JP2016027266A - Electric fan - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric fan in which a head part hardly wobbles when the head part is turned to an elevation angle of 90 degrees so that vertical oscillating action can be smoothly achieved without narrowing a turning range, even if a position of center of gravity of the head part deviates from a prescribed position due to irregularity in assembly or the like.SOLUTION: A vertical oscillation mechanism 24 includes: an oscillation motor 31 for oscillating a head part 2 in a vertical direction relative to a base; and a plurality of gears 32 and 33 meshed with each other and driven by the oscillation motor 31. The base supports the head part 2 turnably in the vertical direction around a turning shaft (shaft 34) along a lateral direction. The shaft 34 is positioned above a rotating shaft of a fan motor 23 along a longitudinal direction when the head part 2 is in a position of an angle of elevation of 0 degree.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a fan whose head can swing up and down.

  The electric fan includes a head having a fan and a base that supports the head, and a handle for carrying the electric fan is provided on the back of the head.

  Some electric fans have a vertical swing mode in which the head swings in the vertical direction. For example, in the electric fan disclosed in Patent Document 1, the head swings in the range of an elevation angle of 90 degrees to a depression angle of 15 degrees. In such a fan, if the operation stop operation or the operation to cancel the vertical swing mode is performed during the operation in the vertical swing mode, the head stops at the elevation angle at the time of the operation.

Design Registration No. 1459109

  However, when the head is stopped upward, it becomes difficult to hold the handle provided on the back surface of the head. In particular, as in Patent Document 1, in the case of a fan in which the maximum elevation angle of the movable range of the head is 90 degrees and the handle does not protrude radially from the outer periphery of the cover that covers the fan, the head has an elevation angle of 90 If it stops at a degree, it will not be possible to grab the handle.

  When the head stops with the head facing upward, the user must manually change the orientation of the head in order to hold the handle, but it requires some force to manually rotate the head. The burden increases. Further, when the head is manually rotated, a load is applied to the motor for swinging the head up and down, which may lead to a shortened life or failure of the motor.

  Then, an object of this invention is to provide the electric fan which can prevent that a head stops and it cannot stop gripping.

  A fan according to a first aspect of the present invention includes a fan, a fan guard that covers the fan, a fan motor that is disposed rearward of the fan guard and rotates the fan, a head having a vertical swing mechanism, and a horizontal direction And a base that supports the head so as to be pivotable in the vertical direction around the pivot axis. The vertical swing mechanism is configured so that the head is vertically oriented with respect to the base. A swing motor that swings and a plurality of meshing gears that are driven by the swing motor, and when the head is at a position of an elevation angle of 0 degrees, the rotation axis is along the front-rear direction It is located above the rotating shaft of the fan motor.

  In the electric fan according to a second aspect of the present invention, in the first aspect, the vertical rotation range of the head is such that the end of the fan motor on which the fan is fixed is always the center of the rotation axis. It is set so that it may be located ahead of the vertical plane passing through.

  The electric fan according to a third aspect is characterized in that, in the first or second aspect, the maximum elevation angle of the rotation range of the head in the vertical direction is 90 degrees.

(A) is the perspective view which looked at the electric fan which concerns on embodiment of this invention from the front, (b) is the perspective view seen from back. It is the figure which looked at the internal structure of the head from the side. It is the figure which looked at the internal structure of the head from back. It is the figure which abbreviate | omitted a part of arm from FIG. FIG. 5 is a view corresponding to FIG. 4 when the head is directed upward. It is an enlarged view of an operation panel. It is a functional block diagram of an electric fan. It is a flowchart which shows the operation | movement at the time of a driving | operation stop. It is a flowchart which shows the operation | movement at the time of a driving | operation start. It is a flowchart which shows operation | movement of turbo mode. It is a flowchart which shows operation | movement of a sensor mode. It is a flowchart which shows operation | movement of the electric fan which concerns on other embodiment of this invention.

Embodiments of the present invention will be described below.
As shown in FIG. 1, the electric fan 1 of the present embodiment has a head 2 and a base 3 that supports the head 2 so as to be rotatable in the vertical direction. It can swing in the left and right direction.

  The base 3 includes a stand base 4 placed on the floor, a fixed support 5 standing on the stand base 4, a slide support 6 slidable in the vertical direction with respect to the fixed support 5, and a slide support 6 And a connecting portion 7 that connects the head 2 to each other. A control device 8 is built in the stand base 4, and an operation panel 9 is provided on the upper surface of the stand base 4. Details of the control device 8 and the operation panel 9 will be described later.

  As shown in FIGS. 2 and 3, the connecting portion 7 includes an arm 11 that is rotatably connected to the upper end portion of the slide column 6 in the left-right direction, and the arm 11 is necked in the left-right direction with respect to the slide column 6. It has the left-and-right swing mechanism 12 (refer FIG. 2) to be swung, and the connection part cover 13 (refer FIG. 1) which covers these. The arm 11 is substantially U-shaped when viewed from the front-rear direction, and the upper part of the arm 11 is connected to the head 2. The left and right swing mechanism 12 is configured by a motor, a gear, and the like. 2 and 3, the connecting portion cover 13 is omitted, and the left and right swing mechanism 12 is omitted in FIG.

  As shown in FIGS. 2 to 4, the head 2 includes a fan 21 for blowing air, a fan guard 22 that covers the fan 21, a fan motor 23 that rotates the fan 21, a vertical swing mechanism 24, and a fan motor. 23 and a cover 25 that covers the vertical swing mechanism 24. A handle 26 used for carrying the electric fan 1 is attached to the upper surface of the cover 25. 2 and 3, a part of the cover 25 is omitted.

  The surface of the fan motor 23 on the fan 21 side is fixed to a pedestal 27, and plate portions 28 and 29 extending to the opposite side of the fan 21 are connected to the left and right ends of the pedestal 27. The two plate portions 28 and 29 are disposed inside the arm 11 and are rotatably connected to the arm 11. The vertical swing mechanism 24 is provided on the plate portion 28. In FIG. 4, a part of the arm 11 is omitted.

  The vertical swing mechanism 24 includes a swing motor 31, a motor gear 32, and a fixed gear 33.

  The swing motor 31 is a stepping motor and is fixed to a surface of the plate portion 28 that faces the plate portion 29. The rotation shaft of the swing motor 31 passes through the plate portion 28, and the motor gear 32 is fixed to the tip of the rotation shaft of the swing motor 31.

  The fixed gear 33 is rotatably connected to the plate portion 28 via the shaft 34. The fixed gear 33 has a fan-shaped gear portion 33a in a part of the outer peripheral portion. The fixed gear 33 is fixed to the arm 11 with a screw 35. In other words, the plate portion 28 is rotatably connected to the arm 11 (and the fixed gear 33) via the shaft 34.

  The gear portion 33 a of the fixed gear 33 and the motor gear 32 are engaged with each other, and the motor gear 32 moves in the vertical direction along the gear portion 33 a of the fixed gear 33 by driving the swing motor 31. Accordingly, as shown in FIG. 5, the head 2 rotates in the vertical direction with respect to the base 3 (and the fixed gear 33 and the arm 11) about the shaft 34. The head 2 can also be manually and forcibly turned up and down.

  The plate portion 28 is provided with projections 28 a and 28 b for restricting the movable range of the plate portion 28 with respect to the fixed gear 33. The protrusions 28a and 28b restrict the movable range of the head 2 in the vertical direction. The protrusion 28a is provided at a position where one end in the circumferential direction of the gear portion 33a of the fixed gear 33 abuts when the head 2 is at the maximum elevation angle (for example, an elevation angle of 90 degrees) (see FIG. 5). When the portion 2 has a maximum depression angle (for example, an inclination angle of 15 degrees), it is provided at a position where the other circumferential end of the gear portion 33a of the fixed gear 33 abuts.

  Moreover, the electric fan 1 is provided with the human detection sensor 14 which can detect a human body (moving body) (refer FIG. 7). For example, a current collecting sensor is used as the human detection sensor 14.

  Next, details of the operation panel 9 and the control device 8 will be described.

  As shown in FIG. 6, the operation panel 9 includes a power switch 41, an air volume switch 42, a turbo switch 43, a vertical swing switch 44, a left and right swing switch 45, a turn-off timer switch 46, an on timer switch 47, and a sensor switch. 48 is provided. In addition, the operation panel 9 is provided with a display unit 49 for displaying the set air volume, the set timer time, and the like.

  The power switch 41 is a switch for performing the operation start and operation stop. The air volume switch 42 is a switch for switching the air volume level. The left / right swing switch 45 is a switch for switching on / off of the left / right swing mode.

  The vertical swing switch 44 is a switch for switching ON / OFF of the vertical swing mode. The vertical swing mode is a mode in which the head 2 is swung vertically within a movable range (for example, an elevation angle of 90 degrees to a depression angle of 15 degrees) during driving.

  The left / right swing switch 45 is a switch for switching on / off of the left / right swing mode and selecting a swing angle (for example, 50 degrees, 70 degrees, 90 degrees). The left / right swing mode is a mode in which the head 2 is swung left and right at a set swing angle. Each time the user operates the left / right swing switch 45, the left / right swing angle can be switched in the order of 0 ° (left / right swing mode off), 50 °, 70 °, and 90 °.

  The turbo switch 43 is a switch for switching on / off of the turbo mode. The turbo mode is a mode in which an operation with an air volume (turbo air volume) larger than the maximum air volume that can be selected by the air volume switch 42 is performed for a predetermined time (for example, 3 minutes). During operation in the turbo mode, the up / down swing mode and the left / right swing mode are temporarily canceled.

  The off timer switch 46 is a switch for switching on / off of the off timer and selecting the off timer time. The off timer automatically stops operation when the set off timer time has elapsed. The on-timer switch 47 is a switch for switching on / off of the on-timer and selecting an on-timer time. The on-timer automatically starts operation when the set on-timer time elapses.

  The sensor switch 48 is a switch for switching on / off of the sensor mode. The sensor mode is a mode in which the operation is automatically stopped when a time during which the human detection sensor 14 does not detect the moving object continues for a predetermined time (for example, 5 minutes), and the operation is resumed when the moving object is detected.

  In addition, the electric fan 1 of the present embodiment has a memory function in which the same air volume and swing mode are automatically set at the start of operation by power-on operation or on timer operation.

  In addition, the electric fan 1 of the present embodiment moves the head 2 to a position where the elevation angle is 0 degrees (the position shown in FIGS. 2 and 4) when the operation is stopped by a power-off operation or a turn-off timer operation (this operation is referred to as a return operation). It has a return function. With this return function, it is possible to prevent the head 2 from being stopped upward and stopping the grip 26 when the operation is stopped. Further, when the driving is started with the vertical swing mode off, the head 2 is returned to the elevation angle immediately before the return operation is started. This operation is also due to the return function.

  While the head 2 is returning, the user is notified that the lamp of the display unit 49 blinks. Note that the notification means for notifying the user that the return operation is being performed is not limited to the above. For example, you may alert | report by sounds, such as a buzzer. In addition, it is not necessary to provide notification means for notifying that the return operation is being performed.

  The return function can be disabled by long pressing the air volume switch 42 and the vertical swing switch 44 simultaneously for several seconds while the operation is stopped. Further, the invalidation is canceled by performing the same operation in the invalidated state. The air volume switch 42 and the vertical swing switch 44 correspond to the switching operation unit of the present invention. Note that the operation means for switching whether to enable the return function is not limited to the above. For example, a dedicated switch may be provided on the operation panel 9. In this embodiment, the return function is automatically enabled when the plug is inserted. However, when the plug is inserted, the return function is invalid and can be switched by a switch operation. Good.

  The control device 8 includes a plurality of hardware such as a CPU (Central Processing Unit), a ROM (Read Only Memory), and a RAM (Random Access Memory), and the swing motor of the fan motor 23 and the vertical swing mechanism 24. 31, human detection sensor 14, various switches 41 to 48, and display unit 49.

  The ROM of the control device 8 stores a control program for controlling the operation of the control device 8. Then, by executing the control program, as shown in the functional block diagram of FIG. 7, the air blow control unit 51, the vertical swing control unit 52, the left and right swing control unit 57, the turbo mode control unit 53, the sensor mode Functions of the control unit 54, the timer control unit 55, the storage unit 56, and the like are exhibited. In the following description, the description about the left and right swing is omitted.

  The air blowing control unit 51 controls the fan motor 23.

  The vertical swing control unit 52 includes a vertical swing mode control unit 52 a and a return control unit 52 b that control the swing motor 31, and a determination unit 52 c that determines the elevation angle of the head 2.

  The vertical swing mode control unit 52a controls the vertical swing operation of the head 2 when the vertical swing mode is set. The vertical swing mode control unit 52a assumes that the elevation angle of the head 2 at the start of oscillation is 0 degrees, and swings the head 2 by the number of steps necessary to rotate the head 2 to the maximum elevation angle or the maximum depression angle. After the motor 31 is rotated, the swing motor 31 is reversed and rotated by the number of steps necessary to rotate it to the maximum depression angle or maximum elevation angle. By repeating this operation, the head 2 is swung within the movable range.

  The determination unit 52 c determines the elevation angle of the head 2 based on the number of steps of the swing motor 31.

  Note that when the head 2 is forcibly turned up and down manually, or when the elevation angle at the start of swinging is not 0 degrees, the elevation angle of the head 2 determined by the determination unit 52c and the actual elevation angle are determined. Although the angle of elevation is different, the coil of the oscillation motor 31 is energized when the head 2 is moved to the limit position of the movable range (when the fixed gear 33 contacts the projection 28a or the projection 28b). Since the motor 31 cannot rotate normally and only the magnetization of the coil is rotating (step-out state), the head 2 is held at the limit position of the movable range, so that the above-described deviation of both angles is performed. Can be eliminated.

  The return control unit 52b controls the swing motor 31 to move the head 2 to a position where the elevation angle is 0 degrees (return operation) when an operation stop instruction is issued by a power-off operation or a turn-off timer operation. In addition, the return control unit 52b controls the swing motor 31 to move the head 2 to the elevation angle immediately before starting the return operation when the operation is started with the vertical swing mode off after the return operation. .

  The turbo mode control unit 53 controls the operation in the turbo mode. When the turbo switch 43 is turned on, the turbo mode control unit 53 instructs the air blow control unit 51 to change the air volume of the fan 21 to the turbo air volume, and when the vertical swing mode is set. The vertical swing mode control unit 52a is instructed to stop the head 2. Further, the turbo mode control unit 53 counts the time since the turbo switch 43 is turned on, and when the count time reaches a predetermined time or when the turbo switch 43 is turned off, the turbo mode is controlled. The air flow control unit 51 is instructed to cancel and return the air volume to the original air volume. If the vertical swing mode is set before the turbo mode is set, the vertical swing mode control unit 52a is instructed to resume the vertical swing of the head 2.

  The sensor mode control unit 54 controls the operation in the sensor mode. The sensor mode control unit 54 counts the time during which the human detection sensor 14 does not continuously detect a person (moving body), and when the count time reaches a predetermined time, the air blow control unit 51 and the vertical swing mode control unit 52a. When the person detection sensor 14 detects a person thereafter, the air blow control unit 51 and the vertical swing mode control unit 52a are instructed to resume the operation.

  When the off timer is set by the off timer switch 46, the timer control unit 55 counts the time from the setting time, and when the count time reaches the off timer time, the timer control unit 55 operates the blower control unit 51 and the vertical swing control unit 52. Send stop instructions. Further, when the on timer is set by the on timer switch 47, the timer control unit 55 counts the time from the setting time, and when the count time reaches the on timer time, the air blow control unit 51 and the vertical swing control unit 52 Send an instruction to start driving.

  The storage unit 56 stores the air volume at the time when the operation stop instruction is given by the power-off operation or the turn-off timer operation, the elevation angle of the head 2, and the presence / absence of the vertical swing mode. Further, the storage unit 56 sets the air volume and the vertical swing mode when the turbo switch 43 is turned on, and sets the air volume and the vertical swing mode when the operation stop instruction is given by the sensor mode control unit 54. The presence or absence of is memorized.

  Next, main operations of the electric fan 1 will be described with reference to the flowcharts shown in FIGS. Here, the operation at the time of operation stop will be described first, and then the operation at the start of operation and the operation in each mode will be described.

  As shown in FIG. 8, when an operation stop instruction is issued during operation by a power-off operation or an off timer operation (step S1), the elevation angle of the head 2 at the time when the operation stop instruction is issued by the determination unit 52c. Is determined (step S2), and the elevation angle, the air volume at the time when the operation stop instruction is given, and whether or not the vertical swing mode is set are stored in the storage unit 56 (step S3). If the vertical swing mode is set (step S4: Yes), the vertical swing of the head 2 is stopped at the elevation angle at the time when the operation stop instruction is given (step 5). Further, the fan motor stops (step S6). Note that step S5 and step S6 may be performed simultaneously.

  Next, it is determined whether or not the return function is valid, and if it is valid (not invalidated) (step S7: Yes), the head 2 is tilted at an elevation angle of 0 degrees by the return control unit 52b. And then stops (step S8). During this returning operation, the lamp of the display unit 49 blinks (step S8). Note that the stop of the vertical swing in step S5 and the return operation in step S8 may be performed at intervals, but may be performed continuously.

Next, the operation at the start of operation and the operation in the vertical swing mode will be described.
As shown in FIG. 9, when an operation start instruction is given by a power-on operation or an on-timer operation (step S11), the fan motor 23 is rotated at a rotational speed corresponding to the air volume at the previous operation stored in the storage unit 56. The rotation is started (step S12).

  Further, whether or not the vertical swing mode has been set during the previous operation is read from the storage unit 56, and if the vertical swing mode has not been set during the previous drive (step S13: No) Then, the head 2 moves to the position of the elevation angle when the previous operation stop instruction stored in the storage unit 56 is given by the return control unit 52b (step S14). Note that step S12 and step S14 may be started simultaneously.

  If the vertical swing mode has been set during the previous driving (step S13: Yes), the vertical swing mode is automatically set, and the head 2 is moved vertically by the vertical swing mode control unit 52a. Swing is started (step S15). Note that step S12 and step S15 may be started simultaneously. Thereafter, when the vertical swing switch 44 is turned off (step S16: Yes), the head 2 stops at the elevation angle at the time of the off operation (step S17).

  After step S14 or step S17, when the vertical swing switch 44 is turned on (step S18: Yes), the head 2 starts vertical swing (step S15).

Next, the operation in the turbo mode will be described.
As shown in FIG. 10, when the turbo switch 43 is turned on during operation (step S21), the air volume at the time of the on operation and whether or not the vertical swing mode is set are stored in the storage unit 56 (step S22). . If the vertical swing mode has been set (step S23: Yes), the vertical swing mode is temporarily canceled and the vertical neck of the head 2 at the elevation angle when the turbo switch 43 is turned on. The swing is stopped (step S24). Further, the air volume of the fan 21 is changed to the turbo air volume (step S25). Note that step S24 and step S25 may be performed simultaneously.

  Thereafter, if the predetermined time has elapsed since the turbo switch 43 was turned on (step S26: Yes), or the turbo switch 43 was turned off (step S27: Yes), the turbo mode is canceled and the fan The air volume of 21 is returned to the air volume before setting the turbo mode stored in the storage unit 56 (step S28). If the vertical swing mode has been set before the turbo mode is set (step S29: Yes), the vertical swing mode is automatically set by releasing the turbo mode, and the head 2 is swung vertically. Resume (step S30). Note that step S28 and step S30 may be started simultaneously.

Next, the operation in the sensor mode will be described.
As shown in FIG. 11, after the sensor switch 48 is turned on during driving (step S41), if the time during which the human detection sensor 14 does not detect a person continues for a predetermined time (step S42: Yes), the sensor mode control unit 54 is instructed to stop the operation, and the air volume at that time and whether or not the vertical swing mode is set are stored in the storage unit 56 (step S43). When the vertical swing mode is set (step S44: Yes), the vertical swing mode of the head 2 is swung at the elevation angle when the vertical swing mode is temporarily canceled and the operation stop instruction is given. Stop (step S45). Further, the fan motor 23 stops (step S46). Note that step S45 and step S46 may be performed simultaneously.

  After the operation is stopped, whether the human detection sensor 14 detects a person (step S47: Yes) or when the sensor mode switch is turned off (step S48: Yes), the sensor mode control unit 54 instructs to resume the operation. Is performed, and the fan motor 23 resumes rotation at the rotational speed corresponding to the air volume before the suspension of operation stored in the storage unit 56 (step S49). If the vertical swing mode has been set before the suspension of operation (step S50: Yes), the vertical swing mode is automatically set and the vertical swing of the head 2 is resumed (step S51). . Note that step S49 and step S51 may be started simultaneously.

  In the above description, the description about the left and right swing is omitted, but here, the left and right swing is also briefly described. The vertical swing mode and the horizontal swing mode can be set at the same time. When the vertical swing switch 44 is turned on and the left and right swing switch 45 is turned on, the vertical and horizontal swing operations of the head 2 are started. When the operation is stopped, the left / right swing operation stops the left / right swing of the head 2 at the left / right angle when the operation stop instruction is given, and the up / down swing operation moves the head 2 with the elevation angle of 0 degrees as described above. Stop after moving to position.

  In the electric fan 1 of the present embodiment described above, when the operation is stopped, the return control unit 52b controls the swing motor 31 so as to move the head 2 to the position where the elevation angle is 0 degrees. Can be prevented, and it can be prevented that the handle 26 cannot be gripped when the operation is stopped.

In this embodiment, in response to the operation stop instruction, the head moves toward the position where the elevation angle is 0 degrees, but the fan motor stops until the head reaches the position where the elevation angle is 0 degrees. Therefore, the user can recognize that the operation stop instruction is performed.
Further, since the fan motor 23 starts rotating before the head 2 is moved to the previous elevation angle at the start of operation, the user can recognize that the operation start instruction has been issued.

  Further, in the present embodiment, the display unit 49 notifies that the head 2 is operating under the control of the return control unit 52b, so that the head 2 has an elevation angle of 0 after the user performs a power-off operation. It is possible to prevent the movement toward the position of the degree from being mistaken as a failure.

  In the present embodiment, the return control unit 52b moves the head 2 to a position where the elevation angle is 0 degrees based on the elevation angle of the head 2 at the time when the operation stop instruction determined by the determination unit 52c is made. Therefore, the head 2 can be stopped at the position where the elevation angle is 0 degrees in the shortest time.

  In addition, when the operation is stopped by the operation stop operation or the turn-off timer operation, the fan 1 may be moved during the operation stop. By moving it to the appropriate position, it is possible to reliably prevent the problem that the handle is difficult to grasp while the operation is stopped.

  Further, when the operation is suspended by the sensor mode, the handle 26 is not used because there is no person near the electric fan 1. Therefore, when the operation stop instruction is given by the sensor mode control unit 54, the head 2 is not moved unnecessarily by not performing the return operation of the head 2 by the return control unit 52b.

  In the present embodiment, whether or not to invalidate the return function (whether or not to perform control by the return control unit 52b) can be switched by operating the switches 42 and 44 of the operation panel 9. Whether or not to move the head 2 to the position where the elevation angle is 0 degrees can be selected according to the usage status of the electric fan 1 when the operation is stopped.

  Further, in the present embodiment, at the start of driving, the return control unit 52b controls the swing motor 31 to move the head 2 to the elevation angle at the time when the previous driving stop instruction is given, so that driving is started. The user does not have to adjust the angle of the head 2 each time.

  In addition, when the operation is resumed by the operation start operation or the on-timer operation, the fan 1 may be operated at the elevation angle at the time when the operation stop instruction is given. Therefore, when the operation is resumed by the operation start operation or the on-timer operation, By moving the head 2 to the elevation angle when the operation stop instruction is given, the user does not have to adjust the angle of the head every time the operation is started.

  When starting operation in the vertical swing mode, even if the head is moved to the elevation angle at the time when the previous stop instruction was given, the vertical swing operation starts immediately thereafter. In this case, it is not necessary to perform useless control by not performing control for moving the head 2 to the elevation angle at the time when the previous stop instruction is given.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made as long as they are described in the claims.

  For example, in the above embodiment, a stepping motor is used as the swing motor 31, but the swing motor 31 is not limited to this and may be other motors such as a brassless motor.

  In the above-described embodiment, the example of controlling the swing angle by controlling the rotation speed (number of steps) of the motor has been described. However, the swing angle is controlled by appropriately controlling the rotation time and the like. You may control.

  Further, the vertical swing mechanism 24 for swinging the head 2 vertically is not limited to the configuration of the above embodiment as long as it has the swing motor 31. In the above embodiment, the example of the swing rotation mechanism of the motor gear 32 of the swing motor 31 and the fixed gear 33 has been described, but it is also applicable to the swing motor 31 swinging and rotating by the link mechanism. it can. If necessary, the swing motor 31 may be provided with a stopper (protrusion or the like) that regulates the swing rotation range of the link mechanism.

  In the above embodiment, the determination unit 52 c determines the elevation angle of the head 2 based on the number of steps of the swing motor 31, but other methods may be used for determining the elevation angle of the head 2. Good.

  In the above-described embodiment, the example including the determination unit 52c that determines the elevation angle of the head 2 has been described, but the determination unit 52c may not be provided. For example, the swing motor has the number of steps necessary to rotate it until it contacts the protrusion 28a by the maximum movable range of the head 2 on the elevation angle side (for example, 105 degrees including the elevation angle 90 degrees and the depression angle 15 degrees). After rotating 31, the head 2 is brought to a position where the elevation angle is 0 degree by reversing the swing motor 31 and rotating it by the number of steps necessary to rotate it to 0 degree (90 degrees). Can be moved.

  In the above embodiment, when the operation is started with the vertical swing mode off after the returning operation of the head 2, the head 2 is returned to the elevation angle during the previous operation. It does not have to be.

  In the above embodiment, whether or not to invalidate the return function (whether or not to perform control by the return control unit 52b) can be switched by operating the switches 42 and 44, but it may not be switched. That is, the return function may always be valid.

  In the above embodiment, the return control unit 52b automatically moves the head 2 to the position where the elevation angle is 0 degrees only when the operation is stopped by the power-off operation or the turn-off timer operation. Even if the return control unit 52b moves the head 2 to the position where the elevation angle is 0 degree only when the user operates the return switch. Good. The return switch may be provided on the operation panel 9 or may be provided at the handle 26 or the front center portion of the fan guard 22. The return switch also serves as an existing switch on the operation panel 9 and may be instructed to return by long pressing.

  The return switch may be operable only during operation or during operation stop, or may be operated during both operation and operation stop. The operation when the return switch is operated during operation will be described with reference to the flowchart of FIG.

  When the return switch is operated (step S61: Yes), if the vertical swing mode is set (step S62: Yes), the vertical swing mode is canceled and the return switch is operated. The vertical swing of the head 2 stops at the elevation angle (step S63), and the head 2 moves to a position where the elevation angle is 0 degrees (step S64).

  According to this modified example, even when the head 2 is stopped upward while driving or stopped, by operating the return switch, the head 2 can be moved to a position where the elevation angle is 0 degree. It is possible to prevent the handle 26 from being gripped.

DESCRIPTION OF SYMBOLS 1 Fan 2 Head 3 Base 21 Fan 22 Fan guard 23 Fan motor 24 Vertical swing mechanism 31 Swing motor 32 Motor gear (gear)
33 Fixed gear (gear)
34 axes (rotating axis)

Claims (3)

A fan, a fan guard covering the fan, a fan motor arranged behind the fan guard to rotate the fan, and a head having a vertical swing mechanism;
In a fan provided with a base that supports the head so as to be rotatable in the vertical direction about a rotation axis along the horizontal direction,
The vertical swing mechanism includes a swing motor that swings the head in the vertical direction with respect to the base, and a plurality of meshing gears driven by the swing motor,
When the head is at a position where the elevation angle is 0 degree, the rotating shaft is located above the rotating shaft of the fan motor along the front-rear direction.   The rotation range of the head in the vertical direction is set so that the end of the fan motor on which the fan is fixed is always positioned in front of a vertical plane passing through the center of the rotation shaft. The electric fan according to claim 1.   The electric fan according to claim 1 or 2, wherein a maximum elevation angle of a vertical rotation range of the head is 90 degrees.

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