JP5018633B2 - Grooming brush - Google Patents

Description

  The present invention relates to a grooming brush that combs pet hair, and more particularly to a grooming brush that is connected to a vacuum cleaner so that pet hair can be sucked while whispering pet hair. It is.

  As a conventional grooming brush of this type, the brush has a connection body connected to a hose of a vacuum cleaner at one end and a suction port formed at the other end. In addition, there is one in which a comb-teeth support having a coarse comb tooth and a fine comb tooth in the outer peripheral longitudinal direction is rotatably provided (see, for example, Patent Document 1).

  When using this grooming brush, the user operates the rotating operation unit connected to the comb support, selects the comb that matches the pet's hair, makes it protrude from the suction port, While operating the connected vacuum cleaner, the hair of the combing teeth is instantaneously sucked by gripping the body of the combing body and combing the pet's hair.

  However, in the above-described conventional grooming brush configuration, when there are many hairs that come out of the pet, the hair combed by the comb teeth is stuck between the comb teeth and remains unsucked, which makes subsequent processing difficult. There was a problem.

  In order to solve the above problem, one comb tooth combing the pet hair is protruded from the pore, and after combing the pet hair, one comb tooth is placed inside the pore. Some have been stored so that the hair remaining between the comb teeth can be easily removed (see, for example, Patent Document 2).

  9 is a perspective view of the conventional grooming brush described in Patent Document 2, FIG. 10 is a sectional view of the grooming brush, and FIG. 11 is a perspective view of the grooming brush (the brush case is on the top). It is a raised state).

  9-11, the main body 1 of the conventional grooming brush is formed with a connection pipe 2 connected to a hose (not shown) of a vacuum cleaner on the rear side, and a brush base 3 is provided inside. Yes. A comb portion 4 made of a plurality of metal pins is formed at the lower portion of the brush base portion 3. Reference numeral 5 denotes an inner cylinder which is provided on the main body 1 so as to be movable up and down, and is urged downward by an urging means (not shown), and a brush case 6 is integrally formed at a substantially intermediate portion. An air passage 7 communicating with the connection pipe 2 is formed between the inner wall 5 a of the inner cylinder 5 and the brush case 6. On the lower surface of the brush case 6, pores 8 through which the pins 4 a constituting the comb teeth 4 pass are formed.

  When the grooming brush is in a free state, that is, when the grooming brush is not used, the inner cylinder 5 is urged downward by the urging means as shown in FIGS. The tip of 4a is housed in the pore 8 of the brush case 6. Next, in order to comb pet hair with the grooming brush, when the lower end of the grooming brush, that is, the lower end of the inner cylinder 5 is pressed against the pet against the biasing force of the biasing means, as shown in FIG. Further, the inner cylinder 5 rises upward, and the pins 4a of the comb teeth 4 protrude from the pores 8 of the brush case 6, so that pet hair can be combed.

  The operation and action of the conventional grooming brush configured as described above are as follows.

  Connect the tip of the vacuum cleaner hose to the grooming brush connection pipe 2, hold the connection pipe 2 that also serves as the handle, and press the lower end of the inner cylinder 5 against the skin of the pet while operating the vacuum cleaner. Then, the inner cylinder 5 is pushed up, and the pins 4 a of the comb teeth 4 protrude downward from the pores 8 of the brush case 6. In this state, pet hair can be combed by moving the grooming brush so that it pulls from front to back. The hair combed by the comb teeth 4 is sucked by the vacuum cleaner through the air passage 7 between the inner wall 5a of the inner cylinder 5 and the brush case 6, the connection pipe 2, and the hose in this order.

When there are many crushed hairs, they cannot be completely sucked by the suction force of the electric vacuum cleaner and may remain caught between the pins 4a of the comb teeth 4. At that time, by lifting the grooming brush, the brush case 6 moves downward together with the inner cylinder 5 due to the biasing force of the biasing means. It is immersed in the pore 8. At this time, the hair caught between the pins 4a is detached from the pins 4a so as to sway, and is instantaneously sucked by the suction force of the vacuum cleaner. By repeating the above operation, pet hair can be combed efficiently.
Japanese Patent Laid-Open No. 11-178743 Japanese Utility Model Publication No. 7-039576 (microfilm of Japanese Utility Model Application No. 5-076752)

  However, in the configuration of the conventional grooming brush described in Patent Document 2, since the pins 4a of the comb teeth 4 are projected and retracted through the pores 8 of the brush case 6, the pins 4a are made thin and rod-shaped. There was a need to do. For this reason, the pin 4a easily deforms, the pin 4a bites into the pet's skin, the pin 4a cannot smoothly pass through the pore 8, and the pin 4a remains out. There was a problem of poor usability.

  In order to solve this problem, a method of changing the pin 4a to a thicker one is also conceivable. However, this cannot be adopted because the hair of the pet cannot be cleaned beautifully.

  Moreover, in order to remove the hair entangled with the pin 4a with certainty, the gap between the pin 4a and the pore 8 is made small. For this reason, the pin 4a is inclined, the pet hair is stained on the outer periphery of the pin 4a, etc. When sticking, there also existed problems, such as the pin 4a being unable to move smoothly in the pores 8.

  SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described conventional problems, and to provide a grooming brush that is easy to use and has a simple configuration and does not deteriorate the combing performance and has few comb teeth deformation.

In order to solve the above-mentioned conventional problems, the grooming brush of the present invention includes an opening for sucking outside air at a front lower side of an outer shell provided with a connecting pipe connected to a vacuum cleaner, and the opening A comb tooth that protrudes and protrudes from a slit-shaped opening, and a hole for sucking outside air at a position spaced from the opening and the comb tooth. the than are formed in a slit shape, the teeth are less likely to deform, also, since the whole comb teeth infested through a slit-shaped opening, compared with the conventional one each tooth infested through small hole, at infested The resistance is reduced, making it easier to use. Furthermore, when pets are combed, even if dust or the like soars around, it is sucked from the hole, so it is very hygienic.

The grooming brush of the present invention has a simple configuration and is easy to use with little comb teeth deformation without deteriorating the rolling performance. It is also hygienic.

1st invention is provided with the opening part for attracting | sucking external air in the front lower direction of the outer shell provided with the connection pipe connected to a vacuum cleaner, and the comb which protrudes and protrudes from the slit-shaped opening in the vicinity of the said opening part Grooming brush that has teeth and a hole for sucking outside air at a position away from the opening and the comb teeth. The teeth are difficult to deform, and the resistance at the time of intrusion is reduced. It will be a thing. Also, when pets are combed, even if dust or the like soars around, it is sucked from the hole, which is very hygienic. In addition, when cleaning the flooring with the grooming brush, even if the opening is blocked on the floor surface, the outside air flows in through the holes, so the grooming brush adsorbs to the flooring surface and cleans it smoothly. There is no such thing as becoming impossible.

According to a second aspect of the present invention, the comb teeth and the slit-shaped opening are provided in a comb housing body, the comb tooth housing is contained in a comb housing body chamber having an opening, and the comb tooth housing chamber is connected. Since it is configured to communicate with the tube, the openings for the comb teeth to appear and form are formed in a slit shape, so that each tooth forming the comb teeth can be shaped like a mountain to increase the rigidity and the teeth are deformed In addition, since the entire comb teeth appear and disappear through the slit-shaped opening, the resistance at the time of emergence is less than that of the conventional one in which each of the teeth appears and disappears through the narrow hole, and it is easy to use.

A third invention is a rotatable comb tooth storage body, wherein comprises a dial for a comb container is rotated, a plurality of different comb shapes of teeth on the comb container, rotating the dial Thus, the type of comb teeth to be used can be changed, and the type of comb teeth to be used can be easily changed simply by rotating the dial.

According to a fourth aspect of the present invention, a lever that can move in the front-rear direction is arranged on the side wall of the comb-teeth storage body chamber , and the comb-teeth protrude from the opening in conjunction with the movement operation of the lever in the front-rear direction. In addition, the operation for raising and lowering the comb teeth is easy, and the mechanism for raising and lowering the comb teeth can be simplified, and the grooming brush can be configured at low cost.

According to a fifth aspect of the present invention, at least the lower part of the comb-teeth storage body is air-tight between the portion located on the front side of the opening and the wall forming the comb-teeth storage body chamber. Since part of the air does not pass through the front part of the comb housing, the curled hair does not wrap around the outer periphery of the comb housing, and the hair suction is smooth and reliable. To be done.

A sixth invention is the rear side of the opening of the comb teeth container, which was provided with the opening parallel to the step, the hair soiled by the step is prevented from close contact with the surface of the comb teeth container, ensure Hair can be sucked into.

7th invention provided the click mechanism which temporarily fixes the rotation of a comb-tooth storage body by the position which protrudes a comb-tooth downward, and the position of other than that, The position which makes a comb-tooth protrude below If the rotation of the comb-teeth container is temporarily fixed, the comb-teeth container does not turn around when pets are combed, and the comb teeth protrude downward. If the rotation of the comb storage body is temporarily fixed at a position other than the position where the comb teeth are stored, the comb storage body rotates when the flooring is cleaned with the grooming brush, and the comb teeth protrude from the opening. There is no such thing as scratching the flooring.

According to an eighth aspect of the present invention, a plurality of concave portions or convex portions are provided on the inner surface of the outer wall on the downstream side of the air from the opening. When the hair is sucked vigorously from the opening, the hair is temporarily removed from the opening. It hits the ceiling part etc. in the comb-teeth storage body room on the downstream side, and then flows to the connection pipe, but since there are a plurality of concave parts or convex parts there, dirty hair adheres to that part. Therefore, it is hygienic and easy to maintain.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
1 is an external perspective view of the grooming brush according to the first embodiment of the present invention, FIG. 2 is a plan view of the grooming brush, FIG. 3 is an exploded perspective view of the grooming brush, and FIG. 2 is a sectional view taken along the line AA in FIG. 2, FIG. 5 is an exploded perspective view of the comb-teeth housing, FIG. 6 is a sectional view taken along the line BB in FIG. 2, and FIG. .

  1-7, the outer shell 11 of the grooming brush 10 in the present embodiment is fixed to the outer shell left 11a with a screw (not shown) or the like so as to abut the outer shell left 11a and the outer shell left 11a. Comb housing chamber that is composed of outer right 11b, and that includes outer comb left 12a and outer right 11b, and has a comb-teeth housing 12 to be described later rotatably therein and an opening 13 below. 14 is formed, and at the rear part is a handle part when the grooming brush 10 is used, and a connecting pipe 15 connected to a hose (not shown) of a vacuum cleaner is formed. A suction port 14 a communicating with the connection pipe 15 is formed on the rear wall.

  A plurality of holes 11c for taking in outside air are provided in the upper part of the portion of the outer shell left 11a and the outer shell right 11b forming the comb-teeth storage body chamber 14.

  Reference numeral 17 denotes a lever that is slidable in the front-rear direction and moves up and down comb teeth (thin) 26a and comb teeth (coarse) 26b described later built in the comb-teeth storage body 12 on the outer surface. An operation knob 17a is provided. Reference numeral 18 denotes a cover left attached to the outer left 11 a so as to cover the lever 17, and an opening 18 a that the knob 17 a of the lever 17 faces is formed.

  19 is a click mechanism for temporarily fixing the comb-teeth storage body 12 at a predetermined rotational position described later, 20 is a cover right fixed to the outer right 11b so as to cover the click mechanism 20, and 27 is a click mechanism. The dial is connected to the dial 20.

  As shown in FIG. 5, the comb-teeth storage body 12 includes a pair of case members 21 each having a substantially arc-shaped cross section, and a comb-teeth holding member 22 accommodated in the pair of case members 21 so as to be movable in the vertical direction. The pair of case members 21 are made up of a fixed plate left 23 that fixes the left side so as to attach each other, a fixed plate right 24 that fixes the right side, and a shaft body 25 that penetrates the comb-teeth holding member 22. .

  In this embodiment, a comb-like (thin) blade 26a having a fine blade shape is formed on one side of the comb-teeth holding member 22, and a comb-tooth (coarse) 26b having the same blade shape and a rough eye is provided on the opposite side. Each is attached.

Further, when the pair of case members 21 are assembled so as to be attached to each other, the openings 16 for the comb teeth (thin) 26a and the comb teeth (coarse) 26b to appear and disappear are formed in a slit shape in a part of the outer periphery. It has come to be.

  The fixing plate left 23 is provided with a long hole 23a through which the other end of the shaft body 25 penetrates and allows the shaft body 25 to move up and down.

  A long hole 11d through which one end of the shaft body 25 protrudes from the long hole 23a of the fixing plate left 23 of the comb tooth storage body 12 is formed in the outer left 11a.

  On the inner surface of the lever 17, a guide groove 17b for guiding the end portion of the shaft body 25 protruding from the long hole 11d provided in the outer left 11a is formed obliquely.

  A groove (not shown) for guiding one end of the shaft body 25 is provided on the inner side of the fixing plate right 24, a square hole 24 a is provided on the outer side, and the outer right part 11 b has the comb-teeth storage body 12. An opening 11e is formed through which a square hole 24a provided on the right 24 of the fixing plate faces.

  The click mechanism 19 has a cam body 28 having notches 28a (equally arranged at four positions in the present embodiment) on the outer periphery, one end pivotally supported on the outer right 11b, and the other end The provided claw portion 29a includes a claw body 29 slidably engaged with the notch 28a, and an urging means 30 for urging the end portion of the claw body 29 in a direction to engage the notch 28a of the cam body 28. In addition, the comb housing 12 is temporarily fixed and rotated in only one direction.

  A fitting portion (not shown) that fits into the square hole 24a of the comb-teeth storage body 12 is formed inside the cam body 28, and a shaft portion 28b that engages with the dial 27 is formed outside. Yes.

  In the present embodiment, as shown in FIG. 4, the comb-teeth storage body 12 is configured so that at least the comb teeth (thin) 26a or the comb teeth (coarse) 26b can move in the vertical direction. 12 is configured to be airtight between a portion located on the front side of the opening 16 and a wall forming the comb-teeth housing body chamber 14 (portion A in FIG. 4).

  The operation and action of the grooming brush in the present embodiment configured as described above are as follows.

  First, the comb tooth (thin) 26a or the comb tooth (coarse) 26b, whichever matches the hair of the pet is selected. The following description is based on an example in which the comb tooth (coarse) 26b is selected. When the dial 27 is turned by hand so that the comb teeth (coarse) 26b face downward, as shown in FIG. 6 (a), when the comb teeth (coarse) 26b face right below, Since the claw portion 29a engages with one notch 28a of the cam body 28 and the rotation of the comb-teeth storage body 12 is temporarily fixed, the user feels the click feeling generated at that time and the comb teeth (coarse) 26b. Recognize that is facing straight down.

  FIG. 7A shows a state in which the lever 17 is located at the foremost position and the shaft body 25 of the comb-teeth storage body 12 is located at the upper end of the guide groove 17b. Coarse) 26 b is stored in the comb-teeth storage body 12. Here, when the knob 17a of the lever 17 is moved to the rear side, the shaft body 25 is pushed downward by the oblique guide groove 17b, and as shown in FIG. It protrudes downward from the opening 16 of the comb-teeth container 12. At this time, the comb teeth (coarse) 26 b are located on the front side of the opening 13 and protrude downward from the opening 13.

  Then, the connecting pipe 15 of the grooming brush 10 is connected to a hose (not shown) of a vacuum cleaner (not shown), and the grooming brush 10 is pulled from the front to the back while operating the vacuum cleaner. Comb the pet's hair.

  As shown in FIG. 4, the hair C is once caught on the rear side of the comb teeth (coarse) 26b, but as shown by the arrow, the hair C gets on the air flowing obliquely backward from the opening 13 and is instantaneously sucked and sucked. It is sucked into the vacuum cleaner through the mouth 14a, the connecting pipe 15, and the hose.

  If the pet's hair continues to be combed, the hair may sometimes remain entangled with the comb teeth (coarse) 26b without being sucked. At this time, when the knob 17a of the lever 17 is moved forward, as shown in FIG. 4B, the comb teeth (coarse) 26b rises, and the tips of the comb teeth (coarse) 26b are the comb teeth storage body 12. Immerses in the opening 16 of At this time, since the hair C entangled with the comb teeth (coarse) 26b is squeezed at the edge of the opening 16, the hair C entangled with the comb teeth (coarse) 26b comes off from the comb teeth (coarse) 26b and is surely Can be aspirated.

  When the comb teeth (thin) 26a is used, the comb teeth (thin) 26a can be protruded from the opening portion 13 by further rotating the dial 27 counterclockwise by the same action as described above.

  As described above, according to the present embodiment, the openings 16 for the comb teeth (thin) 26a and the comb teeth (rough) 26b to appear and disappear are formed in a slit shape, so that the comb teeth (thin) 26a and the comb Each tooth forming each of the teeth (coarse) 26b can be shaped like a mountain to increase rigidity, and the teeth are difficult to deform, and the comb teeth (thin) 26a and the entire comb teeth (coarse) 26b are slit-shaped. Since the teeth appear and disappear through the opening 16, the resistance at the time of emergence is reduced compared to the conventional one in which each of the teeth appears and disappears through the narrow hole, and the use is easy. In addition, since the comb teeth (thin) 26a and the comb teeth (coarse) 26b protrude on the front side of the opening 13, the pets combed by the comb teeth (thin) 26a and the comb teeth (coarse) 26b The hair can be efficiently and reliably sucked by the suction air flowing obliquely backward from the opening 13.

  Further, the user can easily select and switch the comb teeth (thin) 26a and the comb teeth (coarse) 26b simply by rotating the dial 27. In the above embodiment, two types of comb teeth (thin) 26a and comb teeth (coarse) 26b are provided, but comb teeth for other purposes may be further provided.

  Further, the comb teeth (thin) 26a and the comb teeth (coarse) 26b are projected and retracted from the opening 16 in conjunction with the movement operation of the lever 17 in the front-rear direction, so that the comb teeth (thin) 26a and comb teeth (coarse) ) 26b can be moved up and down without an excessive load on the arm, and the mechanism for moving it up and down can be simplified, and the grooming brush can be constructed at low cost.

  In addition, since the hole 11c for sucking outside air is provided in the upper part of the comb-teeth storage body chamber 14, even when dust or the like rises around the pet's hair, it is sucked from the hole 11c. Is very hygienic.

  In addition, by air-tightening between a portion of the lower portion of the comb-teeth storage body 12 that is located in front of the opening 16 and a wall that forms the comb-teeth storage body chamber 14, Since the portion does not pass through the front part of the comb-teeth storage body 12, the crushed hair does not wrap around the outer periphery of the comb-teeth storage body 12, and the suction of the hair is performed smoothly and reliably. Is called.

  Further, when using the comb teeth (thin) 26a or the comb teeth (coarse) 26b, the click mechanism 19 temporarily fixes the rotation of the comb teeth storage body 12 at the position where it protrudes from the opening 13, and Since it rotates only in one direction (from the front to the rear in this embodiment), when combing the pet's hair, the comb-teeth storage body 12 turns and the hair does not burn well. There is nothing.

  Next, the case where the flooring is cleaned with the grooming brush 10 according to the present embodiment will be described.

  First, the knob 17a of the lever 17 is operated, and either the comb teeth (thin) 26a or the comb teeth (coarse) 26b as shown in FIG. Store inside. Next, as shown in FIG. 4C, the dial 27 is rotated 90 degrees counterclockwise. Also at this time, the claw portion 29a of the claw body 29 is engaged with one of the notches 28a provided in the cam body 28, and the rotation of the comb tooth storage body 12 is temporarily fixed.

  In this state, the flooring can be cleaned with the grooming brush 10 by connecting the grooming brush 10 to the hose of the vacuum cleaner. In particular, in the present embodiment, the rotation of the comb-teeth container 12 is temporarily fixed with the comb teeth (thin) 26a or the comb teeth (coarse) 26b turned sideways, so that the flooring is cleaned with a grooming brush. Even if the knob 17a of the lever 17 is accidentally touched, the comb teeth (thin) 26a or the comb teeth (coarse) 26b do not protrude from the opening 13 and damage the floor surface.

  Further, when the flooring is cleaned with the grooming brush, even if the opening 13 is blocked by the flooring, the outside air flows in from the holes 11c, so that the grooming brush is adsorbed on the floor surface of the flooring, There is no such thing as being unable to clean smoothly.

  FIG. 8A is a cross-sectional view of a main part of the grooming brush. As shown in the figure, a plurality of convex portions 32 are formed on the ceiling portion in the comb-teeth storage body chamber 14. FIG. 8B is an enlarged view of a portion D in FIG. 8A. As shown in the figure, a step 33 is formed on the rear side of the opening 16 on the surface of the comb-teeth storage body 12. Further, a rib 34 is provided in parallel with the opening 16.

  The operation and effect of this configuration will be described below.

  First, when the hair is sucked vigorously from the opening 13, the hair once hits the ceiling inside the comb-teeth housing body chamber 14 and then flows to the connecting tube 15. In this embodiment, the comb-teeth By providing the plurality of convex portions 32 on the ceiling portion inside the storage body chamber 14, a gap is formed between the hair and the ceiling portion, so that there is no close contact, and dirty hair is attracted and adhered to the ceiling portion. It is possible to prevent the remaining, and it is hygienic and easy to maintain. Further, floating dust sucked from the holes 11c is also effective in preventing adhesion. In the present embodiment, the plurality of convex portions 32 are provided on the ceiling portion. Instead, a plurality of concave portions (not shown) or the convex portions 32 and the concave portions can be provided together to obtain the same effect. I can do it.

  Further, when the pet hair is thin and dirty, it tries to spread on the surface of the comb-teeth storage body 12, but in the present embodiment, the step 33 is formed, so that the hair is Since it floats from the surface of the comb-teeth storage body 12 and the adhesiveness is thereby deteriorated, the hair is easily sucked and the usability is improved.

  In the above embodiment, the step 33 is formed by providing the rib 34. However, it is only necessary that the step 33 can be formed on the rear side of the opening 16 on the surface of the comb-teeth container 12, and a groove is provided instead of the rib. May be.

  As described above, the grooming brush according to the present invention has a simple configuration, is easy to use with little comb teeth deformation without deteriorating the rolling performance, and can be widely applied to various grooming brushes. is there.

1 is an external perspective view of a grooming brush according to the first embodiment of the present invention. Top view of the grooming brush Exploded perspective view of the grooming brush (A)-(c) AA sectional drawing of FIG. Exploded perspective view of comb-teeth container (A), (b) BB sectional drawing of FIG. (A), (b) CC sectional drawing of FIG. (A) Main part sectional view of the brush for grooming, (b) D part D enlarged view of (a) A perspective view of a conventional grooming brush Cross section of the grooming brush Perspective view of the grooming brush (brush case raised up)

DESCRIPTION OF SYMBOLS 10 Grooming brush 12 Comb storage body 13 Opening part 14 Comb storage body room 14a Suction port 15 Connection pipe 16 Opening 19 Click mechanism 26a Comb tooth (thin) (comb tooth)
26b Comb teeth (rough) (comb teeth)
27 Dial 32 Convex 33 Step

Claims (8)

An opening for sucking outside air is provided at the front lower side of the outer shell provided with a connecting pipe connected to the vacuum cleaner, and the opening is provided with comb teeth that protrude from a slit-like opening in the vicinity of the opening. And a grooming brush provided with holes for sucking outside air at positions spaced from the comb teeth. Comb teeth and slit-shaped openings are provided in a comb storage body, the comb tooth storage body is contained in a comb storage body chamber having an opening, and the comb tooth storage chamber communicates with a connecting pipe. The grooming brush according to 1. The comb-teeth storage body is rotatable, provided with a dial for rotating the comb-teeth storage body, the comb-teeth storage body is provided with a plurality of comb teeth having different tooth shapes, and the dial is rotated for use. The grooming brush according to claim 2 , wherein the type of comb teeth can be changed. The lever according to claim 2 or 3 , wherein a lever that is movable in the front-rear direction is arranged on a side wall of the comb-teeth storage body chamber, and the comb teeth are projected and retracted from the opening in conjunction with a movement operation of the lever in the front-rear direction. Grooming brush. The air tight according to any one of claims 2 to 4, wherein at least a lower portion of the comb-teeth storage body is airtight between a portion located in front of the opening and a wall forming the comb-teeth storage body chamber. Grooming brush. The grooming brush according to any one of claims 2 to 5, wherein a step is provided in parallel with the opening on the rear side of the opening of the comb-teeth storage body. The grooming brush according to any one of claims 2 to 6, further comprising a click mechanism that temporarily fixes the rotation of the comb tooth storage body at a position where the comb teeth protrude downward and a position other than that position. The brush for grooming of any one of Claims 1-7 which provided the some recessed part or the convex part in the inner surface of the outer shell of the air downstream side from an opening part.

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