Electric sofa anti-pinch system and electric sofa

Abstract

The utility model discloses an electric sofa anti-pinch system and an electric sofa, and belongs to the technical field of intelligent furniture. The electric sofa anti-pinch system comprises a thin film pressure sensor, a driving module and a control module. A trigger mechanism of the thin film pressure sensor is arranged in an extrusion risk area of a moving part in the electric sofa; the thin film pressure sensor is used for outputting a detection signal when the triggering mechanism is extruded; the driving module is connected with the moving part and is used for driving the moving part to operate; the control module is respectively connected with the thin film pressure sensor and the driving module, and the control module is used for controlling the moving part to stop running or reversely run through the driving module when receiving the detection signal. According to the embodiment of the utility model, the reliability of the anti-pinch system of the electric sofa can be improved, the anti-pinch effect is improved, and the use safety of the electric sofa is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of intelligent furniture, in particular to an electric sofa anti-pinch system and an electric sofa. Background Art

[0002] As a kind of intelligent furniture in contemporary society, electric sofas have an increasing market share. If electric sofas clamp people, animals or other foreign objects during operation, it will cause serious accidents, so the anti-pinch function of electric sofas is becoming more and more important.

[0003] In the related art, it is generally determined whether a foreign object is clamped by installing an infrared pyroelectric sensor or a capacitive sensor, or by collecting parameters such as the motor current and speed. However, infrared pyroelectric sensors are greatly affected by the environment and are prone to misjudgment; capacitive sensors need to be connected to the entire sofa iron frame, which is complicated to install and can only be triggered when people and animals are clamped, and cannot identify non-living foreign objects; judging by motor current and speed can only be detected during the operation of the motor, and the triggering force required is relatively large and the parameter processing process is complicated, which is prone to missed judgments and misjudgments. In summary, the existing electric sofas have poor anti-pinch effects and low reliability. Utility Model Content

[0004] The utility model provides an electric sofa anti-pinch system and an electric sofa, so as to improve the reliability of the electric sofa anti-pinch system, enhance the anti-pinch effect, and enhance the use safety of the electric sofa.

[0005] In a first aspect, an embodiment of the utility model provides an anti-pinch system for an electric sofa, comprising:

[0006] A thin film pressure sensor, wherein a trigger mechanism of the thin film pressure sensor is arranged in a squeeze risk area of ​​a moving part in an electric sofa; the thin film pressure sensor is used to output a detection signal when the trigger mechanism is squeezed;

[0007] A driving module, connected to the moving component, and used to drive the moving component to operate;

[0008] The control module is connected to the film pressure sensor and the driving module respectively, and is used for controlling the moving part to stop running or reverse running through the driving module when receiving the detection signal.

[0009] Optionally, the electric sofa includes at least one moving part, the driving module includes at least one driving motor, and one driving motor is connected to at least one moving part; at least one film pressure sensor is provided corresponding to the extrusion risk area of ​​each moving part;

[0010] The control module is used to control the moving component to stop running or run in reverse through the driving motor connected to the moving component corresponding to the film pressure sensor when receiving the detection signal output by any of the film pressure sensors.

[0011] Optionally, the moving part includes: a footrest; the extrusion risk area of ​​the footrest is the back side of the footrest;

[0012] The driving module comprises: a first driving motor connected to a leg driving assembly in the footrest.

[0013] Optionally, the moving component further comprises: a lifting component, the lifting component comprising: a lifting drive assembly, a seat frame bracket and two armrests, the seat frame bracket is connected between the two armrests, and the seat frame bracket is connected to the lifting drive assembly; the extrusion risk area of ​​the lifting component comprises the bottom surface of the seat frame bracket and the bottom surfaces of the two armrests;

[0014] The first drive motor is also connected to the lifting drive assembly; or the drive module further includes: a second drive motor connected to the lifting drive assembly.

[0015] Optionally, the moving component further comprises: a backrest; the extrusion risk area of ​​the backrest is the rear side of the backrest;

[0016] The first drive motor is also connected to a backrest drive assembly in the backrest; or, the drive module further includes: a third drive motor connected to the backrest drive assembly in the backrest.

[0017] Optionally, the electric sofa further comprises: a base frame fixedly connected to a side of the lifting drive assembly away from the seat frame bracket;

[0018] The electric sofa anti-pinch system also includes:

[0019] At least one infrared sensor; the infrared sensor is connected to the control module, and the transmitting end and the receiving end of the infrared sensor are arranged opposite to each other on the base frame; wherein, when there is no foreign matter on the base frame, there is no obstruction between the transmitting end and the receiving end of the infrared sensor; the control module is also used to control all the moving parts to stop running through the driving module when the receiving end of at least one of the infrared sensors cannot receive an infrared signal.

[0020] Optionally, the base frame comprises: two first support rods arranged in parallel, and two second support rods connected between the two first support rods and arranged in parallel;

[0021] The at least one infrared sensor comprises:

[0022] At least one first infrared sensor; a transmitting end and a receiving end of the first infrared sensor are respectively arranged opposite to each other on the two first support rods;

[0023] And / or, at least one second infrared sensor; a transmitting end and a receiving end of the second infrared sensor are respectively arranged opposite to each other on the two second support rods.

[0024] Optionally, the electric sofa anti-pinch system also includes: an resistance feedback module connected to the control module; the control module is also used to control the resistance feedback module to give a foreign object prompt when the moving part is controlled to stop running or reverse running through the driving module; wherein the resistance feedback module includes: at least one of a buzzer, a vibrator and an indicator light.

[0025] Optionally, the resistance feedback module includes: a buzzer and a first transistor; one end of the buzzer is connected to a first power supply signal, the other end of the buzzer is connected to a first electrode of the first transistor, the control electrode of the first transistor is connected to the control module, and the second electrode of the first transistor is grounded.

[0026] Optionally, the electric sofa anti-pinch system further includes: a power module; the power module includes: a power conversion chip, the input end of the power conversion chip is connected to the first power signal, the ground end of the power conversion chip is grounded, and the output end of the power conversion chip is connected to the control module;

[0027] And / or, the electric sofa anti-pinch system also includes: a sensor detection module; the sensor detection module includes: a first resistor, a second resistor, a third resistor, a first capacitor and a first electrostatic protection diode; the first end of the first resistor is connected to the output end of the film pressure sensor or the output end of the infrared sensor, the second end of the first resistor is respectively connected to the first end of the second resistor, the first end of the third resistor and the first end of the first electrostatic protection diode, the second end of the second resistor is connected to the second power supply signal, the second end of the third resistor is connected to the control module, the second end of the first electrostatic protection diode is grounded, the first end of the first capacitor is connected to the second end of the third resistor, and the second end of the first capacitor is grounded;

[0028] And / or, the electric sofa also includes: a hand controller; the electric sofa anti-pinch system also includes: a hand controller signal detection module; the hand controller signal detection module includes: at least one key signal detection unit corresponding to at least one function key in the hand controller; the key signal detection unit includes: a fourth resistor, a fifth resistor, a sixth resistor, a second capacitor and a second electrostatic protection diode; the first end of the fourth resistor is connected to the function key corresponding to the key signal detection unit, the second end of the fourth resistor is respectively connected to the first end of the fifth resistor, the first end of the sixth resistor and the first end of the second electrostatic protection diode, the second end of the fifth resistor is connected to the control module, the second end of the sixth resistor is grounded, the second end of the second electrostatic protection diode is grounded, the first end of the second capacitor is connected to the second end of the fifth resistor, and the second end of the second capacitor is grounded.

[0029] Optionally, the electric sofa anti-pinch system also includes: a motor drive module corresponding one to one to the drive motor; the motor drive module includes: a motor drive chip, the input end of the motor drive chip is connected to the control module, and the output end of the motor drive chip is connected to the drive motor corresponding to the motor drive module.

[0030] Optionally, the electric sofa anti-pinch system also includes: a current acquisition module corresponding one to one with the motor drive module; the current acquisition module includes: a seventh resistor, an eighth resistor and a third capacitor; the first end of the seventh resistor is connected to the ground terminal of the motor drive chip, the second end of the seventh resistor is grounded, the first end of the eighth resistor is connected to the ground terminal of the motor drive chip, the second end of the eighth resistor is respectively connected to the first end of the third capacitor and the control module, and the second end of the third capacitor is grounded.

[0031] Optionally, a trigger mechanism of the film pressure sensor is correspondingly arranged in one of the extrusion risk areas;

[0032] Wherein, the trigger mechanism covers the extrusion risk area, and the trigger mechanism is in a sheet, mesh or grid shape; or, the trigger mechanism is arranged around the edge of the extrusion risk area, and the trigger mechanism is in a ring, U-shape or strip shape.

[0033] Optionally, the pressure sensing sensitivity of the thin film pressure sensor is less than 0.1N.

[0034] In a second aspect, an embodiment of the utility model further provides an electric sofa, comprising: a moving part and an electric sofa anti-pinch system as provided in any embodiment of the utility model.

[0035] In the electric sofa anti-pinch system provided by the embodiment of the utility model, a film pressure sensor is set as an anti-pinch detection device. When the control module receives the detection signal output by the film pressure sensor, it determines that a foreign object is clamped and triggers the anti-pinch function. The driving module controls the moving parts to stop moving or move in the opposite direction to realize the anti-pinch function. Compared with infrared sensors and capacitive sensors, the film pressure sensor can be triggered to output a detection signal when it is clamped on a person or an animal, and it can also be triggered to output a detection signal when it is clamped on other non-living foreign objects, which can effectively improve the recognition range and safety of the electric sofa anti-pinch system. In addition, compared with the solution of judging anti-pinch by parameters such as motor current and speed, the film pressure sensor is more sensitive, and there is no need to consider the influence of motor operating parameter ripple, etc. The force required to trigger anti-pinch is lower, and it will not cause harm to humans or animals; and the detection signal is generated based on the piezoelectric effect, and there is no need to collect motor parameter signals and complex processing processes, which can effectively shorten the anti-pinch judgment time and improve the judgment accuracy. Moreover, compared with non-contact detection devices, the thin film pressure sensor can send out a detection signal when a foreign object is actually caught in the extrusion risk area of ​​the moving parts, thereby avoiding misjudgment and false triggering of the anti-clip function. Therefore, the embodiment of the utility model can improve the reliability of the anti-clip system of the electric sofa, enhance the anti-clip effect, and improve the safety of the electric sofa.

[0036] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present utility model, nor are they intended to limit the scope of the present utility model. Other features of the present utility model will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0038] Figure 1 It is a structural schematic diagram of an anti-pinch system for an electric sofa provided by an embodiment of the utility model;

[0039] Figure 2 This is a structural schematic diagram of an electric sofa provided by an embodiment of the utility model;

[0040] Figure 3 It is a structural schematic diagram of another electric sofa provided by an embodiment of the utility model;

[0041] Figure 4 It is a structural schematic diagram of another anti-pinch system for an electric sofa provided by an embodiment of the utility model;

[0042] Figure 5 It is a structural schematic diagram of a control module provided by an embodiment of the utility model;

[0043] Figure 6 It is a structural schematic diagram of an obstacle feedback module provided by an embodiment of the utility model;

[0044] Figure 7 It is a structural schematic diagram of a power module provided by an embodiment of the utility model;

[0045] Figure 8 It is a structural schematic diagram of a sensor detection module provided by an embodiment of the utility model;

[0046] Fig. 9 It is a structural schematic diagram of a hand controller signal detection module provided by an embodiment of the utility model;

[0047] Fig.10 It is a structural schematic diagram of a motor drive module and a current acquisition module provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0048] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0049] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0050] The embodiment of the utility model provides an anti-pinch system for an electric sofa. Figure 1 This is a schematic diagram of the structure of an anti-pinch system for an electric sofa provided by an embodiment of the utility model. Figure 1 The electric sofa anti-pinch system includes: a film pressure sensor 10, a driving module 20 and a control module 30.

[0051] The trigger mechanism of the film pressure sensor 10 is arranged in the squeezing risk area of ​​the moving parts in the electric sofa; the film pressure sensor 10 is used to output a detection signal when its trigger mechanism is squeezed. The driving module 20 is connected to the moving parts and is used to drive the moving parts to run. The control module 30 is respectively connected to the film pressure sensor 10 and the driving module 20, and the control module 30 is used to control the moving parts to stop running or run in reverse through the driving module 20 when receiving the detection signal.

[0052] Specifically, the electric sofa may include a backrest, a seat frame bracket and a footrest connected in sequence, and two armrests are respectively arranged on both sides of the seat frame bracket. At least some of the backrest, the seat frame bracket and the footrest may be configured as moving parts, and the moving parts may include a driving assembly, and the driving module 20 may include a driving motor, and the driving motor may control the movement of the moving parts by controlling the movement of the driving assembly. Taking the moving parts including the footrest as an example, the footrest may include a leg driving assembly, and the driving module 20 is connected to the leg driving assembly, for example, by controlling the extension and contraction of the leg driving assembly to control the expansion and retraction of the footrest.

[0053] During the operation, the moving parts will produce relative movement with the fixed parts, walls, floors and other fixed facilities in the electric sofa. When the moving parts move close to the fixed facilities, there may be a squeezing event of foreign objects being clamped. When a squeezing event occurs, it is necessary to activate the anti-pinch function of the electric sofa anti-pinch system to control the moving parts to stop running or run in reverse. The squeezing risk area of ​​the moving parts can be understood as the area where there is a risk of foreign objects being clamped in the moving parts. Still taking the moving parts including the footrest as an example, when the user unfolds and lifts the footrest, after lying on his back to rest, and controls the footrest to be retracted and lowered, due to the blind spot of his own vision, he will ignore whether there are children, pets or other foreign objects in the recycling path under the footrest. At this time, if the footrest is continuously recycled, the foreign objects under the footrest may be clamped, which may cause certain safety hazards, such as children or pets being clamped. In addition, since the foreign objects block the footrest from being recycled, the resistance of the drive module 20 is large, and a large current needs to be provided, which is easy to damage the drive module 20. Therefore, the back of the footrest can be used as the squeezing risk area of ​​the footrest. It can be understood that the front side of the footrest is the side that contacts the user's legs; the back side of the footrest is the side facing the ground when the footrest is unfolded, which is the other side opposite to the front side of the footrest.

[0054] The film pressure sensor 10 includes a trigger mechanism. The conductive material in the trigger mechanism is deformed, causing its resistance value to change. This change can be detected by measuring the resistance value and converted into a corresponding electrical signal, which is transmitted to the control module 30 as a detection signal. The trigger mechanism in the film pressure sensor 10 is set in the extrusion risk area of ​​the moving part, which can reliably determine whether the moving part is clamped by a foreign object during operation (i.e., whether an extrusion event occurs). Once a foreign object is clamped, the trigger mechanism will be deformed due to pressure and output a detection signal. When the control module 30 receives the detection signal, it can be known that the moving part is clamped by a foreign object during the current operation, so as to start the anti-clamping function in time and control the moving part to stop running or reverse running through the driving module 20. Exemplarily, when the control module 20 receives the detection signal, it can control the moving part to stop running first and then reverse running for a distance, so as to provide space to remove the foreign object and improve the safety of the electric sofa. Exemplarily, the trigger mechanism can be set to completely cover or partially cover the extrusion risk area according to the needs. The specific setting method can be determined according to the actual situation, such as setting by comprehensively considering the cost and detection sensitivity. The specific layout method is not limited here.

[0055] In the electric sofa anti-pinch system provided by the embodiment of the utility model, a film pressure sensor 10 is set as an anti-pinch detection device. When the control module 30 receives the detection signal output by the film pressure sensor 10, it determines that a foreign object is clamped and triggers the anti-pinch function. The driving module 20 controls the moving parts to stop moving or move in the opposite direction to realize the anti-pinch function. Compared with infrared sensors and capacitive sensors, the film pressure sensor 10 can be triggered to output a detection signal when it is clamped on a person or an animal, and it can also be triggered to output a detection signal when it is clamped on other non-living foreign objects, which can effectively improve the recognition range and safety of the electric sofa anti-pinch system. In addition, compared with the solution of judging anti-pinch by parameters such as motor current and speed, the film pressure sensor 10 is more sensitive, and there is no need to consider the influence of motor operating parameter ripple, etc. The force required to trigger anti-pinch is lower, and it will not cause harm to humans or animals; and the detection signal generated in this way does not require motor parameter signal acquisition and complex processing, which can effectively shorten the anti-pinch judgment time and improve the judgment accuracy. Moreover, compared with non-contact detection devices, the thin film pressure sensor 10 can send out a detection signal when a foreign object is actually caught in the extrusion risk area of ​​the moving part, thereby avoiding misjudgment and false triggering of the anti-clip function. Therefore, the embodiment of the utility model can improve the reliability of the anti-clip system of the electric sofa, enhance the anti-clip effect, and enhance the safety of the electric sofa.

[0056] On the basis of the above embodiments, optionally, the pressure sensing sensitivity of the thin film pressure sensor 10 can be set according to actual needs, for example, the lower limit of the sensitivity detection of the thin film pressure sensor 10 is 1N, preferably equal to or slightly less than 0.1N, to improve the sensitivity of anti-pinch detection. The pressure sensing sensitivity adjustment of the thin film pressure sensor 10 can be achieved by sensor selection and / or parameter setting.

[0057] On the basis of the above embodiments, optionally, the electric sofa includes at least one moving part, the driving module 20 includes at least one driving motor, and one driving motor is connected to at least one moving part, for example, connected to the driving assembly in the corresponding moving part; at least one film pressure sensor 10 is set corresponding to the extrusion risk area of ​​each moving part. The control module 30 is specifically used to control the moving part to stop running or reverse running through the driving motor connected to the moving part corresponding to the film pressure sensor 10 when receiving the detection signal output by any film pressure sensor 10. In other words, the moving parts in the extrusion risk area where one or more film pressure sensors 10 are located can be driven by the same driving motor, and the control module 30 can determine the target driving motor that needs to be regulated according to the setting position of the film pressure sensor 10 that outputs the detection signal, so as to provide an anti-pinch function for the moving parts where the extrusion event occurs, and realize accurate anti-pinch control.

[0058] On the basis of the above-mentioned embodiments, optionally, a trigger mechanism of a thin film pressure sensor 10 may be provided corresponding to one extrusion risk area. In one embodiment, optionally, the trigger mechanism may cover the extrusion risk area where it is located, so as to realize the detection of extrusion events at any position in the extrusion risk area and improve safety. In this case, the trigger mechanism may be in the form of a sheet, a mesh or a grid, and may be set according to actual needs. In another embodiment, optionally, the trigger mechanism may be provided corresponding to a position in the extrusion risk area where the probability of an extrusion event is higher, and other positions may not be provided to reduce the cost of the trigger mechanism. Exemplarily, the trigger mechanism may be provided around the edge of the extrusion risk area; in this case, the trigger mechanism may be in the form of a ring, a U-shape or a strip.

[0059] In the following, in combination with the structure of the electric sofa, the specific location of the squeeze risk area is exemplified, and the possible arrangement of the trigger mechanism is described accordingly, but it is not intended to limit the present invention.

[0060] Figure 2 This is a schematic diagram of the structure of an electric sofa provided by the embodiment of the utility model. Figure 2In one embodiment, optionally, the electric sofa includes a seat frame bracket 103, a backrest 102 and a footrest 101 respectively connected to the upper and lower ends of the seat frame bracket, and two armrests 104 respectively installed on the left and right sides of the seat frame bracket.

[0061] The moving parts of the electric sofa may include: a footrest 101; the squeezing risk area of ​​the footrest 101 is the back of the footrest 101, that is, the side facing the ground after unfolding. Correspondingly, the trigger mechanism 11 of the film pressure sensor 10 corresponding to the back of the footrest 101 may be in the form of a sheet or strip covering the entire back of the footrest 101, or as Figure 2 It is shown in a U shape and arranged along the lower side and left and right sides of the back of the footrest 101. In addition, the driving module 20 may include: a first driving motor 21, connected to the leg driving component (such as a leg extension bracket) in the footrest 101, and controlling the extension or contraction of the leg driving component to control the footrest 101 to be unfolded or retracted.

[0062] Then, when the trigger mechanism 11 on the back of the footrest 101 is compressed and deformed, a detection signal will be generated to the control module 30. The control module 30 can control the first drive motor 21 to change the working state, thereby controlling the footrest to stop running or reverse running through the leg drive component.

[0063] On the basis of the above embodiments, optionally, the moving parts in the electric sofa may also include: a backrest 102; the squeezing risk area of ​​the backrest 102 is the back side of the backrest; it is understandable that the front side of the backrest 102 is the side that contacts the user's back; the back side of the backrest 102 is the side facing the wall when folded, which is the other side opposite to the front side of the backrest 102. Correspondingly, the trigger mechanism 11 of the film pressure sensor 10 corresponding to the back side of the backrest 102 may be in the form of a sheet covering the entire back side of the backrest 102, or in the form of a ring, arranged along the edges of the back side of the backrest 102. Among them, the backrest 102 may include a backrest drive component (for example, a backrest extension bracket), and when the backrest drive component is extended, it can drive the backrest 102 to tilt backward within a preset angle range; when the backrest drive component is retracted, it can drive the backrest 102 to retract to a substantially upright state.

[0064] Exemplarily, the leg drive assembly and the backrest drive assembly can be connected via a linkage mechanism, and the first drive motor 21 can be connected to the backrest drive assembly via a linkage mechanism to synchronously drive the footrest 101 and the backrest 102 to unfold or retract. Then, when the trigger mechanism 11 on the back of the footrest 101 and / or the trigger mechanism 11 on the rear side of the backrest 102 is compressed and deformed to generate a detection signal to the control module 30, the control module 30 can control the first drive motor 21 to switch the working state, thereby controlling the footrest to stop running or reverse running through the leg drive assembly, and controlling the backrest 102 to stop running or reverse running through the backrest drive assembly.

[0065] Alternatively, the driving module 20 may further include: a third driving motor connected to the backrest driving assembly in the backrest 102, so as to realize independent driving of the backrest 102 and the footrest 101, thereby improving the diversity of the operation modes and the control flexibility of the electric sofa. Then, when the trigger mechanism 11 on the rear side of the backrest 102 is compressed and deformed to generate a detection signal to the control module 30, the control module 30 can control the third driving motor to switch the working state, thereby controlling the backrest 102 to stop running or reverse running through the backrest driving assembly.

[0066] Figure 2 The structure of a common functional sofa is given as an example, but it is not intended to limit the present invention. In other embodiments, Figure 3 As shown, optionally, the electric sofa can also be a chair for the elderly, by adding a lifting function to assist the elderly to stand.

[0067] Specifically, the moving parts in the electric sofa also include: a lifting part, and the lifting part includes: a lifting drive assembly 106 (for example, including a lifting bracket), a seat frame bracket 103 and two armrests 104. Among them, the seat frame bracket 103 is connected between the two armrests 104, and the seat frame bracket 103 is connected to the lifting drive assembly 106; the driving module drives the seat frame bracket 103 to move by controlling the lifting of the lifting drive assembly 106, and the armrests 104 run synchronously with the seat frame bracket 103. The extrusion risk area of ​​the lifting part includes the bottom surface of the seat frame bracket 103 and the bottom surfaces of the two armrests 104, wherein the bottom surface of the seat frame bracket 103 and the bottom surface of the armrests 104 can be located in the same plane or different planes, and can be configured according to actual needs. When the lifting drive assembly 106 is lifted, it can drive the seat frame bracket 103 to lift and tilt forward to assist the user to stand; when the lifting drive assembly 106 is lowered, it can drive the seat frame bracket 103 to lower and return to its original position or lean back to assist the user to adjust the sitting posture. Three film pressure sensors 10 may be provided corresponding to the lifting component, and the trigger mechanisms of the three film pressure sensors 10 may be provided at the bottom of the two armrests 104 and the bottom of the seat frame bracket 103, respectively. Alternatively, one film pressure sensor 10 may be provided corresponding to the lifting component, and its trigger mechanism may be in the form of a sheet covering the bottom surfaces of the two armrests 104 and the bottom surface of the seat frame bracket 103, or as Figure 3 It is shown in a U shape, arranged along the left side of the bottom surface of the left armrest, the rear side of the bottom surface of the seat frame bracket 103 and the right side of the right armrest.

[0068] Exemplarily, the leg driving assembly and the lifting driving assembly can be connected via a linkage mechanism, and the first driving motor 21 can be connected to the lifting driving assembly via a linkage mechanism to synchronously drive the footrest 101 and the seat frame bracket 103 to operate. Then, when the trigger mechanism 11 on the back of the footrest 101 and / or at least one trigger mechanism 11 corresponding to the lifting component is compressed and deformed to generate a detection signal to the control module 30, the control module 30 can control the first driving motor 21 to switch the working state, thereby controlling the footrest 101 to stop running or reverse running through the leg driving assembly, and controlling the seat frame bracket 103 and the armrest 104 to stop running or reverse running through the lifting driving assembly 106.

[0069] Alternatively, the driving module 20 may further include: a second driving motor 22 connected to the lifting driving assembly 106, so as to realize the independent driving of the lifting component and the footrest 101, thereby improving the diversity of the operation mode and the control flexibility of the electric sofa. Then, when at least one trigger mechanism 11 corresponding to the lifting component is compressed and deformed to generate a detection signal to the control module 30, the control module 30 can control the second driving motor 22 to switch the working state, thereby controlling the seat frame bracket 103 and the armrest 104 to stop running or reverse running through the lifting driving assembly 106.

[0070] Continue to see Figure 3 On the basis of the above embodiments, the electric sofa may further include: a base frame fixedly connected to the side of the lifting drive assembly 106 away from the seat frame bracket 103. The electric sofa anti-pinch system may further include: at least one infrared sensor (not shown); the infrared sensor is connected to the control module 30. The transmitting end and the receiving end of the infrared sensor are arranged opposite to each other on the base frame; the transmitting end and the receiving end of the infrared sensor are connected to the control module 30, for example. When there is no foreign matter on the base frame, there is no obstruction between the transmitting end and the receiving end of the infrared sensor, and the receiving end of the infrared sensor can receive the infrared signal from the transmitting end; when the receiving end of a certain infrared sensor cannot receive the infrared signal from the corresponding transmitting end, it indicates that there is a foreign matter obstruction between the transmitting end and the receiving end of the infrared sensor. Based on this, the control module 30 is also used to control all moving parts to stop running through the driving module 20 when the receiving end of at least one infrared sensor cannot receive the infrared signal, for example, control all driving motors in the driving module 20 to stop running. Exemplarily, the signal emitted by the infrared sensor can be set to have the highest priority level. Regardless of whether the film pressure sensor 10 emits a detection signal when the infrared sensor emits a signal indicating that it cannot be received, the control module 30 controls all drive motors to stop running to ensure the safety and reliability of the electric sofa.

[0071] Specifically, the chassis may include: two first support rods 107 arranged in parallel, and two second support rods 108 connected between the two first support rods 107 and arranged in parallel. The at least one infrared sensor may include: at least one first infrared sensor; the transmitting end and the receiving end of the first infrared sensor are respectively arranged opposite to each other on the two first support rods 107. And / or, at least one second infrared sensor; the transmitting end and the receiving end of the second infrared sensor are respectively arranged opposite to each other on the two second support rods 108. It is preferred to arrange a plurality of first infrared sensors arranged side by side and a plurality of second infrared sensors arranged side by side so as to comprehensively detect whether there are foreign objects on the chassis.

[0072] Figure 4 Schematic diagram of another anti-pinch system for electric sofas provided by the present utility model. Figure 4 On the basis of the above embodiments, optionally, the electric sofa anti-pinch system also includes: an obstruction feedback module 201, connected to the control module 30; the control module 30 is also used to control the obstruction feedback module 201 to give a foreign object prompt when the moving part 100 is controlled to stop running or reverse running through the driving module 20 (specifically, it can be through the driving motor 210); wherein the obstruction feedback module 201 includes: at least one of a buzzer, a vibrator and an indicator light, and can give a foreign object prompt by at least one of sound, light and vibration, so that the user can promptly obtain information about the foreign object being clamped and make corresponding responses, such as removing the clamped foreign object.

[0073] The implementation logic of the anti-pinch control function of different types of electric sofas can refer to the following settings:

[0074] 1. For the anti-pinch system of a single-motor functional sofa: a thin film pressure sensor can be equipped, and the trigger mechanism of the sensor is installed on the back of the sofa footrest. After the control module receives the detection signal from the thin film pressure sensor, the anti-pinch function is triggered, and the footrest is controlled by the first drive motor to stop running and run a short distance in the opposite direction. The basic structure of the functional sofa can be seen in Figure 2 .

[0075] 2. For the anti-pinch system of the dual-motor functional sofa: a thin film pressure sensor can be equipped for each moving part driven by the driving motor. Specifically, one driving motor is used to drive the footrest, and the trigger mechanism of one thin film pressure sensor is set on the back of the footrest. The detection signal of the sensor enables the control module to control the footrest to stop running and run a short distance in the opposite direction through the corresponding driving motor that pushes the footrest. Another driving motor is used to drive the backrest, and the trigger mechanism of another thin film pressure sensor is set on the back of the backrest. The detection signal of the sensor enables the control module to control the backrest to stop running and run a short distance in the opposite direction through the corresponding driving motor that pushes the backrest.

[0076] 3. For the anti-pinch system of a single-motor elderly chair: it can be equipped with a thin film pressure sensor, the trigger mechanism of which is installed on the back of the sofa footrest; or, it can be equipped with two thin film pressure sensors, the trigger mechanisms of which are respectively arranged on the back of the footrest and under the armrest, or respectively arranged on the back of the footrest and behind the backrest; or, it can be equipped with three thin film pressure sensors, the trigger mechanisms of which are respectively arranged on the back of the footrest, under the armrest and behind the backrest. When any thin film pressure sensor outputs a detection signal, the anti-pinch function is triggered, and the control module controls the moving parts to stop running and run a short distance in the opposite direction through the driving motor. Among them, the basic structure of the elderly chair can be seen in Figure 3 , compared to Figure 2 A lifting function has been added.

[0077] 4. For single-motor elderly chairs, based on the various situations in point 3, an infrared sensor can also be optionally installed. The infrared sensor is set on the base frame of the elderly chair. The signal sent by the infrared sensor has the highest priority. Regardless of whether the signal sent by the infrared sensor indicates that the receiving end cannot receive the infrared signal from the transmitting end, or whether the film pressure sensor sends a detection signal, the control module controls the drive motor to stop running, and at the same time can control the obstruction feedback module to issue an alarm.

[0078] 5. For dual-motor elderly chairs, a film pressure sensor can be provided for each moving part driven by each drive motor. For example, one drive motor is used to drive the footrest and the backrest, and a trigger mechanism of a film pressure sensor can be set on the back of the footrest, and another film pressure sensor can be set on the back of the backrest. When at least one of the two sensors sends a detection signal, the control module controls the footrest and the backrest to stop running and run a short distance in the opposite direction through the corresponding drive motor that pushes the footrest and the backrest. The other drive motor is used to drive the lifting drive assembly, and a trigger mechanism of a film pressure sensor can be set under the armrest and the seat frame bracket. The detection signal of the sensor enables the control module to control the lifting component to stop running and run a short distance in the opposite direction through the corresponding drive motor that drives the lifting drive assembly. Alternatively, the moving parts driven by the two drive motors can also be other combinations, as long as the two drive motors can drive all the moving parts accordingly, and the control module can adjust the control strategy of the anti-pinch function according to the corresponding relationship between the drive motor and the moving parts. In any of the above cases, an infrared sensor can also be optionally installed in the anti-pinch system and installed on the base frame of the elderly chair. The signal emitted by the infrared sensor has the highest priority. Regardless of whether the signal emitted by the infrared sensor indicates that the receiving end cannot receive the infrared signal from the transmitting end, or whether the film pressure sensor emits a detection signal, the control module controls all drive motors to stop running, and at the same time can control the obstruction feedback module to issue an alarm.

[0079] 6. The sensitivity of any of the above anti-pinch systems can be set to be higher, for example, it can sense resistance below 0.1N.

[0080] Continue to see Figure 4 On the basis of the above embodiments, the electric sofa anti-pinch system may further include: a power module 40, which is used to supply power to the entire electric sofa, at least to the electrical components in the entire anti-pinch system. Exemplarily, in addition to the film pressure sensor 10, the infrared sensor 50, the power module 40 and the drive module 20, other functional modules of the electric sofa anti-pinch system (such as the control module 30 and various circuit functional modules related to the control process) can be integrated into the anti-pinch control box 200. Figure 2 and Figure 3 The anti-pinch control box 200 and each driving motor 210 in the driving module 20 can be arranged in the accommodation space below the electric sofa seat frame bracket 103. The anti-pinch control box 200 can detect the control signal output by the hand controller 105 and the output signal of various sensors, and control each driving motor 210 to drive the entire electric sofa to operate. Exemplarily, the power module 40 can be connected to the control module 30 and various circuit function modules related to the control process.

[0081] Continue to see Figure 4On the basis of the above embodiments, optionally, in the electric sofa anti-pinch system, each circuit function module related to the control process may include: at least one of the following: the resistance feedback module 201, the sensor detection module 202, the motor drive module 203, the current acquisition module 204 and the hand controller signal detection module 205. Among them, the above circuit function modules are all connected to the control module 30, used to transmit signals to the control module 30 or be controlled by the control module 30 to execute corresponding commands. Specifically, the resistance feedback module 201 is used to provide foreign body prompts through at least one of sound, light and vibration under the control of the control module 30. There can be multiple sensor detection modules 202, which are arranged one by one with each sensor (including the film pressure sensor 10 and the infrared sensor 50), and are used to convert the signal output by the sensor into a signal recognizable by the control module 30 and transmit it to the control module 30. There can be at least one motor drive module 203, which is connected to the drive motor 210. The control module 30 controls the running state of the drive motor 210 through the motor drive module 203, thereby controlling the running state of the moving part 100 connected to the drive motor 210. For example, the motor drive module 203 can be set only for the drive motor whose connected moving parts may generate a squeeze event, so that the control module can control the running state of the drive motor through the motor drive module 203 to achieve the anti-pinch function; other drive motors can be configured as needed to be configured with the motor drive module 203 and controlled by the control module 30, or not configured with the motor drive module 203 and directly controlled by the hand controller 105. The current acquisition module 204 can be connected to the motor drive module 203 and set in a one-to-one correspondence with the motor drive module 203; the current acquisition module 204 can collect the driving current of the drive motor 210 through the motor drive module 203 and transmit it to the control module 30; the control module 30 can judge the working state of the drive motor 210 according to the driving current and perform corresponding control. The electric sofa may also include a hand controller (or wire controller) 105. The hand controller signal detection module 205 is connected between the hand controller 105 and the control module 30. The user operates the hand controller 105, such as clicking a function button in the hand controller 105, to output a control signal. The control signal is converted by the hand controller signal detection module 205 into a signal recognizable by the control module 30 and transmitted to the control module 30. The control module 30 controls the drive module 20 according to the control signal.

[0082] The working process of the electric sofa anti-pinch system can be: after the control module 30 detects the control signal of the hand controller 105, it drives the related drive motor 210 to perform the corresponding action, and collects the drive current of the drive motor 210 in real time. When the collected drive current exceeds the set threshold, it is determined that the drive motor 210 is abnormally blocked, and the drive motor 210 is controlled to stop running. The control module 30 also detects the output signals of the film pressure sensor 10 and the infrared sensor 50 in real time. When any sensor detection module 202 outputs a sensor signal indicating the occurrence of a squeezing event, the control module 30 controls the corresponding anti-pinch function, and at the same time controls the resistance feedback module 201 to issue a foreign body prompt to remind the user that something is pinched.

[0083] Among them, the sensor detection module 202 may be one or more, that is, one or more sensor interfaces may be provided in the anti-pinch control box 200. Based on the multiple sensor interfaces, it is possible to detect whether the film pressure sensors 10 at multiple positions output detection signals, thereby determining the position of the foreign matter, and controlling the drive motor 210 at the corresponding position to stop running and reversely run for a distance, thereby realizing the anti-pinch function.

[0084] The anti-pinch function principle of the anti-pinch system is described in the above-mentioned embodiments. The specific circuit structure of each functional module in the anti-pinch system of the electric sofa is exemplified below, but it is not intended to limit the present invention.

[0085] Figure 5 Schematic diagram of a control module provided by an embodiment of the utility model. Figure 5 In one embodiment, the control module 30 may optionally include: a main control chip U1 and peripheral circuits required for its operation. The main control chip U1 may be, for example, an MCU (Microcontroller Unit) or a single-chip microcomputer. The pins of the main control chip U1 may be numbered from the upper left to the lower left, and then from the lower right to the upper right, with the i-th pin being marked as Pi. The main control chip U1 may be, for example, GD32F130F6P6TR.

[0086] Specifically, the seventh pin P7 and the eighth pin P8 of the main control chip U1 are connected to the hand controller signal detection module 205, and are respectively used to receive key signals related to the control signals provided by different function keys of the hand controller 105, such as the first key signal MCU_KEY0 and the second key signal MCU_KEY1. The main control chip U1 can be connected to the resistance feedback module 201 through the tenth pin P10 to provide the alarm command signal Beep to the resistance feedback module 201. The eleventh pin P11 of the main control chip U1 can be connected to the current acquisition module 204, and is used to receive the drive current Signal_AD1 collected by the current acquisition module 204; illustratively, the control module can determine that the drive motor is abnormally blocked when the received drive current exceeds the set threshold, and control the drive motor to stop running, and / or, the control module can determine whether an extrusion event occurs according to the received drive current, thereby controlling the running state of the drive motor. The twelfth pin P12 and the thirteenth pin P13 of the main control chip U1 are both connected to the motor drive module 203, and provide the first drive signal M1_H and the second drive signal M1_L to the motor drive module 203 respectively to control the output state of the motor drive module 203. The fifteenth pin P15 of the main control chip U1 can be its ground pin, which is directly grounded. The sixteenth pin P16 of the main control chip U1 can be its power pin, which is connected to the second power signal V2, and the second power signal V2 is, for example, a 3.3V DC power signal. The eighteenth pin P18 of the main control chip U1 can be connected to the sensor detection module 202, and is used to receive the sensor signal MCU_Anti obtained by the sensor detection module 202 according to the output signal of the sensor.

[0087] Other pins of the main control chip U1 can be connected to peripheral circuits such as resistors and capacitors or connected to relevant functional signals or left floating according to functional requirements, which is not specifically limited here. For example, the interface J1 is the burning interface of the main control chip U1, and the middle two pins of the interface J1 can be connected to the nineteenth pin P19 and the twentieth pin P20 of the main control chip U1 respectively. The fourth pin P4 of the main control chip U1 can be its reset pin.

[0088] Figure 6 is a schematic diagram of a resistance feedback module provided by an embodiment of the utility model, see Figure 6 In one embodiment, optionally, the resistance feedback module 201 may include: a buzzer SG1, the resistance feedback module 201 may use sound to indicate a foreign object, and the buzzer SG1 may be packaged in the anti-pinch control box 200 or set at other locations of the electric sofa.

[0089] Specifically, the resistance feedback module 201 includes: a buzzer SG1 and a first transistor T1; one end of the buzzer SG1 is connected to the first power signal V1, the other end of the buzzer SG1 is connected to the first electrode of the first transistor T1, the control electrode of the first transistor T1 is connected to the control module, the alarm command signal Beep is connected, and the second electrode of the first transistor is grounded. When the alarm command signal Beep controls the first transistor T1 to turn on, the buzzer SG1 is powered and emits a buzzing sound to indicate a foreign object.

[0090] Exemplarily, the resistance feedback module 201 may also include a protection circuit composed of a resistor element. For example, one end of the buzzer SG1 may be connected to the first power signal V1 through a resistor R13, and the alarm command signal Beep may be provided to the control electrode of the first transistor T1 after voltage division by resistors R11 and R12 to ensure that the control electrode voltage of the first transistor T1 does not exceed its applicable range. Exemplarily, the first transistor may be a triode, a MOS tube or other controllable switch tube. The first power signal V1 may be a 29V DC power signal.

[0091] Figure 7 Schematic diagram of a power module provided by an embodiment of the utility model. Figure 7 In one embodiment, optionally, the power module 40 is used to convert the first power signal V1 into a second power signal V2 for output. The power module 40 includes: a power conversion chip U2, an input terminal VIN of the power conversion chip U2 is connected to the first power signal V1, a ground terminal GND2 of the power conversion chip U2 is grounded, and an output terminal VOUT of the power conversion chip U2 is connected to a control module and other functional modules that need to be powered by the second power signal V2. The power conversion chip U2 is, for example, a low voltage difference linear regulator. Exemplarily, in order to ensure the operation of the power conversion chip U2, a peripheral circuit composed of a fuse, a diode, an electrostatic protection diode, a capacitor and an inductor can also be set for the power conversion chip U2.

[0092] Figure 8 Schematic diagram of the structure of a sensor detection module provided by an embodiment of the utility model. Figure 8In one embodiment, optionally, the sensor detection module 202 includes: a first resistor R1, a second resistor R2, a third resistor R3, a first capacitor C1 and a first electrostatic protection diode ESD1; the first end of the first resistor R1 receives the output signal OUT_Anti of the sensor, for example, it can be connected to the output end of the thin film pressure sensor or the output end of the infrared sensor, the second end of the first resistor R1 is respectively connected to the first end of the second resistor R2, the first end of the third resistor R3 and the first end of the first electrostatic protection diode ESD1, the second end of the second resistor R2 is connected to the second power supply signal V2, the second end of the third resistor R3 is connected to the control module, and is used to transmit the sensor signal MCU_Anti to the control module, the second end of the first electrostatic protection diode ESD1 is grounded, the first end of the first capacitor C1 is connected to the second end of the third resistor R3, and the second end of the first capacitor C1 is grounded.

[0093] Among them, the detection signal output by the film pressure sensor can be a low potential, and the signal output by the infrared sensor for indicating that the signal from the transmitting end cannot be received can be a low potential. Then, when the output signal OUT_Anti of the sensor is a low potential, the sensor signal MCU_Anti output by the sensor detection module 202 is a low potential, and the control module can determine that an extrusion event occurs and activate the anti-pinch function when receiving the low potential sensor signal MCU_Anti. When the sensor does not output a signal, the sensor signal MCU_Anti output by the sensor detection module 202 is a high potential of the second power supply signal V2, and the control module can determine that there is no extrusion event when receiving the high potential sensor signal MCU_Anti.

[0094] Fig. 9 Schematic diagram of the structure of a hand controller signal detection module provided by the embodiment of the utility model. Fig. 9 The hand controller signal detection module includes: at least one key signal detection unit corresponding to at least one function key in the hand controller; the key signal detection unit includes: a fourth resistor, a fifth resistor, a sixth resistor, a second capacitor, and a second electrostatic protection diode. The first end of the fourth resistor is connected to the function key corresponding to the key signal detection unit, and is used to receive the control signal (for example, a high potential) formed when the user presses the function key. The second end of the fourth resistor is respectively connected to the first end of the fifth resistor, the first end of the sixth resistor, and the first end of the second electrostatic protection diode. The second end of the fifth resistor is connected to the control module, and is used to transmit the key signal related to the control signal to the control module. The second end of the sixth resistor is grounded, the second end of the second electrostatic protection diode is grounded, the first end of the second capacitor is connected to the second end of the fifth resistor, and the second end of the second capacitor is grounded.

[0095] Among them, when the function key is pressed, the control signal is high, the key signal detection unit can output a high-potential key signal, and the control module can determine that the corresponding function key is pressed when receiving the high-potential key signal. When the function key is not pressed, the key signal detection unit can output a low-potential (for example, the potential of the ground signal) key signal, and the control module can determine that the corresponding function key is not pressed when receiving the low-potential key signal.

[0096] Fig. 9 The key signal detection units corresponding to two function keys are given as an example. The first key signal detection unit corresponding to the first function key MA_1 includes: a first fourth resistor R41, a first fifth resistor R51, a first sixth resistor R61, a first second capacitor C21 and a first second electrostatic protection diode ESD21. When the first function key MA_1 is pressed, a first control signal KEY0 is formed, which is correspondingly converted into a first key signal MCU_KEY0 by the first key signal detection unit. The second key signal detection unit corresponding to the second function key MB_1 includes: a second fourth resistor R42, a second fifth resistor R52, a second sixth resistor R62, a second second capacitor C22 and a second second electrostatic protection diode ESD22. When the second function key MB_1 is pressed, a second control signal KEY1 is formed, which is correspondingly converted into a second key signal MCU_KEY1 by the second key signal detection unit. The first function key MA_1 is, for example, an expansion key for a footrest, and the second function key MB_1 is, for example, a retraction key for a footrest. By way of example, the hand controller may also include other function keys for configuring other functions or as function keys reserved for function expansion, such as Fig. 9 The third function button MC_1, the fourth function button MD_1, the fifth function button ME_1 and the sixth function button MF_1 are shown. Each function button can be configured with a key signal detection unit. The power terminal VS_1 of the hand controller can be connected to the first power signal V1, and the ground terminal GND_1 of the hand controller is directly grounded.

[0097] Fig.10It is a structural schematic diagram of a motor drive module and a current acquisition module provided by an embodiment of the utility model. In one embodiment, optionally, the motor drive module 203 includes: a motor drive chip U3, the input end of the motor drive chip U3 is connected to the control module, and the output end U3 of the motor drive chip is connected to the drive motor corresponding to the motor drive module. Exemplarily, the first input end IN1 and the second input end IN2 of the motor drive chip U3 are respectively connected to the first drive signal M1_H and the second drive signal M1_L, and the first output end OUT1 and the second output end OUT2 of the motor drive chip U3 respectively output the first control signal MA and the second control signal MB to control the operating state of the drive motor. The power supply end VCC of the motor drive chip U3 is connected to the first power supply signal V1, and the ground end GND3 is grounded. In order to ensure the stable operation of the motor drive chip U3, a peripheral protection circuit composed of capacitors and electrostatic protection diodes can also be set.

[0098] Continue to see Fig.10 On the basis of the above embodiments, optionally, the current acquisition module 204 may include: a seventh resistor R7, an eighth resistor R8 and a third capacitor C3; the first end of the seventh resistor R7 is connected to the ground terminal GND3 of the motor driver chip U3, the second end of the seventh resistor R7 is grounded, the first end of the eighth resistor R8 is connected to the ground terminal GND3 of the motor driver chip U3, the second end of the eighth resistor R8 is respectively connected to the first end of the third capacitor C3 and the control module, and the second end of the third capacitor C3 is grounded. The current acquisition module 204 performs current sampling through the resistor, and the second end of the eighth resistor R8 transmits the driving current Signal_AD1 collected by the current acquisition module 204 to the control module.

[0099] In summary, the embodiment of the utility model installs the film pressure sensor at a specific position of the electric sofa (the squeezing risk area of ​​the moving parts) to cover the area with the risk of pinching foreign objects, and then the control module detects the signal output by the film pressure sensor to determine whether the moving parts of the electric sofa are pinched by foreign objects during operation, thereby realizing the anti-pinch function. The electric sofa anti-pinch system provided by the embodiment of the utility model has the advantages of simple installation, sensitive triggering, wide detection range, and few usage restrictions.

[0100] The embodiment of the utility model further provides an electric sofa, comprising: a moving part and an anti-pinch system for the electric sofa as provided in any embodiment of the utility model, which has corresponding beneficial effects.

[0101] The above specific implementations do not constitute a limitation on the protection scope of the present utility model. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. An anti-pinch system for an electric sofa, characterized in that: include: A thin film pressure sensor, wherein a trigger mechanism of the thin film pressure sensor is arranged in an area of ​​risk of extrusion of moving parts in an electric sofa; The film pressure sensor is used to output a detection signal when the trigger mechanism is squeezed; A driving module, connected to the moving component, and used to drive the moving component to operate; The control module is connected to the film pressure sensor and the driving module respectively, and is used for controlling the moving part to stop running or reverse running through the driving module when receiving the detection signal.

2. The electric sofa anti-pinch system according to claim 1, characterized in that: The electric sofa comprises at least one moving part, the driving module comprises at least one driving motor, and one driving motor is connected to at least one moving part; at least one film pressure sensor is arranged correspondingly in the extrusion risk area of ​​each moving part; The control module is used to control the moving component to stop running or run in reverse through the driving motor connected to the moving component corresponding to the film pressure sensor when receiving the detection signal output by any of the film pressure sensors.

3. The electric sofa anti-pinch system according to claim 2, characterized in that: The moving parts include: a footrest; the extrusion risk area of ​​the footrest is the back side of the footrest; The driving module comprises: a first driving motor connected to a leg driving assembly in the footrest.

4. The electric sofa anti-pinch system according to claim 3, characterized in that: The moving component further includes: a lifting component, the lifting component includes: a lifting drive assembly, a seat frame bracket and two armrests, the seat frame bracket is connected between the two armrests, and the seat frame bracket is connected to the lifting drive assembly; the extrusion risk area of ​​the lifting component includes the bottom surface of the seat frame bracket and the bottom surfaces of the two armrests; The first driving motor is also connected to the lifting driving assembly; or the driving module further includes: a second driving motor connected to the lifting driving assembly.

5. The electric sofa anti-pinch system according to claim 3 or 4, characterized in that: The moving part further comprises: a backrest; the extrusion risk area of ​​the backrest is the rear side of the backrest; The first drive motor is also connected to a backrest drive assembly in the backrest; or, the drive module further includes: a third drive motor connected to the backrest drive assembly in the backrest.

6. The electric sofa anti-pinch system according to claim 4, characterized in that: The electric sofa further comprises: a bottom frame fixedly connected to a side of the lifting drive assembly away from the seat frame bracket; The electric sofa anti-pinch system also includes: At least one infrared sensor; the infrared sensor is connected to the control module, and the transmitting end and the receiving end of the infrared sensor are arranged opposite to each other on the base frame; wherein, when there is no foreign matter on the base frame, there is no obstruction between the transmitting end and the receiving end of the infrared sensor; the control module is also used to control all the moving parts to stop running through the driving module when the receiving end of at least one of the infrared sensors cannot receive an infrared signal.

7. The electric sofa anti-pinch system according to claim 6, characterized in that: The base frame comprises: two first support rods arranged in parallel, and two second support rods connected between the two first support rods and arranged in parallel; The at least one infrared sensor comprises: At least one first infrared sensor; a transmitting end and a receiving end of the first infrared sensor are respectively arranged opposite to each other on the two first support rods; And / or, at least one second infrared sensor; a transmitting end and a receiving end of the second infrared sensor are respectively arranged opposite to each other on the two second support rods.

8. The electric sofa anti-pinch system according to claim 1 or 6, characterized in that: Also includes: An obstruction feedback module is connected to the control module; the control module is also used to control the obstruction feedback module to give a foreign object prompt when the moving part is controlled to stop running or reverse running through the driving module; wherein the obstruction feedback module includes: at least one of a buzzer, a vibrator and an indicator light.

9. The electric sofa anti-pinch system according to claim 8, characterized in that: The resistance feedback module includes: a buzzer and a first transistor; one end of the buzzer is connected to a first power signal, the other end of the buzzer is connected to a first electrode of the first transistor, a control electrode of the first transistor is connected to the control module, and a second electrode of the first transistor is grounded.

10. The electric sofa anti-pinch system according to claim 1 or 6, characterized in that: The electric sofa anti-pinch system further includes: a power module; the power module includes: a power conversion chip, the input end of the power conversion chip is connected to the first power signal, the ground end of the power conversion chip is grounded, and the output end of the power conversion chip is connected to the control module; And / or, the electric sofa anti-pinch system also includes: a sensor detection module; the sensor detection module includes: a first resistor, a second resistor, a third resistor, a first capacitor and a first electrostatic protection diode; the first end of the first resistor is connected to the output end of the film pressure sensor or the output end of the infrared sensor, the second end of the first resistor is respectively connected to the first end of the second resistor, the first end of the third resistor and the first end of the first electrostatic protection diode, the second end of the second resistor is connected to the second power supply signal, the second end of the third resistor is connected to the control module, the second end of the first electrostatic protection diode is grounded, the first end of the first capacitor is connected to the second end of the third resistor, and the second end of the first capacitor is grounded; And / or, the electric sofa also includes: a hand controller; the electric sofa anti-pinch system also includes: a hand controller signal detection module; the hand controller signal detection module includes: at least one key signal detection unit corresponding to at least one function key in the hand controller; the key signal detection unit includes: a fourth resistor, a fifth resistor, a sixth resistor, a second capacitor and a second electrostatic protection diode; the first end of the fourth resistor is connected to the function key corresponding to the key signal detection unit, the second end of the fourth resistor is respectively connected to the first end of the fifth resistor, the first end of the sixth resistor and the first end of the second electrostatic protection diode, the second end of the fifth resistor is connected to the control module, the second end of the sixth resistor is grounded, the second end of the second electrostatic protection diode is grounded, the first end of the second capacitor is connected to the second end of the fifth resistor, and the second end of the second capacitor is grounded.

11. The electric sofa anti-pinch system according to claim 2, characterized in that: Also includes: A motor drive module corresponding one to one with the drive motors; The motor driving module comprises: a motor driving chip, an input end of the motor driving chip is connected to the control module, and an output end of the motor driving chip is connected to a driving motor corresponding to the motor driving module.

12. The electric sofa anti-pinch system according to claim 11, characterized in that: Also includes: A current acquisition module corresponding one to one to the motor drive module; The current acquisition module includes: a seventh resistor, an eighth resistor and a third capacitor; The first end of the seventh resistor is connected to the ground terminal of the motor driver chip, the second end of the seventh resistor is grounded, the first end of the eighth resistor is connected to the ground terminal of the motor driver chip, the second end of the eighth resistor is respectively connected to the first end of the third capacitor and the control module, and the second end of the third capacitor is grounded.

13. The electric sofa anti-pinch system according to claim 2, characterized in that: A trigger mechanism of the film pressure sensor is correspondingly arranged in one of the extrusion risk areas; Wherein, the trigger mechanism covers the extrusion risk area, and the trigger mechanism is in a sheet, mesh or grid shape; or, the trigger mechanism is arranged around the edge of the extrusion risk area, and the trigger mechanism is in a ring, U-shape or strip shape.

14. An electric sofa, characterized in that: include: A moving part and an anti-pinch system for an electric sofa as claimed in any one of claims 1 to 13.

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