DE3050689C2 - Locking device for a folding stroller - Google Patents

Description

F i g. 10 is a sectional view taken along line IX-IX of FIG Fig. 6,

11 is a sectional view taken along line X-X of FIG F i g. 6 as well

F i g. 12 is a perspective view of FIG. 6th illustrated embodiment in connection with a locking sleeve.

F i g. 1 shows a folding stroller in the unfolded state. In detail, the stroller includes a Pair of front supports 3 and a pair of rear; o supports 4, the pairs of supports through a front Connecting rod 8 and a rear connecting rod 10 are connected to each other. The connecting rods 8 and 10 are designed to be foldable in the direction indicated by the arrows 7 and 9, respectively F i g. 1 can be seen further, the stroller has a pair of push rods 6, which are at the top in a Continue handle bar 12, which is U-shaped and with a central section in the direction of the arrows 11 is foldable The push rods 6 are hinged at their lower ends to an angle rail 14, which, on the other hand, is articulated to the rear supports. Furthermore, there are connecting rods 18 hinged to the angle rails 14 at 15, these connecting rods 18 forward to the extend front supports 3 and are hinged there at IS. Between the connecting rods 18 extends a central connecting rod 21, which can also be folded in the direction indicated by the arrows 20 The folding movement is after pressing down the push rods 6 over the angle rails 14 on the rear Supports 4 and the armrests 1 connected to them and transferred to the connecting rods 18.

To block the stroller in the unfolded position, i.e. unintentional folding To prevent the stroller, the embodiments indicated in Figures 2 to 12 are used Locking device.

According to the fig. 1 to 5, the upper end of each push rod 6 is formed with a guide bush 73. This guide bushing receives one end of the handle bar 12. The handle bar 12 is made of one Round tube or a rod made and rotatable within the guide bushing 73 about its axis. The side surface of the guide bushing 73 is formed with an elongated slot 74 which extends Extends over about 90 ° and serves to receive a guide pin 75 ', which is attached to the handle bar 12 for the Push rod 6 is fixed. The guide bushing 73 is provided with a fork 76 which has through openings 77 has. An actuating handle 78 has a through opening 79. When they are aligned with one another openings 79 and 77, a pin (not shown) is inserted into these openings so that the handle 78 is pivotably mounted in the guide bushing 73. The operating handle 78 has a recess 80 its downward facing surface. At the portion where the recess 80 is formed, this is The upper end of a rod 81 is attached, the lower end of the rod 81 being attached to a locking sleeve 44 is.

The locking sleeve 44 is slidably mounted on the lower portion of the push rods 6. Here is the push rod 6 formed adjacent to the socket 44 with an elongated hole 45, one being attached to the socket 44 The pin runs through the elongated hole 45. The interaction between slot 45 and pin 46 determines the Beweeunesbereich for the socket 44. Inside the push rod 6 between the pins 45 and 46 is a Arranged spring 47, soft the socket resiliently downward into its locking position with the angle rail 14 presses In detail, the lower end face of the socket 44 is always in operative contact with the opposite end of the angle rail 14 pressed to the stroller in the unfolded state to secure.

The operating handle 78 has a double function, namely once it is to face the locking bushing 44 the angle rail 14 after appropriate actuation and on the other hand the handle bar 12 against a Secure rotation relative to push rod 6. If the operating handle 78 is pivoted downward, is the guide pin 75 received in the recess 80 (Figs. 3 and 4), whereby the handle bar 12 on a Rotation relative to the guide bush 73 is prevented. If the operating handle is pivoted in the direction of arrow 82 is, the rod 81 is displaced in the direction of arrow 83, whereby the locking sleeve 44 from the angle rail 14 is released while the guide pin 75 disengages from the recess 80 and so that a pivoting of the handle bar 12 is made possible. Thereafter, the operating handle 78 is moved upwards pivoted over the dead center and comes into its stable position.

After the operating handle 78 has been pivoted in the direction of the arrow 82, by appropriate actuation the push rods 6 of the stroller are folded because the locking sleeve is opposite the angle rail disengaged and consequently the angle rails by pushing down the push rods at the rear in the direction of arrow 17 according to FIG. 1 can swing out. Swinging down the operating handle 78, which is ultimately pressed against the spring 47, is made when the unfolded position of the stroller is fixed.

6 to 12 show views of a further embodiment. The upper end of each push rod 6 is designed with a guide bush 35. The push rod 6 is formed from a square tube or rod and with its upper end inserted into the square socket section 36 of the guide socket 35. The upper section of the Guide bushing 35 forms a cylindrical section 37 which receives one end of the handle bar 12. The portion received in the cylindrical portion 37 is that which is axially with the Push rod 6 is aligned. The handle bar 12 is similar to the push rod 6 from a square Tube or rod formed, however, rotation about the cylindrical portion 37 is possible if the Handle bar 12 is received in this section 37. The side surface of this cylindrical section is formed with an elongated guide opening 38 which extends over 90 ° and for receiving a Guide pin 39 is used. This extends laterally from the handle bar 12. The handle bar 12 is thus within the range determined by the length of the elongated guide opening 38.

The end face of the guide bush 35 is formed with laterally protruding grooves 40. An operating handle 41 is coaxial with the push rod and above the Guide bush 35 arranged. The operating handle 41 is provided with a square opening 42 into which the handle bar 12 is inserted and thereby an axial sliding of the operating handle along the handle bar 12 allows while simultaneously rotating

relative to the handle bar 12 is prevented. The operating handle 41 has downwardly extending projections 43 formed, which engage in the grooves 40 when it is moved along the handle bar 12. This Engagement prevents pivoting of the handle bar 12 relative to the push rod 6. This means that the Pivoting movement in the direction of arrow 11 in FIG. 1 is prevented. Between the operating handle 41 and the locking sleeve 44 is to form a coupling between These components a wire 48 is arranged as a connecting member. The coupling through this wire 48 is described in more detail below.

The in F i g. The state shown in FIG. 12 corresponds to that in FIG. 1 state of the stroller shown. If the operating handle 41 in the direction of arrow 49 (Fig. 12) Is pulled up, the locking sleeve 44 is through moves wire 48 upward. This lifts the lower surface of the locking sleeve 44 off the end of the angle rail 14 from, so that now the pivoting of the angle rail 14 in the direction of arrow 17 is enabled, whereby the folding process of the trolley is initiated. The between the actuator 41 and the guide bushing 35 resulting position after pivoting the handle is shown in FIG. 6, in which the Projections 43 are located outside the grooves 40. While maintaining this position, for example by slightly turning the operating handle 41 in the direction of arrow 50 to the lower end face of the projections 43 to put on the upper end face of the guide bushing 35, the handle 41 is then around the axis of the Push rod 6 rotated in the direction of arrow 50, whereby the handle rod 12 relative to the guide bush 35 rotated and thereby a folding in the direction of arrow 11 in F i g. 1 is effected. This will make that Folding of the stroller initiated

If the operating handle 41 is handled in reverse, the handle 41, which is secured by the means of the Spring 47 loaded bushing 44 is pressed down over the wire 48, that when the projections 43 are aligned with the grooves 40, a cooperation between these automatically effected and a meeting causes between the lower end face of the socket 44 and the end of the angle rail 14 will.

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For this purpose 3 sheets of drawings

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Claims (5)

1 2 which, in their engagement with the angle rails, are resiliently biased. 1. Locking device for a Klappkin- Such a locking device is already derwagen, which has a pair of front and rear, 5 known from DE-OS 24 54 557 This locking with Wheeled supports, between the device has the disadvantage that the locking sleeve for A pair of extending connecting rods which disengage the angle rail from the locking Distance between the pairs of supports must be pushed upwards by hand. men, a pair of push rods and a pair of This is awkward because it's the folding stroller Has angle rails, each with one end io serving person up to the range of Winkelmit one of the rear supports and with its other rail has to stoop, with the direct one Ren end with the lower end of the associated handling of the locking bushes a risk of injury Pushrod are pivotally connected with on consists the push rods arranged to be axially displaceable. The object of the invention is to provide a Locking bushings, which in their locking device of the type mentioned above with the angled locking device nen engaged locking position fe- to develop that the unlocking of the folding child which are pretensioned, which means that the carriage is simplified into the ready-to-fold position distinguishes that the locking bushes (44) in itself. This object is achieved according to the invention by the im in a known manner, each indicated via a connecting member characterizing part of claim 1 (81, 48) solved with a feature provided on the push rod (6). Appropriate refinements Nen operating handle (78, 41) for disengaging the are characterized in the subclaims Locking bushing out of its locked position. According to the invention, the locking bushings are are bound and that the operating handles (78,41) in via a connecting link with an operating handle the locking position at the same time one in each connected, which is arranged on the push rod. In a manner known per se, rotatable from the associated 25, the unlocking of the locking sleeves is considerable The handle bar accommodated in the connecting rod (6) is simplified because only the intended actuation Lock (12) in the position of use. maintenance handles must be used. The actuation 2. Locking device according to claim 1, handles act at the same time with a locking device for the characterized in that the one ends of the handle bar together, the rotatable on the push rod Handle bar (12) is arranged in a known manner in each case 30 and by corresponding pivoting coaxially With the associated push rod (6), the folding stroller of FIG are directed. Width allows the operating handles to 3. Locking device according to one of the andes thus simultaneously two different locking claims 1 to 2, characterized in that the functions are influenced When actuating handle (78) pivotable on one of the 35 Although a Verrie push rod is already from US-PS 36 53 681 (6) fixed guide bushing (73) stored gelation device for folding strollers known at which rotatably receives the handle bar (12) with an actuator provided on the push bar with a protruding pin (75) a supply handle via a connecting member locking bushes The slot (74) of the guide bushing (73) extends through its locking position. From the which the actuating handle (78) in the locking 40 DE-OS 28 22 944 is also a similar locking position encompasses treatment device known in which the operating handle 4. Locking device according to one of the pivotably mounted on the push rod. By both Proverbs 1 to 2, characterized in that the known locking devices met, however The operating handle (41) on the handle bar (12) turns the operating handle only has a single function, which is shown in is firmly displaceable and in the locking position 45 the disengagement of locking sleeves from their locking is in a fixed guide position on the push rod (6) socket (35) which rotates the handle bar (12) takes, engages non-rotatably. application described with reference to the drawing. In it shows 5. Locking device according to one of the preceding F i g. 1 is a perspective view of a folding skin Claims, characterized in that 50 derwagen with an embodiment of the invention the locking sleeve (44) in a known manner according to the locking device, with a pin (46) in an elongated hole (45) of FIG. 2 a recorded on the push rod Push rod (6) is guided locking bushing and guide bushing in perspective Opinion, 55 Fig. 3 is a partially broken perspective view of part of the FIG. 2 device shown, FIG. 4 shows a sectional view along the line III-III from FIG The invention relates to a locking device Fig. 2, for a folding stroller that has a pair of front F i g. 5 shows a longitudinal section of the FIG. 2 shown and rear, wheeled supports, between 60 bushing, see connecting rods extending to the pair, FIG. 6 is a perspective view of another which determines the distance between the pairs of supports. agree, a pair of push rods and a pair of F i g. 7 is a sectional view along the line VI-VI from FIG Has angle rails, each with one end Fig. 6, with one of the rear supports and with its other 65 Fi g. 8 is a sectional view taken along the line VII-VII of FIG End with the lower end of the associated push F i g. 6, rod are pivotally connected, with on the thrust F i g. 9 is a sectional view along the line VIII-VIII rods axially displaceably arranged locking sleeves, from F i g. 6,