Hot melting gutta-percha filling structure

Abstract

The utility model discloses a hot melting gutta-percha filling structure, and relates to the field of dental treatment instruments. Comprising a shell and a propelling assembly, a heating cavity is formed in the shell, the propelling assembly is arranged in the shell, one end of the propelling assembly is inserted into the heating cavity, and a stopping assembly is arranged between the propelling assembly and the shell; the propelling assembly comprises a motor, a transmission part and a push rod, the motor is fixed in the shell and drives the push rod to stretch out and draw back through the transmission part, one end of the push rod is connected with the transmission part, the other end of the push rod extends into the heating cavity, and the stopping assembly is arranged on the transmission part and arranged between the shell and the transmission part; the stopping assembly comprises a magnet and a Hall sensor, the Hall sensor is arranged on the shell, the magnet is fixed to the pushing sleeve, and the magnet gets close to or away from the Hall sensor when the pushing sleeve reciprocates. The motor has the advantage that the motor is not easy to damage.

Description

Technical Field

[0001] The utility model relates to a dental treatment device, in particular to a hot-melt gutta-percha filling structure. Background Art

[0002] Hot melt gutta-percha filling of root canal is an important part of the root canal treatment process. In the early stage of filling, after the root canal of the tooth is enlarged and cleaned, it is necessary to fill the root canal with gutta-percha. Only partially heated gutta-percha tip can be inserted into the root apex area, and then the tip of the heating tip of the gutta-percha cutter is used to cut and compact the gutta-percha tip, so that the root apex is filled with gutta-percha, and then the gutta-percha filling instrument is used to fill the root canal with gutta-percha to prevent the root canal from being infected again. The gutta-percha filling instrument can heat the gutta-percha into a molten state. When using the gutta-percha filling instrument, the gutta-percha is put into the gutta-percha entrance, and then the push rod pushes the gutta-percha forward, and then the gutta-percha is squeezed out from the injection needle and injected into the root canal of the tooth by the needle. This method is called hot melt gutta-percha filling method, which can adapt to the shape of the root canal of the tooth, including the side branches. When the gutta-percha is squeezed out, the piston rod is pulled back, the gutta-percha needle is removed, and the gutta-percha is added to the heating chamber of the host again. The gutta-percha needle is reinstalled and tightened, and it can be reused.

[0003] During use, the solid gutta-percha stick must be loaded first, and then the instrument generates heat to heat it to a molten state, and then the push rod squeezes the gutta-percha out and fills it into the root canal. There is usually a metal tube loaded with gutta-percha. Traditional gutta-percha filling instruments mostly use uninsulated resistance wire or resistance film with a large outer diameter of the wire, and electromagnetic induction to heat the metal tube. These heating methods have a large heating area, which makes the heating efficiency low. To reach the corresponding temperature, the power consumption is large but the temperature rise rate is slow. The push rod is driven by the motor. When the push rod reaches the upper limit of the travel, only the push rod stops moving, but the motor is actually in a powered-on and stalled state, which is very easy to damage the motor used to drive the push rod to rise and fall. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a hot-melt gutta-percha filling structure.

[0005] The utility model is implemented by the following technical solutions:

[0006] A hot melt gutta-percha filling structure comprises a shell and a propulsion assembly, wherein a heating cavity is provided in the shell, the propulsion assembly is arranged in the shell and one end of the propulsion assembly is inserted into the heating cavity, and a stop assembly is arranged between the propulsion assembly and the shell;

[0007] The propulsion assembly includes a motor, a transmission part and a push rod, wherein the motor is fixed in the housing, and the motor drives the push rod to extend and retract through the transmission part, one end of the push rod is connected to the transmission part, and the other end of the push rod extends into the heating chamber, and the stop assembly is arranged on the transmission part and placed between the housing and the transmission part;

[0008] The stop assembly includes a magnet and a Hall sensor, wherein the Hall sensor is disposed on the housing, and the magnet is fixed on the transmission part. When the transmission part reciprocates, the magnet approaches or moves away from the Hall sensor.

[0009] The transmission part includes a screw and a pushing sleeve, the screw is arranged in the outer shell, the push rod is arranged at the end of the pushing sleeve away from the screw, the motor drives the screw to rotate, a stop steel ball is arranged between the pushing sleeve and the screw, the rotation of the screw drives the push rod to reciprocate in the heating chamber, and the stop component is arranged between the pushing sleeve and the outer shell.

[0010] A heating resistor is wound on the outer wall of the heating chamber, and the heating resistor is wound on an end of the heating chamber away from the push rod.

[0011] A fixing ring is sleeved on the end of the pushing sleeve, and the push rod is inserted into the fixing ring and fixed to the end of the pushing sleeve through the fixing ring.

[0012] A thrust bearing is sleeved on the rotating shaft of the motor, and the end of the screw rod passes through the thrust bearing and is fixedly connected to the rotating shaft of the motor.

[0013] Compared with the prior art, the heating resistor of the utility model is concentrated in the front section of the heating chamber, and the enameled wire is wound in close contact with each other as the heating resistor, so that the heating part is compact in the front section, avoiding large-area heating, thereby achieving the effect of fast and efficient heating. The front section of the gutta-percha softens at high temperature, and the push rod can push the gutta-percha out to enable the doctor to use the gutta-percha to treat the patient. When there is gutta-percha in the heating chamber, screw on the gutta-percha needle and press the heating button. At this time, the heating will not be started, but the motor will be started. The motor drives the screw rod to rotate, and the thread principle is used to push the push sleeve and push the push rod forward. When it hits the gutta-percha, the gutta-percha is not softened and cannot be pushed out. It is subject to resistance, and the Hall is not aligned with the magnet, and the magnet cannot be read. Therefore, it is determined that there is gutta-percha inside and the gutta-percha needle has been screwed on, and the heating can be started. When there is no gutta-percha in the heating chamber, the heating will not start, but the motor will start to push the push rod forward. If there is no gutta-percha in the heating chamber, the motor will keep rotating, driving the lead screw to rotate, and using the principle of thread, the push sleeve is pushed forward, and the push rod is pushed until the push sleeve and the fixed sleeve fit together. At this time, resistance is received, and the Hall and the magnet are aligned, and it is read that the push rod has been pushed to the bottom, and it is determined that there is no gutta-percha in the heating chamber or the gutta-percha needle is not installed, so the gutta-percha is pushed out and falls. At this time, the heating will not start, and the motor will reverse to retract the push rod. This improves the safety of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] In the figure: 1. housing; 2. heating chamber; 3. motor; 4. push rod; 5. magnet; 6. Hall sensor; 7. screw rod; 8. push sleeve; 9. fixing ring; 10. thrust bearing; 11. heating resistor. DETAILED DESCRIPTION

[0016] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0017] like Figure 1 As shown, a hot melt gutta-percha filling structure comprises a shell and a propulsion assembly, a heating chamber is provided in the shell, the propulsion assembly is arranged in the shell and one end of the propulsion assembly is inserted into the heating chamber, and a stop assembly is arranged between the propulsion assembly and the shell. The propulsion assembly comprises a motor, a transmission part and a push rod, the motor is fixed in the shell, the motor drives the push rod to extend and retract through the transmission part, one end of the push rod is connected to the transmission part, and the other end of the push rod extends into the heating chamber, and the stop assembly is arranged on the transmission part and placed between the shell and the transmission part. The stop assembly comprises a magnet and a Hall sensor, the Hall sensor is arranged on the shell, the magnet is fixed on the push sleeve, and the magnet approaches or moves away from the Hall sensor when the push sleeve moves back and forth. Using the principle of thread, the push sleeve is pushed forward, and the push rod is pushed forward. When it hits the gutta-percha, the gutta-percha is not softened and cannot be pushed out, and is subject to resistance, and the Hall is not aligned with the magnet, and the magnet cannot be read, so it is determined that there is gutta-percha inside, and the gutta-percha needle has been screwed on, and heating can be started. When there is no gutta-percha in the heating chamber, the heating will not start, but the motor will start to push the push rod forward. If there is no gutta-percha in the heating chamber, the motor will keep rotating, driving the lead screw to rotate, and using the principle of thread, the push sleeve is pushed forward, and the push rod is pushed until the push sleeve and the fixed sleeve fit together. At this time, resistance is received, and the Hall and the magnet are aligned, and it is read that the push rod has been pushed to the bottom, and it is determined that there is no gutta-percha in the heating chamber or the gutta-percha needle is not installed, so the gutta-percha is pushed out and falls. At this time, the heating will not start, and the motor will reverse to retract the push rod. This improves the safety of use.

[0018] The transmission part includes a screw and a push sleeve. The screw is arranged in the shell, and the push rod is arranged at the end of the push sleeve away from the screw. The motor drives the screw to rotate. A stop ball is arranged between the push sleeve and the screw. The screw rotates to drive the push rod to move back and forth in the heating chamber. The stop assembly is arranged between the push sleeve and the shell. Using the principle of thread, the push sleeve is pushed forward to push the push rod forward.

[0019] A heating resistor is wound on the outer wall of the heating chamber, and the heating resistor is wound on one end of the heating chamber away from the push rod. A fixing ring is sleeved on the end of the pushing sleeve, and the push rod is inserted into the fixing ring and fixed to the end of the pushing sleeve through the fixing ring. A thrust bearing is sleeved on the rotating shaft of the motor, and the end of the screw rod passes through the thrust bearing and is fixedly connected to the rotating shaft of the motor. The heating resistors are concentrated in the front section of the heating chamber, and the enameled wire is wound in close contact with each other as the heating resistor, so that the heating part is compact in the front section to avoid large-area heating, thereby achieving the effect of fast and efficient heating. The front section of the gutta-percha is softened by high temperature, and the push rod can push the gutta-percha out to enable the doctor to use the gutta-percha to treat the patient. When there is gutta-percha in the heating chamber, screw on the gutta-percha needle and press the heating button. At this time, the heating will not be started, but the motor will be started, and the motor will drive the screw rod to rotate.

[0020] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A hot melt gutta-percha filling structure, comprising a shell and a propulsion assembly, wherein a heating chamber is provided in the shell, characterized in that: The propulsion assembly is arranged in the shell and one end of the propulsion assembly is inserted into the heating chamber, and a stop assembly is arranged between the propulsion assembly and the shell; The propulsion assembly includes a motor, a transmission part and a push rod, wherein the motor is fixed in the housing, and the motor drives the push rod to extend and retract through the transmission part, one end of the push rod is connected to the transmission part, and the other end of the push rod extends into the heating chamber, and the stop assembly is arranged on the transmission part and placed between the housing and the transmission part; The stop assembly includes a magnet and a Hall sensor, wherein the Hall sensor is disposed on the housing, and the magnet is fixed on the transmission part. When the transmission part reciprocates, the magnet approaches or moves away from the Hall sensor.

2. A hot melt gutta-percha filling structure according to claim 1, characterized in that: The transmission part includes a screw and a pushing sleeve, the screw is arranged in the outer shell, the push rod is arranged at the end of the pushing sleeve away from the screw, the motor drives the screw to rotate, a stop steel ball is arranged between the pushing sleeve and the screw, the rotation of the screw drives the push rod to reciprocate in the heating chamber, and the stop component is arranged between the pushing sleeve and the outer shell.

3. A hot melt gutta-percha filling structure according to claim 1, characterized in that: A heating resistor is wound on the outer wall of the heating chamber, and the heating resistor is wound on an end of the heating chamber away from the push rod.

4. A hot melt gutta-percha filling structure according to claim 2, characterized in that: A fixing ring is sleeved on the end of the pushing sleeve, and the push rod is inserted into the fixing ring and fixed to the end of the pushing sleeve through the fixing ring.

5. A hot melt gutta-percha filling structure according to claim 2, characterized in that: A thrust bearing is sleeved on the rotating shaft of the motor, and the end of the screw rod passes through the thrust bearing and is fixedly connected to the rotating shaft of the motor.

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