TWI549847B - A baby carriage with an auxiliary wheel device - Google Patents

Description

Stroller with auxiliary wheel device

The present invention relates to a stroller, and more particularly to a stroller having an auxiliary wheel device.

Referring to FIG. 1 , a typical stroller includes a foldable frame 11 , four wheels 12 disposed on the frame, and a handle 13 disposed on the frame 11 .

In general, the number of wheels affects the stability and mobility of the stroller. That is to say, the stroller of the four wheels 12 is stable but cannot be applied to a variety of road surfaces, such as: beaches, narrow roads, undulating terrain, etc. However, the travel with infants and young children has become a trend nowadays, so when the family travels to the beach or on the mountain, the average baby carriage is not easy to move on different terrains, causing inconvenience. On the other hand, due to the existing baby stroller, the front and rear wheels are far apart, so when the whole stroller is turned or turned, the radius of rotation is large, and if it is in a narrow space, it has maneuverability. Lesser disadvantages.

In addition, although the frame 11 is foldable, the structure of the frame 11 is complicated due to the relationship of the wheels 12. In order to prevent the structure of the frame from being loose, various locks are provided at each joint. , card, etc. Pieces (not shown), so when folding the frame, it is necessary to adjust each limit piece one by one in order to fold, which will take a lot of time to fold or unfold the stroller, which is quite inconvenient.

Accordingly, it is an object of the present invention to provide a stroller having an auxiliary wheel device that is easy to fold and deploy and that can be applied to various road surfaces.

Accordingly, the baby carriage having the auxiliary wheel device of the present invention comprises a frame, two wheels, a handle, a seat unit, and a wheel assisting device.

The frame includes an axle shaft disposed adjacent to the ground and laterally disposed, and a ridge shaft disposed on the axle shaft and extending upward. The wheels are respectively disposed at opposite ends of the axle shaft and are rotatable on the ground. The handle and the seat unit are disposed on the frame.

The auxiliary wheel device includes a front wheel frame and a rear wheel frame that are sleeved on the wheel axle and are respectively located on the front and rear sides, at least one front auxiliary wheel disposed on the front wheel frame, and at least one disposed on the rear wheel frame. a rear auxiliary wheel, a slidably sleeved on the ridge of the frame and respectively connected to the front wheel frame and the sliding member of the rear wheel frame, the auxiliary wheel device being movable between a deployed position and a folded position In the deployed position, the sliding member abuts against the axle shaft, the front wheel carrier and the rear wheel carrier are adjacent to the ground and extend forward and backward respectively, but the front auxiliary wheel and the rear auxiliary wheel cannot simultaneously contact the ground. In the retracted position, the sliding member slides upward and away from the axle, the front auxiliary wheel and the rear auxiliary wheel are close to each other and away from the ground.

The effect of the invention lies in: the setting by the auxiliary wheel device The stroller can be moved in the form of two wheels or three wheels, so that it can be applied to a variety of road surfaces, and has the advantages of easy folding and unfolding.

2‧‧‧ frame

21‧‧‧ Wheel axle

22‧‧‧Spine

3‧‧‧ Wheels

4‧‧‧Hands

5‧‧‧Seat unit

6‧‧‧Auxiliary wheel device

61‧‧‧ front wheel frame

62‧‧‧ Rear wheel frame

63‧‧‧ front auxiliary wheel

64‧‧‧ rear auxiliary wheel

641‧‧‧ shaft

65‧‧‧Slipper

651‧‧‧Sliding body

652‧‧‧ linkage rod

653‧‧‧Collection hole

654‧‧‧Expand hole

66‧‧‧Retracting positioning parts

7‧‧‧Control Module

71‧‧‧Expanding positioning parts

72‧‧‧Flexible parts

73‧‧‧Drive unit

731‧‧‧ linkages

732‧‧‧Slope

733‧‧‧ Transmission cable

734‧‧‧ operation button

735‧‧‧Safety buckle

D‧‧‧ Wheel height

D1‧‧‧ front wheel height

D2‧‧‧ rear wheel height

Other features and effects of the present invention will be apparent from the embodiments of the present invention, wherein: FIG. 1 is a perspective view illustrating a conventional stroller; FIG. 2 is a perspective view showing the present invention having an auxiliary wheel An embodiment of the stroller of the device; FIG. 3 is a partial perspective view showing an auxiliary wheel device of the embodiment in a deployed position; FIG. 4 is a partial side view showing a front auxiliary wheel of the auxiliary wheel device and a Figure 5 is a view similar to Figure 4, illustrating the front auxiliary wheel of the embodiment against the ground; Figure 6 is a partial cross-sectional view showing the auxiliary wheel device of the embodiment Figure 7 is a partial cross-sectional view showing a driving unit of the auxiliary wheel device of the embodiment, a safety buckle of the driving unit is located at a locking position; Figure 8 is a view similar to Figure 7, illustrating The safety buckle of the embodiment is located in an unlocked position; FIG. 9 is a view similar to FIG. 7, illustrating that an operation button of the embodiment is pressed and abuts against a linkage; FIG. 10 is a view similar to FIG. When the button is pressed for the two drives is deployed within a revenue ridge pole locating member unit; Figure 11 is a partial side elevational view showing the auxiliary wheel device of the embodiment in a folded position; and Figure 12 is a perspective view showing a seat unit, a handle, a frame and the auxiliary wheel device of the embodiment The folded aspect.

Referring to FIG. 2, an embodiment of a stroller having an auxiliary wheel device of the present invention includes a frame 2, two wheels 3, a handle 4, a seat unit 5, and an auxiliary wheel device 6.

The frame 2 includes an axle shaft 21 disposed adjacent to the ground and laterally disposed, and a spinal rod 22 disposed on the axle shaft 21 and extending upwardly and hollow.

The wheels 3 are respectively axially disposed at opposite ends of the axle shaft 21 and are rotatable on the ground, and the wheels 3 are slightly inclined toward each other inwardly. .

The handle 4 is disposed on the frame 2 and has an inverted U shape, which can be gripped and pushed or pulled by the stroller.

The seat unit 5 is disposed on the frame 2 for infants to ride.

The wheels 3, the handle 4 and the seat unit 5 are not important technical features of the present invention, and therefore will not be described in detail herein.

Referring to FIG. 3, the auxiliary wheel device 6 includes a front wheel frame 61 and a rear wheel frame 62 which are sleeved on the front and rear sides of the wheel axle 21, and two front auxiliary wheels 63 disposed on the front wheel frame 61. a rear auxiliary wheel 64 pivotally disposed on the rear wheel frame 62, a sliding member 65 slidably disposed on the ridge shaft 22 of the frame 2 and coupled to the front wheel frame 61 and the rear wheel frame 62, One The folding positioning member 66 and the control module 7 are disposed on the spinal rod 22 .

In this embodiment, since the rear auxiliary wheels 64 are respectively pivoted to the rear wheel frame 62 by a rotating shaft 641, the rear auxiliary wheels 64 are pivoted relative to the rear wheel frame 62 with the rotating shaft 641 as a center. Therefore, the stroller can perform the steering and turning motion, and the distance between the rear auxiliary wheels 64 and the wheels 3 is short, so that the radius of gyration of the embodiment is small compared to the conventional stroller. It has the advantage of good handling. It can be understood that the auxiliary wheel device 6 can also be provided with only a front auxiliary wheel 63 and a rear auxiliary wheel 64, and the purpose and effect of the embodiment can be achieved.

The auxiliary wheel device 6 is movable between a deployed position and a retracted position (see FIG. 11). In the deployed position, the sliding member 65 abuts against the axle 21, and the front wheel frame 61 and the rear The wheel frame 62 is adjacent to the ground and extends toward the front and the rear respectively. In the folding position, the sliding member 65 slides upward and away from the wheel axle 21, and the front auxiliary wheels 63 and the rear auxiliary wheels 64 are mutually Close and away from the ground.

Referring to FIG. 4 and FIG. 5, in the deployed position, the wheel center of one of the wheels 3 forms a wheel height D from the ground, and the front auxiliary wheel 63 and the rear auxiliary wheel 64 form a front wheel height d1 and a distance from the ground respectively. The wheel height d2, the wheel height D is greater than the average of the front wheel height d1 and the rear wheel height d2 (D>(d1+d2)/2), that is, the front auxiliary wheels 63 and the rear auxiliary wheels 64 cannot contact the ground at the same time, and when the stroller is moving, it can only roll with the wheels 3 (see Fig. 4), and the front auxiliary wheels 63 can be added to the wheels (or the rear auxiliary wheels 64). ) and moving in a tricycle-like mode (see Figure 5), when parking, only need to use the front auxiliary wheels 63 or the like The center of gravity of the auxiliary wheel 64 leans against the ground so that the stroller can stand without tilting forward or backward, and has the function of facilitating standing and avoiding the risk of dumping.

Referring to FIG. 3 and FIG. 6 , the sliding member 65 of the auxiliary wheel device 6 has a set of sliding body 651 disposed on the spinal rod 22 , and two pivotally connected to the sliding body 651 and pivotally connected to the front wheel frame 61 , respectively. And the linkage rod 652 of the rear wheel frame 62.

The sliding body 651 has a folding hole 653 for the folding positioning member 66 and two deployment holes 654 at the folding position.

In this embodiment, the folding positioning member 66 is a bead body, and the folding hole 653 is a circular hole, so that the bead body can be snapped into or out of the circular hole without additional control, it is understandable that The folding positioning member 66 and the folding hole 653 can also adopt other positioning methods, and the purpose and effect of the embodiment can be achieved as well.

The control module 7 has two expansion positioning members 71 disposed in the spinal rod 22 and partially protruding, and two elastic members 72 disposed in the spinal rod 22 and respectively abutting the deployment positioning members 71. The deployment locators 71 are brought into the drive unit 73 within the spine 22.

Referring to FIG. 6 , in the deployed position, the deployment positioning members 71 are outwardly projected by the elastic force of the elastic members 72 and are respectively engaged with the deployment holes 654 of the sliding body 651 to fix the sliding. When the body 651 is moved into the ridge 22 (see FIG. 10), the elastic force of the elastic members 72 can be restored to a state in which the ridge 22 is partially protruded.

Referring to FIG. 6 and FIG. 7 , the driving unit 73 has a linking member 731 which is disposed in the spinal rod 22 and has a slope 732. The second driving unit 73 is disposed on the linking member 731 and is respectively connected to the expanding positioning member 71. The transmission cable 733, an operation button 734 that can be pressed against the slope 732, and a safety buckle 735 disposed on the operation button 734.

Referring to Figures 7 and 8, the safety buckle 735 is movable between a locking position (Fig. 7) and an unlocking position (Fig. 8). In the locking position, the safety buckle 735 abuts against the spinal rod 22 The operation button 734 is externally limited, so that the operation button 734 cannot be pressed against the linkage member 731. In the unlocked position, the safety buckle 735 can protrude into the spinal rod 22, so that the operation button 734 can be Press and abut against the linkage 731.

Referring to FIG. 9 and FIG. 10, when the operation button 734 is pressed and abuts against the inclined surface 732 of the linkage 731, the linkage 731 can be lifted upward (compare FIGS. 8 and 9) by the transmission cables. 733 pulls the deployment positioning members 71 so that the deployment positioning members 71 can respectively compress the elastic members 72 to be received in the spinal rod 22 and disengage from the deployment hole 654 (see FIG. 6) to release the sliding. The fixing of the body 651 is moved.

Referring to FIGS. 10 and 11, when the deployment positioning members 71 are received in the spine 22, the sliding body 651 can be slid upwardly along the spinal rod 22, and the interlocking rods 652 are The front wheel frame 61 and the rear wheel frame 62 can be interlocked and adjacent to the spine 22 such that the front auxiliary wheels 63 and the rear auxiliary wheels 64 are away from the ground.

In summary, in operation, when the auxiliary wheel device 6 is to be moved from the deployed position to the folded position, the safety buckle 735 needs to be first used. Switching to the unlocked position, and then pressing the operation button 734 to cause the linkage 731 to be lifted to interlock the transmission cables 733, thereby pulling the deployment positioning members 71 away from the deployment holes 654, thus The user can operate the sliding body 651 to move to the folding position and then position by the folding positioning member 66 such that the front auxiliary wheel 63 and the rear auxiliary wheel 64 face toward the spinal rod 22 toward each other. On the contrary, the sliding body 651 can be disengaged from the folding positioning member 66 by directly pushing the sliding body 651, so that the sliding body 651 can be moved from the folding position to the deployed position to drive the sliding body 651. The front auxiliary wheels 63 and the rear auxiliary wheels 64 are deployed away from each other, so that the front auxiliary wheels 63 or the rear auxiliary wheels 64 can be in contact with the ground during the traveling of the stroller. With its convenient standing effect.

Referring to Fig. 12, when the auxiliary wheel device 6 is folded to the folding position, the handle 4 and the seat unit 5 can be folded, and the storage space can be further saved.

Through the above description, the advantages of this embodiment can be summarized as follows:

1. The frame 2 only needs to include the wheel axle 21 and the spine 22, so that the wheels 3 and the auxiliary wheel device 6 can be mounted at the same time, and the structure of the frame 2 can be surely simplified.

2. By the arrangement of the front auxiliary wheels 63 and the rear auxiliary wheels 64 with respect to the wheels 3, the stroller can be moved in the form of a two-wheel or a tricycle, and the balance can be maintained without falling, as compared with In the conventional four-wheeled stroller, the stroller with the auxiliary wheel device of the present invention can improve the mobility of the stroller without losing stability.

3. By the arrangement of the front wheel frame 61, the rear wheel frame 62 and the sliding member 65, the auxiliary wheel device 6 of the baby carriage can be folded from the deployed position to the folding position, so that the stroller can be applied. On general roads, beaches, narrow roads, and undulating terrain, depending on the environment in which they are used, on the other hand, storage space can be saved during storage.

4. The deployment positioning member 71 of the control module 7 can surely position the sliding member 65 in the deployed position, and the driving unit 73 can adjust the deployment positioning member 71 to enable the sliding member 65 to slide upward. Reach the purpose of the discount.

5. By the setting of the safety buckle 735 of the driving unit 73, the operation button 734 can be prevented from being loosened due to accidental contact or improper pressing.

6. By the short distance between the rear auxiliary wheels 64 and the wheels 3, the slewing radius is small compared to the conventional stroller, which has the advantage of good maneuverability.

As described above, the stroller having the auxiliary wheel device of the present invention can be applied to a variety of road surfaces, and is easy to fold and saves the storage space, and has the advantage of high stability, so that the object of the present invention can be achieved.

However, the above is only the embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made by the patent application scope and the patent specification of the present invention are still It is within the scope of the patent of the present invention.

2‧‧‧ frame

21‧‧‧ Wheel axle

22‧‧‧Spine

3‧‧‧ Wheels

6‧‧‧Auxiliary wheel device

61‧‧‧ front wheel frame

62‧‧‧ Rear wheel frame

63‧‧‧ front auxiliary wheel

64‧‧‧ rear auxiliary wheel

641‧‧‧ shaft

65‧‧‧Slipper

651‧‧‧Sliding body

652‧‧‧ linkage rod

653‧‧‧Collection hole

66‧‧‧Retracting positioning parts

7‧‧‧Control Module

Claims (10)

A baby carriage with an auxiliary wheel device, comprising: a frame, comprising a wheel axle disposed adjacent to the ground and laterally, and a spinal rod disposed on the axle shaft and extending upward; two wheels respectively disposed on the axle The opposite ends of the rods are rotatable on the ground; a handle is disposed on the frame; a seat unit is disposed on the frame; and an auxiliary wheel device includes sleeves disposed on the axle shaft and respectively located at the front and the rear a front wheel frame and a rear wheel frame, at least one front auxiliary wheel disposed on the front wheel frame, at least one rear auxiliary wheel disposed on the rear wheel frame, and a slidably sleeved on the spine of the frame Attached to the front wheel frame and the rear wheel frame sliding member, the auxiliary wheel device is movable between a deployed position and a folding position, and in the deployed position, the sliding member abuts against the wheel shaft. The front wheel frame and the rear wheel frame are adjacent to the ground and extend forward and backward respectively, but the front auxiliary wheel and the rear auxiliary wheel cannot simultaneously contact the ground. In the folded position, the sliding member slides upward and away from the ground. The axle axle, the front auxiliary wheel and the rear auxiliary wheel Close to and away from the ground. The stroller having the auxiliary wheel device according to claim 1, wherein, in the deployed position, half of the sum of the distance between the front auxiliary wheel and the rear auxiliary wheel and the ground is less than the center of the wheel of the one of the wheels The distance from the ground. The stroller having the auxiliary wheel device according to claim 1, wherein the auxiliary wheel device further comprises a folding positioning member disposed on the spinal rod, the sliding The moving member has a folding hole for clamping the folding positioning member for positioning the auxiliary wheel device in the folding position. The baby carriage with the auxiliary wheel device of claim 3, wherein the auxiliary wheel device further comprises a control module, the control module having two unfolding positioning members respectively disposed on the spinal rod, the sliding member further There are two deployment holes that can be respectively provided for the deployment positioning member in the deployed position for positioning the auxiliary wheel device in the deployed position. The stroller having the auxiliary wheel device according to claim 4, wherein the sliding member has a set of sliding bodies disposed on the spine and having the folding holes and the unfolding holes, and the two are pivotally connected thereto. Sliding the body and pivoting the front wheel frame and the linkage rod body of the rear wheel frame respectively. The baby carriage with the auxiliary wheel device of claim 5, wherein the deployment positioning members are pivotally disposed in the hollow ridge and partially protruded to respectively engage the deployment holes, the control module There is also a drive unit disposed on the spine and enabling the raised portions of the deployed locator to be received within the spine. The stroller having the auxiliary wheel device according to claim 6, wherein the driving unit has a linking member disposed in the spine, an operating button that can be pressed and can be abutted against the linking member, and two The linkages are respectively connected to the transmission cables of the deployment positioning members. The stroller having the auxiliary wheel device according to claim 7, wherein the linking member has a slope which can be abutted by the operating button, and when the operating button is pressed to abut the inclined surface, the linking member can be interlocked Move up and pull the cables. The baby carriage with the auxiliary wheel device of claim 8, wherein the driving unit further has a safety buckle disposed on the operation button, and the safety buckle is movable between a locking position and an unlocking position. When the position is locked, the safety buckle is pressed against the outside of the spinal rod to limit the operation button, so that the operation button cannot be pressed against the linkage member. In the unlocked position, the safety buckle can extend into the spinal rod. Inside, the operating button can be pressed and abutted against the linking member. The baby carriage with the auxiliary wheel device of claim 5, wherein the control module further has two disposed in the spine and respectively abuts against the unfolding positioning members, and the unfolding positioning members are outwardly The protruding elastic members are capable of returning to a state partially protruding from the spinal rod after the deployment positioning members are respectively received by the spinal rod.