A locator for oral CBCT lateral photography

Abstract

The present invention discloses a positioner for oral CBCT lateral shooting, comprising a turntable, a main linear motion mechanism, a lateral linear motion mechanism, a friction bracket, a friction wheel, and a tension spring. The main linear motion mechanism and the lateral linear motion mechanism are both arranged on the turntable, and the two lateral linear motion mechanisms are symmetrically arranged on both sides of the main linear motion mechanism. The friction bracket is fixedly arranged on the main linear motion mechanism, the friction wheel is fixedly arranged on the lateral linear motion mechanism, the friction bracket and the friction wheel are contacted, and the two lateral linear motion mechanisms are connected by the tension spring. The present invention mainly adopts the linear motion mechanism to ensure the convenience of patient positioning, and uses the spring at the same time to have the function of flexible positioning.

Description

Technical Field

[0001] The present invention relates to the field of oral medical technology, and in particular to a positioner for oral CBCT lateral photography. Background Art

[0002] Oral CBCT technology (Cone beam CT) is the most commonly used cone beam CT in China. The main working principle is: the X-ray generator uses a low radiation dose (usually the tube current is about 10 mA) to perform circular DR (digital projection) around the projection object. Then the data obtained from the "intersection" after multiple (180 to 360 times, depending on the product) digital projections around the projection object are "reconstructed" in the computer to obtain a three-dimensional image.

[0003] At present, lateral patient positioning of oral CBCT is mostly done manually, which has certain operating errors and may cause inaccurate results.

[0004] In view of the above-mentioned defects, the inventors of the present invention finally obtained the present invention after a long period of research and practice. Summary of the invention

[0005] In order to solve the above technical defects, the technical solution adopted by the present invention is to provide a positioner for oral CBCT lateral shooting, including a turntable, a main linear motion mechanism, a side linear motion mechanism, a friction bracket, a friction wheel, and a tension spring. The main linear motion mechanism and the side linear motion mechanism are both arranged on the turntable, and the two side linear motion mechanisms are symmetrically arranged on both sides of the main linear motion mechanism. The friction bracket is fixedly arranged on the main linear motion mechanism, the friction wheel is fixedly arranged on the side linear motion mechanism, the friction bracket and the friction wheel are arranged in contact, and the two side linear motion mechanisms are connected by the tension spring.

[0006] Preferably, the main linear motion mechanism is provided with a forehead positioning slider, and the main linear motion mechanism drives the forehead positioning slider to move linearly. The side linear motion mechanism is provided with an ear end positioning slider, and the side linear motion mechanism drives the ear end positioning slider to move linearly. The moving direction of the forehead positioning slider is perpendicular to the moving direction of the ear end positioning slider.

[0007] Preferably, the friction bracket is provided with an inclined end surface, and the friction wheel is arranged in contact with the inclined end surface.

[0008] Preferably, the main linear motion mechanism includes a stepper screw motor, a forehead positioning slider, a first slider, a second slider, a pressure spring, and a main linear guide; the main linear guide and the stepper screw motor are fixedly arranged on the turntable, the first slider and the second slider are both arranged on the main linear guide, and the first slider and the second slider can both slide freely along the main linear guide, the first slider is threadedly connected to the output shaft of the stepper screw motor, the second slider is arranged between the first slider and the stepper screw motor, one side of the second slider is in contact with the first slider, and the other side of the second slider is connected to the pressure spring, and the pressure spring provides the second slider with an elastic force to move the second slider toward the first slider; the second slider is connected to the forehead positioning slider.

[0009] Preferably, the friction bracket is fixedly arranged on the first sliding block.

[0010] Preferably, two main linear guides are provided, and the two main linear guides are arranged in parallel and symmetrically on both sides of the output shaft of the stepping screw motor, and the first slider and the second slider are arranged on the two main linear guides.

[0011] Preferably, the side linear motion mechanism includes the ear end positioning slider, the third slider, and a side linear guide; the two side linear guides of the two side linear motion mechanisms are collinear, the side linear guides are each provided with the third slider, and the third slider can slide freely along the side linear guide, the friction wheel is provided on the third slider, the ear end positioning slider and the third slider are fixedly connected; the two third sliders are connected by the tension spring, and the tension spring provides an elastic pulling force for the two third sliders to approach each other.

[0012] Preferably, the side linear guide rail and the main linear guide rail are arranged vertically.

[0013] Preferably, the friction bracket is arranged between the two friction wheels, and the friction bracket is provided with two inclined end surfaces, and the friction wheels and the inclined end surfaces are arranged in contact with each other in a one-to-one correspondence.

[0014] Preferably, the turntable is provided with a front side and a back side, the side linear guide rail and the main linear guide rail are both arranged on the back side, and the forehead positioning slider and the ear end positioning slider are both arranged on the front side; the turntable is provided with a first passing groove and a second passing groove, the first passing groove corresponds to the main linear motion mechanism, and the second passing groove corresponds to the side linear motion mechanism.

[0015] Compared with the prior art, the beneficial effect of the present invention is that the present invention mainly adopts a linear motion mechanism to ensure the convenience of patient positioning, and at the same time uses a spring to have a flexible positioning function. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A front view of the structure of the locator taken from the lateral position of the oral CBCT;

[0017] Figure 2 A structural stereogram of the positioner taken from the lateral position of the oral CBCT;

[0018] Figure 3 is a structural front view of the main linear motion mechanism;

[0019] Figure 4 is a structural stereogram of the main linear motion mechanism;

[0020] Figure 5 is a structural front view of the side linear motion mechanism;

[0021] Figure 6 It is a structural stereogram of the side linear motion mechanism.

[0022] The numbers in the figure represent:

[0023] 1-turntable; 2-main linear motion mechanism; 3-side linear motion mechanism; 4-friction bracket; 5-friction wheel; 6-tension spring; 21-stepping screw motor; 22-forehead positioning slider; 23-first slider; 24-second slider; 25-pressure spring; 26-main linear guide; 31-ear end positioning slider; 32-third slider; 33-side linear guide. DETAILED DESCRIPTION

[0024] The above and other technical features and advantages of the present invention are described in more detail below in conjunction with the accompanying drawings.

[0025] like Figure 1 , Figure 2 As shown, Figure 1 A front view of the structure of the locator taken from the lateral position of the oral CBCT; Figure 2The present invention is a structural stereoscopic diagram of the positioner for oral CBCT lateral shooting; the positioner for oral CBCT lateral shooting comprises a turntable 1, a main linear motion mechanism 2, a side linear motion mechanism 3, a friction bracket 4, a friction wheel 5, and a tension spring 6. The main linear motion mechanism 2 and the side linear motion mechanism 3 are both arranged on the turntable 1, and the two side linear motion mechanisms 3 are symmetrically arranged on both sides of the main linear motion mechanism 2. The friction bracket 4 is fixedly arranged on the main linear motion mechanism 2, and the friction wheel 5 is fixedly arranged on the side linear motion mechanism 3. The friction bracket 4 and the friction wheel 5 are arranged in contact with each other, and the two side linear motion mechanisms 3 are connected by the tension spring 6.

[0026] Generally, the main linear motion mechanism 2 is provided with a forehead positioning slider 22, and the main linear motion mechanism 2 drives the forehead positioning slider 22 to move linearly. The side linear motion mechanism 3 is provided with an ear end positioning slider 31, and the side linear motion mechanism 3 drives the ear end positioning slider 31 to move linearly. The moving direction of the forehead positioning slider 22 and the moving direction of the ear end positioning slider 31 are set perpendicularly.

[0027] Preferably, the friction bracket 4 is provided with an inclined end surface, and the friction wheel 5 is arranged in contact with the inclined end surface. When the main linear motion mechanism 2 drives the friction bracket 4 to move linearly, the friction wheel 5 rolls along the inclined end surface, thereby driving the side linear motion mechanism 3 to move linearly.

[0028] like Figure 3 , Figure 4 As shown, Figure 3 is a structural front view of the main linear motion mechanism; Figure 4 It is a structural stereogram of the main linear motion mechanism; the main linear motion mechanism 2 includes a stepping screw motor 21, the forehead positioning slider 22, a first slider 23, a second slider 24, a pressure spring 25, and a main linear guide rail 26.

[0029] The main linear guide 26 and the stepping screw motor 21 are fixedly arranged on the turntable 1, the first slider 23 and the second slider 24 are both arranged on the main linear guide 26, and the first slider 23 and the second slider 24 can slide freely along the main linear guide 26, the first slider 23 is threadedly connected to the output shaft of the stepping screw motor 21, the second slider 24 is arranged between the first slider 23 and the stepping screw motor 21, one side of the second slider 24 is in contact with the first slider 23, and the other side of the second slider 24 is connected to the pressure spring 25, and the pressure spring 25 provides the second slider 24 with an elastic force to move the second slider 24 toward the first slider 23. The second slider 24 is connected to the forehead positioning slider 22. The friction bracket 4 is fixedly arranged on the first slider 23.

[0030] During forehead positioning, the patient stands first, and the stepping screw motor 21 is operated through electrical control to make the forehead positioning slider 22 close to the patch and the patient's forehead. Due to the action of the pressure spring 25, this positioning has a flexible positioning function.

[0031] Preferably, two main linear guide rails 26 are provided, and the two main linear guide rails 26 are arranged in parallel and symmetrically on both sides of the output shaft of the stepping screw motor 21 , and the first slider 23 and the second slider 24 are arranged on the two main linear guide rails 26 .

[0032] like Figure 5 , Figure 6 As shown, Figure 5 is a structural front view of the side linear motion mechanism; Figure 6 It is a structural stereogram of the side linear motion mechanism; the side linear motion mechanism 3 includes the ear end positioning slider 31, the third slider 32, and the side linear guide rail 33.

[0033] The two side linear guide rails 33 of the two side linear motion mechanisms 3 are collinear, the side linear guide rails 33 are both provided with the third slider, and the third slider 32 can slide freely along the side linear guide rail 33, the friction wheel 5 is provided on the third slider 32, and the ear end positioning slider 31 is fixedly connected to the third slider 32. The two third sliders 32 are connected by the tension spring 6, and the tension spring 6 provides an elastic pulling force for the two third sliders 32 to approach each other.

[0034] The side linear guide rail 33 and the main linear guide rail 26 are arranged vertically.

[0035] The friction bracket 4 is arranged between the two friction wheels 5, and the friction bracket 4 is provided with two inclined end faces, and the friction wheel 5 and the inclined end faces are arranged in one-to-one contact. Generally, the distance between the two intersection points of the two inclined end faces on the same horizontal line gradually increases from the main linear motion mechanism 2 to the side linear motion mechanism 3, so that when the friction bracket 4 moves axially along the output shaft of the stepping screw motor 21, the distance between the two friction wheels 5 changes, thereby realizing the adjustment of the distance between the two ear end positioning sliders 31.

[0036] The friction bracket 4 can be configured as an integral frame having two symmetrical inclined end faces, or can be configured as two symmetrical sub-frames, each of which is provided with one inclined end face. The integral frame is fixedly connected to both of the first sliders 23, and the two sub-frames are fixedly connected to the two first sliders 23 in a one-to-one correspondence.

[0037] When the motor is working, the edge of the friction bracket 4 and the friction wheel 5 drive each other, so that the third slider 32 installed on the side linear guide 33 moves left and right, and then drives the ear end positioning slider 31 installed on the third slider 32 to move left and right. When the stepping screw motor 21 works through electrical control, due to the driving action between the friction bracket 4 and the friction wheel 5, the two third sliders 32 on the symmetrically arranged side linear motion mechanism 3 move toward each other until they are in contact with the patient's ear end. Because the tension spring 6 is arranged between the left and right third sliders 32, this positioning has a flexible positioning function.

[0038] Generally, the rotating disk 1 is provided with a front side and a back side, the side linear guide rail 33 and the main linear guide rail 26 are both provided on the back side, and the forehead positioning slider 22 and the ear end positioning slider 31 are both provided on the front side. Preferably, the rotating disk 1 is provided with a first through slot and a second through slot, the first through slot is provided corresponding to the main linear motion mechanism 2, and the second through slot is provided corresponding to the side linear motion mechanism 3. Specifically, the second slider 24 located on the back side passes through the first through slot and is connected to the forehead positioning slider 22 located on the front side, and the third slider 32 located on the back side passes through the second through slot and is connected to the ear end positioning slider 31 located on the front side.

[0039] The first passing groove is disposed between the two main linear guide rails 26 , and the first passing groove is disposed parallel to the main linear guide rails 26 ; the second passing groove is disposed parallel to the side linear guide rail 33 .

[0040] The present invention mainly adopts a linear motion mechanism to ensure the convenience of patient positioning, and at the same time uses a spring to have a flexible positioning function.

[0041] The above description is only a preferred embodiment of the present invention, which is only illustrative and not restrictive of the present invention. Those skilled in the art understand that many changes, modifications, and even equivalences may be made to the present invention within the spirit and scope defined by the claims of the present invention, but all of them will fall within the scope of protection of the present invention.

Claims

1. A locator for oral CBCT lateral photography, characterized in that: It includes a rotating disk, a main linear motion mechanism, a side linear motion mechanism, a friction bracket, a friction wheel, and a tension spring. The main linear motion mechanism and the side linear motion mechanism are both arranged on the rotating disk, and the two side linear motion mechanisms are symmetrically arranged on both sides of the main linear motion mechanism. The friction bracket is fixedly arranged on the main linear motion mechanism, the friction wheel is fixedly arranged on the side linear motion mechanism, the friction bracket and the friction wheel are arranged in contact, and the two side linear motion mechanisms are connected by the tension spring. The main linear motion mechanism is provided with a forehead positioning slider, and the main linear motion mechanism drives the forehead positioning slider to move linearly. The side linear motion mechanism is provided with an ear end positioning slider, and the side linear motion mechanism drives the ear end positioning slider to move linearly. The moving direction of the forehead positioning slider is perpendicular to the moving direction of the ear end positioning slider. The friction bracket is provided with an inclined end surface, and the friction wheel is arranged in contact with the inclined end surface; The main linear motion mechanism includes a stepper screw motor, a forehead positioning slider, a first slider, a second slider, a pressure spring, and a main linear guide; the main linear guide and the stepper screw motor are fixedly arranged on the turntable, the first slider and the second slider are both arranged on the main linear guide, and the first slider and the second slider can both slide freely along the main linear guide, the first slider is threadedly connected to the output shaft of the stepper screw motor, the second slider is arranged between the first slider and the stepper screw motor, one side of the second slider is in contact with the first slider, and the other side of the second slider is connected to the pressure spring, and the pressure spring provides the second slider with an elastic force to move the second slider toward the first slider; the second slider is connected to the forehead positioning slider; The friction bracket is fixedly arranged on the first sliding block; Two main linear guides are provided, and the two main linear guides are parallel and symmetrically arranged on both sides of the output shaft of the stepping screw motor, and the first slider and the second slider are provided on the two main linear guides; the side linear motion mechanism includes the ear end positioning slider, the third slider, and the side linear guide; the two side linear guides of the two side linear motion mechanisms are collinear, and the third slider is provided on the side linear guide, and the third slider can slide freely along the side linear guide, the friction wheel is arranged on the third slider, and the ear end positioning slider and the third slider are fixedly connected; the two third sliders are connected by the tension spring, and the tension spring provides an elastic pulling force for the two third sliders to approach each other.

2. The locator for oral CBCT lateral photography according to claim 1, characterized in that: The side linear guide rail and the main linear guide rail are arranged vertically.

3. The locator for oral CBCT lateral photography according to claim 1, characterized in that: The friction bracket is arranged between the two friction wheels, and the friction bracket is provided with two inclined end surfaces, and the friction wheels and the inclined end surfaces are arranged in contact with each other in a one-to-one correspondence.

4. The locator for oral CBCT lateral photography according to claim 1, characterized in that: The turntable is provided with a front side and a back side, the side linear guide rail and the main linear guide rail are both arranged on the back side, and the forehead positioning slider and the ear end positioning slider are both arranged on the front side; the turntable is provided with a first through groove and a second through groove, the first through groove corresponds to the main linear motion mechanism, and the second through groove corresponds to the side linear motion mechanism.

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