JP2012095698A - Dust collector for dental use - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dust collector for dental use, which easily cleans and exchanges a filter.SOLUTION: The dust collector for dental use includes: a base 4 for placing the both hands of a worker; a dust suction port unit 8 arranged at the front end of the base 4 and having a dust suction port 8a to be sucked from an external part; a removable filter unit 10 for removing dust from air A passing the dust suction port 8a; and a cover 6 arranged to be turnable between a working position and a filter exchange position. The cover 6 covers the upper front part of the base 4 at the working position to form an air flow passage to the dust suction port 8a with the base 4, and also holds the filter unit 10 to be inseparable. The cover 6 releases the holding of the filter unit 10 at the filter exchange position to allow the filter unit 10 to be removable.

Description

  The present invention relates to a dental dust collector used for collecting and discharging abrasive powder and cutting waste so as not to scatter when a workpiece such as a denture is manually polished or cut.

  A dentist or dental technician uses a tool such as an air grinder (called a handpiece) to grind or cut a workpiece such as a tooth profile model or a cast product. Waste is generated. In order to perform work while preventing such scattering of abrasive powder and cutting waste, a dental dust collector provided with a dust collection port in which a suction airflow is generated is used. As such a dental dust collector, a small first dental collector which covers only the upper part of the trapezoidal base with a cover and sucks it through an exhaust hose connected to a dust suction pipe provided at the front end of the base. There is a duster. This type is mainly used by dental technicians to work on small items such as dentures, and a filter is mounted in the dust inlet pipe. On the other hand, there is a large second type in which the upper part of the entire base is covered with a cover and both hands are inserted into the cover from both sides of the cover (Patent Document 1). Since this second type is assumed to be used on a work table, it is slightly larger, and a filter is attached to the front part of the inner space of the cover.

Japanese Patent No. 3958951

  However, in the first type, when cleaning or replacing the filter installed in the dust suction pipe, remove the exhaust hose, remove the dust suction pipe, and push the filter out of the dust suction pipe by hand. It needs to be removed and takes time and effort. In the second type as well, it is necessary to put a hand into the cover from the side of the cover and remove the filter in a narrow space in the cover, and it still takes time to clean and replace the filter.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a dental dust collector that can be easily cleaned and replaced, and can be easily used beside a patient.

  In order to achieve the above object, a dental dust collector according to the present invention includes a base on which an operator's hands are placed, a dust inlet unit provided at the front end of the base and having a dust inlet sucked from the outside. A detachable filter unit for removing dust from the air passing through the dust suction port, and a cover rotatably provided at a work position and a filter replacement position, the cover being in front of the base at the work position. An air flow path to the dust suction port is formed between the upper portion of the filter unit and the base, and the filter unit is held in a non-detachable manner, and the holding of the filter unit is released at the filter replacement position. It is configured to be detachable.

  According to this configuration, since the filter unit can be attached and detached by rotating the cover and switching to the filter replacement position, the filter unit can be easily cleaned and replaced. In addition, since the cover is small enough to cover the upper part of the front part of the base, the entire dust collector becomes small.

  In the present invention, it is preferable to further include holding means for holding the cover on the base. According to this configuration, since the cover is stably held on the base by the holding means, the cutting operation can be smoothly performed at the operation position.

  When the holding means is provided, the holding means preferably has a holding projection provided on one of the front end portion of the cover and the base, and a holding hole provided on the other side into which the holding projection is fitted. . According to this configuration, the cover can be held on the work table with a simple structure.

  In the present invention, it is preferable that an engagement groove for engaging the filter unit disposed in contact with the rear end edge of the dust suction unit is formed in the base. According to this configuration, the position of the filter unit is regulated by the engagement groove and the rear end edge of the dust suction port unit, so that the filter unit is stably supported.

  When the engagement groove is formed, the front end of the cover is provided with a pressing portion that presses the filter unit engaged with the engagement groove against the dust inlet unit to prevent detachment from the base. It is preferable. According to this configuration, separation of the filter unit is prevented with a simple structure, and stable support of the filter unit is achieved.

  According to the dental dust collector of the present invention, since the filter unit can be attached and detached by rotating the cover and switching to the filter replacement position, the filter unit can be easily cleaned and replaced. .

It is a side view which shows the dental dust collector which concerns on one Embodiment of this invention. It is a top view which shows the base of the dental dust collector. It is a longitudinal cross-sectional view which shows the base of the dental dust collector. It is a rear view which shows the base. It is the VV sectional view taken on the line of FIG. FIG. 6 is a sectional view taken along line VI-VI in FIG. 2. It is a rear view which shows the cover of the dental dust collector. It is a front view which shows the cover of the dental dust collector. It is a bottom view which shows the cover of the dental dust collector. It is a front view which shows the filter unit of the dental dust collector. It is a side view which shows the state which made the cover the filter replacement position in the dental dust collector.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, a dental dust collector 2 according to an embodiment of the present invention covers a base 4 on which both hands of an operator are placed, a front half of the base 4, and is rotatably supported by the base 4. Cover 6. Both the base 4 and the cover 6 are made of resin.

  A cylindrical dust suction port unit 8 protruding forward is provided at the front end of the base 4. A dust suction port 8a, which is an opening at the front end of the dust suction port unit 8, is connected to an exhaust device (not shown) such as a suction pump via an exhaust hose (not shown), and is sucked from the outside. In this embodiment, the dust inlet unit 8 is integrally formed with the base 4, but may be a separate body. A detachable filter unit 10 is disposed behind the dust inlet unit 8 in contact with the rear edge of the dust inlet unit 8 to remove dust from the air A passing through the dust inlet 8a.

  The base 4 forms the bottom wall of the work space SP. As shown in FIG. 2, the base 4 has a shape that is long in the front-rear direction and wide in the rear direction in a plan view. On the other hand, it has a symmetrical shape. In the base 4, an introduction groove 12 extending from the rear part to the dust inlet unit 8 is formed on the upper surface, and both side ends of the introduction groove 12 are indicated by a two-dot chain line. As shown in FIG. 3, the bottom surface of the introduction groove 12 is a rear part 12 a that is smoothly inclined downward toward the front, and is substantially horizontal from the lowermost part of the rear part 12 a to the dust inlet unit 8, and slightly upward in the present embodiment. And a main portion 12b extending in an inclined manner. As shown in FIG. 2, the main portion 12 b of the introduction groove 12 extends while narrowing the width toward the front so that the front end portion substantially matches the width of the dust inlet unit 8. As shown in FIG. 1, recessed portions 14 a and 14 b that are smoothly recessed downward are formed between the center portion in the front-rear direction and the rear end portion of the shelf portion 14 that forms the periphery of the introduction groove 12.

  First, the configuration of the introduction groove 12 will be described in detail with reference to FIGS. 4 is a rear view of the base 4, FIG. 5 is a cross-sectional view taken along the line V-V in FIG. 2, and FIG. 6 is a cross-sectional view taken along the line VI-VI in FIG. As shown in FIG. 4, the bottom surface of the introduction groove 12 is set at the highest position at the rear end of the base 4, specifically, at a position higher than the lower end of the introduction port 8a. The rear end of the introduction groove 12 constitutes an air intake 13.

  FIG. 5 is a cross-sectional view of the most recessed portion of the recessed portions 14a and 14b. In the rear portion 12a of the introduction groove 12, as a result of the shelf 14 being lowered, the depth of the introduction groove 12 is the shallowest, while the lateral width W of the introduction groove 12 is the largest, The vicinity of the portion in the introduction groove 12 forms a work space SP.

  FIG. 6 is a cross-sectional view of the main portion 12b of the introduction groove 12, specifically, a portion in front of the recessed portions 14a and 14b. In the main portion 12 b of the introduction groove 12, the shelf portion 14 is high and the introduction groove 12 is deepest. On the other hand, the lateral width W of the introduction groove 12 becomes narrower toward the dust inlet unit 8. To go. An air flow path 16 (FIG. 1) is formed by the main portion 12 b of the introduction groove 12 and the arc-shaped cover 6 that covers the front portion of the base 4.

  As shown in FIG. 2, a pair of left and right support portions 18 and 18 that rotatably support the cover 6 are provided in the middle portion of the base 4 in the front-rear direction, specifically, in the vicinity of the recessed portions 14 a and 14 b. It is integrally formed. As shown in FIG. 6, each support portion 18 includes a protrusion 18 a that protrudes upward, and a support groove 18 b that is long in the vertical direction and is provided inside the protrusion 18 a.

  As shown in FIGS. 2 and 3, an engagement groove 20 for engaging the filter unit 10 is formed at the front end of the base 4. The engagement groove 20 of the present embodiment is formed inside the shelf portion 14 of the base 4 and is constituted by a slit extending in the left-right direction and the up-down direction perpendicular to the center line C. Further, a holding hole 22 is formed behind the engaging groove 20 in the shelf 14 of the base 4.

  As shown in FIG. 7, which is a rear view of the cover 6, the cover 6 has a shape in which an upper wall 6 a that forms an upper portion and side walls 6 b and 6 b that form left and right side portions are integrally formed. It has a semicircular arc shape with an open rear part. As shown in FIG. 1, the upper wall 6 a is inclined forward and the rear ends 24 of the left and right side walls 6 b, 6 b advance so as to protrude rearward as they move upward, and the rear edge of the upper wall 6 a It continues to 6aa. Thereby, it is suppressing that the powder and waste which arise at the time of work are scattered upwards and sideways. The lower edge 6c of the cover 6, that is, the lower edge of the side wall 6b is on a horizontal plane, and can be brought into close contact with the upper surface of the shelf 14 of the base 4 in FIG.

  A pair of pivot shafts 26, 26 made of protrusions protruding outward are integrally formed at the rear end portions of the lower portions of the side walls 6b, 6b in FIG. By engaging the pivot shaft 26 with the support groove 18b of the support portion 18 in FIG. 6, the cover 6 is rotatably supported by the base 4, and as shown in FIG. By rotating 6 in the vertical direction, the cover 6 is switched between a working position (a position indicated by a solid line) and a filter replacement position (a position indicated by a two-dot chain line).

  As shown in FIG. 8, which is a front view of the cover 6, a pair of left and right holding protrusions 28, 28 protruding downward are formed at the front end portion of the lower edge 6 c of the cover 6. In a state where the cover 6 is in the closed working position, the holding projection 28 is closely fitted into the holding hole 22 in FIG. 3, and the cover 6 is held by the base 4. That is, the holding means 30 for holding the cover 6 on the dental dust collector 2 is constituted by the holding projections 28 provided on the cover 6 of FIG. 1 and the holding holes 22 provided on the base 4.

  A semicircle provided at the rear end of the opening of the dust inlet unit 8 with the filter unit 10 engaged with the engagement groove 20 (FIG. 3) at the front end of the cover 6 in FIG. A pressing portion 32 that presses against the flange 8b is provided. As shown in FIG. 8, the pressing portion 32 is formed at the front end of the cover 6 and is integrally formed so as to extend outward at both ends of the semicircular surface 32a. Tab surfaces 32b and 32b.

  As shown in FIG. 9, which is a bottom view, the cover 6 is widened toward the rear, and as shown by a two-dot chain line in FIG. The lower edge 6c of the cover 6 is in intimate contact with the upper surface of the shelf 14 and extends in parallel with the both side edges of the base 4 on the inner side in the left-right direction from the edge. Almost completely covered.

  As shown in FIG. 10, the filter unit 10 includes a mesh-like filter material 34 and a frame 36 that supports the outer periphery of the filter material 34, and engaging pieces 38 provided on the left and right of the horizontally extending frame 36 are The base 4 is supported by engaging with an engaging groove 20 provided in the shelf 14 of the base 4. The filter material 34 has a circular shape that substantially matches the opening of the dust inlet unit 8 (FIG. 4), and the portion 36a above the engagement piece 38 in the frame 36 is wider than the lower portion 36b. Yes.

  As shown in FIG. 1, the cover 6 covers the upper part of the front part of the base 4 at the working position by the upper wall 6a and the left and right side walls 6b, 6b, specifically, the introduction groove 12. The air passage 16 to the dust suction port 8a is formed between the main portion 12b and the wide upper portion 36a of the filter unit 10 is held by the pressing portion 32 so as not to be detached.

  Next, a method of using the dental dust collector 2 and its operation will be described. First, in a state where the cover portion 6 is in the working position of FIG. 1, an exhaust device (not shown) is driven so that an intake force acts on the dust inlet unit 8. In this state, as shown in FIG. 2, the operator holds the work WP such as a denture and the tool T such as a small grinder with both hands H in the work space SP of the base 4. Polish or cut. At this time, by placing the hand H on the left and right recessed portions 14a, 14b in FIG. 2, the position of the hand H is stabilized, and the work becomes easy.

  In the above-described working state, an air passage along the rear portion 12a of the introduction groove 12 is formed between both hands H of the worker in the work space SP with the both hands H as guide walls on both sides. This air passage is connected to the air flow path 16 constituted by the main portion 12 b of the introduction groove 12 and the cover 6, and the dust suction port unit 8 is located on the front side of the air flow path 16. The air flow A generated by the suction force acting on the dust inlet unit 8 passes from the air intake port 13 between the operator's hands and through the rear portion 12a of the introduction groove 12 regardless of the movement of the operator's finger during the operation. Then, it further flows along a straight path that reaches the dust inlet unit 8 via the air flow path 16.

  Since the upper wall 6a of the cover 6 in FIG. 1 is inclined downward as it advances forward, and as shown in FIG. 2, the width becomes narrower as it advances forward, that is, the passage area of the air flow path 16 is forward. Since the air flow A becomes smaller as it travels, the air flow A is greatly squeezed toward the dust inlet unit 8 and flows at a large flow velocity. And since the back of the cover 6 is open | released, the location where air stagnates on the inner side behind the cover 6 is lost. Therefore, all the powder and debris generated by the work are efficiently and effectively discharged from the dust inlet unit 8 and are not scattered outside. Although the back of the cover 6 is open, air flows without stagnation at a large flow rate in the introduction groove 12, so that dust or dirt is generated from the open part of the back of the cover 2, the rear end 24, and the recessed portions 14 a and 14 b of the base 4. Waste does not leak to the outside.

  Furthermore, even if the workpiece WP being processed is accidentally dropped from the operator's hand H, the workpiece WP is prevented from being sucked into the dust inlet unit 8 by the filter unit 10 of FIG. Moreover, since relatively large cutting waste is removed by the filter unit 10, the dust suction port unit 8 is prevented from being clogged.

  Next, cleaning and replacement of the filter unit 10 will be described. In a state where the exhaust device (not shown) is stopped, as shown in FIG. 11, the rear portion of the cover portion 6 is manually pushed down in the direction indicated by the arrow P and the cover 6 is rotated to switch to the filter replacement position. . Subsequently, the filter unit 10 is pulled upward and removed from the engaging groove 20 (FIG. 2) of the base 4.

  The filter unit 10 after cleaning or replacement is engaged with the engaging groove 38 of the base 4 in the engagement piece 38 shown in FIG. 10, and the lower end of the lower portion 36 b of the frame 36 of the filter unit 10 is the introduction groove. It is moved downward until it comes into contact with the bottom surface of FIG. In this state, in the filter unit 10, a part below the center of the circular filter material 34 enters the base 4, and an upper part projects from the base 4.

  Subsequently, the cover 6 in FIG. 1 is rotated downward (in the direction opposite to P in FIG. 11) so that the holding projection 28 of the cover 6 is fitted into the holding hole 22 of the base 4, and the working position indicated by the solid line Switch to. Since the holding projection 28 is fitted into the holding hole 22 in a tight state, the cover 6 is stably held at the working position. At this time, the upper part of the filter unit 10 protruding from the base 4 is pressed against the rear end of the dust inlet unit 8 by the pressing portion 32 of the cover 6. Specifically, the upper portion 36a of the frame 36 of the filter unit 10 of FIG. 10 is pressed by the semicircular surface 32a of the pressing portion 32 of FIG. 8, and the protruding portion of the engagement piece 38 of the filter unit 10 of FIG. (Upper half part) is pressed against the tab surfaces 32b and 32b of the pressing part 32 of FIG. Thereby, detachment | leave of the filter unit 10 at the time of work is prevented.

  In the above configuration, as shown in FIG. 11, the filter unit 10 can be attached and detached by rotating the cover 6 and switching to the filter replacement position. Therefore, the filter unit 10 can be easily cleaned and replaced. Can do. In addition, since the cover 6 is small enough to cover the upper portion of the front portion of the base 4, the entire dust collector 2 becomes small.

  Further, in the working position shown in FIG. 1, the cover 6 is stabilized to the base 4 by fitting the holding projections 28 provided at the front end portion of the cover 6 into the holding holes 22 provided at the front end portion of the base 4. Therefore, the cutting operation can be smoothly performed at the operation position.

  Further, since the engagement groove 20 for engaging the filter unit 10 is formed in the base 4, the position of the filter unit 10 is regulated by the engagement groove 20 and the rear end edge of the dust inlet unit 8, and the filter The unit 10 is stably supported.

  In addition, since a pressing portion 32 is provided at the front end of the cover 6 to press the filter unit 10 against the dust suction port unit 8 at the working position and prevent the filter unit 10 from being detached from the base 4, the filter unit 10 can be easily operated with a simple structure. It can be prevented from leaving.

  As described above, the preferred embodiments of the present invention have been described with reference to the drawings, but various additions, modifications, or deletions can be made without departing from the spirit of the present invention. For example, in the above embodiment, the holding projection 28 is provided at the front end portion of the cover 6 and the holding hole 22 is provided at the front portion of the base 4, but the holding projection is provided at the front portion of the base 4 and the front end portion of the cover 6 is provided. You may provide a holding hole in. Therefore, such a thing is also included in the scope of the present invention.

2 Dental dust collector 4 Base 6 Cover 8 Dust inlet unit 8a Dust inlet 10 Filter unit 16 Air flow path 18b Holding hole 20 Engaging groove 22 Holding hole 28 Holding protrusion 30 Holding means 32 Pressing part SP Working space

Claims (5)

A base 4 on which both hands of the operator are placed;
A dust suction port unit 8 having a dust suction port 8a provided at the four front end portions of the base and sucked from the outside;
A detachable filter unit 10 for removing dust from the air passing through the dust suction port 8a;
A cover 6 rotatably provided at a work position and a filter replacement position;
The cover 6 covers the upper part of the front part of the base 4 at the working position and forms an air flow path to the dust suction port 8a between the cover 4 and the filter unit 10 so as not to be detached. A dental dust collector that allows the filter unit 10 to be attached and detached by releasing the holding of the filter unit 10 at the filter replacement position.   The dental dust collector according to claim 1, further comprising holding means 30 for holding the cover 6 on the base 4.   3. The holding means 30 according to claim 2, wherein the holding means 30 is provided with a holding projection 28 provided on one of the front end portion of the cover 6 and the base 4 and a holding hole 22 provided on the other side in which the holding projection 28 is fitted. And a dental dust collector.   4. The dental dust collecting unit according to claim 1, wherein the base 4 is formed with an engagement groove 20 for engaging the filter unit 10 disposed in contact with the rear end edge of the dust suction port unit 8. vessel.   5. The pressing portion 32 according to claim 4, wherein the front end of the cover 6 is provided with a pressing portion 32 that presses the filter unit 10 engaged with the engagement groove 20 against the dust suction port unit 8 to prevent detachment from the base 4. Dental dust collector.

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