Intelligent lifting bed and control method thereof

文档序号:1677795 发布日期:2020-01-03 浏览:32次 中文

阅读说明:本技术 一种智能升降床及其控制方法 (Intelligent lifting bed and control method thereof ) 是由 程磊 冯智涛 于 2019-10-12 设计创作,主要内容包括:一种智能升降床,包括框架、床体、升降闭合机构和单边挂板,还包括通讯模块和控制模块;所述框架为竖向设置的四边形框架,所述升降闭合机构包括转动安装于所述框架,所述升降闭合机构外侧的钢索均以水平的方式固定安装有单边挂板,所述单边挂板沿着所述框架的两根立柱滑动,所述床体的一端的两侧分别固定安装于所述单边挂板;升降闭合机构还包括钢索推拉机构,钢索推拉机构用于拉动钢索;升降闭合机构安装有配重组件;通讯模块与控制模块电连接,控制模块与驱动机构电连接;通讯模块用于接收命令,并将命令发送至控制模块;控制模块用于接收通讯模块发送的命令,识别命令之后发送信号至驱动机构。该装置可以通过遥控的方式控制。(An intelligent lifting bed comprises a frame, a bed body, a lifting closing mechanism, a single-side hanging plate, a communication module and a control module; the lifting closing mechanism comprises a steel cable, a frame, a lifting frame and a lifting frame, wherein the frame is a vertically-arranged quadrilateral frame, the lifting closing mechanism comprises a steel cable which is rotatably installed on the frame, unilateral hanging plates are fixedly installed on the steel cable at the outer side of the lifting closing mechanism in a horizontal mode, the unilateral hanging plates slide along two stand columns of the frame, and two sides of one end of the bed body are fixedly installed on the unilateral hanging plates respectively; the lifting closing mechanism also comprises a steel cable push-pull mechanism, and the steel cable push-pull mechanism is used for pulling the steel cable; the lifting closing mechanism is provided with a counterweight component; the communication module is electrically connected with the control module, and the control module is electrically connected with the driving mechanism; the communication module is used for receiving the command and sending the command to the control module; the control module is used for receiving the command sent by the communication module and sending a signal to the driving mechanism after recognizing the command. The device can be controlled by remote control.)

1. An intelligent lifting bed is characterized by comprising a frame, a bed body, a lifting closing mechanism, a single-side hanging plate, a communication module and a control module;

the frame is a vertically arranged quadrilateral frame, the lifting closing mechanism comprises an upper left closing pulley rotatably mounted at the upper left end of the frame, an upper left guide pulley is rotatably mounted at the lower right side of the upper left closing pulley, a lower left closing pulley block is mounted at the lower left end of the frame, and an upper right closing pulley, an upper right guide pulley and a lower right closing pulley block are respectively arranged at the right side of the frame in an axisymmetric manner;

the steel cable is guided to the right side from the upper left closed pulley to the upper right closed pulley block through the upper right guide pulley, is diverted to the upper right closed pulley through the lower right closed pulley block, is diverted to the upper left guide pulley through the upper right guide pulley, is phase-changed to the lower left closed pulley block through the upper left guide pulley, and is finally diverted to the upper left closed pulley block through the lower left closed pulley block to form a closed loop;

the steel cables outside the lifting closing mechanism are fixedly provided with unilateral hanging plates in a horizontal mode, the unilateral hanging plates slide along the two upright posts of the frame, and two sides of one end of the bed body are fixedly arranged on the unilateral hanging plates respectively;

the lifting closing mechanism further comprises a steel cable push-pull mechanism, and the steel cable push-pull mechanism is used for pulling the steel cable;

the lifting closing mechanism is provided with a counterweight component;

the communication module is electrically connected with the control module, and the control module is electrically connected with the driving mechanism;

the communication module is used for receiving the command and sending the command to the control module;

the control module is used for receiving the command sent by the communication module and sending a signal to the driving mechanism after recognizing the command.

2. The intelligent lifting bed according to claim 1, wherein the counterweight assembly comprises a left counterweight guide pulley, a right counterweight guide pulley, and a counterweight block, the left counterweight guide pulley rotatably mounted to the upper cross beam of the frame, the left counterweight guide pulley positioned between the upper left closing pulley and the upper cross beam central axis;

the left counterweight guide pulley is rotatably provided with a right counterweight guide pulley at a position which is symmetrical by taking the central axis of the upper cross beam as a reference axis;

the counterweight block is respectively installed through a left counterweight steel cable and a right counterweight steel cable, one end of the left counterweight steel cable is fixed at the left end of the counterweight block, and the counterweight block turns to a single-side hanging plate which is fixed at the right side below the counterweight block after passing through a left counterweight guide wheel and a right upper closed pulley;

one end of the right counterweight steel cable is fixed at the right end of the counterweight block, and the right counterweight steel cable turns to the lower part through the right counterweight guide wheel and the upper left closed pulley and is fixed on the left unilateral hanging plate.

3. The intelligent lifting bed as claimed in claim 2, wherein the counterweight block comprises a placing box and a counterweight unit, the left counterweight steel cable and the right counterweight steel cable are connected to the placing box, and a plurality of counterweight units are placed in the placing box in a horizontally stacked manner.

4. The intelligent lifting bed as claimed in claim 3, wherein the central axis of the placing box and the central axis of the frame are located on the same axis;

the center axis of the placing box and the center of the counterweight unit are both provided with guide holes, the center axis of the frame vertically guides the steel cable from top to bottom, and the guide steel cable penetrates through the guide holes.

5. The intelligent lifting bed as claimed in claim 1, wherein the standing columns on both sides of the frame are C-shaped in cross section, and the openings of the standing columns face to the outside;

the unilateral hanging plate comprises a sliding plate, a plurality of pulleys are mounted on the plate surface of the sliding plate, the pulleys are located in the cylinder of the station upright post, rotating shafts of the pulleys are mounted on the sliding plate outside the cylinder of the station upright post through openings, and balls or rollers are rotatably mounted on the pulleys facing the side surface of the station upright post;

the pulley is accommodated in the cavity of the station column, and the wheel surface of the pulley is in contact with the inner surface of the station column.

6. The intelligent lifting bed according to claim 5, wherein a fixing plate for fixing a bed is mounted at the front end of the unilateral hanging plate;

the steel cable installation device is fixedly installed at the upper end and the lower end of the sliding plate and comprises a screw rod and a screw rod installation block, the screw rod installation block is fixedly installed on the sliding plate, the screw rod and the screw rod installation block are in threaded fit, and a steel cable installation hole is formed in one end of the screw rod installation block.

7. The intelligent lifting bed according to claim 6, wherein the cable push-pull mechanism comprises a lead screw motor, a lifting lead screw and a lead screw slider;

the lifting screw rod is arranged at the upper end and the lower end of the frame in a rotating mode, the lifting screw rod is in threaded fit with the screw rod sliding block, and the screw rod motor drives the lifting screw rod to rotate.

8. The intelligent lifting bed according to claim 1, wherein the communication module comprises a remote control module, a Bluetooth module and a voice module;

the remote control module is used for receiving a remote control command and sending the command to the control module;

the Bluetooth module is used for receiving a Bluetooth command and sending the command to the control module;

the voice module is used for receiving a voice command and sending the command to the control module;

and the signal output ends of the remote control module, the Bluetooth module and the voice module are respectively communicated with the control module.

9. A control method of an intelligent lifting bed is characterized by comprising the following steps:

step A: the communication module sends a signal to the control module, and the control module receives the signal;

and B: the control module matches the signals and sends the matched signals to the driving mechanism;

and C: the screw motor receives signals and drives the lifting and closing mechanism to operate;

step D: the control module senses the rotation turns of the screw rod motor, judges whether the preset height is reached or not, and stops the screw rod motor after the preset height is reached;

step E: the screw motor receives the stop signal and stops rotating, and the conveying module immediately stops rotating;

step F: the lead screw motor is a direct current motor, the control module acquires a motor current curve, the number of turns of the motor and the rotating speed, the direct current motor is stopped after the current curve exceeds a preset safety threshold, motor parameters are collected through multiple dimensions, and algorithm setting and analysis calculation are carried out, so that the judgment and safety protection of the motor state are realized.

Technical Field

The invention relates to the technical field of furniture, in particular to an intelligent lifting bed and control thereof.

Background

The bed is bedding used for sleeping and is usually placed on the ground, common beds are divided into a flat bed and a double-layer bed, the double-layer bed occupies a small area and strives for an upper-layer space, and the flat-layer bed is only one layer.

The existing furniture development methods are various, one of the directions is to fully use indoor space, the technology is mostly applied to small house type houses, and the bed is used as furniture with larger occupied space, the space potential of the bed is larger, and a series of storage and release technologies surrounding the bed are generated.

The bed adopts the lift mode to accomodate and is most suitable, and the bed is motionless, descends to ground when using, rises to upper space when not using, and the space is utilized to the peak shift, can fine utilization limited indoor space.

Disclosure of Invention

In view of the above-mentioned drawbacks, the present invention provides a lifting bed, which has a portable lifting structure to lift the bed, so as to achieve the effect of using space reasonably, and the device can be controlled in a remote control manner.

In order to achieve the purpose, the invention adopts the following technical scheme:

an intelligent lifting bed comprises a frame, a bed body, a lifting closing mechanism, a single-side hanging plate, a communication module and a control module;

the frame is a vertically arranged quadrilateral frame, the lifting closing mechanism comprises an upper left closing pulley rotatably mounted at the upper left end of the frame, an upper left guide pulley is rotatably mounted at the lower right side of the upper left closing pulley, a lower left closing pulley block is mounted at the lower left end of the frame, and an upper right closing pulley, an upper right guide pulley and a lower right closing pulley block are respectively arranged at the right side of the frame in an axisymmetric manner;

the steel cable is guided to the right side from the upper left closed pulley to the upper right closed pulley block through the upper right guide pulley, is diverted to the upper right closed pulley through the lower right closed pulley block, is diverted to the upper left guide pulley through the upper right guide pulley, is phase-changed to the lower left closed pulley block through the upper left guide pulley, and is finally diverted to the upper left closed pulley block through the lower left closed pulley block to form a closed loop;

the steel cables outside the lifting closing mechanism are fixedly provided with unilateral hanging plates in a horizontal mode, the unilateral hanging plates slide along the two upright posts of the frame, and two sides of one end of the bed body are fixedly arranged on the unilateral hanging plates respectively;

the lifting closing mechanism further comprises a steel cable push-pull mechanism, and the steel cable push-pull mechanism is used for pulling the steel cable;

the lifting closing mechanism is provided with a counterweight component;

the communication module is electrically connected with the control module, and the control module is electrically connected with the driving mechanism;

the communication module is used for receiving the command and sending the command to the control module;

the control module is used for receiving the command sent by the communication module and sending a signal to the driving mechanism after recognizing the command.

Preferably, the counterweight assembly comprises a left counterweight guide pulley, a right counterweight guide pulley and a counterweight, the left counterweight guide pulley is rotatably mounted on the upper cross beam of the frame, and the left counterweight guide pulley is located between the left upper closing pulley and the central axis of the upper cross beam;

the left counterweight guide pulley is rotatably provided with a right counterweight guide pulley at a position which is symmetrical by taking the central axis of the upper cross beam as a reference axis;

the counterweight block is respectively installed through a left counterweight steel cable and a right counterweight steel cable, one end of the left counterweight steel cable is fixed at the left end of the counterweight block, and the counterweight block turns to a single-side hanging plate which is fixed at the right side below the counterweight block after passing through a left counterweight guide wheel and a right upper closed pulley;

one end of the right counterweight steel cable is fixed at the right end of the counterweight block, and the right counterweight steel cable turns to the lower part through the right counterweight guide wheel and the upper left closed pulley and is fixed on the left unilateral hanging plate.

Preferably, the counterweight block comprises a placing box and counterweight units, the left counterweight steel cable and the right counterweight steel cable are connected to the placing box, and the counterweight units are placed in the placing box in a horizontally stacked mode.

Preferably, the central axis of the placing box and the central axis of the frame are located on the same axis;

the center axis of the placing box and the center of the counterweight unit are both provided with guide holes, the center axis of the frame vertically guides the steel cable from top to bottom, and the guide steel cable penetrates through the guide holes.

Furthermore, the cross section of the standing column on the two sides of the frame is C-shaped, and the opening of the standing column faces outwards;

the unilateral hanging plate comprises a sliding plate, a plurality of pulleys are mounted on the plate surface of the sliding plate, the pulleys are located in the cylinder of the station upright post, rotating shafts of the pulleys are mounted on the sliding plate outside the cylinder of the station upright post through openings, and balls or rollers are rotatably mounted on the pulleys facing the side surface of the station upright post;

the pulley is accommodated in the cavity of the station column, and the wheel surface of the pulley is in contact with the inner surface of the station column.

Furthermore, a fixing plate for fixing a bed is arranged at the front end of the unilateral hanging plate;

the steel cable installation device is fixedly installed at the upper end and the lower end of the sliding plate and comprises a screw rod and a screw rod installation block, the screw rod installation block is fixedly installed on the sliding plate, the screw rod and the screw rod installation block are in threaded fit, and a steel cable installation hole is formed in one end of the screw rod installation block.

Furthermore, the steel cable push-pull mechanism comprises a screw motor, a lifting screw and a screw sliding block;

the lifting screw rod is arranged at the upper end and the lower end of the frame in a rotating mode, the lifting screw rod is in threaded fit with the screw rod sliding block, and the screw rod motor drives the lifting screw rod to rotate.

Furthermore, the communication module comprises a remote control module, a Bluetooth module and a voice module;

the remote control module is used for receiving a remote control command and sending the command to the control module;

the Bluetooth module is used for receiving a Bluetooth command and sending the command to the control module;

the voice module is used for receiving a voice command and sending the command to the control module;

and the signal output ends of the remote control module, the Bluetooth module and the voice module are respectively communicated with the control module.

A control method of an intelligent lifting bed comprises the following steps:

step A: the communication module sends a signal to the control module, and the control module receives the signal;

and B: the control module matches the signals and sends the matched signals to the driving mechanism;

and C: the screw motor receives signals and drives the lifting and closing mechanism to operate;

step D: the control module senses the rotation turns of the screw rod motor, judges whether the preset height is reached or not, and stops the screw rod motor after the preset height is reached;

step E: the screw motor receives the stop signal and stops rotating, and the conveying module immediately stops rotating;

step F: the lead screw motor is a direct current motor, the control module acquires a motor current curve, the number of turns of the motor and the rotating speed, the direct current motor is stopped after the current curve exceeds a preset safety threshold, motor parameters are acquired through multiple dimensions, and algorithm setting and analysis calculation are carried out, so that the motor state is judged and safety protection is realized

The invention has the beneficial effects that: the lifting closing mechanism used in the scheme winds a closed steel cable into an X-shaped lifting structure with synchronism, when the lifting closing mechanism is used, as long as the steel cable moves, the lifting of two fixed points of a lifting bed is synchronous, the stability of the lifting bed is kept, the lifting bed can work by driving the steel cable to slide by adopting a group of lifting mechanisms, and the counterweight assembly is used for reducing the torque required during lifting; after the communication module and the control module are added, the device can receive the control command through the communication module, and the obtained control command is processed by the control module and then controls the equipment, so that the equipment can adapt to more control modes.

Drawings

FIG. 1 is a schematic view of the internal structure of a frame of one embodiment of the present invention;

FIG. 2 is a schematic structural view of a lift closure mechanism according to one embodiment of the present invention;

FIG. 3 is a schematic diagram of the overall structure of one embodiment of the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

FIG. 5 is a flow chart of a method of use of one embodiment of the present invention.

Wherein: the lifting and closing mechanism 100, the upper left closing pulley 110, the upper left guide pulley 120, the lower left closing pulley block 130, the upper right closing pulley 140, the upper right guide pulley 150, the lower right closing pulley block 160, the bed body 200, the frame 300, the single-side hanging plate 400, the sliding plate 410, the pulley 420, the fixing plate 430, the steel cable push-pull mechanism 500, the lead screw motor 510, the lifting lead screw 520, the lead screw sliding block 530, the counterweight assembly 600, the left counterweight guide pulley 610, the right counterweight guide pulley 620 and the counterweight block 630.

Detailed Description

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

As shown in fig. 1-4, an intelligent lifting bed comprises a frame 300, a bed body 200, a lifting closing mechanism 100, a single-side hanging plate 400, a communication module and a control module;

the frame 300 is a vertically arranged quadrilateral frame, the lifting closing mechanism 100 comprises an upper left closing pulley 110 rotatably mounted at the upper left end of the frame 300, an upper left guide pulley 120 rotatably mounted at the lower right side of the upper left closing pulley 110, a lower left closing pulley block 130 mounted at the lower left end of the frame 300, and an upper right closing pulley 140, an upper right guide pulley 150 and a lower right closing pulley block 160 are respectively arranged at the right side of the frame 300 in an axisymmetric manner;

the steel cable passes through the upper right guide pulley 150 to the lower right closing pulley block 160 from the upper left closing pulley 110 to the right side, is diverted to the upper right closing pulley 140 from the lower right closing pulley block 160, is diverted to the upper left guide pulley 120 through the upper right guide pulley 150, is phase-changed to the lower left closing pulley block 130 through the upper left guide pulley 120, and is finally diverted to the upper left closing pulley 110 through the lower left closing pulley block 130 to form a closed loop;

the steel cables outside the lifting closing mechanism 100 are fixedly provided with single-side hanging plates 400 in a horizontal mode, the single-side hanging plates 400 slide along the two upright posts of the frame 300, and two sides of one end of the bed body 200 are fixedly arranged on the single-side hanging plates 400 respectively;

the lifting closing mechanism 100 further comprises a steel cable push-pull mechanism 500, wherein the steel cable push-pull mechanism 500 is used for pulling a steel cable;

the lifting and closing mechanism 100 is provided with a counterweight assembly 600;

the communication module is electrically connected with the control module, and the control module is electrically connected with the driving mechanism;

the communication module is used for receiving the command and sending the command to the control module;

the control module is used for receiving the command sent by the communication module and sending a signal to the driving mechanism after recognizing the command.

The lifting closing mechanism 100 used in the scheme winds a closed steel cable into a synchronous lifting structure, when in use, as long as the steel cable moves, the lifting of two fixed points of the lifting bed is synchronous, the stability of the lifting bed is kept, the lifting bed can work by adopting a group of lifting mechanisms to drive the steel cable to slide, and the counterweight assembly is used for reducing the torque required during lifting; after the communication module and the control module are added, the device can receive the control command through the communication module, and the obtained control command is processed by the control module and then controls the equipment, so that the equipment can adapt to more control modes.

The counterweight assembly 600 comprises a left counterweight guide pulley 610, a right counterweight guide pulley 620 and a counterweight block 630, wherein the left counterweight guide pulley 610 is rotatably mounted on the upper cross beam of the frame 300, and the left counterweight guide pulley 610 is located between the upper left closing pulley 110 and the central axis of the upper cross beam;

the left counterweight guide pulley 610 is rotatably provided with a right counterweight guide pulley 620 at a position which is symmetrical by taking the central axis of the upper cross beam as a reference axis;

the counterweight block 630 is respectively installed through a left counterweight steel cable and a right counterweight steel cable, one end of the left counterweight steel cable is fixed at the left end of the counterweight block 630, and the counterweight block is turned to the unilateral hanging plate 400 fixed at the right side below the counterweight block through the left counterweight guide pulley 610 and the upper right closed pulley 140;

one end of the right counterweight steel cable is fixed at the right end of the counterweight block 630, and the right counterweight steel cable turns to the unilateral hanging plate 400 fixed at the left side below after passing through the right counterweight guide wheel 620 and the upper left closed pulley 110.

The installation of balancing weight 630 has reduced the required moment when going up and down, and the mounting means of elevator utilizes the dead weight cooperation of balancing weight smooth left counter weight guide pulley 610 and right counter weight guide pulley 620 guide placed in the middle, guarantees that balancing weight and lift closing mechanism are difficult for appearing skew phenomenon.

The counterweight block 630 includes a placement box and counterweight units, the left counterweight steel cable and the right counterweight steel cable are connected to the placement box, and the counterweight units are placed in the placement box in a horizontally stacked manner.

The counter weight of balancing weight adopts the mode setting of little unit, and weight change is nimble, easily adjusts and uses.

Wherein the central axis of the placing box and the central axis of the frame 300 are located on the same axis;

the central axis of the placing box and the center of the counterweight unit are both provided with guide holes, the central axis of the frame 300 is vertically guided by a steel cable from top to bottom, and the guided steel cable passes through the guide holes.

The arrangement of the guide steel cable restrains the whole counterweight block 630, and further ensures that the counterweight block cannot displace.

In addition, the standing pillars on both sides of the frame 300 have a C-shaped cross section, and the openings of the standing pillars face outward;

the unilateral hanging plate 400 comprises a sliding plate 410, a plurality of pulleys 420 are mounted on the plate surface of the sliding plate 410, the pulleys 420 are positioned in the cylinder of the station upright column, the rotating shaft of each pulley 420 is mounted on the sliding plate 410 outside the cylinder of the station upright column through an opening, and balls or rollers are rotatably mounted on the pulleys 420 towards the side surface of the station upright column;

the pulley 420 is received in a cavity of the station column, and a tread of the pulley 420 is in contact with an inner surface of the station column.

The pulleys 420 of the unilateral hanging plate 400 slide along the strip-shaped openings of the standing columns, that is, the lifting direction of the whole lifting bed is restricted, the lifting direction of the lifting bed is guided by the standing columns, and the lifting bed intelligently moves up and down under normal conditions, so that the balance and stability of the whole system are ensured; the side of the pulley 420 is provided with balls and rollers to ensure that sliding contact rather than surface-to-surface friction occurs after the side of the pulley 420 is in contact with the inner surface of the standing post, thereby preventing resistance generated by lifting and protecting the pulley 420.

In addition, a fixing plate 430 for fixing a bed is installed at the front end of the unilateral hanging plate 400;

the upper end and the lower end of the sliding plate 410 are fixedly provided with a steel cable installation device, the steel cable installation device comprises a screw rod and a screw rod installation block, the screw rod installation block is fixedly arranged on the sliding plate 410, the screw rod and the screw rod installation block are in threaded fit, and one end of the screw rod installation block is provided with a steel cable installation hole.

The steel cable installation scheme provided by the scheme ensures that the steel cable can be conveniently and accurately adjusted when needing fine adjustment, and after the adjustment is carried out, the device is not easy to loosen through thread assembly.

In addition to the above technology, the wire rope push-pull mechanism 500 includes a lead screw motor 510, a lifting lead screw 520, and a lead screw slider 530;

the lead screw slider 530 is installed on the sliding plate 410, the lifting lead screw 520 is disposed in a vertical state, both ends of the lifting lead screw 520 are rotatably installed on the upper end and the lower end of the frame 300, the lifting lead screw 520 is in threaded fit with the lead screw slider 530, and the lead screw motor 510 drives the lifting lead screw 520 to rotate.

The lifting device is lifted through the electric mechanism, so that the device is more convenient to use, and the bed has the anti-falling effect and the safety is improved by utilizing the characteristic of the lead screw.

In addition, the communication module comprises a remote control module, a Bluetooth module and a voice module;

the remote control module is used for receiving a remote control command and sending the command to the control module;

the Bluetooth module is used for receiving a Bluetooth command and sending the command to the control module;

the voice module is used for receiving a voice command and sending the command to the control module;

and the signal output ends of the remote control module, the Bluetooth module and the voice module are respectively communicated with the control module.

A control method of an intelligent lifting bed comprises the following steps:

step A: the communication module sends a signal to the control module, and the control module receives the signal;

and B: the control module matches the signals and sends the matched signals to the driving mechanism;

and C: the screw motor receives signals and drives the lifting and closing mechanism to operate;

step D: the control module senses the rotation turns of the screw rod motor, judges whether the preset height is reached or not, and stops the screw rod motor after the preset height is reached;

step E: the screw motor receives the stop signal and stops rotating, and the conveying module immediately stops rotating;

step F: the lead screw motor is a direct current motor, the control module acquires a motor current curve, the number of turns of the motor and the rotating speed, the direct current motor is stopped after the current curve exceeds a preset safety threshold, motor parameters are collected through multiple dimensions, and algorithm setting and analysis calculation are carried out, so that the judgment and safety protection of the motor state are realized.

Because the core function of the lifting bed is the change of two states of lifting and lowering, the device is controlled by the communication module, mainly the lead screw motor is controlled to control the rotation turns of the lead screw motor, so as to achieve the effect of controlling the lifting stroke; the communication module can be with the voice command special delivery who gathers to control module in, find corresponding control command in the voice command storehouse of prestoring by control module to control the lead screw motor, drive the articulated synchronizing structure of X and go up and down to the bed body, again by the current curve control, realize preventing the safety protection measure of pressing from both sides, make whole device convenient more and safe in the use.

The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.

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