JPH0520930U - Retractable seat armrest structure - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent the armrest from tilting forward due to the action of a load from above. [Structure] An elongated hole-shaped guide hole 48 for ensuring a shift of a swing locus between the seatback frame 26 and the link 42 is formed in a support arm 40 of the armrest 18. Guide hole
The seat 48 is formed by positioning the front end 48a in front of the pivot point 44 on the seat cushion side in the standing position of the seat back 16. The other end of the link 42, which is pivotally attached at one end to the bracket 24 of the seat cushion 14, is rotatably and slidably attached to the guide hole 48 by the connecting pin 50.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an armrest structure for a retractable seat that is folded and stored in a hangar when not in use and is pulled out and used as needed.

[0002]

[Prior Art]

 For example, when not in use, a retractable seat that can be stored in a predetermined hangar by folding a seat cushion, a seat back, etc. is provided as a passenger seat for a sightseeing bus or an auxiliary seat that can be added to a passage.

The seat cushion and the seat back of the retractable seat are connected by, for example, a hinge, and the seat back can be tilted forward with respect to the seat cushion, that is, can be folded. Then, one side end of the seat cushion is rotatably attached to the opening side of the hangar via a predetermined link mechanism or the like, and the seat cushion is flipped up to the side with a folded seat back. The retractable seat can be stored in the hangar.

Here, in such a retractable seat, for example, a configuration is known in which a foldable armrest that interlocks with the swing of the seatback is provided on the side facing the hangar. Such an armrest is swingably attached to the seatback, for example, by pivotally attaching a rear end to the seatback frame, and a link having a swing locus different from the swing locus of the seatback frame is used. It is held in a nearly horizontal use position.

In such a structure, for example, by leaving play at the pivotal attachment point between the armrest and the link that can absorb the deviation of the swing locus between the seatback frame and the link, , The deviation of the swing trajectory of the link is guaranteed. And, by guaranteeing the deviation of the swing trajectory between the seat back frame and the link, the swing of both the seat back frame and the link is secured, and the seat back with respect to the seat cushion and the armrest can be tilted forward, that is, folded. It is said.

When the armrest is used, the seated person's arm is usually placed on the rear half of the armrest, and the load from the seated person's arm causes the seatback frame to fall backward and the link mechanism to move forward. Each acts to defeat. Therefore, during normal use, the seated person's arm can be supported with sufficient supporting force, and the stability of the seated posture is secured.

[0007]

[Problems to be solved by the device]

 By the way, in such retractable seats equipped with armrests, a seated person often puts his / her hand on the armrest and leans on the armrest while sitting down. In such a case, since the seated person usually touches the front half of the armrest, especially the front end, the load from the seated person when the passenger is seated on or off is excessive so that both the seat back frame and the link are tilted forward. It acts on the arm rest as a simple load.

[0008] Normally, the forward tilt of the seat back frame is prevented by the link. However, in the known configuration, the play that guarantees the deviation of the swinging locus is left at the pivotal connection point between the armrest and the link, so if the seatback frame is tilted forward under an excessive load, the link will not move. No longer supported, the links tend to tip forward with the seat back frame.

Therefore, when the seated person puts his / her hand on the armrest when the passenger is seated on / off, the seatback and the armrest may unexpectedly fall forward, which is not preferable for safety.

An object of the present invention is to provide an armrest structure for a retractable seat that prevents the armrest from tilting forward due to the action of a load from above.

[0011]

[Means for Solving the Problems]

 In order to achieve this object, according to the present invention, the long hole that ensures the deviation between the swing trajectory of the seat back frame centering on the hinge and the swing trajectory of the link centering on the pivot point of the seat cushion side. -Shaped guide hole is formed. The guide hole is formed on the side of the armrest so as to extend in the longitudinal direction with the front end located in front of the pivot point of the seat cushion side in the upright position of the seatback. Then, the other end of the link, one end of which is pivotally attached to the seat cushion side, is rotatably and slidably attached to the guide hole by the connecting pin.

[0012]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

As shown in FIGS. 1 and 2, in a retractable seat armrest structure 10 according to the present invention, the retractable seat 12 includes a seatback 16 and an armrest 18 that are foldable with respect to a seat cushion 14. However, it can be stored in the hangar 20 by raising the seat cushion.

As can be seen from FIG. 2, the hangar 20 is formed as a recess having a side opening on a side surface 22 of a fixed seat such as a sightseeing bus, and is lifted to the side to enter the hangar. A seat cushion 14 is rotatably attached to the opening side of the hangar via a predetermined link mechanism (not shown) so as to be stored.

As shown in FIGS. 1 and 2, the seat cushion 14 is formed, for example, by having a pair of protruding brackets 24 on the upper surface of the rear end, and the seatback 16 is attached to the brackets. A lower end of the seat back frame 26 is attached to a seat cushion so as to be able to be tilted forward, that is, foldable, by a hinge 28 formed of a stepped bolt or the like. The seat back 16 is configured to be swingable in the front-rear direction with respect to the seat cushion 14 between a seated position (an upright position) that secures a normal seated posture of a seated person and a forward tilted position when folded. ..

It should be noted that the seat cushion 14 and the seat back 16 of the retractable seat have a known structure, and it is sufficient if the seat back is foldable with respect to the seat cushion, and the structure itself is of the present invention. Since it is not the purpose, it will not be described in detail.

As can be seen from FIG. 3 in addition to FIG. 1, for example, the bracket 30 is fixed to the seat back frame 26 by welding or the like, and the extension pin 32 extended from the bracket is attached to the rear end of the armrest 18. However, it is attached to the seat back frame so as to be vertically rotatable and non-separable. The armrest 18 can be swung, for example, between a use position that is substantially horizontal when the seat back 14 is upright and a storage position that is substantially parallel to the seat back frame 26.

The armrest 18 is formed, for example, by having a stepped bolt-shaped projecting pin 34 in front of a pivotal point (extension pin) 32 of the seatback frame 26, and a spring washer 36. The support arm 40 is attached to the protruding pin, that is, to the side of the armrest by screwing the nut 38 onto the protruding pin. The support arm 40 is, for example, bent and formed into a shape having a support piece 40a for supporting the armrest 18 from below at the lower end. As the nut 38, for example, a cap nut that prevents the protruding pin 34 from protruding and being exposed from the nut may be used.

Then, one end of the link 42 is pivotally attached to the bracket 24 of the seat cushion by, for example, a stepped bolt 44 and a nut 46, and the other end of the link is attached to the armrest 18 via the support arm 40. The link is installed between the seat cushion 14 and the armrest.

As can be seen from FIGS. 1 and 3, the support arm 40 is formed with a guide hole 48 having a long hole extending in the longitudinal direction, and the support pin 40 has a connecting pin via a collar 49. By inserting 50, the link 42 is attached to the guide hole so as to be rotatable and slidable along the guide hole. As the connecting pin 50, for example, a rivet can be used, and the link is rotatably and slidably connected to the support arm by caulking at the tip of the rivet after continuously inserting both the support arm 40 and the link 42. It

In such a configuration, the stepped bolt 44 serves as a pivot point between the seat cushion 14 and the link 42, and the rivet (connecting pin) 50 serves as a pivot point between the armrest 18 and the link, so that the link is seated. The cushion and armrest can be swung. Then, by the sliding of the rivet 50 in the guide hole, the deviation of the swing locus of the link 42 around the pivot point 44 with respect to the swing locus of the seat back frame 26 around the hinge 28 is guaranteed, Both the seat back frame and the link are swingable with respect to the seat cushion 14.

In the embodiment, the link 42 is pivotally attached to the bracket 24 of the seat cushion and the support arm 40 of the armrest by the stepped bolt 44, the rivet 50, etc., but the present invention is not limited to this. The link may be pivotally attached to the bracket and the support arm by means of.

As can be seen from FIG. 1, the guide hole 48 allows the front end 48a to be pivotally attached to the seat cushion side so that the forward tilted state of the link 42 can be maintained in the standing position of the seat back 16. It is formed by being positioned in front of the point (step bolt) 44.

As shown in FIG. 1, in the standing position of the seat back 16, the rivet 50 at the upper end of the link is in contact with the guide hole front end 48a of the support arm. In such a state, since the rivet 50 is located in front of the pivot point 44 on the seat cushion side of the link 42, the link is tilted forward and the rivet is loaded by the load from above due to the weight of the armrest 18 or the like. It is pressed against the front end 48a of the guide hole.

When the rivet 50 is located at the front end 48a of the guide hole, the swing trajectory between the seat back frame 26 and the link 42 is deviated, so that the seat back frame and the link do not swing. Then, since the rivet 50 is pressed against the front end 48a of the guide hole by the load from above, the deviation of the swing track between the seatback frame 26 and the link 42 is not guaranteed, and the front half of the armrest 18 is not guaranteed. Even if an excessive load F acts on the seat back frame and the link, the standing position of the seat back 16 and the use position of the armrest are secured under the deviation of the swing locus between the links.

Therefore, even if a seated person puts his / her hand on the front half of the armrest 18 or the like and takes up or leaves the seat, the seatback frame 26 and the link 42 do not swing, and the seatback 16 and the armrest are suddenly moved. The forward tilt is surely prevented. Therefore, the safety of the seated person is sufficiently ensured when the user is seated away.

Further, when the armrest 18 is used, the link 42 functions to prevent the seat back 16 from tilting forward, so that the link functions as a seat back stopper. Therefore, in the upright position, the seat back 16 is prevented from unexpectedly falling forward, and the safety of the seated person at the time of sitting can be sufficiently ensured.

When the armrest 18 in the use position shown in FIG. 1 is pulled up and rocked counterclockwise around the extension pin 32, a rivet to the guide hole front end 48a is loaded under a load from above. Pressing of 50 is released. Then, when the seat back 16 is tilted forward together with the armrest 18 from such a state, the deviation of the swing locus between the seat back frame 26 and the link 42 is guaranteed by the rearward sliding of the rivet 50 in the guide hole. Therefore, as shown in FIG. 4, the seat back and the armrest can be folded.

In such a state, for example, when the seat cushion 14 is flipped up to the side, the retractable seat 12 in which the seat back 16 and the armrest 18 are folded is stored in the storage case 20.

Further, if the retractable seat 12 stored in the hangar 20 is pulled out and the seatback 16 is raised in the standing direction from the state shown in FIG. 4, the armrest 18 swings to the seatback. Followed and pulled up. When the seat back 16 and the armrest 18 are pulled up, the link 42 swings and the rivet 50 at the upper end of the link comes into contact with the front end 48a of the guide hole, so that the movement of the link with respect to the seat cushion 14 and the armrest is prevented. It is stopped and the standing position of the seat back and the use position of the armrest are set.

That is, the folding of the seat back 16 and the armrest 18 is performed by pulling up the armrest, and the seating position is set by pulling up the seatback. Therefore, the setting operation at each operation can be simplified, and the operability of the retractable seat 12 is not complicated.

Here, in the embodiment, the link 42 is attached to the arm rest 18 via the support arm 40, but the present invention is not limited to this, and the link 42 is attached directly to the side of the armrest. Good. However, if the link 42 is attached to the side of the armrest 18 via the support arm 40, the support arm swings in synchronism with the swing of the armrest and the link, so the swing of the armrest and the link. The orientation of the guide hole 48 depending on the angle can be easily obtained.

Therefore, the swing locus between the seat back frame 26 and the link 42 can be smoothly and smoothly ensured, and the smooth folding and raising operation of the retractable seat 12 can be ensured. The operability of the retractable seat is improved.

Further, in the embodiment, the guide hole 48 is provided in the support arm 40 on the armrest side, and the seat back frame 26 and the swing locus between the links are provided at the pivot point 50 between the link 42 and the support arm 40. The gap is guaranteed. However, the present invention is not limited to this, and for example, the bracket 24 on the seat cushion side is provided with a long hole-shaped guide hole having the rear end positioned rearward from the pivot point 50 at the standing position of the seat back 16, At the pivot point 44 between the link 42 and the bracket, it is also possible to ensure the displacement of the swing locus between the seatback frame 26 and the link. In this case, the pivot point 44 on the seat cushion side is brought into contact with and locked to the rear end of the guide hole to prevent the seat back 16 and the armrest 18 from falling forward.

Further, without providing a guide hole, only the swing of the link 42 with respect to the seat cushion 14 and the armrest 18 and the swing of the support arm 40 with respect to the armrest cause the swing between the seatback frame 26 and the link 42. It may be configured so as to guarantee the deviation of the trajectory. In this case, the support arm 40 swings around the projecting pin 34, so that the deviation of the locus between the seatback frame 26 and the link 42 is guaranteed.

In such a structure, when the seat back 16 and the armrest 18 are folded, the support arm 40 and the link 42 project downward, that is, in the seat cushion direction. A predetermined recess is formed.

Further, in the embodiment, the connecting pin 50 is inserted into the guide hole 48 via the collar 49, but the present invention is not limited to this, and the connecting pin may be directly inserted into the guide hole without using the collar. It may be configured to be inserted into. However, if the collar 49 is interposed between the connecting pin 50 and the guide hole 48, the frictional force between the connecting pin and the guide hole is sufficiently suppressed, so that the connecting pin slides smoothly in the guide hole, that is, the seat back. 16, the armrest 18 can be smoothly moved forward and fully raised.

Although the retractable seat armrest structure of the present invention is most suitable for a retractable seat to be installed as a passenger seat of a sightseeing bus, an auxiliary seat, etc., the retractable seat armrest structure is not limited to this. As far as the seat is concerned, the invention may be applied to other various types of automobiles, trains, airplanes, ships, and other retractable seats.

The above-described embodiments are for explaining the present invention, and do not limit the present invention in any way, and all the modifications and alterations made within the technical scope of the present invention are also applicable. Needless to say, it is included in the device.

[0040]

[Effect of the device]

 As described above, according to the armrest structure of the retractable seat according to the present invention, the link can be swung by the connecting pin in the elongated guide hole provided on either the armrest side or the seat cushion side. It is also slidably mounted. When the seat back is in the upright position, the link pin is locked at the front end or the rear end of the guide hole to prevent movement of the link, and the seat back frame and the link are not displaced due to the swing trajectory between the links. , The armrest is prevented from falling forward.

Therefore, even if an excessive load acts on the armrest, the seatback and the armrest do not tilt forward, and it is possible to sufficiently secure the safety of a seated person who holds his / her hand on the armrest when taking a seat.

Further, at the use position of the armrest, the link acts as a stopper, so that the seat back is prevented from inadvertently leaning forward. Therefore, the seat back does not unexpectedly fall forward, and the safety of the seated person is secured in this respect as well.

Further, the sliding of the pivoting point of the link with respect to either the seat cushion or the armrest guarantees the deviation of the swinging trajectory between the seatback frame and the link, so that the link can be folded when the seatback and the armrest are folded. The support arm does not project to the seat cushion side. Therefore, it is not necessary to provide a recess in the seat cushion, and the overall appearance quality of the retractable seat is not deteriorated.

In the configuration in which the link is attached to the armrest via the support arm pivotally attached to one end of the armrest, the support arm swings in conjunction with the swinging of the armrest and the link. The orientation of the guide hole can be easily obtained according to the swing angle of the. Therefore, the swing locus between the seat back frame and the link can be smoothly and comfortably ensured, and the smooth folding and pulling up operation of the retractable seat ensures the operability of the retractable seat from this point as well. Be improved.

Further, in the configuration in which the connecting pin is inserted into the guide hole via the collar, the frictional force between the connecting pin and the guide hole is sufficiently suppressed, so that a smooth sliding of the connecting pin in the guide hole, In other words, the seat back and armrests can be smoothly tilted forward and the triggering action can be sufficiently secured.

[Brief description of drawings]

FIG. 1 is a front view of a retractable seat armrest structure according to the present invention in an armrest use position.

FIG. 2 is a schematic perspective view of a retractable seat to which an armrest is attached.

FIG. 3 is a schematic exploded perspective view of an armrest structure of a retractable seat.

FIG. 4 is a schematic front view of the armrest structure of the retractable seat when the seatback and the armrest are folded.

[Explanation of symbols]

 10 Retractable seat armrest structure 12 Retractable seat 14 Seat cushion 16 Seatback 18 Armrest 20 Hangar 28 Hinge 40 Support arm 42 Link 44 Stepped bolt (pivot point) 48 Guide hole 48a Guide hole front end 50 Rivet (connecting pin) , Pivot point)

Claims (6)

[Scope of utility model registration request] 1. An armrest structure for a retractable seat in which a rear end of an armrest pivotally attached to a seatback frame is erected between a seat cushion and is foldably supported by a pivotally attached link. The long guide hole that secures the deviation between the swing trajectory of the seat back frame and the swing trajectory of the link centered on the pivot point of the seat cushion side is provided on the seat cushion side at the upright position of the seat back. The front end is located in front of the pivot point and is formed to extend in the longitudinal direction on the side of the armrest, and the other end of the link pivotally attached to the seat cushion side can be pivoted into the guide hole by the connecting pin. The armrest structure of the retractable seat is characterized by being slidably attached. 2. The guide hole to which the link is attached is formed in the support arm, and the link is attached to the side of the thermrest through the support arm by pivotally attaching one end of the support arm to the side of the armrest. Armrest structure of the retractable seat described. 3. An armrest structure for a retractable seat, wherein an armrest pivotally attached to a rear end of a seatback frame is erected between a seat cushion and a foldable support by a pivotally attached link. The long guide holes that secure the gap between the swing trajectory of the seat back frame and the swing trajectory of the link centering on the pivot point of the armrest side are attached to the armrest side when the seatback is upright. The rear end is located rearward of the point, and is formed in the longitudinal direction continuously at the pivot point of the seat cushion and the link, and the other end of the link pivotally attached at one end to the armrest side is guided by the connecting pin. An armrest structure for a retractable seat, which is attached to the hole so as to be rotatable and slidable. 4. The retractable seat armrest structure according to claim 3, wherein the link is attached to the armrest via an armrest pivotally attached to one end of a side of the armrest. 5. The retractable seat armrest structure according to claim 1, wherein the connecting pin is inserted into the guide hole through a collar. 6. A retractable seat armrest structure in which a rear end of an armrest pivotally attached to a seatback frame is erected between a seat cushion and is foldably supported by a pivotally attached link. One end of the support arm having a long hole-shaped guide hole is pivotally attached to the side of the armrest, and the other end of the link pivotally attached at one end to the seat cushion is
An armrest structure for a retractable seat, which is rotatably attached to a guide hole of a support arm by a connecting pin.