Anti-pinch detection and protection method for electric sofa

Abstract

The invention discloses an electric sofa anti-pinch detection and protection method which comprises the following steps: taking the tail end of an electric sofa telescopic iron stand on an electric sofa iron stand as a sensing part to receive contact from a living body; the tail end of the electric sofa telescopic iron stand is connected with the multi-path capacitive sensing plate through a lead, and a received contact signal is detected, converted and fed back through the multi-path capacitive sensing plate; when the main control circuit board receives a retraction instruction from the remote controller, the main control circuit board needs to judge the position of the push rod motor in real time according to the current state when the push rod motor works; in the process that the main control circuit board drives the telescopic iron stand to retract, when a living body touches the tail end of the telescopic iron stand of the electric sofa, sensing chips of the multi-channel capacitive sensing board provide collected feedback information to the main control circuit board, and the main control circuit board executes corresponding stopping and unfolding actions according to the feedback information. And anti-pinch detection and protection in the retraction process of the electric sofa are realized.

Description

Technical Field

[0001] The invention relates to the field of anti-pinch protection for electric sofas, and in particular to an anti-pinch detection and protection method for electric sofas. Background Art

[0002] Electric sofas are becoming more and more popular as high-end leisure furniture as the material level improves. Different from the fixed angle of traditional sofas, electric sofas provide electric adjustment functions for leg rests and backrest angles, providing users with a comfortable leisure experience. However, since electric sofas perform various mechanical movements during use, there are also certain safety hazards. For example, when a person lies on an unfolded sofa and no one else around notices the electric sofa, some pets, infants or other users' hands and feet enter under the sofa leg rest. If the user controls the sofa to retract at this time, there may be a risk of pinching the life. If the life under the electric sofa cannot be detected in time and the mechanical movement of retraction cannot be stopped, the consequences are unimaginable.

[0003] In the prior art, patent CN214678352U uses a structural method, but this method increases the complexity of the structure, thereby increasing the complexity of the production and assembly process and increasing the production cost;

[0004] Patents CN109240182, CN109343420, CN110652132, and CN110664160A perform detection by sampling current. The current detection method has low sensitivity and is affected by many factors such as the iron frame.

[0005] Patents CN111317292A, CN209186100U, and CN209186114U use infrared sensors for detection, but the infrared detection scheme has a high false detection rate. The characteristics of infrared sensing technology determine that it has a certain false detection rate, and infrared sensing cannot distinguish whether the object is a sofa accessory or an intruding object, and cannot determine whether the intruding object is clamped; it is greatly affected by the environment. The basis of infrared sensing technology is the infrared sensor. This sensor is greatly affected by light, and its own aging is also affected, so long-term stability cannot be guaranteed; the original electric sofa is greatly modified and the installation is complicated. The infrared sensing solution requires the installation and debugging of the sensor probe, which has major changes to the sofa structure, and significantly increases the difficulty of production debugging.

[0006] Patents CN112741443A and CN221204668U use millimeter wave radar, which is costly.

[0007] Based on this, the present invention proposes an anti-pinch detection and protection method for an electric sofa. Summary of the invention

[0008] In order to overcome the defects in the above-mentioned prior art, the present invention provides an anti-pinch detection and protection method for an electric sofa, by adopting a sensing chip of a multi-channel capacitor sensing board as a detection chip and connecting it to the end of the electric sofa telescopic iron frame on the electric sofa iron frame through a wire, and using the end of the electric sofa telescopic iron frame as a sensing component; during the retraction process of the electric sofa controlled by a remote control, when a living body touches the end of the telescopic iron frame of the electric sofa, the capacitance of the end of the telescopic iron frame of the electric sofa changes, and the sensing chip of the multi-channel capacitor sensing board feeds back the collected capacitance change information to a main control circuit board, and the main control circuit board makes a judgment in combination with the current motion state of the electric sofa, thereby achieving the purpose of anti-pinch protection for the contraction of the electric sofa.

[0009] Technical Solution

[0010] An anti-pinch detection and protection method for an electric sofa comprises the following steps:

[0011] Step 1: Use the end of the electric sofa telescopic iron frame on the electric sofa iron frame as the sensing component of the space capacitor to receive contact from living organisms;

[0012] Step 2: The end of the telescopic iron frame of the electric sofa is connected to the multi-channel capacitor sensing board through a wire, and the received contact signal is collected, converted and fed back through the multi-channel capacitor sensing board;

[0013] Step 3: When the main control circuit board receives the user command from the remote control, it collects the detection feedback information from the multi-channel capacitor sensor board and controls the electric sofa push rod motor to move;

[0014] Step 4: When controlling the movement of the electric sofa push rod motor, the current of the electric sofa push rod motor is detected in real time to determine whether it can be retracted to the bottom;

[0015] Step 5: If the electric sofa push rod motor does not retract to the bottom during the retraction process in step 4, and the end of the electric sofa telescopic iron frame connected to the multi-channel capacitor sensing board in step 2 touches a living body, the main control circuit board will sound an alarm and perform corresponding anti-pinch protection actions.

[0016] Furthermore, the end of the telescopic iron frame of the electric sofa is used as a sensing collection component to sense whether a living being touches the telescopic component of the electric sofa.

[0017] Furthermore, the multi-channel capacitive sensing board using the capacitive touch chip as the main chip collects capacitance change information on the end of the telescopic iron frame of the electric sofa, and analyzes and determines in real time whether a living being touches the end of the telescopic iron frame of the electric sofa.

[0018] Furthermore, the main control circuit board receives the user's remote control command, drives the electric sofa to extend and retract, and determines whether the electric sofa push rod motor is fully retracted through current sampling and analysis; the main control circuit board also receives information from the multi-channel capacitor sensing board. If the multi-channel capacitor sensing board detects that the end 1 of the telescopic iron frame of the electric sofa touches a living body during the retraction process, the main control circuit board stops driving the electric sofa push rod motor to retract and unfolds it in the opposite direction, thereby preventing the living body from being clamped.

[0019] Furthermore, the electric sofa includes a matching remote controller, which is a command input method for the electric sofa. The user controls the extension and contraction state of the electric sofa through the remote controller.

[0020] Furthermore, the main control electric board is an actuator of the electric sofa, receiving control instructions to be controlled and feedback information from the multi-channel capacitive sensing board.

[0021] Beneficial Effects

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The sensing chip of the multi-channel capacitance sensing board is used as a detection chip and connected to the end of the telescopic iron frame of the electric sofa through a wire. The end of the telescopic iron frame of the electric sofa is used as a sensing sensing component. When a living body touches the end of the telescopic iron frame of the electric sofa, the spatial sensing capacitance at the end of the telescopic iron frame of the electric sofa will change. The sensing chip of the multi-channel capacitance sensing board collects the change of the spatial sensing capacitance at the end of the telescopic iron frame of the electric sofa and provides the collected feedback information to the main control circuit board. The main control circuit board analyzes the current movement state of the electric sofa, the retracted state or the retracted state to the bottom. When the electric sofa is in the retracted state and has not retracted to the bottom, it immediately stops retracting and unfolds in the opposite direction, thereby achieving the purpose of anti-pinch protection of the electric sofa after retraction.

[0024] The invention has high sensing sensitivity, strong anti-interference ability and low cost. The end of the telescopic iron frame of the electric sofa is the hidden danger of the electric sofa and is the main component for preventing hidden dangers of pinching. The end of the telescopic iron frame of the electric sofa is used as a carrier of capacitive induction, and the existing materials of the electric sofa are used for induction detection, which does not increase the hardware cost and can effectively detect anti-pinch information. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of an anti-pinch detection and protection method for an electric sofa of the present invention;

[0026] Figure 2 It is a detection flow chart of the present invention.

[0027] Reference Numbers

[0028] The end of the electric sofa telescopic iron frame 1, the movable sofa push rod motor 2, and the electric sofa iron frame 3. DETAILED DESCRIPTION

[0029] In order to better illustrate the content of the present invention, the following is a detailed description with reference to the accompanying drawings and implementation examples:

[0030] have Figure 1-2 As shown, the present invention discloses an anti-pinch detection and protection method for an electric sofa, comprising the following steps:

[0031] Step 1: Use the electric sofa telescopic iron frame end 1 on the electric sofa iron frame 3 as a sensing component of the space capacitor to receive contact from a living body;

[0032] Step 2: The end 1 of the telescopic iron frame of the electric sofa is connected to the multi-channel capacitance sensing plate through a wire, and the received spatial capacitance change information is collected, converted and fed back through the multi-channel capacitance sensing plate;

[0033] Step 3: When the main control circuit board receives the user command from the remote control, it collects the detection feedback information from the multi-channel capacitor sensing board and controls the electric sofa push rod motor 2 to move;

[0034] Step 4: When controlling the movement of the electric sofa push rod motor 2, the current of the electric sofa push rod motor 2 is detected in real time to determine whether it can be retracted to the bottom. When it is retracted to the bottom, the power supply of the capacitor sensing board should be turned off to prevent false sensing when it is retracted to the bottom.

[0035] Step 5: If the electric sofa push rod motor 2 does not retract to the bottom during the retraction process in step 4, and the end 1 of the electric sofa telescopic iron frame connected to the multi-channel capacitor sensing board in step 2 touches a living body, the main control circuit board will sound an alarm and perform corresponding anti-pinch protection actions.

[0036] Furthermore, the end 1 of the telescopic iron frame of the electric sofa is used as a sensing collection component to sense whether a living being touches the telescopic component of the electric sofa.

[0037] Furthermore, the multi-channel capacitive sensing board using the capacitive touch chip as the main chip collects capacitance change information on the end 1 of the telescopic iron frame of the electric sofa, and analyzes and determines in real time whether a living being touches the end 1 of the telescopic iron frame of the electric sofa.

[0038] Furthermore, the main control circuit board receives the user's remote control command, drives the electric sofa to extend and retract, and determines whether the electric sofa push rod motor 2 is fully retracted through current sampling and analysis; the main control circuit board also receives information from the multi-channel capacitor sensing board. If the multi-channel capacitor sensing board detects that the end 1 of the telescopic iron frame of the electric sofa touches a living body during the retraction process, the main control circuit board stops driving the electric sofa push rod motor 2 to retract and expands it in the opposite direction, thereby preventing the living body from being clamped.

[0039] Furthermore, the electric sofa includes a matching remote controller, which is a command input method for the electric sofa. The user controls the extension and contraction state of the electric sofa through the remote controller.

[0040] Furthermore, the main control electric board is an actuator of the electric sofa, receiving control instructions to be controlled and feedback information from the multi-channel capacitive sensing board.

[0041] Specifically, a living body has capacitance in space and can be sensed by a metal object; a capacitive touch chip is used as a main chip element of a multi-channel capacitive sensing board, and by analyzing the capacitance change information on the sensing component, the state information of the living body on the sensing component can be analyzed;

[0042] A capacitive touch chip of a multi-channel capacitive sensing board is used as a detection chip and connected to the end 1 of the electric sofa telescopic iron frame on the electric sofa iron frame 3 through a wire. The end 1 of the electric sofa telescopic iron frame is used as a sensing component. When a living body touches the end 1 of the electric sofa telescopic iron frame, the spatial capacitance on the end 1 of the electric sofa telescopic iron frame will change significantly. The capacitive touch chip of the multi-channel capacitive sensing board provides the collected feedback information to the main control circuit board. The main control circuit board analyzes the current movement state of the electric sofa. When the electric sofa is in a contracted state, it immediately stops contracting and unfolds in the opposite direction, thereby achieving the purpose of anti-pinch protection of the electric sofa when it is contracted.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the technical solutions of the present invention have been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An anti-pinch detection and protection method for an electric sofa, characterized in that: The steps include: Step 1: Using the electric sofa telescopic iron frame end (1) on the electric sofa iron frame (3) as a sensing component of the space capacitor to receive contact from a living body; Step 2: The end (1) of the electric sofa telescopic iron frame is connected to the multi-channel capacitance sensing plate through a wire, and the received spatial capacitance change information is collected, converted and fed back through the multi-channel capacitance sensing plate; Step 3: When the main control circuit board receives the user command from the remote control, it collects the detection feedback information from the multi-channel capacitor sensing board and controls the electric sofa push rod motor (2) to move; Step 4: When controlling the movement of the electric sofa push rod motor (2), the current of the electric sofa push rod motor (2) is detected in real time to determine whether it has been fully retracted. When it has been fully retracted, the power supply of the capacitive sensing board is turned off to prevent false sensing from occurring when it has been fully retracted. Step 5: If the electric sofa push rod motor (2) does not retract to the bottom during the retraction process in step 4, and the end (1) of the electric sofa telescopic iron frame connected to the multi-channel capacitor sensing board in step 2 touches a living body, the main control circuit board will sound an alarm and perform corresponding anti-pinch protection actions.

2. The anti-pinch detection and protection method for an electric sofa according to claim 1, characterized in that: The electric sofa includes a matching remote controller, which is a command input method for the electric sofa. The user controls the extension and contraction state of the electric sofa through the remote controller.

3. The anti-pinch detection and protection method for an electric sofa according to claim 1, characterized in that: The end (1) of the telescopic iron frame of the electric sofa is used as a sensing collection component to sense whether a living being touches the telescopic component of the electric sofa.

4. The anti-pinch detection and protection method for an electric sofa according to claim 1, characterized in that: The multi-channel capacitive sensing board using a capacitive touch chip as the main chip collects capacitance change information on the end (1) of the telescopic iron frame of the electric sofa, and performs real-time analysis and judgment on whether a living being touches the end (1) of the telescopic iron frame of the electric sofa.

5. The anti-pinch detection and protection method for an electric sofa according to claim 1, characterized in that: The main control circuit board receives a remote control command from a user, drives the electric sofa to extend and retract, and determines whether the electric sofa push rod motor (2) has been fully retracted through current sampling and analysis; the main control circuit board simultaneously receives information from a multi-channel capacitor sensing board, and if the multi-channel capacitor sensing board detects that the end 1 of the electric sofa telescopic iron frame touches a living body during the retraction process, the main control circuit board stops driving the electric sofa push rod motor (2) to retract, and extends in the opposite direction, thereby achieving the purpose of preventing the living body from being clamped.

Images