JP6802020B2 - Seating device - Google Patents

Description

The present invention relates to a seating device such as a passenger seat of a vehicle.

Conventionally, most seating devices such as passenger seats are seating devices that can shift to a reclining state in which the backrest is tilted backward. In the transition to the reclining state, the seat may be configured to move forward as well as to tilt the backrest. At this time, if the seating surface on the front end side of the advanced seating portion presses on the back of the knee of the seated person, the seated person may feel uncomfortable.

Therefore, in order to suppress such a feeling of discomfort, the seat portion is separated into a seat portion main body and a front end portion having a front end side seat surface, and the front end side seat surface is rotated downward when shifting to the reclining state. A seating device configured to allow the seating device has been proposed (see, for example, Patent Document 1). In the seating apparatus of Patent Document 1, the seat body and the front end portion are connected by a link mechanism, and the front end side seat surface at the front end portion is rotated downward by the link mechanism in conjunction with the advancement of the seat body. It is configured to let you.

Japanese Unexamined Patent Publication No. 2000-333764

By the way, seating devices such as passenger seats are subjected to various adjustments and changes at the design stage or the trial production stage so as to accommodate seaters of various physiques. Similar adjustments and changes are made to the configuration in which the front end side seat surface is rotated downward in order to suppress discomfort to the seated person. However, in the seat device of Patent Document 1 described above, the link mechanism for connecting the seat body and the front end is complicated, and it is difficult to make adjustments and changes at the design stage and the trial production stage.

Therefore, an object of the present invention is to provide a seating device capable of easily adjusting or changing a mechanism for suppressing a feeling of discomfort of a seated person in the transition to a reclining state at a design stage or a trial production stage.

The invention according to claim 1, which has been made to solve the above-mentioned problems, is a seat device capable of shifting to a reclining state in which the backrest is tilted backward, and is a seat body and a side of the seat body. A guide side plate that is erected on the side and guides the seat body so that the seat body advances in the transition to the reclining state, and a guide side plate that is arranged on the front side of the seat body and is arranged on the upper surface of the seat body. It has a front end side seat surface that constitutes a seat surface, and includes a front end portion that is rotatably connected to the seat portion main body around a rotation axis in the left-right direction, and a part of the front end portion It extends rearward beyond the rotation axis and advances together with the seat body in a state of being overlapped with the guide side plate, and a part of the front end portion protrudes to the guide side plate. A rear-side protruding shaft is provided, and the guide-side plate is a groove into which the rear-side protruding shaft is fitted, and the rear-side protruding shaft is raised around the rotation shaft when the front end portion is advanced. By guiding along the orbit that advances while moving forward, around the rotation axis of the front end side seating surface located on the opposite side of the rotation axis from the front end portion to a part of the front end portion. It is a seat device characterized in that a front end guide groove for guiding downward rotation is provided.

According to the second aspect of the present invention, the seat body is provided with a main body-side protruding shaft projecting to the guide side plate, and the guide side plate is a groove into which the main body-side protruding shaft is fitted. A main body guide groove for guiding the advancement of the seat body is provided by guiding the advancement of the main body side projecting shaft in the transition to the reclining state, and the front end guide groove is below the main body guide groove and on the front side. The seating device according to claim 1, wherein the seating device is formed along a trajectory that approaches the main body guide groove toward the main body.

In the invention according to claim 3, the front end portion extends in the front-rear direction and is connected to the rotation shaft in the middle, and one end thereof extends rearward beyond the rotation shaft as a part thereof. The seating apparatus according to claim 1 or 2, further comprising a moving arm, wherein the rear protruding shaft is provided at one end of the rotating arm.

The invention according to claim 4 is characterized in that the guide side plate guides the seat body so that the backrest side of the seat body moves forward while descending when the seat body shifts to the reclining state. The seating device according to any one of items 1 to 3.

The invention according to claim 5 is any of claims 1 to 4, wherein the guide side plate guides the tilting of the backrest as well as the advancement of the seat body when shifting to the reclining state. The seating device according to the first paragraph.

According to the first aspect of the present invention, at the time of transition to the reclining state, at the front end portion, the front end side seat surface forming the seat surface together with the upper surface of the seat portion main body rotates downward around the above-mentioned rotation axis. Move. As a result, the pressure on the back of the knee of the seated person by the front end side seating surface is suppressed, and as a result, the discomfort of the seated person is suppressed. At this time, the downward rotation of the front end side seat surface is performed by the rear side protruding shaft provided in a part extending rearward at the front end portion and the front end guide groove for guiding the rear side protruding shaft. According to this mechanism, adjustments and changes at the design stage and the trial production stage are made by adjusting or changing the trajectory of the front end guide groove, and the trajectory of such a groove can be easily adjusted or changed to the desired trajectory. It is possible to do. Therefore, according to the first aspect of the present invention, the mechanism for suppressing the discomfort of the seated person in the transition to the reclining state can be easily adjusted or changed at the design stage or the trial production stage.

According to the second aspect of the present invention, in both the seat body and the front end portion, the movement at the time of transition to the reclining state is guided by the groove provided in the guide side plate, so that the seat body is also included. The mechanism is simple and compact. Then, the movement of the front end portion can be adjusted or changed depending on how the front end guide groove is made to approach the main body guide groove. That is, according to the second aspect of the present invention, the mechanism for suppressing the discomfort of the seated person in the transition to the reclining state can be more easily adjusted or changed at the design stage or the trial production stage.

In the invention according to claim 3, the front end portion is connected to the seat portion main body via a rotating arm, and a rear side protruding shaft is provided at one end thereof. Since the rotating arm can be easily designed to have a shape that avoids interference as appropriate according to the internal structure of the seat device, adjustments and changes can be made more easily at the design stage and the trial production stage.

According to the invention of claim 4, since the seat body moves forward while the backrest side of the seat body descends, the posture of the seated person in the reclining state is stabilized, and the discomfort of the seated person can be further suppressed. it can.

According to the invention of claim 5, since the backrest is also guided by the guide side plate, the seating device can be downsized and the manufacturing cost can be reduced as compared with the case where such a mechanism is separately prepared. Can be done.

It is a perspective view which shows the seat device of 1st Embodiment so that the internal structure thereof can be seen. It is a side view which shows the arrow V11 arrow view in FIG. It is a figure which shows the state that the seat device of 1st Embodiment has shifted to the reclining state by the same perspective view as FIG. It is a figure which shows the state which the seat device of 1st Embodiment has shifted to the reclining state by the same side view as FIG. It is a figure which shows the seat device of the comparative example with respect to the seat device of 1st Embodiment by the side view of the reclining state. It is a perspective view which shows the seat device of 2nd Embodiment so that the internal structure thereof can be seen. It is a side view which shows the arrow V21 arrow | view in FIG. It is a figure which shows the state which the seat device of 2nd Embodiment has shifted to the reclining state by the same perspective view as FIG. It is a figure which shows the state which the seat device of 2nd Embodiment has shifted to the reclining state by the same side view as FIG.

Hereinafter, the seating apparatus according to the embodiment of the present invention will be described. First, the seat device of the first embodiment will be described. The top, bottom, left, right, front and back used in the following description are the top, bottom, left, right, front and back as seen from the seated person seated in the seating device.

FIG. 1 is a perspective view showing the seating apparatus of the first embodiment so that its internal structure can be seen. Further, FIG. 2 is a side view showing the arrow V11 in FIG. 1.

The seat device 1 of the present embodiment is a passenger seat installed in the passenger compartment of a vehicle such as a railroad vehicle. The seat device 1 includes a seat main body 110, a front end portion 120, an underframe 130, and a backrest 140.

The seat device 1 is capable of freely shifting to a reclining state described later in which the backrest 140 is tilted backward. 1 and 2 show the seating device 1 in an upright state with the backrest 140 standing upright.

The seat body 110 includes a seat frame 111 movably provided in the front-rear direction D11 with respect to the underframe 130, and a cushion material 112 attached to the seat frame 111.

The seat frame 111 includes a pair of seat frame side plates 111a, a seat frame front bar 111b, and a seat frame rear bar 111c. The pair of seat frame side plates 111a are each formed in a strip shape and are arranged to face each other in the left-right direction D12. One seat frame front bar 111b is provided by connecting the front ends of the seat frame side plates 111a, and two seat frame rear bars 111c are provided by connecting the rear ends of the seat frame side plates 111a.

On the rear side of the seat frame side plate 111a at the connection point with the seat frame front bar 111b, a first main body side projecting shaft 111a-1 projecting outward in the left-right direction D12 is provided. Further, on the front side of the seat frame side plate 111a at the connection point with the seat frame rear bar 111c, a second main body side projecting shaft 111a-2 projecting to the outside in the left-right direction D12 is provided.

The front end portion 120 is arranged on the front side of the seat portion main body 110, and is rotatably connected to the seat portion main body 110 around the rotation shaft 120a in the left-right direction D12. The front end portion 120 has a front end side seat surface 120b forming a seat surface together with the upper surface 110a of the seat portion main body 110. The rotation shaft 120a is a shaft that passes through the center of the seat frame front bar 111b, and the front end portions 120 are connected to both ends of the seat frame front bar 111b.

The front end portion 120 includes a pair of rotating arms 121, a front end portion bar 122, and a cushion material 123. The rotating arm 121 is an inverted S-shaped plate member extending in the front-rear direction D11. The rotating arm 121 is rotatably connected to the end of the seat frame front bar 111b as the rotating shaft 120a at substantially the center of the inverted S shape. One end 121a thereof extends downward beyond the rotation shaft 120a and then extends rearward. On the other hand, the other end 121b of the rotating arm 121 extends obliquely forward from the rotating shaft 120a. One front end bar 122 is provided by connecting the other ends 121b of the rotating arm 121 to each other. A cushion material 123 is assembled to the other end 121b of the rotating arm 121 and the front end bar 122.

The one end 121a of the rotating arm 121 extending rearward is provided with a rearward protruding shaft 121a-1 projecting outward in the left-right direction D12.

The underframe 130 is fixed on the floor and includes a pair of guide side plates 131. The guide side plate 131 is erected on the side of the seat body 110, and the seat body 110 is sandwiched between the pair of guide side plates 131. As will be described later, the rotation arm 121 at the front end 120 extends beyond the rotation shaft 120a to a position where the front end 120 overlaps with the guide side plate 131 even if the front end 120 advances together with the seat body 110. ing.

The first main body guide groove 131a into which the first main body side protruding shaft 111a-1 and the second main body side protruding shaft 111a-2 protruding from the seat frame side plate 111a of the seat main body 110 are fitted into the guide side plate 131 and A second main body guide groove 131b is provided. These two main body guide grooves 131a and 131b extend linearly in the front-rear direction D11, the first main body guide groove 131a has an upward slope on the front side, and the second main body guide groove 131b has a downward slope. It has become.

Further, the guide side plate 131 is provided with a front end guide groove 131c into which the rear side protruding shaft 121a-1 protruding from one end 121a of the rotating arm 121 at the front end portion 120 is fitted. The front end guide groove 131c extends linearly in the front-rear direction D11 below the first main body guide groove 131a, and has an upward slope toward the front side. The ascending gradient of the front end guide groove 131c is steeper than the ascending gradient of the first main body guide groove 131a, and the front end guide groove 131c is a trajectory that approaches the first main body guide groove 131a as it goes toward the front side. It is formed along.

Further, the guide side plate 131 is also provided with a backrest guide groove 131d into which the backrest side protruding shaft 141a-2 provided in the backrest 140 described below is fitted. The backrest guide groove 131d extends linearly in the front-rear direction D11 on the rear side of the second main body guide groove 131b, and has a downward slope on the front side. The rear end of the backrest guide groove 131d is located slightly higher than the rear end of the second main body guide groove 131b, and its downward slope is steeper than the downward slope of the second main body guide groove 131b. There is.

The backrest 140 includes a back frame 141 that can freely fall and stand backward with respect to the underframe 130, and a cushion material 142 attached to the back frame 141.

The back frame 141 includes a pair of back frame side plates 141a, an upper connecting plate 141b, a lower connecting plate 141c, and two intermediate connecting plates 141d. The cushion material 142 is assembled to the back frame 141 made of these plate members.

The back frame side plate 141a has a horizontal bar portion 141a-1 whose lower portion projects in the front-rear direction D11, and has a long inverted T-shape in the vertical direction D13. The horizontal bar portion 141a-1 is sandwiched between the seat frame side plate 111a of the seat portion main body 110 and the guide side plate 131 of the underframe 130. The seat frame side plate 111a is located inside the horizontal bar portion 141a-1, and the guide side plate 131 is located outside the horizontal bar portion 141a-1.

A second main body-side protruding shaft 111a-2 from the seat frame side plate 111a penetrates the front end of the horizontal bar portion 141a-1. As a result, the back frame 141, that is, the backrest 140 rotates with respect to the seat frame 111, that is, the seat body 110, around the rotation axis passing through the center of the second main body side projecting shaft 111a-2. It is freely connected. The second main body side protruding shaft 111a-2 penetrating the front end of the horizontal bar portion 141a-1 is fitted into the second main body guide groove 131b in the guide side plate 131.

At the rear end of the horizontal bar portion 141a-1, a backrest-side protruding shaft 141a-2 projecting outward in the left-right direction D12 is provided. The backrest side protruding shaft 141a-2 is fitted into the backrest guide groove 131d in the guide side plate 131.

In the seat device 1 of the present embodiment, the seat body 110 and the backrest 140 are moved by an actuator (not shown) between the upright state shown in FIGS. 1 and 2 and the reclining state described below. , The transition of the posture is performed.

FIG. 3 is a perspective view similar to FIG. 1 showing a state in which the seat device of the first embodiment has shifted to the reclining state. Further, FIG. 4 is a side view similar to that of FIG. 2 showing a state in which the seat device of the first embodiment has shifted to the reclining state.

In the seat device 1 of the present embodiment, the reclining state is a state in which the backrest 140 is tilted backward and the seat body 110 is advanced. The movement of the seat body 110 at this time is guided by the two body guide grooves 131a and 131b in the guide side plate 131 of the underframe 130. In the upright state shown in FIGS. 1 and 2, the first main body side protruding shaft 111a-1 is located at the rear end of the first main body guide groove 131a, and the second main body side protruding shaft 111a-2. Is located at the rear end of the second main body guide groove 131b. When the seat main body 110 advances from this state, the first main body side protruding shaft 111a-1 is guided along the uphill trajectory by the uphill first main body guide groove 131a. Further, the second main body side protruding shaft 111a-2 is guided along the downward slope trajectory by the second main body guide groove 131b having a downward slope. As a result, the seat body 110 is guided in the direction of arrow D14 so that the backrest 140 side descends and the front end 120 side rises and advances. In such an advance of the seat body 110, as shown in FIGS. 3 and 4, two main body side projecting shafts 111a-1 and 111a-2 are provided at the front ends of the two main body guide grooves 131a and 131b. Up to the reached position, it can be continued to a desired position according to the operation of the seated person Y.

Further, along with the movement of the seat body 110, the movement of the backrest 140 is also guided as follows. This includes a second main body-side protruding shaft 111a-2 penetrating the front end of the horizontal bar portion 141a-1 at the lower portion of the back frame side plate 141a, and a backrest-side protruding shaft 141a-2 at the rear end of the horizontal bar portion 141a-1. Is guided by the second main body guide groove 131b and the backrest guide groove 131d.

First, in the upright state shown in FIGS. 1 and 2, the second main body side protruding shaft 111a-2 is located at the rear end of the second main body guide groove 131b, and the backrest side protruding shaft 141a-2. Is located at the rear end of the backrest guide groove 131d. As described above, the rear end of the backrest guide groove 131d is slightly higher in the vertical direction D13 than the rear end of the second main body guide groove 131b, so that the horizontal bar portion 141a-1 is slightly lowered in the upright state. It is in a sloped posture, with the backrest 140 standing upright.

In the transition to the reclining state shown in FIGS. 3 and 4, the horizontal bar portion 141a-1 at the lower part of the backrest 140 advances as the seat body 110 advances from this upright state. At this time, the second main body side protruding shaft 111a-2 is guided along the downward slope trajectory by the second main body guide groove 131b having a downward slope. Further, the backrest side projecting shaft 141a-2 is guided along a downward slope trajectory with a steeper slope by the backrest guide groove 131d having a downward slope. As a result, the horizontal bar portion 141a-1 is guided so that the rear end side moves forward while descending from the front end side. By the guidance of the horizontal bar portion 141a-1, the horizontal bar portion 141a-1 becomes an upward slope and the backrest 140 falls backward as indicated by the arrow D15. As shown in FIGS. 3 and 4, the second main body side protruding shaft 111a-2 and the backrest side protruding shaft 141a-2 have the second main body guide groove 131b and the backrest guide groove. It can be continued up to the desired position of the seater Y, up to the position reached the front end of 131d.

Then, in the present embodiment, the front end side seat surface 120b of the front end portion 120 is guided as follows in the transition to such a reclining state. This is done by guiding the rotation arm 121 of the front end portion 120 to rotate around the rotation shaft 120a in the left-right direction D12. The rotating arm 121 connected to the seat body 110 by the rotating shaft 120a advances together with the seat body 110. At this time, the rear-side protruding shaft 121a-1 provided at one end 121a extending rearward of the rotating arm 121 is guided along the orbit of the uphill by the front end guide groove 131c of the uphill. Here, the rotation shaft 120a is guided by the first main body guide groove 131a and advances together with the seat main body 110. On the other hand, the front end guide groove 131c is formed along a trajectory that approaches the first main body guide groove 131a toward the front side as described above. As a result, the rear-side protruding shaft 121a-1 is guided along the orbit that moves forward while rising around the rotation shaft 120a. As a result, the portion of the cushion material 123 located on the front end portion 120 on the side opposite to one end 121a of the rotation arm 121 with the rotation shaft 120a sandwiched, that is, the front end side seat surface 120b is around the rotation shaft 120a. , As indicated by the arrow D16, it will rotate downward. This rotation is performed in a degree corresponding to the degree of advancement of the seat body 110.

FIG. 5 is a view showing a side view of a seating device of a comparative example with respect to the seating device of the first embodiment in a reclining state.

In the seat device 5 of this comparative example, the seat portion 510 is integrally formed including the front end portion thereof. The seat 510 is provided with first and second protruding shafts 511 and 512, and is fitted into the first and second seat guide grooves 521a and 521b in the guide side plate 521 of the underframe 520. There is. The second seat protruding shaft 512 penetrates the front end of the horizontal bar portion 531 at the lower part of the backrest 530 and is fitted into the second seat guide groove 521b. Further, the backrest side protruding shaft 531a provided at the rear end of the horizontal bar portion 531 is fitted into the backrest guide groove 521c.

The first seat guide groove 521a is formed on an upward slope in front of the front-rear direction D51, and the second seat guide groove 521b is formed on a downward slope. Further, the backrest guide groove 521c is formed below the second seat guide groove 521b with a steeper downward slope than the second seat guide groove 521b. In the seat device 5 of the comparative example, guided by these guide grooves 521a, 521b, 521c, the seat portion 510 advances in the direction of arrow D53 while the backrest 530 side descends, and the backrest 530 falls in the direction of arrow D54. ..

Here, in the seat device 5 of the comparative example, the front end of the seat portion 510 advances in the direction of the arrow D55 while rising in the vertical direction D52. At this time, the seat surface on the front end side of the advanced seat portion 510 tends to push up the back of the knee of the seater Y. If the seater Y has a small physique, as illustrated in FIG. 5, the heel may be pushed up to the extent that it floats from the floor surface. In such a state, the front end side seat surface of the seat portion 510 There is a risk that the back of the knee will be compressed and the seated person Y will feel uncomfortable.

On the other hand, in the seat device 1 of the first embodiment described above, the front end side seat surface 120b at the front end portion 120 rotates downward around the rotation shaft 120a at the time of transition to the reclining state. As a result, the pressure on the back of the knee of the seated person Y is suppressed, and as a result, the discomfort of the seated person Y is suppressed.

At this time, the downward rotation of the front end side seat surface 120b is performed by the rear side protruding shaft 121a-1 provided on the front end portion 120 and the front end guide groove 131c for guiding the rear side protruding shaft 121a-1. .. According to this mechanism, adjustments and changes in the design stage and the trial production stage are performed by adjusting or changing the track in the front end guide groove 131c. The trajectory of such a front end guide groove 131c can be easily adjusted or changed to a desired trajectory. Therefore, according to the seat device 1 of the present embodiment, the mechanism for suppressing the discomfort of the seated person Y in the transition to the reclining state can be easily adjusted or changed at the design stage or the trial production stage.

Further, in the seat device 1 of the present embodiment, the movements of the seat body 110 and the front end 120 at the time of transition to the reclining state are guided by the guide grooves 131a, 131b, 131c provided in the guide side plate 131. Will be done. Therefore, the mechanism including the seat body 110 is simply and compactly organized. Then, the movement of the front end side seat surface 120b can be adjusted or changed depending on how the front end guide groove 131c has a trajectory approaching the first main body guide groove 131a as described above. .. For example, when it is desired to increase the degree of rotation, the ascending slope of the front end guide groove 131c may be made steeper and adjusted so as to be closer to the first main body guide groove 131a. On the other hand, when it is desired to suppress the degree of rotation, the ascending slope of the front end guide groove 131c may be made gentle, and adjustment may be made so as to suppress the degree of approach to the first main body guide groove 131a. That is, according to the seat device 1 of the present embodiment, the mechanism for suppressing the discomfort of the seated person Y in the transition to the reclining state can be more easily adjusted or changed at the design stage or the trial production stage.

Further, in the seat device 1 of the present embodiment, the front end portion 120 is connected to the seat portion main body 110 via the rotating arm 121, and the rear side protruding shaft 121a-1 is provided at one end 121a thereof. The rotating arm 121 can be easily designed to have a shape that avoids interference as appropriate according to the internal structure of the seat device 1. In the present embodiment, the rotating arm 121 is formed in an inverted S shape extending in the front-rear direction D11 according to the internal structure of the seat device 1. As described above, according to the seat device 1 of the present embodiment, adjustments and changes can be made more easily at the design stage and the trial production stage.

Further, in the seat device 1 of the present embodiment, since the seat body 110 moves forward while the backrest 140 side of the seat body 110 descends, the posture of the seater Y in the reclining state is stable, and the seater Y feels uncomfortable. Can be further suppressed.

Further, in the seat device 1 of the present embodiment, since the backrest 140 is also guided by the guide side plate 131, the size of the seat device 1 is reduced and the manufacturing cost is reduced as compared with the case where such a mechanism is separately prepared. Is planned.

Next, the second embodiment will be described. The second embodiment is different from the first embodiment described above in that a leg rest for foot rest is provided. Hereinafter, the second embodiment will be described by paying attention to the differences from the first embodiment.

FIG. 6 is a perspective view showing the seating apparatus of the second embodiment so that its internal structure can be seen. Further, FIG. 7 is a side view showing the arrow V21 in FIG. Further, FIG. 8 is a view showing a state in which the seat device of the second embodiment has shifted to the reclining state in the same perspective view as in FIG. Further, FIG. 9 is a side view similar to FIG. 7 showing how the seat device of the second embodiment has shifted to the reclining state.

In addition, in these FIGS. 6 to 9, the same reference numerals as those in FIGS. 1 to 4 are attached to the components equivalent to the components shown in FIGS. 1 to 4 referred to in the first embodiment described above. In the following, these equivalent components will be outlined below.

Even in the seat device 2 of the second embodiment, each part is guided as follows when shifting to the reclining state. That is, the first and second main body side projecting shafts 111a-1 and 111a-2 of the seat main body 110 are guided by the first and second main body guide grooves 131a and 131b in the guide side plate 131 of the underframe 130. .. As a result, the seat body 110 is guided in the direction of the arrow D24 so that the backrest 140 side descends and the front end portion 120 side rises in the vertical direction D23 and advances in the front-rear direction D21. Further, a second main body-side projecting shaft 111a-2 penetrating the front end of the horizontal bar portion 141a-1 at the lower portion of the backrest 140 and a dorsal-side protruding shaft 141a-2 at the rear end of the horizontal bar portion 141a-1 are formed. It is guided by the second main body guide groove 131b and the backrest guide groove 131d. As a result, the horizontal bar portion 141a-1 becomes an ascending slope, and the backrest 140 falls backward as indicated by the arrow D25. Then, the rear side protruding shaft 121a-1 provided at one end 121a extending rearward of the rotating arm 121 is guided along the orbit of the uphill by the front end guide groove 131c of the uphill. As a result, the portion of the cushion material 123 located on the front end portion 120 on the side opposite to one end 121a of the rotating arm 121 with the rotating shaft 120a in the left-right direction D22 sandwiched around the rotating shaft 120a is indicated by an arrow D26. Rotate downwards as shown. That is, the front end side seat surface 120b at the front end portion 120 rotates downward as indicated by the arrow D26.

Here, the seat device 2 of the present embodiment includes a leg rest 210 for mounting a foot. The leg rest 210 includes a frame portion 211 and a cover portion 212. Then, the frame portion 211 is rotatably attached in the direction of the arrow D27 to the other end 121b on the opposite side of the rotating arm 121 of the front end portion 120, which is provided with the rear protruding shaft 121a-1. There is.

The seat body 110 is equipped with an actuator (not shown) for rotating the leg rest 210. The rotation of the leg rest 210 is performed by the actuator in response to the operation of the seated person Y.

In the present embodiment, since the leg rest 210 is rotated in response to the request of the seater Y in this way, the leg rest 210 is in a state of hanging down to the floor surface as shown in FIGS. 6 and 7. The transition to the reclining state may be performed as it is.

Here, it is assumed that a similar leg rest 210 is attached to the front end of the seat portion 510 of the seat device 5 of the comparative example described with reference to FIG. In this case, in the seat device 5 of the comparative example, the front end of the seat portion 510 moves forward while rising in the direction of arrow D55 when shifting to the reclining state. Assuming that this transition is performed with the leg rest 210 hanging down, the angle between the leg rest 210 and the seat surface of the seat 510 is maintained, so that the leg rest responds to the movement of the front end of the seat 510. 210 is flipped up. The leg rest 210 flipped up in this way may press the calf of the seated person Y and give a feeling of strangeness.

On the other hand, in the present embodiment, as shown by arrows D26 in FIGS. 8 and 9, the front end side seat surface 120b at the front end portion 120 rotates downward in the transition to the reclining state. The rotation of the front end side seat surface 120b is due to the downward rotation of the other end 121b to which the frame portion 211 of the leg rest 210 is attached to the rotation arm 121. Therefore, when the transition to the reclining state is performed with the leg rest 210 hanging down, the angle formed by the leg rest 210 and the front end side seat surface 120b is maintained, and the upper surface 110a of the uphill seat body 110 is maintained. The angle between and is sharpened. As a result, in the present embodiment, the flip-up of the leg rest 210 as described above is suppressed, so that the discomfort of the seated person Y is suppressed.

It should be noted that the embodiments described above merely show typical embodiments of the present invention, and the present invention is not limited to this embodiment. That is, it can be modified in various ways without departing from the gist of the present invention. As long as the seating device of the present invention is still provided by such a modification, it is, of course, included in the category of the present invention.

For example, in the first and second embodiments described above, as an example of the front end guide groove and the main body guide groove according to the present invention, the front end guide groove 131c extending linearly and the first and second main body guide grooves 131a, 131b is illustrated. However, the shape of the front end guide groove and the main body guide groove referred to in the present invention is not limited to a linear shape, and can be set to an arbitrary shape according to the locus of the seat main body and the front end portion to be moved. The same applies to the shape of the backrest guide groove.

Further, in the first and second embodiments described above, as an example of the front end portion referred to in the present invention, the front end portion 120 connected to the seat body 110 via the rotating arm 121 is exemplified. However, the front end portion referred to in the present invention is not limited to this. The front end portion referred to in the present invention is rotatably connected to the seat body around the rotation shaft, and a part thereof rotates to a position where it overlaps with the guide side plate even if it advances together with the seat body. As long as it extends beyond the axis, it does not ask the specific connection configuration with the seat body. However, by adopting a connection configuration via a rotating arm, it is possible to easily design a shape that avoids interference as appropriate according to the internal structure of the seat device, which makes it even easier at the design stage and the trial production stage. The points that can be adjusted or changed are as described above.

Further, in the first and second embodiments described above, as an example of the rotating arm according to the present invention, the rotating arm 121 formed in an inverted S shape is exemplified. However, the shape of the rotating arm according to the present invention is not limited to the inverted S shape, and may be linear, for example, as long as interference with the internal structure of the seat device can be avoided. It does not ask the shape.

1, 2 Seating device 110 Seat body 111a-1 First body side protruding shaft 111a-2 Second body side protruding shaft 120 Front end 120a Rotating shaft 120b Front end side seat surface 121 Rotating arm 121a One end 121a-1 Rear protruding shaft 121b Other end 130 Underframe 131 Guide side plate 131a First main body guide groove 131b Second main body guide groove 131c Front end guide groove 131d Back leaning guide groove 140 Back leaning 141a-2 Back leaning side protruding shaft 210 Leg rest

Claims (5)

It is a seating device that can shift to a reclining state where the backrest has fallen backwards.
The seat body and
A guide side plate that is erected on the side of the seat body and guides the seat body so that the seat body advances in the transition to the reclining state.
It is arranged on the front side of the seat body, has a front end side seat surface forming a seat surface together with the upper surface of the seat body, and is rotatably connected to the seat body around a rotation axis in the left-right direction. With a front end that is
A part of the front end portion extends rearward beyond the rotation axis, and moves forward together with the seat portion main body in a state of being overlapped with the guide side plate.
A rear-side protruding shaft protruding toward the guide side plate is provided on a part of the front end portion.
The guide side plate is a groove into which the rear protruding shaft is fitted, and guides the rear protruding shaft along a trajectory that advances while rising around the rotating shaft when the front end portion is advanced. By doing so, the front end of the front end side seating surface located on the side opposite to a part of the front end portion across the rotation shaft at the front end portion guides the downward rotation around the rotation shaft. A seating device characterized by being provided with a guide groove. The seat body is provided with a body-side protruding shaft protruding toward the guide side plate.
The guide side plate is a groove into which the main body side protruding shaft is fitted, and is a main body guide groove that guides the advancement of the main body side protruding shaft when shifting to the reclining state. Is provided,
The seating apparatus according to claim 1, wherein the front end guide groove is formed below the main body guide groove along a trajectory that approaches the main body guide groove toward the front side. The front end portion is provided with a rotation arm extending in the front-rear direction and connected to the rotation shaft in the middle, and one end thereof extends rearward beyond the rotation shaft as a part of the front end portion.
The seating apparatus according to claim 1 or 2, wherein the rear-side protruding shaft is provided at one end of the rotating arm. Any one of claims 1 to 3, wherein the guide side plate guides the seat body so that the backrest side of the seat body moves forward while descending when the transition to the reclining state occurs. The seating device according to paragraph 1. The seating apparatus according to any one of claims 1 to 4, wherein the guide side plate guides the tilting of the backrest as well as the advancement of the seat body when shifting to the reclining state. ..

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