阅读说明：本技术 具有用于病床线缆的绕线机构的磁共振系统 (Magnetic resonance system with wire winding mechanism for hospital bed cable ) 是由 陈宝宏 闫旭 贺增合 于 2019-03-11 设计创作，主要内容包括：本发明提供了一种磁共振系统,包括：系统主体(1),具有患者通道(2)；病床(3),可相对患者通道(2)移动；以及绕线机构(5),绕线机构(5)布置在磁共振系统的系统主体(1)的服务侧,其中,磁共振系统的病床线缆(4)缠绕在绕线机构(5)上,从服务侧进入患者通道(2)并连接到病床(3)上,绕线机构(5)用于在病床(3)朝向服务侧移动时收紧病床线缆(4),在病床(3)朝向患者侧移动时释放病床线缆(4)。由此,能够缩短病床线缆(4)的长度并且更好地收纳病床线缆(4)。(The invention provides a magnetic resonance system comprising: a system body (1) having a patient channel (2); a patient bed (3) which is movable relative to the patient tunnel (2); and the winding mechanism (5), the winding mechanism (5) is arranged at the service side of the system main body (1) of the magnetic resonance system, a sickbed cable (4) of the magnetic resonance system is wound on the winding mechanism (5) and enters the patient passageway (2) from the service side and is connected onto the sickbed (3), and the winding mechanism (5) is used for tightening the sickbed cable (4) when the sickbed (3) moves towards the service side and releasing the sickbed cable (4) when the sickbed (3) moves towards the patient side. Thus, the length of the bed cable (4) can be shortened and the bed cable (4) can be better accommodated.)

1. Magnetic resonance system with a winding mechanism for a bed cable, characterized in that the magnetic resonance system comprises:

a system body (1) having a patient channel (2);

a patient bed (3) movable relative to the patient tunnel (2); and

a wire winding mechanism (5), the wire winding mechanism (5) being arranged on a service side of the system main body (1) of the magnetic resonance system,

wherein a bed cable (4) of the magnetic resonance system is wound on the winding mechanism (5), enters the patient tunnel (2) from the service side and is connected to the bed (3), the winding mechanism (5) is used for tightening the bed cable (4) when the bed (3) moves towards the service side and releasing the bed cable (4) when the bed (3) moves towards the patient side.

2. The magnetic resonance system according to claim 1, wherein the winding mechanism (5) comprises:

a back plate (51), wherein a slide rail (55) extending in the vertical direction is arranged on the back plate (51);

the pulley block comprises a fixed pulley (53) fixedly arranged on the back plate (51) and a movable pulley (52) movably arranged along the sliding rail;

a return device (54) for applying a return force to the movable sheave (52) in a direction away from the fixed sheave (53);

wherein, the sickbed cable (4) is wound on the pulley block.

3. The magnetic resonance system according to claim 2, wherein the pulley block includes a plurality of the fixed pulleys (53) and a plurality of the movable pulleys (52), the movable pulleys (52) are disposed at positions lower than the fixed pulleys (53), and the bed cable (4) is first passed under a first one of the movable pulleys (53), then sequentially passed over subsequent ones of the fixed pulleys (53) and the movable pulleys (52), and finally connected to the system main body (1).

4. The system according to claim 2, wherein the return means (54) comprises a spring having one end connected to the movable sheave (52) and the other end fixed to the back plate (51) above the movable sheave (52), and the spring is in a compressed state.

5. The magnetic resonance system according to claim 2, characterized in that the resetting means (54) comprises:

a slide plate (56) fixedly provided on the movable sheave (52);

a gravity block (543) disposed on the slide plate (56).

6. The MR system according to claim 5, wherein the sled (56) is constructed as a single piece so that all of the movable sheaves (52) slide together.

7. The MR system according to claim 5, wherein the resetting means (54) includes a plurality of the sliding plates (56) so that the movable sheaves (52) can be independently slid.

8. The magnetic resonance system according to claim 3, wherein the plurality of fixed sheaves (53) and the plurality of movable sheaves (52) are sheaves having different specifications, respectively.

9. The magnetic resonance system according to claim 1, wherein the winding mechanism (5) comprises:

the pulley block comprises a fixed pulley (61) which is fixedly arranged and a movable pulley (62) which is movably arranged;

the movable pulley (62) is connected with the rodless cylinder (63) and moves under the action of the rodless cylinder;

wherein the bed cable (4) is connected to the system main body (1) via a plurality of the fixed pulleys (61) and the movable pulleys (62).

10. The magnetic resonance system according to claim 9, wherein the rodless cylinder (63) includes:

a cylinder block;

a piston (630) dividing the cylinder into a first chamber (632) and a second chamber (633);

a slider (631), the slider (631) being provided on the piston (630) and sliding with the piston (630), the movable sheave (62) being provided on the slider (631);

wherein the bed cable (4) is connected to the system main body (1) by passing around the movable pulley (634), wherein the pressure in the first chamber (632) is greater than the pressure in the second chamber (633) to apply a pulling force to the bed cable (4).

11. The magnetic resonance system according to claim 1, wherein the winding mechanism (5) comprises:

a first pulley block including a plurality of first fixed pulleys (71) and a first movable pulley (72), the bed cable (4) being fixed to the system main body (1) via the fixed pulleys (71) around the first movable pulley (72);

a second pulley block comprising a plurality of second fixed pulleys (75) and a second movable pulley (73), said second movable pulley (73) being connected to said first movable pulley (72);

one end of the pulling wire (74) is connected to the tail end of the sickbed (3) close to the feet of the patient, and the other end of the pulling wire (74) is fixed after bypassing the second movable pulley (73) through the second fixed pulleys (71).

12. The magnetic resonance system according to claim 1, wherein the winding mechanism (5) comprises:

-a winding device (82) located at the service side of the system body (1);

a drag chain (81) having one end connected to the patient bed 3 and the other end connected to the winding device (82), wherein the winding device (82) automatically winds the drag chain (81);

wherein the bed cable (4) extends through the drag chain (81) and is connected to the system main body (1).

13. The magnetic resonance system according to claim 12, wherein the winding device (82) includes:

a support;

the winding drum is rotatably arranged on the bracket, and the drag chain (81) is wound on the winding drum;

the elastic piece is connected to the winding drum and drives the winding drum to rotate so as to release or tighten the sickbed cable (4).

14. The system of claim 13, wherein the elastic member is a spring or a non-metallic elastic cord.

15. The system according to claim 1, further comprising a housing for protecting the winding mechanism (5).

Technical Field

The invention relates to the field of magnetic resonance equipment, in particular to a magnetic resonance system with a winding mechanism for a sickbed cable.

Background

Competition in the magnetic resonance market is becoming more and more intense worldwide, especially in china. Magnetic resonance systems with high performance and low price must contribute to their sales. As an important functional unit, the performance of the radio frequency components is important to the imaging quality, so the stability of the radio frequency components is significant to the imaging quality and the operation of the magnetic resonance system can be more stable.

The application of local coils in a patient bed is essential for a patient lying on the patient bed. When receiving signals from the body of a patient, the local coil needs to transmit complex signals to the signal receiver through a cable, and then transmit data converted from the signals to the image reconstruction center. Since the patient's body moves with the bed, the local coil cables also need to move relative to the magnetic resonance scanner.

Figure 1 shows a schematic representation of a prior art magnetic resonance system. A prior art magnetic resonance system comprises a system body 1, in which system body 1 a patient tunnel 2 is provided for the passage of a patient and a patient bed 3. Shown here is the patient bed 3 and the situation in which the patient has completely entered the patient tunnel 2 for examination. At this time, a part of the bed cable 4 connected to the head end of the bed 3 is connected to the patient path 2, and the remaining part is connected to the system main body 1 outside the patient path 2. In order to reduce signal interference and ensure imaging quality, a plurality of radio frequency chokes are arranged on the sickbed cable 4 section by section to eliminate external interference. Due to the presence of the rf choke, the bed cable 4 needs to be wound up to be realized, so the bed cable 4 is very long, typically up to 15 meters. Whereas the part of the bed cable 4 in the patient tunnel 2 is subject to the greatest possible interference from the outside world, a plurality of radio frequency chokes are provided. In other cases where more rf receive channels are required, more rf chokes must be provided.

The moving cables need to be handled or protected well, otherwise the cables may get stuck in the patient path and get blocked so that the bed cannot move. Existing cable handling solutions are often expensive or bulky in size due to the stiffness of the cable and the complex internal structure.

Disclosure of Invention

The invention mainly aims to provide a winding mechanism suitable for a sickbed of a magnetic resonance system, and aims to solve the problems that cables of the sickbed are too long and are difficult to store in the prior art.

To achieve the above object, a magnetic resonance system is provided according to an aspect of the present invention. The magnetic resonance system includes: a system body having a patient passageway; a patient bed movable relative to the patient path; and the winding mechanism is arranged on the service side of the system main body of the magnetic resonance system, a sickbed cable of the magnetic resonance system is wound on the winding mechanism and enters the patient passage from the service side and is connected onto a sickbed, and the winding mechanism is used for tightening the sickbed cable when the sickbed moves towards the service side and releasing the sickbed cable when the sickbed moves towards the patient side.

In this way, the bed cable is always in a taut state. The patient side is the side opposite to the side on which the patient bed is located, i.e. the patient side. When the sick bed cable moves from the patient side to the service side along with the sick bed, redundant sick bed cables are stored by the wire winding mechanism, and the sick bed cable is prevented from being clamped between the sick bed and the patient channel. By having the bed cables connected to the system body on the service side rather than the patient side as in the prior art, the required length of the bed cables is reduced, avoiding redundant scattering of the bed cables around the system.

According to an exemplary embodiment of the present invention, a wire winding mechanism includes: the back plate is provided with a slide rail extending along the vertical direction; the pulley block comprises a fixed pulley fixedly arranged on the back plate and a movable pulley movably arranged along the sliding rail; a return device for applying a return force to the movable sheave in a direction away from the fixed sheave; wherein, the sick bed cable twines on the assembly pulley.

In this way, the housing of the bed cable can be achieved by a simple pulley arrangement.

According to an exemplary embodiment of the present invention, the pulley block includes a plurality of fixed pulleys and a plurality of movable pulleys, the movable pulleys are disposed at a position lower than the fixed pulleys, and the bed cable is first passed under a first movable pulley, then sequentially passed over subsequent fixed pulleys and movable pulleys, and finally connected to the system main body.

The bed cable is guided to first pass under the first movable pulley and then extend upward over the adjacent fixed pulley, after which the bed cable is alternately passed over the movable and fixed pulleys in this manner in turn. Finally, the sickbed cable passes below the last movable pulley, extends upwards and is fixedly connected to the system main body. When the sickbed moves from the side of the patient to the service side, the sickbed cable moves downwards due to gravity, the force of the sickbed cable below the movable pulley is reduced, and the sickbed cable moves downwards along the sliding rail under the action of the reset device. The part of the bed cable between the pulleys grows correspondingly. From this, realized accomodating to the sick bed cable.

According to an exemplary embodiment of the present invention, the return means includes a spring having one end connected to the movable sheave and the other end fixed to the back plate above the movable sheave, and the spring is in a compressed state.

In this way, when the bed is moved from the patient side to the service side, the spring in a compressed state presses the movable sheave downward along the slide rail to achieve the storing function.

According to an exemplary embodiment of the present invention, a reset apparatus includes: a slide plate fixedly provided on the movable sheave; the gravity block is arranged on the sliding plate.

In this way, when the bed moves from the patient side to the service side, the gravity block moves the movable pulley downward along the slide rail by its own gravity to realize the storage function.

According to an exemplary embodiment of the present invention, the slide plate is constructed in one body such that all the movable pulleys slide together.

In this way, by constructing the slide plate as one body, the gravity of the gravity block can be uniformly distributed on the slide plate, and the slide plate can move in the slide rail more smoothly.

According to an exemplary embodiment of the present invention, the returning means includes a plurality of sliding plates so that the movable pulleys can be independently slid.

In this way, the resetting device can be adapted to a plurality of different tension situations.

According to an exemplary embodiment of the present invention, the plurality of fixed sheaves and the plurality of movable sheaves are sheaves having different specification and size, respectively.

In this way, the design of the winding device can be made more flexible.

According to an exemplary embodiment of the present invention, a wire winding mechanism includes: the pulley block comprises a fixed pulley which is fixedly arranged and a movable pulley which is movably arranged; the movable pulley is connected with the rodless cylinder and moves under the action of the rodless cylinder; wherein the bed cable is connected to the system main body via a plurality of fixed pulleys and movable pulleys.

In this way, the wire winding mechanism can be constructed more compactly by using the rodless cylinder.

According to an exemplary embodiment of the present invention, a rodless cylinder includes: a cylinder block; a piston dividing the cylinder into a first chamber and a second chamber; the sliding block is arranged on the piston and slides along with the piston, and the movable pulley is arranged on the sliding block; wherein the bed cable is routed around the movable pulley to the system body, wherein the pressure in the first chamber is greater than the pressure in the second chamber to apply a pulling force to the bed cable.

In this way, the bed cable is passed around the movable pulley via the guide pulley. When the sickbed is static, the force of the sickbed cable acting on the movable pulley is balanced with the force of the piston acting on the sliding block, when the sickbed moves from the side of a patient to the service side, the acting force of the sickbed cable is smaller than that of the piston, and the sickbed cable is pulled to the side of the patient by the movable pulley, so that redundant sickbed cables are stored.

According to an exemplary embodiment of the present invention, a wire winding mechanism includes: a first pulley block including a plurality of first fixed pulleys and a first movable pulley, the bed cable being fixed to the system main body via the fixed pulleys around the first movable pulley; the second pulley block comprises a plurality of second fixed pulleys and a second movable pulley and is connected with the first movable pulley; and one end of the pull wire is connected to the tail end of the sickbed close to the feet of the patient, and the other end of the pull wire is wound around the second movable pulley through the second fixed pulleys and then is fixed.

In this way, a rodless cylinder is eliminated and the winding mechanism is further simplified. When the sickbed is stationary, the force exerted on the first movable pulley by the sickbed cable is balanced with the force exerted on the second movable pulley. Accordingly, the force exerted on the second movable sheave by the wire is balanced with the force exerted on the first movable sheave. When the bed moves from the patient side to the service side, the force of the bed cable is smaller than the force of the second movable pulley, so that the first movable pulley pulls the bed cable to the patient side, and the force of the pull wire is larger than the force of the first movable pulley, so that the second movable pulley is pulled to the patient side and is kept synchronous with the movement of the first movable pulley. Thereby accommodating the redundant hospital bed cables.

According to an exemplary embodiment of the present invention, a wire winding mechanism includes: a winding device located at the service side of the system main body; one end of the drag chain is connected to the head end of the bed, the other end of the drag chain is connected to the winding device, and the winding device automatically winds the drag chain; wherein, the sickbed cable passes through the drag chain to extend and is connected to the system main body.

In such a way, when the sickbed moves, the drag chain moves along with the sickbed, the winding device automatically winds up the redundant drag chain, and then the sickbed cable in the drag chain is tightened, so that the sickbed cable is stored.

According to an exemplary embodiment of the present invention, a winding device includes: a support; the winding drum is rotatably arranged on the bracket, and the drag chain is wound on the winding drum; and the elastic piece is connected to the winding drum and drives the winding drum to rotate so as to release or tighten the sickbed cable.

In this way, as the bed moves from the service side towards the patient side, the drum rotates correspondingly to release the drag chain. The elastic piece is pre-stressed along with the rotation of the winding drum, and the drag chain cannot be released too fast through the pre-stress. When the sickbed moves from the patient side to the service side, the pulling force of the towing chain received by the winding drum is reduced, and the winding drum rotates through the pretightening force of the elastic piece to tighten the towing chain.

In addition, not only can the sick bed cable set up in the tow chain, other cables also can set up in order to realize accomodating the function in the tow chain together.

According to an exemplary embodiment of the invention, the elastic member is a spring or a non-metallic elastic cord.

In this way, the elastic member can be made simple in construction and low in cost.

According to an exemplary embodiment of the present invention, a case for protecting the wire winding mechanism is further included.

In this way, the winding mechanism can be protected from the outside with the housing and the magnetic resonance system can be made more compact.

In the embodiment of the invention, a magnetic resonance system is provided to solve the problems that a sickbed cable is too long and is not easy to store in the prior art, and the technical effect of remarkably shortening the sickbed cable to greatly reduce the cost is achieved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

figure 1 shows a schematic diagram of a prior art magnetic resonance system;

figure 2 shows a schematic view of an embodiment of a magnetic resonance system according to the invention;

figure 3 shows a service-side view of a first embodiment of a magnetic resonance system according to the invention;

FIG. 4 shows a schematic diagram of a variant of the embodiment shown in FIG. 3;

figures 5a, 5b show schematic views of a second embodiment of a magnetic resonance system according to the invention when the patient bed does not enter the patient tunnel;

figures 6a, 6b show schematic views of a second embodiment of a magnetic resonance system according to the invention with the patient bed fully entering the patient tunnel;

figure 7 shows a schematic view of a variant of the second embodiment of the magnetic resonance system according to the invention;

figure 8 shows a schematic view of a third embodiment of a magnetic resonance system according to the invention;

figure 9 shows a schematic view of a fourth embodiment of a magnetic resonance system according to the invention; and

figure 10 shows a schematic view of a fifth embodiment of a magnetic resonance system according to the invention.

Wherein the figures include the following reference numerals:

1: a system main body;

2: a patient passageway;

3: a hospital bed;

30 sickbed supporting table

31 supporting table frame

4: a bed cable;

40: a radio frequency choke;

5: a winding mechanism;

51: a back plate;

52. 62, 72, 73: a movable sheave;

53. 61, 71, 75: fixing the pulley;

54: a resetting device;

543: a gravity block;

55: a slide rail;

56: a slide plate;

63: a rodless cylinder;

630: a piston;

631: a slider;

632: a first chamber;

633: a second chamber;

74: and pulling a wire.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

It is to be noted that, unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

In the present invention, unless specified to the contrary, use of the terms of orientation such as "upper, lower, top, bottom" or the like, generally refer to the orientation as shown in the drawings, or to the component itself in a vertical, perpendicular, or gravitational orientation; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the invention.

For the sake of simplicity, other conventional components of the magnetic resonance system, such as a patient table, guide rollers for guiding the movement of the patient table in the patient tunnel, etc., are not shown.

Figure 2 shows a schematic view of an embodiment of a magnetic resonance system according to the invention. In fig. 2, the magnetic resonance system includes: a system body 1 having a patient passageway 2; a patient bed 3 which is movable relative to the patient tunnel 2; and a winding mechanism 5. The winding mechanism 5 is disposed on the service side of the system main body 1 of the magnetic resonance system. The bed cable 4 of the magnetic resonance system is wound on a winding mechanism 5 and subsequently enters the patient tunnel 2 from the service side and is connected to the bed 3. The winding mechanism 5 is used to tighten the bed cable 4 when the bed 3 is moved toward the service side and to release the bed cable 4 when the bed 3 is moved toward the patient side.

In this way, the bed cable 4 is always in a taut state. Here, the service side is the side opposite to the side where the patient bed is located, i.e., the patient side. When the sickbed cable 4 moves from the patient side to the service side along with the sickbed, the redundant sickbed cable 4 is stored by the wire winding mechanism 5, and the sickbed cable 4 is prevented from being clamped between the sickbed 3 and the patient passage 2. Thereby, the required length of the bed cable 4 is shortened and the bed cable 4 is prevented from being scattered around the system redundantly.

And is shown here as the "worst case" case when scanning the head of a patient. In operation of the system, the portion of the patient bed cable 4 in the patient tunnel 2 is the longest, but only a maximum of 2 rf chokes are arranged to suppress external interference.

Figure 3 shows a service-side view of a first embodiment of a magnetic resonance system according to the invention. The winding mechanism 5 shown here includes: a back plate 51 provided with slide rails (not shown) extending in a vertical direction at the back plate 51; a pulley block comprising a fixed pulley 53 fixedly arranged on the back plate 51 and a movable pulley 52 movably arranged along the slide rail; a return device 54 for applying a return force to the movable sheave 52 in a direction away from the fixed sheave 53; finally, the sickbed cable 4 is wound on the pulley block. In this embodiment, the return means 54 includes a spring having one end connected to the movable sheave 52 and the other end fixed to the back plate 51 above the movable sheave 52, and the spring is in a compressed state.

In the first embodiment of the magnetic resonance system according to the present invention, the pulley block includes a plurality of fixed pulleys 53 and a plurality of movable pulleys 52, the movable pulleys 52 are disposed at positions lower than the fixed pulleys 53, and the bed cable 4 is first passed under the first movable pulley 52, then sequentially passed over the subsequent fixed pulleys 53 and movable pulleys 53, and finally connected to the system main body 1. Here, the number of the fixed sheave 53 and the movable sheave 52 can be selected according to the length of the bed cable 4.

When the bed 3 moves from the patient side to the service side, the bed cable 4 moves downward due to gravity, and the force of the bed cable 4 is reduced below the movable pulley 52 and moves downward along the slide rail under the action of the spring. The part of the bed cable 4 between the pulleys grows correspondingly. From this, realized accomodating to the sick bed cable.

Fig. 4 shows a schematic illustration of a variant of the embodiment shown in fig. 3. Here, the difference from the embodiment in fig. 3 is that each of the plurality of fixed sheaves 53 and the plurality of movable sheaves 52 is a sheave having a different specification and size. Therefore, the design of the winding device can be more flexible.

Fig. 5a, 5b show a schematic representation of a second embodiment of a magnetic resonance system according to the invention when the patient bed does not enter the patient tunnel. In this embodiment, the winding mechanism 5 differs from the first embodiment shown in fig. 3 in the return means. The resetting device 54 of the second embodiment of the magnetic resonance system according to the invention comprises: a slide plate 56, the slide plate 56 being fixedly provided on the movable sheave; and a gravity block 543 arranged on the slide plate 56.

Preferably, in this embodiment, the slide plate 56 is constructed in one piece such that all of the movable sheaves 52 slide together.

When the hospital bed moves from the patient side to the service side, the gravity block 543 moves the movable pulley 52 downward along the slide rail 55 by its own gravity to realize the housing function. In this way, by configuring the slide 56 as a single body, the gravity of the gravity block 543 can be uniformly distributed on the slide, thereby making the movement of the slide 56 in the slide rail 55 smoother.

As shown in fig. 5a, the patient bed 3 is not now inserted into the patient tunnel 2 on the patient side. Here, the bed cable 4 is guided into the housing 10 of the system main body 1 via pulleys, and wound on the winding mechanism 5. Fig. 5b shows a winding mechanism 5 corresponding to the situation in fig. 5 a. Here, the movable sheave 52 is pulled by the bed cable 4 and slides to the upper portion of the back plate 51 near the fixed sheave 53. Shown here is the situation in which the wire winding mechanism 5 releases the bed cable 4.

Accordingly, fig. 6a, 6b show a schematic representation of a second embodiment of a magnetic resonance system according to the invention with a patient bed 3 completely entering the patient tunnel 2. As shown in fig. 6a, the patient bed 3 now extends partly into the patient tunnel 2 and partly out of the patient tunnel 2. Here, the bed cable 4 is guided into the housing 10 of the system main body 1 via pulleys, and wound on the winding mechanism 5. Fig. 6b shows a winding mechanism 5 corresponding to the situation in fig. 6 a. Here, the movable sheave 52 is reduced in tension by the bed cable 4 and slides to the lower part of the back plate 51. Shown here is the situation where the wire winding mechanism 5 tightens the bed cable 4.

Fig. 7 shows a schematic representation of a variant of the second embodiment of the magnetic resonance system according to the invention. Here, the returning device 54 includes a plurality of sliding plates 56 so that the movable sheave 52 can slide independently. Thus, the resetting device can adapt to various different tension conditions.

Figure 8 shows a schematic representation of a third embodiment of a magnetic resonance system according to the invention. In this embodiment, the winding mechanism 5 includes: the pulley block comprises a fixed pulley 61 fixedly arranged and a movable pulley 62 movably arranged; a rodless cylinder 62, wherein the movable pulley 62 is connected with the rodless cylinder 63 and moves under the action of the rodless cylinder; wherein the bed cable 4 is connected to the system main body 1 via a plurality of fixed pulleys 61 and a movable pulley 62. Here, the rodless cylinder is a non-magnetic mechanical cylinder, which can reduce the influence on the magnetic field in the system main body.

In this third embodiment, the rodless cylinder 63 includes: a cylinder block; a piston 630 dividing the cylinder into a first chamber 632 and a second chamber 633; a slider 631, the slider 631 being provided on the piston 630 and sliding with the piston 630, the movable sheave 62 being provided on the slider 631; wherein the bed cable 4 is connected to the system main body 1 around the movable pulley 634, wherein the pressure in the first chamber 632 is greater than the pressure in the second chamber 633 to apply a pulling force to the bed cable 4.

In this way, the bed cable 4 is passed around the movable pulley 62 via the fixed pulley 61. When the sickbed 2 is static, the force of the sickbed cable 4 acting on the movable pulley 62 is balanced with the force of the piston 630 acting on the slide block 631, when the sickbed 3 moves from the patient side to the service side, the acting force of the sickbed cable 4 is smaller than that of the piston 630, the sickbed cable 4 is pulled to the patient side by the movable pulley 62, and therefore the sickbed cable 4 is tightened. When the sickbed 3 moves from the service side to the patient side, the acting force of the sickbed cable 4 is larger than that of the piston 630, and the sickbed cable 4 is pulled to the service side by the movable pulley 62, so that the sickbed cable 4 is released. Here, the first chamber 632 and the second chamber 633 may be further connected to an expansion chamber having a discharge valve.

Figure 9 shows a schematic representation of a fourth embodiment of a magnetic resonance system according to the invention. The winding mechanism 5 includes: a first pulley block including a plurality of first fixed pulleys 71 and a first movable pulley 72, the bed cable 4 being fixed to the system main body 1 via the fixed pulleys 71 around the first movable pulley 72; a second pulley block comprising a plurality of second fixed pulleys 75 and a second movable pulley 73, connected to the first movable pulley 72; and a pulling wire 74, one end of the pulling wire 74 is connected to the tail end of the sickbed 3 close to the feet of the patient, and the other end of the pulling wire 74 is fixed after passing through the plurality of second fixed pulleys 71 and bypassing the second movable pulley 73. Also shown in the figure is the bed support 30, a plurality of second fixed pulleys 75 of a second pulley set are fixed to the bed support 30, and a pull wire 74 is fixed to the support frame 31.

In this way, the rodless cylinder is eliminated and the winding mechanism 5 is further simplified. When the bed 3 is stationary, the force exerted by the bed cable 4 on the first movable pulley 72 is balanced with the force of the second movable pulley 73. Accordingly, the force exerted on second movable sheave 73 by wire 74 balances the force of first movable sheave 72. When the bed 3 moves from the patient side to the service side, the urging force of the bed cable 4 is smaller than the urging force of the second movable pulley 73, so that the first movable pulley 72 pulls the bed cable 4 to the patient side, and the urging force of the wire 74 is larger than the urging force of the first movable pulley 72, so that the second movable pulley 73 is pulled to the patient side and is kept in synchronization with the movement of the first movable pulley 72. Thereby realizing the tightening of the sickbed cable 4.

When the bed 3 moves from the service side toward the patient side, the urging force of the bed cable 4 is larger than the urging force of the second movable sheave 73, so that the first movable sheave 72 pulls the bed cable 4 toward the service side, and the urging force of the wire 74 is smaller than the urging force of the first movable sheave 72, so that the second movable sheave 73 is pulled toward the service side and is kept in synchronization with the movement of the first movable sheave 72. Thereby enabling the release of the bed cable 4.

Figure 10 shows a schematic view of a fifth embodiment of a magnetic resonance system according to the invention. Here, the winding mechanism 5 includes: a winding device 82 located on the service side of the system main body 1; a drag chain 81 having one end connected to the head end and the other end connected to the winding device 82, and the winding device 82 automatically winding the drag chain 81; wherein the bed cable 4 extends through the drag chain 81 and is connected to the system main body 1.

In this way, when the patient bed 3 moves from the patient side to the service side, the tow chain 81 moves together with the patient bed 3, and the winding device 82 automatically winds up the redundant tow chain 81, so as to tighten the bed cable 4 in the tow chain 81, thereby tightening the bed cable. Accordingly, when the patient bed 3 moves from the service side toward the patient side, the tow chain 81 moves together with the patient bed 3, and the winding device 82 releases the tow chain 81 to be wound so that the tow chain 81 moves synchronously with the patient bed 3, and further releases the patient bed cable 4 in the tow chain 81, thereby releasing the patient bed cable 4.

In this fifth embodiment, the winding device 82 includes: a support; a spool rotatably provided on the bracket, on which the tow chain 81 is wound; and the elastic element is connected to the winding drum and drives the winding drum to rotate so as to release or tighten the sickbed cable 4.

In this way, when the patient bed 3 is moved from the service side towards the patient side, the reel performs a corresponding rotation to release the drag chain 81. The elastic piece is pre-stressed along with the rotation of the winding drum, and the drag chain cannot be released too fast due to the pre-stress. When the patient's bed 3 is moved from the patient side to the service side, the reel is subjected to a reduction in the tension of the drag chain and is rotated by the pretension of the elastic member to tighten the drag chain 81.

Preferably, the elastic member is a spring or a non-metallic elastic cord. Thus, the structure of the elastic member can be simplified and the cost can be reduced.

In addition, not only can the sick bed cable set up in the tow chain, other cables also can set up in order to realize accomodating the function in the tow chain together.

Preferably, the magnetic resonance system further comprises a housing for protecting the winding mechanism 5.

In this way, the winding mechanism 5 can be protected from the outside with the housing and the magnetic resonance system can be made more compact.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

1. the length of the cable of the sickbed is shortened;

2. the cable of the sickbed is prevented from being clamped between the sickbed and the patient channel;

3. the number of radio frequency chokes for the cables of the hospital bed is significantly reduced, and the cost is greatly reduced.

It is to be understood that the above-described embodiments are only a few, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein.

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