WO2009094820A1 - Brush head device of an electric tooth-brush - Google Patents

Abstract

A brush head device of an electric tooth-brush comprises a shaft (1) and a brush head (2). A brush head collar (3) is provided between the shaft (1) and the brush head (2). The brush head collar (3) is provided with an internal cavity (30) which has a shape corresponding to the shape of the upper end of the shaft (1). The upper end of the wall forming the internal cavity (30) is provided with an eccentric position (31) of the internal cavity. The upper end of the shaft (1) is provided with an eccentric position (11) of the shaft corresponding to the eccentric position (31) of the internal cavity. The eccentric position (31) of the internal cavity is closely coupled with the eccentric position (11) of the shaft. The lower end of the wall forming the internal cavity (30) is provided with a first fastener flange (32) projected inwardly. A first fastener groove (12) is provided on the peripheral surface of the shaft (1). The first fastener groove (12) is corresponding to the first fastener flange (32) and recessed inwardly. The first fastener groove (12) is closely fastened with the first fastener flange (32).

Description

 Electric toothbrush head device

Technical field:

 The present invention relates to an electric toothbrush, and more particularly to an electric toothbrush head device. Background technique:

 The current electric toothbrush is composed of a motor, a rotating shaft, a toothbrush head, a tooth holder and the like. The lower end of the toothbrush head is provided with a hollow sleeve, which is directly sleeved and then rotated to the front end of the shaft, and is rotated and vibrated by the rotating shaft to drive the front end of the toothbrush to vibrate and sway. The purpose of automatic tooth cleaning is achieved, but such a socket has the following defects: the hollow sleeve at the lower end of the brush head is made of a hard plastic material, the shaft is made of a metal material, and the hollow sleeve and the shaft at the lower end of the brush head are rigid. Connection, long-term use will gradually wear the inner wall of the hollow sleeve, so that the socket of the toothbrush head and the rotating shaft is loose, thus affecting the comfort and service life of the brush head.

Disclosure of the Invention - An object of the present invention is to overcome the above-mentioned deficiencies of the prior art and to improve the above-described toothbrush head to provide an electric toothbrush head device which is resistant to wear and has a long service life.

In order to achieve the above object, the technical solution provided by the present invention is as follows: constructing an electric toothbrush head device, comprising a rotating shaft and a toothbrush head, wherein a brush plug is arranged between the rotating shaft and the brush head, the brush head The longitudinal section of the plug is substantially irregularly conical, and the brush head plug is provided with an inner cavity corresponding to the shape of the upper end of the rotating shaft, and the upper end of the inner cavity wall is provided with a flat position of the inner cavity for preventing noise from being shaken left and right by the brush head, and the inner cavity The upper end of the rotating shaft corresponding to the flat position of the cavity is provided with a flat position of the rotating shaft, and the flat position of the inner cavity is closely engaged with the flat position of the rotating shaft, and the lower end of the inner wall of the inner cavity is provided with a first buckle flange protruding toward an inner portion, wherein a first retaining groove recessed inwardly on a circumferential surface of the rotating shaft corresponding to the first buckle flange, the first buckle flange and the first buckle groove being tightly buckled Connecting the brush head plug tightly to the upper end of the rotating shaft; the lower end of the outer end surface of the brush head plug is provided with a second buckle flange protruding outward, and the toothbrush corresponding to the second flange The lower end of the inner wall of the brush head is provided with a second retaining groove recessed outwardly, and the second buckle flange is tightly fastened with the second retaining groove.

 The brush plug is made of a wear resistant material, which can reduce the friction and wear caused by the vibration of the hard metal shaft and the hard plastic material.

 The invention has the advantages that by providing a wear-resistant brush plug between the metal rotating shaft and the hard plastic toothbrush head, the long-standing wear of the electric toothbrush is solved, and the toothbrush head is connected with the upper end of the rotating shaft. The problem of looseness increases the service life and quality of the electric toothbrush.

BRIEF DESCRIPTION OF THE DRAWINGS:

 Figure 1 is a cross-sectional structural view of the present invention;

 Figure 2 is a partial enlarged view of Figure 1A.

detailed description:

Referring to FIG. 1 and FIG. 2, an electric toothbrush head device includes a rotating shaft 1 and a toothbrush head 2, and a brush plug 3 is disposed between the rotating shaft 1 and the toothbrush head 2, and the longitudinal direction of the brush head plug 3 The cross section is substantially irregularly conical, and the head plug 3 is provided with a cavity 30 corresponding to the shape of the upper end of the rotating shaft 1, and the upper end of the inner cavity wall is provided with a cavity flat position 31 for preventing noise from being shaken left and right by the brush head, and The upper end of the rotating shaft corresponding to the flat position of the inner cavity is provided with a rotating shaft flat position 11, the inner flat position 31 is tightly engaged with the rotating shaft flat position 11, and the lower end of the inner cavity wall is provided with a first buckle flange protruding toward the inner side. 32. A circumferential surface of the rotating shaft 1 corresponding to the first buckle flange is provided with an inwardly recessed first buckle groove 12, and the first buckle flange 32 is tightly coupled to the first buckle groove 12. The buckle is fastened, and the head plug 3 is tightly fastened to the upper end of the rotating shaft 1.

 The lower end of the outer end surface of the brush plug 3 is provided with a second protruding flange 34 protruding outwardly, and the inner wall of the lower end of the inner cavity 22 of the toothbrush head 2 corresponding to the second flange is provided with a second recessed outward The second groove flange 34 is tightly fastened to the second buckle groove 24 .

 The head plug 3 is made of wear-resistant material, which can reduce the friction and wear caused by the hard metal shaft 1 and the hard plastic toothbrush head 2, and prolong the service life of the electric toothbrush.

 The related technical content of the drive motor device of the present invention is described in detail in the applicant's invention patent 200620120759. 9, which will not be repeated here.

 The foregoing is merely illustrative of the principles and preferred embodiments of the invention. It is to be noted that a number of variations and modifications can be made by those skilled in the art without departing from the principles of the invention.

Claims

Claim An electric toothbrush head device, comprising a rotating shaft and a toothbrush head, wherein: a brush plug is arranged between the rotating shaft and the brush head, and the longitudinal section of the brush plug is substantially irregular a conical shape, the brush head plug is provided with a cavity corresponding to the shape of the upper end of the rotating shaft, the upper end of the inner cavity wall is provided with a flat position of the inner cavity, and the upper end of the rotating shaft corresponding to the flat position of the inner cavity is provided with a flat position of the rotating shaft, the inner portion The flat position of the cavity is tightly engaged with the flat position of the rotating shaft, and the lower end of the inner cavity wall is provided with a first buckle flange protruding toward an inner portion, and the circumferential surface of the rotating shaft corresponding to the first buckle flange is provided with a direction The first buckle groove recessed therein.  2. The electric toothbrush head device according to claim 1, wherein: the first buckle flange is tightly fastened to the first buckle groove.