Wind direction adjusting device

Abstract

To provide a wind direction adjusting device capable of actualizing good operationality of fins by stably generating an approximate magnitude of operating load when rotating the fins.SOLUTION: A wind direction adjusting device (10) according to this invention includes a housing (11), a plurality of fins (20), and a link member (30), at least one fin (20) having a fin body (21), a first shaft part (22) protruding from the fin body (21), and a second shaft part (23) provided separately from the first shaft part (22), the link member (30) being mounted with a resistance generation member (40), the resistance generation member (40) having an insertion hole portion (41a) through which the second shaft part (23) of the at least one fin (20) is inserted until contacting the inner peripheral face. A length size (Lr) of the second shaft part (23) is set to be greater than a length size (Ls) of a contact region between the second shaft part (23) and the insertion hole portion (41a).SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a wind direction adjustment device. [Background technology]

[0002] Vehicles such as automobiles are equipped with airflow control devices that can change the direction of the air blown into the vehicle interior. Airflow control devices are also called ventilators, registers, air outlets (or simply outlets), and contribute to improving the comfort of the vehicle interior through heating and cooling.

[0003] For example, JP 2022-25551 A (Patent Document 1) describes an airflow direction adjustment device that is attached to an interior member of an automobile. The airflow direction adjustment device described in Patent Document 1 has a housing, three blade members (fins) arranged parallel to each other inside the housing, and a link member that is connected to the blade members so that the rotation of the three blade members is linked.

[0004] The housing of Patent Document 1 has a cylindrical housing main body and a fixing member fixed to the housing main body. The fixing member has a base portion fixed to a side plate portion of the housing main body, and a bush body that is assembled to the base portion and generates an operating load (operating torque) when rotating the blade members.

[0005] The bush body is elastic. The bush body has a bush main body, a fitting hole provided in the bush main body and into which the rotating shaft of the blade member is fitted, and four recesses and four protrusions provided on the outer circumferential surface of the bush main body. The base portion is provided with a holding portion that houses and holds the bush body. The holding portion has four resistance applying portions provided in correspondence with the recesses of the bush body, and four resistance reducing portions provided in correspondence with the protrusions of the bush body.

[0006] According to the airflow direction adjusting device of Patent Document 1, when the blade member with the rotating shaft fitted to the bushing rotates, the frictional resistance between the rotating shaft and the bushing can be increased in the angle range where the resistance applying part of the holding part is provided, and the frictional resistance can be reduced in the angle range where the resistance reducing part is provided. This makes it easier to generate the desired frictional resistance expected at the time of design, and can stably generate an appropriate operating load, so that the operability of the blade member can be easily and stably obtained. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Patent Publication No. 2022-25551 Summary of the Invention [Problem to be solved by the invention]

[0008] In a conventional operating load generating mechanism for a wind direction adjustment device, such as that using a bush body described in Patent Document 1, the rotating shaft portion of the fin (blade member) is inserted into a hole in an elastic member such as a bush body, and an operating load is generated by bringing the rotating shaft portion into contact with the elastic member when the fin rotates.

[0009] However, in conventional operational load generating mechanisms, the range (overlap amount) where the rotating shaft of the fin comes into contact with the elastic member can change due to the influence of the link member that links the rotation of the blade members, the influence of the operation of the user to rotate the blade members, etc. As a result, the operational load generated when the fin rotates can become unstable, which can reduce the operability of the fin.

[0010] The present invention has been made in consideration of the above-mentioned problems in the conventional art, and its object is to provide a wind direction adjustment device that can stably generate an appropriate amount of operating load when rotating the fins, thereby achieving good operability of the fins. [Means for solving the problem]

[0011] In order to achieve the above-mentioned object, the present invention provides an airflow direction adjustment device having a housing, a plurality of fins rotatably arranged within the housing, and a link member that links the rotation of the plurality of fins to each other, wherein at least one of the fins has a fin main body portion, a first shaft portion protruding from the fin main body portion and rotatably held in the housing, and a second shaft portion protruding from the fin main body portion and provided separately from the first shaft portion, a resistance generating member that generates frictional resistance when the fin rotates is attached to the link member, the resistance generating member has elasticity and an insertion hole portion through which the second shaft portion of at least one of the fins is inserted to contact an inner circumferential surface, and the axial length dimension of the second shaft portion is set to be larger than the axial length dimension of a contact area between the second shaft portion and the inner circumferential surface of the insertion hole portion.

[0012] In the air direction adjustment device of the present invention, it is preferable that the link member has a first connecting structure to which the resistance generating member is attached, thereby rotatably connecting the fins via the resistance generating member, and a second connecting structure that engages with at least a portion of the fins to rotatably connect the fins. Effect of the Invention

[0013] According to the airflow direction adjusting device of the present invention, an appropriate amount of operating load can be stably generated when rotating the fins, thereby achieving good operability of the fins. [Brief description of the drawings]

[0014] [Figure 1] 1 is a perspective view showing a schematic view of an airflow direction adjustment device according to an embodiment of the present invention; [Diagram 2] 2 is an enlarged perspective view showing a schematic view of a part of a horizontal fin of the airflow direction adjustment device shown in FIG. 1. FIG. [Diagram 3] 2 is a perspective view showing a link member and an elastic member of the airflow direction adjusting device shown in FIG. 1. FIG. [Figure 4] 5 is a cross-sectional view showing a schematic connection between a link shaft portion of a horizontal fin and an elastic member attached to a link member. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] BEST MODE FOR CARRYING OUT THE PRESENT DISCLOSURE Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. Fig. 1 is a perspective view showing a typical example of an airflow direction control device according to the present embodiment. Fig. 2 is a perspective view showing an enlarged schematic view of a portion of a horizontal fin of the airflow direction control device. Fig. 3 is a perspective view showing a typical link member and elastic member of the airflow direction control device. Fig. 4 is a cross-sectional view showing a typical connection portion between a link shaft portion of the horizontal fin and an elastic member attached to the link member.

[0016] 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 the air conditioning device installed in the vehicle, the air conditioning device 10 can blow air, which has been temperature-adjusted by the air conditioning device, into the passenger compartment.

[0017] Here, the front-rear direction of the airflow direction control device 10 is the direction along the flow direction of air flowing inside the housing 11 of the airflow direction control device 10 when the horizontal fins 20 and the vertical fins 12, 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. The up-down direction and the left-right direction are the vertical direction (height direction) and the horizontal direction (width direction) when the airflow direction control device 10 is viewed from the air outlet side.

[0018] The air direction adjustment device 10 of this embodiment has a cylindrical housing 11 that allows air to circulate inside, a plurality of horizontal fins 20 arranged at the outlet side end of the housing 11, a plurality of vertical fins 12 arranged upstream of the horizontal fins 20, and an operating knob 13 that is attached to the horizontal fins 20 and is operated when rotating the horizontal fins 20 and the vertical fins 12.

[0019] As shown in Figures 3 and 4, the airflow direction adjustment device 10 also has a link member 30 that connects multiple horizontal fins 20 and links the rotation of each horizontal fin 20 to each other, and an elastic member 40 that serves as a resistance generating member that generates frictional resistance when the horizontal fins 20 are rotated (not shown in Figure 1).

[0020] The airflow direction control device 10 of this embodiment is mainly characterized by the horizontal fins 20, the link member 30, and the elastic member 40, and other members are not particularly limited. For example, in the airflow direction adjustment device 10 of this embodiment, the horizontal fins 20 are rotated up and down and the vertical fins 12 are rotated left and right by the operation knob 13 attached to the horizontal fins 20. However, in the present invention, an operation dial may be rotatably attached to the housing 11, and the airflow direction adjustment device 10 may be configured so that the horizontal fins 20 are rotated up and down by the operation dial instead of the operation knob 13.

[0021] In the airflow direction adjustment device 10 of this embodiment, the housing 11 has a square cylindrical housing main body 11a and an opening side end (front end) 11b that extends forward from the front end of the housing main body 11a and has larger dimensions in the up-down and left-right directions than the housing main body 11a. When the airflow direction adjustment device 10 is viewed from the front side, the opening side end 11b of the housing 11 is formed in a rectangular shape that is long in the left-right direction, and the horizontal fins 20 are attached inside this opening side end 11b. In this case, a plurality of shaft holders (not shown) corresponding to the left and right rotating shafts (first shafts) 22 provided on each horizontal fin 20 are provided on the left and right side wall portions of the opening side end 11b, respectively.

[0022] In this embodiment, a pair of rotating shaft portions 22 of each horizontal fin 20 is directly inserted into and held by a shaft holding portion provided on the housing 11, so that the horizontal fins 20 are attached to the housing 11 so as to be rotatable in the up and down direction. Note that in the present invention, the horizontal fins 20 may be attached to the housing 11 so as to be rotatable in the up and down direction via an auxiliary member such as the fixing member described in Patent Document 1.

[0023] The airflow direction adjustment device 10 has three horizontal fins 20 that are long in the left-right direction and arranged parallel to each other with a gap in the up-down direction. Each horizontal fin 20 is made of a synthetic resin such as polypropylene. The number, size, material, installation position, etc. of the horizontal fins 20 in the airflow direction adjustment device 10 are not particularly limited.

[0024] The horizontal fins 20 of this embodiment include a first horizontal fin 20a arranged in an upper stage, a second horizontal fin 20b arranged in a middle stage, and a third horizontal fin 20c arranged in a lower stage. An operation knob 13 is attached to the second horizontal fin 20b so as to be movable in the left-right direction within a predetermined range. The first horizontal fin 20a, the second horizontal fin 20b, and the third horizontal fin 20c are connected by a link member 30 to which an elastic member 40 is attached so that the rotations of the horizontal fins 20 are linked to each other.

[0025] The three horizontal fins 20 are formed to be the same shape and size as each other. Each horizontal fin 20 has a thin plate-like fin main body 21, a pair of left and right rotation shafts (first shafts) 22 protruding outward in the left-right direction from the left and right side edges of the fin main body 21, and one link shaft (second shaft) 23 protruding from the left edge of the fin main body 21. Note that the multiple horizontal fins 20 connected to the link member 30 may have different shapes and may be formed to be different sizes as well.

[0026] The left and right rotating shafts 22 of the horizontal fin 20 are formed in a substantially cylindrical shape, and the tip of each rotating shaft 22 has a chamfered truncated cone shape. The left and right rotating shafts 22 extend straight in the left-right direction from the center or approximately the center in the front-rear direction of the left and right side edges of the fin body 21.

[0027] The link shaft 23 of the horizontal fin 20 is provided separately from and away from the rotation shaft 22. The link shaft 23 is formed in a substantially cylindrical shape and extends straight in the left-right direction from a position rearward of the rotation shaft 22 on the left edge of the fin body 21.

[0028] In this embodiment, the link shaft portion 23 has a link shaft main body portion 23a formed in a cylindrical shape and a link shaft tip portion 23b extending from the link shaft main body portion 23a and having a truncated cone shape. The link shaft main body portion 23a is formed with a smaller diameter than the cylindrical portion of the rotating shaft portion 22.

[0029] The three horizontal fins 20 are arranged within the housing 11 so that they can rotate in the vertical direction around the left and right rotating shaft portions 22, with the left and right rotating shaft portions 22 held by the above-mentioned shaft holding portions of the housing 11.

[0030] The link shafts 23 of the first horizontal fin 20a and the third horizontal fin 20c are inserted into and held in connecting holes (described later) of the link member 30. The link shafts 23 of the second horizontal fin 20b are inserted into and held in insertion holes 41a (described later) of an elastic member 40 attached to the link member 30.

[0031] 3, the link member 30 of this embodiment has a base portion 31, bearing holes 32 provided at one end (upper end) and the other end (lower end) in the vertical direction of the base portion 31, and an attachment portion 33 to which the elastic member 40 is attached. The base portion 31 is formed in a plate shape that is long in the vertical direction. The base portion 31 has left and right base surfaces facing in the left and right direction, and the left and right base surfaces are each formed flat.

[0032] The two bearing hole portions 32 of the link member 30 are formed so that their cross sections perpendicular to the left-right direction are circular, and penetrate the base portion 31 from one base surface to the other base surface. The two bearing hole portions 32 are provided corresponding to the link shaft portions 23 of the first horizontal fin 20a and the third horizontal fin 20c arranged in the housing 11, and each link shaft portion 23 is received in (engaged with) the bearing hole portions 32 to rotatably hold them.

[0033] In the present invention, the link member 30 may be provided with a bearing recess that is provided on one base surface of the base portion 31 and has a bottom surface portion, instead of the bearing hole portion 32 of this embodiment. Even with such a bearing recess that has a bottom surface portion, it is possible to rotatably hold the link shaft portion 23 of the horizontal fin 20 on the link member 30. Furthermore, in the present invention, it is also possible to rotatably connect the horizontal fin 20 to the link member 30 by providing the link member 30 with a protruding shaft portion that protrudes from the base portion 31 and providing the first horizontal fin 20a with a bearing recess that receives the protruding shaft portion and holds it rotatably.

[0034] The attachment portion 33 of the link member 30 has an accommodating hole portion 33a that accommodates and holds the elastic member 40, an outer frame portion 33b that protrudes in an arc shape from the base surface of the base portion 31, and a recessed groove portion 33c that is recessed in the base portion 31 from the accommodating hole portion 33a toward the front. The inner peripheral surface of the outer frame portion 33b smoothly continues to the inner peripheral surface of the accommodating hole portion 33a.

[0035] The link member 30 rotatably holds the rotation shaft portion 22 of the second horizontal fin 20b via the elastic member 40 attached to the attachment portion 33. That is, the link member 30 in this embodiment is provided with one first connecting structure that rotatably connects the second horizontal fin 20b via the elastic member 40, and two second connecting structures that hold the link shaft portions 23 of the first horizontal fin 20a and the third horizontal fin 20c in the bearing hole portions 32 and rotatably connect the first horizontal fin 20a and the third horizontal fin 20c.

[0036] An engaging protrusion 33d that engages with the elastic member 40 when the elastic member 40 is accommodated in the accommodating hole 33a is provided on the inner peripheral surface of the accommodating hole 33a so as to protrude radially inward (toward the center of the accommodating hole 33a). A protruding piece 43 of the elastic member 40, which will be described later, is accommodated in the concave groove 33c of the attachment part 33. In the present invention, the attachment part 33 of the link member 30 is not particularly limited in terms of its specific shape, structure for holding the elastic member 40, etc., as long as it is formed so as to be able to hold the elastic member 40 immovably in a predetermined orientation.

[0037] The elastic member (resistance generating member) 40 of this embodiment is made of a soft synthetic resin having elasticity. Note that the material of the elastic member 40 is not particularly limited as long as the elastic member 40 has elasticity.

[0038] 3 and 4, the elastic member 40 has a substantially cylindrical elastic main body portion 41, a flange portion 42 integrally provided on one end (the left end) of the elastic main body portion 41, and a protruding piece portion 43 extending in a small piece shape from the elastic main body portion 41. An engaging recess 44 for engaging the engaging protrusion 33d of the link member 30 is provided on an outer circumferential surface 49 of the elastic main body portion 41. The elastic member 40 is attached to the attachment portion 33 of the link member 30 by bringing the elastic main body portion 41 into contact with the inner circumferential surface of the accommodating hole portion 33a and by engaging the engaging protrusion 33d of the accommodating hole portion 33a with the engaging recess 44.

[0039] The elastic main body portion 41 has an insertion hole portion 41a, through which the link shaft portion 23 of the second horizontal fin 20b is inserted and provided along the central axis of the elastic main body portion 41. The elastic main body portion 41 has an inner circumferential surface 48 that surrounds the insertion hole portion 41a and an outer circumferential surface 49 disposed on the opposite side of the inner circumferential surface 48.

[0040] The inner circumferential surface 48 of the elastic main body portion 41 has a first inner circumferential surface 48a that comes into contact with the link shaft portion 23 of the second horizontal fin 20b, and a second inner circumferential surface 48b that is formed with an inner diameter larger than that of the first inner circumferential surface 48a via a step portion 48c (see FIG. 4). The first inner circumferential surface 48a of the elastic member 40 is formed continuously from the edge of the elastic member 40 on the side where the link shaft portion 23 is inserted to the position of the step portion 48c. In this case, the position of the step portion 48c is set on the side farther from the flange portion 42 than the engagement recess 44 provided in the outer circumferential surface 49 of the elastic main body portion 41 in the central axial direction of the elastic main body portion 41.

[0041] The first inner circumferential surface 48a of the elastic main body 41 is formed such that the inner diameter of the first inner circumferential surface 48a is smaller than the diameter of the link shaft portion 23 of the second horizontal fin 20b (specifically, the diameter of the link shaft main body 23a). As a result, when the link shaft portion 23 of the second horizontal fin 20b is inserted into the insertion hole portion 41a of the elastic member 40, the link shaft portion 23 of the second horizontal fin 20b receives an elastic force that presses the link shaft portion 23 of the second horizontal fin 20b radially inward from the portion that forms the first inner circumferential surface 48a of the elastic member 40, so that frictional resistance can be generated between the link shaft portion 23 of the second horizontal fin 20b and the elastic member 40. The second inner circumferential surface 48b of the elastic main body 41 is disposed away from the link shaft portion 23 that is inserted into the insertion hole portion 41a.

[0042] 4, for example, the dimensions of the link shaft portion 23 of the second horizontal fin 20b and the link shaft main portion 23a of the link shaft portion 23 in the axial direction of the link shaft portion 23 (or the central axial direction of the elastic main portion 41) are defined as the length dimension Lr of the link shaft portion 23 and the length dimension Lr' of the link shaft main portion 23a. Furthermore, the dimension of the first inner circumferential surface 48a with which the link shaft portion 23 of the elastic member 40 contacts is defined as the length dimension Ls of the first inner circumferential surface 48a. In this case, the length dimension Ls of the first inner circumferential surface 48a means the length dimension in the axial direction of the contact area between the link shaft portion 23 of the second horizontal fin 20b and the elastic member 40.

[0043] In the airflow direction adjustment device 10 of this embodiment, the length dimension Lr of the link shaft portion 23 is set to be larger than the length dimension Ls of the first inner circumferential surface 48a. In particular, in this embodiment, the length dimension Lr' of the link shaft main body 23a is set to be larger than the length dimension Ls of the first inner circumferential surface 48a. By making the length dimension Lr of the link shaft portion 23 larger than the length dimension Ls of the first inner circumferential surface 48a in this manner, the outer circumferential surface of the link shaft portion 23 of the second horizontal fin 20b can be brought into stable contact with the entire surface of the first inner circumferential surface 48a of the elastic member 40.

[0044] In the airflow direction adjustment device 10 of this embodiment as described above, the link shaft portion 23 of the second horizontal fin 20b is rotatably supported by the elastic member 40 attached to the link member 30, and the link shaft portion 23 is in contact with the first inner peripheral surface 48a of the elastic member 40. This allows a stable generation of friction resistance between the elastic member 40 and the link shaft portion 23 of the second horizontal fin 20b when, for example, a driver or the like operates the operation knob 13 to rotate the three horizontal fins 20 in the up-down direction. That is, in this embodiment, the contact between the link shaft portion 23 of the second horizontal fin 20b and the elastic member 40 allows a stable generation of an operation load (operation torque) when operating the horizontal fin 20, thereby improving the operability of the horizontal fin 20.

[0045] Furthermore, as described above, the length dimension Lr of the link shaft portion 23 of the second horizontal fin 20b is set to be greater than the length dimension Ls of the first inner circumferential surface 48a of the elastic member 40. This allows the link shaft portion 23 of the second horizontal fin 20b to come into more stable contact with the entire surface of the first inner circumferential surface 48a of the elastic member 40. This also makes it possible to make the link shaft portion 23 of the second horizontal fin 20b less susceptible to a pushing force (a force in a direction in which the link shaft portion 23 comes out) that causes the link shaft portion 23 to fall off the elastic member 40 due to the elasticity of the elastic member 40.

[0046] Furthermore, when the horizontal fin 20 is rotated, the contact range (contact area) between the first inner circumferential surface 48a of the elastic member 40 and the link shaft portion 23 of the second horizontal fin 20b can be prevented from changing. For example, even if the link shaft portion 23 of the second horizontal fin 20b moves slightly in the left-right direction relative to the elastic member 40 when the driver operates the operation knob 13 of the airflow direction adjustment device 10, the link shaft portion 23 of the second horizontal fin 20b can be easily maintained in a state in which it is in contact with the entire surface of the first inner circumferential surface 48a of the elastic member 40 (in other words, a state in which the elastic member 40 and the link shaft portion 23 are in contact with each other over a constant area). Therefore, when the horizontal fin 20 is rotated, the operating load is prevented from becoming unstable as in the conventional case, and good operability can be stably maintained. In addition, the link shaft portion 23 of the second horizontal fin 20b can be prevented from slipping out of the elastic member 40 and falling off.

[0047] Moreover, the elastic member 40 of this embodiment is attached to the link member 30, and rotatably supports the link shaft portion 23 of the second horizontal fin 20b. That is, in the air direction adjustment device 10 of this embodiment, when the horizontal fin 20 is rotated, the link shaft portion 23, which is formed separately from the rotation shaft portion 22 of the second horizontal fin 20b, is brought into sliding contact with the elastic member 40 to generate frictional resistance, and frictional resistance is not generated between the rotation shaft portion 22 of the second horizontal fin 20b and the elastic member 40 as in the technology described in Patent Document 1, for example.

[0048] In this way, in the horizontal fin 20, by generating frictional resistance between the elastic member 40 and the link shaft 23 provided separately from the rotating shaft 22 at a position away from the rotating shaft 22, a larger operating load can be easily obtained when the horizontal fin 20 rotates, in comparison with the case where frictional resistance is generated between the elastic member 40 and the rotating shaft 22, for example, due to the lever ratio relationship with the rotation shaft of the horizontal fin 20. For this reason, as described above, even if the length dimension Ls of the first inner circumferential surface 48a of the elastic member 40 is set smaller than the length dimension Lr of the link shaft 23 of the second horizontal fin 20b, and even if there is only one mechanism (structure) for generating frictional resistance between the elastic member 40, a sufficient operating load can be stably secured.

[0049] Furthermore, the link shaft 23 of the horizontal fin 20 and the link member 30 are often less subject to design constraints than the rotation shaft 22 of the horizontal fin 20 and the shaft retaining portion of the housing 11. For this reason, by supporting the link shaft 23 of the second horizontal fin 20b by attaching the elastic member 40 to the link member 30 as in this embodiment, the contact range (contact area) between the elastic member 40 and the link shaft 23 and the magnitude of the generated frictional resistance can be more easily controlled than in the case where, for example, an elastic member is directly or indirectly attached to the housing to support the rotation shaft of the second horizontal fin, and therefore the magnitude of the operating load can be adjusted relatively easily.

[0050] 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 those described in the claims of the present invention and provide similar operational effects.

[0051] For example, in the above-described embodiment, the link member 30 is provided with one attachment portion 33 (first connecting structure) and two bearing hole portions 32 (second connecting structure). However, in the present invention, the number of attachment portions and the number of bearing hole portions provided on the link member are not particularly limited. For example, in the case of this embodiment, instead of the link member 30 shown in Figures 3 and 4, the wind direction adjustment device may be formed using a link member provided with two attachment portions for attaching the elastic member 40 and one bearing hole portion.

[0052] Furthermore, in the above-described embodiment, the link members 30 and the elastic members 40 are provided for the horizontal fins 20 , but in the present invention, the link members and the elastic members may be provided for the vertical fins 12 . [Explanation of symbols]

[0053] 10 Wind direction adjustment device 11. Housing 11a Housing body 11b Opening side end (front end) 12 Vertical fin 13 Operation knob 20 Horizontal Fin 20a First horizontal fin 20b Second horizontal fin 20c 3rd horizontal fin 21 Fin body 22 Rotating shaft portion (first shaft portion) 23 Link shaft (second shaft) 23a Link shaft body 23b Link shaft tip 30 Link member 31 Base 32 Bearing hole 33 Mounting part 33a Receiving hole 33b Outer frame 33c Groove 33d engaging protrusion 40 Elastic member (resistance generating member) 41 Elastic body part 41a Insertion hole 42 Flange part 43 Projection part 44 Engagement recess 48 Inner surface 48a 1st inner surface 48b 2nd inner circumferential surface 48c Step 49 Outer surface Lr Length of the link shaft of the second horizontal fin Lr' Length dimension of the link shaft body of the second horizontal fin Ls: Length dimension of the first inner circumferential surface of the elastic member

Claims

1. A wind direction adjustment device having a housing, a plurality of fins rotatably arranged within the housing, and a link member that links the rotation of the plurality of fins to each other, At least one of the fins has a fin body, a first shaft portion protruding from the fin body and rotatably held by the housing, and a second shaft portion protruding from the fin body and provided separately from the first shaft portion, a resistance generating member that generates frictional resistance when the fin rotates is attached to the link member; the resistance generating member has elasticity and has an insertion hole portion through which the second shaft portion of at least one of the fins is inserted and into contact with an inner circumferential surface of the resistance generating member; The second shaft portion has an axial length dimension set to be larger than the axial length dimension of a contact area between the second shaft portion and the inner circumferential surface of the insertion hole portion. A wind direction adjustment device characterized by the above.

2. The link member has a first connection structure to which the resistance generating member is attached to rotatably connect the fins via the resistance generating member, and a second connection structure that engages with at least a portion of the fin to rotatably connect the fins. The wind direction adjusting device according to claim 1.

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