JP2012080974A - Dental suction device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dental suction device which is remarkably compact and lightweight and is easily operated in comparison with conventional suction devices because, in suction mechanisms of the conventional dental suction devices, instruments are large and heavy for application using a large suction amount and there is a problem in suction and operation of liquid in an oral cavity.SOLUTION: A ball valve is disposed in a valve housing part of a dental suction device body. A slide switch slid forward and backward with the finger to open/close a fluid passage of the ball valve is disposed on the surface of the ball valve housing part. An insert-fitting part for various suction tubes is disposed at the front end of the housing part, and a suction tube insert-fitting part whose deflection angle can be set is disposed at the rear end of the housing part.

Description

  The present invention relates to an intraoral suction device in dental practice.

  Conventionally, a dental suction apparatus has a fluid passage opening / closing means, but the opening / closing mechanism has no fixed form.

JP 2006-102486 A Japanese Patent Laid-Open No. 05-095997

However, in the suction mechanism of a conventional dental suction device, the suction amount of fluid is proportional to the size of the instrument, and the instrument becomes large and heavy in applications where the suction amount is large. There was a problem.
The present invention provides a dental suction device that is much smaller and lighter and easier to operate than conventional suction devices when the suction amount is the same as that of the conventional suction device.

In view of the above, the present inventors have solved the problem by the following means as a result of intensive experimental research.
(1) A hand-held dental suction device for sucking fluid in the oral cavity, wherein a ball valve is adopted as a fluid on-off valve inside the suction device body.
(2) The slide switch for opening and closing the ball valve that is slid back and forth with fingers for opening and closing the ball valve is disposed on the surface of the hand-held portion of the dental suction apparatus main body. Dental suction device.
(3) The preceding item (1) or characterized in that a connecting mechanism provided with a rotatable deflection angle is provided at the connecting portion between the rear portion of the dental suction device main body and the suction tube detachably connected thereto. The dental suction apparatus according to (2).
(4) A ball-shaped valve body provided with a large through-hole penetrating perpendicularly to the axis of the short axis protruding from a part of the surface of the sphere, and the short axis on the tube wall A tubular body that has a through-hole that can be rotatably inserted and can accommodate the ball-shaped valve body, and a rotational straight line that converts the rotational movement direction of the short axis into a linear movement direction along the axis of the tubular body A dental suction apparatus according to any one of the preceding items (1) to (3), comprising a motion conversion mechanism.
(5) A rotating linear motion conversion mechanism is configured such that a long groove formed in the radial direction from the center of the upper end surface of the short axis of the ball-shaped valve body, a rod that is loosely fitted perpendicularly to the long groove, A slit provided on the tube for sliding in the linear direction through the body of the rod, and in a linear direction located on the upper surface of the slit, with the base of the rod being fixed and a finger suspension on the back The dental suction apparatus according to any one of (1) to (4), wherein the dental suction apparatus includes a slidable slider.

According to the present invention, the following excellent effects can be exhibited.
1. According to the invention of claim 1,
In the dental suction device that sucks fluid in the oral cavity, since the ball valve is adopted as the valve body in the valve housing part of the dental suction device body,
The structure is simple, and it can be opened and closed by turning the valve body shaft by 90 degrees, and the operability is good.
The ball valve has the smallest volume compared to other valves with similar performance, and the diameter of the fluid passage hole can be increased, so that the flow rate can be extremely increased.
Furthermore, since there are no obstacles to the flow in the fluid passage hole, vortex and pulsation are hardly generated, and the suction characteristics are excellent.
Particularly, in a dental suction device, for example, a saliva ejector (saray ejector) with a small suction amount, it can be reduced in size and weight, so that the operability is excellent and the burden on the patient is small.

2. According to the invention of claim 2,
Because the slide switch that opens and closes the fluid passage by rotating the ball valve of the dental suction device body is provided on the surface of the ball valve storage part,
It can be opened and closed by sliding the slide switch back and forth with the tip of the gripped finger, and it is easy to operate and has an elegant appearance.
3. According to the invention of claim 3,
Since the connecting portion between the rear portion of the dental suction device main body and the suction tube detachably connected thereto is provided with a connecting mechanism provided with a rotatable deflection angle,
The suction tube and the valve housing part can be set at a desired angle, the setting to a required place in the oral cavity is easy, and the work efficiency at the time of treatment can be improved. In addition, since the angle at which the suction tube hangs is closer to the vertical, the practitioner is less likely to feel the weight of the suction tube and is less fatigued.

4. According to the invention of claim 4,
A ball-shaped valve body having a large through hole penetrating perpendicularly to the axis of the short axis projecting from a part of the surface of the sphere, and the short axis is freely rotatable on the tube wall A tube having a through-hole that can be inserted into the tube, and capable of accommodating the ball-shaped valve body, and a rotational linear motion conversion mechanism that converts the rotational motion direction of the short shaft into a linear motion direction along the axis of the tube So that
By sliding the slide switch back and forth, the valve body can be rotated, a small and lightweight suction device can be created, and the operation is easy.

5. According to the invention of claim 5,
A rotating linear motion conversion mechanism is provided on the upper end surface of the short axis of the ball-shaped valve body in a long groove cut from the center in the radial direction, a rod that is loosely fitted perpendicularly to the long groove, and a tubular body on the upper part of the long groove A slit for penetrating the body of the rod and sliding in a linear direction, and located on the upper surface of the slit, the base of the rod is fixed, and it can slide in a linear direction having a finger suspension on the back Because it consists of a slider,
Rotational linear motion conversion can be performed with high conversion efficiency inside the suction device body in conjunction with the slider.

The external appearance perspective view of a dental suction device. The external view of a dental suction device main body. The external appearance perspective view of a ball-shaped valve body storage part. The external perspective view of a slide switch. The external appearance perspective view of a ball-shaped valve body. The partially broken figure when a ball-shaped valve body is open with the assembly drawing which shows the inside of a main body. The partially broken figure when a ball-shaped valve body is closed with the assembly drawing which shows the inside of a main body. The principle figure of a ball-shaped valve body opening and closing operation. Supplementary explanatory drawing of FIG. The schematic diagram of a ball-shaped valve body holder. The schematic cross section which shows the fitting part of the slide groove | channel of a ball-shaped valve body, and the protrusion for slide switch slides. External view when setting a deflection angle at the rear end of the main body and inserting a suction tube into the joint. FIG. 13 is an external perspective view of FIG. 12. The longitudinal cross-sectional view of the conventional ball-shaped valve body accommodating part.

The best mode for carrying out the invention will be described in sequence below.
Conventionally, in other technical fields, a ball-shaped valve body is mainly used as a valve body for large-sized fluid opening / closing control.
An example is shown in the figure. FIG. 14 is a longitudinal sectional view of a conventional ball valve storage portion.
In the figure, reference numeral 30 denotes a ball valve storage portion, 31 a body, 32 a body cap, 33 a ball valve, 34 a ball seat, 35 a fluid passage, 36 a rotating shaft, and 37 an opening.
As shown in the figure, the ball-shaped valve element 33 is held by the body cap 32 and the ball seat 34 from the left and right, and the rotating shaft 36 is projected to the outside, and the opening is rotated by rotating the rotating shaft 90 degrees. 37 is opened and closed. Therefore, it has been difficult to reduce the size.

However, the present invention is devised to be suitable for a small-diameter dental suction device.
That is, in the present invention, as described above, the short rod that moves back and forth is fitted in the slide groove that is carved from the center of the circular shaft of the end surface of the short rotating shaft of the ball-shaped valve body toward the outer peripheral end. Since the linear motion is changed to a rotational motion by sliding in the groove and the ball-shaped valve body is rotated 90 degrees, the container to be held including the slide switch integrated above the storage container is extremely It is downsized.

FIG. 1 is an external perspective view of a dental suction apparatus according to the present invention.
In the figure, 1 is a dental suction device, 2 is a ball-shaped valve body storage part, 3 is a slide switch, 4 is a suction tube insertion part, 5 is a suction tube, 7 is a suction tube insertion part, 8 is a suction tube, Reference numeral 25 denotes a dental suction apparatus main body.
As shown in the figure, the dental suction device 1 is configured by inserting a suction tube 5 and a suction tube 8 in front of and behind a ball-shaped valve body storage portion 2 of a dental suction device body 25.
The practitioner grasps the vicinity of the ball-shaped valve body storage part 2 and slides the slide switch 3 back and forth with the tip of a finger to open and close.
The suction target of the dental suction device is dust generated when cutting or removing teeth or prosthesis, cooling spray water, saliva, blood, etc.
The suction tube 5 is a suction tube such as a dental suction device or a saliva ejector.

2A and 2B are external views of the dental suction apparatus main body, where FIG. 2A is a top view, FIG. 2B is a front view, FIG. 2C is a left side view, FIG. 2D is a right side view, and FIG. , (F) is a rear view, and (g) is a longitudinal sectional view.
In the figure, 9 indicates a ball-shaped valve body.
In FIG. 2, the slide switch 3 is slid forward and the fluid passage is in an open state.
Then, as shown in the longitudinal sectional view of (g), the ball-shaped valve element 9 is accommodated in the ball-shaped valve element accommodating portion 2.
Details will be described later with reference to component parts drawings and assembly drawings.

FIG. 3 is an external perspective view of the ball-shaped valve body storage portion.
In the figure, 10 is a cylindrical part having a step, 11 is a suction tube insertion part of the storage part, 12a and 12b are slits for slide switches, 13 is a suction pipe insertion part of the storage part, and 14 is for rotating the ball-shaped valve body. A slit is shown.
As shown in the figure, the ball-shaped valve body storage portion 2 of the dental suction device main body 25 is cylindrical, and slide switch slits 12a and 12b into which slide switch rods (21a and 21b) are fitted on both sides. And the ball-shaped valve body rotation slit 14 with which the ball-shaped valve body rotation rod (20a, 20b) fits is provided.

FIG. 4 is an external perspective view of the slide switch.
In the figure, 19 is a finger suspension, 20a and 20b are ball-shaped valve body rotation rods, and 21a and 21b are slide switch rods.
The slide switch 3 has a semi-cylindrical shape, and four slide switch rods 21a and 21b are provided at both lower ends thereof, and two ball-shaped valve body rotation rods 20a and 20b are provided at the lower end centers. It has been.
A finger suspension 19 for sliding the slide switch 3 with fingers is provided on the upper part of the semi-cylindrical shape of the slide switch 3.
Then, when the slide switch 3 is slid back and forth by the hand hook 19,
The rods 20a and 20b fitted in the slide groove (18) slide in the slide groove (18), and the ball-shaped valve body (9) rotates 90 degrees around the ball-shaped valve body short axis (16). To do.
The semi-cylindrical portion of the slide switch 3 is overlaid on the stepped cylindrical portion 10 of FIG. 3, and the slide switch slits 12a and 12b of the ball-shaped valve body of FIG. Slide switch rods 21a and 21b and ball-shaped valve body rotation rods 20a and 20b at the lower end center are fitted into the ball-shaped valve body rotation slit 14 into which the moving rods (20a and 20b) are fitted. Yes.

FIG. 5 is an external perspective view of the ball-shaped valve body.
In the figure, 15 is a fluid passage hole, 16 is a ball-shaped valve body short axis, 17 is a rotation shaft surface, and 18 is a slide groove.
As shown in the drawing, the ball-shaped valve body 9 is provided with a fluid passage hole 15 having a large diameter that is equal to the inner diameter of the ball-shaped valve body housing portion 2.
Further, a rotating shaft that is 90 degrees different from the fluid passage hole 15 is provided with a ball-shaped valve body short shaft 16 and a rotating shaft surface 17, and the ball of the slide switch 3 is provided on the rotating shaft surface 17. A slide groove 18 for opening and closing the fluid passage hole 15 by rotating the fluid passage hole 15 by 90 degrees by the rod-shaped valve body rotating rods 20a and 20b is directed toward the outer periphery with the center of the ball-shaped valve body short shaft 16 as the center. It is engraved.
The ball-shaped valve body 9 is disposed in the center of the ball-shaped valve body storage portion 2.

FIG. 6 is a partially cutaway view showing the inside of the main body when the ball-shaped valve body is opened.
In the figure, 19 is a finger suspension, and 23 is an outer wall of the ball-shaped valve body storage part.
As shown in the figure, the ball-shaped valve body 9 is held in the outer wall 23 of the ball-shaped valve body housing portion, and the slide switch 3 is slid to the suction tube 5 side by a hand hook 19.
The ball-shaped valve element rotating rods 20a and 20b (FIG. 4) are slid to the front suction pipe 5 side in the slide groove 18, and the ball-shaped valve element short shaft 16 has the fluid passage hole 15 as described above. The angle is an open state parallel to the inner diameter of the ball-shaped valve body storage portion 2.
Further, as shown in the figure, the rotation shaft surface 17 is in the outer wall 23 of the ball-shaped valve body storage portion and is not visible from the outside.
And the front-end | tip part of the suction pipe mounting part 4 (g figure of FIG. 2) with which the said ball-shaped valve body accommodating part 2 front is mounted | worn is shown in the fracture | rupture figure.

FIG. 7 is a partially cutaway view showing the inside of the main body when the ball-shaped valve body is closed.
In the figure, reference numeral 22 denotes a closed surface of the ball-shaped valve element.
The slide switch 3 is slid to the suction tube 8 side by a finger suspension 19, and the ball-shaped valve body rotation rods 20a and 20b slide in the slide groove 18 to the rear suction tube 8 side to form a ball shape. The valve body short shaft 16 rotates 90 degrees clockwise from the opened state.
In conjunction with this, the fluid passage 15 also rotates 90 degrees, the closing surface 22 of the ball-shaped valve body closes the fluid passage 15, and the fluid passage hole 15 is closed.
Further, as shown in the figure, the rotation shaft surface 17 is in the outer wall 23 of the ball-shaped valve body storage portion and is not visible from the outside.
The tip of the suction tube mounting portion 4 (g in FIG. 2) mounted on the inner side in front of the ball-shaped valve body storage portion 2 is shown in the cutaway view.

The operation in FIGS. 6 and 7 will be described in detail below with reference to the explanatory diagrams.
FIG. 8 is a principle view of the ball-shaped valve body opening / closing operation.
In the figure, 26 indicates the rotation angle of the ball-shaped valve element, and 27 indicates the linear movement distance of the rotation rod.
As shown in the figure, the ball-shaped valve element rotating rods 20b, (20a) are at the left end of the slide groove 18 on the upper surface of the short axis 16 of the ball-shaped valve element, and this state is referred to as opening of the ball-shaped valve element 9.
Next, when the ball-shaped valve body rotating rod 20b is linearly slid to the right, the ball-shaped valve body rotating rod 20b slides while pressing the right side surface of the slide groove 18, so that the ball-shaped valve body rotating rod is rotated. The rod 20b is near the center of the slide groove 18 (broken line),
Further, when the ball-shaped valve body rotation rod 20b is linearly slid to the right, the ball-shaped valve body rotation rod 20b becomes the right end of the slide groove 18 (broken line). Rotate 90 degrees. If the ball-shaped valve body 9 is closed at this time, the linear motion of the ball-shaped valve body rotating rod 20b can be changed to the rotational motion of the ball-shaped valve body 9.
The operation from closing to opening may be performed by moving the ball-shaped valve body rotation protrusion 20b in the opposite direction.
The rotation angle 26 of the ball-shaped valve body may be set to 90 degrees so that the linear movement distance 27 of the rotation protrusion is set to be 90 degrees.

FIG. 9 is a supplementary explanatory diagram of FIG.
FIG. 7 is a diagram illustrating the positional relationship between the ball-shaped valve body rotating rod 20b and the slide groove 18 that is not shown in the partially broken view when the ball-shaped valve body is closed in the assembly diagram showing the inside of the main body of FIG. It is explanatory drawing based on the principle of 8. FIG.
In the figure, a ball-shaped valve body rotation rod 20b and slide switch slide rods 21a and 21b (FIG. 4), and a ball-shaped valve body rotation slit 14 and slide switch slits 12a and 12b (FIG. 3) In the virtual diagram for explanation, the main body is omitted.

(A) The figure is an explanatory view when the ball-shaped valve element 9 is open.
The ball-shaped valve body rotation rod 20b penetrates the ball-shaped valve body rotation slit 14 and the tip thereof is fitted in the slide groove 18.
(B) The figure is an explanatory view when the ball-shaped valve body 9 is half open in the middle.
As for the positional relationship, the ball-shaped valve body rotating rod 20b is in the middle of the ball-shaped valve body rotating slit 14, and the slide groove 18 is at an angle of 45 degrees from the opening.
FIG. 4C is an explanatory view when the ball-shaped valve body 9 is closed. The positional relationship is that the ball-shaped valve body rotating rod 20b is at the right end of the ball-shaped valve body rotating slit, and the slide groove 18 is positioned. Is at an angle of 90 degrees from the opening.

And the example which hold | maintains the ball-shaped valve body 9 in the ball-shaped valve body storage part 23 is demonstrated with a schematic diagram.
FIG. 10 is a schematic view of a ball-shaped valve body holder.
In the figure, 41 is a holding cylinder in the rear half part that is fitted in the ball-shaped valve body storage part, 42 is a semicircular cut that contacts the front half of the shaft circumference engraved in the ball valve storage part, and 43 is ball-shaped Curved cut 42 'is in contact with the hemispherical front half surface carved in the valve body storage part, and 42' is a semicircular shape that abuts the rear half of the shaft circumference carved in the holding cylinder of the ball-like valve body rear half part. Incision 43 'indicates a curved incision that abuts against the surface of the latter half of the hemisphere carved in the holding cylinder.

The ball-shaped valve body 9 disposed in the center of the ball-shaped valve body storage portion 2 has a ball-shaped valve body storage portion 2 that holds the front half portion thereof and a holding cylinder 41 that supports the rear half portion of the ball-shaped valve body 9 projects in the center. Are held together.
Below, based on FIG. 10, an example is demonstrated.
In the figure, 29 indicates a fluid passage.
The outer diameter of the holding cylinder 41 is smaller than the inner diameter of the ball-shaped valve body storage portion 2.
First, the front half of the ball-shaped valve body 9 is inserted into the ball-shaped valve body housing portion 2 as shown by →.
Next, the holding cylinder 41 is moved in the ball-shaped valve body storage portion 2 as shown by → and inserted so as to hold the rear half of the ball-shaped valve body 9.
Further, the slide switch rod 21a is fitted in the slide groove 18 in the direction of the → mark, and this portion will be described with reference to FIG.

FIG. 11 is a schematic cross-sectional view showing a fitting portion between the slide groove of the ball-shaped valve body and the slide switch rod.
In the figure, 29 indicates a fluid passage.
The holding cylinder 41 is fitted in the cylinder of the ball-shaped valve body storage portion 2, and the ball-shaped valve element short shaft 16 and the slide groove 18 are in the slit 14 of FIG. A slide switch rod 21 a is fitted in the groove 18. (See Figure 9)

As shown in FIGS. 6 and 7, the volume of the ball-shaped valve body 9 is small and the diameter of the fluid passage hole 15 is the same as that of the ball-shaped valve body housing portion 2, so that suction is performed when the ball-shaped valve body 9 is opened. When closed, the fluid passage can be tightly closed by the closing surface 22 of the ball-shaped valve body.
The rotating mechanism of the ball-shaped valve element short shaft 16 by the slide of the slide switch 3 is also simple, and is light and small as a whole, and is easy to operate.

FIGS. 12A and 12B are external views when the suction tube is inserted into the declination setting / joint portion of the rear end of the main body. FIG. 12A is a front view, and FIG.
In the figure, 6 indicates a declination setting / joint portion, and 24 indicates a declination.
This figure is another example of a dental suction apparatus.
The practitioner turns the deflection angle setting / joint portion 6 to set the deflection angle 24 to a desired angle, grasps the vicinity of the ball-shaped valve body storage portion 2, and easily places the tip of the suction tube 5 at a desired site in the oral cavity. Can be approached.
FIG. 13 is an external perspective view of FIG.

1: Dental suction device 2: Ball-shaped valve body storage unit 3: Slide switch 4: Suction tube insertion unit 5: Suction tube 6: Declination setting / joint unit 7: Suction tube insertion unit 8: Suction tube 9: Ball-shaped valve body 10: Cylindrical portion 11 having a step 11: Suction tube insertion portion 12a, 12b of storage portion: Slide switch slit 13: Suction tube insertion portion 14 of storage portion: Ball-shaped valve body rotation slit 15: Fluid passage hole 16: Ball-shaped valve element short shaft 17: Rotating shaft surface 18: Slide groove 19: Finger suspension 20a, 20b: Ball-shaped valve element rotating rods 21a, 21b: Slide switch rod 22: Ball-shaped valve element 23: Outer wall 24 of the ball-shaped valve body housing part 24: Declination angle 25: Dental suction device body 26: Rotation angle of the ball-shaped valve body 27: Linear movement distance 28 of the rotating rod 28: Ball-shaped valve body holder 29: flow Passage 30; Ball valve storage 31: Body 32: Body cap 33: Ball valve 34: Ball seat 35: Fluid passage 36: Rotating shaft 37: Opening 41: The latter half fitted in the ball-shaped valve body storage Holding cylinder 42: Semicircular cut 42 'that contacts the front half of the shaft circumference engraved in the ball-shaped valve body storage section: Semicircular cut that contacts the rear half of the shaft circumference engraved in the holding cylinder 43: Curved cut in contact with hemispherical front half surface engraved in ball-shaped valve body storage part 43 ': Curved cut in contact with hemispherical latter half surface engraved in holding cylinder

Claims (5)

In a dental suction device that sucks fluid in the oral cavity,
A dental suction device characterized by employing a ball valve as a fluid on-off valve inside the suction device body.   2. The dental suction device according to claim 1, wherein a slide switch for opening and closing the ball valve that slides back and forth with fingers for opening and closing the ball valve is disposed on a surface of the hand-held portion of the dental suction device body. .   The connecting part of the back part of the dental suction device main body and the suction tube detachably connected thereto is provided with a connecting mechanism provided with a rotatable deflection angle. Dental suction device.   A ball-shaped valve body having a large through hole penetrating perpendicularly to the axis of the short axis projecting from a part of the surface of the sphere, and the short axis is freely rotatable on the tube wall A tube having a through-hole that can be inserted into the tube, and capable of accommodating the ball-shaped valve body, and a rotational linear motion conversion mechanism that converts the rotational motion direction of the short shaft into a linear motion direction along the axis of the tube The dental suction apparatus according to any one of claims 1 to 3, wherein the dental suction apparatus is provided.   A rotary linear motion conversion mechanism is formed by a long groove formed in a radial direction from the center of the upper end surface of the short axis of the ball-shaped valve body, a rod that is loosely fitted perpendicularly to the long groove, and a tubular body at the upper part of the long groove. A slit on the wall that slides in the linear direction through the body of the rod, and slides in the linear direction with the base of the rod fixed to the back and a finger suspension on the back The dental suction device according to any one of claims 1 to 4, wherein the dental suction device comprises a possible slider.