Transmission device of electric toothbrush

• US 20030097723A1
• Filed: 11/27/2001
• Published: 05/29/2003
• Est. Priority Date: 11/27/2001
• Status: Abandoned Application

• Current Assignee: Shummi Enterprise Company Limited
• Original Assignee: Shummi Enterprise Company Limited
• Inventors: Li, Ming-Kuei
• Application Number:
  US09/993,557
• Publication Number:
  US 20030097723A1
• Time in Patent Office: Days
• US Class Current: 15/22.1
• CPC Class Codes: A61C 17/3436 Rotation around the axis perpendicular to the plane defined by the bristle holder

Abstract

A transmission device of electric toothbrush includes a handle assembly, a brush assembly, and a transmission mechanism. The handle assembly has a shaft coupled to the brush assembly so that the brush assembly is rotatable about the handle assembly. The transmission mechanism is mounted on the handle assembly and comprising a coupling member, a transmission shaft, the coupling member being coupled to the brush assembly so as to move together, a groove on the coupling member, and a transmission rod at one bent end of the transmission shaft being engaged within the groove. Hence, the brush assembly is operative to rotate and vibrate.

Claims

1. A transmission device of electric toothbrush including a handle assembly, a brush assembly, and a transmission mechanism, said handle assembly having a shaft coupled to said brush assembly so that said brush assembly being rotatable about said handle assembly, said transmission mechanism being mounted on said handle assembly and comprising a coupling member, a transmission shaft, said coupling member being coupled to said brush assembly so as to move together, a groove on said coupling member, and a transmission rod at one bent end of said transmission shaft being engaged within said groove whereby said brush assembly is operative to rotate and vibrate.

2. The transmission device of electric toothbrush of claim 1, wherein said handle assembly further comprises a recess and a cylindrical member rotatably coupled to said brush assembly by an insertion of said shaft into said recess.

3. The transmission device of electric toothbrush of claim 2, wherein said cylindrical member is integrally formed with said handle assembly and said handle assembly is rotatably coupled said brush assembly by the insertion of said shaft into said recess.

4. The transmission device of electric toothbrush of claim 1, wherein said handle assembly further comprises a receiving space for receiving said coupling member.

5. The transmission device of electric toothbrush of claim 1, wherein said handle assembly further comprises an elongate handle and a channel surrounded by said handle, said channel being in communication with the receiving space and for receiving said transmission shaft.

6. The transmission device of electric toothbrush of claim 1, wherein said brush assembly comprises a plurality of apertures for receiving a plurality of bristles extending upwardly.

7. The transmission device of electric toothbrush of claim 1, wherein said transmission mechanism further comprises a pin passed through said coupling member to secure to said brush assembly.

8. The transmission device of electric toothbrush of claim 1, wherein said transmission rod is parallel to said transmission shaft.

9. The transmission device of electric toothbrush of claim 1, wherein said transmission rod is at a predetermined angle with respect to said transmission shaft.

10. The transmission device of electric toothbrush of claim 1, wherein said groove has a width wider than a diameter of said transmission rod.