Head auxiliary stabilizing device for CT department detection

Abstract

The invention discloses an auxiliary head stabilizing device for CT department detection, and relates to the technical field of medical auxiliary instruments, the auxiliary head stabilizing device comprises a trapezoidal supporting box, a neck supporting pillow, a head protecting support and an adjusting assembly, the trapezoidal supporting box is provided with a groove and a through hole, the neck supporting pillow and the head protecting support are arranged on the supporting box, and the adjusting assembly is arranged in the supporting box; comprising a moving plate connected to the bottom wall of the supporting box in a sliding mode, a pushing rod is hinged to the moving plate, the other end of the pushing rod penetrates through the through hole and is hinged to the head protection support, the moving plate is further connected with a pushing part, the pushing part is connected with the neck supporting pillow, and the position of the neck supporting pillow is adjusted through the pushing part. The head protection pillow has the advantages that the head protection support and the neck supporting pillow are arranged, so that auxiliary supporting force is provided for the head and the neck of a patient; the adjusting assembly is arranged, and the height of the neck supporting pillow is adjusted while the angle of the head protection support is adjusted, so that the whole equipment better fits the physiological curve of the neck of the patient, the detection process is more stable, and the detection precision is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical auxiliary equipment, and in particular to a head auxiliary stabilization device for CT department detection. Background Art

[0002] In modern medical imaging diagnosis, CT (computed tomography) is an important detection method and is widely used in the diagnosis of head diseases. During a CT scan, the patient's head needs to remain stable to ensure the clarity and accuracy of the image.

[0003] In existing head medical assist devices, a hard pillow with a fixed height is usually used to support the patient's head. This design has significant limitations.

[0004] First, the rigid fixed design makes it impossible to adjust the head deflection angle according to the location of the patient's lesion, making it difficult to achieve the optimal imaging posture in specific areas; second, the lack of effective support for the neck causes muscle fatigue and discomfort in patients due to long-term suspension, inducing involuntary head micro-movements, which becomes an important cause of artifacts during CT examinations.

[0005] The information disclosed in this background technology section is only intended to enhance understanding of the overall background of the invention and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the above-mentioned defects and provide a head auxiliary stabilization device for CT department detection.

[0007] To solve the above technical problems, the present invention provides a technical solution: a head auxiliary stabilization device for CT department detection, comprising:

[0008] A support box having grooves and through holes;

[0009] A neck support pillow and a head support, wherein the neck support pillow is arranged in a groove of the support box, and the head support support is hinged to the rear end of the support box;

[0010] The adjustment component is arranged in the support box and includes a movable plate slidably connected to the bottom wall of the support box. A pushing rod is hinged on the movable plate. The other end of the pushing rod passes through the through hole and is hinged to the head guard. A pushing part is also connected to the movable plate. The pushing part is connected to the neck support pillow, and the position of the neck support pillow is adjusted by the pushing part.

[0011] A further preferred solution of the present invention is that: sliding grooves are provided on both side walls of the groove, and stop blocks are slidably connected in the sliding grooves, and both stop blocks are fixedly connected to the neck support pillow.

[0012] A further preferred embodiment of the present invention is that the pushing portion comprises a trapezoidal pushing block and a pushing box enclosing the pushing block, the inner wall of the pushing box is trapezoidal in shape, and the inclined surface of the pushing block fits in with the inclined top wall of the pushing box.

[0013] A further preferred solution of the present invention is that the pushing block is connected to the movable plate through a support frame, the top of the pushing box is fixedly connected to at least two connecting blocks, and the side of the connecting block away from the pushing box passes through the top wall of the support box and is fixedly connected to the neck support pillow.

[0014] A further preferred solution of the present invention is: two tooth plates are connected to the movable plate, the two tooth plates are symmetrically arranged with the neck support pillow as the center, the tooth plates are engaged with transmission gears, and the separated sides of the two transmission gears are fixedly connected with a rotating shaft, and the rotating shaft is rotatably connected to the support box.

[0015] A further preferred solution of the present invention is that: rotating handles are provided on the separated sides of the two rotating shafts, and the rotating handles on each side are connected to the corresponding rotating shaft through a limiting structure;

[0016] The limiting structure includes a connecting shaft fixedly connected to the rotating handle, a positioning groove is provided on the rotating shaft, and at least two limiting grooves are provided on the inner wall of the positioning groove, the connecting shaft is inserted into the positioning groove, and two limiting blocks are fixedly connected to the connecting shaft, and the limiting blocks are slidably connected to the limiting groove, the connecting shaft and the side wall of the positioning groove are connected by a reset spring, and a telescopic rod is provided in the reset spring, and the two ends of the telescopic rod are respectively connected to the connecting shaft and the side wall of the positioning groove.

[0017] A further preferred solution of the present invention is: the limiting structure also includes a plurality of limiting shafts fixedly connected to the rotating handle, and the plurality of limiting shafts are evenly spaced and arranged around the connecting shaft, and a plurality of slots are opened in the corresponding area on one side of the support box, and the limiting shafts are inserted into the corresponding slots.

[0018] A further preferred solution of the present invention is that: indicator blocks are fixedly connected to the two rotating handles, scales are provided on both sides of the support box, and the indicator blocks point to the scales.

[0019] Compared with the prior art, the present invention has the following advantages including but not limited to:

[0020] 1. By rotating the head support, the patient's head can be rotated to different angles according to actual conditions, thereby improving the detection accuracy; at the same time, a neck support pillow is set to abut against the patient's neck, thereby reducing the patient's neck from hanging in the air and avoiding the artifacts caused by the patient shaking his head due to the hanging.

[0021] 2. An adjustment component is provided to link the head support and neck pillow. When adjusting the angle of the head support, the height of the neck pillow can also be adjusted, making the device fit the physiological curve of the patient's neck better, avoiding secondary suspension or excessive squeezing of the patient's neck.

[0022] In summary, the head auxiliary stabilization device for CT department detection provided by the present invention provides auxiliary support for the patient's head and neck, making the detection process more stable, thereby improving the accuracy of the detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 The present invention is a three-dimensional Figure 1 ;

[0025] Figure 2 The present invention is a three-dimensional Figure 2 ;

[0026] Figure 3 The structure of the present invention Figure 1 ;

[0027] Figure 4 The structure of the present invention Figure 2 ;

[0028] Figure 5 is a schematic diagram of some adjustment components in the present invention;

[0029] Figure 6 It is a structural diagram of the limiting structure in the present invention.

[0030] As shown in the figure:

[0031] 1. Support box; 101. Groove; 102. Through hole; 103. Slide; 104. Stop block;

[0032] 2. Neck support pillow; 3. Head support pillow;

[0033] 4. Adjustment assembly; 401. Moving plate; 402. Push rod; 403. Tooth plate; 404. Transmission gear; 405. Rotating shaft; 406. Rotating handle; 407. Indicator block; 408. Scale;

[0034] 5. Pushing part; 501. Pushing block; 502. Pushing box; 503. Support frame; 504. Connecting block;

[0035] 6. Limiting structure; 601. Connecting shaft; 602. Positioning slot; 603. Limiting slot; 604. Limiting block; 605. Return spring; 606. Telescopic rod; 607. Limiting shaft; 608. Slot. DETAILED DESCRIPTION

[0036] Here, exemplary embodiments will be described in detail, and examples thereof are shown in the accompanying Figure 1 To the attached Figure 6 In the following description, when referring to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices consistent with certain aspects of the present disclosure as detailed in the appended claims.

[0037] As mentioned above, existing technologies have two drawbacks: first, the existing pillows are rigidly fixed in design, and cannot adjust the head deflection angle according to the patient's lesion location, making it difficult to achieve the optimal imaging posture in specific areas; second, the neck lacks effective support, and the patient suffers from muscle fatigue and discomfort due to prolonged suspension in the air, inducing involuntary head movements.

[0038] In view of this, the present invention provides a head auxiliary stabilization device for CT department detection to solve this problem.

[0039] The present invention provides a physical and chemical auxiliary device, which solves this problem in the field of medical auxiliary equipment.

[0040] The present invention is solved by the following methods:

[0041] First embodiment:

[0042] Please refer to the instruction manual Figure 1 To the attached Figure 4 This embodiment discloses a head stabilization device for CT scans. It comprises a support box 1, a neck support pillow 2, and a head support 3. The support box 1 is trapezoidal in shape; the neck support pillow 2 has a raised curved block on its upper portion, and the outer wall of the curved block is coated with a layer of silicone. Furthermore, the head support 3 has a circular placement groove at the top to facilitate the patient's head resting on the support 3.

[0043] The top of the support box 1 is provided with a groove 101. The neck support pillow 2 is arranged in the groove 101 on the top of the support box 1. At the same time, the two side walls of the groove 101 are provided with a slide groove 103. A stop block 104 is slidably connected in each slide groove 103. The adjacent sides of the two stop blocks 104 are fixedly connected to the neck support pillow 2. In this way, the height of the neck support pillow 2 can be adjusted within a limited range without falling out of the groove 101.

[0044] Then, the head support 3 is hinged on the top of the rear end of the support box 1, namely the top of the inclined plane. Simultaneously, a through hole 102 is offered in the middle part of the rear end of the support box 1.

[0045] Finally, an adjustment component 4 is provided on the bottom wall of the support box 1 , which simultaneously connects the neck support 2 and the head support 3 and is used to adjust the angle of the head support 3 and change the height of the neck support 2 in the groove 101 .

[0046] Furthermore, when in use, let the patient's head rest on the head support 3 first, and then the protrusion of the neck support 2 abuts against the patient's neck to reduce the hanging of the patient's neck. When it is necessary to adjust the angle of the patient's head, use the adjustment component 4 to adjust the position of the head support 3, and then adjust the patient's head to a suitable angle. As the patient's head rotates, his neck will also bend accordingly, and then a gap will be created between the neck support 2 and the patient's neck. However, through the linkage effect of the adjustment component 4, while changing the angle of the head support 3, the height of the neck support 2 can also be changed in real time, so that the neck support 2 always abuts against the patient's neck. In the process of detection, the patient's head is more stable and will not shake, so that subsequent detection is more accurate and the occurrence of artifacts is reduced.

[0047] Second embodiment:

[0048] In order to more clearly and completely explain the specific way in which the adjustment component 4 connects the neck support 2 and the head support 3 in the first embodiment, as well as the working principle of the linkage between the height adjustment of the neck support 2 and the rotation of the head support 3, the present invention also provides a second embodiment, please refer to the appendix of the specification. Figure 2 To the attached Figure 5 In another preferred embodiment of the present invention, the adjustment assembly 4 includes a movable plate 401 disposed in the support box 1. The bottom end of the movable plate 401 is connected to the bottom wall of the support box 1 by a sliding connection, so that the movable plate 401 can only move forward and backward on the bottom wall of the support box 1.

[0049] A push rod 402 is hingedly connected to the middle of the rear end of the top of the adjustment assembly 4. The other end of the push rod 402 first passes through the through hole 102 of the support box 1 and is then hinged to the bottom end of the head guard 3. Therefore, when the movable plate 401 moves forward and backward, the push rod 402 can push the head guard 3 to rotate.

[0050] At the same time, a pushing portion 5 is provided in the middle of the front side of the top end of the movable plate 401 , and the pushing portion 5 is connected to the neck support pillow 2 .

[0051] Specifically, the pushing portion 5 includes a pushing block 501 and a pushing box 502. The inner cavity of the pushing box 502 faces downward and encloses the pushing block 501 therein. It should also be noted that the pushing block 501 is trapezoidal in shape, with the inclined surface of the pushing block 501 at the top, and the inclined surface is lower in the front and higher in the back. The inner cavity of the pushing box 502 is also trapezoidal in shape, with the inclined surface at the top, meaning that the top wall of the pushing box 502 is an inclined surface, and the inclined surface is also lower in the front and higher in the back. When the pushing block 501 is disposed within the pushing box 502, the inclined surface at the top of the pushing block 501 abuts the inclined surface of the top wall of the pushing box 502.

[0052] The bottom end of the push block 501 is fixedly connected to a support frame 503, and the bottom end of the support frame 503 is fixedly connected to the top end of the movable plate 401. At the same time, at least two connecting blocks 504 are fixedly connected to the top end of the push box 502. The top ends of the connecting blocks 504 pass through the top wall of the support box 1 and are fixedly connected to the neck support pillow 2 in the groove 101. It should be understood that the connecting blocks 504 can move up and down on the support box 1.

[0053] Furthermore, when the movable plate 401 moves forward and backward, through the cooperation of the pushing block 501 and the pushing box 502, the pushing box 502 and the connecting block 504 can push the neck support pillow 2 to adjust the height.

[0054] In addition, tooth plates 403 are fixedly connected to both sides of the top of the movable plate 401, and a transmission gear 404 is meshed at the top of the tooth plate 403 on each side, and blocks are fixedly connected to the front and rear ends of the tooth plate 403. When the transmission gear 404 contacts the block, the rotation of the transmission gear 404 will be restricted, thereby preventing the tooth plate 403 and the transmission gear 404 from disengaging. The separated sides of the two transmission gears 404 are fixedly connected to a rotating shaft 405. At the same time, rotating holes are opened on both sides of the support box 1, and the outer wall of the rotating shaft 405 is rotatably connected to the rotating hole through a bearing.

[0055] Finally, a rotating handle 406 is provided on each side of the two rotating shafts 405, and each rotating handle 406 is connected to the corresponding rotating shaft 405 via a retaining structure 6. Furthermore, a triangular indicator block 407 is fixedly connected to the upper portion of the rotating handle 406, away from the support box 1. A scale 408 is provided on both sides of the support box 1. It should be noted that the scale 408 is in the shape of a circular arc and is arranged around the rotating handle 406. The indicator block 407 points to the scale 408, thereby visualizing the rotation angle of the rotating handle 406.

[0056] During use, the rotating handles 406 on both sides are rotated in a direction away from the head support 3. The rotating handles 406 then drive the transmission gear 404 to rotate together through the limiting structure 6 and the rotating shaft 405. Since the transmission gear 404 is engaged with the toothed plate 403, the toothed plate 403 drives the movable plate 401 to move backward. During this process, the push rod 402 hinged on the movable plate 401 pushes the head support 3 to rotate in the direction of the neck support 2, which makes the patient lower his head.

[0057] During this process, the patient lowers his head, causing the cervical vertebrae at the neck to bulge. The movement of the movable plate 401 also drives the support frame 503 and the pushing block 501 thereon to move backward. Since the pushing block 501 and the pushing box 502 are in contact, and the inclined surface of the top of the pushing block 501 and the inclined surface of the top wall of the pushing box 502 are both lower in front and higher in the back, the pushing block 501 slides along the top wall of the pushing box 502, and the pushing box 502 slides downward under gravity, thereby causing the neck support pillow 2 to descend to the convex position of the patient's cervical curve, which not only closely fits the physiological curve of the neck but also avoids discomfort caused by excessive pressure.

[0058] Similarly, when the transmission gears 404 on both sides rotate toward the side close to the head guard 3, the tooth plate 403 drives the movable plate 401 to slide forward, and then the push rod 402 hinged on the movable plate 401 will drive the head guard 3 to rotate. The direction of rotation of the head guard 3 is that the head guard 3 rotates toward the side away from the neck support pillow 2, and then the head guard 3 will drive the patient to tilt his head back. Since the patient's neck will bend in the process of tilting his head back, a gap will be generated between the neck and the neck support pillow 2.

[0059] However, the movable plate 401 also drives the support frame 503's push block 501 forward. Since the push block 501 is always in contact with the push box 502, the inclined surface of the push block 501 gradually presses against the top wall of the push box 502, causing the push box 502 to drive the connecting block 504 and the neck support pillow 2 upward. This ensures a more snug fit for the neck support pillow 2 and prevents the neck from being suspended again due to the rotation of the head support 3.

[0060] Third embodiment:

[0061] In order to more clearly and completely explain the composition structure and working principle of the limiting structure 6 in the second embodiment, the present invention also provides a third embodiment, please refer to the appendix of the specification. Figure 6 , and combined with the attached Figure 1 To the attached Figure 5 In another preferred embodiment of the present invention, the above-mentioned limiting structure 6 includes a positioning groove 602 opened on the rotating shaft 405, and a connecting shaft 601 is inserted into the positioning groove 602. The side of the connecting shaft 601 away from the transmission gear 404 is fixedly connected to the rotating handle 406.

[0062] At the same time, limiting grooves 603 are opened on the top wall and the bottom wall of the positioning groove 602, and limiting blocks 604 are slidably connected in the limiting grooves 603. The adjacent sides of the two limiting blocks 604 are fixedly connected to the outer wall of the connecting shaft 601.

[0063] A return spring 605 is also located within positioning slot 602. It's important to note that return spring 605 is made of 304 stainless steel, which prevents interference with the equipment during CT scans and prevents artifacts. The two ends of return spring 605 are fixedly connected to the connecting shaft 601 and the sidewalls of positioning slot 602, respectively. Furthermore, a telescopic rod 606 is located within return spring 605, with its two ends fixedly connected to the connecting shaft 601 and the sidewalls of positioning slot 602, respectively.

[0064] Finally, several limiting shafts 607 are fixedly connected to the side of the rotating handle 406 near the support box 1. These limiting shafts 607 are evenly spaced and arranged around the connecting shaft 601. Simultaneously, a corresponding area on one side of the support box 1 is provided with several cylindrical slots 608, which are arranged around the rotating shaft 405. It should be understood that the number of slots 608 and limiting shafts 607 is the same, and the limiting shafts 607 are inserted into the corresponding slots 608.

[0065] Therefore, when the rotating handle 406 is not rotating, the limiting shaft 607 is inserted into the locking groove 608, and the rotating handle 406 will not rotate. In turn, the toothed plate 403 will not drive the movable plate 401 to move. Consequently, the pushing rod 402 hinged on the movable plate 401 will not push the head support 3 to rotate, and the pushing portion 5 will not drive the neck support 2 to move. This ensures the patient's stability during the examination.

[0066] To adjust the position of the head support 3 and neck support 2, the rotating handle 406 is moved away from the support box 1. During this process, the connecting shaft 601, fixedly connected to the rotating handle 406, stretches the return spring 605. Simultaneously, the rotating handle 406 moves the limiting shaft 607 out of the slot 608. Once the limiting shaft 607 is completely removed from the slot 608, the rotation of the rotating handle 406 is no longer restricted.

[0067] Then, the rotating handle 406 is rotated, and the two limit blocks 604 on the connecting shaft 601 squeeze the inner wall of the corresponding limit groove 603, forcing the rotating shaft 405 to rotate, and then the rotating shaft 405 drives the transmission gear 404 to rotate, and the transmission gear 404 continues to drive the gear plate 403 to move.

[0068] When the rotating handle 406 is rotated to the next angle, the rotating handle 406 is released, and the return spring 605 drives the connecting shaft 601 and the rotating handle 406 back to their original positions. Then, the multiple limiting shafts 607 are reinserted into the corresponding slots 608, and the limiting shafts 607 continue to limit the rotation of the rotating handle 406. This also limits the rotation of the head support 3 and the movement of the neck support 2, allowing the device to regain stability.

[0069] In summary, the head auxiliary stabilization device for CT department detection provided by the present invention has at least the following advantages:

[0070] 1. By rotating the head support 3, the patient's head can be rotated to different angles according to actual conditions, thereby improving the detection accuracy; at the same time, a neck support pillow 2 is provided to abut against the patient's neck, thereby reducing the patient's neck from being suspended in the air, avoiding the artifacts caused by the patient shaking his head due to suspension.

[0071] 2. An adjustment component 4 is provided to link the head support 3 and the neck support pillow 2. When adjusting the angle of the head support 3, the height of the neck support pillow 2 can also be adjusted, so that the entire device fits the physiological curve of the patient's neck better, avoiding secondary suspension or excessive squeezing of the patient's neck.

[0072] In summary, the device provided by the present invention provides auxiliary support for the patient's head and neck, making the detection process more stable, thereby improving the accuracy of the detection.

[0073] The present invention and its embodiments are described above. This description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by this and, without departing from the purpose of the present invention, designs structures and embodiments similar to this technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

[0074] The specific implementation methods disclosed herein omit detailed descriptions of known functions and components. To ensure the compatibility of the equipment, the operating methods adopted are consistent with the parameters of commercially available equipment.

Claims

1. A head auxiliary stabilization device for CT department detection, characterized in that: include: A support box (1) having a groove (101) and a through hole (102); A neck support pillow (2) and a head support (3), wherein the neck support pillow (2) is arranged in a groove (101) of the support box (1), and the head support (3) is hinged to the rear end of the support box (1); An adjustment assembly (4) is arranged in the support box (1), comprising a movable plate (401) slidably connected to the bottom wall of the support box (1), a push rod (402) being hinged on the movable plate (401), the other end of the push rod (402) passing through the through hole (102) and hinged on the head support (3), and a push portion (5) is also connected to the movable plate (401), the push portion (5) being connected to the neck support pillow (2), and the position of the neck support pillow (2) is adjusted by the push portion (5).

2. The head auxiliary stabilization device for CT department detection according to claim 1, characterized in that: A sliding groove (103) is provided on both side walls of the groove (101), and a stop block (104) is slidably connected in the sliding groove (103), and the two stop blocks (104) are fixedly connected to the neck support pillow (2).

3. The head auxiliary stabilization device for CT department detection according to claim 1, characterized in that: The pushing portion (5) comprises a trapezoidal pushing block (501) and a pushing box (502) enclosing the pushing block (501). The inner wall of the pushing box (502) is trapezoidal in shape, and the inclined surface of the pushing block (501) is in contact with the inclined top wall of the pushing box (502).

4. The head auxiliary stabilization device for CT department detection according to claim 3, characterized in that: The pushing block (501) is connected to the movable plate (401) via a support frame (503); the top end of the pushing box (502) is fixedly connected to at least two connecting blocks (504); the side of the connecting block (504) away from the pushing box (502) passes through the top wall of the support box (1) and is fixedly connected to the neck support pillow (2).

5. The head auxiliary stabilization device for CT department detection according to claim 1, characterized in that: Two tooth plates (403) are connected to the movable plate (401), and the two tooth plates (403) are symmetrically arranged with the neck support pillow (2) as the center. A transmission gear (404) is meshed with the tooth plates (403), and the separated sides of the two transmission gears (404) are fixedly connected to a rotating shaft (405), and the rotating shaft (405) is rotatably connected to the support box (1).

6. The head auxiliary stabilization device for CT department detection according to claim 5, characterized in that: A rotating handle (406) is provided on the separated sides of the two rotating shafts (405), and the rotating handle (406) on each side is connected to the corresponding rotating shaft (405) through a limiting structure (6); The limiting structure (6) includes a connecting shaft (601) fixedly connected to the rotating handle (406), a positioning groove (602) is provided on the rotating shaft (405), and at least two limiting grooves (603) are provided on the inner wall of the positioning groove (602), the connecting shaft (601) is inserted into the positioning groove (602), two limiting blocks (604) are fixedly connected to the connecting shaft (601), and the limiting blocks (604) are slidably connected to the limiting groove (603), the connecting shaft (601) and the side wall of the positioning groove (602) are connected by a reset spring (605), a telescopic rod (606) is provided in the reset spring (605), and the two ends of the telescopic rod (606) are respectively connected to the connecting shaft (601) and the side wall of the positioning groove (602).

7. The head auxiliary stabilization device for CT department detection according to claim 6, characterized in that: The limiting structure (6) further comprises a plurality of limiting shafts (607) fixedly connected to the rotating handle (406), wherein the plurality of limiting shafts (607) are evenly spaced and arranged around the connecting shaft (601), and a plurality of slots (608) are provided in a corresponding area on one side of the supporting box (1), and the limiting shafts (607) are inserted into the corresponding slots (608).

8. The head auxiliary stabilization device for CT department detection according to claim 6, characterized in that: The two rotating handles (406) are both fixedly connected with an indicator block (407), and both sides of the support box (1) are provided with a scale (408), and the indicator block (407) points to the scale (408).

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