Sleep table and nuclear magnetic resonance device
By replacing the hydraulic and synchronous belt slide system with a rigid chain in the MRI device, the problems of system complexity and stability were solved, resulting in faster and more stable equipment operation and greater patient comfort.
Patent Information
- Application Number
- CN202422284081.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-19
- Publication Date
- 2026-01-20
- Estimated Expiration
- 2034-09-19
AI Technical Summary
In existing MRI devices, the hydraulic system and the synchronous belt slide are independent drive systems, which leads to high system complexity, slow speed, low efficiency, and easy leakage, affecting the stability of equipment operation and patient comfort.
A rigid chain is used to replace the hydraulic lifting system and the two-stage synchronous belt slide system. The rigid chain is controlled by a drive device to retract and release, thereby enabling the movement of the top plate and the platform, simplifying the transmission structure and improving the system rigidity.
It improves the system's operating speed and stability, reduces system complexity and size, decreases maintenance costs, and enhances patient comfort and ease of operation.
Smart Images
Figure CN223810637U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a bed and a nuclear magnetic resonance device. BACKGROUND
[0002] The nuclear magnetic resonance device is usually equipped with a bed on which a patient can lie flat, and the bed comprises a table body and a top plate. The table body is lifted by a hydraulic system, and the top plate is horizontally moved by a synchronous belt sliding table. The existing hydraulic system and synchronous belt sliding table have the following disadvantages: the lifting drive of the table body and the horizontal moving drive of the top plate are two independent drive and structure systems, which increases the complexity of the system. The hydraulic system is slow and inefficient, and the table body is not stable and uniform in lifting. In addition, the hydraulic system is prone to internal leakage, which further reduces the rigidity of the system. In order to realize a longer extension size of the top plate, the synchronous belt sliding table usually has a two-stage drive structure, which further increases the complexity and size of the system. SUMMARY
[0003] The utility model discloses a bed and a nuclear magnetic resonance device, which uses a rigid chain to replace the hydraulic lifting system and the two-stage synchronous belt sliding table system, thereby improving the operation speed, stability and rigidity of the system, and reducing the complexity and size of the system.
[0004] To solve the above technical problems, the bed provided by the utility model has the following technical solutions: a top plate for carrying a detected object; a table body arranged at the lower part of the top plate and used for supporting the top plate; a base arranged at the lower part of the table body and used for supporting the table body; a rigid chain with an upper end connected to the top plate and the table body; and a drive device used for controlling the recovery and release of the lower end of the rigid chain, so as to horizontally move the top plate and vertically move the table body.
[0005] The utility model also provides a nuclear magnetic resonance device with the above bed.
[0006] According to the above embodiment, the drive device drives the recovery and release of the lower end of the rigid chain, so as to vertically or horizontally move the upper end of the rigid chain, and then horizontally move the top plate and vertically move the table body together with the top plate. BRIEF DESCRIPTION OF DRAWINGS
[0007] Figure 1 FIG. 1 is a schematic view of the first working condition of the first embodiment of the utility model;
[0008] Figure 2 FIG. 2 is a schematic view of the second working condition of the first embodiment of the utility model;
[0009] Figure 3 FIG. 3 is a schematic view of the connection relationship of the drive device, the first clutch, the second clutch, the first rigid chain and the second rigid chain of the first embodiment of the utility model.
[0010] Figure 4 The schematic view of the nesting relationship of the first rigid chain and the second rigid chain of the second embodiment of the utility model;
[0011] Figure 5 The schematic view of the connection relationship of the driving device, the first clutch, the second clutch, the first rigid chain and the second rigid chain of the first working condition of the second embodiment of the utility model;
[0012] Figure 6 The schematic view of the connection relationship of the driving device, the first clutch, the second clutch, the first rigid chain and the second rigid chain of the second working condition of the second embodiment of the utility model;
[0013] Figure 7 The top view of the third embodiment of the utility model;
[0014] Figure 8 The sectional view of A-A direction of Figure 7
[0015] Figure 9 The schematic view of the fourth embodiment of the utility model. DETAILED DESCRIPTION
[0016] The utility model will be described below according to the embodiment shown in the drawings. The embodiment disclosed this time can be considered as illustrative in all aspects and is not restrictive. The scope of the utility model is not limited by the explanation of the embodiments and is only indicated by the scope of the claims, and includes all modifications within the scope of the claims and with the same meaning as the claims.
[0017] The nuclear magnetic resonance device is usually equipped with a patient lying bed including a table body 13 and a top plate 12, the table body 13 is lifted through a hydraulic system, and the top plate 12 is horizontally moved by using a synchronous belt sliding table. The existing hydraulic system and synchronous belt sliding table have the following disadvantages: the lifting drive of the table body 13 and the horizontal movement drive of the top plate 12 are two independent drive and structure systems, which increases the complexity of the system, the hydraulic system is slow and low in efficiency, the lifting process of the table body 13 is not smooth and uniform, in addition, the oil cylinder of the hydraulic system is prone to internal leakage, which further reduces the rigidity of the system. In order to realize a longer top plate 12 extension size, the synchronous belt sliding table is a two-stage drive structure, which further increases the complexity and size of the system.
[0018] The above problems not only affect the operation efficiency and stability of the nuclear magnetic resonance device, but also have a negative impact on the comfort of the patient and the simplicity of the operation.
[0019] In order to improve the lifting of the table body 13 and the moving of the top plate 12 of the existing nuclear magnetic resonance device, and to improve the overall performance and user experience of the equipment, a bed of a nuclear magnetic resonance device is provided below.
[0020] (First embodiment)
[0021] In combination with Figure 1 and Figure 2 , the first embodiment provides a bed, which comprises a base 11, a top plate 12, a table body 13, a first rigid chain 21, a second rigid chain 22 and a driving device 3, wherein the top plate 12 is used to carry a detected object (such as a patient), the table body 13 is arranged at the lower part of the top plate 12 and is used to support the top plate 12, the top plate 12 can move along the length direction of the table body 13, the base 11 is arranged at the lower part of the table body 13 and is used to support the table body 13, the table body 13 can move along the vertical direction, the upper end of the first rigid chain 21 is fixedly connected to the top plate 12, the upper end of the second rigid chain 22 is fixedly connected to the table body 13, and the driving device 3 is used to control the retraction and release of the lower end of the first rigid chain 21 to horizontally move the top plate 12, and to control the retraction and release of the lower end of the second rigid chain 22 to vertically move the table body 13.
[0022] The top plate 12 and the table body 13 are connected through a first guide mechanism, which is used to guide the movement of the top plate 12 along the length direction of the table body 13, and the first guide mechanism is not shown in the figure. The first guide mechanism is usually a horizontally arranged guide rail, which is used to connect the top plate 12 and the table body 13.
[0023] The table body 13 and the base 11 are connected through a second guide mechanism, which is used to guide the movement of the table body 13 along the vertical direction. The second guide mechanism is usually a scissor arm 15, which is used to connect the table body 13 and the base 11. The two ends of the scissor arm 15 are connected to the table body 13 and the base 11. The scissor arm 15 can restrict the horizontal freedom of the table body 13, so that the table body 13 can only move vertically.
[0024] The rigid chain comprises a plurality of chain links. The chain links are automatically braked when subjected to force through the self-locking mechanism possessed by the rigid chain itself, and are automatically unlocked when released, so as to improve the safety of the lifting process. The chain links and the self-locking mechanism of the rigid chain are both made of non-metallic non-magnetic materials such as plastic or reinforced fiber materials, so as to avoid the influence of metal on the operation of the nuclear magnetic resonance device.
[0025] The driving device 3 is described below:
[0026] In combination with Figure 3In the first embodiment, the driving device 3 comprises an electric motor 31, a first sprocket 33, a second sprocket 34, a first clutch 41 and a second clutch 42, the first rigid chain 21 and the second rigid chain 22 are arranged side by side, the number of the electric motor 31 is one, the upper end of the first rigid chain 21 is connected to the ceiling 12 after being turned by the third sprocket 14, the electric motor 31 is installed on the base 11, the first sprocket 33 is engaged with the first rigid chain 21, the second sprocket 34 is engaged with the second rigid chain 22, the first rigid chain 21 is drivingly connected with the electric motor 31 through the first clutch 41, and the second rigid chain 22 is drivingly connected with the electric motor 31 through the second clutch 42.
[0027] Figure 3 The dashed arrow in the above figure indicates a transmission mechanism, such as a gear transmission mechanism, a synchronous belt transmission mechanism, etc., connecting the first clutch 41 and the second clutch 42 with the corresponding first sprocket 33 and second sprocket 34.
[0028] In addition, at least one of the second sprocket 34 and the second guide mechanism is installed with a brake (not shown in the figure), which is used to limit the movement of the second sprocket 34 and the second guide mechanism, so as to prevent the vertical movement of the table body 13.
[0029] As long as one of the second sprocket 34 and the second guide mechanism is braked, the vertical movement of the table body 13 can be prevented. For safety, two brakes can be used to brake the second sprocket 34 and the second guide mechanism at the same time.
[0030] On the other hand, in order to improve the torque of the electric motor 31, a gearbox 32 is connected to the output shaft of the electric motor 31, and the electric motor 31 outputs torque through the gearbox 32.
[0031] The movement process and state of the table body 13 and the ceiling 12 are described below:
[0032] In the first working condition, the second clutch 42 connects the second sprocket 34 and the electric motor 31, while the first clutch 41 disconnects the first sprocket 33 and the electric motor 31, the brake is unlocked to enable the vertical movement of the table body 13, the second sprocket 34 rotates, the second rigid chain 22 is retracted or released along the vertical direction, the first rigid chain 21 passively follows the movement of the second rigid chain 22, and the ceiling 12 and the table body 13 synchronously rise or fall.
[0033] Second working condition, the first clutch 41 connects the first sprocket 33 and the motor 31, while the second clutch 42 disconnects the second sprocket 34 and the motor 31, the brake is locked to prevent the vertical movement of the table body 13, the first sprocket 33 rotates, the second sprocket 34 does not rotate, the first rigid chain 21 below the table body 13 is retracted or released in the vertical direction, the first rigid chain 21 above the table body 13 and below the ceiling 12 moves in the horizontal direction, the table body 13 and the ceiling 12 keep the current height unchanged, and the ceiling 12 moves horizontally along the length direction of the table body 13.
[0034] When the brake is applied to the scissor arm 15, the brake can be a disc brake or a drum brake connected to the center rotating shaft of the scissor arm 15.
[0035] The chain links of the first rigid chain 21 must be made of non-metallic non-magnetic materials such as plastic or reinforced fiber materials, and the chain links of the second rigid chain 22 can be made of metallic materials or non-metallic non-magnetic materials.
[0036] The advantages of the above embodiment are:
[0037] The diagnosis time can be reduced, and the movement of the ceiling 12 is more stable, comfortable and fast through reasonable structural configuration and speed control of the motor 31.
[0038] The driving force can be greatly reduced (the power required for the hydraulic system to drive the scissor arm 15 to lift the table body 13 is about 5-10 times that of the rigid chain drive).
[0039] The size of the bed can be greatly reduced, and the transmission structure can be simplified.
[0040] The maintenance cost can be reduced, and if the chain link needs to be replaced, only one chain link needs to be replaced.
[0041] (Second embodiment)
[0042] In combination Figure 4 , Figure 5 , Figure 6 , the second embodiment differs from the first embodiment in that the first rigid chain 21 and the second rigid chain 22 are not arranged side by side, but the first rigid chain 21 is nested inside the second rigid chain 22.
[0043] The first rigid chain 21 includes a plurality of chain links, each chain link including a first pin shaft 211 and a first chain plate 212, and the first sprocket 33 is engaged with the first pin shaft 211.
[0044] The second rigid chain 22 also includes a plurality of chain links, each chain link including a second pin shaft 221 and a second chain plate 222, and the second sprocket 34 is engaged with the second pin shaft 221.
[0045] In combinationFigure 4 The first rigid chain 21 is disposed between two symmetrical first chain plates 212, and at least a portion of the second chain plates 222 are provided with a notch 223, which is located between two adjacent second pins 221. When the first rigid chain 21 rises to the end of its stroke, the notch 223 is used to avoid the shaft of the first sprocket 33.
[0046] Combination Figure 5 and Figure 6 The first clutch 41 is used to drive the first sprocket 33 to move, so that the first sprocket 33 can axially pass through the gap between the notch 223 and the two second pins 221 and engage or disengage with the first pin 211. The movement of the first sprocket 33 itself does not affect the transmission connection between the first sprocket 33 and the motor 31.
[0047] Figure 5 and Figure 6 The dashed arrows refer to the transmission mechanisms connecting the second clutch 42 to the corresponding second sprocket 34, and the transmission mechanisms connecting the gearbox 32 to the corresponding first sprocket 33, such as gear transmission mechanisms, synchronous belt transmission mechanisms, etc.
[0048] First working condition, combined with Figure 5 The second clutch 42 connects the second sprocket 34 and the motor 31. The first clutch 41 drives the first sprocket 33 to separate from the first rigid chain 21. The brake is unlocked so that the platform 13 can be raised and lowered vertically. The second sprocket 34 rotates, and the second rigid chain 22 is retracted or released along the vertical direction. The first rigid chain 21 passively follows the movement of the second rigid chain 22. The top plate 12 and the platform 13 rise or fall synchronously.
[0049] The second working condition, combined with Figure 5 The second clutch 42 disconnects the second sprocket 34 from the motor 31. The first clutch 41 drives the first sprocket 33 to engage with the first rigid chain 21. The brake locks, preventing the platform 13 from vertically lifting or lowering. The first sprocket 33 rotates, while the second sprocket 34 does not rotate. The first rigid chain 21 located below the platform 13 retracts or releases in the vertical direction. The first rigid chain 21 located above the platform 13 and below the ceiling 12 moves in the horizontal direction. The platform 13 and the ceiling 12 maintain their current height. The ceiling 12 moves along the length of the platform 13.
[0050] (Third Embodiment)
[0051] Combination Figure 7 , Figure 8 The third embodiment differs from the first and second embodiments in that the second guide mechanism uses a telescopic cylinder assembly 16 that can extend and retract in the vertical direction instead of the scissor arm 15.
[0052] The telescopic cylinder group 16 comprises a plurality of sliding cylinders 161 with gradually changed sizes and closely nested with each other, two sliding cylinders 161 at both ends of the telescopic cylinder group 16 are fixedly connected to the table body 13 and the base 11 respectively, the telescopic cylinder group 16 can restrict the freedom degree of the table body 13 in the horizontal direction, so that the table body 13 can only move vertically up and down, and can also cover the first rigid chain 21 and the second rigid chain 22 to prevent personnel and sundries from entering between the table body 13 and the base 11.
[0053] The adjacent sliding cylinders 161 can also be connected with each other through guide rails, which are not shown in the figure. The guide rails can make the movement of the sliding cylinders 161 more stable and smooth. When the brake is applied to the sliding cylinder 161, the brake can be a brake caliper connected to the guide rail.
[0054] The over-travel stop structure is also provided between the adjacent sliding cylinders 161, in combination with Figure 8 The top end of the sliding cylinder 161 is provided with a first flange 162 extending inward, and the bottom end of the sliding cylinder 161 is provided with a second flange 163 extending outward. When the adjacent sliding cylinders 161 move to the maximum stroke, the first flange 162 and the second flange 163 are in contact to prevent the sliding cylinder 161 from being pulled out of the adjacent sliding cylinder 161.
[0055] The sliding cylinder 161 can be made of a lightweight alloy, such as aluminum alloy or magnesium alloy.
[0056] (Fourth embodiment)
[0057] In combination with Figure 9 The fourth embodiment provides a sleeping platform, which comprises a base 11, a top plate 12, a table body 13, a third rigid chain 23 and a driving device 3. The top plate 12 is used to carry the detected object, the table body 13 is arranged at the lower part of the top plate 12 and is used to support the top plate 12, the top plate 12 and the table body 13 are connected through a first guide mechanism, the first guide mechanism is used to guide the movement of the top plate 12 along the length direction of the table body 13, the base 11 is arranged at the lower part of the table body 13 and is used to support the table body 13, the table body 13 and the base 11 are connected through a second guide mechanism, the second guide mechanism is used to guide the movement of the table body 13 in the vertical direction, the upper end of the third rigid chain 23 is fixedly connected to the top plate 12, the lower end of the third rigid chain 23 is connected to the driving device 3, the third rigid chain 23 located on the base 11 is switched from horizontal movement to vertical movement through the driving device 3, the third rigid chain 23 located below the top plate 12 is switched from vertical movement to horizontal movement through a fourth sprocket 17, a brake is installed on the fourth sprocket 17 and the second guide mechanism, and the driving device 3 cooperates with the brake to make the top plate 12 move vertically and horizontally.
[0058] The fourth embodiment only includes one driving device 3 and one third rigid chain 23, and the links of the third rigid chain 23 must be made of non-metallic non-magnetic materials such as plastic or reinforced fiber materials.
[0059] The following describes the process of performing horizontal movement and vertical movement on the table body 13 and the ceiling 12:
[0060] In the first working condition, the fourth sprocket 17 is braked, the weight of the ceiling 12 and the table body 13 is transmitted to the third rigid chain 23 through the fourth sprocket 17, the second guide mechanism is not braked, at this time, the third rigid chain 23 located below the table body 13 can be retracted or released in the vertical direction, the third rigid chain 23 located above the table body 13 and below the ceiling 12 cannot move in the horizontal direction, when the motor 31 drives the third rigid chain 23 to retract and release, the ceiling 12 and the table body 13 synchronously rise or fall, and the ceiling 12 cannot move horizontally.
[0061] In the second working condition, the fourth sprocket 17 is not braked, the second guide mechanism is braked, the weight of the ceiling 12 and the table body 13 is transmitted to the second guide mechanism through the brake, at this time, the third rigid chain 23 located above and below the table body 13 can be retracted or released, when the motor 31 drives the third rigid chain 23 to retract and release, the table body 13 and the ceiling 12 remain at the current height, and the ceiling 12 moves along the length direction of the table body 13.
[0062] The brake of the fourth sprocket 17 can be a disc brake or a drum brake, and the second guide mechanism can be the scissor arm 15 or the telescopic cylinder group 16, and the brake of the scissor arm 15 and the telescopic cylinder group 16 can be the brake shown in the first embodiment and the third embodiment, such as a disc brake and a brake caliper.
[0063] The following also provides a nuclear magnetic resonance device, which can adopt the bedrest in any one of the above embodiments.
[0064] Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the present application cover any and all variations of the application that come within the scope of the claims and their equivalents. It is intended that the specification and examples be considered exemplary only, with the true scope and spirit of the application indicated by the following claims.
[0065] It is to be understood that the application is not limited to the precise construction here described and as shown in the drawings, and that various modifications and changes can be effected therein by those skilled in the art without departing from the scope of the application. The scope of the application is limited only by the claims appended hereto.
Claims
1. A bed, characterized by Possessing: a top plate for carrying the detected object; a table body arranged at the lower part of the top plate and used for supporting the top plate; a base arranged at the lower part of the table body and used for supporting the table body; a rigid chain with the upper end connected to the top plate and the table body; a driving device for controlling the retraction and release of the lower end of the rigid chain, moving the top plate horizontally, and moving the table body vertically.
2. The bed platform according to claim 1, wherein: the top plate and the table body are connected through a first guide mechanism for guiding the movement of the top plate along the length direction of the table body; the table body and the base are connected through a second guide mechanism for guiding the movement of the table body in the vertical direction.
3. The bed platform according to claim 2, wherein: the second guide mechanism possesses a scissor arm with both ends connected to the table body and the base.
4. The bed platform according to claim 2, wherein: the second guide mechanism possesses a telescopic cylinder group capable of telescoping in the vertical direction, the telescopic cylinder group includes multiple sliding cylinders with gradually changing sizes and closely nested with each other, and the two sliding cylinders at both ends of the telescopic cylinder group are fixedly connected to the table body and the base respectively.
5. The bed platform according to claim 4, wherein: the adjacent sliding cylinders are connected to each other through guide rails, and over-travel stop structures are arranged between the adjacent sliding cylinders.
6. The bed platform according to any one of claims 2-5, wherein: the rigid chain possesses: a first rigid chain with the upper end fixedly connected to the top plate and the lower end connected to the driving device; a second rigid chain with the upper end fixedly connected to the table body and the lower end connected to the driving device.
7. The bed platform according to claim 6, wherein: a third sprocket is arranged on the table body for guiding the turning of the first rigid chain, so that the upper end of the first rigid chain extends vertically upward from the base to the bottom of the top plate and then advances and retreats along the sliding direction of the top plate.
8. The bed platform according to claim 7, wherein: the driving device includes: an electric motor fixedly connected to the base, a first sprocket meshing with the first rigid chain, a second sprocket meshing with the second rigid chain, a first clutch and a second clutch, the first rigid chain and the second rigid chain are respectively in transmission connection with the electric motor through the first clutch and the second clutch, the electric motor outputs torque to the first sprocket and the second sprocket, and at least one of the second sprocket and the second guide mechanism is provided with a brake for limiting the movement of the second sprocket and / or the second guide mechanism.
9. The bed platform according to claim 8, wherein: the first rigid chain and the second rigid chain are arranged side by side.
10. The bed platform according to claim 8, wherein: The first rigid chain is nested inside the second rigid chain, the second rigid chain is provided with second pin shafts and second chain plates, the second chain plates are formed with notches between adjacent two second pin shafts, the first sprocket can axially pass through the notches to engage the first rigid chain, and the first sprocket does not contact the second pin shafts.
11. The bed of any one of claims 2-5, wherein, The rigid chain is provided with a third rigid chain, the lower end of which is arranged on the base and connected to the driving device, and the upper end of which is fixedly connected to the ceiling plate. The base is provided with a fourth sprocket, the lower end of the third rigid chain moves between the horizontal and vertical directions under the guidance of the driving device, the upper end of the third rigid chain moves between the horizontal and vertical directions under the guidance of the fourth sprocket, and the fourth sprocket and the second guide mechanism are both provided with a brake.
12. The bed of claim 1, wherein, The rigid chain is provided with a plurality of chain links and a self-locking mechanism, the chain links are automatically locked under stress and automatically unlocked when released through the self-locking mechanism.
13. A nuclear magnetic resonance device, characterized in that, It is provided with the bed of any one of claims 1-12.