Bed body base with auxiliary trundles and operating bed

Abstract

The utility model relates to the field of medical beds, in particular to a bed body base with auxiliary trundles and an operating bed, the bed body base comprises a base body, directional trundles and a plurality of universal trundles supporting the base body, the directional trundles are supported in the middle of the lower end of the base body in a lifting mode through a set of lifting mechanisms, and the universal trundles are arranged on the base body. The lifting mechanism comprises a supporting arm, a hinge pair, a limiting piece, an elastic piece and a driving piece, the supporting arm is hinged to the base body, and a directional trundle is arranged at the free end of the supporting arm; the hinge pair comprises two groups of connecting pieces which are hinged with each other, the first group of connecting pieces are hinged to the base body, and the second group of connecting pieces are hinged to the supporting arm; the limiting piece is arranged on the base body or the supporting arm and used for limiting the rotating included angle between the two sets of connecting pieces. The elastic piece is connected between the supporting arm and the base body so as to drive the directional caster to be lifted to be separated from the ground. The driving piece is used for driving included angles of the two connecting pieces to change; the bed body base and the operating bed are simple in structure and convenient to operate, and production and manufacturing cost can be reduced conveniently.

Description

Technical Field

[0001] This utility model relates to the field of medical bed technology, specifically to a bed base with auxiliary casters and an operating bed. Background Technology

[0002] Currently, the casters on the base of operating tables on the market are mainly configured in two ways: four swivel casters or two swivel casters with two fixed casters. Swivel casters are flexible in steering and convenient to operate in confined spaces, but they are not good at maintaining straight-line driving. Therefore, the two existing configurations each have their advantages and disadvantages.

[0003] Patent application CN112426301A discloses a medical bed frame with directional wheels. The bed base is equipped with four sets of casters, and a set of liftable directional casters is located in the middle of the bed base. During the movement of the bed, the directional casters can contact the ground to maintain the direction of travel, which can solve the above problems well. However, the lifting of the directional casters requires a complex motion mechanism composed of multiple linkages and multiple gas springs for driving. The manufacturing cost is high, and the force-consuming lever between the caster support arm and the motion mechanism results in insufficient load-bearing capacity of the directional casters. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a bed base and operating table with auxiliary casters.

[0005] On one hand, this utility model provides a bed base with auxiliary casters, including a base body, directional casters, and a plurality of omnidirectional casters supporting the base body. The directional casters are vertically and flexibly supported at the lower middle part of the base body by a set of lifting mechanisms, the lifting mechanisms including:

[0006] A support arm, which is hinged to the base body and has the directional caster at its free end;

[0007] The hinged joint includes two sets of connecting members that are hinged to each other. The first set of connecting members is hinged to the base body, and the second set of connecting members is hinged to the support arm.

[0008] A limiting member is provided on the base body or the support arm to limit the rotation angle between the two sets of connecting members;

[0009] An elastic element, connected between the support arm and the base body, drives the directional casters to lift off the ground; and

[0010] The driving component is hinged to the base body and has a connecting part located around its hinged part. The connecting part is hinged to a set of connecting rods, and the other end of the connecting rods is hinged to the hinge pair. When the driving component drives the included angle between the two sets of connecting parts to the maximum, the support arm overcomes the elastic force of the elastic element and causes the directional caster to fall to the ground.

[0011] Furthermore, both sets of the connecting members each have a first end and a second end, the first ends of the two sets of the connecting members are hinged to each other, the base body and the support arm are each hinged to the second end of one set of the connecting members; the first ends of both sets of the connecting members are hinged to the connecting rod.

[0012] Furthermore, both sets of connectors have opposing first and second ends, the first ends of the two sets of connectors are hinged to each other, the base body and the support arm are each hinged to the second end of one set of connectors; the portion between the two ends of any set of connectors or the portion outside the second end of any set of connectors is hinged to the connecting rod.

[0013] Furthermore, a pedal is mounted on the free end of the drive component.

[0014] Furthermore, a shock absorber is also installed between the directional caster and the support arm.

[0015] Furthermore, it also includes a caster mounting plate rotatably mounted on the support arm, the caster mounting plate having a first end and a second end located on both sides of its hinge position, wherein the directional caster is rotatably mounted on the first end of the caster mounting plate, and the shock absorber is a spring and damper connected between the second end of the caster mounting plate and the support arm.

[0016] Furthermore, the base body has a notch for the directional casters to move up and down.

[0017] On the other hand, the present invention also provides an operating table having a bed base as described above.

[0018] The technical solution of this utility model embodiment has at least the following advantages and beneficial effects:

[0019] In the bed base and operating table of this utility model, the movement of the connecting rod driven by the driving component can drive the two sets of connecting parts in the hinge pair to rotate within a certain angle range, thereby driving the swing-type lifting and lowering of the free end of the support arm, thus completing the lifting and lowering of the directional casters. The structure is simple and easy to operate, which helps to reduce production and manufacturing costs. At the same time, under the action of the elastic element and the limiting element, the two sets of connecting parts can maintain the maximum angle state, which plays a supporting role for the support arm and the directional casters, increasing the load-bearing capacity of the directional casters on the middle of the bed. Attached Figure Description

[0020] Figure 1 This is a perspective view of the bed base with auxiliary casters according to the present invention;

[0021] Figure 2 for Figure 1 An enlarged view of part A;

[0022] Figure 3 This is a schematic diagram showing the assembly relationship between the lifting mechanism and the directional caster of this utility model;

[0023] Figure 4 The variations of the bed base of this utility model Figure 1 ;

[0024] Figure 5 The variations of the bed base of this utility model Figure 2 ;

[0025] Reference numerals: 1-base body, 10-notch, 11-support base, 2-directional caster, 20-caster mounting plate, 200-limit pin, 21-shock absorber, 3-swivel caster, 4-lifting mechanism, 40-support arm, 41-hinged joint, 410-connector, 42-limiting component, 43-elastic component, 44-drive component, 440-pedal, 441-connecting part, 45-linkage rod. Detailed Implementation

[0026] This embodiment is Example 1:

[0027] This embodiment provides a bed base with auxiliary casters, which can be used for various medical bed structures such as operating tables or hospital beds.

[0028] Among them, reference Figures 1 to 5 The bed base includes a base body 1, which is supported by several sets of universal casters 3. The number of universal casters 3 is not limited depending on the design of the bed base. In this embodiment, the bed base has four sets of universal casters 3, which are arranged at the four corners of the bed base.

[0029] Reference Figure 1 A set of directional casters 2 is provided in the middle of the bed base 1. The directional casters 2 are raised and lowered under the bed base 1 through a set of lifting mechanism 4. That is, when the directional casters 2 play the role of sliding guide or supporting the bed base 1, the directional casters 2 should be lowered and supported on the ground. Conversely, the directional casters 2 need to be raised and lifted off the ground.

[0030] In this embodiment, a set of notches 10 is provided in the middle of the bed base 1. During the lifting and lowering process of the directional casters 2 via the lifting and lowering mechanism 4, refer to Figure 4 When the directional caster 2 contacts the ground, part of the directional caster 2 is located in the notch 10, as shown in the reference. Figure 5 When the directional caster 2 is lifted off the ground, the directional caster 2 can be completely retracted into the bed base 1 through the notch 10.

[0031] Reference Figure 2 and Figure 3 The lifting mechanism 4 includes a support arm 40, a hinge joint 41, a limiting member 42, an elastic member 43, a connecting rod 44, and a driving member 45.

[0032] The bed base 1 includes a set of support seats 11. One end of the support arm 40 is hinged to the support seat 11, and the other end of the support arm 40 is a free end. The free end of the support arm 40 can swing up and down around its hinge end. The directional caster 2 is installed on the free end of the support arm 40. During the up and down swing of the support arm 40, the directional caster 2 can contact the ground and be lifted upward.

[0033] The hinge pair 41 includes two sets of connectors 410, which are hinged to each other. One set of connectors 410 is also hinged to the support seat 11 inside the base body 1, and the other set of connectors 410 is also hinged to the support arm 40.

[0034] Reference Figure 2 The limiting member 42 can be set on the support seat 11 of the base body 1 or on the support arm 40. In this embodiment, the limiting member 42 is plate-shaped and is set on the support arm 40. Its purpose is to limit the rotation angle between the two sets of connecting members 410. That is, when the angle between the two sets of connecting members 410 rotates to the maximum angle, the connecting member 410 is blocked by the limiting member 42 and cannot continue to rotate and expand the angle. In this embodiment, the maximum angle between the two sets of connecting members 410 is about 180°.

[0035] In addition, the elastic element 43 is connected between the support arm 40 and the base body 1 to drive the directional caster 2 to lift off the ground. The elastic element 43 can be a spring or sheet structure with elasticity. In this embodiment, the elastic element 43 is a tension spring connected between the support arm 40 and the base body 1. Under the action of the elastic element 43, the free end of the support arm 40 can be pulled up, so that the directional caster 2 is lifted off the ground.

[0036] Reference Figures 3 to 5 The driving member 44 is hinged to another set of support seats 11 inside the base body 1. The driving member 44 is provided with a connecting part 441 located on the periphery of its own hinge part. A set of connecting rods 45 are hinged to the connecting part 441, and the other end of the connecting rods 45 is hinged to the hinge pair 41. Therefore, by rotating the driving member 44, the connecting rods 45 can be driven to move between the hinge pair 41 and the driving member 44.

[0037] In this embodiment, a pedal 440 is provided at the free end of the drive member 44, as shown in the reference. Figure 4 When the pedal 440 is raised, causing the drive member 44 to move to the right via the connecting rod 45, the hinged portion between the two sets of connecting members 410 moves to the right, maximizing the angle between the two sets of connecting members 410. At this point, the angle between the two sets of connecting members 410 is almost a flat angle, further widening the angle between the support arm 40 and the bottom of the base body 1. Therefore, the free end of the support arm 40 descends, causing the directional caster 2 to contact the ground. (Refer to...) Figure 5 When the pedal 440 is pressed down, the connecting rod 45 moves to the left, pushing the hinge between the two sets of connecting parts 410 to move to the left, making the included angle between the two sets of connecting parts 410 smaller; at the same time, under the action of the elastic element 43, the directional caster 2 is lifted up and lifted off the ground.

[0038] Reference Figure 4 In one embodiment, the hinge position of the elastic member 43 and the support arm 40 is closer to the free end of the support arm 40 than the hinge position of the connector 410 and the support arm 40. The function of the limiting member 42 is to prevent the hinge pair from continuing to rotate counterclockwise at the maximum angle. Therefore, when the driving member 44 drives the two sets of connectors 410 to rotate to the maximum angle, the tension of the elastic member 43 also helps the two sets of connectors 410 maintain the maximum angle. Therefore, at this time, the directional caster 2 can be supported more stably on the ground, which can improve the load-bearing capacity of the directional caster 2.

[0039] The hinge connection between link 45 and connector 410 can include the following forms:

[0040] In one embodiment, two sets of connectors 410 are defined to each have a first end and a second end. The first ends of the two sets of connectors 410 are hinged to each other. The base body 1 and the support arm 40 are each hinged to the second end of a set of connectors 410. Then the first ends of the two sets of connectors 410 are both hinged to the connecting rod 45, that is, the hinge axis of the two sets of connectors 410 is collinear with the hinge axis of the connecting rod 45.

[0041] In one embodiment, each of the connectors 410 is defined to have a first end and a second end. The first ends of the two sets of connectors 410 are hinged to each other. The base body 1 and the support arm 40 are each hinged to the second end of a set of connectors 410. Then, the connecting rod 45 can be hinged to the part between the two ends of any set of connectors 410, without having to be hinged to both sets of connectors 410 at the same time. In this case, the hinge part of the connecting rod 45 and the connector 410 can be as close as possible to the first end of the connector 410 to achieve the effect of saving effort.

[0042] Alternatively, in one embodiment, each of the connectors 410 is defined to have a first end and a second end, with the first ends of the two sets of connectors 410 hinged to each other, and the base body 1 and the support arm 40 each hinged to the second end of a set of connectors 410. Then, the outer side of the second end of any set of connectors 410 has an extension portion, and the connecting rod 45 can be hinged to the extension portion of the connector 410, which can also drive the included angle between the two sets of connectors 410 to change.

[0043] Alternatively, a shock absorber 21 can be installed between the directional caster 2 and the support arm 40 to achieve the effect of shock absorption and smooth operation of the directional caster 2. The shock absorber is existing technology and will not be described in detail here.

[0044] In one embodiment, reference is made to Figure 5 The free end of the support arm 40 is also hinged to a set of caster mounting plates 20. The caster mounting plates 20 have a first end and a second end located on both sides of their hinged position. The directional caster 2 is rotatably mounted on the first end of the caster mounting plate 20. The shock absorber 21 is a spring and damper connected between the second end of the caster mounting plate 20 and the support arm 40. At this time, the support arm 40 is also provided with a limiting pin 200 located above the second end of the caster mounting plate 20.

[0045] Example 2:

[0046] This embodiment also provides an operating bed, which has the bed base as described in Embodiment 1.

[0047] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A bed base with auxiliary casters, comprising a base body, directional casters, and a plurality of omnidirectional casters supporting the base body, wherein the directional casters are vertically and flexibly supported at the lower center of the base body via a set of lifting mechanisms, characterized in that, The lifting mechanism includes: A support arm, which is hinged to the base body and has the directional caster at its free end; The hinged joint includes two sets of connecting members that are hinged to each other. The first set of connecting members is hinged to the base body, and the second set of connecting members is hinged to the support arm. A limiting member is provided on the base body or the support arm to limit the rotation angle between the two sets of connecting members; An elastic element, connected between the support arm and the base body, drives the directional casters to lift off the ground; and The driving component is hinged to the base body and has a connecting part located around its hinged part. The connecting part is hinged to a set of connecting rods, and the other end of the connecting rods is hinged to the hinge pair. When the driving component drives the included angle between the two sets of connecting parts to the maximum, the support arm overcomes the elastic force of the elastic element and causes the directional caster to fall to the ground.

2. The bed base with auxiliary casters according to claim 1, characterized in that, Both sets of connectors have opposite first and second ends. The first ends of the two sets of connectors are hinged to each other. The base body and the support arm are each hinged to the second end of one set of connectors. The first ends of both sets of connectors are hinged to the connecting rod.

3. The bed base with auxiliary casters according to claim 1, characterized in that, Both sets of connectors have opposite first and second ends. The first ends of the two sets of connectors are hinged to each other. The base body and the support arm are each hinged to the second end of one set of connectors. The portion between the two ends of any set of connectors or the portion outside the second end of any set of connectors is hinged to the connecting rod.

4. The bed base with auxiliary casters according to claim 2 or 3, characterized in that, A pedal is mounted on the free end of the drive component.

5. The bed base with auxiliary casters according to claim 2 or 3, characterized in that, A shock absorber is also installed between the directional caster and the support arm.

6. The bed base with auxiliary casters according to claim 5, characterized in that, It also includes a caster mounting plate rotatably mounted on the support arm, the caster mounting plate having a first end and a second end located on both sides of its hinge position, wherein the directional caster is rotatably mounted on the first end of the caster mounting plate, and the shock absorber is a spring and damper connected between the second end of the caster mounting plate and the support arm.

7. The bed base with auxiliary casters according to claim 1, characterized in that, The base body has a notch for the directional casters to move up and down.

8. An operating table, characterized in that, The operating table has a bed base with auxiliary casters as described in any one of claims 1 to 7.

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