Needle head structure of hot melting gutta-percha needle

Abstract

The utility model discloses a needle head structure of a hot melting gutta-percha needle, and relates to the field of dental treatment instruments, the needle head structure comprises a fixing nut and a sealing assembly which are used for being fixed on a machine body, the sealing assembly is arranged in the fixing nut, and the end part of the fixing nut is provided with a needle hole for an injection needle to penetrate through; a rotary knob is arranged at the end, away from the machine body, of the fixing nut, the rotary knob is rotationally connected to the fixing nut, a containing cavity is formed in the rotary knob, an adjusting nut is fixed in the containing cavity, the injection needle penetrates through the adjusting nut, and a limiting ring is arranged on the outer wall of the injection needle. The limiting ring is clamped in the adjusting nut, and the adjusting nut drives the limiting ring to rotate when rotating. The sealing device has the advantages of being good in sealing performance and convenient and fast to operate.

Description

Technical Field

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

[0002] Filling the root canal with hot melt gutta-percha is an important part of the root canal treatment process. In the early stage of filling, only a partially heated gutta-percha tip can be inserted into the root apex area, and then the tip of the heated 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. When using the gutta-percha filling instrument, the gutta-percha is put into the gutta-percha from the gutta-percha entrance, and then the push rod pushes the gutta-percha forward, and then the gutta-percha is squeezed out from the gutta-percha needle. 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 main unit again. The gutta-percha needle is reinstalled and tightened, and it can be reused. When the doctor fills the patient's tooth root canal with gutta-percha, the operation is particularly difficult due to the limitation of the working space. During the treatment process, the gutta-percha needle of the gutta-percha filling instrument must not only reach a specific position accurately, but also be easy to change the direction of the bent gutta-percha needle or rotate the gutta-percha needle to fill other positions of the tooth root canal. At present, since the gutta-percha filling instrument uses a fixed gutta-percha needle or a special tool to rotate the gutta-percha needle, the special tool must be sterilized, cleaned and maintained, and the operation is cumbersome. There are very great limitations during use, which greatly increases the doctor's workload and the cost of maintaining the special tool. Utility Model Content

[0003] In order to overcome the deficiencies of the prior art, the utility model provides a needle structure of a hot-melt gutta-percha needle.

[0004] The utility model is implemented by the following technical scheme: a needle structure of a hot melt gutta-percha needle, comprising a fixing nut and a sealing assembly for fixing on a body, wherein the sealing assembly is arranged in the fixing nut, and a needle hole for the injection needle to pass through is arranged at the end of the fixing nut;

[0005] A knob is provided at the end of the fixing nut facing away from the fuselage, and the knob is rotatably connected to the fixing nut. A accommodating cavity is defined in the knob, and an adjusting nut is fixed in the accommodating cavity. The injection needle passes through the adjusting nut, and a limiting ring is provided on the outer wall of the injection needle. The limiting ring is engaged in the adjusting nut and drives the limiting ring to rotate when the adjusting nut rotates.

[0006] The knob is provided with a clearance hole for the injection needle to pass through, and a blocking plug is provided on the inner wall of the clearance hole, and the blocking plug abuts against the end surface of the adjusting nut.

[0007] The injection needle comprises a needle head and a needle seat, a limit platform is provided on the outer wall of the needle seat, the sealing assembly abuts against the limit platform, one end of the needle seat is inserted into the adjusting nut, and the limit ring is fixed on the outer wall of the needle seat inserted into the adjusting nut;

[0008] The needle seat is provided with a through hole for the needle to pass through, and a fixing sleeve is provided at the end of the needle. When the needle is inserted into the through hole, the fixing sleeve is placed between the needle and the needle seat, and the outer wall of the fixing sleeve abuts against the inner wall of the through hole.

[0009] The sealing assembly includes a support pad and a sealing ring. The end of the fixing nut is provided with a mounting groove, the needle hole is opened at the bottom of the mounting groove, the support pad is arranged in the mounting groove and abuts against the bottom of the mounting groove, and the sealing ring is sleeved on the injection needle. When the injection needle is inserted into the needle hole, the sealing ring abuts against the support pad.

[0010] A heating chamber is provided in the body, and when the needle structure is mounted on the body, the heating chamber abuts against the sealing ring.

[0011] An enlarged cavity is provided at one end of the heating cavity abutting against the sealing ring. The enlarged cavity is matched with the outer edge of the needle seat, and the outer wall of the sealing ring abuts against the inner wall of the enlarged cavity.

[0012] The utility model allows the injection needle to pass through the needle seat. The fixed sleeve presses the injection needle to fix it in the needle seat. The sealing ring is sleeved on the outside of the needle seat and is sealed with the heating chamber of the machine body to prevent the gutta-percha from overflowing. The fixed nut device supports the pad, which is used to ensure that the fixed nut is subjected to a wide thrust from the needle seat during injection, thereby avoiding insufficient support force of the fixed nut. The adjusting nut fixes the needle seat. The shielding plug blocks the adjusting nut and protects the injection needle. The needle seat has a flat position, and rotating the knob can drive the injection needle to rotate. The appearance has a non-slip gripper, which can achieve the function of directly twisting it by hand and easily rotating the knob without tools, and drives the needle seat and the injection needle to rotate together, making the operation more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 It is a schematic diagram of the structure of the utility model in use;

[0015] In the figure: 1. fixing nut; 2. knob; 3. adjusting nut; 4. blocking plug; 5. needle; 6. needle seat; 7. limit platform; 8. support pad; 9. sealing ring; 10. fixing sleeve; 11. fuselage; 12. heating chamber; 13. enlargement head. 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 1-2 As shown, a needle structure of a hot melt gutta-percha needle comprises a fixing nut 1 and a sealing assembly for fixing on a body 11. The sealing assembly is arranged in the fixing nut 1, and a needle hole for the injection needle to pass through is arranged at the end of the fixing nut 1. A knob 2 is arranged at one end of the fixing nut 1 away from the body 11. The knob 2 is rotatably connected to the fixing nut 1. A receiving cavity is arranged in the knob 2. An adjusting nut 3 is fixed in the receiving cavity. The injection needle passes through the adjusting nut 3. A limiting ring is arranged on the outer wall of the injection needle. The limiting ring is engaged in the adjusting nut 3 and drives the limiting ring to rotate when the adjusting nut 3 rotates. The function of directly twisting the knob 2 by hand and easily rotating it without tools is achieved, and the needle seat 6 and the injection needle are driven to rotate together, making the operation more convenient.

[0018] The knob 2 is provided with a clearance hole for the injection needle to pass through, and a blocking plug 4 is provided on the inner wall of the clearance hole, and the blocking plug 4 abuts against the end face of the adjusting nut 3. The blocking plug 4 is used to fix the position of the adjusting nut 3 to prevent the adjusting nut 3 from rotating when the knob 2 is turned. The injection needle includes a needle 5 and a needle seat 6. A limiting platform 7 is provided on the outer wall of the needle seat 6, and a sealing ring 9 abuts against the limiting platform 7. One end of the needle seat 6 is inserted into the adjusting nut 3 and the limiting ring is fixed on the outer wall of the needle seat 6 inserted into the adjusting nut 3. A perforation is provided on the needle seat 6 for the needle 5 to pass through, and a fixing sleeve 10 is provided at the end of the needle 5. When the needle 5 is inserted into the perforation, the fixing sleeve 10 is placed between the needle 5 and the needle seat 6, and the outer wall of the fixing sleeve 10 abuts against the inner wall of the perforation. The fixing sleeve 10 assists in fixing the needle 5, so that the needle 5 is fixed more firmly.

[0019] The sealing assembly includes a support pad 8 and a sealing ring 9. A mounting groove is provided at the end of the fixing nut 1. The needle hole is opened at the bottom of the mounting groove. The support pad 8 is arranged in the mounting groove and abuts against the bottom of the mounting groove. The sealing ring 9 is sleeved on the injection needle. When the injection needle is inserted into the needle hole, the sealing ring 9 abuts against the support pad 8. A heating chamber 12 is provided in the fuselage. When the needle head 5 structure is installed on the fuselage, the heating chamber 12 abuts against the sealing ring 9. An enlarged cavity is provided at one end of the heating chamber 12 abutting against the sealing ring 9. The enlarged cavity is adapted to the outer edge of the needle seat 6, and the outer wall of the sealing ring 9 abuts against the inner wall of the enlarged cavity. The fixed sleeve 10 presses the injection needle to fix it inside the needle seat 6. The sealing ring 9 is sleeved on the outside of the needle seat 6 and is sealed with the heating chamber 12 of the fuselage to prevent the gutta-percha from overflowing and to provide better sealing.

[0020] In the utility model, the injection needle passes through the needle seat 6. The fixed sleeve 10 presses the injection needle to fix it in the needle seat 6. The sealing ring 9 is sleeved on the outside of the needle seat 6 and is sealed with the heating chamber 12 of the fuselage to prevent the gutta-percha from overflowing. The fixing nut 1 is provided with a support pad 8, which is used to ensure that the fixing nut 1 is subjected to a wide thrust of the needle seat 6 during injection, thereby avoiding insufficient support force of the fixing nut 1. The adjusting nut 3 fixes the needle seat 6. The shielding plug 4 blocks the adjusting nut 3 and protects the injection needle. The needle seat 6 has a flat position, and rotating the knob 2 can drive the injection needle to rotate. The appearance has a non-slip gripper, which can achieve the function of directly twisting it by hand and easily rotating the knob 2 without tools, and drives the needle seat 6 and the injection needle to rotate together, making the operation more convenient.

[0021] 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 needle structure of a hot melt gutta-percha needle, comprising a fixing nut and a sealing assembly for fixing on a body, characterized in that: The sealing assembly is arranged in the fixing nut, and the end of the fixing nut is provided with a needle hole for the injection needle to pass through; A knob is provided at the end of the fixing nut facing away from the fuselage, and the knob is rotatably connected to the fixing nut. A accommodating cavity is defined in the knob, and an adjusting nut is fixed in the accommodating cavity. The injection needle passes through the adjusting nut, and a limiting ring is provided on the outer wall of the injection needle. The limiting ring is engaged in the adjusting nut and drives the limiting ring to rotate when the adjusting nut rotates.

2. The needle structure of a hot melt gutta-percha needle according to claim 1, characterized in that: The knob is provided with a clearance hole for the injection needle to pass through, and a blocking plug is provided on the inner wall of the clearance hole, and the blocking plug abuts against the end surface of the adjusting nut.

3. The needle structure of a hot melt gutta-percha needle according to claim 2, characterized in that: The injection needle comprises a needle head and a needle seat, a limit platform is provided on the outer wall of the needle seat, the sealing assembly abuts against the limit platform, one end of the needle seat is inserted into the adjusting nut, and the limit ring is fixed on the outer wall of the needle seat inserted into the adjusting nut; The needle seat is provided with a through hole for the needle to pass through, and a fixing sleeve is provided at the end of the needle. When the needle is inserted into the through hole, the fixing sleeve is placed between the needle and the needle seat, and the outer wall of the fixing sleeve abuts against the inner wall of the through hole.

4. The needle structure of a hot melt gutta-percha needle according to claim 3, characterized in that: The sealing assembly includes a support pad and a sealing ring. The end of the fixing nut is provided with a mounting groove, the needle hole is opened at the bottom of the mounting groove, the support pad is arranged in the mounting groove and abuts against the bottom of the mounting groove, and the sealing ring is sleeved on the injection needle. When the injection needle is inserted into the needle hole, the sealing ring abuts against the support pad.

5. The needle structure of a hot melt gutta-percha needle according to claim 4, characterized in that: A heating chamber is provided in the body, and when the needle structure is mounted on the body, the heating chamber abuts against the sealing ring.

6. The needle structure of a hot melt gutta-percha needle according to claim 5, characterized in that: An enlarged cavity is provided at one end of the heating cavity abutting against the sealing ring. The enlarged cavity is matched with the outer edge of the needle seat, and the outer wall of the sealing ring abuts against the inner wall of the enlarged cavity.

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