Highchair with improved closing mechanism

Abstract: A folding highchair comprises a seat (11) and a supporting frame supporting the seat. The frame comprises legs (12,13) which are movable caliper-fashion between an open position and a closed position. A pedal (36) is disposed close to a lower end of the legs to operate the release of means (22) for holding the legs (12,13) in the open position, so as to enable the movement of the legs (12,13) towards the closed position upon lowering the pedal (36).

Description: This invention refers to a highchair with an innovative closing mechanism, which makes the highchair more practical to close, as compared to the mechanisms proposed in the known technique. The main problems in designing foldable highchairs are basically being able to reduce the overall dimensions of the highchair in the closed position and ensure that the highchair absolutely cannot fold up accidentally, for example due to a wrong movement or a locking mechanism not properly engaged. In particular, the requirement to satisfy the indispensable need to prevent unintentional folding complicates the closing movement and the various stop mechanisms, making the voluntary folding movements relatively complicated and inconvenient. In the known technique numerous closing mechanisms have been proposed. For example, highchairs with pairs of legs which close caliper-fashion and with locking toggles disposed laterally between the legs have been proposed. Even though the mechanism made in this way is undoubtedly safe, to the point of being adopted by practically all highchair manufacturers, it is somewhat inconvenient to use, since it is necessary to simultaneously unlock both toggles on the opposing sides of the highchair. An example of these highchairs is shown in the U.S. patent US-A-4.722.570. The problem of designing a folding highchair with satisfactory features is further complicated if the highchair is to be provided with good means of adjustment, for example seat height adjustment. The general scope of this invention is to obviate the aforementioned problems, by providing a folding highchair which is extremely easy to open and close while at the same time being absolutely safe to use, and also having extremely small overall dimensions in the closed position and a high degree of adjustability in the position of the seat. This scope is achieved, according to the invention, by providing a folding highchair having the features cited in claim 1. The innovative principles of this invention and its advantages with respect to the known technique will be more clearly evident from the following description of a possible exemplificative embodiment applying such principles, with reference to the accompanying drawings, in which: figure 1 shows a perspective view of a highchair according to the invention, in a first position of use or position with the seat completely raised; figure 2 shows a perspective view of the highchair in a second position of use, or position with the seat completely lowered; figure 3 shows a rear perspective view of the highchair during the closing operation; figure 4 shows a side view of the highchair in a fully closed position; figures 5 and 6 show, respectively, partial schematic side and top views of a portion of the highchair closing mechanism of the previous figures; figure 7 shows a schematic view of a locking device for locking the highchair in the closed position; figure 8 shows a schematic view of a mechanism for tipping up the tray of the highchair. With reference to the figures, figure 1 shows a highchair, generically indicated by reference 10, in a first open position with the seat 11 (if necessary provided with a tip-up tray 21) completely raised. The highchair has a frame which comprises a pair of U-shaped legs 12, 13, hinged from above in correspondence with elements 14, 15, to enable them to be opened and closed caliper-fashion. The legs can comprise wheels 16 resting upon the ground. Each leg 12, 13 can be made with a pair of lateral uprights, for example made of tubular metal, joined from below by a horizontal element 19, 20. Advantageously, the seat 11 is supported on the front leg 12 alone by means of a pair of lateral supports 17, 18, which can be made to slide along the lateral uprights of the leg 12, as will be explained further on, to shift the seat 11 from the completely raised position, shown in figure 1, to the completely lowered position, shown in figure 2, if required, with several intermediate stable positions. Locking means 22 normally maintain the legs in the open position. A pedal 36 enables the user to release the locking means to allow the highchair to be folded by bringing the legs close together. The locking means can be made by means of an articulated crosspiece 22, hinged between the horizontal elements 19 and 20 of the legs. As can be clearly seen in figure 3, the locking crosspiece_ 22 is divided in an intermediate position to form two semi-crosspieces 25, 26, hinged together by means of an articulated joint element 27. When the highchair is open the articulated joint 27 is locked, so as to maintain the crosspiece rigid, with the two semi-crosspieces aligned with each other (figures 1 and 2). As can be clearly seen in figure 3, disposed close to the rear end of the crosspiece is a release pedal 36, whose operation causes the release of the articulated joint and enables the highchair to be folded up. The pedal is positioned in such a way as to render the highchair easily foldable with one simple movement. In fact, it is sufficient to stand behind the highchair, press the pedal with one foot and simultaneously lift the hinged ends of the legs, as can also be clearly seen in figure 3. The fact that the seat is secured just to the front leg renders the operation particularly easy and relatively effortless. If it is required for the highchair to have the minimum overall dimensions in the folded position, before carrying out the folding movement it is necessary to shift the seat to the lowest position and tip the tray 21 upwards. The highchair thus takes on the appearance shown in figure 4. Figure 5 shows the pedal-operated mechanism for locking and releasing the central articulated joint of the crosspiece. The articulated joint element 27 has hinge pins 28, 29 for hinging the semi-crosspieces 25, 26, so as to enable only the upward hinging movement shown in figure 3. The element 27 inferiorly supports stiffening means, made in the form of a lock bolt 30 which is rotatably pivoted according to a vertical axis 31. As can also be clearly seen in figure 6, the bolt 30 has arms 32, 33, which extend so as to interfere with the semi-crosspieces and prevent their reciprocal hinging movement when the bolt is disposed in a locking position substantially parallel to the length of the crosspiece. The bolt 30 is held in the locking position by means of a spring 34. The pedal 36 is hinged to the semi-crosspiece 26 according to a horizontal axis 37 and is connected to the bolt 30 by means of a tension wire 38, for example a metal cable. Upon lowering the pedal, the tension wire 38 turns the bolt, against the action of the spring 34 to shift it to the position 30' shown by the chain line in figure 6. In this position, the ends 32, 33 of the bolt no longer interfere with the semi-crosspieces, thereby allowing their reciprocal folding movement. The bolt 30 has a central finger 35 which protrudes from below to position itself close to the floor when the highchair is in the open position. The finger 35 acts as a limiting device for limiting the downward flexure of the crosspiece (flexure which could be caused, for example, by accidental loads applied to the crosspiece), thereby preventing excessive stress on the articulated joint 27. To ensure against accidental operation of the pedal 36, the pedal itself is advantageously provided with a locking lever or enabling element 39, pivoted by 40 to the pedal to rotate in the plane of the pedal against the action of a spring (not shown). In its stable position, the locking lever extends over the pedal, as shown in figure 6, and a locking finger 41, integral with the lever, rests upon a protrusion 42 which rises from the semi-crosspiece 26 beneath the pedal 36. Interference between the finger 41 and the protrusion 42 thus prevents the pedal from being pressed down. To operate the pedal, simply rest the foot on the pedal while simultaneously rotating the locking lever towards the left with the side of the foot, as shown in figure 3, so as to shift the finger 41 to the side of the protrusion 42 and free the movement of the pedal. Figure 7 shows a device 43 for locking the highchair in the closed position. This device comprises a cursor 44 that slides up one leg of the highchair against the action of a spring 45. The cursor has a tooth 46 which fits into a housing made in an element disposed on the other leg of the highchair. When the highchair is folded up, the tooth 46 snaps elastically into the housing, preventing the legs from being pulled apart. An operating tab 49 enables the cursor to be lowered against the action of the spring 45, to release the tooth 46 from the housing 47 in order to unfold the highchair. Figure 7 also schematically shows the operating mechanism of the lockable cursor 17 for adjusting the height of the armchair. The cursor 18, being identical, is not shown in detail. The cursor comprises a release button 50, which moves a lever 51, against the action of a spring 52, so as to disengage a tooth 53 from one slot 54 of a plurality of slots 54 disposed at regular intervals on the leg along which the cursor slides. To adjust the height of the seat, simply grip a cursor 17, 18 in each hand and press the buttons 50, slide the seat into the desired position and release the button so that the teeth 53 engage in a new slot 54. As can also be seen in figure 7, the casing of the cursor 17 comprising the locking mechanism advantageously also acts as a coupling element for the tooth 46. In this way, suitably choosing the position of the cursor 43 along the leg ensures that the seat is shifted to the lower position before the highchair is folded up. Figure 8 shows a possible mechanism 55 for the tip-up movement of the tray 21. The mechanisms 55 are two in number, one on either side of the tray, as can be clearly seen in figure 1, and comprise a hinge element 56, pivoted by 57 into the armrest of the seat to support one end of a tube 58 supporting the tray. The hinge element 56 has a slot 59 into which fits a cursor 60 biased by a spring 61. The cursor has an externally protruding button 62 which can be operated manually to release the cursor from the slot 59 so as to allow the tray to be shifted towards the raised position, shown by the broken line in figure 8. At this point it will be clear that the intended scopes have been achieved by providing an adjustable highchair having a reliable opening and closing mechanism which is extremely easy to operate. The foregoing description of an embodiment applying the innovative principles of this invention is obviously given by way of example in order to illustrate such innovative principles and should not therefore be understood as a limitation to the sphere of the invention claimed herein. For example, the conformation of the seat can vary according to particular practical or aesthetical requirements. Moreover, the pedal means can also act to disengage the crosspiece in a position different from a central position forming two semi-crosspieces.

Claims: Folding highchair comprising a seat (11), a frame supporting the seat and having legs (12, 13) which are movable caliper-fashion between a frame open position and a frame closed position, the frame further comprising releasable locking means (22, 30) connected to the legs (12, 13) to maintain the legs in the frame open position when locked, characterized in that a pedal means (36) is arranged on the frame, close to one lower end of the legs, the pedal means having an operational connection to the locking means (22, 30), on operation of the pedal means (36) said operational connection acting upon the locking means (22, 30) to release them in order to enable the legs to be moved towards the frame closed position. Highchair as claimed in claim 1, characterized by the fact that the releasable locking means comprise an articulated crosspiece (22) which is hinged between the legs (12, 13) in a position close to the lower ends of the legs, joints (27) of the crosspiece being blocked by stiffening means (30) which can be disengaged by means of the pedal means (36). Highchair as claimed in claim 2, characterized by the fact that the stiffening means comprise a bolt (30), movable between a locked position and a position in which the articulated joints bend freely, a tension wire (36) being connected between the bolt (30) and the pedal means (36) to shift the bolt from the locking position to the free bending position upon operation of the pedal means. Highchair as claimed in claim 3, characterized by the fact that the bolt is a rotating bolt (30) which is pivoted to a joint element (27) bearing the articulations (28, 29) of the crosspiece so as to be rotatable to and from the interference position and the non-interference position. Highchair as claimed in claim 2, characterized by the fact that the pedal means (36) are disposed close to a hinge (24) between the crosspiece and one leg. Highchair as claimed in claim 1, characterized by the fact that the pedal means comprise an element (39) which enables their operation. Highchair as claimed in claim 1, characterized by the fact that the pedal means comprise an operating pedal (36) and the enabling element consists of a'lever (39) pivoted onto the pedal and elastically movable in a lateral direction to the pedal to disactivate a locking element (41, 42) which prevents the lowering of the pedal (36). Highchair as claimed in claim 1, characterized by the fact that the legs movable caliper-fashion consist of a front leg (12) and a rear leg (13) each comprising a pair of parallel uprights, the seat (11) being slidingly supported on the pair of uprights of the front leg (12) by means of a pair of cursors (17, 18) each sliding along an upright of the front leg (12), the cursor (17, 18) comprising a device (50, 51) which engages in slots (54) disposed at intervals along the upright, the engaging device having a button (50) for the controlled disengagement and free sliding of the seat. Highchair as claimed in claim 1, characterized by the fact that disposed between the legs are releasable coupling means (43, 46, 47) for locking the legs in the closed position. Highchair as claimed in claim 1, characterized by the fact that the seat (11) comprises a tip-up tray (21). Highchair as claimed in claim 1, characterized by the fact that the tray (21) comprises locking means (55), releasable by means of a button, for locking the tip-up movement. Highchair as claimed in claim 8, characterized by the fact that in the closed position the seat is contained between the uprights of the legs. Highchair as claimed in claim 10, characterized by the fact that in the closed position the tray is in the tipped up position.

Inventors: PEREGO GIANLUCA, PEREGO, GIANLUCA
Applicants: PEG PEREGO S P A, PEG PEREGO S.P.A.
Application year: 1996
Main classification: A47D1
IPC codes: A47D1