CN108294890B - Double-acting rotating speed controllable shifter - Google Patents
Double-acting rotating speed controllable shifter Download PDFInfo
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- CN108294890B CN108294890B CN201710022332.3A CN201710022332A CN108294890B CN 108294890 B CN108294890 B CN 108294890B CN 201710022332 A CN201710022332 A CN 201710022332A CN 108294890 B CN108294890 B CN 108294890B
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- driving
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- 230000007246 mechanism Effects 0.000 claims abstract description 98
- 239000000725 suspension Substances 0.000 claims abstract description 17
- 230000005540 biological transmission Effects 0.000 claims abstract description 15
- 239000000523 sample Substances 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 5
- 230000000474 nursing effect Effects 0.000 abstract description 9
- 230000007547 defect Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 4
- 230000033001 locomotion Effects 0.000 description 10
- 239000003814 drug Substances 0.000 description 5
- 229940079593 drug Drugs 0.000 description 5
- 210000003141 lower extremity Anatomy 0.000 description 5
- 206010033799 Paralysis Diseases 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 208000014674 injury Diseases 0.000 description 4
- 230000001737 promoting effect Effects 0.000 description 4
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- 208000016285 Movement disease Diseases 0.000 description 2
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- 238000005516 engineering process Methods 0.000 description 2
- 210000003414 extremity Anatomy 0.000 description 2
- 208000012260 Accidental injury Diseases 0.000 description 1
- 206010010356 Congenital anomaly Diseases 0.000 description 1
- 208000032140 Sleepiness Diseases 0.000 description 1
- 206010041349 Somnolence Diseases 0.000 description 1
- 230000003288 anthiarrhythmic effect Effects 0.000 description 1
- 230000003257 anti-anginal effect Effects 0.000 description 1
- 230000003178 anti-diabetic effect Effects 0.000 description 1
- 230000003276 anti-hypertensive effect Effects 0.000 description 1
- 239000003416 antiarrhythmic agent Substances 0.000 description 1
- 239000003472 antidiabetic agent Substances 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229940124579 cold medicine Drugs 0.000 description 1
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- 208000020431 spinal cord injury Diseases 0.000 description 1
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- 210000001364 upper extremity Anatomy 0.000 description 1
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
- A61G7/10—Devices for lifting patients or disabled persons, e.g. special adaptations of hoists thereto
- A61G7/1013—Lifting of patients by
- A61G7/1017—Pivoting arms, e.g. crane type mechanisms
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
- A61G7/10—Devices for lifting patients or disabled persons, e.g. special adaptations of hoists thereto
- A61G7/1025—Lateral movement of patients, e.g. horizontal transfer
Abstract
A double-acting rotating speed controllable shifter comprises a running mechanism, a lifting cantilever beam, a rotary suspension mechanism, an anti-collision mechanism, a control mechanism and a mobile phone with an app program. The invention provides an electric and manual driving mechanical structure, wherein the two driving modes can be independently installed and simultaneously installed, and can be switched in real time without interference when the two driving modes are simultaneously installed. The invention is convenient for power failure and application in humid environment, thereby avoiding the defects of simple manual (hydraulic) transmission or simple motor driving. And when using electric control, still can apply intelligent control technique, through the easy operation of cell-phone APP procedure and wireless bluetooth technique, realize patient autonomous control's removal and rotation in order to realize patient self-shifting, of course also can satisfy nursing staff's other accuse mode control shifter and realize patient's other accuse shift.
Description
Technical Field
The invention relates to nursing equipment, in particular to a double-acting rotating speed controllable shifter.
Background
Disability of the lower limbs and lumbar vertebrae is particularly common due to physical congenital or acquired disability, wherein paralysis of the lower limbs is a disease in which, after spinal cord injury is caused by various reasons, sensation, movement, reflex and the like of bilateral limbs are lost below the injury plane to cause movement disorder or loss, and paralysis of the lower limbs is a common disease in limb disability. In daily care, paralyzed lower limb patients often have a need for displacement, such as moving and indexing to a wheelchair or seat on a bed, or from a wheelchair to a toilet or bathtub, etc.
Traditional patient moving modes are often carried out manually by means of external force of other people (caregivers), on one hand, secondary injuries to patients are easy to cause in the freehand moving process, and on the other hand, the caregivers often cause own injuries when independently moving the patients. The shift machine realizes the safe transfer of paralyzed patients with injured legs or feet or old people among beds, wheelchairs, seats and toilets, greatly reduces the working intensity of nursing staff, improves the nursing efficiency and reduces the nursing risk. The patient can be supported and moved by using the shifting machine instead of manual labor, the shifting equipment is used for shifting, so that time and labor are saved, the patient can be quickly, safely and remotely moved, the manpower and the burden of a caretaker are reduced, the moving range of the patient is enlarged, the willingness of the patient to go out is increased, the patient is more comfortable, and the patient is maintained in the same time.
At present, various shifting devices exist at home and abroad, however, the investigation finds that the existing shifting machine has the following main defects:
(1) the operation of the shifter must be performed by a nursing staff, and the patient cannot independently operate and control the shifter, namely, the shifter only reduces the physical expenditure of the nursing staff, and when the patient is not cared by the patient, the patient cannot autonomously control the shifter to realize the shifting. In addition, for patients with lower limb dysfunction, the muscle strength of the upper limb of the patient still can exist and has better functions, but when the patient uses a conventional shifter, if the patient also has to be operated by medical staff, the residual functions of the patient can not be fully utilized, social resources are saved, and the waste of resources is also caused in the aspect of reducing the family burden;
(2) the lifting rod of the shifter is mainly powered by electricity, has high cost and is limited in use for some villages which are frequently powered off in China;
(3) the existing shifter is large in polyvalent and expensive, particularly the price of the shifter imported abroad, and more economic embarrassment is brought to families of patients with heavy burden;
(4) because the existing shifter is only designed to be operated by medical staff, no intelligent safety protection system exists, even if an emergency stop button exists in the electric shifter, if the medical staff is not operated properly, the risk of accidental injury such as touching of a patient is increased; or the electric displacement motor can not be operated due to the interruption of the power supply, and the situation that the patient can not be put down also happens sometimes.
(5) The existing shifter adopts a manual mode for moving and rotating, so that medical staff can easily cause sudden start and stop of the shifter, psychological fear and shikim collision negligence are caused for patients, and especially for elderly people, patients taking medicines causing dizziness, somnolence, movement disorder, imbalance and distraction, such as antihypertensive medicines, antiarrhythmic medicines, antianginal medicines, antidiabetic medicines, cold medicines and the like.
Therefore, how to properly deal with the above problems is an important research topic for current patient shift.
Disclosure of Invention
The invention aims to solve the problems and provide a double-acting type rotating speed controllable shifter.
In order to achieve the above purpose, the present invention is realized by the following technical scheme: a double-acting type rotating speed controllable shifter comprises a running mechanism, a lifting cantilever beam, a rotary suspension mechanism, an anti-collision mechanism, a control mechanism and a mobile phone with an app program, wherein the lifting mechanism is arranged on the running mechanism and can be lifted up and down; the rotary suspension mechanism is fixedly connected with the lifting cantilever beam through a cantilever beam tail end connecting piece, and the anti-collision mechanism is arranged on the running mechanism; the control mechanism is arranged on the lifting mechanism to control the actions of the running mechanism, the lifting mechanism and the rotary hanging mechanism, and the mobile phone is connected with the control mechanism in a wireless communication way by a person.
The running mechanism comprises a base, a front universal small wheel, a rear universal small wheel and a driving guide wheel, wherein the front universal small wheel, the rear universal small wheel and the driving guide wheel are arranged on the base, the driving guide wheel is respectively arranged on two sides of the middle of the base, and the front universal small wheel and the rear universal small wheel are respectively arranged on four corners of the base.
The driving guide wheel comprises a driving motor and a guide wheel, the driving motor is arranged below the base, and the guide wheel is in transmission connection with the driving motor.
The lifting mechanism comprises a fixed arm, a telescopic arm, an electric push rod, a pneumatic cylinder, an electric push rod sliding seat and a pneumatic cylinder sliding seat; the fixed arm is installed on the base of running mechanism, and flexible arm and fixed arm activity cup joint link to each other and with promote cantilever beam swing joint, and electric putter and pneumatic cylinder's lower extreme links to each other with the fixed arm is articulated respectively, and electric putter's upper end is slided the seat through electric putter and is slided and link to each other with promoting the cantilever beam, and pneumatic cylinder's upper end is slided the seat through pneumatic cylinder and is slided and link to each other with promoting the cantilever beam.
The electric push rod sliding seat and the pneumatic cylinder sliding seat are respectively provided with locking screws, and the electric push rod sliding seat or the pneumatic cylinder sliding seat can be locked on the lifting cantilever beam through the locking screws.
The lifting cantilever beam comprises a section of cross rod and a section of inclined rod, the lower end of the inclined rod is fixedly connected with the rotary suspension mechanism through a cantilever beam end connecting piece, two grooves are formed in the cross rod, and an electric push rod sliding seat and a pneumatic cylinder sliding seat in the lifting mechanism are respectively connected in the two grooves and can slide back and forth along the grooves.
The rotary suspension mechanism comprises a gear box, a stepping motor arranged above the gear box, a driving gear and a driven gear arranged in the gear box and a bearing hook connected below the gear box; the driving gear is connected with the stepping motor in a transmission way, the driven gear is connected with the driving gear in a transmission way, and the bearing hook is connected with the driven gear in a transmission way and can rotate under the drive of the driven gear.
The anti-collision mechanism comprises a wide-angle infrared ranging probe, the wide-angle infrared ranging probe is connected with a control circuit board electric signal in the control mechanism, and when the wide-angle infrared ranging probe measures that the distance between obstacles is smaller than a set value, the control circuit board is used for locking and driving the guide wheel, so that the running mechanism is locked, and accidental collision is prevented.
The control mechanism comprises an electric appliance box, and a wireless receiving and transmitting Bluetooth module and a control circuit board are arranged in the electric appliance box.
The anti-collision device also comprises a control handle, wherein a wireless receiving and transmitting Bluetooth module is arranged in the control handle, is connected with an electric appliance box of the control mechanism in a wireless communication manner, controls the displacement of the running mechanism, the lifting of the lifting mechanism and the rotation of the rotary suspension mechanism through the control mechanism, and can carry out acousto-optic warning on signals fed back by the anti-collision mechanism.
Due to the adoption of the technical scheme, the invention has the following advantages and characteristics:
(1) the invention applies the intelligent control technology, can simply operate the mechanical movement of the whole machine body through the mobile phone APP program and the wireless Bluetooth technology, and comprises the following steps: the nursing device can directly move, turn, lift, rotate and the like in any direction, fully utilizes the residual functions of the body of the patient, controls the shifter to realize the nursing experience without a second person, meets the psychological demands of the patient on self care and life self care, and returns to society. Moreover, because the machine body movement of the shifter is accurately controlled by software, a slow start-stop program control mode can be adopted, and the defect of sudden start-stop of medical staff is avoided.
(2) The invention provides two modes of pneumatic transmission and electric driving to complete the important mechanical movement for lifting the patient, and avoids the defects of hydraulic transmission or single motor driving adopted in the prior products. The manual operation under the condition of no electricity can be realized, and the manual operation is used as a coping scheme when the electric quantity is accidentally exhausted, and is safe and reliable and exquisite in design.
(3) The rotary hanging mechanism can rotate by 360 degrees and is positioned at the positions of 0 degrees and 180 degrees, so that a patient can turn around on the front and back sides, and the patient can conveniently sit in a seat by rotating the body direction after moving above a toilet and a wheelchair.
(4) According to the invention, when the infrared range finder is arranged on the base, and a patient is about to collide with a wall or an object due to remote control misoperation, the range finder gives a warning prompt and starts the caster braking device, and meanwhile, the rubber material at the edge of the base also plays a role in buffering, so that the patient and the body are protected.
(5) The rotary suspension mechanism provided by the invention realizes that the stepping motor accurately programs the bearing hook below the stepping motor through the gear box, realizes slow start and stop of a patient during rotation, avoids abrupt start and stop of the shifter, and overcomes the defects of psychological fear and shikim-hit negligence caused by the manual rotation of the patient by the conventional shifter.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic side elevational view of the present invention;
FIG. 3 is a schematic view of the bottom construction of the present invention;
FIG. 4 is a fade control signal, fade control speed, controlling movement and rotation in the present invention;
fig. 5 is a schematic view of the effect of the present invention in use.
Detailed Description
See fig. 1, with reference to fig. 2 and 3. The invention relates to a double-acting rotating speed controllable shifter, which comprises a running mechanism 1, a lifting mechanism 2, a lifting cantilever beam 3, a rotary suspension mechanism 4, an anti-collision mechanism 5, a control mechanism 6 and a mobile phone with an app program, wherein the lifting mechanism is arranged on the running mechanism and can lift up and down; the rotary suspension mechanism is fixedly connected with the lifting cantilever beam through a cantilever beam tail end connecting piece 7, and the anti-collision mechanism is arranged on the running mechanism; the control mechanism is arranged on the lifting mechanism to control the actions of the running mechanism, the lifting mechanism and the rotary hanging mechanism, and the mobile phone is connected with the control mechanism in a wireless communication way by a person.
The running mechanism 1 comprises a base 11, a front universal small wheel 12, a rear universal small wheel 13 and a driving guide wheel 14 which are arranged on the base, wherein the driving guide wheel is respectively arranged on two sides of the middle of the base, and the front universal small wheel and the rear universal small wheel are respectively arranged on four corners of the base. The driving guide wheel 14 comprises a driving motor 141 and a guide wheel 142, the driving motor is arranged below the base, and the guide wheel is in transmission connection with the driving motor.
The lifting mechanism 2 in the invention comprises a fixed arm 21, a telescopic arm 22, an electric push rod 23, a pneumatic cylinder 24, an electric push rod sliding seat 25 and a pneumatic cylinder sliding seat 26; the fixed arm is installed on the base of running mechanism, and flexible arm and fixed arm activity cup joint link to each other and with promote cantilever beam swing joint, and electric putter and pneumatic cylinder's lower extreme links to each other with the fixed arm is articulated respectively, and electric putter's upper end is slided the seat through electric putter and is slided and link to each other with promoting the cantilever beam, and pneumatic cylinder's upper end is slided the seat through pneumatic cylinder and is slided and link to each other with promoting the cantilever beam. The electric push rod sliding seat 25 and the pneumatic cylinder sliding seat 26 are respectively provided with locking screws 27 and 28, and the electric push rod sliding seat or the pneumatic cylinder sliding seat can be locked on the lifting cantilever beam through the locking screws.
The lifting cantilever beam 3 comprises a section of cross rod and a section of inclined rod, the lower end of the inclined rod is fixedly connected with a rotary suspension mechanism through a cantilever beam tail end connecting piece 7, a front groove 31 and a rear groove 32 are formed in the cross rod, and an electric push rod sliding seat and a pneumatic cylinder sliding seat in the lifting mechanism are respectively connected in the front groove and the rear groove and can slide back and forth along the grooves.
The rotary suspension mechanism 4 in the invention comprises a gear box 41, a stepping motor 42 arranged above the gear box, a driving gear 43 and a driven gear 44 arranged in the gear box and a bearing hook 45 connected below the gear box; the driving gear is connected with the stepping motor in a transmission way, the driven gear is connected with the driving gear in a transmission way, and the bearing hook is connected with the driven gear in a transmission way and can rotate under the drive of the driven gear.
The anti-collision mechanism 5 comprises a wide-angle infrared ranging probe, the wide-angle infrared ranging probe is electrically connected with a control circuit board in the control mechanism, and when the wide-angle infrared ranging probe measures that the distance between obstacles is smaller than a set value, the control circuit board locks and drives a guide wheel to lock the running mechanism, so that accidental collision is prevented.
The control mechanism 6 in the invention comprises an electric box, wherein the electric box is arranged on a fixed arm of the lifting mechanism, and a wireless Bluetooth module, a control circuit board and a mobile phone app program are arranged in the electric box.
Referring to fig. 4 and 5, the present invention controls the movement of the whole machine and controls the rotation of the bearing hooks 45 of the rotary suspension mechanism 4 by gradual change signals, that is, the signal intensity, the moving speed and the rotating speed are gradually increased from zero to a specified intensity and the highest rotating speed, and then move at a uniform speed for a period of time, and then when the target is reached, the signal intensity and the moving speed are reduced to zero.
Referring to fig. 5, the control handle of the invention is internally provided with a wireless bluetooth module which is mutually communicated with the electric box of the control mechanism 6 to control the displacement of the whole machine, the lifting of the lifting mechanism 2 and the rotation of the bearing hooks 45 in the rotary hanging mechanism 4, and can carry out acousto-optic warning on the signals fed back by the anti-collision mechanism 5. The control handle can be replaced by a common mobile phone, and the mobile phone itself comprises a Bluetooth communication module, so that software app programs can be used for controlling the mobile phone, and the software and hardware control and alarm display functions of the control handle are realized.
The working principle of the invention is as follows:
(1) Patient-autonomously controlled movement and rotation, i.e. patient-self-shifting mode
Under the condition of electricity, the electric push rod sliding seat 25 is locked, the pneumatic cylinder sliding seat 26 is free to release and can slide freely along the groove, and taking the patient moving from the bed surface to the wheelchair as an example, see fig. 5:
firstly, the mobile phone app or the control handle is used for remote control, the mobile phone app or the control handle is connected with the control circuit board through a Bluetooth module, a command is issued in the app, a signal is transmitted to the control circuit board, the whole machine is controlled to a proper position at the bedside and a proper angle, then the electric push rod 23 of the lifting mechanism 2 is controlled to perform piston movement, the lifting cantilever beam 3 is lowered, and the rotary suspension mechanism 4 at the front end of the lifting cantilever beam is lowered;
secondly, the patient turns over and lies on the sling, and then the sling is connected with the sling and the hanging ring, so that the hanging ring is hung on the bearing hook 45 of the rotary hanging mechanism 4;
again, the lifting cantilever beam 3 is lifted by the lifting mechanism 2, so that the patient is lifted off the bed surface,
finally, the whole machine is controlled to move to a required position, the wheelchair is aligned, a patient is put down, the sling is pulled out, the patient sits on the wheelchair, and the patient drives off the shifter.
(2) Patient he controls the shifting machine to shift the patient
Except that medical personnel operate mobile phone app according to mode (1), realize that patient's other accuse mode shifts, under electroless condition, slide the support locking to the pneumatic cylinder, release electric putter and slide the seat, make electric putter slide the seat and can freely slide along the recess, by external inflating device, the manual drive pneumatic cylinder is the piston motion, can make the lifting cantilever beam lift in certain limit equally. The movement and direction adjustment of the shifter are realized by the hand pushing of medical staff, and the mode is that the patient moves in a manual mode to realize the shifting.
Claims (6)
1. A double-acting type rotating speed controllable shifter is characterized in that: the mobile phone comprises a running mechanism, a lifting cantilever beam, a rotary suspension mechanism, an anti-collision mechanism, a control mechanism and a mobile phone with an app program, wherein the lifting mechanism is arranged on the running mechanism and can lift up and down; the rotary suspension mechanism is fixedly connected with the lifting cantilever beam through a cantilever beam tail end connecting piece, and the anti-collision mechanism is arranged on the running mechanism; the control mechanism is arranged on the lifting mechanism to control the actions of the running mechanism, the lifting mechanism and the rotary hanging mechanism, and the mobile phone is in wireless communication connection with the control mechanism through the control of a person;
the lifting mechanism comprises a fixed arm, a telescopic arm, an electric push rod, a pneumatic cylinder, an electric push rod sliding seat and a pneumatic cylinder sliding seat; the fixed arm is arranged on the base of the running mechanism, the telescopic arm is movably sleeved and connected with the fixed arm and is movably connected with the lifting cantilever beam, the lower ends of the electric push rod and the pneumatic cylinder are respectively hinged and connected with the fixed arm, the upper end of the electric push rod is slidably connected with the lifting cantilever beam through the electric push rod sliding seat, and the upper end of the pneumatic cylinder is slidably connected with the lifting cantilever beam through the pneumatic cylinder sliding seat;
the electric push rod sliding seat and the pneumatic cylinder sliding seat are respectively provided with locking screws, and the electric push rod sliding seat or the pneumatic cylinder sliding seat can be locked on the lifting cantilever through the locking screws;
the lifting cantilever beam comprises a section of cross rod and a section of inclined rod, the lower end of the inclined rod is fixedly connected with the rotary suspension mechanism through a cantilever beam end connecting piece, two grooves are formed in the cross rod, and an electric push rod sliding seat and a pneumatic cylinder sliding seat in the lifting mechanism are respectively connected in the two grooves and can slide back and forth along the grooves.
2. The double-acting type rotating speed controllable shifter according to claim 1, wherein: the running mechanism comprises a base, a front universal small wheel, a rear universal small wheel and a driving guide wheel, wherein the front universal small wheel, the rear universal small wheel and the driving guide wheel are arranged on the base, the driving guide wheel is respectively arranged on two sides of the middle of the base, and the front universal small wheel and the rear universal small wheel are respectively arranged on four corners of the base.
3. A double-acting rotary speed controllable shifter according to claim 2, wherein: the driving guide wheel comprises a driving motor and a guide wheel, the driving motor is arranged below the base, and the guide wheel is in transmission connection with the driving motor.
4. The double-acting type rotating speed controllable shifter according to claim 1, wherein: the rotary suspension mechanism comprises a gear box, a stepping motor arranged above the gear box, a driving gear and a driven gear arranged in the gear box and a bearing hook connected below the gear box; the driving gear is connected with the stepping motor in a transmission way, the driven gear is connected with the driving gear in a transmission way, and the bearing hook is connected with the driven gear in a transmission way and can rotate under the drive of the driven gear.
5. The double-acting type rotating speed controllable shifter according to claim 1, wherein: the anti-collision mechanism comprises a wide-angle infrared ranging probe, the wide-angle infrared ranging probe is connected with a control circuit board electric signal in the control mechanism, and when the wide-angle infrared ranging probe measures that the distance between obstacles is smaller than a set value, the control circuit board is used for locking and driving the guide wheel, so that the running mechanism is locked, and accidental collision is prevented.
6. The double-acting type rotating speed controllable shifter according to claim 1, wherein: the control mechanism comprises an electric appliance box, and a wireless receiving and transmitting Bluetooth module and a control circuit board are arranged in the electric appliance box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710022332.3A CN108294890B (en) | 2017-01-12 | 2017-01-12 | Double-acting rotating speed controllable shifter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710022332.3A CN108294890B (en) | 2017-01-12 | 2017-01-12 | Double-acting rotating speed controllable shifter |
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| CN108294890A CN108294890A (en) | 2018-07-20 |
| CN108294890B true CN108294890B (en) | 2024-02-27 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109009797A (en) * | 2018-09-14 | 2018-12-18 | 周靖皓 | A kind of swimming pool shift unit help the disabled of helping the elderly |
| CN109350410A (en) * | 2018-12-14 | 2019-02-19 | 辽宁福之卉科技发展有限公司 | A kind of intelligence shift equipment |
| CN110279244B (en) * | 2019-07-08 | 2022-03-01 | 重庆大学 | Auxiliary seat for regional sports |
| US11540965B2 (en) | 2019-11-21 | 2023-01-03 | Liko Research & Development Ab | Lifting devices positionable in high range positions and low range positions |
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