Glue injection head heating structure
By designing a detachable injection head assembly and a threaded heating injection assembly, the problem of the existing injection head structure being difficult to disassemble is solved, the rotatable replacement of the silver needle and the improvement of heating efficiency are achieved, the replacement cost is reduced, and the operational flexibility and sealing are improved.
Patent Information
- Application Number
- CN202421968369.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-14
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-08-14
AI Technical Summary
The existing injection head heating structure is tightly assembled, resulting in a fixed setting of the silver needle. If it breaks, the entire injection head assembly needs to be replaced, which is costly and difficult to disassemble.
A glue injection head assembly is designed, including a silver needle, a glue placement cylinder, a limiting ring, a silver needle pressure piece and a glue injection shell. The assembly is fixed by a nut, the silver needle can be rotated and replaced, the limiting ring and the silver needle pressure piece are used for axial positioning, and the heating injection assembly is connected by a threaded connection. The push rod can be extended into the glue placement cylinder to push the gutta-percha.
The silver needle is detachable and rotatable, which makes replacement easy, reduces replacement costs, improves operational flexibility and heating efficiency, and enhances sealing and stability.
Smart Images
Figure CN223473930U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of dental hot melt gutta-percha filling instruments, and in particular to a heating structure for a dispensing head. Background Technology
[0002] Hot melt gutta-percha filling involves delivering heated and melted gutta-percha to the tooth site through the needle of the injection unit. Existing injection head heating structures are tightly assembled, forming a complex, integrated structure through various nested connection methods. This makes the structure difficult to disassemble, and the needle is fixed to the injection head assembly. Consequently, if the needle breaks during use, the entire injection head assembly must be replaced to replace the needle, resulting in high replacement costs. Utility Model Content
[0003] The purpose of this invention is to provide a heating structure for a dispensing head, thereby solving the aforementioned problems in the prior art.
[0004] The technical problem to be solved by this utility model is to provide the following technical solution: It includes a dispensing head assembly and a heating injection assembly. The dispensing head assembly includes a silver needle, a dispensing tube, a nut, a limiting ring, a silver needle pressing component, and a dispensing shell. The front end of the dispensing tube forms a stepped structure, and a first thread is provided at the small-diameter section near the large-diameter section. A limiting ring is fixedly provided at the front end of the dispensing tube. The front end of the silver needle passes through the limiting ring and the dispensing tube, extending out of the dispensing tube. The rear end of the silver needle is pressed onto the limiting ring by the silver needle pressing component. The silver needle pressing component has a through hole connected to the silver needle. The dispensing shell covers the stepped surface at the front end of the dispensing tube and is fixed by a nut connected to the first thread.
[0005] The beneficial effects of this utility model are as follows: In this dispensing head assembly, the silver needle is positioned at the front end of the dispensing cylinder via a limiting ring and a silver needle clamping component. The dispensing housing is fixed to the dispensing cylinder by a nut. When the silver needle breaks and needs to be replaced, the nut can be removed to remove the dispensing housing, making it reusable. Furthermore, the silver needle clamped to the limiting ring can be rotated as needed, facilitating the dispensing operation. In specific implementation, the silver needle clamping component is engaged on the dispensing cylinder to provide axial positioning for the silver needle.
[0006] Based on the above technical solution, the present invention can be further improved as follows.
[0007] Furthermore, the heating injection assembly includes a heat insulation shell, a heating cylinder, a heat insulation component, a positioning plate, a pressure block, and a push rod; the heat insulation component has a stepped through hole and is placed at the bottom of the heat insulation shell, with the small diameter section of the stepped through hole located at the inner end of the heat insulation shell; one end of the heating cylinder is limited and positioned within the large diameter section of the stepped through hole by the pressure block and the positioning plate; the other end of the heating cylinder is provided with an internal thread; the front end of the glue-dispensing cylinder has a large diameter section near the small diameter section with an internal thread matching the internal thread; the front end of the glue-dispensing cylinder has a large diameter section near the small diameter section with a second thread matching the internal thread; and the push rod extends into the heating cylinder through the stepped through hole.
[0008] Furthermore, it includes a first O-ring and a second O-ring. The glue-dispensing cylinder is provided with the first O-ring between the nut and the glue-dispensing shell, and the push rod is provided with the second O-ring between the heating cylinder and the heat insulation shell.
[0009] Furthermore, a damping sleeve is provided at the front end of the inner end of the glue-placement tube, located at the front end of the limiting ring, and the silver needle passes through the damping sleeve. Attached Figure Description
[0010] Figure 1 This is an exploded view of the structure of this utility model;
[0011] Figure 2 This is a cross-sectional view of the structure of this utility model;
[0012] The attached diagram lists the components represented by each number as follows:
[0013] 10. Dispensing head assembly; 11. Silver needle; 12. Nut; 13. First O-ring; 14. Dispensing cylinder; 15. Damping sleeve; 16. Limiting ring; 17. Silver needle clamping component; 18. Dispensing housing; 20. Heating injection structure; 21. Heat insulation shell; 22. Positioning plate; 23. Pressure block; 24. Heating cylinder; 25. Second O-ring; 26. Heat insulation component; 27. Push rod; 3. Gussardine. Detailed Implementation
[0014] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.
[0015] like Figure 1As shown in Embodiment 1 of this utility model, a glue head heating structure includes a glue injection head assembly 10 and a heating injection assembly 20. The glue injection head assembly 10 includes a silver needle 11, a glue placement cylinder 14, a nut 12, a limiting ring 16, a silver needle pressing member 17, and a glue injection shell 18. The front end of the glue placement cylinder 14 forms a stepped structure, and a first thread is provided at the small diameter section near the large diameter section. The limiting ring 16 is fixedly provided at the front end of the glue placement cylinder 14. The front end of the silver needle 11 passes through the limiting ring 16 and the glue placement cylinder 14 and extends out of the glue placement cylinder. The rear end of the silver needle 11 is pressed onto the limiting ring 16 by the silver needle pressing member 17. The silver needle pressing member 17 has a through hole connecting the silver needle 11 and the glue placement cylinder 14. The glue injection shell 18 covers the stepped surface at the front end of the glue placement cylinder 14 and is fixed by the nut 12 connected to the first thread.
[0016] This dispensing head assembly 10 has a silver needle 11 mounted at the front end of the dispensing cylinder 14 via a limiting ring 16 and a silver needle clamping member 17. The dispensing housing 18 is fixed to the dispensing cylinder 14 by a nut 12. When the silver needle breaks and needs replacement, the nut 12 can be removed to remove the dispensing housing 18, making it reusable. Furthermore, the silver needle 11, clamped to the limiting ring 16, can be rotated as needed for convenient dispensing operations. In specific implementation, the silver needle clamping member 17 is engaged with the dispensing cylinder 14 to provide axial positioning of the silver needle 11.
[0017] like Figure 1 As shown, Embodiment 2 of this utility model discloses a heating structure for a glue injection head. Based on Embodiment 1, the heating injection assembly 20 includes a heat insulation shell 21, a heating cylinder 24, a heat insulation component 26, a positioning plate 22, a pressure block 23, and a push rod 27. The heat insulation component 26 has a stepped through hole and is placed at the bottom of the heat insulation shell 21, with the small diameter section of the stepped through hole located at the inner end of the heat insulation shell 21. One end of the heating cylinder 24 is limited and positioned within the large diameter section of the stepped through hole by the pressure block and the positioning plate 22. The other end of the heating cylinder 24 is provided with an internal thread. The glue placement cylinder 14 has a second thread matching the internal thread at the large diameter section near the small diameter section at the front end of the glue placement cylinder 14. The push rod 27 extends into the heating cylinder 24 through the stepped through hole. In practical use, the heating injection assembly 20 can be installed on the dispensing head assembly 10 through the internal thread of the heating cylinder 24 and the second thread of the dispensing cylinder 14, and the push rod 27 can be inserted into the dispensing cylinder 14 to push and squeeze the rubber 3 inside the dispensing cylinder 14. The heating cylinder 24 and the dispensing cylinder 14 are assembled by threads, which improves the concentricity of the assembly and makes it more stable during use. At the same time, the heating cylinder 24 is sleeved on the outside of the dispensing cylinder 14, and the contact area is increased by the threaded engagement, which improves the heating efficiency.
[0018] This utility model, embodiment 3, provides a heating structure for a dispensing head. Based on embodiment 1, it includes a first O-ring 13 and a second O-ring 25. The first O-ring 13 is provided on the dispensing cylinder 14 located between the nut 12 and the dispensing housing 18. The second O-ring 25 is fitted onto the push rod 27 located between the heating cylinder 24 and the heat insulation shell 21. This improves the sealing performance of the dispensing head heating structure, preventing softened gutta-permeable 3 from seeping into the dispensing cylinder 14 and the heating cylinder 24 during use.
[0019] This utility model, embodiment 4, discloses a glue dispensing head heating structure. Based on embodiment 1, a damping sleeve 15 is provided at the front end of the glue dispensing cylinder 14, located at the front end of the limiting ring 16. The silver needle 11 passes through the damping sleeve 15. The damping sleeve 15 provides damping to the silver needle 11, allowing the silver needle 11 to be used at an adjustable angle and limiting its rotation during use to a certain extent, thus ensuring operational flexibility and accuracy.
[0020] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A heating structure for a dispensing head, characterized in that, The assembly includes a dispensing head assembly (10) and a heating injection assembly (20). The dispensing head assembly (10) includes a silver needle (11), a dispensing cylinder (14), a nut (12), a limiting ring (16), a silver needle pressing component (17), and a dispensing shell (18). The dispensing cylinder (14) has a stepped structure at its front end, and a first thread is provided at the small diameter section near the large diameter section. A limiting ring (16) is fixedly provided at the front end of the dispensing cylinder (14). The silver needle (11) 1) The front end extends out of the glue-holding tube through the limiting ring (16) and the glue-holding tube (14). The rear end of the silver needle (11) is pressed onto the limiting ring (16) by the silver needle pressing member (17). The silver needle pressing member (17) has a through hole connecting the silver needle (11) and the glue-holding tube (14). The glue-injection shell (18) covers the stepped surface at the front end of the glue-holding tube (14) and is fixed by the nut (12) connected to the first thread.
2. The dispensing head heating structure according to claim 1, characterized in that, The heating injection assembly (20) includes a heat insulation shell (21), a heating cylinder (24), a heat insulation component (26), a positioning plate (22), a pressure block (23), and a push rod (27). The heat insulation component (26) has a stepped through hole and is placed at the bottom of the heat insulation shell (21). The small diameter section of the stepped through hole is located at the inner end of the heat insulation shell (21). One end of the heating cylinder (24) is limited by the pressure block and the positioning plate (22) and is set in the large diameter section of the stepped through hole. The other end of the heating cylinder (24) is provided with an internal thread. The front end of the glue-placement cylinder (14) has a large diameter section close to the small diameter section and is provided with a second thread that matches the internal thread. The push rod (27) extends into the heating cylinder (24) through the stepped through hole.
3. The dispensing head heating structure according to claim 1, characterized in that, It also includes a first O-ring (13) and a second O-ring (25). The glue-filling cylinder (14) is located between the nut (12) and the glue-filling shell (18) and is provided with the first O-ring (13). The push rod (27) is located between the heating cylinder (24) and the heat insulation shell (21) and is provided with the second O-ring (25).
4. The dispensing head heating structure according to claim 1, characterized in that: The inner front end of the glue-filling cylinder (14) is provided with a damping sleeve (15) at the front end of the limiting ring (16), and the silver needle (11) passes through the damping sleeve (15).