Mechanised dental instrument

Mechanized dental equipment

Technical field

[01] The present invention relates to a mechanized dental appliance, especially a dental medical therapy appliance.

Background technique

[02] Generally speaking, a mechanized dental instrument is composed of a working part and a handle, and the handle is arranged at an end opposite to the working part. The handle of the dental instrument is equipped with a rotating drive device, which directly engages with a rotating drive device located upstream of the head of a handpiece at the installation position on the head of the handpiece, for example, in particular as FR 2 759 filed by the applicant 574 described.

[03] Such dental instruments are generally partially molded with plastic on the working part with multiple layers. The main drawback of this implementation method is that under the action of a large torque, the resistance of the gear teeth will cause the teeth to break or wear prematurely.

Summary of the invention

[04] The present invention aims to propose a mechanized dental instrument, which can solve all or part of the aforementioned shortcomings.

[05] To this end, the present invention relates to a mechanized dental instrument, which consists of a working part and a handle, the handle is arranged at the end opposite to the working part, the handle of the dental instrument is equipped with a rotary drive The device can be directly engaged with a rotating drive device located upstream of the head of a handpiece in the installation position on the head of the handpiece, characterized in that the drive device is composed of a shaft which is especially embedded on the shaft of the working part. A flat metal member is formed, the metal member has at least one opening, which is shaped in a multi-layer molding stage on the shaft, so that the plastic forming the handle can circulate, thereby ensuring that the driving device is rotatably connected to the shaft.

[06] According to an embodiment, the opening is formed such that a flat piece arranged on the shaft of the working part is matched with the central hole of the driving device, so that the shaft can pass through the central hole.

[07] According to a best feature, the driving device is formed by a flat piece, the teeth of which are punched out and then can be bent.

Description of the drawings

[08] With reference to the drawings and non-limiting embodiments, the above and other features of the present invention will be better understood. The drawings are as follows: [09] Figure 1 is a cross-sectional view of the mechanized dental instrument of the present invention; [10] Figure 2 is similar to Figure 1, showing an embodiment; [11] Figure 3 is a cross-sectional view of a gear used in the mechanized dental instrument Figures; [12] Figure 4 is a cross-sectional view of the mechanized dental instrument, showing the second embodiment; [13] Figure 5 shows the third embodiment of the dental instrument of the present invention; [14] Figure 6 is the fourth embodiment A cross-sectional view of the dental appliance of the invention.

detailed description

[15] Fig. 1 shows a mechanized dental appliance 1 for medical dental treatment. Such an instrument usually consists of a working part 2 and a handle 3 arranged at the end opposite to the working part 2, which is referred to as the "shaft" 2a in the following.

[16] The handle 3 of the dental instrument 1 is equipped with a gear-type rotating drive device 4, which directly engages with a rotating drive device located upstream of the head of a handpiece at an installation position on the head of the handpiece.

[17] According to the present invention, the driving device 4 is formed by a flat metal member, especially embedded on the shaft 2a, the metal member having at least one opening 5, which is shaped to be multi-layer molded on the shaft 2a At this stage, the plastic forming the handle 3 can be circulated, thereby ensuring that the driving device is rotatably connected to the shaft 2a.

[18] As shown in Fig. 1, the metal part 4 forming the driving device is equipped with four holes 5 regularly distributed. When the handle 3 is multi-layer molded on the shaft 2a of the working part, the plastic can be circulated.

[19] According to an embodiment shown in FIG. 2, the shaft 2a of the working part 2 has a flat piece 6. Therefore, after the metal member is positioned, the handle can be multi-layer molded so that the plastic contains the plastic through the opening 5. The flat piece 6 thus ensures a rotating connection.

[20] It should be pointed out that the metal part 4 is preferably formed by a flat piece, and then the teeth are punched to form the driving device, thereby ensuring a reduction in cost compared to the traditional solution, as shown in FIG. 3.

[21] In addition, a bevel gear pair must be used to ensure that the gear teeth are deformed to increase or decrease relative to the center of the gear when rotating and driving.

[22] According to the second embodiment of the present invention shown in FIG. 4, the working part 2, that is, the dental tool, passes through the handle 3 of the dental instrument 1.

[23] Figures 5 and 6 show an embodiment of the dental appliance 1, showing a protrusion 7 at the upper part of the handle 3. The protrusion surrounds the metal member 4 of the driving device on both sides, as shown in FIG. 5, or only surrounds the metal member 4 at the lower part thereof, as shown in FIG. 6. Such protrusions ensure that forces and/or currents are drawn.

[24] It can be seen from the above description that the dental appliance of the present invention is relatively simple to implement and can provide greater strength by driving.

[25] Although the present invention has been described in conjunction with two specific embodiments, the present invention includes all equivalent technologies of the components.