Intelligent fixed force orthodontic frame

Abstract

The present invention relates to a medical device, namely an intelligent fixed-force orthodontic frame, comprising a longitudinal support frame (3), a crossbeam (4) to which a pull wire can be connected is provided in the middle of the support frame, and the feature is that a voltage regulator (6) for automatically adjusting the tension of the pull wire (14) is provided on the support frame (3). The beneficial effect is that the tension of the pull wire is automatically adjusted by the intelligent control device, so that the tension of the orthodontic frame is more accurate and the orthodontic effect is better. The orthodontic frame has the characteristics of simple structure, low cost, and easy use, and is expected to become an essential product for maxillofacial plastic surgery.

Description

Technical Field

[0001] The invention relates to a medical device, namely an intelligent fixed-force orthodontic frame used for maxillofacial plastic surgery. Background Art

[0002] The orthodontic frame is a medical device suitable for maxillofacial plastic surgery. The main structure is a support frame composed of hard rods, and the crossbeam in the middle of the support frame is connected to the pull wire. When in use, the support frame is placed on the face of the person, and the other end of the pull wire is hung on the teeth of the person, so that the maxillofacial defects such as underbite, mandibular protrusion and tooth dislocation of minors can be corrected by local traction. Obviously, the function of the orthodontic frame is achieved by the tension of the pull wire, and the magnitude and stability of the tension are very important. However, the current orthodontic frame does not have a tension quantitative component, and the tension of the pull wire can only be adjusted by human feeling, which is neither accurate nor stable, and seriously affects the treatment effect. For this reason, I have developed a fixed force orthodontic frame, which can determine the tension by the length of the pull wire extension. This orthodontic frame has a simple structure and low cost, and is well received by patients. However, since the tension adjustment can only be carried out after the orthodontic frame is installed on the face of the person, at this time, it is difficult for the patient to see the length value clearly, and it needs the assistance of others to use it. In addition, due to the long wearing time, the adjusted pull wire will also relax, and it needs to be adjusted repeatedly, which is cumbersome. Especially during sleep, it is difficult for people to perceive and adjust the strength of the pulling wire, which often results in long-term virtual pulling and negatively affects the correction effect. Summary of the invention

[0003] The purpose of the present invention is to provide an intelligent fixed-force orthodontic frame which can automatically adjust the tension of the pull wire, accurately and stably maintain the orthodontic force, and has a better orthodontic effect.

[0004] The above purpose is achieved by the following technical solution: developing an intelligent fixed-force orthodontic frame, including a support frame, a crossbeam to which a pull wire can be connected is provided in the middle of the support frame, and the characteristic is that a voltage regulator for automatically adjusting the pull wire tension is provided on the support frame.

[0005] The pressure regulator comprises a tubular cylinder, which is rotatably connected to the crossbeam via a sleeve at the bottom, a piston is installed inside the cylinder, the front end of the piston rod in front of the piston extends out of the cylinder and is provided with a hook to which a pull wire can be connected, the air inlet of the cylinder is located at the front of the cylinder, the air inlet is connected to the air outlet of the air pump via an air pipe, and a constant pressure switch is provided between the air pipe and the air outlet of the air pump, which can control the start or stop of the air pump under a set pressure.

[0006] A swing shaft is arranged between the cylinder and the sleeve, and the axis of the swing shaft is perpendicular to the axis of the sleeve.

[0007] The constant pressure switch has a U-shaped tube connected to the outer end of the air delivery port of the air pump, one branch of the U-shaped tube is a connecting tube, and the other branch is a constant pressure tube, the connecting tube is connected to the air pipe, a sliding plug is arranged in the constant pressure tube, and the sliding plug and the tube wall of the constant pressure tube are precisely slidably matched to prevent air leakage, the sliding plug is connected to a push rod outward, and a constant pressure spring is sleeved on the outer periphery of the push rod, one end of the constant pressure spring is supported on the side of the sliding plug, and the other end is supported on the end wall of the constant pressure tube, the outer end of the push rod extends out of the constant pressure tube and is connected to the constant pressure switch of the air pump.

[0008] The constant pressure switch is a knife switch including a moving blade and a fixed blade. The lower end of the moving blade is hinged on the slide plate through a rotating shaft, the upper end of the moving blade is hinged to the outer end of the push rod, the fixed blade is installed on the slide plate through a column, the slide plate is installed in the slide groove on the platform, and the slide groove is provided with a positioning bolt for fixing the slide plate.

[0009] The lower end of the positioning bolt is fixed on the platform and slidingly matched with the long opening of the slide plate. The slide plate can be adjusted along the long opening and is pressed and fixed by the nut of the positioning bolt.

[0010] The air delivery port of the air pump is equipped with a check valve.

[0011] The front part of the air pipe is provided with a plurality of joints which can be connected with the air inlet of the cylinder.

[0012] The air inlet of the cylinder is equipped with a check valve.

[0013] The voltage regulator comprises a tubular cylinder, the bottom of the cylinder is rotatably connected to the crossbeam through a sleeve, a piston is arranged inside the cylinder, a piston rod of the piston is arranged on the rear side of the piston and extends out from the air hole at the rear end of the cylinder, and a hook which can be connected to a pull wire is arranged at the extended end of the piston rod.

[0014] The beneficial effects of the present invention are: the tension of the pull wire is automatically adjusted through the intelligent control device, so that the tension of the orthodontic frame is more accurate and the orthodontic effect is better. It has the characteristics of simple structure, low cost, and easy use, and is expected to become an essential product for maxillofacial plastic surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a front view of a first embodiment;

[0016] Figure 2 It is a left side view of the first embodiment;

[0017] Figure 3 It is a structural diagram of the components of the first embodiment, the voltage regulator and the constant pressure switch;

[0018] Figure 4 is an enlarged front view of the components of the constant pressure switch and the air pump of the first embodiment;

[0019] Figure 5is an enlarged front view of the component platform of the first embodiment;

[0020] Figure 6 is an enlarged top view of the component platform of the first embodiment;

[0021] Figure 7 is an enlarged front view of a U-shaped tube of a constant pressure switch component of the first embodiment;

[0022] Figure 8 is a schematic diagram of the use of the first embodiment;

[0023] Fig. 9 is a structural diagram of a component air pipe of the second embodiment;

[0024] Fig.10 is a partial enlarged front view of a cylinder component of the third embodiment;

[0025] Fig.11 is an enlarged front view of a cylinder component of the third embodiment;

[0026] Fig.12 is a schematic diagram of the use state of the third embodiment;

[0027] Fig.13 It is a front view of the cylinder component of the fourth embodiment.

[0028] As can be seen in the figure: orthodontic frame 1, upper pressure plate 2, support frame 3, crossbeam 4, lower support plate 5, voltage regulator 6, sleeve 7, swing shaft 8, cylinder 9, piston 10, piston rod 11, air inlet 12, hook 13, pull wire 14, air pipe 15, constant pressure switch 16, air pump 17, air outlet 18, connecting pipe 19, constant pressure pipe 20, slide plug 21, constant pressure spring 22, push rod 23, knife gate 24, platform 25, slide plate 26, positioning bolt 27, slide groove 28, moving blade 29, fixed blade 30, long mouth 31, scale line 32, check valve 33, joint 34, air hole 35, pull rope 36. DETAILED DESCRIPTION

[0029] First embodiment: Figure 1 , Figure 2 An example of an intelligent fixed force orthodontic frame is given. The orthodontic frame 1 includes a support frame 3. The upper part of the support frame 3 has an upper pressure plate 2 that matches the forehead of a person, the lower part is provided with a lower support plate 5 that can match the chin of a person, and the middle part is provided with a crossbeam 4 that can connect the wire. Its characteristics are: a voltage regulator 6 that automatically adjusts the wire tension is provided on the support frame 3. Research shows that there can be many types of voltage regulators 6. This example only cites the following one:

[0030] like Figure 3As shown, the pressure regulator 6 has a tubular cylinder 9, the bottom of the cylinder 9 is rotatably connected to the crossbeam 4 through a sleeve 7, a piston 10 is installed in the cylinder 9, a piston rod 11 is installed on one side of the piston, and a hook 13 that can be connected to a pull wire 14 is provided at the extended end of the piston rod 11. In this example, the piston rod 11 is in front of the piston 10, and the front end of the piston rod 11 extends out of the cylinder through a sealing hole on the front end wall of the cylinder, and a hook 13 that can be connected to the pull wire 14 is provided.

[0031] The front part of the cylinder is provided with an air inlet 12, which is connected to the air delivery port 18 of the air pump 17 through an air pipe 15. A constant pressure switch 16 is provided between the air pipe and the air delivery port 18 of the air pump, which can automatically control the start and stop of the air pump under a set pressure.

[0032] The cylinder 9 is rotatably connected to the crossbeam 4 through the sleeve 7, and its function is that the cylinder can swing around the crossbeam. Generally, this swing can meet the needs of work. On this basis, a swing shaft 8 can be installed between the cylinder and the sleeve, and the axis of the swing shaft is perpendicular to the axis of the sleeve and the axis of the cylinder. In this way, the cylinder can swing around the crossbeam and the swing shaft 8, and the direction of the axis can be adjusted arbitrarily according to needs.

[0033] There are many forms of constant pressure switches. Figure 4 The example is a U-shaped tube connected to the outer end of the air delivery port of the air pump. The U-shaped tube is a tube with two forks, which can also be approximately V-shaped, and is also a three-way tube. As can be seen in the figure, one of the two outlet pipes of the U-shaped tube is a connecting tube 19, and the other is a constant pressure tube 20. The connecting tube 19 is used to connect the air pipe 15, and the constant pressure tube 20 is provided with a sliding plug 21. The sliding plug 21 and the tube wall of the constant pressure tube 20 are precisely slidably matched to prevent air leakage. The sliding plug 21 is connected to the outside of the push rod 23, and a constant pressure spring 22 is sleeved on the outer periphery of the push rod 23. One end of the constant pressure spring is supported on the side of the sliding plug, and the other end is supported on the end wall of the constant pressure tube. The outer end of the push rod 23 extends out of the constant pressure tube 20 through the opening at the end of the tube, and is connected to the constant pressure switch 16 of the air pump 17. Obviously, the constant pressure spring 22 here is a functional component with high mechanical precision, that is, the displacement generated under the pressure of the sliding plug follows Hooke's law to generate a certain reaction force. Generally speaking, the commonly used pulling force of orthodontic frame wires is between 300 and 500g. This pressure is approximately equal to the pressure on the front side of the cylinder piston. Since the pressure in the system tends to be constant during operation, after the wire pulling force is determined, its displacement can be calculated based on the performance parameters of the constant pressure spring, and the displacement caused by the sliding plug compressing the constant pressure spring can be determined.

[0034] There are many forms of the constant pressure switch 16. The one exemplified in this example is the simplest knife switch 24. The knife switch is a switch that controls the start and stop of the air pump, and includes a moving blade 29 and a fixed blade 30. The upper end of the moving blade 29 is hinged to the outer end of the push rod 23, and the movement of the push rod can drive the moving blade to open or close the switch. Since the movement of the push rod is determined by the change in the length of the constant pressure spring, and the change in the length of the constant pressure spring is determined by the tension value of the pull wire, the extension and retraction distance of the push rod will change with the change in the tension value. Similarly, the position of the knife switch will also change. Therefore, the position of the knife switch should be adjustable. In order to achieve this purpose, the knife switch is set on a slide that can slide along the slide groove. Combined with Figure 5 , Figure 6 It can be seen that the lower end of the moving blade 29 is hinged on the slide plate 26 through a rotating shaft, and the fixed blade 30 is installed on the slide plate 26 through a column. The slide plate 26 is installed in the slide groove 28 on the platform 25. The slide plate can slide in the slide groove. The slide plate is provided with a long opening 31. In order to stabilize the slide plate in the set position, a positioning bolt 27 is provided in the slide groove 28. The lower end of the positioning bolt 27 is fixed on the platform and slidably cooperates with the long opening 31 of the slide plate 26. After the slide plate is adjusted in the direction of the long opening, it can be tightened and fixed by the nut of the positioning bolt. In order to accurately fix the position of the slide plate 26, a scale line 32 is provided on the platform.

[0035] In order to reduce the workload of the air pump, Figure 7 As shown, a check valve 33 is installed at the gas delivery port 18 of the air pump. The check valve is also called a one-way valve, and its function is to prevent the output air flow from returning. In this way, the air pump can be automatically closed when the air pressure reaches the set index, without having to keep the air pump open to prevent the air flow from returning. Of course, for air pumps with higher precision, they are one-way in themselves, which is equivalent to installing a check valve, and there is no need to install a check valve separately.

[0036] When working, Figure 8As shown, this orthodontic frame is assembled in front of a person, the upper pressing plate 2 is pressed on the forehead, the lower supporting plate 5 is clamped on the lower jaw, and then tied with a drawstring, one end of the pull wire is hung on the position where the person's teeth need to be pulled out, and the other end is hung on the hook of the voltage regulator. The piston is pulled to the front of the cylinder, and the pull wire is appropriately relaxed, and the tension of the pull wire is as low as possible below zero. When the air pump is turned on, the air flow can be output through the air pump air delivery port, enter the cylinder through the trachea, and push the piston backward. At the same time, the air flow enters the constant pressure pipe, pushes the sliding plug to compress the constant pressure spring to move backward, and when it moves to the set position, the outer end of the push rod just pushes the moving blade of the knife gate, the power supply stops, and the air pump is turned off. When the pressure in the cylinder decreases, the pressure of the constant pressure spring decreases and stretches, pushing the sliding plug and the push rod forward, pulling the moving blade to swing and engage with the fixed blade, the circuit is connected, the air pump is turned on, and air is added to the cylinder to maintain the pressure required for orthodontics. In this way, the tension of the pull wire can be automatically maintained without human operation, thereby obtaining a good orthodontic effect. Since the device can be very small, similar to the size of a portable electronic sphygmomanometer, it can be placed near the patient and can also be carried on the body using a battery, which is very convenient to use.

[0037] The second embodiment: Fig. 9 As shown, the front part of the trachea 15 has a plurality of joints 34 that can be connected to the air inlet of the cylinder. Generally speaking, two pull wires are often used simultaneously during orthodontic treatment. With this trachea with multiple joints, only one trachea is needed, thereby making the structure of the orthodontic frame simpler.

[0038] The third embodiment: Fig.10 As shown, the air inlet 12 of the cylinder 9 is equipped with a check valve 33. The check valve is installed here to prevent the air flow from returning and better maintain the air pressure in the system. In addition, the air pipe can be pulled out after inflation, and the user can Fig.12 As shown in the figure, it is more convenient to move freely with this orthodontic frame. Of course, it cannot be automatically inflated at this time, and the user needs to inflate it regularly according to the situation. Fig.11 As shown, a drawstring 36 is added to the rear side of the piston, and the drawstring is pulled out from the air hole 35 at the rear end of the cylinder 9. When free, the drawstring can be pulled by hand to adjust the position of the piston and increase the pulling force of the drawstring.

[0039] Fourth embodiment: Fig.13Another voltage regulator 6 is introduced. This voltage regulator has the same working principle as the voltage regulator of the above embodiment. It also has a tubular cylinder 9. The bottom of the cylinder 9 is rotatably connected to the crossbeam 4 through a sleeve 7. A piston 10 is installed in the cylinder. The difference is that the piston rod 11 of the piston is installed on the rear side of the piston and extends from the air hole 35 at the rear end of the cylinder. The extended end of the sliding plug rod is provided with a hook 13 that can be connected to the pull wire. Compared with the first embodiment, the position of the piston rod 11 is changed from the front of the piston 10 to the back, and the hole at the front end of the cylinder for the piston rod to extend is cancelled. It is well known in the industry that the sealing processing difficulty of the piston rod and the cylinder end hole in this place is relatively large. The piston rod extends backward from the air hole at the rear end of the cylinder, and the front seal is not needed. The air hole at the rear not only does not need to be sealed, but also needs to leave a gap for venting. The overall manufacturing difficulty and cost are greatly reduced. After this seal is cancelled, only the seal between the piston and the cylinder wall remains, which is relatively easy. For example, the piston is made of high elastic material and has a slight interference fit with the tube wall. In addition, after the piston rod is extended backward, the extended end is hung with a pull wire, the installation space of the pull wire is larger, the range of tension adjustment is also increased, and the optimization effect is more obvious.

[0040] It should be noted that the working medium air used in the above embodiments is equivalent to various fluids such as water and oil. The air pump and cylinder used and the oil pump and cylinder of the hydraulic device are all equivalent and interchangeable components. The technical solutions involved are also equivalent technical solutions, so the scope of rights claimed is also equivalent.

Claims

1. An intelligent fixed-force orthodontic frame, comprising a support frame (3), wherein a crossbeam (4) is provided in the middle of the support frame to which a pull wire (14) can be connected, and wherein: The support frame (3) is provided with a voltage regulator (6) for automatically adjusting the tension of the pull wire (14); The pressure regulator (6) comprises a tubular cylinder (9), the bottom of which is rotatably connected to the crossbeam (4) via a sleeve (7), a piston (10) is arranged inside the cylinder, a front end of a piston rod (11) in front of the piston protrudes out of the cylinder and is provided with a hook (13) that can be connected to a pull wire (14), an air inlet (12) is arranged at the front of the cylinder, the air inlet is connected to an air delivery port (18) of an air pump (17) via an air pipe (15), and a constant pressure switch (16) that can control the start and stop of the air pump under a set pressure is arranged between the air pipe and the air delivery port (18) of the air pump; A swing shaft (8) is provided between the cylinder (9) and the sleeve (7), and the axis of the swing shaft is perpendicular to the axis of the sleeve; The constant pressure switch (16) has a U-shaped tube connected to the outer end of the air delivery port (18) of the air pump, one branch of the U-shaped tube is a connecting tube (19), and the other branch is a constant pressure tube (20), the connecting tube is connected to the air pipe (15), a sliding plug (21) is arranged inside the constant pressure tube, the sliding plug and the tube wall of the constant pressure tube are precisely slidably matched to prevent air leakage, the sliding plug is connected to the outside of a push rod (23), and a constant pressure spring (22) is sleeved on the outer periphery of the push rod, one end of the constant pressure spring is supported on the side of the sliding plug, and the other end is supported on the end wall of the constant pressure tube, the outer end of the push rod extends out of the constant pressure tube and is connected to the constant pressure switch of the air pump; The constant pressure switch (16) comprises a knife switch (24), the knife switch has a movable blade (29) and a fixed blade (30), the lower end of the movable blade is hinged on the slide plate (26) through a rotating shaft, the upper end of the movable blade is hinged to the outer end of the push rod (23), the fixed blade is mounted on the slide plate through a column, the slide plate is mounted in a slide groove (28) on the platform, and a positioning bolt (27) for fixing the slide plate is provided in the slide groove.

2. The intelligent fixed force orthodontic frame according to claim 1, characterized in that: The positioning bolt (27) is erected in the long opening (31) of the slide plate (26), and the lower end is fixed on the platform (25). The slide plate can be adjusted along the long opening and is fixed by the nut of the positioning bolt.

3. The intelligent fixed force orthodontic frame according to claim 1, characterized in that: The air delivery port (18) of the air pump (17) is equipped with a check valve.

4. The intelligent fixed force orthodontic frame according to claim 1, characterized in that: The front part of the air pipe (15) is provided with a plurality of joints (34) which can be connected to the air inlet (12) of the cylinder.

5. The intelligent fixed force orthodontic frame according to claim 1, characterized in that: The air inlet (12) of the cylinder (9) is provided with a check valve (33).

6. The intelligent fixed force orthodontic frame according to claim 1, characterized in that: The pressure regulator (6) comprises a tubular cylinder (9), the bottom of which is rotatably connected to the crossbeam (4) via a sleeve (7), a piston (10) being arranged inside the cylinder, a piston rod (11) of which is arranged at the rear side of the piston and extends out from an air hole (35) at the rear end of the cylinder, and a hook for connecting a pull wire is provided at the rear end of the piston rod.

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