WO2014048075A1 - 升降式病床 - Google Patents

升降式病床 Download PDF

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Publication number
WO2014048075A1
WO2014048075A1 PCT/CN2013/070093 CN2013070093W WO2014048075A1 WO 2014048075 A1 WO2014048075 A1 WO 2014048075A1 CN 2013070093 W CN2013070093 W CN 2013070093W WO 2014048075 A1 WO2014048075 A1 WO 2014048075A1
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WO
WIPO (PCT)
Prior art keywords
bed
connecting rod
leg
hinged
bed base
Prior art date
Application number
PCT/CN2013/070093
Other languages
English (en)
French (fr)
Inventor
李路平
Original Assignee
Li Luping
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Li Luping filed Critical Li Luping
Priority to US14/378,899 priority Critical patent/US9629767B2/en
Publication of WO2014048075A1 publication Critical patent/WO2014048075A1/zh

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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
    • A61G7/002—Beds specially adapted for nursing; Devices for lifting patients or disabled persons having adjustable mattress frame
    • A61G7/018—Control or drive mechanisms
    • 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
    • A61G1/00—Stretchers
    • A61G1/02—Stretchers with wheels
    • A61G1/0206—Stretchers with wheels characterised by the number of supporting wheels if stretcher is extended
    • A61G1/0212—2 pairs having wheels within a pair on the same position in longitudinal direction, e.g. on the same axis
    • 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
    • A61G1/00—Stretchers
    • A61G1/04—Parts, details or accessories, e.g. head-, foot-, or like rests specially adapted for stretchers
    • A61G1/052—Struts, spars or legs
    • A61G1/056—Swivelling legs
    • A61G1/0562—Swivelling legs independently foldable, i.e. at least part of the leg folding movement is not simultaneous
    • 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
    • A61G13/00—Operating tables; Auxiliary appliances therefor
    • A61G13/02—Adjustable operating tables; Controls therefor
    • A61G13/04—Adjustable operating tables; Controls therefor tiltable around transverse or longitudinal axis
    • 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
    • A61G13/00—Operating tables; Auxiliary appliances therefor
    • A61G13/02—Adjustable operating tables; Controls therefor
    • A61G13/06—Adjustable operating tables; Controls therefor raising or lowering of the whole table surface
    • 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
    • A61G7/002—Beds specially adapted for nursing; Devices for lifting patients or disabled persons having adjustable mattress frame
    • A61G7/005—Beds specially adapted for nursing; Devices for lifting patients or disabled persons having adjustable mattress frame tiltable around transverse horizontal axis, e.g. for Trendelenburg position
    • 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
    • A61G7/002—Beds specially adapted for nursing; Devices for lifting patients or disabled persons having adjustable mattress frame
    • A61G7/012—Beds specially adapted for nursing; Devices for lifting patients or disabled persons having adjustable mattress frame raising or lowering of the whole mattress frame
    • 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
    • A61G7/002—Beds specially adapted for nursing; Devices for lifting patients or disabled persons having adjustable mattress frame
    • A61G7/015—Beds specially adapted for nursing; Devices for lifting patients or disabled persons having adjustable mattress frame divided into different adjustable sections, e.g. for Gatch position

Definitions

  • the invention relates to a hospital bed.
  • the common hinge structure is adopted between the connecting rod and the bed leg of the existing hospital bed, and the longitudinal displacement during the process of retracting the bed leg can not be compensated, and the longitudinal position of the bed leg to the ground relative to the bed is changed.
  • This brings about the overall movement of the bed. Since the bed is placed in one end of the wall, the legs that are usually far away from the wall are forced to retreat, accompanied by continuous vibration. This phenomenon usually causes discomfort to the patient. Especially for critically ill patients, the body is full of various tubes, and the impediment caused by the movement of the bed can cause serious consequences and affect rehabilitation. However, for various reasons, the bed must be able to lift and lower according to the specific requirements of the medical measures. How to reduce the displacement of the leg during the lifting process and to maintain the stability of the patient's posture and position has been a problem in the technical field.
  • the present invention provides a lifting bed which is kept stationary relative to the longitudinal position of the bed during the lifting process.
  • the lift-type bed of the present invention comprises a bed base frame, wherein the bed base frame is symmetric according to a transverse mid-section and a longitudinal mid-section, the bed base has a leg leg at both ends thereof, and the bed leg The bottom end of the rod is hinged to a first roller device in contact with the ground, characterized by:
  • a second roller device is coupled to the upper end of the bed leg, and the second roller device is slidable in a track on the bed base, the track being parallel to the longitudinal of the bed base Axis
  • the bed leg rod is hinged with a connecting rod;
  • an inverting mechanism for changing the angle between the bed leg and the bed base, to lift the bed base
  • the turning mechanism comprising the connecting rod and the thrust mechanism, the thrust mechanism
  • the end of the rod is rotated by a hinged four-bar mechanism, and the connecting rod drives the bed leg to be reversed relative to the bed base to realize the lifting and lowering of the bed.
  • the thrust mechanism is a first worm gear mechanism driven by a motor
  • the push rod is a worm of the first worm gear mechanism
  • the hinged four-bar mechanism includes a first round tube and a second round tube hinged on the bed base frame, and the first round tube is closer to the middle portion of the bed base frame than the second round tube, a connecting rod is fixed on the first round tube, the second connecting rod is fixed on the second round tube, and a connecting rod is hinged between the first connecting rod and the second connecting rod, the connecting rod The upper end is consolidated with the second tube, and the push rod is hinged to the first connecting rod.
  • the guide rails are inclined at a high end and a low middle at both ends of the bed base frame.
  • the bed plate laid on the bed base frame is connected with a second turning mechanism
  • the power device of the second turning mechanism is a second worm gear mechanism
  • the first worm gear mechanism and the second worm gear mechanism The control terminals are all connected to a central controller, and the central controller is connected to a signal input device.
  • the invention presents a bilaterally symmetrical, symmetrical structure.
  • the turbine drives the worm to extend or retract.
  • the front end drive link of the worm is turned over with respect to the bed base frame, so that the link pulls the bed leg to reverse. Because the upper end of the bed leg can be
  • the longitudinal displacement in the bed frame base compensates for the longitudinal displacement of the bed leg at the ground end during the standing and leveling process, so that the ground end of the bed leg remains stationary relative to the longitudinal position of the bed.
  • the force arm of the thrust mechanism pushing the connecting rod is lengthened, so that the thrust of the thrust mechanism can be gradually increased during the raising of the bed.
  • Reduced, motor power can be reduced. The reduction in motor power allows the installation of smaller power motors while extending the life of the motor while reducing production costs.
  • the inclined design of the guide rail facilitates the closeness of the bed leg to the bed base frame at the lowest state of the bed, reducing the overall thickness and reducing the occupation of the storage space.
  • the invention has the advantages that: the longitudinal position of the bed leg is not fixed relative to the hospital bed, which is favorable for the patient to maintain stability during the lifting process, and is beneficial to treatment and rehabilitation; secondly, the motor power can be reduced during the process of raising the bed, which is beneficial to the patient. Extend the life of the motor and reduce the cost; Finally, the thickness in the folded state is small, saving storage space.
  • Figure 1 is a schematic view of the invention in a raised state
  • FIG. 2 is a schematic view of the present invention in a descending state
  • Figure 3 is a schematic view showing the structure of the present invention in a raised state
  • Figure 4 is a partial enlarged view of Figure 3
  • Figure 5 is a perspective view of the present invention in a lowered state.
  • Figure 6 is a partial enlarged view of Figure 5
  • Figure 7 is a schematic illustration of the use of the invention in a tilted state.
  • Figure 8 is a perspective view showing the structure of the present invention in a descending state at another viewing angle.
  • the lifting bed of the present invention comprises a bed base 1 which is symmetrical according to a lateral mid-section and a longitudinal mid-section, and the bed base 1 has a leg rod 2 at both ends thereof.
  • the bottom end of the bed leg 2 is hinged to a first roller device 3 in contact with the ground, characterized in that:
  • the second roller device 4 is connected to the upper end of the bed leg 2, and the second roller device 4 is slidable in the track 5 on the bed base 1, the track 5 being parallel to the The longitudinal axis of the bed base 1;
  • the bed leg 2 is hinged with a connecting rod 6;
  • an inverting mechanism for changing the angle between the bed leg 2 and the bed base 1 to lift the bed base 1
  • the turning mechanism comprising the connecting rod 6 and the thrust mechanism
  • the end of the thrust mechanism drives the connecting rod 6 to rotate by a hinged four-bar mechanism 7, and the connecting rod drives the bed leg 2 to flip relative to the bed base 1 to realize the lifting of the bed.
  • the thrust mechanism is a first worm gear mechanism 10 driven by a motor, and the push rod is a worm of the first worm gear mechanism 10.
  • the hinged four-bar mechanism includes a first circular tube 71 and a second circular tube 72 hinged on the bed base 1 , and the first circular tube 71 is closer to the bed base 1 than the second circular tube 72
  • the first connecting rod 73 is fixed on the first round pipe 71
  • the second connecting rod 74 is fixed on the second round pipe 72, between the first connecting rod 73 and the second connecting rod 74
  • a link 75 is hinged, and the upper end of the connecting rod 6 is fixed to the second round tube 72, and the push rod is hinged to the first connecting rod 73.
  • the guide rail 5 is formed in an inclined manner at both ends of the bed base frame 1 at a high height and a middle portion.
  • the bed plate 8 laid on the bed base 1 is connected with a second turning mechanism, the power device of the second turning mechanism is a second worm gear mechanism 9, the first worm gear mechanism 10 and The control end of the second worm gear mechanism 9 is connected to a central controller, and the central controller is connected to a signal input device.
  • the bed can be raised or lowered by manual operation on the signal input device, and the bed legs on both sides can be raised or lowered at the same time, and the one-side bed legs can be raised and lowered to adjust the inclination of the bed.
  • the invention basically does not move the bed leg during the lifting process, and can ensure the patient's posture is stable. After lowering the height, the overall thickness can be reduced to facilitate storage and reduce space occupation.
  • the content described in the embodiments of the present specification is merely an enumeration of the implementation forms of the inventive concept, and the scope of the protection of the present invention should not be construed as being limited to the specific forms stated in the embodiments, and the scope of protection of the present invention is also in the field. Equivalent technical means that a skilled person can conceive according to the inventive concept.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Nursing (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Rehabilitation Therapy (AREA)
  • Invalid Beds And Related Equipment (AREA)

Abstract

升降式病床，包括床板基架（1），所述的床板基架（1）依照横向中分面和纵向中分面对称，所述床板基架（1）两端有床腿杆（2），所述的床腿杆（2）的底端铰接于与地面接触的第一滚轮装置（3），所述的床腿杆（2）的上端连接有第二滚轮装置（4），所述的第二滚轮装置（4）可滑行于所述的床板基架（1）上的轨道（5）中，所述的轨道（5）平行于所述的床板基架（1）的纵轴线；所述的床腿杆（2）上铰接有连杆（6）；还设有一个用于改变所述的床腿杆（2）与床板基架（1）的夹角、以升降床板基架（1）的翻转机构，所述的翻转机构包括所述的连杆（6）和推力机构，所述的推力机构的端部通过一铰链四杆机构（7）带动所述的连杆（6）旋转，所述的连杆（6）带动所述的床腿杆（2）相对于所述床板基架（1）翻转，实现病床的升降。

Description

升降式病床
(一） 技术领域
本发明涉及一种病床。
(二） 背景技术
现有病床的连杆与床腿杆之间采用普通铰接结构， 床腿杆收放过程中 的纵向位移无法得到补偿， 床腿杆着地端相对于病床的纵向位置就要发生 改变。 由此带来病床整体的移动。 由于病床的安放方式都是一端顶墙， 因 此在通常远离墙的床腿都被迫后退， 伴随着连续的振动。 这一现象通常给 病人带来不适。 尤其对于危重病人， 身上插满了各种管子， 病床移动带来 的牵连会引起严重的后果， 影响康复。 然而由于种种原因， 病床必须能够 按照医疗措施的具体要求进行升降。 如何在升降过程中减小床腿的位移， 保持病人姿态和位置的平稳， 一直是本技术领域的难题。
(三） 发明内容
为克服已有病床在升降过程中床腿移动的缺点， 本发明要提供一种在 升降过程中床腿相对病床的纵向位置保持不动的升降病床。
本发明所述的升降式病床， 包括床板基架， 所述的床板基架依照横向 中分面和纵向中分面对称， 所述床板基架两端有床腿杆， 所述的床腿杆的 底端铰接于与地面接触的第一滚轮装置， 其特征在于：
所述的床腿杆的上端连接有第二滚轮装置， 所述的第二滚轮装置可滑 行于所述的床板基架上的轨道中， 所述的轨道平行于所述的床板基架的纵 轴线； 所述的床腿杆上铰接有连杆；
还设有一个用于改变所述的床腿杆与床板基架的夹角、 以升降床板基 架的翻转机构，所述的翻转机构包括所述的连杆和推力机构， 所述的推力机 构的端部通过一铰链四杆机构带动所述的连杆旋转， 所述的连杆带动所述 的床腿杆相对于所述床板基架翻转， 实现病床的升降。
进一步， 所述的推力机构是电机带动的第一涡轮蜗杆机构， 所述的推 杆是所述的第一涡轮蜗杆机构的蜗杆。
进一步， 所述的铰链四杆机构包括铰接在所述的床板基架上的第一圆 管和第二圆管， 第一圆管比第二圆管靠近所述的床板基架的中部， 第一连 架杆固结在第一圆管上， 第二连架杆固结在第二圆管上， 第一连架杆与第 二连架杆之间铰接有联杆， 所述的连杆的上端与所述的第二圆管固结， 所 述的推杆铰接于所述的第一连架杆。
进一步， 所述的导轨呈现在床板基架两端高、 中间低的倾斜状。
更进一步， 所述的床板基架上铺设的床板连接有第二翻转机构， 所述 第二翻转机构的动力装置是第二涡轮蜗杆机构， 所述的第一涡轮蜗杆机构 和第二涡轮蜗杆机构的控制端都连接一中央控制器， 所述的中央控制器连 接一信号输入装置。
本发明呈现左右对称、 前后对称的结构。 病床的前端和后端的两侧各 有一个床腿杆， 每个床腿杆各有一个与之配合的连杆； 同一端的两侧的连 杆之间通过横杆连接， 所述的推力机构与所述的横杆铰接。
当电机转动带动涡轮， 涡轮驱动蜗杆前伸或后縮。 蜗杆的前端驱动连 杆相对于床板基架翻转， 于是连杆牵动床腿杆翻转。 由于床腿杆的上端可 以在床板基架中纵向移动， 补偿了床腿杆着地端在立起和放平过程中的纵 向位移， 使得床腿杆的着地端相对于病床的纵向位置保持不动。
另外， 本发明在升起过程中， 由于连杆相对于床板基架的角度的加大， 推力机构推动连杆翻转的力臂得到加长， 因此在病床升起过程中， 推力机 构的推力可以逐步减小， 电机功率可以减小。 而电机功率的减小， 可以安 装较小功率的电机， 同时延长电机寿命， 同时减低生产成本。
导轨的倾斜设计有利于床腿杆在床的最低状态时紧贴床板基架， 减小 整体厚度， 减小存储空间的占用。
本发明的优点是： 床腿着地端的纵向位置相对于病床保持不动， 有利 于升降过程中病人保持平稳， 有利于治疗和康复； 其次， 病床升起过程中 电机功率的可以减小， 有利于延长电机寿命， 减低成本； 最后在折叠状态 的厚度小， 节省存储空间。
(四） 附图说明
图 1为本发明在升起状态的示意图
图 2为为本发明在下降状态的示意图
图 3是本发明在升起状态的结构示意图
图 4是图 3的局部放大图
图 5是本发明在下降状态的立体示意图。
图 6是图 5的局部放大图
图 7是本发明在倾斜状态下使用的示意图。
图 8是本发明在下降状态的、 在另一视角下的结构立体示意图
(五） 具体实施方式 下面结合附图对本发明作进一步描述。 参照附图：
本发明所述的升降式病床， 包括床板基架 1， 所述的床板基架 1依照横 向中分面和纵向中分面对称， 所述床板基架 1两端有床腿杆 2， 所述的床腿 杆 2的底端铰接于与地面接触的第一滚轮装置 3， 其特征在于：
所述的床腿杆 2的上端连接有第二滚轮装置 4， 所述的第二滚轮装置 4 可滑行于所述的床板基架 1上的轨道 5中， 所述的轨道 5平行于所述的床 板基架 1的纵轴线；
所述的床腿杆 2上铰接有连杆 6;
还设有一个用于改变所述的床腿杆 2与床板基架 1的夹角、 以升降床 板基架 1的翻转机构,所述的翻转机构包括所述的连杆 6和推力机构， 所述 的推力机构的端部通过一铰链四杆机构 7带动所述的连杆 6旋转， 所述的 连杆带动所述的床腿杆 2相对于所述床板基架 1翻转， 实现病床的升降。
所述的推力机构是电机带动的第一涡轮蜗杆机构 10， 所述的推杆是所 述的第一涡轮蜗杆机构 10的蜗杆。
所述的铰链四杆机构包括铰接在所述的床板基架 1上的第一圆管 71和 第二圆管 72， 第一圆管 71比第二圆管 72靠近所述的床板基架 1的中部， 第一连架杆 73固结在第一圆管 71上， 第二连架杆 74固结在第二圆管 72 上， 第一连架杆 73与第二连架杆 74之间铰接有联杆 75， 所述的连杆 6的 上端与所述的第二圆管 72固结， 所述的推杆铰接于所述的第一连架杆 73。
所述的导轨 5呈现在床板基架 1两端高、 中间低的倾斜状。
所述的床板基架 1上铺设的床板 8连接有第二翻转机构， 所述第二翻 转机构的动力装置是第二涡轮蜗杆机构 9， 所述的第一涡轮蜗杆机构 10和 第二涡轮蜗杆机构 9 的控制端都连接一中央控制器， 所述的中央控制器连 接一信号输入装置。
通过在信号输入装置上的手动操作可以升起或降低病床， 可以将两侧 的床腿杆同时升起或下降， 也可以升降单侧床腿杆， 以调节病床的倾斜度。
本发明在升降过程中床腿基本不移动， 可以保证病人体态平稳。 在降 低高度后， 可以将整体厚度减小， 便于存储， 减小空间占用。 本说明书实施例所述的内容仅仅是对发明构思的实现形式的列举， 本 发明的保护的范围不应当被视为仅限于实施例所陈述的具体形式， 本发明 的保护范围也及于本领域技术人员根据本发明构思所能够想到的等同技术 手段。

Claims

权 利 要 求 书
1. 升降式病床， 包括床板基架， 所述的床板基架依照横向中分 面和纵向中分面对称， 所述床板基架两端有床腿杆， 所述的床腿杆的 底端铰接于与地面接触的第一滚轮装置， 其特征在于：
所述的床腿杆的上端连接有第二滚轮装置，所述的第二滚轮装置 可滑行于所述的床板基架上的轨道中，所述的轨道平行于所述的床板 基架的纵轴线；
所述的床腿杆上铰接有连杆；
还设有一个用于改变所述的床腿杆与床板基架的夹角、以升降床 板基架的翻转机构,所述的翻转机构包括所述的连杆和推力机构， 所 述的推力机构的端部通过一铰链四杆机构带动所述的连杆旋转，所述 的连杆带动所述的床腿杆相对于所述床板基架翻转， 实现病床的升 降。
2.如权利要求 1所述的升降式病床， 其特征在于： 所述的推力机 构是电机带动的涡轮蜗杆机构，所述的推杆是所述的涡轮蜗杆机构的 蜗杆。
3.如权利要求 1或 2所述的升降式病床， 其特征在于： 所述的铰 链四杆机构包括铰接在所述的床板基架上的第一圆管和第二圆管，第 一圆管比第二圆管靠近所述的床板基架的中部，第一连架杆固结在第 一圆管上， 第二连架杆固结在第二圆管上， 第一连架杆与第二连架杆 之间铰接有联杆， 所述的连杆的上端与所述的第二圆管固结， 所述的 推杆铰接于所述的第一连架杆。
4.如权利要求 3所述的升降式病床， 其特征在于： 本发明呈现左 右对称、前后对称的结构。病床的前端和后端的两侧各有一个床腿杆， 每个床腿杆各有一个与之配合的连杆；同一端的两侧的连杆之间通过 横杆连接， 所述的推力机构与所述的横杆铰接。
5.如权利要求 4所述的升降式病床， 其特征在于： 所述的导轨呈 现在床板基架两端髙、 中间低的倾斜状。
6.如权利要求 5所述的升降式病床， 其特征在于： 所述的床板基 架上铺设的床板连接有第二翻转机构，所述第二翻转机构的动力装置 是第二涡轮蜗杆机构，所述的第一涡轮蜗杆机构和第二涡轮蜗杆机构 的控制端都连接一中央控制器，所述的中央控制器连接一信号输入装 置。
PCT/CN2013/070093 2012-09-27 2013-01-06 升降式病床 WO2014048075A1 (zh)

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