A magnetic resonance imaging auxiliary device for hand function

Abstract

The present invention discloses a magnetic resonance hand function imaging auxiliary device, comprising a fixed frame of an annular structure, wherein a plurality of main action ropes are sequentially installed on the inner wall surface of the fixed frame, wherein a series assembly is installed in the middle of the plurality of main action ropes near the center of the fixed frame, and a central elastic ring is installed at the other end of the plurality of series assembly. Through the interconnection of the various structures, a rope body network structure in which the rope bodies are perpendicular to each other is formed, and the principle that the vertical direction of the tightened rope body is easy to undergo damping deformation is utilized, and during the process of the patient's reciprocating finger clenching and opening, the plurality of main action ropes and a central elastic ring respectively provide slight resistance stimulation to the patient's fingers, and the weak resistance will continue to provide resistance stimulation to the patient's fingers in a moving state, and transmit and radiate the movement stimulation of the hand to different brain nerve areas of the patient, so as to more accurately confirm whether the lesion of the patient with nerve damage invades the hand movement function area, thereby achieving the purpose of accurate diagnosis.

Description

Technical Field

[0001] The present invention relates to the technical field of limb auxiliary training, and more specifically, to a magnetic resonance hand function imaging auxiliary device. Background Art

[0002] Magnetic resonance imaging (MRI) has become a common imaging examination method. As a new imaging examination technology, MRI has no ionizing radiation and will not harm the human body. For patients with nerve damage, MRI is the most effective imaging diagnostic method for the brain. MRI can be used to examine the brainstem, ventricles, cerebral cortex and other structures related to cranial nerves. MRI can be used for patients with nerve damage or epilepsy to check whether the scope of nerve damage has invaded the motor cortex, so as to confirm whether there is a problem with the motor center. Since human fingers correspond to different brain nerve areas, such as: prefrontal lobe, posterior frontal lobe, mental function area and thinking function area, etc., when performing MRI examinations on patients with nerve damage or epilepsy, doctors usually instruct patients to autonomously control the entire palm and fingers to clench and open reciprocally during the examination, so as to radiate to different brain nerve areas through hand movement stimulation, so as to confirm whether the lesions of patients with nerve damage have invaded the hand motor function area.

[0003] Currently, when patients with nerve damage or epilepsy control their palms autonomously to accurately detect brain nerve areas, they cannot achieve effective motor stimulation because they have poor controllability over their own hand movements and need assistance from family members or medical staff. As a result, the radiation effect of hand movement stimulation on different brain nerve areas is limited, which means that when doctors observe the patient's brain nerve area, there are still some shadows. Therefore, there is still room for improvement in the current detection effect. Summary of the invention

[0004] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a magnetic resonance hand function imaging auxiliary device, which provides a plurality of main action ropes, compensation ropes, auxiliary ropes, series components and a central elastic ring. When the patient reciprocates in clenching and opening his fist, the plurality of main action ropes and a central elastic ring respectively provide a slight resistance stimulation to the patient's fingers. The slight resistance will continue to provide resistance stimulation to the patient's fingers in a state of movement, and transmit and radiate the hand movement stimulation to different brain nerve areas of the patient, thereby activating different nerve areas of the patient, so as to more accurately confirm whether the lesions of the patient with nerve damage invade the hand motor function area, provide a more accurate reference basis for the inspection process, thereby achieving the purpose of accurate inspection, and solving the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: a magnetic resonance hand function imaging auxiliary device, comprising a fixed frame, the fixed frame is annular in structure as a whole, a plurality of main action ropes are sequentially installed on the inner wall surface of the fixed frame, a plurality of main action ropes are vertically installed with series components in the middle of one side close to the center of the fixed frame, and a central elastic ring is commonly installed at the other end of the plurality of series components; the series connection direction of each component in the series components is respectively perpendicular to the curved surface tangent of the connecting part of the adjacent main action rope and the central elastic ring, thereby forming a relatively vertical rope network structure of each rope body;

[0006] The series assembly includes a connecting rope I, one end of which is fixed to the central elastic ring and maintained in a vertical state with the tangent of the curved surface at the connection position, the other end of which is fixedly installed with a fixing ring, and the other end of which is fixedly installed with a connecting rope II, a plurality of arc-shaped plates are evenly spaced and arranged on the inner side of the central elastic ring, and the inner side of the central elastic ring is fixedly connected to the two ends of the plurality of arc-shaped plates, and the extension direction of the connecting rope I points to the middle position of the arc-shaped plate; the inner surface curvature of the arc-shaped plate is consistent with that of the central elastic ring, and the two ends of the arc-shaped plate are arranged in semicircular shape;

[0007] The other end of the connecting rope II is fixed to the surface of the main action rope, and the two are distributed in a vertical state. An arc-shaped bracket is fixed to the inner side of the main action rope, and the inner side of the main action rope is fixedly connected to the two ends of the arc-shaped bracket. The extension direction of the connecting rope II points to the middle of the arc-shaped bracket.

[0008] The curved surface tangents of the connecting portion of the rope body of the connecting rope II and the main action rope are perpendicular to each other, and the overall curvature of the arc-shaped bracket is consistent with the curvature of one side of the main action rope. The left and right ends of the arc-shaped bracket are respectively provided with inclined surfaces, and the side ends of the inclined surfaces are fixedly installed with arc-shaped heads. The overall length of the arc-shaped bracket is ≥ half of the overall length of the main action rope, and the overall arc-shaped head is a semicircular arc structure;

[0009] An auxiliary rope is fixedly installed on one side of the inner wall of the fixing frame, a ring is fixedly installed in the middle of the auxiliary rope, a compensation rope is slidably penetrated inside the ring, and in the initial state of the auxiliary rope, the ring and the compensation rope, the ring is located in the middle of the compensation rope and is perpendicular to the compensation rope as a whole;

[0010] The main action rope, the central elastic ring, the connecting rope I, the connecting rope II, the auxiliary rope and the compensating rope are all in a taut state, and the connecting rope I and the connecting rope II are located on the same horizontal line after being taut;

[0011] The main action rope and the auxiliary rope are arc-shaped after being tightened, the connecting rope I and the connecting rope II are both straight-line-shaped after being tightened, and the compensation rope is V-shaped after being tightened. The left and right ends of the compensation rope are respectively fixed to the outer middle position of the nearest fixing ring.

[0012] In a preferred embodiment, the main action rope, central elastic ring, connecting rope I, connecting rope II, auxiliary rope and compensation rope are all made of high elastic materials, the fixing ring and the fixing frame are made of non-elastic materials as a whole, and a circle of rubber pad is evenly pasted on the inner wall of the fixing ring. The thickness of the arc-shaped head gradually decreases from one end away from the inclined surface to the other end, and the thickness reaches the minimum value at the position in contact with the inclined surface. The inclined surface and the arc-shaped head are seamlessly connected, the cross-sectional diameter of the central elastic ring is greater than the thickness of the arc plate, and the cross-sectional diameter of the main action rope is greater than the thickness of the arc bracket.

[0013] In a preferred embodiment, a circular hole matching with the connecting rope II is opened in the middle of the main action rope, and the connecting rope II is fixed to the main action rope through the circular hole.

[0014] In a preferred embodiment, the elastic force ratio of the auxiliary rope to the main action rope is 1:3.

[0015] In a preferred embodiment, the centers of the fixing rings at the head and tail ends of the plurality of fixing rings are located on the same horizontal line, and have both a horizontal spacing and a vertical spacing with the center of the central elastic ring.

[0016] In a preferred embodiment, the arc range of the auxiliary rope is greater than the arc range of the main action rope, and the plurality of main action ropes and the auxiliary ropes are located on the same horizontal plane.

[0017] Technical effects and advantages of the present invention:

[0018] The present invention sets a plurality of main action ropes, compensation ropes, auxiliary ropes, series components and a central elastic ring, utilizes the above structures to be interconnected, and forms a rope network structure in which each rope body is perpendicular to each other. Utilizing the principle that the vertical direction of the tightened rope body is easy to undergo damping deformation, the present invention uses a plurality of main action ropes and a central elastic ring to respectively provide slight resistance stimulation to the patient's fingers during the process of the patient's reciprocating fist clenching and opening. The slight resistance will continue to provide resistance stimulation to the patient's fingers in a moving state, and transmit and radiate the movement stimulation of the hand to different brain nerve areas of the patient, thereby activating different nerve function areas of the patient, thereby more accurately confirming whether the lesion of the patient with nerve damage has invaded the hand movement function area, providing a more accurate and intuitive reference basis for the doctor's examination process, thereby achieving the purpose of accurate diagnosis;

[0019] And in the process of patient's finger movement, the auxiliary rope between the fixing rings where the little finger and thumb are fixed will change in length as the force between the little finger and the thumb is uneven, that is, the auxiliary rope will slide left and right inside the ring, so as to change the length of the auxiliary rope on both sides of the ring, thereby connecting the little finger and the thumb during the movement, and then balancing the problem of uneven force on the fixing frame caused by the large distance between the two. In addition, during the sliding process of the auxiliary rope, the compensation rope fixed on the ring and one side of it can be continuously acted on. The change of the auxiliary rope will affect the compensation rope to continue to stretch toward the center or shrink and recover outward, thereby further balancing the force direction of the peripheral fixing frame and ensuring the stability of its overall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the side three-dimensional structure of the present invention;

[0022] Figure 3 It is a schematic diagram of a partial three-dimensional structure of the present invention;

[0023] Figure 4 It is a schematic diagram of the top view structure of the present invention;

[0024] Figure 5 It is a schematic diagram of the local structure of the present invention;

[0025] Figure 6 It is a partial enlarged structural schematic diagram of the central elastic ring of the present invention;

[0026] Figure 7 It is a schematic diagram of the motion state of the main action rope of the present invention;

[0027] Figure 8 It is a schematic diagram of the state of the structure of the present invention when the patient's palm is clenched into a fist;

[0028] Fig. 9 It is a schematic diagram of the state of the structure of the present invention when the patient's palm is centrifugally opened;

[0029] Fig.10 This is a structural diagram of embodiment 2 of the present invention.

[0030] The accompanying drawings are marked as follows: 1. fixed frame; 2. main action rope; 3. series assembly; 4. central elastic ring; 5. through hole; 6. auxiliary rope; 7. ring; 8. compensation rope; 31. connecting rope I; 32. fixed ring; 33. connecting rope II; 34. arc plate; 35. arc bracket; 36. inclined surface; 37. arc head. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example 1

[0032] As attached Figure 1 To Attachment Fig. 9 The device shown is a magnetic resonance hand-function imaging auxiliary device, comprising a fixed frame 1, wherein the fixed frame 1 is annular in structure as a whole, and the design of the annular structure is more convenient for patients to use, so that it conforms to the range of motion of the patient's palm, and the inner wall surface of the fixed frame 1 is sequentially installed with a plurality of main action ropes 2, and the middle part of the plurality of main action ropes 2 close to the center of the fixed frame 1 is vertically installed with a series assembly 3, and the other ends of the plurality of series assembly 3 are commonly installed with a central elastic ring 4, and the series connection direction of each assembly in the series assembly 3 is respectively perpendicular to the curved surface tangent of the connection part of the adjacent main action rope 2 and the central elastic ring 4, so as to form a relatively vertical rope network structure of each rope body;

[0033] By using multiple main action ropes 2 and a central elastic ring 4, when the patient performs reciprocating finger clenching and opening, each relatively vertical rope network structure composed of multiple main action ropes 2 and a central elastic ring 4 can respectively provide slight resistance stimulation to the patient's fingers. The slight resistance will continue to provide resistance stimulation to the patient's fingers in the state of motion, which is particularly suitable for the weak stimulation effect required by patients with nerve damage or epilepsy, achieving an effect that cannot be achieved by family members / caregivers' assistance or conventional handgrips;

[0034] The central elastic ring 4 is provided with a plurality of through holes 5 for connecting and fixing the rope body;

[0035] The series assembly 3 includes a connecting rope I 31, one end of which is fixed to the central elastic ring 4 and is distributed perpendicularly to the curved tangent of the connecting portion, the other end of which is fixedly installed with a fixing ring 32, and the other end of which is fixedly installed with a connecting rope II 33, a plurality of arc plates 34 are evenly spaced and arranged on the inner side of the central elastic ring 4, and the inner side of the central elastic ring 4 is fixedly connected to the two ends of the plurality of arc plates 34, and the rope body of the connecting rope I 31 extends in a direction pointing to the middle position of the arc plate 34, and the shaping effect of the arc plate 34 is used to prevent the central elastic ring 4 from being stretched excessively and twisted;

[0036] The arc plate 34 has the same curvature as the inner surface of the central elastic ring 4. The above-mentioned design of consistent curvature can ensure that the deformation of the central elastic ring 4 will be affected by the arc plate 34, thereby forcing it to expand outward in a uniform posture as a whole. The two ends of the arc plate 34 are set to be semicircular, and the outer side of the arc plate 34 is in contact with the inner wall surface of the central elastic ring 4.

[0037] The other end of the connecting rope II 33 is fixed to the surface of the main action rope 2, and the two are distributed in a vertical state. An arc-shaped bracket 35 is fixed to the inner side of the main action rope 2, and the inner side of the main action rope 2 is fixedly connected to the two ends of the arc-shaped bracket 35. The rope body of the connecting rope II 33 extends in the middle of the arc-shaped bracket 35. Through the shaping effect of the arc-shaped bracket 35, the main action rope 2 is prevented from being stretched excessively and twisted.

[0038] The curved tangents of the connecting rope II 33 and the connecting part of the main action rope 2 are perpendicular to each other. Through the above-mentioned structure being arranged perpendicular to the main action rope 2 as a whole, the connecting rope II 33 will exert a vertical outward pulling force on the middle part of the main action rope 2, thereby pulling the main action rope 2 for lateral stretching. By utilizing the principle that the vertical direction of the tightened rope body is easy to undergo damping deformation, the lateral deformation of the main action rope 2 provides a weak resistance for the patient's fingers. One side of the arc-shaped bracket 35 is in close contact with the side surface of the main action rope 2, and the overall curvature of the arc-shaped bracket 35 is consistent with the curvature of one side of the main action rope 2. Inclined surfaces 36 are respectively provided at the left and right ends of the arc-shaped bracket 35. An arc-shaped head 37 is fixedly installed on the side end of the inclined surface 36. The overall length of the shaped bracket 35 is ≥ half of the overall length of the main action rope 2. The arc-shaped head 37 is a semicircular arc structure, and the thickness of the arc-shaped head 37 gradually decreases from one end away from the inclined surface 36 to the other end, and the thickness reaches the minimum value at the position in contact with the inclined surface 36. The inclined surface 36 and the arc-shaped head 37 are seamlessly connected. By utilizing the design of the arc-shaped head 37, when the connecting rope II 33 moves, its outer side will be mutually attached to the main action rope 2 and continuously act relative to it. In the process of relative squeezing of the two structures, the weakest position where the arc-shaped head 37 contacts the inclined surface 36 will be adaptively deformed, so as to be more suitable for the deformation curvature of the connecting rope II 33 and enhance the deformation effect of the connecting rope II 33.

[0039] An auxiliary rope 6 is fixedly installed on one side of the inner wall of the fixing frame 1, a ring 7 is fixedly installed in the middle of the auxiliary rope 6, and a compensation rope 8 is slidably penetrated inside the ring 7. In the initial state of the auxiliary rope 6, the ring 7 and the compensation rope 8, the ring 7 is located in the middle of the compensation rope 8 and is perpendicular to the compensation rope 8 as a whole;

[0040] The cross-sectional diameter of the central elastic ring 4 is greater than the thickness of the arc plate 34, and the cross-sectional diameter of the main action rope 2 is greater than the thickness of the arc bracket 35. By using the above arrangement, the contact effect between the central elastic ring 4 and the arc plate 34, and between the main action rope 2 and the arc bracket 35 can be ensured to be good, thereby enhancing the stability of the structure;

[0041] The main action rope 2, the central elastic ring 4, the connecting rope I31, the connecting rope II33, the auxiliary rope 6 and the compensation rope 8 are all in a taut state. The connecting rope I31 and the connecting rope II33 are located on the same horizontal line after being taut. With the above arrangement, the connecting rope I31 and the connecting rope II33 are located on the same horizontal line after being taut, so that when they are in use, the directions of the forces of the two connecting ropes I31 and II33 are always kept horizontal, thereby improving the matching accuracy and practicality between the structures;

[0042] The main action rope 2 and the auxiliary rope 6 are arc-shaped after being tightened, the connecting rope Ⅰ31 and the connecting rope Ⅱ33 are both straight-lined after being tightened, and the compensation rope 8 is V-shaped after being tightened. The left and right ends of the compensation rope 8 are respectively fixed to the outer middle position of the nearest fixed ring 32. The compensation rope 8 is used to connect the little finger and the thumb during the movement, thereby balancing the problem of uneven force on the fixed frame 1 caused by the large distance between the two.

[0043] The centers of the fixing rings 32 at the head and tail ends of the multiple fixing rings 32 are located on the same horizontal line, and there are both horizontal and vertical spacings between them and the center of the central elastic ring 4. The arc range of the auxiliary rope 6 is larger than the arc range of the main action rope 2. The multiple main action ropes 2 and the auxiliary ropes 6 are located on the same horizontal plane. By utilizing the fact that the multiple main action ropes 2 and the auxiliary ropes 6 are located on the same horizontal plane, during the working process, even if they are fixed separately between the fingers, the state during the action can remain relatively consistent, thereby improving the patient's controllability of the fixing frame 1 and improving the patient's experience when using it.

[0044] For details, please refer to the attached manual Figure 1-Figure 3 The main action rope 2, the central elastic ring 4, the connecting rope I 31, the connecting rope II 33, the auxiliary rope 6 and the compensation rope 8 are all made of high elastic materials, the fixing ring 32 and the fixing frame 1 are all made of non-elastic materials, and a circle of rubber pad is evenly pasted on the inner wall of the fixing ring 32.

[0045] The specific implementation method is: a circle of rubber pad is evenly pasted on the inner wall of the fixing ring 32, so that the five fingers of the patient are inserted into different fixing rings 32, and the rubber pad can be deformed freely to fit the different finger sizes of the patient, further improving the practicality of the device.

[0046] For details, please refer to the attached manual Figure 6A round hole matching the connecting rope II 33 is opened in the middle of the main action rope 2, and the connecting rope II 33 is fixed to the main action rope 2 through the round hole. The elastic force ratio of the auxiliary rope 6 to the main action rope 2 is 1:3.

[0047] The specific implementation method is: the elastic force ratio of the auxiliary rope 6 to the main action rope 2 is 1:3, so that when the overall structure is in use, it mainly consists of multiple separate main action ropes 2 to perform micro-resistance training on the patient's fingers, and the auxiliary rope 6 is mainly used to balance the uneven force problem caused by the large distance between the patient's little finger and thumb.

[0048] Working principle of the present invention:

[0049] Step 1: First, the operator assembles the various components of the device normally, and then uses the device normally.

[0050] Step 2: First, the patient lies flat on the treatment bed used for MRI examination, then with the palm facing up, the patient passes the five fingers through the five fixing rings 32 one by one and keeps them fixed. At this time, the patient gradually contracts his fingers to make a fist and controls the palm to open. In the process of the patient making a fist, the multiple fixing rings 32 will drive the connecting rope Ⅱ 33 and the arc-shaped bracket 35 arranged on the outside thereof to move synchronously toward the center of the circle of the central elastic ring 4. At this time, the connecting rope Ⅱ 33 will exert a vertical outward pulling force on the middle part of the main action rope 2, thereby pulling the main action rope 2 for lateral stretching, and ensuring that the arc-shaped bracket 35 on the other side of the main action rope 2 always maintains a uniform fit with the main action rope 2, thereby ensuring that the main action rope 2 always maintains an arc shape and is stretched, and its pulled After stretching, it will not form a V shape to cause the problem of uneven force. At this time, the lateral deformation of the main action rope 2 provides a weak resistance for the patient's fingers (when the external force is perpendicular to the middle of the main action rope 2, when it is stretched, only a weak force is needed to complete the deformation, and when the force is parallel to the central axis of the main action rope 2, the external force must act on the entire main action rope 2 to stretch it. This characteristic is the deformation characteristic of the main action rope 2). When the patient's palm opens, the multiple fixing rings 32 will drive the connecting rope Ⅰ31 and the arc plate 34 set on the inner side thereof to move synchronously in the direction away from the center of the circle of the central elastic ring 4. At this time, the arc plate 34 fixed at one end of the connecting rope Ⅰ31 will gradually push the central elastic ring 4 outward to deform, and And the direction of the force is also perpendicular to the outside of the central elastic ring 4. At this time, the five fingers act synchronously on the central elastic ring 4, and the central elastic ring 4 provides a slight resistance to the patient's fingers. In the process of the patient making a fist and opening the palm, the auxiliary rope 6 between the fixing ring 32 where the little finger and the thumb are fixed will change in length as the force between the little finger and the thumb is uneven, that is, the auxiliary rope 6 will slide left and right inside the ring 7, so as to change the length of the auxiliary rope 6 on both sides of the ring 7, so as to connect the little finger and the thumb during the movement, and then balance the problem of uneven force on the fixing frame 1 caused by the large distance between the two (due to the distribution characteristics of human fingers, the distances between other fingers are almost equal, and the little finger and the thumb are almost equal in the process of making a fist and opening the palm). During the process of clenching and opening the fist, a large distance will be maintained, and the existence of this distance will affect the uniformity of the force exerted by each finger on the outer fixed frame 1), and during the sliding process of the auxiliary rope 6, the ring 7 and the compensation rope 8 fixed on one side thereof can be continuously acted upon. Since the compensation rope 8 is initially in a taut state, in the taut state, the change of the auxiliary rope 6 will affect the compensation rope 8 to continue to stretch toward the center or to shrink and recover outward, thereby balancing the problem of uneven force caused by the large distance between the little finger and the thumb, and during the process of the patient's reciprocating finger clenching and opening the fist, a plurality of main action ropes 2 and a central elastic ring 4 respectively exert a small resistance stimulation on the patient's fingers, and this weak resistance will continue to provide resistance stimulation to the patient's fingers in the state of motion,The hand movement stimulation is transmitted and radiated to different brain nerve areas of the patient, thereby activating different nerve areas of the patient, so as to more accurately confirm whether the lesions of the patient with nerve damage have invaded the finger motor function area, and provide a more accurate reference basis for the examination process, so as to achieve the purpose of accurate examination. Finally, the device completes the process of effectively stimulating the patient's fingers and brain nerve areas during the MRI examination.

[0051] Step 3: First, the operator shuts down the device normally, then checks whether the fixation between the various components of the device is normal, and then replaces and repairs the aging and severely worn parts inside the device. Example 2

[0052] As attached Figure 1 To Attachment Fig.10 As shown, first, a fixed ring is fixed on one side of the arc-shaped bracket 35 close to the main action rope 2, and at both ends. At the same time, the main action rope 2 is made to fit in contact with the side of the arc-shaped bracket 35, and the main action rope 2 is restricted by passing through the two fixed rings to avoid the main action rope 2 and the side of the arc-shaped bracket 35 flipping up and down when the main action rope 2 is gradually tightened. The stability between the main action rope 2 and the arc-shaped bracket 35 is further increased when the connecting rope II 33 pulls the main action rope 2, and the problem of the main action rope 2 detaching from the surface of one side of the arc-shaped bracket 35 is avoided, thereby further improving the practical effect of the overall structure.

[0053] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0054] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0055] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A magnetic resonance imaging device for hand function, characterized in that: It comprises a fixing frame, which is an annular structure as a whole, and a plurality of main action ropes are sequentially installed on the inner wall surface of the fixing frame, and a series assembly is vertically installed in the middle of the plurality of main action ropes close to the center of the fixing frame, and a central elastic ring is commonly installed at the other end of the plurality of series assembly; the series connection direction of each assembly in the series assembly is respectively perpendicular to the curved surface tangent of the connecting part of the adjacent main action rope and the central elastic ring, so as to form a rope body network structure in which each rope body is relatively vertical; The series assembly includes a connecting rope I, one end of which is fixed to the central elastic ring and maintained in a vertical state with the tangent of the curved surface at the connection position, the other end of which is fixedly installed with a fixing ring, and the other end of which is fixedly installed with a connecting rope II, a plurality of arc-shaped plates are evenly spaced and arranged on the inner side of the central elastic ring, and the inner side of the central elastic ring is fixedly connected to the two ends of the plurality of arc-shaped plates, and the extension direction of the connecting rope I points to the middle position of the arc-shaped plate; the inner surface curvature of the arc-shaped plate is consistent with that of the central elastic ring, and the two ends of the arc-shaped plate are arranged in semicircular shape; The other end of the connecting rope II is fixed to the surface of the main action rope, and the two are distributed in a vertical state. An arc-shaped bracket is fixed to the inner side of the main action rope, and the inner side of the main action rope is fixedly connected to the two ends of the arc-shaped bracket. The extension direction of the connecting rope II points to the middle of the arc-shaped bracket. The curved surface tangents of the connecting portion of the rope body of the connecting rope II and the main action rope are perpendicular to each other, and the overall curvature of the arc-shaped bracket is consistent with the curvature of one side of the main action rope. The left and right ends of the arc-shaped bracket are respectively provided with inclined surfaces, and the side ends of the inclined surfaces are fixedly installed with arc-shaped heads. The overall length of the arc-shaped bracket is ≥ half of the overall length of the main action rope, and the overall arc-shaped head is a semicircular arc structure; An auxiliary rope is fixedly installed on one side of the inner wall of the fixing frame, a ring is fixedly installed in the middle of the auxiliary rope, a compensation rope is slidably penetrated inside the ring, and in the initial state of the auxiliary rope, the ring and the compensation rope, the ring is located in the middle of the compensation rope and is perpendicular to the compensation rope as a whole; The main action rope, the central elastic ring, the connecting rope I, the connecting rope II, the auxiliary rope and the compensating rope are all in a taut state, and the connecting rope I and the connecting rope II are located on the same horizontal line after being taut; The main action rope and the auxiliary rope are arc-shaped after being tightened, the connecting rope I and the connecting rope II are both straight-line-shaped after being tightened, and the compensation rope is V-shaped after being tightened. The left and right ends of the compensation rope are respectively fixed to the outer middle position of the nearest fixing ring.

2. The MRI hand function imaging auxiliary device according to claim 1, characterized in that: The main action rope, central elastic ring, connecting rope I, connecting rope II, auxiliary rope and compensation rope are all made of high-elastic materials. The fixing ring and fixing frame are made of non-elastic materials as a whole, and a circle of rubber pad is evenly pasted on the inner wall of the fixing ring. The thickness of the arc-shaped head gradually decreases from one end away from the inclined surface to the other end, and the thickness reaches the minimum value at the position in contact with the inclined surface. The inclined surface and the arc-shaped head are seamlessly connected. The cross-sectional diameter of the central elastic ring is larger than the thickness of the arc plate, and the cross-sectional diameter of the main action rope is larger than the thickness of the arc bracket.

3. The MRI hand function imaging auxiliary device according to claim 1, characterized in that: A round hole matching with the connecting rope II is opened in the middle of the main action rope, and the connecting rope II is fixed between the round hole and the main action rope.

4. The MRI hand function imaging auxiliary device according to claim 1, characterized in that: The elastic force ratio of the auxiliary rope to the main action rope is 1:

3.

5. The MRI hand function imaging auxiliary device according to claim 1, characterized in that: The centers of the fixing rings at the head and tail ends of the multiple fixing rings are located on the same horizontal line, and there are both horizontal and vertical spacings between them and the center of the central elastic ring.

6. The MRI hand function imaging auxiliary device according to claim 1, characterized in that: The arc range of the auxiliary rope is larger than the arc range of the main action rope, and the plurality of main action ropes and the auxiliary ropes are located on the same horizontal plane.

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