Air blower device

Abstract

To provide an air blower device which can make abnormal noise, such as wind noise, and a draft less likely to be generated when a ventilation flue is closed.SOLUTION: An air blower device (1) of the invention is provided with an exhaust structure in which a ventilation flue of a case body (10) is opened or closed by rotation of a rotary member (30) and air in the case body (10) is exhausted when the ventilation flue is closed. The exhaust structure has: an exhaust hole (12) and a lap area (13) provided at the case body (10); and a slide contact part (34) provided at the rotary member (30). The exhaust hole (12) is disposed in the lap area (13). A non-contact surface (14) which does not contact with the slide contact part (34) of the lap area (13) is displaced by rotation of the rotary member (30). The exhaust hole (12) is opened or closed by displacement of the non-contact surface (14).SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an air blowing device that can be switched between an open state in which air is blown out from an outlet and a closed state in which air blowing is stopped. [Background technology]

[0002] Japanese Patent Application Laid-Open Publication No. 2020-131963 (Patent Document 1) describes a vehicle airflow direction adjustment device (vehicle register) that blows air into the passenger compartment of an automobile. The airflow direction adjustment device in Patent Document 1 has a retainer that forms an air outlet and multiple barrels that are rotatably arranged within the retainer, and by rotating the barrels, the direction of the air blown out from the air outlet of the retainer can be adjusted.

[0003] Furthermore, the airflow direction adjustment device of Patent Document 1 has a function in which the multiple barrels are rotated to shut off and close the airflow passage of the retainer. A structure in which multiple barrels close the airflow passage in this way is generally called a fin shut structure or a louver shut structure. An airflow direction adjustment device with such a fin shut structure does not require a dedicated structure for shutting off the airflow passage of the retainer, thereby reducing the number of parts in the airflow direction adjustment device and reducing costs. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2020-131963 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in a wind direction adjustment device equipped with a fin shut structure such as that in Patent Document 1, although the ventilation passage can be closed with multiple rotatably arranged fins (barrels), when the ventilation passage is closed with the fins, the internal pressure within the ventilation passage increases, causing air to leak between the fins, resulting in problems such as the generation of strange noises such as wind noise and the user feeling a draft.

[0006] The present invention has been made in consideration of the above-mentioned conventional problems, and its purpose is to provide an air blowing device that blows air from an outlet and that is able to reduce the generation of abnormal noises such as wind noise and drafts when the ventilation passage is closed. [Means for solving the problem]

[0007] In order to achieve the above object, the air blowing device provided by the present invention is an air blowing device having a case body having an air passage provided therein for circulating air, and at least one rotating member rotatably arranged on the case body, wherein the air passage of the case body is opened and closed by the rotation of the rotating member, and an exhaust structure is provided for discharging air from inside the case body when the ventilation passage is closed by the rotating member, the exhaust structure has an exhaust hole provided on the case body, a wrap area set on the case body centered on the rotation center of the rotating member, and a sliding contact part provided on the rotating member and in sliding contact with the wrap area, the exhaust hole is arranged within the wrap area, the wrap area has a non-contact surface that does not come into contact with the sliding contact part, the non-contact surface is displaced by the rotation of the rotating member, and the exhaust hole is opened and closed by the displacement of the non-contact surface.

[0008] In the air blowing device of the present invention, it is preferable that the exhaust structure is formed so as to open the exhaust hole when the rotating member rotates to a closing position where the ventilation passage is closed. Furthermore, it is preferable that the sliding portion has a sliding main body portion having an elliptical cross section perpendicular to the rotational axis direction of the rotating member, and that the sliding portion is provided with an exhaust prevention structure that prevents the air from being discharged from the exhaust hole when the ventilation passage is opened by the rotating member. [Effects of the Invention]

[0009] According to the air blowing device of the present invention, when the ventilation passage is closed, it is possible to make it difficult for abnormal noises such as wind noise and drafts to occur. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a perspective view schematically showing an air blowing device according to an embodiment of the present invention. [Figure 2] 2 is a schematic diagram showing a rotating member (vertical fin) disposed in the air blowing device shown in FIG. 1. FIG. [Figure 3] 10 is an explanatory diagram illustrating a schematic view of the exhaust structure when a rotating member of the air blowing device is held in a neutral position. FIG. [Figure 4] 10 is an explanatory diagram illustrating a schematic view of the exhaust structure when the rotating member of the air blowing device directs the airflow direction to the far left. FIG. [Figure 5] 10 is an explanatory diagram illustrating a schematic view of the exhaust structure when the rotating member of the air blowing device closes the ventilation passage. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. Fig. 1 is a perspective view showing a schematic view of the air blowing device of this embodiment, and Fig. 2 is a schematic view showing the vertical fin of this embodiment.

[0012] The air blowing device 1 of this embodiment shown in Fig. 1 is attached to an interior member (not shown) such as an instrument panel or a center console in the passenger compartment of an automobile. By connecting this air blowing device 1 to an air conditioning device (not shown) installed in the vehicle, it is possible to blow air whose temperature has been adjusted by the air conditioning device into the passenger compartment. In addition, the air blowing device 1 is formed as an air direction adjusting device 1 that can adjust the direction of air blown into the passenger compartment from an air outlet 11 of the air blowing device 1 at least in the left-right direction by rotating a rotating member (vertical fins 30) described below.

[0013] Here, with regard to the air blowing device 1, the front-to-rear direction is the direction along the flow direction of air that flows through the case body 10 of the air blowing device 1 when horizontal fins 20 and vertical fins 30, which will be described later, are both held in neutral positions (horizontal or vertical positions). In this case, the downstream side of the air flow is the front, and the upstream side is the rear.

[0014] The up-down direction and the left-right direction are respectively the vertical direction (height direction) and horizontal direction (width direction) when the air blowing device 1 is viewed from the side of its air outlet 11. The neutral position of the horizontal fins 20 and the neutral position of the vertical fins 30 refer to positions where the horizontal fins 20 and the vertical fins 30 are held so that the first and second main surfaces of the horizontal fins 20 and the vertical fins 30 are aligned with the flow (front-back direction) of air supplied to the airflow direction adjustment device 1.

[0015] The airflow direction adjustment device (air blowing device) 1 of this embodiment has a cylindrical case body 10 with an internal ventilation passage for circulating air therein, a plurality of horizontal fins 20 arranged at the end of the case body 10 on the air outlet 11 side, a plurality of vertical fins 30 arranged upstream of the horizontal fins 20, and an operation knob 40 that is operated when rotating the horizontal fins 20 and the vertical fins 30. The airflow direction adjustment device 1 also has a first link member (not shown) that connects the plurality of horizontal fins 20 and links the rotation of the horizontal fins 20 to one another, and a second link member (not shown) that connects the plurality of vertical fins 30 and links the rotation of the vertical fins 30 to one another.

[0016] In the airflow direction adjustment device 1 of this embodiment, the multiple vertical fins 30 are provided as rotating members that rotate to be able to open and close the ventilation passage of the case body 10. This airflow direction adjustment device 1 has a fin shut structure in which the multiple vertical fins 30, which are rotating members, can close the ventilation passage of the case body 10.

[0017] In this embodiment, the case body 10 is installed on the rear side of an interior member such as an instrument panel in an automobile. The rear end of the case body 10 is connected to a duct (not shown) that supplies air temperature-adjusted by an air conditioning device. The case body 10 is formed in a generally rectangular cylindrical shape, and a ventilation passage for circulating air is formed inside the case body 10 along the front-to-rear direction. The generally rectangular cylindrical case body 10 has an upper wall portion, a lower wall portion, a left side wall portion, and a right side wall portion that surround the ventilation passage.

[0018] An air outlet 11 for blowing air into the vehicle cabin is provided at the front end (downstream end) of the case body 10. The air outlet 11 of the case body 10 is formed in a substantially rectangular shape that is long in the left-right direction when the airflow direction adjustment device 1 is viewed from the front side.

[0019] A plurality of horizontal fins 20 made of synthetic resin are rotatably attached within the front end of the case body 10. In this embodiment, three horizontal fins 20 that are long in the left-right direction are arranged parallel to each other with intervals in the up-down direction. The three horizontal fins 20 are formed to be substantially the same shape and size as each other.

[0020] Each horizontal fin 20 has a thin plate-shaped horizontal fin main body 21, a pair of left and right rotation shafts (not shown) that protrude outward in the left-right direction from the left and right side edges of the horizontal fin main body 21, and a first link shaft (not shown) that protrudes from the left or right edge of the horizontal fin main body 21 and is connected to a first link member.

[0021] A plurality of first shaft holders (not shown) that hold the left and right rotating shafts of each horizontal fin 20 are provided on the left and right side walls of the case body 10, respectively, corresponding to the positions of the horizontal fins 20. Each horizontal fin 20 is attached so that it can rotate up and down by inserting and holding the left and right rotating shafts of each horizontal fin 20 into the first shaft holders provided on the left and right side walls of the case body 10. By changing the orientation of these three horizontal fins 20 up and down, it is possible to adjust the flow of air blown out from the airflow direction adjustment device 1 up and down.

[0022] The three horizontal fins 20 are connected by a first link member (not shown) so that the rotations of the horizontal fins 20 are linked to one another. An operation knob 40 is attached to the middle horizontal fin 20 of the three horizontal fins 20 so as to be slidable in the left-right direction.

[0023] In the present invention, the shape, size, number, and location of the horizontal fins 20, as well as the connecting structure with the first link member, are not particularly limited. The horizontal fins 20 may be fixed to the case body 10 so as not to rotate. The shape, size, and structure of the first link member connecting the three horizontal fins 20 and the operation knob 40 are also not particularly limited.

[0024] A plurality of vertical fins 30 made of synthetic resin are rotatably attached to the case body 10 on the upstream side (rear side) of the horizontal fins 20 as rotating members that can open and close the ventilation passage of the case body 10. In this embodiment, six vertical fins 30 are arranged along the vertical direction and are arranged parallel to each other with intervals in the left-right direction. Each vertical fin 30 is arranged to be rotatable in the left-right direction within a range from a first rotation limit position where the airflow direction is directed to the leftmost side to a second rotation limit position (closed position) where the ventilation passage of the case body 10 is closed.

[0025] As shown in FIG. 2, each of the vertical fins 30 has a thin plate-shaped vertical fin main body 31, a pair of upper and lower rotation shaft portions 32 that protrude outward in the vertical direction from the upper edge and lower end of the vertical fin main body 31, and one second link shaft portion 33 that protrudes from the upper end (or lower end) of the vertical fin main body 31 and is connected to a second link member.

[0026] A plurality of second shaft holding portions (not shown) that hold the upper and lower rotation shaft portions 32 provided on each vertical fin 30 are provided on the upper and lower wall portions of the case body 10, corresponding to the positions of the vertical fins 30. Each vertical fin 30 is attached so as to be rotatable in the left-right direction by inserting and holding the upper and lower rotation shaft portions 32 of each vertical fin 30 into the second shaft holding portions provided on the upper and lower wall portions of the case body 10. The six vertical fins 30 are connected by second link members (not shown) so that the rotations of the vertical fins 30 are linked to each other.

[0027] One of the plurality of vertical fins 30 is provided with a knob connecting structure (not shown) that connects to the operation knob 40. One of the plurality of vertical fins 30 is provided with a sliding contact portion 34 that forms an exhaust structure described below (see FIG. 2). In the present invention, it is not particularly limited which of the plurality of vertical fins 30 the knob connecting structure and / or the sliding contact portion 34 is provided on. Furthermore, the knob connecting structure and the sliding contact portion 34 may be provided on the same vertical fin 30. In the following description, the vertical fin 30 that is provided with the sliding contact portion 34 is referred to as an exhaust control fin 30a.

[0028] As described above, the airflow direction adjustment device 1 of this embodiment has a fin shut structure, and by rotating the multiple vertical fins 30, it can be switched between an open state in which air is blown out from the airflow direction adjustment device 1 and a closed state in which the ventilation passage inside the case body 10 is closed to stop air from being blown out from the airflow direction adjustment device 1.

[0029] When the airflow direction adjustment device 1 is in an open state, the direction of the six vertical fins 30 can be changed left and right to adjust the flow of air blown out from the airflow direction adjustment device 1 left and right. When the airflow direction adjustment device 1 is in a closed state, adjacent vertical fins 30 in the left and right direction at least partially overlap each other, and the multiple vertical fins 30 come into contact with the inner wall surfaces of the upper wall portion, lower wall portion, left side wall portion, and right side wall portion of the case body 10, thereby stopping the flow of air in the ventilation channel.

[0030] The airflow direction adjustment device 1 of this embodiment is provided with an exhaust structure that, when in a closed state in which the ventilation passage within the case body 10 is closed by the multiple vertical fins 30, exhausts the air within the case body 10 to the outside of the case body 10 rather than through the air outlet 11 of the case body 10.

[0031] 2 and 3, the exhaust structure of the airflow direction adjustment device 1 has exhaust holes 12 provided in the case body 10, a wrap area 13 set in the case body 10 around the rotation center C of the exhaust control fin 30a, and a sliding contact portion 34 provided at the lower end of the exhaust control fin 30a and in sliding contact with the wrap area 13. This exhaust structure is formed so as to open the exhaust holes 12 when the exhaust control fin 30a rotates to a second rotation limit position (closed position) that closes the ventilation passage of the case body 10.

[0032] The sliding contact portion 34 has a sliding contact main body portion 35 whose cross section perpendicular to the rotational axis direction of the exhaust control fin 30a is elliptical, and an exhaust prevention portion 36 formed integrally with the sliding contact main body portion 35. The sliding contact main body portion 35 is formed so as to include within its interior the axial center C of the rotational shaft portion 32 of the exhaust control fin 30a (preferably the entire rotational shaft portion 32) in a cross-sectional view of the sliding contact portion 34 perpendicular to the rotational axis direction. Note that in the present invention, the elliptical cross-sectional shape of the sliding contact main body portion 35 includes not only an elliptical shape but also shapes close to an ellipse, such as an oval.

[0033] The exhaust hole 12 of the exhaust structure is provided in the lower wall of the case body 10 and penetrates from the inner wall surface to the outer wall surface of the lower wall. The exhaust hole 12 is formed so that the cross section perpendicular to the penetration direction is circular. As shown in FIG. 3, the exhaust hole 12 is disposed within a wrap region 13 of the exhaust structure. Note that in the present invention, the shape and size of the exhaust hole 12 are not particularly limited.

[0034] The lap region 13 of the exhaust structure is a virtual region provided on the inner wall surface of the lower wall of the case body 10 as a region including the portion where at least a part of the sliding contact portion 34 of the exhaust control fin 30a comes into contact with the case body 10. In this embodiment, the lap region 13 of the case body 10 has a circular shape centered on the axial center C of the rotation shaft portion 32 of the exhaust control fin 30a when the inner wall surface of the lower wall of the case body 10 is viewed from above. The lower surfaces of the sliding contact portions 34 of the exhaust control fin 30a come into contact with this lap region 13. Note that the lap region 13 may be formed in a fan shape centered on the axial center C of the rotation shaft portion 32 of the vertical fin 30 when the inner wall surface of the lower wall of the case body 10 is viewed from above.

[0035] Here, for example, in a cross-sectional view perpendicular to the rotational axis direction of the exhaust control fin 30a, the dimension at the longest point from the axial center (rotation center) C of the exhaust control fin 30a to the outer peripheral surface of the sliding body portion 35 of the sliding contact portion 34 is defined as the semi-major axis dimension D. In this case, it is preferable that the wrap region 13 is formed in a circular shape with a radius that is at least half the semi-major axis dimension D of the sliding contact portion 34 and is not more than the semi-major axis dimension D.

[0036] The sliding contact portion 34 of the exhaust structure is provided at the lower end of the exhaust control fin 30a. The sliding contact portion 34 is rotatable around the rotation shaft portion 32 of the exhaust control fin 30a, from a first rotation limit position where the vertical fin 30 directs the airflow direction to the far left, to a second rotation limit position where the ventilation passage of the case body 10 is closed, corresponding to the rotation range of the exhaust control fin 30a.

[0037] 3 shows the position of the sliding contact portion 34 when the exhaust control fin 30a is held in the neutral position. Figures 4 and 5 show the positions of the sliding contact portion 34 when the exhaust control fin 30a is held in the first rotation limit position (the position where the airflow direction is directed to the leftmost side) and when the exhaust control fin 30a is held in the second rotation limit position (the position where the ventilation passage of the case body 10 is closed), respectively.

[0038] The sliding contact portion 34 is provided with an exhaust prevention structure that prevents exhaust from the exhaust hole 12 when the ventilation passage of the case body 10 is open, specifically when the multiple vertical fins 30 are held in a position other than the second rotation limit position that closes the ventilation passage of the case body 10 or when they are rotating within a range other than the second rotation limit position.

[0039] In this embodiment, the exhaust prevention structure is formed by the sliding main body portion 35 and the exhaust prevention portion 36 of the sliding portion 34. The sliding main body portion 35 and the exhaust prevention portion 36 can cover and close the exhaust hole 12 of the case body 10 from the inner wall surface side of the case body 10 when the multiple vertical fins 30 open the ventilation passage.

[0040] In a cross-sectional view perpendicular to the rotational axis direction of the exhaust control fin 30a, the exhaust prevention portion 36 is provided so as to protrude from a part of the outer circumferential surface of the sliding main body portion 35 in the rotational direction of the sliding main body portion 35. For example, in the case where the vertical fin 30 is held in the neutral position, as shown in FIG. 3 , the exhaust prevention portion 36 is provided so as to extend from approximately the rear half of the right side surface of the sliding main body portion 35 in the clockwise direction in the rotational direction of the sliding main body portion 35.

[0041] In a cross-sectional view perpendicular to the rotation axis direction (for example, FIG. 3), the exhaust prevention portion 36 of this embodiment has a shape that forms, together with the sliding contact main body portion 35, a fan-shaped region centered on the axial center C of the exhaust control fin 30a. In this case, the exhaust prevention portion 36 is formed so that the arc portion of the fan-shaped region coincides with the circumference or arc of the wrap region 13.

[0042] The exhaust prevention portion 36 is formed so that the central angle of the sectorial region is between 90° and 130°. Because the central angle of the sector is 90° or more, the exhaust port can be stably covered by the exhaust prevention portion 36 of the sliding contact portion 34 when the multiple vertical fins 30 open the ventilation passage of the case body 10. Because the central angle of the sector is 130° or less, the exhaust prevention portion 36 of the sliding contact portion 34 does not overlap with the exhaust port when the vertical fins 30 are held in the second rotation limit position that closes the ventilation passage of the case body 10, and air within the case body 10 can be stably discharged through the exhaust hole 12.

[0043] In the exhaust structure of this embodiment, the wrap region 13 has a contact surface with which the sliding portion 34 of the exhaust control fin 30a (i.e., the sliding main body portion 35 and the exhaust prevention portion 36) comes into contact, and a non-contact surface 14 with which the sliding portion 34 does not come into contact. The contact surface and non-contact surface 14 in this wrap region 13 are each displaced within the wrap region 13 by the rotation of the exhaust control fin 30a.

[0044] For example, when the exhaust control fin 30a rotates from the neutral position toward the first rotation limit position described above, the non-contact surface 14 of the wrap region 13 displaces clockwise from the position shown in Fig. 3 to the position shown in Fig. 4. On the other hand, when the exhaust control fin 30a rotates from the neutral position toward the second rotation limit position described above, the non-contact surface 14 of the wrap region 13 displaces counterclockwise from the position shown in Fig. 3 to the position shown in Fig. 5. Similarly to the non-contact surface 14, the contact surface in the wrap region 13 also displaces within the wrap region 13 due to the rotation of the exhaust control fin 30a.

[0045] In this embodiment, at least the non-contact surface 14 of the wrap region 13 is displaced as described above in accordance with the rotation of the exhaust control fin 30a, thereby opening and closing the exhaust hole 12 provided in the lower wall of the case body 10. Specifically, when the multiple vertical fins 30 open the ventilation passage of the case body 10, for example, as in the case of Figure 3 where the multiple vertical fins 30 are held in a neutral position, or as in the case of Figure 4 where the multiple vertical fins 30 are held in a first rotation limit position, in a cross-sectional view perpendicular to the rotation axis direction of the exhaust control fin 30a, the sliding portion 34 (sliding main body portion 35 and exhaust prevention portion 36) of the exhaust control fin 30a is positioned to cover the exhaust hole 12 of the case body 10.

[0046] 3 and 4, the non-contact surface 14 of the wrap region 13 is positioned offset from the exhaust hole 12 of the case body 10, while the contact surface of the wrap region 13 is positioned so that at least a portion of the contact surface overlaps with the exhaust hole 12 of the case body 10. By positioning the non-contact surface 14 and the contact surface of the wrap region 13 relative to the exhaust hole 12 of the case body 10 in this manner, the exhaust hole 12 of the case body 10 is blocked by the sliding portion 34 of the exhaust control fin 30a, and therefore the air in the ventilation passage of the case body 10 is not discharged to the outside of the case body 10 through the exhaust hole 12.

[0047] On the other hand, in the case of Figure 5, for example, where the multiple vertical fins 30 are held at the second rotation limit position that closes the ventilation passage of the case body 10, in a cross-sectional view perpendicular to the rotation axis direction of the exhaust control fin 30a, the sliding portion 34 (sliding main body portion 35 and exhaust prevention portion 36) of the exhaust control fin 30a is positioned at a position offset from the exhaust hole 12 of the case body 10.

[0048] In this case, in the cross-sectional view, the non-contact surface 14 of the wrap area 13 is positioned so as to overlap the exhaust hole 12 of the case body 10, while the contact surface of the wrap area 13 is positioned so as to be offset from the exhaust hole 12 of the case body 10. By positioning the non-contact surface 14 and the contact surface of the wrap area 13 relative to the exhaust hole 12 of the case body 10 in this way, the exhaust hole 12 of the case body 10 is not blocked by the sliding portion 34 of the exhaust control fin 30a and opens to the ventilation passage of the case body 10, and air within the ventilation passage of the case body 10 is discharged to the outside of the case body 10 through the exhaust hole 12.

[0049] According to the airflow direction adjustment device 1 of this embodiment as described above, the direction of air blown out from the airflow direction adjustment device 1 can be adjusted in the left-right and up-down directions by rotating the vertical fins 30 and the horizontal fins 20. Furthermore, by rotating the vertical fins 30 to the second rotation limit position, the multiple vertical fins 30 close the ventilation passages in the case body 10, and the blowing of air out from the airflow direction adjustment device 1 can be stopped.

[0050] Furthermore, since the airflow direction control device 1 of this embodiment is provided with the above-mentioned exhaust structure, when the ventilation passage is closed by the multiple vertical fins 30, the exhaust holes 12 provided in the case body 10 open, and air inside the case body 10 can be exhausted from the exhaust holes 12 to the outside of the case body 10. This makes it possible to prevent or suppress an increase in internal pressure inside the case body 10, even if air temperature-adjusted by an air conditioner is supplied to the case body 10 through a duct when the ventilation passage of the airflow direction control device 1 is closed by the multiple vertical fins 30. Therefore, when the multiple vertical fins 30 stop the air from being blown out from the airflow direction control device 1, it is possible to prevent or suppress air leakage from between the vertical fins 30, making it less likely that abnormal noises such as wind noise or drafts will occur.

[0051] Furthermore, in the airflow direction control device 1 of this embodiment, when air is blown out from the airflow direction control device 1, the exhaust hole 12 of the case body 10 can be covered and blocked by the exhaust prevention structure (sliding contact main body portion 35 and exhaust prevention portion 36) provided on the exhaust control fin 30a. This prevents the air inside the case body 10 from being exhausted through the exhaust hole 12, preventing flow loss in the airflow direction control device 1. Therefore, air supplied from an air conditioner to the airflow direction control device 1 can be stably blown out from the air outlet 11 of the case body 10 into the passenger compartment of the automobile at an appropriate flow rate.

[0052] In other words, the airflow direction adjustment device 1 of this embodiment can eliminate the conventional problem of the pressure inside the case body 10 increasing when the ventilation passage is closed, without compromising the function and performance when the ventilation passage inside the case body 10 is open.

[0053] Furthermore, in the airflow direction adjustment device 1, the closing function of closing the ventilation passage of the case body 10 is simply realized by a plurality of vertical fins 30 that adjust the airflow direction, and the exhaust function of discharging air from inside the case body 10 when the ventilation passage is closed is simply realized by the exhaust holes 12 and lap area 13 of the case body 10 and the sliding contact portions 34 of the exhaust control fins 30a (vertical fins 30).

[0054] As described above, the airflow direction control device 1 of this embodiment uses the vertical fins 30, which are rotating members, to ensure the function of adjusting the airflow direction while simultaneously achieving the function of closing the ventilation passage and the function of exhausting air from the case body 10. This eliminates the need for a dedicated structure for closing the ventilation passage in the case body 10 or a complex structure for exhausting air when the ventilation passage is closed, thereby reducing the cost of the airflow direction control device 1 and improving assembly and productivity.

[0055] In particular, in the airflow direction adjusting device 1 of this embodiment, the sliding contact portions 34 of the exhaust control fins 30a do not cover the entire lap region 13 of the case body 10, and a non-contact surface 14 is provided where the sliding contact portions 34 do not come into contact with the lap region 13. Therefore, in the exhaust structure of the airflow direction adjusting device 1, the sliding contact portions 34 of the exhaust control fins 30a can be easily displaced relative to the lap region 13 in the rotational direction of the exhaust control fins 30a to easily and smoothly switch between closing and opening the exhaust holes 12. Furthermore, in this embodiment, the provision of the non-contact surface 14 simplifies the configuration of the exhaust structure and the position adjustment of the exhaust holes 12, allowing the function of adjusting the airflow direction in the left-right and up-down directions and the function of closing the ventilation passage to be easily and stably achieved at the same time. This also increases the degree of freedom in the design of the airflow direction adjusting device 1.

[0056] The present invention is not limited to the above-described embodiments, and various modifications are possible as long as they have substantially the same configuration as that described in the claims of the present invention and provide similar effects.

[0057] In the above-described embodiment, the exhaust structure of the airflow direction adjustment device 1 is provided on the lower wall portion of the case body 10 and the lower end portion of the exhaust control fin 30a, but in the present invention, the exhaust structure of the airflow direction adjustment device 1 may also be provided on the upper wall portion of the case body 10 and the upper end portion of the exhaust control fin 30a.

[0058] In the above-described embodiment, the rotating members that open and close the ventilation passages of the case body 10 are vertical fins 30 that adjust the airflow direction in the left-right direction. However, in the present invention, the rotating members that open and close the ventilation passages are not limited to vertical fins, and may be horizontal fins that adjust the airflow direction in the up-down direction or fins that can rotate in other directions.

[0059] Furthermore, the air blowing device of the present invention may be formed without a function to adjust the direction of air blown out from the outlet. For example, the air blowing device of the present invention may be formed without vertical fins that adjust the air direction left and right and horizontal fins that adjust the air direction up and down, as long as a rotating member such as a shut valve that opens and closes the ventilation passage of the case body is provided inside the case body.

[0060] For example, if the air blowing device has a shutoff valve that opens and closes the ventilation passage in the case body, the exhaust structure of the air blowing device can be formed by an exhaust hole provided in the case body, a wrap area provided in the case body and centered on the rotation center of the shutoff valve, and a sliding contact part provided in the shutoff valve and in sliding contact with the wrap area. Even with this exhaust structure, when the air blowing from the air blowing device is stopped by the shutoff valve, it is possible to prevent or suppress air leakage from between the shutoff valve and the case body, making it less likely that abnormal noises such as wind noise or drafts will occur.

[0061] The present invention can also be applied to an air blowing device that has, for example, vertical fins that adjust the air direction left and right, and / or horizontal fins that adjust the air direction up and down, and is further provided with a shut valve (rotating member) that opens and closes the ventilation passage of the case body. [Explanation of symbols]

[0062] 1 Air blowing device (wind direction adjustment device) 10 Case body 11 Air outlet 12 Exhaust vent 13 Wrap Area 14 Non-contact surface 20 horizontal fins 21 Horizontal fin body 30 Vertical fin (rotating member) 30a Exhaust Control Fins 31 Vertical fin body 32 Rotating shaft 33 Second link shaft 34 Sliding contact part 35 Sliding body 36 Exhaust prevention section 40 Operation knob C. Rotation center of exhaust control fin D Semi-major axis dimension

Claims

1. An air blowing device having a case body provided with an air passage for circulating air inside, and at least one rotating member rotatably arranged in the case body, The ventilation passage of the case body is opened and closed by rotation of the rotary member, an exhaust structure is provided that exhausts air from within the case body when the rotating member closes the ventilation passage; the exhaust structure includes an exhaust hole provided in the case body, a wrap area set on the case body centered on the rotation center of the rotating member, and a sliding contact portion provided on the rotating member and in sliding contact with the wrap area, The exhaust hole is disposed within the wrap region; the wrap region has a non-contact surface that does not come into contact with the sliding contact portion, the non-contact surface is displaced by rotation of the rotating member, The exhaust hole is opened and closed by the displacement of the non-contact surface. An air blowing device characterized by:

2. The exhaust structure is formed to open the exhaust hole when the rotating member rotates to a closing position that closes the ventilation passage. The air blowing device according to claim 1.

3. the sliding contact portion has a sliding contact main body portion having an elliptical cross section perpendicular to the rotation axis direction of the rotating member, The sliding contact portion has an exhaust prevention structure that prevents the air from being exhausted through the exhaust hole when the ventilation passage is opened by the rotating member. The air blowing device according to claim 1.

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