Electric-motor control system, pinch protection apparatus and pinch protection system for movable furniture unit, and furniture unit

Abstract

The present application relates to an electric-motor control system for a movable furniture unit. The electric-motor control system comprises an electric motor, a power source, a manually controlled switch and a pinch protection execution switch, wherein the pinch protection execution switch may be switched between a first execution position and a second execution position; at the first execution position, the electric motor is connected to the manually controlled switch by means of the pinch protection execution switch, and the polarity of a voltage that the power source applies to the electric motor is changed by means of switching the manually controlled switch; and at the second execution position, the electric motor is connected to the power source by means of the pinch protection execution switch, and the electric motor rotates and drives the furniture unit to extend so as to realize pinch protection. The present invention further relates to a pinch protection apparatus and a pinch protection system for a movable furniture unit, and the movable furniture unit.

Description

Motor control system, anti-pinch device, anti-pinch system and furniture unit for a movable furniture unit

[0001] This application claims priority to Chinese Patent Application Nos. 202410584861.2, 202421021874.0, 202410584869.9, and 202421022862.X, filed on May 11, 2024, the contents of which are hereby incorporated by reference in their entirety as part of the present application. TECHNICAL FIELD

[0002] The present application relates to a motor control system, an anti-pinch device, an anti-pinch system and a furniture unit for a movable furniture unit. BACKGROUND

[0003] With the improvement of living standards, people's demand for furniture products is becoming more and more sophisticated. Not only do they want furniture products to have more and more diverse functions, but they also have increasingly stringent requirements for their safety performance. For example, in electric sofas, multifunctional electric sofas often have multiple movable units, such as movable leg units, backrest units, and even movable armrest units, to meet users' diverse needs for seating posture.

[0004] The movement of each movable unit is facilitated by a motor to enable the electric sofa to change between at least two of the sitting, TV, and lying positions. However, in the "extended" position of the TV or lying position, the movable unit is deployed away from the sofa base, for example, the space between the footboard of the leg unit and the sofa base is exposed to the outside, and foreign matter may enter this space from the outside and prevent the electric sofa from resetting. More seriously, if a living being, such as a pet or even a child, enters this space, it may be trapped during the sofa resetting movement, resulting in injury or death of the pet or person.

[0005] To avoid such hazards, various measures have been taken to prevent them. In some existing designs, a guard plate is installed on the movable part to close the passage from the outside to the inside at the movable part, preventing foreign matter or living beings from entering the area where pinching may occur. However, in such designs, the installed guard plate not only hinders the freedom of movement of the furniture product, increases the structural space required for its installation, but also adversely affects the appearance; in some existing designs, a capacitive or infrared sensing device is used to detect foreign matter or living beings entering the pinching risk area. However, in such designs, the capacitive or infrared sensing device not only has large measurement errors and unstable working conditions, but also has complex connection relationships and high energy consumption.

[0006] In addition, the current anti-pinch solution on the market is basically centered on a control module, a hand controller key signal and an anti-pinch sensing signal are connected to the control module, and then the control module controls the main motor of the functional sofa to act through a drive module to realize normal extension and contraction or anti-pinch control of the functional sofa. Under this architecture, once the control module fails, not only the anti-pinch function of the sofa cannot be realized, but also the basic use function of the sofa will be lost. SUMMARY

[0007] Therefore, the technical problem to be solved by the present disclosure is to provide a motor control system for a movable furniture unit and a furniture unit, which can simply and reliably, safely, stably and with low power consumption realize the anti-pinch function of the furniture unit and the cooperation of the anti-pinch function and the basic use function.

[0008] To solve the technical problem, the present disclosure provides a motor control system for a movable furniture unit, comprising: a motor, a power supply, a hand control switch and an anti-pinch execution switch; wherein the anti-pinch execution switch can be switched between a first execution position and a second execution position; in the first execution position, the motor is connected to the hand control switch through the anti-pinch execution switch, and the voltage polarity applied to the motor by the power supply is changed by switching of the hand control switch; and in the second execution position, the motor is connected to the power supply through the anti-pinch execution switch, the motor rotates and drives the furniture unit to extend to realize anti-pinch.

[0009] In an embodiment according to the present disclosure, the motor control system further comprises: an anti-pinch sensor, an anti-pinch signal receiver and a control unit, wherein in the case that the anti-pinch sensor is triggered, the anti-pinch sensor sends a trigger signal to the anti-pinch signal receiver, the anti-pinch signal receiver receives the trigger signal, the anti-pinch signal receiver generates an anti-pinch signal according to the trigger signal and transmits it to the control unit, the control unit sends an execution signal to the anti-pinch execution switch according to the anti-pinch signal, and the anti-pinch execution switch switches from the first execution position to the second execution position according to the execution signal.

[0010] In an embodiment according to the present disclosure, the anti-pinch sensor comprises: a trigger piece, a trigger switch, a signal emitter and a sensor power supply, wherein the trigger switch, the signal emitter and the sensor power supply are connected in series and constitute a loop, wherein in the case that the trigger piece is not triggered, the trigger switch is off, and the loop is open; in the case that the trigger piece is triggered, the trigger switch is on, the loop is powered on and the signal emitter emits the trigger signal.

[0011] In embodiments according to the present disclosure, the motor control system further comprises a prompting unit, the control unit sends a prompting trigger signal to the prompting unit according to the anti-pinch signal, and the prompting unit sends a prompt according to the prompting trigger signal.

[0012] In embodiments according to the present disclosure, the anti-pinch signal receiver has a pairing unit, which is used to establish a wireless communication connection between one anti-pinch signal receiver and one or more anti-pinch sensors.

[0013] In embodiments according to the present disclosure, the hand control switch comprises a first switch element and a second switch element, the hand control switch is switchable between a first, a second and a third hand control position, the anti-pinch execution switch comprises a third switch element and a fourth switch element, and the first, second, third and fourth switch elements are configured as single-pole double-throw switches, and wherein, in the second execution position, the motor is connected to a first pole of the power supply via the third switch element and to a second pole of the power supply via the fourth switch element; in the first execution position, the motor is connected to a first end of the first switch element via the third switch element and to a first end of the second switch element via the fourth switch element, and in the first hand control position, a second end of the first switch element and a second end of the second switch element are connected to the second pole of the power supply, respectively, in the second hand control position, the second end of the first switch element is connected to the first pole of the power supply, and the second end of the second switch element is connected to the second pole of the power supply, and in the third hand control position, the second end of the first switch element is connected to the second pole of the power supply, and the second end of the second switch element is connected to the first pole of the power supply.

[0014] In embodiments according to the present disclosure, the first switch element and the second switch element are configured as normally open and normally closed micro switches, and the third switch element and the fourth switch element are configured as normally open and normally closed relays, wherein the first hand control position corresponds to the normally closed position of the first switch element and the second switch element, and the first execution position corresponds to the normally closed position of the third switch element and the fourth switch element.

[0015] In embodiments according to the present disclosure, in the second execution position, the motor rotates forward; in the first execution position, in the second hand control position, the motor rotates forward, and in the third hand control position, the motor rotates backward.

[0016] In embodiments according to the present disclosure, the motor control system further comprises a limit switch connected between the motor and the anti-pinch execution switch, the limit switch comprising a fifth switch element, a sixth switch element, a first diode and a second diode, wherein the fifth switch element and the sixth switch element are connected in series, the first diode is connected in parallel with the fifth switch element, the second diode is connected in parallel with the sixth switch element, and the first diode and the second diode have opposite conduction directions.

[0017] In embodiments according to the present disclosure, the fifth switch element and the sixth switch element are configured as normally open and normally closed micro switches, and only when the first limit position of the furniture unit is reached, the fifth switch element is opened, and only when the second limit position of the furniture unit is reached, the sixth switch element is opened.

[0018] The present disclosure also provides a furniture unit, comprising: the motor control system according to the above-mentioned embodiments of the present disclosure, a sofa body and a footrest, wherein the forward rotation of the motor causes the footrest to be lifted, and the reverse rotation of the motor causes the footrest to be stowed.

[0019] To solve the technical problem, an anti-pinch device is provided, comprising: a fixed housing which constitutes a housing cavity; a movable top cover which comprises an action section, the movable top cover being able to be displaced relative to the fixed housing by an action force applied on the action section; and at least one anti-pinch sensor which is arranged between the fixed housing and the movable top cover and is configured to detect the displacement of the movable top cover relative to the fixed housing, wherein the anti-pinch sensor comprises a base body which is fixedly arranged in the housing cavity and a trigger which is displaceable relative to the base body, the displacement of the movable top cover relative to the fixed housing causes the displacement of the trigger relative to the base body, and wherein the action section comprises an inner surface facing the anti-pinch sensor and an outer surface facing the outside of the anti-pinch device, wherein the outer surface is at least partially arc-shaped and convexly configured.

[0020] According to the present disclosure, when an external force acts on the action section of the movable top cover, it causes the displacement of the movable top cover relative to the fixed housing, and the displacement of the movable top cover relative to the fixed housing in turn causes the displacement of the trigger of the anti-pinch sensor relative to the base body thereof. Thus, the response of the anti-pinch sensor to the action of the external force is achieved in a mechanical manner, ensuring sufficient sensitivity and working reliability of the detection function.

[0021] Furthermore, the outer surface of the movable top cover for receiving the external force has an arc-shaped convex configuration at least in sections. In comparison with a purely planar outer surface, this design not only enables sensitive detection of an external force acting parallel to the displacement direction of the movable top cover, but also enables equally sensitive detection of an external force acting at an angle to the displacement direction of the movable top cover, or even omnidirectionally. This further improves the detection sensitivity and the reliability of the anti-pinch function.

[0022] In a preferred embodiment, the outer surface is configured mirror-symmetrically.

[0023] In a preferred embodiment, the stationary housing and the movable top cover extend parallel to one another in the longitudinal direction, wherein an end cap is arranged at the end of the stationary housing. As a component for receiving the external force, the movable top cover enables transmission of the external force to at least one anti-pinch sensor in the housing cavity over a maximum range, improving the reliability and sensitivity of the anti-pinch function. Furthermore, the end cap is arranged at the end of the stationary housing, adjacent to the movable top cover, such that directional guidance of the movable top cover is achieved when the movable top cover is displaced relative to the stationary housing.

[0024] In a preferred embodiment, the trigger piece comprises a trigger piece top end, which is in contact with the inner surface of the action section.

[0025] Preferably, the upper end of the trigger piece is in contact with the inner surface of the action section, such that displacement of the movable top cover relative to the stationary housing can be sensitively converted into a position of the trigger piece relative to the base body.

[0026] In a preferred embodiment, the trigger piece top end comprises a convex curved surface. Particularly preferably, the trigger piece top end is configured dome-shaped.

[0027] In a preferred embodiment, the inner surface comprises a receiving groove, in which the trigger piece top end is received.

[0028] In a preferred embodiment, the trigger piece top end is received in the receiving groove at least in sections with a spacing.

[0029] In this design, the apex of the upper end is in contact with the receiving groove, whereas in the circumferential region of the upper end, a spacing from the receiving groove can be provided. On the one hand, a force exerted by the movable top cover on the upper end of the trigger piece, whether parallel to the displacement direction of the trigger piece relative to the base body or not, reliably leads to the normal operation of the trigger piece, improving the reliability and sensitivity of the anti-pinch function. On the other hand, a gap between the circumferential region of the upper end and the receiving groove is left, avoiding false triggering due to normal vibrations of the movable top cover and / or external components.

[0030] In a preferred embodiment, the housing cavity comprises mutually opposite housing lateral walls, wherein the movable top cover further comprises top cover lateral walls extending from the active section towards the stationary housing, wherein the housing lateral walls and the top cover lateral walls are mutually clamped with their free ends, respectively.

[0031] The mutual clamping between the housing lateral walls and the top cover lateral walls can be realized in various ways, for example by providing mutually opposite hooks at the free ends of the housing lateral walls and the top cover lateral walls, respectively, or by providing mutually co-operable hooks and slots at the free ends of the housing lateral walls and the top cover lateral walls, or by providing a guide slot in the housing lateral walls and a pin co-operable with the guide slot at the free end of the top cover lateral walls.

[0032] In a preferred embodiment, the anti-pinch sensor comprises a microswitch.

[0033] To solve the technical problem, the present disclosure further provides an anti-pinch system comprising the anti-pinch device, a controller and a motor in communication connection with the anti-pinch device.

[0034] In a preferred embodiment, the anti-pinch device is in wireless communication connection with the controller.

[0035] In this way, the wired connection between the anti-pinch device and the controller and the motor is omitted. This not only simplifies the connection and makes the device structure simpler, but also eliminates the distance limitation between the anti-pinch device and the controller and the motor caused by the conductive wire, improves the design freedom, and can arrange the anti-pinch device at any desired position according to the needs.

[0036] In a preferred embodiment, when the anti-pinch sensor detects the displacement of the movable top cover relative to the stationary housing, the anti-pinch device sends an output signal to the controller, and the controller interrupts the operation of the motor or causes the motor to reverse based on the output signal.

[0037] To solve the technical problem, the present disclosure further provides a movable furniture unit comprising the anti-pinch device or the anti-pinch system.

[0038] In a preferred embodiment, the furniture unit comprises a first part, a second part movable relative to the first part, wherein the anti-pinch device is arranged on the second part, and a motor configured to cause the second part to move relative to the first part, thereby enabling the furniture unit to transform between a folded position and an unfolded position, wherein the distance between the second part and the first part increases when the furniture unit transforms from the folded position to the unfolded position.

[0039] In a preferred embodiment, the stationary housing of the anti-pinch device is arranged on the second part and the movable top cover is directed towards the space between the second part and the first part in the extended position.

[0040] A relative movement between the first part and the second part can occur, which can result in a pinch between the two parts. For this reason, an anti-pinch device is arranged on at least one of the parts in order to sensitively detect a contact of a foreign object or a living being, such as a pet or a child, with the part. The first part can be a part which remains stationary relative to the ground, such as a base part of a piece of furniture which is supported on the ground, or a part which moves during the movement of the piece of furniture, such as a movable seat part of an electrically operated sofa.

[0041] In a preferred embodiment, the furniture unit is a seat unit. Preferably, the second part is a footrest of the seat unit.

[0042] However, in an alternative embodiment, the second part can also be a movable armrest part, a backrest part.

[0043] The furniture unit is of course not limited to a seat unit, but a movable bed can also be considered, wherein the first part can be a main bed body which is supported on the ground and the second part can be a movable bed board or a bed head which can be raised.

[0044] It is stated here that the details and advantages described for the anti-pinch device also apply to the anti-pinch system and the furniture unit comprising such an anti-pinch device.

[0045] Reference signs

[0046] The embodiments of the application are explained in more detail below with the aid of the drawings.

[0047] Fig. 1 shows a schematic view of a furniture unit according to an embodiment of the present disclosure,

[0048] Fig. 2 shows a schematic circuit diagram of a motor control system according to an embodiment of the present disclosure,

[0049] Fig. 3 shows a schematic circuit diagram of a first execution position and a second manual position of a motor control system according to an embodiment of the present disclosure,

[0050] Fig. 4 shows a schematic circuit diagram of a first execution position and a third manual position of a motor control system according to an embodiment of the present disclosure,

[0051] Fig. 5 shows a schematic circuit diagram of a second execution position of a motor control system according to an embodiment of the present disclosure,

[0052] Fig. 6 shows a schematic block diagram of a motor control system according to an embodiment of the present disclosure,

[0053] Fig. 7 shows a schematic circuit diagram of a pinch protection sensor according to an embodiment of the present disclosure,

[0054] Fig. 8 shows a schematic in perspective view of a pinch protection device according to an embodiment of the present disclosure,

[0055] Fig. 9 shows a schematic in perspective view of parts of the pinch protection device of Fig. 8,

[0056] Fig. 10 shows a schematic cross section of the pinch protection device of Fig. 8,

[0057] Fig. 11 shows a schematic in perspective view of a pinch protection sensor of the pinch protection device of Fig. 8,

[0058] Fig. 12 shows a schematic in side view of the pinch protection sensor of Fig. 11,

[0059] Fig. 13 shows a schematic in partial enlarged view of the cross section of Fig. 10,

[0060] Fig. 14 shows a schematic block diagram of a pinch protection system according to the present disclosure,

[0061] Fig. 15 shows a schematic of a furniture unit according to the present disclosure, and

[0062] Fig. 16 shows a schematic circuit diagram of a motor control system according to another embodiment of the present disclosure. DETAILED DESCRIPTION

[0063] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0064] The term "one embodiment" or "an embodiment" as may appear in this specification are to be interpreted to mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the application. The appearances of the term "one embodiment" or "an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily referring to a single embodiment. In this specification, the terms "upper", "lower", "left", "right", "top", "bottom", and the like refer to directions or positions as shown in the figures and are used for convenience to describe the present application and its attendant drawings, and are not to be construed as indicating or implying that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed to limit the application. It is also noted that the terms "front-rear direction" or "front-rear direction of the seat unit" refer to the direction of the backrest and the ottoman of the seat unit with reference to the seat part, wherein the direction "rear" refers to the direction toward the backrest, and the direction "front" refers to the direction toward the ottoman. In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance or a specific number of the technical features indicated. Thus, the features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. Furthermore, the terms "first", "second", etc. are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances so that the embodiments of the application described herein can be implemented in an order other than that illustrated or described herein.

[0065] FIG. 1 shows a schematic view of a movable furniture unit 100 according to an embodiment of the present disclosure. The furniture unit 100 can be configured as a seat unit, for example.

[0066] The furniture unit 100 configured as a seat unit includes a sofa main body and an ottoman 12 movable with respect to the sofa main body. The sofa main body can include a backrest part 13, a sofa side panel 14, an armrest part 15 attached to the sofa side panel, and a seat part 16. In the present disclosure, the ottoman 12 is movable. For example, the ottoman 12 can be raised to elevate the user's legs, and can be stowed to lower the user's legs. In an embodiment of the present disclosure, the backrest part 13 is also movable, for example, the backrest part 13 can be laid down to allow the user to lie down to a certain extent, and the backrest part 13 can be stood up to support the user to sit on the sofa 100. In an embodiment of the present disclosure, the seat part 16 is also movable, for example, the seat part 16 can be moved forward to cooperate with the laying down of the backrest part 13, and the seat part 16 can be moved backward to cooperate with the standing up of the backrest part 13.

[0067] In the present disclosure, the furniture unit 100 further comprises a motor control system. The motor control system can be used to implement the above-mentioned actions. The motor control system can be used to drive the actions of the footrest 12, the backrest 13 and / or the seat 16 by a motor. For example, the motor control system can be used to drive the lifting of the footrest 12, the reclining of the backrest 13 and / or the forward movement of the seat 16 by forward rotation of the motor, and to drive the folding of the footrest 12, the standing of the backrest 13 and / or the backward movement of the seat 16 by reverse rotation of the motor. In embodiments according to the present disclosure, the above-mentioned actions can be controlled by a user, for example, by a control button 130 on the furniture unit 100. In further embodiments of the present disclosure, the motor control system can also be used to drive other components of the furniture unit 100 to perform actions. The motor control system according to the present disclosure also has an anti-pinch function. For example, during the lifting or folding of the footrest 12, there is a risk of pinching if a child or a pet enters the footrest area. In the event that such a pinching risk is sensed, the motor control system of the present disclosure can actively lift the footrest 12 to avoid the risk. In further embodiments of the present disclosure, the motor control system according to the present disclosure can also be applied to other movable components of a sofa, for example, the backrest 13 and / or the seat cushion, for anti-pinch.

[0068] Figures 2 to 5 show schematic circuit diagrams of a motor control system 200 according to embodiments of the present disclosure. The motor control system 200 comprises a motor M, a power supply P, a hand control switch 210 and an anti-pinch execution switch 220. The anti-pinch execution switch 220 is switchable between a first execution position and a second execution position. In the first execution position, the motor M is connected to the hand control switch 210 via the anti-pinch execution switch 220, and the polarity of the voltage applied to the motor M by the power supply P is changed by switching of the hand control switch 210. In the second execution position, the motor M is connected to the power supply P via the anti-pinch execution switch 220, and the motor M rotates and drives the seat unit to extend to implement anti-pinch.

[0069] In embodiments according to the present disclosure, the motor M can be configured as a DC motor, for example, and the power supply P can be configured as a DC power supply, for example. In further embodiments, the motor M can be configured as an AC motor, for example, and the power supply P can be configured as an AC power supply, for example.

[0070] The first and second execution positions of the anti-pinch execution switch 220 and the switching states of the hand control switch 210 are shown in detail in Figures 2 to 5.

[0071] In the embodiment shown in Figs. 2 to 5, the manual switch 210 can comprise, for example, a first switch element S1 and a second switch element S2. The manual switch 210 is, for example, actuated by the control button 130 of the seat unit 100, and the first switch element S1 and the second switch element S2 correspond to two buttons on the control button 130. The anti-pinch execution switch 220 can comprise, for example, a third switch element S3 and a fourth switch element S4. The first, second, third, and fourth switch elements S1, S2, S3, and S4 are, for example, configured as single-pole double-throw switches. The first switch element S1 and the second switch element S2 are switchable between a first, a second, and a third manual position.

[0072] Fig. 2 shows the initial state of the first, second, third, and fourth switch elements S1, S2, S3, and S4. As shown in Fig. 2, the third switch element S3 and the fourth switch element S4 in the anti-pinch execution switch 220 are in a first execution position, i.e. the motor M is connected via the third switch element S3 to the first end of the first switch element S1 and via the fourth switch element S4 to the first end of the second switch element S2. The first switch element S1 and the second switch element S2 in the manual switch 210 are in a first manual position, i.e. the second end of the first switch element S1 and the second end of the second switch element S2 are connected to the second pole (negative pole in the illustration) of the power supply P, respectively. As a result, the motor M does not rotate and the movable parts of the seat unit 100 do not move.

[0073] Fig. 3 shows the case where the third switch element S3 and the fourth switch element S4 are in the first execution position and the first switch element S1 and the second switch element S2 are in a second manual position. In the second manual position, the second end of the first switch element S1 is connected to the first pole (positive pole in the illustration) of the power supply P and the second end of the second switch element S2 is connected to the second pole (negative pole in the illustration) of the power supply P. In this case, the motor can, for example, rotate in the forward direction and drive the seat unit 100 to extend, for example, the footrest 120 of the seat unit 100 to be raised.

[0074] Fig. 4 shows the case where the third switch element S3 and the fourth switch element S4 are in the first execution position and the first switch element S1 and the second switch element S2 are in a third manual position. In the third manual position, the second end of the first switch element S1 is connected to the second pole (negative pole in the illustration) of the power supply P and the second end of the second switch element S2 is connected to the first pole (positive pole in the illustration) of the power supply P. In this case, the motor M can, for example, rotate in the reverse direction and drive the seat unit 100 to retract, for example, the footrest 120 of the seat unit 100 to be stowed.

[0075] Fig. 5 shows the case where the third switch element S3 and the fourth switch element S4 are in the second execution position. In the second execution position, the motor M is connected to the first pole (positive pole in the illustration) of the power supply P via the third switch element S3 and to the second pole (negative pole in the illustration) of the power supply P via the fourth switch element S4. In the second execution position, the connection of the first switch element S1 and the second switch element S2 to the motor M is disconnected, so that the switching state of the first switch element S1 and the second switch element S2 can no longer change the operating state of the motor M. In the second execution position, the motor M can, for example, be rotated in the positive direction and drive the seat unit 100 to extend, for example, the footrest 120 of the seat unit 100 to be raised.

[0076] The second execution position corresponds to the anti-pinch function of the motor control system 200 according to the present disclosure. In the motor control system 200 according to the present disclosure, the first, second, third, and fourth switch elements S1, S2, S3, and S4 form the core of the control of the motor M. Compared to the prior art, which is centered on the signal transmission of the control module, the structure of the motor control system 200 according to the present disclosure is simpler, has higher robustness, and has lower manufacturing cost.

[0077] In embodiments according to the present disclosure, the first switch element S1 and the second switch element S2 can, for example, each be configured as a normally open normally closed micro switch, the third switch element S3 and the fourth switch element S4 can, for example, each be configured as a normally open normally closed relay, and the first hand control position corresponds to the normally closed position of the first switch element S1 and the second switch element S2. The first execution position corresponds to the normally closed position of the third switch element S3 and the fourth switch element S4. In other words, the switching state shown in Fig. 2 is the normally closed position of the first, second, third, and fourth switch elements S1, S2, S3, and S4.

[0078] When the user holds down the first switch element S1, i.e. the first switch element S1 switches from normally closed to normally open, the motor M can, for example, be rotated in the positive direction and drive the seat unit 100 to extend, for example, the footrest 120 of the seat unit 100 to be raised. When the user releases the first switch element S1, i.e. the first switch element S1 switches back from normally open to normally closed, the motor M stops rotating in the positive direction, and the seat unit 100 stops extending, for example, the footrest 120 of the seat unit 100 stops being raised.

[0079] When the user holds down the second switch element S2, i.e. the second switch element S2 switches from normally closed to normally open, the motor M can, for example, be rotated in the negative direction and drive the seat unit 100 to retract, for example, the footrest 120 of the seat unit 100 to be stowed. When the user releases the second switch element S2, i.e. the second switch element S2 switches back from normally open to normally closed, the motor M stops rotating in the negative direction, and the seat unit 100 stops retracting, for example, the footrest 120 of the seat unit 100 stops being stowed.

[0080] In embodiments according to the present disclosure, the operation or state of the third switching element S3 and the fourth switching element S4 can be controlled by a further control module, as will be explained in more detail later. When the further control module determines that there is a pinch danger, it sends an operation signal to the third switching element S3 and the fourth switching element S4, and the third switching element S3 is controlled to switch from normally closed to normally open, and the fourth switching element S4 is controlled to switch from normally closed to normally open. If the user is manually reversing the motor M, i.e. the seat unit 100 is retracting, and there is a pinch danger, the seat unit 100 is forced to extend, i.e. the motor M is forced to rotate in the normal direction. If the user is manually rotating the motor M in the normal direction, i.e. the seat unit 100 is extending, the seat unit 100 continues to extend, i.e. the motor M continues to rotate in the normal direction.

[0081] The motor control system according to the present disclosure is realized by adding the anti-pinch execution switch 220, i.e. the third switching element S3 and the fourth switching element S4, to the original manually controlled switch 210, i.e. the first switching element S1 and the second switching element S2. Since the third switching element S3 and the fourth switching element S4 are connected in normally closed state between the first switching element S1 and the second switching element S2 and the motor M, the failure or malfunction of the third switching element S3 and the fourth switching element S4 will not affect the normal control of the motor M of the seat unit 100 by the first switching element S1 and the second switching element S2. When the anti-pinch function is needed, the third switching element S3 and the fourth switching element S4 can be controlled to force switch the motor M working circuit of the seat unit 100, achieving the anti-pinch effect of forcing the motor M to rotate in the normal direction.

[0082] Fig. 6 shows a schematic block diagram of a motor control system 600 according to an embodiment of the present disclosure. In relation to the motor control system 200 shown in Figs. 2 to 5, the motor control system 600 shown in Fig. 6 further comprises an anti-pinch sensor 63, an anti-pinch signal receiver 70 and a control unit 3. In the case that the anti-pinch sensor 63 is triggered, the anti-pinch sensor 6 sends a trigger signal to the anti-pinch signal receiver 70, the anti-pinch signal receiver 70 receives the trigger signal, the anti-pinch signal receiver 70 generates an anti-pinch signal according to the trigger signal and transmits it to the control unit 3, the control unit 3 sends an execution signal to the anti-pinch execution switch 220 according to the anti-pinch signal, and the anti-pinch execution switch 220 switches from the first execution position to the second execution position according to the execution signal.

[0083] In combination with the embodiment in which the third switching element S3 and the fourth switching element S4 of the anti-pinch execution switch 220 are configured as normally open and normally closed relays, the third switching element S3 and the fourth switching element S4 switch from the normally closed position of Figs. 2 to 4 to the normally open position shown in Fig. 5 when receiving the execution signal.

[0084] In a further embodiment according to the present disclosure, the motor control system 600 further comprises a prompting unit 4, which is shown in Fig. 6 with a dashed box. The control unit 3 sends a prompting trigger signal to the prompting unit 4 according to the anti-pinch signal, and the prompting unit 4 sends a prompt according to the prompting trigger signal. The prompting trigger signal can be an acoustic and / or optical prompt, for example.

[0085] Fig. 7 shows a schematic circuit diagram of the anti-pinch sensor 63 according to an embodiment of the present disclosure. The anti-pinch sensor 63 comprises a trigger piece 632, a trigger switch 633, a signal emitter 634, and a sensor power supply 635. The trigger switch 633, the signal emitter 634, and the sensor power supply 635 are connected in series and form a loop. In the case that the trigger piece 632 is not triggered, the trigger switch 633 is open, and the loop is broken. In the case that the trigger piece 632 is triggered, the trigger switch 633 is closed, the loop is closed, and the signal emitter 634 emits a trigger signal.

[0086] According to an embodiment of the present disclosure, the trigger piece 632 can be configured as a key or a button, for example. In this embodiment, a corresponding elastic element can be arranged such that the trigger piece 632 does not exert a force on the trigger switch 633 in the case that it is not pressed. At this time, the trigger switch 633 remains open. Only when the trigger piece 632 is pressed, the trigger switch 633 is closed.

[0087] The anti-pinch sensor 63 according to an embodiment of the present disclosure can ensure that the signal emitter 634 is powered only when triggered, and in the case that it is not triggered, the power consumption of the anti-pinch sensor 63 is zero. Therefore, such an anti-pinch sensor 63 can achieve very low power consumption. Therefore, the sensor power supply 635 can be designed to be smaller and less costly.

[0088] In an embodiment according to the present disclosure, the trigger signal can be transmitted from the anti-pinch sensor 63 to the anti-pinch signal receiver 70 in a wireless transmission manner, for example. In this embodiment, the anti-pinch signal receiver 70 can have a pairing unit 71, which is shown in Fig. 6 with a dashed box. Through the pairing unit 71, a wireless communication connection can be established between the anti-pinch signal receiver 70 (its pairing unit 71) and the anti-pinch sensor 63 (its signal emitter 613), for example. In particular, a wireless communication connection can be established between one anti-pinch signal receiver 70 and one anti-pinch sensor 63, i.e. a one-to-one pairing of the anti-pinch signal receiver 70 and the anti-pinch sensor 63, for example. Alternatively, a wireless communication connection can also be established between one anti-pinch signal receiver 70 and multiple anti-pinch sensors 63, i.e. a one-to-many pairing of the anti-pinch signal receiver 70 and the anti-pinch sensor 63, for example. Through the one-to-one pairing or the one-to-many pairing described above, signal crosstalk between multiple anti-pinch signal receivers can be prevented.

[0089] The anti-pinch sensor 63, in particular the signal transmitter 613, can have a first communication unit, for example, and the anti-pinch signal receiver 70 can have a second communication unit, for example, which can communicate with each other before the first connection to establish a wireless signal transmission path. The anti-pinch sensor 63, in particular the signal transmitter 613, can have an encoding unit, for example, and the anti-pinch signal receiver 70 can have a decoding unit, for example. The encoding unit can send a signal using the wireless signal transmission path, and the decoding unit can receive and decode the signal and generate a trigger signal.

[0090] In an embodiment according to the present disclosure, the anti-pinch sensor 63 can be arranged in the anti-pinch device 6 of the furniture unit 100, for example.

[0091] The anti-pinch device 6 according to the present disclosure is schematically shown below with the aid of Figures 8 to 14.

[0092] It is noted here that the "front-rear direction" in the present disclosure is in terms of the extension direction of the leg extension device of the furniture unit, in particular the seat unit, and in particular, the "front" refers to the direction towards the leg extension device, and the "rear" refers to the direction towards the backrest assembly. The "left-right direction" or "lateral direction" is in terms of the horizontal direction perpendicular to the "front-rear direction" of the furniture unit, in particular the seat unit. The "longitudinal direction" refers to the extension direction of the anti-pinch device 6 which has a significantly larger dimension than the other two spatial directions. The "height direction" refers to the displacement direction of the movable top cover 62 of the anti-pinch device 6 relative to the fixed housing 61, and also refers to the displacement direction of the trigger piece 632 of the anti-pinch sensor 63 relative to the base 631.

[0093] Figure 8 schematically shows the anti-pinch device 6 according to an embodiment of the present disclosure in a perspective view. The anti-pinch device 6 is configured to be longitudinally long, i.e. as shown in Figure 8, it has a significantly larger dimension in the longitudinal direction x than in the other two spatial directions perpendicular to the longitudinal direction. The anti-pinch device 6 comprises a fixed housing 61, a movable top cover 62 and at least one anti-pinch sensor which is not shown in Figure 8. End covers 64 are provided on both ends of the anti-pinch device 6, respectively. In particular, the fixed housing 61 and the movable top cover 62 are longitudinally long and parallel to each other, wherein the end covers 64 are fixedly connected to the two ends of the fixed housing, respectively. As a result, the end covers 64 are arranged adjacent to the movable top cover 62, thereby constituting directional guidance for the movable top cover 62 when the movable top cover 62 is displaced relative to the fixed housing 61.

[0094] Figure 9 schematically shows a perspective view of the anti-pinch device 6, with the movable top cover 62 of the anti-pinch device 6 removed for clarity to reveal the internal structure thereof. Figure 10 shows a cross-section of the anti-pinch device 6.

[0095] The stationary housing 61 forms a housing cavity 610 which comprises a housing bottom 611 and two housing side walls 612 which extend upwards from the housing bottom 611 and which are opposite to each other.

[0096] The stationary housing 61 and the movable top cover 62 can be mirror-symmetrically configured in their respective cross sections. Preferably, the stationary housing 61 and the movable top cover 62 can have a constant cross section in the longitudinal extension direction x. Thereby, a cost-effective production from a plastic material by a simple production process, for example an extrusion process, is possible.

[0097] One or more anti-pinch sensors 63 are arranged between the movable top cover 62 and the stationary housing 61. In the embodiment shown in Fig. 9, for example, the anti-pinch device 6 comprises four anti-pinch sensors 63. However, in embodiments not shown, more or fewer anti-pinch sensors can of course also be provided as required. The anti-pinch sensor 63 is configured to detect a displacement of the movable top cover 62 relative to the stationary housing 61.

[0098] In the embodiment shown in Figs. 11 and 12, the anti-pinch sensor 63 is configured as a microswitch.

[0099] As shown in Fig. 11, the anti-pinch sensor 63 comprises a base body 631 and a trigger 632. The base body 631 is fixedly mounted in the housing cavity 610 relative to the stationary housing 61, while the trigger 632 is pin-shaped configured and comprises a trigger top end 6321 which protrudes outward from the base body 631 and a trigger bottom end which is opposite thereto and which is inserted into the base body 631. The trigger bottom end, which is not explicitly shown, is movably supported in the base body 631. In particular, the trigger bottom end can be elastically resettable supported in the base body 631 by means of an elastic element, for example a tension spring or a leaf spring, so that it can be displaced relative to the base body 631 in the direction of the longitudinal axis L of the trigger 632, i.e. in the height direction z, against the spring force of the elastic element under the action of an external force.

[0100] As shown in Fig. 13, the movable top cover 62 comprises an action section 621 and two top cover side walls 622 which extend downwards from the action section 621 towards the stationary housing 61 and which are opposite to each other. The action section 621 is curvedly configured, wherein the action section 621 comprises an inner surface 6211 which faces the stationary housing 61, and thus the anti-pinch sensor 63, and an outer surface 6212 which faces the outside of the anti-pinch device 6.

[0101] The fixed housing 61 and the movable top cover 62 are mutually snap-fitted. To this end, the top cover lateral wall 622 has a greater width in the transverse direction y perpendicular to the longitudinal extension direction x than the housing lateral wall 612, wherein a top cover snap hook 622a protruding towards the outside of the housing lateral wall 612 is provided on the free end of the top cover lateral wall 622, and a housing snap hook 612a protruding towards the inside of the top cover lateral wall 622 is provided on the free end of the housing lateral wall 612. The snap-fitting between the fixed housing 61 and the movable top cover 62 is achieved by the mutual cooperation of the housing snap hook 612a and the top cover snap hook 622a.

[0102] When an external force is applied on the active section 621 of the movable top cover 62, the movable top cover 62 moves downwards in the height direction z relative to the fixed housing 61. The anti-pinch sensor 63 arranged in the housing cavity 610 of the fixed housing 61 has its trigger head 6321 in contact with the inner surface 6211 of the active section 621 of the movable top cover 62, so that the trigger 632 can be displaced downwards in the longitudinal axis L direction relative to the base 631 when the movable top cover 62 is displaced relative to the fixed housing 61 in a direction parallel to the longitudinal axis L.

[0103] In this case, if the active section 621 is configured as a plane perpendicular to the height direction z, i.e. a plane in the x-y plane, the plane- configured active section 621 can be very sensitive to downward movement under the action of an external force applied in the height direction z. However, when the force is not applied in the height direction z, but is applied obliquely at an angle relative to the height direction z on the active section 621, the active section 621 can not respond sufficiently sensitively.

[0104] To this end, the active section 621 of the movable top cover 62 is configured with an arc-shaped outward convexity on its outer surface 6212 over an angular range of at least 180°, as shown in the cross-sectional views of Figures 10 and 13. In this way, whether the force applied on the outer surface 6212 of the active section 621 is parallel to the height direction z or not, the force can act most effectively on the outer surface 6212, thereby lowering the threshold of the force required for the movable top cover 62 to respond, i.e. to produce a downward displacement. In an advantageous design, only a weight of 50 g is required to cause the downward displacement of the movable top cover 62 relative to the fixed housing 61 to be sufficient to trigger the anti-pinch device 6.

[0105] In order to prevent the active top cover 62 from being displaced downwardly relative to the fixed housing 61 too much and damaging the pinch protection sensor 63, an inwardly protruding top cover stop 622b is provided on the top cover lateral wall 622 of the active top cover 62, which has a spacing between the top cover hook 622a and the housing hook 612a on the housing lateral wall 612 of the fixed housing 61, which is greater than the dimension of the housing hook 612a in the height direction, and can abut against the housing hook 612a, thereby limiting the displacement of the active top cover 62 relative to the fixed housing 61 within a safe range.

[0106] In an embodiment not shown, the mutual engagement between the housing lateral wall and the top cover lateral wall can also be realized in different ways. For example, a longitudinal guide groove extending in the height direction is provided on the housing lateral wall 612, and an inwardly protruding pin is provided on the top cover lateral wall 622, wherein the pin is movably inserted into the guide groove, thereby limiting the displacement of the active top cover 62 relative to the fixed housing 61 within a safe range.

[0107] Preferably, the top end 6321 of the trigger is also configured in an arch shape. Correspondingly, a receiving groove 6211a is provided on the inner surface 6211 of the active top cover 62 which cooperates with the trigger. The receiving groove 6211a can be configured as a recess inwardly from the inner surface of the active section 6211, or can be defined by a limiting rib 6211b formed on the inner surface 6211, as shown in Fig. 13. The top end 6321 of the trigger is arranged in the receiving groove 6211a in a generally form-fitting manner, so that the apex of the top end 6321 of the trigger is in contact with the bottom of the receiving groove 6211a, to ensure the sensitivity of the trigger. At the same time, in order to prevent the pinch protection device 6 from being too sensitive, so that normal vibration also causes triggering of the pinch protection sensor 63, the circumferential section of the top end 6321 of the trigger is preferably kept a certain distance from the receiving groove 6211a, so that normal operation, such as normal vibration of the equipment to which the pinch protection device 6 is applied, does not cause false triggering of the pinch protection sensor 63.

[0108] Overall, the displacement of the active top cover 62 relative to the fixed housing 61 drives the displacement of the trigger 632 relative to the base 631, thereby triggering the pinch protection sensor 63, and further causing the pinch protection device 6 to send a trigger signal.

[0109] Fig. 14 schematically shows a functional block diagram of a pinch protection system comprising the above-described pinch protection device 6. Fig. 15 schematically shows a furniture unit 100 equipped with the pinch protection system. The function of the pinch protection system and its application in the furniture unit will be described below with reference to Figs. 14 and 15.

[0110] As shown in Fig. 14, the anti-trapping system comprises an anti-trapping device 6, a control unit 3 and a motor M, alternatively also a prompting unit 4. In the embodiment as shown in Fig. 14, the furniture unit 100 is configured as a movable seating unit comprising a base 11 fixedly supported on the ground and a leg extension device with a footrest 12, a seat portion and a backrest assembly movable relative to the base 11. The motor M is arranged at the base 11, by means of which the leg extension device, the seat portion and the backrest assembly are caused to move relative to the base 11, so that the seating unit is transformed between a sitting position as shown in Fig. 15, a TV position not specifically shown and / or a lying position. In the stowed position, i.e. in the sitting position, the footrest 12 of the leg extension device is stowed as the second component under the seat portion, at which time the distance between the footrest 12 as the second component and the base 11 as the first component is minimal. In the extended position, i.e. in the TV position or the lying position, the leg extension device together with its footrest 12 is extended forward, at which time the distance between the footrest 12 and the base 11 is increased, so that a larger space is formed between the footrest 12 and the base 11. Once a pet or a child enters the space, it is possible to be trapped between the footrest and the base when the seating unit is reset from the TV position or the lying position to the sitting position.

[0111] In order to avoid the risk of trapping, the anti-trapping device 6 is installed on the bottom side of the footrest 12. The anti-trapping device 6 is arranged in spatial distance relative to the control unit 3 and the motor M and is in wireless communication connection with the control unit 3.

[0112] As shown in Fig. 8, the end cover 64 of the anti-trapping device 6 comprises a mounting flange 641 extending outward in the longitudinal extension direction x, on which a through hole for a bolt is provided. By means of the mounting flange 641, the fixed housing 61 of the anti-trapping device 6 is fixedly connected to the bottom side of the footrest 12 by screw connection, and the movable top cover 62 faces the space between the base 1140 and the footrest 12, wherein the anti-trapping device 6 is arranged along the transverse direction close to the front edge of the footrest 12. However, in an embodiment not shown, the anti-trapping device 6 can also be arranged in different orientations at different positions of the furniture as required, for example, the anti-trapping device 6 can be arranged longitudinally at both side edges of the bottom side of the footrest 12.

[0113] During the return of the seat unit to the sitting position, the footrest 12 is moved backwards under the influence of the motor M in the direction towards the base 11. During this movement, when a pet or a child in the space between the footrest 12 and the base 11 touches the movable cover 62 of the anti-pinch device 6, an external force is applied to the movable cover 62, and the movable cover 62 is displaced relative to the fixed housing 61, which in turn causes the displacement of the trigger 632 of the anti-pinch sensor 63 relative to the base 631. The anti-pinch device 6 thus detects the displacement of the trigger 632 relative to the base 631, and accordingly sends a trigger signal to the control unit 3 in a wireless manner. The control unit 3 interrupts the operation of the motor M or causes the motor M to reverse based on the trigger signal, so as to prevent the footrest 12 from continuing to move towards the base 11, or to cause the footrest 12 to move away from the base 11, so as to eliminate the risk of pinching. At the same time, in the anti-pinch system comprising the prompting unit 4, a signal, such as an alarm sound, a flashing light or a tactile alarm, which can be perceived by the user, is also sent through the prompting unit 4 accordingly.

[0114] Tests show that, according to the embodiments of the present disclosure, the distance of the movement of the movable cover 62 relative to the fixed housing 61 from the collision of the anti-pinch device 6 to the stop of the motor M is only, for example, 2 mm.

[0115] It is also to be noted that FIG. 15 only exemplarily shows the furniture unit 100 according to the present disclosure. In an embodiment not shown, in the case where the furniture unit 100 is configured as a seat unit, the first component is not limited to the base 11, and the second component is not limited to the footrest 12. As long as the first component and the second component can move relative to each other. For example, the first component can be the base 11, and the second component can be a backrest part 13 or an armrest part 15 movable relative to the base 11; or the first component can be the armrest part 15, and the second component can be the footrest 12 movable relative to the armrest part 15.

[0116] In addition, the furniture unit 100 is also not limited to the seat unit described in FIG. 15. In an embodiment not shown, the furniture unit 100 can also be a movable bed, and accordingly, the first component can be a main bed body fixedly supported on the ground, and the second component can be a movable bed board or a bed head.

[0117] Fig. 16 shows a schematic circuit diagram of a motor control system 800 according to another embodiment of the present disclosure. In comparison to the motor control system 200 shown in Figs. 2 to 5, the motor control system 800 shown in Fig. 16 additionally has a limit switch 810 connected between the motor M and the anti-pinch execution switch 220, for example between the motor M and the third switch element S3 or the fourth switch element S4. The limit switch 810 has a fifth switch element S5, a sixth switch element S6, a first diode D1 and a second diode D2. The fifth switch element S5 and the sixth switch element S6 are connected in series. The first diode D1 is connected in parallel to the fifth switch element S5 and the second diode D2 is connected in parallel to the sixth switch element S6, the first diode D1 and the second diode D2 having opposite conduction directions. In embodiments according to the present disclosure, the fifth switch element S5 and the sixth switch element S6 can for example be configured as a normally open and normally closed micro switch, and only when the first limit position of the furniture unit 100 is reached, the fifth switch element S5 is open (normal open position) and only when the second limit position of the furniture unit 100 is reached, the sixth switch element S5 is open (normal open position).

[0118] In embodiments according to the present disclosure, for example when a forward voltage / current is applied to the motor M (which is shown in Fig. 16 by the arrow to the right), the motor rotates forward and the furniture unit 100 is extended, for example the footrest 12 is lifted up. When a reverse voltage / current is applied to the motor M (which is shown in Fig. 8 by the arrow to the left), the motor rotates reverse and the furniture unit 100 is retracted, for example the footrest 12 is folded up. When the extension or retraction of the furniture unit 100 reaches the maximum limit, it is necessary to limit the further movement of the furniture unit to avoid damage of the mechanical parts of the furniture unit 100, for example the movable support, and the electrical parts, for example the motor M. In this embodiment, the limit switch 810 is connected between the motor M and the third switch element S3. The first diode D1 is arranged with its conduction direction in accordance with the above-mentioned forward voltage / current direction and the second diode D2 is arranged with its conduction direction in accordance with the above-mentioned reverse voltage / current direction.

[0119] In this embodiment, when the motor M rotates forward and the furniture unit 100 reaches the maximum extension, i.e. reaches the second limit position, the sixth switch S6 is switched from on (normal closed position) to off. Due to the one-way conduction of the second diode D2, a forward current cannot flow through the motor M, but a reverse current can flow through the motor M, i.e. the motor M is no longer able to rotate forward but can rotate reverse. This limits the over-extension of the furniture unit 100 and can allow the retraction of the furniture unit 100. After the furniture unit 100 leaves the second limit position, the sixth switch S6 is switched from off to on.

[0120] When the motor M is reversed and the furniture unit 100 reaches the maximum retracted extent, i.e. reaches the first limit position, the fifth switch S5 is switched from on (normally closed position) to off. Due to the unidirectional conduction of the first diode D1, a reverse current cannot flow through the motor M, but a forward current can flow through the motor M, i.e. the motor M can no longer be reversed but can be forward rotated. This limits the over-retraction of the furniture unit 100 and can allow the extension of the furniture unit 100. After the furniture unit 100 has left the first limit position, the fifth switch S6 is switched from off to on.

[0121] The block diagrams of the circuits, units, devices, apparatuses, devices, systems referred to in the present disclosure are only exemplary examples and are not intended to require or imply that the connection, arrangement, configuration must be as shown in the block diagrams. As those skilled in the art will recognize, these circuits, units, devices, apparatuses, devices, systems can be connected, arranged, configured in any manner as long as the desired purpose can be achieved. The circuits, units, devices, apparatuses referred to in the present disclosure can be implemented in any suitable manner, for example, in the form of application specific integrated circuits, field programmable gate arrays (FPGA), etc., or in the form of general purpose processors combined with programs.

Claims

1. A motor control system for a movable furniture unit, comprising: a motor, a power supply, a hand control switch and an anti-pinch execution switch; wherein the anti-pinch execution switch is switchable between a first execution position and a second execution position; in the first execution position, the motor is connected to the hand control switch via the anti-pinch execution switch, and the polarity of the voltage applied to the motor by the power supply is changed by switching of the hand control switch; and in the second execution position, the motor is connected to the power supply via the anti-pinch execution switch, the motor rotates and drives the furniture unit to extend to achieve anti-pinch.

2. The motor control system of claim 1, further comprising: an anti-pinch sensor, an anti-pinch signal receiver and a control unit, wherein, in the event that the anti-pinch sensor is triggered, the anti-pinch sensor sends a trigger signal to the anti-pinch signal receiver, the anti-pinch signal receiver receives the trigger signal, the anti-pinch signal receiver generates an anti-pinch signal in accordance with the trigger signal and transmits it to the control unit, the control unit sends an execution signal to the anti-pinch execution switch in accordance with the anti-pinch signal, and the anti-pinch execution switch switches from the first execution position to the second execution position in accordance with the execution signal.

3. The motor control system of claim 2, wherein, the anti-pinch sensor comprises: a trigger, a trigger switch, a signal transmitter and a sensor power supply, wherein the trigger switch, the signal transmitter and the sensor power supply are connected in series and form a loop, wherein, in the event that the trigger is not triggered, the trigger switch is off, the loop is open; in the event that the trigger is triggered, the trigger switch is on, the loop is closed and the signal transmitter emits the trigger signal.

4. The motor control system according to claim 2, further comprising a prompting unit, the control unit sends a prompting trigger signal to the prompting unit in accordance with the anti-pinch signal, and the prompting unit issues a prompt in accordance with the prompting trigger signal.

5. The motor control system of claim 2, wherein, the anti-pinch signal receiver has a pairing unit for establishing a wireless communication connection between one anti-pinch signal receiver and one or more anti-pinch sensors.

6. The motor control system of claim 1, wherein, the hand control switch comprises a first switch element and a second switch element, the hand control switch is switchable between a first, a second and a third hand control position, the anti-pinch execution switch comprises a third switch element and a fourth switch element, and the first, second, third and fourth switch elements are configured as single-pole double-throw switches, and wherein in the second execution position, the motor is connected to a first pole of the power supply via the third switch element, and to a second pole of the power supply via the fourth switch element; in the first execution position, the motor is connected to a first end of the first switch element via the third switch element, and to a first end of the second switch element via the fourth switch element, and in the first hand control position, a second end of the first switch element and a second end of the second switch element are connected to the second pole of the power supply, respectively, - in a second manual position, the second end of the first switching element is connected to the first pole of the power supply and the second end of the second switching element is connected to the second pole of the power supply, - in a third manual position, the second end of the first switching element is connected to the second pole of the power supply and the second end of the second switching element is connected to the first pole of the power supply.

7. The motor control system of claim 5, wherein, The first switching element and the second switching element are configured as normally open and normally closed micro switches, the third switching element and the fourth switching element are configured as normally open and normally closed relays, wherein the first manual position corresponds to a normally closed position of the first switching element and the second switching element, and the first execution position corresponds to a normally closed position of the third switching element and the fourth switching element.

8. The motor control system of claim 5, wherein, In the second execution position, the motor rotates in forward direction; In the first execution position, - in the second manual position, the motor rotates in forward direction, and - in the third manual position, the motor rotates in reverse direction.

9. The motor control system according to claim 1, further comprising a limit switch connected between the motor and the anti-pinch execution switch, and the limit switch comprises a fifth switching element, a sixth switching element, a first diode and a second diode, wherein the fifth switching element and the sixth switching element are connected in series, the first diode is connected in parallel to the fifth switching element, the second diode is connected in parallel to the sixth switching element, the first diode and the second diode have opposite conduction directions.

10. The motor control system of claim 9, wherein, The fifth switching element and the sixth switching element are configured as normally open and normally closed micro switches, and only when the first limit position of the furniture unit is reached, the fifth switching element is opened, and only when the second limit position of the furniture unit is reached, the sixth switching element is opened.

11. A furniture unit, comprising: a motor control system according to any one of claims 1 to 10, a sofa body, and a footrest, wherein a forward rotation of the motor causes the footrest to be raised and a reverse rotation of the motor causes the footrest to be lowered.

12. An anti-pinch device, comprising: a stationary housing forming a housing cavity; a movable top cover comprising an action section, by means of an action force applied on the action section, the movable top cover can be displaced relative to the stationary housing; and at least one anti-pinch sensor arranged between the stationary housing and the movable top cover and configured to detect a displacement of the movable top cover relative to the stationary housing, wherein the anti-pinch sensor comprises a base body arranged fixed in the housing cavity and a trigger member displaceable relative to the base body, a displacement of the movable top cover relative to the stationary housing causes a displacement of the trigger member relative to the base body, and wherein the action section comprises an inner surface facing the anti-pinch sensor and an outer surface facing an outside of the anti-pinch device, wherein the outer surface is configured at least partially arc-shaped convexly.

13. The anti-pinch device of claim 12, wherein, The outer surface is configured mirror-symmetrically.

14. The anti-pinch device of claim 12, wherein, The stationary housing and the movable top cover extend longitudinally parallel to each other, wherein an end cap is provided at an end of the stationary housing.

15. The anti-pinch device 6) of claim 12, wherein, The trigger piece comprises a trigger piece tip which is contactable with the inner surface of the action section.

16. The anti-pinch device of claim 15, wherein, The trigger piece tip comprises a convex curvature.

17. The anti-pinch device of claim 16, wherein, The trigger piece tip is dome-shaped.

18. The anti-pinch device of claim 15, wherein, The inner surface comprises a receiving groove in which the trigger piece tip is received.

19. The anti-pinch device of claim 18, wherein, The trigger piece tip is at least partially received in the receiving groove with a clearance.

20. The anti-pinch device of claim 12, wherein, The housing cavity comprises mutually opposite housing side walls, wherein the movable top cover further comprises top cover side walls which extend from the action section towards the stationary housing, wherein the housing side walls and the top cover side walls are mutually clamped with their free ends, respectively.

21. The anti-pinch device of claim 12, wherein, The anti-pinch sensor comprises a micro switch.

22. An anti-pinch system comprising the anti-pinch device according to any one of claims 12 to 21, a control unit in communication with the anti-pinch device, and a motor.

23. The anti-pinch system according to claim 22, wherein, The anti-pinch device is in wireless communication with the control unit.

24. The anti-pinch system according to claim 22, wherein, When the anti-pinch sensor detects displacement of the movable top cover relative to the stationary housing, the anti-pinch device sends an output signal to the control unit, and the controller interrupts operation of the motor or causes the motor to reverse based on the output signal.

25. A movable furniture unit comprising the anti-pinch device according to any one of claims 12 to 21 or the anti-pinch system according to any one of claims 22 to 24.

26. The furniture unit of claim 25, wherein, The furniture unit comprises: a first part; a second part which is movable relative to the first part, wherein the anti-pinch device is arranged on the second part; and 27. The furniture unit of claim 26, wherein, a motor configured to cause the second part to move relative to the first part, thereby enabling the furniture unit to transform between a collapsed position and an extended position, wherein the distance between the second part and the first part increases when the furniture unit transforms from the collapsed position to the extended position.

28. The furniture unit of claim 26, wherein, The stationary housing of the anti-pinch device is arranged on the second part, and the movable top cover faces a space between the second part and the first part in the extended position.

29. The furniture unit of claim 28, wherein, The furniture unit is a seating unit. The second part is a footrest and / or a backrest part and / or an armrest part of the seating unit. The second part is a footrest and / or a backrest part and / or an armrest part of the seating unit.

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