Top rushing prevention protection circuit and massage chair

Abstract

The utility model relates to the technical field of massage armchair manufacturing, and provides an anti-collision protection circuit and a massage armchair, which comprise a driving module connected with a walking motor, a trigger module, a first protection module, a second protection module and a feedback module, the output end of the first protection module is connected with the signal input end of the driving module, and the input end is connected with an input power supply; the input end of the trigger module is connected with an internal main loop of the first protection module and is also connected with the feedback module; the feedback end of the second protection module is connected with the feedback module, and the output end is connected with the signal input end of the driving module. When the trigger module detects that the walking motor moves to the upper / lower limit, the first protection module is triggered to control the driving module to stop working; meanwhile, the second protection module is triggered through the feedback module, double braking is conducted on the driving module, output of the driving module to the walking motor is stopped, and therefore the safety of the massage chair mechanism and a user is protected.

Description

Technical Field

[0001] The utility model relates to the technical field of massage chair manufacturing, in particular to an anti-top impact protection circuit and a massage chair. Background Art

[0002] With the continuous development of the economy and the accelerating pace of people's lives, people are paying more and more attention to their physical and mental health. The proportion of "sub-healthy" people in China has reached about 70%, exceeding 900 million people. Using massage for health care is a traditional project of Chinese medicine. It is suitable for all ages and has a wide range of applications. With the emergence of various massage appliances with health care functions such as massage chairs, massage bathtubs, massage foot basins and other products, they are also popular among consumers in a "sub-healthy" life state because of their significant effects in relieving stress and fatigue. The huge demand and development space will surely make various types of home massage equipment develop strongly and become a new growth point for the health industry.

[0003] In existing massage chairs, some specific structures are equipped with walking motor configurations so that the massage position can be from the neck to the calf. In order to prevent the walking motor from encountering unpredictable problems and exceeding the upper or lower limit, an anti-collision mechanism has been introduced. The Chinese patent "Massage Chair Motor Anti-collision Protection Device" with application number CN202120296134.8 discloses that "the Hall induction counter body is used to replace the micro switch, and magnets are respectively installed at the upper and lower limit positions of the first rotating screw rod. The Hall induction counter body is used to detect the magnet and transmit the signal to the external PCB board. The PCB board is electrically connected to the motor. When the magnet moves to the limit position corresponding to the upper end of the Hall induction counter body, the external PCB board is used to detect the signal change of the Hall induction counter body. When the signal change is detected, the electrically connected motor will be disconnected. "However, this type of massage chair still simply disconnects the motor power supply, and the disconnection action is performed by the main chip, which depends on the response program of the main chip. When the program is stuck, it will not be able to effectively stop the rotation of the motor, which poses a safety hazard. Summary of the invention

[0004] The utility model provides an anti-top impact protection circuit and a massage chair, which solve the technical problems that the existing anti-top impact mechanism of the massage chair depends on the program operation of the main chip, has a low reaction rate and has potential safety hazards.

[0005] In order to solve the above technical problems, the utility model provides an anti-top impact protection circuit, including a driving module connected to a walking motor, and also including a trigger module, a first protection module, a second protection module and a feedback module; the output end of the first protection module is connected to the signal input end of the driving module, and the input end is connected to an input power supply; the input end of the trigger module is connected to the internal main circuit of the first protection module, and is also connected to the feedback module; the feedback end of the second protection module is connected to the feedback module, and the output end is connected to the signal input end of the driving module.

[0006] This basic solution connects a first protection module to the driving module of the walking motor, and configures a trigger module on the massage chair, and connects the trigger module with the first protection module and the feedback module. When the trigger module detects that the walking motor moves to the upper / lower limit, the first protection module is triggered to control the driving module to stop working; at the same time, the second protection module is triggered through the feedback module to perform double braking on the driving module and stop the driving module's output to the walking motor, thereby protecting the safety of the massage chair mechanism and the user.

[0007] In a further embodiment, the first protection module includes a first resistor, a second resistor, a first diode and a second diode; one end of the first resistor is connected to the input power supply, the other end is connected to the positive electrode of the first diode, and the negative electrode of the first diode is connected to the signal input terminal B1 of the driving module; one end of the second resistor is connected to the input power supply, the other end is connected to the positive electrode of the second diode, and the negative electrode of the second diode is connected to the signal input terminal F1 of the driving module.

[0008] In this solution, a pull-up resistor is set to access a high level. When the trigger module is working normally, the high level is grounded through the pull-up resistor, and the diode effectively prevents the current backflow at the signal input end of the driving module, and does not interfere with the normal signal control of the driving module; when the trigger module is triggered, the high level is input to the trigger module via the pull-up resistor and the diode, and high-level braking is performed, with a simple structure and high sensitivity.

[0009] In a further embodiment, the trigger module includes a first touch switch and a second touch switch; one end of the first touch switch is connected as an input end between the first resistor and the anode of the first diode, and the other end is grounded; one end of the second touch switch is connected as an input end between the second resistor and the anode of the second diode, and the other end is grounded.

[0010] This solution uses a normally closed touch switch as a limit trigger device. On the one hand, it can effectively detect the top-jumping action of the walking motor; on the other hand, during normal operation, the short-circuit first protection module ensures the normal operation of the driving module. When top-jumping occurs, the short-circuit grounded auxiliary pull-up resistor is disconnected to output a high level to the signal input end of the driving module for top-jumping protection. The device has low cost and high response rate.

[0011] In a further embodiment, the feedback module includes a third resistor and a fourth resistor, one end of the third resistor is connected to one end of the first touch switch, and the other end is connected to the feedback end of the second protection module; one end of the fourth resistor is connected to one end of the second touch switch, and the other end is connected to the feedback end of the second protection module.

[0012] In a further implementation scheme, the second protection module includes a main control chip and a fifth resistor and a sixth resistor. The main control chip includes an output interface IO1 and an output interface IO2. The output interface IO1 is connected to the signal input terminal B1 of the driving module through the fifth resistor, and the output interface IO2 is connected to the signal input terminal F1 of the driving module through the sixth resistor.

[0013] In a further embodiment, the main control chip is an MCU.

[0014] This solution is based on the management function of the massage chair main control module. The feedback pin is connected to the input end of the trigger module through the third resistor / fourth resistor. By detecting whether the trigger module is turned on, it is determined whether a top-up occurs, and then the drive signal output to the signal input end of the drive module is adjusted. It is combined with the first protection module to form a dual signal output control to achieve dual protection against top-up.

[0015] In a further implementation scheme, the driving module includes a driving chip for a walking motor, and the driving chip includes a signal input terminal B1 and a signal input terminal F1. The signal input terminal B1 is electrically connected to the output interface IO1 of the first protection module and the main control chip; the signal input terminal F1 is electrically connected to the output interface IO2 of the first protection module and the main control chip.

[0016] The utility model also provides a massage chair, comprising a chair body, and a travel motor and a main control circuit board installed inside the chair body, wherein the main control circuit board is provided with an anti-top impact protection circuit as described above.

[0017] The massage chair in this solution adopts a circuit with anti-top impact protection and has an anti-top impact function, which can further improve the safety of the massage chair and enhance the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1This is a system framework diagram of an anti-top impact protection circuit and a massage chair provided by an embodiment of the utility model;

[0019] Figure 2 The utility model embodiment provides Figure 1 The hardware circuit diagram in ;

[0020] Among them: a first resistor R1 to a sixth resistor R6, a first diode D1, a second diode D2, a first touch switch SW1, a second touch switch SW2, a main control chip U1, and a driving chip U2;

[0021] Travel motor 1, drive module 2, trigger module 3, first protection module 4, second protection module 5, feedback module 6. DETAILED DESCRIPTION

[0022] The following is a detailed explanation of the implementation mode of the present invention in conjunction with the accompanying drawings. The embodiments are provided for illustrative purposes only and cannot be understood as limitations on the present invention. The accompanying drawings are provided for reference and illustration only and do not constitute limitations on the scope of patent protection of the present invention, because many changes can be made to the present invention without departing from the spirit and scope of the present invention.

[0023] Example 1

[0024] The utility model provides an anti-top protection circuit, such as Figure 1 , Figure 2 As shown, in this embodiment, it includes a driving module 2 connected to the walking motor 1, and also includes a trigger module 3, a first protection module 4, a second protection module 5 and a feedback module 6; the output end of the first protection module 4 is connected to the signal input end of the driving module 2, and the input end is connected to the input power supply; the input end of the trigger module 3 is connected to the internal main circuit of the first protection module 4, and is also connected to the feedback module 6; the feedback end of the second protection module 5 is connected to the feedback module 6, and the output end is connected to the signal input end of the driving module 2.

[0025] In this embodiment, the first protection module 4 includes a first resistor R1, a second resistor R2, a first diode D1 and a second diode D2; one end of the first resistor R1 is connected to the input power supply, and the other end is connected to the positive electrode of the first diode D1, and the cathode of the first diode D1 is connected to the signal input terminal B1 of the driving module 2; one end of the second resistor R2 is connected to the input power supply, and the other end is connected to the positive electrode of the second diode D2, and the cathode of the second diode D2 is connected to the signal input terminal F1 of the driving module 2.

[0026] In this solution, a pull-up resistor is set to access a high level. When the trigger module 3 works normally, the high level is grounded through the pull-up resistor, and the diode effectively prevents the current backflow at the signal input end of the driving module 2, and does not interfere with the normal signal control of the driving module 2; when the trigger module 3 is triggered, the high level is input to the trigger module 3 via the pull-up resistor and the diode, and high-level braking is performed, with a simple structure and high sensitivity.

[0027] In this embodiment, the trigger module 3 includes a first touch switch SW1 and a second touch switch SW2; one end of the first touch switch SW1 is connected as an input end between the first resistor R1 and the positive electrode of the first diode D1, and the other end is grounded; one end of the second touch switch SW2 is connected as an input end between the second resistor R2 and the positive electrode of the second diode D2, and the other end is grounded.

[0028] This solution adopts a normally closed touch switch as a limit trigger device, which can effectively detect the top-jumping action of the walking motor 1 on the one hand; on the other hand, during normal operation, the short-circuit first protection module 4 ensures the normal operation of the driving module 2. When top-jumping occurs, the short-circuit grounded auxiliary pull-up resistor is disconnected to output a high level to the signal input terminal of the driving module 2 for top-jumping protection. The device has low cost and high response rate.

[0029] In this embodiment, the feedback module 6 includes a third resistor R3 and a fourth resistor R4, one end of the third resistor R3 is connected to one end of the first touch switch SW1, and the other end is connected to the feedback end of the second protection module 5; one end of the fourth resistor R4 is connected to one end of the second touch switch SW2, and the other end is connected to the feedback end of the second protection module 5.

[0030] In this embodiment, the second protection module 5 includes a main control chip U1 and a fifth resistor R5 and a sixth resistor R6. The main control chip U1 includes an output interface IO1 and an output interface IO2. The output interface IO1 is connected to the signal input terminal B1 of the driving module 2 through the fifth resistor R5, and the output interface IO2 is connected to the signal input terminal F1 of the driving module 2 through the sixth resistor R6.

[0031] In this embodiment, the main control chip U1 includes but is not limited to chips such as MCU that have data processing functions.

[0032] This solution is based on the management function of the massage chair main control module. The feedback pin is connected to the input end of the trigger module 3 through the third resistor R3 / fourth resistor R4. By detecting whether the trigger module 3 is turned on, it is determined whether a top-up occurs, and then the drive signal output to the signal input end of the drive module 2 is adjusted. It is combined with the first protection module 4 to form a dual signal output control to achieve dual protection against top-up.

[0033] The driving module 2 includes a driving chip U2 of the walking motor 1, and the driving chip U2 includes a signal input terminal B1 and a signal input terminal F1. The signal input terminal B1 is electrically connected to the first protection module 4 and the output interface IO1 of the main control chip U1; the signal input terminal F1 is electrically connected to the first protection module 4 and the output interface IO2 of the main control chip U1.

[0034] Among them, the output interface IO1 and the output interface IO2 of the main control chip U1 can output high / low levels to control the driving module 2 to drive the walking motor 1 forward and reverse. This is a conventional technical means in the field and will not be repeated in this embodiment.

[0035] In the embodiment of the utility model, a first protection module 4 is connected to the driving module 2 of the walking motor 1, and a trigger module 3 is configured on the massage chair. The trigger module 3 is connected with the first protection module 4 and the feedback module 6. When the trigger module 3 detects that the walking motor 1 moves to the upper / lower limit, the first protection module 4 is triggered to control the driving module 2 to stop working; at the same time, the second protection module 5 is triggered through the feedback module 6 to perform double braking on the driving module 2 and stop the output of the driving module 2 to the walking motor 1, thereby protecting the safety of the massage chair mechanism and the user.

[0036] Example 2

[0037] The utility model also provides a massage chair, comprising a chair body, and a travel motor 1 and a main control circuit board installed inside the chair body, wherein the main control circuit board is provided with an anti-top impact protection circuit as described above.

[0038] The first touch switch SW1 and the second touch switch SW2 are installed in the travel track limit area of ​​the travel motor 1 .

[0039] Taking the main control chip U1 as MCU as an example, the working principle of this embodiment is as follows:

[0040] When the walking motor 1 is working normally, the first touch switch SW1 and the second touch switch SW2 are in the normally closed state. At this time, the input power supply VCC is grounded through the first resistor R1 and the first touch switch SW1 (and also grounded through the second resistor R2 and the second touch switch SW2), and the feedback pins Limit-Signal-IN1 and Limit-Signal-IN2 of the MCU receive low-level signals; no current flows through the first diode D1 and the second diode D2. The signal input terminals B1 and F1 of the driver chip U2 only input the drive signal of the MCU.

[0041] When the walking motor 1 reaches the limit area of ​​the walking track, the first touch switch SW1 / the second touch switch SW2 is triggered, and the first touch switch SW1 / the second touch switch SW2 is switched from the normally closed state to the normally open state. At this time, the input power supply VCC outputs a high level to the signal input terminal B1 through the first resistor R1 and the first diode D1, and the input power supply VCC also outputs a high level to the signal input terminal F1 through the second resistor R2 and the second diode D2; so that the drive module 2 (drive chip U2) drives the walking motor 1 to stop working. At the same time, the feedback pins Limit-Signal-IN1 and Limit-Signal-IN2 of the MCU receive high-level signals; the MCU outputs high-level drive signals to the signal input terminals B1 and F1, realizing dual input control protection, and the drive module 2 (drive chip U2) drives the walking motor 1 to stop working.

[0042] The massage chair in this embodiment adopts a circuit with anti-top impact protection and has an anti-top impact function, which can further improve the safety of the massage chair and enhance the user experience.

[0043] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited by the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principle of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. An anti-top protection circuit, comprising a drive module connected to a travel motor, characterized in that: It also includes a trigger module, a first protection module, a second protection module and a feedback module; the output end of the first protection module is connected to the signal input end of the driving module, and the input end is connected to the input power supply; the input end of the trigger module is connected to the internal main circuit of the first protection module, and is also connected to the feedback module; the feedback end of the second protection module is connected to the feedback module, and the output end is connected to the signal input end of the driving module.

2. The anti-overburst protection circuit according to claim 1, characterized in that: The first protection module includes a first resistor, a second resistor, a first diode and a second diode; one end of the first resistor is connected to the input power supply, the other end is connected to the positive electrode of the first diode, and the negative electrode of the first diode is connected to the signal input terminal B1 of the driving module; one end of the second resistor is connected to the input power supply, the other end is connected to the positive electrode of the second diode, and the negative electrode of the second diode is connected to the signal input terminal F1 of the driving module.

3. An anti-overburst protection circuit as claimed in claim 2, characterized in that: The trigger module includes a first touch switch and a second touch switch; one end of the first touch switch is connected between the first resistor and the anode of the first diode as an input end, and the other end is grounded; one end of the second touch switch is connected between the second resistor and the anode of the second diode as an input end, and the other end is grounded.

4. The anti-overburst protection circuit according to claim 3, characterized in that: The feedback module includes a third resistor and a fourth resistor, one end of the third resistor is connected to one end of the first touch switch, and the other end is connected to the feedback end of the second protection module; one end of the fourth resistor is connected to one end of the second touch switch, and the other end is connected to the feedback end of the second protection module.

5. The anti-overburst protection circuit according to claim 4, characterized in that: The second protection module includes a main control chip and a fifth resistor and a sixth resistor. The main control chip includes an output interface IO1 and an output interface IO2. The output interface IO1 is connected to the signal input terminal B1 of the driving module through the fifth resistor, and the output interface IO2 is connected to the signal input terminal F1 of the driving module through the sixth resistor.

6. The anti-overburst protection circuit according to claim 5, characterized in that: The main control chip is MCU.

7. The anti-overburst protection circuit according to claim 5, characterized in that: The driving module includes a driving chip for the walking motor, and the driving chip includes a signal input terminal B1 and a signal input terminal F1. The signal input terminal B1 is electrically connected to the output interface IO1 of the first protection module and the main control chip; the signal input terminal F1 is electrically connected to the output interface IO2 of the first protection module and the main control chip.

8. A massage chair, characterized in that: It comprises a chair body, and a walking motor and a main control circuit board installed inside the chair body, wherein the main control circuit board is provided with an anti-top impact protection circuit as claimed in any one of claims 1 to 7.

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