Anti-falling dental drill

Abstract

The utility model discloses an anti-falling dental drill which comprises a drill bit and an extension bar, a handle rod is arranged at the end of the drill bit, an annular groove is formed in the circumferential side of one end of the handle rod, and a concave part is arranged at the end. A handle sleeve is arranged at one end of the lengthening rod, a clamping groove is formed in the end of the handle sleeve, the handle rod penetrates through the clamping groove, a protruding block is arranged on the side wall of the clamping groove, the protruding block is matched with the concave part during application, two elastic pieces are further arranged in the clamping groove, the elastic pieces are located on the two sides of the protruding block respectively, and at least one part of each elastic piece is located in the annular groove. Two through grooves penetrating to the outer wall of the lengthening rod are formed in the clamping groove and located in the sides, close to the protruding blocks, of the elastic pieces correspondingly so that the elastic pieces can be machined conveniently. The section of the elastic sheet is trapezoidal, and the top of the elastic sheet is arc-shaped. A groove communicated with the clamping groove is formed in the side face of the handle sleeve, and the opening direction of the groove is perpendicular to the surface of the protruding block. An annular limiting groove is formed in the circumferential side of the other end of the lengthening rod in the circumferential direction, and a notch is formed in the end of the other end of the lengthening rod, so that connection and fixation are facilitated. And the dental drill is prevented from falling off through the limiting of the elastic sheet, so that the treatment operation is ensured to be carried out smoothly.

Description

Technical Field

[0001] The utility model relates to the technical field of dental drills, in particular to an anti-falling dental drill. Background Art

[0002] A dental drill is an instrument mainly used for grinding, drilling and gum processing of teeth. In order to cope with the scenario of deep drilling or processing of teeth with a large depth, an ordinary dental drill cannot reach the required depth. At this time, it is necessary to extend the length of the dental drill through an extension rod. However, in actual use, in order to facilitate the coordination of the dental drill and the extension rod, the dental drill and the extension rod are usually connected through a transition fit to prevent the dental drill from falling through friction. When the dental drill is in a vertical state in the patient's mouth, the dental drill will rotate, which will cause the dental drill to vibrate. At the same time, under the action of gravity, there may also be a risk of the dental drill falling, which is not conducive to the smooth progress of the treatment operation. Utility Model Content

[0003] In view of the above-mentioned deficiencies in the related prior art, the present application provides an anti-falling dental drill, which prevents the dental drill from falling off by limiting the position of a spring piece, thereby ensuring the smooth progress of the treatment operation and having strong practicality.

[0004] In order to achieve the above purpose, the utility model adopts the following technologies:

[0005] An anti-drop-out dental drill comprises a drill bit and an extension rod.

[0006] A handle rod is provided at the end of the drill bit, a ring groove is provided on the circumference of one end of the handle rod, and a recess is provided at the end; a handle sleeve is provided at one end of the extension rod, a slot is provided at the end of the handle sleeve, the handle rod is inserted into the slot, a protrusion is provided on the side wall of the slot, and when in use, the protrusion cooperates with the recess, two spring sheets are also provided in the slot, and the spring sheets are respectively located on both sides of the protrusion, and at least a part of the spring sheet is located in the ring groove.

[0007] Furthermore, two through grooves penetrating to the outer wall of the extension rod are provided in the clamping slot, and the through grooves are respectively located on one side of the spring sheet close to the protrusion to facilitate the processing of the spring sheet.

[0008] Furthermore, the cross section of the spring piece is trapezoidal, and the top is arc-shaped.

[0009] Furthermore, a groove connected to the clamping slot is provided on the side surface of the handle sleeve, and the opening direction of the groove is perpendicular to the surface of the protrusion.

[0010] Furthermore, an annular limiting groove is provided on the circumferential side of the other end of the extension rod along the circumferential direction, and a notch is provided at the end of the other end of the extension rod to facilitate connection and fixation.

[0011] The utility model has the beneficial effects of preventing the dental drill from falling off through the cooperation between the spring piece and the annular groove, thereby ensuring the smooth progress of the treatment operation; and a through groove is provided on one side of the spring piece to facilitate the removal of the material at the bottom of the spring piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present invention.

[0013] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0014] Figure 2 It is a schematic diagram of the cross-sectional structure decomposition of an embodiment of the present application. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings, but the embodiments described in the utility model are only part of the embodiments of the utility model, rather than all the embodiments.

[0016] like Figure 1-Figure 2 As shown, this example provides an anti-falling dental drill, including: a drill bit 1 and an extension rod 2.

[0017] A handle rod 11 is provided at the end of the drill bit 1, an annular groove 12 is provided on the circumference of one end of the handle rod 11, and a recess 13 is provided at the end; a handle sleeve 21 is provided at one end of the extension rod 2, a groove 22 is provided at the end of the handle sleeve 21, the handle rod 11 is inserted into the groove 22, and a protrusion 23 is provided on the side wall of the groove 22. At this time, the protrusion 23 cooperates with the recess 13, so that the drill bit 1 can rotate with the extension rod 2, and two spring pieces 24 are also provided in the groove 22, and the spring pieces 24 are respectively located on both sides of the protrusion 23, and at least a part of the spring piece 24 is located in the annular groove 12, so as to prevent the drill bit 1 from falling off under the action of gravity or other external forces.

[0018] Specifically, two through slots 25 penetrating the outer wall of the extension rod 2 are provided in the slot 22 , and the through slots 25 are respectively located on one side of the spring piece 24 close to the protrusion 23 , so as to facilitate the processing of the spring piece 24 and remove the material at the bottom of the spring piece.

[0019] Specifically, the cross-section of the spring piece 24 is trapezoidal and the top is arc-shaped. When the handle rod 11 is pushed into the slot 22, the side of the spring piece 24 will contact the edge of the handle rod 11 and force the spring piece 24 to deform until the spring piece 24 completely enters the annular groove 12, thereby clamping the handle rod 11.

[0020] Specifically, a groove 26 connected to the slot 22 is provided on the side of the handle sleeve 21 , and the opening direction of the groove 26 is perpendicular to the surface of the protrusion 23 , so as to facilitate observation of whether the spring piece 24 is stuck in the annular groove 12 and also facilitate processing of the spring piece 24 .

[0021] Specifically, an annular limiting groove 27 is provided along the circumferential direction on the circumferential side of the other end of the extension rod 2, and a notch 28 is provided at the end of the other end of the extension rod 2 to facilitate connection and fixation.

[0022] Since the above are only preferred embodiments of the present invention and are not intended to limit the present invention, it is obvious that those skilled in the art can make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. An anti-falling dental drill, characterized in that: include: A drill bit (1) is provided with a handle (11) at the end thereof, a ring groove (12) is provided on the circumference of one end of the handle (11), and a recess (13) is provided at the end thereof; An extension rod (2) is provided with a handle sleeve (21) at one end, a slot (22) is provided at the end of the handle sleeve (21), the handle rod (11) is inserted into the slot (22), a convex block (23) is provided on the side wall of the slot (22), and when in use, the convex block (23) cooperates with the concave portion (13), two spring sheets (24) are further provided in the slot (22), and the spring sheets (24) are respectively located on both sides of the convex block (23), and at least a part of the spring sheet (24) is located in the annular groove (12).

2. The anti-falling dental drill according to claim 1, characterized in that: The clamping slot (22) is provided with two through slots (25) penetrating the outer wall of the extension rod (2). The through slots (25) are respectively located on one side of the spring sheet (24) close to the protrusion (23) to facilitate processing of the spring sheet (24).

3. The anti-dropout dental drill according to claim 1, characterized in that: The spring sheet (24) has a trapezoidal cross section and an arc-shaped top.

4. The anti-falling dental drill according to claim 2, characterized in that: A groove (26) connected to the clamping groove (22) is provided on the side surface of the handle sleeve (21), and the opening direction of the groove (26) is perpendicular to the surface of the protrusion (23).

5. The anti-dropout dental drill according to claim 1, characterized in that: An annular limiting groove (27) is provided on the circumferential side of the other end of the extension rod (2) along the circumferential direction, and a notch (28) is provided at the end of the other end of the extension rod (2).

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