CN210401636U - Self-damping rotating device for magnetic resonance coil and head coil assembly - Google Patents

Abstract

The utility model relates to a magnetic resonance equipment technical field especially relates to a self damping rotating device and head coil assembly for magnetic resonance coil, wherein self damping rotating device includes: the connecting shaft is used for realizing the rotary connection between two parts respectively provided with a first connecting hole and a second connecting hole; and the elastic damping structure is fixed in the second connecting hole along the axial direction of the connecting shaft, and the part of the elastic damping structure extends into the first connecting hole, and the connecting shaft can apply pressing force on the elastic damping structure, so that the elastic damping structure deforms, and the contact friction force between the elastic damping structure and the hole wall of the first connecting hole and between the elastic damping structure and the hole wall of the second connecting hole is increased. The utility model discloses a from damping rotating device through adopting the reliable pure structure damping design of simple structure, realizes rotating the damping effect between two parts of connection, can be applicable to under the abominable magnetic resonance environment, and does not influence magnetic resonance coil's signal transmission, guarantees the imaging quality.

Description

Self-damping rotating device for magnetic resonance coil and head coil assembly

Technical Field

The utility model relates to a magnetic resonance equipment technical field especially relates to a self damping rotating device and head coil assembly for magnetic resonance coil.

Background

At present, the rotary connection between two components is usually realized by connecting shafts respectively passing through connecting holes arranged on the two components. In order to achieve an adjustable positioning of the relative rotational angle between the two parts, a damping structure is provided at the rotational connection of the two parts. The damping structure between two parts for rotary connection is formed by forming a damping cavity at the rotary connection position of the two parts, and the damping cavity is filled with damping liquid or damping oil. The damping structure with the structure is complex in structure, and is not suitable for severe magnetic resonance environment, and the risk of leakage of the damping liquid can be avoided.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a self-damping rotating device for a magnetic resonance coil and a head coil assembly, which are directed to the above technical problems of the conventional rotating structure.

A self-damped rotation device for a magnetic resonance coil, comprising:

the connecting shaft is used for realizing the rotary connection between two parts respectively provided with a first connecting hole and a second connecting hole; and

the elastic damping structure is fixed in the second connecting hole along the axial direction of the connecting shaft, the part of the elastic damping structure extends into the first connecting hole, the connecting shaft can apply pressing force on the elastic damping structure, the elastic damping structure is deformed, and accordingly contact friction force between the elastic damping structure and the hole wall of the first connecting hole and between the elastic damping structure and the hole wall of the second connecting hole is increased.

In one embodiment, the pressing knob is connected to the connecting shaft in a threaded manner, the pressing knob can be abutted to a portion of the elastic damping structure extending into the first connecting hole, the connecting shaft can rotate relative to the elastic damping structure, the connecting shaft can drive the pressing knob to move axially when rotating, and when the pressing knob is driven by the connecting shaft to move towards the elastic damping structure, the pressing knob applies gradually-increasing pressing force to the elastic damping structure.

In one embodiment, the elastic damping structure comprises a damping sleeve, the damping sleeve is sleeved outside the connecting shaft, one end of the damping sleeve is axially fixed in the second connecting hole, the other end of the damping sleeve extends into the first connecting hole, and the pressing knob can be abutted against one end, extending into the first connecting hole, of the damping sleeve.

In one embodiment, the pressing knob comprises a matching portion and a connecting column which are connected, the matching portion is in sliding fit with the first connecting hole, one end, far away from the matching portion, of the connecting column is used for being abutted to the damping sleeve, a containing hole is formed in one end, close to the pressing knob, of the damping sleeve and used for being matched with the connecting column, and the aperture of the containing hole is slightly smaller than the outer diameter of the connecting column.

In one embodiment, the self-damping rotating device further comprises a compression spring which is sleeved outside the connecting column, and two ends of the compression spring are respectively abutted against the matching part and the damping sleeve.

In one embodiment, a first limiting structure is arranged between the matching part and the inner wall of the first connecting hole, and the first limiting structure is used for limiting the pressing knob to move only along the axial direction of the first connecting hole.

In one embodiment, the first limiting structure comprises a sliding groove and a sliding block, the sliding groove is axially arranged on the inner wall of the first connecting hole, the sliding block is arranged on the matching portion corresponding to the sliding groove, and the sliding block is slidably arranged in the sliding groove.

In one embodiment, the first connecting hole is disposed on the first member, the second connecting hole is disposed on the second member, the second member is provided with a groove, the first member is inserted into the groove, so that the first connecting hole is coaxial with the second connecting hole, the connecting shaft is axially fixed on the second member and penetrates through the first connecting hole and the second connecting hole, the second connecting hole comprises a mounting hole and a shaft hole which are communicated, the diameter of the mounting hole is larger than that of the shaft hole, the mounting hole is close to the first connecting hole, and the elastic damping structure is mounted in the mounting hole and partially extends into the first connecting hole.

In one embodiment, the connecting shaft comprises a positioning part and a shaft part which are connected, the diameter of the second connecting hole is larger than the outer diameter of the shaft part and smaller than the outer diameter of the positioning part, one end, far away from the positioning part, of the shaft part is inserted into the first connecting hole from one end of the second connecting hole, and one end, far away from the positioning part, of the shaft part is axially fixed with the second component through a second limiting structure; the second limiting structure comprises an annular limiting groove and a limiting block, the annular limiting groove is formed in the shaft portion, and the limiting block is installed on the second part and the part of the limiting block can be clamped in the annular limiting groove.

A head coil assembly comprising:

a coil body forming a cavity having an accommodation space; and

the mirror holder is equipped with the mirror surface, and the mirror surface can receive the outside light of cavity to with light reflection to the cavity in, the mirror holder passes through the base and the support frame is connected on the coil body, the pedestal mounting is in the coil body, the support frame rotationally connects on the base, the mirror holder rotationally connects on the support frame, between mirror holder and the support frame and/or between support frame and the base, realize rotating the connection through the self-damping rotating device who is used for magnetic resonance coil among the above arbitrary embodiment.

The beneficial effects of the utility model include:

the elastic damping structure is pressed by the connecting shaft to be deformed, so that the contact friction force between the elastic damping structure and the hole wall of the first connecting hole and between the elastic damping structure and the hole wall of the second connecting hole can be increased. Thereby achieving a damping effect between the two parts of the rotary connection. This with neotype self damping rotating device, adopt the simple structure reliable pure structure damping design, can be applicable to under the abominable magnetic resonance environment, and can not influence magnetic resonance coil's signal transmission, guarantee the imaging quality.

Drawings

Fig. 1 is a schematic structural diagram of a self-damping rotating device for a magnetic resonance coil according to an embodiment of the present invention (a compression spring is in a compressed state);

fig. 2 is a schematic structural diagram of a self-damping rotating device for a magnetic resonance coil according to an embodiment of the present invention (a compression spring is in a return state);

FIG. 3 is an exploded view of the structure shown in FIG. 2;

FIG. 4 is a schematic view of the construction of the connection shaft in the construction of FIG. 3;

FIG. 5 is a schematic view of the compression knob of the structure shown in FIG. 3;

FIG. 6 is a schematic view of the damping sleeve in the configuration shown in FIG. 3;

fig. 7 is a schematic view of the arrangement of fig. 1 applied between a frame and a support;

FIG. 8 is a schematic view of the arrangement of FIG. 1, between the frame and the stand, and between the stand and the base;

fig. 9 is a schematic structural diagram of a head coil assembly according to an embodiment of the present invention.

Description of reference numerals:

10-a first component; 101-a first connection hole;

20-a second component;

201-a second connection hole; 211-mounting holes; 221-shaft hole;

30-a coil body;

40-a frame;

50-a base;

60-a support frame;

100-a connecting shaft;

110-a positioning section; 120-shaft part;

200-an elastic damping structure;

210-a damping sleeve;

220-a receiving hole;

300-a compression knob;

310-a mating portion;

320-connecting column;

400-compression spring;

500-a first limit structure;

510-a chute; 520-a slider;

600-a second limit structure;

610-annular limiting groove; 620-limiting block.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the following is a detailed description of the self-damping rotating device for a magnetic resonance coil according to the present invention with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Referring to fig. 1 to 3, a self-damping rotating device for a magnetic resonance coil according to an embodiment of the present invention includes a connecting shaft 100 and an elastic damping structure 200. The connecting shaft 100 is used to realize rotational connection between two members provided with the first connecting hole 101 and the second connecting hole 201, respectively. The elastic damping structure 200 is fixed in the second connection hole 201 in the axial direction of the connection shaft 100 and partially protrudes into the first connection hole 101. The connection shaft 100 can apply pressing force to the elastic damping structure 200, so that the elastic damping structure 200 is deformed, thereby increasing contact friction between the elastic damping structure 200 and the hole walls of the first connection hole 101 and between the elastic damping structure 200 and the hole walls of the second connection hole 201.

The elastic damping structure 200 refers to a damping structure having a certain elastic deformation capability under an external force, and is generally a damping structure made of an elastic material. Meanwhile, since the elastic damping structure 200 is provided in two members rotatably connected, it is preferable to use a wear-resistant material. The elastic damping structure 200 is deformed by applying pressing force to the elastic damping structure 200 through the connection shaft 100, whereby contact friction between the elastic damping structure 200 and the hole walls of the first connection hole 101 and between the elastic damping structure 200 and the hole walls of the second connection hole 201 can be increased. Thereby achieving a damping effect between the two parts of the rotary connection. Meanwhile, the damping between the two rotatably connected components can be adjusted or constant according to the adjustable or fixed pressing force applied by the connecting shaft 100 to the elastic damping structure 200, and when the pressing force is large to a certain degree, the two components can be locked relatively. The self-damping rotating device of the embodiment adopts a pure-structure damping design with a simple and reliable structure, can be suitable for severe magnetic resonance environment, does not influence signal transmission of a magnetic resonance coil, and ensures imaging quality.

It is understood that the magnitude of the pressing force applied by the connecting shaft 100 to the elastic damping structure 200 may be adjustable. Referring to fig. 1, as an implementable manner, a pressing knob 300 is connected to the connecting shaft 100 in a threaded manner, the pressing knob 300 can abut against a portion of the elastic damping structure 200 extending into the first connecting hole 101, the connecting shaft 100 can rotate relative to the elastic damping structure 200, and the connecting shaft 100 rotates to drive the pressing knob 300 to move axially. When the pressing knob 300 is moved toward the elastic damping structure 200 by the driving of the connecting shaft 100, the pressing knob 300 applies a gradually increasing pressing force to the elastic damping structure 200. In this embodiment, the pressing knob 300 is driven to move axially by the rotation of the connecting shaft 100, as shown in fig. 1, when the pressing knob 300 moves towards the elastic damping structure 200, the pressing knob 300 applies a gradually increasing pressing force to the elastic damping structure 200, so that the contact friction force between the elastic damping structure 200 and the hole wall of the first connecting hole 101 and between the elastic damping structure 200 and the hole wall of the second connecting hole 201 is gradually increased, and the rotational damping between the two components is increased until the two components are locked relatively. As shown in fig. 2, when the pressing knob 300 is moved away from the elastic damping structure 200, the pressing force applied by the pressing knob 300 to the elastic damping structure 200 is gradually reduced until it disappears, and the rotational damping between the two components is reduced until the two components can freely rotate. Thus, a user can rotate the connecting shaft 100 to adjust the position of the pressing knob 300 according to actual needs, so that a proper damping size can be obtained, and the requirements of rotary connection of two components with different damping sizes can be met.

The elastic damping structure 200 may have various structural forms. Referring to fig. 1, in an embodiment, the elastic damping structure 200 includes a damping sleeve 210, the damping sleeve 210 is sleeved outside the connection shaft 100, one end of the damping sleeve 210 is axially fixed in the second connection hole 201, the other end of the damping sleeve extends into the first connection hole 101, and the pressing knob 300 can abut against one end of the damping sleeve 210 extending into the first connection hole 101. In this embodiment, the damping sleeve 210 is sleeved outside the connecting shaft 100, and the two can rotate and move relatively. When the connecting shaft 100 rotates to drive the pressing knob 300 to move axially, the damping sleeve 210 is positioned in the second connecting hole 201 and correspondingly deformed or restored along with the movement of the pressing knob 300, so that the damping force between the two components can be adjusted. In other embodiments, the elastic damping structure 200 may also include a plurality of damping bars circumferentially distributed outside the connection shaft 100, wherein one end of each damping bar is axially fixed in the second connection hole 201, and the other end of each damping bar extends into the first connection hole 101. The pressing knob 300 may abut with ends of the plurality of damping strips protruding into the first connection hole 101.

Referring to fig. 2 and 3, in one embodiment, the pressing knob 300 includes a matching portion 310 and a connecting column 320 connected, the matching portion 310 is slidably matched with the first connecting hole 101, and one end of the connecting column 320 far from the matching portion 310 is used for abutting against the damping sleeve 210. One end of the damping sleeve 210 close to the pressing knob 300 is provided with a receiving hole 220, the receiving hole 220 is used for matching with the connecting column 320, and the diameter of the receiving hole 220 is slightly smaller than the outer diameter of the connecting column 320. The elastic deformability of the corresponding receiving hole 220 portion of the damping sleeve 210 can be increased by the connecting column 320 and the receiving hole 220 matching therewith. When the pressing knob 300 is driven by the connecting shaft 100 to move towards the direction of the damping sleeve 210, the connecting column 320 can be inserted into the accommodating hole 220, so that the damping sleeve 210 at the accommodating hole 220 is greatly deformed, on one hand, the rotation resistance of the connecting shaft 100 can be reduced, and on the other hand, the contact friction force between the damping sleeve 210 and the first connecting hole 101 and the second connecting hole 201 is easily increased. As shown in fig. 5 and 6, the connection post 320 may be inserted into the receiving hole 220, and a concave-convex structure may be disposed between the connection post 320 and the receiving hole 220 to prevent relative rotation between the pressing knob 300 and the damping sleeve 210.

As shown in fig. 4, the outer wall of the connecting shaft 100 is designed with an external thread, and in conjunction with fig. 5, the pressing knob 300 has a central hole whose inner wall is provided with an internal thread matching with the external thread, so that the pressing knob 300 can be screwed on the connecting shaft 100. But the manner of rotating the connection shaft 100 but only axially moving the pressing knob 300 thereon may be various. Referring to fig. 1, in one embodiment, a first limiting structure 500 is disposed between the fitting portion 310 and an inner wall of the first connection hole 101, and the first limiting structure 500 is used for limiting the pressing knob 300 to move only in the axial direction of the first connection hole 101. Exemplarily, the first limiting structure 500 includes a sliding groove 510 and a sliding block 520, the sliding groove 510 is axially disposed on an inner wall of the first connection hole 101, the sliding block 520 is disposed on the matching portion 310 corresponding to the sliding groove 510, and the sliding block 520 is slidably disposed in the sliding groove 510. The pressing knob 300 can only move in the axial direction by the slider 520 and the slide groove 510. In other embodiments, the first limiting structure 500 may further include ribs axially disposed on the inner wall of the first connection hole 101, and grooves correspondingly disposed on the pressing knob 300 (which may be on the fitting portion 310 or elsewhere). Alternatively, the cross section of the first connection hole 101 may be designed to be non-circular, such as rectangular, triangular, oval, etc. And the outer contour shape of the pressing knob 300 is designed to a shape that is fitted to the cross-sectional shape of the first connection hole 101. So that the pressing knob 300 can be moved only in the axial direction when the connection shaft 100 is rotated. It can be understood that the area of the first connection hole 101 having a non-circular shape needs to be properly designed to ensure that the free rotation of the connection shaft 100 is not affected.

Referring to fig. 1 and 2, in one embodiment, the self-damping rotating device further includes a compression spring 400 sleeved outside the connecting post 320, and both ends of the compression spring 400 are respectively abutted against the matching portion 310 and the damping sleeve 210. In the present embodiment, the compression spring 400 is compressed when the pressing knob 300 moves toward the damping sleeve 210, as shown in fig. 1. Referring to fig. 2, as the pressing knob 300 moves in a direction away from the damping sleeve 210, the compression spring 400 is gradually restored. In this process, the elastic restoring force accumulated due to the compression spring 400 is gradually reduced, that is, the pressing force of the pressing knob 300 against the damping sleeve 210 is gradually reduced due to the presence of the compression spring 400. Therefore, the compression spring 400 can prevent the pressing force of the pressing knob 300 on the damping sleeve 210 from instantly disappearing when the pressing knob 300 moves towards the direction far away from the damping sleeve 210, so that the damping force between the two components is instantly reduced or even disappears. In addition, in the process that the pressing knob 300 moves relative to the damping sleeve 210, the pressing force of the pressing knob 300 on the damping sleeve 210 is positively correlated with the resilience force accumulated by the compression spring 400, and the pressing forces with different magnitudes can be obtained by selecting the compression springs 400 with different K values (elastic coefficients) and compression values, so that the damping force range between the two components is further widened.

Referring to fig. 1 and 3, as an implementation manner, the first connection hole 101 is disposed in the first member 10, the second connection hole 201 is disposed in the second member 20, and the second member 20 is provided with a groove, the first member 10 is inserted into the groove, so that the first connection hole 101 and the second connection hole 201 are coaxial, and the connection shaft 100 is axially fixed to the second member 20 and passes through the first connection hole 101 and the second connection hole 201. The second connection hole 201 includes a mounting hole 211 and a shaft hole 221 communicating with each other, the aperture of the mounting hole 211 is larger than that of the shaft hole 221, the mounting hole 211 is close to the first connection hole 101, and the elastic damping structure 200 is mounted in the mounting hole 211 and partially extends into the first connection hole 101. In this embodiment, two components that are rotatably connected by the connecting shaft 100 are the first component 10 and the second component 20, the second component 20 is provided with a groove that is butted against the first component 10, the first component 10 is inserted into the groove of the second component 20, so that the first connecting hole 101 and the second connecting hole 201 are opposite, and the connecting shaft 100 is inserted into the first connecting hole 101 and the second connecting hole 201 to rotatably connect the first component 10 and the second component 20. The elastic damping structure 200 is installed in the installation hole 211, and it can be understood that a part of the elastic damping structure 200 abuts against an annular end surface formed between the installation hole 211 and the shaft hole 221 and is opposite to a hole wall of the installation hole 211, so that the elastic damping structure 200 is axially fixed in the second connection hole 201. Another portion of the elastic damping structure 200 may extend into the first connection hole 101 for abutment with the pressing knob 300. When the connecting shaft 100 rotates to drive the pressing knob 300 to move towards the elastic damping structure 200, the pressing knob 300 can apply pressure to the part of the elastic damping structure 200 extending into the first connecting hole 101, so that the elastic damping structure 200 is expanded and deformed due to the pressing force, the contact friction force between the elastic damping structure 200 and the hole walls of the first connecting hole 101 and the second connecting hole 201 is increased, and the first component 10 and the second component 20 are rotatably connected with each other with damping.

The form of the structure in which the connecting shaft 100 is axially fixed to the second member 20 may be various. Referring to fig. 1, in one embodiment, the connection shaft 100 includes a positioning part 110 and a shaft part 120 connected, and the second connection hole 201 has a hole diameter greater than an outer diameter of the shaft part 120 and smaller than an outer diameter of the positioning part 110. One end of the shaft 120, which is far away from the positioning portion 110, is inserted into the first connection hole 101 from one end of the second connection hole 201, and one end of the shaft 120, which is far away from the positioning portion 110, is axially fixed with the second component 20 through the second limiting structure 600. As shown in fig. 4, the external thread is provided on the outer wall of the shaft 120, and the shaft 120 is mainly used for cooperating with the pressing knob 300. In this embodiment, one end of the connecting shaft 100 abuts against the end surface of the second connecting hole 201 through the positioning portion 110, and the other end is axially fixed to the second component 20 through the second limiting structure 600, so that the connecting shaft 100 is axially fixed to the second component 20.

In one embodiment, the second limiting structure 600 includes an annular limiting groove 610 and a limiting block 620, the annular limiting groove 610 is disposed on the shaft portion 120, the limiting block 620 is mounted on the second member 20, and a portion of the limiting block 620 can be clamped in the annular limiting groove 610. The axial fixation of the end of the shaft portion 120 away from the positioning portion 110 is realized by the annular limiting groove 610 and the limiting block 620, and the axial fixation of the connecting shaft 100 to the second component 20 is realized by the abutting of the positioning portion 110 and the end face of the second connecting hole 201.

In other embodiments, one end of the connection shaft 100 abuts against the elastic damping structure 200, and the connection shaft 100 is axially movable relative to the elastic damping structure 200. When the connection shaft 100 moves in the direction of the elastic damping structure 200, the connection shaft 100 applies a gradually increasing pressing force to the elastic damping structure 200. In the present embodiment, the axial movement of the connecting shaft 100 directly acts on the elastic damping structure 200, so that the connecting shaft 100 applies gradually increasing pressing force to the elastic damping structure 200, or the pressing force applied by the connecting shaft 100 to the elastic damping structure 200 is gradually reduced. Therefore, a user can adjust the axial position of the connecting shaft 100 according to actual needs to obtain a proper damping size, and the requirement of rotary connection of two components with different damping sizes is met.

In addition, the magnitude of the pressing force applied by the connecting shaft 100 to the elastic damping structure 200 may be fixed. In one embodiment, a pressing block is axially fixed on the connecting shaft 100, the axial positions of the connecting shaft 100 and the pressing block are fixed relative to the elastic damping structure 200, and the pressing block applies a pressing force with a fixed magnitude to the elastic damping structure 200. The connection of the hold-down block to other components of this embodiment may all refer to the connection of the hold-down knob 300 to the components described above, with the only difference being that the hold-down block of this embodiment is not axially movable. In other words, the axial distance of the pressing block with respect to the elastic damping structure 200 is fixed regardless of whether the connecting shaft 100 is rotatable or non-rotatable. Therefore, the pressing force applied to the elastic damping structure 200 is constant, so that the rotational damping force between the two components is constant, and the elastic damping structure is suitable for application scenes needing constant rotational damping force.

In another embodiment, one end of the connecting shaft 100 abuts against the elastic damping structure 200, the axial position of the connecting shaft 100 relative to the elastic damping structure 200 is fixed, and the connecting shaft 100 applies a pressing force with a fixed magnitude to the elastic damping structure 200. In this embodiment, the connecting shaft 100 directly abuts against the elastic damping structure 200, and the axial positions of the two are relatively fixed, so that the pressing force applied to the elastic damping structure 200 is constant, and the rotational damping force between the two components is constant. The self-damping rotation device can be suitable for application scenes needing constant rotation damping force.

Referring to fig. 9, an embodiment of the present invention further provides a head coil assembly including a coil body 30 and a frame 40. The coil body 30 forms a cavity having an accommodation space. The mirror holder 40 is provided with a mirror surface that can receive light outside the cavity and reflect the light into the cavity. The lens holder 40 is connected to the coil body 30 through the base 50 and the support frame 60, the base 50 is installed on the coil body 30, the support frame 60 is rotatably connected to the base 50, the lens holder 40 is rotatably connected to the support frame 60, and the rotation connection is realized through the self-damping rotation device for the magnetic resonance coil in any one of the above embodiments between the lens holder 40 and the support frame 60 and/or between the support frame 60 and the base 50.

In conjunction with fig. 7 and 8, a specific application example of the self-damping rotating device for a magnetic resonance coil in any of the above embodiments is shown. The self-damping rotation device for the magnetic resonance coil is used for realizing self-damping rotation connection between the lens frame 40 and the support frame 60 and/or between the support frame 60 and the base 50. The self-damping rotation device for the magnetic resonance coil enables a user to fix the mirror holder 40 at a desired angular position with respect to the support frame 60 and fix the support frame 60 at a desired angular position with respect to the base 50 as desired by adjusting the magnitude of the pressing force applied by the connecting shaft 100 to the elastic damping structure 200. Thereby, the position of the mirror holder 40 with respect to the coil body 30 can be adjusted, and the adjustment of the visual angle of the mirror surface on the mirror holder 300 with respect to the light reflection can be realized. During the specific use, adjustable mirror holder 40 is for the position of coil body 30 for mirror holder 40 can reflect the visual light of patient's top of head direction or reflect the visual light of patient's foot direction to the patient's eye in, makes the head coil subassembly of this embodiment can realize alleviating the shared use of the fear of claustrophobia and the pertinence scientific research demand two kinds of circumstances.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. A self-damped rotation apparatus for a magnetic resonance coil, comprising:

a connecting shaft (100) for realizing rotational connection between two members respectively provided with a first connecting hole (101) and a second connecting hole (201); and

the elastic damping structure (200) is fixed in the second connecting hole (201) along the axial direction of the connecting shaft (100) and partially extends into the first connecting hole (101), the connecting shaft (100) can apply pressing force to the elastic damping structure (200), so that the elastic damping structure (200) deforms, and contact friction force between the elastic damping structure (200) and the hole wall of the first connecting hole (101) and between the elastic damping structure (200) and the hole wall of the second connecting hole (201) is increased.

2. The self-damping rotation device for the magnetic resonance coil according to claim 1, wherein a pressing knob (300) is connected to the connection shaft (100) in a threaded manner, the pressing knob (300) can abut against a portion of the elastic damping structure (200) extending into the first connection hole (101), the connection shaft (100) can rotate relative to the elastic damping structure (200), the connection shaft (100) can drive the pressing knob (300) to move axially, and when the pressing knob (300) is driven by the connection shaft (100) to move towards the elastic damping structure (200), the pressing knob (300) applies a gradually increasing pressing force to the elastic damping structure (200).

3. The self-damping rotating device for the magnetic resonance coil as claimed in claim 2, wherein the elastic damping structure (200) comprises a damping sleeve (210), the damping sleeve (210) is sleeved outside the connecting shaft (100), one end of the damping sleeve (210) is axially fixed in the second connecting hole (201), the other end of the damping sleeve extends into the first connecting hole (101), and the pressing knob (300) can abut against one end of the damping sleeve (210) extending into the first connecting hole (101).

4. The self-damping rotating device for the magnetic resonance coil according to claim 3, wherein the compressing knob (300) comprises a matching portion (310) and a connecting column (320) which are connected, the matching portion (310) is in sliding fit with the first connecting hole (101), one end of the connecting column (320) far away from the matching portion (310) is used for being abutted against the damping sleeve (210), one end of the damping sleeve (210) close to the compressing knob (300) is provided with a containing hole (220), the containing hole (220) is used for being matched with the connecting column (320), and the aperture of the containing hole (220) is slightly smaller than the outer diameter of the connecting column (320).

5. The self-damping rotating device for the magnetic resonance coil as claimed in claim 4, further comprising a compression spring (400) sleeved outside the connecting column (320), wherein two ends of the compression spring (400) are respectively abutted against the fitting part (310) and the damping sleeve (210).

6. The self-damped rotation device for a magnetic resonance coil according to claim 4, wherein a first limit structure (500) is disposed between the fitting portion (310) and an inner wall of the first connection hole (101), and the first limit structure (500) is used for limiting the pressing knob (300) to move only in an axial direction of the first connection hole (101).

7. The self-damping rotation device for the magnetic resonance coil according to claim 6, wherein the first limiting structure (500) comprises a sliding groove (510) and a sliding block (520), the sliding groove (510) is axially disposed on an inner wall of the first connection hole (101), the sliding block (520) is disposed on the engagement portion (310) corresponding to the sliding groove (510), and the sliding block (520) is slidably disposed in the sliding groove (510).

8. The self-damped rotation device for magnetic resonance coil according to claim 1, wherein the first connection hole (101) is provided to a first member (10), the second connection hole (201) is provided to a second member (20), and the second member (20) is provided with a groove, the first member (10) is inserted into the groove such that the first connection hole (101) is coaxial with the second connection hole (201), the connection shaft (100) is axially fixed to the second member (20) and inserted into the first connection hole (101) and the second connection hole (201), the second connection hole (201) includes a mounting hole (211) and a shaft hole (221) which are communicated, the aperture of the mounting hole (211) is larger than the aperture of the shaft hole (221), the mounting hole (211) is close to the first connection hole (101), the elastic damping structure (200) is installed in the installation hole (211) and partially extends into the first connection hole (101).

9. The self-damped rotation device for a magnetic resonance coil according to claim 8, wherein the connection shaft (100) includes a positioning portion (110) and a shaft portion (120) connected, the second connection hole (201) has a hole diameter larger than the outer diameter of the shaft portion (120) and smaller than the outer diameter of the positioning portion (110), one end of the shaft portion (120) away from the positioning portion (110) is inserted from one end of the second connection hole (201) to the first connection hole (101), and one end of the shaft portion (120) away from the positioning portion (110) is axially fixed to the second member (20) by a second stopper structure (600);

the second limiting structure (600) comprises an annular limiting groove (610) and a limiting block (620), the annular limiting groove (610) is arranged on the shaft portion (120), the limiting block (620) is installed on the second part (20), and part of the limiting block (620) can be clamped in the annular limiting groove (610).

10. A head coil assembly, comprising:

a coil body forming a cavity having an accommodation space; and

the mirror holder is provided with a mirror surface, the mirror surface can receive light outside the cavity and reflect the light to the inside of the cavity, the mirror holder is connected to the coil body through a base and a support frame, the base is installed on the coil body, the support frame is rotatably connected to the base, the mirror holder is rotatably connected to the support frame, and the rotary connection between the mirror holder and the support frame and/or between the support frame and the base is realized through the self-damping rotating device for the magnetic resonance coil according to any one of claims 1 to 9.

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