Limb joint magnetic resonance coil fixing structure that is easy to disassemble

Abstract

The invention relates to the technical field of magnetic resonance equipment, and in particular to a detachable limb joint magnetic resonance coil fixing structure, comprising a transmitting coil detachably mounted in a magnet detection hole, wherein the front end of the magnet detection hole is provided with a front end limiting device for limiting the transmitting coil, and the rear end of the magnet detection hole is provided with a rear end limiting component for locking the transmitting coil; a transmitting coil track groove is provided on the inner wall of the transmitting coil, and a receiving coil track bar used in conjunction with the transmitting coil track groove is provided on the outer wall of the receiving coil, the receiving coil is slidably mounted in the transmitting coil, and a locking device is provided between the receiving coil track bar and the transmitting coil track groove; the invention can arbitrarily match transmitting coils and receiving coils of different specifications, and in addition, the rear end limiting component on the magnet detection hole is also compatible with various transmitting coils, so that an operator can quickly switch the transmitting coil and the receiving coil, thereby extending the service life and improving the operating efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of magnetic resonance equipment, and in particular to a limb joint magnetic resonance coil fixing structure which is easy to disassemble. Background Art

[0002] At present, in the field of nuclear magnetic resonance, domestic limb joint magnetic resonance products have begun to be applied to clinical examinations. Compared with whole-body magnetic resonance systems, limb joint magnetic resonance systems have the advantages of light size, small footprint, flexible examination of ankles, knees, hands, elbows and other limbs, and clear imaging. They are gradually being accepted and installed by major hospitals and testing centers.

[0003] Since the imaging aperture of MRI of limb joints is generally small, and its volume limitation also leads to the corresponding small diameters of transmitting coils and receiving coils. A single type of coil cannot meet multiple functional requirements. During clinical testing, it is often necessary to switch between multiple types of coils, and different types of transmitting coils and receiving coils need to be freely matched. Therefore, the connector between the two needs to be easy to disassemble and have a long service life, and the transmitting coil and the magnet detection hole also need to be easy to disassemble.

[0004] Currently, there are few types of coils for limb joint magnetic resonance equipment on the market, and the related supporting facilities are not mature. In addition, the service life of the connecting parts between the transmitting coil and the magnet detection hole in the existing technology is short, which affects the use efficiency and service life of the limb joint magnetic resonance equipment. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a limb joint magnetic resonance coil fixing structure that can be widely used in the field of small-aperture magnetic resonance, is convenient for disassembling and switching coils, has a simple structure, a small size, is convenient and practical, and reduces the workload of medical personnel in frequently switching coils during examinations.

[0006] In order to solve the above technical problems, the technical solution of the present invention is: a limb joint magnetic resonance coil fixing structure that is easy to disassemble, including a transmitting coil that can be detachably installed in a magnet detection hole, the front end of the magnet detection hole is provided with a front end limiting device for limiting the transmitting coil, and the rear end of the magnet detection hole is provided with a rear end limiting assembly for locking the transmitting coil; a transmitting coil track groove is provided on the inner wall of the transmitting coil, and a receiving coil track bar used in conjunction with the transmitting coil track groove is provided on the outer wall of the receiving coil, the receiving coil is slidably installed in the transmitting coil, and a locking device is provided between the receiving coil track bar and the transmitting coil track groove.

[0007] As a preferred technical solution, the transmitting coil includes an outer cylinder and an inner cylinder sleeved inside the outer cylinder, the transmitting coil track groove is a stepped groove body opened on the inner wall of the inner cylinder and extending axially, the rear end width of the transmitting coil track groove is greater than the front end width, a guide flange is provided at the connection between the rear end and the front end, the slot width of the transmitting coil track groove is less than the slot bottom width, the rear end of the transmitting coil track groove is provided with a receiving coil limiting hole penetrating the inner cylinder, and the rear end of the transmitting coil penetrates the inner cylinder and the outer cylinder and is provided with a transmitting coil locking opening used in conjunction with the rear end limiting assembly.

[0008] As a preferred technical solution, the locking device includes a long hole opened on the outer cylinder, a long arc plate is movably installed in the long hole, the two ends of the long arc plate are respectively fixedly connected to the inner cylinder, a guide column is fixedly installed in the middle of the inner side surface of the long arc plate, a spring is mounted on the guide column, a receiving coil limit strip is fixedly installed on the top of the guide column, the middle protrusion of the receiving coil limit strip is provided with a protrusion, and the protrusion can extend out of the receiving coil limit hole when it pops up, and a limiting bayonet is provided at the rear of the receiving coil track strip, and the limiting bayonet can be clamped on the protrusion when it moves along the transmitting coil track groove and passes through the protrusion, and the receiving coil limit strip is controlled to rise and fall by a lifting drive device.

[0009] As a preferred technical solution, the lifting drive device includes a guide arc plate fixedly installed on the inner wall of the outer cylinder, and driving unlocking arms are slidably installed on both sides of the guide arc plate. The front end bottom of the driving unlocking arm is respectively provided with a driving inclined surface, and the two ends of the upper surface of the receiving coil limit bar are respectively provided with a passive inclined surface used in conjunction with the driving inclined surface. When the driving unlocking arm drives the driving inclined surface to move forward, the passive inclined surface is pressed to move downward, thereby driving the receiving coil limit bar to disengage from the receiving coil limit hole.

[0010] As a preferred technical solution, a through hole is provided at the rear end of the inner cylinder for the drive unlocking arm to extend out, and a drive handle is provided at the rear ends connecting the two drive unlocking arms.

[0011] As a preferred technical solution, the rear end limit assembly includes a lock hole opened on the rear end inner wall of the magnet detection hole, and also includes a transmitting coil limit device installed inside the magnet detection hole and capable of popping out and retracting into the lock hole, and the extension direction of the transmitting coil limit device is along the radial direction of the magnet detection hole.

[0012] As a preferred technical solution, the transmitting coil limiting device includes a limiting device body fixedly installed on the magnet detection hole, a guide groove is provided on the rear side surface of the limiting device body, a guide hole is provided at the bottom of the guide groove, a slider is slidably installed in the guide groove, a card slot is provided on the rear side surface of the slider, a transmitting coil limiting block is fixedly installed on the top of the slider, two guide columns arranged in parallel and spaced apart are fixedly installed on the bottom end of the slider, the two guide columns respectively penetrate the corresponding guide holes, a return spring is mounted on the guide column located in the guide groove, a pin is fixedly installed on the bottom wall of the guide groove, a swing arm is rotatably installed on the pin, and a hook used in conjunction with the card slot is provided at the free end of the swing arm, and the hook realizes the up and down displacement of the transmitting coil limiting block by unidirectional cyclic multi-point displacement in the card slot.

[0013] As a preferred technical solution, a cover plate with a shape matching the limit device body is detachably mounted on the rear side surface thereof, a side of the cover plate facing the guide groove is provided with an avoidance groove for avoiding the swing arm, a avoidance cavity is hollowed out on the bottom surface of the transmitting coil limit block, the top end of the slider is fixedly mounted in the avoidance cavity, the length of the avoidance cavity is greater than the top length of the limit device body, and the width of the avoidance cavity is greater than the total top width of the limit device body and the cover plate combined together.

[0014] As a preferred technical solution, the front end limiting device is a limiting ring, the limiting ring is provided with a limiting protrusion, the front end of the transmitting coil is provided with a limiting recess matching the limiting protrusion, when the limiting recess is engaged with the limiting protrusion, the rear end limiting assembly locks the transmitting coil in the magnet detection hole.

[0015] As a preferred technical solution, the receiving coil track bar is a long strip fixedly installed at the bottom of the outer wall of the receiving coil, the cross-sectional shape of the receiving coil track bar is adapted to the cross-sectional shape of the transmitting coil track groove, and a receiving coil handle is provided at the rear end of the receiving coil.

[0016] Due to the adoption of the above technical scheme, a limb joint magnetic resonance coil fixing structure that is easy to disassemble comprises a transmitting coil that is detachably installed in a magnet detection hole, a front end limit device for limiting the transmitting coil is provided at the front end of the magnet detection hole, and a rear end limit assembly for locking the transmitting coil is provided at the rear end of the magnet detection hole; a transmitting coil track groove is provided on the inner wall of the transmitting coil, a receiving coil track bar used in conjunction with the transmitting coil track groove is provided on the outer wall of the receiving coil, the receiving coil is slidably installed in the transmitting coil, and a locking device is provided between the receiving coil track bar and the transmitting coil track groove; the beneficial effects of the present invention are as follows: according to different detection positions and specific functional requirements, a plurality of transmitting coils and receiving coils of different specifications can be switched, each group of transmitting coils is provided with a transmitting coil track groove with the same structure, each group of receiving coils is provided with a receiving coil track bar with the same structure, and the locking device structure between the receiving coil track bar and the transmitting coil track groove is also the same, so transmitting coils and receiving coils of different specifications can be matched at will, and in addition, the rear end limit assembly on the magnet detection hole is also compatible with various transmitting coils, so the operator can quickly switch the transmitting coil and the receiving coil, and the stability of the structure prolongs the service life and improves the operating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following drawings are intended only to illustrate and explain the present invention, and are not intended to limit the scope of the present invention.

[0018] Figure 1 It is a schematic structural diagram of the disassembled state of the limb joint magnetic resonance coil fixing structure that is easy to disassemble according to the present invention;

[0019] Figure 2 It is a schematic diagram of the structure after the transmitting coil and the receiving coil of the present invention are installed;

[0020] Figure 3 It is a schematic structural diagram of the unlocked state of the rear end limit assembly of the magnet detection hole of the present invention;

[0021] Figure 4 It is a schematic structural diagram of the locking state of the rear end limit assembly of the magnet detection hole of the present invention;

[0022] Figure 5 It is a schematic diagram of the disassembled structure of the transmitting coil limiting device of the present invention;

[0023] Figure 6 It is a schematic diagram of the structure of the combined state of the transmitting coil of the present invention;

[0024] Figure 7 yes Figure 6 Sectional view along AA direction;

[0025] Figure 8 It is a partial structural schematic diagram of the inner cylinder of the transmitting coil of the present invention;

[0026] Fig. 9 It is a structural schematic diagram of the receiving coil of the present invention;

[0027] Fig.10 is a cross-sectional view of a combination of a transmitting coil and a receiving coil of the present invention;

[0028] Fig.11 yes Fig.10 A partial enlarged view of the unlocking state at position I in the middle;

[0029] Fig.12 yes Fig.10 A partial enlarged view of the locking state at position I in the middle;

[0030] Fig.13 This is one of the partial structural schematic diagrams of the outer cylinder of the transmitting coil of the present invention;

[0031] Fig.14 It is one of the partial structural schematic diagrams of the locking device of the present invention;

[0032] Fig.15 This is the second partial structural schematic diagram of the locking device of the present invention;

[0033] Fig.16 It is a schematic structural diagram of the front end limit device of the magnet detection hole of the present invention;

[0034] Fig.17 It is a structural schematic diagram of the swing arm of the present invention;

[0035] Fig.18 This is the second partial structural schematic diagram of the outer cylinder of the transmitting coil of the present invention;

[0036] Fig.19 It is a schematic diagram of the matching structure of the card slot and the card hook of the present invention;

[0037] Fig. 20 It is the use effect diagram of the present invention.

[0038] In the figure: 1-magnet detection hole; 11-front end limit device; 111-limiting protrusion; 12-rear end limit assembly; 121-locking hole; 122-limiting device body; 1221-guide groove; 1222-guide hole; 123-slider; 1231-card slot; 12311-first position; 12312-second position; 12313-third position; 12314-fourth position; 124-transmitting coil limit block; 1241-avoidance cavity; 125-guide column; 126-reset spring; 127-pin shaft; 128-swing arm; 1281-card hook; 129-cover plate; 1291-avoidance slot; 2-transmitting line Ring; 21-outer cylinder; 22-inner cylinder; 23-transmitting coil track groove; 231-guide flange; 232-receiving coil limiting hole; 24-transmitting coil locking mouth; 25-transmitting coil handle; 26-limiting depression; 3-receiving coil; 31-receiving coil track bar; 311-limiting bayonet; 32-receiving coil handle; 4-locking device; 41-long hole; 42-long arc plate; 43-guide column; 44-spring; 45-receiving coil limiting strip; 451-bump; 452-passive inclined plane; 5-lifting drive device; 51-guide arc plate; 52-driving unlocking arm; 521-driving inclined plane; 53-driving handle. DETAILED DESCRIPTION

[0039] The present invention is further described below in conjunction with the accompanying drawings and examples. In the following detailed description, certain exemplary embodiments of the present invention are described only by way of illustration. Needless to say, those of ordinary skill in the art will recognize that the described embodiments may be modified in various ways without departing from the spirit and scope of the present invention. Therefore, the drawings and description are illustrative in nature and are not intended to limit the scope of protection of the claims.

[0040] like Figures 1 to 20As shown in the figure, the limb joint magnetic resonance coil fixing structure which is easy to disassemble comprises a transmitting coil 2 which can be detachably installed in a magnet detection hole 1, the front end of the magnet detection hole 1 is provided with a front end limiting device 11 for limiting the transmitting coil 2, and the rear end of the magnet detection hole 1 is provided with a rear end limiting component 12 for locking the transmitting coil 2; a transmitting coil track groove 23 is provided on the inner wall of the transmitting coil 2, a receiving coil track bar 31 used in conjunction with the transmitting coil track groove 23 is provided on the outer wall of the receiving coil 3, the receiving coil 3 is slidably installed in the transmitting coil 2, and a locking device 4 is provided between the receiving coil track bar 31 and the transmitting coil track groove 23; according to different detection positions and Specific functional requirements: a plurality of transmitting coils 2 and receiving coils 3 of different specifications can be switched, each group of transmitting coils 2 is provided with a transmitting coil track groove 23 of the same structure, each group of receiving coils 3 is provided with a receiving coil track bar 31 of the same structure, and the locking device 4 between the receiving coil track bar 31 and the transmitting coil track groove 23 is also the same in structure, so transmitting coils 2 and receiving coils 3 of different specifications can be matched at will, and in addition, the rear end limit assembly 12 on the magnet detection hole 1 is also compatible with various transmitting coils 2, so the operator can quickly switch the transmitting coil 2 and the receiving coil 3, and the stability of the structure prolongs the service life and improves the operating efficiency.

[0041] like Figure 1 , Figure 2 , Figure 8 , Fig.10 , Fig.13 and Fig.18As shown together, the transmitting coil 2 includes an outer cylinder 21 and an inner cylinder 22 sleeved inside the outer cylinder 21. The transmitting coil track groove 23 is a stepped groove body opened on the inner wall of the inner cylinder 22 and extending axially. The rear end width of the transmitting coil track groove 23 is greater than the front end width. A guide flange 231 is provided at the connection between the rear end and the front end. The slot width of the transmitting coil track groove 23 is less than the slot bottom width. A receiving coil limiting hole 232 penetrating the inner cylinder 22 is provided at the rear end of the transmitting coil track groove 23. The rear end of the transmitting coil 2 penetrates the inner cylinder 22 and the outer cylinder 21 and is provided with a transmitting coil locking opening 24 used in conjunction with the rear end limiting assembly 12. The outer cylinder 21 and the inner cylinder 22 are buckled together to form the transmitting coil 2. Transmitting coil handles 25 are provided on both sides of the rear end of the transmitting coil 2 to facilitate holding the transmitting coil 2 when installing it. The width of the transmitting coil track groove 23 matches the width of the receiving coil track bar 31. The receiving coil track bar 31 enters from the rear end of the transmitting coil track groove 23 and moves toward the front end of the transmitting coil track groove 23 under the action of the guide flange 231 until it abuts against the front end surface of the transmitting coil track groove 23. At this time, the limit bayonet 311 is located at the long hole 41. The slot width of the transmitting coil track groove 23 is smaller than the slot bottom width, which can ensure that the receiving coil track bar 31 will not be separated from the transmitting coil track groove 23 up and down, left and right, and can only move in the direction in which the transmitting coil track groove 23 extends, ensuring the stability of the receiving coil 3 when moving. The transmitting coil locking opening 24 is used to lock with the magnet detection hole 1.

[0042] like Figures 9 to 15 , Fig.18 The locking device 4 includes a long hole 41 formed on the outer tube 21, in which a long arc plate 42 is movably installed, and both ends of the long arc plate 42 are fixedly connected to the inner tube 22 respectively. A guide column 43 is fixedly installed in the middle of the inner side surface of the long arc plate 42, and a spring 44 is sleeved on the guide column 43. A receiving coil limiting strip 45 is fixedly installed on the top of the guide column 43. A protrusion 451 is protruded in the middle of the receiving coil limiting strip 45. When the protrusion 451 pops up, it can extend out of the receiving coil limiting hole 232. A limiting bayonet 311 is provided at the rear of the receiving coil track strip 31. When the limiting bayonet 311 moves along the transmitting coil track groove 23 and passes through the protrusion 451, it can be clamped on the protrusion 451. The receiving coil limiting strip 45 is controlled to rise and fall by the lifting drive device 5. The shape of the long arc plate 42 is compatible with the shape of the long hole 41, and the long arc plate 42 is fixedly connected to the inner tube 22, so that when the lifting drive device 5 controls the up and down displacement of the receiving coil limit bar 45, the long arc plate 42 will not interfere with it. In addition, the guide column 43 and the spring 44 ensure the stability of the receiving coil limit bar 45 when it moves up and down.

[0043] like Figures 3 to 13 , Fig.18The lifting drive device 5 includes a guide arc plate 51 fixedly mounted on the inner wall of the outer cylinder 21, and driving unlocking arms 52 are slidably mounted on both sides of the guide arc plate 51. The front end bottom of the driving unlocking arms 52 is respectively provided with driving inclined surfaces 521. Both ends of the upper surface of the receiving coil limit strip 45 are respectively provided with passive inclined surfaces 452 used in conjunction with the driving inclined surfaces 521. When the driving unlocking arm 52 drives the driving inclined surface 521 to move forward, the passive inclined surface 452 is pressed to move downward, thereby driving the receiving coil limit strip 45 to disengage from the receiving coil limit hole 232. Figure 2 and Fig.13 As shown in the figure, the rear end of the inner cylinder 22 is provided with a through hole for the driving unlocking arm 52 to extend out, and the rear ends of the two driving unlocking arms 52 are connected with a driving handle 53. The guide arc plate 51 guides the displacement of the driving unlocking arm 52, and the driving handle 53 controls the front and rear displacement of the driving unlocking arm 52.

[0044] When installing the receiving coil 3, it is necessary to place the front end of the receiving coil track bar 31 of the receiving coil 3 on the tail end of the transmitting coil track groove 23, and push the receiving coil handle 32 forward by hand. The transmitting coil track groove 23 and the receiving coil track bar 31 are tightly matched, which can ensure that the receiving coil 3 only slides back and forth on the transmitting coil track groove 23 without shaking. The protrusion 451 is in the pop-up position under the elastic force of the spring 44 in the default state. When the receiving coil track bar 31 passes through the long hole 41 of the transmitting coil track groove 23, the protrusion 451 is pressed down under the gravity of the receiving coil 3, and the front end of the receiving coil track bar 31 can pass through the transmitting coil track groove 23 normally. When the front end of the receiving coil track bar 31 touches the front end surface of the transmitting coil track groove 23, the limit bayonet 311 on the receiving coil track bar 31 is exactly located on the protrusion 451. At this time, the protrusion 451 pops up to lock the receiving coil track bar 31, and the installation of the transmitting coil 2 is completed.

[0045] When removing the receiving coil 3, push the driving handle 53 forward, the driving handle 53 is fixedly connected to the driving unlocking arm 52, and the front end of the driving unlocking arm 52 is provided with a driving inclined surface 521, which contacts the passive inclined surface 452 on the receiving coil limit bar 45. Under the action of the thrust, the receiving coil limit bar 45 moves downward, driving the protrusion 451 to move downward, and the spring 44 is compressed. At this time, pull the receiving coil handle 32, the receiving coil 3 can be pulled out smoothly, and the removal of the receiving coil 3 is completed. When switching the receiving coil 3, just follow the above steps.

[0046] like Figure 1 , Figures 3 to 7As shown together, the rear end limit assembly 12 includes a lock hole 121 opened on the rear end inner wall of the magnet detection hole 1, and also includes a transmitting coil limit device installed inside the magnet detection hole 1 and capable of popping out and retracting into the lock hole 121, and the telescopic direction of the transmitting coil limit device is along the radial direction of the magnet detection hole 1. When the transmitting coil limit device pops out, it extends into the lock hole 121 to lock the transmitting coil 2, and when the transmitting coil limit device retracts, the transmitting coil 2 is unlocked, and the transmitting coil 2 can be removed.

[0047] like Figures 3 to 7 , Fig.17 and Fig.19 As shown in the figure, the transmitting coil limiting device includes a limiting device body 122 fixedly mounted on the magnet detection hole 1, a guide groove 1221 is provided on the rear side of the limiting device body 122, a guide hole 1222 is provided at the bottom of the guide groove 1221, a slider 123 is slidably mounted in the guide groove 1221, a clamping groove 1231 is provided on the rear side of the slider 123, a transmitting coil limiting block 124 is fixedly mounted on the top of the slider 123, and two parallel guide posts arranged at intervals are fixedly mounted on the bottom of the slider 123 125, two guide posts 125 respectively penetrate their corresponding guide holes 1222, and a return spring 126 is mounted on the guide post 125 located in the guide slot 1221, a pin 127 is fixedly mounted on the bottom wall of the guide slot 1221, a swing arm 128 is rotatably mounted on the pin 127, and a hook 1281 is provided at the free end of the swing arm 128 for use with the slot 1231, and the hook 1281 realizes the up and down displacement of the transmitting coil limit block 124 by unidirectional cyclic multi-point displacement in the slot 1231. Figures 3 to 7 As shown together, a cover plate 129 with a shape matching the limit device body 122 is detachably installed on the rear side surface thereof, and an avoidance groove 1291 for avoiding the swing arm 128 is provided on the side of the cover plate 129 facing the guide groove 1221, and an avoidance cavity 1241 is hollowed out on the bottom surface of the transmitting coil limit block 124, and the top end of the slider 123 is fixedly installed in the avoidance cavity 1241, and the length of the avoidance cavity 1241 is greater than the top length of the limit device body 122, and the width of the avoidance cavity 1241 is greater than the total top width of the limit device body 122 and the cover plate 129 combined together.

[0048] When the transmitting coil limit block 124 is in the pop-up state, Figure 4 and Fig.19As shown, the hook 1281 is located at the first position 12311 of the slot 1231. When installing the transmitting coil 2, the transmitting coil 2 needs to be placed in the magnet detection hole 1, and the transmitting coil limit block 124 needs to be in a compressed state. At this time, the transmitting coil limit block 124 is manually pressed, the slider 123 slides downward, the hook 1281 slides along the slot 1231, and the hook 1281 swings along the pin 127 with the swing arm 128. When the hook 1281 slides to the second position 12312 of the slot 1231, you can let go. At this time, the slider 123 slides upward under the elastic action of the reset spring 126, and the hook 1281 automatically slides to the fourth position 12314 of the slot 1231. The hook 1281 clamps the slider 123, the transmitting coil limit block 124 is in a compressed state, and the transmitting coil 2 can be smoothly pushed along the magnet detection hole 1.

[0049] When the front end surface of the transmitting coil 2 touches the front end limit device 11, it reaches the installation position, and the transmitting coil locking opening 24 just passes through the transmitting coil limit block 124. Manually press the transmitting coil limit block 124, the slider 123 slides downward, and the hook 1281 slides along the slot 1231. When the hook 1281 slides to the third position 12313, you can let go. At this time, the slider 123 slides upward under the elastic action of the reset spring 126, and the hook 1281 automatically slides to the first position 12311 of the slot 1231. The hook 1281 clamps the slider 123, the transmitting coil limit block 124 is in a pop-up state, and the transmitting coil locking opening 24 just passes through the transmitting coil limit block 124, and the transmitting coil 2 is locked. Repeat the above steps when switching the transmitting coil 2.

[0050] like Figure 1 , Figure 2 and Fig.16 As shown together, the front-end limiting device 11 is a limiting ring, on which a limiting protrusion 111 is provided, and the front end of the transmitting coil 2 is provided with a limiting recess 26 matched with the limiting protrusion 111. When the limiting recess 26 is engaged with the limiting protrusion 111, the rear-end limiting assembly 12 locks the transmitting coil 2 in the magnet detection hole 1. The limiting protrusion 111 not only plays a limiting role in the axial direction, but also plays a limiting role in the circumferential direction.

[0051] like Figure 2 and Fig. 9 As shown in the figure, the receiving coil track bar 31 is a long bar fixedly installed at the bottom of the outer wall of the receiving coil 3. The cross-sectional shape of the receiving coil track bar 31 is adapted to the cross-sectional shape of the transmitting coil track groove 23. A receiving coil handle 32 is provided at the rear end of the receiving coil 3. The cross-sectional shape of the receiving coil track bar 31 is not limited, and it only needs to be adapted to the cross-sectional shape of the transmitting coil track groove 23. The receiving coil handle 32 facilitates pushing and pulling the receiving coil 3.

[0052] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A limb joint magnetic resonance coil fixing structure that is easy to disassemble, characterized in that: The invention comprises a transmitting coil (2) which is detachably mounted in a magnet detection hole (1); a front end limit device (11) for limiting the transmitting coil (2) is provided at the front end of the magnet detection hole (1); a rear end limit component (12) for locking the transmitting coil (2) is provided at the rear end of the magnet detection hole (1); a transmitting coil track groove (23) is provided on the inner wall of the transmitting coil (2); a receiving coil track bar (31) for use with the transmitting coil track groove (23) is provided on the outer wall of the receiving coil (3); the receiving coil (3) is slidably mounted in the transmitting coil (2); a locking device (4) is provided between the receiving coil track bar (31) and the transmitting coil track groove (23); The transmitting coil (2) comprises an outer cylinder (21) and an inner cylinder (22) sleeved inside the outer cylinder (21); the transmitting coil track groove (23) is a stepped groove body provided on the inner wall of the inner cylinder (22) and extending axially; the rear end width of the transmitting coil track groove (23) is greater than the front end width; a guide flange (231) is provided at the connection between the rear end and the front end; the slot width of the transmitting coil track groove (23) is less than the slot bottom width; a receiving coil limiting hole (232) penetrating the inner cylinder (22) is provided at the rear end of the transmitting coil track groove (23); and a transmitting coil locking opening (24) used in conjunction with the rear end limiting assembly (12) is provided at the rear end of the transmitting coil (2) penetrating the inner cylinder (22) and the outer cylinder (21); The locking device (4) comprises a long hole (41) formed on the outer tube (21), a long arc plate (42) being movably mounted in the long hole (41), two ends of the long arc plate (42) being fixedly connected to the inner tube (22) respectively, a guide column (43) being fixedly mounted in the middle of the inner side surface of the long arc plate (42), a spring (44) being sleeved on the guide column (43), a receiving coil limit strip (45) being fixedly mounted on the top end of the guide column (43), and the receiving coil A protrusion (451) is provided in the middle of the limit strip (45), and when the protrusion (451) pops up, it can extend out of the receiving coil limit hole (232); a limit snap-in (311) is provided at the rear of the receiving coil track strip (31); when the limit snap-in (311) moves along the transmitting coil track groove (23) and passes through the protrusion (451), it can snap onto the protrusion (451); the receiving coil limit strip (45) is raised and lowered by a lifting drive device (5); The lifting drive device (5) comprises a guide arc plate (51) fixedly mounted on the inner wall of the outer cylinder (21), and drive unlocking arms (52) are slidably mounted on both sides of the guide arc plate (51), and the front end bottom of the drive unlocking arm (52) is respectively provided with a drive inclined surface (521), and both ends of the upper surface of the receiving coil limiting strip (45) are respectively provided with a passive inclined surface (452) used in conjunction with the drive inclined surface (521), and when the drive unlocking arm (52) drives the drive inclined surface (521) to move forward, the passive inclined surface (452) is pressed to move downward, thereby driving the receiving coil limiting strip (45) to disengage from the receiving coil limiting hole (232).

2. The easily disassembled limb joint magnetic resonance coil fixing structure according to claim 1, characterized in that: A through hole for the driving unlocking arm (52) to extend out is provided at the rear end of the inner cylinder (22), and a driving handle (53) is provided at the rear ends connecting the two driving unlocking arms (52).

3. The easily disassembled limb joint magnetic resonance coil fixing structure according to claim 1, characterized in that: The rear end limit assembly (12) comprises a lock hole (121) provided on the rear end inner wall of the magnet detection hole (1), and also comprises a transmitting coil limit device installed inside the magnet detection hole (1) and capable of popping out of and retracting into the lock hole (121), wherein the telescopic direction of the transmitting coil limit device is along the radial direction of the magnet detection hole (1).

4. The easily disassembled limb joint magnetic resonance coil fixing structure as claimed in claim 3, characterized in that: The transmitting coil limiting device comprises a limiting device body (122) fixedly mounted on the magnet detection hole (1); a guide groove (1221) is provided on the rear side of the limiting device body (122); a guide hole (1222) is provided at the bottom of the guiding groove (1221); a slider (123) is slidably mounted in the guiding groove (1221); a clamping groove (1231) is provided on the rear side of the slider (123); a transmitting coil limiting block (124) is fixedly mounted on the top of the slider (123); and two guide posts (125) arranged in parallel and spaced apart are fixedly mounted on the bottom of the slider (123). The guide posts (125) respectively penetrate the corresponding guide holes (1222); a return spring (126) is sleeved on the guide posts (125) located in the guide slots (1221); a pin shaft (127) is fixedly mounted on the bottom wall of the guide slots (1221); a swing arm (128) is rotatably mounted on the pin shaft (127); a hook (1281) for use with the slots (1231) is provided at the free end of the swing arm (128); the hook (1281) realizes the up and down displacement of the transmitting coil limit block (124) by unidirectional cyclic multi-point displacement in the slots (1231).

5. The easily disassembled limb joint magnetic resonance coil fixing structure as claimed in claim 4, characterized in that: A cover plate (129) with a shape matching the limit device body (122) is detachably mounted on the rear side surface of the limit device body (122); a side of the cover plate (129) facing the guide groove (1221) is provided with an avoidance groove (1291) for avoiding the swing arm (128); a bottom surface of the transmitting coil limit block (124) is hollowed out to provide an avoidance cavity (1241); the top end of the slider (123) is fixedly mounted in the avoidance cavity (1241); the length of the avoidance cavity (1241) is greater than the top length of the limit device body (122); and the width of the avoidance cavity (1241) is greater than the total top width of the limit device body (122) and the cover plate (129) combined together.

6. The easily disassembled limb joint magnetic resonance coil fixing structure according to claim 1, characterized in that: The front-end limiting device (11) is a limiting ring, on which a limiting protrusion (111) is provided, and the front end of the transmitting coil (2) is provided with a limiting recess (26) that matches the limiting protrusion (111), and when the limiting recess (26) and the limiting protrusion (111) are meshed together, the rear-end limiting component (12) locks the transmitting coil (2) in the magnet detection hole (1).

7. The easily disassembled limb joint magnetic resonance coil fixing structure according to any one of claims 1 to 6, characterized in that: The receiving coil track bar (31) is a long bar fixedly mounted on the bottom of the outer wall of the receiving coil (3); the cross-sectional shape of the receiving coil track bar (31) is compatible with the cross-sectional shape of the transmitting coil track groove (23); and a receiving coil handle (32) is provided at the rear end of the receiving coil (3).

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