JP2001314263A - Seat for wheeled carriage, chair, or the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat for a wheeled carriage, a chair, or the like. SOLUTION: When a backrest part 12 of this seat 10 is rotated, the center of gravity of a seated person moves, so that there is the danger of the seat 10 being overturned together with a support frame. The movement of the center of gravity is compensated by the movement of a seat face 11 and preferably the backrest part 12 along a horizontal passage to the support frame when the seat back part 12 of the seat 10 is rotated. Accordingly, even if the posture of the backrest person changes from an upright position into a reclining position or conversely, the center-of-gravity position of the person is unchanged to avoid such danger.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to seats such as wheeled cartridges and chairs, in particular according to the preamble of claim 1.

A seat is a wheeled cartridge or carriage for babies, especially a stroller, and also a wheelchair for people with disabilities, especially children and young people with disabilities, Or can be used for chairs. The chair is preferably foldable when not in use so that it can be stored in a space-saving manner (eg, in a car).

[0003]

2. Description of the Prior Art Known seats of the type mentioned at the outset have a rotatable backrest. The backrest can be moved from an upright position, where children and people with reduced mobility adopt a straight sitting position, or a reclined position, where children and young people can lie down, completely or virtually. It is turned. In particular, whenever the seat accommodates a very handicapped young man, the backrest is adjusted from the reclining position to an upright position, the weight of the young man changes the center of gravity of the seated person to a wheeled carriage, chair, etc. Will be noticeable relative to the bottom frame. This movement of the center of gravity creates the risk of turning over wheeled carriages, chairs, etc.

[0004]

SUMMARY OF THE INVENTION Starting from the above points, the present invention eliminates the danger of tipping over a wheeled carriage or chair with seats, in particular children and / or people with disabilities. Build on the purpose of providing seats for

[0005]

A seat for achieving this object has the features of claim 1. The fact that the position of the seat surface changes as the seat back is rotated compensates for the displacement of the center of gravity of the person sitting on the wheeled carriage due to the rotation of the seat back. Therefore, there is almost no movement of the center of gravity of the seated person who would turn over the wheeled carriage, chair or the like.

[0006] The seat is preferably such that the rotation of the backrest is in contact with the seat surface, in particular the backrest preferably along a straight path, the lower frame of a wheeled carriage or of a chair such as, for example, a support frame. Designed to be moved relative to the frame. By this means, if the person sitting on the seat rises from the reclining position to a straight position or vice versa, virtually the entire seat is moved relative to the support frame. The person in question is thereby moved with the seat such that the person's center of gravity is always in the position of the lower frame, the chair frame, where the frame does not turn over.

According to a preferred refinement of the invention, a seat,
In practice, a seat, especially with a seat surface, is preferably mounted on two parallel guide members. The guide member forms a guide passage which preferably extends substantially horizontally. However, these can be slightly tilted down towards the foot of the person sitting on the seat,
Bending the backrest upwards makes it easier to get up.

[0008] A treatment for rotatably connecting the backrest to the seat surface is further provided. This takes place in at least a part of the seat surface, in particular by means of two inclined bearings which are assigned in a fixed manner on opposite sides.
The backrest is pivotally connected to the tilt bearing, in particular by a pivot point, the pivot point of the two spaced-apart tilt bearings, for example, transverse to the direction of movement of the wheeled carriage. Imaginary pivot that extends. The pivotal connection of the backrest to the seating surface allows the entire seat, but preferably at least a portion of the seating surface, to move relative to the support frame. For this purpose, the tilt bearing is movably mounted on the guide member.

According to an advantageous refinement of the invention, the guide member is formed by a base part and a guide passage, the base part being movable in the guide passage in its longitudinal direction. For this purpose, the base part is preferably designed as a sleeve-shaped guide member surrounding the guide passage. The base member also
It also has other functions. For example, the base part has the function of fixing the seat and the guideway to a support frame, for example a wheeled carriage, with the aid of corresponding connecting means. This is caused by another inventive concept which requires separate and independent protection, which allows the seat to be separated from the support frame together with the guideway and the base. As another example, the base part can be used to adjust the distance of the footrest, which is fixed to the guideway, to the back part to adapt the seat depth to children and young people of different sizes.
Perform the function of changing.

[0010] The guide passage may be formed from a preferably linear guide rod. These guide rods are advantageously rigid in all directions. In addition, 1
It is also conceivable to form the guide channel from a chain which is only flexible and elastic in the direction. The rigidity of the chain is sufficient to movably guide the seat, in particular at least a part of the seat surface, in a defined manner. In another direction in which the chain extends perpendicular to the direction of stiffness, the chain is elastic and flexible. This allows the guide passage to be kept relatively short. This is because that part of the passage which is not required to guide the seat at any moment can be removed from the actual guiding passage.

According to a preferred improvement of the seat of the invention,
The backrest is connected to at least one base via a connecting member. It is preferred if at least one connecting member is provided between the backrest and each base. In order to connect the backrest to the seat surface, a special connecting member is connected at a distance from the pivot point of the corresponding tilt bearing. This means that when the backrest is pivoted about the swivel point of the tilt bearing, the connecting member supported by the base moves the tilt bearing together with the pivot point and the lower frame or other supporting frame. The result is that the position of the seat surface with respect to is changed. Since the backrest is connected to the seat surface, the backrest is associated with a change in the position of the seat surface or a part of said seat surface. However, this movement is coupled with the tilting movement of the backrest, resulting in a relative movement between the backrest and the seating surface. This change in position between the backrest and the seating surface causes the seat to adopt a position change, specifically, only on the seating surface, or only on a portion of the seating surface, so that the seat is straightened or reclined. The position of the center of gravity of the person sitting in the state does not change or does not change noticeably with respect to the support frame in the horizontal direction. This avoids the danger of wheeled cartridges, chairs, etc., being overturned when the backrest is pivoted, thereby changing the position of the center of gravity of the person sitting straight or reclining.

According to a preferred improvement of the present invention, each connecting member is attached to the base portion associated with the backrest portion when the seat is folded, that is, when the backrest portion is turned toward the seat surface, a special structure is provided. A coupling member is coupled to intersect orthogonally with the (imaginary) axis of rotation extending through the swivel point of the tilt bearing. This means that one seat
This has the effect that the seat is returned to the opposite side when moved in one direction and when the backrest is completely folded towards the seat surface. The result is that the folded seat takes up particularly little space.

A preferred exemplary embodiment of the seat of the invention is:
This will be described in detail with reference to the accompanying drawings.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A seat 10 of the present invention is shown.
Are seats for wheeled carriages, especially baby carriages, prams or seats for children or young people with disabilities or highchairs for children
It is a seat for such. The seat 10 is, for example, removably fixed to the lower frame of the baby carriage, only part of which is shown only in FIG.

The seat 10 has a seat surface 11 and a backrest portion 12 which are composed of a number of generally horizontal parts. The backrest 12 is connected to the seat surface 11 in such a way that it can move about a horizontal pivot 13. The backrest 12 moves from a slightly inclined seating position (FIG. 4) to a substantially horizontal reclining position (FIG. 6) in which the seating surface 11 and the backrest 12 are Similar to the transport position (FIG. 7), which is folded towards the seat surface 11, it can pivot about the seat surface 11 to the extent that it forms a substantially continuous reclining surface.

The seat 10 further has a substructure 14. This substructure 14 has a base 15 in a sleeve-like design arranged on opposite longitudinal sides of the seat 10. The base portions 15 extend parallel to each other at a small distance below the seat surface 11, and extend substantially horizontally like the seat surface 11. The two base parts 15 on opposite sides of the seat surface 11 are both connected by transverse struts 16 at their front end area and rear end area. These transverse struts 16 are fixed to opposite ends of the base portion 15 and extend parallel to each other at a distance from each other.

Each transverse strut 16 is assigned two latch pawls 17 which are releasable, ie function to latch the seat 10 to the support frame. The support frame can be the lower frame 35 depicted in a schematic manner in FIG. 6, ie by the upper cross section. The seat 10 is thereby connected to the upper part of the lower frame 35. The seat 10 is likewise provided with a lower frame 35 to use it aside, for example to re-use the latch pawl 17 to connect it to the chair frame.
Is released from. The releasable connection of the seat 10 to different support frames is related to an independent inventive idea. In this regard, the idea relates to one advantageous development of the seat 10.

The latching pawl 17 is connected to the base part via a transverse strut 16 below the base part 15. The latch pawl 17 is provided with a transverse strut 16.
Eccentrically mounted. Each identically designed latch pawl 17 has a slightly rectangular latch mouth 36 open on one side. These latch mice 36
The lower frame 3 is latched from
Designed to be pushed into the transverse struts of the 5 or other support frame. The transverse struts are the transverse struts 1 of the substructure 14 of the seat 10.
6 extend in parallel below.

In order to releasably connect the seat 10 to the support frame, in particular to the lower frame 35, another connecting member can be used instead of the latch pawl 17 described above.

A sleeve-shaped base portion 1 which is designed identically
Each of the 5 is assigned a guide rod 18.
The base 15 forms a guide member for the guide rod 18. The guide rod 18 extends oppositely in the longitudinally lower end section of the seat 10 and is movably mounted on the sleeve-like base 15.

At the front end of the line of sight of the person seated in the seat 10 (longitudinal direction of the seat), ie at the front of the seat 10, these ends of the two guide rods 18 are connected to each other by a cross member 19. Connected. This cross member 19 therefore extends perpendicular to the longitudinal axis of the guide rod 18 and serves to secure the pivotable footrest 20 to the substructure 14.
Furthermore, in the illustrated exemplary embodiment, the front part 21 of the seat surface 11 is of a two-part design and is fixed to the crosspiece 19.

The second part of the seat surface 11, namely the rear part 22, is connected to both opposing sides of a corresponding inclined bearing 23. The backrest 12 is rotatably connected to the seat surface 11 via an inclined bearing 23 of the same design.
To this end, each tilt bearing 23 forms a swivel joint 24 between the backrest 12 and the seat surface 11 or the rear 22 of the seat surface 11. Each swivel joint 24 has one swivel point 25, and the swivel points 25 of the two swivel joints 24 of the tilt bearing 23 are opposite opposing sides of the horizontal pivot axis 13 extending across the guide rod 18. Exists.

The two inclined bearings 23 are connected to both base portions 15.
And in the longitudinal direction with respect to the guide rod 18,
For example, it is possible to move in a moving direction of the wheeled carriage that supports the seat 10 and in a direction opposite thereto.
In the process, the tilt bearing 23 is attached to the guide rod 18.
Are guided in the corresponding guide members. In the case of the guide rod 18 shown here, the guide member is formed by a T-shaped groove 26 extending in the longitudinal direction of the guide rod 18. In the exemplary embodiment shown (FIG. 3), each guide rod 18 comprises four identical grooves 26 distributed evenly around its circumference. The corresponding tilt bearing 23 is moved only in one groove 26 of each guide rod 18 by a correspondingly designed guide web 27 of the tilt bearing 23. The remaining groove 26 of the guide rod 18 is not filled. Therefore, it is sufficient if each guide rod 18 comprises a single groove 26. The present invention is not constrained by the illustrated design of guide rod 18 (FIG. 3), since guide rod 18 can have any cross-sectional shape.

The inclined bearing 23 is moved along the guide rod 18 by a guide web 27 of the inclined bearing 23 which is guided in a manner to move longitudinally in a groove 26 extending in the longitudinal direction of the guide rod 18. be able to. Since the inclined bearing 23 is connected to the rear portion 22 of the seat surface 11,
When the tilt bearing 23 is moved, said part of the seat surface 11 formed by the rear part 22 is pushed and retracted in the longitudinal direction of the seat 10. When this occurs, the backrest 12 connected to the tilt bearing 23 in a manner capable of turning about the turning shaft 13 is moved accordingly.

Each base 15 has a longitudinal slot 28
Is provided. The guide web 27 has a longitudinal slot 2
8 are guided below the inclined bearing 23. The longitudinal slot 28 is sized such that the tilt bearing 23 moves longitudinally with respect to the base 15. This allows the tilt bearing 23 to move in an unhindered manner with respect to the base 15 when the backrest 12 of the seat 10 is tilted.

The two portions of the seat surface 11 are detachably connected to each other by a lock member (not shown). Front 2
When the connection to the rear part 1 is released, the footrest 20 together with the front part 21 is pulled forward or pushed back to the rest of the seat 10. In this process, since the guide rod 18 is carried along with the guide rod 18, the guide rod 18 is moved in the sleeve-shaped base portion 15.
The tilt bearing 23 fixed between them together with the rear part 22 of the seat surface 11, when the footrest 20 is adjusted,
Sliding along the guide rod 18, the position of the inclined bearing 23 with respect to the base portion 15 does not change. The footrest 20, not the seat surface 11, whose front part is fixed to the crosspiece 19, can therefore be adjusted with respect to the seat 10.

Alternatively, it is conceivable to mount the tilt bearing 23 on the base portion 15 in such a manner that it can be moved in the longitudinal direction. Thereby, the connection and the guide of the sliding mode of the inclined bearing 23 along the guide rod 18 can be omitted.

The backrest 12 can be locked to the inclined bearing 23 by a lock screw 34. By tightening the locking screw 34 which extends through the swivel point 25 of the tilt bearing 23, the backrest 12 is fixed in its special position, ie no longer tilts.

The backrest 12 is surrounded by two curved, tubular side parts 30. At their opposite end sections, the side sections 30 are integrally molded or have separate cross tubes 31,32. The bracket surface of the seat 10 is fixed to horizontal cross tubes 31 and 32 extending apart from and parallel to the longitudinal direction of the seat 10 in a direction transverse to the longitudinal direction of the seat 10.

The bracket 12 is, on the one hand, connected to a lateral portion 30
On the opposite side of the seating surface 11 to the tilt bearing 23 and, on the other hand, to the base part 15 via two connecting members designed as connecting rods 33 in the exemplary embodiment shown. You. Each of the identically designed connecting rods 33 has a special swivel point 25.
Is rotatably connected to a side portion 30 of the frame 29 at one end separated from the frame 29. The other end of each connecting rod 33 is likewise rotatably connected to a respective base 15.

The connecting rod 33 allows the backrest 12
The distance between the connection point of the connection rod of the frame 29 and the connection point of the base portion 15 is as follows.
When 2 is rotated, it is kept constant. Frame 29
Due to the distance of the swivel point 25 from the connecting point of the connecting rod 33 in the seat 10, the seat 10, the tilt bearing 23 and the guide rod 18 when the backrest 12 is turned.
Is moved with respect to the base 15. In this case, the front part 21 and the rear part 22 of the seat surface 11 are preferably
Locked together so that they can move together.

Next, the adjustment of the seat 10 will be described in detail with reference to FIGS.

FIG. 4 shows the seat 10 with the backrest 12 folded vertically upward and the footrest 20 fully retracted. The seat surface 11 is thereby reduced to the maximum extent possible by the large overlap of the front part 21 and the rear part 22 of the seat surface 11.

FIG. 5 shows the seat 10 with the footrest 20 fully extended. The seat surface 11 then becomes the largest size, with only a slight overlap between the front 21 and the rear surface 22 forming the seat surface 11.

The footrest 20 of the seat surface 11, together with the front part 21 assigned to it, engages the lock between the front part 21 and the rear part 22 which is first released and the locked, ie non-tilted, backrest part 12. The guide rod 18 is moved together with the footrest 20 which is moved in the base 15.
And adjusted by. In this case, the position of the tilt bearing 23 with respect to the base portion 15 does not change (FIG. 4,
As a result, the position of the rear part 22 of the seat surface 11 does not change. In other words, footrest 2
When zero is adjusted, only the guide rod 18 and the front part 21 of the seat surface 11 change their relative position with respect to the fixed rear part 22, the base part 15 and the tilt bearing 23. After the position of the footrest 20 at the front of the seat surface 11 has been set, the front portion 21 is again locked with respect to the rear portion 22 of the seat surface 11, so that the tilt bearing 23 also Locked to not move along.

FIGS. 5 and 6 show a case where the position of the backrest 12 is different from that of the footrest 20. The footrest 20 is located at the same position with respect to a seat having the same size and the seat surface 11, and has the same depth of the seat.

In FIG. 6, the backrest 12 has been completely folded back so that the person sitting on the seat 10 can move to the reclining position. In order to fold back part 12 backward, first of all,
The locking screw 34 in the area of the swivel point 25 between the backrest 12 and the inclined bearings 23 on opposite sides of the rear part 22 of the seat surface 11 is released. As a result, the backrest 12 is pivoted to the generally horizontal position shown in FIG. During this rotation of the backrest 12, the connecting member 3
3 and the base 15 and the backrest 1
The connection distance of the two rods between the two frames 29 is constant. The result is that the front part 21 is the rear part 22 of the seat surface 11.
And the front part 21 is connected to the base part 15 together with the inclined bearing 23, because the front part 21 is connected to the guide rod 18 by the crosspiece 19. , These ends of the guide rod 18 supporting the footrest 20
5 is moved so as to be pushed further forward. Since the backrest 12 is pivoted downward, the seat surface 11
It is pushed forward toward the footrest 20. This movement of the seat 10 is converted to a reclining surface, and consequently the center of gravity of the person reclining and seating on the seat 10 is pushed back when the reclining position is employed,
The center of gravity of a person reclining in a horizontal orientation changes in a manner that corresponds to the center of gravity of a person in a straight position. The displacement of the center of gravity by changing the upright position to the reclining position is therefore indispensably compensated in the horizontal direction, so that the backrest 1
The risk of the wheeled carriage with seat 10, for example, being turned over when the 2 is pivoted is neutralized.

FIG. 7 shows the folded seat 10 in which the backrest 12 is folded toward the seat surface 11 from above.
Again, due to the presence of the connecting rod 33, the distance from the side portion 30 of the frame 29 of the backrest 12 to the connecting point and the distance from the base 15 to the connecting point are kept constant. As a result, the seat surface 11 with the inclined bearing 23 and the guide rod 18 is moved again with respect to the base portion 15. During folding of the backrest 12 into the seating surface 11, this movement occurs in both opposite directions, in particular initially towards the footrest 20 and then towards the rear. This is achieved by the connecting rod 33 pivoted via the swivel joint 24 and in the process of intersecting the (imaginary) pivot axis 13 extending through the swivel point 25. In this case, the connecting rod 33 is moved beyond the dead center of the rotating shaft 13, resulting in the movement of the guide rod 18 with the seat 10 in the opposite direction to the base 15, and as a result, the base 15 The moving path of the guide rod 18 with respect to is shortened. This results in a shortened guide rod 18 and a generally compact design of the seat 10 and, in particular, its substructure 1
4, resulting in a more compact design.

[Brief description of the drawings]

FIG. 1 is a perspective view of a seat as viewed obliquely from the front.

FIG. 2 is a perspective view of the seat of FIG. 1 as viewed obliquely from behind.

FIG. 3 is an (enlarged) sectional view taken along line III-III of FIG. 1 and FIG. 2 passing through a guide rod of the seat.

FIG. 4 is a side view of a seat including a backrest pivoted upward toward a seating position.

FIG. 5 shows the seat of FIG. 4 with an adjusted footrest.

FIG. 6 is a view similar to FIG. 4, but in a reclined position with the backrest folded down;

FIG. 7 is the seat of FIGS. 4 to 6 in a folded state;

[Description of Signs] 10 ... Seat, 11 ... Seat surface, 12 ... Back part, 13 ...
Rotating shaft, 15 base part, 17 latch pawl, 18 guide rod, 20 footrest, 21 front part, 22 rear part, 23 tilt bearing, 25 swivel point.

 ────────────────────────────────────────────────── ─── Continued on front page (72) Inventor Klaus Janssen, 21614 Buxtehude, Germany, Stralsunder Beek 8 F-term (reference) 3B099 AA04 AA08 BA08 CA26 CA37 CB06 DA10

Claims (25)

[Claims] 1. A seat surface (11) characterized in that at least the position of the seat surface (11) can be changed with the rotation of the back portion (12), and a rotatable back portion ( 12), in particular a wheeled carriage or a seat for a chair for children or people with disabilities. 2. The seat according to claim 1, characterized in that the rotation of the backrest (12) allows the seat surface (11) to be moved along one path with respect to the support frame. 3. A seat according to claim 2, characterized in that the rotation of the backrest (12) allows the seat surface (11) to be moved along one straight path relative to the support frame. 4. The seat according to claim 1, wherein at least a part of the seat surface is movable with respect to the at least one guide member. 5. The backrest (12) comprises a seat surface (11).
The seat according to claim 1, characterized in that the seat is rotatably connected to the seat. Preferably, at least one tilt bearing (23) is assigned in a fixed manner to at least a part of the seating surface (11), and the backrest (12) is turned around the at least one tilt bearing (23). The seat according to claim 1, characterized in that the seat is movably mounted. 7. The seat according to claim 4, wherein the guide member has a guide passage and a base portion (15) guided movably along the passage. 8. A seat (1) provided with a tilt bearing (23).
7. The seat according to claim 6, wherein a part of 1) is movable with respect to the guide passage. 9. A seat (1) comprising a tilt bearing (23).
7. Seat according to claim 6, characterized in that part of 1) is movable with respect to the base part 8 (15). 10. The tilt bearing (23) includes a base portion (1).
10. It is characterized in that it is movable with respect to 5).
The listed seat. 11. The seat according to claim 8, wherein the inclined bearing is movable in a longitudinal direction of the guide passage. 12. The backrest (12) has at least one
At least one base portion (1
The seat according to claim 7, characterized in that the seat is connected to (5). 13. The connecting member has a backrest (12) and an associated base (15). When the backrest (12) is turned, the inclined bearing (23) and the guide passage are connected to the backrest (12). 13. Seat according to claim 12, characterized in that it is connected so that it can be moved longitudinally with respect to the base part (15) together with the seat surface (11). 14. The connecting member, when the seat (10) is folded, the connecting member is provided between the backrest (12) and the rotating shaft (13) connecting the inclined bearing (23).
13. Seat according to claim 12, characterized in that it is connected to the back part (12) and the corresponding base part (15) so as to intersect the swivel point (25). 15. The guide passage is connected to a backrest (20) whose distance from the backrest (12) can be changed at least by moving the backrest (12) relative to the base (15). 8. The seat according to claim 7, wherein the seat is characterized in that: 16. Seat according to claim 1, characterized in that the seat surface (11) is of a multi-part design. 17. The seat surface (11) is formed by a front part (21) and a rear part (22), and the rear part (22) of the seat surface (11) is connected to the inclined bearing (23) in a fixed manner. And the front (2) of the seat surface (11)
17. The seat according to claim 16, wherein 1) is connected to the guide passage in a fixed manner. 18. Seat according to claim 17, characterized in that the front part (21) can be moved relative to the rear part (22) of the seat surface (11) in the longitudinal direction of the guide passage. 19. Seat according to claim 16, characterized in that the front part (21) and the rear part (22) of the seat surface (11) are locked so that they cannot move with respect to each other. 20. Seat according to claim 7, characterized in that the guide passage is designed as a guide rod (18). 21. The guide passage has flexibility in one direction,
8. The seat according to claim 7, characterized in that it is designed as a rigid chain in another direction. 22. At least a part of the seat surface (11)
The seat according to claim 4, characterized in that the guide member is movably mounted on the guide member and the guide member is releasably provided on the support frame. 23. The seat according to claim 22, wherein the guide member is releasably connected to the support frame by connecting means. 24. In the case of a guide member having a guide passage and a base portion moved along the passage, the connecting means is provided on the base portion (15).
The listed seat. 25. The seat according to claim 23, wherein the connecting means is designed as a latching pawl.