Dental hand instrument and head housing therefor
In the case of a dental hand instrument having a grip sleeve and also a head housing arranged at the front end of the grip sleeve for receiving or holding a treatment instrument, the head housing has a substantially cylindrical hollow space which is connected by way of at least one connecting bore to a connection region pointing to the grip sleeve, wherein the connecting bore is coupled, at its end facing the grip sleeve, to a media line extending through the grip sleeve, and wherein the inner wall region of the head housing enclosing the hollow space has a recess into which the connecting bore opens.
1. A dental hand instrument, comprising:
a grip sleeve having a front end;
a head housing arranged at the front end of the grip sleeve, the head housing including a substantially cylindrical hollow space and an inner wall region enclosing the substantially hollow space, the head housing configured to receive or hold a treatment instrument;
a spray insert arranged in the substantially cylindrical hollow space having two circumferential annular incisions;
a connecting bore located in the head housing having a first end facing the grip sleeve,
wherein the substantially cylindrical hollow space is connected by way of the connecting bore to a connection region pointing to the grip sleeve, and
wherein the first end of the connecting bore is coupled to a media line extending through the grip sleeve; and
a sickle-shaped recess located within the inner wall region of the head housing and into which the connecting bore opens.
2. A dental hand instrument of claim 1 , wherein the connecting bore is aligned so as to be inclined with respect to a plane running perpendicularly to a longitudinal axis of the substantially cylindrical hollow space.
3. A dental hand instrument of claim 1 , further comprising an insert piece arranged in the substantially cylindrical hollow space of the head housing, wherein the insert piece has a media channel communicating with the sickle-shaped recess.
4. A dental hand instrument of claim 3 , wherein a height of the sickle-shaped recess corresponds to a height of the media channel.
5. A dental hand instrument of claim 1 , wherein the head housing has a plurality of connecting bores, wherein each of the plurality of connecting bores opens into the sickle-shaped recess formed on the inner wall region of the head housing.
6. A head housing for a dental hand instrument for receiving or holding a treatment instrument, the head housing comprising:
a substantially cylindrical interior hollow space connected by way of at least one connecting bore to a connection region, the connecting bore and the connecting region located through the head housing grip sleeve of the hand instrument,
a spray insert arranged in the substantially cylindrical hollow space having two circumferential annular incisions, and
an inner wall region enclosing the substantially cylindrical hollow space and comprising a sickle-shaped recess into which the at least one connecting bore opens.
7. The head housing of claim 6 , wherein the at least one connecting bore is aligned so as to be inclined with respect to a plane running perpendicularly to a longitudinal axis of the substantially cylindrical hollow space.
8. The head housing as claimed in claim 6 , further comprising an insert piece arranged in the substantially cylindrical hollow space of the head housing, wherein the insert piece has a media channel communicating with the sickle-shaped recess.
9. The head housing as claimed in claim 7 , wherein a height of the sickle-shaped recess corresponds to a height of the media channel.
10. The head housing of claim 6 , wherein the head housing has a plurality of connecting bores, wherein each of the plurality of connecting bores opens into the sickle-shaped recess formed on the inner wall region.