Anti-pinch intelligent bed and anti-pinch system

Abstract

This invention provides an anti-pinch smart bed and anti-pinch system, relating to the field of smart bed technology. It includes: a lifting unit, a bed frame, and a first voltage sensing wire and a second voltage sensing wire that are not in contact with each other and alternately pass between the lifting unit and the bed frame. One end of each of the first and second voltage sensing wires is electrically connected to a control box, while the other ends are in an open-circuit state, recording a back reference current. The real-time back current is compared with the back reference current of the back drive motor at the current Hall effect position. If the comparison results are inconsistent, the leg drive motor and the back drive motor stop operating. The beneficial effects are that multiple anti-pinch sensing wires prevent the lifting unit from moving when a person or object is inserted into the anti-pinch sensing wire, thus stopping the lifting and lowering of the bed and preventing pinching injuries. It also achieves sensitive detection of current changes; once a deviation from the reference current is found, the motor operation is immediately stopped, effectively preventing pinching incidents and ensuring user safety.

Description

Technical Field

[0001] This invention relates to the field of smart bed technology, and in particular to an anti-pinch smart bed and anti-pinch system. Background Technology

[0002] Smart beds, as a culmination of modern home technology, aim to provide users with a more comfortable, convenient, and safe sleep experience. However, in practical applications, especially under heavy loads, the safety protection mechanisms of existing smart beds still reveal some significant shortcomings. First, in terms of protection against shearing mechanical damage, smart beds often lack dynamic load monitoring and fail to fully consider the local stress concentration caused by user movements. This makes the bed frame prone to deformation under prolonged heavy pressure, increasing the risk of shearing damage. Simultaneously, deficiencies in the materials or structural design of some bed frames further limit their safety under extreme load conditions. Second, existing smart beds often use overcurrent detection on the motor for anti-pinch protection. However, this overcurrent protection mechanism suffers from lag and irreversibility issues. Traditional overcurrent detection often only triggers protection after the current abnormally reaches a dangerous level, by which time irreversible damage to the user may have already occurred. Summary of the Invention

[0003] To address the problems existing in the prior art, the present invention provides an anti-pinch smart bed, comprising: a lifting unit, a bed frame, and an anti-pinch sensing line. The anti-pinch sensing line includes a first voltage sensing line and a second voltage sensing line. The first voltage sensing line and the second voltage sensing line do not contact each other and alternately pass between the lifting unit and the bed frame. One end of the first voltage sensing line and the second voltage sensing line are respectively electrically connected to a control box, and the other end is in an open circuit state.

[0004] Preferably, the first voltage sensing line and the second voltage sensing line are bare conductors, and there is a potential difference between the first voltage sensing line and the second voltage sensing line.

[0005] Preferably, the lifting unit includes a backrest board and / or a footrest board.

[0006] Preferably, the bed frame is equipped with a cable retractor, the other ends of the first voltage sensing wire and the second voltage sensing wire are housed within the cable retractor, the cable retractor being a cable retractor box, and the other ends of the first voltage sensing wire and the second voltage sensing wire are connected to an automatically retractable elastic element disposed inside the cable retractor box; or

[0007] The winding device is a winding reel, and the other ends of the first voltage sensing wire and the second voltage sensing wire are connected to a tension sensor installed inside the winding reel.

[0008] Preferably, when the lifting unit rises, the anti-pinch sensing line is pulled out from the retracting device; when the lifting unit descends, the anti-pinch sensing line is retracted into the retracting device.

[0009] Preferably, the lifting part is provided with a plurality of first hooks, and the bed frame is provided with a plurality of second hooks, and the anti-pinch sensing line alternately passes through the first hooks and the second hooks.

[0010] Preferably, an emergency stop rope is provided at the center of the bottom surface of the lifting unit.

[0011] The present invention also provides an anti-pinch system for an anti-pinch smart bed, applied to the anti-pinch smart bed as described above. The lifting part of the anti-pinch smart bed includes a backrest board, the backrest board is equipped with a backrest drive motor, and the anti-pinch system includes:

[0012] A reference current acquisition module, connected to the back drive motor, is used to record the back reference current corresponding to each Hall position of the back drive motor during the entire movement stroke of the anti-pinch smart bed when the user uses it for the first time.

[0013] A real-time current acquisition module, connected to the reference current acquisition module, is used to detect the real-time back current of the back drive motor at the current Hall position when it is not used for the first time.

[0014] The current anti-pinch module is connected to the real-time current acquisition module and is used to compare the real-time back current with the back reference current of the back drive motor at the current Hall position. If the comparison result is inconsistent, the back drive motor will stop running.

[0015] An anti-pinch sensor module, connected to the back drive motor, is used to control the back drive motor to stop lifting when the anti-pinch sensor line is touched by an object.

[0016] Preferably, the lifting part of the anti-pinch smart bed also includes a footboard, and the footboard is equipped with a foot drive motor;

[0017] The reference current acquisition module is also connected to the foot drive motor and is also used to record the foot reference current corresponding to each Hall position of the foot drive motor during the entire movement stroke of the anti-pinch smart bed when the user uses it for the first time.

[0018] The real-time current acquisition module is also used to detect the real-time current of the foot drive motor at the current Hall position when the foot is not used for the first time.

[0019] Preferably, it further includes a storage module for storing a preset back drive error corresponding to the back drive motor; the current anti-pinch module includes:

[0020] The back anti-pinch unit is used to calculate the back reference range based on the back reference current and the back redundancy error of the back drive motor at the current Hall position, and then stop the operation of the back drive motor when the real-time back current does not belong to the back reference range.

[0021] The above technical solution has the following advantages or beneficial effects: multiple anti-pinch sensor lines are installed in the lifting parts of the smart bed, such as between the backrest and the bed frame, and between the footrest and the bed frame, where shearing mechanical damage is likely to occur. These lines prevent users from putting their bodies or objects into these positions. When the anti-pinch sensor lines are touched, the current in the sensor lines changes, and the lifting motor stops lifting in time to avoid pinching injuries.

[0022] Compared to the lag in traditional overcurrent detection, the anti-pinch system of this invention achieves sensitive detection of current changes by pre-collecting motor current data during the user's first use (i.e., compared with the back reference current, and precisely recorded based on the Hall effect position). If a deviation between the real-time current and the pre-recorded reference current is detected during subsequent use, the motor immediately stops operating. Furthermore, the lifting motor promptly stops lifting when the anti-pinch sensor wire is touched, effectively preventing pinching injuries and ensuring user safety. Attached Figure Description

[0023] Figure 1 This is a structural diagram of an anti-pinch smart bed with a first voltage sensing line and a second voltage sensing line, as shown in some embodiments of the present invention.

[0024] Figure 2 This is a structural diagram showing the arrangement of the first and second hooks on the anti-pinch smart bed in some embodiments of the present invention;

[0025] Figure 3 This is a schematic diagram of the anti-pinch system of an anti-pinch smart bed in some embodiments of the present invention.

[0026] Reference numerals: 1. Anti-pinch sensor line; 11. First voltage sensor line; 12. Second voltage sensor line; 2. Backrest bed board; 3. Bed frame; 4. Footrest bed board; 5. Cable reel device; 6. First hook; 7. Second hook; 8. Emergency stop pull rope; 100. Reference current acquisition module; 110. Left recording unit; 120. Right recording unit; 130. Bilateral recording unit; 200. Real-time current acquisition module; 300. Current anti-pinch module; 310. Foot anti-pinch unit; 320. Back anti-pinch unit; 400. Sensor anti-pinch module; 410. Back sensor anti-pinch unit; 420. Foot sensor anti-pinch unit; 500. Emergency stop module. Detailed Implementation

[0027] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The present invention is not limited to this embodiment; other embodiments that conform to the spirit of the present invention may also fall within the scope of the present invention.

[0028] In some embodiments of the present invention, based on the above-mentioned problems existing in the prior art, an anti-pinch smart bed is provided, comprising: a lifting unit, a bed frame 3, and an anti-pinch sensing line 1;

[0029] The anti-pinch sensing line 1 includes a first voltage sensing line 11 and a second voltage sensing line 12. The first voltage sensing line 11 and the second voltage sensing line 12 do not contact each other and alternately pass between the lifting part and the bed frame 3. One end of the first voltage sensing line 11 and the second voltage sensing line 12 are electrically connected to the control box respectively, and the other end is in an open circuit state.

[0030] Specifically, the lifting unit includes a backrest board 2 and / or a footrest board 4, so the anti-pinch sensor line 1 is located between the backrest board 2 and the bed frame 3 of the anti-pinch smart bed, and between the footrest board 4 and the bed frame 3 of the anti-pinch smart bed.

[0031] Specifically, such as Figure 1 As shown, multiple anti-pinch sensor lines 1 are installed in locations prone to shearing mechanical damage, such as between the backrest board 2 and the bed frame 3, and between the footrest board 4 and the bed frame 3. (The density of the sensor lines can be adjusted as needed.) These multiple anti-pinch sensor lines 1 effectively prevent objects or people from entering these areas, thus preventing injury or damage during the bed's lifting and lowering process. Furthermore, when a foreign object is inserted, it presses against the first voltage sensor line 11 and the second voltage sensor line 12, causing them to contact simultaneously and creating a short circuit. This voltage change signal is transmitted to the control box, which then stops the drive motor.

[0032] In some embodiments of the present invention, the bed frame 3 is provided with a cable winding device 5, and the other ends of the first voltage sensing wire 11 and the second voltage sensing wire 12 are housed in the cable winding device 5. The cable winding device 5 is a cable winding box, and the other ends of the first voltage sensing wire 11 and the second voltage sensing wire 12 are connected to an automatically retractable elastic element disposed inside the cable winding box; or

[0033] The take-up device 5 is a winding device, and the other end of the first voltage sensing line 11 and the second voltage sensing line 12 is connected to a tension sensor installed inside the winding device.

[0034] When the backrest 2 or footrest 4 is raised, the anti-pinch sensor 1 is pulled out from the retractor 5.

[0035] When the backrest board 2 or the footrest board 4 is lowered, the anti-pinch sensor line 1 is retracted into the retractor 5.

[0036] More specifically, in the aforementioned embodiment, the anti-pinch sensor line 1 loosens when the backrest bed board 2 or the footrest bed board 4 descends, resulting in an unsatisfactory anti-pinch effect. Furthermore, the loosened anti-pinch sensor line 1 may become tangled or entangled with the motor. Therefore, in this embodiment, based on the aforementioned embodiment, a cable retraction device 5 is added to both the backrest bed board 2 and the footrest bed board 4. This device automatically retracts and extends the anti-pinch sensor line 1 during the raising and lowering process of the backrest bed board 2 or the footrest bed board 4, ensuring that the anti-pinch sensor line 1 remains taut at all times. This guarantees the anti-pinch effect while preventing the anti-pinch sensor line from becoming tangled or entangled with the motor.

[0037] In some embodiments of the present invention, a plurality of first hooks 6 are provided on the lifting part (back bed board 2 and / or foot bed board 4), and a plurality of second hooks 7 are provided on the bed frame 3, with the anti-pinch sensing line 1 alternately passing through the first hooks 6 and the second hooks 7.

[0038] Specifically, in this embodiment, to further enhance the blocking effect on areas of the smart bed prone to shearing mechanical damage, several hooks are added based on the aforementioned embodiment, and the sensing wire is alternately passed through the first hook 6 and the second hook 7, such as... Figure 1 As shown (only the anti-pinch sensor wire of the backrest 4 is shown; the threading method of the anti-pinch sensor wire at the footrest is the same), alternating threading can increase the sensor wire density between the backrest or footrest and the bed frame, reducing gaps where objects may enter; it is necessary to ensure that the first voltage sensor wire 11 and the second voltage sensor wire 12 do not come into contact. One hook setting method is as follows: Figure 2 The image shown is a view from one end of the bed headboard to the other (i.e., at...). Figure 1 (Viewed from right to left)

[0039] The first hook 6 is arranged in two straight rows along the length of the backrest bed board 4 at the edge of the lifting part. Figure 2 From the perspective of the left row first hook and the right row first hook, the first hooks in the left row and the right row are arranged alternately with a spacing of at least 1mm;

[0040] The second hook 7 is arranged in two straight rows along the length of the bed frame 3 at the edge of the bed frame 3, from Figure 2 From the perspective of the left row second hook and the right row second hook, the second hooks in the left row and the right row are staggered and the spacing is at least 1mm;

[0041] The first hook on the left and the second hook on the left are in a straight line, and the first hook on the right and the second hook on the right are in a straight line.

[0042] The first voltage sensing wire 11 is alternately threaded between the first hook and the second hook in the left row, and the second voltage sensing wire 12 is alternately threaded between the first hook and the second hook in the right row.

[0043] Furthermore, this wiring method ensures that the first voltage sensing wire 11 and the second voltage sensing wire 12 cannot come into contact with each other without external force. It also ensures that an object can simultaneously touch both sensing wires. The automatic retraction and extension of the anti-pinch sensing wire 1 by the wire retraction device 5 ensures that the areas prone to shearing mechanical damage are completely "sealed off," regardless of whether the backrest board 2 or the footrest board 4 is rising or falling. This guarantees the anti-pinch effect.

[0044] In some embodiments of the present invention, the first voltage sensing line 11 and the second voltage sensing line 12 are bare conductors, and there is a potential difference between the first voltage sensing line 11 and the second voltage sensing line 12.

[0045] Furthermore, in this embodiment, the anti-pinch sensing wires include a first voltage sensing wire 11 and a second voltage sensing wire 12 with a potential difference, and the two anti-pinch sensing wires are threaded in the same way as in the previous embodiment, alternately passing through the first hook 6 and the second hook 7.

[0046] Furthermore, the density of the first voltage sensing line 11 and the second voltage sensing line 12 can be adjusted by adjusting the spacing of the hooks. When the first voltage sensing line 11 and the second voltage sensing line 12 are relatively far apart, when a foreign object (such as a person's hand or household debris) touches the first voltage sensing line 11 and the second voltage sensing line 12 at the same time, the first voltage sensing line 11 and the second voltage sensing line 12, which are normally disconnected, will become connected. Since there is a potential difference between the first voltage sensing line 11 and the second voltage sensing line 12, a voltage change will be caused on the first voltage sensing line 11 and the second voltage sensing line 12. When the voltage change occurs, the control box controls the lifting motor to stop, thus preventing the person from being pinched.

[0047] When the first voltage sensing line 11 and the second voltage sensing line 12 are closely spaced, if a finger (or other object) is inserted into the gap between the first voltage sensing line 11 and the second voltage sensing line 12, the first voltage sensing line 11 or the second voltage sensing line 12 will expand to both sides and touch the adjacent first voltage sensing line 11 or the second voltage sensing line 12, thus connecting the first voltage sensing line 11 and the second voltage sensing line 12, which are normally disconnected. At this time, voltage changes will also be caused on the first voltage sensing line 11 and the second voltage sensing line 12, and the control box will stop the lifting motor to prevent the person from being pinched.

[0048] In some embodiments of the present invention, an emergency stop rope 8 is provided in the middle of the lifting part (back bed board 2 and / or foot bed board 4).

[0049] Specifically, traditional emergency stop buttons are push-button type, while the emergency stop button in this embodiment is a pull-cord type.

[0050] Because traditional push-button emergency stop buttons are small and located in inconvenient places such as the back or footboard of the bed, they cannot be pressed immediately if electronic products on the bed frame malfunction due to some unknown factor, causing serious harm to the user.

[0051] In this embodiment, the emergency stop rope is positioned near the location where mechanical injury may occur. The rope hangs naturally and is easy to pull in case of danger, thus preventing more serious pinching injuries to the human body in a timely manner.

[0052] This invention also provides an anti-pinch system for an anti-pinch smart bed, applied to the aforementioned anti-pinch smart bed. The backrest of the anti-pinch smart bed is equipped with a back drive motor, such as... Figure 3 As shown, the anti-pinch system includes:

[0053] The reference current acquisition module 100 is connected to the back drive motor and is used to record the back reference current corresponding to each Hall position of the back drive motor during the entire movement stroke of the anti-pinch smart bed when the user uses it for the first time.

[0054] The real-time current acquisition module 200 is connected to the reference current acquisition module 100 and is used to detect the real-time back current of the back drive motor at the current Hall position when it is not used for the first time.

[0055] The current anti-pinch module 300 is connected to the real-time current acquisition module 200. It is used to compare the real-time back current with the back reference current of the back drive motor at the current Hall position. When the comparison results are inconsistent, the back drive motor is stopped from running.

[0056] The induction anti-pinch module 400 is connected to the back drive motor and is used to control the back drive motor to stop lifting when the anti-pinch sensor line is touched by an object.

[0057] Specifically, existing technologies for preventing pinching typically employ overcurrent detection. However, for smart beds with large load capacities, overcurrent detection is not sensitive enough, and by the time an overcurrent occurs, irreversible damage to the human body has usually already been caused. Therefore, in this embodiment, before the user officially uses the bed, the user needs to lie on the bed and run the smart bed through a complete lifting and lowering process once, and record the reference current of the lifting motor at each Hall position (save it in the form of a current curve) for comparison as a standard. During the actual use, the real-time current of the drive motor at each Hall position is collected in real time and compared with the reference current at that Hall position. When the real-time current and the reference current are inconsistent, the drive motor stops running.

[0058] This current comparison method has the following advantages:

[0059] 1. Instant Anti-Pinch Protection Function: Compared to the lag in traditional overcurrent detection, this system achieves sensitive detection of current changes by pre-collecting motor current data during the user's first use (i.e., foot reference current and back reference current, precisely recorded based on Hall effect positions). If a deviation between the real-time current and the pre-recorded reference current is detected during subsequent use, the motor immediately stops, effectively preventing pinching injuries and ensuring user safety.

[0060] 2. Personalized Identity Recognition Feature: Given the privacy inherent in bed use, this system utilizes the differences in current caused by varying user body shapes and weights to achieve a form of invisible identity verification. When an unauthorized user uses the bed or foreign objects are placed on it, the motor will fail to start due to current mismatch, effectively limiting unauthorized operation and enhancing the protection of personal space.

[0061] 3. Beyond-line-of-sight safety control: Through intelligent recognition, the system allows the smart bed owner to operate the height adjustment only when they are on the bed, achieving safety control beyond the user's field of vision. Even if the smart bed is not in the user's sight, or if the user is standing next to the bed, the system can accurately determine and prevent unsafe operation, greatly reducing the risk of accidental pinching injuries.

[0062] 4. Dangerous Posture Prevention Mechanism: The system further refines its safety strategy, allowing the motor to operate only when the user is in a normal lying position. This means that the motor will not respond to potentially dangerous postures such as sitting at the head, foot, or edge of the bed, effectively preventing injuries caused by improper use.

[0063] 5. Child Safety Protection Layer: Combining personalized identification and dangerous posture prevention features, this system effectively constructs a child safety barrier. Even if a child attempts to operate it independently, the smart bed will remain stationary due to current mismatch or improper posture, greatly reducing the risk of injury to the child due to misoperation.

[0064] In summary, the anti-pinch smart bed system of the present invention not only enhances user safety, but also incorporates advanced concepts such as personalized recognition and beyond-line-of-sight control, bringing more comprehensive and meticulous protection to the use of smart beds.

[0065] In another preferred embodiment of the present invention, such as Figure 3 The lifting mechanism of the anti-pinch smart bed shown also includes a footboard, which is equipped with a foot drive motor.

[0066] The reference current acquisition module 100 is also connected to the foot drive motor and is used to record the foot reference current corresponding to each Hall position during the entire movement stroke of the foot drive motor in the anti-pinch smart bed when the user uses it for the first time.

[0067] The real-time current acquisition module 200 is also used to detect the real-time current of the foot drive motor at the current Hall position when it is not used for the first time;

[0068] The current anti-pinch module 300 is also used to compare the real-time current of the foot with the foot reference current of the foot drive motor at the current Hall position, and to stop the foot drive motor from running when the comparison results are inconsistent.

[0069] Specifically, this embodiment can also be applied to anti-pinch smart beds with backrest and footrest lifting functions, and the footrest lifting anti-pinch function in the aforementioned embodiment can be achieved by comparing current.

[0070] In a preferred embodiment of the present invention, a back drive error is provided for the back drive motor; such as... Figure 3 The current anti-pinch module 300 shown includes:

[0071] The back anti-pinch unit 320 is used to calculate the back reference range based on the back reference current and back redundancy error of the back drive motor at the current Hall position, and then stop the back drive motor from running when the real-time back current does not belong to the real-time back reference range.

[0072] In a preferred embodiment of the present invention, a foot redundancy error is further provided for the foot drive motor, such as... Figure 3 The current anti-pinch module 300 shown also includes:

[0073] The foot anti-pinch unit 310 is used to calculate the foot reference range based on the foot reference current and foot redundancy error of the foot drive motor at the current Hall position, and then stop the foot drive motor when the real-time foot current does not belong to the real-time foot reference range.

[0074] Specifically, in a preferred embodiment of the present invention, foot redundancy error and back redundancy error are respectively set for the foot drive motor and the back drive motor, and the foot reference range and back reference range are calculated accordingly in the anti-pinch stop module.

[0075] In practical applications, motor current may fluctuate due to various factors (such as load changes, motor aging, and power supply voltage fluctuations). Setting redundancy errors allows for these normal current fluctuations without triggering a stop mechanism for every slight fluctuation. This allows the system to operate more stably while ensuring safety, reducing operational interruptions caused by false alarms.

[0076] Furthermore, different users, or even the same user in different states, may have different weight distributions and muscle tension levels. These differences can cause the motor to have different currents at the same Hall position. The redundancy error setting allows the system to adapt to these changes, ensuring safe and efficient operation even when there are different users or changes in user states.

[0077] Furthermore, by appropriately setting redundancy errors, the system can reduce unnecessary operational interruptions while ensuring safety, thereby improving the user experience. For example, when a user slightly adjusts their posture or places a light item on the bed, the system will not immediately stop operating, avoiding frequent interruptions and user inconvenience.

[0078] In summary, by setting redundant errors for the foot drive motor and back drive motor, and calculating the reference range accordingly in the anti-pinch stop module, not only is the system's fault tolerance and adaptability improved, but the user experience is also enhanced. This approach is a key innovation of this invention, providing strong protection for the safe operation of the smart bed.

[0079] In a preferred embodiment of the present invention, the anti-pinch smart bed is a double smart bed, such as... Figure 3 As shown, the reference current acquisition module 100 includes:

[0080] The left recording unit 110 is used to record the left foot reference current and the left back reference current corresponding to each Hall position during the entire movement stroke of the foot drive motor and the back drive motor when the user uses the bed for the first time and lies on the left side of the double smart bed.

[0081] The right-side recording unit 120 is used to record the reference current on the right side of the feet and the reference current on the right side of the back of the feet at each Hall position during the entire movement stroke of the foot drive motor and the back drive motor when the user uses the bed for the first time and lies on the right side of the double smart bed.

[0082] The bilateral recording unit 130 is used to record the bilateral reference current of the feet and the bilateral reference current of the back at each Hall position during the entire movement stroke of the foot drive motor and the back drive motor in the double smart bed when the user uses it for the first time and lies on both sides of the double smart bed.

[0083] When the anti-pinch stop module is not used for the first time, it detects the real-time foot current of the foot drive motor and the real-time back current of the back drive motor at the current Hall position. Then, it compares the real-time foot current with the reference current on the left side, right side, and both sides of the foot at the current Hall position. If the comparison results are inconsistent, it stops the foot drive motor. Similarly, it compares the real-time back current with the reference current on the left side, right side, and both sides of the back at the current Hall position. If the comparison results are inconsistent, it stops the back drive motor.

[0084] Specifically, in a preferred embodiment of the present invention, the anti-pinch system module designed for a double smart bed, through a left-side recording unit, a right-side recording unit, and bilateral recording units, allows the system to collect and record the reference current of the motor at different Hall effect positions for both sides of the double smart bed, as well as for situations where both sides are used simultaneously. This personalized data recording method ensures that the system provides accurate safety monitoring regardless of whether the user uses the left or right side of the bed alone or both sides simultaneously.

[0085] When not using the system for the first time, it not only compares the real-time current with the reference current on the corresponding side, but also considers the case of bilateral use. This means that even if someone is using one side while no one is using the other, the system can accurately judge and react, avoiding misjudgments or omissions that may occur due to unilateral use, thereby enhancing the accuracy and sensitivity of the anti-pinch function.

[0086] For smart double beds, users may need to choose to use one or both sides simultaneously based on personal preference or needs. The anti-pinch system of this invention can flexibly adapt to these different usage scenarios, ensuring users have a safe and comfortable experience in various situations.

[0087] By comprehensively considering both left and right side usage as well as bilateral use, the system can monitor the motor's operating status more comprehensively. Even if one motor malfunctions or malfunctions, the data from the other motor can provide additional reference information to the system, thereby improving the robustness and reliability of the entire system.

[0088] The anti-pinch system module of this invention not only meets the basic safety requirements of a double smart bed, but also promotes the innovation and development of smart bed technology through its personalized customization and flexible adaptability. This design concept and technical implementation method provide a valuable reference for future smart bed products.

[0089] In summary, the anti-pinch system module designed for a double smart bed in the preferred embodiment of the present invention has significant advantages in terms of personalization, accuracy, sensitivity, user experience, robustness, reliability, and technological innovation. These advantages enable the system module to better meet user needs and expectations, providing strong protection for the safe, comfortable, and convenient use of smart bed products.

[0090] In a preferred embodiment of the present invention, a first voltage sensing wire and a second voltage sensing wire are provided between the backrest and the bed frame, and between the footrest and the bed frame of the anti-pinch smart bed; the anti-pinch system also includes a sensing anti-pinch module 400, such as... Figure 3 The following are included:

[0091] The backrest sensing anti-pinch unit 410 is used to stop the backrest drive motor from running when the current between the first voltage sensing line and the second voltage sensing line between the backrest bed board and the bed frame changes.

[0092] The foot-sensing anti-pinch unit 420 is used to stop the foot drive motor from running when the current between the first voltage sensing line and the second voltage sensing line between the footboard and the bed frame changes.

[0093] In a preferred embodiment of the present invention, a first voltage sensing line and a second voltage sensing line are added between the backrest and the bed frame, and between the footrest and the bed frame of the anti-pinch smart bed, and a sensing stop module is also provided. This design has the following significant advantages:

[0094] By incorporating voltage sensing lines, the system can instantly detect changes in physical contact between the bed board and the bed frame, such as overlap (a foreign object simultaneously touches both the first and second voltage sensing lines) or compression (a foreign object touches one of the sensing lines, causing its side to extend and contact the adjacent sensing line). Once a change in current is detected, the sensing stop module responds quickly, halting the operation of the relevant drive motor, effectively preventing pinching injuries. This instantaneous response mechanism based on direct physical contact is faster and more reliable than indirect detection based on current fluctuations.

[0095] Traditional anti-pinch systems may primarily rely on current monitoring to identify potential hazards. However, this invention extends the safety monitoring range to the physical contact level between the bed board and the bed frame by introducing a voltage sensing wire. This multi-dimensional monitoring approach allows the system to identify potential safety hazards more comprehensively and accurately.

[0096] The inclusion of a voltage sensing line increases system redundancy. Even if the current monitoring section malfunctions or malfunctions, the system can still detect potential hazards through the voltage sensing line and take appropriate safety measures. This design improves the system's robustness and reliability, ensuring user safety.

[0097] Compared to systems that rely solely on current monitoring, the design of this invention, by combining voltage sensing lines and current monitoring, can more accurately identify genuine security threats. This helps reduce the risk of operational disruptions and degraded user experience due to false alarms.

[0098] Voltage sensing wires can typically be easily embedded in the structure between the bed board and the bed frame without adding extra complexity or cost. This design also facilitates subsequent maintenance and replacement.

[0099] By introducing a voltage sensing line and a sensing stop module, the anti-pinch system of this invention provides a more comprehensive and reliable safety guarantee for smart beds. This helps to enhance user trust and satisfaction with smart bed products and promotes the healthy development of the smart bed market.

[0100] In a preferred embodiment of the present invention, the backrest and footrest of the anti-pinch smart bed are provided with emergency stop ropes at the center of their bottom surfaces, such as... Figure 3 The system also includes an emergency stop module 500, which is connected to the foot drive motor and the back drive motor. This module is used to stop the operation of the foot drive motor and the back drive motor and maintain the locked state when either emergency stop cord is triggered. It also unlocks the foot drive motor and the back drive motor when either emergency stop cord is triggered while the foot drive motor and the back drive motor are locked.

[0101] Specifically, in a preferred embodiment of the present invention, the emergency stop module designed for the anti-pinch smart bed and the emergency stop pull rope located in its middle have the following significant advantages compared to the traditional push-button emergency stop:

[0102] The emergency stop cord is positioned near a potential location of mechanical injury, and the cord hangs naturally, allowing users to quickly pull on it in an emergency to immediately stop the foot and back drive motors. This design significantly improves emergency response speed and helps avoid or mitigate potential pinching risks at the first moment.

[0103] Traditional push-button emergency stop buttons are small and usually located in inaccessible places such as the backrest or footrest of the bed. In contrast, the emergency stop pull cord design is more user-friendly. Users don't need to search for or press a small button; a simple pull activates the emergency stop mechanism. This ease of use allows users to take safety measures more easily in emergency situations.

[0104] When the emergency stop cord is triggered, the emergency stop module not only immediately stops the operation of the foot drive motor and the back drive motor, but also maintains a locked state. This means that in an emergency, the motors will not only stop quickly, but will also be locked in a stopped state to prevent unauthorized restarting, thereby further enhancing the safety of the smart bed.

[0105] With the motor locked, even if external conditions change (such as power restoration or abnormal control signals), the motor will not start unexpectedly, thus avoiding potential secondary damage caused by motor restart. This is crucial for protecting users from potential harm.

[0106] The locking function also simplifies the troubleshooting and recovery process. Once the motor is locked, the user is fully aware that the system is safe and can focus on resolving the issue that caused the emergency stop. Once the problem is resolved, the motor can be easily restored to normal operation by triggering the emergency stop cord again (in the unlocked state).

[0107] Emergency stop ropes are typically designed for easy observation and inspection, allowing users or maintenance personnel to conveniently check their condition and integrity. This design helps to promptly identify and fix potential problems, ensuring the emergency stop mechanism is always in good working order.

[0108] The above are merely preferred embodiments of the present invention and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should recognize that any equivalent substitutions and obvious changes made using the content of this specification and illustrations should be included within the protection scope of the present invention.

Claims

1. An anti-pinch smart bed, comprising: The lifting unit, bed frame, and anti-pinch sensing line are characterized in that the anti-pinch sensing line includes a first voltage sensing line and a second voltage sensing line, the first voltage sensing line and the second voltage sensing line do not contact each other and alternately pass between the lifting unit and the bed frame, one end of the first voltage sensing line and the second voltage sensing line are respectively electrically connected to the control box, and the other end is in an open circuit state.

2. The anti-pinch smart bed according to claim 1, characterized in that, The first voltage sensing line and the second voltage sensing line are bare conductors, and there is a potential difference between the first voltage sensing line and the second voltage sensing line.

3. The anti-pinch smart bed according to claim 1, characterized in that, The lifting mechanism includes a backrest board and / or a footrest board.

4. The anti-pinch smart bed according to claim 1, characterized in that, The bed frame is equipped with a cable retractor. The other ends of the first voltage sensing wire and the second voltage sensing wire are housed within the cable retractor, which is a cable retractor box. The other ends of the first voltage sensing wire and the second voltage sensing wire are connected to an automatically retractable elastic element inside the cable retractor box; or The winding device is a winding reel, and the other ends of the first voltage sensing wire and the second voltage sensing wire are connected to a tension sensor installed inside the winding reel.

5. The anti-pinch smart bed according to claim 4, characterized in that, When the lifting unit rises, the anti-pinch sensing line is pulled out from the retracting device; when the lifting unit descends, the anti-pinch sensing line is retracted into the retracting device.

6. The anti-pinch smart bed according to claim 1, characterized in that, The lifting part is provided with multiple first hooks, and the bed frame is provided with multiple second hooks. The anti-pinch sensing line alternately passes through the first hooks and the second hooks.

7. The anti-pinch smart bed according to claim 1, characterized in that, An emergency stop rope is provided in the middle of the bottom surface of the lifting unit.

8. An anti-pinch system for an anti-pinch smart bed, characterized in that, The anti-pinch smart bed as described in any one of claims 1-7, wherein the lifting part of the anti-pinch smart bed includes a backrest board, the backrest board is provided with a backrest drive motor, and the anti-pinch system includes: A reference current acquisition module, connected to the back drive motor, is used to record the back reference current corresponding to each Hall position of the back drive motor during the entire movement stroke of the anti-pinch smart bed when the user uses it for the first time. A real-time current acquisition module, connected to the reference current acquisition module, is used to detect the real-time back current of the back drive motor at the current Hall position when it is not used for the first time. The current anti-pinch module is connected to the real-time current acquisition module and is used to compare the real-time back current with the back reference current of the back drive motor at the current Hall position. If the comparison results are inconsistent, the back drive motor is stopped from running. An anti-pinch sensor module, connected to the back drive motor, is used to control the back drive motor to stop lifting when the anti-pinch sensor line is touched by an object.

9. The anti-pinch system according to claim 8, characterized in that, The lifting part of the anti-pinch smart bed also includes a footboard, which is equipped with a foot drive motor; The reference current acquisition module is also connected to the foot drive motor and is also used to record the foot reference current corresponding to each Hall position of the foot drive motor during the entire movement stroke of the anti-pinch smart bed when the user uses it for the first time. The real-time current acquisition module is also used to detect the real-time current of the foot drive motor at the current Hall position when the foot is not used for the first time. The current anti-pinch module is also used to compare the real-time current of the foot with the foot reference current of the foot drive motor at the current Hall position, and to stop the foot drive motor from running when the comparison results are inconsistent.

10. The anti-pinch system according to claim 8, characterized in that, It also includes a storage module for saving a preset back drive error corresponding to the back drive motor; The current anti-pinch module includes: The back anti-pinch unit is used to calculate the back reference range based on the back reference current and the back redundancy error of the back drive motor at the current Hall position, and then stop the operation of the back drive motor when the real-time back current does not belong to the back reference range.

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