Electric seat based on double sensing systems and electric leg support swing anti-pinch control method thereof

Abstract

The invention provides an electric seat based on a double-sensing system and an electric leg support swing anti-pinch control method thereof.The electric seat comprises a seat body, a seat support, an electric leg support, a leg support driving induction mechanism and an anti-pinch sensing assembly, and the anti-pinch sensing assembly is installed on the electric leg support; the anti-pinch sensing assembly is provided with a first sensor and a second sensor, the anti-pinch sensing assembly is provided with a bottom plane and an inclined plane, one sensor is located on the bottom plane, and the other sensor is located on the inclined plane, so that when the leg support driving sensing mechanism controls the electric leg support to swing, the first sensor and the second sensor are matched with each other; the anti-pinch sensing assembly is arranged to detect whether an object exists below the electric leg support, and when the first sensor or the second sensor detects the object, the anti-pinch mechanism is triggered to prevent the electric leg support from continuously swinging, so that the arrangement of the anti-pinch sensing assembly can play a role in preventing pinching, and the use safety of the electric seat is ensured.

Description

Technical Field

[0001] The present disclosure relates to the technical field of electric seats, and in particular to an electric seat based on a dual-sensing system and an electric leg rest swing anti-pinch control method thereof. Background Art

[0002] Electric chairs are a type of leisure chair that can meet people's various needs such as sitting, lying and reclining, and provide people with a comfortable use experience. Among them, electric chairs equipped with electric leg rests are deeply favored by users because they can provide leg support and relaxation functions. This type of chair can flexibly adjust the swing angle of the leg rest through an electric mechanism to adapt to users of different body shapes and sitting posture preferences, greatly improving the comfort and convenience of use, such as existing patents CN212815296U, CN221430711U, etc.

[0003] At present, when adjusting the swing angle of the leg rest of an electric seat with a leg rest, if there is an object just below the leg rest, such as a pet moving at the bottom of the leg rest, or a person putting his hand under the leg rest due to improper operation or curiosity, the leg rest may come into contact with these objects during the closing process and be clamped due to the structural design of the seat itself. This clamping effect may cause damage to the object, such as pinching a person's hand, other parts of the human body or a pet, etc., making the existing electric seats a safety hazard.

[0004] Therefore, the electric seat needs to add an anti-pinch structure so that the anti-pinch structure can prevent the leg rest from pinching objects when adjusted. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide an electric seat based on a dual sensing system and an anti-pinch control method for an electric leg rest swing, which adopts dual sensing to prevent injury from being pinched by objects.

[0006] The purpose of this disclosure is achieved through the following technical solutions:

[0007] An electric chair based on a dual-sensing system comprises a seat body, a seat bracket, an electric leg rest, a leg rest driving sensing mechanism and an anti-pinch sensing component, wherein the seat bracket is connected to the bottom of the seat body; the electric leg rest is movably connected to one side of the seat body; the leg rest driving sensing mechanism is installed at the bottom of the seat body, the input end of the leg rest driving sensing mechanism is used to connect to an external power supply, and the control output end of the leg rest driving sensing mechanism is electrically connected to the electric leg rest so that an adjustable swinging area is formed between the electric leg rest and the side of the seat body; the anti-pinch sensing component is installed on a side of the electric leg rest facing the seat bracket, and the anti-pinch sensing component has a bottom plane and an inclined surface, and the bottom plane is located at The anti-pinch sensor component is located on a side close to the leg rest drive sensing mechanism, and the inclined surface is located on a side of the anti-pinch sensor component away from the leg rest drive sensing mechanism. The anti-pinch sensor component is provided with a first sensor and a second sensor. The first sensor is located on the bottom plane, and the second sensor is located on the inclined surface. The sensing collection end of the leg rest drive sensing mechanism is electrically connected to the first sensor and the second sensor respectively. The first sensor is used to gradually weaken the sensing sensitivity when the electric leg rest swings downward, and gradually increase the sensing sensitivity when it swings upward. The second sensor is used to gradually increase the sensing sensitivity when the electric leg rest swings downward, and gradually weaken the sensing sensitivity when it swings upward.

[0008] In one embodiment, the angle formed between the extension line of the bottom plane and the extension line of the inclined surface is 40-50°.

[0009] In one embodiment, an angle formed between an extension line of the bottom plane and an extension line of the inclined surface is 45°.

[0010] In one of the embodiments, the angle range of the swing area is 0-90°.

[0011] In one embodiment, the first sensor includes a first sensor panel and a first sensor component, the first sensor panel is located in the inner cavity of the anti-pinch sensor assembly, the output end of the first sensor panel is electrically connected to the first sensor component, the control output end of the leg rest drive sensing mechanism is electrically connected to the input end of the first sensor panel, the sensing acquisition end of the first sensor component is electrically connected to the data receiving end of the first sensor panel, and the first sensor component is located on the bottom plane.

[0012] In one embodiment, the anti-pinch sensor component is provided with a first through hole, the first through hole is connected to the inner cavity of the anti-pinch sensor component, the first through hole is located on the bottom plane, and the first sensor component is passed through the first through hole.

[0013] In one embodiment, the second sensor includes a second sensor panel and a second sensor component, the second sensor panel is located in the inner cavity of the anti-pinch sensor assembly, the output end of the second sensor panel is electrically connected to the second sensor component, the control output end of the leg rest drive sensing mechanism is electrically connected to the input end of the second sensor panel, the sensing acquisition end of the second sensor component is electrically connected to the data receiving end of the second sensor panel, and the second sensor component is located on the inclined surface.

[0014] In one embodiment, the anti-pinch sensor component is provided with a second through hole, the second through hole is communicated with the inner cavity of the anti-pinch sensor component, the second through hole is located on the inclined surface, and the second sensor component is passed through the second through hole.

[0015] A method for controlling the swinging anti-pinching of an electric leg rest of an electric seat based on a dual-sensor system is implemented by using the electric seat based on a dual-sensor system described in any one of the above embodiments to adjust a predetermined angle formed between the electric leg rest and the side of the seat body within the swinging area. The method for controlling the swinging anti-pinching of the electric leg rest comprises the following steps:

[0016] Obtain the swing angle of the electric leg rest;

[0017] Acquire a swing angle increment according to the swing angle;

[0018] Detecting whether the swing angle increment is greater than a preset angle increment;

[0019] When the swing angle increment is greater than the preset angle increment, the sensing light flux of the first sensor is increased, and the sensing light flux of the second sensor is reduced.

[0020] In one embodiment, the step of detecting whether the swing angle increment is greater than a preset angle increment further includes:

[0021] When the swing angle increment is less than the preset angle increment, the sensing light flux of the second sensor is increased, and the sensing light flux of the first sensor is reduced.

[0022] Compared with the prior art, the present invention has at least the following advantages:

[0023] 1. The above-mentioned electric seat based on the dual sensing system adopts an anti-pinch sensor component, which has a first sensor and a second sensor, that is, a dual sensor is adopted, where one sensor is located on the bottom plane and the other sensor is located on the inclined plane. This enables the first sensor and the second sensor to cooperate with each other when the leg rest drive sensing mechanism controls the swing of the electric leg rest to detect whether there are objects under the electric leg rest, such as pets, human hands or other foreign objects. When the first sensor or the second sensor detects the above objects, the anti-pinch mechanism is triggered to prevent the electric leg rest from continuing to swing. Therefore, the setting of the anti-pinch sensor component can prevent pinching injuries and ensure the safety of the electric seat.

[0024] 2. When the electric leg rest swings, the leg rest drive sensing mechanism will monitor the swing direction of the electric leg rest. If the electric leg rest swings away from the seat body, the sensing sensitivity of the first sensor will be gradually increased, the sensing sensitivity of the second sensor will be gradually reduced, and the second sensor will be turned off when it swings to the maximum angle to prevent the second sensor from erroneously triggering the anti-pinch mechanism. If it swings toward the seat body, the sensing sensitivity of the second sensor will be gradually increased, the sensing sensitivity of the first sensor will be gradually reduced, and the first sensor will be turned off when it is fully retracted to prevent the first sensor from erroneously triggering the anti-pinch mechanism. In this way, when the electric leg rest swings, the first sensor and the second sensor can cooperate well to normally identify whether there is an object under the electric leg rest. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 is a schematic diagram of the structure of an electric seat based on a dual-sensing system in one embodiment;

[0027] Figure 2 for Figure 1 The schematic diagram of the structure of the anti-pinch sensor assembly in the electric seat shown;

[0028] Figure 3 for Figure 2 The structure diagram of the anti-pinch sensor assembly shown in another angle;

[0029] Figure 4 for Figure 2 A structural cross-sectional view of the anti-pinch sensor assembly shown;

[0030] Figure 5 for Figure 1The schematic diagram of the structure of the electric seat shown is when the electric leg rest is swung to the maximum angle;

[0031] Figure 6 for Figure 1 The schematic diagram of the structure of the electric seat shown is when the electric leg rest is swung to a certain angle;

[0032] Figure 7 for Figure 1 The schematic diagram of the structure of the electric seat shown is when the electric leg rest is fully retracted;

[0033] Figure 8 for Figure 1 The partial physical picture corresponding to the electric seat shown;

[0034] Fig. 9 The present invention is a flow chart of an anti-pinch control method for an electric leg rest swing of an electric seat based on a dual sensing system in one embodiment.

[0035] Figure numerals: 10, electric seat; 100, seat body; 200, seat bracket; 300, electric leg rest; 400, anti-pinch sensor assembly; 401, bottom plane; 402, inclined surface; 403, first through hole; 404, second through hole; 410, first sensor; 411, first sensor panel; 412, first sensor component; 420, second sensor; 421, second sensor panel; 422, second sensor component. DETAILED DESCRIPTION

[0036] In order to facilitate the understanding of the present disclosure, the present disclosure will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present disclosure are given in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present disclosure more thoroughly and comprehensively understood.

[0037] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present disclosure. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0039] In order to better understand the technical solutions and beneficial effects of the present invention, the present invention is further described in detail below in conjunction with specific embodiments:

[0040] See also Figure 1 , which is an electric chair 10 based on a dual sensing system according to an embodiment of the present invention, including a seat body 100, a seat bracket 200, an electric leg rest 300, a leg rest driving sensing mechanism (not shown) and an anti-pinch sensing assembly 400, and the corresponding physical diagram is as shown in FIG. Figure 8 shown.

[0041] The seat bracket 200 is connected to the bottom of the seat body 100; the electric leg rest 300 is movably connected to one side of the seat body 100; the leg rest driving sensing mechanism is installed at the bottom of the seat body 100, the input end of the leg rest driving sensing mechanism is used to connect to an external power supply, and the control output end of the leg rest driving sensing mechanism is electrically connected to the electric leg rest 300, so that the leg rest driving sensing mechanism drives the electric leg rest 300 to swing outward or inward, thereby forming an adjustable swing area 10a between the electric leg rest 300 and the side of the seat body 100; Figure 2 and Figure 3 As shown, the anti-pinch sensor component 400 is installed on the side of the electric leg rest 300 facing the seat bracket 200, and the anti-pinch sensor component 400 has a bottom plane 401 and an inclined surface 402. The bottom plane 401 is located on the side of the anti-pinch sensor component 400 close to the leg rest drive sensing mechanism, and the inclined surface 402 is located on the side of the anti-pinch sensor component 400 away from the leg rest drive sensing mechanism. The anti-pinch sensor component 400 is provided with a first sensor 410 and a second sensor 420. The first sensor 410 is located on the bottom plane 401, and the second sensor 420 is located on the inclined surface 402. The sensing collection end of the leg rest drive sensing mechanism is electrically connected to the first sensor 410 and the second sensor 420 respectively to collect sensing information of the first sensor 410 and the second sensor 420. The first sensor 410 is used to gradually weaken the sensing sensitivity when the electric leg rest 300 swings downward, and gradually increase the sensing sensitivity when it swings upward. The second sensor 420 is used to gradually increase the sensing sensitivity when the electric leg rest 300 swings downward, and gradually weaken the sensing sensitivity when it swings upward.

[0042] In this embodiment, the leg rest driving sensing mechanism is used to drive the electric leg rest 300 to swing to a certain angle. When the electric leg rest 300 swings to a certain angle, the leg rest driving sensing mechanism will also control the first sensor 410 and the second sensor 420 when the electric leg rest 300 swings to change the sensing sensitivity of the two. The sensing sensitivity values ​​of the first sensor 410 and the second sensor 420 are complementary. That is, when the sensing sensitivity of the first sensor 410 weakens, the sensing sensitivity of the second sensor 420 increases, and the total sensing sensitivity value of the first sensor 410 and the second sensor 420 remains unchanged. Conversely, when the sensing sensitivity of the second sensor 420 weakens, the sensing sensitivity of the first sensor 410 increases.

[0043] In a preferred embodiment, the first sensor 410 and / or the second sensor 420 are both infrared sensors.

[0044] In this embodiment, the electric seat 10 adopts an anti-pinch sensor component 400, which has a first sensor 410 and a second sensor 420, that is, a dual sensor is adopted, wherein one sensor is located on the bottom plane 401, and the other sensor is located on the inclined surface 402. This enables the first sensor 410 and the second sensor 420 to cooperate with each other when the leg rest drive sensing mechanism controls the electric leg rest 300 to swing, so as to detect whether there are objects under the electric leg rest 300, such as pets, human hands or other foreign objects. When the first sensor 410 or the second sensor 420 detects the above objects, the anti-pinch mechanism is triggered to prevent the electric leg rest 300 from continuing to swing. Thus, the setting of the anti-pinch sensor component 400 can prevent pinching injuries and ensure the safety of the electric seat 10.

[0045] It can be understood that the first sensor 410 and the second sensor 420 are both used to sense whether there is an object under the electric leg rest 300. When the electric leg rest 300 forms a maximum angle with the side of the seat body 100, that is, when the electric leg rest 300 is opened to the maximum angle, the first sensor 410 is used to sense whether there is an object, and its sensing sensitivity is the highest, while the second sensor 420 is turned off. The effect diagram is as shown in FIG. Figure 5 As shown; when the electric leg rest 300 is retracted from the position corresponding to the maximum angle toward the direction close to the seat body 100, the sensing sensitivity of the first sensor 410 gradually decreases, and the sensing sensitivity of the second sensor 420 gradually increases. When the electric leg rest 300 is retracted to a certain angle, the second sensor 420 is mainly used to detect whether there is an object directly below the electric leg rest 300. At this time, the sensing sensitivity of the first sensor 410 is weaker than that of the second sensor 420. The effect diagram is as shown in Figure 6As shown, until the electric leg rest 300 is retracted, the first sensor 410 is turned off, and the second sensor 420 has the highest sensitivity, which can prevent the first sensor 410 from misjudging that there is an object and causing the electric leg rest 300 to fail to retract normally. The effect diagram is as shown in FIG. Figure 7 shown.

[0046] Furthermore, the first sensor 410 is used to gradually reduce the sensing sensitivity when the electric leg rest 300 swings downward, and gradually increase the sensing sensitivity when it swings upward, and the second sensor 420 is used to gradually increase the sensing sensitivity when the electric leg rest 300 swings downward, and gradually reduce the sensing sensitivity when it swings upward.

[0047] In this embodiment, during the downward swinging of the electric leg rest 300, the sensing sensitivity of the first sensor 410 gradually weakens, and the sensing sensitivity of the second sensor 420 gradually increases, and the sensing area of ​​the first sensor 410 gradually moves from the bottom of the electric leg rest 300 to the side of the seat body 100, which makes the first sensor 410 no longer sensitive when sensing, and the sensing area of ​​the second sensor 420 gradually moves from the front of the seat body 100 to the bottom of the electric leg rest 300, which makes the second sensor 420 become more sensitive when sensing and gradually become the main body of the detection object, while the first sensor 410 no longer serves as the main body of the detection object. It can be understood that before the electric leg rest 300 swings downward to a certain angle or is retracted, the first sensor 410 serves as the main body for detecting whether there is an object below the electric leg rest 300. When the first sensor 410 detects that there is an object below the electric leg rest 300, it obtains sensing data information and feeds back to the leg rest drive sensing mechanism. The data information reaches the threshold for triggering the anti-pinch mechanism, so that the leg rest drive sensing mechanism prevents the electric leg rest 300 from swinging downward. When there is no object below the electric leg rest 300, the leg rest drive sensing mechanism can drive the electric leg rest 300 to swing downward, and the second sensor 420 gradually no longer serves as the main body for detecting objects. Even if people, pets and other living things pass through the sensing area of ​​the second sensor 420, the anti-pinch mechanism will not be triggered due to the sensing conditions of the second sensor 420. When the electric leg rest 300 swings downward, the sensing sensitivity of the first sensor 410 decreases as the downward swing angle of the electric leg rest 300 increases, which gradually increases the threshold of the anti-pinch mechanism triggered when the first sensor 410 detects an object, and the sensing area of ​​the first sensor 410 gradually moves from the horizontal plane to the side of the seat body 100. Even if the first sensor 410 detects the seat body 100, it cannot reach the threshold of the anti-pinch mechanism triggered, so that the leg rest driving sensing mechanism will not prevent the electric leg rest 300 from swinging due to the sensing condition of the first sensor 410; for the second sensor 420, its sensing sensitivity increases as the downward swing angle of the electric leg rest 300 increases, which gradually reduces the triggering of the anti-pinch mechanism when the second sensor 420 detects an object. The sensing area of ​​the second sensor 420 gradually moves to the bottom of the electric leg rest 300 as the electric leg rest 300 swings downward, and gradually becomes the main body for detecting whether there is an object under the electric leg rest 300. When the electric leg rest 300 swings downward, if the second sensor 420 detects that a living thing such as a pet passes by under the electric leg rest 300, the sensing data is collected and fed back to the leg rest driving sensing mechanism. The data reaches the threshold of the anti-pinch mechanism triggered when the second sensor 420 detects an object, thereby triggering the anti-pinch mechanism, so that the leg rest driving sensing mechanism prevents the electric leg rest 300 from continuing to swing downward. Otherwise, when there is no living thing passing under the electric leg rest 300, the electric leg rest 300 can continue to swing downward regardless of the sensing situation of the first sensor 410.

[0048] Generally speaking, when the electric leg rest 300 swings downward, the sensing sensitivity of the second sensor 420 gradually increases, while the sensing sensitivity of the first sensor 410 gradually decreases, so that when detecting whether an object exists, the second sensor 420 gradually becomes dominant. This means that when there is no living object passing under the electric leg rest 300, the first sensor 410 will not trigger the anti-pinch mechanism even if it detects the seat body 100, so that the electric leg rest 300 can swing down smoothly or be fully retracted, and the second sensor 420 is used to detect whether there is an object under the electric leg rest 300 at any time when the electric leg rest 300 swings downward, and when an object is detected, the leg rest drive sensing mechanism stops the electric leg rest 300 from continuing to swing, thereby preventing pinching during the swinging process.

[0049] In another embodiment, during the upward swinging process of the electric leg rest 300, the sensing sensitivity of the first sensor 410 gradually increases, and the sensing sensitivity of the second sensor 420 gradually decreases, and the sensing area of ​​the second sensor 420 gradually moves away from the electric seat 10 from the bottom of the electric leg rest 300, which makes the second sensor 420 no longer sensitive when sensing, and the sensing area of ​​the first sensor 410 gradually moves from the side of the seat body 100 to the bottom of the electric leg rest 300, which makes the first sensor 410 become more sensitive when sensing and gradually becomes the main body of the detection object, while the second sensor 420 no longer serves as the main body of the detection object. It can be understood that before the electric leg rest 300 swings upward to a certain angle or is fully unfolded, the second sensor 420 serves as the main body for detecting whether there is an object under the electric leg rest 300. When the second sensor 420 detects that there is an object under the electric leg rest 300, it obtains sensing data information and feeds back to the leg rest drive sensing mechanism. The data information reaches the threshold for triggering the anti-pinch mechanism, so that the leg rest drive sensing mechanism prevents the electric leg rest 300 from swinging upward. When there is no object under the electric leg rest 300, the leg rest drive sensing mechanism can drive the electric leg rest 300 to swing upward, and the first sensor 410 gradually no longer serves as the main body for detecting objects. Even if the first sensor 410 detects the side of the seat body 100, it is not enough to reach the threshold for triggering the anti-pinch mechanism, so that the anti-pinch mechanism will not be triggered due to the sensing condition of the first sensor 410.When the electric leg rest 300 swings upward, the sensing sensitivity of the second sensor 420 decreases as the upward swing angle of the electric leg rest 300 increases, which gradually increases the threshold of the anti-pinch mechanism triggered when the second sensor 420 detects an object, and the sensing area of ​​the second sensor 420 gradually moves away from the electric seat 10 from the bottom of the electric leg rest 300. After swinging to a certain angle or unfolding, even if the second sensor 420 detects that a living thing passes through the sensing area, the threshold of the anti-pinch mechanism cannot be reached, so that the leg rest driving sensing mechanism will not prevent the electric leg rest 300 from swinging due to the interference of the second sensor 420; for the first sensor 410, its sensing sensitivity increases as the upward swing angle of the electric leg rest 300 increases, which gradually reduces the sensing sensitivity of the first sensor 410 The threshold of the anti-pinch mechanism is triggered when an object is detected, and the sensing area of ​​the first sensor 410 gradually moves from the side of the seat body 100 to the bottom of the electric leg rest 300, and gradually becomes the main body for detecting whether there is an object under the electric leg rest 300. When the electric leg rest 300 swings upward, if the first sensor 410 detects that a living thing passes under the electric leg rest 300, it collects sensing data and feeds it back to the leg rest drive sensing mechanism. The data reaches the threshold of the anti-pinch mechanism triggered when the first sensor 410 detects an object, and then triggers the anti-pinch mechanism, so that the leg rest drive sensing mechanism prevents the electric leg rest 300 from continuing to swing upward. Otherwise, when there is no living thing passing under the electric leg rest 300, the electric leg rest 300 can continue to swing upward regardless of the sensing situation of the second sensor 420.

[0050] Generally speaking, when the electric leg rest 300 swings upward, the sensing sensitivity of the first sensor 410 gradually increases, while the sensing sensitivity of the second sensor 420 gradually decreases, so that when detecting whether an object exists, the first sensor 410 gradually becomes dominant. This means that when there is no living creature passing under the electric leg rest 300, even if a person or pet or other living creature passes in front of the electric seat 10, that is, passes through the sensing area of ​​the second sensor 420, the anti-pinch mechanism will not be triggered, so that the electric leg rest 300 can be smoothly swung up or fully unfolded, and the first sensor 410 is used to detect whether there is an object under the electric leg rest 300 at any time when the electric leg rest 300 swings downward, and when an object is detected, the leg rest drives the sensing mechanism to stop the electric leg rest 300 from continuing to swing, thereby preventing pinching during the swinging process.

[0051] If only one sensor is used, when the sensor is only set on the bottom plane 401 of the anti-pinch sensor component 400 in the present solution, the sensor will continuously sense whether there is an object during the retraction of the electric leg rest 300. This causes the projection sensing area of ​​the sensor to gradually move from the horizontal plane to the side of the seat body 100 when the electric leg rest 300 is retracted. At this time, the sensor recognizes the seat body 100 and feeds back the collected information to the leg rest drive sensing mechanism. After obtaining the information, the mechanism triggers the anti-pinch mechanism to prevent the electric leg rest 300 from further retracting. This makes it impossible for the electric leg rest 300 to be retracted normally, so that there is always a certain angle between the electric leg rest 300 and the side of the seat body 100; when the sensor is only set on the inclined surface 402 of the anti-pinch sensor component 400 in the present solution, if the electric leg rest 300 is in a state of being opened to the maximum angle, the sensor cannot sense the electric leg rest 300. In addition, when a person or a pet passes in front of the electric seat 10 and the sensor detects that there is a living creature in its sensing area, the electric leg rest 300 cannot be retracted normally regardless of whether there is an object directly below the electric leg rest 300. This greatly reduces the user experience of the electric seat 10 and does not meet the user's requirements for the electric seat 10. Therefore, the present solution needs to adopt two sensors, namely the first sensor 410 and the second sensor 420, and the first sensor 410 is located on the bottom plane 401, and the second sensor 420 is located on the inclined surface 402, so that the two sensors can better cooperate to detect whether there is an object directly below the electric leg rest 300, thereby ensuring that the electric leg rest 300 swings downward or upward normally when there is no object below the electric leg rest 300, and when any one of the first sensor 410 and the second sensor 420 detects that there is an object below the electric leg rest 300, the leg rest driving sensing mechanism prevents the electric leg rest 300 from continuing to swing.

[0052] like Figure 2 As shown, in one embodiment, the angle θ formed between the extension line of the bottom plane 401 and the extension line of the inclined surface 402 is 40-50°. In a preferred embodiment, the angle θ formed between the extension line of the bottom plane 401 and the extension line of the inclined surface 402 is 45°.

[0053] In one embodiment, the angle range α of the swing area is 0-90°. It can be understood that when the electric leg rest 300 is closed with the side of the seat body 100, the angle formed is 0°, that is, the bottom surface of the electric leg rest 300 is against the side of the seat body 100, and when the electric leg rest 300 is opened to the maximum position, the electric leg rest 300 and the side of the seat body 100 form an angle of 90°.

[0054] like Figure 4 As shown, in one embodiment, the first sensor 410 includes a first sensor panel 411 and a first sensor component 412. The first sensor panel 411 is located in the inner cavity of the anti-pinch sensor assembly 400. The output end of the first sensor panel 411 is electrically connected to the first sensor component 412. The control output end of the leg rest driving sensing mechanism is electrically connected to the input end of the first sensor panel 411. The sensing acquisition end of the first sensor component 412 is electrically connected to the data receiving end of the first sensor panel 411. The first sensor component 412 is located on the bottom plane 401. It can be understood that when the first sensor 410 is working, the leg rest driving sensing mechanism drives the first sensor panel 411 to be powered on. At this time, the first sensor component 412 is started and enters the working state. When the first sensor component 412 senses an object, it collects light sensing information, converts the information into an electrical signal through the conversion circuit of the first sensor panel 411, and feeds the electrical signal back to the leg rest driving sensing mechanism, thereby triggering the anti-pinch mechanism, thereby preventing the electric leg rest 300 from continuing to swing. Furthermore, the anti-pinch sensor assembly 400 is provided with a first through hole 403, the first through hole 403 is connected to the inner cavity of the anti-pinch sensor assembly 400, the first through hole 403 is located on the bottom plane 401, and the first sensor component 412 is passed through the first through hole 403, so that after the first sensor component 412 passes through the first through hole 403, its sensing area is projected toward the horizontal plane to detect whether there is an object in the sensing area. In this embodiment, the first sensor component 412 is an infrared sensor component.

[0055] like Figure 4As shown, in one embodiment, the second sensor 420 includes a second sensor panel 421 and a second sensor component 422. The second sensor panel 421 is located in the inner cavity of the anti-pinch sensor assembly 400. The output end of the second sensor panel 421 is electrically connected to the second sensor component 422. The control output end of the leg rest drive sensing mechanism is electrically connected to the input end of the second sensor panel 421. The sensing acquisition end of the second sensor component 422 is electrically connected to the data receiving end of the second sensor panel 421. The second sensor component 422 is located on the inclined surface 402. It can be understood that when the second sensor 420 is working, the leg rest drive sensing mechanism drives the second sensor panel 421 to be energized. At this time, the second sensor component 422 is started and enters the working state. When the second sensor component 422 senses an object, it collects light sensing information, converts the information into an electrical signal through the conversion circuit of the second sensor panel 421, and feeds the electrical signal back to the leg rest drive sensing mechanism, thereby triggering the anti-pinch mechanism, thereby preventing the electric leg rest 300 from continuing to swing. Furthermore, the anti-pinch sensor assembly 400 is provided with a second through hole 404, the second through hole 404 is connected to the inner cavity of the anti-pinch sensor assembly 400, the second through hole 404 is located on the inclined surface 402, and the second sensor component 422 is penetrated through the second through hole 404, so that after the second sensor component 422 passes through the second through hole 404, its sensing area is projected toward the horizontal plane to detect whether there is an object in the sensing area. In this embodiment, the second sensor component 422 is an infrared sensor component.

[0056] Furthermore, when the leg rest driving sensing mechanism drives the electric leg rest 300 to swing, the parameters of the resistance or capacitance in the first sensor panel 411 and the second sensor panel 421 are dynamically adjusted. Specifically, when the electric leg rest 300 swings outward, the value of the resistance or capacitance of the first sensor panel 411 is increased, and the value of the resistance or capacitance of the second sensor panel 421 is decreased, so that the voltage of the first sensor component 412 is increased, the sensing sensitivity is enhanced, and the voltage of the second sensor component 422 is decreased, and the sensing sensitivity is reduced; conversely, when the electric leg rest 300 is retracted inward, the value of the resistance or capacitance of the second sensor panel 421 is increased, and the value of the resistance or capacitance of the first sensor panel 411 is decreased, so that the sensing sensitivity of the second sensor component 422 is enhanced, and the sensing sensitivity of the first sensor component 412 is reduced.

[0057] like Fig. 9 As shown, the present disclosure also provides an electric leg rest swing anti-pinch control method for an electric seat 10 based on a dual-sensor system, which is performed by using the electric seat 10 based on a dual-sensor system of any of the above embodiments to adjust a predetermined angle formed between the electric leg rest 300 and the side of the seat body 100 within a swing area, that is, the predetermined angle range is 0-90°, and the electric leg rest swing anti-pinch control method includes some or all of the following steps:

[0058] S101, obtaining the swing angle of the electric leg rest 300. It can be understood that the swing angle is the angle formed between the electric leg rest 300 and the side of the seat body 100 in the above-mentioned electric chair 10, and further, the range of the angle is 0-90°. Further, when the electric leg rest 300 is closed to the side of the seat body 100, the swing angle is 0°, and when the electric leg rest 300 is opened to the maximum position, the swing angle is 90°.

[0059] S103, obtaining a swing angle increment according to the swing angle. In this embodiment, the swing angle can be divided into a first swing angle and a second swing angle, the first swing angle is the angle before the electric leg rest 300 swings, the second swing angle is the angle after the electric leg rest 300 swings a certain angle, and the swing angle increment is the numerical difference between the second swing angle and the first swing angle.

[0060] S105, detecting whether the swing angle increment is greater than the preset angle increment. In this embodiment, the preset angle increment is set to 0, so that the numerical difference between the second swing angle and the first swing angle is compared with the preset angle increment, and the sensing sensitivity of the first sensor 410 and the sensing sensitivity of the second sensor 420 are adjusted according to the magnitude of the two. Specifically, the swing angle increment can be a positive value or a negative value.

[0061] S107, when the swing angle increment is greater than the preset angle increment, increase the sensing light flux of the first sensor 410, and reduce the sensing light flux of the second sensor 420. In this embodiment, when the swing angle increment is greater than the preset angle increment, it can be understood that the numerical difference between the second swing angle and the first swing angle is greater than the preset angle increment, that is, the numerical difference is greater than 0, indicating that the electric leg rest 300 swings outward by a certain angle, and at this time the leg rest driving sensing mechanism outputs a sensing enhancement signal to the first sensor 410, and outputs a weakening signal to the second sensor 420, so that the sensing sensitivity of the first sensor 410 gradually increases, and the sensing sensitivity of the second sensor 420 gradually decreases.

[0062] Furthermore, since the first sensor 410 is located on the bottom plane 401, when the electric leg rest 300 swings outward, the first sensor 410 projects the sensing area to the horizontal plane below the electric leg rest 300; since the second sensor 420 is located on the inclined plane 402, when the electric leg rest 300 swings outward, if the sensing sensitivity of the second sensor 420 is not adjusted, the sensing area projected by the second sensor 420 gradually moves away from the electric seat 10, which causes the anti-pinch mechanism to be triggered when a person or other living thing passes in front of the electric seat 10, preventing the electric leg rest 300 from continuing to unfold or retract. To prevent the second sensor 420 from being falsely triggered, the sensing sensitivity of the second sensor 420 gradually decreases during the outward swinging of the electric leg rest 300. In another embodiment, when the swing angle increment is greater than the preset angle increment, so that the electric leg rest 300 swings to the first extreme position, the sensing light flux of the first sensor 410 is increased to the maximum value, and the second sensor 420 is turned off. Specifically, the electric leg rest 300 swings to the first extreme position, which can be understood as the electric leg rest 300 swings to the maximum angle, that is, the electric leg rest 300 swings to the maximum angle within the swing area.

[0063] In one embodiment, detecting whether the swing angle increment is greater than a preset angle increment further includes: when the swing angle increment is less than the preset angle increment, increasing the sensing light flux of the second sensor 420 and reducing the sensing light flux of the first sensor 410.

[0064] In this embodiment, the numerical difference between the second swing angle and the first swing angle is less than 0. It can be understood that when the numerical difference is less than 0, it means that the electric leg rest 300 swings inward by a certain angle. At this time, the leg rest drive sensing mechanism outputs an enhanced sensing signal to the second sensor 420 according to the swing angle data, and outputs a weakened signal to the first sensor 410, so that the sensing sensitivity of the second sensor 420 gradually increases, and the sensing sensitivity of the first sensor 410 gradually decreases. Furthermore, when the electric leg rest 300 swings inward, the sensing projection part of the first sensor 410 gradually moves to the side of the seat body 100. If the sensing sensitivity of the first sensor 410 is not adjusted, then during the retraction of the electric leg rest 300, the first sensor 410 identifies the seat body 100 and determines it as a foreign object, thereby triggering the anti-pinch mechanism, which causes the electric leg rest 300 to be unable to retract normally. To prevent the first sensor 410 from being falsely triggered, the sensing sensitivity of the first sensor 410 is gradually reduced during the inward swinging of the electric leg rest 300. At the same time, during the retraction process, the sensing area of ​​the second sensor 420 is gradually perpendicular to the horizontal plane to normally sense whether there is an object at the bottom of the electric leg rest 300. In another embodiment, when the swing angle increment is less than the preset angle increment, so that the electric leg rest 300 swings to the second extreme position, the sensing light flux of the second sensor 420 is increased to the maximum value, and the first sensor 410 is turned off. Specifically, the electric leg rest 300 swings to the second extreme position, which can be understood as the electric leg rest 300 swings to the minimum angle, that is, the electric leg rest 300 swings to the minimum angle within the swing area.

[0065] When the electric leg rest 300 of the electric chair 10 swings, the leg rest driving sensing mechanism will monitor the swinging direction of the electric leg rest 300. If the electric leg rest 300 swings away from the seat body 100, that is, swings outward, the sensing sensitivity of the first sensor 410 will be gradually increased, the sensing sensitivity of the second sensor 420 will be gradually reduced, and the second sensor 420 will be turned off when it swings to the maximum angle to prevent the second sensor 420 from erroneously triggering the anti-pinch mechanism; if it swings toward the seat body 100, that is, retracts inward, the sensing sensitivity of the second sensor 420 will be gradually increased, the sensing sensitivity of the first sensor 410 will be gradually reduced, and the first sensor 410 will be turned off when it is fully retracted to prevent the first sensor 410 from erroneously triggering the anti-pinch mechanism. In this way, when the electric leg rest 300 swings, the first sensor 410 and the second sensor 420 can cooperate well to normally identify whether there is an object under the electric leg rest 300. Furthermore, the first sensor 410 and the second sensor 420 are both infrared sensors, so that the sensing light flux described in the above embodiment can be expressed as infrared sensing flux, that is, infrared sensing sensitivity. In other embodiments, the first sensor 410 and the second sensor 420 can also be photoelectric sensors.

[0066] In another embodiment, it is detected whether the swing angle increment is greater than the preset angle increment, and then it also includes: when the swing angle increment is equal to the preset angle increment, the sensing light flux of the first sensor 410 and the sensing light flux of the second sensor 420 remain unchanged. In this embodiment, the numerical difference between the second swing angle and the first swing angle is equal to 0, which means that the electric leg rest 300 does not swing. At this time, the leg rest driving sensing mechanism no longer controls the first sensor 410 and the second sensor 420 and changes the sensing sensitivity of the two, so that the first sensor 410 and the second sensor 420 maintain the status quo, and the sensing sensitivity of the first sensor 410 and the second sensor 420 is changed only when the electric leg rest 300 swings in any direction.

[0067] Compared with the prior art, the present invention has at least the following advantages:

[0068] 1. The above-mentioned electric seat 10 based on the dual sensing system adopts an anti-pinch sensor component 400, which has a first sensor 410 and a second sensor 420, that is, a dual sensor is adopted, where one sensor is located on the bottom plane 401, and the other sensor is located on the inclined surface 402. This enables the first sensor 410 and the second sensor 420 to cooperate with each other when the leg rest drive sensing mechanism controls the electric leg rest 300 to swing, so as to detect whether there are objects under the electric leg rest 300, such as pets, human hands or other foreign objects. When the first sensor 410 or the second sensor 420 detects the above objects, the anti-pinch mechanism is triggered to prevent the electric leg rest 300 from continuing to swing, so that the setting of the anti-pinch sensor component 400 can prevent pinching injuries and ensure the safety of the electric seat 10.

[0069] 2. When the electric leg rest 300 swings, the leg rest driving sensing mechanism will monitor the swinging direction of the electric leg rest 300. If the electric leg rest 300 swings away from the seat body 100, the sensing sensitivity of the first sensor 410 will be gradually increased, the sensing sensitivity of the second sensor 420 will be gradually reduced, and the second sensor 420 will be turned off when it swings to the maximum angle to prevent the second sensor 420 from erroneously triggering the anti-pinch mechanism; if it swings toward the seat body 100, the sensing sensitivity of the second sensor 420 will be gradually increased, the sensing sensitivity of the first sensor 410 will be gradually reduced, and the first sensor 410 will be turned off when it is fully retracted to prevent the first sensor 410 from erroneously triggering the anti-pinch mechanism. In this way, when the electric leg rest 300 swings, the first sensor 410 and the second sensor 420 can cooperate well to normally identify whether there is an object under the electric leg rest 300.

[0070] The above-mentioned embodiments only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the disclosed patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the disclosed patent shall be subject to the attached claims.

Claims

1. An electric seat based on a dual sensing system, characterized in that: include: Seat body; A seat bracket connected to the bottom of the seat body; An electric leg rest, movably connected to one side of the seat body; A leg rest driving sensing mechanism is installed at the bottom of the seat body, the input end of the leg rest driving sensing mechanism is used to connect to an external power source, and the control output end of the leg rest driving sensing mechanism is electrically connected to the electric leg rest, so that an adjustable swinging area is formed between the electric leg rest and the side of the seat body; An anti-pinch sensor component is installed on a side of the electric leg rest facing the seat support, the anti-pinch sensor component having a bottom plane and an inclined surface, the bottom plane is located on a side of the anti-pinch sensor component close to the leg rest drive sensing mechanism, and the inclined surface is located on a side of the anti-pinch sensor component away from the leg rest drive sensing mechanism, the anti-pinch sensor component is provided with a first sensor and a second sensor, the first sensor is located on the bottom plane, the second sensor is located on the inclined surface, the sensing collection end of the leg rest drive sensing mechanism is electrically connected to the first sensor and the second sensor respectively, the first sensor is used for gradually weakening the sensing sensitivity when the electric leg rest swings downward, and gradually increasing the sensing sensitivity when it swings upward, the second sensor is used for gradually increasing the sensing sensitivity when the electric leg rest swings downward, and gradually weakening the sensing sensitivity when it swings upward.

2. The electric seat according to claim 1, characterized in that: The angle formed between the extension line of the bottom plane and the extension line of the inclined surface is 40-50°.

3. The electric seat according to claim 2, characterized in that: An angle formed between an extension line of the bottom plane and an extension line of the inclined surface is 45°.

4. The electric seat according to claim 1, characterized in that: The angle range of the swing area is 0-90°.

5. The electric seat according to claim 1, characterized in that: The first sensor includes a first sensor panel and a first sensor component. The first sensor panel is located in the inner cavity of the anti-pinch sensor assembly. The output end of the first sensor panel is electrically connected to the first sensor component. The control output end of the leg rest drive sensing mechanism is electrically connected to the input end of the first sensor panel. The sensing acquisition end of the first sensor component is electrically connected to the data receiving end of the first sensor panel. The first sensor component is located on the bottom plane.

6. The electric seat according to claim 5, characterized in that: The anti-pinch sensor component is provided with a first through hole, the first through hole is communicated with the inner cavity of the anti-pinch sensor component, the first through hole is located on the bottom plane, and the first sensor component is penetrated through the first through hole.

7. The electric seat according to claim 1, characterized in that: The second sensor includes a second sensor panel and a second sensor component. The second sensor panel is located in the inner cavity of the anti-pinch sensor assembly. The output end of the second sensor panel is electrically connected to the second sensor component. The control output end of the leg rest drive sensing mechanism is electrically connected to the input end of the second sensor panel. The sensing acquisition end of the second sensor component is electrically connected to the data receiving end of the second sensor panel. The second sensor component is located on the inclined surface.

8. The electric seat according to claim 7, characterized in that: The anti-pinch sensor component is provided with a second through hole, the second through hole is communicated with the inner cavity of the anti-pinch sensor component, the second through hole is located on the inclined surface, and the second sensor component is penetrated through the second through hole.

9. A method for controlling the swinging anti-pinch of an electric leg rest of an electric seat based on a dual-sensing system, characterized in that: The electric seat based on the dual-sensor system as claimed in any one of claims 1 to 8 is used to adjust the predetermined angle formed between the electric leg rest and the side of the seat body within the swing area, and the electric leg rest swing anti-pinch control method comprises the following steps: Obtain the swing angle of the electric leg rest; Acquire a swing angle increment according to the swing angle; Detecting whether the swing angle increment is greater than a preset angle increment; When the swing angle increment is greater than the preset angle increment, the sensing light flux of the first sensor is increased, and the sensing light flux of the second sensor is reduced.

10. The electric leg support swing anti-pinch control method according to claim 9, characterized in that: The step of detecting whether the swing angle increment is greater than a preset angle increment further includes: When the swing angle increment is less than the preset angle increment, the sensing light flux of the second sensor is increased, and the sensing light flux of the first sensor is reduced.

Images