Wind direction adjustment device

Abstract

To provide a wind direction adjustment device that can suppress unintended rotation of a louver due to own weight.SOLUTION: A wind direction adjustment device 1 includes: a louver 15; and a side frame part 5 for holding the louver 15 so as to be rotatable. The louver 15 has a rotation axis line A that is positioned while being separated from a center of gravity of the louver 15. The wind direction adjustment device further includes reactive force imparting means 20 for imparting reactive force with respect to the weight of the louver 15 which is generated on a side of the center of gravity relative to the rotation axis line A.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an airflow direction adjusting device including a louver and a holding portion that rotatably holds the louver. [Background technology]

[0002] Conventionally, air conditioners used in vehicles such as automobiles include air direction adjustment devices that adjust the direction of air being blown out. Air direction adjustment devices are also called air conditioning air outlets, air vents, registers, etc., and are installed in various parts of the vehicle, such as the instrument panel or center console, to contribute to improving comfort through heating and cooling.

[0003] The louvers provided in the airflow direction adjustment device are rotatably held in a housing, and the airflow direction can be adjusted by rotation. Conventionally, the rotation axis of the louvers extending in the left-right direction was positioned so as to pass through the center of gravity of the louvers, i.e., the center position of the louvers. However, in recent years, due to changes in design, there has been known a configuration in which the rotation axis is positioned closer to the passenger compartment than the center of gravity of the louvers (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2021-109491 A (Pages 6-11, Figure 2) Summary of the Invention [Problem to be solved by the invention]

[0005] There is a concern that misalignment between the pivot axis and the center of gravity of the louver will cause the louver to rotate upward due to its own weight. In other words, because of the misalignment between the pivot axis and the center of gravity, gravity constantly generates an upward rotational force on the louver, so the operating load is light when rotating upward and heavy when rotating downward, which raises concerns that when an occupant operates the louver, the operating load will be different for rotating upward and rotating downward. Depending on the structure and weight of the louver, a force greater than the operating force tolerance of the louver may be generated, which is necessary to prevent problems such as a deterioration in the operating feel, instability of the operating load, and the louver rotating due to weight caused by changes in dimensions and physical properties due to temperature changes.

[0006] The present invention has been made in consideration of the above points, and has an object to provide a wind direction adjusting device that can suppress unintentional rotation due to the weight of the louver. [Means for solving the problem]

[0007] The airflow direction adjusting device according to claim 1 is an airflow direction adjusting device comprising a louver and a holding part for rotatably holding the louver, wherein the rotation axis of the louver is located away from the center of gravity of the louver, and further comprising a reaction force applying means for applying a reaction force to the weight of the louver that occurs on the center of gravity side with respect to the rotation axis. The louver has a rotation axis and a connection portion located away from the rotation axis toward the center of gravity, and the reaction force applying means is a torsion spring having a coil-shaped main body attached to the rotation axis, one arm extending from one end of the main body and held by the holding portion, and another arm extending from the other end of the main body and attached to the connection portion. It is something.

[0008] The airflow direction adjusting device according to claim 2 is the airflow direction adjusting device according to claim 1, wherein the reaction force applying means applies a reaction force so as to balance the weight of the louver in the neutral position. 。 [Effects of the Invention]

[0009] According to the airflow direction adjusting device of claim 1, the reaction force applied by the reaction force applying means prevents unintended rotation due to the weight of the louver. With a simple configuration It can be suppressed.

[0010] According to the airflow direction adjustment device of claim 2, in addition to the effect of the airflow direction adjustment device of claim 1, it is possible to suppress the difference in operating force when rotating the louver in the direction of gravity and when rotating it in the opposite direction, which is expected to improve the operating feel and stabilize the operating load. 。 [Brief explanation of the drawings]

[0011] [Figure 1] 1 is an exploded perspective view of a portion of an airflow direction adjustment device according to a first embodiment of the present invention. [Figure 2] FIG. 2 is a perspective view of a portion of the airflow direction adjustment device. [Figure 3] FIG. [Figure 4] FIG. [Figure 5] FIG. 10 is an exploded perspective view of a portion of an airflow direction adjusting device according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0012] A first embodiment of the present invention will be described below with reference to the drawings.

[0013] In FIG. 4, reference numeral 1 denotes a wind direction control device. The wind direction control device 1 is also called an air outlet, ventilator, register, or the like, and controls the direction of airflow from an air conditioner or the like. Hereinafter, for clarity, the windward side of the wind direction control device 1, from which air flows, is referred to as the front side, front side, or near side, and the opposite side, i.e., the windward side from which air flows, is referred to as the rear side, back side, or far side. The two-way direction, or width direction, as viewed from the front, and the up-down direction are defined. In this embodiment, the wind direction control device 1 is applied to an air conditioner for a vehicle such as an automobile. The wind direction control device 1 may be disposed in any position, but in the drawings, it is disposed so that the arrow FR side is the front side, the arrow RR side is the rear side, the arrow L side is the left side, the arrow R side is the right side, the arrow U side is the top side, and the arrow D side is the bottom side. These directions are merely shown as examples and may be changed as appropriate depending on the installation location and orientation of the wind direction control device 1.

[0014] The airflow direction control device 1 is disposed at the downstream end of a duct that defines an air passage connected to an air conditioner or the like. In the illustrated example, the airflow direction control device 1 is disposed so as to blow air from the rear to the front. The airflow direction control device 1 includes a case body 3. In this embodiment, the case body 3 is a frame formed in a rectangular frame shape. In the illustrated example, the case body 3 is configured in a frame shape by left and right side frame portions 5, 5 that extend along the vertical direction and end frame portions 6, 6 that connect the upper and lower parts of these side frame portions 5, 5 to each other. An air outlet 7 is surrounded in the center of the case body 3 by the side frame portions 5, 5 and the end frame portions 6, 6.

[0015] Each side frame portion 5 is also called a spacer. Each side frame portion 5 has a predetermined width and defines a space behind it. In this embodiment, each side frame portion 5 is formed with a U-shaped cross section, having side portions 10, 10 located apart on the left and right, and a connecting surface portion 11 connecting the front portions of these side portions 10, 10. The side portion 10 has main surfaces on the left and right, and is a surface extending longitudinally in the vertical direction.

[0016] Louvers 15 are rotatably attached between the side frame portions 5, 5. That is, the side frame portions 5, 5 are holders that rotatably hold the louvers 15. The louvers 15, also called fins, rotate relative to the case body 3 to adjust the direction of the conditioned air blown out from the air outlet 7 in accordance with the rotation. In this embodiment, the louvers 15 are horizontal louvers extending in the left-right direction, i.e., horizontally. In the illustrated example, multiple louvers 15 are positioned above and below the air outlet 7 and arranged across the air outlet 7. The louvers 15 are downstream louvers located at the most downstream side of the air passage. There may be one or more louvers 15, but in this embodiment, multiple louvers are set as shown in FIG. 3. In the illustrated example, the louvers 15 include louver 15a located at the top, louver 15b located in the center in the up-down direction, and louver 15c located at the bottom. In the illustrated example, louver 15b is the heaviest, followed by louver 15a and louver 15c in order of weight. Louvers 15a, 15b, and 15c are connected by link body 16, and are configured to rotate in the same direction in conjunction with one another. In this embodiment, louvers 15a and 15c, which are located above and below, are located further rearward, i.e., upstream of louver 15b, which is located in the center in the vertical direction.

[0017] In this embodiment, the rotation axis A of the louver 15 is located near the front end of the louver 15. The rotation axis A of the louver 15 is located forward and away from the center of gravity G. In this embodiment, the rotation axis 17 protrudes from both ends of the louver 15 in the longitudinal direction, i.e., from both the left and right sides. Note that although Figs. 1 and 2 show the louver 15a as an example, at least one of the louvers 15b and 15c may also have a similar configuration.

[0018] The rotation shaft 17 is formed in a cylindrical shape. The rotation shaft 17 sets a rotation axis A which is the rotation center of the louver 15. In other words, the central axis of the rotation shaft 17 becomes the rotation axis A of the louver 15. Each rotation shaft 17 is rotatably supported by a rotation receiving portion 19 formed in each side frame portion 5. The rotation receiving portion 19 is formed in the shape of a round hole having a diameter dimension slightly larger than the outer diameter dimension of the rotation shaft 17. The rotation receiving portion 19 is formed to penetrate the side surface portion 10 on the air outlet 7 side of each side frame portion 5. In other words, the rotation shaft 17 is rotatably inserted into the rotation receiving portion 19.

[0019] Furthermore, at least one of the louvers 15, in this embodiment louver 15a, is fitted with a reaction force applying means 20. The reaction force applying means 20 applies a reaction force to at least one of the louvers 15 against the weight generated on the side of the center of gravity G (FIG. 3) with respect to the rotation axis A. In this embodiment, the reaction force applying means 20 is configured to apply a reaction force to the louver 15a so as to balance the weight generated on the side of the center of gravity G (FIG. 3) with respect to the rotation axis A in the louver 15 when the louver 15 is in a neutral position, for example, when the louver 15b is in an orientation parallel (including approximately parallel) to the wind axis W (FIG. 3), which is the central axis of the duct.

[0020] In this embodiment, the reaction force applying means 20 is, for example, a torsion spring. The reaction force applying means 20 has a coil-shaped main body 22 attached to the rotation shaft 17 of the louver 15a. In the illustrated example, the rotation shaft 17 is inserted into the main body 22, and the main body 22 is held on the outer peripheral surface of the rotation shaft 17. In other words, the main body 22 is arranged concentrically (coaxially) with the rotation shaft 17. The reaction force applying means 20 has one arm 23 extending from one end of the main body 22. The one arm 23 is held by the side frame 5. In this embodiment, the one arm 23 is held in a groove 24 formed in the side frame 5. The groove 24 is formed, for example, along the vertical direction. In the illustrated example, the groove 24 is formed in a rib portion 25 located in the space behind the side frame 5. Therefore, the one arm 23 is positioned along the vertical direction. Moreover, one arm portion 23 is located forward with respect to the rotation axis A.

[0021] Further, the reaction force applying means 20 has another arm 26 extending from the other end of the main body 22. The other arm 26 is connected to the louver 15a side. In this embodiment, the other arm 26 is connected to a connecting portion 27 of the louver 15a. The connecting portion 27 is located on the louver 15a, away from the center of gravity G (FIG. 3) of the rotation axis 17. The connecting portion 27 is located on the opposite side of the rotation axis 17 with respect to the center of gravity G (FIG. 3). In other words, the connecting portion 27 is located rearward of the rotation axis 17. In this embodiment, the connecting portion 27 is a cylindrical pin that is parallel (or substantially parallel) to the rotation axis 17. The connecting portion 27 protrudes from at least one end in the longitudinal direction of the louver 15a, i.e., the left or right side. A holding groove 27a is formed at the tip of the connecting portion 27, and the tip of the other arm 26 is wrapped around the holding groove 27a to be held in place. The connecting portion 27 is supported by a receiving portion 28 formed on one of the side frame portions 5. The receiving portion 28 is formed in the shape of an elongated hole having a width dimension slightly larger than the outer diameter dimension of the connecting portion 27. The receiving portion 28 is a through-hole formed through the side surface portion 10 on the air outlet 7 side of the side frame portion 5. In other words, the receiving portion 28 is formed on the same side surface portion 10 as one of the rotating receiving portions 19. The receiving portion 28 is located rearward of the rotating receiving portion 19. The connecting portion 27 is movably inserted into the receiving portion 28.

[0022] The receiving portion 28 is formed along an arc centered on the rotation axis A of the louver 15a. In the illustrated example, the receiving portion 28 is shaped like an elongated hole extending in the vertical direction. The length and position of the receiving portion 28 are set according to the rotation range of the louver 15a. That is, the receiving portion 28 is set to a length that allows the connection portion 27 to move within the range between the positions at which the louver 15a rotates maximum up and down. In this embodiment, the upper part of the receiving portion 28 extends above the rotation axis A and the rotation receiving portion 19, and the lower part of the receiving portion 28 extends below the rotation axis A and the rotation receiving portion 19.

[0023] Therefore, the reaction force applying means 20 is housed in the space behind the side frame portion 5.

[0024] In this embodiment, as shown in FIG. 3 , a knob 31 is attached to at least one of the louvers 15, for example, the louver 15b located in the vertical center. The knob 31 is located at the bottom of the louver 15b. The knob 31 rotates the louver 15. The knob 31 has a gripping portion 33 that protrudes from the louver 15b toward the front, i.e., the interior of the vehicle. The gripping portion 33 is a portion that is gripped and operated by a user, such as a passenger. In this embodiment, the gripping portion 33 protrudes, for example, from the bottom of the louver 15b. The gripping portion 33 also has a guided portion 33a that moves the knob 31 along the louver 15b. The guided portion 33a is engaged with a guide portion 34 formed on the louver 15b. The engagement between the guided portion 33a and the guide portion 34 allows the knob 31 to slide in the left-right direction, which is the longitudinal direction of the louver 15b. The knob 31 also has a louver connecting portion 35. The louver connecting portion 35 protrudes from the opposite side of the knob 31 from the gripping portion 33, i.e., from the rear of the knob 31. The louver connecting portion 35 is connected to an upstream louver 36 that is different from the louver 15. In other words, the knob 31 moves along the louver 15b to rotate the upstream louver 36. In this embodiment, the knob 31 and the louver 15b set the center of gravity G of the louver 15 rearward of the pivot shaft 17, below the louver 15b, and near the center of the knob 31.

[0025] The upstream louvers 36 shown in FIGS. 3 and 4 are also called fins and are attached to the case body 3 or the duct, upstream of the louvers 15, so as to be rotatable in a direction intersecting or perpendicular to the rotation direction of the louvers 15. The upstream louvers 36 rotate relative to the case body 3 to adjust the direction of the conditioned air blown out from the air outlet 7 in accordance with their rotation. In this embodiment, the upstream louvers 36 are vertical louvers extending in the vertical direction. The upstream louvers 36 are formed with a rotating portion 40. The rotating portion 40 is rotatably held by a rotating support formed on the case body 3 or the duct. One of the rotating portion 40 and the rotating support is a rotating shaft, and the other is a rotating support such as a hole. In this embodiment, the rotating portion 40 is the rotating shaft, and the rotating support is the hole. In the illustrated example, the rotating portions 40 are provided above and below the upstream louvers 36, protruding on the same axis.

[0026] Furthermore, a notch 42 is formed in the front edge of the upstream louver 36, which is the edge on the louver 15 side, and a shaft 43 that connects to the louver connecting part 35 is formed in this notch 42 and extends in the vertical direction. Since the louver connecting part 35 is positioned on either side of the shaft 43 in the left-right direction, a force is applied to the upstream louver 36 in the left-right direction when the knob 31 slides left-right, and the upstream louver 36 rotates left and right around the rotating part 40 in conjunction with the positioning.

[0027] In this embodiment, a plurality of upstream louvers 36 are arranged across the entire left-right direction of the air outlet 7. Except for the upstream louver 36 located in the center in the left-right direction, the other upstream louvers 36 do not have the notches 42 or the shafts 43 and are connected to the upstream louver 36 located in the center in the left-right direction by a connector such as a link. In this embodiment, each upstream louver 36 has an interlocking portion 45 formed at a position spaced apart from the pivoting portion 40. In the illustrated example, the interlocking portion 45 is a cylindrical convex portion having an axis parallel to the pivoting portion 40. The interlocking portions 45 are rotatably connected to each other by the link, so that the other upstream louvers 36 rotate in the same direction as the rotation of the upstream louver 36 located in the center in the left-right direction. In the illustrated example, the upstream louvers 36 can be configured to overlap each other and block the air outlet 7 when rotated to the left or right at their maximum positions.

[0028] Next, the operation of the first embodiment will be described.

[0029] The airflow direction adjustment device 1 distributes the conditioned air that has passed through the duct by the upstream louver 36 and the louver 15 and blows it out from the air outlet 7.

[0030] The airflow direction control device 1 of this embodiment can blow conditioned air in any direction by combining vertical air distribution by the louvers 15 and horizontal air distribution by the upstream louvers .

[0031] First, regarding the distribution of air in the left-right direction, when a user such as a passenger pinches the gripping portion 33 of the knob 31 of the louver 15b and slides the knob 31 left-right along the louver 15b, the louver connecting portion 35 of the knob 31 comes into contact with the shaft portion 43 of the upstream louver 36 located in the center in the left-right direction, causing the upstream louver 36 located in the center in the left-right direction to rotate left-right. In conjunction with this rotation, the other upstream louvers 36 rotate in the same direction, causing the air-conditioned air to be rectified left-right along the rectifying surface of the upstream louver 36 and to be blown out at an angle left-right from the air outlet 7.

[0032] In addition, for vertical air distribution, when a user such as a passenger pinches the gripping portion 33 of the knob 31 of the louver 15b and moves the knob 31 vertically together with the louver 15b, the louver 15b rotates vertically, and in conjunction with this rotation, the louvers 15a and 15c rotate in the same direction, so that the air-conditioned air is rectified vertically along the rectifying surface of the louver 15 and is blown out vertically from the air outlet 7.

[0033] At this time, if the force maintaining the vertical orientation of louver 15, for example, the heaviest louver 15b, decreases due to some cause, such as changes in dimensions and physical properties due to temperature changes or changes over time, then because the rotation axis A and the center of gravity G are separated, louver 15b will attempt to rotate upward with the center of gravity G side lowering.

[0034] In this embodiment, the reaction force applying means 20 applies a reaction force to the weight of the louver 15b that occurs on the center of gravity G side of the rotation axis A. Therefore, even if the force maintaining the orientation of the louver 15b is reduced due to the causes described above, the reaction force applied by the reaction force applying means 20 can suppress unintentional rotation of the louver 15 due to the weight of the louver 15b, and the posture of the louver 15 linked to the louver 15b can be maintained.

[0035] Specifically, when louver 15b attempts to rotate upward, connecting portion 27 of louver 15a, which also attempts to rotate upward in conjunction with this, drops, causing the other arm 26 of reaction force applying means 20, which is a torsion spring connected to connecting portion 27, to attempt to lower its position, causing main body 22 to be twisted in the direction of compression, generating a repulsive force. Thus, an upward force is generated on louver 15a via connecting portion 27, causing louver 15b, which is linked to louver 15a, to attempt to return to a position balanced with its weight, that is, louver 15b is in a position aligned with wind axis W, thereby preventing louver 15 from changing direction to a position where it is oriented maximum upward.

[0036] Furthermore, when the user operates the knob 31 to rotate the louver 15 upward, if the reaction force applying means 20 were not present, the weight of the louver 15 (louver 15b) would make the operation lighter than when rotating it downward. However, in this embodiment, a force is required to compress the reaction force applying means 20, so the lighter operating force is supplemented by the force compressing the reaction force applying means 20, and an operating force close to the preset operating force value can be obtained.

[0037] On the other hand, when the user operates the knob 31 to rotate the louver 15 downward, if the reaction force applying means 20 were not present, the weight of the louver 15 (louver 15b) would be lifted, making it heavier than when rotating it upward. However, in this embodiment, the reaction force applying means 20 applies a reaction force to balance the weight of the louver 15 (louver 15b) when the louver 15 is in the neutral position, i.e., when the louver 15 is in an orientation along the wind axis W, when the louver 15 is pointing downward from the neutral position, the reaction force that can be applied by the reaction force applying means 20 acts in a direction to assist the operation until the reaction force applying means 20 returns to its natural state, so that the heavier operating force is canceled out by the reaction force applied by the reaction force applying means 20, and an operating force close to the preset operating force value can be obtained.

[0038] Therefore, the difference in operating force when rotating the louver 15 in the direction of gravity and when rotating it in the opposite direction can be reduced, which is expected to improve the operating feel and stabilize the operating load.

[0039] Furthermore, by using a torsion spring as the reaction force applying means 20, attaching a coil-shaped main body 22 to the pivot axis 17 of the louver 15a, holding one arm 23 extending from one end of the main body 22 to the side frame 5, and attaching another arm 26 extending from the other end of the main body 22 to the connection part 27 of the louver 15, the reaction force applying means 20 that applies a reaction force against the weight of the louver 15 (louver 15b) can be realized with a simple configuration.

[0040] Furthermore, the reaction force applying means 20 can balance the weight of the louver 15 (louver 15b) and the reaction force of the reaction force applying means 20 at any position by setting the spring constant, and the operating force can be set as desired, providing a high degree of freedom in assisting the operating force.

[0041] In the first embodiment, the reaction force applying means 20 may be a tension spring, a compression spring, a spiral spring, or the like, in addition to a torsion spring, depending on the installation position.

[0042] Next, a second embodiment will be described with reference to Fig. 5. Note that the same components and functions as those in the first embodiment will be denoted by the same reference numerals and the description thereof will be omitted.

[0043] In this embodiment, reaction force applying means 20 is an elastic member having one end attached to rotation shaft 17 of louver 15 and the other end attached in a rotationally prevented state to side frame portion 5 of case body 3. Reaction force applying means 20 twists as louver 15 rotates, and utilizes the repulsive force generated by this twisting as a reaction force to be applied to louver 15. Note that although only one rotation shaft 17 is shown in the figure, the other rotation shaft 17 may also have a similar configuration.

[0044] The rotation stopper 50 is formed at the tip of the rotation shaft 17. The rotation stopper 50 prevents one of the rotation shaft 17 and the reaction force applying means 20 from rotating circumferentially relative to the other so that the reaction force applying means 20 does not spin freely around the rotation shaft 17 when the louver 15 rotates. The shape of the rotation stopper 50 may be any shape as long as it can prevent one of the rotation shaft 17 and the reaction force applying means 2 from rotating relative to the other, that is, as long as it has multiple regions at different distances from the rotation axis A. In this embodiment, the rotation stopper 50 is formed in a semi-cylindrical shape. In other words, the rotation stopper 50 has a shape that leaves only one side of the tip of the rotation shaft 17 in a plane that includes the rotation axis A.

[0045] The reaction force applying means 20 is made of, for example, rubber. In this embodiment, the reaction force applying means 20 is formed in a cylindrical shape having a diameter equal to (or approximately equal to) that of the rotation shaft 17. A first fitting portion 52 that fits into the anti-rotation portion 50 is formed at one end of the reaction force applying means 20. The first fitting portion 52 has a cylindrical shape that complements the anti-rotation portion 50.

[0046] Further, a second fitting portion 53 is formed at the other end of the reaction force applying means 20. The second fitting portion 53 is held in a receiving portion 55 formed on the side frame portion 5. The second fitting portion 53 prevents the reaction force applying means 20 from rotating circumferentially relative to the side frame portion 5 (receiving portion 55) so that the reaction force applying means 20 does not rotate freely relative to the side frame portion 5 (receiving portion 55) when the louver 15 rotates. The shape of the second fitting portion 53 may be any shape as long as it can prevent the reaction force applying means 20 from rotating relative to the side frame portion 5 (receiving portion 55), that is, as long as it has a plurality of regions at different distances from the rotation axis A. In this embodiment, the second fitting portion 53 is formed in a semi-cylindrical shape. That is, the second fitting portion 53 has a shape that leaves only one side of the other end of the reaction force applying means 20 in a plane including the rotation axis A.

[0047] The receiving portion 55 has a shape that allows it to be fitted into the second fitting portion 53. In this embodiment, the receiving portion 55 is formed in a semicircular shape. The receiving portion 55 is formed as a through-hole that penetrates the side surface portion 10 of the side frame portion 5.

[0048] In this embodiment, when the force maintaining the vertical orientation of the louver 15 decreases for some reason and the center of gravity G of the louver 15 drops and attempts to rotate upward, the reaction force applying means 20 twists, generating a repulsive force, which applies a reaction force in a direction that maintains the posture of the louver 15 against the weight of the louver 15.Therefore, the reaction force applied by the reaction force applying means 20 can suppress unintended rotation due to the weight of the louver 15 with a simple configuration, and the posture of the louver 15 can be maintained, thereby achieving the same effects as the first embodiment.

[0049] Furthermore, the reaction force applying means 20 allows the operating force to be set arbitrarily by selecting characteristics such as the elasticity of the elastic member, and thus provides a high degree of freedom in assisting the operating force.

[0050] In each of the above embodiments, the reaction force applying means 20 may be attached directly to the louver 15 that is intended to rotate upward by its weight. In particular, when there is a single louver 15, the reaction force applying means 20 may be attached directly to that louver 15. Also, when there are multiple louvers 15 that are linked to each other by link bodies 16, the reaction force applying means 20 may be attached to at least one of the louvers 15 so that a reaction force against the weight of the louver 15 acts on the multiple louvers 15 as a whole.

[0051] In the case where the reaction force applying means 20 is not directly attached to the rotation shaft 17, the rotation shaft 17 may be formed on the side frame portion 5 of the case body 3 instead of being formed on the louver 15. In other words, the louver 15 may be rotatably connected to the rotation shaft formed on the side frame portion 5.

[0052] Furthermore, the airflow direction adjustment device 1 is not limited to being used in automobiles, and may be used for any other purposes. [Industrial Applicability]

[0053] The present invention can be suitably used as, for example, a wind direction adjusting device for an air conditioner in an automobile. [Explanation of symbols]

[0054] 1 Wind direction adjustment device 5. Side frame portion as holding portion 15 Louver 17 Rotating shaft 20 Reaction force applying means 22 Main body 23 First Arm 26 Other arms 27 Connection A Rotation axis G center of gravity

Claims

1. A wind direction adjustment device comprising a louver and a holding part that rotatably holds the louver, The pivot axis of the louver is located away from the center of gravity of the louver; a reaction force applying means for applying a reaction force to the weight of the louver generated on the center of gravity side with respect to the rotation axis, The louver has a rotation axis and a connection portion located away from the rotation axis toward the center of gravity, The reaction force applying means is a torsion spring having a coil-shaped main body attached to the rotation shaft, one arm extending from one end of the main body and held by the holding portion, and another arm extending from the other end of the main body and attached to the connecting portion. A wind direction adjustment device characterized by:

2. The reaction force applying means applies a reaction force so as to balance the weight of the louver in the neutral position.

2. The airflow direction adjusting device according to claim 1.

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