A jaw support head clamp mechanism and an oral CBCT device

Abstract

The present invention discloses a jaw support head clamp mechanism and an oral CBCT device. The jaw support head clamp mechanism includes a jaw support, a base, a bite plate, a slide bar arranged vertically, and a head clamp assembly. The jaw support and the slide bar are both fixedly connected to the base, and the bite plate can slide up and down relative to the jaw support. The head clamp assembly includes a base assembly, forehead side positioning devices, and a forehead top positioning device. The base assembly is slidably arranged on the slide bar, and a chute is arranged horizontally in the middle part thereof. The forehead side positioning devices include an opening and closing push rod, a left swing arm, and a right swing arm. The opening and closing push rod can slide along the chute and is configured to tighten or open the left swing arm and the right swing arm for limiting both sides of the forehead. The forehead top positioning device includes a spring piece and a forehead top plate that can slide up and down for limiting the upper part of the forehead. The present invention can comprehensively limit the freedom degree of the patient's head and can improve the shooting accuracy and efficiency when applied to an oral CBCT device.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a jaw support head clamp mechanism and an oral CBCT device. Background

[0002] As an X-ray imaging device, oral CBCT (Cone beam CT) has played a huge role in the medical field since the early 21st century. The cone beam volume images obtained by this technology can help clinicians diagnose patients better. In actual clinical applications, CBCT technology effectively solves problems such as image overlap and distortion in two-dimensional imaging, and solves most medical problems in dental implantology, maxillofacial surgery, dental and periodontal diseases, etc. through three-dimensional imaging. This technology is of great significance for the future development and research in the medical field.

[0003] During the shooting process, it is necessary to adjust and position the patient's head through a jaw support mechanism to achieve accurate detection of the position to be measured. However, in the existing jaw support mechanism during use, the lower part is placed on the jaw support mechanism and the patient bites the bite plate for positioning. It is easy for the patient to shift or tilt the head, resulting in the medical staff needing to adjust the patient's head position multiple times or affecting the shooting quality. Chinese Patent Publication No. 202010686999.5 discloses a multi-mode oral CBCT device, in which the jaw support mechanism drives the bilateral cheek orthotropic rods to synchronously stick to the patient's face through an angle automatic adjustment mechanism to assist in positioning the patient's skull, but it still cannot restrict the displacement of the head in all directions, and small-distance forward and backward movement or small-angle tilt of the patient's head can still be found; in addition, the jaw support mechanism in this patent cannot form the closest connection with the rotating imaging component, affecting the imaging effect.

[0004] The disclosure of the above background technical content is only used to assist in understanding the inventive concept and technical solution of the present invention, and it does not necessarily belong to the prior art of this patent application, nor will it necessarily give technical guidance; in the case where there is no clear evidence indicating that the above content was publicly available before the filing date of this patent application, the above background technology should not be used to evaluate the novelty and inventiveness of this application. Summary of the Invention

[0005] The purpose of the present invention is to provide a jaw support head clamp mechanism and an oral CBCT device, which can position the patient's head and restrict the degrees of freedom of the head in all directions, avoiding the influence on the shooting quality due to the movement of the patient's head or repeatedly adjusting the patient's head.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0007] A jaw support head clamp mechanism includes a jaw support, a base for fixing the jaw support, and a bite plate movably connected to the jaw support. It also includes a sliding rod and a head clamp assembly. The sliding rod is arranged vertically, and its lower end is fixedly connected to the base. The head clamp assembly is slidably arranged on the sliding rod.

[0008] The head clamp assembly includes a base component, forehead side positioning devices, and a forehead top positioning device. The base component is slidably arranged on the sliding rod, and a chute is arranged horizontally in the middle part thereof.

[0009] The forehead side positioning devices include an opening and closing push rod, a left swing arm and a right swing arm arranged on both sides of the opening and closing push rod. The opening and closing push rod is slidably arranged along the chute. The left swing arm and the right swing arm are both rotatably connected to the opening and closing push rod. When the opening and closing push rod slides towards one end of the chute, the distance between the left swing arm and the right swing arm becomes smaller. When the opening and closing push rod slides towards the other end of the chute, the distance between the left swing arm and the right swing arm becomes larger.

[0010] The forehead top positioning device includes a forehead top plate and a spring piece. The forehead top plate passes through the base component and is slidably connected to the base component up and down. The spring piece is arranged between the base component and the forehead top plate and is configured to press the forehead top plate towards the forehead direction.

[0011] Further, based on any one of the foregoing technical solutions or a combination of multiple technical solutions, the forehead side positioning devices further include two chuck swing rods. The two chuck swing rods are symmetrically arranged on the left and right sides of the forehead side positioning devices, and one chuck swing rod is rotatably connected to the left swing arm, and the other chuck swing rod is rotatably connected to the right swing arm.

[0012] The chuck swing rod is provided with a curved concave surface, and the curved concave surfaces of the two chuck swing rods are both arranged towards the middle position of the forehead side positioning devices.

[0013] Further, based on any one of the foregoing technical solutions or a combination of multiple technical solutions, the forehead top plate is arc-shaped, its arc-shaped concave surface faces the direction of the forehead, and first elastic pads are arranged at both ends thereof. The first elastic pads are fixedly connected to the forehead top plate.

[0014] The first elastic pad is made of rubber / nylon / resin.

[0015] Further, based on any one of the foregoing technical solutions or a combination of multiple technical solutions, second elastic pads are arranged at both ends of the chuck swing rod. The second elastic pads are fixedly connected to the chuck swing rod.

[0016] The second elastic pad is made of rubber / nylon / resin.

[0017] Further, based on any one of the foregoing technical solutions or a combination of multiple technical solutions, the base assembly includes a base and a cover plate fixedly connected, and the opening and closing push rod is disposed between the base and the cover plate;

[0018] At least one horizontal chute is provided on the cover plate, and a guide post is fixedly provided on the opening and closing push rod, and the guide post is correspondingly disposed in the chute; or,

[0019] At least one horizontal chute is provided on the base, and two guide posts are fixedly provided on the opening and closing push rod, and the two guide posts are correspondingly disposed in the chute.

[0020] Further, based on any one of the foregoing technical solutions or a combination of multiple technical solutions, the base assembly includes a base and a cover plate fixedly connected, the base and / or the cover plate are slidably connected to the slide rod, and the forehead top plate passes through the base and the cover plate and can slide up and down along the base and the cover plate.

[0021] Further, based on any one of the foregoing technical solutions or a combination of multiple technical solutions, there are two slide rods, which are symmetrically disposed on the left and right sides of the base, and the left and right sides of the base assembly correspondingly pass through the slide rods and are slidably connected to the slide rods;

[0022] A spring piece is provided at the connection between the slide rod and the base assembly, and the spring piece is fixedly provided in the base assembly and presses the base assembly against the slide rod.

[0023] Further, based on any one of the foregoing technical solutions or a combination of multiple technical solutions, the forehead side positioning device further includes an adjusting bolt and a baffle connected by rotation, the axis of the adjusting bolt is arranged in the horizontal direction, and the baffle is fixedly connected to the base assembly;

[0024] The threaded end of the adjusting bolt passes through the baffle and is threadedly connected to the opening and closing push rod, and the nut of the adjusting bolt is disposed outside the baffle.

[0025] Further, based on any one of the foregoing technical solutions or a combination of multiple technical solutions, it further includes a mounting top plate, and the mounting top plate is fixedly connected to the upper end of the slide rod.

[0026] According to another aspect of the present invention, the present invention provides an oral CBCT device, including a lifting support, a rotating imaging assembly, and the jaw support head clamping mechanism. The upper end of the lifting support is provided with a liftable cantilever. The rotating imaging assembly is arranged at the lower end of the cantilever and is selectively connected to the cantilever. The upper end of the jaw support head clamping mechanism is fixedly connected to the cantilever and is arranged at the middle position of the rotating imaging assembly.

[0027] The beneficial effects brought by the technical solution provided by the present invention are as follows:

[0028] a. The jaw support head clamping mechanism provided by the present invention realizes accurate positioning of the patient's head and comprehensively restricts the degrees of freedom of the head through the jaw support, bite plate, forehead top plate, and the left and right swing arms of the forehead side positioning devices, avoiding the influence on the shooting quality due to the movement of the patient's head and also avoiding the need for medical staff to repeatedly adjust the patient's head due to the movement of the patient's head.

[0029] b. For the jaw support head clamping mechanism provided by the present invention, the position of the forehead top plate relative to the base assembly is adjustable, the distance between the left and right swing arms is adjustable, and swing rods are provided on both the left and right swing arms, which can be self-adjusted according to the heads of different patients. The jaw support head clamping mechanism has high flexibility, is suitable for different patients, and has good versatility.

[0030] c. For the jaw support head clamping mechanism provided by the present invention, the two ends of the forehead top plate are provided with first elastic pads made of elastic materials, and the two ends of the swing rods are provided with second elastic pads made of elastic materials, increasing the friction force, having a good limiting effect on the patient's head, and being highly comfortable.

[0031] d. The oral CBCT device provided by the present invention includes a jaw support head clamping mechanism that comprehensively limits the head, which can improve the shooting accuracy and shooting efficiency. Moreover, the jaw support head clamping mechanism and the rotating imaging assembly can form a connection with the shortest distance, and the imaging effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0033] Figure 1 A three-dimensional schematic diagram of the jaw support head clamping mechanism provided for an exemplary embodiment of the present invention;

[0034] Figure 2 A side view schematic diagram of the jaw support head clamping mechanism provided for an exemplary embodiment of the present invention;

[0035] Figure 3 Schematic structural diagram (excluding the cover plate) of the head clamp assembly provided for an exemplary embodiment of the present invention;

[0036] Figure 4 Front view schematic diagram of the head clamp assembly provided for an exemplary embodiment of the present invention;

[0037] Figure 5 is Figure 4 Cross-sectional schematic diagram shown in the A-A direction in;

[0038] Figure 6 Bottom view schematic diagram of the head clamp assembly provided for an exemplary embodiment of the present invention

[0039] Figure 7 is Figure 6 Cross-sectional schematic diagram shown in the B-B direction in;

[0040] Figure 8 Schematic structural diagram of the oral CBCT device provided for an exemplary embodiment of the present invention.

[0041] Wherein, the reference numerals include: 100-jaw support head clamp mechanism, 101-jaw support, 102-bite plate, 103-slide bar, 104-mounting top plate, 105-base, 400-head clamp assembly, 401-base, 402-cover plate, 403-baffle, 404-opening and closing push rod, 405-adjusting bolt, 406-forehead top plate, 407-first elastic cushion plate, 408-right swing arm, 409-swing rod, 410-second elastic cushion plate, 411-left swing arm, 412-spring piece, 200-lifting support, 300-rotating imaging assembly. Detailed implementation manners

[0042] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0043] It should be noted that the terms "first", "second", etc. in the description, claims and the above-mentioned drawings of the present invention are used to distinguish similar objects and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, device, product or equipment comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or equipment.

[0044] See Figure 1 and Figure 2 The present invention provides a jaw support head clamp mechanism, which includes a jaw support 101, a bite plate 102, a slide bar 103, a mounting top plate 104, a base 105 and a head clamp assembly 400. The slide bar 103 is arranged in the vertical direction, and its upper end is fixedly connected to the mounting top plate 104, and its lower end is fixedly connected to the base 105. The slide bar 103 can be one or two. Preferably, there are two slide bars 103, which are symmetrically arranged on the left and right sides of the base 105. The left and right sides of the base assembly correspondingly pass through the slide bar 103 and are slidably arranged in the vertical direction. The mounting top plate 104 is provided with a mounting hole for fixing the jaw support head clamp mechanism on an oral CBCT (Cone beam CT, cone beam X-ray computed tomography system) device. The base 105 is used to carry and fix the jaw support 101. Specifically, the jaw support 101 can be fixed to the base 105 by screws. The jaw support 101 is movably connected to the bite plate 102, and the bite plate 102 can slide relative to the jaw support 101 in the vertical direction. The head clamp assembly 400 is slidably arranged on the slide bar 103, and the head clamp assembly 400 is used to limit and fix the forehead part of the patient.

[0045] Further, see Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5, the head clamp assembly 400 includes a base assembly, an opening and closing push rod 404, and forehead side positioning devices and a forehead top positioning device. The base assembly is slidably disposed on the slide rod 103, and a chute is provided in the middle portion thereof in the horizontal direction. The opening and closing push rod 404 is slidably disposed along the chute. The forehead side positioning devices include a left swing arm 411 and a right swing arm 408 located on both sides of the chute. The left swing arm 411 and the right swing arm 408 are disposed on both sides of the opening and closing push rod 404 and are both rotatably connected to the opening and closing push rod 404. When the opening and closing push rod 404 slides toward one end of the chute, the distance between the left swing arm 411 and the right swing arm 408 becomes smaller. When the opening and closing push rod 404 slides toward the other end of the chute, the distance between the left swing arm 411 and the right swing arm 408 becomes larger. The forehead top positioning device includes a forehead top plate 406 and a spring piece 412. The forehead top plate 406 passes through the base assembly and is slidably connected to the base assembly in the up and down direction. The spring piece 412 is disposed between the base assembly and the forehead top plate 406 and is configured to press the forehead top plate 406 toward the forehead direction. During the process of positioning the patient's head with the jaw support head clamp mechanism, the patient's chin is placed on the jaw support 101 and the bite plate 102 is bitten, so as to position the patient's chin and oral cavity. Adjust the position of the base assembly on the slide rod 103 so that the forehead top plate 406 abuts against the upper part of the patient's forehead, and the position of the forehead top plate 406 relative to the base assembly can be adjusted up and down and back and forth, so as to adapt to the positioning of the upper end of the foreheads of different patients. Adjust and slide the opening and closing push rod 404 to control the clamping or contraction of the left swing arm 411 and the right swing arm 408 of the forehead side positioning device, so as to position both sides of the patient's forehead. Thus, the jaw support head clamp mechanism provided by the present invention can adjust the patient's head to a position suitable for shooting, and restrict the freedom of the head in all directions of the patient's chin, oral cavity, forehead top and both sides of the forehead, avoiding the influence on the shooting quality due to the movement of the patient's head, and avoiding the need for medical staff to repeatedly adjust the patient's head due to the movement of the patient's head.

[0046] In an embodiment of the present invention, refer to Figure 3 , the forehead side positioning device further includes an adjusting bolt 405 and a baffle 403 that are rotatably connected. The baffle 403 is fixedly connected to the base assembly. The axis of the adjusting bolt 405 is provided in the horizontal direction. The threaded end of the adjusting bolt 405 passes through the baffle 403 and is threadedly connected to the opening and closing push rod 404. The nut of the adjusting bolt 405 is disposed outside the baffle 403, and the adjusting bolt 405 can rotate freely relative to the baffle 403. Refer to Figure 3 and Figure 4, the base assembly includes a base 401 and a cover plate 402 fixedly connected thereto. The opening and closing push rod 404 is disposed between the base 401 and the cover plate 402. At least one horizontal chute is provided on the cover plate 402. Guide posts are fixedly provided correspondingly on the opening and closing push rod 404, and the guide posts are correspondingly disposed in the chutes, so that the opening and closing push rod 404 can slide horizontally along the chutes. Preferably, two chutes are provided on the cover plate 402 and are symmetrically disposed on the left and right sides thereof. Two guide posts are correspondingly provided on the opening and closing push rod 404, and the two guide posts are correspondingly disposed in the two chutes to prevent the opening and closing push rod 404 from tilting when sliding horizontally.

[0047] In another embodiment of the present invention, different from the above embodiment in which the chute is provided on the cover plate 402, two horizontal chutes are provided on the base 401, and two guide posts are fixedly provided on the opening and closing push rod 404, and the two guide posts are correspondingly disposed in the chutes.

[0048] In one embodiment of the present invention, refer to Figure 3, rotating shafts are provided on both sides of the opening and closing push rod 404. A first waist-shaped hole is provided on the left swing arm 411, and the first waist-shaped hole is connected to the left rotating shaft of the opening and closing push rod 404; a second waist-shaped hole is provided on the right swing arm 408, and the second waist-shaped hole is connected to the right rotating shaft of the opening and closing push rod 404. Further, the positioning device on both sides of the forehead further includes two chuck swing rods 409. The two chuck swing rods 409 are symmetrically arranged on the left and right sides of the positioning device on both sides of the forehead, and one chuck swing rod 409 is rotatably connected to the left swing arm 411, and the other chuck swing rod 409 is rotatably connected to the right swing arm 408; an arc concave surface is provided on the chuck swing rod 409, and the arc concave surfaces of the two chuck swing rods 409 are both arranged towards the middle position of the positioning device on both sides of the forehead. Before shooting, rotate the nut of the adjusting bolt 405 to drive the opening and closing push rod 404 to slide horizontally along the chute towards the direction of the forehead. The left swing arm 411 and the right swing arm 408 tighten towards the middle, driving the two chuck swing rods 409 on both sides to approach the patient's head and automatically adjust to clamp both sides of the patient's head, achieving accurate positioning of the patient's head and restricting the degree of freedom of the head in all directions, avoiding affecting the shooting quality due to the movement of the patient's head, and also avoiding the need for medical staff to repeatedly adjust the patient's head due to the movement of the patient's head; after shooting, rotate the adjusting bolt 405 to drive the opening and closing push rod 404 to slide towards the other end, and the left swing arm 411 and the right swing arm 408 tighten towards the middle, driving the two chuck swing rods 409 on both sides to move away from the patient's head so as to release the limit on both sides of the patient's head. In this embodiment, second elastic pads 410 are provided at both ends of the chuck swing rod 409, and the second elastic pads 410 are fixedly connected to the chuck swing rod 409; the second elastic pads 410 are made of rubber / nylon / resin, which can increase the friction force, have a good limiting effect on the patient's head, and have high comfort.

[0049] In an embodiment of the present invention, refer to Figure 3 、 Figure 4 and Figure 5, the base assembly includes a base 401 and a cover plate 402 with corresponding structures, and the base 401 and the cover plate 402 are fixedly connected by screws. The forehead top plate 406 passes through the base 401 and the cover plate 402 and can slide up and down along the base 401 and the cover plate 402. The forehead top plate 406 is arc-shaped, with its arc concave surface facing the direction of the forehead. A spring piece 412 is provided on the arc convex surface of the forehead top plate 406. The upper end of the spring piece 412 is fixedly connected to the cover plate 402, and the lower end is fixedly connected to the base 401, and it exerts a pressure on the forehead top plate 406 in the direction of the forehead, so that the forehead top plate 406 can exert a pressure on the top of the forehead. First elastic pads 407 are provided at both the upper and lower ends of the forehead top plate 406. The first elastic pads 407 are fixedly connected to the forehead top plate 406. The first elastic pads 407 are made of rubber / nylon / resin, which can increase the friction, have a good limiting effect on the patient's head, and improve comfort.

[0050] In an embodiment of the present invention, refer to Figure 6 and Figure 7 , the base assembly includes a base 401 and a cover plate 402 with corresponding structures, and the base 401 and the cover plate 402 are fixedly connected by screws. A spring piece 412 is provided at the connection of the sliding rod 103 and the base assembly. The spring piece 412 is fixedly arranged inside the base assembly, with the upper end fixedly connected to the cover plate 402 and the lower end fixedly connected to the base 401. The spring piece 412 keeps the base assembly and the sliding rod 103 in a compressed state. Without external force, the head clamp assembly 400 remains stationary relative to the sliding rod 103; under the action of external force, the head clamp assembly 400 can slide up and down along the sliding rod 103.

[0051] According to another aspect of the present invention, refer to Figure 8 , the present invention provides an oral CBCT, which includes a lifting support 200, a rotating imaging assembly 300, and the above-mentioned jaw support head clamp mechanism 100. The upper end of the lifting support 200 is provided with a liftable cantilever. The rotating imaging assembly 300 is arranged at the lower end of the cantilever and is selectively connected to the cantilever. The upper end of the jaw support head clamp mechanism 100 is fixedly connected to the cantilever and is arranged at the middle position of the rotating imaging assembly 300. In a specific embodiment, refer to Figure 1 and Figure 8 , the mounting top plate 104 at the upper end of the jaw support head clamp mechanism 100 is fixedly connected to the cantilever. The oral CBCT device provided by the present invention includes a jaw support head clamp mechanism that limits the head in all directions, which can improve the accuracy and efficiency of shooting, and the jaw support head clamp mechanism and the rotating imaging assembly can form a connection with the shortest distance, resulting in a better imaging effect.

[0052] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0053] The above are only specific embodiments of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A jaw support head clamp mechanism, comprising a jaw support (101) and a base (105) for fixing the jaw support (101), and a bite plate (102) movably connected to the jaw support (101), characterized in that, It further includes a slide rod (103) and a head clamp assembly (400). The slide rod (103) is arranged in the vertical direction, and its lower end is fixedly connected to the base (105). The head clamp assembly (400) is slidably arranged on the slide rod (103). The head clamp assembly (400) includes a base assembly, positioning devices on both sides of the forehead, and a positioning device on the top of the forehead. The base assembly is slidably arranged on the slide rod (103), and a chute is arranged in the horizontal direction at the middle part thereof. The positioning devices on both sides of the forehead include an opening and closing push rod (404), a left swing arm (411) and a right swing arm (408) arranged on both sides of the opening and closing push rod (404). The opening and closing push rod (404) is slidably arranged along the chute. The left swing arm (411) and the right swing arm (408) are both rotatably connected to the opening and closing push rod (404). When the opening and closing push rod (404) slides towards one end of the chute, the distance between the left swing arm (411) and the right swing arm (408) becomes smaller. When the opening and closing push rod (404) slides towards the other end of the chute, the distance between the left swing arm (411) and the right swing arm (408) becomes larger. The positioning device on the top of the forehead includes a forehead top plate (406) and a spring piece (412). The forehead top plate (406) passes through the base assembly and is slidably connected to the base assembly up and down. The spring piece (412) is arranged between the base assembly and the forehead top plate (406) and is configured to press the forehead top plate (406) towards the forehead direction. The positioning devices on both sides of the forehead further include two clamp head swing rods (409). The two clamp head swing rods (409) are symmetrically arranged on the left and right sides of the positioning devices on both sides of the forehead. One clamp head swing rod (409) is rotatably connected to the left swing arm (411), and the other clamp head swing rod (409) is rotatably connected to the right swing arm (408). The clamp head swing rod (409) is provided with a radian concave surface, and the arc concave surfaces of the two clamp head swing rods (409) are both arranged towards the middle position of the positioning devices on both sides of the forehead. It further includes a mounting top plate (104), and the mounting top plate (104) is fixedly connected to the upper end of the slide rod (103).

2. The jaw support head clamp mechanism according to claim 1, characterized in that, The forehead top plate (406) is arc-shaped, its arc concave surface faces the direction of the forehead, and first elastic cushion plates (407) are arranged at both ends thereof. The first elastic cushion plates (407) are fixedly connected to the forehead top plate (406). The first elastic cushion plate (407) is made of rubber / nylon / resin.

3. The jaw support head clamp mechanism according to claim 1, characterized in that, Both ends of the clamp head swing rod (409) are provided with second elastic cushion plates (410), and the second elastic cushion plates (410) are fixedly connected to the clamp head swing rod (409). The second elastic cushion plate (410) is made of rubber / nylon / resin.

4. The jaw support head clamp mechanism according to claim 1, characterized in that, The base assembly includes a base (401) and a cover plate (402) fixedly connected. The opening and closing push rod (404) is arranged between the base (401) and the cover plate (402). At least one horizontal chute is provided on the cover plate (402), and a guide post is fixedly provided on the opening and closing push rod (404), and the guide post is correspondingly arranged in the chute; or, At least one horizontal chute is provided on the base (401), and two guide posts are fixedly provided on the opening and closing push rod (404), and the two guide posts are correspondingly arranged in the chute.

5. The jaw support head clamp mechanism according to claim 1, characterized in that, The base assembly includes a base (401) and a cover plate (402) fixedly connected to each other. The base (401) and / or the cover plate (402) is slidably connected to the sliding rod (103). The forehead top plate (406) passes through the base (401) and the cover plate (402) and can slide up and down along the base (401) and the cover plate (402).

6. The jaw support head clamp mechanism according to claim 1, characterized in that, There are two sliding rods (103), which are symmetrically arranged on the left and right sides of the base (105). The left and right sides of the base assembly correspondingly pass through the sliding rods (103) and are slidably connected to the sliding rods (103); A spring piece (412) is provided at the connection between the sliding rod (103) and the base assembly. The spring piece (412) is fixedly arranged in the base assembly and presses the base assembly against the sliding rod (103).

7. The jaw support head clamp mechanism according to claim 1, wherein, The positioning device on both sides of the forehead further includes an adjusting bolt (405) and a baffle (403) connected by rotation. The axis of the adjusting bolt (405) is arranged in the horizontal direction, and the baffle (403) is fixedly connected to the base assembly; The threaded end of the adjusting bolt (405) passes through the baffle (403) and is threadedly connected to the opening and closing push rod (404). The nut of the adjusting bolt (405) is arranged outside the baffle (403).

8. An oral CBCT, characterized in that, It includes a lifting support (200), a rotating imaging assembly (300) and the jaw support head clamping mechanism (100) according to any one of claims 1 to 7. The upper end of the lifting support (200) is provided with a liftable cantilever. The rotating imaging assembly (300) is arranged at the lower end of the cantilever and is selectively connected to the cantilever. The upper end of the jaw support head clamping mechanism (100) is fixedly connected to the cantilever and is arranged at the middle position of the rotating imaging assembly (300).

Images