JPH0558464U - Seat retractable footrest structure - Google Patents

Abstract

(57) [Summary] [Purpose] The support height of the footrest can be adjusted without changing the support angle to improve the comfort of the seated person. [Composition] The footrest 12 is a support position at the free end of the parallel link 18 pivotally attached to the support bracket 24 at the base end,
It is swingably pivoted between the storage positions and is provided so as to be capable of substantially parallel movement in the vertical direction. The support height of the footrest 12 can be adjusted by locking the parallel link 18 at a predetermined swing angle by the locking means 42 having a plurality of locking positions.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a retractable footrest structure for a seat, which is provided at the rear end of the front seat of the seat to be retractable.

[0002]

[Prior Art]

 For example, footrests that support the feet of occupants are attached to the seats of sightseeing buses and long-distance buses. As such a footrest, for example, a configuration is known that is provided so as to be retractable at a rear end portion of a front seat of the sheet.

Such a so-called retractable footrest is, for example, attached to a bracket provided at the rear end portion of the front seat so as to be able to jump up by a hinge or the like, and the jumping position is set as the retracted position of the footrest. There is.

In such a retractable footrest, for example, the toggle effect of the biasing means is used to hold the footrest in the support position and the storage position. In other words, when the biasing means swings from the predetermined toggle point toward the storage position as the footrest jumps up from the supporting position, the footrest is biased toward the storage position under the biasing force of the biasing means. And is held in the storage position.

Further, when the footrest in the retracted position is swung in the support position direction against the biasing force of the biasing means and the footrest crosses the toggle point of the biasing means, the biasing means biases the footrest in the supporting position direction. , The footrest is held in the supporting position under biasing force.

[0006]

[Problems to be solved by the device]

 However, in the known retractable footrest structure, since the footrest is swung and held only by the toggle action of the biasing means, the set position of the footrest is limited to the support position and the retracted position.

That is, since the set height of the footrest at the supporting position is always constant, it is not possible to set the height according to the seated person's body shape, taste, and the like. Therefore, the sitting posture according to the body shape and taste of the seated person cannot be easily obtained, which may give the seated person a discomfort and reduce the comfortability of the seated person.

[0008] Here, it is conceivable that the height of the footrest is adjusted by locking and holding the footrest at a predetermined swing angle by a locking means or the like. However, in such a configuration, since the support angle of the footrest at the support position changes depending on the height of the footrest, the height of the footrest may impose an unnatural posture on the seated person.

An object of the present invention is to provide a retractable footrest structure for a seat that can adjust the support height of a footrest without changing the support angle and improve the comfort of a seated person.

[0010]

[Means for Solving the Problems]

 To this end, according to the invention, a footrest can be swung between a supporting position and a retracting position on a free end of a parallel link pivotally attached to a base bracket of a seat frame. It is pivotally attached to and is provided so as to be movable in parallel in the vertical direction. Then, the supporting height of the footrest can be adjusted by locking the parallel link at a predetermined swing angle by the locking means having a plurality of locking positions.

[0011]

【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 footrest structure 10 for a seat according to the present invention, a footrest 12 is provided at a rear end portion of a front seat 16 arranged in front of the seat 14. , Are attached via parallel links 18.

As can be seen from FIG. 3 in addition to FIG. 1, the parallel link 18 has, for example, a first link arm 18a and a second link arm 18b arranged in parallel, and The proximal end is pivotally attached to the support bracket 24 by pivot pins 20,21. The free ends of the first and second link arms 18a and 18b are linked by a third link arm 18c pivotally attached by pivot pins 26 and 27 so as to be interlocked.

Then, the front end (left side in the figure) of the footrest 12 having the side brackets 30 on the left and right sides is connected to the first and third link arms by the pivot pin 26 at the free end of the first link arm 18a. It is pivotally attached with 18a and 18c.

As can be seen from FIGS. 1 and 3, for example, an engaging piece 32 that engages with the upper end surface of the side bracket 30 of the footrest to set the footrest 12 at a predetermined support angle. Is integrally formed to form a third link arm 18c. In such a configuration, the swinging of the first and second link arms 18a and 18b about the pivot pins 20 and 21 at the base ends causes the third link arm 18c, that is, the footrest 12, to move to the support bracket. Translate to 24.

As described above, the support bracket 24 to which the footrest 12 is attached via the parallel link 18 is fixed to the base bracket 40 of the seat frame 38 by the attachment bolt 34 and the nut 36, and the footrest is attached to the base. The bracket, that is, the front seat 16 is configured to be movable in parallel in the vertical direction.

Here, in the retractable footrest structure 10 of the present invention, the parallel link 18 is configured to have the locking means 42 capable of locking the parallel link 18 at a predetermined swing angle.

As shown in FIGS. 1 and 3, the lock means 42 has, for example, three teeth formed on the proximal end side of the first link arm 18a having three lock grooves 44a-1 to 44a-3. It comprises a portion 44 and a lock plate 46 having a lock claw 46a engageable with the lock groove 44a of the tooth portion.

The lock plate 46 is pivotally attached to the support bracket 24 by a pivot pin 47 at a position corresponding to the tooth portion 44 of the first link arm 18 a, and the lock pawl 46 a is attached by the biasing means 48. It is biased in the engagement direction with the tooth portion 44. As the biasing means 48, for example, a tension coil spring stretched between a locking piece 50 formed on the lock plate 46 on the opposite side of the lock claw 46a and a locking piece 52 of the support bracket can be used.

In such a configuration, the lock claw 46a is engaged with the lock groove 44a of the tooth portion 44 by the rotation of the lock plate 46 under the biasing force of the tension coil spring (biasing means) 48, By locking the first link arm 18a, that is, the parallel link 18 at a predetermined swing angle, the height of the footrest 12 corresponding to the position of the lock groove is set.

For example, as shown in FIG. 1, the lowest support position set by the engagement of the lock claw 46a with the lock groove 44a-1 of the tooth portion is the first support position of the footrest 12, and the first support position Is the initial position of the footrest and locking means 42. As can be seen from FIG. 2 in addition to FIG. 1, from this state, for example, by using the grip hole 53 formed at the rear end portion (right side in the figure) of the footrest 12, the seat When a person sitting on 14 lifts the footrest 12 while pulling it in the direction of the arrow, the footrest moves upward in parallel with the swinging of the horizontal link 18 in the counterclockwise direction.

Then, the swing of the parallel link 18 causes the lock claw 46a to leave the lock groove 44a-1, and the lock plate 46 is pulled along the slope of the mountain portion 44b-2 adjacent to the lock groove 44a-1. The first link arm 18a, that is, the parallel link 18 is swung while swinging against the biasing force of the tension coil spring 48.

Then, when the lock claw 46a of the lock plate crosses the crest 44b-2 as the parallel link 18 swings, the lock claw receives the biasing force of the tension coil spring 48 as shown in FIG. Originally, it is engaged with the lock groove 44a-2 and the parallel link is locked at the swing angle corresponding to the lock groove 44a-2, so that the second support position of the footrest 12, that is, the intermediate support position is set.

Similarly, in the second support position of the footrest 12 shown in FIG. 4, when the seated person pulls the footrest while pulling it up in the direction of the solid line arrow, the parallel link 18 in the counterclockwise direction is moved. The swinging causes the lock claw 46a to be separated from the lock groove 44a-2. Then, when the parallel link 18 swings, the lock claw 46a goes over the mountain portion 44b-3 and is engaged with the lock groove 44a-3 under the biasing force of the tension coil spring 48. The third support position of the footrest 12, that is, the uppermost support position, is shown by the solid line.

Here, when the footrest 12 is jumped up from the third supporting position as shown by the two-dot chain line in FIG. 5, the footrest 12 is pivoted without swinging the parallel link 18. Is swung around and stored in the storage position indicated by the chain double-dashed line.

In this structure, the footrest 12 is supported by the toggle action of a biasing step (not shown) stretched between the side bracket 30 of the footrest and the third link arm 18c of the parallel link. It is held at each storage position. However, a structure for holding the footrest 12 in the supporting position and the retracted position is known, and the structure itself is not the gist of the present invention, and will not be described in detail.

Further, when the footrest is lifted while being pulled again at the third supporting position of the footrest 12 shown by the solid line in FIG. 5, the parallel link 18 further swings counterclockwise, and the first link arm 18a By the release piece 54 provided adjacent to the tooth portion 44 on the proximal side, the lock plate 46 pivots clockwise around the pivot pin 47, and as shown in FIG. Separates from the lock groove 44a-3.

Here, as shown in FIG. 6, in the present invention, the holding member 56 is configured to be able to hold the unlocked state of the lock plate 46. As the holding member 56, for example, a leaf spring having one end fixed to the locking piece 52 of the support bracket 24 can be used, and the leaf spring engages with the engagement piece 46b of the lock plate 46 when the lock plate 46 is unlocked. It is made possible.

For example, as shown in FIGS. 1, 4 and 5, when the lock groove 44a and the lock claw 46a are engaged, the leaf spring (holding member) 56 is placed on the upper surface of the lock plate engagement piece 46b. The lock plate 46 is allowed to rotate without engaging with the engaging piece. Then, for example, as shown in FIG. 6, when the lock plate 46 rotates due to the pressing of the release piece 54, the engagement piece 46b of the lock plate is positioned to the right of the leaf spring 56 in the figure, the lock is generated. Since the engaging piece 46b is engaged with the leaf spring with the claw 46a and the lock groove 44a separated from each other, the unlocked state of the lock plate 46 is maintained.

Then, the first link arm 18a, that is, the parallel link 18, becomes free, and the traction force of the footrest 12 is released, whereby the parallel link swings clockwise under its own weight and the footrest moves downward. Translate to.

Here, according to the present invention, as shown in FIGS. 6 and 7, the tooth crests 44b-1 are formed to have a length that allows engagement with the lock claws 46a in the unlocked state. There is. That is, when the horizontal link 18 swings clockwise and the crest 44b-1 engages with the lock claw 46a of the lock plate, the lock claw, that is, the lock plate 46 is pressed counterclockwise. Then, since the lock plate 46 rotates against the elasticity of the leaf spring 56, the engagement between the leaf spring and the engaging piece 46b, that is, the holding of the lock plate in the unlocked state is released, and the lock plate 46 is released. Is biased again under the biasing force of the tension coil spring 48, and is returned to the initial state shown in FIG.

That is, in this invention, the first, second, and third support positions can be changed only by the pulling operation of the footrest 12 using the grip hole 53. Then, for example, when the footrest 12 is jumped up in the third support position, the retracted position of the footrest is set.

As described above, according to the retractable footrest structure 10 for a seat of the present invention, the parallel link 18 allows the footrest 12 to move in parallel, and the locking means 42 having a plurality of locking positions causes the parallel link to move. It can be locked at multiple swing angles. That is, by locking the parallel link 18 by the locking means 42, the supporting height of the footrest 12 can be adjusted without changing the supporting angle of the footrest 12.

Therefore, the height of the footrest according to the body shape and taste of the seated person can be easily set under a constant support angle, and the seated person's comfort is not felt. Is sufficiently improved.

The combination of the parallel link 18 and the locking means 42 ensures the horizontal movement of the footrest 12 and the height adjustment in the parallel state, so that the structure of the retractable footrest structure 10 is not complicated. ..

Further, according to the locking means 42 having such a configuration, the swinging of the parallel link 18 accompanying the pulling operation of the footrest 12 causes the stepwise movement of the lock position and the unlocking operation to be a series of operations. Under the hood, it's easy Therefore, the retractable footrest structure 10 having excellent operability can be obtained without complicating the setting operation of the footrest 12.

Here, in the embodiment, the tooth portion 44 of the locking means is provided on the first link arm 18a of the parallel link 18, but the invention is not limited to this, and for example, the tooth portion may be the second link arm 18b. The lock plate 46 may be provided at the base of the above and the lock plate 46 may be provided at the corresponding position. However, if the tooth portion 44 is provided at the base portion of the first link arm 18a as in the embodiment, the lock means 42 does not become large.

Further, in the embodiment, the biasing means 48 is embodied as a tension coil spring, but the biasing means 48 is not limited to this, and the biasing means 48 may be formed from another spring member such as another compression coil spring or a torsion spring. May be configured.

Further, the holding member 56 is embodied as a leaf spring, but it is not limited to a leaf spring because it is sufficient if it can be elastically engaged with the engaging piece 46b of the lock plate. For example, the holding member may be formed of a synthetic resin plate or the like.

Further, the locking position by the locking means 42 is embodied as the first, second, and third positions, but it is not limited to this because it is sufficient if there are a plurality of positions. There may be four or more locations.

Needless to say, the tooth portion 44, the lock plate 46 and the like are not limited to the illustrated shapes and may have other shapes.

Although the retractable footrest structure for a seat according to the present invention is suitable for a seat for a sightseeing bus, a long-distance bus, etc., it is not limited to this, and for example, for a multipurpose vehicle, electric car, airplane, ship, etc. The invention may be applied to seats or seats in movie theaters, theaters, and the like.

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.

[0044]

[Effect of the device]

 As described above, according to the retractable footrest structure for a seat according to the present invention, the locking of the parallel link at a predetermined swing angle by the locking means does not change the support angle of the footrest, and the footrest is not changed. The support height of can be adjusted. Therefore, the height of the footrest according to the body shape and taste of the seated person can be easily set with a constant support height, without causing discomfort to the seated person and comfort of the seated person. Fully improved.

Since the parallel movement of the footrest and the height adjustment in the parallel state can be ensured by the combination of the parallel link and the locking means, the structure of the retractable footrest structure is not complicated.

Further, the lock claw of the lock plate is engaged with the plurality of lock grooves of the tooth portion under biasing force, and the lock plate pushed up by the release piece is held in the unlocked state by the holding member. Then, due to the swinging of the parallel links accompanying the pulling operation of the footrest, the stepwise movement of the lock position and the unlocking operation can be easily performed under a series of operations. Therefore, a retractable footrest structure with excellent operability can be obtained without complicating the footrest setting operation.

[Brief description of drawings]

FIG. 1 is a schematic front view of a retractable footrest structure for a seat according to the present invention in a first support position (lowermost support position).

FIG. 2 is a schematic side view of a seat on which a retractable footrest is mounted.

FIG. 3 is a schematic exploded perspective view of a retractable footrest structure for a seat.

FIG. 4 is a schematic front view of the seat retractable footrest structure in a second support position (intermediate support position).

FIG. 5 is a schematic front view of the seat retractable footrest structure in a third support position (uppermost support position) and a storage position.

FIG. 6 is a schematic front view of the retractable footrest structure for the seat in the unlocked state at the upper position of the footrest.

FIG. 7 is a schematic front view of the retractable footrest structure for the seat in the unlocked state at the lower position of the footrest.

[Explanation of symbols]

 10 Seat retractable footrest structure 12 Footrest 14 (Applicable) Seat 16 Front seat 18 Parallel link 40 Base bracket 42 Locking means 44 Teeth 44a Lock groove 44b Mountain 46 Lock plate 46a Lock claw 46b Engaging piece 48 Biasing means (pulling) Coil spring) 54 Release piece 56 Holding member (leaf spring)

Claims (3)

[Scope of utility model registration request] 1. A footrest is swingably provided at a front seat rear end portion of the seat so as to be able to support a seated person's foot on the seat at a supporting position, and a footrest is predetermined by a hoisting motion about a hinge. In the retractable footrest structure of the seat stored in the position of, the footrest is pivotally attached to the free end of the parallel link pivotally attached to the base bracket of the seat frame so as to be swingable between the supporting position and the retracting position. The height of support of the footrest can be adjusted by locking the parallel link at a predetermined swing angle by the locking means that is worn and is substantially movable in the vertical direction and has a plurality of locking positions. Characteristic seat retractable footrest structure. 2. A locking means, wherein the locking means has a plurality of locking grooves and is integrally formed on one of the base ends of the parallel link, and a locking claw engageable with at least the locking groove of the teeth of the parallel link. A lock plate pivotally attached to the base bracket of the seat frame, a biasing means for biasing the lock claw of the lock plate in the engagement direction with the tooth portion, and a tooth portion of the parallel link adjacent to the tooth portion. When the parallel link is swung by a predetermined angle or more, the lock plate is pressed to release the engagement between the teeth of the parallel link and the lock claw of the lock plate, and the lock claw locks together. A holding member that engages the engagement piece formed on the plate at the lock release position to hold the lock plate at the lock release position, and locks at a plurality of lock positions. The retractable footrest structure for a seat according to claim 1, wherein the support height of the footrest can be sequentially set by locking the parallel links at the moving angle. 3. The ridge of the end of the tooth portion adjacent to the lock groove corresponding to the lowermost support position of the footrest is formed to be engageable with the lock claw of the lock plate in the unlocked state. A retractable footrest structure for the seat described in 2.