Motor control system for movable sofa and movable sofa

Abstract

The utility model relates to a motor control system for a movable sofa. The motor control system comprises a motor, a power supply, a manual 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 manual control switch through the anti-pinch execution switch, and the polarity of the voltage applied to the motor by the power supply is changed through switching of the manual control switch; and in the second execution position, the motor is connected to the power supply through the anti-pinch execution switch, and the motor rotates and drives the movable sofa to stretch so as to realize anti-pinch. The utility model also relates to a movable sofa with the motor control system.

Description

Technical Field

[0001] The utility model relates to a motor control system for a movable sofa and a movable sofa. Background Art

[0002] With the widespread use of electric telescopic multifunctional sofas, the problem of safety and stability has become increasingly prominent. When the sofa leg lift is opened or folded, if a child or pet enters the leg lift area, there is a danger of being caught.

[0003] The anti-pinch solutions currently available on the market are basically based on the control module. The hand control button signal and anti-pinch sensing signal are connected to the control module, and then the driver module controls the main motor of the functional sofa to achieve normal extension 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 normal extension and retraction of the sofa will be lost. Utility Model Content

[0004] Therefore, the technical problem to be solved by the utility model is to provide a motor control system for a movable sofa and a movable sofa, which can simply and reliably realize the anti-pinch function of the sofa, and the coordination of the anti-pinch function and the basic use function.

[0005] The utility model provides a motor control system for a movable sofa, the motor control system comprising: a motor, a power supply, a manual 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 manual switch through the anti-pinch execution switch, and the voltage polarity applied by the power supply to the motor is changed by switching the manual switch; and in the second execution position, the motor is connected to the power supply through the anti-pinch execution switch, and the motor rotates and drives the movable sofa to extend to achieve anti-pinch.

[0006] In an embodiment according to the utility model, the motor control system also includes: an anti-pinch sensor, an anti-pinch signal receiver and a control unit, wherein, when 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.

[0007] In an embodiment according to the utility model, the anti-pinch sensor includes: a trigger member, 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 circuit, wherein when the trigger member is not triggered, the trigger switch is disconnected and the circuit is broken; when the trigger member is triggered, the trigger switch is connected, the circuit is energized and the signal transmitter transmits the trigger signal.

[0008] In an embodiment of the present utility model, the motor control system further comprises a prompt unit, the control unit sends a prompt trigger signal to the prompt unit according to the anti-pinch signal, and the prompt unit sends a prompt according to the prompt trigger signal.

[0009] In an embodiment of the present invention, the anti-pinch signal receiver has a pairing unit, and the pairing unit is used to establish a wireless communication connection between one of the anti-pinch signal receivers and one or more of the anti-pinch sensors.

[0010] In an embodiment according to the present utility model, the manual switch includes a first switch element and a second switch element, and the manual switch can be switched between a first, a second and a third manual position, the anti-pinch execution switch includes a third switch element and a fourth switch element, and the first, second, third and fourth switch elements are constructed as single-pole double-set switches, and wherein, in the second execution position, the motor is connected to the first pole of the power supply via the third switch element, and is connected to the second pole of the power supply via the fourth switch element; in the first execution position, the motor is connected to the first end of the first switch element via the third switch element, and is connected to the first end of the second switch element via the fourth switch element, and in the first manual position, the second end of the first switch element and the second end of the second switch element are respectively connected to the second pole of the power supply, in the second manual 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 manual 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.

[0011] In an embodiment according to the present utility model, the first switch element and the second switch element are constructed as normally open and normally closed micro switches, and the third switch element and the fourth switch element are constructed as normally open and normally closed relays, wherein the first manual 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.

[0012] In an embodiment of the present invention, in the second execution position, the motor rotates forward; in the first execution position, in the second manual control position, the motor rotates forward, and in the third manual control position, the motor rotates reversely.

[0013] In an embodiment according to the utility model, the motor control system also includes a limit switch connected between the motor and the anti-pinch execution switch, the limit switch includes 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.

[0014] In an embodiment according to the present invention, the fifth switch element and the sixth switch element are constructed as normally closed micro switches, and the fifth switch element is disconnected only when the first limit position of the movable sofa is reached, and the sixth switch element is disconnected only when the second limit position of the movable sofa is reached.

[0015] The utility model also provides a movable sofa, which comprises: a motor control system according to the above embodiment of the utility model, a sofa body and a foot lift, wherein the forward rotation of the motor causes the foot lift to be lifted, and the reverse rotation of the motor causes the foot lift to be retracted. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following is a brief introduction to the drawings required for the description of the embodiments. Obviously, the drawings described below are only some exemplary embodiments of the present utility model, and for ordinary technicians in this field, other embodiments can be obtained based on these embodiments without creative work.

[0017] Figure 1 A schematic diagram of a movable sofa according to an embodiment of the utility model is shown.

[0018] Figure 2 shows a schematic circuit diagram of a motor control system according to an embodiment of the utility model,

[0019] Figure 3 A schematic circuit diagram of a first execution position and a second manual control position of a motor control system according to an embodiment of the utility model is shown.

[0020] Figure 4A schematic circuit diagram of a first execution position and a third manual control position of a motor control system according to an embodiment of the utility model is shown.

[0021] Figure 5 A schematic circuit diagram of a second execution position of a motor control system according to an embodiment of the utility model is shown.

[0022] Figure 6 A schematic block diagram of a motor control system according to an embodiment of the utility model is shown.

[0023] Figure 7 shows a schematic circuit diagram of an anti-pinch sensor according to an embodiment of the utility model, and

[0024] Figure 8 A schematic circuit diagram of a motor control system according to another embodiment of the utility model is shown. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the utility model more obvious, the exemplary embodiments of the utility model will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments of the utility model, and it should be understood that the utility model is not limited to the exemplary embodiments described here.

[0026] In this specification and the drawings, substantially the same or similar steps and elements are represented by the same or similar reference numerals, and repeated descriptions of these steps and elements will be omitted. At the same time, in the description of the present utility model, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance or ranking.

[0027] In this specification and the accompanying drawings, elements are described in singular or plural form, depending on the embodiment. However, the singular and plural forms are appropriately selected for the proposed situation only for the convenience of explanation and are not intended to limit the utility model to this. Therefore, the singular form may include the plural form, and the plural form may also include the singular form, unless the context clearly indicates otherwise. In the embodiment of the utility model, unless otherwise clearly stated, "connection" does not mean that it must be "directly connected" or "directly in contact", but only needs to be electrically connected.

[0028] Figure 1A schematic diagram of a movable sofa 100 according to an embodiment of the utility model is shown. The movable sofa 100 includes a sofa body 110 and a foot lift 120. The sofa body may include a sofa backrest 111, a sofa cushion 112, a sofa armrest 113 and a sofa side panel 114. In the utility model, the foot lift 120 is movable. For example, the foot lift 120 can be lifted to raise the user's legs, and can be retracted to lower the user's legs. In an embodiment of the utility model, the sofa backrest 111 is also movable, for example, the sofa backrest 111 can be laid down to allow the user to lie down to a certain extent, and the sofa backrest 111 can be erected to support the user sitting on the sofa 100. In an embodiment of the utility model, the sofa cushion 112 is also movable, for example, the sofa cushion 112 can move forward to match the laying down of the sofa backrest 111, and the sofa cushion 112 can move backward to match the standing up of the sofa backrest 111.

[0029] In the present invention, the movable sofa 100 also includes a motor control system. The above-mentioned actions can be achieved through the motor control system. The motor control system can use a motor to drive the actions of the foot lift 120, the sofa back 111 and / or the sofa cushion 112. For example, the motor control system can use the forward rotation of the motor to drive the foot lift 120 to lift, the sofa back 111 to fall down and / or the sofa cushion 112 to move forward, and the reverse rotation of the motor can drive the foot lift 120 to fold, the sofa back 111 to stand up and / or the sofa cushion 112 to move backward. In an embodiment according to the present invention, the user can control the above-mentioned actions, for example, through the control button 130 on the sofa 100. In another embodiment of the present invention, the motor control system can also use a motor to drive other components of the sofa 100 to move. The motor control system according to the present invention also has an anti-pinch function. For example, in the process of lifting or folding the foot lift 120, if a child or pet enters the foot lift area, there will be a risk of pinching. When such a pinching danger is sensed, the motor control system of the present invention can actively lift the foot lift 120 to avoid the danger. In another embodiment of the present invention, the motor control system according to the present invention can also be applied to other movable parts of the sofa, such as the sofa backrest 111 and / or the seat cushion for preventing pinching.

[0030] Figures 2 to 5A schematic circuit diagram of a motor control system 200 according to an embodiment of the utility model is shown. The motor control system 200 includes a motor M, a power source P, a manual switch 210, and an anti-pinch execution switch 220. The anti-pinch execution switch 220 can be switched between a first execution position and a second execution position. In the first execution position, the motor M is connected to the manual switch 210 through the anti-pinch execution switch 220, and the voltage polarity applied by the power source P to the motor M is changed by switching the manual switch 210. In the second execution position, the motor M is connected to the power source P through the anti-pinch execution switch 220, and the motor M rotates and drives the movable sofa to extend to achieve anti-pinch.

[0031] In an embodiment of the present invention, the motor M can be configured as a DC motor, and the power source P can be configured as a DC power source. In another embodiment, the motor M can be configured as an AC motor, and the power source P can be configured as an AC power source.

[0032] The first execution position and the second execution position of the anti-pinch execution switch 220 and the switching state of the manual switch 210 are Figures 2 to 5 is shown in detail.

[0033] exist Figures 2 to 5 In the illustrated embodiment, the manual switch 210 may include, for example, a first switch element S1 and a second switch element S2. The manual switch 210 is, for example, through the control button 130 of the movable sofa 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 may include, 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-position switches. The first switch element S1 and the second switch element S2 can switch between the first, second, and third manual control positions.

[0034] Figure 2 The initial states of the first, second, third, and fourth switching elements S1, S2, S3, and S4 are shown. Figure 2 As shown, the third switch element S3 and the fourth switch element S4 in the anti-pinch execution switch 220 are in the first execution position, that is, the motor M is connected to the first end of the first switch element S1 via the third switch element S3, and is connected to the first end of the second switch element S2 via the fourth switch element S4. The first switch element S1 and the second switch element S2 in the manual switch 210 are in the first manual control position, that is, the second end of the first switch element S1 and the second end of the second switch element S2 are respectively connected to the second pole (negative pole in the figure) of the power source P. Therefore, the motor M does not rotate, and the movable parts of the movable sofa 100 do not move.

[0035] Figure 3 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 the second manual control position. In the second manual control position, the second end of the first switch element S1 is connected to the first pole of the power source P (the positive pole in the figure), and the second end of the second switch element S2 is connected to the second pole of the power source P (the negative pole in the figure). In this case, the motor can, for example, rotate forward and drive the movable sofa 100 to extend, for example, the footrest 120 of the movable sofa 100 is lifted.

[0036] Figure 4 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 the third manual control position. In the third manual control position, the second end of the first switch element S1 is connected to the second pole of the power source P (the negative pole in the figure), and the second end of the second switch element S2 is connected to the first pole of the power source P (the positive pole in the figure). In this case, the motor M can, for example, reverse and drive the movable sofa 100 to retract, for example, the footrest 120 of the movable sofa 100 is folded.

[0037] Figure 5 The third switch element S3 and the fourth switch element S4 are shown in the second execution position. In the second execution position, the motor M is connected to the first pole (positive pole in the figure) of the power source P via the third switch element S3, and is connected to the second pole (negative pole in the figure) of the power source P via the fourth switch element S4. In the second execution position, the connection between the first switch element S1 and the second switch element S2 and the motor M is disconnected, so 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, rotate forward and drive the movable sofa 100 to extend, for example, the footrest 120 of the movable sofa 100 is lifted.

[0038] The second execution position corresponds to the anti-pinch function of the motor control system 200 according to the present invention. In the motor control system 200 according to the present invention, the first, second, third, and fourth switch elements S1, S2, S3, and S4 constitute the core of the control of the motor M. Compared with the prior art centered on the signal transmission of the control module, the motor control system 200 of the present invention has a simpler structure, higher robustness, and lower manufacturing cost.

[0039] In the embodiment of the utility model, the first switch element S1 and the second switch element S2 can be respectively configured as normally open and normally closed micro switches, and the third switch element S3 and the fourth switch element S4 can be respectively configured as normally open and normally closed relays. The first manual 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, Figure 2 The switching states shown are the normally closed positions of the first, second, third, and fourth switching elements S1 , S2 , S3 , and S4 .

[0040] When the user presses the first switch element S1, that is, the first switch element S1 switches from normally closed to normally open, the motor M can, for example, rotate forward and drive the movable sofa 100 to extend, for example, the foot lift 120 of the movable sofa 100 is lifted. When the user releases the first switch element S1, that is, the first switch element S1 switches from normally open back to normally closed, the motor M stops rotating forward, and the movable sofa 100 stops extending, for example, the foot lift 120 of the movable sofa 100 stops lifting.

[0041] When the user presses and holds the second switch element S2, that is, the second switch element S2 switches from normally closed to normally open, the motor M can, for example, reverse and drive the movable sofa 100 to contract, for example, the foot lift 120 of the movable sofa 100 is retracted. When the user releases the second switch element S2, that is, the second switch element S2 switches from normally open back to normally closed, the motor M stops reversing, and the movable sofa 100 stops contracting, for example, the foot lift 120 of the movable sofa 100 stops retracting.

[0042] In the embodiment according to the present invention, the action or state of the third switch element S3 and the fourth switch element S4 can be controlled by another control module, which will be described in detail later. When the other control module determines that there is a risk of pinching, it will send an action signal to the third switch element S3 and the fourth switch element S4, and the third switch element S3 is controlled to switch from normally closed to normally open, and the fourth switch element S4 is controlled to switch from normally closed to normally open. If the user is manually controlling the motor M to reverse, that is, the movable sofa 100 is contracted, and there is a risk of pinching, then the movable sofa 100 is forced to extend at this time, that is, the motor M is forced to rotate forward. If the user is manually controlling the motor M to rotate forward, that is, the movable sofa 100 is extended, then the movable sofa 100 continues to extend at this time, that is, the motor M continues to rotate forward normally.

[0043] The motor control system according to the utility model is realized by adding an anti-pinch execution switch 220, namely, a third switch element S3 and a fourth switch element S4, on the basis of the original manual switch 210, namely, the first switch element S1 and the second switch element S2. Since the third switch element S3 and the fourth switch element S4 are connected between the first switch element S1 and the second switch element S2 and the motor M in a normally closed state, the failure or ineffectiveness of the third switch element S3 and the fourth switch element S4 will not affect the normal control of the motor M of the movable sofa 100 by the first switch element S1 and the second switch element S2. When the anti-pinch function is required, the third switch element S3 and the fourth switch element S4 can be controlled to forcibly switch the working circuit of the motor M of the movable sofa 100, so as to achieve the anti-pinch effect of forcing the motor M to rotate forward.

[0044] Figure 6 FIG. 6 is a schematic block diagram of a motor control system 600 according to an embodiment of the present utility model. Figure 6 As shown in Figures 2 to 5 In addition to the motor control system 200 shown in , the motor control system 600 further includes an anti-pinch sensor 610, an anti-pinch signal receiver 620, and a control unit 630. When the anti-pinch sensor 610 is triggered, the anti-pinch sensor 610 sends a trigger signal to the anti-pinch signal receiver 620, the anti-pinch signal receiver 620 receives the trigger signal, the anti-pinch signal receiver 620 generates an anti-pinch signal according to the trigger signal and transmits it to the control unit 630, the control unit 630 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.

[0045] In combination with the embodiment in which the third switch element S3 and the fourth switch element S4 in the anti-pinch execution switch 220 are constructed as normally open and normally closed relays, when the third switch element S3 and the fourth switch element S4 receive the execution signal, Figures 2 to 4 The normally closed position is switched to Figure 5 Normally open position shown.

[0046] In another embodiment of the present invention, the motor control system 600 further includes a prompt unit 640, which Figure 6 The control unit 630 sends a prompt trigger signal to the prompt unit 640 according to the so anti-pinch signal, and the prompt unit 640 sends a prompt according to the prompt trigger signal. The prompt trigger signal can be, for example, an acoustic and / or optical prompt.

[0047] Figure 7A schematic circuit diagram of an anti-pinch sensor 610 according to an embodiment of the utility model is shown. The anti-pinch sensor 610 includes a trigger member 611, a trigger switch 612, a signal transmitter 613 and a sensor power supply 614. The trigger switch 612, the signal transmitter 613 and the sensor power supply 614 are connected in series and form a loop. When the trigger member 611 is not triggered, the trigger switch 612 is disconnected and the loop is open. When the trigger member 611 is triggered, the trigger switch 612 is turned on, the loop is powered on and the signal transmitter 613 transmits a trigger signal.

[0048] In an embodiment of the present invention, the trigger member 611 can be configured as a key or a button, for example. In this embodiment, a corresponding elastic element can be arranged so that the trigger member 611 does not apply force to the trigger switch 612 when it is not pressed. At this time, the trigger switch 612 remains off. Only when the trigger member 611 is pressed, the trigger switch 612 is turned on.

[0049] According to the embodiment of the present invention, the anti-pinch sensor 610 can ensure that the signal transmitter 613 is powered only when it is triggered, and when it is not triggered, the power consumption of the anti-pinch sensor 610 is zero. Therefore, the anti-pinch sensor 610 can achieve extremely low energy consumption. Therefore, the sensor power supply 614 can be designed to be smaller and more cost-effective.

[0050] In an embodiment of the present invention, the trigger signal may be transmitted from the anti-pinch sensor 610 to the anti-pinch signal receiver 620 in a wireless transmission manner. In this embodiment, the anti-pinch signal receiver 620 may have a pairing unit 621, which Figure 6 It is shown in a dotted box. Through the pairing unit 621, for example, a wireless communication connection can be established between the anti-pinch signal receiver 620 (its pairing unit 621) and the anti-pinch sensor 610 (its signal transmitter 613). In particular, for example, a wireless communication connection can be established between an anti-pinch signal receiver 620 and an anti-pinch sensor 610, that is, a one-to-one pairing of the anti-pinch signal receiver 620 and the anti-pinch sensor 610 is achieved. Alternatively, for example, a wireless communication connection can also be established between an anti-pinch signal receiver 620 and multiple anti-pinch sensors 610, that is, a one-to-many pairing of the anti-pinch signal receiver 620 and the anti-pinch sensor 610 is achieved. The above-mentioned one-to-one pairing or one-to-many pairing can prevent signal crosstalk between multiple anti-pinch signal receivers.

[0051] The anti-pinch sensor 610, especially the signal transmitter 613, may have a first communication unit, and the anti-pinch signal receiver 620 may have a second communication unit. Before the first connection, the first communication unit and the second communication unit may communicate with each other to establish a wireless signal transmission path. The anti-pinch sensor 610, especially the signal transmitter 613, may have an encoding unit, and the anti-pinch signal receiver 620 may have a decoding unit. The encoding unit may send a signal using the wireless signal transmission path, and the decoding unit may receive the signal, decode the signal, and generate a trigger signal.

[0052] In an embodiment according to the utility model, the anti-pinch sensor 610 can be arranged on the lower side or inner side of the foot lift 120 of the movable sofa 100, for example. When the foot lift 120 is folded and touches an object or an animal, the anti-pinch sensor 610 arranged in this way can be easily triggered, thereby avoiding the risk of pinching. In another embodiment, the anti-pinch sensor 610 can also be arranged on other movable parts of the movable sofa 100, for example, on the sofa backrest 111 and / or the sofa cushion 112, to avoid the risk of pinching. The anti-pinch sensor 610 can also be arranged on other non-movable parts of the movable sofa 100, for example, on the sofa armrest 113 and / or the sofa side panel 114.

[0053] Figure 8 FIG. 8 is a schematic circuit diagram of a motor control system 800 according to another embodiment of the present invention. Figures 2 to 5 The motor control system 200 shown in FIG. Figure 8 The motor control system 800 shown in the figure additionally has a limit switch 810, which is connected between the motor M and the anti-pinch execution switch 220, for example, between the motor M and the third open 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 with the fifth switch element S5, the second diode D2 is connected in parallel with the sixth switch element S6, and the first diode D1 and the second diode D2 have opposite conduction directions. In an embodiment according to the present utility model, the fifth switch element S5 and the sixth switch element S6 can be constructed as a normally closed micro switch, for example, and the fifth switch element S5 is disconnected (normally open position) only when the first limit position of the movable sofa 100 is reached, and the sixth switch element S5 is disconnected (normally open position) only when the second limit position of the movable sofa 100 is reached.

[0054] In the embodiment according to the present invention, for example, when the motor M is applied with a forward voltage / current (which is Figure 8The motor rotates forward and drives the movable sofa 100 to extend, for example, the footrest 120 to lift. When the motor M is applied with a reverse voltage / current (which is in Figure 8 ), the motor reverses and drives the movable sofa 100 to retract, for example, the footrest 120 is folded. When the extension or contraction of the movable sofa 100 reaches the maximum limit, it is necessary to limit the further movement of the movable sofa to avoid damage to the mechanical parts of the movable sofa 110, such as the movable bracket and the electrical parts, such as 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 so that its conduction direction is consistent with the forward voltage / current direction, and the second diode D2 is arranged so that its conduction direction is consistent with the reverse voltage / current direction.

[0055] In this embodiment, when the motor M rotates forward and the movable sofa 100 reaches the maximum extension, that is, reaches the second limit position, the sixth switch S6 is switched from on (normally closed position) to off. Under the effect of the unidirectional conduction of the second diode D2, the forward current cannot flow through the motor M, but the reverse current can flow through the motor M, that is, the motor M can no longer rotate forward but can reverse. This limits the excessive extension of the movable sofa 100 and allows the contraction of the movable sofa 100. After the movable sofa 100 leaves the second limit position, the sixth switch S6 is switched from off to on.

[0056] When the motor M reverses and the movable sofa 100 reaches the maximum contraction degree, that is, reaches the first limit position, the fifth switch S5 is switched from on (normally closed position) to off. Under the effect of the unidirectional conduction of the first diode D1, the reverse current cannot flow through the motor M, but the forward current can flow through the motor M, that is, the motor M can no longer reverse but can rotate forward. This limits the excessive contraction of the movable sofa 100 and allows the extension of the movable sofa 100. After the movable sofa 100 leaves the first limit position, the fifth switch S6 is switched from off to on.

[0057] The block diagrams of the circuits, units, devices, apparatuses, equipment, and systems involved in the present utility model are only illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As will be appreciated by those skilled in the art, these circuits, units, devices, apparatuses, equipment, and systems may be connected, arranged, and configured in any manner as long as the desired purpose can be achieved. The circuits, units, devices, and apparatuses involved in the present utility model may be implemented in any suitable manner, such as by using a dedicated integrated circuit, a field programmable gate array (FPGA), etc., or by using a general-purpose processor in combination with a program.

[0058] Those skilled in the art should understand that the above-mentioned specific embodiments are merely examples and not limitations, and various modifications, combinations, partial combinations and replacements may be made to the embodiments of the utility model according to design requirements and other factors. As long as they are within the scope of the attached claims or their equivalents, they belong to the scope of rights to be protected by the utility model.

Claims

1. A motor control system for a movable sofa, characterized in that: The motor control system comprises: Motor, power supply, manual switch and anti-pinch actuator 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 manual switch through the anti-pinch execution switch, and the voltage polarity applied by the power supply to the motor is changed by switching the manual switch; and In the second execution position, the motor is connected to the power supply through the anti-pinch execution switch, and the motor rotates and drives the movable sofa to extend to achieve anti-pinch. The anti-pinch execution switch includes two switch elements, the two switch elements are respectively connected to two ends of the motor, and the motor is constructed as a DC motor.

2. The motor control system according to claim 1, characterized in that: The motor control system further includes: an anti-pinch sensor, an anti-pinch signal receiver and a control unit. Wherein, when 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.

3. The motor control system according to claim 2, characterized in that: The anti-pinch sensor comprises: Trigger, trigger switch, signal transmitter and sensor power supply, Wherein, the trigger switch, the signal transmitter and the sensor power supply are connected in series to form a loop, Wherein, when the trigger element is not triggered, the trigger switch is disconnected and the circuit is broken; when the trigger element is triggered, the trigger switch is connected, the circuit is energized and the signal transmitter transmits the trigger signal.

4. The motor control system according to claim 2, characterized in that: The motor control system further includes a prompting unit, The control unit sends a prompt trigger signal to the prompt unit according to the anti-pinch signal, and the prompt unit sends a prompt according to the prompt trigger signal.

5. The motor control system according to claim 2, characterized in that: The anti-pinch signal receiver has a pairing unit, which is used to establish a wireless communication connection between one of the anti-pinch signal receivers and one or more of the anti-pinch sensors.

6. The motor control system according to claim 1, characterized in that: The manual switch includes a first switch element and a second switch element, the manual switch can be switched between a first, a second and a third manual position, the anti-pinch execution switch includes a third switch element and a fourth switch element, and the first, second, third and fourth switch elements are configured as single-pole double-set switches, and wherein, - in the second execution position, the electric motor is connected to a first pole of the power supply via the third switching element and to a second pole of the power supply via the fourth switching element; - in the first actuating position, the motor is connected to the first end of the first switching element via the third switching element and to the first end of the second switching element via the fourth switching element, and - in a first manual control position, the second end of the first switching element and the second end of the second switching element are respectively connected to the second pole of the power supply, - 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 control 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 according to claim 6, characterized in that: 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. The first manual 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 a normally closed position of the third switching element and the fourth switching element.

8. The motor control system according to claim 6, characterized in that: In the second execution position, the motor rotates forward; In the first execution position, - in the second manual position, the motor rotates forward, and In the third manual control position, the motor rotates in the reverse direction.

9. The motor control system according to claim 1, characterized in that: The motor control system further includes a limit switch connected between the motor and the anti-pinch execution switch, and the limit switch includes a fifth switch element, a sixth switch element, a first diode and a second diode, 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.

10. The motor control system according to claim 9, characterized in that: The fifth switch element and the sixth switch element are configured as normally closed micro switches, and The fifth switch element is opened only when the first limit position of the movable sofa is reached, and the sixth switch element is opened only when the second limit position of the movable sofa is reached.

11. A movable sofa, characterized in that: The movable sofa comprises: The motor control system according to any one of claims 1 to 10, Sofa body, and Lift your feet. Among them, the forward rotation of the motor causes the foot lift to be lifted, and the reverse rotation of the motor causes the foot lift to be retracted.

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