JP7444451B2 - Protector base plate, protector, and protector mounting structure - Google Patents

Description

Application of Article 30, Paragraph 2 of the Patent Act 1. Publication by posting on the website: Videos A to F of the invention will be published on the video posting site YouTube (May 14th to July 19th, 2020). 2. Publication by distribution: Prototypes of the invention were distributed to six locations (July 1st to July 31st, 2020). 3. Published by distribution: A catalog of the free arm attachment [Free Arm Shield] using the invention was distributed to 664 locations (October 16, 2020).

The present invention relates to a protector base plate, a protector, and a protector mounting structure placed between a worker who treats or treats an affected area and the affected area.

Patent Document 1 describes a protector (dust-proof wall in Patent Document 1) that is placed between a patient and a therapist in dental treatment or the like.
The protector described in Patent Document 1 is formed into a curved thin plate shape of transparent plastic, and is attached via a fixing device to the upper surface of a suction device (suction section) attached to the end of an arm.

Japanese Patent Application Publication No. 6-169940

For example, in dental and oral surgery treatments and procedures, there is a risk that substances (spattered objects) scattered from the affected area may adhere to workers who face the oral cavity of the affected area. In dental treatments and treatment, the flying objects are, for example, powders such as shavings and polishing powder, and body fluids such as blood and saliva.
The protector is placed between the oral cavity and the worker to prevent such debris from the oral cavity from being carried by the airflow and landing on the worker. In particular, the protector is attached to the suction section of the suction device, and the suction device sucks up the scattered objects together with the air in the space on the oral cavity side of the protector, thereby making it difficult for the scattered objects to adhere to the worker.

By the way, the protector described in Patent Document 1 has a curved thin plate shape and is attached to the upper surface of a suction section having a suction port.
Generally, the suction part is formed into a substantially cylindrical shape. Therefore, with the protector mounting structure described in Patent Document 1, it is difficult to obtain sufficient strength at the part where the protector is attached to the suction part, and it is difficult to attach a large protector, and it is difficult to stabilize the posture of the protector attached to the suction part. There is room for improvement in this respect.

Therefore, an object of the present invention is to provide a protector base plate, a protector, and a protector mounting structure that can be firmly and stably attached to a suction part.

In order to solve the above problems, the present invention has the following configuration and procedure.
1) A transparent approximately rectangular thin plate,
a first engaging portion that is a hole formed on a center line extending in one direction and capable of engaging with a tubular member;
a second engaging portion that is a flap formed on the center line and capable of engaging with an edge of the brim member;
a pair of slits cut halfway toward the first engaging portion from each of the pair of opposing sides across the center line;
This is a protector base plate with
2) In the one direction, when one side of the pair of slits is the base and the other side is the apron,
The protector blank plate according to item 1), wherein the first engaging part is located at the apron part, and the second engaging part is located at the base part.
3) having a pair of ruled line portions formed such that the edges of the pair of sides of the base can be bent by hand, respectively;
When the edges of the pair of sides and the apron part are folded to the same side, the edges of the pair of sides are engaged with the parts of the apron part on the side of the pair of sides, so that the edges of the pair of sides are locked. The protector blank plate according to item 2) is characterized in that a pair of locking portions are formed to maintain the side edges and the apron portion in a folded state.
4) Made of transparent thin plate,
a base extending in a flat or curved shape;
an apron portion bent from one edge of the base;
a first engaging portion formed as a hole that engages with a tubular member in the apron portion;
a second engaging portion that can be cut and raised at the base so as to engage with the flange of the tubular member;
It is a protector with
5) A protector mounting structure for attaching the protector to the suction part at the tip of the suction device,
The suction part is
a duct tip having an opening for sucking air;
a hood that is attached to the tip of the duct and has a tubular insertion portion that is inserted into the opening, and a base that surrounds the opening and increases in diameter toward the tip;
Equipped with
The protector is
Made of transparent thin plate,
a base extending in a flat or curved shape;
an apron portion bent from one edge of the base;
a first engaging part that can be engaged with the hood in the apron part;
a second engaging part that can be engaged with an edge of the hood at the base;
Equipped with
inserting and engaging the insertion portion or the base portion of the suction portion with the first engaging portion;
engaging the second engaging portion with an edge of the hood;
The protector mounting structure is characterized in that the protector is mounted on the suction section.

According to the present invention, it is possible to obtain the effect that it can be firmly and stably attached to the suction section.

FIG. 1 is a perspective view showing a state in which a protector 1, which is an example of a protector according to an embodiment of the present invention, is attached to a suction device 8. As shown in FIG. FIG. 2 is a plan view showing a protector blank plate 1S which is an example of the protector blank plate according to the embodiment of the present invention. FIG. 3 is a first diagram illustrating a procedure for forming the protector 1 from the protector blank 1S. FIG. 4 is a second diagram illustrating the procedure for forming the protector 1 from the protector blank 1S. FIG. 5 is an assembly diagram illustrating a procedure for attaching the protector 1 to the suction section 8K. FIG. 6 is a longitudinal sectional view showing a state in which the protector 1 is attached to the suction section 8K. FIG. 7 is a partial plan view showing the attachment portion 33A of the protector blank 1S. FIG. 8 is a perspective view showing a state in which the protector 1A having the attachment portion 33A is attached to the hood 94. FIG. 9 is a partial sectional view of the first usage mode of the protector 1 viewed from the left side. FIG. 10 is a diagram of the first usage mode of the protector 1 viewed from the head H14 side of the patient H2. FIG. 11 is a partial cross-sectional view of the second usage mode of the protector 1 viewed from the left side. FIG. 12 is a diagram of the second usage mode of the protector 1 viewed from the side of the head H14 of the patient H2.

A protector according to an embodiment of the present invention will be explained using a protector 1 of an example.

(Example)
FIG. 1 is a perspective view showing a state in which the protector 1 is attached to the suction device 8.
The suction device 8 is an extraoral suction used in dental treatment and treatment. The suction device 8 sucks air near the oral cavity H12, which is the affected area of the patient H1 seated on the patient chair H2, as well as fine particles scattered from the affected area. The scattered matter is, for example, powder such as shavings or polishing powder, or body fluid such as blood or saliva. The scattered substances also include viruses or bacteria that are expelled with exhaled breath when the patient H1 is infected with a virus or bacteria.

The suction device 8 includes a main body part 81, an arm part 82 whose one end side is connected to the main body part 81 and has a ventilation duct passed through it, and a suction part 8K which is connected to the other end side of the arm part 82 and communicates with the ventilation duct. has.
The suction section 8K includes a duct tip 83 having a duct opening 83a serving as an opening of the ventilation duct, and a hood 84 attached to the duct tip 83 with a collar surrounding the duct opening 83a. has been done.

The arm portion 82 has a plurality of hinges 82a, 82b, etc., and can set the posture of the suction portion 8K with six degrees of freedom.
The main body part 81 includes a vacuum pump 81a that generates negative pressure, and the ventilation duct of the arm part 82 has one end connected to the vacuum pump and the other end opened to the outside air at a duct opening 83a.
Thereby, the suction device 8 suctions air from the duct opening 83a by the operation of the vacuum pump 81a of the main body 81.

As shown in FIG. 1, the protector 1 is attached to the suction part 8K by a protector attachment structure TK (details will be described later).
In dental treatment and treatments, a worker (not shown) adjusts the posture of the suction unit 8K using the arm unit 82, and places the protector 1 on the face H11 of the patient H1 who is seated on the patient chair H2 and facing upward. It is placed so as to cover the face H11 above.
In FIG. 1, an example of the orientation of the protector 1 in dental treatment is shown in which the suction part 8K is positioned above the chest of the patient H1 so that the distal end side of the protector 1 faces the head side. The orientation of the protector 1 is not limited to the orientation shown in FIG.

The protector 1 is formed by, for example, bending a protector blank plate 1S shown in FIG.
FIG. 2 is a plan view of the protector blank 1S. In the following description with reference to FIGS. 2 to 8, the up, down, left, and right directions are defined by the directions shown by the arrows in FIG. These up, down, left and right directions are defined for convenience of explanation, and do not limit the posture or usage of the protector blank plate 1S. The vertical direction is also referred to as the width direction of the protector blank 1S.
Further, the front side of the paper in FIG. 2 is the front side, and the back side of the paper is the back side. The front side and the back side correspond to the outside and inside of the three-dimensional protector 1.

The protector base plate 1S is a thin plate made of transparent hard resin and is formed into a substantially rectangular shape. An example of the material is a thin plate of transparent PET (polyethylene terephthalate) with a thickness of 0.3 mm.
The protector blank plate 1S is formed into a generally rectangular shape with its length extending in the left-right direction in FIG. 2, and its four corners are rounded arcuate portions Ra to Rd. The protector blank plate 1S is vertically symmetrical with respect to a center line CL1 extending left and right.

The protector blank 1S has a mounting portion 33 at a position closer to the right side with respect to the left and right center position.
The attachment portion 33 includes the first engagement hole 15, the second flap 161, the second engagement hole perforation 17M, and the first flap 18.
The first engagement hole 15 has an arc shape, and the center Ct is on the center line CL1.
The left inner edge of the first engagement hole 15 on the center line CL1 is cut to the left, and the second flap 161, which is a flap projecting rectangularly to the right from the deep part of the cut, is located above and below the inner edge of the first engagement hole 15. A slit 162 is formed in the slit 162 .
A first flap 18 is formed above the center line CL1 on the left side of the first engagement hole 15 as a flap whose left side is the root and whose right side can be cut and raised.

The second engagement hole perforation 17M is formed as a perforation on the outside of the first engagement hole 15 in the radial direction. Specifically, the second engagement hole perforation 17M has a substantially pot-shaped shape in which a pair of upper and lower arcuate portions 17Ma, 17Mb and a small-diameter arcuate portion 17Mc on the right side thereof are connected.

The left end portion of the second engagement hole perforation 17M is bent at an angle of approximately 60° with respect to the center line CL1 so as to return to the first engagement hole 15, and is connected to the first engagement hole 15.
A first notch 16a and a second notch 16b are formed at the portions where both ends of the second engagement hole perforation 17M are connected to the first engagement hole 15, respectively.
The second engagement hole perforation 17M is formed as an intermittent cutting site so that it can be cut by hand, and the first notch 16a and second notch 16b facilitate starting cutting by hand. .

The protector blank 1S has a first slit 111 cut halfway from the first side 1Sa of two opposing longitudinal sides toward the second engagement hole perforation 17M, and a The first ruled line portion 112 is connected to the second engagement hole perforation 17M at a connection point P1.
The protector blank 1S also has a second slit cut halfway from the second side 1Sb, which is the other long side, toward the second engagement hole perforation 17M, and a second slit cut from the tip of the second slit 121 to the second engagement hole perforation 17M. It has a second ruled line portion 122 that connects to the engagement hole perforation 17M at a connection point P2.
The connection points P1 and P2 are on the left side of a center line CL2 that is perpendicular to a center line CL1 passing through the center Ct of the first engagement hole 15.

With the first slit 111 and the second slit 121 as boundaries, the left side portion in FIG. 2 is the base portion 31, and the right side portion is the apron portion 32.

The first slit 111 and the second slit 121 are completely cut notches. The first ruled line portion 112 and the second ruled line portion 122 are portions that are continuously half-cut from the front side, and are indicated by dashed lines in FIG. 2 .
The first slit 111 and the first ruled line part 112 are formed on the same straight line, and are inclined at a predetermined angle θa with respect to the center line CL1 so that the farther from the second engagement hole perforation 17M, the more to the right. It is formed. The angle θa is, for example, about 75°.

In the base portion 31, a half-cut is made continuously from the surface side in a straight line between the connection point P3 between the first slit 111 and the first ruled line portion 112 and the connection point P4 between the arcuate portion Ra and the first side 1Sa. The first side ruled line portion 13 is made of
A portion on the outside (upper side in FIG. 2) with respect to the first side ruled line portion 13 is defined as a first bent portion 312 .
Between the connection point P5 between the second slit 121 and the second ruled line part 122 and the connection point P6 between the arcuate part Rb and the second side 1Sb, there is a second side ruled line that is half-cut from the surface side in a straight line. Section 14. The ruled line portion is a portion that can be bent by hand.

A portion on the outside (lower side in FIG. 2) with respect to the second side ruled line portion 14 is defined as a second bent portion 313. A portion between the first side ruled line portion 13 and the second side ruled line portion 14 is defined as a central base portion 311. The surface of the central base 311 on the front side in the drawing is a front surface 311a, and the surface on the opposite side is a back surface 311b. The first flap 18 is formed on the central base 311 and can be raised at least toward the back surface 311b.

In the apron portion 32, an apron separation perforation 23 is formed at approximately the center position in the left-right direction, connecting the first side 1Sa and the second side 1Sb and extending in the vertical direction. A third notch 23a and a fourth notch 23b are provided at a portion connected to the first side 1Sa at the upper end of the apron separation perforation 23 and a portion connected to the second side 1Sb at the lower end to facilitate manual separation. is formed.
The left side of the apron part 32 with respect to the apron separation perforation 23 is a root apron 321, and the right side is a tip apron 322.

On the right side of the first bent portion 312 , a first cut portion 21 in the shape of a short line segment is formed parallel to the first side ruled line portion 13 .
On the right side of the second bent portion 313, a short segment-shaped second cut portion 22 is formed parallel to the second side ruled line portion 14.

At the upper part of the root apron 321, there is a first insertion piece 19 that can be inserted into the first notch 21 when the apron part 32 is bent so that the first slit 111 and the first side ruled line part 13 overlap. is formed.
At the lower part of the root apron 321, there is a second insertion piece 20 that can be inserted into the second notch 22 when the apron part 32 is bent so that the second slit 121 and the second side ruled line part 14 overlap. is formed.

A set of the first notch portion 21 and the first insertion piece 19 that can be inserted into the first notch portion 21 is referred to as a first locking portion 34.
A set of the second notch portion 22 and the second insertion piece 20 that can be inserted into the second notch portion 22 is referred to as a second locking portion 35 .

The protector blank plate 1S described above is bent to the back side at the first side ruled line part 13, second side ruled line part 14, first ruled line part 112, and second ruled line part 122, and the first insertion piece 19 and the second insertion piece A three-dimensional protector 1 is obtained by inserting the pieces 20 into the first notch 21 and the second notch 22, respectively.

Next, a specific procedure for forming the protector 1 by three-dimensionalizing the protector blank 1S and attaching it to the suction part 8K will be described with reference to FIGS. 3 to 6.

First, as shown in FIG. 3, the first bent part 312 and the second bent part 313 of the protector blank 1S are bent at the center base, with the first side ruled line part 13 and the second side ruled line part 14 being bent parts, respectively. 311 toward the back side 311b (see arrow DR1). Specifically, the first bent portion 312 and the second bent portion 313 are made to stand on their own at an angle of about 90° with respect to the central base 311 when the bending force is removed.

Next, as shown in FIG. 4, the apron part 32 is bent approximately 90 degrees toward the back surface 311b of the central base 311, using the first ruled line part 112 and the second ruled line part 122 of the protector blank 1S as the bending parts. (See arrow DR2). That is, the apron portion 32 is bent from one edge of the central base 311.

Furthermore, both ends of the apron part 32 are rolled inward (see arrow DR3), and the second insertion piece is inserted into the second notch part 22 to form the second locking part 35, as shown in FIG. do. Similarly, although not shown on the opposite side of FIG. 5, the first insertion piece 19 is inserted into the first notch 21 to form the first locking part 34.

As a result, in the protector blank 1S, at one edge in the width direction (vertical direction in FIG. 2) of the central base 311, the first bent portion 312 and one end of the apron portion 32 are connected to the first locking portion 311b, and is bent approximately 90 degrees toward the back surface 311b and maintained. Further, at the other edge in the width direction of the central base 311, the second bent portion 313 and the other end of the apron portion 32 are engaged with each other at the second locking portion 35, so that the second bent portion 313 and the other end of the apron portion 32 are engaged with each other at an angle of about 90° toward the back surface 311b. Bent and maintained.

In this state, as shown in FIG. 2, since the first ruled line part 112 and the second ruled line part 122 are formed to be inclined at an angle θa that is not 90° with respect to the center line CL1, the central base A force is applied to 311 to cause the center portion in the width direction to protrude outward. Therefore, depending on the force and the bending rigidity of the material of the protector base plate 1S, the central base 311 is maintained so as to extend in a flat plate shape, or becomes convex outward as shown by the arrow DR4 in FIG. It is maintained in a gently curved shape.
It is preferable for the central base 311 to be maintained in a curved manner because this increases bending rigidity.

Further, the first ruled line portion 112 and the second ruled line portion 122 are formed to be inclined at an angle θa that is not 90° with respect to the center line CL1. Therefore, with respect to the first locking part 34 and the second locking part 35, the insertion direction is such that the first insertion piece 19 and the second insertion piece 20 bite into the first notch part 21 and the second notch part 22, respectively. A force is applied that forces it to open outward.
This makes it more difficult for the first locking portion 34 and the second locking portion 35 to come off, and the three-dimensional shape of the protector 1 is maintained stably.

As shown in FIG. 2, the connection points P1 and P2 are on the left side of a center line CL2 that passes through the center Ct of the first engagement hole 15 and is perpendicular to the center line CL1.
Therefore, in the protector 1 in which the protector blank 1S is made three-dimensional, the second flap 161 of the attachment portion 33 is located on the center base 311 side, and most of the first engagement hole 15 is located on the apron portion 32 side.

As shown in FIG. 5, in the suction part 8K to which the protector 1 is attached, the duct tip 83 is formed in a tubular shape, and the hood 84 is partially inserted into the duct opening 83a of the duct tip 83. It is attached to the section 83 by, for example, a bayonet structure.

The hood 84 is a tubular member having a base portion 84a, a collar portion 84b, a flange portion 84c, and an insertion portion 84d.
The base portion 84a is formed in the shape of a conical circumferential surface whose inner diameter and outer diameter gradually increase toward one end (left side in FIG. 5).
The flange portion 84b is a portion formed at one end of the base portion 84a where the outer shape sharply expands.
The minimum inner diameter of the base portion 84a is approximately the same as the inner diameter of the duct opening 83a of the duct tip portion 83.

The flange portion 84c is a portion formed as a circumferential rib on the other end side (right side in FIG. 5) of the base portion 84a so as to protrude outward in the radial direction.
The insertion portion 84d is formed concentrically with the base portion 84a on the opposite side of the base portion 84a with respect to the flange portion 84c. The outer diameter of the insertion portion 84d is slightly smaller than the inner diameter of the duct opening 83a of the duct tip 83.

The inner diameter of the first engagement hole 15 in the protector 1 is slightly larger than the outer diameter of the insertion portion 84d of the hood 84 and smaller than the outer diameter of the duct tip 83.
Further, the approximate distance L18 from the first engagement hole 15 to the base of the first flap 18 in the protector 1 is equal to the distance L84a in the axial direction from the base of the insertion portion 84d in the hood 84 to the end of the collar portion 84b. , approximately the same or slightly longer.

With this structure, the insertion portion 84d of the hood 84 is inserted into and engaged with the first engagement hole 15 of the protector 1 from the inside to the outside, and the first flap 18 of the protector 1 is bent to bend the flange portion 84b of the hood 84. Hang it on the inside of. Then, the insertion portion 84d of the hood 84 is inserted and attached to the duct opening 83a of the duct tip portion 83.

Thereby, the protector 1 can be attached to the suction part 8K having the hood 84 and the duct tip 83 using the protector attachment structure TK shown in FIG.
Specifically, in the protector 1, the edge of the first engagement hole 15 of the apron portion 32 is sandwiched between the flange portion 84c of the hood 84 and the end surface of the duct tip portion 83. Therefore, the protector 1 is restricted from moving in both directions of the axis CL83 of the duct opening 83a with respect to the duct tip 83.

Further, in the protector 1, the first flap 18 is elastically bent inward, and enters and engages the inside of the flange portion 84b of the hood 84. Therefore, the first flap 18 urges the flange portion 84b outward with the force F1 to return to its original state.
As a result, the protector 1 is restricted from moving to the left in FIG. 6, and is prevented from rotating around the axis CL83 due to the frictional force between the first flap 18 and the inner surface of the flange 84b caused by the force F1. Regulated.

The protector 1 can be attached to a hood 94 different from the hood 84 as follows.
FIG. 7 is a diagram showing the attachment portion 33A in a state where the second engagement hole perforation 17M of the protector blank plate 1S is cut by hand or the like, and the inner portion thereof is cut out. For easy understanding, the position of the first engagement hole 15 is indicated by a dashed line LN15.

By cutting along the second engagement hole perforation 17M, the second engagement hole 17 opened in that shape is formed as the second engagement portion KB2.
The second engagement hole 17 has arcuate portions 17a and 17b corresponding to the large diameter arcuate portions 17Ma and 18Mb connected to an arcuate portion 17c corresponding to the small diameter arcuate portion 17Mb at the second engagement hole perforation 17M. It has an almost pot-shaped shape.
The left end portions of the arcuate portions 17a and 17b are connected to arcuate portions 15a and 15b that are part of the first engagement hole 15.

FIG. 8 shows a protector 1A that is formed by cutting the attachment portion 33 of the protector blank plate 1S at the second engagement hole perforation 17M to form an attachment portion 33A, and three-dimensionally forming the attachment portion 33A in the same manner as in forming the protector 1. , is a perspective view showing a state where it is attached to a hood 94.

As shown in FIG. 8, the hood 94 has a base portion 94a, a protrusion portion 94b, and an insertion portion 94d.
The insertion portion 94d is inserted into the duct opening 83a (see FIG. 5) of the duct tip 83 and attached to the duct tip 83, for example, in a bayonet structure.
The base portion 94a is a bowl-shaped portion that extends from the left end of the insertion portion 94d in FIG. 8 so that the inner diameter and outer diameter thereof become larger toward the left.
The protruding portions 94b are portions that protrude outward in the radial direction in a semi-cylindrical shape at positions spaced apart by 90 degrees in the circumferential direction on the circumferential surface of the base portion 94a.

In the hood 94, the insertion portion 94d is inserted into the top of the attachment portion 33A from inside and engaged with the insertion portion 94d. At this time, as shown in FIG. 8, the arcuate portion 17a and the arcuate portion 17b of the attachment portion 33A are engaged with a slight force fit so as to correspond to the two protrusions 94b at the upper side of the paper in FIG. The arcuate portion 17c is engaged with the two protrusions 94b on the lower side of the paper in FIG. 8 with a slight force fit. Further, the second flap 161 is bent and engaged so as to be inserted inside the upper edge of the base portion 94a.

In the state shown in FIG. 8, the hood 94 is sandwiched between the arcuate portions 17a to 17c and the second flap 161, and movement of the insertion portion 94d in the direction of the axis CL94 is restricted.
Furthermore, rotation around the axis CL94 is restricted by engagement between the second flap 161, the protruding portion 94b, and the arcuate portions 17a, 17b.
Thereby, the protector 1A can be properly attached to the hood 94.
In this state, the protector 1A is properly attached to the suction part 8K by inserting and engaging the insertion part 94d of the hood 94 into the duct opening 83a of the duct tip part 83 and attaching it.

In the protectors 1 and 1A, the length of the apron portion 32 in the left-right direction in FIG. 2 can be shortened by cutting the apron separation perforations 23.
Examples of how the protectors 1 and 1A are used will be described together with the difference in length of the apron portion 32 with reference to FIGS. 9 to 12.
The front, rear, left, right, up and down directions in the explanation with reference to FIGS. 9 to 12 are the directions indicated by arrows in each figure.

9 and 10 are diagrams showing a first usage mode of the protector 1 in which the apron portion 32 is long. 11 and 12 are diagrams showing a second usage mode of the protector 1 in which the apron portion 32 is short.

Specifically, FIG. 9 is a partially sectional side view showing an example in which the protector 1 is attached to the suction unit 8K having the duct tip 83 and the hood 84 of the suction device 8 to perform dental treatment. FIG. 10 is a view of Ya from the front side of FIG. 9 .
11 is a diagram showing a case where the apron portion 32 is shorter than that in FIG. 9, and FIG. 12 is a diagram taken in the direction of arrow Yb in FIG. 11.

In FIG. 9, a patient H1 is shown seated on a patient chair H2, reclined so that his face H11 faces upward, and his oral cavity H12, which is the affected area, is open.
A treatment worker (not shown) adjusts the posture of the arm section 82, so that the suction section 8K is positioned above the chest H13 of the patient H1, and the duct opening 83a opens toward the head H14 side of the patient H1. are doing. The protector 1 is spaced apart above the face H11 of the patient H1, and is maintained in a posture in which the central base 311 is substantially horizontal. Here, treatment workers include dentists, dental assistants, dental technicians, dental hygienists, and the like.

When the suction device 8 is operated, air near the hood 84 is sucked into the duct opening 83a of the suction section 8K.
The upper part of the face part H11 and the chest part H13 of the patient H1 are covered and shielded by the central base 311 of the protector 1, and the left side and right side (direction perpendicular to the plane of the paper in FIG. 9) near the hood 84 are respectively folded into second folds. 313 and the first bent portion 312, and the space between the rear hood 84 and the chair H2 is generally shielded by the apron portion 32. Therefore, air in the inner space Va surrounded by the face H11, the chest H13, and the protector 1 is mainly sucked into the suction device 8 into the duct opening 83a as an airflow FLa.

As a result, particles such as powder and body fluids scattered from the oral cavity H12, which is the affected area in this case, are included in the airflow FLa and are well sucked by the suction device 8, and move to the outside of the protector 1 and adhere to the worker. Or there is little chance of being sucked in.
In dentistry, powders include shavings and polishing powder, and body fluids include blood and saliva. In addition, when the patient H1 is infected with a virus or bacteria, the viruses and bacteria expelled with exhaled air are also included in the scattered matter.

The apron portion 32 of the protector 1 can be made into only the root apron 321 without the tip apron 322 by cutting the apron separation perforations 23.
As shown in FIGS. 11 and 12, when the apron section 32 has only the base apron 321, the vertical distance La of the gap between the apron section 32 and the chair H2 is smaller than when the apron section 32 has only the base apron 321. big.
Therefore, the treatment tool or the worker's hand can be inserted not only from the tip side of the protector 1 but also from the apron part 32 side toward the affected area, the oral cavity H12, and the vicinity of the oral cavity H12, which improves the workability of treatment. will improve.

In the apron portion 32, since the root apron 321 remains, the air in the inner space Vb surrounded by the chest H13 and the protector 1 is sucked into the suction device 8 as an airflow FLb.
Therefore, in this case as well, scattered objects such as powder and body fluids scattered from the oral cavity H12 are included in the airflow FLb, are well sucked by the suction device 8, move to the outside of the protector 1, and are attached to or sucked into the worker. There is little possibility.

In the example shown in FIGS. 9 to 12, the protector 1 is oriented so that the apron portion 32 is located on the chest H13 side of the patient H1 to cover the face H11 with respect to the affected oral cavity H12. On the other hand, the protector 1 may be oriented so that the apron part 32 is located on the distal end side of the head H14 of the patient H1, so that the protector 1 covers the face part H11.

Further, although FIGS. 9 to 12 illustrate an example in which the affected area covered by the protector 1 is the oral cavity H12, the affected area is not limited to the oral cavity H12.
That is, the affected area may be a part of the patient H1 other than the oral cavity H12, such as a leg, abdomen, chest, or arm.

The protectors 1 and 1A can be easily formed into three-dimensional shapes by hand from the protector blank 1S by a person engaged in treatment or treatment.
The protectors 1 and 1A are formed by bending an apron part 32 on the other side with respect to a base part 31 on one side with respect to the first slit 111 and the second slit 121, and have a first locking part 34 and a second locking part. By locking at 35, the folded state of the apron portion 32 is stably maintained.

As described above, the protector 1 is designed such that the first engagement hole 15 as the first engagement part KB1 that can be engaged with the suction part 8K of the suction device 8 is generally included in the apron part 32. The base portion 31 includes a first flap 18 as a second engaging portion KB2 that can engage with the tip edge of the hood 84, which is a brim-like member of the suction portion 8K.
That is, in the protector 1, the first engaging part KB1 and the second engaging part KB2, which engage with the suction part 8K, are arranged in the apron part 32 and the base part 31, which are maintained bent at approximately 90 degrees. .
In this way, the protector 1 engages with the suction part 8K at two engagement parts, and can be firmly and stably attached.

Further, the protector 1A is located with respect to the suction part 8K of the suction device 8 so that the second engagement hole 17 as the first engagement part KB1 that engages with the suction part 8K is generally included in the apron part 32, A second flap 161 serving as a second engaging portion KB2 that engages with the tip of the hood 94 of the suction portion 8K is located within the base portion 31.
That is, in the protector 1A, a first engaging part KB1 and a second engaging part KB2, which engage with the suction part 8K, are arranged in the apron part 32 and the base part 31, which are maintained bent at approximately 90 degrees. .
Thereby, the protector 1A engages with the suction part 8K at two engagement parts, and can be firmly and stably attached.

The embodiments of the present invention are not limited to the configuration and procedure described above, and modifications may be made without departing from the gist of the present invention.

The protectors 1 and 1A function as a face shield that covers the face H11 when the affected area is on the face H11, such as the oral cavity H12, as shown in FIGS. 9 to 12.

The angle θa of the first slit 111 and the second slit 121 with respect to the center line CL1 in the protector blank 1S is not limited. The angle θa may be 90°. Further, it is better if the angle θa is not 90° but obliquely intersects the center line CL1.

The material of the protectors 1 and 1A is not limited to PET. Further, the degree of transparency may be such that the affected area can be clearly seen through the protectors 1 and 1A and treatment and treatment can be performed.

The protector blank 1S is not limited to the two types described above, but may be three-dimensional so that it can be attached to three or more types of suction parts 8K. Moreover, the protector blank 1S may be one that can be attached only to one specific suction part 8K.

The protectors 1 and 1A may engage with the suction portion 8K at three or more engagement portions. Specifically, the protector 1 may include a plurality of first flaps 18, and the protector 1A may include a plurality of second flaps 161.

1,1A Protector 1S Protector blank 1Sa First side 1Sb Second side 111 First slit 112 First ruled line part 121 Second slit 122 Second ruled line part 13 First side ruled line part 14 Second side ruled line part 15 1 engagement hole 15a, 15b arcuate portion 161 second flap 162 slit 16a first notch 16b second notch 17M second engagement hole perforation 17Ma, 17Mb, 17Mc arcuate portion 17a, 17b, 17c arcuate portion 18 First flap 19 First insertion piece 20 Second insertion piece 21 First notch 22 Second notch 23 Apron separation perforation 23a Third notch 23b Fourth notch 31 Base 311 Central base 311a Front surface 311b Back surface 312 First bent part 313 Second bent part 32 Apron part 321 Root apron 322 Tip apron 33, 33A Attachment part 34 First locking part 35 Second locking part 8 Suction device 8K Suction part 81 Main body part 81a Vacuum pump 82 Arm part 83 Duct tip 83a Duct opening 84 Hood 84a Base 84b Flange 84c Flange 84d Insertion part 94 Hood 94a Base 94b Projection 94d Insertion part CL1, CL2 Center line CL94 Axis Ct Center FLa, FLb Air flow F1 Force H1 Patient H11 Face Part H12 Oral cavity H13 Chest H14 Head H2 Chair KB1 First engaging part KB2 Second engaging part La Distance L18, L84a Distance P1 to P6 Connection point Ra to Rd Arc-shaped part TK Protector mounting structure Va, Vb Space θa Angle

Claims (5)

A transparent substantially rectangular thin plate,
a first engaging portion that is a hole formed on a center line extending in one direction and capable of engaging with a tubular member;
a second engaging portion that is a flap formed on the center line and capable of engaging with an edge of the brim member;
a pair of slits cut halfway toward the first engaging portion from each of the pair of opposing sides across the center line;
Protector base plate with. In the one direction, when one side of the pair of slits is a base and the other side is an apron part,
The protector blank plate according to claim 1, wherein the first engaging portion is located at the apron portion, and the second engaging portion is located at the base portion. a pair of ruled line portions formed so that each of the edges of the pair of sides of the base can be bent by hand;
When the edges of the pair of sides and the apron part are bent to the same side, the edges of the pair of sides are engaged with the portions of the apron part on the side of the pair of sides, so that the edges of the pair of sides are locked. 3. The protector blank plate according to claim 2, wherein a pair of locking portions are formed to maintain the side edges and the apron portion in a folded state. Made of transparent thin plate,
a base extending in a flat or curved shape;
an apron portion bent from one edge of the base;
a first engaging portion formed as a hole that engages with a tubular member in the apron portion;
a second engaging part that can be cut and raised at the base so as to engage with the flange of the tubular member;
Protector with. A protector mounting structure for attaching a protector to a suction part at the tip of a suction device,
The suction part is
a duct tip having an opening for sucking air;
a hood that is attached to the tip of the duct and has a tubular insertion portion that is inserted into the opening, and a base that surrounds the opening and increases in diameter toward the tip;
Equipped with
The protector is
Made of transparent thin plate,
a base extending in a flat or curved shape;
an apron portion bent from one edge of the base;
a first engaging part that can be engaged with the hood in the apron part;
a second engaging portion that is engageable with an edge of the hood at the base;
Equipped with
inserting and engaging the insertion portion or the base portion of the suction portion with the first engaging portion;
engaging the second engaging portion with an edge of the hood;
A protector mounting structure, characterized in that the protector is mounted to the suction section.

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