CN104781132B - cart - Google Patents

Abstract

The invention relates to a stroller, in particular a baby stroller, having a plurality of wheels (14, 18) arranged on a carrier and rotatable about a rotational axis (26). At least one of the at least one wheel (14, 18) is designed as a pivotable steering wheel (24). The pushchair also has a securing unit (36) for selectively releasing and locking the pivotability, which has a locking element (40) and a receiving element (44) with a locking element receptacle, which can be moved relative to one another between a locking position and a release position by placing the locking element (40) and/or the receiving element (44) in a pretensioned state, in which the locking element (40) can be pretensioned in the direction of the receiving element (44) and/or the receiving element (44) can be pretensioned in the direction of the locking element (40), and in which the locking element (40) automatically sinks into the locking element receptacle (48) of the receiving element (44) when the steering wheel (24) is subsequently pivoted.

Description

cart

technical field

The invention relates to a stroller, especially a baby carriage, a toy car, a walker and the like.

Background technique

Strollers, for example in the form of baby carriages, usually have a stand with a push rod or with a handle. A plurality of wheels are arranged on the carrier, which are mounted on the carrier so that they can each rotate about an axis of rotation. In order to be able to comfortably maneuver such strollers, the carriages of some strollers have at least one wheel, which is constructed according to the type of a steering wheel that can pivot about a pivot axis extending substantially transversely to its axis of rotation . It is of course advantageous here if such a steerable wheel can be selectively fixed so that it can no longer be steered. For this purpose, in the prior art there are fastening units for selectively releasing and locking the pivotability of the steering wheel. Such a fastening unit has a locking element which cooperates with a locking element receptacle of the receiving element. In this case, one of the two elements can move together when the steering wheel is pivoted, while the other of the two elements is fixed for its part. The two elements are movable towards and away from each other, ie relative to each other between a release position and a locking position. Activation or deactivation of such a fastening unit takes place here, for example, by hand or by foot.

Contents of the invention

It is an object of the present invention to provide a stroller, in particular a baby stroller, which has a simple and conveniently actuatable fastening unit for at least one wheel designed as a pivotable steering wheel.

In order to solve said object, the present invention proposes a stroller, in particular a stroller, which is provided with:

- bracket,

- a plurality of wheels rotatable about an axis of rotation arranged on a support,

- wherein at least one of the wheels is configured as a steering wheel pivotable about a pivot axis running substantially transversely to the axis of rotation of said wheel,

- a fixing unit associated with at least one steering wheel for selectively releasing and locking the pivotability of the at least one steering wheel,

- wherein the fastening unit has a locking element and a receiving element with a locking element receptacle that moves together when at least one steering wheel is pivoted, said locking element and receiving element can be positioned relative to each other in a locked position and a released position In the locking position, the locking element sinks into the locking element receptacle of the receiving element, and in the release position, the locking element is outside the locking element receptacle of the receiving element.

In such a cart it is proposed according to the invention:

- in order to transform the fixing unit from releasing the pivotability of the or one steering wheel to locking said pivotability, the locking element and/or the receiving element can be placed in a pretensioned state, in which In this case, the locking element can be prestressed in the direction of the receiving element and/or the receiving element can be prestressed in the direction of the locking element, and in said prestressed state, the locking element automatically sinks into the In the locking element receptacle of the receiving element.

In the case of the pushchair according to the invention, the fastening unit is then also activated for locking the pivotability of at least one steerable wheel, ie the steering wheel, when the steering wheel is not in the position for straight-line travel. That is, when the steering wheel deviates from the orientation for the straight running of the rotating wheel to be locked, the fastening unit can be operated, which causes the two elements that are placed in engagement with each other, namely the locking element and the receiving element, to be prestressed. In the pretensioned state, the locking element and the receiving element are, for example, elastically pretensioned relative to each other. Consequently, the locking element is finally locked into the locking element receptacle when the steering wheel is pivoted in this pretensioned state, and thus when the steering wheel assumes its straight-running orientation during pivoting. This results in comfortable operability of the fastening unit because the user does not have to first place the steering wheel in the straight-line position and then lock it.

The fastening unit proposed according to the invention is therefore particularly advantageous if it can be operated via a depressible button. The button can be designed, for example, as a foot switch, ie operated with a foot. By pressing or operating the button several times, the fastening unit alternates alternately between releasing and locking the pivotability of the steering wheel. That is, by pressing the button, one of the two elements (locking element or receiving element) is moved forwards, that is to say, in the direction of the other element. Here, a configuration known, for example, from known cardioid mechanisms is provided. Alternatively, it is also possible to use a mechanical device such as is known from ballpoint pens, in which the cartridge can be moved out and in alternately by pressing a button several times.

In a further advantageous embodiment of the invention it is provided that the locking element receptacle of the receiving element is arranged on a movement path along which the receiving element and the locking element can move relative to each other when the steering wheel is pivoted. . As already mentioned above, when the steering wheel is pivoted, the receiving element and the locking element move relative to each other. The locking element receptacle is then provided along the movement path, so long as the steering wheel is not already in the linear running position to be locked when the fastening unit is activated, then (when the receiving element and the locking element are pretensioned) the locking element is in the During pivoting, the steering wheel sinks into the locking element receptacle.

In a further advantageous embodiment of the invention it can be provided that each steering wheel or pair of steering wheels is assigned a fastening unit. A plurality of steering wheels can be arranged on the support as a steering wheel pair or a single steering wheel. One fastening unit is suitably provided for each set of co-pivotable steering wheels. In particular, it can be provided that a plurality of, in particular two, wheels of the carrier, each formed as a steering wheel, are coupled to each other via a steering rod, and that one of the steering wheels or the steering rod coupled to each other via the steering rod is assigned a fastening unit.

According to a possible aspect of the invention, it is provided that the wheel formed as a steerable wheel has a pivot bearing with a first bearing element arranged on a support and a second bearing for rotatably receiving the wheel or a pair of wheels The second bearing element is rotatable about the pivot axis relative to the first bearing element, so that the locking element is movably arranged on the first bearing element between the locking position and the releasing position, and the receiving element is arranged on the on the second bearing element and can rotate together with the second bearing element about the pivot axis, wherein the receiving element is designed as a spring-loaded spring-loaded spring-loaded locking element receptacle for the locking element Disc or plate of sunken housing.

As already mentioned above, it is advantageous that the locking element can be transferred from the release position against the preload to the locked position by pressing the button, and can be automatically moved from the locked position by pressing the button again following the preload into the release position.

For the operability of the button, for example with a foot, it would be appropriate that the pressing movement of the button extends at an angle to the movement of the locking element, and that the button and the locking element pass through at least one of the buttons on the button or on the locking element. The bevels or the bevels on the button and on the locking element contact each other and slide against each other.

In order for the pushbutton to assume the same position (disengaged position) regardless of whether the fastening unit is activated or deactivated, it would be expedient for the pushbutton to be pretensioned in the opposite direction to the push-down movement.

In addition to the fact that at least one wheel of the frame of the cart according to the invention is formed as a swivel wheel, it would also be appropriate if at least one wheel formed as a swivel wheel can optionally be detachable from the frame and can be coupled to the on the stand. Due to the detachability of the steered wheels (and possibly also other wheels) from the support, the support can be folded and stowed in a space-saving manner.

Description of drawings

In the following, the invention will be explained in detail based on exemplary embodiments and with reference to the drawings. Here it is shown in detail:

Figure 1 shows a perspective view of an embodiment of a stroller in the form of a baby carriage,

2 shows a sectional view through the front wheel of the stroller stand according to FIG. 1 along the line II-II, wherein the fixing unit for the pivotability of the front wheel is shown in its release position,

FIG. 3 shows a sectional view through the front wheel similarly to FIG. 2 , however the pivotability of the fixing unit is locked,

Figure 4 shows a view of the heart-shaped mechanism to illustrate the mechanism for linearly reciprocating the locking element by repeated actuation of the button, wherein the locking bolt is held in its two final positions, respectively, wherein ( again) operate the button,

FIG. 5 shows a view of the stroller similarly to the view according to FIG. 1 , however, for example, after the steering process, the front wheels have deviated from the straight-ahead position, and

FIG. 6 shows a section through the fastening unit along the line VI-VI of FIG. 5 in the pretensioned state of the two interacting elements of the fastening unit, namely the locking element and the receiving element.

detailed description

FIG. 1 shows an embodiment of a stroller, in this case a stroller 10 . The stroller 10 has a frame 12 which, in the exemplary embodiment, has two rear wheels 14 and two centrally arranged front wheels 18 . The two front wheels 18 rest on a common holder 20 , said support being pivotable about a (vertical) pivot axis 22 , so that the two front wheels 18 are designed according to the type of steering wheels 24 . The axes of rotation, about which the wheels rotate when the stroller 10 is pushed, are each indicated at 26 .

FIG. 2 shows a sectional view along the line II-II through the front wheel 18 and its bearing and holding device on the frame 12 . The holder 20 is a bearing element 28 of a pivot bearing 30 whose other bearing element 32 is fixed and mounted on the support 12 . By means of the mounting pins 34 , a pair of front wheels including the holder 20 can be detached from the bearing element 32 and thus from the frame 12 and placed on it again, which can be advantageous, for example, when folding and storing the frame. The mounting bolt 34 also defines a pivot axis 22 about which the rolling cage can be pivoted relative to the carrier 12 .

The pivotable fastening unit 36 , which can be used to selectively release and lock the front wheel set, comprises a locking bolt 38 as locking element 40 and a perforated disc 42 as receiving element 44 . The perforated disk 42 is provided with receiving holes 46 as locking element receptacles 48 , but can also have a plurality of such locking element receptacles 48 , which then implies that the rolling cage can be locked on several different pivots. Turning position. This is not necessarily advantageous in the case of baby carriages, but should not be excluded within the scope of the invention.

As can be seen from FIG. 2 , the pair of front wheels 18 is in the (pivoted) position, ie in the straight-line running position, wherein the bolt 38 is directly flush with the receiving opening 46 of the perforated disk 42 . When the locking bolt 38 is pressed down in this position (this is done by operating the button 50 ), then the locking bolt 38 sinks into the receiving hole 46 of the perforated disk 42 and locks the holder 20 with respect to the pivotability. Front wheels 18 (see Figure 3). When the button 50 is actuated again, the locking bolt 38 is moved upwards again due to the clamped spring 49 , as shown in FIG. 2 . The linear reciprocating movement of the locking bolt 38 takes place, for example, by means of a cardioid mechanism, as schematically shown in FIG. 4 . The cardioid mechanism has a cardioid chute 47 in which is guided a pin 45 which is pivotally connected to the locking bolt 38 and which, after pressing the button 50, will lock the The bolt 38 is secured in a locked or released position, respectively, at the upper and lower connection points of the two typically symmetrical half-curvatures 43 , 41 with respect to each other. Since cardioid mechanisms are known in principle, they will not be described in detail within the scope of the present invention. It is also not necessarily necessary to use a cardioid mechanism for the movement of the locking bolt between its release position (see FIG. 2 ) and its locking position (see FIG. 3 ). It is also not necessary for the locking element 40 to be a linearly displaceable locking bolt 38 ; locking elements which are movable back and forth along a curvature are likewise possible within the scope of the invention.

The special feature of the fastening unit 36 is that, as can be seen in FIGS. 4 and 5 , the locking bolt 38 can also be moved by the actuating button 50 if the pivot position of the front wheels 18 deviates from a straight line. That is to say, this means that when the locking bolt 38 is pushed down, it cannot simultaneously sink into the receiving opening 46 of the perforated disk 42 , which in itself means that the locking bolt 38 cannot be pushed down at all in the first place. However, due to the elastic pretension provided between the locking bolt 38 and the perforated disk 42 , it is possible, however, to press the locking bolt 38 down. This is shown, for example, in FIG. 6 . The perforated disk 42 is elastically prestressed in the receiving space 52 of the holder 20 in the direction of the locking bolt 38 by means of the helical pressure spring 54 , ie when the locking bolt 38 is pressed down and does not sink into the receiving hole 46 . The hourly perforated disc 42 can be displaced into the receiving space 52 . If now starting from the situation according to FIG. 6 , wherein the fixing unit 36 is in its position for locking the pivotability, the holder 20 and thus the pair of front wheels 18 pivot, the depressing and disengaging locking bolt 38 During pivoting, it reaches the receiving opening 46 of the perforated disk 42 in that the perforated disk 42 pushes due to its pretension onto the disengaged locking bolt 38 .

As can be seen from the drawing, the button 50 is moved along an axis indicated by the double arrow 56 which runs at an angle to the direction of movement 58 of the locking bolt 38 . The button 50 is also prestressed into its pressed-open position by means of a compression spring 60 . The movement of the button 50 is diverted into the longitudinal movement of the locking bolt 38 via a pressing element 62 arranged on the button 50 , which has an inclined or sliding surface 64 which is in contact with the end face 66 of the locking bolt 38 . cooperate and slide along said end face 66 when the button 50 is operated.

Claims (10)

1. a kind of go-cart, has：

- support (12)；

- multiple in the upper wheel (14,18) arranging, can rotating around pivot center (26) of the support (12),

- wherein at least one of described wheel (14,18) wheel is configured to surround and extends substantially transversely to turning for the wheel The deflecting roller (24) that the pivot axis (22) that shaft line (26) is moved towards are pivoted, and

- the fixed cell (36) that is associated with deflecting roller described at least one (24), for optionally discharging and being locked to The energy pivotability of few one deflecting roller (24),

- wherein described fixed cell has locking element (40) and is moved when deflecting roller described at least one (24) is pivoted together Receiving element (44), the receiving element has locking element receiving portion (48), and the locking element and receiving element can Relative to each other move between latched position and off-position, in the locking element receiving portion, the locking element (40) sink in locking element receiving portion (48) of the receiving element (44), in the off-position, the lock Only element (40) is in outside locking element receiving portion (48) of receiving element (44),

Characterized in that,

- in order to the fixed cell is transformed into described in locking extremely from the energy pivotability for discharging at least one deflecting roller (24) The energy pivotability of a few deflecting roller (24), locking element (40) and/or the receiving element (44) can be placed in Under Pre strained state, under the Pre strained state, locking element (40) can be pre- towards the direction of the receiving element (44) Tight and/or receiving element (44) can be towards the direction pretension of the locking element (40), and in the Pre strained state Under, locking element (40) automatically sink to the receiving element in the case that the deflecting roller (24) is subsequently pivoted (44) in locking element receiving portion (48), and

The wheel for being configured to deflecting roller (24) has pivot bearings (30), the pivot bearings have be placed in the support (12) clutch shaft bearing element (32) on and the second bearing element (20) of the wheel or pair of wheels can rotationally be accommodated, institute State second bearing element to rotate with respect to described clutch shaft bearing element (32) around pivot axis (22) so that described Locking element (40) can be arranged on the clutch shaft bearing element with moving between the latched position and the off-position (32) on, and the receiving element (44) to be arranged on described second bearing element (20) upper and can be with the second bearing Element is rotated around described pivot axis (22) together, wherein described receiving element (44) is configured to towards the locking element (40) pretension, the disk of spring loading or plate, the disk or plate have sunk receiving portion as the locking element (40) locking element receiving portion (48).

2. go-cart according to claim 1, it is characterised in that the locking element receiving portion of receiving element (44) (48) arrange on following motion paths, receiving element (44) and the locking element (40) are pivoted in the deflecting roller (24) When be movable with respect to each other along the motion path.

3. go-cart according to claim 1 and 2, it is characterised in that each deflecting roller (24) or a pair of deflecting roller (24) are joined It is provided with fixed cell (36).

4. go-cart according to claim 1 and 2, it is characterised in that multiple wheel warps for being respectively structured as deflecting roller (24) It is coupled to each other by turning-bar, and a deflecting roller in the deflecting roller (24) being coupled to each other via the turning-bar or institute State turning-bar and be equipped with fixed cell (36).

5. go-cart according to claim 1 and 2, it is characterised in that two wheel warps for being respectively structured as deflecting roller (24) It is coupled to each other by turning-bar, and a deflecting roller in the deflecting roller (24) being coupled to each other via the turning-bar or institute State turning-bar and be equipped with fixed cell (36).

6. go-cart according to claim 1 and 2, it is characterised in that locking element (40) can be by pressing button (50) start to be transformed into the latched position against pretightning force from the off-position, and can be by pressing described in pressing again Button (50) follows the pretightning force to be automatically transformed into the off-position from the latched position.

7. go-cart according to claim 6, it is characterised in that the lower of button (50) presses motion and the locking element (40) motion is angularly moved towards, and the button (50) and the locking element (40) are via on the button (50) Or at least one inclined-plane on locking element (40) or by button (50) and the locking element (40) Inclined-plane contacts with each other and near slip.

8. go-cart according to claim 6, it is characterised in that described button (50) direction presses the contrary direction of motion with lower Pretension.

9. go-cart according to claim 1 and 2, it is characterised in that be configured to car described at least one of deflecting roller (24) Wheel optionally can be left behind from the support (12) and can be coupled on the support (12).

10. go-cart according to claim 1, it is characterised in that the go-cart is perambulator.