JP2006125728A - Air flow direction changing mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air flow direction changing mechanism for a supply opening device capable of easily and quickly carrying out vertical position changing work of an air flow guiding means by optimizing an attachment state of the air flow guiding means to a supply opening body, and capable of realizing appropriate air conditioning by smoothly changing a blowing state of an air flow. <P>SOLUTION: A pin receiving part 23 is arranged while energizing it toward an air flow guiding means 20 side with respect to a support pin part 14 inwardly protruding from the supply opening body 10. Since the attachment state of the air flow guiding means 20 to the supply opening body 10 is provided by fitting the support pin part 14 and a recessed part 24 of the pin receiving part 23 together, a changed state of a positional relationship between the air flow guiding means 20 and the supply opening body 10 can be easily provided, a desired blowing state can be provided by simple operation, an appropriate blowing state responding to an air conditioning situation can be adjusted and selected by any worker, and an air conditioning effect by the supply opening device 100 can be enhanced. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an air outlet device arranged to face an air-conditioning target space, and in particular, it is possible to appropriately switch the air flow blowing state by holding the air flow guide means on the inner side of the air outlet main body with ease of position adjustment. The present invention relates to an airflow direction switching mechanism of an outlet device.

  In the air conditioning equipment, the air outlet device that blows out the conditioned air sent through the duct to the indoor space as the air conditioning target space is conditioned air in addition to the air blown out in a predetermined fixed blowing state. In general, a device that can switch the airflow blowing state of a plurality of types is also used. Among the airflow direction switching mechanisms for blowing out the conditioned air in a plurality of blowing patterns, the simplest one supports an airflow guiding means such as a middle cone in a blowout device so that it can be moved continuously or in multiple stages. It was a mechanism to change the blowing state of the airflow by adjusting the position. As such a conventional air outlet direction switching mechanism of the outlet device, there is one as shown in FIGS. FIG. 7 is a schematic cross-sectional view of a blowout device using a conventional airflow direction switching mechanism, and FIG. 8 is an explanatory diagram of a middle cone attachment process by the conventional airflow direction switching mechanism.

  In each of the drawings, a conventional air outlet device 100 is provided in a ceiling 50, connected to a duct 51 and supplied with conditioned air, and a cone-type outer cone portion for blowing this air indoors. The outer cone 101b has a lower end of the outer cone 101b formed with an edge 101c that stands perpendicular to the opening surface, and a plurality of cone-shaped blades 102a are concentrically spaced apart from each other. And a middle cone 102 as an airflow guiding means that are integrally formed in an overlapping manner and disposed inside the opening area of the outlet body 101.

  As an airflow direction switching mechanism in the air outlet device 100, a plurality of hooks 103 are provided on the outer peripheral surface of the air inlet side of the middle cone 102, and the inner peripheral surface of the air outlet body 101 is arranged in two upper and lower stages. A plurality of two-stage receiving metal fittings 104 formed by arranging two receiving portions 104a are arranged, and each of the middle cones 102 is inserted while the middle cone 102 is inserted into the outlet body 101 and moved to the correct position. This is a mechanism in which the middle cone 102 is attached to the outlet body 101 so that the position thereof can be adjusted by hanging the hanging bracket 103 on one of the upper and lower two-stage receiving portions 104a of each of the two-stage receiving brackets 104 of the outlet body 101.

  In the airflow direction switching mechanism of the conventional air outlet device 100, the position in which the hook 103 of the middle cone 102 is hung is changed to adjust the height position of the middle cone 102 in the air outlet body 101, and the conditioned air blowing pattern. It was a mechanism that can change. In the case of cooling, the hanging metal fitting 103 is hung on the lower receiving portion 104a and the middle cone 102 is attached to the lower side. In the case of heating, the hanging metal fitting 103 is hung on the upper receiving portion 104a to attach the middle cone 102 upward, and warm conditioned air is guided by the blade body 102a to the outlet body 101. It is made to blow down downward against the edge 101c of the air so that light conditioned air reaches the lower part of the room.

  The conventional airflow direction switching mechanism is configured as described above, and the receiving portions 104a of the two-stage receiving metal fitting 104 are functionally unrelated to each other and are independently arranged up and down. When switching the blowing state by moving 102, it becomes necessary to once remove the hanging metal fitting 103 from the receiving portion 104a. The support state at the lower receiving portion 104a is the cooling state at the time of cooling, and the upper receiving portion 104a. Since the support state corresponds to the blowing state during heating, the cone 102 is moved up and down with respect to the outlet body 101 and rotated each time switching from cooling to heating and from heating to cooling. It is necessary to remove the hanging bracket 103 from the receiving portion 104a and attach it to another receiving portion 104a, making it difficult to perform the operation quickly and accurately. Ku, there is a problem that time and effort it takes.

  Further, during such work, the blade body 102a of the middle cone 102 and the inside of the outlet body 101 are likely to come into contact. Particularly, in the case of a rectangular outlet, the corner of the blade body 102a is the inner periphery of the outlet body 101. There was a problem that the risk of damaging the surface by contacting or colliding with the surface and impairing the aesthetic appearance of the air outlet device 100 was extremely high.

  The present invention has been made in order to solve the above-mentioned problems, and it is possible to easily and quickly change the vertical position of the airflow guiding means by optimizing the mounting state of the airflow guiding means on the outlet body, and to change the airflow blowing state. An object of the present invention is to provide an airflow direction switching mechanism of an air outlet device that can be smoothly switched to realize appropriate air conditioning.

  The air flow direction switching mechanism according to the present invention is supplied with air conditioning gas, and has a substantially cylindrical outlet body having an opening region that directs the air conditioning gas toward the space to be air conditioned. An air flow guide means disposed in an opening region of the air outlet body and guiding the air conditioning gas in a predetermined blowing direction, and changing the position of the air flow guide means relative to the air outlet body to change the air conditioning gas. In a blowout device that can be selectively blown out in a plurality of blowout patterns, the airflow guide means can be positioned within a predetermined movable range with respect to the blowout body by being interposed between the blowout body and the airflow guide means. In the airflow direction switching mechanism that is held at a plurality of positions, a plurality of support pin portions that are arranged to project inward from the plurality of locations on the inner peripheral side of the outlet body, and the support pin portions are detachable. A plurality of recesses are formed side by side, and the recesses Are arranged on the outer peripheral portion of the airflow guide means so that they are parallel to the tube axis direction of the airflow outlet body in the arrangement state in the airflow outlet body of the airflow guide means. A plurality of pin receiving portions that are movable in a predetermined range parallel to the protruding direction of the pin portion and biased in a direction to approach the inner peripheral surface side of the outlet body, and the supporting pin portion includes The air flow guide means is held in the air outlet main body via the pin receiving portion and the supporting pin by being fitted into any one of the concave portions of the pin receiving portion.

  As described above, according to the present invention, the pin receiving portion provided with a plurality of recesses on the airflow guide means side is biased toward the support pin portion protruding inward from the air outlet body in a direction approaching the inner surface of the air outlet body. The airflow guide means is attached to the outlet body by fitting the supporting pin portion and the concave portion of the pin receiving portion so that the air outlet guide body is attached to any one of the cylinder axial directions with respect to the outlet body. When the airflow guide means is moved with a slightly strong force, the supporting pin is displaced from the concave portion of the pin receiving portion while the energized pin receiving portion is retracted, and is newly fitted into another concave portion. It is easy to obtain a state in which the positional relationship between the air outlet and the air outlet body is changed, and any operator can select and select an appropriate air outlet state according to the air conditioning situation with a simple operation. Can be increased.

  In addition, the airflow direction switching mechanism according to the present invention is formed as a substantially cylindrical body with a predetermined side surface partially opened as necessary, and each recess of the pin receiving portion and the region between the recesses are A plurality of holder portions are provided in the outer peripheral portion of the airflow guide means that are accommodated in a movable state while being positioned in the open portion of the side surface, and the holder portion is one of the concave portions in the pin receiving portion. A portion corresponding to the side is cut out, and the support pin portion can be inserted into and removed from the recess from the side through the cut-out portion.

  Thus, according to this invention, the holder part which accommodates a pin receiving part is provided, The holder part which faces the recessed part of a pin receiving part, and the part pinched | interposed between these recessed parts in the relative movable range of a support pin part The tip of the support pin stays in the holder part even if the support pin part is detached from the recess by restraining the support pin part so that the support pin part does not reach further outside. The support state of the airflow guide means is maintained, the airflow guide means is not released during the position adjustment process, and it is possible to avoid dangers such as dropping even if the operator accidentally releases his hand during adjustment work. In addition, unnecessary movement of the pin receiving portion can be suppressed by the holder portion, and the support pin portion and the concave portion of the pin receiving portion can always be fitted and removed under a certain condition, and a smooth mounting operation is possible.

  Further, the airflow direction switching mechanism according to the present invention protrudes laterally beyond the notch part from the pin receiving part side part facing the notch part of the holder part as necessary, and on the front side of the recess part. The guide surface is provided with a pin introduction guide that is formed into a curved or flat guide surface that retreats toward the center of the air flow guide means as the continuous surface is directed toward the protruding tip.

  As described above, according to the present invention, the pin introduction guide that protrudes to the side of the concave portion of the pin receiving portion is disposed, and when the air outlet guide body of the airflow guide means is mounted, the airflow guide means toward the protruding front end of the pin introduction guide. By relatively moving the support pin along the guide surface that is closer to the center and guiding it to the recess, it is possible to easily engage the support pin with the recess without requiring a strong force. The airflow guide means can be attached more smoothly, and an excessive force is not applied to each of the pin receiving portion and the supporting pin portion at the time of attachment, so that damage is unlikely to occur and durability is improved.

  Hereinafter, an airflow direction switching mechanism according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a schematic configuration cross-sectional view and a partially omitted bottom view of an air outlet apparatus using an airflow direction switching mechanism according to the present embodiment, and FIG. 2 is a cross-sectional view and a longitudinal section of the airflow direction switching mechanism according to the present embodiment. FIG. 3 is an explanatory view of a middle cone attachment process by the airflow direction switching mechanism according to the present embodiment, and FIG. 4 is a process of adjusting the vertical position of the middle cone by the airflow direction switching mechanism according to the present embodiment. FIG. 5 is an explanatory diagram of the arrangement of the air flow direction switching mechanism according to the present embodiment in the horizontal air blowing state, and FIG. 6 is an explanatory diagram of the arrangement of the air flow direction switching mechanism according to the present embodiment in the vertical air blowing state. It is.

  In each of the drawings, the airflow direction switching mechanism 1 according to the present embodiment includes an air outlet main body 10 in the multilayer cone type air outlet device 40 including the air outlet main body 10 and a middle cone 20 as the airflow guiding means. It is arrange | positioned between the cones 20, and supports the inside cone 20 so that a predetermined range movement is possible inside the blower outlet main body 10. FIG.

  The air outlet body 10 constituting the air outlet device 40 is disposed in the ceiling 50, is connected to the duct 51 and is supplied with conditioned air, and is expanded toward the indoor space side. The outer cone portion 12 has a shape, and an edge portion 13 is formed at the lower end of the outer cone portion 12 so as to stand perpendicular to the opening surface. The middle cone 20 is formed by overlapping and integrating a plurality of cone-shaped blade bodies 21 having different sizes so as to coincide with each other at a predetermined interval, and through the airflow direction switching mechanism 1. It is the structure arrange | positioned in the opening area center of the blower outlet main body 10. FIG.

  The airflow direction switching mechanism 1 includes one that is attached to the inner peripheral side of the outlet body 10 and one that is attached to the outer peripheral side of the middle cone 20. In this configuration, a plurality of supporting pin portions 14 are provided so as to protrude inward from the plurality of locations at equal intervals on the inner peripheral side of the outlet body 10.

  On the other hand, the airflow direction switching mechanism 1 that is attached to the outer peripheral side of the middle cone 20 is formed of a substantially cylindrical body whose side surface is partially opened, and the open portion of the side surface is the center of the middle cone 20. A plurality of holder portions 22 that are integrally disposed with the middle cone 20 at equal intervals in the circumferential direction so as to correspond to the support pin portions 14 while being positioned on the outermost peripheral side, and the tips of the support pin portions 14 can be fitted and removed. Two concave portions 24 arranged in the vertical direction, movable in a predetermined range parallel to the projecting direction of the support pin portion 14 with respect to the holder portion 22 and urged by a spring 26 toward the outside of the middle cone 20; And a pin receiving portion 23 accommodated in the holder portion 22. By fitting the concave portion 24 of the pin receiving portion 23 and the supporting pin portion 14 constituting the airflow switching mechanism so that the pin receiving portion 23 in each holder portion 22 is engaged with the supporting pin portion 14. The cone 20 is a mechanism that is held in the outlet body 10 so that the position thereof can be adjusted. The fitting state between the concave portion 24 of the pin receiving portion 23 and the supporting pin portion 14 is securely held by the urging by the spring 26, and the fitting does not come off due to the weight of the middle cone 20 and falls. When an operator applies an operation force that pushes up or pulls down the middle cone 20, the position can be easily adjusted by fitting / removing.

  The holder portion 22 accommodates and supports the pin receiving portion 23 in a state where each concave portion 24 of the pin receiving portion 23 and the region between the concave portions 24 are located in the open portion of the side surface, and the lower portion of the pin receiving portion 23 A portion corresponding to the side of the concave portion 24 is cut out, and the cut portion is an introduction port for the support pin portion 14 to move from the side toward the concave portion 24 (FIG. 2 ( C)).

  Further, the pin receiving portion 23 protrudes laterally from the side of the pin receiving portion 23 on the side of the lower recessed portion 24 facing the notched portion of the holder portion 22, beyond the notched portion, and on the front side of the recessed portion 24. A pin introduction guide 25 formed as a planar guide surface 25a that retreats toward the center side of the middle cone 20 and moves away from the inner peripheral surface of the blower outlet body 10 as the continuous surface toward the projecting tip side is integrally disposed. (See FIGS. 2A and 2C). Of the pin receiving portion 23, only this pin introduction guide 25 is in a state of protruding to the outside of the holder portion 22. The guide surface 25a of the pin introduction guide 25 is not limited to a planar shape, and may be a curved surface that gradually curves toward the center of the middle cone 20 toward the protruding tip side.

  Next, the middle cone attachment and the air flow blowing state adjusting operation in the air outlet device when the air flow direction switching mechanism based on the above configuration is used will be described. First, the middle cone 20 is attached to the outlet main body so that the support pin portion 14 is positioned on the pin introduction guide 25 side of the pin receiving portion 23 forming the air flow direction switching mechanism outside the middle cone 20. Insert into 10 open areas. When the middle cone 20 is inserted until the pin introduction guide 25 of the pin receiving portion 23 and the support pin portion 14 are at the same height, the middle cone 20 is rotated and the pin introduction guide 25 is moved to the support pin portion 14. Contact is made (see FIG. 3A). When the middle cone 20 is rotated as it is in the same direction, the pin introduction guide 25 is pushed by the tip of the support pin portion 14 to shift the pin receiving portion 23 toward the center of the opening region (see FIG. 3B). The rotation of the entire middle cone 20 is not restricted.

  As it is, the tip of the support pin portion 14 is changed from the pin introduction guide 25 to the portion in the holder portion 22 of the pin receiving portion 23 (see FIG. 3C), and further to the lower recess 24 in the pin receiving portion 23. When the middle cone 20 is rotated until the fitting relationship is reached, the state in which the support pin portion 14 is fitted in the recess 24 is maintained by the urging of the pin receiving portion 23 by the spring 26. The middle cone 20 is supported in the outlet body 10. Since the pin introduction guide 25 is provided to facilitate the entry and fitting of the support pin portion 14 into the concave portion 24 of the pin receiving portion 23 from the lateral direction, the middle cone mounting operation can be performed smoothly and the pin receiving portion Unreasonable force is not applied to each of the portion 23 and the support pin portion 14, and it is difficult to break.

  When removing the middle cone 20, if the middle cone 20 is rotated in the opposite direction to that of the attachment, the recess 24 of the pin receiving portion 23 is displaced from the state of being fitted to the support pin portion 14, and the support pin portion 14 completely separates from the pin receiving portion 23 while pressing the pin introducing guide 25 of the pin receiving portion 23. Thus, the vertical restraint by the pin receiving part 23 and the holder part 22 is eliminated, and the middle cone 20 can be removed from the outlet body 10.

  Next, the airflow blowing state switching operation will be described. The conditioned air sent from the duct 51 travels downward in the air outlet body 10 and enters the region between the air outlet body 10 and the middle cone 20 and between the blade bodies 21 forming the middle cone 20. The air flow of conditioned air is guided to the middle cone 20 and the like while passing through these, and the traveling direction is changed to the horizontal direction. After passing between the blade bodies 12, from between the blade bodies 12 to the outlet body 10 from the indoor side opening. The airflow that comes out is blown directly into the room. The blown-out airflow attracts room air and proceeds and diffuses while mixing.

  The state of the airflow blown out from the outlet body 10 varies depending on the position of the middle cone 20. That is, when the supporting pin portion 14 is fitted into the lower recess 24 of the pin receiving portion 23 and the position of the middle cone 20 is further upward, the conditioned air flow is guided to the edge portion 13 of the outlet body 10. The traveling direction is changed at the edge portion 13 so that a downward velocity component is applied, and the airflow proceeds vertically downward from the air outlet to the indoor space. Further, when the support pin portion 14 is fitted into the upper recess 24 of the pin receiving portion 23 and the position of the middle cone 20 is further lowered, the conditioned air stream flows along the shallow inclined blade body 12. In the state where the lateral velocity component is increased, the air is blown out almost horizontally from the outlet body 10 to the indoor space.

  When such a conditioned air blowing pattern is changed from one to the other, an operator pushes up or pulls down the middle cone 20 supported in the blower outlet body 10 and fits into one recess 24. If the support pin portion 14 is moved relative to the other recess 24 over the intermediate portion between the recesses 24 and the support pin portion 14 is fitted into the recess 24 different from the front of the pin receiving portion 23 ( 4), the middle cone 20 is positioned at a position different from the previous position with respect to the outlet body 10, and the blowing pattern can be changed. At the time of adjusting the vertical position of the middle cone 20, the support pin portion 14 is in a state in which only the open portion of the holder portion 22 can be moved relatively, and even if the operator accidentally releases the hand from the middle cone 20. The support pin portion 14 stays in the open portion of the holder portion 22 and continues to hold the middle cone 20, and can prevent the middle cone 20 from falling.

  As an actual work, in the case of cooling where the temperature of the conditioned air is low, the middle cone 20 is pulled down as necessary, and the support pin portion 14 is engaged with the upper recessed portion 24 of the pin receiving portion 23 (FIG. 4 ( C)), a lower position (see FIG. 5) where the lower edge heights of the middle cone 20 and the outlet body 10 substantially coincide with each other. In this case, the air flow of the conditioned air flows along the middle cone 20 and the outer cone 12 and blows and diffuses almost directly from the air outlet device 40 to the indoor space, and is heavier than the air in the indoor space at a low temperature. The air can be diffused widely in the indoor space without being immediately lowered, and mixing with the air in the indoor space can be promoted, and the temperature of the indoor space can be reduced efficiently and uniformly.

  On the other hand, in the case of heating in which the temperature of the conditioned air is high, the middle cone 20 is pushed up as necessary, and the support pin portion 14 is engaged with the lower recess 24 of the pin receiving portion 23 (see FIG. 4A). As shown in FIG. 6, the lower edge of the middle cone 20 is set at an upper position (see FIG. 6) where it is substantially the same height as the upper end of the edge 13 of the outlet body 10. In this case, the conditioned air flows in a state where the air travels in the state of changing vertically in the downward direction by hitting the rising edge portion 13 of the outlet body 10 after traveling sideways along the middle cone 20 and the outer cone portion 12. put out. In this way, the air flow of the conditioned air proceeds downward from the air outlet device 40 to the indoor space, so that the conditioned air that is warmer and lighter than the air in the indoor space can be surely reached the living area below the indoor space, and the entire indoor space can be warmed. The air conditioning effect can be greatly improved.

  As described above, in the airflow direction switching mechanism according to the present embodiment, the pin receiving portion 23 including the plurality of concave portions 24 on the middle cone 20 side with respect to the supporting pin portion 14 protruding inward from the outlet body 10 is provided. The middle cone 20 is attached to the outlet body 10 by being arranged while being biased toward the inner surface of the outlet body 10 and fitting the support pin portion 14 and the recess 24 of the pin receiving portion 23. In addition, when the middle cone 20 is moved with respect to the outlet body 10 in any one of the cylinder axial directions with a slightly strong force, the supporting pin portion 14 is moved while the urged pin receiving portion 23 is retracted. Since the pin receiving portion 23 is displaced from the concave portion 24 and is newly fitted into another concave portion 24, a state in which the positional relationship of the middle cone 20 with respect to the outlet body 10 is changed can be easily obtained. The desired blowing state is obtained, You can also adjust select an appropriate blowing conditions in accordance with the air conditioning availability worker, such as, it is possible to enhance the air conditioning effect by the air outlet device 40. .

It is a schematic structure sectional view and a partially omitted bottom view of a blower outlet device using an air flow direction switching mechanism according to an embodiment of the present invention. It is the cross-sectional view and longitudinal cross-sectional view of the airflow direction switching mechanism which concern on one embodiment of this invention, and the side view on the outer peripheral side. It is a middle cone attachment process explanatory drawing by the airflow direction switching mechanism which concerns on one embodiment of this invention. It is middle cone top-and-bottom position adjustment process explanatory drawing by the airflow direction switching mechanism which concerns on one embodiment of this invention. It is arrangement | positioning explanatory drawing in the airflow horizontal blowing state of the airflow direction switching mechanism which concerns on one embodiment of this invention. It is arrangement | positioning explanatory drawing in the airflow vertical blowing state of the airflow direction switching mechanism which concerns on one embodiment of this invention. It is schematic structure sectional drawing of the blower outlet apparatus using the conventional airflow direction switching mechanism. It is a middle cone attachment process explanatory drawing by the conventional airflow direction switching mechanism.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Airflow direction switching mechanism 10, 101 Air outlet main body 11, 101a Neck part 12, 101b Outer cone part 13, 101c Edge part 14 Supporting pin part 20, 102 Middle cone 21, 102a Blade body 22 Holder part 23 Pin receiving part 24 Concave portion 25 Pin introduction guide 25a Guide surface 26 Spring 40, 100 Outlet device 50 Ceiling 51 Duct 103 Hanging metal fitting 104 Double step metal fitting 104a Receiving portion

Claims (3)

An air conditioner gas is supplied, and the air conditioner gas is disposed in an opening area of the substantially cylindrical air outlet body having an opening area for directing the air conditioning gas toward the space to be air conditioned. An air flow guide means for guiding the air conditioning gas in a predetermined blowing direction, and the air conditioning gas can be selectively blown out in a plurality of blowing patterns by changing the position of the air flow guiding means with respect to the outlet body. In the air outlet device, in the air flow direction switching mechanism that is interposed between the air outlet main body and the air flow guide means and holds the air flow guide means relative to the air outlet main body within a predetermined movable range.
A plurality of support pin portions disposed to project inward from the plurality of locations on the inner peripheral side of the outlet body, and
A plurality of recesses into which the supporting pin part can be fitted and removed are formed side by side, and the direction in which the recesses are arranged is parallel to the cylinder axis direction of the air outlet body in the arrangement state in the air outlet body of the air flow guide means. A plurality of arrangements on the outer periphery of the guide means, a state that is movable within a predetermined range in parallel to the protruding direction of the support pin portion with respect to the airflow guide means, and is biased in a direction to approach the inner peripheral surface side of the outlet body A plurality of pin receivers,
The support pin portion is fitted into any one of the recesses of the pin receiving portion, and the air flow guide means is held in the outlet body through the pin receiving portion and the support pin. Direction switching mechanism. In the airflow direction switching mechanism according to claim 1,
It is formed of a substantially cylindrical body whose predetermined side surface is partially opened, and the pin receiving portion is accommodated in a movable state while each concave portion of the pin receiving portion and the region between the concave portions are located in the open portion of the side surface. A plurality of holder portions disposed on the outer periphery of the airflow guide means,
The holder portion is cut out at a portion corresponding to the side of any of the recesses in the pin receiving portion, and the support pin portion can be inserted into and removed from the recess from the side by passing through the notch portion. A featured airflow direction switching mechanism. In the airflow direction switching mechanism according to claim 2,
The side of the pin receiving part facing the notch part of the holder part protrudes laterally beyond the notch part, and toward the center of the airflow guide means as the surface connected to the front side of the recess is directed toward the projecting tip side. An airflow direction switching mechanism comprising a pin introduction guide that is formed as a curved curved surface or a flat guide surface and is integrally formed with a pin receiving portion.

Images