ES2349111T3 - FOLDING CHASSIS FOR CHILDREN'S CARS. - Google Patents

Abstract

Folding chassis for strollers, comprising two rear rear wheels (1, 2) and a centered front rolling support (3), and a U-handlebar (4) that is removably coupled by the end of its branches (5, 6) to an intermediate point of lateral elements (7, 8) related to the rear wheels (1, 2), which by their upper end (9) are articulated in two armrests (10, 11) articulated in turn subsequently (12) to the handlebar branches, characterized in that the lateral elements (7, 8) related to the rear wheels (1, 2) are topped off with two bearing bushings (13, 14) threaded on a central section of an axle (15) coupled to the wheels (1, 2) through two inflected sections (16, 17) of the axle (15), to whose central section two connecting rods (18, 19) jointly connected (20) with a central support (21) ) where, by its middle section, it articulates a U element that, at the end of its branches (24, 25), is It articulates to the extreme area (26) of the handlebar branches and that through an intermediate point (27) thereof is articulated to the lateral elements (7, 8) related to the rear wheels.

Description

OBJECT OF THE INVENTION

 Folding chassis for strollers.

FIELD OF THE INVENTION 5

 This chassis is intended for strollers comprising three wheels, two rear and a front center.

BACKGROUND OF THE INVENTION

 Some 10 models of this class of strollers have been known for some years, which present some drawbacks such as an excess of volume once folded, difficulty obtaining the folding by the person carrying the stroller, and once folded They do not remain on 15 feet which makes handling and storage difficult.

 Some of these problems have already been solved in the folding infant car-seat object of the Spanish Utility Model No. 200101210 (ES-1050104) which is owned by the applicant 20 itself, whose car seat comprises a chassis consisting of articulated elements that They facilitate the juxtaposition of the component elements among themselves, obtaining a compact folding, easily achieving the unlocking of the device that keeps the car-chair deployed by means of two controls provided in the upper part of the handlebar branches resulting in a great comfort for the person who You must fold the car seat.

 This car-chair comprises laterally two 30 stringers-armrests that: by its front end

they are articulated to respective legs that converge inferiorly where the front wheel is coupled, by an intermediate point they are articulated to two rear legs related to the corresponding rear wheels, and by their rear end they are articulated to an intermediate point of the handlebar branches; at the lower end of the handlebar branches articulates at its ends a transverse U-element that articulates laterally to the U-frame for the seat and to the rear legs 10, the front ends of the U-frame of the seat being articulated to the front legs.

 A folding chassis for strollers in accordance with the features of the preamble of the 1st claim is known from German patent DE20200401601811.

SUMMARY OF THE INVENTION

 With the folding chassis object of the invention, a simplification is achieved in the structure of the stroller and at the same time a more compact folding of this type of strollers.

  To this end, it is characteristic of this chassis that the rear legs have been replaced by lateral elements that are topped off with two bearing bushings 25 threaded on the central section of the axle coupled to the rear wheels through two inflected sections, to whose central section two connecting rods are connected articulately with a central support where it articulates by its middle section a U-element that by the end of its branches is

articulates to the extreme area of the handlebar branches and that by an intermediate point of the same articulates the lateral elements related to the rear wheels.

 Also characteristic is the fact that the central support is coupled and guided longitudinally on the lower face of a central stringer which at its rear end is coupled by a block-bearing in the central section of the axle coupled to the rear wheels, and that at its front end it comprises the arrangement of the rolling support constituted by a self-orientating double wheel.

 So that the rear part of the chassis is reinforced the constitution of the axle (to which the rear wheels are coupled) based on a central section and two end sections, one for each wheel, which are fixed together by fastening the own connecting rods to said shaft, it is ensured with the presence of a crossbar that links the two indicated bearing bushings together.

 And in order to obtain greater stability of the chassis in the front rolling support, it is planned to provide it with two independent wheels that are supported by two short arms laterally derived from the front end of the central crossbar in opposite directions.

These and other characteristics will be better derived from the detailed description that follows, to facilitate which is accompanied by five sheets of 30 drawings in which a practical case has been represented

of embodiment that is cited only by way of non-limiting example of the scope of the present invention.

DESCRIPTION OF THE DRAWINGS

 In the drawings. 5

 Figures 1 and 2 show the set of this deployed chassis seen in rear perspective and folded according to side view, respectively,

 Figures 3 and 4 illustrate in side view this unfolded and semi-folded chassis, respectively, 10

 Figures 5, 6 and 7 are details seen in perspective of the post-lower part of the chassis,

Figure 8 shows the assembly of this reinforced chassis seen in rear perspective,

Figure 9 is a perspective detail of the constitution of the axle of the rear wheels and the associated elements thereof, of the chassis according to Figure 8, and

Figure 10 illustrates in perspective the detail of the constitution of the front rolling support, with two independent 20 wheels.

DETAILED DESCRIPTION

 According to the drawings, this folding chassis for strollers comprises two rear wheels (1) and (2) side wheels and a front 25 rolling support (3) centered and constituted by a self-orientating double wheel, and a U-handlebar (4) that at the end of its branches (5) and (6) it is removably coupled to an intermediate point of lateral elements (7) and (8) related to the rear wheels 30 (1) and (2), which at its end

upper (9) are articulated to the front end of two armrests (10) and (11) which at their rear end are articulated by point (12) to the respective branches of the handlebar.

 The indicated lateral elements (7) and (8) are topped off with two bearing bushings (13) and (14) strung on the central section of the axle (15) (figure 6) coupled to the rear wheels (1) and (2) through two inflected sections (16) and (17). 10

 To said central section of the shaft (15) two connecting rods (18) and (19) are articulated jointly connected by their free end (20) (figure 5) with a central support (21) by means of an arcuate plate (22) articulated by its front end (23) 15 to said central support (21).

 In this central support (21) it articulates by its middle section a U element of branches (24) and (25) that by its ends articulates to the lower end zone (26) of the handlebar branches, and by a 20 point Intermediate (27) thereof is articulated to the side elements (7) and (8) related to the rear wheels.

 The central support (21) is coupled and guided by an appendix (28) (figure 6) in a longitudinal groove 25 (29) provided on the underside of a stringer (30) which at its rear end is coupled by a block- bearing (31) in the center of the central section of the shaft (15) and which at its front end comprises the mounting of the rolling support (3). 30

 The handlebar (4) comprises a U-handle (32)

articulated by means of shafts (33) (provided with a locking device (34)) to the indicated branches (5) and (6), which comprise in their upper part two sliding controls (35) and (36) for unlocking the coupling of the lower end (37) 5 of said branches in receiving devices (38) provided at the intermediate point of the side elements (7) and (8). The articulation of the handle (32) contributes to the compact folding of the chassis (figure 2).

According to figure 9 The axle to which the rear wheels (1) and (2) are coupled is constituted by a central section (15 ') to which both inflected end sections (16') and (17 ') are coupled, one for each wheel, whose coupling is fixed by means of the fastening (39) of the connecting rods (18) and (19) to the axle, 15 and is secured by the presence of a cross member (40) that links the bearing bushings together. (13) and (14) for which these two appendixes (13 ') and (14') are presented, which are fixed on respective end stumps (40 ') of the indicated crossbar. twenty

According to Figure 10, the front rolling support (3) comprises two independent wheels (41) and (42) self-orientated supported on two arms (43) and (44) derived laterally from the front end of the central crossbar (30) in directions 25 divergently opposed.

According to figure 8, this chassis, in the armrests (10) and (11), comprises two boxes (45) and (46) for receiving the coupling means of the corresponding seat-cradle (not shown) and for its use as a car-chair will be equipped with

the corresponding seat, backrest, front railing, footrests, etc., presenting the appropriate accessories such as the suspension and brake means.

5

Claims (6)

 1. Folding chassis for strollers, comprising two rear wheels (1, 2) side and a front rolling support (3) centered, and a 5 U-handlebar (4) that by the end of its branches (5, 6) it is removably coupled to an intermediate point of lateral elements (7, 8) related to the rear wheels (1, 2), which at their upper end (9) are articulated in two armrests (10, 10 11) articulated in turn subsequently (12) to the handlebar branches, characterized in that the lateral elements (7, 8) related to the rear wheels (1, 2) are topped off with two bearing bushings (13, 14) strung 15 on a central section of an axle (15) coupled to the wheels (1, 2) through two inflected sections (16, 17) of the axle (15), to whose central section two connecting rods (18, 19) jointly connected (20) are connected with a central support (21) 20 where it articulates by its middle section a U-element that by the end of its branch s (24, 25) is articulated to the extreme area (26) of the handlebar branches and that through an intermediate point (27) thereof is articulated to the lateral elements (7, 8) 25 related to the rear wheels.  2. Folding chassis for strollers according to claim 1, characterized in that the central support (21) is coupled and guided longitudinally on the underside of a central stringer 30 (30) which at its rear end is coupled by means of a block-bearing (31) in the central section of the axle (15) coupled to the rear wheels and which at its front end comprises the arrangement of the rolling support (3) constituted by a self-orientating double wheel. 5  3. Folding chassis for strollers according to claim 1, characterized in that the articulated relationship between the connecting rods (18, 19) and the central support (21) is effected by means of an arcuate plate (22). 10 4. Folding chassis for strollers according to claim 1, characterized in that the axle to which the rear wheels are coupled (1, 2) is constituted by a central section (15 ') to which two end sections are coupled ( 16 ', 17'), one for each wheel, ensuring this coupling by means of the fixation (39) of the indicated connecting rods (18, 19) to the axle (15) and with the presence of a crossbar (40) that links each other to the indicated bearing bushings 20 (13, 14).  5. Folding chassis for strollers, according to claim 2, characterized in that the front rolling support (3) comprises two independent wheels (41, 42) supported by two 25 short arms (43, 44) derived laterally from the front end of the central stringer (30) in opposite directions.