KR200311336Y1 - Universal joint of medical bed - Google Patents

Abstract

The present invention allows the universal joint of the crank type handle and the lead screw to be used to adjust the backrest and the footrest of the medical bed at a predetermined angle so that the one-touch assembly of the double screw is made of synthetic resin material. The aim is to provide a universal joint for medical beds that accommodates warping at various angles while minimizing smooth operation and friction noise when the universal joint angularly moves.

In other words, the present invention constitutes a universal joint (1) of the medical bed that can be connected to the axis of the lead screw (2) and the crank-type handle (3) for the angle adjustment of the back plate and the footrest of various medical beds, , The joint member 4 of the synthetic resin material which is respectively fixed to the lead screw 2 and the crank-type handle 3 side, and the connecting member 5 of the synthetic resin material which is formed in a substantially crisscross shape by connecting the joint member 4 to each other. The joint member 4 is formed in the upper and lower support pieces 7 of the U-shape at the tip of the fixed tube portion 6, and has a coupling hole 11 on the outside of the support piece 7 Ring-shaped fixing piece (9) is formed integrally with the elastic piece (8), and the connecting member (5) is formed with pins (10) in the crosswise direction, respectively, in the arcuate shape on the joint member (4) and the corresponding surface. As the banded rectangular buffer piece 12 is formed integrally with the elastic piece 13, the present invention The universal joint (1) of the medical bed to be connected to the shaft from various angles, but consists of a joint member (4) and a connecting member (5) that is injection molded from a synthetic resin material, can be assembled and separated by mutual force It is possible to produce mass-products and cheap production of products, to provide smooth operation even when warping due to the angle change, and to provide a number of effects, such as minimizing operating noise.

Description

Universal joint of medical bed

The present invention relates to a universal joint (medical joint) of the medical bed, and more particularly to the universal joint of the medical bed connecting the crank-type handle and the lead screw used to adjust the backrest and the footrest of the medical bed at a predetermined angle. It is a new type of medical material that enables one-touch assembly with double structured synthetic resin material and accommodates twisting phenomenon of various angles of lead screw while minimizing smooth operation and friction noise when universal joint is angular movement. We want to provide a universal joint for the bed.

In general, the medical bed is to be able to adjust the back and the footrest to the desired angle for the convenience of the patient's bed life,

Such a medical bed uses the crank-type handle attached to the bed body to adjust the angle of the back plate and the footrest, and the position of the crank shaft connected to the back plate is changed in all directions with the lead screw while the back plate is angle-adjusted. do.

At this time, the position of the lead screw and the like of the changed back plate and the position of the crankshaft connected to the bed body do not coincide with each other, which causes a lot of trouble to the rotation of the lead screw, leading to breakage of the lead screw.

The lead screw connected to the back of the existing medical bed and the crankshaft connected to the bed body is connected using a general pin and a bow pin (see Fig. 1).

In order to absorb the clearance between the lead screw and the crankshaft generated when the lead screw rotates, the connection part of the lead screw and the crankshaft must operate very smoothly. It was assembled using, it did not make smooth 360 ° rotation.

In addition, the connection part with the lead screw is also connected with a pin, so the pin screw is pulled out during rotation control and the lead screw is damaged in many cases.

The present invention is to provide a universal joint of the medical bed of a novel configuration that can solve the problems of the existing pin bed of the medical bed as described above,

The present invention constitutes a universal joint with a double structure so that shaft connection can be made at various angles, but it is possible to assemble and separate the joint member formed of synthetic resin material by mutual force fitting method to maximize productivity and convenience of assembly. In order to provide a universal joint of the medical bed that can minimize the smoothness of operation and friction noise while accommodating the twisting phenomenon of the lead screw, the present invention has been completed.

Figure 1 shows the lead screw and the crank handle connection means of the conventional medical bed

Perspective view

2 is a perspective view of the coupling state of the present invention

3 is an exploded perspective view showing a preferred embodiment of the present invention

4 is an enlarged cross-sectional configuration of main parts of the present invention

Figure 5 is a schematic side view illustrating the use state of the present invention

■ Explanation of symbols used in main part of drawing ■

1: Universal joint of medical bed 2: Lead screw

3: crank handle 4: joint member

5: connecting member 6: fixed tube

7: support piece 8: elastic piece

9: fixed piece 10: pin

11: coupling hole 12: cushioning piece

13: elastic piece

Figure 2 is a perspective view showing a universal joint (1) of the medical bed of the present invention, Figure 3 is an exploded perspective view thereof, Figure 4 is a cross-sectional view of the main portion of the present invention, Figure 5 is a schematic view showing a state of use of the present invention As a phosphorus side view etc., this invention is demonstrated in detail with these drawings as follows.

Universal joint (1) of the medical bed provided in the present invention is a joint member (4) of the same configuration and fixed to the lead screw (2) and the crank-type handle (3), respectively, interconnecting the joint member (4) It consists of a connecting member 5 of the approximately ten cross shape.

That is, the joint member 4 may be injection molded with a synthetic resin material, which may be integrally molded or fixed by an insert molding method on the lead screw 2 and the crank-type handle 3, respectively, or fixed by a separate setting bolt. An approximately U-shaped support piece 7 is formed up and down at the tip of the fixed tube portion 6, and a ring-shaped fixing piece 9 connected to the elastic piece 8 is integrated outside the support piece 7. Form.

The ring-shaped fixing piece 9 is formed with coupling holes 11 into which the pin 10 of the connecting member 5 can be fitted.

The joint members 4 are connected to each other at an angle of 180 ° to each other. For this purpose, the pins 10 are formed in the crisscross direction (four directions), respectively, and the joint members 4 are formed. On the surface corresponding to and is formed integrally with the elastic piece 13, the rectangular buffer piece 12 bent in a rough arc.

When the pin 10 formed in all directions on the connecting member 5 is assembled to the coupling hole 11 of the joint member 4, the force acting in the coupling direction of the pin 10 is supported by the support piece 7. The force is not applied to the actual fixing piece 9, the fixing piece 9 only serves to hold the pin 10 with the joint member 4 (see FIG. 4).

In the drawings, reference numeral 14 denotes a bed and 15 denotes a back plate.

Universal joint (1) of the medical bed of the present invention can be configured as described above is a crank-type handle (3) and lead screw (2) used to adjust the back plate or the footrest of the bed at a desired angle in a horizontal state ) Is used as a connecting means for connecting the shafts at various angles, and will be described in more detail below for the unique effects of the present invention.

As shown in Figure 5, the lead screw (2) by connecting the universal joint (1) of the subject innovation between the lead screw (2) and the crank-type handle (3) upper rotational adjustment of the crank-type handle (3) The back plate 15 or the foot plate which is connected to the end of the angle controllable angle can be adjusted at a desired angle. Here, the universal joint 1 of the present invention is inexpensive because it is manufactured by an injection molding method using synthetic resin material. It is possible to mass-produce, and when you want to interconnect the lead screw (2) and the crank-type handle (3) site is given the advantage that the operator can simply assemble without a separate assembly tool.

That is, the joint member 4 constituting the universal joint (1) of the present invention is fixed to the lead screw (2) side and the crank-type handle (3), respectively, and then connecting the cross-shaped connecting member (5) In this connection assembly of the connecting member 5, the pin 10 formed in four directions is forcedly fitted into the coupling hole 11 of the joint member 4, thereby completing the assembly.

When connecting the pin 10 to the joint member 4, first, the part of the pin 10 is inserted into the roughly U-shaped support piece 7 so that the fixing piece 9 is spread outward by the operator. (9) is connected to the support piece (7) and the elastic piece (8) is easily opened to the outside, when the pin (10) enters the corresponding position of the coupling hole 11, the hand from the holding piece (9) was held When it is separated, the pin 10 is fixed to the fixing piece 9 while the fixing piece 9 is returned to its original position by the elasticity of the elastic piece 8.

When the connecting member 5 is connected to the joint member 4 as described above, the lead screw 2 and the crank-type handle 3 are maintained in the axial connection state even when twisting due to various angle changes, and the operation is very smooth. When the angle is converted, a rectangular cushioning piece 12 bent in an arc shape corresponds to the joint surface of the joint member 4 and the connecting member 5, and the shock absorbing and noise generation together with the elastic piece 13 are performed. It can be minimized.

As described in detail above, the universal joint (1) of the medical bed provided in the present invention comprises a universal joint (1) of the medical bed, which can be axially connected at various angles, in a double structure, which is injected into a synthetic resin material. Consisting of the joint member (4) and the connecting member (5) to be molded, it is possible to assemble and separate by the mutual force fitting method, it is possible to mass-produce and cheap production of the product, it is smooth operation even in the distortion according to the angle change The expected effect is unexpectedly great as it can minimize operating noise.

Claims (1)

In the construction of the universal joint (1) of the medical bed that can be axially connected to the lead screw (2) and the crank-type handle (3) for angle adjustment of the back plate and the footrest of various medical beds; Universal joint (1) of the medical bed is a joint member (4) of synthetic resin material which is respectively fixed to the side of the lead screw (2) and the crank-type handle (3), The joint member 4 is made of a connecting member 5 of a synthetic resin material which is interconnected and formed in a roughly ten cross shape, The joint member 4 has a U-shaped support piece 7 having a roughly U shape at the distal end of the fixed pipe part 6, and a ring-shaped fixing piece having a coupling hole 11 on the outer side of the support piece 7. (9) integrally formed with an elastic piece (8), Fins 10 are formed on the connecting member 5 in the crosswise direction, respectively, and the elastic member 13 is integrally formed with the rectangular cushioning piece 12 which is bent in an arc shape on the joint member 4 and the corresponding surface. Universal joint of the medical bed characterized in that one.