JP6727857B2 - Case body and louver device including the same - Google Patents

Description

The present invention relates to a case body and a louver device including the case body.

In Patent Document 1 below, an arm (first louver support member) that supports the wind direction plate (louver 5) along an arcuate cam surface (guide surface 322e) provided on the case (second case 312, 322) is disclosed. 21. A louver device (louver device 1) that reciprocates an arm between a retracted position and an advanced position by sliding a cam follower portion (arc portion 213, 223) of a second louver support member 22) is disclosed. ing.

JP, 2009-210207, A

In the louver device of Patent Document 1, the arm supporting the wind direction plate is moved to the forward position, and the wind direction plate is rotated away from the air conditioner body. Therefore, in the louver device of Patent Document 1, the arm is easily touched by the user, and the arm is required to have high designability. Particularly, when the arm is formed by fitting a plurality of case members in order to arrange a drive source such as a motor in the arm, the locking portions of these case members are provided at positions visible to the user. Then, there is a problem that the exposed locking portion impairs the design of the arm.

Further, in the louver device of Patent Document 1, when the arm is moved to the forward position, the load of the arm and the wind direction plate is applied to the base end portion of the arm and the case (the first fixed body 31, the second fixed body 32). It must be supported only near the opening. In particular, one of the arms (first louver support member 21) is provided with a motor (second motor 81) for rotating the wind direction plate at the tip thereof, and further, the wind pressure received by the wind direction plate. Increase the applied load. In order to prevent the damage and deformation of the stress-supporting portion where the stress is concentrated, the arm and the case of Patent Document 1 need to have appropriate rigidity, which makes it difficult to downsize the members.

In view of the above problem, the problem to be solved by the present invention is to provide a case body whose design is improved by providing the locking portion of the case member invisible from the outside, and a wind direction plate including the case body. Another object of the present invention is to provide a louver device capable of dispersing and supporting the load of the arm.

In order to solve the above-mentioned problems, a case body of the present invention includes a first case member and a second case member that are fitted to each other, and an inner surface of the first case member has a distal end with the inner surface as a base end. A lock piece that is a protrusion protruding inside the first case member is formed, and a lock hole that is a through hole that engages with the lock piece is formed in the second case member. The thickness of the lock piece in the fitting direction of the first case member with respect to the second case member is formed such that the tip side is thinner than the base end side, and the thickness from the base end to the tip of the lock piece is smaller. length, when the first case member and the second case member is fitted, the length der penetrating the lock hole is, housed together with the motor within the case body of the case, in the the case A spacer member for fixing the position of the motor is further provided, and when the direction along the axial direction of the motor is the vertical direction in the case, the spacer member holds down the end surface on the output shaft side of the motor. The vertical position of the motor in the case is fixed, and the motor has a bearing portion that extends in a cylindrical shape from the end surface along the outer peripheral surface of the output shaft, and the spacer member includes: A bearing fixing hole, which is a through hole into which the bearing portion of the motor is press-fitted, is formed, a gap is provided around the outer peripheral surface of the motor in the case, and the spacer member is provided in the case. The circumferential angle and radial position are fixed, and the motor is a motor having a support shaft that is a rod-shaped body that extends vertically from the end surface, and the support shaft of the motor is press-fitted into the spacer member. A supporting shaft fixing hole that is a through hole is formed, and in the motor, the bearing portion of the motor is in the bearing fixing hole of the spacer member, and the supporting shaft of the motor is the supporting member of the spacer member. It is characterized in that the angle in the circumferential direction and the position in the radial direction in the case are fixed by being press-fitted into the shaft fixing holes, respectively .

With the configuration in which the lock piece and the lock hole for locking the first case member and the second case member are arranged inside the case body, these can be hidden from the outside, and the design of the case body can be improved. Can be increased.

Usually, in a locking structure using a lock piece and a lock hole, the lock piece is set to a size that does not penetrate the lock hole. This is because, if the lock piece penetrates the lock hole, the tip of the lock piece may damage an item contained in the case. Since the lock hole of the present invention is arranged inside the case body rather than the lock piece, for example, when the contents in the case are close to the lock hole, the displacement of the lock hole to the inside of the case is limited. It If a hook with a normal height is used in this situation, the tip of the lock piece may ride on the edge of the lock hole, and the case may not be locked no matter how many cases are fitted. On the other hand, in order to make it easier for the lock piece to enter the lock hole, change the design so that the position of the lock hole is closer to the lock piece, or change the design so that the position of the lock piece is closer to the lock hole. The case body is not fixed sufficiently, which causes rattling of the case body.

Since the lock piece of the present invention is intentionally set to the length (height) that penetrates the lock hole, the deformation amount of the first case member when the case body is fitted becomes large, and the lock piece is locked. It will be pressed strongly into the hole. Further, since the lock piece of the present invention is shaped such that the thickness of the tip end is smaller than that of the base end, the tip end of the lock piece is easily bent. Accordingly, the case body of the present invention can avoid the problem that the lock piece easily enters the lock hole and the case body is not locked even when the displacement of the lock hole to the inside of the case is limited. ing. Further, normally, in a motor, although the molding accuracy of the space inside the motor case is high, it is expected that a larger error will appear on the outer surface of the motor case than on the inner surface, such as variation in the thickness of the motor case among individuals. Therefore, when positioning the motor inside the case body by, for example, supporting the outer peripheral surface of the motor case, the motor may not fit in the case body, or conversely, the motor may rattle. .. The case body of this configuration is provided with a spacer member for positioning the motor in the case separately, and the vertical position of the motor in the case is fixed by using the spacer member. By supporting the motor with a bearing portion that has a small influence, it is possible to absorb an error that appears on the outer surface of the motor case. Furthermore, by supporting two points of the motor bearing and the support shaft with a spacer member fixed in the case, not only the vertical position of the motor and the position of its output shaft in the case, but also the circumferential angle of the motor Can also be fixed. As a result, it is possible to fix the absolute position of the motor in the case while absorbing the error that appears on the outer surface of the motor case, and it is possible to suppress the noise and the shortening of the component life due to rattling of the motor.

Further, when the length from the base end to the tip of the lock piece is taken as the height of the lock piece, the first case member is elastic in the height direction of the lock piece in the height direction of the lock piece. It is preferably made of a deformable flexible material. Further, it is preferable that the first case member is made of a resin material.

By using a flexible material such as a resin material for the first case member, fitting using deformation of the first case member becomes possible.

In order to solve the above problems, a louver device of the present invention includes a first drive source, a link mechanism that swings by the driving force of the first drive source, and a fixing portion that can house the link mechanism, The link mechanism includes an arm member having the case body of the present invention , and a plurality of link members that support the arm member and reciprocate the arm member in the extending direction and the storing direction. The link member has a drive link driven by the first drive source, and a driven link that follows the operation of the drive link via the arm member, and the drive link has the tip end side of the drive link. The arm member has a base end side connected to the first drive source directly or via another member, and the driven link has a tip end side connected to the arm member and a base end side connected to the fixed portion. A wind direction plate, which is a plate-shaped member, is rotatably connected to an end portion of the arm member on the extending direction side .

By reciprocally moving the arm member that opens and closes the wind direction plate by the link mechanism, the load of the wind direction plate and the arm member can be dispersed to each link member. As a result, it is possible to prevent the stress supporting the load from concentrating only on one part, and it is possible to reduce the size of the entire device.

Further, it is preferable that the link mechanism is a four-joint link mechanism that uses the arm member as an intermediate link, and the driven link is arranged on the extension direction side of the arm member with respect to the drive link.

By making the link mechanism a four-bar link, the reciprocating movement of the arm member by the link mechanism can be realized with a minimum number of parts. Further, since the driven link does not need to be connected to the first drive source, there are less restrictions on the location of the driven link as compared with the drive link. Therefore, by disposing the driven link on the extension direction side of the arm member with respect to the drive link, the driven link can be disposed on the end portion on the extension direction side of the device, and the arm member can be supported farther. Is possible.

A second drive source is arranged at an end of the arm member on the extension direction side , and the wind direction plate is rotatable within a predetermined angle range by a driving force of the second drive source. Is preferred.

By rotating the wind direction plate by the second drive source provided at the side end portion in the extending direction of the arm member, more complicated operation of the wind direction plate can be performed, and the degree of freedom in controlling the wind direction can be increased.

Further, the second drive source is preferably a stepping motor.

The stepping motor can rotate in both forward and reverse directions, and its rotation angle can be calculated from the number of steps. Therefore, it is not necessary to separately perform feedback control by a rotary encoder or the like in order to detect the arrangement angle of the wind direction plate at each time. As a result, it is possible to reduce the number of parts in the entire device and reduce the size of the device.

According to the case body and the louver device including the case body of the present invention, the design of the case body can be improved, and the loads of the wind direction plate and the arms can be dispersed and supported.

It is an appearance perspective view showing an example of arrangement composition of a louver device. It is an exploded perspective view showing an internal structure of a louver device. It is an exploded perspective view showing an internal structure of an arm. FIG. 3 is a transparent view showing a meshing structure of a reduction gear train. It is an appearance perspective view and a sectional view of the 1st reduction gear. It is explanatory drawing which shows the reciprocating motion of the arm by a link mechanism. It is explanatory drawing which shows the structure of a 1st rocking|fluctuation control part. It is a figure explaining the routing structure of the lead wire of a 2nd motor. It is an exploded perspective view showing the internal structure of a support unit. It is explanatory drawing which shows the reciprocating motion of the arm by a support unit. It is explanatory drawing which shows the reciprocating motion of the arm in a louver apparatus. It is explanatory drawing of the case body locking structure using a hook part and a lock hole.

Embodiments of a louver device according to the present invention will be described below with reference to the drawings. The louver device according to the present embodiment is a device that is installed at a blower opening of an air conditioner (not shown) and controls the wind direction thereof. In the following description, the "width direction" means the X direction shown on the coordinate axis display in FIG. 1, the "front-back direction" means the Y direction shown on the same coordinate axis display, and the "vertical direction" means the same coordinate axis table. The Z direction shown in FIG.

(overall structure)
FIG. 1 is an external perspective view showing an example of the arrangement of the louver device. In the arrangement example of FIG. 1, one common wind direction plate 91 is two louver devices 10 and 10 ′ and one support unit 70 (hereinafter, these are also collectively referred to as “louver device 10 and the like”). ) Support. The two louver devices 10 and 10' are the same device, and the configuration of the louver device 10 described below is also the configuration of the louver device 10'. All of these louver devices 10 and the like are arranged behind the airflow direction plate 91 (on the side of the casing of an air conditioner (not shown)). The louver devices 10 and 10 ′ are arranged near both ends of the wind direction plate 91 in the longitudinal direction, and the support unit 70 is arranged at substantially the center in the longitudinal direction.

On the surface of the wind direction plate 91 facing the louver device 10 and the like, arm connection pieces 911 and 912, which are connecting portions with the louver device 10 and the like, are formed. The wind direction plate 91 is supported by the arms 42, 72 by connecting the arm connection pieces 911, 912 to the wind direction plate connection portions 262, 721 provided on the arms 42, 72 of the louver device 10 and the like. It operates integrally with these arms 42 and 72.

The louver devices 10 and 10 ′ are drive devices that open and close and rotate the wind direction plate 91 by the driving force of the drive source included in the louver devices 10 and 10 ′. On the other hand, the support unit 70 is an auxiliary unit that supports the wind direction plate 91 by following the operations of the louver devices 10 and 10'. Even when the length of the wind direction plate 91 in the longitudinal direction is short, or even when the louver devices 10 and 10' support only both ends of the wind direction plate 91, the wind direction plate 91 has rigidity such that the wind direction plate 91 does not bend due to its own weight. In some cases, the support unit 70 may be omitted.

(Internal structure of louver device)
FIG. 2 is an exploded perspective view showing the internal structure of the louver device 10 (and the louver device 10'). The louver device 10 includes a first motor 20 (first drive source) that is a stepping motor, a link mechanism 40 that swings by the driving force of the first motor 20, and a link mechanism 40 that reduces the rotation of the first motor 20. And a case 50 (fixed portion) that accommodates the link mechanism 40 and the reduction gear train 30.

The link mechanism 40 includes two link members 41 and an arm 42 (arm member) supported by these link members 41 and reciprocating in an extending direction A and a storing direction B (see FIG. 6) described later. ing. The link member 41 includes a drive link 411 driven by the first motor 20 and a driven link 412 that follows the operation of the drive link 411 via the arm 42. In addition to the drive link 411 and the driven link 412, the link mechanism 40 constitutes a four-bar linkage mechanism in which the case 50 is a fixed link and the arm 42 is an intermediate link.

The case 50 includes a first case half body 51, a second case half body 52, and an intermediate plate 53 that can be disassembled in the width direction X. The first case half body 51, the second case half body 52, and the intermediate plate 53 are integrated by being coupled with a set screw 59. The link mechanism 40 is arranged in a space defined by the first case half body 51 and the intermediate plate 53, and the reduction gear train 30 is arranged in a space defined by the second case half body 52 and the intermediate plate 53.

The first motor 20 is arranged outside the bottom surface (the surface orthogonal to the width direction X) of the second case half body 52, and is fixed to the second case half body 52 by the set screw 29. At the portion corresponding to the position of the pinion gear 21 of the first motor 20 on the bottom surface of the second case half body 52, a lidded cylindrical shape protruding toward the opening side of the second case half body 52 (inside of the case 50). The pinion cover part 521 is provided. The pinion cover portion 521 has an opening on the side of the pinion gear 21, and the pinion gear 21 is housed inside the pinion cover portion 521. The pinion cover part 521 is provided with a window part 521a which is an opening part of which is cut out in the circumferential direction, and the pinion gear 21 accommodated in the pinion cover part 521 has a tooth part of a part thereof. Is exposed from the window portion 521a to the inside of the second case half body 52.

The reduction gear train 30 is a train of compound gears each having a large diameter gear portion and a small diameter gear portion. Each gear member of the reduction gear train 30 is rotatably supported by a support shaft 36 provided upright between the second case half body 52 and the middle plate 53. The reduction gear train 30 decelerates the rotation of the pinion gear 21 by sequentially transmitting the rotation of the pinion gear 21 of the first motor 20 from the large diameter gear portion to the small diameter gear portion, and transmits the rotation to the gear portion 411c of the drive link 411. To do. By decelerating the rotation of the first motor 20 and transmitting the decelerated rotation to the drive link 411, the arm 42 can be reciprocated using a motor having a general output.

A through hole 411b penetrating in the width direction X is formed at the base end portion (base end side) of the drive link 411 that constitutes the link mechanism 40, and the support shaft erected on the second case half body 52 is provided. By inserting 522 into the through hole 411b, the base end of the drive link 411 is rotatably supported by the case 50.

A gear portion 411c extending toward the reduction gear train 30 side is provided at the base end portion of the drive link 411. A notch portion 533 through which the gear portion 411c is inserted is formed in a portion of the intermediate plate 53 corresponding to the position of the gear portion 411c. The gear portion 411c is inserted into the cutout portion 533, penetrates the intermediate plate 53, and meshes with the final gear of the reduction gear train 30. By the gear portion 411c meshing with the final gear of the reduction gear train 30, the driving force of the first motor 20 is transmitted to the drive link 411 via the reduction gear train 30 and the gear portion 411c.

The driven link 412 of the link mechanism 40 is provided with a substantially cylindrical shaft body 412b whose axis is parallel to the width direction X at its base end (base end side). Bearings 513 and 523, which are circular through-holes penetrating in the width direction X, are formed at portions of the first case half body 51 and the second case half body 52 corresponding to the positions of the shaft bodies 412b. The driven link 412 is rotatably supported by the case 50 by fitting the shaft body 412b into the bearings 513 and 523.

The “base end” of the link member 41 (driving link 411, driven link 412) according to the present invention is a fixed joint, that is, fixed at a predetermined position and allowed to rotate, but in the vertical direction Z and the front-back direction Y. Refers to an end of which the swing is restricted, and the “tip” refers to a free joint, that is, an end where rotation and swing are allowed.

Further, in the present embodiment, the base ends of the drive link 411 and the driven link 412 are both supported by the case 50, but these base ends need not necessarily be supported by the case 50. For example, a member (fixed portion) whose position is fixed, such as a housing of an air conditioner (not shown), which can rotatably support the base end portion and is deformed by the load of the arm 42 and the wind direction plate 91. The case 50 can be replaced by any member having rigidity that does not occur.

(Internal structure of arm)
FIG. 3 is an exploded perspective view showing the internal structure of the arm 42. The arm 42 includes an arm case 42a that is a case body of the arm 42. The arm case 42a is composed of a first arm half body 421 which is a first case member and a second arm half body 422 which is a second case member fitted in the width direction X. At the ends of the first arm half body 421 and the second arm half body 422 on the extension direction A side, hook portions 426 and lock holes 427 for locking the fitted end portions are provided, respectively. The first arm half body 421 and the second arm half body 422 are fixed to the hook portion 426 and the lock hole 427 and three setscrews 429.

A motor chamber 43 that accommodates the second motor 25 that is the second drive source is provided at the end of the arm case 42a on the extension direction A side and in the vicinity thereof. The second motor 25 is a stepping motor that rotates the wind direction plate 91 within a predetermined angle range. A pinion gear 261 is attached to the D-cut output shaft 253 of the second motor 25. Further, a wind direction plate connecting portion 262 is rotatably supported by a support shaft 252 (described later), which is a rod-shaped body fixed to the second motor 25 immovably and extending parallel to the axial direction of the output shaft 253. The rotation of the pinion gear 261 is decelerated via the gear portion 262a of the wind direction plate connecting portion 262 and transmitted to the wind direction plate connecting portion 262. In the present embodiment, since the wind direction plate connecting portion 262 is supported by the support shaft 252 fixed to the second motor 25, the relative positional relationship of the wind direction plate connecting portion 262 with respect to the output shaft 253 is kept constant. Is dripping As a result, the meshing accuracy of the pinion gear 261 and the gear portion 262a of the wind direction plate connecting portion 262 is improved, and the noise due to rattling of these gear members and the reduction of component life are suppressed.

A circular opening 422a penetrating in the width direction X is formed in a portion of the second arm half 422 that constitutes the motor chamber 43, and the wind direction plate connecting portion 262 extends from the opening 422a to the outside of the arm case 42a. Is exposed to. Accordingly, the wind direction plate connecting portion 262 of the arm 42 and the arm connection piece 911 of the wind direction plate 91 can be coupled. By configuring the wind direction plate 91 to be rotated by the second motor 25, more complicated operation of the wind direction plate 91 is possible, and the degree of freedom in controlling the wind direction is increased.

A corrugated rib 423 is provided inside a portion of the arm case 42a on the storage direction B side of the motor chamber 43, and the rigidity of the arm case 42a is enhanced by the rib 423. In addition, a part of the rib 423 also serves as an arm-side contact portion 67 of a second swing restricting portion 65 described later.

FIG. 8 is a view for explaining the structure for arranging the lead wire 93 of the second motor 25. The lead wire 93 connected to the connector 259 of the second motor 25 is drawn into the case 50 through a gap provided inside the arm 42 above the rib 423. The lead wire 93 drawn into the case 50 passes through the upper side of the drive link 411, is drawn into a guide piece 532 formed behind the middle plate 53 (left side in FIG. 8), and is guided by the guide piece 532. It is drawn out of the louver device 10 from the outlet 54. As shown in FIG. 8B, the outlet 54 is an opening defined by the first case half body 51 and the second case half body 52.

(Structure of spacer member)
The motor chamber 43 of the arm case 42a houses the second motor 25 and the spacer member 27 that fixes the position of the second motor 25 in the motor chamber 43. The spacer member 27 includes a substantially disk-shaped flat plate portion 271 and a pair of side plate portions 272 extending from the peripheral edge of the flat plate portion 271 toward the second motor 25. The pair of side plate portions 272 are formed in line symmetry positions and ranges on the periphery of the flat plate portion 271.

A direction along the axial direction of the second motor 25 (a direction parallel to the width direction X in the present embodiment) is a vertical direction inside the motor chamber 43 (the first arm half body 421 side is “down”, the second arm half). The side of the body 422 is referred to as “upper.” Hereinafter, in the description of the inside of the motor chamber 43, “upper” and “lower” refer to the same vertical direction.), and the flat plate portion 271 of the spacer member 27. Covers the upper surface 251 which is the end surface of the second motor 25 on the output shaft 253 side, and presses the upper surface 251 downward to fix the vertical position of the second motor 25 in the motor chamber 43. The pair of side plate portions 272 are not in contact with the inner peripheral surface of the second arm half body 422 and the outer peripheral surface 25a of the second motor 25, and a gap is provided between them. Further, the outer peripheral surface 25a of the second motor 25 and the inner peripheral surface 43a of the motor chamber 43 are not in contact with each other, and a gap is provided between them.

On the surface of the flat plate portion 271 of the spacer member 27 on the second arm half body 422 side, two substantially cylindrical detent sleeves 273 extending toward the second arm half body 422 side are formed. Each of the detent sleeves 273 is provided with a slit in a part of the circumferential direction thereof, which allows elastic deformation outward in the radial direction. On the inner surface of the motor chamber 43 of the second arm half body 422, detent pins 424, which are protrusions fitted to the detent sleeves 273, are formed at positions corresponding to the positions where the detent sleeves 273 are formed. There is. By fitting the anti-rotation pin 424 and the anti-rotation sleeve 273, the spacer member 27 has its circumferential angle and radial position (position in the direction perpendicular to the vertical direction) in the motor chamber 43. The same applies in)) is fixed.

A bearing portion 251a that extends in a cylindrical shape from the upper surface 251 along the outer peripheral surface of the output shaft 253 is formed on the upper surface 251 of the second motor 25, and is located at a position corresponding to the formation position of the bearing portion 251a on the flat plate portion 271. Has a bearing fixing hole 271a which is a through hole into which the bearing portion 251a is press fitted. Further, on the upper surface 251 of the second motor 25, a support shaft 252, which is a rod-shaped member extending vertically from the upper surface 251, is immovably fixed. A support shaft fixing hole 271b which is a through hole into which the support shaft 252 is press-fitted is formed. As described above, the spacer member 27 has a fixed position and angle in the motor chamber 43. In the second motor 25, the bearing portion 251a is press-fitted into the bearing fixing hole 271a of the spacer member 27 and the support shaft 252 thereof is press-fitted into the support shaft fixing hole 271b of the spacer member 27. The circumferential angle and the radial position in the motor chamber 43 are fixed. That is, the absolute position of the second motor 25 in the motor chamber 43 is fixed.

Normally, in a motor, although the molding accuracy of the space in the motor case is high, it is expected that the outer surface of the motor case will have a larger error than the inner surface due to variations in the thickness of the motor case for each individual. Therefore, when positioning the motor inside the case body by, for example, supporting the outer peripheral surface of the motor case, the motor may not fit in the case body, or conversely, the motor may rattle. .. In the motor chamber 43 of the present embodiment, a spacer member 27, which is separately provided in the motor chamber 43, is placed on the upper surface 251 of the second motor 25 while providing a gap around the outer peripheral surface 25a of the second motor 25. By fixing the absolute position of the second motor 25 in the motor chamber 43 using the bearing portion 251a and the support shaft 252, which have a small influence, the second motor 25 is absorbed while absorbing the error that appears on the outer surface of the second motor 25. It is said that it is possible to suppress the noise and the shortening of the life of parts due to 25 rattling.

(Arm case locking structure)
FIG. 12 is an explanatory diagram of a locking structure of the arm case 42a using the hook portion 426 and the lock hole 427. 12A is a plan view of the arm 42 seen from the second arm half 422 side, FIG. 12B is a sectional view taken along the line CC of FIG. 12A, and FIG. It is an enlarged view of the part enclosed with the broken line D of b).

As shown in FIG. 12( c ), the hook portion 426 is a projection portion whose distal end projects inside the motor chamber 43 with the inner peripheral surface 43 a of the motor chamber 43 of the first arm half body 421 as the base end. The second arm half 422 has a tongue-shaped stopper portion 422c at a position corresponding to the formation position of the hook portion 426, and the stopper portion 422c is a lock hole that is a through hole that engages with the hook portion 426. A hole 427 is formed. The hook portion 426 and the lock hole 427 are a pair of lock pieces and a lock hole that lock the end of the arm case 42a on the extension direction A side. Since the hook portion 426 and the lock hole 427 are arranged inside the arm case 42a, they are hidden from the outside and the design of the arm case 42a is enhanced.

The thickness of the hook portion 426 in the fitting direction (the width direction X in the present embodiment) of the first arm half body 421 and the second arm half body 422 is formed such that the tip end side is thinner than the base end side. ing. More specifically, in the hook portion 426, a surface corresponding to the upper surface of the hook portion 426 in FIG. 12C is formed as a tapered surface 426a which gradually lowers from the base end toward the tip.

In addition, a taper surface on which the taper surface 426a of the hook portion 426 rides when the first arm half body 421 and the second arm half body 422 are fitted is formed at the tip of the stopper portion 422c. When the length from the base end to the tip of the hook portion 426 is set to the height of the hook portion 426, the first arm half body 421 is elastically deformed in the height direction of the hook portion 426 by about the height of the hook portion 426. It is made of a resin material capable of

The height of the hook portion 426 in the present embodiment is a height that penetrates the lock hole 427. Usually, in a locking structure using a lock piece and a lock hole, the lock piece is set to a size that does not penetrate the lock hole. This is because, if the lock piece penetrates the lock hole, the tip of the lock piece may damage an item contained in the case. The lock hole 427 of the present embodiment is arranged inside the motor chamber 43 with respect to the hook portion 426. Further, the outer peripheral surface 25a of the motor 25 is close to the vicinity of the stopper portion 422c in which the lock hole 427 is formed, and displacement of the lock hole 427 into the motor chamber 43 is restricted. When a lock piece having a normal height is used in this situation, the tip of the lock piece may ride on the edge of the lock hole and the case body may not be locked no matter how many cases are fitted together. Since the hook portion 426 of the present embodiment is intentionally set to a height that penetrates the lock hole 427, the deformation amount of the first arm half body 421 when the arm case 42a is fitted is increased, and the hook portion 426 is increased. The 426 is strongly pressed against the lock hole 427. Further, since the hook portion 426 of the present embodiment is shaped so that the thickness of the tip end is thinner than the base end thereof, the tip end of the hook portion 426 is easily bent. As a result, in the arm case 42a of the present embodiment, although the displacement of the lock hole 427 (stopper portion 422c) inside the motor chamber 43 is limited, the hook portion 426 is easily pushed into the lock hole 427, It is possible to avoid the problem that the arm case 42a is not locked.

(Reduction gear train)
FIG. 4 is a transparent view showing the meshing structure of the reduction gear train 30. The tooth portions shown by the dotted lines in FIG. 4 represent the gear portions on the rear side in the figure of each gear member.

The tooth portion of the pinion gear 21 exposed from the window portion 521a of the pinion cover portion 521 meshes with the large-diameter gear portion of the first reduction gear 31 that constitutes the reduction gear train 30. After that, the small diameter gear portion of the first reduction gear 31 is the large diameter gear portion of the second reduction gear 32, the small diameter gear portion of the second reduction gear 32 is the large diameter gear portion of the third reduction gear 33, and the third reduction gear portion. The small-diameter gear portion 33 is in mesh with the large-diameter gear portion of the fourth reduction gear 34, and the small-diameter gear portion of the fourth reduction gear 34 is in mesh with the large-diameter gear portion of the fifth reduction gear 35. The small-diameter gear portion of the fifth reduction gear 35 meshes with the gear portion 411c of the drive link 411. As a result, the rotation of the first motor 20 is decelerated and transmitted to the drive link 411.

(Torque limiter mechanism)
Of the gear members of the reduction gear train 30, the first reduction gear 31 suppresses the transmission torque by consuming the excess torque by idling when the torque exceeding a predetermined threshold is applied. A gear member having an overload protection mechanism). As the predetermined threshold torque, a torque that can be determined to have a high probability of abnormality by appropriately adding a margin value to the upper limit value of the torque that can actually be transmitted to the first reduction gear 31 during normal operation of the louver device 10. Just set it.

FIG. 5 is an external perspective view of the first reduction gear 31 (FIG. 5A) and a cross-sectional view in the AA direction of the first reduction gear 31 shown in FIG. 5A (FIG. 5B). .. Hereinafter, in the description of the first reduction gear 31 and the torque limiter mechanism, “upper” and “lower” mean the upper and lower sides in FIGS. 5A and 5B, and “plan view” means the first reduction gear. A line-of-sight direction in which the first reduction gear 31 is looked downward from above 31.

The first reduction gear 31 is composed of an upper small diameter gear portion 311 and a lower large diameter gear portion 312 which are separate members. The small diameter gear portion 311 and the large diameter gear portion 312 are supported by a common shaft portion 314 and can rotate independently of each other. A coil spring 313 is disposed between the small-diameter gear portion 311 and the large-diameter gear portion 312 in a vertically compressed state. The coil spring 313 causes the small-diameter gear portion 311 to move upward, and the large-diameter gear portion 312. Is biased downwards.

The small-diameter gear portion 311 is biased upward by the coil spring 313 coming into contact with the lower surface thereof, and is also moved upward by the hook portion 314a extending radially outward from the vicinity of the upper end of the shaft portion 314. It has been stopped. Further, as shown in FIG. 5A, the opening 311a at the upper end of the small diameter gear 311 in which the hook 314a is arranged is formed in a cross shape in plan view. As a result, the hook portion 314a and the opening 311a engage with each other in the circumferential direction, and the small diameter gear portion 311 and the shaft portion 314 always rotate integrally in the circumferential direction.

The large-diameter gear portion 312 is press-fitted into the shaft portion 314, and a metal plate 315, which is an annular flat plate member, is coaxially arranged on the upper surface and the lower surface thereof. The large-diameter gear portion 312 is urged downward through the metal plate 315 by the coil spring 313 contacting the metal plate 315 arranged on the upper surface side of the large-diameter gear portion 312. Further, the metal plate 315 arranged on the lower surface side of the large-diameter gear portion 312 is placed on the upper surface of the enlarged diameter portion 314b formed in the vicinity of the lower end of the shaft portion 314. The downward movement of the large-diameter gear portion 312 is locked by the portion 314b. Therefore, the large diameter gear portion 312 is pressed against the enlarged diameter portion 314b by the biasing force of the coil spring 313. As a result, the large diameter gear portion 312 rotates together with the shaft portion 314 in the circumferential direction due to the friction resistance due to the press-fitting into the shaft portion 314 and the friction resistance due to being pressed against the expanded diameter portion 314b by the coil spring 313. To do.

Since the first reduction gear 31 is provided with the above-described configuration, the first reduction gear 31 and the large-diameter gear portion 312 are large in size with the small-diameter gear portion 311 (and the shaft portion 314) within a torque range in which they can be rotated by their frictional resistance. The radial gear portion 312 rotates integrally in the circumferential direction, and when a torque exceeding the frictional resistance is applied, one of the small diameter gear portion 311 (and the shaft portion 314) and the large diameter gear portion 312 idles.

Since the reduction gear train 30 has the first reduction gear 31 provided with the torque limiter mechanism, the wind direction plate 91 is manually opened and closed by the user while the first motor 20 is held, and the reduction gear train 30 and the link mechanism are provided. Even if an unexpected external force is applied to the power transmission member of the first motor 20 such as 40, it is possible to prevent the step-out of the first motor 20 and the damage of the power transmission member. Further, for example, in the initialization operation of the first motor 20, the first motor 20 is intentionally moved in the initial position direction of the drive link 411 in order to synchronize the recognition angle of the first motor 20 and the actual arrangement angle of the drive link 411. It is possible to reduce damage to the power transmission member and abnormal noise even when the step out is performed for several steps.

Further, as shown in FIG. 4, the first reduction gear 31 meshes with the pinion gear 21 of the first motor 20. The torque limiter mechanism of the present invention naturally operates when a torque larger than the transmission torque during normal operation is applied. Therefore, when the gear member (for example, the fifth reduction gear 35) having a large transmitted torque during normal operation is provided with the torque limiter mechanism, the protective effect can be obtained only when an external force (torque) larger than that is applied. By making the first reduction gear 31 having the smallest transmission torque in the reduction gear train 30 to have the torque limiter mechanism, it is possible to operate the torque limiter mechanism swiftly against an abnormality.

(Reciprocating movement of arm)
FIG. 6 is an explanatory diagram showing the reciprocating operation of the arm 42 by the link mechanism 40. FIG. 6A shows a state in which the arm 42 has moved to the limit in the storage direction B, and FIG. 6B shows a state in which the arm 42 has moved to the limit in the extension direction A.

As shown in FIGS. 2 and 6, the link mechanism 40 includes two link members 41 (driving link 411 and driven link 412) and reciprocating movement in the extending direction A and the storing direction B supported by these link members 41. And an arm 42 that operates. A second motor 25, which is a drive source for rotating the wind direction plate 91, is arranged at the end of the arm 42 on the extension direction A side.

The drive link 411 has a circular through hole 411a formed at the tip thereof, which penetrates in the width direction X. By inserting the support shaft 421a of the arm 42 into the through hole 411a, the tip end portion of the drive link 411 and the arm 42 are rotatably connected to each other. Further, as described above, the base end portion of the drive link 411 can be rotated in the case 50 by inserting the support shaft 522 of the second case half body 52 into the through hole 411b formed in the base end portion. Supported by. The gear portion 411c formed at the base end portion of the drive link 411 meshes with the fifth reduction gear 35 of the reduction gear train 30.

The driven link 412 is arranged on the extension direction A side of the drive link 411. A circular through hole 412a penetrating in the width direction X is formed at the tip of the driven link 412, and the support shaft 421b of the arm 42 is inserted into the through hole 412a, whereby the tip of the driven link 412 is inserted. And the arm 42 are rotatably connected to each other. Further, as described above, the base end portion of the driven link 412 is attached to the case 50 by fitting the shaft body 412b into the bearings 513 and 523 of the first case half body 51 and the second case half body 52. It is rotatably supported.

In the present embodiment, when the first motor 20 rotates in the CW direction, the drive link 411 also rotates in the CW direction, and the arm 42 moves in the extension direction A. When rotating in the CCW direction, the arm 42 also rotates in the CCW direction. The arm 42 moves in the storing direction B by rotating in the direction.

By reciprocating the arm 42 that opens and closes the wind direction plate 91 by the link mechanism 40, the load of the wind direction plate 91 and the arm 42 can be dispersed to each link member 41 (the drive link 411 and the driven link 412). As a result, it is possible to prevent the stress supporting the load from concentrating only on a part of the device, and the overall size of the device is reduced. Further, since the sliding portion of the link mechanism 40 is almost only the joint portion, the sliding resistance associated with the reciprocating movement of the arm 42 becomes relatively small.

A stepping motor is used as the first motor 20 of this embodiment. The stepping motor can rotate in both forward and reverse directions, and its rotation angle can be calculated from the number of steps. Therefore, it is not necessary to separately perform feedback control by a rotary encoder or the like in order to detect the arrangement angle of the drive link 411 at each time. As a result, the number of parts in the entire device is reduced and the device is downsized. This also applies to the second motor 25. The first drive source of the present invention does not necessarily have to be a stepping motor, and another motor can be used as long as it is a motor that can rotate in both forward and reverse directions. However, in that case, as described above, a separate position detection means such as feedback control may be required.

A rib 511 that supports the link member 41 in the width direction X (the axial direction of the indirect portion of each link member) is provided on the surfaces of the first case half body 51 and the intermediate plate 53 on the link mechanism 40 side (see FIG. 7 ). And ribs 531 (see FIG. 6) are formed. The ribs 511 and the ribs 531 are linearly extending ribs protruding toward the link mechanism 40 along the rotation locus of the link members 41. The link members 41 slidably contact the ribs 511 and ribs 531. There is.

By supporting each link member 41 with a linear rib, rattling of the link mechanism 40 in the width direction X is prevented, and sliding resistance with each link member 41 is reduced.

(Rotation restriction part)
The louver device 10 is provided with a rocking restricting portion that is a pair of locking portions that restrict the rockable range of the link mechanism 40 by contacting each other when the link mechanism 40 rocks to a predetermined position. There is. It should be noted that in the present embodiment, two types of rocking restricting portions, the first rocking restricting portion 60 and the second rocking restricting portion 65, are provided.

FIG. 7 is an explanatory view showing the structure of the first swing restricting portion 60. 7A shows a state in which the arm 42 has moved to the limit in the storage direction B, and FIG. 7B shows a state in which the arm 42 has moved to the limit in the extension direction A. The first case half body 51 in FIG. 7 is transparently displayed by a broken line.

The first rocking|fluctuation control part 60 consists of the protrusion part 61 formed in the drive link 411, and the contact part 62 formed in the 1st case half 51. The protrusion 61 is a substantially rectangular tubular engagement piece that protrudes from the drive link 411 in the width direction X (axial direction of the indirect portion of the drive link) toward the first case half body 51 side. The contact portion 62 is a rib-shaped engagement piece formed at a position where it abuts the protrusion 61 when the link mechanism 40 swings to a predetermined position. The formation position of the contact portion 62 can be appropriately determined according to the desired swing range of the link mechanism 40.

When the link mechanism 40 swings to a predetermined position, the protrusion 61 formed on the drive link 411 and the contact portion 62 formed on the first case half body 51 are brought into contact with each other, whereby the link is formed. The swingable range of the mechanism 40 can be limited to a desired range. Further, when the arm 42 is moved to the limit in the extension direction A side (that is, when the arm 61 is moved to a position where the protrusion 61 and the abutting portion 62 come into contact with each other), the protrusion 61 and the abutting portion 62 are used. Since the drive link 411 is supported by the first case half body 51 by this, the load of the arm 42 and the wind direction plate 91 can be further dispersed.

The second rocking|fluctuation control part 65 is from the opposing surfaces 66a and 67a of the bending part 66 of the driven link 412 bent to the inner side of the link mechanism 40 at the substantially L shape, and the arm side contact part 67 of the arm 42. (See FIG. 6). The bent portion 66 is bent at an angle at which the facing surfaces 66a and 67a contact each other when the arm 42 extends to a predetermined position in the extending direction A. The bending angle of the bending portion 66 can be appropriately determined according to the desired extension range of the arm 42.

FIG. 6B shows the arm 42 moved in the extension direction A. The extension range of the arm 42 of FIG. 6B is limited by the first swing restricting portion 60, and the second swing restricting portion 65 is not operating. However, when a larger load is applied to the arm 42 and the arm 42 bends downward, the movement of the arm 42 is restricted by the contact between the facing surfaces 66a and 67a. In this way, the driven link 412 supports the arm 42 not only on the connecting portion but also on the facing surfaces 66a and 67a, so that the load on the arm 42 and the wind direction plate 91 can be further dispersed.

In addition, in the present embodiment, the two types of rocking restricting portions are provided, but only one of these rocking restricting portions may be provided.

(Support unit)
FIG. 9 is an exploded perspective view showing the internal structure of the support unit 70. FIG. 10 is an explanatory diagram showing the reciprocal movement of the arm 72 by the support unit 70. The support unit 70 is an auxiliary unit that does not include a drive source and supports the wind direction plate 91 by following the operation of the louver devices 10 and 10'.

The support unit 70 has a case 71 composed of a first case half 711 and a second case half 712 that can be disassembled in the width direction X. An arm 72 and a driven link 73 are swingably supported by the case 71.

The structure and support structure of the driven link 73 are similar to those of the driven link 412 of the louver device 10. A drive source corresponding to the second motor 25 of the louver device 10 is not arranged in the arm 72, and the wind direction plate 91 rotates to the wind direction plate connecting portion 721 provided at the end portion on the extension direction A side of the arm 72. It is only combined as possible.

A pin 751 protruding toward the second case half body 712 side is formed at the base end of the arm 72 along the width direction X. The pin 751 is a cam follower that slides along a curved cam groove 752 provided on the second case half 712. The curved shape of the cam groove 752 is the same as the swing locus of the link mechanism 40 of the louver device 10. As a result, the arm 72 of the support unit 70 can reciprocate on the same locus as the arm 42 of the louver device 10, 10'.

The width of the support unit 70 in the width direction X is smaller than that of the louver devices 10 and 10', and is configured not to obstruct the air passage of the air conditioner. In the present embodiment, the use of the support unit 70 prevents the wind direction plate 91 from bending due to its own weight or wind pressure.

(Other embodiments)
A louver device 11 according to another embodiment of the present invention will be described below with reference to the drawings. In the following description, configurations having the same or the same functions as those in the previous embodiment will be denoted by the same reference numerals as those in the previous embodiment, and detailed description thereof will be omitted.

FIG. 11 is an explanatory diagram showing the reciprocating operation of the arm 42 in the louver device 11. 11A shows a state in which the arm 42 has moved to the limit in the storage direction B, and FIG. 11B shows a state in which the arm 42 has moved to the limit in the extension direction A.

The louver device 11 is provided with a braking mechanism that brakes the arm 42 by a braking spring 95 that is a coil spring. The braking spring 95 in the present embodiment is connected to the drive link 411 and the driven link 412, and when the arm 42 moves in the extension direction A, the elastic force of the braking spring 95 urges the driven link 412 to the storage direction B side. Thus, the movement of the arm 42 in the extension direction A is braked.

When the arm 42 is moved in the extension direction A, the load of the arm 42 and the wind direction plate 91 urges the arm 42 in the extension direction A side. In particular, when the wind direction plate 91 receives a large amount of wind pressure, its urging force is further increased. As a result, the stability of the opening/closing operation of the wind direction plate 91 may be impaired, the power transmission member of the first motor 20 may be damaged, and the first motor 20 may be out of step. By connecting each link member 41 with a braking spring 95 and braking the movement of the arm 42 in the extension direction A by its elastic force, such a problem can be prevented.

The target of connection of the braking spring 95 is not limited to the drive link 411 and the driven link 412, and the same effect can be obtained by connecting the case 50 and a part of the link mechanism 40.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the present invention.

For example, in the link mechanism 40 in the present embodiment, the four-bar linkage mechanism is adopted in order to realize the reciprocating movement of the arm member by the link mechanism with the minimum number of parts. More complicated operations may be possible.

10, 10' Louver device 20 First motor (first drive source)
25 Second motor (second drive source (motor))
25a Outer peripheral surface (outer surface of motor)
251 Upper surface 251a Bearing part 252 Support shaft 27 Spacer member 271 Flat plate part 272 Side plate part 271a Bearing fixing hole 271b Support shaft fixing hole 273 Detent sleeve 40 Link mechanism 41 Link member 411 Drive link 412 Driven link 42 Arm (arm member, intermediate link) )
42a Arm case (case body)
421 1st arm half body (1st case member)
422 Second arm half body (second case member)
422c Stopper part 424 Stop pin 426 Hook part (Lock piece)
427 Lock hole 43 Motor chamber 43a Inner peripheral surface (inner surface of first case member)
50 cases (fixed part)
91 Wind direction plate A Extension direction B Storage direction

Claims (7)

A case body comprising a first case member and a second case member which are fitted to each other,
A lock piece is formed on the inner surface of the first case member, the locking piece being a projection having a tip end protruding toward the inside of the first case member with the inner surface as a base end.
The second case member is formed with a lock hole that is a through hole that engages with the lock piece,
The thickness of the lock piece in the fitting direction of the first case member to the second case member is formed so that the tip side is thinner than the base end side,
The length to the tip from the base end of the locking piece, when the first case member and the second case member is fitted, Ri length der penetrating through the lock hole,
A spacer member that is housed in the case of the case body together with the motor and that fixes the position of the motor in the case;
When the direction along the axial direction of the motor is the vertical direction in the case,
The spacer member fixes the vertical position of the motor in the case by pressing the end surface of the motor on the output shaft side,
The motor is a motor having a bearing portion extending in a cylindrical shape from the end surface along the outer peripheral surface of the output shaft,
The spacer member has a bearing fixing hole that is a through hole into which the bearing portion of the motor is press-fitted,
A gap is provided around the outer peripheral surface of the motor in the case,
The spacer member is fixed in its circumferential angle and radial position in the case,
The motor is a motor having a support shaft that is a rod-shaped body extending vertically from the end surface,
The spacer member has a support shaft fixing hole which is a through hole into which the support shaft of the motor is press-fitted,
In the motor, the bearing portion of the motor is press-fitted into the bearing fixing hole of the spacer member, and the supporting shaft of the motor is press-fitting into the supporting shaft fixing hole of the spacer member. A case body having a fixed circumferential angle and radial position . When the length from the base end to the tip of the lock piece is the height of the lock piece,
The case body according to claim 1, wherein the first case member is made of a flexible material that is elastically deformable in a height direction of the lock piece at least about a height of the lock piece. The case body according to claim 2, wherein the first case member is made of a resin material. A first drive source,
A link mechanism swinging by the driving force of the first driving source,
A fixed part capable of accommodating the link mechanism,
The link mechanism includes an arm member having the case body according to any one of claims 1 to 3 , and a plurality of arm members that support the arm member and reciprocate the arm member in an extending direction and a storing direction. It has a link member of
The plurality of link members include a drive link driven by the first drive source, and a driven link that follows the operation of the drive link via the arm member,
The drive link has a tip end side connected to the arm member and a base end side connected to the first drive source directly or via another member,
The driven link has a tip end side connected to the arm member and a base end side connected to the fixed portion,
A louver device in which a wind direction plate, which is a plate-like member, is rotatably connected to an end portion of the arm member on the extending direction side . The link mechanism is a four-bar linkage using the arm member as an intermediate link,
The louver device according to claim 4, wherein the driven link is disposed on the extension direction side of the arm member with respect to the drive link. A second drive source, which is the motor, is arranged at an end of the arm member on the extending direction side ,
The louver device according to claim 4 or 5 , wherein the wind direction plate is rotatable within a predetermined angle range by a driving force of the second drive source. The louver device according to claim 6 , wherein the second drive source is a stepping motor.

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