CN212514977U

CN212514977U - Volume coil fixed knot constructs and is used for animal magnetic resonance imaging's volume coil

Info

Publication number: CN212514977U
Application number: CN202021776726.1U
Authority: CN
Inventors: 洪涛; 侯祥明; 邢峣
Original assignee: Wuhan United Imaging Life Science Instrument Co Ltd
Current assignee: Wuhan United Imaging Life Science Instrument Co Ltd
Priority date: 2020-08-21
Filing date: 2020-08-21
Publication date: 2021-02-09
Anticipated expiration: 2030-08-21

Abstract

The utility model provides a volume coil fixing structure, which comprises a first end cover, wherein the first end cover is detachably arranged at one end of a shell of the volume coil, and the outer diameter of the first end cover is equal to that of the shell; fastening components, fastening components install in first end cover, fastening components includes at least one fastening unit, each fastening unit includes moving member and fastener, the fastener is used for the drive the moving member at least partial salient in the periphery of first end cover, the utility model discloses a volume coil fixed knot constructs can realize the reliable installation of volume coil in gradient coil, the utility model also provides a volume coil for animal magnetic resonance imaging.

Description

Volume coil fixed knot constructs and is used for animal magnetic resonance imaging's volume coil

Technical Field

The utility model relates to an animal high-field magnetic resonance imaging technical field, concretely relates to volume coil fixed knot constructs and is used for animal magnetic resonance imaging's volume coil.

Background

The animal high-field magnetic resonance imaging system is an important tool for new drug research and development and basic research of life science, and a special volume coil is required to be arranged in an animal high-field magnetic resonance imaging experiment to generate a radio-frequency signal with high signal-to-noise ratio and good uniformity. Because high-field animal magnetic resonance imaging system need be directed against the different grade type, the animal of different size is tested, therefore the system disposes the volume coil of different size specifications, and this has proposed very high requirement to the reliability of volume coil structure, the convenience of dismouting.

The existing volume coil for high-field magnetic resonance imaging of animals needs to be fixed in a gradient coil, and due to process limitation, the inner wall of the gradient coil is a continuous cylindrical surface, structures such as boss positioning, screw fixing and the like cannot be provided for the volume coil, the volume coil can only be fixed on the smooth inner wall of the gradient coil, and currently, an inflatable air bag is generally adopted to fix the volume coil in the gradient coil, but on one hand, the air bag has the problem of natural air leakage, and air needs to be supplemented after a period of time; on the other hand, the air bag is easy to age or scratch or even break, the reliability is difficult to guarantee, and the maintenance is also difficult.

SUMMERY OF THE UTILITY MODEL

The utility model provides a volume coil fixed knot constructs for animal high-field magnetic resonance imaging, it has adopted a mechanical structure in order to realize the installation of volume coil in gradient coil.

The utility model provides a scheme as follows of above-mentioned technical problem: a volume coil fixation structure for magnetic resonance imaging of an animal, comprising:

a first end cap; the first end cover is used for being installed at one end of a shell of the volume coil, and the outer diameter of the first end cover is equal to that of the shell;

the fastening assembly is arranged on the first end cover and comprises at least one fastening unit, each fastening unit comprises a moving part and a fastening part, and the fastening part is used for driving the moving part to at least partially protrude out of the periphery of the first end cover.

The utility model provides a volume coil, through fastener drive moving member at least partial salient in the periphery of first end cover, when this volume coil installs gradient coil inside, the inner wall of the partial butt gradient coil of moving member salient first end cover to guarantee the fixed mounting of volume coil, ensure to fix volume coil inside gradient coil.

The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings. The detailed description of the present invention is given by the following examples and the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:

fig. 1 is a schematic view of an installation structure of a volume coil and a gradient coil according to an embodiment of the present invention;

fig. 2 is a schematic perspective view of a volume coil fixing structure and a volume coil fixing structure for animal magnetic resonance imaging according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of a first embodiment of the fastening unit of FIG. 2 according to the present invention;

FIG. 4 is a schematic structural view of a second embodiment of the fastening unit of FIG. 2 according to the present invention;

FIG. 5 is a schematic structural view of a third embodiment of the fastening unit of FIG. 2 according to the present invention;

FIG. 6 is a schematic view of the shock absorbing assembly of FIG. 2 according to the present invention;

fig. 7 is a schematic perspective view of a volume coil for animal magnetic resonance imaging according to another embodiment of the present invention.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention. The invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become more fully apparent from the following description and appended claims. It should be noted that the drawings are in simplified form and are not to precise scale, and are provided for convenience and clarity in order to facilitate the description of the embodiments of the present invention.

Example one

As shown in fig. 1 and 2, the present invention provides a volume coil fixing structure 10 for animal magnetic resonance imaging, which comprises a first end cap 2 and a fastening component 3.

In this case, for the purpose of understanding the function and the installation position of the first end cap 2, the concept of a housing 1 for a volume coil and a gradient coil 200 is introduced in this embodiment, wherein the first end cap 2 is intended to be detachably mounted at one end of the housing 1. The housing 1 of the volume coil is cylindrical, the first end cap 2 is cylindrical as a whole, and one end of the first end cap 2 connected to the housing 1 of the volume coil has a boss shape and is engaged with the housing 1 of the volume coil. In one embodiment, the outer diameter (i.e., the outer circumferential diameter) of the first end cap 2 is the same as the outer diameter of the housing 1, facilitating the volume coil to enter the gradient coil cavity and secure. The inner diameter of the first end cover 2 is the same as that of the shell 1, so that the test animal can conveniently enter and exit the volume coil.

The fastening assembly 3 is mounted on the first end cap 2, the fastening assembly 3 comprises at least one fastening unit 31, each fastening unit 31 comprises a moving member 311 and a fastening member 312, and the fastening member 312 is used for driving the moving member 311 to at least partially protrude out of the outer periphery of the first end cap 2; when the volume coil 100 with the volume coil fixing structure 10 is installed in the gradient coil 200, the portion of the moving member 311 protruding out of the first end cap 2 abuts against the inner wall of the gradient coil 200 to ensure the fixed installation of the volume coil and to ensure the volume coil is fixed inside the gradient coil 200.

In one embodiment, the volume coil fixing structure 10 further includes support members 4, portions of the support members 4 protrude from the outer circumference of the first end cap 2, and the sum of the number of the support members 4 and the number of the fastening units 31 is not less than three. Through the combined action of the supporting component and the fastening unit, the installation stability of the volume coil is ensured. In one embodiment, the support member 4 is a gimbaled ball that is freely rotatably mounted to the outer periphery of the first end cap 2.

The sum of the number of the support assemblies 4 and the number of the fastening units 31 is not less than three, so that at least three-point fixation is realized when the first end cover 2 and the gradient coil 200 are installed. Preferably, the fastening assembly 3 includes only one fastening unit 31, and the number of the universal balls is not less than two. The fastening assembly only comprises one fastening unit, so that the operation can be reduced, the adjustment is convenient, and the installation is simple. In an embodiment of the present invention, the fastening units 31 and the universal balls are uniformly spaced along the periphery of the first end cap 2, so that the first end cap 2 is uniformly stressed when being mounted, and each part of the outer peripheral surface of the first end cap 2 can be kept stable in the gradient coil 200. More preferably, the fastening member 3 includes only one fastening unit 31, and the number of the supporting members 4 is two. The 2 universal balls together with the 1 fastening unit 31 achieve a three-point fastening.

In another embodiment of the present application, the volume coil fixing structure 10 further comprises a second end cap 5 and a shock-absorbing assembly 6, and the shock-absorbing assembly 6 may adopt an air cushion or other fluid structure. Preferably, in this embodiment, the shock absorbing assembly is of a mechanical structure.

In one embodiment of the present application, the first end cap 2 is adapted to be mounted to one end of the housing 1 of the volume coil, and the second end cap 5 is adapted to be mounted to the other end of the housing 1. At least three hole position grooves 5a are formed on the periphery of the second end cover 5, and the shock absorption assemblies 6 are correspondingly arranged in the hole position grooves 5a one to one. The shock absorption assembly 6 is of a spring plunger structure. Specifically, each of the shock absorbing assemblies 6 comprises a compression spring 61 and a ball 62, the ball 62 is movably mounted in the hole slot, and the compression spring 61 is used for pushing a part of the ball out of the hole slot 5 a. With the damping assembly 6 of the present application, the volume coil 100 can be effectively fixed and damped simultaneously. Through first end cover and second end cover use in the cooperation of volume coil both ends, prevent to take place to rock, guarantee fixed effect to reduce vibrations.

Wherein, because the compression spring 61 pushes the part of the ball 62 out of the hole position slot 5a, when the volume coil comprising the second end cap 5 and the damping assembly 6 is installed in the gradient coil 200, the ball 62 protrudes out of the hole position slot 5a under the elastic force of the compression spring 61 and abuts against the inner wall of the gradient coil 200. Due to the existence of the compression spring 61, the damping effect can be effectively achieved, and the stability of the volume coil in the gradient coil 200 is further enhanced.

Specifically, in this embodiment, including at least three damper 6, its edge second end cover 5's circumference evenly distributed in second end cover 5's periphery, the damper simple structure of this application uses reliably, uses with fastening components 3 cooperation, and is fixed effectual with the shock attenuation. In order to facilitate the installation of the compression spring 61 and the ball 62, the shock absorbing assembly 6 further comprises a housing 63, wherein the housing 63 is installed in the hole slot 5a and has a cavity 63a formed therein, the outward side of the housing 63 is open, the compression spring 61 is installed between the bottom of the cavity 63a and the ball 62, the diameter of the opening of the housing 63 is smaller than the diameter of the ball 62, and the spring 61 elastically drives the portion of the ball 62 to protrude out of the housing 63.

The damping assembly 6 adopting the spring plunger structure can realize pre-positioning during installation of the volume coil, meanwhile, due to the existence of the spring 61, a certain damping effect can be realized, and at least three spring plungers realize three-point type fixation on one side of the second end cover 5. The number of the spring plungers can be selected and adjusted according to the use condition, and is not limited to three. Preferably, 4 to 6 are used. Adopt a plurality of spring plunger, can reach better shock attenuation and fixed effect.

In some embodiments, the supporting component of the first end cap may also adopt a spring plunger structure, so as to further improve the damping effect of the volume coil 100.

It will be appreciated that the driving of the moving member 311 by the fastening member 312 at least partially protrudes from the outer circumference of the first end cap 2 can be implemented in various ways, such as a cam structure, an eccentric wheel structure, and a screw structure. The fastener 312 drives the moving part 311 to at least partially protrude out of the periphery of the first end cover 2, so that the volume coil is fixed in the gradient coil, the axial space of the end cover is fully utilized, and the problem of insufficient radial space in the end cover is solved. In one embodiment of the application, the volume coil is used for high-field animal magnetic resonance imaging, and the gap between the gradient coil and the volume coil is very small and is only 1-2 mm. Accordingly, the radial moving distance of the moving member is small, and the part of the moving member protruding from the first end cover is small. The difference between the inner and outer radii of the volume coil is only 10 to 15 mm. In one particular embodiment, the volume coil has an inner diameter of: 86mm, the outside diameter of the volume coil is: 112mm and the gradient coil inner diameter is 114 mm. In some embodiments of the present application, it is preferable that the solution is such that by a small moving distance of the moving member, a stable fixation of the volume coil can be achieved.

The first end cap 2 is formed with sliding grooves 2a, the number of the sliding grooves 2a is equal to the number of the fastening units 31, wherein the moving member 311 is a slide block movably mounted on the sliding grooves 2a, and the fastening member 312 is used for driving the slide block to at least partially protrude out of the corresponding sliding groove 2 a.

Preferably, the bottom of the sliding slot 2a has a first inclined surface b1, one end of the slider away from the bottom of the sliding slot 2a is a slider top 3111, the other end is a slider bottom 3112, the slider bottom 3112 has a second inclined surface b2 matching with the first inclined surface b1, the fastener 312 is used for driving the first inclined surface b1 and the second inclined surface b2 to perform relative displacement, the slider moves outwards along the end cover in the radial direction, and the slider top 3111 protrudes out of the sliding slot 2 a.

As a first possible embodiment, the length direction of the sliding groove 2a is the same as the length direction of the housing 1, the height of the first inclined surface b1 near one end of the housing 1 is greater than that of the other end thereof, and a portion of the fastening member 312 abuts against the sliding block to push the sliding block to slide along the first inclined surface b1 to a side near the housing 1, so that the sliding block top 3111 protrudes out of the sliding groove 2 a.

Due to the existence of the first inclined surface b1 and the second inclined surface b2, when the fastener 312 pushes the slider to slide along the first inclined surface b1 to a side close to the housing 1, the slider as a whole gradually rises along the first inclined surface b1, so that the slider top 3111 rises and protrudes in the corresponding slide groove 2 a.

More specifically, the fastening member 312 is a threaded rod including a rod body 3121 and a push portion 3122, which may be integrally formed with the rod body. The rod body one end has the screw thread, the promotion portion is located the other end of the rod body, spout 2a is kept away from the one end opening of casing 1, and the other end is formed with a thread groove 2 b. The slider is provided with a mounting hole 311a along the length direction of the sliding slot 2a, the end of the rod 3121 with threads passes through the mounting hole and is connected to the thread groove 2b with threads, the pushing portion 3122 is located at the other end of the rod 3121, and the end of the pushing portion 3122 close to the shell 1 is movably abutted against the slider. The opening of the shell is used for enabling the threaded rod to enter the sliding groove, the opening form of the shell is not limited, the opening form can be the opening form shown in the drawing, and the opening form can also be a hole form, so long as the threaded rod can freely enter the sliding groove, penetrate through the mounting hole and be in threaded connection with the threaded groove.

It is understood that, in order to ensure that the push portion 3122 can effectively push the slider, the outer diameter of the push portion 3122 is larger than the diameter of the mounting hole 311 a. In addition, in order to ensure that the slider does not interfere with the rod body 3121 during movement, the diameter of the mounting hole 311a is larger than the outer diameter of the rod body 3121 of the threaded rod. In order to ensure that the slide block can move along the radial direction, the shape of the mounting hole can be waist-shaped.

Preferably, a terminal step a1 is formed at one end of the first inclined surface b1 away from the housing 1 and extends outwards along the length direction of the rod 3121, a limiting protrusion 23 is connected to the terminal step a1, and the terminal step a1 and the limiting protrusion 23 can effectively limit the sliding distance of the slider to the outer end, so as to prevent the slider from sliding out of the outer end of the sliding groove 2b and falling off the end cover 2. The end step and the stopper protrusion may be of an integral structure, may be a portion of a side surface of the first end cap, and may be integrally formed with the first end cap.

Preferably, wherein the threaded rod uses the copper screw rod of no magnetism, corresponds the hot melt nut of installation no magnetism on the end cover 2, and this hot melt nut embeds in advance and is fixed in thread groove 2b, and when threaded rod threaded connection was on end cover 2, it formed the metal screw-thread fit with hot melt nut, guaranteed the fastening force of screw thread, prevented that threaded connection between the two loosens, increased life simultaneously.

When the volume coil with the fixed structure of the first embodiment is installed, the threaded rod can be rotated first, so that the top 3111 of the sliding block is not higher than the opening of the sliding groove 2b, i.e. the top of the sliding block does not protrude out of the periphery of the first end cover; then insert the volume coil in gradient coil 200, rotatory threaded rod, promotion portion 3122 promotes the slider and moves to being close to casing one side, and the height of slider top 3111 in spout 2b becomes high gradually simultaneously, and the slider moves along end cover axial and radial, and the slider top is outstanding in the periphery of first end cover, and until slider top 3111 and the inner wall butt of gradient coil 200 are fixed. Because the threaded rod and the threaded groove 2b are in threaded connection, when the volume coil 100 is not rotated, the pushing portion 3122 and the end cap 2 can be effectively prevented from relative displacement, and thus the volume coil 100 is stably mounted inside the gradient coil 200.

As a second possible embodiment, the structure is substantially the same as that of the first embodiment, namely, the height of the first inclined surface b1 at one end close to the casing 1 is greater than that at the other end, and the fastening member 312 is a threaded rod, except that the sliding groove 2a has a blocking piece 21 at one end far from the casing 1, the blocking piece 21 has a threaded hole 21a formed thereon, and the threaded rod is threaded in the threaded hole 21a and has one end movably abutting against the sliding block. In this embodiment, the blocking piece 21 may be a part of the side wall of the end cap, and may be integrally formed with the end cap, or may be fixedly connected to the side surface of the end cap.

In one embodiment, the sliding block is formed with a concave mounting groove 311b along the length direction of the sliding slot 2a, one end of the threaded rod extends into the mounting groove 311b, and the end of the threaded rod movably abuts against the bottom of the mounting groove 311 b. Through setting up the mounting groove, can prevent that the slider from falling out from the department of spout 2a, can also make slider atress position retrusion, central atress, the stability that the reinforcing slider removed.

It can be understood that the slider does not interfere with the mounting slot 311b and the threaded rod during movement, and the mounting slot 311d has a larger diameter than the outer diameter of the threaded rod. In order to ensure that the slide block can move along the radial direction, the mounting groove can be shaped like a kidney.

When the volume coil with the fixed structure of the second embodiment is installed, the threaded rod can be rotated first, so that the top 3111 of the slider is not higher than the opening of the chute 2 b; then insert the volume coil in gradient coil 200, rotatory threaded rod, the relative separation blade 21 of threaded rod along the axial rotation translation of threaded rod, and the slider motion is pushed when the threaded rod tip touches the slider, and the height of slider top 3111 in spout 2b becomes high gradually simultaneously, and the slider is along end cover axial and radial motion, and the inner wall butt of slider top 3111 and gradient coil 200 is fixed. Because the threaded rod is in threaded connection with the threaded hole 21a, when the volume coil 100 is not rotated, the pushing portion 3122 and the baffle 21 can be effectively prevented from relative displacement, and the volume coil 100 is ensured to be stably mounted inside the gradient coil 200.

In both the first and second embodiments, the protrusion of the top 3111 of the slider from the corresponding sliding slot 2a is achieved by pushing the slider to move on the first inclined surface b1, wherein during the movement of the slider, there is both a displacement along the length direction of the sliding slot 21a and a displacement along the depth direction of the sliding slot 2a, i.e. the slider moves along the axial and radial directions of the end cover, and the moving member at least partially protrudes from the outer periphery of the first end cover, thereby ensuring that the volume coil is stably mounted in the gradient coil. It can be understood that the length direction of the sliding chute of the present application is along the axial direction of the volume coil housing and the end cover, the depth direction of the sliding chute is along the radial direction of the end cover, and the length direction and the depth direction of the sliding chute do not limit the size of the sliding chute.

As a third embodiment, referring to fig. 2 and 5, the fastening member 312 is a threaded rod, a wedge 22 is movably mounted in the sliding slot 2a, the first inclined surface b1 is formed on the top of the wedge 22, the height of one end of the first inclined surface b1 close to the casing 1 is smaller than that of the other end thereof, the bottom 3112 of the sliding block is fittingly mounted on the top of the wedge 22, a stopper 21 is connected to one end of the sliding slot 2a far from the casing 1, a threaded hole 21a is formed in the stopper 21, the threaded rod is threadedly connected to the threaded hole 21a, and one end of the threaded rod movably abuts against the wedge 22. In this embodiment, the blocking piece 21 may be a part of the side wall of the end cap, and may be integrally formed with the end cap, or may be fixedly connected to the side surface of the end cap.

In one embodiment, a protrusion 3113 is formed on a side of the slider bottom 3112 adjacent to the blocking plate 21, a connection hole 311c is formed on the protrusion 3113 along a length direction of the sliding groove 2a, the threaded rod is disposed through the connection hole 311c, the second inclined surface b2 is formed on the slider bottom 3112, and the second inclined surface is located on a side of the protrusion 3113 adjacent to the housing 1. Through setting up the lug, can prevent that slider and voussoir from falling out from the open-top department of spout 2a, the stability that reinforcing slider and voussoir removed. It will be appreciated that the tab may be integrally formed with the slider.

It will be appreciated that, in order to ensure that the slider does not interfere with the connection hole 311c and the threaded rod during movement, the hole diameter of the connection hole 311c is larger than the outer diameter of the threaded rod. In order to ensure that the sliding block can move along the radial direction, the connecting hole can be shaped like a waist. When the volume coil with the fixed structure of the third embodiment is installed, the threaded rod can be rotated first, so that the top 3111 of the sliding block is not higher than the opening of the sliding chute 2 b; then insert the volume coil 200 in, the rotatory threaded rod, the threaded rod is rotatory translation along the length direction of threaded rod relative separation blade 21, when the end of threaded rod contacts the voussoir 22, can drive voussoir 22 forward motion together, because first inclined plane b1 and second inclined plane b2 mutually support, voussoir 22 jack-up slider makes the height of slider top 3111 in spout 2b rise gradually and outstanding spout 2b, until slider top 3111 and the inner wall butt of gradient coil 200 are fixed, because threaded rod and separation blade 21 are threaded connection, when the irrotation, can effectively prevent to take place the displacement between threaded rod and the end cover 2, and then guaranteed that volume coil 100 stably installs inside gradient coil 200.

In this embodiment, the sliding block is pushed to move along the end cover in the radial direction by the axial movement of the wedge block, and the moving part at least partially protrudes out of the outer periphery of the first end cover, so that the volume coil is ensured to be stably installed in the gradient coil.

In the embodiment of the present invention, the angle of the first inclined surface b1 is preferably selected to be smaller, and more preferably, between 10 ° and 30 °. The clearance between volume coil and the gradient coil is less, and the lead angle is too big, and the threaded rod number of turns is too little, and the stroke is too little, adjusts inconveniently, is difficult to form stable fixed force. The lead angle of 10 degrees to 30 degrees, the self-locking performance of the bottom 3112 of the sliding block and the first inclined surface b1 is good, and the sliding block is not easy to slide down along the first inclined surface b 1. Moreover, the first end cover has limited space, the gap between the first end cover and the gradient coil is small, and a small lead angle can adapt to a small installation space.

In one embodiment of the present invention, the slider is preferably made of POM material, which has high wear resistance. In a preferred embodiment of the present invention, the end surface of the slider top 3111 is an arc surface, and the arc diameter of the arc surface matches with the inner diameter of the gradient coil. The increase area of contact that the arcwall face can be fine guarantees that slider top 3111 and gradient coil 200's inner wall has better contact to guarantee butt stability, reinforcing axial fixity effect. More preferably, the top 3111 of the slider is provided with an elastic pad, such as a rubber pad or a silicone pad, which can increase the friction between the top 3111 of the slider and the inner wall of the gradient coil 200, enhance the axial fixing effect, and also have a good shock absorption effect.

With the above structure, the fastener 312 drives the moving member 311 to at least partially protrude from the outer periphery of the first end cap 2, so as to fix the volume coil in the gradient coil, thereby fully utilizing the small gap between the gradient coil and the volume coil, and overcoming the problem of insufficient radial space in the end cap. The fastener drives the first inclined plane and the second inclined plane to generate relative displacement through rotary motion, so that the top of the sliding block protrudes out of the sliding groove, the axial space of the end cover is fully utilized, and the problem of insufficient radial space is solved. And because the clearance between the gradient coil and the volume coil is very small, the radial moving distance of the moving part is very small, and the part of the moving part protruding out of the first end cover is very small, thereby realizing the stable fixation of the volume coil.

Example two

The present embodiment provides a volume coil 100 for animal magnetic resonance imaging, which comprises a housing 1 and the above-mentioned volume coil fixing structure 10;

the shell 1 is hollow and cylindrical, an electric circuit is arranged in the shell, the first end cover 2 and the second end cover 5 are detachably mounted at two ends of the shell 1 respectively, and through holes are formed in the middle of the first end cover 2 and the middle of the second end cover 5 corresponding to end openings of the shell 1. The first end cover 2 and the second end cover 5 are cylindrical on the whole, and the inner diameter and the outer diameter of the first end cover 2 and the second end cover 5 are matched with the inner diameter and the outer diameter of the shell of the volume coil. Specifically, the first and

second end caps

2 and 5 have an inner diameter equal to the inner diameter of the housing and an outer diameter equal to the outer diameter of the housing.

The first end cover 2 is provided with a plurality of adjusting components 7, and the adjusting components can be used for tuning and adjusting the electrical structure of the volume coil 100 and can also be used for adjusting the fixed structure of the volume coil. In one embodiment, the adjustment assembly 7 includes a fixed rod 71, a coupler 72, an adjustment rod 73, and a knob 74. The fixing rod 71, the coupling 72, the adjusting rod 73 and the knob 74 are connected in sequence. The fixing rod 71 is installed on the first end cover 2 and arranged along the length direction of the shell 1, the adjusting rod 73 is coaxially connected to one end, far away from the end cover 2, of the fixing rod 71 through the coupler 72, and the knob 74 is arranged at one end, far away from the coupler 72, of the adjusting rod 73. The adjusting component is used for tuning and adjusting the electrical structure of the volume coil, and a fixing rod of the adjusting component is connected with the internal circuit structure of the volume coil shell.

An adjustment assembly for adjustment of the fixed structure described above, the adjustment assembly being connected to the fastening assembly, in one embodiment, the fixed rod of the adjustment assembly being connected to the fastener of the fastening assembly. Specifically, the fixing rod is directly connected with the threaded rod. In another embodiment, the fixing rod may be integrally formed with a threaded rod, the coupling being mounted at the end of the threaded rod remote from the first end cap 2. During installation of the volume coil, adjustment of the volume coil securing structure 10 is accomplished by turning the knob 74. It will be appreciated that the adjustment assembly for adjustment of the fixed arrangement described above is not limited to the arrangement described above, as long as adjustment of the threaded rod is possible. In one embodiment, the adjustment assembly for adjusting the fixed structure may be a rod member connected to a threaded rod for adjustment.

The utility model discloses a volume coil that embodiment provided, as shown in fig. 1 and 7, when volume coil 100 installed gradient coil 200 inside, it is fixed to guarantee the installation of first end cover 2 one side through fastening components 3 and supporting components 4, guarantee the stability of second end cover 5 one side through damper assembly 6, and then make volume coil 100 stably be fixed in inside gradient coil 200, and above-mentioned structure simple installation, it is reliable, the shock attenuation is effectual, can use at toy magnetic resonance imaging equipment.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way; the present invention can be smoothly implemented by those skilled in the art according to the drawings and the above description; however, those skilled in the art should understand that changes, modifications and variations made by the above-described technology can be made without departing from the scope of the present invention, and all such changes, modifications and variations are equivalent embodiments of the present invention; meanwhile, any changes, modifications, evolutions, etc. of the above embodiments, which are equivalent to the actual techniques of the present invention, still belong to the protection scope of the technical solution of the present invention.

Claims

1. A volume coil fixing structure, comprising:

a first end cap; the first end cover is used for being installed at one end of the shell of the volume coil;

2. The volume coil fixing structure according to claim 1, further comprising at least one support member, wherein a portion of the support member protrudes from an outer circumference of the first end cap, and a sum of the number of the support members and the number of the fastening units is not less than three.

3. A volume coil fixing structure according to claim 2, wherein the fastening member includes only one fastening unit, and the number of the supporting members is two.

4. A volume coil fixing structure according to claim 2, wherein the support member is a gimbaled ball, and the fastening units and the support member are evenly spaced along the periphery of the first end cap.

5. A volume coil fixing structure according to claim 1, further comprising a second end cap and a damper assembly provided to the second end cap, the second end cap being adapted to be mounted to the other end of the housing of the volume coil.

6. A volume coil fixing structure according to claim 5, wherein the damping member is a spring plunger including a compression spring and a ball, the compression spring for urging a portion of the ball out of the outer periphery of the second end cap.

7. A volume coil fixing structure according to any one of claims 1 to 6, wherein the first end cap has sliding grooves formed thereon, the number of the sliding grooves is equal to that of the fastening units, the moving member is a sliding block movably mounted in the sliding groove, the bottom of the sliding groove has a first inclined surface, one end of the sliding block away from the bottom of the sliding groove is a top of the sliding block, the other end of the sliding block is a bottom of the sliding block, the bottom of the sliding block has a second inclined surface matching with the first inclined surface, and the fastening member is configured to drive the first inclined surface and the second inclined surface to displace relative to each other, so that the top of the sliding block protrudes out of the sliding groove.

8. A volume coil fixing structure according to claim 7, wherein the fastener drives the first and second inclined surfaces to displace relative to each other by a rotational movement so that the top of the slider protrudes from the slide slot.

9. A volume coil fixing structure according to claim 8, wherein the length direction of the sliding groove is the same as the length direction of the housing, and the height of the first inclined surface is greater at one end close to the housing than at the other end; the fastener is a threaded rod, the threaded rod includes the body of rod and promotion portion, body of rod one end has the screw thread, promotion portion is located the other end of the body of rod, the spout is kept away from the one end opening of casing, the other end are formed with a thread groove, the slider is followed the length direction of spout is formed with a mounting hole, the threaded rod has the screwed one end and passes mounting hole and threaded connection in the thread groove, promotion portion is close to the one end butt of casing the slider.

10. A volume coil fixing structure according to claim 7, wherein the fastening member is a threaded rod, the sliding slot is movably mounted with a wedge, the first inclined surface is formed on the top of the wedge, and the height of one end of the first inclined surface close to the casing is smaller than that of the other end of the first inclined surface, the bottom of the sliding block is fittingly mounted on the top of the wedge, the end of the sliding slot far from the casing is provided with a catch, the catch is formed with a threaded hole, the threaded rod is threadedly connected to the threaded hole, and one end of the threaded rod is movably abutted to the wedge.

11. The volume coil fixing structure according to claim 1, wherein the volume coil fixing structure is used for fixing the volume coil in a gradient coil, and the surface of the moving member, which is in contact with the gradient coil, is an arc-shaped surface; and an elastic pad is arranged on the contact surface of the moving piece and the gradient coil.

12. A volume coil for magnetic resonance imaging of an animal, wherein the volume coil comprises a housing and a volume coil fixation structure as claimed in any one of claims 1 to 11.

13. The volume coil for animal magnetic resonance imaging according to claim 12, wherein the housing is hollow cylindrical, the first end cap is mounted at one end of the housing, and a through hole is formed in the middle of the first end cap; the inner diameter of the first end cover is matched with the inner diameter of the shell of the volume coil; the outer diameter of the first end cover is matched with the outer diameter of the shell of the volume coil.

14. The volume coil for animal magnetic resonance imaging according to claim 12, wherein a plurality of adjustment assemblies are mounted on said first end cap, at least one of said adjustment assemblies being adapted for adjustment of said volume coil mounting structure.