Brake control circuit and manual wheelchair

Abstract

The brake control circuit comprises a control module, a switch module, a driving module, an execution mechanism and a power supply module, the switch module is used for generating a brake trigger signal or a brake release signal, and the switch module is electrically connected with the control module. The control module is electrically connected with the driving module. The driving module is electrically connected with the executing mechanism and used for controlling the executing mechanism to work, and the executing mechanism is used for driving a brake device of the manual wheelchair to brake or release brake. The power supply module is used for supplying power. A user presses down the switch module to generate a brake trigger signal or a brake release signal, and when the control module receives the brake trigger signal, the actuating mechanism is controlled through the driving module to drive the brake device to brake. And when the control module receives the brake release signal, the actuating mechanism is controlled by the driving module to drive the brake device to release the brake.

Description

Technical Field

[0001] The present application relates to the technical field of manual wheelchairs, and in particular to a brake control circuit and a manual wheelchair. Background Art

[0002] At present, the hand-pushed wheelchairs on the market basically use mechanical brake devices. Mechanical brakes require a certain torque to control the brake handle when braking. When the user's braking torque is insufficient, the mechanical brake may not brake in place, resulting in false braking, which will reduce the braking effect of the wheelchair or cause failure, and then cause safety accidents. Especially for the elderly, using mechanical brakes is a very strenuous thing. Once the braking is not in place, it may cause a safety accident and cause physical injuries to the user. Utility Model Content

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a brake control circuit and a manual wheelchair, which can solve the problems of inconvenient braking operation, reduced braking effect and failure of traditional manual wheelchairs.

[0004] The brake control circuit according to the first aspect of the present application is applied to a manual wheelchair, comprising:

[0005] Control module;

[0006] A switch module, the switch module is used to generate a brake trigger signal or a brake release signal, and the switch module is electrically connected to the control module;

[0007] A driving module, wherein the control module is electrically connected to the driving module;

[0008] An actuator, wherein the driving module is electrically connected to the actuator to control the operation of the actuator, and the actuator is used to drive the brake device of the manual wheelchair to brake or release the brake;

[0009] The power supply module is used for power supply.

[0010] The braking control circuit according to the first aspect of the present application has at least the following beneficial effects:

[0011] The user generates a brake trigger signal or a brake release signal by pressing the switch module. When the control module receives the brake trigger signal, it controls the actuator through the drive module to drive the brake device to brake. When the control module receives the brake release signal, it controls the actuator through the drive module to drive the brake device to release the brake. Compared with the traditional manual wheelchair technology, the brake control circuit of the embodiment of the present application only needs to press the switch module to achieve braking, which is easy to operate. The braking torque is provided by the actuator, avoiding the problem that the braking torque provided by the user is insufficient, resulting in inadequate braking and causing reduced braking effect or failure.

[0012] According to some embodiments of the present application, the switch module includes a first switch and a second switch, the first switch is arranged on a first armrest of the manual wheelchair, and the second switch is arranged on a second armrest of the manual wheelchair.

[0013] According to some embodiments of the present application, one end of the first switch and the second switch are both electrically connected to the power supply module, and the other ends of the first switch and the second switch are both electrically connected to the control module.

[0014] According to some embodiments of the present application, the actuator includes a first motor and a second motor, the drive module is electrically connected to the first motor and the second motor, the braking device of the manual wheelchair includes a first braking mechanism and a second braking mechanism, the first braking mechanism is arranged on the first wheel of the manual wheelchair, and the second braking mechanism is arranged on the second wheel of the manual wheelchair, the output shaft of the first motor is transmission-connected to the first braking mechanism, and the output end of the second motor is transmission-connected to the second braking mechanism.

[0015] According to some embodiments of the present application, the driving module includes a first H-bridge circuit and a second H-bridge circuit, the first H-bridge circuit and the second H-bridge circuit are both electrically connected to the control module, the first H-bridge circuit is electrically connected to the first motor, and the second H-bridge circuit is electrically connected to the second motor.

[0016] According to some embodiments of the present application, the first H-bridge circuit includes a first MOS tube, a second MOS tube, a third MOS tube and a fourth MOS tube, the sources of the first MOS tube and the second MOS tube are both electrically connected to the power supply module, the gates of the first MOS tube and the second MOS tube are both electrically connected to the control module, the drain of the first MOS tube is connected to the first end of the first motor, the drain of the second MOS tube is connected to the second end of the first motor, the sources of the third MOS tube and the fourth MOS tube are both grounded, the gates of the third MOS tube and the fourth MOS tube are both electrically connected to the control module, the drain of the third MOS tube is connected to the first end of the first motor, and the drain of the fourth MOS tube is connected to the second end of the first motor.

[0017] According to some embodiments of the present application, the second H-bridge circuit includes a fifth MOS tube, a sixth MOS tube, a seventh MOS tube and an eighth MOS tube, the sources of the fifth MOS tube and the sixth MOS tube are electrically connected to the power supply module, the gates of the fifth MOS tube and the sixth MOS tube are electrically connected to the control module, the drain of the fifth MOS tube is connected to the first end of the second motor, the drain of the sixth MOS tube is connected to the second end of the second motor, the sources of the seventh MOS tube and the eighth MOS tube are grounded, the gates of the seventh MOS tube and the eighth MOS tube are electrically connected to the control module, the drain of the seventh MOS tube is connected to the first end of the second motor, and the drain of the eighth MOS tube is connected to the second end of the second motor.

[0018] According to some embodiments of the present application, the actuator also includes a first gearbox and a second gearbox, the output shaft of the first motor is connected to the input end of the first gearbox, the output end of the first gearbox is connected to the first brake mechanism, the output shaft of the second motor is connected to the input end of the second gearbox, and the output end of the second gearbox is connected to the second brake mechanism.

[0019] According to some embodiments of the present application, a display module is further included, and the control module is electrically connected to the display module for displaying the braking status of the manual wheelchair.

[0020] A manual wheelchair according to an embodiment of the second aspect of the present application includes the above-mentioned brake control circuit.

[0021] The manual wheelchair according to the second aspect of the present application has at least the following beneficial effects:

[0022] The user generates a brake trigger signal or a brake release signal by pressing the switch module. When the control module receives the brake trigger signal, it controls the actuator through the drive module to drive the brake device to brake. When the control module receives the brake release signal, it controls the actuator through the drive module to drive the brake device to release the brake. Compared with the traditional manual wheelchair technology, the manual wheelchair of the embodiment of the present application only needs to press the switch module to achieve braking, which is easy to operate. The braking torque is provided by the actuator, avoiding the problem that the braking torque provided by the user is insufficient, resulting in inadequate braking and causing reduced braking effect or failure.

[0023] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present application is further described below with reference to the accompanying drawings and embodiments, wherein:

[0025] Figure 1 This is a functional block diagram of a brake control circuit in one embodiment of the present application;

[0026] Figure 2 A circuit diagram of a control module in an embodiment of the present application;

[0027] Figure 3 A circuit diagram of a switch module in an embodiment of the present application;

[0028] Figure 4 A circuit diagram of a first H-bridge circuit in an embodiment of the present application;

[0029] Figure 5 A circuit diagram of a second H-bridge circuit in an embodiment of the present application;

[0030] Figure 6 This is a structural diagram of a first gearbox in an embodiment of the present application;

[0031] Figure 7 This is a circuit diagram of a first LED lamp in an embodiment of the present application;

[0032] Figure 8 FIG. 4 is a circuit diagram of a second LED lamp in an embodiment of the present application.

[0033] Reference numerals:

[0034] MCU100,

[0035] Switch module 200,

[0036] The first H-bridge circuit 300,

[0037] The second H-bridge circuit 400,

[0038] The first gear box 500, the input end 510, the output end 520,

[0039] The second gear box 600,

[0040] Display module 700,

[0041] Power supply module 800.

[0042] A first protection circuit 900 and a second protection circuit 910 . DETAILED DESCRIPTION

[0043] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0044] In the description of the present application, it should be understood that the descriptions involving orientation, such as the orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0045] In the description of this application, "a plurality" means more than two. If there is a description of "first" or "second", it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0046] In the description of this application, unless otherwise clearly defined, terms such as setting, installation, and electrical connection should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0047] Refer to the following Figures 1 to 8 A brake control circuit and a manual wheelchair according to an embodiment of the present application are described.

[0048] The brake control circuit of the embodiment of the present application is applied to a manual wheelchair, such as Figure 1As shown, it includes: a control module U1, a switch module 200, a drive module, an actuator and a power supply module 800. The switch module 200 is used to generate a brake trigger signal or a brake release signal, and the switch module 200 is electrically connected to the control module U1. The control module U1 is electrically connected to the drive module. The drive module is electrically connected to the actuator to control the operation of the actuator, and the actuator is used to drive the brake device of the manual wheelchair to brake or release the brake. The power supply module 800 is used to supply power. Figure 2 As shown, the control module U1 is MCU100.

[0049] In this embodiment, the user generates a brake trigger signal or a brake release signal by pressing the switch module 200. When the control module U1 receives the brake trigger signal, it controls the actuator through the drive module to drive the brake device to brake. When the control module U1 receives the brake release signal, it controls the actuator through the drive module to drive the brake device to release the brake. Compared with the traditional manual wheelchair technology, the brake control circuit of the embodiment of the present application only needs to press the switch module 200 to achieve braking. The operation is convenient. The braking torque is provided by the actuator, which avoids the problem that the braking torque provided by the user is insufficient, resulting in inadequate braking and causing reduced braking effect or failure.

[0050] In one embodiment of the present application, Figure 3 As shown, the switch module 200 includes a first switch K1 and a second switch K2. The first switch K1 is arranged on a first armrest of the manual wheelchair, and the second switch K2 is arranged on a second armrest of the manual wheelchair.

[0051] In this embodiment, by arranging the first switch K1 and the second switch K2 on the first armrest and the second armrest of the manual wheelchair respectively, the user can perform the braking operation or the braking release operation with the left hand and / or the right hand, which is convenient to use.

[0052] In one embodiment of the present application, one end of the first switch K1 and the second switch K2 are both electrically connected to the power supply module 800 , and the other end of the first switch K1 and the second switch K2 are both electrically connected to the control module U1 .

[0053] In this embodiment, the user generates a brake trigger signal by pressing the first switch K1 and / or the second switch K2 for a period of time exceeding a preset time threshold, so that the control module U1 performs brake control after receiving the brake trigger signal. When the manual wheelchair is in a braking state, the user presses the first switch K1 and / or the second switch K2, and the pressing time is less than the preset time threshold, and a brake release signal is generated, so that the control module U1 releases the brake control after receiving the brake release signal.

[0054] It is understandable that the preset time threshold can be set according to a specific application scenario, for example, the preset time threshold is set to 3 seconds.

[0055] In one embodiment of the present application, the actuator includes a first motor M1 and a second motor M2, the drive module is electrically connected to the first motor M1 and the second motor M2, the braking device of the manual wheelchair includes a first braking mechanism and a second braking mechanism, the first braking mechanism is arranged on the first wheel of the manual wheelchair, and the second braking mechanism is arranged on the second wheel of the manual wheelchair, the output shaft of the first motor M1 is transmission-connected to the first braking mechanism, and the output end 520 of the second motor M2 is transmission-connected to the second braking mechanism.

[0056] In this embodiment, when the control module U1 receives a brake trigger signal, the control module U1 drives the first motor M1 and the second motor M2 to rotate forward through the drive module. The first motor M1 drives the first brake mechanism to brake the first wheel, and the second motor M2 drives the second brake mechanism to brake.

[0057] It can be understood that the first motor M1 and the second motor M2 operate synchronously.

[0058] In one embodiment of the present application, Figure 1 As shown, the driving module includes a first H-bridge circuit 300 and a second H-bridge circuit 400. The first H-bridge circuit 300 and the second H-bridge circuit 400 are both electrically connected to the control module U1. The first H-bridge circuit 300 is electrically connected to the first motor M1, and the second H-bridge circuit 400 is electrically connected to the second motor M2.

[0059] In this embodiment, the control module U1 can drive the first motor M1 and the second motor M2 to rotate forward or reverse respectively through the first H-bridge circuit 300 and the second H-bridge circuit 400. When the first motor M1 and the second motor M2 rotate forward, the first brake mechanism and the second brake mechanism are driven to brake. When the first motor M1 and the second motor M2 rotate reversely, the first brake mechanism and the second brake mechanism are driven to release the brake.

[0060] In one embodiment of the present application, Figure 4 As shown, the first H-bridge circuit 300 includes a first MOS tube Q1, a second MOS tube Q2, a third MOS tube Q3 and a fourth MOS tube Q4, the sources of the first MOS tube Q1 and the second MOS tube Q2 are both electrically connected to the power supply module 800, the gates of the first MOS tube Q1 and the second MOS tube Q2 are both electrically connected to the control module U1, the drain of the first MOS tube Q1 is connected to the first end of the first motor M1, the drain of the second MOS tube Q2 is connected to the second end of the first motor M1, the sources of the third MOS tube Q3 and the fourth MOS tube Q4 are both grounded, the gates of the third MOS tube Q3 and the fourth MOS tube Q4 are both electrically connected to the control module U1, the drain of the third MOS tube Q3 is connected to the first end of the first motor M1, and the drain of the fourth MOS tube Q4 is connected to the second end of the first motor M1.

[0061] In this embodiment, the control module U1 controls the first MOS tube Q1 and the fourth MOS tube Q4 to be turned off, the second MOS tube Q2 and the third MOS tube Q3 to be turned on, and the first motor M1 rotates forward. The control module U1 controls the first MOS tube Q1 and the fourth MOS tube Q4 to be turned on, the second MOS tube Q2 and the third MOS tube Q3 to be turned off, and the first motor M1 rotates reversely.

[0062] It can be understood that the first MOS tube Q1 and the second MOS tube Q2 are P-type MOS tubes, and the third MOS tube Q3 and the fourth MOS tube Q4 are N-type MOS tubes.

[0063] In one embodiment of the present application, Figure 5 As shown, the second H-bridge circuit 400 includes a fifth MOS tube Q5, a sixth MOS tube Q6, a seventh MOS tube Q7 and an eighth MOS tube Q8, the sources of the fifth MOS tube Q5 and the sixth MOS tube Q6 are electrically connected to the power supply module 800, the gates of the fifth MOS tube Q5 and the sixth MOS tube Q6 are electrically connected to the control module U1, the drain of the fifth MOS tube Q5 is connected to the first end of the second motor M2, the drain of the sixth MOS tube Q6 is connected to the second end of the second motor M2, the sources of the seventh MOS tube Q7 and the eighth MOS tube Q8 are grounded, the gates of the seventh MOS tube Q7 and the eighth MOS tube Q8 are electrically connected to the control module U1, the drain of the seventh MOS tube Q7 is connected to the first end of the second motor M2, and the drain of the eighth MOS tube Q8 is connected to the second end of the second motor M2.

[0064] In this embodiment, the control module U1 controls the fifth MOS tube Q5 and the eighth MOS tube Q8 to be turned off, the sixth MOS tube Q6 and the seventh MOS tube Q7 to be turned on, and the first motor M1 rotates forward. The control module U1 controls the fifth MOS tube Q5 and the eighth MOS tube Q8 to be turned on, the sixth MOS tube Q6 and the seventh MOS tube Q7 to be turned off, and the second motor M2 rotates reversely.

[0065] It can be understood that the fifth MOS tube Q5 and the sixth MOS tube Q6 are P-type MOS tubes, and the seventh MOS tube Q7 and the eighth MOS tube Q8 are N-type MOS tubes.

[0066] In one embodiment of the present application, the actuator further includes a first gearbox 500 and a second gearbox 600, the output shaft of the first motor M1 is connected to the input end 510 of the first gearbox 500, the output end 520 of the first gearbox 500 is connected to the first brake mechanism, the output shaft of the second motor M2 is connected to the input end 510 of the second gearbox 600, and the output end 520 of the second gearbox 600 is connected to the second brake mechanism. Figure 6 As shown, Figure 6 is a schematic diagram of the structure of the first gear box 500 . The structure of the second gear box 600 is the same as that of the first gear box 500 .

[0067] In this embodiment, the first motor M1 rotates forward, the output shaft of the first motor M1 drives the first gearbox 500 to rotate, the first gearbox 500 drives the drive shaft of the first brake mechanism to move in the first direction, and the first brake mechanism brakes the first wheel. The first motor M1 rotates reversely, the output shaft of the first motor M1 drives the first gearbox 500 to rotate, the first gearbox 500 drives the drive shaft of the first brake mechanism to move in the second direction, the second direction is opposite to the first movement direction, and the first brake mechanism releases the brake on the first wheel. The second motor M2 rotates forward, the output shaft of the second motor M2 drives the second gearbox 600 to rotate, the second gearbox 600 drives the drive shaft of the second brake mechanism to move in the first direction, and the second brake mechanism brakes the first wheel. The second motor M2 rotates reversely, the output shaft of the second motor M2 drives the second gearbox 600 to rotate, the second gearbox 600 drives the drive shaft of the second brake mechanism to move in the second direction, the second direction is opposite to the first movement direction, and the second brake mechanism releases the brake on the first wheel.

[0068] It is understandable that the first gear box 500 and the second gear box 600 are both provided with a self-locking device, which can prevent the wheelchair from sliding. When the first motor M1 and the second motor M2 are reversed, the self-locking device is released from the self-locking state.

[0069] In one embodiment of the present application, Figure 1 As shown, a display module 700 is also included, and the control module U1 is electrically connected to the display module 700 for displaying the braking status of the manual wheelchair.

[0070] In this embodiment, Figures 7 and 8 As shown, the display module 700 includes a first LED lamp LED1 and a second LED lamp LED2. The control module U1 is connected to the positive pole of the first LED lamp LED1, and the negative pole of the first LED lamp LED1 is grounded. The control module U1 is connected to the positive pole of the second LED lamp LED2, and the negative pole of the second LED lamp LED2 is grounded. When the manual wheelchair brakes, the control module U1 controls the first LED lamp LED1 to light up and the second LED lamp LED2 to go out, thereby reminding the user that the manual wheelchair is in a braking state. When the manual wheelchair brakes, the control module U1 controls the first LED lamp LED1 to go out and the second LED lamp LED2 to light up, thereby reminding the user that the manual wheelchair is in a hand-pushing working state.

[0071] In one embodiment of the present application, the power supply module 800 includes a battery device and a power management circuit, and the battery device is electrically connected to the power management circuit.

[0072] In this embodiment, the battery module may be a storage battery, a power bank, etc. The battery module provides a stable power supply through a power management circuit.

[0073] An embodiment of the present application further includes a first protection circuit 900 and a second protection circuit 910 . The first protection circuit 900 is respectively connected to the first H-bridge circuit 300 and the control module U1 , and the second protection circuit 910 is respectively connected to the second H-bridge circuit 400 and the control module U1 .

[0074] In addition, an embodiment of the present application also discloses a manual wheelchair, comprising the above-mentioned brake control circuit.

[0075] In this embodiment, the user generates a brake trigger signal or a brake release signal by pressing the switch module 200. When the control module U1 receives the brake trigger signal, it controls the actuator through the drive module to drive the brake device to brake. When the control module U1 receives the brake release signal, it controls the actuator through the drive module to drive the brake device to release the brake. Compared with the traditional manual wheelchair technology, the manual wheelchair of the embodiment of the present application only needs to press the switch module 200 to achieve braking. The operation is convenient. The braking torque is provided by the actuator, which avoids the problem that the braking torque provided by the user is insufficient, resulting in inadequate braking and causing reduced braking effect or failure.

[0076] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present application.

Claims

1. A brake control circuit, applied to a manual wheelchair, characterized in that: include: Control module; A switch module, the switch module is used to generate a brake trigger signal or a brake release signal, the switch module is electrically connected to the control module, the switch module includes a first switch and a second switch, the first switch is arranged on the first armrest of the manual wheelchair, and the second switch is arranged on the second armrest of the manual wheelchair; A driving module, wherein the control module is electrically connected to the driving module; An actuator, the driving module is electrically connected to the actuator to control the operation of the actuator, and the actuator is used to drive the brake device of the manual wheelchair to brake or release the brake; the actuator includes a first motor and a second motor, the driving module is electrically connected to the first motor and the second motor, the brake device of the manual wheelchair includes a first brake mechanism and a second brake mechanism, the first brake mechanism is arranged on the first wheel of the manual wheelchair, the second brake mechanism is arranged on the second wheel of the manual wheelchair, the output shaft of the first motor is drivingly connected to the first brake mechanism, and the output end of the second motor is drivingly connected to the second brake mechanism; The driving module includes a first H-bridge circuit and a second H-bridge circuit, the first H-bridge circuit and the second H-bridge circuit are both electrically connected to the control module, the first H-bridge circuit is electrically connected to the first motor, and the second H-bridge circuit is electrically connected to the second motor; The power supply module is used for power supply.

2. The brake control circuit according to claim 1, characterized in that: One end of the first switch and the second switch are both electrically connected to the power supply module, and the other end of the first switch and the second switch are both electrically connected to the control module.

3. The brake control circuit according to claim 1, characterized in that: The first H-bridge circuit includes a first MOS tube, a second MOS tube, a third MOS tube and a fourth MOS tube, the sources of the first MOS tube and the second MOS tube are both electrically connected to the power supply module, the gates of the first MOS tube and the second MOS tube are both electrically connected to the control module, the drain of the first MOS tube is connected to the first end of the first motor, the drain of the second MOS tube is connected to the second end of the first motor, the sources of the third MOS tube and the fourth MOS tube are both grounded, the gates of the third MOS tube and the fourth MOS tube are both electrically connected to the control module, the drain of the third MOS tube is connected to the first end of the first motor, and the drain of the fourth MOS tube is connected to the second end of the first motor.

4. The brake control circuit according to claim 1, characterized in that: The second H-bridge circuit includes a fifth MOS tube, a sixth MOS tube, a seventh MOS tube and an eighth MOS tube, the sources of the fifth MOS tube and the sixth MOS tube are electrically connected to the power supply module, the gates of the fifth MOS tube and the sixth MOS tube are electrically connected to the control module, the drain of the fifth MOS tube is connected to the first end of the second motor, the drain of the sixth MOS tube is connected to the second end of the second motor, the sources of the seventh MOS tube and the eighth MOS tube are grounded, the gates of the seventh MOS tube and the eighth MOS tube are electrically connected to the control module, the drain of the seventh MOS tube is connected to the first end of the second motor, and the drain of the eighth MOS tube is connected to the second end of the second motor.

5. The brake control circuit according to claim 1, characterized in that: The actuator also includes a first gearbox and a second gearbox, the output shaft of the first motor is connected to the input end of the first gearbox, the output end of the first gearbox is connected to the first brake mechanism, the output shaft of the second motor is connected to the input end of the second gearbox, and the output end of the second gearbox is connected to the second brake mechanism.

6. The brake control circuit according to claim 1, characterized in that: It also includes a display module, and the control module is electrically connected to the display module for displaying the braking state of the manual wheelchair.

7. A manual wheelchair, characterized in that: The invention comprises a brake control circuit as claimed in any one of claims 1 to 6.

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