TWI817453B - Trolley automatic braking device - Google Patents

Abstract

The "automatic braking device for trolleys" of the present invention is mainly installed on the wheel body of the trolley; it at least includes a deflectable motor, the motor shaft is connected to a ratchet, and at least one ratchet plate is provided on the side of the ratchet. The output shaft and the wheel body are in a linked relationship; and the motor is electrically connected to the induction switch unit at the handle of the trolley. When the sensor switch unit is held by the user, the inside of the motor can idle freely and the wheel body can be rotated. On the contrary, when the user leaves the trolley with both hands without holding the handle, the inside of the motor will become unable to idle. The ratchet wheel and ratchet plate can make the wheel body automatically produce braking effect. Using this case, the automatic braking function can be produced without the need for electricity, which greatly improves the convenience and safety of use.

Description

Trolley automatic braking device

The "automatic braking device for a trolley" of the present invention relates to an automatic braking device for a trolley without power, and particularly refers to a technical field that automatically stops the trolley and prevents it from moving when the user is not holding the trolley.

Strollers are commonly used in daily life, such as strollers for carrying items or baby strollers for infants to ride on. Among them, in order to ensure the safety of infants and children, baby strollers will at least be equipped with a manual parking brake to facilitate parents to take away or place the infant. However, when many parents are pushing a stroller, they will inevitably take their hands off the stroller for a short period of time, such as paying for shopping, taking out backpack items, etc. At this time, if they happen to be on a slope with a baby on board, The stroller will slide on its own. If the parents happen to not notice it, it is likely to cause accidents and other casualties.

Although some manufacturers have developed automatic braking strollers, they are equipped with an electronic sensor switch on the handle. When parents take their hands off the stroller, an electronic control module will be used to brake the tires to avoid danger. Although this structure can achieve the safety function of automatic braking, it requires the use of electricity, which is The battery needs to be charged or replaced before going out, which is quite troublesome and inconvenient. Furthermore, if the battery is exhausted after going out, the automatic braking device will temporarily fail, which is dangerous, especially if a parent mistakenly thinks the stroller is a stroller. It will automatically stop if you lose your guard and let go, which only increases the risk. In addition, this type of trolley adds batteries, electronic controls and other devices, which greatly increases the overall weight, cost and selling price, resulting in poor sales of this type of product on the market. .

Obviously, the conventional automatic braking structure of the trolley is still not ideal and perfect, and there is a need for improvement.

In view of this, the inventor specially researched and created this case, hoping that through the proposal of this case, the shortcomings of the existing structure can be improved, and the automatic braking function of the trolley can be more perfect and ideal to meet actual needs.

In order to improve the above-mentioned conventional trolleys that do not have automatic braking function, or the electric automatic braking structure requires the use of electricity, causing trouble in charging, failure when the power is exhausted, and increased weight, etc., the main purpose of the present invention is to provide a "Trolley" "Automatic braking device", which does not require the use of electricity, uses an induction switch unit installed on the handle of the trolley, and the induction switch unit is electrically connected to the motor of the automatic braking device, which is a permanent magnet motor structure; When the parent holds the sensor switch unit, the electrical circuit between the sensor switch unit and the motor is in a disconnected state, the motor can rotate internally, the trolley wheel body linked to the motor output shaft can rotate, and the trolley can move freely. On the contrary, when the parent does not hold the induction switch unit, the electrical circuit between the induction switch unit and the motor is closed, forming a load effect, and the motor is unable to idle, and the output shaft of the motor can match the structure of the device. A braking function is provided on the trolley wheel body, so that the trolley cannot move arbitrarily, so as to achieve the automatic braking function without electricity, thereby achieving the purpose of improving safety.

The secondary purpose of the present invention is to provide an "automatic braking device for trolleys". Since it does not require the use of electricity, parents do not have to worry about charging or replacing batteries, and it is very convenient to use.

Another secondary purpose of the present invention is to provide an "automatic braking device for trolleys". Since it does not require the use of electricity or the need to carry batteries, the weight of the trolley is still about the same as that of the conventional ones, and it is easy to carry and pick up; the cost and sales are The price will not increase significantly, making the product competitive.

In order to achieve the above purpose, the specific means in this case are: the "automatic braking device of the trolley", the main structure is installed on the wheel body of the trolley, and a sensor switch unit is installed on the handle of the trolley.

In one of the preferred embodiments, this case includes a motor, which is fixed on a bearing. The motor is a permanent magnet motor structure. The motor includes an output shaft. The motor is connected with two wires. When the two wires When the wire circuit is broken, the interior of the motor will be able to link its output shaft to rotate freely; the output shaft passes through the center of a ratchet and the center of a gear successively, and there is a linkage relationship between the three; a ratchet plate is provided on either or both outer sides of the ratchet, and the output shaft passes through the center of a ratchet and the center of a gear. ratchet plate and ratchet wheel Located on the same plane, the inner edge of the ratchet plate is provided with an outer ratchet, and the ratchet ring is provided with a ratchet. The outer ratchet and the ratchet can be used for mating; the ratchet plate is connected to the structure of the trolley and is fixed. status.

In a preferred embodiment, the bearing seat includes a bearing plate, and the motor is fixed on the bearing plate; a bushing is provided at the bottom of the bearing seat, and the bushing is penetrated by a wheel axle of the trolley; the bearing There is a convex portion corresponding to both sides of the seat, which provides one end of an elastic element to be assembled and positioned; and the opposite end of the elastic element is assembled with a positioning element. The positioning element is connected to the structure of the trolley and is in the shape of a positioning element. Fixed state.

In one of the preferred embodiments, this case at least further includes a wheel body, a ring-shaped internal gear is provided on the inner edge of the wheel body, and the internal gear is coupled with the gear, so that the internal gear, the gear and the output shaft are in a linked relationship. In addition, a wheel sleeve is provided in the center of the wheel body, which can be installed through the connecting body.

In a preferred embodiment, the two wires of the motor are connected to the induction switch unit at the handle of the trolley.

In a preferred embodiment, the sensor switch unit at least includes a push-type structure or a bending structure, both of which are used to sense whether the parent's hands are placed on the handle of the stroller.

1: Motor

10: Wire

11:Output shaft

12: Ratchet

121:ratchet

13:Gear

2:Bearing

21: Shaft sleeve

22:Bearing plate

23:convex part

24: Elastic element

25: Positioning components

3: Spiny plate

31:Outer ratchet

4: Wheel body

41: Internal gear

42: Connector

43:axle sleeve

5: Induction switch unit

91:Grip

92:axle

The first figure is a schematic diagram of the three-dimensional structure of the present invention; The second figure is an exploded view of the three-dimensional structure of the present invention; the third figure is a schematic side view of the structure of the present invention; the fourth figure is a diagram of the use state of the present invention when it is not stopped; the fifth figure is: The sixth figure is a diagram of another usage state of the present invention when it is not braked; the sixth figure is a diagram of another usage state of the present invention when it is braked; the seventh figure is a diagram of another usage state of the present invention when it is braked; the eighth figure is a diagram of another usage state of the present invention when it is braked; Figure: It is another usage state diagram when the present invention is braking; Figure 9: It is a usage status diagram when the brake is released after the present invention is stopped.

Hereby, we would like to give a detailed description of the structure and composition of the "automatic braking device for trolleys" of the present invention, as well as the functions it can produce, with reference to the drawings, and a preferred embodiment of the case will be described in detail below.

First of all, please refer to the first, second and third pictures. The "automatic braking device of the trolley" in this case has the main structure installed at 4 places on the wheel body of the trolley, and a sensor is installed at 91 places on the trolley handle. Switch unit 5.

This case includes a motor 1, which is fixed on a bearing 2. The motor 1 is a permanent magnet motor structure. The motor 1 includes an output shaft 11. The motor 1 is connected with two wires 10. When the two wires 10 are connected in a loop, When the circuit is broken, the interior of the motor 1 will be able to freely rotate its output shaft 11; the output shaft 11 passes through the center of a ratchet 12 and the center of a gear 13 successively, and the three are in a linked relationship; one or both outer sides of the ratchet 12 are provided with a The ratchet plate 3 is located on the same plane as the ratchet wheel 12. The inner edge of the ratchet plate 3 is provided with external ratchet teeth 31, and the ratchet wheel 12 has a ring. A ratchet 121 is provided, and the outer ratchet 31 and the ratchet 121 can be used for coupling; the ratchet plate 3 is connected to the structure of the trolley and is fixed.

The bearing 2 includes a bearing plate 22, and the motor 1 is fixed on the bearing plate 22; a bushing 21 is provided at the bottom of the bearing 2, and the bushing 21 is penetrated by a wheel axle 92 of the trolley; the bearing 2 There is a protrusion 23 correspondingly provided on both sides. The protrusion 23 provides one end of an elastic element 24 for positioning. The other end of the elastic element 24 has a positioning element 25. The positioning element 25 is connected to the trolley. The structure is connected and fixed.

The wheel body 4 has a ring-shaped internal gear 41 on its inner edge, and the internal gear 41 is coupled with the gear 13, so that the internal gear 41, the gear 13 and the output shaft 11 are in a linked relationship; and the wheel body 4 is provided with a wheel sleeve 43 in the center, which can be installed through a connecting body 42.

The two wires 10 of the motor 1 are connected to the induction switch unit 5 at the handle 91 of the trolley. The induction switch unit 5 at least includes a push-type structure or a bending type structure, and its function is to sense. Whether parents place their hands on the trolley handle 91 or not.

As shown in the third figure, the bearing 2 in this case has elastic elements 24 correspondingly arranged on both sides, so under normal conditions the bearing 2 will be located in the middle of the two ratchet plates 3, and the ratchet wheel 12 will not touch the ratchet plates 3.

When implementing this project, please refer to the fourth figure. When the user's hand presses the sensor switch unit 5 at 91 of the trolley handle, the circuit between the sensor switch unit 5, the two wires 10 and the motor 1 can be broken. Inside motor 1 to rotate freely; when the wheel body 4 of the trolley is pushed, the bearing 2 is still located in the middle of the two ratchet plates 3, and the ratchet wheel 12 will not touch the ratchet plates 3 (please cooperate with the fifth picture), and the rotating wheel body 4 The interlocking internal gear 41 rotates relative to the gear 13, the ratchet wheel 12 and the output shaft 11. At this time, there will be no braking effect, and the trolley can be freely pushed.

Please refer to Figure 6 again. When the user's hand leaves the sensor switch unit 5 at the handle 91 of the trolley, the electrical circuit between the sensor switch unit 5, the two wires 10 and the motor 1 will be closed, causing a load effect. When the wheel 4 of the trolley is pushed, the rotating wheel 4 will link the internal gear 41 to rotate relative to the gear 13 and the output shaft 11, but the motor 1 cannot rotate freely. It rotates freely, forcing the motor 1 to produce a force to the side relative to the base 2 (please cooperate with the seventh and eighth pictures), causing the ratchet 12 to also lean against the ratchet plate 3 on one side and touch it. The meshing relationship between the two enables the motor 1 to generate a non-rotatable force relative to the wheel body 4 through the non-rotatable output shaft 11 via the gear 13 and the internal gear 41, thereby achieving the automatic braking effect. In this case, when the parent does not hold the sensor switch unit 5 for a moment, this case can immediately play the role of stopping the stroller and making it immobile, thus achieving the purpose of improving safety.

And if you want to move the trolley again after the automatic braking function occurs, please cooperate with the ninth figure and press your hand on the sensor switch unit 5 at 91 of the trolley handle so that the inside of the motor 1 can rotate freely. , and at the same time push the wheel body 4 slightly in the opposite direction, and cooperate with the elastic force of the elastic element 24, the wheel body 4 can be made The ratchet wheel 12 is released from contact with the ratchet plates 3, and the holder 2 is reset to the middle of the two ratchet plates 3 to facilitate the movement of the trolley.

To sum up, the "automatic braking device for trolleys" in this case does not require the use of electricity to achieve the function of automatically stopping the trolley when letting go, effectively improving the safety of use. The technical content of this case fully meets the requirements for obtaining an invention patent. This case has indeed been utilized in industry. It has not been published in publications or publicly used before the application, and it is not a technology known to the public. Furthermore, this case effectively solves the long-standing problems in the previous technology and meets the long-term needs of relevant users and consumers, which proves that this new technology cannot be easily completed. This case is full of the requirements of "industrial applicability", "novelty" and "progressivity" stipulated in the patent law. A patent is filed in accordance with the law. We sincerely request the Office to conduct a detailed investigation and approve the patent as soon as possible to protect the applicant's wisdom. Property rights encourage innovation.

The present invention has been described in detail through the above-mentioned embodiments and variations. However, those skilled in the art should understand that all embodiments of the present invention are only illustrative and not restrictive. That is, without departing from the essential spirit and scope of the present invention, based on the above description, and other variations and modifications are all covered by the present invention, and the present invention is defined by the appended patent scope.

1: Motor

12: Ratchet

2:Bearing

3: Spiny plate

4: Wheel body

5: Induction switch unit

91:Grip

92:axle

Claims (10)

An automatic braking device for a trolley, including: an induction switch unit located at a handle of the trolley; a motor, which includes an output shaft and passes through a ratchet and a gear successively; one or both outer sides of the ratchet are provided with a The ratchet plate; the motor is installed on a support seat, and the motor is connected with two wires, and the two wires are connected to the induction switch unit; the motor is fixed on a support seat, and a bushing is provided at the bottom of the support seat. The bushing is penetrated by a wheel axle of the trolley; an elastic element is assembled on both sides of the bearing seat, and a positioning element is provided at the outer end of the elastic element; the positioning element is connected to the structure of the trolley; and at least one wheel body is included , an internal gear is provided on the inner edge of the wheel body, and the internal gear is coupled with the gear, so that the internal gear, the gear and the output shaft are in a linked relationship. For example, in the automatic braking device for a trolley described in item 1 of the patent application, the motor is a permanent magnet motor structure. For example, in the automatic braking device for a trolley described in item 1 of the patent application, when the two conductors of the motor form a broken circuit, the interior of the motor will be able to rotate freely in conjunction with the output shaft; when the two conductors of the motor form a closed circuit, the motor will A load effect occurs and the motor cannot rotate freely internally. For example, in the automatic braking device for a trolley described in item 1 of the patent application, the output shaft, the ratchet wheel and the gear are in a linked relationship. The automatic braking device for a trolley described in item 1 of the patent application, wherein the ratchet plate and the ratchet wheel are located on the same plane. For example, in the automatic braking device for a trolley described in Item 1 of the patent application, the inner edge of the ratchet plate is provided with an outer ratchet, and the ratchet ring is provided with a ratchet, and the outer ratchet and the ratchet can be used for mating. For example, in the automatic braking device for a trolley described in Item 1 of the patent application, the base includes a support plate, and the motor is fixed on the support plate. For example, in the automatic braking device for a trolley described in Item 1 of the patent application, a protrusion is provided on both sides of the support, and the protrusion provides assembly and positioning of one end of the elastic element. As in the automatic braking device for a trolley described in item 8 of the patent application, the opposite end of the elastic element is assembled to the positioning element. As in the automatic braking device for a trolley described in Item 1 of the patent application, the sensor switch unit at least includes either a push-type structure or a bending-type structure.

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