Anti-pinch device, anti-pinch system and movable furniture unit

Abstract

The utility model provides an anti-pinch device. The anti-pinch device comprises a fixed base with a containing cavity; the movable top cover can move relative to the fixed base under the action of external force; the at least one detection device is constructed to be used for detecting the displacement of the movable top cover relative to the fixed base, and the detection device is constructed to be a microswitch and comprises a base body fixed in the containing cavity and a triggering piece capable of moving relative to the base body; the displacement of the movable top cover relative to the fixed base causes the displacement of the triggering piece relative to the base body. In addition, the utility model further provides an anti-pinch system and a movable furniture unit.

Description

Technical Field

[0001] The utility model relates to an anti-pinch device, an anti-pinch system and a movable furniture unit comprising the anti-pinch device or the anti-pinch system. Background Art

[0002] With the improvement of living standards, people's demands for furniture products have become more and more refined. Not only do they expect furniture products to have more and more diverse functions, but they also put forward more and more 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 the user's diverse needs for seat postures.

[0003] The electric actuator drives the movement of each movable unit so that the electric sofa can be changed between at least two postures, namely, sitting posture, TV posture and lying posture. However, in the "extended" position such as TV posture or lying posture, the movable unit is spread out away from the sofa base, for example, the space between the footrest of the leg unit and the sofa base is exposed to the outside, and foreign objects may enter the 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 the space by mistake, it may be caught in the process of the sofa resetting movement, resulting in casualties of the pet or a person.

[0004] In order to avoid this hazard, various preventive measures have been taken. In some existing designs, protective plates are added to the moving parts to close the passage from the outside to the inside at the moving parts to prevent foreign objects or living things from entering the area where clamping may occur. However, in this design, the added protective plates will not only hinder the freedom of movement of the furniture product, increase the structural space required for its installation, but also have an adverse effect on the appearance; in some existing designs, capacitive or infrared sensing devices are used to detect foreign objects or living things entering the risk area of ​​clamping. However, in this design, the capacitive or infrared sensing device not only has a large measurement error and an unstable working state, but also has a complex connection relationship and high energy consumption. Utility Model Content

[0005] In view of this, the technical problem to be solved by the present invention is how to provide an anti-pinch device with simple structure, high safety, stable function and low energy consumption.

[0006] In order to solve the technical problem, an anti-pinch device is provided, comprising:

[0007] A fixed base with a receiving cavity;

[0008] a movable top cover, the movable top cover being displaceable relative to the fixed base under the action of an external force; and

[0009] at least one detection device configured to detect the displacement of the movable top cover relative to the fixed base,

[0010] The detection device is configured as a micro switch and includes a base fixed in the accommodating cavity and a trigger member displaceable relative to the base, and displacement of the movable top cover relative to the fixed base causes displacement of the trigger member relative to the base.

[0011] According to the utility model, when an external force acts on the movable top cover, the movable top cover is displaced relative to the fixed base, and the displacement of the movable top cover relative to the fixed base causes the trigger of the micro switch to be displaced relative to its base. Thus, the micro switch responds to the external force in a mechanical manner, ensuring sufficient sensitivity and working reliability of the detection function.

[0012] In a preferred embodiment, the movable top cover includes an action section for bearing external force, wherein the action section includes an inner surface facing the detection device and an outer surface facing the outside of the anti-pinch device, wherein the outer surface is at least partially constructed in an arc-shaped convex manner.

[0013] In this case, the outer surface of the movable top cover for receiving the external force has an arc-shaped convex structure at least partially. Compared with the outer surface of a purely flat structure, this design can not only sensitively sense the external force parallel to the displacement direction of the movable top cover, but also can equally sensitively sense the external force at an angle to the displacement direction of the movable top cover or even in all directions. This further improves the detection sensitivity and the reliability of the anti-pinch function.

[0014] In a preferred embodiment, the outer surface is designed to be mirror-symmetrical.

[0015] In a preferred embodiment, the fixed base and the movable top cover extend longitudinally and parallel to each other, wherein an end cover is provided at the end of the fixed base. As a component for receiving external force, the movable top cover can transmit the external force to at least one detection device in the accommodating cavity within a maximum range, thereby improving the reliability and sensitivity of the anti-pinch function. In addition, the end cover is provided at the end of the fixed base, so as to be arranged adjacent to the movable top cover, so that the movable top cover can be guided in a directional manner when the movable top cover is displaced relative to the fixed base.

[0016] In a preferred embodiment, the trigger member includes a trigger member top end, and the trigger member top end is in contact with the inner surface of the action section.

[0017] Preferably, the upper end of the trigger member contacts the inner surface of the action section, so that when the movable top cover is displaced relative to the fixed base, the displacement can be sensitively converted into the position of the trigger member relative to the base.

[0018] In a preferred embodiment, the top end of the trigger member comprises a convex curved surface. Particularly preferably, the top end of the trigger member is configured in a dome shape.

[0019] In a preferred embodiment, the inner surface includes a receiving groove, and the top end of the trigger member is received in the receiving groove.

[0020] In a preferred embodiment, the trigger member top end is at least partially accommodated in the accommodation groove with a spacing therebetween.

[0021] In this design, the top of the upper end portion is in contact with the receiving groove, while the circumferential region of the upper end portion can maintain a certain distance from the receiving groove. On the one hand, whether the force applied by the movable top cover to the upper end portion of the trigger member is parallel to the displacement direction of the trigger member relative to the base, the normal operation of the trigger member can be reliably caused. The reliability and sensitivity of the anti-pinch function are improved; on the other hand, a gap is left between the circumferential region of the upper end portion and the receiving groove, avoiding false triggering caused by normal vibration of the movable top cover and / or external components.

[0022] In a preferred embodiment, the accommodating cavity includes cavity lateral walls opposite to each other, wherein the movable top cover also includes a top cover lateral wall extending from the action section toward the fixed base, wherein the cavity lateral wall and the top cover lateral wall are respectively clamped to each other with their free ends.

[0023] The mutual snap connection between the lateral wall of the cavity and the lateral wall of the top cover can be achieved in a variety of ways, for example, by respectively providing mutually opposing hooks at the free ends of the lateral wall of the cavity and the free ends of the lateral wall of the top cover, or by providing mutually cooperating hooks and grooves at the free ends of the lateral wall of the cavity and the lateral wall of the top cover, or by providing a guide groove in the lateral wall of the cavity and a pin at the free end of the lateral wall of the top cover that can cooperate with the guide groove.

[0024] In a preferred embodiment, the fixed base and the movable top cover extend longitudinally and parallel to each other, wherein an end cover is provided at the end of the fixed base. As a component for receiving external force, the movable top cover can transmit the external force to at least one detection device in the accommodating cavity within a maximum range, thereby improving the reliability and sensitivity of the anti-pinch function. In addition, the end cover is provided at the end of the fixed base, so as to be arranged adjacent to the movable top cover, so that the movable top cover can be guided in a directional manner when the movable top cover is displaced relative to the fixed base.

[0025] In order to solve the technical problem, the utility model also provides an anti-pinch system, which includes the above-mentioned anti-pinch device, a controller and an electric actuator that are communicatively connected to the anti-pinch device.

[0026] In a preferred embodiment, the anti-pinch device is wirelessly connected to the controller.

[0027] As a result, the wired connection between the anti-pinch device and the controller and the electric actuator is eliminated. This not only simplifies the connection method and makes the device structure simpler, but also eliminates the distance limitation between the anti-pinch device and the controller and the electric actuator caused by the conductive wire, thereby increasing the design freedom and allowing the anti-pinch device to be arranged at any desired position according to needs.

[0028] In a preferred embodiment, when the detection device detects the displacement of the movable top cover relative to the fixed base, the anti-pinch device sends an output signal to the controller, and the controller interrupts the operation of the electric actuator or causes the electric actuator to reverse based on the output signal.

[0029] In order to solve the technical problem, the utility model also provides a movable furniture unit, which includes the above-mentioned anti-pinch device or anti-pinch system.

[0030] In a preferred embodiment, the furniture unit comprises:

[0031] first component;

[0032] a second component movable relative to the first component, wherein the anti-pinch device is arranged on the second component; and

[0033] An electric actuator is configured to cause the second component to move relative to the first component so that the furniture unit can be transformed between a folded position and an extended position, wherein a distance between the second component and the first component increases when the furniture unit is transformed from the folded position to the extended position.

[0034] In a preferred embodiment, the fixing base of the anti-pinch device is arranged on the second component, and the movable top cover faces the space between the second component and the first component in the extended position.

[0035] The first component and the second component may move relative to each other, which may cause a clamping between the two components. To this end, an anti-pinch device is arranged on at least one of the components to sensitively sense the contact between the component and a foreign object or a living being, such as a pet or a child. The first component may be a component that remains stationary relative to the ground, such as a base portion of a piece of furniture supported on the ground, or a component that moves during the activity of the furniture, such as a movable seat portion of an electric sofa.

[0036] In a preferred embodiment, the furniture unit is a seating unit. Preferably, the second component is a footrest of the seating unit.

[0037] However, in an alternative embodiment, the second component may also be a movable armrest portion or a backrest portion.

[0038] The furniture unit is certainly not limited to the seat unit, and movable beds may also be considered, wherein the first component may be a main bed body supported on the ground, and the second component may be a movable bed board or headboard that can be raised and lowered.

[0039] It should be noted here that the details and advantages described for the anti-pinch device also apply to an anti-pinch system and a furniture unit comprising such an anti-pinch device. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0041] Figure 1 An anti-pinch device according to an embodiment of the present utility model is schematically shown in a stereoscopic manner;

[0042] Figure 2 Schematically shown in a stereogram Figure 1 Some components of the anti-pinch device shown;

[0043] Figure 3 Schematically shown Figure 1 A cross section of the anti-pinch device shown;

[0044] Figure 4 Schematically shown in a stereogram Figure 1 A detection device for the anti-pinch device shown;

[0045] Figure 5 Schematically shown in side view Figure 4 The detection device shown;

[0046] Figure 6 Schematically shown Figure 3 A partial enlarged view of the cross section shown;

[0047] Figure 7 A block diagram schematically shows an anti-pinch system according to the present invention;

[0048] Figure 8 A furniture unit according to the invention is schematically shown. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0050] The term "one embodiment" or "embodiment" as referred to herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the utility model. In the description of the utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "top", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. Moreover, the terms "first", "second", etc. are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here.

[0051] In addition, it should be noted that the "front-to-back direction" mentioned in the present application refers to the extension direction of the leg extension device of the furniture unit, especially the seat unit. Specifically, the "front" refers to the direction toward the leg extension device, and the "rear" refers to the direction toward the backrest assembly. The "left-right direction" or "lateral direction" refers to the direction perpendicular to the "front-to-back direction" in the horizontal direction of the furniture unit, especially the seat unit. The "longitudinal extension direction" refers to the extension direction in which the anti-pinch device 2 has a significantly larger size than in the other two spatial directions. The "height direction" refers to the displacement direction of the movable top cover 22 of the anti-pinch device 2 relative to the fixed base 21, and also refers to the displacement direction of the trigger member 232 of the detection device 23 relative to the base 231.

[0052] Figure 1 The anti-pinch device 2 according to one embodiment of the present invention is schematically shown in a three-dimensional diagram. The anti-pinch device 2 is constructed to be longitudinally extended as a whole, that is, Figure 1As shown in FIG. 1 , the anti-pinch device 2 has a significantly larger dimension in the longitudinal extension direction x than in the other two spatial directions perpendicular to the longitudinal extension direction x. The anti-pinch device 2 includes a fixed base 21, a movable top cover 22 and Figure 1 At least one detection device not shown in the figure. End caps 24 are respectively arranged at the two ends of the anti-pinch device 2. Specifically, the fixed base 21 and the movable top cover 22 extend longitudinally and parallel to each other, wherein the end caps 24 are respectively fixedly connected to the two ends of the fixed base. Thus, the end caps 24 are arranged adjacent to the movable top cover 22, so as to form a directional guide for the movable top cover 22 when the movable top cover 22 moves relative to the fixed base 21.

[0053] Figure 2 A three-dimensional diagram of the anti-pinch device 2 is schematically shown. For the sake of clarity, the movable top cover 22 of the anti-pinch device 2 is removed to reveal its internal structure. Figure 3 A cross section of the anti-trap device 2 is then shown.

[0054] The fixing base 21 forms a receiving chamber 210 , and the receiving chamber 210 includes a housing bottom 211 and two cavity side walls 212 extending upward from the housing bottom 211 and facing each other.

[0055] The fixed base 21 and the movable top cover 22 can be constructed in a mirror-symmetrical manner in their respective cross sections. Preferably, the fixed base 21 and the movable top cover 22 can have a constant cross section in the longitudinal extension direction x. This allows them to be manufactured cost-effectively from plastic materials using a simple manufacturing process, such as an extrusion process.

[0056] One or more detection devices 23 are arranged between the movable top cover 22 and the fixed base 21. Figure 2 In the embodiment shown, the anti-pinch device 2 includes four detection devices 23. However, in the embodiment not shown, more or fewer detection devices can be provided as required. The detection device 23 is configured to detect the displacement of the movable top cover 22 relative to the fixed base 21.

[0057] In such Figure 4 and Figure 5 In the illustrated embodiment, the detection device 23 is configured as a micro switch.

[0058] like Figure 4As shown, the detection device 23 includes a base 231 and a trigger member 232. The base 231 is fixedly mounted in the accommodating cavity 210 relative to the fixed base 21, and the trigger member 232 is pin-shaped and includes a trigger member top 2321 protruding outward from the base 231 and a trigger member bottom opposite thereto and inserted into the base 231. The trigger member bottom end, which is not explicitly shown, is movably supported in the base 231. In particular, the trigger member bottom end can be elastically resetably supported in the base 231 by means of an elastic member, such as a tension spring or a spring leaf, so that it can overcome the elastic force of the elastic member under the action of an external force and move relative to the base 231 in the direction of the longitudinal axis L of the trigger member 232, that is, in the height direction z.

[0059] like Figure 6 As shown, the movable top cover 22 includes an action section 221 and two top cover side walls 222 extending downward from the action section 221 toward the fixed base 21 and facing each other. The action section 221 is constructed in a curved surface, wherein the action section 221 includes an inner surface 2211 facing the fixed base 21 and then facing the detection device 23 and an outer surface 2212 facing the outside of the anti-pinch device 2.

[0060] The fixed base 21 and the movable top cover 22 are mutually engaged. To this end, the top cover lateral wall 222 has a greater width than the cavity lateral wall 212 in the transverse direction y perpendicular to the longitudinal extension direction x, wherein a top cover hook 222 protruding toward the outside of the cavity lateral wall 212 is provided on the free end of the top cover lateral wall 222, and a housing hook 212a protruding toward the inside of the top cover lateral wall 222 is provided on the free end of the cavity lateral wall 212. The engagement between the fixed base 21 and the movable top cover 22 is achieved by the mutual cooperation between the housing hook 212a and the top cover hook 222.

[0061] When an external force is applied to the action section 221 of the movable top cover 22, the movable top cover 22 moves downward along the height direction z relative to the fixed base 21. The detection device 23 arranged in the accommodating cavity 21 of the fixed base 21 contacts the inner surface 2211 of the action section 221 of the movable top cover 22 with its trigger member top end 2321, so that when the movable top cover 22 moves relative to the fixed base 21 in a direction parallel to the longitudinal axis L, the trigger member 232 moves downward along the direction of the longitudinal axis L relative to the base 231.

[0062] In this case, if the action section 221 is constructed as a plane perpendicular to the height direction z, that is, a plane in the xy plane, then for the action force applied along the height direction z, the action section 221 with a plane structure can move downward very sensitively under the action of the external force. However, when the action force does not act along the height direction z, but is applied to the action section 221 at a certain angle relative to the height direction z, the action section 221 will not be able to respond sensitively enough.

[0063] For this reason, especially Figure 3 and Figure 5 As shown in the cross section of FIG. 2 , the action section 221 of the movable top cover 22 is configured to be arc-shaped and convex at least within an angle range of 180° on its outer surface 2212. Therefore, no matter whether the action force applied to the outer surface 2212 of the action section 221 is parallel to the height direction z, it can act on the outer surface 2212 with the highest efficiency, thereby reducing the threshold of the force required for the movable top cover 22 to react, that is, to produce a downward displacement. In an advantageous design, only a weight of 50g is required to make the downward displacement of the movable top cover 22 relative to the fixed base 21 sufficient to trigger the anti-pinch device 2.

[0064] In order to prevent the movable top cover 22 from being displaced too much downward relative to the fixed base 21 and damaging the detection device 23, an inwardly protruding top cover stopper 222b is provided on the top cover lateral wall 222 of the movable top cover 22. The distance between the top cover stopper 222b and the top cover hook 222a is larger than the height dimension of the shell hook 212a on the cavity lateral wall 212 of the fixed base 21, and the top cover stopper 222b can abut against the shell hook 212a, thereby limiting the displacement of the movable top cover 22 relative to the fixed base 21 within a safe range.

[0065] In an embodiment not shown, the mutual engagement between the cavity lateral wall and the top cover lateral wall can also be achieved in different ways. For example, a longitudinal guide groove extending in the height direction is provided on the cavity lateral wall 212, and an inwardly protruding pin is provided on the top cover lateral wall 222, wherein the pin can be movably inserted into the guide groove, thereby limiting the displacement of the movable top cover 22 relative to the fixed base 21 within a safe range.

[0066] Preferably, the trigger member top 2321 is also configured to be dome-shaped. To match this, a receiving groove 2211a is provided on the inner surface 2211 of the action section 221 of the movable top cover 22 that cooperates with it. The receiving groove 2211a can be configured as a recessed portion extending inward from the inner surface of the action section 2211, or can be defined by forming a limiting rib 2211b on the inner surface 2211, such as Figure 6As shown. The trigger member top 2321 is generally arranged in the receiving groove 2211a in a shape-fitting manner, so that the top of the trigger member top 2321 contacts the bottom of the receiving groove 2211a to ensure the sensitivity of the trigger member. At the same time, in order to prevent the anti-pinch device 2 from being overly sensitive so that normal vibration also causes the detection device 23 to be triggered, it is preferred to keep a certain distance between the circumferential section of the trigger member top 2321 and the receiving groove 2211a, so that normal working operation, such as normal vibration of the equipment using the anti-pinch device 2, will not cause the detection device 23 to be triggered in error.

[0067] In general, the displacement of the movable top cover 22 relative to the fixed base 21 pushes the displacement of the trigger member 232 relative to the base 231 , thereby triggering the detection device 23 , and further prompting the anti-pinch device 2 to send an output signal.

[0068] Figure 7 The functional block diagram of the anti-pinch system including the anti-pinch device 2 is schematically shown. Figure 8 A furniture unit 1 equipped with the anti-pinch system is schematically shown. Figure 7 and Figure 8 Introduce the function of anti-pinch system and its application in furniture units.

[0069] like Figure 7 As shown, the anti-pinch system includes an anti-pinch device 2, a controller 3 and an electric actuator 4, and optionally also includes an alarm device 5. Figure 8 In the embodiment shown, the furniture unit 1 is constructed as a movable seat unit, which includes a base 11 fixedly supported on the ground, and a leg extension device, a seat portion and a backrest assembly that are movable relative to the base 11. The electric actuator 4 is arranged at the base 11, and the electric actuator 4 causes the leg extension device, the seat portion and the backrest assembly to move relative to the base 11, so that the seat unit can be moved. Figure 1 The seat unit 10 can be changed between the sitting position shown, the TV position not specifically shown, and / or the lying position. In the folded position, i.e., the sitting position, the footrest 12 of the leg extension device is folded under the seat portion as the second component, and the distance between the footrest 12 as the second component and the base 11 as the first component is the smallest. In the extended position, i.e., the TV position or the lying position, the leg extension device together with its footrest 12 is extended forward, and the distance between the footrest 12 and the base 11 is increased, thereby forming a larger space between the footrest 12 and the base 11. Once a pet or a child enters this space, it is possible that the pet or the child will be stuck between the footrest and the base when the seat unit is reset from the TV position or the lying position to the sitting position.

[0070] To avoid the risk of being trapped, an anti-trapping device 2 is installed on the bottom side of the footrest 12. The anti-trapping device 2 is arranged at a distance from the controller 3 and the electric actuator 4, and is connected to the controller 3 by wireless communication.

[0071] like Figure 1 As shown, the end cover 24 of the anti-pinch device 2 includes a mounting flange 241 extending outward in the longitudinal extension direction x, and a through hole for a bolt is provided on the mounting flange 241. The fixed base 21 of the anti-pinch device 2 is fixedly connected to the bottom side of the footrest 12 by means of the mounting flange 241 through a threaded connection, and the movable top cover 22 faces the space between the base 11 and the footrest 12, wherein the anti-pinch device 2 is arranged along the lateral direction of the front edge of the footrest 12. However, in an embodiment not shown, the anti-pinch device 2 can also be arranged at different positions of the furniture in different orientations as needed, for example, the anti-pinch device 2 can be arranged longitudinally at the two side edges of the bottom side of the footrest 12.

[0072] During the process of resetting the seat unit to the sitting position, the footrest 12 moves backwards toward the base 11 under the action of the electric actuator 4. During this period, when a pet or a child in the space between the footrest 12 and the base 11 touches the movable top cover 22 of the anti-pinch device 2, an external force is applied to the movable top cover 22, causing the movable top cover 22 to be displaced relative to the fixed base 21, and the displacement in turn causes the trigger member 232 of the detection device 23 to be displaced relative to the base 231. The anti-pinch device 2 thus detects the displacement of the trigger member 232 relative to the base 231, and accordingly sends an output signal to the controller 3 in a wireless manner. Based on the output signal, the controller 3 interrupts the operation of the electric actuator 4 or causes the electric actuator 4 to reverse, thereby preventing the footrest 12 from continuing to move toward the base 11, or causing the footrest 12 to move away from the base 11, so as to eliminate the risk of being pinched. At the same time, in the anti-pinch system including the alarm device 5 , a signal perceptible to the user, such as an alarm sound, a flashing light or a tactile alarm, will also be issued accordingly through the alarm device 5 .

[0073] Experiments show that, according to the embodiment of the present invention, from the time when the anti-pinch device 2 is hit until the electric actuator 4 stops operating, the moving distance of the movable top cover 22 relative to the fixed base 21 is only, for example, 2 mm.

[0074] It should also be noted here that Figure 8The furniture unit 1 according to the present invention is shown only as an example. In an embodiment not shown, when the furniture unit 1 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 the backrest 13 or the armrest 14 that is movable relative to the base 11; or the first component can be the armrest 14, and the second component can be the footrest 12 that is movable relative to the armrest 14.

[0075] Furthermore, the furniture unit 1 is not limited to Figure 8 In an embodiment not shown, the furniture unit 1 may also be a movable bed, and accordingly, the first component may be a main bed body fixedly supported on the ground, and the second component may be a movable bed board or bed head.

Claims

1. An anti-pinch device, characterized in that: The anti-pinch device comprises: A fixed base with a receiving cavity; a movable top cover, the movable top cover being displaceable relative to the fixed base under the action of an external force; and at least one detection device configured to detect the displacement of the movable top cover relative to the fixed base, The detection device is configured as a micro switch and includes a base fixed in the accommodating cavity and a trigger member displaceable relative to the base, and displacement of the movable top cover relative to the fixed base causes displacement of the trigger member relative to the base.

2. The anti-pinch device according to claim 1, characterized in that: The movable top cover comprises an action section for bearing external force, wherein the action section comprises an inner surface facing the detection device and an outer surface facing the outside of the anti-pinch device, wherein the outer surface is at least partially constructed in an arc-shaped convex shape.

3. The anti-pinch device according to claim 2, characterized in that: The outer surface is designed in a mirror-symmetrical manner.

4. The anti-pinch device according to claim 2, characterized in that: The trigger member includes a trigger member top end, and the trigger member top end can contact the inner surface of the action section.

5. The anti-pinch device according to claim 4, characterized in that: The top end of the trigger member includes a convex curved surface.

6. The anti-pinch device according to claim 5, characterized in that: The triggering element has a dome-shaped top end.

7. The anti-pinch device according to claim 4, characterized in that: The inner surface comprises a receiving groove, and the top end of the trigger member is received in the receiving groove.

8. The anti-pinch device according to claim 7, characterized in that: The trigger member top end is at least partially accommodated in the accommodation groove with a spacing maintained.

9. The anti-pinch device according to claim 2, characterized in that: The accommodating cavity includes cavity lateral walls opposite to each other, wherein the movable top cover also includes a top cover lateral wall extending from the action section toward the fixed base, wherein the cavity lateral wall and the top cover lateral wall are respectively clamped to each other with their free ends.

10. The anti-pinch device according to claim 1, characterized in that: The fixed base and the movable top cover extend longitudinally and parallel to each other, wherein an end cover is arranged at the end of the fixed base.

11. An anti-pinch system, characterized in that: The anti-pinch system comprises the anti-pinch device according to any one of claims 1 to 10, a controller and an electric actuator communicatively connected to the anti-pinch device.

12. The anti-pinch system according to claim 11, characterized in that: The anti-pinch device is wirelessly connected to the controller.

13. The anti-pinch system according to claim 11, characterized in that: When the detection device detects the displacement of the movable top cover relative to the fixed base, the anti-pinch device sends an output signal to the controller, and the controller interrupts the operation of the electric actuator or causes the electric actuator to reverse based on the output signal.

14. A movable furniture unit, characterized in that: The furniture unit comprises the anti-pinch device according to any one of claims 1 to 10 or the anti-pinch system according to any one of claims 11 to 13.

15. The furniture unit according to claim 14, characterized in that The furniture unit comprises: first component; a second component movable relative to the first component, wherein the anti-pinch device is arranged on the second component; and An electric actuator is configured to cause the second component to move relative to the first component so that the furniture unit can be transformed between a folded position and an extended position, wherein a distance between the second component and the first component increases when the furniture unit is transformed from the folded position to the extended position.

16. The furniture unit according to claim 15, characterized in that The fixed base of the anti-pinch device is arranged on the second component, and the movable top cover faces the space between the second component and the first component in the extended position.

17. The furniture unit according to claim 15, characterized in that The furniture unit is a seating unit.

18. The furniture unit according to claim 17, characterized in that The second component is a footrest and / or a backrest and / or an armrest portion of the seating unit.

Images