Lifting column of medical device and medical device

Abstract

The medical device comprises a medical apparatus and a base. The lifting column of the medical device comprises an outer sleeve (10), an inner sleeve (20) and at least one driving unit (30). The outer sleeve is fixedly connected to the base. The inner sleeve is movably inserted into the outer sleeve along the height direction and the opposite direction. The inner sleeve is fixedly connected to the medical apparatus. Each driving unit is connected to the inner sleeve and the outer sleeve and can simultaneously apply a pushing force to the inner and outer sleeves to drive the relative movement of the inner and outer sleeves. The two ends of each driving unit are connected to the inner and outer sleeves through a hinged pair, so that the two ends can simultaneously rotate relative to the inner and outer sleeves around the axes perpendicular to the height direction and parallel to each other. The lifting column can effectively avoid the connection between the driving unit and the inner and outer sleeves from being out of coordination, effectively reduce the probability of alternating stress generated in the driving unit, and reduce the requirement for the machining precision of the parts. The medical device comprising the lifting column is also provided.

Description

Technical Field

[0001] This utility model relates to the field of medical equipment technology, and in particular to a lifting column for medical equipment and a medical device including the same. Background Technology

[0002] In the traditional lifting column structure of medical equipment, the drive unit, such as the gas spring and push rod, is rigidly connected between the inner and outer sleeves through threaded holes and bolts. Since the drive unit is a rigid component and only moves axially, the positional accuracy of the corresponding positioning holes on the inner and outer sleeves must not exceed 0.1mm.

[0003] In addition, during installation, it is necessary to ensure that the gaps around the inner and outer sleeves are uniform to reduce the impact on the coaxiality of the positioning holes, which also places high demands on installation accuracy.

[0004] In medical devices such as mobile C-arms, the lower end of the outer sleeve is fixed to the base of the mobile C-arm, while the upper end of the inner sleeve is fixed to the C-arm. The torque of the C-arm acts on the upper end of the inner sleeve. In this configuration, the entire lifting column is equivalent to a cantilever beam with its lower end fixed and its upper end free. Under load, the lifting column will undergo slight flexural deformation. When an eccentric load moment exists, the entire lifting column will bend slightly to the left or right. Since the two ends of the drive unit are rigidly connected to the inner and outer sleeves respectively, the two ends of the drive unit are forced to bend in tandem with the deformation of the inner and outer sleeves. This constraint places the drive unit in an undesirable elastic bending deformation state. This elastic bending deformation induces a lateral elastic restoring force within the drive unit. This lateral elastic restoring force can not only cause failure in the fit of connections such as threaded holes and bolts, resulting in loosening, slippage, or damage, but also generate alternating stress within the drive unit, significantly increasing the risk of fatigue damage and ultimately reducing the reliability of the entire lifting column. Utility Model Content

[0005] The purpose of this invention is to provide a lifting column for medical equipment, which can effectively prevent the failure of the connection between each drive unit and the inner and outer sleeves, effectively reduce the probability of alternating stress generated inside each drive unit, and at the same time reduce the requirements for the machining accuracy of the parts.

[0006] Another objective of this invention is to provide a medical device including the aforementioned lifting column, which can effectively prevent the connection failure between each drive unit and the inner and outer sleeves, effectively reduce the probability of alternating stress generated inside each drive unit, and reduce the requirements for the machining accuracy of parts.

[0007] The lifting column of the medical device provided by this utility model includes an outer sleeve, an inner sleeve, and at least one drive unit. The medical device also includes a medical device and a base. The lifting column is used to drive the medical device to move relative to the base along the height direction and its opposite direction. The outer sleeve is used to fixably connect to the base. The inner sleeve is movably inserted into the outer sleeve along the height direction and its opposite direction. The inner sleeve is used to fixably connect to the medical device. Each drive unit connects the inner sleeve and the outer sleeve. Each drive unit is configured to simultaneously apply a thrust to both the inner sleeve and the outer sleeve to drive relative movement between them. The two ends of each drive unit are respectively connected to the inner sleeve and the outer sleeve via hinges, so that both ends can simultaneously rotate relative to the inner sleeve and the outer sleeve about axes perpendicular to the height direction and parallel to each other.

[0008] The two ends of each drive unit are connected to the inner and outer sleeves by hinged joints. When the inner and outer sleeves deform, the two ends of each drive unit rotate relative to the inner and outer sleeves. This effectively avoids the failure of the connection between each drive unit and the inner and outer sleeves. It can also effectively reduce the probability of alternating stress generated inside each drive unit when there is an off-center load moment on the lifting column, and at the same time reduce the requirements for the machining accuracy of the parts.

[0009] In another illustrative embodiment of the lifting column of the medical device, two connecting bodies are also included. The two connecting bodies connect to the inner sleeve and the outer sleeve, respectively. The inner sleeve and the outer sleeve are nested together to form an inner cavity. The two connecting bodies are located at opposite ends of the inner cavity along the height direction, and each drive unit is located within the inner cavity with its two ends connected to the two connecting bodies. This helps to save space.

[0010] In another illustrative embodiment of the lifting column of the medical device, at least one end of at least one drive unit forms a rotary joint with the connecting body. This structure is simple and has good stability.

[0011] In another illustrative embodiment of the lifting column of the medical device, at least one connecting body includes a main body, two opposing first cavity walls, two opposing second cavity walls, and a first rotating shaft. Both the first and second cavity walls are disposed on the main body in a direction parallel to the height direction, and the two first and two second cavity walls are connected end-to-end to form a cavity. The end of the drive unit that forms a rotary joint with the connecting body is inserted into the cavity and rotatably connected to the two first cavity walls via the first rotating shaft about a first axis, the first axis being the axis of the first rotating shaft. A first gap is provided between the end of the drive unit inserted into the cavity and the second cavity wall in a direction perpendicular to the first axis and the height direction. This rotary joint structure is simple and has good stability. The first gap allows both ends of the drive unit to rotate relative to the connecting body within a limited space, avoiding excessive rotation that could lead to structural instability.

[0012] In another illustrative embodiment of the lifting column of the medical device, the connecting body has two first grooves spaced apart. The two first grooves extend in a direction parallel to a first axis. A cavity is formed in the portion of the connecting body between the two first grooves to form two first cavity walls and two second cavity walls. The first cavity walls and second cavity walls form an integral structure with the main body, which has good stability and also helps to save materials.

[0013] In another illustrative embodiment of the lifting column of the medical device, at least one connecting body includes a main body,

[0014] The connecting part and the second rotating shaft are included. The connecting part is fixed to the main body and has a protrusion that extends out of the main body in a direction parallel to the height direction. Two receiving grooves are provided on both sides of the protrusion. A second groove extending in a direction parallel to the height direction is provided at the end of the drive unit that forms a rotary pair with the connecting body. When the protrusion is inserted into the second groove, the two groove walls of the second groove are inserted into the two receiving grooves. The second rotating shaft connects the two groove walls of the protrusion and the second groove, so that the end of the drive unit that forms a rotary pair with the connecting body is rotatably connected to the connecting part via the second rotating shaft about a second axis, the second axis being the axis of the second rotating shaft. A second gap is provided between the end of the connecting part of the drive unit and the groove wall of the receiving groove in a direction perpendicular to the second axis and the height direction. This structure is simple, stable, and easy to install. The second gap allows both ends of the drive unit to rotate relative to the connecting body within a limited space, avoiding excessive rotation that could lead to structural instability.

[0015] In another illustrative embodiment of the lifting column of the medical device, at least one end of at least one drive unit is connected to the connector via a spherical joint. This structure is simple and easy to install.

[0016] In another illustrative embodiment of the lifting column of the medical device, at least one ball joint connector is also included. The ball joint connector includes a base, a connecting ball head, and a limiting member. A spherical cavity is formed at one end of the base. The connecting ball head includes a ball head end, a neck, and a main body. The diameter of the ball head end is larger than the diameter of the neck, and the ball head end is embedded in the spherical cavity to form a spherical pair. The main body connects to one of the connecting body and the drive unit, and the other end of the base connects to the other of the connecting body and the drive unit. The limiting member is fitted onto the neck and connected to the base to restrict the ball head end within the spherical cavity. A third gap is provided between the limiting member and the neck along the radial direction of the neck. This structure is simple and easy to install. The third gap allows both ends of the drive unit to rotate relative to the connecting body within a limited space, avoiding excessive rotation that could lead to structural instability.

[0017] In another illustrative embodiment of the lifting column of the medical equipment, the limiting component is a threaded sleeve or composed of several fixing plates.

[0018] In another illustrative embodiment of the lifting column of the medical device, one of the driving units is a push rod motor, which includes a push rod and a body, and the push rod and the body are respectively connected to two connecting bodies.

[0019] In another illustrative embodiment of the lifting column of the medical device, one of the driving units is a gas spring, and the sleeve and piston rod of the gas spring are respectively connected to two connecting bodies.

[0020] In another illustrative embodiment of the lifting column of the medical device, a friction-reducing plate is also included. The friction-reducing plate is disposed on the inner wall surface of the outer sleeve and the outer wall surface of the inner sleeve to reduce the friction between the inner sleeve and the outer sleeve when the inner sleeve moves relative to the outer sleeve in the height direction and in the opposite direction.

[0021] In another illustrative embodiment of the lifting column of the medical device, a friction-reducing plate is also included. The friction-reducing plate is disposed on the inner wall surface of the outer sleeve or the outer wall surface of the inner sleeve to reduce the friction between the inner sleeve and the outer sleeve when the inner sleeve moves relative to the outer sleeve in the height direction and in the opposite direction.

[0022] In another illustrative embodiment of the lifting column of the medical device, a contact piece and a micro switch are also included. The contact piece is fixed to the outer wall of the inner sleeve, and a guide ramp is provided at the lower end of the contact piece along the height direction. The micro switch is disposed in the outer sleeve. The trigger of the micro switch extends into the interior of the outer sleeve through an opening formed in the side wall of the outer sleeve. When the inner sleeve moves along the height direction, guided by the guide ramp, the contact piece moves relative to the trigger along the height direction to activate the micro switch. This facilitates the detection of the position of the medical device.

[0023] This utility model also provides a medical device, including a base, a medical device, and the aforementioned lifting column. An outer sleeve is fixedly connected to the base, and an inner sleeve is fixedly connected to the medical device. This medical device can effectively prevent misfitting at the connection points between the drive units and the inner and outer sleeves, effectively reduce the probability of alternating stress generated inside each drive unit, and simultaneously reduce the requirements for the precision of parts machining. Attached Figure Description

[0024] The following figures are for illustrative purposes only and do not limit the scope of the present invention.

[0025] Figure 1 This is used to illustrate a schematic connection relationship of the lifting column in medical equipment.

[0026] Figure 2 This is a schematic diagram illustrating one possible implementation of a lifting column.

[0027] Figure 3 for Figure 2 Schematic diagram of cross-section along III-III.

[0028] Figure 4 for Figure 3 A magnified view of part IV in the middle.

[0029] Figure 5 This is an exploded structural diagram illustrating one illustrative embodiment of a rotary joint.

[0030] Figure 6 This is an exploded structural diagram illustrating another illustrative embodiment of a rotary joint.

[0031] Figure 7 For illustrative purposes Figure 6 The diagram shows the installation structure of the rotary joint.

[0032] Figure 8 for Figure 2 A cross-sectional view along VIII-VIII.

[0033] Figure 9 for Figure 8 A magnified view of a portion of the IX module.

[0034] Figure 10 for Figure 8 A magnified view of part of X.

[0035] Figure 11 For illustrative purposes Figure 10 The diagram shows an exploded view of the ball joint connector.

[0036] Figure 12 This is a schematic diagram illustrating the exploded structure of a friction-reducing plate.

[0037] Figure 13 for Figure 12 A magnified view of part of XIII.

[0038] Label Explanation

[0039] 10. Outerwear

[0040] 11. Inner cavity

[0041] 12 Openings

[0042] 20 Inner Sleeve

[0043] 30 drive units

[0044] 31 Second Groove

[0045] 40 Connector

[0046] 41 body

[0047] 42 First cavity wall

[0048] 43 Second cavity wall

[0049] 44 First Rotating Shaft

[0050] 45 Cavity

[0051] 451 First gap

[0052] 46 First Groove

[0053] 47 Connecting part

[0054] 471 Protrusion

[0055] 472 Receiving Tank

[0056] 473 Second gap

[0057] 48 Second rotating shaft

[0058] 50 Ball joint connector

[0059] 51 Base

[0060] 511 Spherical cavity

[0061] 52 Connecting ball head

[0062] 521 Ball head end

[0063] 522 Neck

[0064] 523 Main Body

[0065] 53 Limiting components

[0066] 531 Third gap

[0067] 60 Anti-friction tablets

[0068] 71 contact pad

[0069] 711 Guide sloping surface

[0070] 72 Micro switch

[0071] 80 base

[0072] 90 Medical Devices

[0073] H (height direction)

[0074] S Rotation direction

[0075] X1 First axis

[0076] X2 Second Axis Detailed Implementation

[0077] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, specific embodiments of the present utility model are now described with reference to the accompanying drawings, in which the same reference numerals denote the same parts.

[0078] In this document, “illustrative” means “serving as an example, illustration or description”, and any illustration or implementation described herein as “illustrative” should not be construed as a more preferred or advantageous technical solution.

[0079] In this document, "first," "second," and "third" do not indicate their importance or order, but are only used to distinguish them from each other for the purpose of document description.

[0080] To keep the drawings simple, each drawing only schematically shows the parts related to this utility model, and they do not represent the actual structure of the product.

[0081] Figure 1 This is used to illustrate a schematic connection relationship of the lifting column in medical equipment. Figure 2 This is a schematic diagram illustrating one possible implementation of a lifting column. Figure 3 for Figure 2 Schematic cross-sectional view along III-III. See also Figures 1 to 3 The medical device includes a lifting column, a base 80, and a medical device 90. In this illustrative embodiment, the medical device is a movable C-arm, and the medical device is the C-arm of the movable C-arm. However, it is not limited to this; the medical device may also be other equipment or mechanical structures. The lifting column is used to drive the medical device 90 to move relative to the base 80 along the height direction H and in the opposite direction.

[0082] See Figure 3 The lifting column of the medical device includes an outer sleeve 10, an inner sleeve 20, and two drive units 30. In this illustrative embodiment, one drive unit 30 is a push rod motor, and the other drive unit 30 is a gas spring. However, it is not limited to this; all drive units 30 may be push rod motors or all may be gas springs, or push rod motors or gas springs may be combined with other drive mechanisms, or all may be other drive mechanisms. The number of drive units 30 may also be one or more, which can be flexibly adjusted according to actual application requirements.

[0083] The outer sleeve 10 is used to fix the base 80. The inner sleeve 20 is movably inserted into the outer sleeve 10 along the height direction H and its opposite direction. The inner sleeve 20 is used to fix the medical device 90. Each drive unit 30 connects the inner sleeve 20 and the outer sleeve 10. Each drive unit 30 is configured to simultaneously apply a thrust to the inner sleeve 20 and the outer sleeve 10 to drive relative movement between them. The two ends of each drive unit 30 are respectively connected to the inner sleeve 20 and the outer sleeve 10 via hinges, so that the two ends can simultaneously rotate relative to the inner sleeve 20 and the outer sleeve 10 about axes perpendicular to the height direction H and parallel to each other.

[0084] The two ends of each drive unit 30 are connected to the inner sleeve 20 and the outer sleeve 10 by hinged joints. When the inner and outer sleeves deform, the two ends of each drive unit 30 rotate relative to the inner and outer sleeves, which effectively avoids the failure of the connection between each drive unit 30 and the inner and outer sleeves. It can also effectively reduce the probability of alternating stress generated inside each drive unit 30 when there is an off-center load moment on the lifting column, and at the same time reduce the requirements for the machining accuracy of the parts.

[0085] Specifically, such as Figure 3 As shown in this illustrative embodiment, the lifting column also includes two connecting bodies 40. The two connecting bodies 40 are respectively connected to the inner sleeve 20 and the outer sleeve 10. Figure 3 The upper connector 40 is roughly cylindrical, while Figure 3 The lower connector 40 is generally flat, which is determined by the actual application requirements. In other illustrative embodiments, the connector 40 can be flexibly set to various different shapes. The inner sleeve 20 and the outer sleeve 10 are nested together to form an inner cavity 11. The two connectors 40 are located at both ends of the inner cavity 11 along the height direction H. Each drive unit 30 is located in the inner cavity 11, and both ends of each drive unit 30 are connected to the two connectors 40. This helps to save space.

[0086] Figure 3 The drive unit 30 on the left is a push rod motor, and its two ends are respectively connected to two connecting bodies 40 to form two rotary joints. The axes of the two rotary joints are perpendicular to the height direction H and are parallel to each other. Figure 3 The drive unit 30 on the right is a gas spring, and its two ends are connected to the connecting body 40 through two ball joint connectors 50. However, it is not limited to this. Each drive unit 30 can be connected to the connecting body 40 in a manner that forms a rotary joint, or each drive unit 30 can be connected to the connecting body 40 through a spherical joint, or each drive unit 30 can be configured such that one end is connected to one connecting body 40 in a manner that forms a rotary joint, and the other end is connected to another connecting body 40 through a spherical joint.

[0087] Figure 4 and Figure 5 as well as Figure 6 and Figure 7 Two illustrative implementations of the slewing joint are given as examples. Figure 4 for Figure 3 A magnified view of part IV in the middle. Figure 5 This is an exploded structural diagram illustrating one schematic embodiment of a slewing joint. See also: Figure 4 and Figure 5 , Figure 4 and Figure 5 The connector 40 shown is Figure 3 The connecting body 40, located at the top, is generally cylindrical, but not limited to this. The connecting body 40 includes a main body 41, two opposing first cavity walls 42, two opposing second cavity walls 43, and a first rotating shaft 44. The first cavity walls 42 and the second cavity walls 43 are both arranged in a direction parallel to the height direction H on the main body 41, and the two first cavity walls 42 and the two second cavity walls 43 are connected end-to-end to form a cavity 45. The end of the drive unit 30 that forms a rotating pair with the connecting body 40 (i.e.,...) Figure 3 The upper end of the left-side drive unit 30 is inserted into the cavity 45 and is rotatably connected to the two first cavity walls 42 via the first rotating shaft 44 around the first axis X1, with the rotation direction S as follows. Figure 4 As shown. The end of the insertion cavity 45 of the drive unit 30 is perpendicular to the first axis X1 and the height direction H in the direction between the second cavity wall 43 and the cavity wall 43. Figure 4 A first gap 451 is provided in the left and right directions of the slewing joint. This slewing joint has a simple structure and good stability. The existence of the first gap 451 allows the two ends of the drive unit 30 to rotate relative to the connecting body 40 within a limited space, avoiding structural instability caused by excessive rotation.

[0088] See Figure 5 The connecting body 40 has two first grooves 46 spaced apart. The two first grooves 46 extend along an axis X1 parallel to the first rotating shaft. A cavity 45 is formed in the portion of the connecting body 40 located between the two first grooves 46 to form two first cavity walls 42 and two second cavity walls 43. The first cavity walls 42 and second cavity walls 43 form an integral structure with the body 41, providing good stability and saving material. The two first grooves 46 facilitate the installation of the first rotating shaft 44.

[0089] However, this is not the only possibility. In other illustrative embodiments, the two first cavity walls 42 and the two second cavity walls 43, as well as the cavity formed by them, may be structures independent of the main body 41, which are mechanically connected to the main body 41.

[0090] Figure 6 This is an exploded structural diagram illustrating another illustrative embodiment of a rotary joint. Figure 7 For illustrative purposes Figure 6The diagram shows the installation structure of the slewing joint. (See attached diagram.) Figure 6 and Figure 7 In an illustrative embodiment, the connector 40 includes a body 41, a connecting portion 47, and a second rotating shaft 48. Figure 6 The connector 40 shown is Figure 3 The connecting body 40, which is generally flat and located below, is not limited to this. The connecting portion 47 is fixed to the body 41 and has a protrusion 471 that protrudes from the body 41 in a direction parallel to the height direction H. Figure 6 In the middle, the connecting part 47 protrudes from the body 41 by means of bolt connection. However, it is not limited to this; the connecting part 47 and the body 41 can also be an integral structure, or they can be connected by other means and protrude from the body 41. The connecting part 47 has two receiving grooves 472 on both sides of the protrusion 471. The end of the drive unit 30 that forms a rotary pair with the connecting body 40 (i.e. Figure 6 The lower end of the drive unit 30 shown has a second groove 31 extending in a direction parallel to the height direction H. When the protrusion 471 is inserted into the second groove 31, the two groove walls of the second groove 31 are inserted into two receiving grooves 472. The second rotating shaft 48 connects the protrusion 471 and the two groove walls of the second groove 31, so that the end of the drive unit 30 that forms a rotating pair with the connecting body 40 (i.e., Figure 6 The lower end of the drive unit 30 shown is rotatably connected to the connecting part 47 via the second rotating shaft 48 about the second axis X2, and the rotation direction S is as follows. Figure 7 As shown. The end of the connection part 47 of the drive unit 30 (i.e. Figure 6 A second gap 473 is provided between the lower end of the drive unit 30 shown and the wall of the receiving groove 472 in a direction perpendicular to the second axis X2 and the height direction H. Figure 7 (in the left and right directions). This structure is simple, stable, and easy to install. The second gap 473 allows the two ends of the drive unit 30 to rotate within a limited space relative to the connecting body 40, avoiding excessive rotation that could lead to structural instability.

[0091] Figure 8 for Figure 2 A cross-sectional view along VIII-VIII. In the illustrative embodiment, Figure 8 The drive unit 30 on the left is a gas spring, and its two ends are connected to the connecting body 40 through two ball joint connectors 50. This structure is simple and easy to install.

[0092] Figure 9 as well as Figure 10 and Figure 11 Two illustrative embodiments of the ball joint connector are illustrated with examples, in which... Figure 9 for Figure 8 A magnified view of a portion of the IX module. See also... Figure 9 In this illustrative embodiment, the ball joint connector 50 includes a base 51, a connecting ball head 52, and a limiting member 53. The limiting member 53 is a threaded sleeve. One end of the base 51 has a spherical cavity 511. The connecting ball head 52 sequentially includes a ball head end 521, a neck 522, and a body portion 523. The diameter of the ball head end 521 is larger than the diameter of the neck 522, and the ball head end 521 is embedded in the spherical cavity 511 to form a spherical pair. The body portion 523 is threadedly connected to the drive unit 30, and the other end of the base 51 is threadedly connected to the connector 40. However, this is not the only embodiment; in other illustrative embodiments, the body portion 523 may also be connected to the connector 40, and the other end of the base 51 may also be connected to the drive unit 30. The limiting member 53 is sleeved on the neck 522 and connected to the base 51 to restrict the ball head end 21 within the spherical cavity 511. The limiting member 53 and the neck 522 are positioned radially (i.e.,...) of the neck 522. Figure 9 A third gap 531 is provided in the left and right directions of the drive unit 30. This structure is simple and easy to install. The third gap 531 allows the two ends of the drive unit 30 to rotate relative to the connecting body 40 within a limited space, avoiding excessive rotation that could lead to structural instability.

[0093] It should be noted that the main body 523 can also be a split structure, that is, divided into two parts, an inner and an outer part, the inner part being a screw that is integrally formed with the ball end 521 and the neck 522 (e.g. Figure 9 (As shown by the dashed line in the diagram), the outer part is a threaded sleeve that connects to the internal thread. The screw is connected to the drive unit 30 or the connecting body 40 via the threaded sleeve.

[0094] Figure 10 for Figure 8 A magnified view of part of X. Figure 11 For illustrative purposes Figure 10 The diagram shows an exploded view of the ball joint connector. (See also...) Figure 10 and Figure 11 In this illustrative embodiment, the structure of the ball joint connector 50 is similar to... Figure 9 The similarities between the ball joint connector 50 shown are not repeated here, and its structure is similar to... Figure 9 The difference in the ball joint connector 50 shown is that its limiting member 53 is composed of two fixing plates. However, it is not limited to this; in other illustrative embodiments, the number of fixing plates may be more than two. This is achieved through threaded holes formed in the limiting member 53 and the base 51. Figure 11 (not marked in the text) and bolts ( Figure 11 (Not shown in the drawing), the limiting member 53 and the base 51 are connected together to the connecting body 40 ( Figure 11 Not shown in the drawing, please refer to Figure 10The main body 523 is connected to the drive unit 30. However, it is not limited to this. The limiting member 53 and the base 51 can also be connected to the drive unit 30 together, while the main body 523 is connected to the connector 40.

[0095] Figure 12 This is a schematic diagram illustrating the exploded structure of a friction-reducing plate. See also... Figure 12 In this illustrative embodiment, the lifting column also includes several friction-reducing plates 60 ( Figure 12 Only two friction-reducing plates 60 located on the inner sleeve 20 and two friction-reducing plates 60 located on the outer sleeve 10 are schematically shown. The friction-reducing plates 60 are disposed on the inner wall surface of the outer sleeve 10 and the outer wall surface of the inner sleeve 20 to reduce the friction between the inner sleeve 20 and the outer sleeve 10 when the inner sleeve 20 moves relative to the outer sleeve in the height direction H and the opposite direction. However, this is not the only limitation. In other illustrative embodiments, the friction-reducing plates 60 may also be disposed on only one of the inner wall surface of the outer sleeve 10 and the outer wall surface of the inner sleeve 20. The number of friction-reducing plates 60 can also be flexibly adjusted according to the actual application scenario.

[0096] Figure 13 for Figure 12 A magnified view of a portion of XIII. See also... Figure 12 and Figure 13 In this illustrative embodiment, the lifting column also includes a contact piece 71 and a micro switch 72. The contact piece 71 is fixed to the outer wall of the inner sleeve 20, and a guide slope 711 is provided at the lower end of the contact piece 71 along the height direction H. The micro switch 72 is disposed on the outer sleeve 10. The trigger of the micro switch 72 (… Figure 12 (Not shown in the drawing) It extends into the interior of the outer sleeve 10 through the opening 12 formed on the side wall of the outer sleeve 10. When the inner sleeve 20 moves along the height direction H, the contact piece 71 moves relative to the trigger along the height direction H under the guidance of the guide slope 711 to trigger the micro switch 72.

[0097] The lifting column is internally equipped with two limit switches that restrict the upper and lower extreme positions, thereby limiting the movement of the inner sleeve 20 relative to the outer sleeve 10 along the height direction H and in the opposite direction to the upper and lower extreme positions, wherein the lower extreme position is located at... Figure 12 The lower connector 40 and the microswitch 72 are shown below. During downward movement along the height direction H, as... Figure 12 As shown, when the contact piece 71 contacts the trigger, it triggers the micro switch 72 and maintains contact. The micro switch 72 continuously sends signals to indicate the running position of the inner sleeve 20, so as to remind the operator to pay attention to prevent rigid collisions caused by excessive movement speed.

[0098] This utility model also provides a medical device, including a base 80, a medical device 90, and the aforementioned lifting column. An outer sleeve 10 is fixedly connected to the base 80, and an inner sleeve 20 is fixedly connected to the medical device 90. This medical device can effectively prevent misfitting at the connection points between each drive unit 30 and the inner and outer sleeves, effectively reduce the probability of alternating stress generated inside each drive unit 30, and simultaneously reduce the requirements for the precision of parts machining.

[0099] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0100] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present invention and are not intended to limit the scope of protection of the present invention. All equivalent implementation schemes or modifications made without departing from the spirit of the present invention, such as combinations, divisions or repetitions of features, should be included within the scope of protection of the present invention.

Claims

1. A lifting column for a medical device, the medical device further comprising a medical device and a base, the lifting column being used to drive the medical device to move relative to the base along a height direction (H) and its opposite direction, characterized in that, The lifting column includes: Outer sleeve (10), which is used to fix the base; An inner sleeve (20), movably inserted into the outer sleeve (10) along the height direction (H) and its opposite direction, the inner sleeve (20) being used to securely connect the medical device; and At least one drive unit (30) is connected to the inner sleeve (20) and the outer sleeve (10). Each drive unit (30) is configured to simultaneously apply a thrust to the inner sleeve (20) and the outer sleeve (10) to drive the inner sleeve (20) and the outer sleeve (10) to move relative to each other. The two ends of each drive unit (30) are respectively connected to the inner sleeve (20) and the outer sleeve (10) through a hinge joint, so that the two ends of the drive unit (30) can simultaneously rotate relative to the inner sleeve (20) and the outer sleeve (10) about axes that are perpendicular to the height direction (H) and parallel to each other.

2. The lifting column as described in claim 1, characterized in that, It also includes two connectors (40), which are respectively connected to the inner sleeve (20) and the outer sleeve (10). The inner sleeve (20) and the outer sleeve (10) are sleeved together and form an inner cavity (11). The two connectors (40) are respectively located at both ends of the inner cavity (11) along the height direction (H). Each drive unit (30) is located in the inner cavity (11) and its two ends are respectively connected to the two connectors (40).

3. The lifting column as described in claim 2, characterized in that, At least one end of at least one of the drive units (30) forms a rotary pair with the connector (40).

4. The lifting column as described in claim 3, characterized in that, At least one of the connectors (40) includes: Ontology(41), Two opposing first cavity walls (42) and two opposing second cavity walls (43) are arranged on the body (41) along a direction parallel to the height direction (H). The two first cavity walls (42) and the two second cavity walls (43) are connected end to end to form a cavity (45). The first rotating shaft (44) is inserted into the cavity (45) at the end of the drive unit (30) that forms a rotating pair with the connector (40) and is rotatably connected to the two first cavity walls (42) around the first axis (X1) via the first rotating shaft (44). The first axis (X1) is the axis of the first rotating shaft (44). A first gap (451) is provided between the end of the drive unit (30) inserted into the cavity (45) and the second cavity wall (43) in a direction perpendicular to the first axis (X1) and the height direction (H).

5. The lifting column as described in claim 4, characterized in that, The connector (40) has two first grooves (46) spaced apart, the two first grooves (46) extending in a direction parallel to the first axis (X1), and the portion of the connector (40) located between the two first grooves (46) forms the cavity (45) to form two first cavity walls (42) and two second cavity walls (43).

6. The lifting column as described in claim 3, characterized in that, At least one of the connectors (40) includes: Ontology(41), A connecting part (47) is fixed to the body (41) and has a protrusion (471) protruding from the body (41) in a direction parallel to the height direction (H). The connecting part (47) has two receiving grooves (472) on both sides of the protrusion (471). The end of the drive unit (30) that forms a rotary joint with the connecting body (40) has a second groove (31) extending in a direction parallel to the height direction (H). When the protrusion (471) is inserted into the second groove (31), the two groove walls of the second groove (31) are inserted into the two receiving grooves (472). The second rotating shaft (48) connects the protrusion (471) and the two groove walls of the second groove (31) so that the end of the drive unit (30) that forms a rotating pair with the connector (40) is rotatably connected to the connecting part (47) via the second rotating shaft (48) about the second axis (X2). The second axis (X2) is the axis of the second rotating shaft (48). A second gap (473) is provided between the end of the drive unit (30) that connects to the connecting part (47) and the groove wall of the receiving groove (472) in a direction perpendicular to the second axis (X2) and the height direction (H).

7. The lifting column as described in claim 2, characterized in that, At least one end of at least one drive unit (30) is connected to the connector (40) via a spherical joint.

8. The lifting column as described in claim 7, characterized in that, It also includes at least one ball joint connector (50), each of the ball joint connectors (50) comprising: The base (51) has a spherical cavity (511) at one end. The connecting ball head (52) comprises, in sequence, a ball head end (521), a neck (522), and a main body (523). The diameter of the ball head end (521) is larger than the diameter of the neck (522). The ball head end (521) is embedded in the spherical cavity (511) to form a spherical pair. The main body (523) connects one of the connecting body (40) and the driving unit (30). The other end of the base (51) connects the other of the connecting body (40) and the driving unit (30). A limiting member (53) is sleeved on the neck (522) and connected to the base (51) to restrict the ball end (521) within the spherical cavity (511). A third gap (531) is provided between the limiting member (53) and the neck (522) along the radial direction of the neck (522).

9. The lifting column as described in claim 8, characterized in that, The limiting component (53) is a threaded sleeve or is composed of several fixing plates.

10. The lifting column as described in claim 2, characterized in that, One of the drive units (30) is a push rod motor, which includes a push rod and a body, and the push rod and the body are respectively connected to two connecting bodies (40).

11. The lifting column as described in claim 2, characterized in that, One of the drive units (30) is a gas spring, and the sleeve and piston rod of the gas spring are respectively connected to the two connecting bodies (40).

12. The lifting column as described in claim 1, characterized in that, It also includes a friction reducing plate (60), which is disposed on the inner wall of the outer sleeve (10) and / or the outer wall of the inner sleeve (20) to reduce the friction between the inner sleeve (20) and the outer sleeve (10) when the inner sleeve (20) moves relative to the outer sleeve (10) along the height direction (H) and its opposite direction.

13. The lifting column as described in claim 1, characterized in that, It also includes a contact (71) and a micro switch (72). The contact (71) is fixed to the outer wall of the inner sleeve (20). The contact (71) has a guide slope (711) at its lower end along the height direction (H). The micro switch (72) is disposed in the outer sleeve (10). The trigger of the micro switch (72) extends into the interior of the outer sleeve (10) through an opening (12) on the side wall of the outer sleeve (10). When the inner sleeve (20) moves along the height direction (H), the contact (71) moves relative to the trigger along the height direction (H) under the guidance of the guide slope (711) to trigger the micro switch (72).

14. A medical device, characterized in that, include: Base (80); Medical device (90); and A lifting column as described in any one of claims 1 to 13, wherein the outer sleeve (10) is fixedly connected to the base (80), and the inner sleeve (20) is fixedly connected to the medical device (90).

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