CN211094218U - Oral cavity CT headstock and oral cavity CT machine - Google Patents

Abstract

The utility model discloses an oral cavity CT headstock, include: fixing a bracket; the clamping device comprises a left clamping block, a left movable clamp and a first rack, wherein one end of the left movable clamp is fixedly provided with the left clamping block, and the other end of the left movable clamp is fixedly connected with the first rack; the clamping device comprises a right clamping block, a right movable clamp and a second rack, wherein one end of the right movable clamp is fixedly provided with the right clamping block, and the other end of the right movable clamp is fixedly connected with the second rack; the first gear is meshed with the second gear, the first gear is also meshed with the first rack, and the second gear is also meshed with the second rack; the first rack and the second rack are in the same direction; the gear fixing seat is internally and fixedly provided with a gear fixing shaft, and the first gear and the second gear are respectively and rotatably arranged on the corresponding gear fixing shafts. The utility model discloses a structure is succinct, and convenient operation just can accomplish the elasticity to the head through the one hand, has greatly strengthened the convenience and the practicality of operation, has improved the fixed efficiency of patient's posture.

Description

Oral cavity CT headstock and oral cavity CT machine

Technical Field

The utility model relates to an oral cavity CT field, concretely relates to oral cavity CT headstock and oral cavity CT machine.

Background

The oral cavity CT can reflect the tissue condition from a three-dimensional angle, and can find lesions which cannot be found from the projection angle of the oral cavity X-ray film or are finer; the three-dimensional reconstruction effect of the device can accurately evaluate the condition of bone tissues and the condition of the mandibular joint, assist doctors in design of the scheme before operation and perform scientific evaluation after operation (such as the operation of correcting the chin).

When a patient is photographed, the mouth and the head of the subject are required to be immobile for a long time because the machine photographing process is also one or two minutes. Because the mouth opening tongue pressing body position is a forced body position, a patient is difficult to keep still for a long time without the help of external force, and a certain time (tens of seconds to tens of seconds) is needed for photographing the oral cavity CT, so the tongue and palate CT often generates motion artifacts due to the movement of the patient during photographing, the photographing quality is influenced, and even the photographing fails.

To address this problem, the current oral CT machine is usually equipped with a mandible support, which allows the patient's oral cavity to be imaged on the detector by matching the imaging requirements and adjusting the height of the chair. However, the mandible support can only fix the mandible of the patient, but cannot fix the head of the patient, and in the process of shooting, the head of the patient is easy to shake because the patient keeps the same posture for too long time, so that deviation and influence are easily caused on shooting.

Disclosure of Invention

In order to overcome the defects of the prior art, one of the purposes of the utility model is to provide an oral cavity CT headstock which can fix the head of the person to be shot and avoid the influence of the shaking head on the CT imaging quality; the second purpose is to provide an oral cavity CT machine with the oral cavity CT machine head frame, which can fix the head of a shot person and avoid the influence of head shaking on CT imaging quality.

The utility model discloses a following technical scheme realizes:

an oral cavity CT headstock comprises a fixed support, a left clamping block, a left movable clamp and a first rack, wherein the left movable clamp is of an L-shaped structure, one end of the left movable clamp is fixedly provided with the left clamping block, the other end of the left movable clamp is fixedly connected with the first rack, the left movable clamp and the first rack are movably sleeved on the fixed support, the right movable clamp is of a L-shaped structure, one end of the right movable clamp is fixedly provided with the right clamping block, the other end of the right movable clamp is fixedly connected with the second rack, the right movable clamp and the second rack are movably sleeved on the fixed support, a first gear and a second gear are arranged in the gear fixing seat in an engaged mode, the first gear is further engaged with the first rack, the second gear is further engaged with the second rack, the first rack and the second rack are in the same direction, and a gear fixing shaft is fixedly arranged in the gear fixing seat, and can be respectively rotatably arranged on the corresponding gear fixing shaft in the radial direction so as to realize radial fixing.

Further, the first gear and the second gear are both double-layer gears.

Further, the first gear and the second gear have the same number of teeth, and the transmission ratio is 1: 1.

Further, the fixed support is of a U-shaped structure.

Further, the fixed support comprises a circular tube.

Further, the oral cavity CT headstock also comprises a compaction assembly; the pressing assembly is arranged in the gear fixing seat and comprises a pressing bolt, a pressing block and a pressing spring, the pressing spring is arranged on the pressing bolt, the pressing bolt is connected with the pressing block through threads to press the pressing block downwards, and the pressing block is pressed on the first rack.

Furthermore, stud bolts are respectively arranged at two end parts of the fixing support, the stud bolts are L-shaped, and one ends of the stud bolts are in threaded connection with the fixing support and are fixed through nuts.

Further, the oral cavity CT machine head frame also comprises a fixing plate, and the fixing support is fixedly connected to the fixing plate through the stud bolts.

Further, the gear fixing seat comprises a fixing seat upper shell and a fixing seat lower shell; the fixing seat upper shell is located on the upper portion of the fixing support, the fixing seat lower shell is located on the lower portion of the fixing support, and the fixing seat upper shell is fixedly connected with the fixing seat lower shell through screws.

An oral cavity CT machine comprises an oral cavity CT machine head frame.

Compared with the prior art, the utility model discloses the beneficial effect that can reach does: the first rack is meshed with the first gear, the first gear is meshed with the second gear, the second gear is meshed with the second rack, and the first rack and the second rack face opposite to each other; when one clamping block (the left clamping block or the right clamping block) is pushed towards the direction close to the head, the corresponding rack drives the gear on the clamping block to rotate, so that the other gear is driven to rotate in the opposite direction, and the other rack can be driven to move in the opposite direction of pushing; in other words, the first rack and the second rack approach to each other in the direction of the head, so that the distance between the left clamping block and the right clamping block is reduced, and the head is clamped. Conversely, when a single clamping block is pushed to the direction far away from the head, the distance between the two clamping blocks is increased, and the distance between the machine head frame and the machine head frame is adjustable. The utility model ensures that the head of the tested person can not shake easily, ensures that the image imaged by the detector has no moving artifacts, and ensures that the machine obtains a correct three-dimensional model of the oral cavity teeth in the three-dimensional reconstruction; additionally, the utility model discloses a structure is succinct, and convenient operation just can accomplish the elasticity to the head through one hand, and medical staff can adjust patient's head posture through one hand, and the other hand can carry out interval regulation, press from both sides tight fixedly to the headstock simultaneously, has greatly strengthened the convenience and the practicality of operation, has improved the efficiency fixed to patient's posture.

Drawings

FIG. 1 is an overall schematic view of an oral CT machine;

FIG. 2 is a schematic illustration of the two-sided release of the oral CT headstock;

FIG. 3 is a schematic view of the two-sided clamping of an oral CT headstock;

FIG. 4 is an exploded view of an oral CT headstock;

FIG. 5 is a partial schematic view of an oral CT headstock;

FIG. 6 is a front view of FIG. 5;

FIG. 7 is a top view of the first embodiment;

fig. 8 is a top view of the second embodiment.

In the figure: 10. a headstock; 11. fixing a bracket; 12. a left clamping block; 13. a left movable clamp; 14. a first rack; 15. a right clamping block; 16. a right movable clamp; 17. a second rack; 18. a first gear; 19. a second gear; 110. a gear fixing seat; 111. a gear fixing shaft; 112. a fixed seat upper shell; 113. a fixed seat lower shell; 120. a hold-down bolt; 130. a compression block; 140. a compression spring; 150. a stud bolt; 160. a fixing plate; 20. the lower jaw holds in the palm.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," "first," "second," and the like are used hereinafter for descriptive purposes only.

Referring to fig. 1-2, the present invention discloses an oral CT head frame 10 for fixing the head of a patient when taking oral CT, so that it is not easy to shake left and right, thereby affecting the taken image.

Referring to fig. 2-4, the oral CT headstock 10 includes:

and a fixing bracket 11, wherein the fixing bracket 11 is used for fixing the head frame 10 on the oral cavity CT machine and enabling the first rack 14 and the second rack 17 to move thereon, preferably, the fixing bracket 11 is of a U-shaped structure, two end portions of the fixing bracket are respectively provided with a stud bolt 150, the stud bolt 150 is of an L-shaped structure, one section of the stud bolt is in threaded connection with the fixing bracket 11 and is fixed by a nut, and the other section of the stud bolt is in threaded connection with the fixing plate 160 so as to fixedly connect the fixing bracket 11 to the fixing plate 160, and preferably, the fixing bracket 11 comprises a round pipe.

The left clamping block 12, the left movable clamp 13 and the first rack 14 are arranged on the left movable clamp 13, the left movable clamp 13 is in an L-shaped structure, the left clamping block 12 is fixedly arranged at one end of the left movable clamp 13, the first rack 14 is fixedly connected to the other end of the left movable clamp 13, the left movable clamp 13 and the first rack 14 are movably sleeved on the fixed support 11, namely the left movable clamp 13, the left clamping block 12 and the first rack 14 can slide on the fixed support 11 together, and the left clamping block 12 is used for clamping one side of the head of a patient.

The right clamping block 15, the right movable clamp 16 and the second rack 17 are arranged on the fixed support 11, similarly, the right movable clamp 16 is in an L-shaped structure, one end of the right movable clamp is fixedly provided with the right clamping block 15, the other end of the right movable clamp is fixedly connected with the second rack 17, the right movable clamp 16 and the second rack 17 are movably sleeved on the fixed support 11 and are opposite to the left movable clamp 13 and the first rack 14, namely the right movable clamp 16, the right clamping block 15 and the second rack 17 can slide on the fixed support 11 together, so that the right clamping block 15 and the left clamping block 12 are close to each other, and two sides of the head of a patient are clamped.

A first gear 18 and a second gear 19, the first gear 18 and the second gear 19 being in mesh with each other, the first gear 18 further being in mesh with the first rack 14, the second gear 19 further being in mesh with the second rack 17, wherein the first rack 14 and the second rack 17 are oriented in the same direction, i.e. the teeth of the first rack 14 and the second rack 17 are located on the same side of the fixed bracket 11. Preferably, the first gear 18 and the second gear 19 are both double-layer gears, the upper end of the first gear 18 is engaged with the first rack 14, the lower end is engaged with the upper end of the second gear 19, and the lower end of the second gear 19 is engaged with the second rack 17. The number of teeth of the two gears is the same, and the transmission ratio is 1:1, so that the two gears rotate to drive the corresponding clamping blocks to move for the same distance.

The gear fixing seat 110 is internally and fixedly provided with 2 gear fixing shafts 111, the number of the gear fixing shafts 111 is 2, and the first gear 18 and the second gear 19 are respectively and rotatably mounted on the corresponding gear fixing shafts 111 to realize the fixation in the radial direction. By this embodiment, when the rack moves, the gear is fixed radially, only circumferential rotation occurs and drives the other gear to rotate, and no radial displacement occurs.

The pressing assembly is arranged in the gear fixing seat 110 and comprises a pressing bolt 120, a pressing block 130 and a pressing spring 140; the pressing spring 140 is disposed on the pressing bolt 120, and the pressing bolt 120 and the pressing block 130 are connected by a thread, so that the pressing bolt 120 can press the pressing block 130 downward, and the pressing block 130 presses against the first rack 14. The effect of compressing tightly the subassembly lies in: after the distance between the headstock 10 is adjusted, the operator may tighten the pressing bolt 120 to make the pressing spring 140 abut against the pressing block 130, so that the pressing block 130 presses against the first rack 14, and thus the first rack 14 and the fixing bracket 11 cannot slide relatively, thereby fixing the distance between the headstock 10 and the headstock, and making it difficult to loosen easily.

The working principle and working process of the pitch adjustment of the head frame 10 will be described in detail below: first, the patient needs to extend the head into the fixed bracket 11 so that the left clamping block 12 and the right clamping block 15 are respectively located at both sides of the head. Because the left clamping block 12, the left movable clamp 13 and the first rack 14 can slide on the fixed bracket 11 together, the right clamping block 15, the right movable clamp 16 and the second rack 17 can slide on the fixed bracket 11 together, the operator can push a single clamping block (one of the left clamping block 12 and the right clamping block 15), and the left clamping block 12 is pushed as an example below: referring to fig. 5-6, the first rack 14 is forced to approach the head, the first rack 14 drives the first gear 18 to rotate, the first gear 18 drives the second gear 19 to rotate in the opposite direction, the second gear 19 drives the second rack 17 to move, and the first rack 14 and the second rack 17 are oriented in the same direction, so the second rack 17 moves in the opposite direction to the first rack 14. That is, the first rack 14 and the second rack 17 are close to each other in the direction of the head, and the distance between the left clamp block 12 and the right clamp block 15 is reduced to clamp the head. After the distance is adjusted, the operator screws the compression nut to tightly press the compression block 130 on the first rack 14, so that the head of the patient is not easy to loosen due to twisting.

Similarly, when the operator pushes the right clamping block 15, the second rack 17 is forced to approach toward the head, the second rack 17 drives the second gear 19 to rotate, the second gear 19 drives the first gear 18 to rotate in the opposite direction, the first gear 18 drives the first rack 14 to move, and the moving direction of the first rack 14 is opposite to the moving direction of the second rack 17 because the first rack 14 and the second rack 17 are oriented in the same direction. That is, the second rack 17 and the first rack 14 are moved closer together in the direction of the head, and the distance between the left clamp block 12 and the right clamp block 15 is reduced to clamp the head. Therefore, the operator can complete the distance adjustment by pushing only one of the clamping blocks (one of the left clamping block 12 and the right clamping block 15) on one side.

In the present invention, the first rack 14 and the second rack 17 are oriented in the same direction, and are located on the same side of the fixing bracket 11. Regarding the arrangement direction of the two racks, there can be at least two embodiments: referring to fig. 7 and 8, the direction of movement of the components is shown by the arrows.

In the first embodiment, referring to fig. 7, when the first rack 14 is pushed in the direction F, the first gear 18 rotates clockwise to drive the second gear 19 to rotate counterclockwise, so as to drive the second rack 17 to move in the direction opposite to the direction F, thereby achieving the left-right clamping. Similarly, it is easy to understand that when the second rack 17 is pushed in the opposite direction of F, the left and right clamping can be realized, and the description is omitted.

In the second embodiment, referring to fig. 8, when the first rack 14 is pushed in the direction F, the first gear 18 rotates counterclockwise, which drives the second gear 19 to rotate clockwise, so as to drive the second rack 17 to move in the direction opposite to the direction F, thereby achieving the left-right clamping. Similarly, it is easy to understand that when the second rack 17 is pushed in the opposite direction of F, the left and right clamping can be realized, and the description is omitted.

Preferably, the first gear 18 and the second gear 19 adopt double-layer gears, the gear ratio is the same, the transmission ratio is 1:1, the pushing distance of the clamping block on one side is equal to the moving distance of the clamping block on the other side, and an operator can conveniently master and regulate the distance.

Preferably, the fixed bracket 11 comprises a circular tube, which facilitates the sliding of the rack to be smoother; the fixing bracket 11 is of a U-shaped structure, and is suitable for a patient to extend the head into the fixing bracket 11.

Preferably, the gear fixing seat 110 includes a fixing seat upper shell 112 and a fixing seat lower shell 113, the fixing seat upper shell 112 is located at the upper portion of the fixing bracket 11, the fixing seat lower shell 113 is located at the lower portion of the fixing bracket 11, and the fixing seat upper shell 112 and the fixing seat lower shell 113 are fixedly connected through screws. This embodiment can facilitate the first gear 18 and the second gear 19 to be rotatably mounted on the gear fixing shaft 111, and then cover the fixing seat.

Preferably, the oral CT headstock 10 further comprises a fixing plate 160, and the fixing bracket 11 is fixedly connected to the fixing plate 160 by the stud bolt 150.

The utility model also discloses an oral cavity CT machine, hold in the palm 20 including foretell oral cavity CT headstock 10 and the lower jaw that is used for fixing a position patient's lower jaw, headstock 10 and lower jaw hold in the palm 20 and fix patient's head posture jointly.

Through the detailed explanation of the embodiment, it can be understood that the utility model can prevent the head of the person to be tested from easily shaking, ensure that the image imaged by the detector has no motion artifacts, and ensure that the machine obtains a correct three-dimensional model of the oral teeth in the three-dimensional reconstruction; additionally, the utility model discloses a structure is succinct, and convenient operation just can accomplish the elasticity to the head through one hand, and medical staff can adjust patient's head posture through one hand, and the other hand can carry out interval regulation, press from both sides tight fixedly to the headstock simultaneously, has greatly strengthened the convenience and the practicality of operation, has improved the efficiency fixed to patient's posture.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.

Claims (10)

1. An oral CT headstock, comprising:

fixing a bracket;

the left movable clamp is in an L-shaped structure, one end of the left movable clamp is fixedly provided with the left clamping block, and the other end of the left movable clamp is fixedly connected with a first rack;

the clamping device comprises a right clamping block, a right movable clamp and a second rack, wherein the right movable clamp is in an L-shaped structure, one end of the right movable clamp is fixedly provided with the right clamping block, and the other end of the right movable clamp is fixedly connected with the second rack;

a first gear and a second gear, the first gear and the second gear being intermeshed, the first gear further being intermeshed with the first rack, the second gear further being intermeshed with the second rack;

the first rack and the second rack are in the same direction;

the first gear and the second gear are respectively and rotatably arranged on the corresponding gear fixing shafts to realize the fixation in the radial direction.

2. The oral CT headstock of claim 1, wherein said first gear and said second gear are both double gears.

3. The oral CT headstock of claim 2, wherein said first gear and said second gear have the same number of teeth and a ratio of 1: 1.

4. The oral CT headstock of claim 1, wherein said holding bracket is a U-shaped structure.

5. The oral CT headstock of claim 4, wherein said holding bracket comprises a circular tube.

6. The oral CT headstock of claim 1, wherein said oral CT headstock further comprises a hold-down assembly; the pressing assembly is arranged in the gear fixing seat and comprises a pressing bolt, a pressing block and a pressing spring, the pressing spring is arranged on the pressing bolt, the pressing bolt is connected with the pressing block through threads to press the pressing block downwards, and the pressing block is pressed on the first rack.

7. The oral cavity CT headstock of claim 4, wherein the fixing bracket is provided at both ends thereof with a stud bolt respectively, the stud bolt is L type, and one end thereof is connected with the fixing bracket by a screw thread and is fixed by a nut.

8. The oral CT headstock of claim 7, further comprising a retaining plate, said retaining bracket being fixedly attached to said retaining plate by said stud.

9. The oral CT headstock of claim 1, wherein said gear holder comprises a holder upper shell and a holder lower shell; the fixing seat upper shell is located on the upper portion of the fixing support, the fixing seat lower shell is located on the lower portion of the fixing support, and the fixing seat upper shell is fixedly connected with the fixing seat lower shell through screws.

10. An oral CT machine, comprising the oral CT machine head frame of any one of claims 1-9.

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