Anti-pinch structure of electric seat

Abstract

The utility model belongs to the technical field of electric seats, and particularly relates to an electric seat anti-pinch structure which comprises a seat frame assembly, a foot rest supporting assembly, a foot rest assembly, an angle sensor, a shell and a base. The shell is arranged on the base, and the seat frame assembly is connected to the shell; the foot rest support assembly is telescopically connected to the seat frame assembly; the foot rest assembly is rotationally connected to the far end of the foot rest supporting assembly. The angle sensor is arranged on the foot rest assembly. The telescopic foot rest supporting assembly is arranged to drive the foot rest assembly to stretch out and draw back, the angle sensor is arranged to be used for detecting the angle change of the foot rest assembly from the horizontal state to the vertical state before the foot rest assembly touches the seat frame assembly, and it is indicated that the foot rest assembly touches the foreign matter. Therefore, when the existence of the obstacle is detected, the electric seat can stop the movement of the telescopic foot rest supporting assembly, and the anti-pinch effect is achieved.

Description

Technical Field

[0001] This utility model relates to the field of electric seat technology, and in particular to an anti-pinch structure for electric seats. Background Technology

[0002] Electric chairs are common in homes and offices. One of their main features is the addition of a footstool or footrest that extends from the retracted or stored position to elevate and support the legs and feet—a position often referred to in the art as the TV position. If the backrest reclines as the footstool or footrest moves to the extended position, it is called the reclining position. Unfortunately, when the footstool or footrest retracts from the extended position to the stored position, obstacles (such as the user's feet or legs) can sometimes become trapped between the retracting footstool or footrest and the chair. This can pose a potential injury to the user. Utility Model Content

[0003] The technical problem to be solved by this utility model is: in order to solve the technical problem that the footrest or footstool may trap obstacles when it is retracted in the prior art, this utility model provides an anti-pinch structure for electric seats, which can stop the movement of the retractable footrest or footstool when the presence of an obstacle is detected.

[0004] The technical solution adopted by this utility model to solve its technical problem is: an anti-pinch structure for electric seats, which includes: a base;

[0005] A housing, which is disposed on the base;

[0006] A seat frame assembly, which is retractably connected to the housing;

[0007] A footrest support assembly, which is telescopically connected to the seat frame assembly;

[0008] A footrest assembly, the footrest assembly being rotatably connected to the end of the footrest support assembly away from the seat frame assembly;

[0009] An angle sensor is disposed on the foot support assembly;

[0010] Specifically, when the footrest assembly is in the retracted position, it is vertical; when it is in the intermediate position, it is horizontal and its rear end touches the seat frame assembly; when it is in the fully extended position, it is horizontal and the footrest support assembly is fully extended; when it moves between the intermediate and fully extended positions, it remains horizontal; and when it moves from the intermediate position to the retracted position, it changes from horizontal to vertical. The angle sensor is used to sense the angle change of the footrest assembly from the fully extended position to the intermediate position.

[0011] The specific technical effect is as follows: The retractable footrest support assembly allows the footrest to extend and retract. An angle sensor detects the angle change of the footrest assembly from a horizontal to a vertical position before it contacts the seat frame assembly. This indicates that the footrest assembly has encountered an object. Upon detecting an obstacle (especially a human limb), the electric seat can stop or reverse the movement of the retractable footrest support assembly, providing an anti-pinch effect and preventing serious injury to the user or others near the electric seat. Specifically, the footrest assembly is rotatably connected to the footrest support assembly. During its normal retraction from the fully extended position to the intermediate position, the footrest assembly remains horizontal. If an obstacle exists between the footrest assembly and the seat frame assembly, the footrest assembly will encounter the obstacle and rotate, causing it to change from a horizontal to a tilted position. The angle sensor detects this angle change, indicating the presence of an obstacle.

[0012] Furthermore, it also includes: a sensor housing mounted on the rear surface of the footrest assembly, wherein the angle sensor is located within the sensor housing.

[0013] Furthermore, it also includes: a pivot structure mounted on the rear surface of the footrest assembly and located within the sensor housing, the pivot structure being rotatably connected through the sensor housing to one end of the footrest support assembly away from the seat frame assembly.

[0014] The specific technical effect is as follows: During the retraction process of the footrest assembly from the fully extended position to the middle position, the angle sensor starts to work to detect the rotation angle of the pivot structure, that is, to detect the change in the rotation angle of the footrest assembly. If the footrest assembly remains horizontal during the retraction process, it means that the retraction process is normal and no obstacle is detected. If the footrest assembly rotates during the retraction process, it means that the retraction process is abnormal and an obstacle is detected.

[0015] Furthermore, it also includes: multiple anti-pinch sensors, which are disposed on the footrest assembly.

[0016] The specific technical effect is as follows: During the process of the footrest assembly moving from the middle position to the retracted position, the anti-pinch sensor starts working, while the angle sensor stops working. If the anti-pinch sensor does not sense pressure during the rotation of the footrest assembly from a horizontal to a vertical position, it indicates that the retraction process is normal and no obstacle has been detected. If the anti-pinch sensor senses pressure during the rotation of the footrest assembly from a horizontal to a vertical position, it indicates that the retraction process is abnormal and an obstacle has been detected.

[0017] Furthermore, the plurality of anti-pinch sensors include a first set of anti-pinch sensors disposed on the rear surface of the footrest assembly.

[0018] The specific technical effect is: to detect whether there are obstacles between the rear surface of the footrest assembly and the seat frame assembly.

[0019] Furthermore, the plurality of anti-pinch sensors include a second set of anti-pinch sensors, which are disposed on the side of the footrest assembly.

[0020] The specific technical effect is: to detect whether there are obstacles on the side of the footrest assembly.

[0021] Furthermore, the multiple anti-pinch sensors include a first set of anti-pinch sensors and a second set of anti-pinch sensors, the first set of anti-pinch sensors being disposed on the rear surface of the footrest assembly, and the second set of anti-pinch sensors being disposed on the side of the footrest assembly.

[0022] The specific technical effect is: to detect whether there are obstacles on the rear surface of the footrest assembly and between the side of the footrest assembly and the seat frame assembly.

[0023] Compared with the prior art, the beneficial effects of this utility model are:

[0024] (1) This utility model can drive the extension and retraction of the foot support component by setting a retractable foot support component, and set an angle sensor to detect the presence of obstacles by detecting the angle change of the foot support component, so as to achieve the anti-pinch effect.

[0025] (2) This utility model uses an anti-pinch sensor to detect whether the footrest assembly encounters an obstacle during the retraction process by detecting whether it is under pressure.

[0026] (3) By setting up a drive component and a controller, the electric seat can stop or reverse the movement of the retractable footrest support component when an obstacle is detected (especially when the obstacle is a human limb), thus achieving an anti-pinch effect and preventing serious injury to the seat user or other people near the electric seat. Attached Figure Description

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0028] Figure 1 This is a schematic diagram of the footrest assembly of this utility model in the retracted position;

[0029] Figure 2 This is a schematic diagram of the footrest assembly of this utility model located in the middle position;

[0030] Figure 3 This is a schematic diagram of the footrest assembly of this utility model in its fully extended position.

[0031] Figure 4 This is a structural diagram of the present invention when there is an obstacle between the footrest assembly and the seat frame assembly;

[0032] Figure 5 This is a schematic diagram of the rear surface of the footrest assembly of this utility model;

[0033] Figure 6 This is a schematic diagram of the pivot structure of this utility model.

[0034] In the diagram: 100, electric seat; 102, base; 104, housing; 106, footrest assembly; 108, footrest support assembly; 110, seat frame assembly; 112, sensor housing; 114, pivot structure; 116, rear surface; 118, obstacle; 120, first set of anti-pinch sensors; 122, second set of anti-pinch sensors. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0036] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0037] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] like Figures 1 to 6 The diagram shows the preferred embodiment of this utility model. The anti-pinch structure of the electric seat 100 in this embodiment includes a seat frame assembly 110, a footrest support assembly 108, a footrest assembly 106, an angle sensor, a housing 104, and a base 102. The housing 104 (including at least an armrest and backrest, not shown) is mounted on the base 102. The seat frame assembly 110 is retractably connected to the housing 104. The footrest support assembly 108 is retractably connected to the seat frame assembly 110. The footrest assembly 106 is rotatably connected to the end of the footrest support assembly 108 away from the seat frame assembly 110. The angle sensor is mounted on the footrest assembly 106.

[0039] In this embodiment, a drive assembly and a controller are provided inside the housing 104. The drive assembly is used to drive the seat frame assembly 110 and the foot support assembly 108 to extend and retract. The controller is used to control the start and stop of the drive assembly. The controller is connected to the angle sensor signal.

[0040] Therefore, when the angle sensor detects a change in angle, it sends a signal to the controller. The controller receives the signal and then sends a control signal to the drive component to control the drive component to stop or reverse, thereby stopping the movement of the retractable foot support component 108 and achieving an anti-pinch effect.

[0041] In this embodiment, the seat frame assembly 110 is telescopically connected to the housing 104 via a linkage assembly (not shown). That is, a drive assembly (not shown) drives the linkage assembly to move, thereby causing the seat frame assembly 110 to extend and retract. The footrest support assembly 108 is also telescopically connected to the seat frame assembly 110 via a linkage assembly (not shown). That is, a drive assembly (not shown) drives the linkage assembly to move, thereby causing the footrest support assembly 108 to extend and retract.

[0042] Among them, such as Figure 1 As shown, when the foot support assembly 106 is in the retracted position, the foot support assembly 106 is in a vertical state; as Figure 2 As shown, when the footrest assembly 106 is in the middle position, the footrest assembly 106 is horizontal and its rear end touches the seat frame assembly 110; Figure 3 As shown, when the footrest assembly 106 is in the fully extended position, the footrest assembly 106 is horizontal and the footrest support assembly 108 is fully extended; when the footrest assembly 106 moves between the intermediate position and the fully extended position, the footrest assembly 106 remains horizontal; when the footrest assembly 106 moves from the intermediate position to the retracted position, the footrest assembly 106 changes from the horizontal state to the vertical state. An angle sensor is used to sense the angle change of the footrest assembly 106 during the process from the fully extended position to the intermediate position.

[0043] Therefore, by setting a retractable footrest support assembly 108, the footrest assembly 106 can be extended and retracted. An angle sensor can detect the presence of an obstacle 118. When an obstacle 118 is detected (especially if it is a human limb), the electric seat 100 can stop the movement of the retractable footrest support assembly 108, achieving an anti-pinch effect and preventing serious injury to the seat user or others near the electric seat 100. Specifically, the footrest assembly 106 is rotatably connected to the footrest support assembly 108. During the normal retraction process from the fully extended position to the intermediate position, the footrest assembly 106 remains horizontal. If there is an obstacle 118 between the footrest assembly 106 and the seat frame assembly 110, the footrest assembly 106 will rotate upon contact with the obstacle 118, causing it to change from a horizontal to an inclined state. The angle sensor will detect this angle change, indicating the presence of the obstacle 118.

[0044] In this embodiment, refer to Figures 5 to 6As shown, an angle sensor is mounted on the pivot structure 114 to detect changes in the rotation angle of the pivot structure 114. Both the pivot structure 114 and the angle sensor are located inside the sensor housing 112, which is mounted on the rear surface 116 of the footrest assembly 106.

[0045] In this embodiment, refer to Figure 5 As shown, the first set of anti-pinch sensors 120 and the second set of anti-pinch sensors 122 are both strip-shaped. Multiple first set of anti-pinch sensors 120 are disposed on the rear surface 116 of the foot support assembly 106, and multiple second set of anti-pinch sensors 122 are disposed on the side of the foot support assembly 106.

[0046] In an embodiment not shown in the figures, when the seat frame assembly 110 adopts a soft-padded design, multiple first-group anti-pinch sensors 120 are only disposed on the lower portion of the rear surface 116 of the footrest assembly 106, and multiple second-group anti-pinch sensors 122 are only disposed on the lower portion of the side surface of the footrest assembly 106. This is because, during the rotation of the footrest assembly 106 from a horizontal to a vertical position, the upper portion of its rear surface 116 and side surface will contact the seat frame assembly 110 first, compared to the lower portion. If anti-pinch sensors 120 are also disposed on the upper portion of the footrest assembly 106 during its rotation, these sensors may misinterpret the presence of an obstacle when they come into contact with and are subjected to pressure on the seat frame assembly 110, when in fact it is not an obstacle. Therefore, to avoid the anti-pinch sensors 120 transmitting incorrect signals, we only disposed anti-pinch sensors 120 on the lower portion of the rear surface 116 and side surface of the footrest assembly 106.

[0047] In this embodiment, based on the structural principle of this utility model, the anti-pinch steps of the electric seat 100 are as follows:

[0048] Step 1, the first retraction process,

[0049] Reference Figures 3 to 2 As shown, during the retraction process of the footrest assembly 106 from the fully extended position to the middle position (a drive assembly not shown drives the linkage assembly to move, thereby causing the footrest support assembly 108 to retract, and at the same time a drive assembly not shown drives the linkage assembly to move, thereby causing the seat frame assembly 110 to retract), the angle sensor is in working condition, that is, it can detect the change in the rotation angle of the shaft.

[0050] Under normal circumstances, if the footrest assembly 106 remains horizontal during its retraction from the fully extended position to the middle position, it indicates that there is no obstruction 118.

[0051] At this time, if an obstacle 118 (such as a human limb, like a leg) is sandwiched between the front surface of the seat frame assembly 110 and the rear edge portion or the rear surface 116 near the rear edge portion, see Figure 4 As shown, when the rear edge portion or the rear surface 116 near the rear edge portion of the footrest assembly 106 comes into contact with a person's limb, the movement of the footrest support assembly 108 during the retraction process will effectively rotate the footrest assembly 106 from a horizontal state to an inclined state. This change in the angular direction of the footrest assembly 106 will then be detected by an angle sensor, which will then send a signal to a controller (not shown), which will then send a control signal to the drive assembly of the footrest support assembly 108 (not shown) to control the drive assembly to stop or reverse, thereby stopping the movement of the retractable footrest support assembly 108, achieving an anti-pinch effect, and thus effectively preventing serious injury to a person's limb.

[0052] Step two, the second retraction process,

[0053] Reference Figures 2 to 1 As shown, during the retraction process of the footrest assembly 106 from the middle position to the retracted position (a drive assembly not shown continues to drive the linkage assembly to move, thereby causing the footrest support assembly 108 to retract, while a drive assembly not shown continues to drive the linkage assembly to move, thereby causing the seat frame assembly 110 to retract), the operation of the angle sensor terminates (i.e., the angle sensor no longer detects the change in the rotation angle of the shaft), and then the anti-pinch sensor is in working state.

[0054] Under normal circumstances, the rear edge portion or the rear surface 116 near the rear edge portion of the footrest assembly 106 touches the front surface of the seat frame assembly 110 and rotates from a horizontal state to a vertical state. During this rotation, if the pressure sensor is not pressed, it indicates that there is no obstruction 118.

[0055] If the first set of anti-pinch sensors 120 and / or the second set of anti-pinch sensors 122 are pressed, it indicates the presence of an obstacle 118. This change in pressure on the footrest assembly 106 will then be detected by the first set of anti-pinch sensors 120 and / or the second set of anti-pinch sensors 122. Consequently, the first set of anti-pinch sensors 120 and / or the second set of anti-pinch sensors 122 will send a signal, which can then be transmitted to a controller (not shown). The controller will then send a control signal to the drive assembly of the footrest support assembly 108 (not shown) to control the drive assembly to stop or reverse, thereby stopping the movement of the retractable footrest support assembly 108 and achieving an anti-pinch effect, thus effectively preventing serious injury to a person's limbs.

[0056] In summary, compared with the prior art, the beneficial effects of this utility model are:

[0057] (1) This utility model can drive the extension and retraction of the footrest assembly 106 by setting the retractable footrest support assembly 108, and set the angle sensor to detect the presence of the obstacle 118 by detecting the angle change of the footrest assembly 106, so as to achieve the anti-pinch effect.

[0058] (2) This utility model uses an anti-pinch sensor to detect whether the footrest assembly 106 encounters an obstacle 118 during the retraction process by detecting whether it is under pressure.

[0059] (3) By setting up a drive component and a controller, when an obstacle 118 is detected (especially when the obstacle 118 is a human limb), the electric seat 100 can stop the movement of the retractable footrest support component 108, which has an anti-pinch effect, thereby preventing serious injury to the seat user or other people near the electric seat 100.

[0060] The above description is based on the preferred embodiments of this utility model. Through the above description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined by the scope of the claims.

Claims

1. An anti-pinch structure for an electric seat, characterized in that, include: Base (102); A housing (104) is disposed on the base (102); A seat frame assembly (110) is telescopically connected to the housing (104); A footrest support assembly (108) is telescopically connected to the seat frame assembly (110); A footrest assembly (106) is rotatably connected to the end of the footrest support assembly (108) away from the seat frame assembly (110); An angle sensor is disposed on the foot support assembly (106); Specifically, when the footrest assembly (106) is in the retracted position, the footrest assembly (106) is in a vertical state; when the footrest assembly (106) is in the intermediate position, the footrest assembly (106) is in a horizontal state and the rear end of the footrest assembly (106) touches the seat frame assembly (110); when the footrest assembly (106) is in the fully extended position, the footrest assembly (106) is in a horizontal state and the footrest support assembly (108) is fully extended; when the footrest assembly (106) moves between the intermediate position and the fully extended position, the footrest assembly (106) remains in a horizontal state; when the footrest assembly (106) moves from the intermediate position to the retracted position, the footrest assembly (106) changes from a horizontal state to a vertical state. The angle sensor is used to sense the angle change of the footrest assembly (106) during the process from the fully extended position to the intermediate position.

2. The electric seat anti-pinch structure as described in claim 1, characterized in that, Also includes: A sensor housing (112) is mounted on the rear surface (116) of the footrest assembly (106), and the angle sensor is located inside the sensor housing (112).

3. The electric seat anti-pinch structure as described in claim 2, characterized in that, Also includes: A pivot structure (114) is mounted on the rear surface (116) of the footrest assembly (106) and located inside the sensor housing (112). The pivot structure (114) passes through the sensor housing (112) and is rotatably connected to one end of the footrest support assembly (108) away from the seat frame assembly (110).

4. The electric seat anti-pinch structure as described in claim 1, characterized in that, Also includes: Multiple anti-pinch sensors are disposed on the footrest assembly (106).

5. The electric seat anti-pinch structure as described in claim 4, characterized in that, The plurality of anti-pinch sensors include a first set of anti-pinch sensors (120) disposed on the rear surface (116) of the footrest assembly (106).

6. The electric seat anti-pinch structure as described in claim 4, characterized in that, The multiple anti-pinch sensors include a second set of anti-pinch sensors (122), which are disposed on the side of the footrest assembly (106).

7. The electric seat anti-pinch structure as described in claim 4, characterized in that, The multiple anti-pinch sensors include a first set of anti-pinch sensors (120) and a second set of anti-pinch sensors (122). The first set of anti-pinch sensors (120) is disposed on the rear surface (116) of the foot support assembly (106), and the second set of anti-pinch sensors (122) is disposed on the side of the foot support assembly (106).

Images