CN212788945U

CN212788945U - Waist bridge assembly of medical bed and medical bed

Info

Publication number: CN212788945U
Application number: CN202020784398.3U
Authority: CN
Inventors: 张宏兵
Original assignee: Nanjing Mindray Bio Medical Electronics Co Ltd
Current assignee: Nanjing Mindray Bio Medical Electronics Co Ltd
Priority date: 2020-05-13
Filing date: 2020-05-13
Publication date: 2021-03-26
Anticipated expiration: 2030-05-13

Abstract

The embodiment of the application provides a waist bridge subassembly of medical bed, includes: the waist bridge plate and the two waist bridge seats are arranged at intervals; the waist bridge seat comprises a seat body, a push rod part arranged on the seat body and a rotary connecting piece arranged at one end of the push rod part; the rotary connecting piece is connected with the waist bridge plate so as to drive the waist bridge plate to rotate relative to the seat body; the pivotal connection has an offset gap in a direction parallel to a center line of rotation of the lumbar bridge plate. The embodiment of the application also provides a medical bed. The waist bridge assembly of the medical bed and the medical bed provided by the embodiment of the application can enable an operator to save more labor in the process of controlling the waist bridge plate to lift by rotating the handle.

Description

Waist bridge assembly of medical bed and medical bed

Technical Field

The application relates to the technical field of medical equipment, in particular to a waist bridge assembly of a medical bed and the medical bed.

Background

Waist bridge subassembly is the device that is used for raising patient's waist that sets up on medical bed, and among the correlation technique, there is a waist bridge subassembly to fix the waist bridge board in the one end of push rod portion, and the operator controls push rod portion through rotating the handle and goes up and down to finally realize the lift of waist bridge board.

However, with this kind of lumbar bridge assembly, the torque required by the operator during the turning of the handle is large, and therefore the operator feels a lot of effort during the operation.

SUMMERY OF THE UTILITY MODEL

In view of this, the present application provides a lumbar bridge assembly of a medical bed and a medical bed, so as to solve the technical problem that an operator is relatively hard to control the lifting of a lumbar bridge plate in the process of rotating a handle in the related art.

To achieve the above object, an aspect of the embodiments of the present application provides a lumbar bridge assembly of a medical bed, including:

a lumbar bridge plate;

the waist bridge comprises two waist bridge seats arranged at intervals, wherein each waist bridge seat comprises a seat body, a push rod part arranged on the seat body and a rotating connecting piece arranged at one end of the push rod part; the rotary connecting piece is connected with the waist bridge plate so as to drive the waist bridge plate to rotate relative to the seat body; the pivotal connection has an offset gap in a direction parallel to a center line of rotation of the lumbar bridge plate.

Another aspect of the embodiments of the present application further provides a medical bed, the medical bed includes a bed body and the above waist bridge assembly, the waist bridge assembly is disposed on the bed body.

The utility model provides a waist bridge subassembly and medical bed of medical bed, through set up between push rod portion and waist bridge board and can drive waist bridge board for pedestal pivoted rotation connecting piece, and along the direction that is on a parallel with the rotation center line of waist bridge board, rotation connecting piece has the skew clearance, can make waist bridge board enough rotate for the pedestal, also can follow the direction skew that is on a parallel with the rotation center line of waist bridge board, thereby can make the operator can be more laborsaving in the process of rotating handle control waist bridge board lift.

Drawings

Fig. 1 is a schematic structural diagram of a medical bed according to an embodiment of the present application;

FIG. 2 is a schematic structural view of the lumbar bridge assembly shown in FIG. 1;

FIG. 3 is an exploded view of the waist bridge assembly shown in FIG. 2;

FIG. 4 is an exploded view of the lumbar bridge mount shown in FIG. 2;

FIG. 5 is a schematic view of the mating relationship of the push rod portion and the rotatable connection member shown in FIG. 2;

FIG. 6 is a cross-sectional view E-E of FIG. 5;

FIG. 7 is a schematic illustration of a portion of a second lumbar bridge assembly according to another embodiment of the present application;

figure 8 is a schematic view of a portion of a third lumbar bridge assembly according to yet another embodiment of the present application.

Description of the reference numerals

A lumbar bridge assembly 100; a lumbar bridge plate 110; a lumbar bridge mount 120; a base body 121; a push rod part 122; a push rod 1221; the connecting member 123 is rotated; mounting grooves 123 a; a mount 1231; an attachment plate 12311; a first ear panel 12312; a second ear panel 1232; a ball stem 1233; a stem portion 12331; a ball head 12332; a support base 1234; a rotating shaft 124; a drive section 125; a first bevel gear 1251; a second bevel gear 1252; a first straight gear 1253; a second spur gear 1254; a gear shaft 1255; an input shaft 126; a transmission rod 127; a set screw 128; a connecting shaft 130; a flexible coupling 140; a bed 200.

Detailed Description

It should be noted that, in the present application, technical features in examples and embodiments may be combined with each other without conflict, and the detailed description in the specific embodiment should be understood as an explanation of the gist of the present application and should not be construed as an improper limitation to the present application.

In the description of the present application, "upper" and "lower" are based on the orientation or positional relationship shown in fig. 2, it is to be understood that these orientation terms are merely for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present application.

Referring to fig. 1 to 6, the lumbar bridge assembly 100 includes: a lumbar bridge plate 110 and a lumbar bridge mount 120. The number of the waist bridge seats 120 is two, and the two waist bridge seats 120 are arranged at intervals. The waist bridge seat 120 includes a seat body 121, a push rod part 122 disposed on the seat body 121, and a rotary connecting member 123 disposed at one end of the push rod part 122. The rotation connecting member 123 is connected to the waist bridge plate 110 to rotate the waist bridge plate 110 relative to the seat body 121 (the double arrow at B in fig. 2 indicates the rotation direction). The rotation link 123 has an offset gap L2 (see fig. 5) in a direction parallel to the rotation center line a of the waist bridge panel 110, that is, at least a part of the structure of the rotation link 123 can be offset in a direction parallel to the rotation center line a of the waist bridge panel 110, thereby driving the waist bridge panel 110 to be offset in a direction parallel to the rotation center line a of the waist bridge panel 110 (the double arrow at C in fig. 2 indicates the offset direction).

Specifically, among the relevant art, waist bridge plate is with push rod portion fixed connection, that is to say, has formed a statically indeterminate beam structure with fixed restraint between waist bridge plate and the waist bridge seat, and supposing that the load that the patient applyed on waist bridge plate is the equipartition load, according to mechanics principle can know, satisfies following formula between moment of flexure and the equipartition load: q ═ ql²And/2, wherein M represents bending moment, q represents uniform load, and l represents length of the uniform load. Meanwhile, a certain positive correlation exists between the bending moment and the torque required by the operator to rotate the handle, so that the torque required by the operator to rotate the handle is larger due to the bending moment, the operator feels more labored in the operation process, especially when the weight of a patient is heavier, the uniform load applied on the waist bridge plate by the patient is correspondingly increased, the bending moment is increased along with the uniform load, the torque required by the operator to rotate the handle is correspondingly increased, and the operator feels more labored.

In the lumbar bridge assembly 100 of the present embodiment, a rotating connection member 123 is disposed between the push rod portion 122 and the lumbar bridge plate 110, and through the cooperation of the rotating connection member 123, the lumbar bridge plate 110 can not only rotate around the rotation center line a, but also can shift relative to the seat body 121 along a direction parallel to the rotation center line a, which is equivalent to a hinge structure formed between the lumbar bridge plate 110 and the lumbar bridge seat 120, and for the hinge structure, the bending moment at the hinge point is 0, i.e. the two lumbar bridge seats 120 are not subjected to the bending moment when bearing, so that the torque is not affected by the bending moment when the operator rotates the handle, and further, the operator saves more labor in the process of rotating the handle.

In addition, with the lumbar bridge assembly 100 of the present embodiment, when the lumbar bridge plate 110 supports the waist of the patient, the lumbar bridge plate 110 can adapt to the waist of the patient in a rotating and/or translational manner, thereby also enabling the patient to feel more comfortable.

Referring to fig. 2 to 5, the rotating connecting member 123 of the present embodiment is an installation block. The mounting block is rotatably connected to one end of the push rod portion 122, the rotational connection forms the rotational center line a, and an offset gap L2 is provided between the mounting block and the push rod portion 122. Since the mounting block is rotatable about the rotation center line a and has an offset gap L2 with the push rod portion 122, the lumbar bridge plate 110 can also be rotated and offset together with the mounting block after the lumbar bridge plate 110 is connected to the mounting block.

Further, referring to fig. 4 to 6, the waist bridge base 120 of the present embodiment further includes a rotating shaft 124, and the mounting block has a mounting groove 123 a. The rotating shaft 124 passes through the mounting groove 123a and is fixedly connected with the mounting block. One end of the push rod 122 extends into the mounting groove 123a and is rotatably connected to the rotating shaft 124. The push rod portion 122 has an offset gap L2 with the side wall of the mounting groove 123a in the axial direction of the rotation shaft 124. A rotating gap L1 is formed between the side wall of the mounting groove located at both sides of the rotating shaft 124 and the push rod portion 122 (see fig. 5). That is, the axis of the rotating shaft 124 is the rotation center line a of the lumbar bridge plate 110.

Specifically, the mounting block of the present embodiment is fixedly connected to the rotating shaft 124 through two limit screws 128 to prevent the rotating shaft 124 from falling off, and in other embodiments, the rotating shaft 124 may also be fixedly connected to the mounting block through an axial retaining ring.

The mounting groove 123a can limit the rotation and translation of the mounting block to prevent the too large amplitude of the rotation or translation of the mounting block.

For example, in other embodiments, the rotating shaft 124 may be inserted through one end of the push rod portion 122 and fixedly connected to the push rod portion 122, the mounting block may be rotatably connected to the rotating shaft 124, and the rotating shaft 124 may have a sufficient length, so that the mounting block can slide along the axial direction of the rotating shaft 124, and thus the offset gap L2 may be formed between the mounting block and the push rod portion 122.

For example, referring to fig. 7, in another embodiment, the rotating link 123 includes a mounting seat 1231 and a second ear plate 1232, in this embodiment, the second ear plate 1232 is disposed at one end of the push rod portion 122, and the mounting seat 1231 is connected to the lumbar bridge plate 110, and in other embodiments, the mounting seat 1231 is disposed at one end of the push rod portion 122, and the second ear plate 1232 is connected to the lumbar bridge plate 110. The mounting seat 1231 includes a connecting plate 12311 and two first ear plates 12312 spaced apart from each other on one side of the connecting plate 12311, and the second ear plate 1232 extends into the space between the two first ear plates 12312 and is rotatably connected to the two first ear plates 12312, and the rotation center line a is formed at the rotation connection. The second ear panel 1232 has an offset gap L2 with the two first ear panels 12312.

Referring to fig. 8, in another embodiment, the rotational connection member 123 is a ball joint, the ball joint includes a ball rod 1233 and a bearing 1234 having a ball socket, and the ball rod 1233 includes a rod 12331 and a ball head 12332 disposed at one end of the rod 12331. The bearing 1234 is disposed at one end of the push rod portion 122, and the ball 12332 of the ball bar 1233 is disposed in and rotatable within a socket. The rod 12331 of the ball-end lever 1233 is hinged to the lumbar bridge plate 110, and the rod 12331 and the supporting seat 1234 have an offset gap L2 therebetween, that is, the supporting seat 1234 can act as a limit for the rod 12331 to limit the offset of the rod 12331 along a direction parallel to the rotation center line a of the lumbar bridge plate 110.

It should be noted that the mounting block has only one center of rotation after it is pivotally connected to the push rod portion 122, and similarly, the mounting seat 1231 and the second ear plate 1232 have only one center of rotation after the second ear plate 1232 is pivotally connected to the two first ear plates 12312. However, in the case of the ball joint, when it is not hinged to the lumbar bridge plate 110, the ball head 12332 of the ball head bar 1233 can rotate in the ball socket at multiple angles, that is, the ball joint can rotate around multiple rotation center lines, but after the ball joints of the two lumbar bridge seats 120 are hinged to the lumbar bridge plate 110, the lumbar bridge plate 110 can only rotate around only one rotation center line a. Meanwhile, the rod portions 12331 of the two ball rods 1233 are hinged to the lumbar bridge plate 110, so that a link structure is formed among the two supporting seats 1234, the two ball rods 1233 and the lumbar bridge plate 110, and thus the lumbar bridge plate 110 can be offset relative to the seat body 121 along a direction parallel to the rotation center line a. In addition, for the ball joint, since the ball head rod 1233 rotationally drives the waist bridge plate 110 to shift, the waist bridge plate 110 is not actually shifted with respect to the seat body 121 in a direction parallel to the rotation center line a, and the shift of the waist bridge plate 110 can be decomposed into a moving direction parallel to the rotation center line a and a moving direction perpendicular to the rotation center line a, but since the shift gap L2 between the rod part 12331 and the supporting seat 1234 is small, that is, the shift of the waist bridge plate 110 is not large, the shift of the waist bridge plate 110 can be regarded as a linear movement parallel to the rotation center line a.

Referring to fig. 2 to 4, the waist bridge seat 120 of the present embodiment further includes a driving portion 125, an input shaft 126 connected to the driving portion 125, and a transmission rod 127 rotatably connected to the seat body 121, and the waist bridge assembly 100 further includes a connecting shaft 130 and a handle (not shown). The push rod portion 122 is threadedly received in the drive rod 127. The drive part 125 is drivingly connected to the transmission rod 127. The connecting shaft 130 connects the input shafts 126 on the two lumbar bridge mounts 120. The handle is connected to an input shaft 126 on the lumbar support 120. The handle rotates relative to the seat body 121 under the action of external force, so that the push rod parts 122 on the two waist bridge seats 120 move up and down synchronously relative to the seat body 121 along the axial direction.

Specifically, referring to fig. 4 to 6, the push rod portion 122 of the present embodiment includes two push rods 1221 that are sleeved with each other in a threaded manner, of the two push rods 1221 that are sleeved with each other in a threaded manner, the push rod 1221 located at the outermost side is sleeved with the transmission rod 127 in a threaded manner, and one end of the push rod 1221 located at the innermost side extends into the installation groove 123a to be rotatably connected with the rotating shaft 124. The driving part 125 of the present embodiment includes a first bevel gear 1251, a second bevel gear 1252, a first straight gear 1253, a second straight gear 1254, and a gear shaft 1255. The input shaft 126 is rotatably connected with the base body 121, and the axis of the input shaft 126 is horizontally arranged. The first bevel gear 1251 is journaled on the input shaft 126. The gear shaft 1255 is rotatably connected to the base body 121, and the axis of the gear shaft 1255 is perpendicular to the axis of the input shaft 126. The second bevel gear 1252 is sleeved on the gear shaft 1255 and meshed with the first bevel gear 1251. The first straight gear 1253 is sleeved on the gear shaft 1255, and the second straight gear 1254 is sleeved on the transmission rod 127 and meshed with the first straight gear 1253. That is, the driving portion 125 of the present embodiment uses a gear assembly for driving, and the gear assembly not only has a good driving effect, but also has a relatively compact structure, so that the overall structure of the waist bridge assembly 100 can be made more compact.

It is understood that the number of the push rods 1221 screwed to each other is not limited to two, and in other embodiments, the number of the push rods 1221 may be greater than two, as long as it is ensured that the push rod 1221 located at the outermost side is screwed to the transmission rod 127 in all the push rods 1221 screwed to each other. In other embodiments, the rod portion 122 may have only one rod 1221, and the rod 1221 is directly threadedly engaged with the transmission rod 127. In other embodiments, worm gears and worms may be used in place of the gear assemblies.

Further, referring to fig. 2 and 3, the lumbar bridge assembly 100 of the present embodiment further includes a flexible coupling 140, and the input shaft 126 of the lumbar bridge mount 120 is connected to the connecting shaft 130 through the flexible coupling 140. By providing the flexible coupling 140, the dimensional tolerance and/or assembly error of the two waist bridge seats 120 in the axial direction and the radial direction of the input shaft 126 can be compensated, so that the torque can be transmitted with high efficiency, and the transmission efficiency can be improved. It is understood that in other embodiments, the flexible coupling 140 may not be provided.

Further, the waist bridge base 120 of the present embodiment further includes a bearing (not shown), and the transmission rod 127 is rotatably connected to the base body 121 through the bearing. The bearing can be a rolling bearing or a sliding bearing, and the friction resistance between the transmission rod 127 and the seat body 121 can be reduced by the bearing, so that an operator can save more labor when rotating the handle.

Referring to fig. 1, another embodiment of the present application further provides a medical bed, which includes a bed body 200 and the lumbar bridge assembly 100 provided in the above embodiment, wherein the lumbar bridge assembly 100 is disposed on the bed body 200.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A lumbar bridge assembly for a medical bed, comprising:

a lumbar bridge plate;

2. The lumbar bridge assembly of claim 1, wherein said rotational connection is a mounting block;

the mounting block is rotatably connected with one end of the push rod part, and the offset gap is formed between the mounting block and the push rod part.

3. The lumbar bridge assembly of claim 2, wherein said lumbar bridge mount further comprises a pivot shaft, said mounting block having a mounting slot;

the rotating shaft penetrates through the mounting groove and is fixedly connected with the mounting block;

one end of the push rod part extends into the mounting groove and is rotatably connected with the rotating shaft;

the offset gap is formed between the push rod part and the side wall of the mounting groove along the axial direction of the rotating shaft; and a rotating gap is formed between the side wall of the mounting groove positioned at two sides of the rotating shaft and the push rod part.

4. The lumbar bridge assembly of claim 1, wherein said rotational connection includes a mounting block and a second ear plate, one of said mounting block and said second ear plate being disposed at one end of said push rod portion, the other of said mounting block and said second ear plate being connected to said lumbar bridge plate;

the mounting seat comprises a connecting plate and two first lug plates arranged on one side of the connecting plate at intervals, and the second lug plate extends into the interval between the two first lug plates and is rotatably connected with the two first lug plates;

the offset gap is between the second ear plate and both of the first ear plates.

5. The lumbar bridge assembly according to claim 1, wherein said rotational connection is a ball joint including a ball bar and a bearing seat having a socket, said ball bar including a rod portion and a ball head disposed at one end of said rod portion;

the supporting seat is arranged at one end of the push rod part,

the ball head of the ball head rod is arranged in the ball socket and can rotate in the ball socket;

the rod part of the ball head rod is hinged with the waist bridge plate, and the offset gap is formed between the rod part and the supporting seat.

6. The lumbar bridge assembly according to any one of claims 1-5, wherein said lumbar bridge seat further comprises a driving portion, an input shaft connected to said driving portion, and a transmission rod rotatably connected to said seat body, said lumbar bridge assembly further comprising a connecting shaft and a handle;

the push rod part is in threaded sleeve joint with the transmission rod;

the driving part is in driving connection with the transmission rod;

the connecting shaft is connected with the input shafts on the two waist bridge seats;

the handle is connected with the input shaft on one waist bridge seat;

the handle rotates relative to the seat body under the action of external force, so that the push rod parts on the two waist bridge seats move up and down along the axial direction synchronously relative to the seat body.

7. The lumbar bridge assembly according to claim 6, wherein said push rod portion includes at least two push rods threadedly engaged with each other, and of all of said push rods threadedly engaged with each other, said push rod positioned outermost is threadedly engaged with said drive link.

8. The lumbar axle assembly of claim 7 wherein said drive section includes a first bevel gear, a second bevel gear, a first spur gear, a second spur gear, and a gear shaft;

the input shaft is rotatably connected with the seat body, and the axis of the input shaft is horizontally arranged; the first bevel gear is sleeved on the input shaft;

the gear shaft is rotatably connected with the base body, and the axis of the gear shaft is vertical to the axis of the input shaft; the second bevel gear is sleeved on the gear shaft and meshed with the first bevel gear;

the first straight gear is sleeved on the gear shaft, and the second straight gear is sleeved on the transmission rod and meshed with the first straight gear.

9. The lumbar bridge assembly of claim 7, wherein said lumbar bridge mount further comprises a bearing through which said drive link is rotatably coupled to said mount.

10. The lumbar bridge assembly of claim 6, further comprising a flexible coupling, said input shaft on one of said lumbar mounts being connected to said connecting shaft by said flexible coupling.

11. A medical bed, comprising a bed and the lumbar bridge assembly of any of claims 1-10, wherein the lumbar bridge assembly is disposed on the bed.