Dental handpiece rear cover sealing structure

Abstract

The utility model discloses a dental handpiece rear cover sealing structure which comprises a handle, a rear cover is arranged at the bottom end of the handle, the rear cover is connected with the handle in an inserted mode, sealing structures are arranged at the two ends, close to the rear cover, of the handle, and each sealing structure comprises a fixing plate, a screw penetrates through the fixing plate, a moving block is arranged on the surface of the screw in a sleeved mode, and a connecting rod is arranged at the end, perpendicular to the screw, of the moving block. A movable column is arranged at the upper end of the connecting rod and penetrates through the upper end of the fixing plate, a pressing plate is arranged at the upper end of the movable column, and the lower end of the pressing plate is attached to the rear cover. Compared with the prior art, the dental handpiece has the advantages that a handle and a rear cover of the dental handpiece can be sealed, and the rear cover can be conveniently detached.

Description

Technical Field

[0001] The utility model relates to the technical field of dental handpieces, in particular to a sealing structure for the rear cover of a dental handpiece. Background Art

[0002] During oral surgeries, it is often necessary to cut, drill, and polish tooth bodies. Therefore, high-speed dental handpieces are essential medical devices. High-speed dental handpieces are also classified into many categories, and different types of high-speed dental handpieces have different functions. During an oral surgery, due to the complicated operations, it is necessary to replace multiple high-speed dental handpieces for different operations to ensure the safe and efficient completion of the surgery.

[0003] The patent with the patent number CN215821223U in the prior art discloses a dental handpiece, which includes a dental handpiece body. A channel is provided inside the dental handpiece body. A threaded hole is provided at the bottom end inside the dental handpiece body. A connector is inserted into the hollow cylinder. An external thread is connected to the outside of the connector, and the external thread is connected to the threaded hole. A clamping groove is provided at the upper end of the connector. A second oil-absorbing material pad is connected to the clamping groove. The outside of the second oil-absorbing material pad is in contact with the dental handpiece body. A groove is provided on the second oil-absorbing material pad, and a sealing pad is connected to the groove. The upper end of the sealing pad is in contact with the dental handpiece body. The utility model absorbs the lubricating oil leaking from between the connector and the dental handpiece body through the second oil-absorbing material pad. During the sterilization process of the dental handpiece, the lubricating fluid inside the dental handpiece body cannot leak.

[0004] However, the patent in the prior art has the following disadvantages:

[0005] (1) In the prior art, the rear cover and the handle are connected through a threaded hole and a screw. Long-term use in a liquid environment may cause problems with the connection, and it is not convenient for the installation and disassembly of the rear cover.

[0006] (2) The sealing structure in the prior art is fixed and located inside the handle of the handpiece, which is not convenient for flexible use, and it is not easy to disassemble and replace when the sealing performance fails. Summary of the Utility Model

[0007] The technical problem to be solved by the utility model is to overcome the above technical defects and provide a sealing structure for the rear cover of a dental handpiece that can not only seal the handle and the rear cover of the dental handpiece but also facilitate the disassembly of the rear cover.

[0008] To solve the above problems, the technical solution of the present utility model is as follows: A sealing structure for the rear cover of a dental handpiece, including a handle, a rear cover is provided at the bottom end of the handle, the rear cover is inserted into the handle, and sealing structures are provided at both ends of the handle close to the rear cover. The sealing structure includes a fixing plate, a screw rod is penetrated inside the fixing plate, a moving block is sleeved on the surface of the screw rod, a connecting rod is provided at one end of the moving block perpendicular to the screw rod, a limiting groove is provided on the inner side wall of the fixing plate, the connecting rod is slidably connected to the limiting groove, a moving column is provided at the upper end of the connecting rod, the moving column penetrates through the upper end of the fixing plate, and a pressing plate is provided at the upper end of the moving column. The lower end of the pressing plate fits against the rear cover;

[0009] Further, connecting blocks are provided at both ends of the lower end of the rear cover, a groove is provided inside the connecting block, a first spring is provided inside the groove, and an inserting block is provided at the other end of the first spring.

[0010] Further, a slot and a sliding groove are provided inside the side wall of the handle, the slot and the sliding groove are partitioned by a partition board, a moving rod is penetrated inside the slot and the sliding groove, a button is provided at one end of the moving rod located inside the sliding groove, and a second spring is provided on the surface of the moving rod.

[0011] Further, one end of the second spring is fixedly connected to the button, the other end of the second spring is fixedly connected to the partition board, the moving rod slides inside the partition board, and a top block is provided at one end of the moving rod located inside the slot.

[0012] Further, one end of the inserting block close to the handle is beveled, the inserting block is inserted into the slot, and the inserting block contacts the top block.

[0013] Further, a sealing ring is provided between the handle and the rear cover, a turntable is provided at the lower end of the screw rod, anti-slip lines are provided on the surface of the turntable, and a threaded sleeve is provided at the other end of the screw rod.

[0014] The advantages of the present utility model compared with the existing technology are as follows:

[0015] (1) In the present utility model, when the inserting block is squeezed by the inner wall of the handle, the inserting block compresses the first spring and enters the groove, and the first spring resets to insert the inserting block into the slot, which is convenient for the installation of the rear cover. Pressing the button causes the button to squeeze the second spring inward and drive the moving rod to move. The moving rod drives the top block to push the inserting block out of the slot, so that the rear cover can be conveniently disassembled;

[0016] (2) In the present utility model, rotating the turntable drives the screw rod to drive the moving block to move downward, thereby driving the connecting rod to move downward in the limiting groove, and then driving the pressing plate to move downward through the moving column, so that the pressing plate presses the rear cover tightly, improving the sealing performance of the rear cover. Description of the Drawings

[0017] Figure 1 is a three-dimensional view of a sealing structure for the rear cover of a dental handpiece of the present utility model.

[0018] Figure 2 It is a side sectional view of a sealing structure for the rear cover of a dental handpiece according to the present utility model.

[0019] Figure 3 It is an enlarged view of part A of a sealing structure for the rear cover of a dental handpiece according to the present utility model.

[0020] Figure 4 It is a front sectional view of a sealing structure for the rear cover of a dental handpiece according to the present utility model.

[0021] Figure 5 It is an enlarged view of part B of a sealing structure for the rear cover of a dental handpiece according to the present utility model.

[0022] As shown in the figure: 1. Handle; 2. Rear cover; 3. Sealing structure; 4. Fixed plate; 5. Screw; 6. Moving block; 7. Connecting rod; 8. Limiting groove; 9. Moving column; 10. Pressing plate; 11. Connecting block; 12. First spring; 13. Insert block; 14. Insert slot; 15. Sliding groove; 16. Moving rod; 17. Button; 18. Second spring; 19. Top block; 20. Sealing ring; 21. Turntable; 22. Threaded sleeve. Specific embodiments

[0023] The following will further illustrate the specific embodiments of the present utility model with reference to the accompanying drawings. Among them, the same parts are denoted by the same reference numerals.

[0024] It should be noted that the terms "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the accompanying drawings, and the terms "inner" and "outer" respectively refer to the directions towards or away from the geometric center of a specific component.

[0025] In order to make the content of the present utility model more clearly understood, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

[0026] As Figures 1 to 5 shown, a sealing structure for the rear cover of a dental handpiece includes a handle 1 and a rear cover 2. The rear cover 2 is inserted into the inside of the handle 1, and a sealing ring 20 is installed between the rear cover 2 and the handle 1 to enhance the sealing effect. Sealing structures 3 are installed at both ends of the handle 1. The sealing structure 3 includes a fixed plate 4, and the fixed plates 4 are symmetrically installed at both ends of the handle 1. A slidable moving column 9 is installed through the upper end of the fixed plate 4, and a pressing plate 10 is installed at the upper end of the moving column 9. The pressing plate 10 is used to press the rear cover 2 to further improve the sealing performance between the rear cover 2 and the handle 1.

[0027] A limiting groove 8 is formed inside the fixing plate 4. One end of the transverse connecting rod 7 installed at the lower end of the moving column 9 slides in the limiting groove 8, so as to drive the moving column 9 to move up and down conveniently. The other end of the connecting rod 7 is installed with a moving block 6 sleeved on the surface of the screw rod 5. The moving block 6 is threadedly connected with the screw rod 5. When the screw rod 5 rotates, the connecting rod 7 slides in the limiting groove 8, so that the moving block 6 can be restricted from moving up and down.

[0028] A turntable 21 is installed at the lower end of the screw rod 5 to facilitate the rotation of the screw rod 5. The surface of the turntable 21 has anti-slip lines to prevent the hand from slipping when the screw rod 5 rotates. The upper end of the screw rod 5 is installed inside the threaded sleeve 22 to facilitate the rotation of the screw rod 5.

[0029] A connecting block 11 is installed at the connection between the rear cover 2 and the handle 1. An insertion block 13 is installed near the inner wall of the handle 1 of the connecting block 11. The insertion block 13 can be inserted into the slot 14 formed in the inner wall of the handle 1. The surface of the insertion block 13 is inclined, which is convenient for the insertion block 13 to squeeze the first spring 12 through the inclined surface when entering the handle 1, so that the insertion block 13 is compressed into the groove inside the connecting block 11. After the first spring 12 is compressed, the elastic force can push the insertion block 13 into the slot 14, thus completing the installation of the rear cover 2 and the handle 1.

[0030] The slot 14 is separated by a partition plate to form a sliding groove 15. The moving rod 16 passes through the partition plate and slides inside the slot 14 and the sliding groove 15. A top block 19 is installed at one end of the moving rod 16 located in the slot 14. The top block 19 contacts the insertion block 13. The top block 19 is used to push out the insertion block 13, so that the insertion block 13 is separated from the slot 14, thus facilitating the disassembly of the rear cover 2. A button 17 is installed at one end of the moving rod 16 located inside the sliding groove 15. Pressing the button 17 drives the moving rod 16 to move, thus driving the top block 19 to move. A second spring 18 is installed on the surface of the moving rod 16. The two ends of the second spring 18 are respectively installed on the button 17 and the partition plate. The second spring 18 is used to restore the button 17 and the top block 19, facilitating the reinstallation of the rear cover 2.

[0031] Specific implementation method: Rotate the screw rod 5 through the turntable 21 to drive the moving block 6 to move upward, so as to drive the connecting rod 7 to move upward in the limiting groove 8, and then drive the pressing plate 10 to move upward through the moving column 9, facilitating the installation of the rear cover 2. When the rear cover 2 is inserted into the handle 1, the insertion block 13 is squeezed by the inner wall of the handle 1. The insertion block 13 compresses the first spring 12 and enters the groove. When the first spring 12 resets, it inserts the insertion block 13 into the slot 14 inside. Rotate the screw rod 5 through the turntable 21 to make the pressing plate 10 move downward to press the rear cover 2 tightly, thus improving the sealing performance of the rear cover. When it is necessary to disassemble the rear cover 2, also rotate the screw rod 5 to make the pressing plate 10 move upward, and then press the button 17 to make the button 17 squeeze the second spring 18 inward and drive the moving rod 16 to move. The moving rod 16 drives the top block 19 to push the insertion block 13 out of the slot 14, thus facilitating the disassembly of the rear cover 2.

[0032] The above describes the present utility model and its implementation manners. Such description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present utility model, and the actual structure is not limited thereto. In summary, if those of ordinary skill in the art are inspired by it and, without departing from the gist of the creation of the present utility model, design similar structural manners and embodiments to this technical solution without creative efforts, they shall fall within the protection scope of the present utility model.

Claims

1. A sealing structure for the rear cover of a dental handpiece, characterized in that: It includes a handle (1), and a rear cover (2) is provided at the bottom end of the handle (1). The rear cover is inserted into the handle (1). Sealing structures (3) are provided at both ends of the handle (1) close to the rear cover (2). The sealing structure (3) includes a fixing plate (4). A screw rod (5) penetrates through the inside of the fixing plate (4). A moving block (6) is sleeved on the surface of the screw rod (5). One end of the moving block (6) perpendicular to the screw rod (5) is provided with a connecting rod (7). A limiting groove (8) is provided on the inner side wall of the fixing plate (4). The connecting rod (7) is slidably connected to the limiting groove (8). The upper end of the connecting rod (7) is provided with a moving column (9). The moving column (9) penetrates through the upper end of the fixing plate (4). A pressing plate (10) is provided at the upper end of the moving column (9). The lower end of the pressing plate (10) is attached to the rear cover (2).

2. The sealing structure of the rear cover of a dental handpiece according to claim 1, wherein: Connecting blocks (11) are provided at both ends of the lower end of the rear cover (2). A groove is provided inside the connecting block (11). A first spring (12) is provided inside the groove. The other end of the first spring (12) is provided with a plug (13).

3. The sealing structure of the dental handpiece rear cover according to claim 1, characterized in that: Slots (14) and chutes (15) are provided inside the side wall of the handle (1). The slots (14) and the chutes (15) are separated by a partition. A moving rod (16) penetrates through the inside of the slots (14) and the chutes (15). One end of the moving rod (16) located inside the chute (15) is provided with a button (17). A second spring (18) is provided on the surface of the moving rod (16).

4. A sealing structure for the rear cover of a dental handpiece according to claim 3, characterized in that: One end of the second spring (18) is fixedly connected to the button (17), and the other end of the second spring (18) is fixedly connected to the partition. The moving rod (16) slides inside the partition. One end of the moving rod (16) located inside the slot is provided with a top block (19).

5. The sealing structure of the rear cover of a dental handpiece according to claim 2, characterized in that: One end of the plug (13) close to the handle (1) is beveled. The plug (13) is inserted into the slot (14), and the plug (13) contacts the top block (19).

6. The sealing structure of the rear cover of a dental handpiece according to claim 1, characterized in that: A sealing ring (20) is provided between the handle (1) and the rear cover. A turntable (21) is provided at the lower end of the screw rod (5). Anti-slip patterns are provided on the surface of the turntable (21). A threaded sleeve (22) is provided at the other end of the screw rod (5).

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