Special dental drill for oral cavity

Abstract

The utility model belongs to the technical field of oral dental drills, and particularly relates to a dental drill special for an oral cavity. Comprising a handle, the right end of a second connecting plate is a cambered surface, and a plurality of locking grooves are formed in the cambered surface of the second connecting plate on the rear side; a connecting column is horizontally arranged between the two first connecting plates, a sleeve is fixed to the inner side wall of the first connecting plate located on the front side, the front end of the connecting column is independently installed in the sleeve in a penetrating mode, the connecting column is sleeved with a first limiting ring, and a thrust assembly for pushing the connecting column to move backwards is arranged between the first connecting plate located on the front side and the first limiting ring. A button is fixed to the rear end of the connecting column, a key groove communicating inside and outside is formed in the first connecting plate on the rear side corresponding to the button, and the pressing end of the button penetrates out of the key groove and is located on the outer side of the first connecting plate. And a locking block is fixed on the connecting column. According to the angle-adjustable drill, the lock block is controlled by pressing the button to lock or unlock the lock groove, so that the drill with the angle adjusted can be conveniently locked.

Description

Technical Field

[0001] The utility model belongs to the technical field of oral dental drills, in particular to a special oral dental drill. Background Art

[0002] With the continuous advancement of dental treatment technology, oral pressure drilling technology has become an indispensable part of modern dental restoration and treatment. Oral pressure drilling technology mainly involves the use of special drills and equipment to perform precise cutting and shaping on the hard tissue of the teeth to achieve a variety of dental procedures such as tooth restoration, tooth preparation, root canal treatment, etc.

[0003] There is a dental drill with adjustable drill angle on the market, which is mainly used to improve the flexibility of the use of the dental drill. The angle of the drill bit can be adjusted according to the use requirements. It is mainly driven by a bevel gear, which can drive the drill bit to rotate and meet the needs of adjusting the drill bit angle at the same time. However, there is a disadvantage of this dental drill. After the drill bit angle is adjusted, the existing technology needs to lock the current angle by a screw, resulting in low adjustment efficiency and certain inconvenience. Utility Model Content

[0004] The utility model aims to provide a special dental drill for oral cavity, which can lock the drill bit after the angle is adjusted more conveniently.

[0005] The oral dental drill comprises a handle, a motor housing is fixed to the right end of the handle, two first connecting plates distributed front to back are fixed to the left end of the handle, a motor is installed in the motor housing, the handle is hollow in structure, a rotating shaft is independently installed in the handle, the right end of the rotating shaft is transmission-connected to the output end of the motor, an end head is arranged on the left side of the handle, a drill bit is installed on the left end of the end head, the drill bit and the left end of the rotating shaft are transmission-connected via a bevel gear mechanism, two second connecting plates distributed front to back are arranged on the right end of the end head, the two second connecting plates are located between the two first connecting plates and are respectively hinged by two hinge pins, the right end of the second connecting plate is an arc surface, and the arc of the arc surface The center is located on the center line of the hinge pin, and several locking grooves are provided on the arc surface of the second connecting plate on the rear side; a connecting column is horizontally arranged between the two first connecting plates, a sleeve is fixed on the inner wall of the first connecting plate on the front side, the front end of the connecting column is independently inserted into the sleeve, and a first limiting ring is mounted on the connecting column, and a thrust assembly for pushing the connecting column to move backward is provided between the first connecting plate located in the front and the first limiting ring, a button is fixed on the rear end of the connecting column, and a key slot communicating inside and outside is provided on the first connecting plate located on the rear side corresponding to the button, and the pressing end of the button passes through the key slot and is located on the outside of the first connecting plate; a locking block that can be locked in any locking slot is fixed on the connecting column.

[0006] Furthermore, the thrust assembly includes a spring, one end of which rests on the first limiting ring, and the other end of which rests on the first connecting plate located on the front side, and the spring is independently sleeved on the sleeve; when the spring is in a natural state, the locking block is locked in any locking groove.

[0007] Furthermore, a rotating sleeve is fixed to the right end of the end head, the second connecting plates are located in the rotating sleeve, the left end of the second connecting plate is fixed on the inner wall of the rotating sleeve, the rotating sleeve is located between the two first connecting plates, and the bevel gear mechanism is located in the rotating sleeve; a through groove communicating with the inside and outside is opened on the rotating sleeve corresponding to the rotating shaft, and the through grooves are distributed on the circumference of the rotating sleeve at an angle of 90 degrees to 135 degrees.

[0008] Furthermore, the bevel gear mechanism includes an active bevel gear, which is installed on the left end of the rotating shaft. A fixing column is fixed on the inner side wall of the second connecting plate. The center line of the fixing column is on the same straight line as the center line of the hinge pin. A freely rotatable transmission bevel gear is installed on the fixing column. The two transmission bevel gears are meshed with the active bevel gear. The same driven bevel gear is arranged on the left side of the two transmission bevel gears, and the driven bevel gear is meshed with the two transmission bevel gears. The interior of the end head is a hollow structure, and a freely rotatable connecting shaft is arranged in the end head. A through hole that communicates with the inside and outside is opened on the rotating sleeve corresponding to the connecting shaft. The right end of the connecting shaft independently passes through the through hole and is connected to the center of the driven bevel gear, and the left end of the connecting shaft is detachably connected to the drill bit.

[0009] Furthermore, the left end of the connecting shaft is connected to the drill bit through a connecting head.

[0010] Furthermore, the first connecting plate is disc-shaped.

[0011] Furthermore, a hinge hole communicating with the inside and outside is opened at the center of the first connecting plate, and a threaded blind hole is opened on the outer wall of the second connecting plate corresponding to the hinge hole. The connecting end of the hinge nail independently passes through the hinge hole and is threadedly matched with the threaded blind hole.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The utility model controls the locking block to lock or unlock the locking groove by pressing a button, thereby conveniently locking the drill bit after the angle is adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0015] Figure 2 for Figure 1 The enlarged structural diagram after the section at AA in the middle;

[0016] Figure 3It is a three-dimensional structural diagram of the utility model;

[0017] Figure 4 It is a three-dimensional structural diagram of the interior of the rotating sleeve;

[0018] Figure 5 It is the exploded structure diagram of the utility model;

[0019] Figure 6 for Figure 5 A schematic diagram of the local enlarged structure at B in the middle;

[0020] The names of the components in the figure are: 1, handle 2, driving bevel gear 3, rotating sleeve 4, second connecting plate 5, connecting shaft 6, end 7, drill bit 8, connecting head 9, driven bevel gear 10, transmission bevel gear 11, fixed column 12, motor 13, motor housing 14, rotating shaft 15, button 16, second limiting ring 17, connecting column 18, first limiting ring 19, sleeve 20, spring 21, first connecting plate 22, hinge nail 23, locking block. DETAILED DESCRIPTION

[0021] The present invention is further described below through specific embodiments in conjunction with the accompanying drawings, but the present invention is not limited thereto. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

[0022] Example

[0023] The dental drill described in this embodiment is as follows: Figures 1 to 6 As shown, it includes a handle 1, a motor housing 13 is fixed to the right end of the handle 1, two first connecting plates 21 distributed front and back are fixed to the left end of the handle 1, the first connecting plate 21 is disc-shaped, a motor 12 is installed in the motor housing 13, the handle 1 is hollow, a rotating shaft 14 is independently installed inside the handle 1, the rotating shaft 14 is located in the handle 1 and can rotate freely, the right end of the rotating shaft 14 is transmission-connected to the output end of the motor 12, and the rotating shaft 14 can be driven to rotate by the motor 12, an end head 6 is arranged on the left side of the handle 1, a drill bit 7 is installed on the left end of the end head 6, and two second connecting plates 4 distributed front and back are arranged on the right end of the end head 6, the two second connecting plates 4 are located between the two first connecting plates 21 and are respectively hinged by two hinge pins 22;

[0024] like Figure 1As shown, a driving bevel gear 2 is installed on the left end of the rotating shaft 14, and a fixing column 11 is fixed on the inner side wall of the second connecting plate 4. The center line of the fixing column 11 is on the same straight line as the center line of the hinge pin 22. A freely rotatable transmission bevel gear 10 is installed on the fixing column 11. The two transmission bevel gears 10 are meshed with the driving bevel gear 2. The left side of the two transmission bevel gears 10 is provided with the same driven bevel gear 9, which is meshed with the two transmission bevel gears 10. The end head 6 has a hollow structure inside, and a freely rotatable connecting shaft 5 is provided inside the end head 6. A through hole communicating with the inside and outside is opened on the rotating sleeve 3 corresponding to the connecting shaft 5. The right end of the connecting shaft 5 independently passes through the through hole and is connected to the center of the driven bevel gear 9. The left end of the connecting shaft 5 is detachably connected to the drill bit 7. This section as a whole constitutes a bevel gear mechanism that is transmission-connected between the rotating shaft 14 and the drill bit 7.

[0025] like Figure 5 As shown, when in use, the motor 12 drives the rotating shaft 14 to rotate, the rotating shaft 14 drives the active bevel gear 2 to rotate, the active bevel gear 2 simultaneously drives the two transmission bevel gears 10 to rotate, the two transmission bevel gears 10 drive the driven bevel gear 9 to rotate, the driven bevel gear 9 drives the connecting shaft 5 to rotate, and the connecting shaft 5 drives the drill bit 7 to rotate; the end head 6 is hinged with the first connecting plate 21 through the second connecting plate 4, and when the angle of the connecting shaft 5 changes, the driven bevel gear 9 can still maintain meshing transmission with the transmission bevel gear 10;

[0026] like Figure 2 As shown, a hinge hole communicating with the inside and outside is opened at the center of the first connecting plate 21, and a threaded blind hole is opened on the outer wall of the second connecting plate 4 corresponding to the hinge hole, and the connecting end of the hinge nail 22 independently passes through the hinge hole and is threadedly matched with the threaded blind hole; the center line of the hinge nail 22 and the center line of the fixing column 11 are on the same straight line, so when the second connecting plate 4 swings, its rotation center is located on the center line of the hinge nail 22, and at the same time, the center line of the fixing column 11 and the hinge nail 22 are on the same straight line, so when the angle of the end 6 changes, the driven bevel gear 9 rotates around the transmission bevel gear 10 and always keeps meshing with it;

[0027] like Figure 4As shown, a rotating sleeve 3 is fixed to the right end of the end head 6, and the second connecting plates 4 are all located in the rotating sleeve 3. The left end of the second connecting plate 4 is fixed to the inner side wall of the rotating sleeve 3. The rotating sleeve 3 is located between the two first connecting plates 21, and the bevel gear mechanism is located in the rotating sleeve 3; a through groove communicating with the inside and outside is opened on the rotating sleeve 3 corresponding to the rotating shaft 14, and the through grooves are distributed on the circumference of the rotating sleeve 3 at an angle of 90 degrees to 135 degrees; the right end of the end head 6 is fixed to the outer side wall of the rotating sleeve 3. When the end head 6 swings, the rotating sleeve 3 rotates with the center of the hinge pin 22 as the center of the circle. At the same time, the rotating shaft 14 passes through the through groove, and in order to avoid motion conflict, the through groove is The arc angle of the groove on the circumference of the rotating sleeve 3 should be greater than 90 degrees and less than 135 degrees; if the angle adjustment of the drill bit 7 is to be achieved, the swing arc of the end head 6 is between 90 degrees and 0 degrees, so the rotating sleeve 3 will also rotate at least 90 degrees, so the minimum angle of the through groove cannot be less than 90 degrees; the rotating sleeve 3 mainly protects the internal bevel gear mechanism and avoids human contact, so the through groove not only meets the requirement of not generating movement conflict with the rotating shaft 14, but also avoids leaving too much gap for foreign matter to enter the rotating sleeve 3, so the angle of the through groove can be 90 degrees, 110 degrees, 120 degrees, 135 degrees or any value between 90 degrees and 135 degrees;

[0028] like Figure 1 As shown, the left end of the connecting shaft 5 is connected to the drill bit 7 through a connecting head 8; the connecting head 8 is a universal connecting head of the drill bit 7 in the prior art, and all dental drills on the market have this structure, which is mainly used for the replacement of different types of dental drills. The connecting head 8 is located inside the end head 6 and connected to the left end of the rotating shaft 14, and the two are on the same axis.

[0029] like Figures 4 to 6 As shown, the right end of the second connecting plate 4 is an arc surface, the arc center of the arc surface is located on the center line of the hinge pin 22, and a plurality of locking grooves are provided on the arc surface of the second connecting plate 4 at the rear side; a connecting column 17 is horizontally arranged between the two first connecting plates 21, a sleeve 19 is fixed on the inner side wall of the first connecting plate 21 at the front side, and the front end of the connecting column 17 is independently installed in the sleeve 19, and a first limiting ring 18 is sleeved on the connecting column 17, and a spring 20 (which pushes the connecting column 17 to move backward) is arranged between the first connecting plate 21 at the front and the first limiting ring 18. Thrust assembly), one end of the spring 20 rests on the first limit ring 18, and the other end thereof rests on the first connecting plate 21 located on the front side, and the spring 20 is independently sleeved on the sleeve 19; the spring 20 is in a natural state, the locking block 23 is locked in any locking groove, and a button 15 is fixed to the rear end of the connecting column 17, and a key groove communicating with the inside and outside of the corresponding button 15 is opened on the first connecting plate 21 located on the rear side, and the pressing end of the button 15 passes through the key groove and is located on the outside of the first connecting plate 21; a locking block 23 that can be locked in any locking groove is fixed on the connecting column 17.

[0030] In actual use, the button 15 is pressed to push the connecting column 17 to move backward, and the locking block 23 is disengaged from the locking groove. At this time, the swing end 6 can adjust the angle of the drill bit 7. When the drill bit 7 is adjusted to the specified angle, the button 15 is released, and the locking block 23 is pushed by the spring 20 to return to the locking groove and lock the second connecting plate 4 again, so that the drill bit 7 after the adjusted angle can be simply and conveniently completed, thereby making work more convenient; of course, the locking block 23 does not just lock its groove every time the second connecting plate 4 rotates. After releasing the button 15, the locking block 23 may appear to be against the inner side wall of the second connecting plate 4. At this time, it is only necessary to continue to rotate the second connecting plate 4 so that the locking block 23 is locked in the locking groove closest to it; in order to prevent the button 15 from running out of the key groove during transition, a second limiting ring 16 can be set at the front end of the connecting column 17, and its diameter is larger than the width of the key groove.

[0031] In this embodiment, the center position close to the two first connecting plates 21 is the inner side, and the center position far away is the outer side.

Claims

1. A dental drill for oral cavity, comprising a handle (1), a motor housing (13) being fixed to the right end of the handle (1), two first connecting plates (21) being fixed to the left end of the handle (1), a motor (12) being installed in the motor housing (13), the handle (1) being hollow in structure, a rotating shaft (14) being independently installed in the handle (1), the right end of the rotating shaft (14) being transmission-connected to the output end of the motor (12), a terminal (6) being arranged on the left end of the terminal (6), a drill bit (7) being installed on the left end of the terminal (6), the drill bit (7) being transmission-connected to the left end of the rotating shaft (14) through a bevel gear mechanism, two second connecting plates (4) being arranged on the right end of the terminal (6), the two second connecting plates (4) being located between the two first connecting plates (21) and being hingedly connected through two hinge pins (22), characterized in that: The right end of the second connecting plate (4) is an arc surface, the arc center of which is located on the center line of the hinge pin (22), and a plurality of locking grooves are provided on the arc surface of the second connecting plate (4) at the rear side; a connecting column (17) is horizontally arranged between the two first connecting plates (21), a sleeve (19) is fixed on the inner side wall of the first connecting plate (21) at the front side, the front end of the connecting column (17) is independently installed in the sleeve (19), and a first limiting ring (18) is mounted on the connecting column (17). A thrust assembly for pushing the connecting column (17) to move backward is arranged between the first connecting plate (21) located in the front and the first limiting ring (18); a button (15) is fixed to the rear end of the connecting column (17); a key slot communicating with the inside and outside is opened on the first connecting plate (21) located at the rear side corresponding to the button (15); the pressing end of the button (15) passes through the key slot and is located on the outside of the first connecting plate (21); a locking block (23) that can be locked in any locking slot is fixed on the connecting column (17).

2. The oral dental drill according to claim 1, characterized in that: The thrust assembly comprises a spring (20), one end of the spring (20) rests on the first limiting ring (18), and the other end of the spring (20) rests on the first connecting plate (21) located at the front side, and the spring (20) is independently sleeved on the sleeve (19); when the spring (20) is in a natural state, the locking block (23) is locked in any locking groove.

3. The oral dental drill according to claim 1, characterized in that: A rotating sleeve (3) is fixed to the right end of the end head (6), the second connecting plates (4) are located inside the rotating sleeve (3), the left end of the second connecting plates (4) is fixed to the inner wall of the rotating sleeve (3), the rotating sleeve (3) is located between the two first connecting plates (21), and the bevel gear mechanism is located inside the rotating sleeve (3); a through groove communicating with the inside and outside is opened on the rotating sleeve (3) corresponding to the rotating shaft (14), and the through grooves are distributed on the circumference of the rotating sleeve (3) at an angle of 90 to 135 degrees.

4. The oral dental drill according to claim 3, characterized in that: The bevel gear mechanism comprises an active bevel gear (2), which is mounted on the left end of a rotating shaft (14). A fixing column (11) is fixed on the inner side wall of the second connecting plate (4), the center line of the fixing column (11) and the center line of the hinge pin (22) are on the same straight line, and a freely rotatable transmission bevel gear (10) is mounted on the fixing column (11). The two transmission bevel gears (10) are meshed with the active bevel gear (2). The two transmission bevel gears (10) are meshed with the active bevel gear (2). ) is provided with a same driven bevel gear (9) on the left side thereof, and the driven bevel gear (9) is meshed with two transmission bevel gears (10); the interior of the end head (6) is a hollow structure, and a freely rotatable connecting shaft (5) is provided in the end head (6), and a through hole communicating with the inside and outside is opened on the rotating sleeve (3) corresponding to the connecting shaft (5), and the right end of the connecting shaft (5) independently passes through the through hole and is connected to the center of the driven bevel gear (9), and the left end of the connecting shaft (5) is detachably connected to the drill bit (7).

5. The oral dental drill according to claim 4, characterized in that: The left end of the connecting shaft (5) is connected to the drill bit (7) via a connecting head (8).

6. The oral dental drill according to claim 1, characterized in that: The first connecting plate (21) is in the shape of a disc.

7. The oral dental drill according to claim 6, characterized in that: A hinge hole communicating with the inside and outside is provided at the center of the first connecting plate (21), and a threaded blind hole is provided on the outer wall of the second connecting plate (4) corresponding to the hinge hole, and the connecting end of the hinge pin (22) independently passes through the hinge hole and is threadedly matched with the threaded blind hole.

Images