WO2012176738A1

WO2012176738A1 - Armrest and seat

Info

Publication number: WO2012176738A1
Application number: PCT/JP2012/065544
Authority: WO
Inventors: 藤田　悦則; 宏文水野; 有二服部; 昭一橋本
Original assignee: 株式会社デルタツーリング
Priority date: 2011-06-18
Filing date: 2012-06-18
Publication date: 2012-12-27
Also published as: JP2013001292A

Abstract

Provided is an armrest that can be produced at a low cost and with a lightweight structure, and is able to prevent pinching of clothes or fingers by means of a simple structure. A core plate (20) and a cover member (30) are integrally formed, the core plate (20) is, excepting a portion of the surface thereof, covered by the cover member (30), and the base (21) of the core plate (20) is disposed face-to-face with a base member (10) provided with stoppers (10b, 10c) that limit the range of pivoting of the core plate (20). The contact between the stoppers (10b, 10c) and the core plate (20) in both a normal-use position and a flipped-up position of the armrest (1) is within the range that is covered by the cover member (30), and so clothing and fingers are not pinched between the two.

Description

Armrest and seat

The present invention relates to an armrest and a seat including the armrest, and particularly to an armrest attached to a vehicle seat such as an aircraft, a train, a ship, and a bus, and a seat including the armrest.

For example, in the seats installed in aircraft cabins, the armrests on the aisle side are often fixed, but movable armrests are adopted for at least some seats so that wheelchair users can easily move to the seats. Has been. For example, in FIG. 11, which is shown as a conventional example in Patent Document 1, the base end portion of the armrest is pivotally supported on the seat back portion, and is flipped upward from a substantially horizontal state that is a normal use position. A mechanism for displacing the posture along the side of the part is shown. Similarly, FIG. 12, which is shown as a conventional example in Patent Document 1, shows a mechanism in which a guide groove is provided in the side portion of the seat back portion and the armrest is moved up and down along the guide groove.

JP-A-6-156393 (FIGS. 11 and 12)

Each of the mechanisms shown in FIGS. 11 and 12 of Patent Document 1 is a mechanism that supports the front end side of the armrest via a stay that is rotatably supported by the seat cushion portion, and moves the armrest up and down. When moving, clothes and fingers may be pinched by the displacement of these stays. In addition, an armrest is also known in which a gantry frame is installed along the sides of the seat cushion part and the seat back part, and the base end part is pivotally supported on the upper part of the gantry frame. There is a possibility that clothes and fingers may be caught between the upper part of the gantry frame and the base end part of the armrest. Of course, in such a conventional configuration, various measures are taken in order to prevent clothes, fingers, etc. from being pinched, but such a measure complicates the structure and increases the number of parts. There was a problem that it tends to be, and the weight also becomes heavy.

On the other hand, when the armrest is made movable, careless movement during takeoff and landing must be avoided. For this reason, it is necessary for the passengers to perform unlocking for moving the armrest basically so that passengers cannot easily operate.

The present invention has been made in view of the above, and it is an object of the present invention to provide an armrest that can prevent clothes and fingers from being pinched with a simple structure, can be manufactured at a low cost, and a seat including the armless. Furthermore, in addition to this problem, an object of the present invention is to provide an armrest and a seat provided with the armrest so that a passenger cannot easily operate unlocking that moves the armrest.

In order to solve the above-described problems, the present invention provides an armrest provided on an attachment target portion so as to be rotatable in a range between a normal use position and a flip-up position, and a base member attached to the attachment target portion, a base A plate covering portion that covers the core plate except for a face of the core plate having a predetermined length pivotally supported by the base member and an end surface facing the base member at a base end portion of the core plate. And a cover member made of a synthetic resin integrally molded with the core plate, and a base member that is molded into a substantially I-shaped cross section having a protruding piece projecting outward from a peripheral edge of the plate covering portion, The core plate is protruded from the upper end edge side and the lower end edge side of the base end portion of the core plate with the rotation center of the core plate interposed therebetween, and the core plate is in both the normal use position and the flip-up position. DOO together in contact, provides armrest, characterized in that a pair of stopper portions dispersed borne by both the load applied to the core plate.

In the cover member, it is laminated on the surface opposite to the surface facing the base member at the base end of the core plate, and supports the base end of the core plate together with the base member, and It is preferable to provide a support disk having stopper part insertion holes through which the ends of the pair of stopper parts are inserted. A lock mechanism for locking the core plate at the normal use position and the flip-up position, which is in contact with a lock shaft receiving portion formed on the core plate, and is in the normal use position or the flip-up position. A lock shaft for restricting the rotation of the core plate; a lock spring that engages with the lock shaft and maintains a state in which the lock shaft receiving portion is in contact with or released from the lock shaft; and the lock spring The lock spring is biased in a direction in which the lock spring is engaged with the lock shaft, and a release knob that releases the engagement of the lock spring with the lock shaft by moving against the biasing force, Covering the release knob and solving the contact operation or contact state of the lock shaft with the lock shaft receiving portion It is preferable to have a locking mechanism that includes a dummy cover for action. It is preferable that the pair of stopper portions are provided at symmetrical positions with respect to the rotation center of the core plate in the base member. It is preferable that the base member is attached to a side frame of a seat back portion as the attachment target portion.

The present invention also provides a seat including a seat back portion and a seat cushion portion, wherein the armrest is provided by attaching a base member to a side frame of the seat back portion. I will provide a.

The armrest of the present invention has a core plate and a cover member that are integrally formed, the core plate is covered with a cover member except for a part of the surface, and a base that includes a stopper portion that regulates the rotation range of the core plate The base end portion of the core plate is disposed facing the member. Therefore, in both the normal use position and the flip-up position of the armrest, the contact between the stopper portion and the core plate is performed in the range covered with the cover member, so that clothes and fingers are sandwiched between them. There is no such thing as being overwhelmed. In addition, since the core plate is in contact with both of the pair of stopper portions in both the normal use position and the flip-up position, and the load is distributed by both stopper portions, the conventional flip-up type described above is used. A member such as a stay that supports a load is not required like an armrest, and the structure is simple, the number of parts is small, the weight can be reduced, and it can be manufactured at a lower cost.

Also, when releasing the lock when moving the armrest, by adopting a lock mechanism with a dummy cover as well as a release knob, it is not easy for passengers to find a means to unlock, and careless during takeoff and landing Helps to prevent proper movement.

FIG. 1 is a perspective view of a main part of a seat provided with an armrest according to an embodiment of the present invention as viewed from the front side. FIG. 2A is an exploded perspective view of the armrest of the above embodiment, FIG. 2B is a view showing the position of the disk insertion hole, and FIG. 2C is a lock constituting the lock mechanism. It is the figure which showed the state which assembled | attached the shaft and the dummy cover. FIG. 3 is a plan view of the armrest according to the embodiment. FIG. 4A is a view showing the cover plate and the core plate of the armrest according to the above embodiment, and FIG. 4B shows a state in which the core plate and the cover member are integrally formed. It is a figure. 5A is a side view of the armrest in a state where the lock shaft and the dummy cover are inserted, and FIG. 5B is a cross-sectional view taken along the line BB of FIG. 5A. ) Is an enlarged view of a portion D in FIG. 6A is a side view of the armrest in a state where the lock shaft and the dummy cover are pulled out, and FIG. 6B is a cross-sectional view taken along the line AA in FIG. 6A, and FIG. These are the C section enlarged views of FIG.6 (b). FIG. 7 is a view showing an aircraft seat including the armrest according to the embodiment. FIG. 8 is an exploded perspective view showing a state in which the armrest is attached to the side frame of the seat back portion. FIGS. 9A to 9E are diagrams for explaining a method of operating the armrest from the normal use position to the flip-up position. FIG. 10A is a view showing a state in which the lock spring is engaged with the lock shaft when the release knob is viewed from the front, and FIG. 10B is a view of the release knob from the front. It is the figure which showed the state which rotated the cancellation | release knob in the case of releasing the engagement with the lock shaft of a lock spring. FIG. 11A is a view showing a state in which the lock spring is engaged with the lock shaft when the dummy cover is viewed from the back side, and FIG. 11B is a view of the dummy cover viewed from the back side. It is the figure which showed the state which rotated the cancellation | release knob in the case of releasing the engagement with the lock shaft of a lock spring. FIG. 12A is a diagram showing the positional relationship between the core plate and the stopper portion of the base member in the normal use position, and FIG. 12B shows the positional relationship of the core plate in the flip-up position. FIG. 12C is a diagram showing the positional relationship between the lock shaft receiving portion, the first lock shaft insertion portion, and the lock shaft in the normal use position, and FIG. It is the figure which showed the positional relationship of the shaft receiving part for a lock in a position, the 1st shaft insertion part for a lock, and a lock shaft. FIG. 13A is a diagram showing the positional relationship between the core plate and the stopper portion of the base member in the normal use position with the base member attached to the side frame, and FIG. It is the figure which showed the positional relationship of the core plate, the stopper part of a base member, etc. in the flip-up position in the state attached with the base member to the flame | frame. FIG. 14A is a diagram showing the positional relationship between the core plate and the support disk at the normal use position, and FIG. 14B is a diagram showing the positional relationship between the core plate and the support disk at the flip-up position. is there.

Hereinafter, the present invention will be described in more detail based on embodiments shown in the drawings. FIG. 1 is a view showing a state in which an armrest 1 according to an embodiment of the present invention is provided on a side portion of a seat back portion 110 of a seat (an aircraft cabin seat) 100.

As shown in FIGS. 2 to 6, the armrest 1 includes a base member 10, a core plate 20, a cover member 30, a support disk 40, a lock mechanism 50, and the like. The base member 10 is fixed by screwing or the like with the back surface overlapped at a predetermined position on the side portion (side frame 111) of the seat back portion 110, which is an attachment target portion (see FIGS. 7 and 8). The base member 10 is provided with a hollow shaft portion (hereinafter referred to as “hollow shaft portion”) 10 a in the vicinity of the center of the base member 10 so as to protrude from the surface of the base member 10. In addition, two pairs of

stopper portions

10b and 10c made of protrusions protruding from the surface of the base member 10 are provided at symmetrical positions across the hollow shaft portion 10a.

As shown in FIGS. 2 (a), 3 and 4 (a), the core plate 20 is formed in a long shape and has a shaft insertion hole that penetrates in the thickness direction at the base end portion 21 on one end side in the longitudinal direction. 21a is formed, and the hollow shaft portion 10a is inserted into the shaft insertion hole 21a, so that the shaft can be rotated about the hollow shaft portion 10a. The base end portion 21 is flipped up from the normal use position (positions in FIGS. 12A, 13A, and 14A) (FIGS. 12B, 13B, and 14). b) (the position from the upper edge 211 on the upper side to the lower edge 212 on the lower side in the normal use position) so that it can be rotated between the pair of

stopper portions

10b, 10c. ). Further, the rear end edge side of the base end portion 21 has a narrow width, and stepped

portions

211a and 212a are formed on the upper end edge 211 side and the lower end edge 212 side. A portion adjacent to the front side of the base end portion 21 is provided with

wide portions

211b and 212b wider than the width of the base end portion 21.

Thereby, in the normal use position, the stepped portion 211a of the upper end edge 211 closer to the rear than the shaft insertion hole 21a abuts on one stopper portion 10b, and the lower end edge 212 of the upper end edge 211 closer to the front than the shaft insertion hole 21a. The wide portion 212b abuts against the other stopper portion 10c, the load is distributed to the two

stopper portions

10b and 10c, and the core plate 20 is stably supported in a substantially horizontal posture at the normal use position. At the flip-up position, the wide portion 211b closer to the front than the shaft insertion hole 21a in the upper end edge 211 abuts against one stopper portion 10b, and the step portion closer to the rear than the shaft insertion hole 21a in the lower end edge 212. 212a abuts against the other stopper portion 10c, the load is distributed to the two

stopper portions

10b and 10c, and the core plate 20 is in a substantially vertical posture (position along the side portion of the seat back portion 110) at the flip-up position. Stable support.

In the present embodiment, the reinforcing plates 25 are overlapped and overlapped in the range from the substantially central portion in the longitudinal direction to the rear end edge including the range of the base end portion 21 of the core plate 20.

The cover member 30 is made of synthetic resin and is integrally formed with the core plate 20 (including the reinforcing plate 25). Specifically, as shown in FIG. 4, a plate covering portion 31 that covers the core plate 20 is provided. The plate covering portion 31 is formed in a shape that is slightly larger than the outer shape of the core plate 20. On the periphery of the plate covering portion 31, there are protruding pieces 32 projecting outward on both sides of the plate covering portion 31, which are formed in a substantially I-shaped cross section.

As shown in FIGS. 2A and 4A, the plate covering portion 31 of the cover member 30 covers all the surfaces on the outer surface side of the core plate 20, but is the proximal end, which is the inner surface side. The surface 21b of the portion 21 facing the surface of the base member 10 (in this embodiment, the surface facing the reinforcing plate 25) 21b is in sliding contact with the surface of the base member 10 during rotation, so that it is not covered with synthetic resin. (Refer to Fig. 4 (b), Fig. 5 (b), (Fig. 6 (b)). The plate covering portion 31 is formed on the outer surface of the base end portion 21 (the opposite surface of the facing surface 21b). Is formed so as to have a gap without being in close contact, and a longitudinally long disk insertion hole 31a is formed in the rear end surface of the cover member 30 at a position communicating with the gap (FIG. 2 (b), (Refer FIG.4 (b)).

Further, the plate covering portion 31 is formed with a through hole 31b through which the bolt 11 fitted to the hollow portion of the hollow shaft portion 10a is inserted at a position corresponding to the rotation center of the core plate 20, A spring support protrusion 36 and a shaft guide 37 that support a lock spring 52 and a release knob 53 constituting a lock mechanism 50 described later are formed on the outer surface of the portion 31 so as to be adjacent to each other in the lateral direction (see FIG. 4). .

As described above, the cover member 30 is formed with the protruding piece 32 projecting outward along the peripheral edge of the plate covering portion 31, whereby the lock mechanism 50 including the release knob 53 and the dummy cover 54 is formed. However, it is provided along the outer surface of the plate covering portion 31 and is located inward of the side edge 32a of the projecting piece 32 when the armrest 1 is viewed from the plane (see FIGS. 1 and 2A). By configuring the cover member 30 with such a configuration, it is difficult to find the lock mechanism 50 from passengers seated in the seat while ensuring the ease of operation of the lock mechanism 50 by the cabin crew located in the passage. Further, as will be described later, since the armrest 1 does not rotate unless the dummy cover 54 is pulled out after the release knob 53 is operated, erroneous operation by passengers during takeoff and landing is prevented. High effect.

As shown in FIG. 2A, the support disk 40 is formed of a plate-like body close to a quadrangle, and a bolt insertion hole 40a for inserting the bolt 11 is formed substantially at the center. The bolt insertion hole The stopper part insertion holes 40b and 40c are formed through the part corresponding to the

stopper parts

10b and 10c of the base member 10 at symmetrical positions with respect to 40a. The support disk 40 is inserted through the disk insertion hole 31a formed in the rear end surface of the cover member 30 formed integrally with the core plate 20 and stacked on the outer surface of the base end portion 21. The bolt 11 is fixed by being inserted into the hollow portion of the hollow shaft portion 10a from the outer surface side of the covering portion 31 through the through hole 31b. As a result, the bolt 11 is inserted into the hollow portion of the hollow shaft portion 10a, and the tips of the

stopper portions

10b and 10c are inserted into the stopper portion insertion holes 40b and 40c, respectively, as shown in FIGS. In addition, the core plate 20 is supported at both ends when the base end portion 21 is sandwiched between the base member 10 and the support disk 40, and can bear a larger load than when the support disk 40 is not provided. A rear end surface cover 34 is mounted on the rear end surface of the cover member 30, and the disk insertion hole 31a is hidden (see FIG. 2A).

The lock mechanism 50 includes a lock shaft 51, a lock spring 52, a release knob 53, and a dummy cover 54. As for the lock shaft 51, the rear-end part 51a is supported by the dummy cover 54 (refer FIG.5 (b), FIG.6 (b)). The lock shaft 51 is formed to have a square cross section, in this embodiment, a quadrangular cross section, and locks the core plate 20 so that the core plate 20 cannot rotate when the outer surface abuts against a lock shaft receiving portion 26 formed on the core plate 20. .

Here, in this embodiment, as shown in FIG. 4A, the locking shaft receiving portion 26 is between the stepped portion 212a and the wide portion 212b in the lower end edge 212 of the base end portion 21. It is comprised from the notch groove notched by substantially reverse V shape. As shown in FIGS. 12A, 13A, and 14A, the core plate 20 is placed on the base member 10 and the support disk 40 in the normal use position (substantially horizontal position). The first locking

shaft insertion portions

12 and 42 are formed at portions corresponding to the positions of the locking shaft receiving portions 26 at that time. Further, as shown in FIGS. 12B, 13B, and 14B, the position of the lock shaft receiving portion 26 when the core plate 20 is in the flip-up position (substantially vertical position). The second locking

shaft insertion portions

13 and 43 are respectively formed at portions corresponding to the above. The first locking

shaft insertion portions

12 and 42 and the second locking

shaft insertion portions

13 and 43 are each formed in a substantially square hole so as to match the cross-sectional shape of the lock shaft 51. Also in the position, adjacent ones of the substantially rectangular holes substantially coincide with the rear inclined surface 26a and the front inclined surface 26b of the locking shaft receiving portion 26 formed of a substantially inverted V-shaped cutout groove. It is formed in a direction (see FIGS. 12C and 12D).

As a result, when the lock shaft 51 is inserted into the first lock

shaft insertion portions

12 and 42 in the normal use position, the lock shaft 51 having a substantially square cross section has an oblique positional relationship with respect to the horizontal. The inclined surface 26a is pressed against the opposing outer surface of the lock shaft 51, and the upward rotation is prevented (see FIG. 12C). On the other hand, in the flip-up position, the lock shaft 51 is inserted into the second lock

shaft insertion portions

13 and 43. Also in this case, since the outer surface of the lock shaft 51 having a substantially square cross section is in an oblique positional relationship with respect to the horizontal, even if the core plate 20 tries to rotate forward from the flip-up position, the front inclined surface 26b is the lock shaft 51. Is pressed against the opposing outer surfaces of the, so that forward rotation is prevented (see FIG. 12D).

A shaft guide 37 is integrally formed on the outer surface of the plate covering portion 31 of the cover member 30 as shown in FIG. The shaft guide 37 has a substantially rectangular hollow portion 37b. The hollow portion 37b communicates with the first locking

shaft insertion portions

12 and 42 in the normal use position, and in the flip-up position, the second locking portion. It communicates with the

shaft insertion portions

13 and 43.

The release knob 53 is formed in a shape close to an ellipse in which the upper base and the lower base of the trapezoid are arcuate. Although the shape itself is not limited, the shape as shown in the drawings is preferable so that it can be operated as easily as possible when operating with human hands. The release knob 53 has a shaft guide hole 53a through which the shaft guide 37 formed in the cover member 30 is inserted near the center. Since the release knob 53 is moved in the rotational direction between the position shown in FIG. 10A and the position shown in FIG. 10B, the shaft guide hole 53a is moved by the shaft guide 37 at that time. In order to be able to move relatively in the hole 53a, it is opened in a slightly long shape in an arc along the vertical direction. As shown in FIGS. 2A, 8, and 10, a protrusion hole 53 b is formed so as to penetrate adjacent to one side of the shaft guide hole 53 a. A spring support protrusion 36 formed adjacent to the shaft guide 37 is inserted into the protrusion hole 53b. A spring end engaging portion 53c is provided adjacent to the other side of the shaft guide hole 53a.

The lock spring 52 is disposed in a state where the shaft guide 37 and the spring support protrusion 36 are inserted into the shaft guide hole 53a and the protrusion hole 53b of the release knob 53, respectively. The lock spring 52 is made of a spring material processed into a shape along the periphery of a spring support protrusion 36 having a substantially circular cross section and a shaft guide 37 having a substantially square cross section. More specifically, as shown in FIGS. 10 and 11, one end 52a is engaged with a shaft guide 37 projecting from a shaft guide hole 53a having a substantially square cross section, and the upper surface side of the shaft guide 37 is It is arranged so as to extend to the side of the spring support protrusion 36 protruding from the protrusion hole 53b, and the intermediate part 52b is positioned so as to wrap around the outer periphery of the spring support protrusion 36, and the other end 52c is arranged to engage with a spring end engaging portion 53c provided on the other side of the shaft guide hole 53a, and the other end portion 52c is springed in a direction approaching the one end portion 52a with the midway portion 52b as a center. Force acts. A slit 37a is formed on the lower surface side of the shaft guide 37 (see FIGS. 5B and 5C), and the lower spring portion 52d between the midway portion 52b and the other end portion 52c defines the slit 37a. Through the hollow portion 37b of the shaft guide 37. Accordingly, the lower spring portion 52 d comes into contact with the lock shaft 51 inserted into the hollow portion 37 b of the shaft guide 37.

On the lower surface of the lock shaft 51,

spring engagement grooves

511 and 512 are formed on the inner side and the front end side in the length direction, and when the lower spring portion 52d is engaged with the

spring engagement grooves

511 and 512, The lock shaft 51 can not be inserted into and removed from the first lock

shaft insertion portions

12 and 42 and the second lock

shaft insertion portions

13 and 43, that is, locked to the lock shaft receiving portion 26 of the core plate 20. The state where the outer surface of the shaft 51 abuts or the state where the abutment state is released is maintained. The depth of the back side spring engagement groove 511 is formed relatively shallow, and the tip side spring engagement groove 512 is formed deeper than that. Further, as shown in FIG. 6C, the tip side spring engagement groove 512 is formed in a substantially right triangle shape in a side view, and one surface 512a closer to the back side spring engagement groove 511 than the groove bottom. Is formed in an inclined surface shape, and the other surface 512b is formed in a surface extending from the groove bottom portion toward the outer surface of the lock shaft 51 at a substantially right angle. For this reason, even if the lock shaft 51 is further moved in the pulling direction in a state where the lower spring portion 52d is engaged with the front end side spring engagement groove 512, the lower spring portion 52d contacts the other surface 512b. However, when the lock shaft 51 is operated in the pushing direction, the lower spring portion 52d relatively moves along one of the inclined surfaces 512a, and from the tip side spring engagement groove 512. You can leave.

The dummy cover 54 is formed in substantially the same shape and size as the release knob 53 and is disposed so as to cover the surface of the release knob 53. The rear end portion 51a of the lock shaft 51 is fixed to the inner surface of the dummy cover 54. The dummy cover 54 is gripped, and the lock shaft 51 is moved to the hollow portion 37b of the shaft guide 37, and further to the first lock. The shaft is inserted into or extracted from the

shaft insertion portions

12 and 42 or the second lock

shaft insertion portions

13 and 43. However, the dummy cover 54 itself is provided so as not to press the release knob 53 so that the release knob 53 can be operated independently in the rotation direction even when the dummy cover 54 is pushed in.

Next, the operation of the armrest 1 of this embodiment will be described. First, as shown in FIGS. 7 and 9A, it is assumed that the armrest 1 is set at the normal use position. In this state, as shown in FIGS. 12 (a), 13 (a), and 14 (a), the stepped portion 211a of the upper end edge 211 of the core plate 20 contacts one stopper portion 10b, and the lower end The wide portion 212b of the edge 212 is in contact with the other stopper portion 10c. Therefore, the load applied to the armrest 1 is distributed and supported by the two

stopper portions

10b and 10c. As shown in FIG. 5, the dummy cover 54 is inserted, and the lock shaft 51 is inserted from the hollow portion 37 b of the shaft guide 37 into the first lock shaft insertion portion 42 of the support disk 40. The tip is inserted into the first locking shaft insertion portion 12 of the base member 10. Further, a portion of the lock shaft 51 located between the first lock shaft insertion portion 42 of the support disk 40 and the first lock shaft insertion portion 12 of the base member 10 is a lock shaft receiver of the core plate 20. It is in contact with the portion 26. In this state, the lower spring portion 52d of the lock spring 52 is engaged with the back spring engagement groove 511 formed on the lower surface of the lock shaft 51 so that it cannot be pulled out. If the armrest 1 is to be rotated upward in this state, the rear inclined surface 26a of the lock shaft receiving portion 26 is pressed against the opposing outer surface of the lock shaft 51, thereby preventing upward rotation. (See FIG. 12 (c)).

When operating the armrest 1 from the normal use position, operate as follows. First, as shown in FIGS. 9B and 10B, only the release knob 53 covered with the dummy cover 54 is moved from the broken line position to the solid line position in the right direction of the figure (FIG. 10B). Direction). As a result, the release knob 53 rotates about the spring support protrusion 36, and the spring end engaging portion 53c rotates rightward. Therefore, in addition to the lock spring 52 engaged with the spring end engaging portion 53c. The end 52c is expanded downward, and the lower spring 52d is disengaged from the back spring engaging groove 511 of the lock shaft 51 (the state shown by the solid line in FIG. 10B and FIG. 11B). Status). As a result, the engagement between the lock shaft 51 and the lock spring 52 is released. In this state, when the dummy cover 54 is viewed from the front, the release knob 53 is displaced in the clockwise direction with respect to the dummy cover 54 (see FIG. 9B).

Next, as shown in FIG. 9 (c), the dummy cover 54 is gripped and pulled outward. The other end portion 52c of the lock spring 52 is always close to the one end portion 52a in the expanded state, that is, the spring force is acting in the closing direction. When reaching the position of the tip side spring engagement groove 512 formed by a groove deeper than 511, as shown in FIGS. 6 (b) and 6 (c), the lower spring portion 52d becomes the tip side spring engagement groove. Fit into 512. Even if the lock shaft 51 is further pulled out in the state of being engaged with the tip side spring engagement groove 512, the lower spring portion 52d abuts on the other surface 512b rising substantially at a right angle, so that the lock shaft 51 cannot be pulled out any further. At the same time, the lower spring portion 52d fits into the front end side spring engaging groove 512, so that the other end portion 52c tries to approach the one end portion 52a. Is rotated to the left of FIG. 10B (from the solid line position in FIG. 10B to the broken line position) to return to the original position. Therefore, in this state, when the dummy cover 54 is viewed from the front, the dummy cover 54 and the release knob 53 have the same rotational direction.

At the stage where the lock spring 52 is engaged with the front end side spring engagement groove 512, as shown in FIG. 6B, the lock shaft 51 includes the first lock shaft insertion portion 12 of the base member 10 and the core plate 20. The locking shaft receiving portion 26 and the first locking shaft insertion portion 42 of the support disk 40 are separated from each other. Accordingly, in this state, the armrest 1 (core plate 20) can be turned upward.

When the armrest 1 is rotated upward, as shown in FIG. 12B, the wide portion 211b closer to the front of the upper end edge 211 of the core plate 20 comes into contact with one stopper portion 10b, and the lower end The operation stops until the step 212a near the rear of the edge 212 abuts against the other stopper 10c. Since the release knob 53 is engaged with the shaft guide 37 and the spring support protrusion 36 via the lock spring 52, the release knob 53 rotates together with the cover member 30 and the core plate 20. The same applies to the lock shaft 51 and the dummy cover 54 engaged with the release knob 53 via the lock spring 52. The dummy cover 54 and the release knob 53 are similar to those shown in FIGS. ), The orientation is rotated approximately 90 degrees from the normal use position. On the other hand, the base member 10 and the support disk 40 are fixed without rotating.
Therefore, in the flip-up position, the lock shaft receiving portion 26 of the core plate 20 is in a communication position corresponding to the second lock

shaft insertion portions

13 and 43, and the lock shaft 51 is positioned on the extension line thereof. become. Next, when the dummy cover 54 is pushed so as to change from the state of FIG. 9D to the state of FIG. 9E, one surface 512a of the tip side spring engagement groove 512 of the lock shaft 51 is inclined. For this reason, the lower spring portion 52d is relatively moved along the one surface 512a and separated, and the lock shaft 51 is pushed in.

Thereby, as shown in FIG. 14B, the lock shaft 51 is inserted into the second lock shaft insertion portion 43 of the support disk 40, and is engaged with the lock shaft receiving portion 26 of the core plate 20, Further, the second locking shaft insertion portion 13 of the base member 10 is inserted. As a result, even if a force for rotating the armrest 1 forward is inadvertently applied, the front inclined surface 26b of the lock shaft receiving portion 26 is pressed against the opposing outer surface of the lock shaft 51, thereby preventing forward rotation. Then, the armrest 1 is held at the flip-up position (see FIG. 12D). In addition, since the core plate 20 is held in contact with the one stopper portion 10b and the other stopper portion 10c even at the flip-up position, the load applied to the armrest 1 at the flip-up position is also reduced by the two stopper portions 10b. , 10c.

As described above, the core plate 20 is covered with the cover member 30 by integral molding except for the surface facing the base member 10. In addition, a protruding piece 32 that protrudes outward along the peripheral edge of the plate covering portion 31 is provided. This protruding piece 32 is located near the base end portion 21 of the core plate 20 as shown in FIG. When the armrest 1 is viewed from the upper surface in the normal posture position, the armrest 1 is projected to cover at least a part of the upper surface and the lower surface of the base member 10. Therefore, the clothes and fingers of the operator are prevented from entering the gap. In addition, since the load is applied by the two

stopper portions

10b and 10c provided on the base member 10 in both the normal use position and the flip-up position, there are no parts that have jumped out of the cover member 30. In that sense, it is highly effective in preventing clothes and fingers from being caught. In addition, a member for receiving a load and a mechanism for rotating are arranged in the interior covered with the cover member 30, and there is no need for a separate stay for receiving the load as in the prior art. In addition, since it is not necessary to provide a mechanism for preventing pinching of clothes and fingers that are separately required by arranging them, the structure is simple and the weight is reduced, which contributes to the reduction of the manufacturing cost.

In the above description, the present invention is applied to passenger seats in an aircraft. However, the present invention is not limited to this, and can be applied as armrests in various vehicle seats such as trains, ships, and buses.

DESCRIPTION OF SYMBOLS 1 Armrest 10 Base member 10a

Hollow shaft part

10b, 10c Stopper part 12 First lock shaft insertion part 13 Second lock shaft insertion part 20 Core plate 21 Base end part 30 Cover member 31 Plate covering part 32 Projection piece 36 Spring support Projection 37 Shaft guide 40 Support disk 40a Bolt insertion hole 42 First locking shaft insertion portion 43 Second locking shaft insertion portion 50 Lock mechanism 51 Lock shaft 52 Lock spring 53 Release knob 54 Dummy cover 100 Seat 110 Seat back portion 111 Side flame

Claims

An armrest provided on the mounting target portion so as to be rotatable in a range between a normal use position and a flip-up position,
A base member attached to the attachment target part;
A core plate of a predetermined length whose base end is pivotally supported by the base member;
A substantially I-shaped cross section having a plate covering portion that covers the core plate except for a surface facing the base member at a base end portion of the core plate, and a protruding piece that protrudes outward from a peripheral edge of the plate covering portion. And a synthetic resin cover member that is molded integrally with the core plate,
In the base member, the core plate protrudes from the upper end edge side and the lower end edge side of the base end portion of the core plate with the rotation center of the core plate interposed therebetween, and the core plate is in both the normal use position and the flip-up position. And a pair of stopper portions that both disperse and bear the load applied to the core plate.
In the cover member, it is laminated on the surface opposite to the surface facing the base member at the base end of the core plate, and supports the base end of the core plate together with the base member, and The armrest according to claim 1, further comprising a support disk having stopper portion insertion holes through which the ends of the pair of stopper portions are inserted.
A locking mechanism for locking at the normal use position and the flip-up position of the core plate,
A lock shaft that abuts on a lock shaft receiving portion formed on the core plate and restricts rotation of the core plate in the normal use position or the flip-up position;
A lock spring that engages with the lock shaft and maintains a state of contacting or releasing the contact with the lock shaft receiving portion;
The lock spring biases the lock spring in a direction to engage the lock shaft, and releases the engagement of the lock spring to the lock shaft by moving against the biasing force. When,
3. A lock mechanism that covers the release knob and includes a dummy cover for performing a contact operation of the lock shaft to the lock shaft receiving portion or a release operation of the contact state. Armrest.
The armrest according to any one of claims 1 to 3, wherein the pair of stopper portions are provided at symmetrical positions with respect to the rotation center of the core plate in the base member.
The armrest according to any one of claims 1 to 4, wherein the base member is attached to a side frame of a seat back portion as the attachment target portion.
A seat having a seat back portion and a seat cushion portion,
The seat according to any one of claims 1 to 4, wherein the armrest is provided by attaching a base member to a side frame of the seat back portion.