Dental handpiece with switching valve for fluid lines
a technology of fluid line and handpiece, which is applied in the field of dental handpieces with fluid lines, can solve the problems of not being able to switch off the air line of the chip, and not being able to inject only water,
Inactive Publication Date: 2012-11-29
NAKANISHI INC
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- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
The present invention provides a dental handpiece that can selectively inject water and chip air as desired. The handpiece has a switching valve for fluid lines, with a drive section and a detachable handpiece body. The handpiece body has a water line and a chip air line, with a valve in the middle that can selectively allow or prevent communication between the two lines. The valve can be rotated to different positions to control the communication. The handpiece also has a valve seat hole and a stopper that engages with a guide groove to position the valve in the first or second position. The technical effect of this invention is that it allows dental professionals to have a handpiece that can selectively inject water and chip air, making the dental procedure more efficient and effective.
Problems solved by technology
It is not possible to switch off the chip air line to stop chip air, while the water line is switched on to allow passage of water only.
Thus even if a user of the handpiece wants to use water only depending on the dental procedure, it is not possible to inject only water through the holes 37 in the head section 36 while chip air is stopped.
Method used
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[0026]The present invention will now be explained in detail with reference to the attached drawings. Incidentally, in the embodiment of the dental handpiece shown in FIGS. 1 to 6, the drive section may be a conventional one and thus is not shown in the drawings. When the drive section is referred to in the following detailed description of the invention, reference is made to FIG. 7 showing a drive section of a conventional dental handpiece.
[0027]Referring to FIGS. 1 and 2(a), a dental handpiece P according to the present invention has a drive section 1 (FIG. 7) and a handpiece body 2. The drive section 1 has an insert 11 axially projecting in the distal part of the drive section 1, and the handpiece body 2 has an axial bore 20 extending axially and opened in the proximal end face. The drive section 1 is detachably coupled to the handpiece body 2 by inserting the insert 11 into the axial bore 20.
[0028]The drive section 1 contains a water line extending therein for transferring water ...
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Disclosed is a dental handpiece wherein the chip air line is selectively switched to the ON-state for using both water and chip air, and to the OFF-state for using only water. The dental handpiece has a switching valve provided between the circumferential chip air channel and the chip air line in the handpiece body for selectively allowing and preventing communication therebetween, wherein opening of the valve switches the communication to the ON-state in which chip air is allowed to pass from the circumferential chip air channel into the chip air line, whereas closing of the valve switches the communication to an OFF-state in which chip air is prevented from passing from the circumferential chip air channel into the chip air line.
Description
FIELD OF ART[0001]The present invention relates to a dental handpiece having fluid lines, in particular, a water spray dental handpiece comprised of a handpiece body and a drive section detachably connected to the handpiece body, wherein, by connecting the drive section to the handpiece body, water and chip air lines in the drive section are connected to the corresponding water and chip air lines in the handpiece body.BACKGROUND ART[0002]Water spray dental handpieces are conventionally known, with which a dentist may spray water through the tip of the head section of the dental handpiece for cleaning the treatment site or the like. A dental handpiece of this type is known from, for example, JP-3103624-U, and is shown partially in FIGS. 7 and 8 of the attached drawings. The handpiece has a drive section 1 and a handpiece body 3. The drive section 1 has an insert 11 axially projecting in the distal part of the drive section 1, and the handpiece body 3 has an axial bore 30 extending ax...
Claims
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IPC IPC(8): A61C17/02
CPCA61C1/0061A61C17/0217A61C17/0202A61C1/0007A61C1/08
Inventor KIMURA, TAKAOMIZUNUMA, MASANORIYOKOCHI, KEITA
Owner NAKANISHI INC