WO2007019741A1

WO2007019741A1 - A dental hygiene device

Info

Publication number: WO2007019741A1
Application number: PCT/CN2005/001645
Authority: WO
Inventors: Hui Tsu Chia; Philip Phung-I Ho
Original assignee: Meditech Internat Co Ltd; Hui Tsu Chia; Philip Phung-I Ho
Priority date: 2005-08-19
Filing date: 2005-10-08
Publication date: 2007-02-22
Also published as: CN200960177Y

Abstract

A dental hygiene device includes a housing, a driving axis, a driven axis and an abrasive tip. The abrasive tip sheaths and connects the driving axis detachably. And the dental hygiene device also includes at least one crankaxis. The driving axis has at least one axis aperture at the end surface near the driven axis, accordingly, and the driven axis has at least one axis aperture at the end surface near the driving axis. One end of the crankaxis is actively inserted into the aperture of the driving axis but not to the bottom of the aperture, and another end is actively inserted into the aperture of the driven axis but not to the bottom of the aperture. The crankaxis connects the driving axis with the driven axis, which are all located in the housing as a whole.

Description

Dental cleaning device

The present invention relates to a dental or dental hygiene appliance, and more particularly to a dental cleaning appliance.

Background technique

A dental cleaning appliance commonly used in dentistry is shown in FIG. 1 and includes a controller 1, a driving handle 2, a scaler 3 and a grinding head 4; a motor is mounted in the driving handle 2, and is connected to the controller 1, controlled by The device 1 controls the power supply and the action, etc.; the structure of the scaler 3 refers to FIG. 2 to FIG. 4, and the scaler 3 includes a housing 31, a transmission shaft 32 on which the transmission gear 34 is disposed, and a driven gear 35 thereon. The driven shaft 33, the transmission shaft 32 and the driven shaft 33 are disposed in the housing 31 and perpendicular to each other, and the transmission gear 34 meshes with the driven gear 35; the tooth cleaner 3 is detachably mounted on the driving handle 1, The drive shaft 32 is coupled to a shaft of a motor in the drive handle, and the drive shaft 32 is driven to rotate by a motor. The drive shaft 32 drives the driven shaft 33 through the meshed gear 34 and the gear 35. The grinding head 4 is mounted on the driven shaft 33. It is driven by the driven shaft 33.

When in use, the teether 3 is set on the driving handle 2, the power is turned on, the motor drives the grinding head to rotate at a high speed, the medical staff holds the driving handle, the grinding head is stained with a special abrasive paste, and the inlet cavity is extended to clean and polish the teeth. And generally. Discard the scaler 3 after use, and use it once to prevent cross-infection. The tooth cleaner 3 of such a structure, in order to erect the driven shaft 33, in particular the inner end portion of the driven shaft 33, the head of the outer casing 31 usually forms a convex portion 311, as shown in FIGS. 2 to 4. . In use, the scaler 3 extends into the entrance cavity, and the raised portion 311 makes the user feel less comfortable.

The tooth cleaner 3 of this structure, the transmission shaft 32 and the driven shaft 33 are driven by the meshing gear 34 and the gear 35, and the installation angle of the transmission shaft 32 and the driven shaft 33 is limited, and generally can only be designed to be 90 degrees. , also affects the convenience of operation and comfort. Moreover, when rotating at high speed, the gear is easy to slip, resulting in idling.

The tooth cleaner 3 of this structure has many parts, generally adopts plastic or metal injection, and has high cost and complicated assembly. In summary, the existing dental prosthetics need to be improved.

Summary of the invention

SUMMARY OF THE INVENTION It is an object of the present invention to provide a dental cleaner that utilizes a plurality of curved levers to ingeniously achieve connection and transmission.

In order to achieve the above object, the technical solution of the present invention is as follows: A tooth cleaner comprising a casing, a drive shaft, a driven shaft and a grinding head; the grinding head is detachably fitted on the driven shaft and coupled to each other; the tooth cleaner further comprises at least one curved rod At least one shaft hole is disposed on an end surface of the transmission shaft adjacent to the driven shaft, and at least one shaft hole is correspondingly disposed on an end surface of the driven shaft adjacent to the transmission shaft; one end of the curved rod is movably inserted therein The shaft of the drive shaft is not inserted into the hole bottom of the shaft hole, and the other end of the curved rod is movably inserted into the shaft of the driven shaft and is not inserted into the bottom of the shaft hole. The curved rod connects and interlocks the drive shaft and the driven shaft and is integrally mounted in the outer casing.

In a preferred embodiment of the present invention, the tooth cleaner, wherein the crank rod, the shaft hole on the drive shaft, and the shaft on the driven shaft are all three.

The tooth cleaner, wherein the curved rod is made of a metal material.

The transmission shaft and the driven shaft of the present invention are connected by a curved rod, and the inner end portion of the driven shaft is erected on the curved rod, and the head of the outer casing does not need to form a convex portion, and the head of the outer casing is kept smooth, when used. More comfortable.

The invention changes the angle of the overall extension direction of the curved rod, and can change the setting angle of the transmission shaft and the driven shaft, without being limited to 90 degrees.

The transmission shaft and the driven shaft of the present invention are connected by a curved rod, and when rotated at a high speed, they do not slip or idling.

The invention has few parts and no metal injection parts, and the processing difficulty is relatively low, the cost is low, and the assembly is relatively simple.

DRAWINGS

The technical solutions of the present invention and other advantageous effects will be apparent from the following detailed description of the preferred embodiments of the invention.

In the drawings,

Figure 1 is a perspective view of a conventional dental cleaning device;

2 is a perspective view of a dental scaler in a conventional dental cleaning device;

Figure 3 is a schematic exploded view of Figure 2;

Figure 4 is a schematic cross-sectional view of Figure 2;

Figure 5 is a perspective view of the tooth cleaner of the present invention;

Figure 6 is a partial schematic view of Figure 5;

Figure 7 is a schematic cross-sectional view of Figure 5;

Figure 8 is a perspective view of the crank gear transmission mechanism of the tooth cleaner of the present invention; Figure 9 is an exploded perspective view of Figure 8;

10 to 12 are schematic views showing the turning operation of the crank gear transmission mechanism of the tooth cleaner of the present invention, in which only one curved rod is drawn, and the rotational positions are respectively at 0, 90, and 180 degrees.

DETAILED DESCRIPTION OF THE INVENTION The detailed description and the accompanying drawings of the present invention are intended to Limit the invention.

As shown in FIG. 5 to FIG. 7, a tooth cleaner includes a casing 31, a transmission shaft 32, a driven shaft 33, three curved rods 36 made of steel wire, and a grinding head 4; the transmission shaft 32 is close to the driven shaft 33. There are three shaft holes 321 on the end surface, and three shaft holes 331 are correspondingly arranged on the end surface of the driven shaft 33 near the transmission shaft 32, see FIG. 9; the J-removing of the curved rod 36 is inserted into the shaft of the transmission shaft 32. The hole 321 is not inserted into the bottom of the hole of the shaft hole 321 , and the other end of the curved rod 36 is movably inserted into the shaft hole 331 of the driven shaft 33 and is not inserted into the bottom of the shaft hole 331 . The rod 36 connects and interlocks the drive shaft 32 and the driven shaft 33 and is integrally mounted in the outer casing 31; the grinding head 4 is detachably fitted on the driven shaft 33 and coupled in linkage.

As shown in Fig. 9, when the drive shaft 32 rotates, one end of one of the crank rods is turned from point A to point B, and the other end is turned from point C to point D, thereby driving the driven shaft to rotate, and the shaft hole 321 The depth of 331 is deeper than the insertion depth of the crank rod. Therefore, when the transmission shaft 32 and the driven shaft 33 rotate, the curved rod 3 is freely extended and retracted in the shaft holes 321 and 331, thereby making the rotation smooth, as shown in FIG. As shown in Fig. 12, when the curved lever is rotated by 0, 90, and 180 degrees, the freely stretched state of the curved lever.

As shown in Fig. 10, when both the transmission shaft and the driven shaft are at the 0 degree position, the curved rods 36 are respectively inserted into the shaft holes 321 and 331 as shown in the figure.

As shown in Fig. 11, when both the transmission shaft and the driven shaft are rotated to the 90 degree position, the curved rods 36 are respectively inserted into the deeper portions of the shaft holes 321 and 331 as shown in the figure.

As shown in Fig. 12, when both the transmission shaft and the driven shaft are rotated to the position of 180 degrees, the curved rods 36 are inserted into the almost deepest portions of the shaft holes 321 and 331, respectively, as shown in the figure.

When the drive shaft 32 and the driven shaft 33 are continuously rotated, the depth of the curved shafts 321 and 331 is different depending on the curvature of the corners of the curved lever 36. Since the depth of the shaft hole is larger than the limit point at which the crank rod extends, the crank rod can flexibly flex and retract while being rotated. It is apparent from the technical knowledge that the invention can be implemented by other embodiments without departing from the spirit or essential characteristics thereof. Therefore, the above-disclosed embodiments are merely illustrative and not exclusive in all respects. All changes which are within the scope of the invention or equivalent to the scope of the invention are encompassed by the invention.

Claims

Claim

A tooth cleaner comprising a housing, a drive shaft, a driven shaft and a grinding head; the grinding head is detachably fitted on the driven shaft and coupled to the linkage, wherein: the tooth cleaner is further Including at least one curved rod; the transmission shaft is adjacent to the end surface of the driven shaft 3b: having at least one shaft hole, and the driven shaft is correspondingly provided with at least one shaft hole on the end surface of the transmission shaft; the curved rod One end of the crankshaft is inserted into the shaft hole of the drive shaft and is not inserted into the bottom of the shaft hole, and the other end of the crank rod is movably inserted into the shaft hole of the driven shaft and is not inserted into the hole. Hole bottom of the shaft hole The crank rod connects and interlocks the drive shaft and the driven shaft and is integrally mounted in the outer casing.

2. A dental scaler according to claim 1, wherein the crank rod, the shaft hole on the drive shaft and the shaft hole on the driven shaft are three.

A tooth cleaner according to claim 1, wherein said curved rod is made of a metal material.