CN109606021B - Locking mechanism, wheel locking mechanism and child stroller with wheel locking mechanism - Google Patents

Abstract

The present invention discloses a locking mechanism, a wheel locking mechanism and a child stroller with a wheel locking mechanism, comprising a swing block swingably connected to a first component through a swing shaft and always kept perpendicular to a horizontal plane under the action of gravity, and a second component with a locking groove, wherein the swing block has a locking portion that can be detachably connected to the locking groove, and the first component and the second component have a common reference plane, when the locking mechanism is in an unlocked state, the reference plane forms a first angle with the horizontal plane, the locking portion of the swing block is detached from the locking groove, and the first component and the second component are unlocked; when the locking mechanism is in a locked state, the reference plane forms a second angle with the horizontal plane, and the locking portion of the swing block enters the locking groove under the action of gravity, and the first component and the second component are locked. In the present invention, under the action of gravity, locking and unlocking can be automatically completed simultaneously with the folding and opening of the child stroller, without the need for additional steps, and the structural design is simple and ingenious.

Description

Locking mechanism, wheel locking mechanism and child stroller with wheel locking mechanism

Technical Field

The invention relates to a locking mechanism, a wheel locking mechanism and a child stroller with the wheel locking mechanism.

Background technique

The stroller includes a foldable and unfoldable frame, a seat connected to the frame, wheels connected to the bottom of the frame, and a locking structure for locking the frame in an unfolded state. In order to facilitate the turning of the stroller while traveling, at least one set of wheels of the stroller is capable of universal rotation. In general, the front wheels of a one-way stroller are universal wheels, while the front and rear wheels of a reversible stroller are universal wheels, and the universal rotation of the front wheels or the rear wheels can be locked according to the different directions in which the stroller is pushed.

The universal rotation in the prior art is generally achieved by the following structure: the wheel is mounted on the wheel connector, and the wheel connector is pivotally connected to the frame through a rotating shaft. The disadvantage of this structure is that when the child stroller is folded, the wheel connector (and the wheel) will still rotate around the rotating shaft, causing an impact on the user. If a locking structure is added between the wheel connector and the frame, the user will have to add more steps to fold and unfold the frame.

Summary of the invention

In order to solve the above problems, an object of the present invention is to provide a locking mechanism, a wheel locking mechanism and a child stroller having the wheel locking mechanism.

In order to achieve the above object, the technical solution adopted by the present invention is: a locking mechanism, comprising a swing block swingably connected to a first component through a swing shaft and always kept perpendicular to a horizontal plane under the action of gravity, and a second component having a locking groove, the swing block having a locking portion that can be detachably connected to the locking groove, assuming that the first component and the second component have a common reference plane,

When the locking mechanism is in an unlocked state, the reference plane and the horizontal plane form a first angle, the locking portion of the pendulum block is disengaged from the locking groove, and the first component and the second component are unlocked; when the locking mechanism is in a locked state, the reference plane and the horizontal plane form a second angle, the locking portion of the pendulum block enters the locking groove under the action of gravity, and the first component and the second component are locked.

Furthermore, when the locking mechanism transitions from the unlocked state to the locked state, the angle between the lock groove and the horizontal plane changes, and the pendulum block causes the locking portion to enter the lock groove under the action of gravity.

Furthermore, the first component and the second component are pivotally connected via a rotating shaft, and the reference plane is a plane perpendicular to the axis of the rotating shaft.

Furthermore, a slide groove connected to the locking groove is provided on the second component. When the locking mechanism is in an unlocked state, the locking part of the pendulum block can be slidably located in the slide groove. When the locking mechanism is in a locked state, the locking part of the pendulum block disengages from the slide groove and enters the locking groove.

Furthermore, when the reference plane forms a second angle with the horizontal plane, and the first component and the second component move relative to a certain relative position relationship, the pendulum block moves with the first component to a position corresponding to the locking groove, and the locking part disengages from the slide groove and enters the locking groove under the action of gravity.

Furthermore, the first component is pivotally connected to the second component via a rotating shaft, and the slide groove is annular.

Furthermore, the swing block is rotatably connected to the base via a swing shaft, the base is arranged inside the first component, and the base is pivotally connected to the second component via a rotating shaft.

Furthermore, the swing shaft is located at the upper part of the swing block, and the locking part is located at the lower part of the swing block.

The present invention also provides another technical solution: a wheel locking mechanism for a child stroller based on the above-mentioned locking mechanism, wherein the above-mentioned first component is a wheel support rod, and the above-mentioned second component is a wheel connecting member on which a wheel is installed, or the first component is a wheel connecting member, and the second component is a wheel support rod; the wheel support rod and the wheel connecting member are pivotally connected via a rotating shaft, and the reference plane is a plane perpendicular to the axis centerline of the rotating shaft.

Furthermore, the child stroller includes an openable and foldable frame, the frame includes the above-mentioned wheel support rods, when the frame is in the open state, the wheel locking mechanism is in the unlocked state; when the frame is in the folded state, the wheel locking mechanism is in the locked state.

Furthermore, when the frame is in the open state, the rotating shaft extends in the up-down direction.

The present invention also provides a technical solution: a child stroller with the above-mentioned wheel locking mechanism, when the frame is in an open state, the wheel locking mechanism is in an unlocked state; when the frame is in a folded state, the wheel locking mechanism is in a locked state.

Further, when the frame is in the folded state, the frame is self-standing on the ground.

Due to the adoption of the above technical solution, the locking mechanism, wheel locking mechanism and child stroller with wheel locking mechanism of the present invention can achieve locking by changing the angle between the entire mechanism and the horizontal plane, and the pendulum block automatically enters the locking groove under the action of gravity. When applied to a child stroller, the angle change of the rod when the stroller is folded can be utilized to automatically lock under the action of gravity to achieve the orientation of the wheel, so that after the stroller is folded, the wheel no longer rotates around the rotating shaft between it and the frame. Locking and unlocking can be automatically completed at the same time as the folding and opening of the child stroller, without the need for additional steps to operate, and the structural design is simple and ingenious.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the structure of the locking mechanism and the wheel locking mechanism in the present invention when they are in the unlocked state;

Figure 2 is a schematic diagram of the partial structure of A in Figure 1;

Figure 3 is a schematic diagram of the longitudinal cross-sectional structure of Figure 1;

Figure 4 is a schematic diagram of the top view of the wheel connector and the wheel;

FIG5 is a schematic structural diagram of the locking mechanism and the wheel locking mechanism in the present invention in a locked state;

Figure 6 is a schematic diagram of the partial structure of B in Figure 5;

Figure 7 is a schematic diagram of the longitudinal cross-sectional structure of Figure 5;

FIG8 is a schematic structural diagram of a child stroller with a wheel locking mechanism in the present invention when in an open state;

Figure 9 is a side view of the structure of Figure 8;

FIG10 is a schematic structural diagram of a child stroller with a wheel locking mechanism in the present invention when in a folded state;

Figure 11 is a side structural schematic diagram of Figure 10.

The numbers in the figure are:

1. Swing block; 2. Locking slot; 3. Slide slot; 4. Base; 5. Rotating shaft; 6. Wheel support rod; 7. Wheel connecting piece; 8. Wheel.

Detailed ways

The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art.

As can be seen from the structural schematic diagrams of Figures 1 to 7, the locking mechanism in this embodiment is used to lock or unlock two components. The locking mechanism includes a pendulum block 1 that is swingably connected to the first component through a swing axis and always remains perpendicular to the horizontal plane under the action of gravity, and a second component having a lock slot 2. The pendulum block 1 has a locking portion that can be detachably connected to the lock slot 2. Assume that the first component and the second component have a common reference plane. When the angle between the reference plane and the horizontal plane changes, the angles between the first component and the second component and the horizontal plane both change. It is not limited here whether the first component and the second component have a relative motion relationship with the reference plane.

When the locking mechanism is in the unlocked state, the first component and the second component form a first angle with the horizontal plane, the locking portion of the pendulum block 1 is disengaged from the locking groove 2, and the first component and the second component are unlocked; when the locking mechanism is in the locked state, the first component and the second component form a second angle with the horizontal plane, and there is an angle difference greater than 0 between the second angle and the first angle. Under the action of gravity, the locking portion of the pendulum block 1 enters the locking groove 2, and the first component and the second component are locked. Specifically, when the locking mechanism transitions from the unlocked state to the locked state, the angle of the locking groove 2 with the movement of the second component changes with the horizontal plane, but the pendulum block 1 rotates around the swing axis under the action of gravity and always remains vertical, so that the locking portion enters the locking groove 2. The size of the above-mentioned angle difference is sufficient to enable the locking portion of the pendulum block 1 to enter the locking groove 2.

Specifically, the first component and the second component are pivotally connected via the rotating shaft 5 , and the reference plane is a plane perpendicular to the axis of the rotating shaft 5 .

In a more preferred embodiment, the second component is provided with a slide groove 3 connected with the lock groove 2, and when the locking mechanism is in an unlocked state, the locking portion of the pendulum block 1 can be slidably located in the slide groove 3, and when the locking mechanism is in a locked state, the locking portion of the pendulum block 1 is separated from the slide groove 3 and enters the lock groove 2. Specifically, when the reference plane forms a second angle with the horizontal plane, and the first component and the second component move relative to a certain relative position relationship, the pendulum block 1 moves with the first component to a position corresponding to the lock groove 2, and the locking portion is separated from the slide groove 3 and enters the lock groove 2 under the action of gravity.

In this embodiment as shown in Figures 1 to 7, the first component and the second component are pivotally connected through a rotating shaft 5, and the rotation relationship between the first component and the second component is limited by a locking mechanism. Accordingly, the above-mentioned slide groove 3 is annular. The pendulum block 1 in this embodiment is rotationally connected to the base 4 through a swing shaft, and the base 4 is arranged inside the first component, and the base 4 is pivotally connected to the second component through the rotating shaft 5. In this embodiment, the locking groove 3 is located on the outside of the annular slide groove 3, and the pendulum block 1 is located on the front side of the base 4. The locking groove 3 can also be arranged on the inside of the slide groove 3, and the pendulum block 1 is arranged on the other side of the base 4.

In this embodiment, the first component is located above the second component, that is, the locking groove 2 and the sliding groove 3 are located below the pendulum block 1, so accordingly, the swing shaft is set at the upper part of the pendulum block 1, and the locking part is set at the lower part of the pendulum block 1, specifically, the locking part is the lower end of the pendulum block 1. In practical applications, according to specific needs and the upper and lower positions of the first component and the second component, the locking part can be set at the upper part of the pendulum block 1, and a counterweight can be added to the lower part of the pendulum block 1, so that the locking part at the upper part is connected to or separated from the locking groove above it.

The locking mechanism can be used for baby strollers, cribs, children's dining chairs, walkers, etc.

This embodiment also provides a wheel locking mechanism for a child stroller based on the above locking mechanism, with reference to Figures 1 to 7, the above first component is a wheel support rod 6, the above second component is a wheel connector 7 with a wheel 8 mounted thereon, and the wheel support rod 6 and the wheel connector 7 are pivotally connected via a rotating shaft 5. The reference plane is assumed to be a plane perpendicular to the axis of the rotating shaft 5.

Or the first component mentioned above is the wheel connecting member 7, the pendulum block 1 is arranged on the wheel connecting member 7, the second component is the wheel support rod 6, the locking groove 2 and the sliding groove 3 are arranged on the wheel support rod 6, specifically, the locking groove 2 and the sliding groove 3 are opened on the base 4.

The child stroller comprises an openable and foldable frame, the frame comprises a wheel support rod 6, when the frame is in an open state, the wheel locking mechanism is in an unlocked state; when the frame is in a folded state, the wheel locking mechanism is in a locked state.

In this embodiment, when the frame is in the open state, the shaft 5 extends in the up-down direction, and the wheel connector 7 and the wheel 8 rotate relative to the wheel support rod 6 around the shaft 5. Specifically, when the frame is in the folded state, the shaft 5 still extends in the up-down direction, but the angle is slightly changed relative to when the frame is opened, so that the locking portion of the pendulum block 1 can enter the locking groove 2.

The wheel locking mechanism is applicable to a wide range of frame structures. In practical applications, a frame structure in the prior art can be selected according to specific requirements.

This embodiment also provides a child stroller with the wheel locking mechanism, and with reference to FIGS. 8 to 11, an existing specific frame structure and a front wheel are used as an example for explanation, the wheel 8 is the front wheel, and the wheel bracket 7 is the front bracket. In practical applications, it is not limited to the frame structure shown in FIGS. 8 to 11.

When the frame is in the open state, the wheel locking mechanism is in the unlocked state; when the frame is in the folded state, the wheel locking mechanism is in the locked state.

In this embodiment, when the frame is in the folded state, the frame stands on the ground by itself, and the rotation axis of the wheel 8 is arranged in the left-right direction. By orienting the wheel 8 when the frame is folded, the frame stands by itself after folding.

The working principle of the locking mechanism, wheel locking mechanism and child stroller with wheel locking mechanism:

When the frame is in the open state, the locking part of the pendulum block 1 is located in the slide groove 3. When the wheel connector 7 and the wheel 8 rotate relative to the wheel support rod 6 around the rotation axis 5, the locking part of the pendulum block 1 slides in the annular slide groove 3. Due to the effect of gravity, the pendulum block 1 always remains perpendicular to the horizontal plane. Even if the locking part slides in the slide groove 3 to a position corresponding to the locking groove 2, it will not enter the locking groove 2. When the frame is folded, the wheel support rod 6 rotates, and drives the wheel connector 7 to change its angle with the horizontal plane. The locking groove 2 changes its angle with the horizontal plane along with the wheel connector 7. When the pendulum block 1 moves with the wheel support rod 6, it always remains perpendicular to the horizontal plane due to the effect of gravity. When the wheel connector 7 rotates around the rotation axis 5 to make the locking groove 2 correspond to the position of the pendulum block 1, the locking part at the lower end of the pendulum block 1 automatically enters the locking groove 2 under the effect of gravity, thereby locking the relative position relationship between the wheel support rod 6 and the wheel connector 7. The wheel connector 7 and the wheel 8 cannot rotate around the rotation axis 5, and the orientation of the wheel 8 is achieved.

The locking mechanism, wheel locking mechanism and child stroller with wheel locking mechanism of the present invention can realize locking by changing the angle between the whole mechanism and the horizontal plane, and the swing block automatically enters the locking groove under the action of gravity. When applied to a child stroller, the angle change of the rod when the stroller is folded can be utilized to automatically lock under the action of gravity to realize the orientation of the wheel, so that after the stroller is folded, the wheel no longer rotates around the rotating shaft between the wheel and the frame. Locking and unlocking can be automatically completed at the same time as the folding and opening of the child stroller, and no additional steps are required for operation. The structural design is simple and ingenious.

The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. A wheel locking mechanism of a stroller, the stroller comprising an openable and foldable frame, the frame comprising a wheel strut (6) and a wheel connector (7) provided with wheels (8), the wheel locking mechanism being used for locking or unlocking the two components of the wheel strut (6) and the wheel connector (7), one of the two components of the wheel strut (6) and the wheel connector (7) being a first component, and the other component being a second component, the wheel locking mechanism being characterized in that: the wheel locking mechanism comprises a swinging block (1) which is connected to the first component in a swinging way through a swinging shaft and always keeps vertical to the horizontal plane under the action of gravity, and a second component with a locking groove (2), wherein the swinging block (1) is provided with a locking part which can be detachably connected with the locking groove (2),

The wheel support rod (6) and the wheel connecting piece (7) are connected in a pivoting way through the rotating shaft (5), the wheel support rod (6) and the wheel connecting piece (7) have a common reference plane, the reference plane is a plane perpendicular to the axis of the rotating shaft (5),

The second component is provided with a sliding groove (3) communicated with the locking groove (2), when the frame is in an open state, the wheel locking mechanism is in an unlocking state, the reference plane and the horizontal plane form a first included angle, the locking part of the swinging block (1) is separated from the locking groove (2), the first component and the second component are unlocked, and the locking part of the swinging block (1) is slidably positioned in the sliding groove (3); when the frame is in a folding state, the wheel locking mechanism is in a locking state, the reference plane and the horizontal plane form a second included angle, an angle difference larger than 0 is formed between the second included angle and the first included angle, the swinging block (1) is under the action of gravity, the locking part of the swinging block (1) is separated from the sliding groove (3) and enters the locking groove (2), and the first component and the second component are locked.

2. The stroller wheel locking mechanism of claim 1, wherein: when the wheel locking mechanism is transited from the unlocking state to the locking state, the angle between the locking groove (2) and the horizontal plane is changed, and the swinging block (1) enables the locking part to enter the locking groove (2) under the action of gravity.

3. The stroller wheel locking mechanism of claim 1, wherein: when the reference plane and the horizontal plane form a second included angle, and the first component and the second component relatively move to a certain relative position, the swinging block (1) moves along with the first component to correspond to the locking groove (2), and the locking part is separated from the sliding groove (3) under the action of gravity and enters the locking groove (2).

4. The stroller wheel locking mechanism of claim 1, wherein: the sliding groove (3) is annular.

5. The stroller wheel locking mechanism of claim 4, wherein: the swinging block (1) is rotatably connected to the base (4) through a swinging shaft, the base (4) is arranged in the first component, and the base (4) is pivotally connected with the second component through the rotating shaft (5).

6. The stroller wheel locking mechanism of claim 1, wherein: the swing shaft is positioned at the upper part of the swing block (1), and the locking part is positioned at the lower part of the swing block (1).

7. The stroller wheel locking mechanism of claim 1, wherein: when the frame is in an open state, the rotating shaft (5) extends along the up-down direction.

8. A stroller having a wheel locking mechanism according to any one of claims 1-7, wherein: when the frame is in an open state, the wheel locking mechanism is in an unlocked state; when the frame is in the folded state, the wheel locking mechanism is in a locked state.

9. The stroller of claim 8, wherein the wheel locking mechanism comprises: when the frame is in a folded state, the frame is self-standing on the ground.