External viewing unit of head coil assembly and head coil assembly

Abstract

The endoscopic unit of the head coil assembly includes a bracket (10), a first reflective unit (20), and a swivel (50). The first reflective unit is disposed on the bracket and configured to generate an optical path perpendicular to a first direction (D1). The first reflective unit includes a first rotating reflector (30). The first rotating reflector and the swivel are rotatably disposed on the bracket about an axis parallel to the first direction. The swivel is capable of rotating under the influence of gravity perpendicular to its axis of rotation to maintain a constant angle relative to gravity. The rotating swivel can drive the first rotating reflector to rotate so that the direction of change of the outgoing light generated after the incident light perpendicular to the first direction is reflected by the first reflective unit is opposite to the direction of rotation of the swivel, and the angle of change is the same as the angle of rotation of the swivel. The endoscopic unit can automatically adjust the optical path of the first reflective unit according to the placement angle. A head coil assembly is also provided.

Description

Technical Field

[0001] This invention relates to the field of magnetic resonance imaging, and in particular to an endoscopic unit and a head coil assembly. Background Technology

[0002] During an MRI scan, the patient needs to enter the scanning area, which is typically cylindrical. For patients experiencing claustrophobia, a special mirror is provided as an external optic unit to observe the external environment, alleviating their psychological discomfort. The mirror can be, for example, mounted on the coil body of the head coil assembly. Depending on the needs of the examination, many current MRI systems design the coil body to be tiltable, meaning the angle of the coil body can be adjusted around the frontal axis of the patient's head. When the angle of the coil body changes, the mirror angle needs to be manually adjusted accordingly to adjust the optical path, thereby ensuring that the angle of the external environment seen by the patient remains relatively consistent. Manually adjusting the mirror is time-consuming and has low accuracy. Summary of the Invention

[0003] The purpose of this invention is to provide an external optic unit for a head coil assembly that can automatically adjust the optical path according to the placement angle of the coil body with good accuracy.

[0004] Another object of the present invention is to provide a head coil assembly whose external viewing unit can automatically adjust the optical path according to the placement angle of the coil body with good accuracy.

[0005] This invention provides an exoscopic unit for a head coil assembly, comprising a support, a first reflective unit, and a swivel member. The first reflective unit is disposed on the support and configured to generate an optical path perpendicular to a first direction. The first reflective unit includes a first rotating mirror for reflecting light in the optical path. The first rotating mirror is rotatably disposed on the support about an axis parallel to the first direction. The swivel member is rotatably disposed on the support about an axis parallel to the first direction. The swivel member can rotate relative to the support under the action of gravity perpendicular to its rotation axis to maintain a constant angle relative to the direction of gravity. The swivel member rotating under the action of gravity can drive the first rotating mirror to rotate relative to the support, so that the direction of change of the outgoing light generated after the incident light perpendicular to the first direction is reflected by the first reflective unit is opposite to the direction of rotation of the swivel member relative to the support, and the angle of change is the same as the angle of rotation of the swivel member relative to the support.

[0006] The endoscopic unit of this head coil assembly has a swivel component that automatically rotates under gravity according to the placement angle of the endoscopic unit to adjust the light path of the first reflective unit, ensuring that the angle of the external environment seen by the subject remains essentially consistent before and after adjustment. This head coil assembly's endoscopic unit saves manpower and offers good accuracy.

[0007] In another illustrative embodiment of the endoscopic unit of the head coil assembly, the first reflective unit further includes a fixed reflector for reflecting light in the optical path. The fixed reflector is fixedly mounted relative to the support. During the rotation of the first rotating reflector driven by the swivel member, the ratio of the rotation angle of the first rotating reflector to that of the swivel member relative to the support is a specific value. By setting the fixed reflector, the angle of the view obtained by the subject from the first reflective unit can be converted, i.e., the conversion between an upright view and an inverted view.

[0008] In another illustrative embodiment of the endoscopic unit of the head coil assembly, the swivel member has several meshing teeth. These meshing teeth are distributed circumferentially around the rotation axis of the swivel member. The endoscopic unit also includes a first drive gear. The first drive gear is fixed relative to a first rotating reflector. The axis of the first drive gear overlaps with the rotation axis of the first rotating reflector. The first drive gear engages with the swivel member through its meshing teeth, enabling the rotating swivel member to drive the first rotating reflector to rotate relative to the support. This structure offers good stability.

[0009] In another illustrative embodiment of the optic unit of the head coil assembly, the first rotating reflector includes a first rotating frame and a first mirror body. The first rotating frame is rotatably mounted on a support about an axis parallel to a first direction and has a first support plate arranged parallel to its axis of rotation. The first mirror body is attached parallel to the first support plate and is used to reflect light in the optical path. This structure has good stability.

[0010] In another illustrative embodiment of the endoscopic unit of the head coil assembly, the endoscopic unit further includes a second rotating reflector. The reflecting plane of the second rotating reflector is parallel to a first direction. The second rotating reflector is rotatably mounted on a support about an axis parallel to the first direction. A swivel member rotating under gravity can drive the second rotating reflector to rotate relative to the support, and the rotation direction of the second rotating reflector and the swivel member relative to the support is the same, and the ratio of the rotation angles is a specific value. The first reflecting unit and the second rotating reflector are respectively used to reflect light from both sides of the endoscopic unit along a usage direction into the eyes of the examinee, wherein the examinee's eyes are located on one side of the endoscopic unit along a second direction, and the usage direction, the first direction, and the second direction are perpendicular to each other. This facilitates the examinee obtaining lateral visual fields along the usage direction.

[0011] In another illustrative embodiment of the optic unit of the head coil assembly, the optic unit further includes a second drive gear. The second drive gear is fixedly disposed relative to the second rotating reflector. The axis of the second drive gear overlaps with the rotation axis of the second rotating reflector. The second drive gear meshes with the first drive gear. This structure has good stability.

[0012] In another illustrative embodiment of the optic unit of the head coil assembly, the second rotating reflector includes a second rotating frame and a second mirror body. The second rotating frame is rotatably mounted on a support about an axis parallel to the first direction. The second mirror body is connected to the second rotating frame and is used to reflect light. This structure has good stability.

[0013] In another illustrative embodiment of the optic unit of the head coil assembly, the support includes a housing and a partition. The housing encloses a cavity. The partition is disposed in the cavity and divides the cavity into a first chamber and a second chamber. A first reflective unit is disposed in the first chamber, and a second rotating reflector is disposed in the second chamber. This helps to avoid light interference and improve the visual effect.

[0014] In another illustrative embodiment of the optic unit of the head coil assembly, the swivel includes a pivot, a connecting rod, and a gravity plumb bob. The axis of rotation of the swivel is located at the pivot. The connecting rod connects to the pivot and extends radially along the rotation of the swivel. The gravity plumb bob connects to the end of the connecting rod away from the axis of rotation of the swivel. This structure is simple and easy to manufacture.

[0015] The present invention also provides a head coil assembly, comprising a coil body and the aforementioned external optic unit. The coil body is capable of accommodating the subject's head. A support for the external optic unit is connected to the coil body. One direction of use of the support is perpendicular to the transverse section of the subject's head, and a first direction is perpendicular to the sagittal plane of the subject's head. A first reflecting unit is used to reflect light from one side of the external optic unit along the direction of use into the subject's eye. The external optic unit of this head coil assembly has a swivel member that can automatically rotate under gravity according to the placement angle of the external optic unit to adjust the light path of the first reflecting unit, ensuring that the angle of the external environment seen by the subject remains substantially consistent before and after adjustment. The external optic unit of this head coil assembly saves manpower and offers good accuracy.

[0016] In another illustrative embodiment of the head coil assembly, a bracket is movably connected to the coil body along the direction of use. This allows the subject to adjust the assembly according to visual comfort. Attached Figure Description

[0017] The following figures are for illustrative purposes only and do not limit the scope of the invention.

[0018] Figure 1 A schematic implementation of a peephole unit for displaying a head coil assembly is shown in the following usage scenario.

[0019] Figure 2 for Figure 1 The diagram shows the structure of the external optic unit.

[0020] Figure 3 for Figure 2 A partial cross-sectional view of the external optic unit shown.

[0021] Figure 4 and Figure 5 For explanation Figure 3 The working principle of the external optic unit shown.

[0022] Figure 6 For display Figure 1 Another use case for the peep unit shown.

[0023] Label Explanation

[0024] 10 supports

[0025] 11. Outer shell

[0026] 12 cavities

[0027] 121 First Chamber

[0028] 122 Second Chamber

[0029] 13 partitions

[0030] 20 First Reflection Unit

[0031] 30 First rotating mirror

[0032] 31 First Rotating Frame

[0033] 311 First Support Plate

[0034] 32 First mirror body

[0035] 40 Fixed reflector

[0036] 50 swivel joint

[0037] 51 meshing teeth

[0038] 52. Rotating shaft section

[0039] 53 Connecting rod

[0040] 54 Gravity Vertical

[0041] 61 First transmission gear

[0042] 62 Second transmission gear

[0043] 70 Second rotating mirror

[0044] 71 Second Rotating Frame

[0045] 72 Second mirror body

[0046] 100 Coil Body

[0047] 200 external viewing units

[0048] D1 First Direction

[0049] D2 Second Direction

[0050] S direction of use Detailed Implementation

[0051] To provide a clearer understanding of the technical features, objectives, and effects of the invention, specific embodiments of the invention are now described with reference to the accompanying drawings. In the drawings, the same reference numerals indicate components with the same or similar structures but the same function.

[0052] In this document, “illustrative” means “serving as an example, illustration or description”, and any illustration or implementation described herein as “illustrative” should not be construed as a more preferred or advantageous technical solution.

[0053] In this document, terms such as "first" and "second" do not indicate their importance or order, but are only used to distinguish them to facilitate the description of the document.

[0054] To keep the drawings simple, each drawing only schematically shows the parts related to the present invention, and they do not represent the actual structure of the product.

[0055] Figure 1 A schematic implementation of a peephole unit for displaying a head coil assembly is shown in the following usage scenario. For example... Figure 1 As shown, the endoscopic unit 200 of the head coil assembly may, for example, be disposed in the coil body 100 of the head coil assembly. The coil body 100 is used to accommodate the subject's head and to receive magnetic resonance signals from the subject's head.

[0056] Figure 2 for Figure 1 The diagram shows the structure of the external optic unit. Figure 3 for Figure 2 A partial cross-sectional view of the exploratory unit is shown. (See attached image.) Figure 2 and Figure 3 As shown, the endoscopic unit 200 of the head coil assembly includes a bracket 10, a first reflective unit 20, and a swivel member 50. In this illustrative embodiment, the bracket 10 includes, for example, a housing 11 and a partition 13.

[0057] like Figure 3 As shown, the first reflection unit 20 is disposed on the bracket 10 and configured to generate an optical path perpendicular to a first direction D1 (see Figure 1). Figure 4That is, the reflecting planes of the first reflecting unit 20 are all parallel to the first direction D1. Specifically, in this illustrative embodiment, the first reflecting unit 20 includes a first rotating reflector 30 and a fixed reflector 40 for reflecting light in the optical path. The reflecting planes of both the first rotating reflector 30 and the fixed reflector 40 are parallel to the first direction D1. The first rotating reflector 30 is rotatably mounted on the bracket 10 about an axis parallel to the first direction D1. Figure 4 and Figure 5 The first rotating reflector 30 shown is located at different rotational positions relative to the bracket 10. The fixed reflector 40 is fixedly disposed relative to the bracket 10, for example, fixedly attached to the partition 13. Figure 4 and Figure 5 As shown in this illustrative embodiment, light enters the subject's eye after being reflected sequentially by the fixed reflector 40 and the first rotating reflector 30.

[0058] like Figure 2 As shown, the swivel member 50 is rotatably mounted on the bracket 10 about an axis parallel to the first direction D1. Figure 4 and Figure 5 The swivel member 50 shown is located at different rotational positions relative to the support 10. The swivel member 50 can rotate relative to the support 10 under the action of gravity G perpendicular to its rotation axis to maintain a constant angle relative to the direction of gravity G. Specifically, as... Figure 2 As shown, in this illustrative embodiment, the swivel member 50 includes a pivot portion 52, a connecting rod 53, and a gravity plumb line 54. The axis of rotation of the swivel member 50 is located at the pivot portion 52. The connecting rod 53 connects to the pivot portion 52 and extends along the radial direction of rotation of the swivel member 50 (i.e., the radial direction with the axis of rotation of the swivel member 50 as its axis, which intersects the axis of rotation of the swivel member 50 perpendicularly). The gravity plumb line 54 connects to one end of the connecting rod 53 away from the axis of rotation of the swivel member 50. The center of gravity of the swivel member 50 is, for example, located at the gravity plumb line 54. This structure is simple and easy to manufacture, but it is not limited to this; in other illustrative embodiments, the swivel member 50 may also be configured with other structures.

[0059] The rotating swivel 50, under the action of gravity G, can drive the first rotating reflector 30 to rotate relative to the support 10, so that the direction of change of the outgoing light generated after the incident light perpendicular to the first direction D1 is reflected by the first reflecting unit 20 is opposite to the rotation direction of the swivel 50 relative to the support 10, and the angle of change is the same as the rotation angle of the swivel 50 relative to the support 10.

[0060] Specifically, such as Figure 2 As shown, in this illustrative embodiment, the swivel member 50 has several meshing teeth 51. Figure 2(Only one is schematically shown in the diagram). Several meshing teeth 51 are distributed circumferentially around the rotation axis of the swivel member 50. The external viewing unit 200 also includes a first transmission gear 61. The first transmission gear 61 is fixedly disposed relative to the first rotating reflector 30. The axis of the first transmission gear 61 overlaps with the rotation axis of the first rotating reflector 30. The first transmission gear 61 meshes with the swivel member 50 through the meshing teeth 51, so that the rotating swivel member 50 can drive the first rotating reflector 30 to rotate relative to the support 10. In this schematic embodiment, the transmission ratio between the first transmission gear 61 and the swivel member 50 is 1 / 2, so that the ratio of the rotation angle of the first rotating reflector 30 and the swivel member 50 relative to the support 10 is 1 / 2 during the process of the swivel member 50 driving the first rotating reflector 30 to rotate. The meshing transmission is beneficial to improve the stability of the product, but it is not limited to this. In other schematic embodiments, the swivel member 50 may also drive the first rotating reflector 30 to rotate through other transmission structures.

[0061] The following is combined with Figure 4 and Figure 5 This illustration of the operation of the external optic unit 200 is not intended to limit the scope of the invention. In use, the external optic unit 200 is mounted on the coil body 100 of the head coil assembly (see reference 100). Figure 1 The first direction D1 is perpendicular to the direction of gravity G, and the first direction D1 is perpendicular to the sagittal plane of the subject's head housed in the coil body 100. Figure 4 In the scenario shown, light from the right side of the endoscopic unit 200 is reflected by the first reflecting unit 20 and enters the subject's eye. The endoscopic unit 200, mounted on the coil body 100, moves along an axis parallel to the first direction D1. Figure 4 The state shown is reached by rotating clockwise by one adjustment angle (e.g., 10°). Figure 5 During the process shown in the figure (i.e., from) Figure 1 Rotate to the state shown Figure 6As shown in the diagram, under the influence of gravity G, the swivel member 50 rotates counterclockwise relative to the support 10 by the adjustment angle (e.g., 10°). Simultaneously, the swivel member 50 drives the first rotating reflector 30 to rotate clockwise relative to the support 10 by half the adjustment angle (e.g., 5°). Since the support 10 rotates clockwise by the adjustment angle (e.g., 10°) during this process, it is equivalent to the original incident light ray rotating counterclockwise relative to the support 10 by the adjustment angle (e.g., 10°). The light reflected by the fixed reflector 40 also rotates clockwise relative to the support 10 by the adjustment angle (e.g., 10°). Because the first rotating reflector 30 rotates clockwise relative to the support 10 by half the adjustment angle (e.g., 5°), the angle of the light reflected by the first reflecting unit 20 relative to the support 10 remains unchanged before and after the adjustment, i.e., the angle relative to the examinee's eyes remains unchanged. This ensures that the angle of the external environment seen by the examinee remains essentially consistent before and after the adjustment.

[0062] The endoscopic unit of this head coil assembly has a swivel component that automatically rotates under gravity according to the placement angle of the endoscopic unit to adjust the light path of the first reflective unit, ensuring that the angle of the external environment seen by the subject remains essentially consistent before and after adjustment. This head coil assembly's endoscopic unit saves manpower and offers good accuracy.

[0063] like Figure 3 As shown in this illustrative embodiment, the first rotating reflector 30 includes a first rotating frame 31 and a first mirror body 32. The first rotating frame 31 is rotatably mounted on the support 10 about an axis parallel to the first direction D1, and a first transmission gear 61 is fixed, for example, to one end of the first rotating frame 31 along the first direction D1. The first rotating frame 31 has a first support plate 311 arranged parallel to its axis of rotation. The first mirror body 32 is parallel to and attached to the first support plate 311 and is used to reflect light in the optical path. This structure has good stability, but is not limited thereto.

[0064] like Figure 3As shown in this illustrative embodiment, the external optic unit 200 further includes a second rotating reflector 70. The reflecting plane of the second rotating reflector 70 is parallel to the first direction D1. The second rotating reflector 70 is rotatably mounted on the bracket 10 about an axis parallel to the first direction D1. The swivel member 50, which rotates under the influence of gravity, can drive the second rotating reflector 70 to rotate relative to the bracket 10, and the rotation directions of the second rotating reflector 70 and the swivel member 50 relative to the bracket 10 are the same, with a rotation angle ratio of 1 / 2. The first reflecting unit 20 and the second rotating reflector 70 are respectively used to reflect light from the external optic unit 200 along both sides of a usage direction S into the eyes of the examinee, wherein the examinee's eyes are located on one side of the external optic unit 200 along a second direction D2, and the usage direction S, the first direction D1, and the second direction D2 are perpendicular to each other. In use, the usage direction S is, for example, perpendicular to the cross-section of the examinee's head. The first reflecting unit 20 and the second rotating reflecting mirror 70 are used, for example, to present the subject with the view in front (i.e., the direction of the feet) and the view behind (i.e., the direction of the head), respectively.

[0065] Specifically, such as Figure 2 and Figure 3 As shown in this illustrative embodiment, the external viewing unit 200 further includes a second transmission gear 62. The second transmission gear 62 is fixedly disposed relative to the second rotating reflector 70. The axis of the second transmission gear 62 overlaps with the rotation axis of the second rotating reflector 70. The second transmission gear 62 meshes with the first transmission gear 61 and the transmission ratio is 1. This structure has good stability, but is not limited thereto.

[0066] Reference Figure 4 and Figure 5 When using, Figure 4 In the scenario shown, light from the left side of the endoscopic unit 200 is reflected by the second rotating reflector 70 and enters the subject's eye. The endoscopic unit 200, along with the coil body 100, rotates around an axis parallel to the first direction D1. Figure 4 The state shown is reached by rotating clockwise by one adjustment angle (e.g., 10°). Figure 5During the process shown, the swivel member 50 rotates counterclockwise relative to the support 10 by the adjustment angle (e.g., 10°) under the action of gravity G. Simultaneously, the swivel member 50 drives the second rotating reflector 70 to rotate counterclockwise relative to the support 10 by half the adjustment angle (e.g., 5°). Since the support 10 rotates clockwise by the adjustment angle (e.g., 10°) during this process, it is equivalent to the original incident light ray rotating counterclockwise relative to the support 10 by the adjustment angle (e.g., 10°). Because the second rotating reflector 70 rotates counterclockwise relative to the support 10 by half the adjustment angle (e.g., 5°), the angle of the light reflected by the second rotating reflector 70 relative to the support 10 remains unchanged before and after the adjustment, i.e., the angle relative to the examinee's eyes remains unchanged. This ensures that the angle of the external environment seen by the examinee remains essentially consistent before and after the adjustment.

[0067] like Figure 3 As shown in the schematic embodiment, the second rotating reflector 70 includes a second rotating frame 71 and a second mirror body 72. The second rotating frame 71 is rotatably mounted on the support 10 about an axis parallel to the first direction D1, and a second transmission gear 62 is fixed, for example, to one end of the second rotating frame 71 along the first direction D1. The second mirror body 72 is connected to the second rotating frame 71 and is used to reflect light. This structure is simple and has good stability, but it is not limited to this.

[0068] like Figure 3 As shown in the schematic embodiment, the outer casing 11 forms a cavity 12. A partition 13 is disposed in the cavity 12 and divides the cavity 12 into a first chamber 121 and a second chamber 122. A first reflecting unit 20 is disposed in the first chamber 121, and a second rotating reflector 70 is disposed in the second chamber 122. This helps to avoid light interference and improve the visual effect, but is not limited thereto. The swivel member 50, the first transmission gear 61, and the second transmission gear 62 are disposed, for example, on the outside of the outer casing 11, but are not limited thereto.

[0069] The present invention also provides a head coil assembly, in one illustrative embodiment, such as Figure 1As shown, it includes a coil body 100 and the aforementioned external optic unit 200. The coil body 100 can accommodate the subject's head. A bracket 10 of the external optic unit 200 is connected to the coil body 100. One operating direction S of the bracket 10 is perpendicular to the cross-section of the subject's head, and a first direction D1 is perpendicular to the sagittal plane of the subject's head. A first reflecting unit 20 is used to reflect light from the external optic unit 200 along the operating direction S into the subject's eye. The external optic unit of this head coil assembly has a swivel member that can automatically rotate under gravity according to the placement angle of the external optic unit to adjust the light path of the first reflecting unit, so that the angle of the external environment seen by the subject remains basically consistent before and after adjustment. The external optic unit of this head coil assembly saves manpower and has good accuracy.

[0070] In the illustrative embodiment, the bracket 10 is movably connected to the coil body 100 along the direction of use S. This allows the subject to adjust the bracket according to visual comfort, but is not limited thereto.

[0071] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0072] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present invention and are not intended to limit the scope of protection of the present invention. All equivalent implementation schemes or modifications made without departing from the spirit of the present invention, such as combinations, divisions or repetitions of features, should be included within the scope of protection of the present invention.

Claims

1. An external viewing unit for a head coil assembly, characterized in that, include: A stand; A first reflecting unit is disposed on the bracket and configured to generate an optical path perpendicular to a first direction. The first reflecting unit includes a first rotating mirror for reflecting light in the optical path. The first rotating mirror is rotatably disposed on the bracket about an axis parallel to the first direction. as well as A swivel member is rotatably mounted on the support about an axis parallel to the first direction. The swivel member can rotate relative to the support under the action of gravity perpendicular to its rotation axis to maintain a constant angle relative to the direction of gravity. The swivel member rotating under the action of gravity can drive the first rotating reflector to rotate relative to the support, so that the direction of change of the outgoing light generated after the same incident light perpendicular to the first direction is reflected by the first reflecting unit is opposite to the rotation direction of the swivel member relative to the support, and the angle of change is the same as the rotation angle of the swivel member relative to the support.

2. The endoscopic unit of the head coil assembly as described in claim 1, characterized in that, The first reflecting unit further includes a fixed reflecting mirror for reflecting light in the optical path. The fixed reflecting mirror is fixedly disposed relative to the bracket. During the process of the swivel member driving the first rotating reflecting mirror to rotate, the ratio of the rotation angle of the first rotating reflecting mirror to that of the swivel member relative to the bracket is a specific value.

3. The endoscopic unit of the head coil assembly as described in claim 2, characterized in that, The swivel member has several meshing teeth distributed circumferentially around the rotation axis of the swivel member. The external viewing unit also includes a first transmission gear, which is fixedly disposed relative to the first rotating mirror. The axis of the first transmission gear overlaps with the rotation axis of the first rotating mirror. The first transmission gear meshes with the swivel member through the meshing teeth, so that the rotating swivel member can drive the first rotating mirror to rotate relative to the support.

4. The endoscopic unit of the head coil assembly as claimed in claim 1, characterized in that, The first rotating reflector includes a first rotating frame and a first mirror body. The first rotating frame is rotatably mounted on the support about an axis parallel to the first direction and has a first support plate arranged parallel to its rotation axis. The first mirror body is attached to the first support plate in parallel and is used to reflect light in the optical path.

5. The endoscopic unit of the head coil assembly as described in claim 3, characterized in that, The endoscopic unit further includes a second rotating reflector, the reflecting plane of which is parallel to the first direction. The second rotating reflector is rotatably mounted on the bracket about an axis parallel to the first direction. The swivel member, which rotates under the action of gravity, can drive the second rotating reflector to rotate relative to the bracket. The rotation direction of the second rotating reflector and the swivel member relative to the bracket is the same, and the ratio of their rotation angles is a specific value. The first reflecting unit and the second rotating reflector are respectively used to reflect light from both sides of the endoscopic unit along a usage direction into the eyes of the examinee. The examinee's eyes are located on one side of the endoscopic unit along a second direction. The usage direction, the first direction, and the second direction are perpendicular to each other.

6. The endoscopic unit of the head coil assembly as described in claim 5, characterized in that, The external viewing unit also includes a second transmission gear, which is fixedly disposed relative to the second rotating reflector. The axis of the second transmission gear overlaps with the rotation axis of the second rotating reflector, and the second transmission gear meshes with the first transmission gear.

7. The endoscopic unit of the head coil assembly as claimed in claim 5, characterized in that, The second rotating reflector includes a second rotating frame and a second mirror body. The second rotating frame is rotatably mounted on the support about an axis parallel to the first direction, and the second mirror body is connected to the second rotating frame and is used to reflect light.

8. The optic unit of the head coil assembly as described in claim 5, characterized in that, The support includes: An outer shell that encloses a cavity, and A partition is disposed in the cavity and divides the cavity into a first chamber and a second chamber, the first reflecting unit is disposed in the first chamber, and the second rotating reflector is disposed in the second chamber.

9. The optic unit of the head coil assembly as claimed in claim 1, characterized in that, The swivel component includes: A rotating shaft portion, wherein the axis of rotation of the swivel member is located at the rotating shaft portion. A connecting rod, which connects to the rotating shaft and extends radially along the rotation of the swivel member, and A gravity-operated plumb bob is connected to one end of the connecting rod that is away from the axis of rotation of the plumb bob.

10. A head coil assembly, characterized in that, include: A coil body that can accommodate the subject's head; as well as An exoscopic unit as described in any one of claims 1 to 9, wherein the bracket of the exoscopic unit is connected to the coil body, one use direction of the bracket is perpendicular to a cross section of the subject's head, the first direction is perpendicular to a sagittal plane of the subject's head, and the first reflective unit is used to reflect light from the exoscopic unit along one side of the use direction into the subject's eye.

11. The head coil assembly as claimed in claim 10, characterized in that, The bracket is movably connected to the coil body along the direction of use.

Images