Head fixing mechanism for magnetic resonance examination

Abstract

The utility model relates to the technical field of magnetic resonance application, and discloses a magnetic resonance examination head fixing mechanism which comprises a base, the upper surface of the base is fixedly connected with a sickbed, the upper surface of the sickbed is fixedly connected with a headrest, an adjusting assembly is arranged in the sickbed, a clamping assembly is arranged above the sickbed, and the headrest is fixedly connected with the sickbed. The adjusting assembly comprises a rotating disc, a handle is fixedly connected to the front surface of the rotating disc, a worm is fixedly connected to the rear surface of the rotating disc, a worm gear is rotatably connected to the inner wall of the bottom end of the sickbed body, a first gear is fixedly connected to the upper surface of the worm gear, and a first rack is slidably connected to the inner wall of the rear side of the sickbed body. The inner wall of the front side of the sickbed is slidably connected with a second rack. According to the head fixing device, the rotating disc, the handle, the worm, the worm wheel, the first gear, the second gear, the first rack and the second rack are matched, the clamping plates on the two sides can move towards the center of a sickbed at the same time, the head of a patient is fixed, time is saved, and working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic resonance application, in particular to a head fixing mechanism for magnetic resonance inspection. Background Art

[0002] Magnetic resonance is a physical phenomenon and also a technology used to image and analyze the structure of matter. The most common are nuclear magnetic resonance and magnetic resonance imaging, which are widely used in fields such as medicine, chemistry and biology. Magnetic resonance imaging is a medical imaging technology that uses strong magnetic fields and harmless radio waves to produce detailed images of the human body's internal structure. When using magnetic resonance imaging to examine the patient's head, it is often necessary to fix the patient's head. Common fixing mechanisms require unilateral fixation one by one, which is more troublesome to operate.

[0003] After searching, a Chinese patent with authorization announcement number CN219000285U discloses a magnetic resonance head inspection fixture. The device is provided with a moving mechanism inside the installation cavity. The cavity, rotating wheel, worm, worm wheel, transmission gear, transmission rack, limit rod, limit sleeve and connecting plate of the moving mechanism are cooperated with each other to drive the splint and the cushion to move conveniently. The self-locking function between the worm and the worm wheel is used to fix the splint and the cushion anywhere, making the fixture more convenient and efficient when in use, thereby greatly improving the practicality of the fixture when in use.

[0004] Although the device has certain improvements, it still has the following shortcomings: when fixing the patient's head, the device still needs to rotate the wheel to fix the patient's head one side at a time, which is troublesome to operate, wastes time and is inefficient. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides a head fixing mechanism for magnetic resonance examination, aiming to improve the problem mentioned in the prior art that "when fixing the patient's head, it is necessary to fix one side at a time, which is cumbersome to operate, wastes time and is inefficient".

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a head fixing mechanism for magnetic resonance examination includes a base, the upper surface of the base is fixedly connected to a hospital bed, the upper surface of the hospital bed is fixedly connected to a headrest, an adjustment component is arranged inside the hospital bed, a clamping component is arranged above the hospital bed, the adjustment component includes a turntable, a handle is fixedly connected to the front surface of the turntable, a worm is fixedly connected to the rear surface of the turntable, a worm wheel is rotatably connected to the inner wall of the bottom end of the hospital bed, and a gear 1 is fixedly connected to the upper surface of the worm wheel.

[0007] As a further description of the above technical solution:

[0008] The inner wall at the rear side of the bed is slidably connected to a rack 1, the inner wall at the front side of the bed is slidably connected to a rack 2, the upper surface of the rack 2 is fixedly connected to a connecting rod, and the inner wall at the bottom end of the bed is rotatably connected to a gear 2.

[0009] As a further description of the above technical solution:

[0010] The turntable penetrates through and is rotatably connected to the front surface of the hospital bed.

[0011] As a further description of the above technical solution:

[0012] The handle is fixedly connected to a non-center position on the front surface of the turntable, the worm is meshed with the worm wheel, and the rear surface of the worm is rotatably connected to the inner wall on the rear side of the hospital bed.

[0013] As a further description of the above technical solution:

[0014] The gear 1 is meshed with the rack 1, the gear 2 is meshed with the rack 1, the gear 2 is meshed with the rack 2, and the connecting rod is configured to be L-shaped.

[0015] As a further description of the above technical solution:

[0016] The clamping assembly comprises a positioning rod, the inner wall of which is elastically connected to a slider via a compression spring, the left surface of the slider is fixedly connected to a clamping plate, and the left surface of the clamping plate is fixedly connected to a rubber pad.

[0017] As a further description of the above technical solution:

[0018] The positioning rod penetrates through and is slidably connected to the upper surface of the hospital bed.

[0019] As a further description of the above technical solution:

[0020] The positioning rods are provided in two groups, and the two groups of positioning rods are symmetrically distributed around the center of the bed.

[0021] As a further description of the above technical solution:

[0022] The slider penetrates and is slidably connected to the left surface of the positioning rod, one end of the compression spring is fixedly connected to the right surface of the slider, and the other end of the compression spring is fixedly connected to the inner wall of the right side of the positioning rod.

[0023] As a further description of the above technical solution:

[0024] The rubber pad is made of rubber material.

[0025] The utility model has the following beneficial effects:

[0026] 1. In the utility model, through the cooperation of the turntable, the handle, the worm, the worm wheel, the gear 1, the gear 2, the rack 1 and the rack 2, the splints on both sides can be moved toward the center of the bed at the same time when the turntable is rotated to clamp and fix the patient's head, which solves the problem that the traditional fixing mechanism needs to fix one side one by one, the operation is troublesome and time-consuming, and the work efficiency is improved.

[0027] 2. In the utility model, the patient's head can be firmly fixed by the cooperation of the positioning rod, the slider, the splint, the rubber pad and the compression spring. Since the rubber pad is soft and the compression spring has the elastic property, it can also prevent the patient from feeling uncomfortable due to the strong clamping force, thereby enhancing the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic front view of the three-dimensional structure of the overall device in the utility model;

[0029] Figure 2 It is a schematic cross-sectional view of the three-dimensional structure of the hospital bed in the utility model;

[0030] Figure 3 It is a schematic front view of the three-dimensional structure of the adjusting component and the clamping component in the utility model;

[0031] Figure 4 It is a schematic cross-sectional view of the three-dimensional structure of the positioning rod in the utility model.

[0032] Legend:

[0033] 1. Base; 2. Hospital bed; 31. Turntable; 32. Handle; 33. Worm; 34. Worm wheel; 35. Gear 1; 36. Rack 1; 37. Gear 2; 38. Rack 2; 39. Connecting rod; 41. Positioning rod; 42. Slider; 43. Clamp; 44. Rubber pad; 45. Compression spring; 5. Headrest. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] Reference Figure 1 - Figure 3The utility model provides an embodiment: a head fixing mechanism for magnetic resonance examination, comprising a base 1 for supporting the overall device, a bed 2 is fixedly connected to the upper surface of the base 1, a notch is provided at the tail of the bed 2, and is arranged in an upward arc shape, which is convenient for gripping and convenient for medical staff to push the bed 2 into the magnetic resonance examination equipment, a headrest 5 is fixedly connected to the upper surface of the bed 2, after the patient lies on the bed 2, the head can be rested on the headrest 5, the headrest 5 is set to be sponge material, and the texture is soft, an adjustment component is arranged inside the bed 2, the adjustment component can adjust the position of the clamping component, a clamping component is arranged above the bed 2, and the clamping component can fix the patient's head on the bed 2, the adjustment component includes a turntable 31, the front surface of the turntable 31 is fixedly connected to a handle 32, the handle 32 is easy to grasp, and the turntable 31 can be driven to rotate by grasping the handle 32, and the rear surface of the turntable 31 is fixedly connected to a worm 33, and the inner wall of the bottom end of the bed 2 is rotatably connected to a worm wheel 34. The worm 33 and the worm wheel 34 are prior art and can be implemented by technicians in this field. Since they are prior art, they will not be described in detail in this case. In the utility model, the helix angle of the worm 33 is less than 3°, and the worm wheel 34 cannot drive the worm 33 to rotate. A gear 35 is fixedly connected to the upper surface of the worm wheel 34, and when the worm wheel 34 rotates, it will drive the gear 35 to rotate synchronously.

[0036] Reference Figure 1 - Figure 3 The inner wall on the rear side of the bed 2 is slidably connected to a rack 1 36, and the inner wall on the front side of the bed 2 is slidably connected to a rack 2 38. When the rack 1 36 and the rack 2 38 move, the positioning rod 41 will be driven to move. The upper surface of the rack 2 38 is fixedly connected to a connecting rod 39, and the inner wall at the bottom end of the bed 2 is rotatably connected to a gear 2 37.

[0037] Reference Figure 1 - Figure 3 The turntable 31 penetrates and is rotatably connected to the front surface of the bed 2. The handle 32 is fixedly connected to a non-center position on the front surface of the turntable 31, so that the handle 32 can drive the turntable 31 to rotate with less effort. The worm 33 and the worm wheel 34 are meshed. When the worm 33 rotates, the worm wheel 34 will be driven to rotate. In the utility model, the transmission ratio of the worm wheel 34 and the worm 33 is 1:10. When the worm 33 rotates 10 circles, the worm wheel 34 only rotates one circle. The device has high precision when adjusted. The rear surface of the worm 33 is rotatably connected to the inner wall of the rear side of the bed 2.

[0038] Reference Figure 2 - Figure 3, gear one 35 is meshed with rack one 36, and when gear one 35 rotates, it will drive rack one 36 to move laterally, gear two 37 is meshed with rack one 36, and when rack one 36 moves laterally, it will drive gear two 37 to rotate, gear two 37 and gear one 35 are the same size, gear two 37 is meshed with rack two 38, and when gear two 37 rotates, it will drive rack two 38 to slide laterally, rack one 36 and rack two 38 are set in relative directions, so rack one 36 and rack two 38 move in opposite directions, and connecting rod 39 is set in L shape.

[0039] Reference Figure 1 , Figure 3 , Figure 4 The clamping assembly includes a positioning rod 41, the inner wall of the positioning rod 41 is elastically connected to a slider 42 through a compression spring 45, the left surface of the slider 42 is fixedly connected to a clamp 43, the clamp 43 can clamp and fix the patient's head, and the left surface of the clamp 43 is fixedly connected to a rubber pad 44.

[0040] Reference Figure 1 , Figure 3 , Figure 4 The positioning rod 41 passes through and is slidably connected to the upper surface of the bed 2. The positioning rod 41 is provided with two groups. The two groups of positioning rods 41 are symmetrically distributed with respect to the center of the bed 2. The lower surface of one group of positioning rods 41 is fixedly connected to the upper surface of the rack 36, and the lower surface of the other group of positioning rods 41 is fixedly connected to the upper surface of the connecting rod 39. The slider 42 passes through and is slidably connected to the left surface of the positioning rod 41. One end of the compression spring 45 is fixedly connected to the right surface of the slider 42, and the other end of the compression spring 45 is fixedly connected to the inner wall on the right side of the positioning rod 41. When the slider 42 moves to the right, it will squeeze the compression spring 45 to generate a reaction force. The slider 42, the compression spring 45, the splint 43 and the rubber pad 44 are provided with two groups, which are symmetrically distributed with respect to the center line of the bed 2. The rubber pad 44 is made of rubber material with a soft texture, which can prevent the patient from feeling uncomfortable when the splint 43 is clamped too tightly.

[0041] The worm 33, worm wheel 34, gear 1 35, rack 1 36, gear 2 37, rack 2 38 and compression spring 45 used in the present invention are all made of plastic material and will not affect the inspection.

[0042] Working principle: When in use, first let the patient lie on the bed 2, then let the patient rest his head on the headrest 5, and then fix the patient's head.

[0043] When fixed, grasp the handle 32 to drive the turntable 31 to rotate. When the turntable 31 rotates, the worm 33 will be driven to rotate. The rotation of the worm 33 will drive the worm wheel 34 and gear 1 35 to rotate. The rotating gear 1 35 will drive the rack 1 36 to move toward the center of the bed 2. When the rack 1 36 moves, it will drive the gear 2 37 to rotate. The rotating gear 2 37 will drive the rack 2 38 to move toward the center of the bed 2. When the rack 2 38 and the rack 1 36 move, they will drive the connecting rod 39 and the positioning rod 41 to move toward the center of the bed 2.

[0044] When the positioning rod 41 moves, it will drive the slider 42, the clamp 43, the rubber pad 44 and the compression spring 45 to move synchronously. When the rubber pad 44 contacts the patient's head, the turntable 31 continues to rotate. Since the rubber pad 44 has already contacted the patient, the rubber pad 44 will not move, and the positioning rod 41 will approach the rubber pad 44. During the approach, the slider 42 will retract into the interior of the positioning rod 41 and squeeze the compression spring 45 to generate a reaction force. The reaction force of the compression spring 45 will clamp the patient's head to prevent it from loosening during clamping. After the patient's head is clamped, the turntable 31 is released and the device will be fixed. Because the rubber pad 44 is soft and the compression spring 45 is elastic, it can also ensure that the clamping will not cause discomfort to the patient.

[0045] After the fixation is completed, the bed 2 is pushed to push the patient into the magnetic resonance examination equipment for examination. After the examination is completed, the bed 2 is pulled out, and then the handle 32 is grasped and rotated in the opposite direction. When the handle 32 is rotated in the opposite direction, the worm 33 and the turntable 31 will be driven to rotate in the opposite direction. The worm 33 rotating in the opposite direction will drive the worm wheel 34 and the gear 1 35 to rotate in the opposite direction. The gear 1 35 rotating in the opposite direction will drive the rack 1 36 to move toward the left side of the bed 2, and the rack 1 36 will drive the gear 2 37 to rotate in the opposite direction. The gear 2 37 rotating in the opposite direction will drive the rack 2 38 to move toward the right side of the bed 2. The moving rack 2 38 and rack 1 36 will drive the connecting rod 39, the positioning rod 41, the splint 43 and the rubber pad 44 to move to release the clamping of the patient's head, and then the patient is helped off the bed 2 to complete the examination.

[0046] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A head fixing mechanism for magnetic resonance examination, comprising a base (1), characterized in that: The upper surface of the base (1) is fixedly connected to a hospital bed (2), the upper surface of the hospital bed (2) is fixedly connected to a headrest (5), an adjustment component is arranged inside the hospital bed (2), a clamping component is arranged above the hospital bed (2), the adjustment component comprises a turntable (31), a handle (32) is fixedly connected to the front surface of the turntable (31), a worm (33) is fixedly connected to the rear surface of the turntable (31), a worm wheel (34) is rotatably connected to the inner wall of the bottom end of the hospital bed (2), and a gear 1 (35) is fixedly connected to the upper surface of the worm wheel (34).

2. The head fixing mechanism for magnetic resonance examination according to claim 1, characterized in that: The inner wall at the rear side of the bed (2) is slidably connected to a rack 1 (36), the inner wall at the front side of the bed (2) is slidably connected to a rack 2 (38), the upper surface of the rack 2 (38) is fixedly connected to a connecting rod (39), and the inner wall at the bottom end of the bed (2) is rotatably connected to a gear 2 (37).

3. The head fixing mechanism for magnetic resonance examination according to claim 1, characterized in that: The turntable (31) penetrates through and is rotatably connected to the front surface of the hospital bed (2).

4. The head fixing mechanism for magnetic resonance examination according to claim 1, characterized in that: The handle (32) is fixedly connected to a non-center position of the front surface of the turntable (31), the worm (33) is meshed with the worm wheel (34), and the rear surface of the worm (33) is rotatably connected to the inner wall of the rear side of the hospital bed (2).

5. The head fixing mechanism for magnetic resonance examination according to claim 2, characterized in that: The gear 1 (35) is meshed with the rack 1 (36), the gear 2 (37) is meshed with the rack 1 (36), the gear 2 (37) is meshed with the rack 2 (38), and the connecting rod (39) is configured to be L-shaped.

6. The head fixing mechanism for magnetic resonance examination according to claim 1, characterized in that: The clamping assembly comprises a positioning rod (41), the inner wall of the positioning rod (41) is elastically connected to a slider (42) via a compression spring (45), the left surface of the slider (42) is fixedly connected to a clamping plate (43), and the left surface of the clamping plate (43) is fixedly connected to a rubber pad (44).

7. The head fixing mechanism for magnetic resonance examination according to claim 6, characterized in that: The positioning rod (41) penetrates through and is slidably connected to the upper surface of the hospital bed (2).

8. The head fixing mechanism for magnetic resonance examination according to claim 6, characterized in that: Two groups of positioning rods (41) are provided, and the two groups of positioning rods (41) are symmetrically distributed left and right around the center of the hospital bed (2).

9. The head fixing mechanism for magnetic resonance examination according to claim 6, characterized in that: The slider (42) penetrates through and is slidably connected to the left surface of the positioning rod (41), one end of the compression spring (45) is fixedly connected to the right surface of the slider (42), and the other end of the compression spring (45) is fixedly connected to the inner wall on the right side of the positioning rod (41).

10. The head fixing mechanism for magnetic resonance examination according to claim 6, characterized in that: The rubber pad (44) is made of rubber material.

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