Head fixing device for oral cavity CT (Computed Tomography)

Abstract

The utility model provides a head fixing device for oral cavity CT (Computed Tomography), which relates to the field of head fixing devices and comprises a backup plate positioned on one side of an oral cavity CT machine, a fixing plate is fixedly mounted on the backup plate, an arc-shaped plate for supporting the head and the neck and a flexible belt are respectively arranged on the fixing plate, and the flexible belt is fixedly mounted on the backup plate. A sliding groove allowing the flexible belt to slide is formed in the arc-shaped plate, a locking assembly used for driving the flexible belt to slide along the sliding groove is further arranged on one side of the fixing plate, the head of a patient penetrates through the position between the arc-shaped plate and the flexible belt, the locking assembly drives the flexible belt to slide along the sliding groove, the neck of the patient is supported, the head is not prone to shifting, and the patient can conveniently and rapidly take the neck of the patient. And the head fixing effect is improved to a certain extent.

Description

Technical Field

[0001] The utility model relates to the field of head fixing devices, in particular to a head fixing device used for oral cavity CT shooting. Background Art

[0002] Oral CT collects data in a spiral manner around a volume of the human body. The essential difference between oral CT and conventional CT is that the former obtains three-dimensional information, while the latter obtains two-dimensional information. Oral CT has improved the scanning speed, has a wide scanning coverage, and collects volume data without gaps, which is convenient for image reconstruction in various ways and angles, and can be reconstructed arbitrarily and retrospectively. Oral CT three-dimensional reconstruction technology includes multi-plane reconstruction method, maximum density projection method, surface shadow display method and volume rendering method, etc. Different reconstruction methods are selected according to different parts, lesions and clinical requirements.

[0003] When the existing device takes a patient's oral CT scan, the patient is required to maintain a sitting or standing position. When the patient is unable to maintain a sitting or standing position, it is easy for the patient's head to rotate or shift during the shooting process, resulting in poor CT film quality, which greatly increases the difficulty of oral CT shooting and reduces the efficiency of oral CT shooting.

[0004] Therefore, it is necessary to provide a new head fixing device for oral CT imaging to solve the above technical problems. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a head fixing device for oral CT imaging.

[0006] The head fixing device for oral CT imaging provided by the utility model comprises a backing plate located at one side of the oral CT machine, a fixing plate is fixedly installed on the backing plate, an arc plate and a flexible belt for supporting the head and neck are respectively provided on the fixing plate, a sliding groove for sliding the flexible belt is opened on the arc plate, and a locking component for driving the flexible belt to slide along the sliding groove is also provided on one side of the fixing plate.

[0007] Furthermore, the locking assembly includes a first arc frame, a second arc frame, a pressure block and a pressing assembly. The second arc frame and the first arc frame are respectively fixed to the flexible belt and one end of the fixed plate. One end of the second arc frame is located in the inner cavity of the first arc frame. The top of the first arc frame is provided with a movable groove for the pressure block to move. The first arc frame is provided with a plurality of tooth blocks on both sides of the top of the movable groove. The bottom of the pressure block is provided with a tooth groove matching the tooth block. The first arc frame is also provided with a pressing assembly for promoting the movement.

[0008] Furthermore, the pressing assembly includes a pressing handle, one end of which has a protrusion, and the protruding end of the pressing handle is fitted to the top of the pressing block, the end of the pressing handle with the protrusion is hinged with a lifting rod, the end of the lifting rod away from the pressing handle passes through the first arc frame and the second arc frame respectively, and the bottom of the lifting rod is fitted with the bottom of the second arc frame.

[0009] Furthermore, a connecting tube for the lifting rod to pass through is provided inside the second arc-shaped frame, a limit block for limiting the movement of the lifting rod is provided near the bottom of the inner cavity of the connecting tube, and a sliding column is provided on the outer surface of the connecting tube.

[0010] Furthermore, the inner side wall of the first arc-shaped frame is provided with a connecting groove for the sliding column to move.

[0011] Furthermore, a headrest pad for placing the head is provided on the top of the backrest.

[0012] Compared with the related art, the head fixing device for oral CT imaging provided by the utility model has the following beneficial effects:

[0013] The patient's head passes through the arc plate and the flexible belt, and the locking assembly drives the flexible belt to slide along the slide groove to support the patient's neck, making it difficult for the head to shift, thereby improving the head fixation effect to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of the head fixing device for oral CT imaging provided by the utility model;

[0015] Figure 2 A schematic diagram of the structure of the backing plate, the arc-shaped plate and the flexible belt provided by the utility model;

[0016] Figure 3 A schematic diagram of the structure of the locking assembly, the arc plate and the flexible belt provided by the utility model;

[0017] Figure 4 A schematic diagram of the overall structure of the locking assembly provided by the utility model;

[0018] Figure 5 A schematic cross-sectional view of the locking assembly provided by the utility model;

[0019] Figure 6 A schematic diagram of the structure of the first arc frame provided by the utility model;

[0020] Figure 7 A schematic diagram of the structure of the second arc frame provided by the utility model;

[0021] Figure 8 This is a structural schematic diagram of the pressing block provided by the utility model.

[0022] Numbers in the figure: 1. oral CT machine; 2. back plate; 3. fixed plate; 4. arc plate; 5. flexible belt; 6. slide groove; 7. first arc frame; 8. second arc frame; 9. pressure block; 10. movable groove; 11. tooth block; 12. tooth groove; 13. pressure handle; 14. lifting rod; 15. connecting pipe; 16. limit block; 17. sliding column; 18. headrest pad. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0024] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 as well as Figure 8 ,in, Figure 1 This is a schematic diagram of the overall structure of the head fixing device for oral CT imaging provided by the utility model;

[0025] Figure 2 A schematic diagram of the structure of the backing plate, the arc-shaped plate and the flexible belt provided by the utility model; Figure 3 A schematic diagram of the structure of the locking assembly, the arc plate and the flexible belt provided by the utility model; Figure 4 A schematic diagram of the overall structure of the locking assembly provided by the utility model; Figure 5 A schematic cross-sectional view of the locking assembly provided by the utility model; Figure 6 A schematic diagram of the structure of the first arc frame provided by the utility model; Figure 7 A schematic diagram of the structure of the second arc frame provided by the utility model; Figure 8 This is a structural schematic diagram of the pressing block provided by the utility model.

[0026] In the specific implementation process, Figure 1-Figure 2 As shown, the head fixing device for oral CT imaging includes a backrest 2 located at one side of an oral CT machine 1, a fixing plate 3 is fixedly mounted on the backrest 2, a headrest pad 18 for placing the head is also provided on the top of the backrest 2, an arc-shaped plate 4 and a flexible belt 5 for supporting the head and neck are respectively provided on the fixing plate 3, a slide groove 6 for the flexible belt 5 to slide is opened on the arc-shaped plate 4, and a locking component for driving the flexible belt 5 to slide along the slide groove 6 is also provided on one side of the fixing plate 3.

[0027] In a specific embodiment, reference Figure 3-Figure 8The locking assembly includes a first arc frame 7, a second arc frame 8, and a pressure block 9. The second arc frame 8 and the first arc frame 7 are respectively fixed to the flexible belt 5 and one end of the fixed plate 3. One end of the second arc frame 8 is located in the inner cavity of the first arc frame 7. The top of the first arc frame 7 is provided with a movable groove 10 for the pressure block 9 to move. The first arc frame 7 is provided with a plurality of tooth blocks 11 on both sides of the top of the movable groove 10. The bottom of the pressure block 9 is provided with a tooth groove 12 matching the tooth block 11. The first arc frame 7 is also provided with a pressing assembly for pushing the activity. The second arc frame 8 is inserted into the inner cavity of the first arc frame 7, so that the second arc frame 8 moves in an arc shape inside the first arc frame 7, thereby changing the size of the flexible belt 5 and the arc plate 4.

[0028] It should be noted that the first arc frame 7 and one end of the flexible belt 5 are hinged. Specifically, a fixed connecting rod is provided on the first arc frame 7, and a connecting seat is provided on the top of the flexible belt 5. One end of the fixed connecting rod is rotatably connected to one side of the connecting seat through an axial rod, so that the first arc frame 7 can drive the flexible belt 5 to slide in the slide groove 6 when it is contracted.

[0029] Specifically, the pressing assembly includes a pressing handle 13, one end of which has a protrusion, and the protruding end of the pressing handle 13 is fitted on the top of the pressing block 9. The protruding end of the pressing handle 13 is hinged with a lifting rod 14, and the end of the lifting rod 14 away from the pressing handle 13 passes through the first arc frame 7 and the second arc frame 8 respectively, and the bottom of the lifting rod 14 is fitted with the bottom of the second arc frame 8. The pressing handle 13 is rotated so that the part with the protruding end squeezes the pressing block 9 to move downward, so that the tooth groove 12 at the bottom of the pressing block 9 is engaged with the tooth block 11. It should be noted that the tooth groove 12 at the bottom of the pressing block 9 matches the tooth direction of the tooth block 11, and the engagement is completed by the meshing of the two tooth grooves 12. When the two tooth grooves 12 are disengaged, the first arc frame 7 and the second arc frame 8 can slide relative to each other.

[0030] A connecting tube 15 is provided inside the second arc frame 8 for the lifting rod 14 to pass through, and a limit block 16 for limiting the movement of the lifting rod 14 is provided near the bottom of the inner cavity of the connecting tube 15. A sliding column 17 is provided on the outer surface of the connecting tube 15, and a connecting groove for the sliding column 17 to move is provided on the inner side wall of the first arc frame 7. The lifting rod 14 passes upward from the bottom of the second arc frame 8 and is hinged to the pressure handle 13, and the bottom of the lifting rod 14 is in contact with the limit block 16 in the connecting tube 15.

[0031] The working principle of the utility model is as follows: when the device is used, the first arc frame 7 is first separated from the second arc frame 8, and the patient's head passes through the first arc frame 7 and the second arc frame 8. By pulling the second arc frame 8 to rotate inside the first arc frame 7, the flexible belt 5 connected to the first arc frame 7 is bent. After adjusting to a suitable bending angle, the pressing handle 13 is rotated to squeeze the portion with a convex end of the pressing block 9 to move downward, so that the tooth groove 12 at the bottom of the pressing block 9 is engaged with the tooth block 11, and the lifting rod 14 moves upward to squeeze the bottom of the second arc frame 8 to force it upward to make it doubly fixed, support the patient's neck, make it difficult for the head to deviate, and improve the head fixation effect to a certain extent.

[0032] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0033] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description. Therefore, it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the utility model, and any figure marks in the claims should not be regarded as limiting the claims involved.

[0034] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A head fixing device for oral CT imaging, characterized in that: The invention comprises a backing plate (2) located at one side of an oral CT machine (1), a fixing plate (3) being fixedly mounted on the backing plate (2), an arc-shaped plate (4) and a flexible belt (5) being respectively provided on the fixing plate (3) for supporting the head and neck, a sliding groove (6) for the flexible belt (5) to slide being provided on the arc-shaped plate (4), and a locking component for driving the flexible belt (5) to slide along the sliding groove (6) being further provided on one side of the fixing plate (3).

2. The head fixing device for oral CT imaging according to claim 1, characterized in that: The locking assembly comprises a first arc frame (7), a second arc frame (8), a pressure block (9) and a pressing assembly. The second arc frame (8) and the first arc frame (7) are respectively fixed to the flexible belt (5) and one end of the fixed plate (3). One end of the second arc frame (8) is located in the inner cavity of the first arc frame (7). The top of the first arc frame (7) is provided with a movable groove (10) for the pressure block (9) to move. The first arc frame (7) is provided with a plurality of tooth blocks (11) on both sides of the top of the movable groove (10). The bottom of the pressure block (9) is provided with a tooth groove (12) matching the tooth block (11). The first arc frame (7) is also provided with a pressing assembly for pushing the movement.

3. The head fixing device for oral CT imaging according to claim 2, characterized in that: The pressing assembly comprises a pressing handle (13), one end of which has a protrusion, and the protruding end of the pressing handle (13) is in contact with the top of the pressing block (9), and the end of the pressing handle (13) having the protrusion is hinged with a lifting rod (14), and the end of the lifting rod (14) away from the pressing handle (13) passes through the first arc frame (7) and the second arc frame (8), respectively, and the bottom of the lifting rod (14) is in contact with the bottom of the second arc frame (8).

4. The head fixing device for oral CT imaging according to claim 3, characterized in that: A connecting tube (15) is provided inside the second arc-shaped frame (8) for the lifting rod (14) to pass through, a limit block (16) for limiting the movement of the lifting rod (14) is also provided near the bottom of the inner cavity of the connecting tube (15), and a sliding column (17) is provided on the outer surface of the connecting tube (15).

5. The head fixing device for oral CT imaging according to claim 4, characterized in that: The inner side wall of the first arc-shaped frame (7) is provided with a connecting groove for the sliding column (17) to move.

6. The head fixing device for oral CT imaging according to claim 5, characterized in that: The top of the backrest (2) is also provided with a headrest pad (18) for placing the head.

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