阅读说明：本技术 婴儿推车的控制方法以及使用该方法的婴儿推车 (Control method of baby stroller and baby stroller using same ) 是由 李自强 夏孙城 浅野顺一 陈伟基 于 2019-09-17 设计创作，主要内容包括：本发明揭示了一种婴儿推车的控制方法以及使用该方法的婴儿推车。婴儿推车具备把手和传感器和车轮,在把手上设有按钮,该控制方法的特征在于,包括以下步骤：智能刹车启动步骤,通过长按所述按钮而启动智能刹车模式；触摸检测步骤,传感器对把手是否被触摸进行检测；路况判断步骤,在传感器检测到把手没有被触摸的情况下对路况进行判断；刹车距离计算步骤,根据所判断的路况而计算对应的刹车距离；刹车步骤,根据所计算的刹车距离而在婴儿推车前进了该刹车距离之后刹车；提示步骤,在刹车后以音频对已进行刹车进行提示。根据本发明所提供的婴儿推车的控制方法以及使用该方法的婴儿推车,设计简单合理,能消除婴儿推车的安全隐患。(The invention discloses a control method of a baby stroller and the baby stroller using the method. The baby stroller comprises a handle, a sensor and wheels, wherein the handle is provided with a button, and the control method is characterized by comprising the following steps: an intelligent brake starting step, wherein an intelligent brake mode is started by long pressing the button; a touch detection step, wherein a sensor detects whether the handle is touched; a road condition judging step, namely judging the road condition when the sensor detects that the handle is not touched; a braking distance calculating step, calculating the corresponding braking distance according to the judged road condition; a braking step of braking after the stroller has advanced by the braking distance according to the calculated braking distance; and a prompting step, namely prompting the braking with audio after the braking. The control method of the baby stroller and the baby stroller using the method provided by the invention have simple and reasonable design and can eliminate the potential safety hazard of the baby stroller.)

1. A control method of a stroller including a handle, a sensor, and wheels, the handle having a button, the control method comprising the steps of:

an intelligent brake starting step, wherein an intelligent brake mode is started by long pressing the button;

a touch detection step, wherein a sensor detects whether the handle is touched;

a road condition judging step, namely judging the road condition when the sensor detects that the handle is not touched;

a braking distance calculating step, calculating the corresponding braking distance according to the judged road condition;

a braking step of braking after the stroller has advanced by the braking distance according to the calculated braking distance;

and a prompting step, namely prompting the braking with audio after the braking.

2. The control method according to claim 1,

in the road condition judging step, an angle between the stroller and the ground is calculated based on the three-axis acceleration measurement value and the three-axis angular velocity measurement value, when the sensor detects that the angle between the stroller and the ground is smaller than a specified angle, the road condition is judged to be flat, and when the sensor detects that the angle between the stroller and the ground is larger than or equal to the specified angle, the road condition is judged to be a slope.

3. The control method according to claim 2,

when the road condition is judged to be flat in the road condition judging step, the following steps are carried out in the braking distance calculating step:

calculating the induction distance of the handle;

calculating the moving distance of a brake lock pin of the wheel;

calculating the rolling arc length distance of the wheel;

and adding the handle sensing distance, the moving distance of the brake lock pin and the arc length distance to obtain a first brake distance.

4. The control method according to claim 2,

when the road condition is judged to be a slope in the road condition judging step, the following steps are carried out in the braking distance calculating step:

and calculating the slope moving distance, and taking the slope moving distance as a second braking distance.

5. The control method according to claim 3,

the handle sensing distance is a distance obtained by multiplying the handle sensing time by the moving speed of the stroller.

6. The control method according to claim 3,

the moving distance of the brake lock needle is obtained by multiplying the moving time of the brake lock needle arranged on the wheel by the moving speed of the baby stroller.

7. The control method according to claim 3,

the arc length distance is the arc length distance of the rolling wheel after the sensor detects that the level of the induction magnet arranged on the wheel changes three times.

8. A baby stroller is characterized in that a stroller body is provided,

use of a method of controlling a stroller according to any of claims 1 to 7 to control the brakes of the stroller.

Technical Field

The invention relates to a control method of a baby stroller and the baby stroller using the method.

Background

The baby stroller is a necessary product when parents take a baby to go out. The traditional baby stroller adopts a wheel foot-stepping type brake mode, a user needs to hold the baby stroller when the baby stroller stops completely, the user can release the hand after the baby stroller stops by stepping on a foot brake, the user needs to hold the foot brake for lifting the foot brake before pushing the baby stroller, and then the baby stroller can move.

In order to solve the above technical problem, a baby stroller with a hand brake mode has appeared in the prior art, for example, the utility model patent with the publication number of CN 203805967U discloses a baby stroller, which comprises: the brake device comprises a brake assembly and a brake steel wire, wherein the brake assembly is used for controlling the rotation or stop of the wheel, and the brake steel wire is used for driving the brake assembly to work; the handle comprises a lower handle fixedly arranged on the frame and an upper handle hinged on the lower handle, an elastic device is arranged at the hinged position of the upper handle and the lower handle, and the upper handle and the lower handle are mutually opened under the action of the elastic device; the end part of the upper handle is connected with the end part of the brake steel wire, the upper handle is pressed downwards and is pressed with the lower handle, so that the brake steel wire is pulled to generate displacement, the brake assembly is driven to be separated from the wheel, and the wheel can rotate; after the upper handle is loosened, the upper handle is automatically reset, and the brake assembly is driven to clamp the wheel, so that the wheel stops rotating. The patent is safe and convenient to use. However, the baby stroller described in the above patent requires both hands to pull the hand brake when braking, which is inconvenient to operate and tedious in action. Meanwhile, if a user forgets to step on the brake at a slope road section, the baby stroller can slide, the baby stroller is turned over, crashes and the like, the baby in the stroller is greatly injured, and great potential safety hazards exist.

In addition, in the prior art, a mechanical key triggering brake mode is adopted for a part of baby strollers, the mode is complex in structure and high in cost, and appearance components need to be additionally arranged to damage the appearance of the whole stroller; and the waterproof and dustproof effects cannot be realized, and the internal mechanism is easily damaged, so that the performance of the whole vehicle is influenced.

Therefore, based on the defects in the prior art, the improved control method of the baby stroller and the baby stroller using the method are provided, the structural design is simple and reasonable, the potential safety hazard of the baby stroller can be eliminated, the baby stroller has an automatic braking function, and the technical problem to be solved by the technical personnel in the field is urgently solved.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a control method of a baby stroller and the baby stroller using the control method, which has simple and reasonable design and can eliminate the potential safety hazard of the baby stroller. According to the invention, when the baby stroller is applied to application scenes such as escalators, subway station platform sides, roadside sides, railway station platforms and the like, the hidden danger that the stroller accidentally slides on the flat ground and slides on a slope can be solved, and the safety performance of babies is higher.

In order to achieve the purpose, the invention provides the following technical scheme: a control method of a stroller including a handle, a sensor, and wheels, the handle having a button, the control method comprising the steps of:

an intelligent brake starting step, wherein an intelligent brake mode is started by long pressing the button;

a touch detection step, wherein a sensor detects whether the handle is touched;

a road condition judging step, namely judging the road condition when the sensor detects that the handle is not touched;

a braking distance calculating step, calculating the corresponding braking distance according to the judged road condition;

a braking step of braking after the stroller has advanced by the braking distance according to the calculated braking distance;

and a prompting step, namely prompting the braking with audio after the braking.

The control method of the baby stroller and the baby stroller using the method provided by the invention have the advantages of simple and reasonable design, capability of eliminating potential safety hazards of the baby stroller and great economic benefit and safety benefit.

Drawings

Fig. 1 is a schematic view of a control method of a stroller according to a first embodiment of the present invention.

Fig. 2 is a schematic view of a button portion of a handle of a stroller to which the first embodiment of the present invention is applied.

Fig. 3 is a schematic view of the entire stroller to which the first embodiment of the present invention is applied.

Fig. 4 is a schematic diagram of a road condition determining step in the brake control method of fig. 1.

Fig. 5 is a schematic view illustrating braking of the stroller when the road condition is flat.

Fig. 6 is a schematic view of the stroller braking when the road condition is on an incline.

Fig. 7 is a schematic view of a braking distance calculation step at the time of flat ground in the braking control method of fig. 1.

Fig. 8 is another schematic view of a braking distance calculating step in the flat ground time in the braking control method of fig. 1.

Fig. 9 is another schematic view of a braking distance calculating step in the flat ground time in the braking control method of fig. 1.

Fig. 10 is a schematic diagram of a braking distance calculation step at the time of a slope in the braking control method of fig. 1.

Detailed Description

The technical solution of the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention.

A first embodiment of the present invention is a control method for a stroller.

Fig. 1 is a schematic view of a control method of a stroller according to a first embodiment of the present invention. Fig. 2 is a schematic view of a button portion of a handle of a stroller to which the first embodiment of the present invention is applied. Fig. 3 is a schematic view of the entire stroller to which the first embodiment of the present invention is applied. As shown in fig. 1, the control method includes: the method comprises an intelligent brake starting step, a touch detection step, a road condition judgment step, a brake distance calculation step, a brake step and a prompt step.

The stroller shown in fig. 3 to which the control method is applied is provided with a handle, as shown in fig. 2, two buttons are arranged on the handle, wherein the button on the left side is an intelligent brake mode switching button, and the button on the right side is a front LED lamp switching button. Both buttons are provided with prompting lamps and are respectively powered by a rechargeable battery and a No. 7 battery. When the rechargeable battery is low, the lamp on the left button is turned on to be red. When the No. 7 battery is low in power, the lamp on the button on the right side is turned on to be red. The right front LED lamp switching button is used to control turning on/off of the LED lamp on the front side of the stroller, and will not be described in detail. In addition, a handle LED strip is provided on the handle, which, as shown in fig. 2, extends in the horizontal direction, almost over the entire handle and encloses the two push buttons inside. In the intelligent braking starting step, the intelligent braking mode is started by long-pressing the left button. Specifically, the left button is held down until the light on the button is blue, thereby initiating the smart braking mode.

The stroller shown in fig. 3 also includes a sensor that illuminates the handle when the handle is touched. At this moment, the handle LED strip lights up to be blue, and goes out after a few seconds. In the touch detection step, the sensor detects whether the handle is touched. And if the handle is not touched, judging the road condition.

In the step of determining the road condition, the road condition is determined, for example, whether the road condition is a flat ground or a slope is determined, but the determined road condition is not limited thereto, and may be other road conditions. The calculation of the angle of the stroller to the ground is described with reference to fig. 4.

As shown in FIG. 4, the three-axis acceleration measurements and the three-axis angular velocity measurements of the six-axis sensor are first read and comparedThe measured values are filtered to improve accuracy. Then, the change value Δ Aacc of the current angle from the last angle measurement is calculated using the acceleration measurement value, and the change value Δ agro of the current angle from the last angle measurement is calculated using the angular velocity measurement value integration. Then, according to the change situation of the acceleration value and the angular velocity value, an acceleration value weight Wacc and an angular velocity value weight Wgyro are calculated, wherein Wacc + Wgyro is 1, and the angle change value Δ a is obtained by carrying out weighted average on the angle change calculated by the acceleration value and the angular velocity value through a calculation formula Δ a of Wacc × Δ Aacc + Wgyro × Δ agro. Finally, according to the last angle value A_n-1Obtaining the angle value A calculated at this time by the angle change value delta A at this time_n，A_n＝ΔA+A_n-1. Angle value A_nEqual to the angle theta of the stroller to the ground. With such a calculation method using the six-axis sensor, the accuracy of the calculated angle θ is higher.

When the angle theta between the baby stroller and the ground is smaller than the specified angle, the road condition is judged to be flat, and when the angle theta between the baby stroller and the ground is larger than or equal to the specified angle, the road condition is judged to be a slope. The predetermined angle may be, for example, 3 °, but is not limited thereto, and may be other angles.

Fig. 5 is a schematic view illustrating braking of the stroller when the road condition is flat. Fig. 6 is a schematic view of the stroller braking when the road condition is on an incline. Fig. 7 is a schematic view of a braking distance calculation step at the time of flat ground in the braking control method of fig. 1. Fig. 8 is another schematic view of a braking distance calculating step in the flat ground time in the braking control method of fig. 1. Fig. 9 is another schematic view of a braking distance calculating step in the flat ground time in the braking control method of fig. 1.

In the braking distance calculating step, the corresponding braking distance is calculated according to the judged road condition. Specifically, for example, when the road condition is determined to be flat in the road condition determining step, the handle sensing distance L1 is calculated, the brake pin moving distance L2 of the wheel 14 is calculated, the arc length distance L3 over which the wheel 14 rolls is calculated, and the handle sensing distance L1, the brake pin moving distance L2, and the arc length distance L3 are added to each other to obtain the first braking distance L. The handle sensing distance L1 is, for example, a distance obtained by multiplying the handle sensing time t1 by the moving speed v of the stroller. The brake lock pin moving distance L2 is, for example, a distance obtained by multiplying the moving time t2 of the brake lock pin provided on the wheel 14 by the moving speed v of the stroller. As shown in fig. 8 and 9, the arc length distance L3 is the arc length distance of the wheel 14 rolling after the sensor detects three changes in the level of the induction magnet 12 provided on the wheel 14. The calculation principle of arc long distance L3 is explained below based on the drawings. As shown in fig. 7, a circle symbol represents an induction magnet, a square symbol represents a sensor, the sensor outputs a low level when the induction magnet is far from the sensor, the sensor outputs a high level when the induction magnet is near to the sensor, the induction magnet moves from a position far from the sensor to a direction close to the sensor, and then moves to a position closest to the sensor and then moves to a direction far from the sensor, and in the process, the level of the sensor changes to low → high → low. As shown in fig. 8 and 9, assuming that the wheel is divided into 6 sectors, three induction magnets 12 are uniformly distributed on the wheel 14 at intervals of approximately 120 °, the sensor moves around the center of the wheel, and each induction magnet is moved toward and away from the wheel, so that there are 2 level changes when passing through each induction magnet, and the sensor makes a turn around the wheel, and there are 6 level changes in total. When the wheel is divided into 6 sectors as shown, the level changes 1 time for every two sector boundaries crossed by the sensor movement. Specifically, when the sensor recognizes braking after 3 level changes, the arc length distance L3 is, for example, 1/3 π D ≦ L3 ≦ 1/2 π D, where D is the diameter of the wheel 14. For example, when the wheel diameter D is 150mm and the wheel circumference C is 471.24mm, the value of L3 is 157.08mm to 235.62mm as can be seen from the above calculation. The moving speed v of the pushchair is generally 4.0-5.0 km/h. In this case, when the handle sensing time t1 is 0.02s, the moving time t2 of the brake lock pin is 0.25s, and the moving speed v of the stroller is 1.1m/s, which is 4.0km/h, it can be seen from the above calculation that the first braking distance L is L1+ L2+ L3, and thus the value of the first braking distance L ranges from 454.08mm to 532.62 mm.

Fig. 10 is a schematic diagram of a braking distance calculation step at the time of a slope in the braking control method of fig. 1. For example, when the road condition is determined to be a slope in the road condition determining step, the moving distance of the slope is calculated, and the moving distance of the slope is taken as the second braking distance L'. As shown in fig. 10, when the angle between the stroller and the ground is θ, the acceleration a of the stroller is gsin θ, the moving time t of the stroller is t1+ t2, and the braking distance L' is 1/2at when the friction force is neglected². For example, when the moving time t is 0.32s and the angle θ is 12 °, the braking distance L' has a value of about 104mm according to the above calculation method.

In the braking step, braking is performed after the stroller is advanced by the braking distance according to the calculated braking distance. Specifically, for example, as shown in fig. 5, when the road condition is determined to be level ground, the stroller is braked after the first braking distance L when the stroller is moved forward to level ground in the braking step, based on the calculated first braking distance L when the road condition is level ground, as shown in fig. 6, when the road condition is determined to be a slope, the stroller is braked after the second braking distance L ' when the stroller is moved forward to the slope in the braking step, based on the calculated second braking distance L ' when the road condition is determined to be a slope, and the first braking distance L when the road condition is level ground is greater than the second braking distance L ' when the stroller is moved forward to the slope. The braking distance L in the case of flat ground is, for example, preferably 450-. The braking distance L' in the case of a slope is, for example, preferably 75 to 145mm, and more preferably 80 mm.

In the prompting step, after braking, the fact that braking is performed is prompted through audio. For example, after braking, a click can be heard to confirm that the brake has been applied.

As described above, with the control method of the stroller of the first embodiment, the brake is automatically applied as long as the stroller is moved forward by a certain distance in the case that the hand is separated from the handle of the stroller, thereby ensuring that the baby is not endangered by the fact that the stroller is slid too long.

A second embodiment of the present invention is a stroller. The stroller controls the braking of the stroller using the control method of the stroller in the first embodiment. Therefore, the second embodiment can obtain the same effects as those of the first embodiment, and will not be described herein again.

It should be noted that, each unit mentioned in each device embodiment of the present invention is a logical unit, and physically, one logical unit may be one physical unit, or may be a part of one physical unit, or may be implemented by a combination of multiple physical units, and the physical implementation manner of these logical units itself is not the most important, and the combination of the functions implemented by these logical units is the key to solve the technical problem provided by the present invention. Furthermore, the above-mentioned embodiments of the apparatus of the present invention do not introduce elements that are less relevant for solving the technical problems of the present invention in order to highlight the innovative part of the present invention, which does not indicate that there are no other elements in the above-mentioned embodiments of the apparatus.

It is to be noted that in the claims and the description of the present patent, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the use of the verb "comprise a" to define an element does not exclude the presence of another, same element in a process, method, article, or apparatus that comprises the element.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.