Abstract
The invention relates to a buggy comprising an upper sliding frame and a lower sliding frame to which the front wheels are attached. In the upright driving position of the buggy, viewed in the side view, the upper sliding frame and the lower sliding frame are approximately aligned with one another. There is also a rear frame to which the rear wheels are attached. In the driving position, the buggy, viewed from the side, is oriented at an angle to the sliding frames, and the buggy can be collapsed about joints from the driving position into a transport position. Joint units, to which the respective end of a strut of the upper sliding frame facing the joint units and the respective end of a strut of the rear frame facing the joint units, are attached so as to be pivotable about joint axes, which are parallel to one another.
Claims
1. A buggy or perambulator comprising an upper sliding frame, a lower sliding frame, to which the front wheels are attached, wherein, in the upright driving position of the buggy, viewed in the side view, upper sliding frame and lower sliding frame are approximately aligned with one another, as well as a rear frame, with rear wheels being attached to said rear frame, said buggy, in the driving position, viewed in the side view, is oriented at an angle to the sliding frames, wherein the buggy can be collapsed about joints from the driving position into a transport position, in which upper sliding frame, lower sliding frame and rear frame are virtually parallel with one another, and wherein joint units are provided, to which the respective end of a strut of the upper sliding frame, which faces said joint units on the one hand, and the respective end of a strut of the rear frame, which faces said joint units on the other hand, are attached so as to be pivotable about joint axes, which are parallel to one another wherein the end of the strut of the upper sliding frame, which faces the joint unit, and the end of the strut of the rear frame, which faces the joint unit, are connected to one another via a first toothed wheel, which rotates about the joint axis of the strut of the upper sliding frame, and a second toothed wheel, which rotates about the axis of the strut of the rear frame, and wherein a first locking pin is located at the first toothed wheel and engages with a catch on a first, smaller base plate, and a second locking pin is located at the second toothed wheel and engages with a catch on a second, larger base plate.
2. The buggy according to claim 1, wherein the first toothed wheel and the second toothed wheel are connected in such a manner that, a pivot movement of the strut of the upper sliding frame in a first direction of rotation results in a pivot movement of the strut of the rear frame in opposite direction of rotation.
3. The buggy according to claim 1, wherein the end of the strut of the lower sliding frame, which faces the joint unit, is fixedly attached to the joint unit.
4. The buggy according to claim 1, wherein provision is made on the joint units for a joint cover, which prevents a jamming of a body part of a user in the space between the struts, which move in the direction of one another, upon collapsing the buggy into the transport position, because the respective ends of the struts are spaced apart from one another on the user side in the joint vicinity.
5. The buggy according to claim 1, wherein provision is made for at least one hook, which, after releasing an engagement with locking elements, makes it possible to unlock the joint units and thus to pivot the struts and to collapse the buggy into the transport position in which the upper sliding frame, lower sliding frame and rear frame are virtually parallel with one another.
6. The buggy according to claim 5, wherein the hook can be disengaged from the locking elements by means of at least one tie against a spring force.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
(1) The instant invention will be specified in more detail below by means of exemplary embodiments with reference to the enclosed drawings.
(2) FIG. 1 shows a view of a buggy according to an exemplary alternative of the instant invention in the opened driving position;
(3) FIG. 2 shows an enlarged detailed view of a joint unit, which connects the struts of the chassis to one another in an articulated manner, in a position, which corresponds to the opened driving position according to FIG. 1;
(4) FIG. 3 shows an exploded illustration of the joint unit;
(5) FIG. 4 shows an enlarged detailed view of the joint area, viewed from the right side;
(6) FIG. 5 shows a similar detailed view of the joint area, viewed from the left side;
(7) FIG. 6 shows a further detailed view, which explains the unlocking of the joint;
(8) FIG. 7 shows a corresponding view as in FIG. 6, but viewed from the other side;
(9) FIG. 8 shows a further detailed view of the joint area;
(10) FIG. 9 shows a view, which shows a detail from FIG. 8;
(11) FIG. 10 shows a further lateral view of the joint area;
(12) FIG. 11 shows a view of a detail from FIG. 10, wherein this is a view from the other side of the joint.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
(13) Reference is initially made to FIG. 1. It shows the buggy according to the invention, which is identified with reference numeral 10, in a schematically simplified side view in the opened driving position. The chassis of the buggy comprises an upper sliding frame, which, viewed in the front view, is approximately U-shaped on principle, comprising an upper transverse connection, which cannot be seen here, and in each case furthermore has a strut 11, which extends downwards, which extends to the joint unit 12, on both sides in each case. On the other side of the joint unit 12, the chassis of the buggy continues in the lower sliding frame, the strut 13 of which runs approximately in an alignment with the strut 11 of the upper sliding frame, wherein this strut 13 can be fixedly connected to the joint unit 12. Such struts, which are parallel to one another, in turn, are present on both sides of the buggy. The front wheels 14 are mounted to the lower end of the struts 13 of the lower sliding frame. The struts 11 of the upper sliding frame are connected to the joint unit 12 in an articulated manner, namely about a horizontal axis, which extends in transverse direction of the buggy. With their upper end, struts 15 of the rear frame are in each case furthermore connected in an articulated manner to the joint unit 12. The rear wheels 16 of the buggy are mounted to the lower end of these struts 15 of the rear frame. In the driving position shown in FIG. 1, the struts 15 of the rear frame in each case extend at an angle to the struts 11 of the upper sliding frame and to the struts 13 of the lower sliding frame.
(14) The collapsing of the buggy from the driving position shown in FIG. 1 into the flat collapsed transport position occurs in such a manner that the upper sliding frame is moved in the direction of the arrow in the direction of the lower sliding frame 13 and the strut 11 is thus moved in the direction of the strut 13 so as to pivot clockwise in the drawing. In contrast, the strut 15 of the rear frame pivots in the direction of the lower arrow in FIG. 1 in the direction of the strut 13 of the lower sliding frame 13 and thus pivots in opposite direction of rotation as the strut 11 of the upper sliding frame. The struts of the frame units of the chassis are connected to one another via gear means in the joint unit 12 in such a manner that an inevitable coupling to the pivot movement of the strut 15 of the rear frame results in response to the collapsing movement in response to pivoting the strut 11 of the upper sliding frame and that the strut 15 thus moves in the direction of the strut 13 of the lower sliding frame, until the collapsed transport position has been reached, in which the struts 11, 13, 15 are located virtually parallel to one another, so that the transport position is very flat.
(15) The mode of operation and the setup of the joint unit 12 and the afore-mentioned gear means will be specified below in detail by means of the further drawings. FIG. 2 shows a schematic, enlarged side view of the joint unit 12, in which the strut 11 of the upper sliding frame, which branches off from said joint unit 12, the strut 15 of the rear frame, which branches off from said joint unit 12, and the strut 13 of the lower sliding frame, which branches off from the joint unit, can be seen. The joint unit has a joint cover 121, so that upon collapsing the buggy into the transport position does not result in the risk that the user jams his fingers in the space between the struts 11 and 13 or 15 and 13, respectively, which move in the direction of one another. It can be seen that the joint unit 12 prevents this, because the respective ends of the struts are spaced apart from one another on the user side in the joint vicinity.
(16) FIG. 3 shows an exploded view of a joint unit 12. It can be seen here that the strut 13 of the lower sliding frame, which leads to the front wheel, is arranged approximately radially/tangentially to the joint axis and is fixedly connected to the joint cover 121. On the visible side, the joint unit has a cover 122. Viewed in the direction of the joint axis, a hook 123, by means of which the joint can be unlocked when the buggy is to be collapsed, is located downstream from the joint cover 121. The unlocking can take place by pulling on the hook 123. For this purpose, a tie 127 is present, the function of which will be explained in more detail below. A toothed wheel part comprising a first larger toothed wheel 124, which rotates about the main axis of the joint, is connected to the strut 15 of the rear frame. Provision is furthermore made for a second toothed wheel part 125 comprising a smaller toothed wheel, which cogs with the first toothed wheel 124 and which thus rotates in the opposite direction of the first larger toothed wheel 124, so that it is attained in response to the pivot movement of the strut 11 of the upper sliding frame that the strut 15 of the rear frame pivots in the opposite direction of rotation and moves along. The joint unit furthermore comprises a smaller base plate 129, arranged between the joint cover 121 and the toothed wheel part 124, as well as a larger second base plate 130, which is arranged upstream of the second joint cover 126.
(17) Reference is made below to FIGS. 4 and 5. It can be seen therein that the hook 123 is connected to a spring 128 and engages with a recess 131 in the smaller base plate 129. Provision is furthermore made for a first locking pin 132 as well as for a second locking pin 133, each of which overlap angled ends of the hook 123, wherein the first locking pin 132 is located at the first toothed wheel unit 124 (see FIG. 3) and engages with a catch on the smaller base plate 129, while the second locking pin 133 is located at the second toothed wheel unit 125 and engages with a catch on the second larger base plate 130. Both toothed wheels can be locked in this manner via the locking pins 132, 133 by means of the hook 123 and the pivoting of all of the struts 11, 13 and 15 can thus be prevented.
(18) FIG. 5 shows that secondary locking pins 134 (on the toothed wheel side 124) or 135 (on the smaller toothed wheel unit 125), respectively, can be located on the respective other side of the toothed wheel units, wherein the locking pin 134 engages below a catch 136 of the large base plate 130 and the locking pin 135 engages with an annular groove 137 of the large base plate 130.
(19) It can be seen in FIGS. 6 and 7 that the hook 123 can be pulled in the direction of the arrow against the force of the spring 128 by means of the tie 127, so as to release the engagement with the various locking pins. As can be seen from FIG. 7, the tie 127 engages with a nose 139 behind a pin 138 on the hook 123 for this purpose. After the hook 123 is pulled out, the base plates 129 and 130 of the joint can rotate freely. After passing the locking pins 132, 133, the spring 128 pulls the hook 123 back into the locked position (see FIG. 8). FIG. 9 shows the engagement of the two toothed wheels 124, 125, which illustrate the gear means of the joint unit.
(20) FIG. 10 shows the engagement of the locking pin 133 on the small base plate 129 once again in the collapsed transport position of the buggy, whereby the pivot movement of the strut 11 of the upper sliding frame is limited (see also FIG. 8 with the arrow illustrated therein for the pivot direction). The engagement of the secondary locking pins 134, 135 with the annular groove 137 or with a further catch 140 of the large base plate 130, respectively, can be seen in FIG. 11, wherein the pivot path of the locking pins 134, 135 as compared to the base plate 130 can be seen by a comparison with the illustration according to FIG. 5.
LIST OF REFERENCE NUMERALS
(21) 10 buggy 11 strut of the upper sliding frame 12 joint unit 121 joint cover 122 cover 123 hook for the unlocking 124 toothed wheel part comprising first large toothed wheel 125 toothed wheel part comprising second small toothed wheel 126 second joint cover 127 tie 128 spring 129 first smaller base plate 130 second larger base plate 131 recess 132 locking pin 133 locking pin 134 locking pin 135 locking pin 136 catch 137 annular groove 138 pin 139 nose 140 further catch 13 strut of the lower sliding frame 14 front wheel 15 strut of the rear frame 16 rear wheel
