CN112519866B - Baby carriage - Google Patents
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- CN112519866B CN112519866B CN201910877537.9A CN201910877537A CN112519866B CN 112519866 B CN112519866 B CN 112519866B CN 201910877537 A CN201910877537 A CN 201910877537A CN 112519866 B CN112519866 B CN 112519866B
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- stroller
- braking
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B9/00—Accessories or details specially adapted for children's carriages or perambulators
- B62B9/08—Braking mechanisms; Locking devices against movement
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- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
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- Carriages For Children, Sleds, And Other Hand-Operated Vehicles (AREA)
Abstract
The invention discloses a baby stroller. The baby stroller comprises a stroller body main body, a front wheel, a rear wheel and a handle, and further comprises a sensor and a brake control device, wherein the brake control device executes a brake control method, and the baby stroller comprises the following steps: an intelligent brake starting step, namely starting an intelligent brake mode by long-pressing an intelligent brake mode switching 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 baby stroller provided by the invention is simple and reasonable in design, and can eliminate potential safety hazards of the baby stroller.
Description
Technical Field
The present invention relates to a baby stroller.
Background
The baby stroller is a necessary product when parents take a baby to go out. The traditional baby stroller adopts a rear 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 the baby stroller can move.
In order to solve the technical problem, the 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 frame, a seat fixed in the frame, a front wheel and a rear wheel which are arranged at the lower end of the frame and a handle arranged on the frame, wherein the rear wheel is internally provided with a brake device, and the brake device comprises a brake component for controlling the rotation or stop of the rear wheel and a brake steel wire for driving the brake component 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 with the lower handle to pull the brake steel wire to generate displacement, the brake assembly is driven to be separated from the rear wheel, and the rear wheel can rotate; after the upper handle is loosened, the upper handle automatically resets to drive the brake assembly to clamp the rear wheel, so that the rear 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, whether the defects in the prior art are overcome or not, the improved baby stroller is 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 staff in the field is urgently solved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the baby stroller which is simple and reasonable in design and can eliminate the potential safety hazard of the baby stroller. The baby stroller provided by the invention is simple and reasonable in design, and 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 flat ground and slides on slope can be solved, so that the safety performance of babies is higher.
In order to achieve the purpose, the invention provides the following technical scheme: a baby stroller comprises a stroller body, front wheels, rear wheels and a handle, and is characterized in that,
also comprises a sensor and a brake control device, a vehicle front LED lamp is arranged at the front side of the vehicle body main body, an intelligent brake mode switching button is arranged on the handle,
the brake control device executes a brake control method, and the brake control method comprises the following steps:
an intelligent brake starting step, namely starting an intelligent brake mode by long-pressing an intelligent brake mode switching 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 baby stroller provided by the invention is simple and reasonable in design, can eliminate potential safety hazards of the baby stroller, and has great economic benefits and safety benefits.
Drawings
Fig. 1 is a schematic view of a brake control method of a stroller in accordance with a first embodiment of the present invention.
Fig. 2 is a schematic view of the button portion of the handle of the stroller of the first embodiment of the present invention.
Fig. 3 is an overall schematic view of the stroller according to the first embodiment of the present invention.
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 view of a braking distance calculation step at the time of a slope in the braking control method in fig. 1.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the 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 brake 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 the handle 16 of the stroller of the first embodiment of the present invention. Fig. 3 is an overall schematic view of the stroller according to the first embodiment of the present invention. As shown in fig. 1, the brake 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.
As shown in fig. 3, the stroller includes a body 13, front wheels 15, rear wheels 14, a handle 16, a sensor and a brake control device, which are not shown, and a front LED lamp 19 is provided on the front side of the body 13. As shown in fig. 2, two buttons are provided on the handle 16, wherein the left button is an intelligent brake mode switching button, and the right button is a vehicle 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 front LED lamp 19 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 16, which strip extends in a horizontal direction as shown in fig. 2, occupies almost the entire handle 16 and encloses the two buttons inside. In the intelligent braking starting step, the intelligent braking mode is started by long-pressing the left button. Specifically, holding down the left button leaves it until the light on the button is blue, thereby initiating the smart braking mode. In the present embodiment, the brake control device and the front LED lamp are supplied with power by the rechargeable battery, and the sensor and the handle LED strip are supplied with power by the No. 7 battery, but the present embodiment is not limited to this power supply method, and various other power supply methods can be applied to the present embodiment. In this embodiment, the warning light on the smart brake mode switching button is turned on red when the rechargeable battery is low, the warning light on the LED light switching button in front of the vehicle is turned on red when the battery No. 7 is low, and the warning light on the smart brake mode switching button is turned on blue when the smart brake mode is activated. In the present embodiment, the handle 16 is provided with a vehicle front LED lamp switching button, but the present invention is not limited thereto, and the button may not be provided.
The sensor of the stroller shown in fig. 3 will illuminate the handle 16 when touched. At this point, the handle LED light strip will light up blue, and go out after a few seconds. In the touch detection step, the sensor detects whether the handle 16 is touched. If it is detected that the handle 16 is not touched, a road condition determination step is performed.
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 the measurements are comparedFiltering processing is performed 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 =1, and the angular change calculated by the acceleration value and the angular velocity value is weighted and averaged by a calculation formula Δ a = Wacc × Δ Aacc + Wgyro × Δ agro to obtain an angular change value Δ a. Finally, according to the last angle value A n-1 Obtaining 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 n Equal to the angle theta of the stroller to the ground. With such a calculation method based on 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 braking the stroller when the road condition is a slope. 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 when the ground is leveled in the braking control method of fig. 1. Fig. 9 is another schematic view of a braking distance calculating step when the ground is leveled 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 lock pin moving distance L2 of the rear wheel 14 is calculated, the arc length distance L3 of the rear wheel 14 is calculated, and the handle sensing distance L1, the brake lock pin moving distance L2, and the arc length distance L3 are added to be the first brake 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 rear wheel 14 by the moving speed v of the stroller. As shown in fig. 8 and 9, the arc length distance L3 is an arc length distance over which the rear wheel 14 rolls after the sensor detects that the level of the induction magnet 12 provided on the rear wheel 14 has changed three times. The principle of calculating the 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 rear wheel is divided into 6 sectors in the figure, three induction magnets 12 are uniformly distributed on the rear wheel 14 at approximately 120 ° intervals, and the sensor moves around the center of the rear wheel, there are processes of approaching and then separating for each induction magnet, so that there are 2 level changes while passing each induction magnet, and the sensor makes a turn around the rear wheel, and there are 6 level changes in total. When the rear 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 identifies 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 rear wheel 14. For example, when the wheel diameter D is 150mm and the wheel circumference C is 471.24mm, the value of L3 ranges from 157.08mm to 235.62mm, as can be seen from the above calculation. The moving speed v of the baby stroller is generally 4.0-5.0km/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, the first braking distance L = L1+ L2+ L3, and thus the value of the first braking distance L ranges from 454.08mm to 532.62mm.
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, if the angle between the stroller and the ground is θ, the acceleration a = gsin θ of the stroller, the moving time t = t1+ t2 of the stroller, and the braking distance L' =1/2at neglecting the friction force 2 . For example, when the moving time t is 0.32s and the angle θ is 12 °, the braking distance L' is about 104mm as can be seen from the above calculation.
In the braking step, braking is performed after the stroller has advanced 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 flat ground is, for example, preferably 450 to 550mm, and more preferably 500mm. The braking distance L' in the case of a slope is, for example, preferably 75 to 145mm, and more preferably 80mm.
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 stroller of the first embodiment, the brake is automatically applied as long as the stroller advances a certain distance in the case that the hand is separated from the handle of the stroller, thereby ensuring that the stroller does not run too long to cause danger to the baby.
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 noted that in the claims and the description of the 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.
Claims (9)
1. A baby stroller comprises a stroller body, front wheels, rear wheels and a handle, and is characterized in that,
also comprises a sensor and a brake control device, a vehicle front LED lamp is arranged at the front side of the vehicle body main body, an intelligent brake mode switching button is arranged on the handle,
the brake control device executes a brake control method, and the brake control method comprises the following steps:
an intelligent brake starting step, namely starting an intelligent brake mode by long-pressing an intelligent brake mode switching button;
a touch detection step, wherein a sensor detects whether the handle is touched;
a road condition judging step, namely judging the road condition under the condition that the sensor detects that the handle is not touched;
a braking distance calculating step, wherein the corresponding braking distance is calculated 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;
a prompting step, namely prompting the braked vehicle by audio after braking;
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 rear wheel;
calculating the rolling arc length distance of the rear 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.
2. The stroller of claim 1,
in the step of judging the road condition, calculating the angle between the baby stroller and the ground based on the triaxial acceleration measurement value and the triaxial angular velocity measurement value, judging that the road condition is flat when the sensor detects that the angle between the baby stroller and the ground is smaller than a specified angle, and judging that the road condition is a slope when the sensor detects that the angle between the baby stroller and the ground is larger than or equal to the specified angle.
3. The stroller of 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.
4. The stroller of claim 1,
the handle sensing distance is the distance obtained by multiplying the handle sensing response time by the moving speed of the baby stroller.
5. Baby stroller according to claim 1,
the moving distance of the brake lock needle is obtained by multiplying the moving time of the brake lock needle arranged on the rear wheel by the moving speed of the baby stroller.
6. The stroller of claim 1,
the arc length distance is the arc length distance of the rear wheel rolling after the sensor detects that the level of the induction magnet arranged on the rear wheel changes three times.
7. The stroller of claim 1,
a front LED lamp switching button and a handle LED lamp belt are also arranged on the handle,
the vehicle front LED lamp switching button is used for controlling the on/off of the vehicle front LED lamp.
8. The stroller of claim 7,
also comprises a rechargeable battery and a No. 7 battery,
the brake control device and the vehicle front LED lamp are powered through the rechargeable battery, and the sensor and the handle LED lamp strip are powered through the No. 7 battery.
9. The stroller of claim 8,
when the electric quantity of the rechargeable battery is insufficient, the prompting lamp on the intelligent brake mode switching button is turned on to be red,
when the No. 7 battery is low in electric quantity, the prompting lamp on the LED lamp switching button is turned on to be red,
when the intelligent braking mode is started, the prompt lamp on the intelligent braking mode switching button is turned on and is blue.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910877537.9A CN112519866B (en) | 2019-09-17 | 2019-09-17 | Baby carriage |
| TW109130904A TWI739590B (en) | 2019-09-17 | 2020-09-09 | Cart and control method thereof |
| KR1020227012603A KR20220061237A (en) | 2019-09-17 | 2020-09-10 | Cart and its control method |
| JP2022517309A JP7287619B2 (en) | 2019-09-17 | 2020-09-10 | Cart and its control method |
| PCT/CN2020/114467 WO2021052238A1 (en) | 2019-09-17 | 2020-09-10 | Pushchair and control method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910877537.9A CN112519866B (en) | 2019-09-17 | 2019-09-17 | Baby carriage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112519866A CN112519866A (en) | 2021-03-19 |
| CN112519866B true CN112519866B (en) | 2022-12-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910877537.9A Active CN112519866B (en) | 2019-09-17 | 2019-09-17 | Baby carriage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112519866B (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2003902787A0 (en) * | 2003-06-04 | 2003-06-19 | John Keith Marlow | Improvements to hand propelled vehicles |
| JP2015047298A (en) * | 2013-08-30 | 2015-03-16 | 船井電機株式会社 | Walking assist moving body |
| CN104442977B (en) * | 2013-09-17 | 2017-01-25 | 鸿富锦精密工业（深圳）有限公司 | Intelligent trolley |
| CN103818422A (en) * | 2014-03-12 | 2014-05-28 | 江南大学 | Touch induction type baby carriage intelligent braking device |
| CN203805967U (en) * | 2014-04-19 | 2014-09-03 | 东莞硕仕儿童用品有限公司 | Baby buggy |
| CN104401381B (en) * | 2014-11-14 | 2017-04-05 | 好孩子儿童用品有限公司 | A kind of electric brake mechanism and perambulator |
| CN109278841A (en) * | 2018-09-29 | 2019-01-29 | 上海阿柚信息科技有限公司 | Method of controlling security and safety control system for perambulator |
| CN209274676U (en) * | 2018-11-16 | 2019-08-20 | 深圳和而泰数据资源与云技术有限公司 | A kind of stroller |
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2019
- 2019-09-17 CN CN201910877537.9A patent/CN112519866B/en active Active
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| CN112519866A (en) | 2021-03-19 |
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