CN110946719A

CN110946719A - Auxiliary carrier

Info

Publication number: CN110946719A
Application number: CN201811116198.4A
Authority: CN
Inventors: 吴立伟; 曾智鸿; 谢伟麟; 李宗磬; 吴剑鸿
Original assignee: Karma Medical Products Co Ltd
Current assignee: Karma Medical Products Co Ltd
Priority date: 2018-09-25
Filing date: 2018-09-25
Publication date: 2020-04-03

Abstract

An auxiliary carrier comprises a carrier body, a cover, a control unit, a first driving unit and a first current detection unit, wherein the cover, the control unit, the first driving unit and the first current detection unit are arranged on the carrier body, the control unit receives a first input instruction and a first current detection signal and generates a first control signal according to the first input instruction and the first current detection signal, the first driving unit receives a first input current and the first control signal and drives the cover to move between a first opening position and a first closing position according to the first input instruction and the first control signal, the first current detection unit detects the first input current and generates the first current detection signal which indicates a first current value of the first input current to the control unit according to the first input current, and when the control unit judges that the first current value is larger than a first preset threshold value, the control unit adjusts the first control signal, so that the first driving unit stops driving the cover to move according to the first control signal.

Description

Auxiliary carrier

Technical Field

The present invention relates to a carrier, and more particularly, to an auxiliary carrier for assisting a user with mobility impairment.

Background

The existing auxiliary vehicles such as wheelchairs and the like are all electrically driven, so that the electric energy is converted into power to drive the vehicles such as wheelchairs and the like to move, and a user who is inconvenient to move can be helped to move more easily and conveniently when the vehicles such as wheelchairs and the like are used for assisting the user to move. In addition, the chair of the existing wheelchair also has the function of placing articles for the user.

However, when a user places an object on a chair of an existing wheelchair, if the wheelchair is collided or greatly shaken due to an obstacle during movement, the object placed on the wheelchair will fall off, which is inconvenient for the user to use. Therefore, there is still room for improvement in the conventional auxiliary vehicle.

Disclosure of Invention

The object of the present invention is to provide an auxiliary vehicle which overcomes the drawbacks of the prior art.

The auxiliary carrier comprises a carrier body, a cover arranged on the carrier body, a control unit, a first driving unit and a first current detection unit.

The control unit is arranged on the carrier body and used for receiving a first input instruction, receiving a first current detection signal and generating a first control signal according to the first input instruction and the first current detection signal.

The first driving unit is arranged on the carrier body and connected with the control unit and the cover, and is used for receiving a first input current and a first control signal from the control unit and driving the cover to move between a first opening position and a first closing position according to the first control signal and the first input current.

The first current detection unit is arranged on the carrier body, is electrically connected with the control unit, is used for detecting the first input current, generates a first current detection signal according to the first input current and outputs the first current detection signal to the control unit, and the first current detection signal indicates a first current value of the first input current.

When the control unit judges that the first current value is larger than a first preset threshold value, the control unit adjusts the first control signal generated by the control unit, so that the first driving unit stops driving the cover to move according to the first control signal.

The auxiliary carrier of the invention also comprises a display unit.

The display unit is arranged on the cover and electrically connected with the control unit, the display unit comprises a display screen, when the cover moves to the first closing position, the control unit controls the display screen to display carrier use information and energy information of the auxiliary carrier, and when the cover moves to the first opening position, the control unit controls the display screen to display warning information.

The invention relates to an auxiliary carrier, which is characterized in that a carrier body is provided with a containing chamber, a cover is provided with a top cover part and two side plate parts which are arranged on the left and right sides of the top cover part and extend from the left and right side edges of the top cover part to the direction of the carrier body, a first driving unit comprises two servo motors which are respectively arranged on the left and right sides in the carrier body and are respectively pivoted with the side plate parts, each servo motor receives a first control signal and a first input current to synchronously drive a corresponding one of the side plate parts to pivot and swing back and forth, so that the cover moves between a first opening position and a first closing position, when the cover moves to the first opening position, the containing chamber is not isolated from an external space, and when the cover moves to the first closing position, the containing chamber is isolated from the external space.

The control unit of the auxiliary vehicle of the present invention is further configured to receive a second input command, receive a second current detection signal, and generate a second control signal according to at least the second input command and the second current detection signal, and the auxiliary vehicle further includes a pedal, a second driving unit, a transmission unit, and a second current detection unit.

The pedal is arranged on the carrier body.

The second driving unit is disposed on the carrier body, electrically connected to the control unit, and configured to receive a second input current, receive the second control signal from the control unit, and perform one of converting the second input current into a mechanical force and stopping converting the second input current into the mechanical force according to the second control signal.

The transmission unit is arranged on the carrier body and is pivoted with the second driving unit and the pedal, and the transmission unit receives the mechanical force from the second driving unit and rotates according to the mechanical force to drive the pedal to move between a second opening position and a second closing position.

The second current detection unit is arranged on the carrier body, electrically connected with the control unit, and used for detecting the second input current, generating a second current detection signal according to the second input current and outputting the second current detection signal to the control unit, wherein the second current detection signal indicates a second current value of the second input current.

The auxiliary carrier of the invention: the second driving unit comprises a motor which is arranged on the carrier body and receives the second input current and the second control signal; the transmission unit comprises a transmission member which is driven by the motor to extend and shorten, and a pivot swing member, the pivot swing member is provided with a front end part fixedly connected to the rear side of the pedal, a rear end part pivoted to the front end of the transmission member, and a pivoting end which is positioned between the front end part and the rear end part and pivoted to the carrier body, and the motor drives the transmission member to extend and contract to drive the pivot swing member to swing so as to drive the pedal to move between the second opening position and the second closing position.

When the control unit determines that the second current value is greater than a second preset threshold, the control unit adjusts the second control signal generated by the control unit, so that the second driving unit stops converting the second input current into the mechanical force according to the second control signal.

When the pedal moves to the second opening position, the pedal is parallel to the ground, the pedal and the vehicle body define a containing space for a user to place two feet together, and when the pedal moves to the closing position, the pedal is approximately vertical to the ground and leans against the vehicle body.

The auxiliary carrier of the invention also comprises a first sensing unit.

The first sensing unit is arranged on the carrier body and electrically connected with the control unit, senses the accommodating space to generate a first sensing signal indicating a first distance, and outputs the first sensing signal to the control unit, so that the control unit also generates the second control signal according to the first sensing signal.

When the control unit judges that the second current value is larger than at least one of a second preset threshold value and the first distance is smaller than a preset distance, the control unit adjusts the second control signal generated by the control unit, so that the second driving unit stops converting the second input current into the mechanical force according to the second control signal.

The auxiliary carrier of the invention further comprises a second sensing unit.

The second sensing unit is arranged on the carrier body and electrically connected with the control unit, when the pedal moves to the second closing position, the second sensing unit senses a space to be detected from the front side of the carrier body to the ground so as to generate a second sensing signal indicating a second distance, and the second sensing signal is output to the control unit, so that the control unit judges whether the auxiliary carrier meets an obstacle or a pit according to the second sensing signal.

The auxiliary carrier of the invention further comprises a third sensing unit.

The third sensing unit is arranged on the lower surface of the pedal and electrically connected with the control unit, and when the pedal moves to the second opening position, the third sensing unit is used for sensing the ground to generate a third sensing signal indicating a third distance and outputting the third sensing signal to the control unit, so that the control unit judges whether the ground has an obstacle or a concave hole according to the third sensing signal.

The auxiliary carrier of the invention further comprises a third sensing unit.

The third sensing unit is arranged on the lower surface of the pedal and electrically connected with the control unit, when the pedal moves to the second closing position, the third sensing unit detects the front of the carrier body to generate a third sensing signal indicating a third distance, and the third sensing signal is output to the control unit, so that the control unit judges whether an obstacle exists in front of the carrier body according to the third sensing signal.

The auxiliary carrier of the invention further comprises a third sensing unit.

The third sensing unit is arranged on the lower surface of the pedal and electrically connected with the control unit, when the pedal moves between the second opening position and the second closing position, the third sensing unit correspondingly senses one of the ground and the front of the carrier body to generate a third sensing signal indicating a third distance, and the third sensing signal is output to the control unit, so that the control unit also generates the second control signal according to the third sensing signal.

When the control unit judges that the second current value is larger than at least one of the second preset threshold value, the first distance is smaller than the preset distance and the third distance is smaller than the other preset distance, the control unit adjusts the second control signal generated by the control unit, so that the second driving unit stops converting the second input current into the mechanical force according to the second control signal.

The invention has the beneficial effects that: because the cover can be controlled to move between the first opening position and the first closing position, when a user places an article on a chair of the auxiliary carrier, the article placed on the chair can be prevented from falling off by moving the cover to the first closing position, so that the auxiliary carrier is convenient for the user to use.

Drawings

Fig. 1 is a block diagram illustrating an embodiment of an auxiliary vehicle according to the present invention;

FIG. 2 is a perspective view illustrating the movement of a lid and a pedal of the embodiment to a first open position and a second open position, respectively; and

fig. 3 is a perspective view illustrating the cover and the pedal of the embodiment moved to a first closed position and a second closed position, respectively.

Detailed Description

Referring to fig. 1 to 3, an embodiment of an auxiliary vehicle 1 according to the present invention includes a vehicle body 10, a cover 11, a pedal 12, a control unit 13, first and

second driving units

14 and 15, a transmission unit 16, first and second

current detecting units

17 and 18, a display unit 19, and first to

third sensing units

20, 21, and 22.

In the present embodiment, the cover 11, the pedal 12, the control unit 13, the first and

second driving units

14, 15, the first and second

current detecting units

17, 18, the transmission unit 16, and the first and

second sensing units

20, 21 are all disposed on the carrier body 10. The carrier body 10 has a chamber 100, the lid 11 has a top lid portion 111, and two

side plate portions

112, 113 disposed left and right and extending from left and right edges of the top lid portion 111 to the direction of the carrier body 10.

The control unit 13 is configured to receive first and second input commands Ci1, Ci2, first and second current detection signals Id1, Id2, and first to third sensing signals S1 to S3. The control unit 13 generates a first control signal C1 according to the first input command Ci1 and the first current detection signal Id1, and generates a second control signal C2 according to the second input command Ci2, the second current detection signal Id2, and the first and third sensing signals S1, S3. It should be noted that, in the present embodiment, the first input command Ci1 is generated by a user performing an input operation related to opening or closing the cover 11 on an input interface 23, and the second input command Ci2 is generated by a user performing an input operation related to opening or closing the pedal 12 on the input interface 23. However, in practical implementation, a single input command may be used to open or close the cover 11 and the pedal 12 synchronously, or a remote controller and a general handheld electronic device may be used to replace the input interface 23, so the implementation is not limited to the above-mentioned embodiment.

The first driving unit 14 is connected to the control unit 13 and the cover 11, and is configured to receive a first input current I1 from a power supply (not shown), receive the first control signal C1 from the control unit 13, and drive the cover 11 to move between a first open position and a first closed position according to the first control signal C1 and the first input current I1. Further referring to fig. 2 and 3, the cover 11 is shown moved to the first open position and the first closed position, respectively. In fig. 2, the chamber 100 is not isolated from the external space when the lid 11 is moved to the first open position. In fig. 3, the chamber 100 is isolated from the external space when the lid 11 is moved to the first closed position. It should be noted that, in the present embodiment, the auxiliary vehicle 1 further includes a chair 24 and a backrest 25 (see fig. 2).

In the present embodiment, the first driving unit 14 includes two

servo motors

141, 142 respectively disposed at the left and right sides of the carrier body 10 and respectively pivoted to the

side plates

112, 113. Each

servo motor

141, 142 receives the first control signal C1 and the first input current I1 to synchronously drive a corresponding one of the

side plate portions

112, 113 to swing back and forth, so that the cover 11 moves between the first open position and the first closed position.

The second driving unit 15 is electrically connected to the control unit 13 and includes a motor 151 disposed on the carrier body 10. The motor 151 is configured to receive a second input current I2 from the power supply and the second control signal C2 from the control unit 13, and perform one of converting the second input current I2 into a mechanical force and stopping converting the second input current I2 into the mechanical force according to the second control signal C2.

The transmission unit 16 is pivotally connected to the second driving unit 15 and the pedal 12, and the transmission unit 16 receives the mechanical force from the second driving unit 15 and rotates according to the mechanical force to drive the pedal 12 to move between a second open position and a second closed position. In fig. 2, when the pedal 12 moves to the second open position, the pedal 12 is parallel to the ground, and the pedal 12 and the vehicle body 10 together define a receiving space for the user to place both feet. In fig. 3, when the pedal 12 is moved to the closed position, the pedal 12 is approximately perpendicular to the ground and abuts against the vehicle body 10.

In the present embodiment, the transmission unit 16 includes a transmission member 161 driven by the motor 151 to extend and contract, and a pivot swing member 162. The pivotal member 162 has a front end 1621 fixed to the rear side of the pedal 12, a rear end 1622 pivotally connected to the front end of the transmission member 161, and a pivotal end 1623 located between the front end 1621 and the rear end 1622 and pivotally connected to the carrier body 10. The motor 151 drives the transmission member 161 to extend and retract and drives the pivot swinging member 162 to swing, so as to drive the pedal 12 to move between the second open position and the second closed position.

The first current detecting unit 17 is electrically connected to the control unit 13, and is configured to detect the first input current I1, and accordingly generate the first current detecting signal Id1 and output the first current detecting signal Id1 to the control unit 13. The first current detection signal Id1 indicates a first current value of the first input current I1.

The second current detecting unit 18 is electrically connected to the control unit 13, and is configured to detect the second input current I2, and accordingly generate the second current detecting signal Id2 and output the second current detecting signal Id2 to the control unit 13. The second current detection signal Id2 indicates a second current value of the second input current I2.

The display unit 19 is disposed on the cover 11 and electrically connected to the control unit 13, and the display unit 19 includes a display screen 191. When the cover 11 moves to the first closed position, the control unit 13 controls the display screen 191 to display the vehicle usage information and the energy information of the auxiliary vehicle 1. When the cover 11 moves to the first open position, the control unit 13 controls the display screen 191 to display a warning message. In addition, the control unit 13 can also transmit the vehicle usage information and the energy information to the handheld electronic device of the user in a wireless transmission manner.

The first sensing unit 20 is electrically connected to the control unit 13, and periodically (e.g., continuously) senses the accommodating space to generate the first sensing signal S1 indicating a first distance, and outputs the first sensing signal S1 to the control unit 13. In the present embodiment, the first sensing unit 20 includes two

distance sensors

201 and 202, but is not limited thereto.

The second sensing unit 21 is electrically connected to the control unit 13, and when the pedal 12 moves to the second closed position, the second sensing unit 21 periodically (for example, continuously) senses a space to be measured from the front side of the vehicle body 10 to the ground to generate the second sensing signal S2 indicating a second distance, and outputs the second sensing signal S2 to the control unit 13, so that when the pedal 12 moves to the second closed position, the control unit 13 determines whether the auxiliary vehicle 1 encounters an obstacle or a pothole according to the second sensing signal S2. For example, when an obstacle or a pothole is encountered, the second distance changes, so that the control unit 13 knows that the auxiliary vehicle 1 encounters the obstacle or the pothole according to the second sensing signal S2, and the control unit 13 can control a related driving unit (not shown) in the auxiliary vehicle 1 to change the moving direction of the auxiliary vehicle 1. In the present embodiment, the second sensing unit 21 includes two

distance sensors

211 and 212, but is not limited thereto.

The third sensing unit 22 is disposed on the lower surface of the pedal 12 and electrically connected to the control unit 13. The third sensing unit 22 is used for periodically (e.g. continuously) sensing one of the ground and the front of the vehicle body 10 to generate the third sensing signal S3 indicating a third distance, and outputting the third sensing signal S3 to the control unit 13. In this embodiment, when the pedal 12 moves to the second open position, the third sensing unit 22 is used for sensing the ground, and the control unit 13 determines whether there is an obstacle or a hole on the ground according to the third sensing signal S3 generated by the third sensing unit 22. When the pedal 12 moves to the second closed position, the third sensing unit 22 detects the front of the vehicle body 10, and the control unit 13 determines whether there is an obstacle in front of the vehicle body 10 according to the third sensing signal S3. It should be noted that the third sensing unit 22 includes two

distance sensors

221, 222, but is not limited thereto. When the control unit 13 determines that there is an obstacle or a concave hole on the ground, or determines that there is an obstacle in front of the vehicle body 10 (i.e., the third distance changes), the control unit 13 may control the related driving units in the auxiliary vehicle 1 to stop the auxiliary vehicle 1 or change the moving direction of the auxiliary vehicle 1.

The following further details how the movement of the cover 11 and the pedal 12 is controlled.

When the cover 11 is operated to move, a user performs an input operation related to opening (or closing) the cover 11 on the input interface 23, so that the input interface 23 correspondingly generates the first input command Ci1 according to the input operation of the user. Then, the control unit 13 generates the first control signal C1 according to the first input command Ci1 and the first current detection signal Id1, so that the first driving unit 14 is controlled by the first control signal C1 to move the lid 11 to the first open position (or the first closed position) according to the first input current I1. Meanwhile, during the movement of the cover 11, the control unit 13 determines whether the first current value indicated by the first current detection signal Id1 generated by the first current detection unit 17 is greater than a first predetermined threshold. When the determination result is negative, it indicates that the cover 11 is not obstructed, and the first driving unit 14 continues to drive the cover 11 to move according to the first control signal C1. If the determination result is yes, it indicates that the cover 11 is obstructed (e.g. the user touches the cover 11), so that the first current value is increased to be larger than the first preset threshold, at this time, the control unit 13 correspondingly adjusts the first control signal C1 generated by the control unit to make the first driving unit 14 stop driving the cover 11 to move according to the first control signal C1, so that the auxiliary vehicle 1 has a safety protection mechanism.

In addition, when the pedal 12 is operated to move, the user performs an input operation related to turning on (or turning off) the pedal 12 on the input interface 23, so that the input interface 23 correspondingly generates the second input command Ci2 according to the input operation of the user. Next, the control unit 13 generates the second control signal C2 according to the second input command Ci2, the second current detection signal Id2, and the first and third sensing signals S1 and S3, so that the second driving unit 15 converts the second input current I2 into the mechanical force or stops converting the second input current I2 into the mechanical force according to the second control signal C2. When the second driving unit 15 is switched to the mechanical force, the transmission unit 16 rotates according to the mechanical force and drives the pedal 12 to move to the second open position (or the second closed position).

For example, during the period when the control unit 13 receives the second input command Ci2 and generates the second control signal C2, the control unit 13 determines whether the second current value indicated by the second current detection signal Id2 is greater than a second predetermined threshold, or whether the first distance indicated by the first sensing signal S1 is less than a predetermined distance, or whether the third distance indicated by the third sensing signal S3 is less than another predetermined distance. When the second current value is determined to be greater than the second predetermined threshold, it indicates, for example, that the pedal 12 is obstructed (e.g., the pedal 12 still has articles or the user's feet placed thereon), and when the first distance is determined to be less than the predetermined distance, it indicates, for example, that the user's feet are still placed on the pedal 12 so that the first distance is less than the predetermined distance, and when the third distance is determined to be less than the other predetermined distance, it indicates, for example, that the user's feet or obstacles are directly below the pedal 12 so that the third distance is less than the other predetermined distance. When the second current value is not greater than the second predetermined threshold and the first and third distances are not less than the predetermined distance and the other predetermined distance, respectively, the second control signal C2 generated by the control unit 13 controls the second driving unit 15 to convert the second input current I2 into the mechanical force, so that the transmission unit 16 rotates according to the mechanical force and drives the pedal 12 to move. When the control unit 13 determines that the second current value is greater than the second predetermined threshold, the first distance is less than the predetermined distance, or the third distance is less than the other predetermined distance, the control unit 13 adjusts the second control signal C2 generated by the control unit, so that the second driving unit 15 stops converting the second input current I2 into the mechanical force according to the second control signal C2, and the transmission unit 16 stops rotating and stops driving the pedal 12 to move, so that the auxiliary vehicle 1 has a safety protection mechanism.

In summary, since the cover 11 of the auxiliary carrier 1 of the present embodiment can be controlled to move between the first open position and the first closed position, when a user places an object on the chair 24, the cover 11 can be moved to the first closed position, so as to prevent the object placed on the chair 24 from falling off, and the auxiliary carrier 1 is convenient for the user to use. In addition, the control unit 13 adjusts the first control signal C1 generated by the control unit according to the first current value indicated by the first current detection signal Id1 to stop the movement of the lid 11 when the lid is obstructed, and adjusts the second control signal C2 generated by the control unit according to the second current value indicated by the second current detection signal Id2 or the first distance indicated by the first sensing signal S1 to stop the movement of the pedal 12 when the lid is obstructed, so that the auxiliary vehicle 1 has a safety protection mechanism. In addition, the second and

third sensing units

21 and 22 sense the front side of the vehicle body 10 and transmit a sensing signal back to the control unit 13 to determine whether the auxiliary vehicle 1 meets an obstacle, so that the auxiliary vehicle 1 has an obstacle avoidance function.

The above description is only an example of the present invention, and the scope of the present invention should not be limited thereby, and the invention is still within the scope of the present invention by simple equivalent changes and modifications made according to the claims and the contents of the specification.

Claims

1. An auxiliary vehicle, comprising:

a carrier body;

a cover disposed on the carrier body;

the control unit is arranged on the carrier body and used for receiving a first input instruction, receiving a first current detection signal and generating a first control signal according to the first input instruction and the first current detection signal;

the first driving unit is arranged on the carrier body and connected with the control unit and the cover, and is used for receiving a first input current and a first control signal from the control unit and driving the cover to move between a first opening position and a first closing position according to the first control signal and the first input current; and

the first current detection unit is arranged on the carrier body, is electrically connected with the control unit, is used for detecting the first input current, generates a first current detection signal according to the first input current and outputs the first current detection signal to the control unit, and the first current detection signal indicates a first current value of the first input current;

2. The auxiliary carrier of claim 1, further comprising:

3. The auxiliary carrier of claim 1, wherein: the carrier body is provided with a containing chamber, the cover is provided with a top cover part and two side plate parts which are arranged on the left side and the right side of the top cover part and extend towards the carrier body from the left side edge and the right side edge of the top cover part, the first driving unit comprises two servo motors which are respectively arranged on the left side and the right side of the carrier body and are respectively pivoted with the side plate parts, each servo motor receives the first control signal and the first input current to synchronously drive a corresponding one of the side plate parts to pivot and swing back and forth, so that the cover moves between the first opening position and the first closing position, when the cover moves to the first opening position, the containing chamber is not isolated from an external space, and when the cover moves to the first closing position, the containing chamber is isolated from the external space.

4. The auxiliary carrier of claim 1, wherein the control unit is further configured to receive a second input command, receive a second current detection signal, and generate a second control signal according to at least the second input command and the second current detection signal, and the auxiliary carrier further comprises:

a pedal arranged on the carrier body;

the second driving unit is arranged on the carrier body, is electrically connected with the control unit, and is used for receiving a second input current, receiving the second control signal from the control unit, and converting the second input current into one of a mechanical force and stopping converting the second input current into the mechanical force according to the second control signal;

the transmission unit is arranged on the carrier body and is pivoted with the second driving unit and the pedal, and the transmission unit receives the mechanical force from the second driving unit and rotates according to the mechanical force to drive the pedal to move between a second opening position and a second closing position; and

the second current detection unit is arranged on the carrier body, is electrically connected with the control unit, is used for detecting the second input current, generates a second current detection signal according to the second input current and outputs the second current detection signal to the control unit, and the second current detection signal indicates a second current value of the second input current.

5. The auxiliary carrier of claim 4, wherein:

the second driving unit comprises a motor which is arranged on the carrier body and receives the second input current and the second control signal; and

the transmission unit comprises a transmission member which is driven by the motor to extend and shorten, and a pivot swing part, wherein the pivot swing part is provided with a front end part fixedly connected to the rear side of the pedal, a rear end part pivoted to the front end of the transmission member, and a pivoting end which is positioned between the front end part and the rear end part and pivoted to the carrier body, and the motor drives the transmission member to extend and contract to drive the pivot swing part to swing so as to drive the pedal to move between the second opening position and the second closing position.

6. The auxiliary carrier of claim 4, wherein: when the control unit judges that the second current value is larger than a second preset threshold value, the control unit adjusts the second control signal generated by the control unit, so that the second driving unit stops converting the second input current into the mechanical force according to the second control signal.

7. The auxiliary carrier of claim 4, wherein: when the pedal moves to the second opening position, the pedal is parallel to the ground, the pedal and the carrier body define a containing space for a user to place two feet together, and when the pedal moves to the closing position, the pedal is approximately vertical to the ground and leans against the carrier body.

8. The auxiliary carrier of claim 7, further comprising:

the first sensing unit is arranged on the carrier body and electrically connected with the control unit, senses the accommodating space to generate a first sensing signal indicating a first distance and outputs the first sensing signal to the control unit, so that the control unit also generates the second control signal according to the first sensing signal;

9. The auxiliary carrier of claim 4, further comprising:

10. The auxiliary carrier of claim 4, further comprising:

11. The auxiliary carrier of claim 4, further comprising:

12. The auxiliary carrier of claim 8, further comprising:

the third sensing unit is arranged on the lower surface of the pedal and is electrically connected with the control unit, when the pedal moves between the second opening position and the second closing position, the third sensing unit correspondingly senses one of the ground and the front of the carrier body so as to generate a third sensing signal indicating a third distance, and the third sensing signal is output to the control unit, so that the control unit also generates the second control signal according to the third sensing signal;