JPS5841947Y2 - Bedsore correction mechanism for bed with reclining mechanism - Google Patents

Description

[Detailed Description of the Invention] The purpose of the present invention is to correct pressure sores that occur on a bed having a reclining mechanism.

Conventionally, beds with reclining backboards have been widely used for long-term care patients, physically disabled people, and bedridden elderly people. This allows the user to freely select between a sleeping state and a sitting state without any help from the user.

However, if the backboard is simply reclined, pressure sores will occur between the human body and the floorboard, resulting in various inconveniences.

In other words, the central axis of rotation of the backboard for reclining and the axis of lumbar bending and extension of the human body are vertically misaligned, and for this reason, when the backboard is erected, the head rises and the backboard is placed at a predetermined position. There are disadvantages such as the pillow being displaced from the back of the head, and furthermore, the patient feels a feeling of oppression in the abdomen, increasing discomfort.

This will be further explained in detail with reference to the drawings.

FIG. 1 is a simplified diagram showing a sleeping state, and FIG. 2 is a simplified diagram showing a sitting state, where MAN is the human body, 2 is the floorboard of the bed, 1 is the backboard, and 1. Also, L is the ischial joint axis, and M
is the back of the head and N is the buttocks.

The relative positions of the ischial joint axis L, the back of the head M, and the buttocks N are determined by the bed user, and these parts are
As shown in FIG. 1, the human body forms a scalene triangle when sleeping.

In addition, when the back plate 1 is erected by performing a reclining motion, the upper body of the bed user is raised, so that the inner angle <
MLN gradually increases, and when the internal angle < MLN becomes 180°, the head becomes most protruding (see Figure 2).

Therefore, the pillow (not shown) that was located at the back of the head M when sleeping is now located at the back, making it impossible to obtain a comfortable sitting position.

If the back plate 1 is further raised, the upper body will be bent forward, giving a feeling of pressure to the abdomen.

In addition, as the backboard 1 stands up, the load of the upper body that the backboard 1 was receiving during sleep will be applied to the lower back and buttocks, and the entire body will be pushed forward.
When the whole body slips at the buttocks and the back plate 1 is tilted again, the upper body is tilted without any influence on the buttocks position, so that the pillow is shifted from the occiput M toward the top of the head.

When using a reclining bed that performs such movements, the bed may be used by a person with a physical disability or other person who is unable to change their posture by themselves, shift the position of their body, or shift the position of the pillow. In such cases, the caregiver must change the position of the patient's body, the position of the pillow, etc. with the help of the caregiver, which is of little use in reducing the caregiver's workload.

The present invention solves the above-mentioned drawbacks by making the floorboard slidable in conjunction with the up-and-down movement of the backboard.
Embodiments will be described in detail below with reference to the accompanying drawings showing examples.

FIG. 3 is a simplified side view showing a bed equipped with the mechanism of the present invention, in which the backboard 1, the floorboard 2, the backboard reclining device, and the floorboard 2 slide in conjunction with the reclining of the backboard. It is composed of an interlocking device.

The back plate 1 is rotatably supported at a predetermined position on the upper end of the support frame 11 about a reclining shaft C.

The floorboard 2 has an end closest to the backboard 1 and an end farthest apart from the support frame 1 via swing rods 6, 6, 9.9, respectively.
It is provided so that it can swing and slide with respect to 1.

Note that F and H are pivots that connect the swinging rods 9 and 6 and the floor plate 2.

The back plate reclining device includes a cylinder device 4 that is swingably provided at a predetermined position on a support frame 11, and a tip end of a piston rod 5 of the cylinder device 4 is integrally attached to an end of the back plate 1 on the side of the floor plate 2. It is connected by a shaft B to an arm rod 7 hanging vertically thereon, and a spring 13 for returning the piston rod is stretched between the shaft B and the swing axis A of the cylinder device 4.

In addition, 14 is a hydraulic pump unit, and a pressure-resistant hose 18
It communicates with the internal chamber of the cylinder device 4 via the supply and discharge ports 15.

The interlocking device is constructed by connecting the axis B of the arm rod 7 and the axis E provided at a predetermined position of the swinging rod 9 with a connecting rod 8, and the swinging rod 9 is It is swingably connected to the support frame 11 about a predetermined position, and the swinging rod 6 is swingably connected to the support frame 11 about an axis G at a predetermined position.

When the cylinder device 4 is not in operation, the axes B and E are located directly below the axes C and D, respectively, and the axis F is located at approximately the same height as the axes.

E is located at the same height as axes C and D, respectively, and axis F is located almost directly above the axis, and axis H is located at approximately the same height in both cases, but the horizontal position is , the position is changed to a position closer to the axis C and a position closer to the axis C.

The footrest 3 is connected to the floor plate 2 through a hinge K, and its central portion is connected to the support frame 11 through a swinging rod 19.
It is connected so that it can swing.

Further, 17 is a protective curtain that covers the gap between the back plate 1 and the floor plate 2.

The operation of the bed having the above configuration is as follows.

When the hydraulic pump unit 14 is operated by operating a hand switch (not shown), hydraulic oil is fed into the cylinder device 4 through the pressure hose 18 and the supply/discharge port 15, and the piston rod 5 is moved by the elastic force of the spring 13. It can be made to protrude against.

That is, as the piston rod 5 protrudes, the cylinder device 4 rotates upward about the axis A, and at the same time, the axis B rotates upward about the axis C.

At this time, the arm rod 7 also rotates upward about the axis C, so that the back plate 1 stands up and raises the upper body of the bed user.

Further, in conjunction with the upward rotation of the shaft B, the shaft E also rotates upward about the axis, and the shaft F also rotates upward about the axis.

That is, at this time, the axis F moves upward and also moves away from the back plate 1, so the floor plate 2 moves in the direction away from the back plate 1 and is lifted from the support frame 11.

However, since the height of the axis H hardly changes, only the horizontal position changes, the floorboard 2 is separated from the backboard 1, and the footrests are tilted so that the board 3 side is higher ( (See dotted line in Figure 3).

Therefore, it is possible to reliably prevent the bed user from slipping, and also to prevent misalignment of the back of the head, pressure on the abdomen, etc.

To explain the action during this time in more detail, during the reclining operation, in the first half, the amount of rise of the axis F is much larger than the amount of horizontal movement, so the floor plate 2 tilts quickly and prevents the bed user from slipping. However, in the second half, the amount of horizontal movement of axis F is much larger than the amount of rise,
The floorboard 2 slides quickly, thereby reliably preventing displacement of the back of the head and pressure on the abdomen.

In addition, the footrest plate 3 slides in the same direction as the floorboard 2 in conjunction with the sliding and tilting of the floorboard 2, and also tilts in the opposite direction to the floorboard 2, so that the part of the foot below the knee is exposed to photons. can be supported.

The above describes the operation when transitioning from a sleeping state to a sitting state. However, when transitioning from a sitting state to a sleeping state, operate the hand switch to open the solenoid valve (not shown) and open the cylinder device. 4 and the hydraulic pump unit 14, each component operates in the opposite direction to the above due to the weight of the bed user and the elasticity of the spring 13, and the back plate 1 and the floor plate 2
And the foot rest can be made flush with the plate 3.

In addition, the bed with the above configuration has a relatively low height as a support frame, so it can be used as is in a Japanese-style room, but it can also be placed on another pedestal or attached to the support frame. By making it taller, it can easily be used as a bed for Western-style rooms.
Moreover, if the hydraulic pump unit is operated by a timer, it can be used as an effective alarm device.

Note that the power source is not limited to an electro-hydraulic cylinder at all, and a combination of a reversible motor and an appropriate power transmission mechanism may be used, and it goes without saying that various other mechanisms may be used.

As described above, the present invention allows the floorboard to slide and tilt in conjunction with the ups and downs of the backboard, so even when the backboard is raised, the body will not slide at all, and the buttocks will not move away from the backboard. Because they are separated, the back of the head comes into contact with a predetermined position on the backboard, producing a unique effect such as being able to reliably prevent the position of a pillow or the like from shifting.

[Brief explanation of the drawing]

Fig. 1 is a simplified diagram showing the sleeping state, Fig. 2 is a simplified diagram showing the sitting state, Fig. 3 is a simplified side view showing the bed equipped with the mechanism of the present invention, and Fig. 4 is a simplified perspective view of the same. figure. 1... Back board, 2... Floor board, 4...
... Cylinder device, 6°9 ... Swinging rod, 7.
...Arm rod, 8...Connection rod, 13...
...Spring.

Claims (1)

[Scope of utility model registration request] In a bed having a reclining mechanism in which the top plate is divided into at least a back plate and a floor plate, and the back plate can be raised and lowered, the floor plate is supported on a support frame by a swinging rod so as to be slidable and tiltable, and the back plate is The reclining mechanism is characterized in that the back plate and the swinging rod are connected by interlocking means that slides the floor plate in a direction away from the back plate when standing up and tilts the floor plate so that the back plate side becomes lower. Bed sore correction mechanism on bed.