WO2020015118A1

WO2020015118A1 - Brake device and stroller comprising brake device

Info

Publication number: WO2020015118A1
Application number: PCT/CN2018/105695
Authority: WO
Inventors: 夏孙城; 李自强; 林兆雄
Original assignee: 上海阿柚信息科技有限公司
Priority date: 2018-07-20
Filing date: 2018-09-14
Publication date: 2020-01-23

Abstract

A brake device and a stroller comprising the brake device. The brake device comprises a housing (1), a step motor (2), a rotating shaft (3), a straight moving component (4), and a brake pin (5); the step motor (2) is fixed to the housing (1); the rotating shaft (3) is fixedly connected to an output shaft (6) of the step motor (2); a helical sliding groove (7) is formed along the outer wall of the rotating shaft (3); a sliding block (8) is provided on the straight moving component (4); the sliding block (8) is slidably connected in the sliding groove (7); a slide way (9) is formed on the housing (1); the straight moving component (4) is located in the slide way (9) and can reciprocate along the slide way (9); a through hole for the brake pin (5) to pass through is provided on the housing (1).

Description

Braking device and baby carriage containing the same

Technical field

The present application relates to the technical field of trolleys, and in particular, to a braking device and a baby carriage including the braking device.

Background technique

In addition to baby strollers, strollers are a must-have for parents when traveling with their babies. Due to the particularity of the applicable object of the stroller, infants and young children sitting in the stroller do not have independent mobility. Adults need to brake the stroller's wheels in time when pushing the stroller; after the traditional stroller is adopted, Wheel foot brake method, the user needs to hold the baby stroller to stop the stroller completely. Press the foot brake to confirm that the stroller stops and let go. The baby stroller needs to be supported before the stroller is pushed. The cart can only be moved after the foot brake is lifted with your feet. In the case of stop and go, this way of operation is very tedious.

Due to the particularity of the applicable object of the stroller, infants and young children sitting in the stroller do not have independent mobility. Therefore, when the speed of the stroller is too fast, it may cause safety risks to the infants and children sitting inside, especially When the stroller is in an environment such as a downhill, excessive speed may cause harm to infants and young children, but in the related technology, the stroller is still in the stage of providing a traditional push-pull function, and does not perform functions related to speed measurement.

Aiming at the problems in the related technology, no effective solution has been proposed at present.

Summary of the invention

According to one aspect of the present application, the present application provides a braking device.

The braking device includes a housing, a stepping motor, a rotating shaft, a straight moving part, and a brake pin. The stepping motor is fixed on the housing. The rotating shaft is fixedly connected to the output shaft of the stepping motor. A spiral chute is formed on an outer wall of the rotation shaft, and a slider is provided on the straight-moving member, and the slider is slidably connected to the chute. A slideway is formed on the casing, and the straight-moving movement is formed. The component is located in the slideway and can slide back and forth along the slideway, the brake pin is fixedly connected to one end of the straight-moving component, and the housing is provided with a through hole for the brake pin to pass through.

Optionally, the brake device further includes a brake hole provided in the wheel (10), the brake hole is configured to receive the brake pin passing through the through hole.

Optionally, the execution moving component is a cylindrical sliding member parallel to the axis of the rotation shaft.

Optionally, the shell includes an upper cover and a lower cover which are fastened to each other.

Optionally, the braking device further includes a driving circuit board for driving the stepping motor to rotate.

Optionally, the driving circuit board is electrically connected to a lithium battery.

Optionally, the lithium battery is detachably connected in a battery box. The battery box includes a casing and a receiving cavity located in the casing. The shape of the receiving cavity matches the shape of the lithium battery. One end of the box is provided with an opening communicating with the receiving cavity, one end of the lithium battery is provided with a first connector, and one end of the receiving cavity opposite to the opening is provided to match the first connector. Second connector.

Optionally, the braking device further includes a rotation speed detecting unit. The rotation speed detecting unit includes a magnet module provided on a wheel, and a magnetic induction module provided at a position opposite to the magnet module.

Optionally, the magnet module includes at least one magnet; the at least one magnet is disposed on the wheel away from the axle.

Optionally, the magnetic induction module includes a Hall sensor or a reed switch.

Optionally, the rotation speed detection unit further includes a micro-control unit for determining the rotation speed.

Optionally, the rotation speed detection unit further includes a wireless communication module; the wireless communication module is electrically connected to the micro control unit and the power supply unit, respectively.

Optionally, the power supply unit includes: a power supply battery; and the power supply battery is a lithium battery.

Optionally, the power supply unit further includes: a voltage stabilization module; the power supply unit supplies power to the rotation speed detection unit through the voltage stabilization module.

According to another aspect of the present application, the present application also provides a stroller.

The stroller includes a stroller main body, a front wheel set and a rear wheel set provided at the bottom of the stroller main body, and the rear wheel set includes a braking device provided in the present application.

Optionally, the stroller body includes a rear wheel lever, a rear wheel lever connection is connected to the housing, and the rear wheel lever is connected to the rear wheel lever.

In the braking device provided in the embodiment of the present application, the selection movement of a small stepping motor is converted into a linear movement of a brake pin by a spiral groove on a rotation shaft, thereby realizing a braking function without manual operation.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which form a part of this application, serve to provide further understanding of the application, and make other features, objects, and advantages of the application more apparent. The drawings and descriptions of the schematic embodiments of the present application are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

1 is a schematic diagram of an internal structure of a braking device according to an embodiment of the present application;

2 is a schematic diagram of an external structure of a braking device according to an embodiment of the present application;

3 is a schematic diagram of an internal structure of a battery box according to an embodiment of the present application;

4 is a cross-sectional view of a battery box provided by an embodiment of the present application;

5 is a schematic diagram of a lithium battery and a battery box installation process in the present application;

6 is a schematic structural diagram of a lithium battery and a battery box after installation in the present application;

FIG. 7 is a schematic structural diagram of a baby stroller according to an embodiment of the present application; and

FIG. 8 is a schematic structural diagram of a rotation speed detecting unit in a braking device according to an embodiment of the present application.

detailed description

In order to enable those skilled in the art to better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only Examples are part of this application, but not all examples. Based on the embodiments in this application, all other embodiments obtained by a person of ordinary skill in the art without creative efforts should fall within the protection scope of this application.

It should be noted that the terms “first” and “second” in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way may be interchanged where appropriate, so that the embodiments of the present application described herein. Furthermore, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product, or device that includes a series of steps or units need not be limited to those explicitly listed Those steps or units may instead include other steps or units not explicitly listed or inherent to these processes, methods, products or equipment.

In the present application, the orientations or positional relationships indicated by the terms "upper", "lower", "inner", "middle", "outer", "front", "rear" are based on the orientations or positions shown in the drawings relationship. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit that the indicated device, element or component must have a specific orientation, or be constructed and operated in a specific orientation.

In addition, some of the terms mentioned above may be used to indicate other positions or positions, in addition to other meanings. For example, the term "up" may be used to indicate some kind of dependency or connection in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific situations.

In addition, the terms "setup", "connected", "provided", "fixed", and "encapsulated" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or a monolithic structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or two devices, components, or Internal communication between components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The application will be described in detail below with reference to the drawings and embodiments.

Referring to FIGS. 1-6, the present application provides a braking device. The brake and braking device for a baby stroller provided in the present application is used to solve the technical problem of tedious operation caused by manual braking of a baby stroller in the related art.

As shown in FIG. 1 and FIG. 2, the braking device includes a housing 1, a stepping motor 2, a rotating shaft 3, a straight moving part 4, and a brake pin 5. The stepping motor 2 is fixed on the housing 1, and the rotating shaft 3 and step The output shaft 6 of the input motor 2 is fixedly connected, and a spiral chute 7 is formed along the outer wall of the rotation shaft 3. A slider 8 is provided on the straight-moving member 4, the slider 8 is slidably connected to the chute 7, and the casing 1 is formed. There is a slideway 9, the straight moving part 4 is located in the slideway 9 and can slide back and forth along the slideway 9, the brake pin 5 is fixedly connected to one end of the straight moving part 4, and the housing 1 is provided with a through hole through which the brake pin 5 passes. . In cooperation with the brake pin, a brake hole is provided in the wheel 10.

In the specific work process, the stepper motor 2 controls the brake pin 5 to extend through the through hole, the brake pin 5 is inserted into the brake hole, and the wheel 10 is switched from the motion state to the brake state; the stepper motor 2 controls the brake pin 5 to retract the casing 1 Inside, the brake pin 5 is separated from the brake hole, and the wheel 10 is switched from a braking state to a moving state.

A stepping motor 2 is provided inside the braking device, a retractable braking pin 5 is provided on the straight-moving part 4, and a braking hole matching the braking pin 5 is provided on the wheel 10, thereby achieving the stepping motor pairing. For the purpose of controlling the telescopic state of the brake pin 5, when the brake pin 5 is extended, the brake pin 5 is inserted into the brake hole, and the wheel is switched from the free state to the brake state; when the brake pin 5 is retracted, the brake pin 5 is separated from the brake hole. , The wheel is switched from the braking state to the free state, thereby achieving the braking function, and the control of the stepper motor is relatively easy. Therefore, in the related art, the technical problem of tedious operation caused by the manual braking of the baby carriage by the foot brake is solved.

In some embodiments, as shown in FIG. 1, the execution moving part 4 is a columnar slider parallel to the axis of the rotation shaft 3, preferably a cylindrical slider.

In some embodiments, in order to achieve quick and convenient installation and removal, as shown in FIG. 2, the casing 1 includes an upper cover 101 and a lower cover 102 that are fastened to each other.

It should be noted that the brake device provided in the embodiment of the present application includes a stepping motor internally. According to different wheel structure sizes, the type of the stepping motor 2 in this embodiment can be selected in the prior art. Models are 24BYJ48, 28BYJ48, 24BYJ28, and 28BYJ28.

In order to facilitate the control of the stepping motor and reduce errors in wiring and assembly, in some embodiments, the braking device further includes a driving circuit board 18 for driving the stepping motor 2 to rotate. The driving circuit board 18 is electrically connected to the lithium battery 11. The lithium battery 11 provides power for the operation of the stepper motor 2.

In order to solve the inconvenience of connecting the lithium battery, it is prone to failure due to long-term use, causing the problem of unstable connection. In some embodiments, as shown in FIG. 3-6, the lithium battery 11 is detachably connected in the battery box 12, The battery box 12 includes a housing 1201 and a receiving cavity 1202 located in the housing 1201. The shape of the receiving cavity 1202 matches the shape of the lithium battery 11. One end of the battery box 12 is provided with an opening 1203 communicating with the receiving cavity 1202. The lithium battery A first connector 1101 is provided at one end of 11 and a second connector 1204 matching the first connector 1101 is provided at the end opposite to the opening 1203 in the receiving cavity 1202.

By forming a fixed accommodating cavity in the battery box 12, a second connector 1203 connected to a circuit board or an electrical component is disposed in the accommodating cavity. When the lithium battery 11 is inserted, the first connector 1101 and the second connector 1203 located on the lithium battery 11 are automatically docked together to form an electrical connection due to the limiting guidance of the receiving cavity.

One end of the lithium battery 11 provided with the first connector 1101 is provided with a first step 1102, and one end of the accommodating cavity provided with the second connector 1203 is provided with a second step 1204 matching the first step 1102. The first step 1102 and the second step 1204 that cooperate with each other can prevent the battery body 11 from being inserted backward. A cover 1205 for opening or closing the opening 1202 is provided at the opening 1202. One end of the cover 1205 is rotatably connected to the casing 1201. It is preferably hinged to make the connection more convenient. Preferably, one end of the cover 1205 is hinged with the housing 1201, and the other end forms a bent portion 1206. The bent portion 1206 and the cover 1205 form an L-shaped structure, and the cover 1205 fits the side of the housing 1201 in a state where the opening 1202 is closed. wall. A Y-shaped bifurcation structure 1207 is formed at the end of the bent portion 1206. A groove 1208 is formed on the side wall of the housing 1201. In a state where the cover 1205 closes the opening 1202, one end of the bifurcation structure 1207 is matched with and snapped on. In the groove 1208, the other end of the bifurcation structure 1207 can be used to provide a throbbing force to facilitate the removal of the bifurcation structure from the groove and open the cover 1205. In the state that the lid 1205 is closed with the opening 1202, the bent portion depends on the elasticity of the material itself, and can be closely attached to the side wall of the housing. One end of the bifurcated structure is snapped into the groove 1208 to achieve a fixed connection. The bifurcation structure needs to be moved manually to overcome the elasticity of the material itself.

As shown in FIG. 4, a driving circuit board 18 for driving the stepping motor 2 to rotate is disposed on the housing 1201, and the second connector 1203 is connected to the driving circuit board 18.

In some embodiments, the braking device further includes a rotation speed detection unit. The rotation speed detection unit includes a magnet module 11 disposed on the wheel and a magnetic induction module 112 disposed at a position opposite to the magnet module, such as Figure 8 shows.

Optionally, the magnet module 11 is provided on the brake seat 152 of the wheel 15; because the brake seat 152 is closer to the fixed seat 16, it can generate a larger magnetic force, so that the magnetic force induction module 112 can receive To the maximum magnetic force generated by the magnet module 111, so that it can have a better induction effect, and it is easier to embed the magnet module 111 inside the brake seat 152 relative to other positions in the wheel 15. Preferably, when the magnetic induction module 112 and the magnet module 111 face each other, the state of the magnetic induction module 112 is a closed state, and further, by detecting the number of closing times per unit time, and combining the circumference of the wheel 15 Long, and then the calculation speed of the stroller can be determined by the calculation of the micro control unit.

In some embodiments, the magnet module 111 includes at least one magnet; the at least one magnet is disposed at a position of the wheel 15 away from the fixed shaft 151. Generally, the fixed shaft 151 is a component that the wheel 15 is fixedly connected to the fixed seat 16, and it is easy to know that the fixed shaft 151 is generally located on the center of the circle of the wheel. Multiple magnets may be provided, and the multiple magnets and the fixed shaft may be located on the same straight line or have other relative relative positions. Therefore, when the wheel 115 rotates once, the magnetic induction module 112 can detect twice or more. Many times, at the same time, the speed of the wheel can be calculated by calculating the time difference between the two closings. The speed of this measurement is more real-time and can effectively guarantee accuracy.

In some embodiments, the magnetic induction module 112 is a Hall sensor or a reed switch. The Hall sensor uses a sensor of model A1120; the reed switch uses a reed switch of model MKA14103. Since photoelectric sensors and infrared sensors are prone to misoperation, the use of Hall sensors and reed switches can effectively reduce the probability of misoperation. The operating mechanism of Hall sensors and reed switches is the same, which is triggered by the proximity of magnets. The power consumption is very low, so it has a large practical use. The photoelectric sensor and the infrared consume a large amount of power, and the actual effect is not good. The Hall sensor uses a sensor of model A1120; the reed switch uses a reed switch of model MKA14103. Both sensors have good accuracy and are relatively inexpensive, more suitable for large-scale manufacturing and use, and easy to market.

In some embodiments, the rotation speed detecting unit further includes: a wireless communication module; the wireless communication module is electrically connected to the micro control unit and the power supply unit respectively; the wireless communication module uses a Bluetooth chip, and the Bluetooth chip uses a Bluetooth chip of model CC2541. The use of a wireless communication module can enable the data information measured by the braking device to be sent to smart mobile devices such as mobile phones through the wireless communication module, and in a way that is easily implemented by those skilled in the art, the APP of the smart mobile device Display the speed and mileage in real time; and record the user's mileage data to the background server through the APP, which mainly contains mileage data and speed data, and the background will calculate the calorie burned according to the user's weight entered by the APP, and then the APP reads the calories Consume and display on the user interface. The Bluetooth chip is used to ensure the stability of data transmission and reduce energy consumption while ensuring wireless communication. Finally, the Bluetooth chip is preferably connected to the micro control unit through the URAT interface. The model is CC2541. The Bluetooth chip can get better Bluetooth communication quality, and the chip is relatively inexpensive, more suitable for large-scale manufacturing and use, and easy to market.

In some embodiments, the power supply unit includes: a power supply battery; and the power supply battery is a lithium battery. The use of lithium battery settings has the following advantages: relatively high energy. It has high storage energy density, which has reached 460-600Wh / kg, which is about 6-7 times that of lead-acid batteries; long service life; light weight, about 1 / 6-1 / 5 of the weight of lead-acid products under the same volume; High and low temperature adaptability, can be used in the environment of -20 ℃ --60 ℃.

In some embodiments, the power supply unit further includes: a voltage stabilization module; the voltage stabilization module is electrically connected to the power supply unit, and the power supply unit supplies power to the rotational speed detection unit through the voltage stabilization module. The setting of the voltage stabilization module can effectively ensure the voltage stability of each functional circuit or component in the device, ensure the safe and stable operation of the system, and effectively improve the service life of the speed detection unit.

In some embodiments, the micro-control unit adopts a micro-control chip with a model number of stm32F103; the voltage-stabilizing module uses a voltage-control chip with a model number of HT7333. The micro-control unit uses a micro-control chip of type stm32F103. Since this type of chip has good computing performance and low power consumption, it is suitable for the use of braking devices; the voltage-stabilizing module uses a voltage-stabilizing chip of type HT7333. The voltage stabilizing function can effectively ensure the voltage stability of each functional circuit or component in the system; and the HT7333 voltage stabilizing chip and stm32F103 microcontroller chip are relatively cheap, more suitable for large-scale manufacturing and use, and easy to market.

Another embodiment of the present application provides a stroller including a braking device.

As shown in FIG. 7, the baby carriage provided in this embodiment includes a baby carriage main body 13, a front wheel set 14 and a rear wheel set 15 provided at the bottom of the baby stroller main body 13, and the rear wheel set 15 includes the braking device provided in Embodiment 1. .

As shown in FIG. 7, the stroller main body 13 includes a rear wheel lever 16 and a front wheel lever 19. The rear wheel lever and the front wheel lever are cross-connected, and two of them are respectively provided on the two sides of the stroller. The rear wheel lever The lower end of the rear wheel is connected to the rear wheel group, the lower end of the front wheel rod is connected to the front wheel group, the housing 1 is connected to the rear wheel rod connector 17, and the rear wheel rod connector 17 is connected to the rear wheel rod 16. The two rear wheel lever connectors on the left and right two rear wheel sets are connected by a cross bar 20.

It should be noted that this application only lists the necessary structures of the braking device and the stroller to realize the braking function, but the actual structure of the braking device and the stroller in this application is not limited to this, such as the control step The specific circuit structure, control method, and specific structure of the stroller main body of the motor can also be selected and set in the existing technology according to the actual situation. Those skilled in the art can choose according to actual needs and the existing technology. More details.

The above are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, this application may have various modifications and changes. Any modification, equivalent replacement, or improvement made within the spirit and principle of this application shall be included in the protection scope of this application.

Claims

A braking device includes a housing (1), a stepping motor (2), a rotating shaft (3), a straight moving part (4), and a brake pin (5), and the stepping motor (2) is fixed to the On the casing (1), the rotating shaft (3) is fixedly connected to the output shaft (6) of the stepping motor (2), and a spiral chute (7) is formed along the outer wall of the rotating shaft (3). A slider (8) is provided on the straight moving part (4), the slider (8) is slidably connected to the slide groove (7), and a slide track (9) is formed on the casing (1). ), The straight moving member (4) is located in the slideway (9) and can slide back and forth along the slideway (9), the brake pin (5) and one end of the straight moving member (4) For fixed connection, a through hole is provided on the casing (1) for the brake pin (5) to pass through.
The brake device according to claim 1, further comprising a brake hole provided in the wheel (10), the brake hole configured to receive the brake pin passing through the through hole.
The braking device according to claim 1, wherein the execution moving member (4) is a cylindrical slider parallel to an axis of the rotation shaft (3).
The braking device according to claim 1, wherein the housing (1) comprises an upper cover (101) and a lower cover (102) which are engaged with each other.
The braking device according to claim 1, further comprising a driving circuit board (18) for driving the stepping motor (2).
The braking device according to claim 5, wherein the driving circuit board (18) is electrically connected to the lithium battery (11).
The braking device according to claim 6, wherein the lithium battery (11) is detachably connected in a battery box (12), the battery box (12) comprising a housing (1201) and a housing (1201) ), A receiving cavity (1202) inside, the shape of the receiving cavity (1202) matches the shape of the lithium battery (11), and one end of the battery box (12) is provided with the receiving cavity (1202) A communicating opening (1203), one end of the lithium battery (11) is provided with a first connector (1101), and the end of the receiving cavity (1202) opposite to the opening (1203) is provided with the first connector One connector (1101) matches the second connector (1204).
The braking device according to claim 2, further comprising a rotation speed detecting unit, the rotation speed detecting unit comprising: a magnet module provided on a wheel; and a magnetic force induction module provided at a position opposite to the magnet module.
The braking device according to claim 8, wherein the magnet module includes at least one magnet; the at least one magnet is disposed on the wheel away from the axle.
The braking device according to claim 8, wherein the magnetic induction module comprises a Hall sensor or a reed switch.
The braking device according to claim 8, wherein the rotation speed detecting unit further comprises a micro-control unit for determining a rotation speed.
The braking device according to claim 11, wherein the rotation speed detecting unit further comprises a wireless communication module; the wireless communication module is electrically connected to the micro control unit and the power supply unit, respectively.
The braking device according to claim 12, wherein the power supply unit comprises: a power supply battery; and the power supply battery is a lithium battery.
The braking device according to claim 13, wherein the power supply unit further comprises: a voltage stabilization module; and the power supply unit supplies power to the rotation speed detection unit through the voltage stabilization module.
A stroller, comprising a stroller body, a front wheel set and a rear wheel set provided at the bottom of the stroller body, the rear wheel set comprising the braking device according to claim 1.
The stroller according to claim 15, wherein the stroller body includes a rear wheel rod, a rear wheel rod connector is connected to the housing, and the rear wheel rod connector is connected to the rear wheel rod.