FR2577503A1 - BRAKING DEVICE FOR A CHILD CAR - Google Patents

Abstract

THE INVENTION CONCERNS A BRAKING DEVICE FOR A CHILDREN'S CAR, IN PARTICULAR FOR A STROLLER. THE DEVICE INCLUDES A BRAKING ORGAN 6, A LOCK 7, A SINGLE SPRING 8 AND COUPLING MEANS 11, 12 BETWEEN THE BRAKING SYSTEM AND THE LOCK. THE ASSEMBLY IS SUCH THAT THE LOCK AND BRAKE ASSEMBLY COOPERATE PERMANENTLY FROM THE INACTIVE POSITION TO THE BRAKING POSITION FOR WHICH BRAKE ASSEMBLY 6 IS POSITIVE LOCKED.

Description

The invention relates to a braking device

  for baby car, especially for a stroller.

  Among these braking devices, the invention is

  applies to those of the kind in which a braking member, normally resiliently recalled to an inactive position for which it is released from the wheels of the car, can be brought into cc;., braking act with the tread of at least a wheel, this movement occurring against the action of elastic means; when it approaches its braking position, the braking member pushes a bolt, also resiliently urged towards the locking position, the bolt then retanting in this position to prevent

  the return of the locking member to its inactive position

  tive. In known braking devices of this kind, on the one hand, it is necessary to provide a spring associated with the braking member and a spring associated with the bolt and, on the other hand, when unlocking, the forced retraction of the bolt does not automatically release the braking member from the wheel, due to the high friction exerted between the latter and the wheel, this friction being

  caused by partial depressing of the wheel.

  The invention aims to remedy these drawbacks by providing a braking device for a baby carriage which uses a single spring and which allows a str and automatic release of the braking member with respect to the

wheel when the lock is released.

  To this end, the braking device according to the invention

  tion for a baby carriage, in particular a stroller, comprising a braking member intended to be force-fitted against the tread of at least one wheel carried by the chassis,

  and a lock suitable for holding the braking member in position

  active braking position, is characterized in that; the gold-

  braking gane and the lock are articulated on the chassis; coupling means are provided between the braking member and the bolt; a single spring is placed between the frame and the bolt and permanently urges the bolt to tilt

  in the same direction; the positions of the articulation axes

  tion of the brake orqane and the lock on the chassis and the geometry of the coupling means are arranged so that, on the one hand, from a first inactive position for which the braking member is released from the wheel and is held in this position by the lock, the braking member can be tilted, driving the lock with it against the action of the spring, to a second active braking position for which it is in contact with the wheel and from which the bolt, under the action of the spring,

  switches to a locked position preventing re-entry

  turn of the braking member and, on the other hand, from this locking position, the lock can be released by tilting against the action of the spring, the coupling means comprising an element capable of releasing the member from braking with the wheel so that the assembly is brought back by

  the spring in the first inactive position.

  For the braking position of the braking device

  and for the bolt locking position, the bolt sol-

  licit the braking member to a reinforced braking position, and the braking member, due to the reaction of

  the wheel, exerts on the bolt an action preventing any

of this one.

  Advantageously, the coupling means consist of a light and a finger in sliding connection. According to one embodiment, the light belongs to the lock while

  the finger belongs to the braking member.

  The light has a square profile, one of which

  of the branches corresponds to the tilting of the lock for the

  rusting. The connection between the two branches of the bracket is widened to facilitate the passage of said element from one branch to another and it has a ramp constituting said

  element capable of releasing the braking member from the wheel.

  The two branches of the square are very unequal in length, the locking branch being the shortest, while the longest branch corresponds to the passage

  of the braking member between its two positions.

  The braking device is articulated on the chassis

  above the articulation of the lock, the latter being situated substantially at the level of the contour of the wheel for

  allow the latch to tilt to its position of ver-

  rusting without causing movement of the braking member.

  The braking member consists of a wire or a bent metal rod which has a cross member constituting both an operating pedal, the braking means acting directly on the wheel and one of the elements of the coupling means. This cross member is either articulated on the two lateral half-chassis of the car by cooperating with the associated wheels, or acts only on one wheel, or on

two twin wheels.

  The invention will be clearly understood on reading the

  description which follows and with reference to the accompanying drawings

  in which: Figl.1 is a plunging side perspective view

  of the lower rear part of a baby carriage

  blade of the braking device according to the invention, this device being in the inactive position;

  Fig.2 is a view similar to Figure 1 for the posi-

  active braking Fig.3 is a side elevational view from the inside of the stroller of Figure 1, and shows the braking device in the inactive position and in the active braking position; Fig. 4 and 5 show the braking device in two intermediate positions; and Fig. 6 shows schematically, in rear elevation,

  a braking device established according to a variant.

  The rear lower part of a baby carriage has been shown in the drawings which, in known manner,

  a frame element 1, consisting of an upright or leg

  rear, and rear wheels 2 whose axes 3 are

  connected to chassis 1 via a suspension block

sion 4.

  To ensure the immobilization of the car in the

  desired position, the car is generally equipped

  known link, of a braking device 5 which, as a whole, comprises a braking member 6, suitable for coming into frictional contact with at least one of the wheels 2, and a lock 7 arranged to block the member braking 6 in its

braking position.

  According to the invention, the braking member 6 and the

  latch 7 are articulated on the chassis 1, coupling means

  range are provided between these two elements for the entire race

  movement of the braking member 6, and a uniform spring

  that 8 is disposed between the chassis i and the latch 7 for ground-

  permanently license it to tip in the same direction. The positions of the hinge pins 9 and 10 of the braking member 6 and of the latch 7 on the chassis 1, as well as the geometry of the coupling means, are arranged so that, on the one hand, from a first inactive position, for which the braking member is released from the wheel and is held in this position by the bolt, the braking member can be tilted by driving the bolt with it

  against spring action up to a second active position

  ve braking for which it is supported on the wheel and from which the lock, 'under the action of the spring,

  rocks in a locked position preventing re--

  turn of the braking member, and, on the other hand, from this locking position, the lock can be released by tilting against the action of the spring these coupling means comprising an element capable of releasing the member from braking with the wheel so that the assembly is brought back by

  the spring 8 in the first inactive position.

  In the embodiment shown, the coupling means are constituted by a profiled opening 11 of the lock and by a finger 12 belonging to the braking member

  6 and suitable for sliding in the light 11.

  The braking member 6 is constituted by a metal wire-

  folded link which is articulated at 9 on the chassis 1 around a transverse axis, while the latch 7 is constituted by a plate which has at its upper part a folded wing 7a for operation and which can tilt in its vertical plane by being articulated at 10 on the chassis 1 around - a transverse axis which is situated below the axis of the articulation 9 and substantially at the level of the contour of the

wheel 2.

  The light 11 at right angles has two branches 11a, 11b, of unequal lengths, the longest branch 11a corresponding to the movement of the braking member 6 between

  its inactive position and its braking position, and the

  che the shortest llb corresponding to the tilting of the lock towards its locking position. The part 12 of the braking member 6 which cooperates

  with light 11 is not only the means of cooperation

  ration between these two elements, but also the means of

  braking acting directly on at least one of the wheels 2.

  To facilitate the passage of the element 12 from one to the other of the branches 11a, 11b, the connection between these two branches is widened and, as described below, it has

a release ramp 13.

  The single spring 8 is an angular or torsion spring which is wound around the axis of the articulation 10 of the lock and which is supported on the frame 1 and on the lock 7 to permanently urge the latter to tilt in the

direction of arrow A (Fig. 3).

  For the inactive position of the braking device, the element 12 which cooperates with the lock 7 is released from the wheel 2 and it is located at the closed end of the branch lla

  light 11 under the action of spring 8 (Fig.3).

  To bring the braking member 6 into the active position, the user presses on the element 12 which, against the action of the return spring 8, causes the braking member 6 and the latch 7 to tilt in the clockwise. In the vicinity of its braking position (Fig. 4), the element 12 comes into contact with the tread of the wheel 2, a position in which it still cooperates with the branch 11a and from which it compresses this strip of bearing to reach its braking position shown in solid lines in the figure and in broken lines in Figure 3. For this braking position, the element 12 has left the branch 11a and it is in the branch Ilb. Because the latch 7 is biased by the spring 8 counterclockwiseA, it switches alQrs

  in this direction to go from the position of the figure -

  to that of Figure 3 by locking the device

  braking 6 in its braking position.

  According to a characteristic of the invention, for the

  braking position of the braking member 6 and for the posi-

  Locking latch 7, latch 7, by its spring

  8, urges the braking member towards a braking position

  reinforced swimming, and the reaction of the wheel 2 on the braking member exerts on the lock 7 an action which, if it

  exists, does not cause any tilting torque on it.

  As shown in FIG. 3, for the braking and locking position, the element 12 is substantially aligned with the articulation 9 and the axis 3 of the wheel 2, while the angle formed by the articulation 9, item 12 and

  the joint 10 is substantially equal to 90.

  It should be noted that, because the articulation 10 is situated substantially at the level of the contour of the wheel 2, the lock 7 can tilt, in its locking stroke, under the action of the spring 8, without any movement of the organ

brake 6 is required.

  For this, the branch llb can be in the form of an arc of a circle centered on the axis of the articulation 10, this arc of a circle being able, because of the play, to be replaced by a

equivalent line segment.

  For the locked braking position, the branch 11b is directed substantially towards the articulation 9, so that, in order to be able to disengage, the braking member 6, by its

  element 12, acts on the latch 7, transversely to the di-

  rection of the branch 11b, along a line of action which passes through the axis of the joint 10. This characteristic

  geometric prohibited element 12 from retracting lock 7.

  In the embodiment of FIGS. 1 to 5, the or-

  braking gane 6 constitutes a cross member which extends over the entire width of the stroller and which can therefore serve as an operating pedal, while in the embodiment of FIG. 6, it is associated with a single side wheel, or

to a pair of side wheels.

  In both embodiments, to release the braking member 6 relative to the wheel 2r the user presses with his foot on the folded wing 7a of the lock 7 to tilt the latter clockwise against the action of the spring 8, to bring the latch beyond the position of FIG. 5, so that the ramp 13 which is inclined substantially at 45 relative to the two branches lla and lb, releases the element 12 relative to the tread of wheel 2 and initiates movement of it towards the position

  inactive cleared shown in solid lines in Figure 3.

  When the user releases the lock 7, the spring 8 brings the assembly constituted by the lock 7 and the braking member 6 towards the released inactive position, the braking member 6 being controlled, during this movement, by sliding in

branch lla of light 11.

  With the device according to the invention, the single spring 8 and the latch 7 ensure both the guiding and the maintenance of the braking member 6 towards and in the released inactive position, the locking of the braking member 6 in braking position, the reinforcement of the braking for this position and the positive release of the braking member

  from its braking position.

  Of course, the invention is not limited to the embodiments which have been described; we could on the contrary conceive various variants without going out of its way

frame.

Claims (15)

  1.- Braking device for a baby carriage, in particular a stroller, comprising a braking member (6) intended to be forced against the tread of at least one wheel (2) carried by the chassis (1), and a lock (7) suitable for holding the braking member (6) in the active braking position, characterized in that: the braking member (6) and the bolt (7) are articulated on the chassis (1) ; coupling means (11, 12) are provided between   the braking member (6) and the latch (7); a single spring   that (8) is disposed between the frame (1) and the latch (7) and permanently urges the latch to tilt in the same direction (A); the positions of the joints (9, 10) of   the braking device and the lock on the chassis and the geometry   sorts coupling means (11, 12) are arranged so that, on the one hand, from a first inactive position, -for which the braking member (6) is released from the wheel (2)   and is held in this position by the latch (7), the   braking gane can be tilted by driving with it the lock against the action of the spring (8) to a second active braking position for which it is supported on the wheel and from which the lock, under the action   of the spring, switches to an interlocking position   saying the return of the braking member, and, on the other hand, from this locking position, the lock can be released by tilting against the action of the spring, the coupling means (11, 12) comprising a element (13) adapted to release the braking member from the wheel so that the assembly is brought back by the spring in the first inactive position.   2. Braking device according to claim 1, characterized in that, for the locking position, the   latch (7) biases the braking member (6) towards a position   reinforced braking, while the reaction action   of the braking element (6) is not likely to provoke quer a tilting of the lock (7).   3.- Braking device according to one of the claims   cations 1 and 2, characterized in that the means of cou-   range consist of a light (11) and a finger (12) sliding connection.   4.- braking device according to claim 3, characterized in that the light (11) belongs to the lock   (7) and the finger (12) belongs to the braking member (6).   5. Braking device according to one of claims 3 and 4, characterized in that the light (11) has a square profile, one of which (11b) of the branches corresponds to the tilting of the latch (7) for locking and whose   the other (lia) of the branches corresponds to the tilting of the   braking gane (6) between the first and second positions.   6. Braking device according to claim 5, characterized in that the connection between the two branches (lia, llb) of the bracket is widened to facilitate the passage of said element (12) from one branch to another and has a ramp (13) constituting said element capable of releasing the member braking (6) with the wheel (2).   7. Braking device according to claim 6, characterized in that the ramp (13) is inclined substantially   at 45 with respect to branches lia, llb).   8.- Braking device according to one of the claims   5 to 7, characterized in that the two branches of the é-   angles are of very unequal lengths, the shortest branch (llb) corresponding to the locking tilting of the lock (7).   9. Braking device according to claim 8,   characterized in that the branch (llb) corresponding to the bottom-   locking abutment is in an arc centered on the axis of the articulation (10) of the lock or of equivalent rectilinear shape.   10.- Braking device according to one of the claims   1 to 9, characterized in that the braking member (6) is articulated on the chassis (1) above the articulation (10) of the latch (7), which is located substantially at the contour of the wheel (2) to allow the locking lock to tilt without movement of the braking member (6).   11.- Braking device according to one of the claims   tiors 1 to 10, characterized in that, for the braking position, the element (12) which cooperates with the roll band of the wheel (2), is substantially aligned with the articulation   (9) of the braking member on the chassis and the pivot axis wheel (2).   12.- Braking device according to one of claims 1 to 11, characterized in that, for the braking position, the hinge pins (9, 10) of the braking member (6) and of the lock (7) on the chassis (1) and the element (12) of the braking member which cooperates with the wheel (2)   substantially form a right angle.   13.- Braking device according to one of the claims   cations 1 to 12, characterized in that the braking member (6) consists of a wire or a bent metal rod which has a cross member constituting both a foot pedal   operation, the element acting directly on the wheel and the   element of the braking member (6) which cooperates by coupling with the lock (7).   14. Braking device according to claim 13, characterized in that the cross member is articulated on the two lateral half-chassis of the car by cooperating with the associated wheels.   15. Braking device according to claim 13, characterized in that the cross member is articulated on a single half-frame and acts only on a single side wheel.   (2), or on a pair of twin side wheels.