阅读说明：本技术 根管荡洗器荡洗针的高自由度连接结构及荡洗方法 (High-freedom-degree connecting structure of swinging needle of root canal swinging washer and swinging washing method ) 是由 张倜然 郭丹 于 2020-08-16 设计创作，主要内容包括：本发明涉及一种根管荡洗器的荡洗针与高自由度连接结构及荡洗方法,属于根管治疗设备技术领域；振荡针包括针头,球头接头和连接杆；振荡针的连接杆通过球头接头与偏心轮的球形槽连接,保留一个自由度；外壳的顶部设置还软胶包覆头罩,振荡针还通过圆柱接头设置在软胶包覆头罩内,形成圆柱副,保留四个自由度；共计保留五个自由度。本发明的优点在于,轨迹自适应,针头受阻后不停机,受阻后的针头自适应地改变轨迹；球头接头与圆柱接头的高自由度确保针头针头的安全,振荡针通过两个连接约束,具备五个自由度,在软胶包覆头罩处形成高自由度连接结构；电机扭矩小,针头不会被卡死；针头不会折断,安全性高；针头螺纹结构便于涂抹抛洒药物。(The invention relates to a swinging needle and high-freedom connecting structure of a root canal swinging device and a swinging method, belonging to the technical field of root canal treatment equipment; the oscillating needle comprises a needle head, a ball joint and a connecting rod; the connecting rod of the oscillating needle is connected with the spherical groove of the eccentric wheel through a ball joint, and one degree of freedom is reserved; the top of the shell is provided with a soft rubber coating hood, and the oscillating needle is arranged in the soft rubber coating hood through a cylindrical joint to form a cylindrical pair and keep four degrees of freedom; in total five degrees of freedom remain. The invention has the advantages that the track is self-adaptive, the machine does not stop after the needle head is blocked, and the blocked needle head changes the track in a self-adaptive way; the high degree of freedom of the ball joint and the cylindrical joint ensures the safety of the needle head, the oscillation needle is constrained through two connections and has five degrees of freedom, and a high-degree-of-freedom connection structure is formed at the position of the soft rubber-coated hood; the torque of the motor is small, and the needle head cannot be blocked; the needle head cannot be broken, and the safety is high; the thread structure of the needle head is convenient for smearing and throwing the medicine.)

1. The high-freedom-degree connecting structure of the oscillation needle of the root canal oscillation washer comprises an oscillation needle (2) and a battery cover (13) which are respectively arranged at the top and the bottom of a shell (1), and a battery bin (11) arranged in the shell (1), wherein the battery cover (2) is screwed at the bottom of the shell (1); a main control PCB (3), a motor (4) and a key (12) are further arranged in the shell (1), the front end of the motor (4) is further connected with an eccentric wheel (5) through a motor input shaft (41), and the positive pole and the negative pole of the main control PCB (3), the motor (4) and the key (12) are respectively connected with a positive pole blocking piece and a negative pole blocking piece of the battery compartment (11) through leads; the method is characterized in that:

the oscillating needle (2) comprises a needle head (23), a ball joint (21) and a connecting rod (22); a connecting rod (22) of the oscillating needle (2) is connected with a spherical groove (51) of the eccentric wheel (5) through a ball joint (21) to form a spherical pair and keep a degree of freedom;

the top of the shell (1) is provided with a soft rubber coated hood (12), the oscillating needle (2) is arranged in the soft rubber coated hood (1) through a cylindrical joint (24) to form a cylindrical pair, and four degrees of freedom are reserved; five degrees of freedom are reserved in total;

the needle (23) is provided with a thread structure.

2. The high degree-of-freedom connecting structure of the root canal swinging washer needle according to claim 1, characterized in that:

the oscillating needle (2) is arranged in a ring groove (121) of the soft rubber coating hood (12) through a cylindrical joint (24), and a sealing ring (122) is further arranged between the cylindrical joint (24) and the ring groove (121).

3. The high degree-of-freedom connecting structure of the root canal swinging washer needle according to claim 1, characterized in that:

the oscillating needle (2) is made of soft rubber or hard rubber plastic materials.

4. The swinging method of the swinging needle of the root canal swinging washer is characterized by comprising the following steps:

step 1, preparing a root canal, so that a conical opening capable of being placed in a needle head is formed in teeth;

step 2, preparing a scheme for introducing into a root canal by using a flushing solution comprising NaOCL and EDTA;

step 3, medicine application, namely immersing the thread of the needle head (23) into the medicine to adsorb the medicine, placing the needle head (23) stained with the medicine into the root canal,

step 4, treatment, namely starting the main machine through the key (12), enabling the needle head (23) to run according to an approximately elliptical track, and uniformly smearing the medicine in the threads of the needle head (23) on the wall of the root canal to achieve the aim of disinfection;

step 5, self-adaptation is carried out, when the oscillating needle (2) meets the frictional resistance in the root canal, the soft rubber coating hood (12) deforms at the annular groove (121) along with the stress of the needle head (23), self-adaptation is formed, and the machine cannot be locked and stopped;

and 6, ending treatment, namely adjusting a key (12) of the oscillation washer according to the sensitivity of the patient so as to adjust a vibration gear, and ending treatment after a required treatment effect is achieved.

Technical Field

The invention relates to a swinging needle and high-freedom degree connecting structure of a root canal swinging device and a swinging method, belonging to the technical field of root canal treatment equipment.

Background

The oscillator of root canal therapy in the existing market is an ultrasonic oscillator, and specifically comprises the following defects:

1. the needle head of the ultrasonic oscillator is of a metal structure, and the machine is stopped after the needle head is blocked;

2. the connecting structure of the needle head of the ultrasonic oscillator is fixed by a pin shaft, so that the restriction is more, the degree of freedom is low, and the X, Y direction of the working plane of the needle head has no degree of freedom; stopping the machine after the inner wall of the root canal is blocked;

3. the needle head of the ultrasonic oscillator is of a metal structure, the needle head is easy to break when being impacted on the inner wall of the root canal, even if an operator is skilled, the needle head is also impacted due to the movement of the head of a patient, so that the needle is broken, and the head is deviated due to cough of the patient; and the broken needle is extremely difficult to take out, which brings great inconvenience to patients and doctors, even influences the treatment of patients, causes physical and psychological damage and has high danger.

4. The ultrasonic wave oscillation washing has no medicine spreading and smearing function, the medicine spreading problem cannot be solved, and the long treatment time and the complicated treatment procedure are caused by replacing a needle head or applying the medicine through other ways.

Disclosure of Invention

The invention aims to provide a swinging needle and high-freedom connecting structure of a root canal swinging device and a swinging method, thereby overcoming the defects of the prior art.

The invention is realized by the following technical scheme that the vibration testing device comprises an oscillation needle and a battery cover, wherein the oscillation needle and the battery cover are respectively arranged at the top and the bottom of a shell, and a battery bin is arranged in the shell; the shell is also internally provided with a main control PCB, a motor and a key, the front end of the motor is also connected with an eccentric wheel through a motor input shaft, and the positive and negative electrodes of the main control PCB, the motor and the key are respectively connected with a battery compartment positive pole separation blade and a battery compartment negative pole separation blade through leads;

the oscillating needle comprises a needle head, a ball joint and a connecting rod; the connecting rod of the oscillating needle is connected with the spherical groove of the eccentric wheel through a ball joint to form a spherical pair, and one degree of freedom is reserved;

the top of the shell is provided with a soft rubber coating hood, and the oscillating needle is arranged in the soft rubber coating hood through a cylindrical joint to form a cylindrical pair and keep four degrees of freedom; in total five degrees of freedom remain.

The needle head is provided with a thread structure.

The oscillating needle is arranged in the annular groove of the soft rubber coating head cover through a cylindrical joint, and a sealing ring is arranged between the cylindrical joint and the annular groove;

the oscillation needle is made of soft rubber or hard rubber plastic material. Such as POM, TPE, TPU, PA and the like.

The washing method comprises the following steps:

step 1, preparing a root canal, so that a conical opening capable of being placed in a needle head is formed in teeth;

step 2, preparing a scheme for introducing into a root canal by using a flushing solution comprising NaOCL and EDTA;

step 3, medicine is applied, the thread of the needle head is immersed into the medicine to adsorb the medicine, the needle head stained with the medicine is placed into the root canal, and the needle head is a four-head thread;

step 4, treatment, namely starting the main machine through a key, enabling the needle head to run according to an approximately elliptical track, and uniformly smearing the medicine in the threads of the needle head on the wall of the root canal to achieve the purpose of disinfection;

step 5, self-adaptation is carried out, when the oscillating needle meets the frictional resistance in the root canal, the soft rubber coating hood deforms at the annular groove along with the stress of the needle head, self-adaptation is formed, and the machine cannot be locked and stopped;

and 6, ending treatment, namely adjusting a key of the oscillation washer according to the sensitivity of the patient so as to adjust the vibration gear, and ending treatment after the required treatment effect is achieved.

The invention has the advantages that 1, the track is self-adaptive, the machine does not stop after the needle head is blocked, and the track of the blocked needle head is self-adaptively changed; 2. the high degree of freedom of the ball joint and the cylindrical joint ensures the safety of the needle head, the oscillation needle is constrained through two connections and has five degrees of freedom, and a high-degree-of-freedom connection structure is formed at the position of the soft rubber-coated hood; 3. the torque of the motor is small, and the needle head cannot be blocked; 4. the needle head cannot be broken, and the safety is high; 5. the thread structure of the needle head is convenient for smearing and throwing the medicine.

Drawings

FIG. 1 is a block diagram of the present invention.

Fig. 2 is a cross-sectional view of the present invention.

Fig. 3 is a structural view of the oscillation needle.

Fig. 4 is a diagram of degrees of freedom.

FIG. 5 is a diagram showing the structure of the second embodiment.

FIG. 6 is a sectional view of the second embodiment.

FIG. 7 is a structural view of a vibrating needle according to a second embodiment.

Fig. 8 is a schematic diagram of the oscillation needle trajectory.

Detailed Description

The preferred embodiment of the present invention is further described with reference to fig. 1 to 8, which includes an oscillation needle 2 and a battery cover 13 respectively disposed at the top and the bottom of the housing 1, and a battery compartment 11 disposed in the housing 1, wherein the battery cover 2 is screwed to the bottom of the housing 1; the shell 1 is also internally provided with a main control PCB 3, a motor 4 and a key 12, the front end of the motor 4 is also connected with an eccentric wheel 5 through a motor input shaft 41, and the positive and negative electrodes of the main control PCB 3, the motor 4 and the key 12 are respectively connected with a positive baffle of a battery compartment 11 and a negative baffle of the battery compartment through leads; the oscillating needle 2 comprises a needle head 23, a ball joint 21 and a connecting rod 22; the connecting rod 22 of the oscillating needle 2 is connected with the spherical groove 51 of the eccentric wheel 5 through the ball joint 21 to form a spherical pair, and one degree of freedom is reserved;

the top of the shell 1 is provided with a soft rubber coated hood 12, and the oscillation needle 2 is arranged in the soft rubber coated hood 1 through a cylindrical joint 24 to form a cylindrical pair and keep four degrees of freedom; in total five degrees of freedom remain.

Specifically, the needle head 24 of the oscillation needle 2 is only X, the moving freedom degree in the Y direction is limited, other four freedom degrees realize flexible connection through the soft rubber coating hood 12, and meanwhile, the oscillation needle is not easy to move in the length direction due to the fact that the oscillation needle is fixedly connected with a flexible structure.

The specific principle is shown in fig. 4: the motor input shaft 41 is connected with the eccentric wheel 5, the connecting rod 22 is connected with the spherical pair of the eccentric wheel 5, and the movement of the degrees of freedom in the XY two directions is limited only; the other end of the connecting rod 22 is connected to a sealing ring 122 made of a flexible material, and the hardness of the material is about 30 degrees to 60 degrees shore. In this way, in the case of the motor 4 being stopped, the needle 24 will stay in a position of equilibrium with the forces exerted by the flexible material, and once the motor 4 is started, the motor 4 will drive the spherical pair of the connecting rod 22 to rotate via the eccentric 5.

By mechanical principle analysis, if the sealing ring 122 is not provided, the degree of freedom of the whole mechanism is as follows:

F=6n-5p5-4p4-3p3-2p2-p1；

f is the mechanism degree of freedom. n is the number of active members, P5 is only 1 degree of freedom, P4 has 2 degrees of freedom, P3 has 3 degrees of freedom, P2 has 4 degrees of freedom, and P1 has 5 degrees of freedom;

in the invention: f =6n-5P5-2P2=6x2-5x1-2x1= 5;

f is the mechanism degree of freedom. n is the number of moving members, n =2, i.e. spherical and cylindrical pairs. In the invention, only P5 and P2 are available; thus having 5 constrained members.

From the calculation results, if the flexible material is not fixed, the whole mechanism still has 5 degrees of freedom, and after the flexible material is added for fixing, if the sealing ring 122 is regarded as a rigid material, the whole mechanism is blocked, or the motor 4 overcomes the deformation of the material of the connecting rod 22 to run, the terminal has no movement output, and after the sealing ring 122 is changed into the flexible material, the whole mechanism can easily overcome the flexible material and generate plastic deformation, and meanwhile, the whole mechanism basically has no friction, and no extra noise is generated.

As shown in fig. 4, the rigidity of the connecting rod 22 is greater than the sealing ring 122 made of flexible material, but the motor 4 can also be flexibly deformed by neglecting the rigidity of the connecting rod 22; therefore, when the working end of the connecting rod 22 is completely blocked, the motor 4 can overcome the deformation of the connecting rod 22 and still continue to operate, and excessive working energy can not be transmitted to the needle tip, so that the working stress limit of the needle tip is ensured, the safety of the motor 4 is also protected, and the service life is prolonged.

From the above analysis, no matter what limit condition happens at the workload end, double insurance has been added to the design of the whole structure, so that the needle point can not be broken, the condition that the workload exceeds the standard can not occur, and the safety of the whole equipment is ensured.

The needle 23 has a threaded configuration.

The oscillating needle 2 is arranged in a ring groove 121 of the soft rubber covered hood 12 through a cylindrical joint 24, and a sealing ring 122 is also arranged between the cylindrical joint 24 and the ring groove 121;

the oscillation needle 2 is made of soft rubber or hard rubber plastic materials. Such as POM, TPE, TPU, PA and the like.