JPWO2012026471A1 - One-touch fan attachment / detachment device - Google Patents

Abstract

An object of the present invention is to provide a fan one-touch attachment / detachment device that can attach a fan to a motor shaft with one touch, can hold the fan stably, and has good operability. An operating member 6 movably attached to the base 10 and an engaging portion that can be engaged with an engaged portion of the motor shaft 4 are formed, and can be reciprocated in the direction of the motor shaft 4 by the movement of the operating member 6. An engagement piece 41 and a return spring 8 for returning the moved operation member 6 to the original position are provided. Engagement mechanisms 31 and 32 are provided that reciprocate the engagement piece 41 in the direction of the motor shaft 4 by abutting and separating from each other as the operation member 6 moves.

Description

  The present invention relates to an attachment / detachment device used for attaching / detaching a fan such as a kitchen range hood to / from a motor shaft of a fan motor with one touch.

  In general, in order to attach a fan of a range hood to a fan motor, a screw portion of a motor shaft of the fan motor is passed through a top plate portion of the fan, and a left screw nut is screwed into a penetrating end of the screw portion and tightened. For this reason, in addition to the work of rotating the nut with the other hand while holding the fan with one hand, it is necessary to work while avoiding the cooking table installed under the range hood. There is a problem that it is difficult to install or replace. In view of the above, Patent Document 1 proposes a conventional fan attachment / detachment device that allows one-touch fan attachment.

  In this conventional fan attaching / detaching device, a motor shaft of a fan motor is provided with an anti-rotation engaging pin and an annular locking groove, while the motor shaft is engaged with a boss portion of the fan into which the motor shaft is inserted. An engaging recess that engages with the pin, a holding portion that locks in the locking groove of the motor shaft by the urging force of the spring and holds the fan in a state of retaining the fan, and moves the holding portion against the urging force of the spring And a release member for releasing the locking between the holding portion and the locking groove.

  In this conventional fan attachment / detachment device, the motor shaft of the fan motor is inserted into the boss portion of the fan, and the fan is attached to the motor shaft of the fan motor by locking the locking groove of the motor shaft to the holding portion of the fan. . On the other hand, the fan is removed from the motor shaft by operating the release member to move the holding portion and releasing the locking between the holding portion and the locking groove. As a result, the fan can be attached to and detached from the motor shaft with a single touch, and the workability of mounting and replacing the fan can be improved.

JP 2009-270550 A

  However, the conventional fan attachment / detachment device has a problem that it cannot be stably held because the retaining groove is held by the holding portion from one side. In addition, the spring for biasing the holding portion, the holding portion, and the release member are arranged in a straight line passing through the motor shaft, and a strong spring is used to prevent the holding state from being easily released. In such a case, a large force is required for the operation for releasing the holding state, and the operability is deteriorated.

  The present invention has been made in consideration of such conventional problems, and it is possible to attach the fan to the motor shaft with a single touch, and to stably hold the fan, and An object is to provide a one-touch attachment / detachment device for a fan with good operability.

The fan one-touch attaching / detaching device of the present invention is a fan one-touch attaching / detaching device that is detachably attached to the motor shaft and connects the fan to the motor shaft by inserting a motor shaft of a fan motor that rotates the fan. An operation member having a motor shaft insertion hole into which the motor shaft is inserted, a base fixed inside the cover fixed to the fan, and a guide portion and an operation portion movably attached to the base And an engagement portion that is engageable with an engaged portion on the outer peripheral surface of the motor shaft, and is provided on the base in a state where the guide portion is sandwiched so as to be able to reciprocate in the direction of the motor shaft. And a return spring for returning the operation member moved by the operation to the operation portion to the original, and a portion of the engagement piece sandwiching the guide portion and a guide corresponding thereto An engagement mechanism that reciprocates the engagement piece in the direction of the motor shaft by abutting and separating from each other with the movement of the guide portion is provided at a corresponding portion of the portion. The engaging piece moves forward and backward with respect to the motor shaft by separation and the engaging portion of the engaging piece engages and releases the engaged portion of the motor shaft.

  In such an invention, the engagement piece is retracted from the motor shaft insertion hole of the base via the engagement mechanism by moving the guide portion of the operation member. In this state, the motor shaft of the fan motor is inserted into the motor shaft insertion hole, and then the operation of the operation member is released, so that the return spring returns the operation member to its original state. Due to this return, the engaging piece advances in the direction of the motor shaft via the engaging mechanism, so that the engaging portion of the engaging piece and the engaged portion of the motor shaft are engaged and mounted on the motor shaft. be able to.

  By moving the operating member in the reverse direction with respect to the mounting state on the motor shaft described above, the engagement piece is retracted from the motor shaft via the engagement mechanism. The engagement with the engaged portion is released. Thereby, the removal from a motor shaft can be performed. As described above, the motor shaft can be attached and detached with a single touch, and the fan can be held on the motor shaft in a stable state with good operability.

  In the present invention, the engagement mechanism includes an inner diameter changing portion in which an inner diameter of the guide portion is changed along a moving direction of the guide portion, a support convex portion formed on an outer surface of the guide portion, and the engagement A first engagement convex portion provided on one side of the piece with the guide portion sandwiched therebetween and capable of contacting the inner diameter changing portion, and a support convex portion provided on the other side of the engagement piece with the guide portion sandwiched therebetween. It is preferable that it is formed with the 2nd engagement convex part which can contact | abut.

In addition, the engagement piece is advanced into the motor shaft insertion hole to engage with the engaged portion of the motor shaft, and the engagement piece is prevented from entering the motor shaft insertion hole and the motor shaft. It is preferable that the base is provided with a hold mechanism that releases the advance prevention by inserting a motor shaft into the insertion hole.
Providing the hold mechanism in this way prevents the engagement piece from entering the motor shaft insertion hole, so that the motor shaft can be smoothly inserted into the motor shaft insertion hole without operating the operation member. .

Further, it is preferable that the guide portion of the operation member is rotatable or linearly movable with respect to the base.
With such a structure, the operability to the operation member is improved.

The engagement piece includes an action piece that is in contact with the guide portion with the guide portion interposed therebetween, and a lock piece having the engagement portion that can be engaged with the engaged portion of the motor shaft. Thus, it is preferable that the action piece and the lock piece are in contact with each other via a taper surface, and the lock piece and the taper surface of the action piece are inclined in a direction to prevent the lock piece from coming off from the motor shaft.
In this case, even if a force is applied in the direction in which the fan comes off from the motor shaft, the fan can be prevented from coming off and a stable holding state can be maintained.

Further, it is preferable that the engagement piece is provided on at least one side on both sides of the motor shaft insertion hole.
Thus, the fan can be held in a stable state by engaging the engaging piece from at least one side on both sides of the motor shaft.

Moreover, it is preferable that the engaging portion of the engaging piece and the engaged portion of the motor shaft are threaded portions having screw threads that mesh with each other.
In this case, the present invention can be applied as it is to a conventional motor shaft using a left screw, and the motor shaft need not have a dedicated structure, and can be versatile.

Further, the lock piece is attached to the base via an elastic body that allows the lock piece to move along the axial direction of the motor shaft in order to engage the screw portion of the lock piece with the screw portion of the motor shaft. It is preferable to be provided.
As described above, the elastic body enables the lock piece to move along the axial direction of the motor shaft, so that the crest and trough of the screw portion of the lock piece can automatically coincide with the crest and trough of the screw portion of the motor shaft. Accordingly, the lock piece and the motor shaft can be reliably engaged.

  ADVANTAGE OF THE INVENTION According to this invention, while being able to attach a fan with respect to a motor shaft by one touch, the fan can be hold | maintained stably and the one-touch attachment / detachment apparatus of a fan with sufficient operativity can be provided. .

It is a perspective view which shows the state which attaches the fan one-touch attachment / detachment apparatus of one Embodiment of this invention to a fan. It is a bottom view of the one-touch attachment and detachment apparatus of the fan of one Embodiment of this invention. It is a side view of the one-touch attachment / detachment device for the fan according to Embodiment 1 of the present invention. It is A arrow directional view in FIG. It is sectional drawing which shows the lock release state of Embodiment 1 of this invention, and is CC sectional view taken on the line of FIG. It is the BB sectional drawing of FIG. 2 which shows the lock release state of Embodiment 1 of this invention. It is sectional drawing corresponding to FIG. 5 which shows the locked state of Embodiment 1 of this invention. It is sectional drawing corresponding to FIG. 6 which shows the locked state of Embodiment 1 of this invention. It is sectional drawing which shows the state before engagement with the motor shaft of the lock | rock piece of Embodiment 1 of this invention. It is sectional drawing which shows the engagement state to the motor shaft of the lock | rock piece of Embodiment 1 of this invention. It is sectional drawing (locked state) which cut | disconnected the one-touch attachment / detachment apparatus of the fan of Embodiment 2 of this invention with the plane containing a motor axis line. It is the DD sectional view taken on the line of FIG. It is sectional drawing (lock release state) which cut | disconnected the one-touch attachment / detachment apparatus of the fan of Embodiment 2 of this invention by the plane containing a motor axis. It is the EE sectional view taken on the line of FIG. FIG. 5 is a cross-sectional view of the fan one-touch attachment / detachment device according to Embodiment 3 of the present invention before attachment to the motor shaft, and is a cross-sectional view corresponding to line BB in FIG. 2. FIG. 10 is a cross-sectional view showing an initial insertion state of a motor shaft in a third embodiment. FIG. 10 is a cross-sectional view showing a motor shaft insertion end state in the third embodiment. FIG. 10 is a cross-sectional view showing a state of attachment to a motor shaft in the third embodiment. FIG. 6 is a cross-sectional view showing an incomplete attachment state to a motor shaft in a third embodiment. It is a top view which shows the one-touch attachment / detachment apparatus of the fan in Embodiment 4 of this invention. It is the FF sectional view taken on the line of FIG. FIG. 22 is a cross-sectional view taken along the line GG in FIG. 21 showing a state before attachment to the motor shaft in the fourth embodiment. FIG. 22 is a cross-sectional view taken along the line GG in FIG. 21 showing a state of attachment to the motor shaft in the fourth embodiment. It is a top view which shows the one-touch attachment / detachment apparatus of the fan in Embodiment 5 of this invention. It is the HH sectional view taken on the line in FIG. It is the II sectional view taken on the line of FIG. 25 which shows the state before the attachment to the motor shaft in Embodiment 5. FIG. It is the II sectional view taken on the line of FIG. 25 which shows the attachment state to the motor shaft in Embodiment 5. FIG. It is a top view which shows the one-touch attachment / detachment apparatus of the fan in Embodiment 6 of this invention. It is the JJ sectional view taken on the line in FIG. FIG. 30 is a sectional view taken along line KK in FIG. 29 showing a state before attachment to the motor shaft in the sixth embodiment. FIG. 30 is a cross-sectional view taken along the line KK in FIG. 29 showing a state of attachment to the motor shaft in the sixth embodiment. It is sectional drawing which shows the one-touch attachment / detachment apparatus of the fan in Embodiment 7 of this invention, and is sectional drawing corresponding to the BB line in FIG. It is an expanded sectional view of FIG. FIG. 16 is a cross-sectional view illustrating a fan one-touch attachment / detachment device according to an eighth embodiment of the present invention, corresponding to FIG. 15. It is a cross section which shows the one-touch attachment / detachment apparatus of the fan in Embodiment 9 of this invention, and is sectional drawing corresponding to FIG.

(Embodiment 1)
FIG. 1 shows a state in which a fan one-touch attachment / detachment device 1 according to an embodiment of the present invention is attached to a fan 2, and FIGS. 2 to 10 show the fan one-touch attachment / detachment device 1 according to Embodiment 1.

  The fan 2 is used, for example, in a range hood, and is attached to the fan motor 3 of the range hood so that the fan 2 rotates. As shown in FIG. 1, the motor shaft 4 of the fan motor 3 is suspended, and when the motor shaft 4 is inserted into the one-touch attachment / detachment device 1, the screw portion 4 a on the outer peripheral surface of the tip portion of the motor shaft 4 is The one-touch attachment / detachment device 1 is coupled. An anti-rotation pin 4b protrudes from the motor shaft 4 so as to be orthogonal to the axial direction, and the anti-rotation pin 4b fits into an engagement recess (not shown) provided on the top plate 2a side of the fan 2. As a result, the fan 2 and the rotation prevention pin 4 b are engaged with each other and are rotated by the fan motor 3.

  The fan 2 is a sirocco fan in which a plurality of blades 2c are attached along a circumferential direction between a circular top plate portion 2a and a circular ring body 2b below the top plate portion 2a. The one-touch attachment / detachment device 1 of this embodiment acts to attach / detach the fan 2 to / from the motor shaft 4 of the fan motor 3 by being attached to the lower surface of the top plate portion 2 a of the fan 2.

  2 is a bottom view of the one-touch attachment / detachment device 1, FIG. 3 is a side view, FIG. 4 is a view taken along arrow A in FIG. 3, FIG. 5 is a cross-sectional view taken along line CC in FIG. It is line sectional drawing. 5 and 6 are cross-sectional views showing the unlocked state, FIGS. 7 and 8 are cross-sectional views showing the locked state, and FIGS. 9 and 10 are cross-sectional views illustrating the engagement with the motor shaft 4.

  As shown in FIGS. 1 to 6, the one-touch attachment / detachment device 1 includes a cover 5, a base 10, an operation member 6, a return spring 8, an elastic body 14, lock pieces 12 and 13, and action pieces 15 and 16. And an engagement piece 41 made of the same.

  The cover 5 is formed in a thin plate-like dish shape including the housing portion 5a and the flange portion 5b around the housing portion 5a, and the flange portion is in a state where the flange portion 5b is in contact with the top plate portion 2a of the fan 2. It is fixed to the fan 2 by screwing screws into a plurality of mounting holes 5c formed in 5b. The accommodating portion 5 a accommodates the base 10, the operation member 6, the return spring 8, the elastic body 14, and the engagement piece 41 including the lock pieces 12 and 13 and the action pieces 15 and 16.

  The base 10 is fixed to the bottom surface of the housing portion 5a of the cover 5 with rivets or the like. In the base 10, a motor shaft insertion hole 10 a into which the motor shaft 4 is inserted passes through a substantially central portion. As shown in FIG. 5, the motor shaft insertion hole 10 a is formed in the circular shaft portion 10 b of the base 10. The operation member 6 is attached to the circular shaft portion 10b of the base 10 so as to be displaceable (rotatable).

  The operation member 6 includes a guide portion 22 and an operation portion 23 that protrudes outward from the guide portion 22. As shown in FIG. 5, the guide portion 22 has a ring shape surrounding the circular shaft portion 10b of the base 10, and is attached to the base 10 so as to be movable around the circular shaft portion 10b. In this embodiment, the guide portion 22 is attached to the base 10 so as to be rotatable in the forward and reverse directions around the circular shaft portion 10b, and the guide portion is moved by the rotation in the forward and reverse directions. Yes. The forward rotation of the guide portion 22 (operation member 6) is a direction in which the operation member 6 rotates in the unlocking direction, and in this embodiment, the rotation is counterclockwise. The rotation in the reverse direction is a direction in which the guide portion 22 (operation member 6) rotates in the lock direction. In this embodiment, the rotation is clockwise.

  The operation portion 23 of the operation member 6 is a portion that is operated to rotate in the forward direction, protrudes radially outward from the guide portion 22, and is exposed to the outside from the housing portion 5 a of the cover 5. ing. In this case, since the handle portion 25 covers the operation portion 23, the protrusion length from the cover 5 is increased, thereby making it easy to operate the operation portion 23. A knob 7 is formed on the cover 5 with respect to the operation part 23, and a rotation operation to the operation part 23 is performed by placing a finger on the knob 7 and the operation part 23 (handle part 25). Is easy.

  A pair of lock pieces 12 and 13 and a pair of action pieces 15 and 16 as the engaging pieces 41 are accommodated in the circular shaft portion 10 b of the base 10. One action piece 15 is provided on the circular shaft portion 10 b so as to correspond to the lock piece 12, and the other action piece 16 is provided on the circular shaft portion 10 b so as to correspond to the lock piece 13. With respect to these action pieces 15, 16, thick connecting portions 12 b, 13 b are formed at the rear ends of the respective lock pieces 12, 13, and these connecting portions 12 b, 13 b are connected to the action pieces 15, 16. By inserting in the engaged state, the lock pieces 12 and 13 and the corresponding action pieces 15 and 16 are connected.

The pair of action pieces 15 and 16 are accommodated along the diameter direction of the circular shaft portion 10b with the motor shaft insertion hole 10a interposed therebetween. Screw portions 12a and 13a that engage with and engage with the screw portion 4a of the motor shaft 4 are formed on the front end surfaces of the lock pieces 12 and 13 on the motor shaft insertion hole 10a side. The action pieces 15 and 16 are attached to the circular shaft portion 10b of the base 10 so as to be linearly reciprocable only in the direction of the motor shaft 4. Therefore, when the lock pieces 12 and 13 advance toward the motor shaft 4, the screw portions 12 a and 13 a engage with the screw portion 4 a of the motor shaft 4, and the lock pieces 12 and 13 retract from the motor shaft 4. The engagement with the screw portion 4a of the motor shaft 4 is released.

  In this embodiment, the lock pieces 12 and 13 and the action pieces 15 and 16 are provided on both sides of the motor shaft insertion hole 10 a of the base 10. Thus, by arranging the lock pieces 12 and 13 and the action pieces 15 and 16 on both sides of the motor shaft insertion hole 10a, the screw portion 4a of the motor shaft 4 inserted into the motor shaft insertion hole 10a is locked from both sides. Therefore, a stable locked state can be obtained.

  As shown in FIG. 6, each action piece 15, 16 is formed in a U-shape with an opening at the bottom, and a ring-shaped guide portion 22 of the operation member 6 is inserted therein. Thereby, each action piece 15 and 16 is in a state of sandwiching the guide portion 22 of the operation member 6. By sandwiching the guide portion 22 in this way, engagement mechanisms 31 and 32 are formed between the action pieces 15 and 16 and the portion where the guide portion 22 is sandwiched.

  The engaging mechanisms 31 and 32 include first engaging convex portions 33 and 34 formed on one side (inner side) of the action pieces 15 and 16 with the guide portion 22 interposed therebetween, and the other side with the guide portion 22 interposed therebetween. It has the 2nd engaging convex parts 35 and 36 formed in (outside). The engagement mechanisms 31 and 32 include inner diameter changing portions 37 and 38 formed on the inner surface of the guide portion 22 so as to correspond to the first engagement convex portions 33 and 34, and second engagement convex portions 35 and 36. And support convex portions 39 and 40 formed on the outer surface of the guide portion 22. Each support convex part 39,40 protrudes from the outer surface of the guide part 22 to radial direction, The protrusion end surface is formed in planar shape. Each of the inner diameter changing portions 37 and 38 is formed by large-diameter concave portions 37a and 38a and curved surface portions 37b and 38b that are continuously reduced in diameter from both sides of the large-diameter concave portions 37a and 38a.

  In the engagement mechanisms 31 and 32, the support projections 39 and 40 abut on the second engagement projections 35 and 36 of the action pieces 15 and 16, so that the action pieces 15 and 16 are separated from the motor shaft 4. The lock pieces 12 and 13 are moved away from the motor shaft 4 by the movement of the action pieces 15 and 16. As a result, as shown in FIGS. 5 and 6, the screw portions 12 a and 13 a of the lock pieces 12 and 13 are disengaged from the engagement with the screw portion 4 a of the motor shaft 4 to be unlocked. On the other hand, when the operation member 6 rotates in the reverse direction (clockwise), the contact between the support convex portions 39 and 40 and the second engagement convex portions 35 and 36 is released. At the same time, in the inner diameter changing portions 37 and 38 of the guide portion 22, the curved surface portions 37 b and 38 b continuing to the large diameter concave portions 37 a and 38 a are in contact with the first engaging convex portions 33 and 34. Since the curved surface portions 37b and 38b are smaller in diameter than the large-diameter recessed portions 37a and 38a, the action pieces 15 and 16 are pushed by the curved surface portions 37b and 38b coming into contact with the first engaging convex portions 33 and 34. Then, it moves linearly in the direction of the motor shaft 4, and along with this movement, the lock pieces 12, 13 move linearly in the direction of the motor shaft 4. Accordingly, as shown in FIGS. 7 and 8, the screw portions 12 a and 13 a of the lock pieces 12 and 13 are engaged with and engaged with the screw portion 4 a of the motor shaft 4. Further, since the diameters of the curved surface portions 37 b and 38 b are gradually reduced, even if the screw portion 4 a of the motor shaft 4 has a large or small diameter, the lock pieces 12 and 13 have the screw portions 12 a and 13 a of the motor shaft 4. It can move smoothly until it comes into close contact with the threaded portion 4a. By such engagement, the one-touch attachment / detachment device 1 is attached to the motor shaft 4.

  In the above configuration, the lock pieces 12 and 13 and the action pieces 15 and 16 are in contact with each other via a tapered surface. That is, as shown in FIGS. 6 and 8, taper surfaces 12c and 13c are formed on the outer surfaces of the lock pieces 12 and 13, and taper surfaces 15c and 16c corresponding to the taper surfaces 12c and 13c are acting pieces 15, 16 is formed. These tapered surfaces 12c, 13c, 15c, and 16c are inclined surfaces that gradually increase in distance from the motor shaft 4 along the insertion direction (downward direction) of the motor shaft 4. By adopting such an inclined surface, the lock pieces 12 and 13 are prevented from being detached from the motor shaft 4 even if a downward force (force in a direction away from the motor shaft 4) is applied to the one-touch attachment / detachment device 1. The Thereby, the one-touch attachment / detachment device 1 does not move in the removal direction, and the one-touch attachment / detachment device 1 can be stably attached to the motor shaft 4 and can be prevented from rattling in the attachment state.

That is, when a downward force is applied to the one-touch attachment / detachment device 1 (force in a direction away from the motor shaft 4), the lock pieces 12 and 13 engage with the screw portions 12a and 13a of the motor shaft 4 engaged with the screw portions 4a. Therefore, an upward force (upward force in FIG. 6 and FIG. 8) is received from the screw portion 4a of the motor shaft 4, and it tries to move upward by that force. Since the interval between the tapered surfaces in contact with the pieces 15 and 16 becomes narrower in the upward direction, the lock piece receives a force toward the center of the motor shaft 4. Therefore, the lock pieces 12 and 13 are prevented from coming off the motor shaft 4.

In the mounted state, the lock pieces 12 and 13 are pushed by the action pieces 15 and 16 and receive a force in the direction of the motor shaft 4, but the tapered surface is inserted in the motor shaft 4 as described above (downward). Accordingly, the force in the direction of the motor shaft 4 received by the lock pieces 12 and 13 is a downward force (the paper surface in FIGS. 6 and 8). Down). Therefore, the screw portions 12a and 13a of the lock pieces 12 and 13 are engaged and engaged so as to press the screw portion 4a of the motor shaft 4 downward. That is, the lock pieces 12 and 13 receive an upward reaction force from the motor shaft 4, that is, the fan 2 receives a force restrained upward. At this time, the fan 2 and the motor shaft 4 are engaged with each other by engaging a rotation-preventing pin protruding from the motor shaft 4 in an engagement recess provided on the top plate portion 2a side of the fan 2. Is restricted from moving in the upward direction (upward in FIG. 6 and FIG. 8). Therefore, the upward reaction force received by the fan 2 from the motor shaft 4 effectively acts to suppress the fan 2 upward, and the rattling of the fan in the mounted state can be effectively suppressed.

  As shown in FIGS. 6 and 8, the elastic body 14 is disposed between the lock pieces 12 and 13 and the base 10 so as to sandwich the lock pieces 12 and 13 therebetween. That is, the elastic body 14 is disposed between the base 10 and the lock pieces 12 and 13 so as to sandwich the lock pieces 12 and 13. As the elastic body 14, a coil spring is used. However, the elastic body 14 may be formed by stacking disc springs or sandwiching leaf springs. In this way, the elastic body 14 is disposed in a state where the lock pieces 12 and 13 are sandwiched between the upper and lower sides, so that the lock pieces 12 and 13 are held in a movable manner along the vertical direction (the axial direction of the motor shaft 4). It becomes. Thereby, the lock pieces 12 and 13 can move so that the peaks and valleys of the screw portions 12 a and 13 a engage with the peaks and valleys of the screw portion 4 a of the motor shaft 4, and the engagement with the screw portion 4 a of the motor shaft 4 is surely and easily performed. Can be done.

FIG. 9 shows a state in which the peaks and valleys of the screw portions 12 a and 13 a of the lock pieces 12 and 13 do not coincide with the peaks and valleys of the screw portion 4 a of the motor shaft 4, and the elastic body 14 has the lock pieces 12 and 13 against this state. Since the rock pieces 12 and 13 are held in the up and down direction, the lock pieces 12 and 13 are moved so that the mountains and valleys coincide with each other. Accordingly, as shown in FIG. 10, the peaks and valleys of the screw portions 12 a and 13 a of the lock pieces 12 and 13 coincide with the peaks and valleys of the screw portion 4 a of the motor shaft 4, and the screw portions 12 a and 13 a are the screw portions 4 a of the motor shaft 4. The lock pieces 12 and 13 are coupled to the motor shaft 4 by the engagement, and the fan one-touch attachment / detachment device 1 is mounted on the motor shaft 4.

  In the state where the return spring 8 is wound around the base 10, the hook portion 8 a at one end is locked to the base 10, and the hook portion 8 b at the other end is locked to the operation member 6. As a result, the return spring 8 biases the operating member 6 so as to rotate in the locking direction (clockwise). Accordingly, when the rotation operation in the unlocking direction with respect to the operation member 6 is released, the operation member 6 is automatically rotated in the lock direction by the urging force of the return spring 8.

  Next, the operation of the first embodiment will be described with reference to FIGS.

  5 and 6 show a state in which the operation portion 23 (the handle portion 25) of the operation member 6 is rotated in the forward direction (counterclockwise direction). By the rotation of the operation portion 23 in the positive direction, the support convex portions 39 and 40 in the guide portion 22 of the operation member 6 abut on the second engagement convex portions 35 and 36 of the action pieces 15 and 16, 16 is moved linearly in a direction away from the motor shaft 4. In this state, the first engaging convex portions 33 and 34 of the action pieces 15 and 16 face the large diameter concave portions 37 a and 38 a of the guide portion 22 with a gap, and these first engaging convex portions 33. , 34 are not in contact with the guide portion 22. Since the lock pieces 12 and 13 are moved in the same direction by the movement of the action pieces 15 and 16, the screw portions 12a and 13a of the lock pieces 12 and 13 are retracted from the motor shaft insertion hole 10a of the base 10.

  Therefore, in this state, the motor shaft 4 can be inserted into the motor shaft insertion hole 10a. After the motor shaft 4 is inserted, the operation of the operation member 6 to the operation unit 23 is released. When the operation on the operation unit 23 is released, the operation member 6 is rotated in the reverse direction (clockwise) by the biasing force of the return spring 8. By this rotation, the support convex portions 39 and 40 in the guide portion 22 of the operation member 6 are released from contact with the second engagement convex portions 35 and 36 of the action pieces 15 and 16.

  When the operating member 6 (guide portion 22) is further rotated in the reverse direction (clockwise) by the urging force of the return spring 8, the curved surface portions 37b and 38b of the inner diameter changing portion 37 of the guide portion 22 become the first of the action pieces 15 and 16. 1 abuts on the engaging projections 33, 34. Since the curved surface portions 37b and 38b are smaller in diameter than the large-diameter concave portions 37a and 38a, the operational pieces 15 and 16 are pushed by abutting against the first engaging convex portions 33 and 34 to thereby act on the operational pieces 15 and 16. Is linearly moved in the direction of the motor shaft 4. With this movement, the lock pieces 12 and 13 move linearly in the direction of the motor shaft 4, so that the screw portions 12 a and 13 a of the lock pieces 12 and 13 are connected to the motor shaft 4 as shown in FIGS. 7 and 8. The screw part 4a is engaged and engaged. When engaging the screw portions 12a and 13a, the elastic body 14 holds the lock pieces 12 and 13 from above and below. Therefore, as described with reference to FIGS. Coincides with the peaks and valleys of the threaded portion 4a of the motor shaft 4 and can be engaged with each other. The one-touch attachment / detachment device 1 is attached to the fan 2 by engaging the screw portions 12 a, 13 a of the lock pieces 12, 13 with the screw portion 4 a of the motor shaft 4.

  The operating portion 23 (handle portion 25) of the operating member 6 is rotated counterclockwise with respect to the mounting state on the fan 2. As a result, the state shown in FIGS. 5 and 6 is obtained, and the lock pieces 12 and 13 are linearly moved away from the motor shaft 4 so that the screw portions 12 a and 13 a are engaged with the screw portion 4 a of the motor shaft 4. Leave. Thereby, the one-touch attachment / detachment device 1 can be detached from the fan 2.

  According to the first embodiment, since the operation pieces 6 are rotated in the forward direction, the action pieces 15 and 16 retract the lock pieces 12 and 13 from the motor shaft insertion groove 10 a of the base 10. The shaft 4 can be inserted into the motor shaft insertion groove 10a. Thereafter, since the return spring 8 returns to the original operation member 6 by releasing the operation of the operation member 6, the action pieces 15 and 16 advance the lock pieces 12 and 13 in the direction of the motor shaft 4, and the lock piece 12. , 13 and the screw portion 4a of the motor shaft 4 are engaged with each other, so that the motor shaft 4a can be mounted. Further, by rotating the operation member 6 in the forward direction, the action pieces 15, 16 retract the lock pieces 12, 13 from the motor shaft 4, so that the screw portions 12 a, 13 a of the lock pieces 12, 13 and the motor shaft 4 are moved. Can be detached from the motor shaft 4. Thereby, attachment to and detachment from the motor shaft 4 can be performed with one touch. Moreover, since it is not necessary to perform processing for attachment / detachment with respect to the motor shaft 4, the present invention can also be applied to a conventional motor shaft using a left-hand screw. Thereby, it is not necessary to make a motor shaft into a dedicated structure, and it can have versatility. Further, in the holding state, the engagement piece 41 composed of the action pieces 15 and 16 and the lock pieces 12 and 13 is fixed by the inner diameter changing parts 37 and 38 of the guide part 22, so that the conventional method of suppressing by the elastic force of a spring or the like. Compared to the fan, the fan can be held stably and firmly. That is, in the conventional method, the holding portion is urged and restrained by the elastic force of the spring or the like in the locking groove provided on the motor shaft, and the holding state is maintained by the elastic force of the spring or the like. However, in the present invention, since the movement of the engagement piece 41 is regulated by the inner diameter changing portions 37 and 38 of the guide portion 22, the holding state can be maintained more firmly.

  In the first embodiment, the elastic bodies 14 are arranged above and below the respective lock pieces 12 and 13, but a structure in which one elastic body 14 is passed through the respective lock pieces 12 and 13 may be used. good. In this case, the lock pieces 12 and 13 are formed with convex portions that engage with the elastic body 14, or the penetration portions of the lock pieces 12 and 13 in the elastic body 14 are engaged with the lock pieces 12 and 13 with an adhesive. Alternatively, the elastic body 14 may be engaged with the lock pieces 12 and 13 with the through-holes of the lock pieces 12 and 13 having a large diameter. Further, the lock pieces 12 and 13 and the action pieces 15 and 16 may be provided singly on one side of the motor shaft insertion hole 10a without being provided on both sides of the motor shaft insertion hole 10a, or may be provided at three or more locations. .

(Embodiment 2)
As shown in FIGS. 11 to 14, the one-touch attachment / detachment device for a fan according to the second embodiment of the present invention is configured such that the engagement piece 41 is locked to the action piece and the operation piece as in the first embodiment as compared with the configuration of the first embodiment. Instead of the two parts of the piece, it is configured as a single piece, and the engaged portion of the motor shaft 4 and the engaging portion of the engaging piece are threaded portions in the first embodiment. A configuration in which a constricted portion 44 with a reduced diameter is provided in a part of the motor shaft 4 to form an engaged portion 42, and the engaging portion 43 of the engaging piece 41 is inserted into the constricted portion 44 to hold the fan. It is said. Since the other components are basically the same as those of the one-touch attachment / detachment device of the first embodiment, the same reference numerals are assigned and redundant description is omitted.

  FIG. 11 is a cross-sectional view (locked state) of the fan one-touch attachment / detachment device according to the second embodiment of the present invention cut along a plane including the motor axis, and FIG. 12 is a cross-sectional view taken along the line DD of FIG. 13 is a cross-sectional view (unlocked state) of the fan one-touch attaching / detaching device according to the second embodiment of the present invention cut along a plane including the motor axis, and FIG. 14 is a cross-sectional view taken along the line EE of FIG.

  As shown in FIGS. 11 and 13, the engaged portion 42 of the motor shaft 4 is formed by a constricted portion 44 having a reduced diameter in a part of the motor shaft, and the engagement piece 41 is engaged with the constricted portion 44. It has a structure in which the joint portion 43 is engaged by entering.

  A pair of engagement pieces 41 are accommodated in the circular shaft portion 10 b of the base 10. The pair of engagement pieces 41 are accommodated along the diameter direction of the circular shaft portion 10b with the motor shaft insertion hole 10a interposed therebetween. An engaging portion 43 is formed at the tip of each engaging piece 41 on the side of the motor shaft insertion hole 10a so as to enter and engage the constricted portion 44 that is the engaged portion 42 of the motor shaft 4. The engagement piece 41 is attached to the circular shaft portion 10b of the base 10 so as to be linearly reciprocable only in the direction of the motor shaft 4. Accordingly, when the engagement piece 41 advances to the motor shaft 4 side, the engagement portion 43 engages with the constricted portion 44 of the motor shaft 4, and the engagement piece 41 retreats from the motor shaft 4, so that the motor shaft The engagement with the four constricted portions 44 is released.

  As shown in FIG. 14, the engagement portion 43 formed at the distal end portion of the engagement piece 41 on the motor shaft insertion hole 10 a side has a distal end surface that contacts the constricted portion 44 of the motor shaft 4 in the shape of the constricted portion 44. Together, it has a curved surface. Thereby, since many contact surfaces can be taken, it can be set as the stable engagement state.

  In this embodiment, the engagement pieces 41 are provided on both sides of the base 10 with the motor shaft insertion hole 10a interposed therebetween. By disposing the engaging pieces 41 on both sides of the motor shaft insertion hole 10a in this way, the engaged portion 42 of the motor shaft 4 inserted into the motor shaft insertion hole 10a can be locked from both sides. , A stable locked state can be obtained.

  As shown in FIGS. 11 and 13, each engagement piece 41 is formed in a U shape whose rear side (the side far from the motor shaft) is opened downward, and has an inner ring shape. The guide part 22 of the member 6 is inserted. Thereby, each engagement piece 41 is in a state of sandwiching the guide portion 22 of the operation member 6. By sandwiching the guide portion 22 in this way, engagement mechanisms 31 and 32 are formed between the engagement piece 41 and the portion where the guide portion 22 is sandwiched.

  The engagement mechanisms 31 and 32 include first engagement convex portions 33 and 34 formed on one side (inner side) of the respective engagement pieces 41 with the guide portion 22 interposed therebetween, and the other side of the guide portion 22 sandwiched between ( 2nd engagement convex parts 35 and 36 formed in the outer side. The engagement mechanisms 31 and 32 include inner diameter changing portions 37 and 38 formed on the inner surface of the guide portion 22 so as to correspond to the first engagement convex portions 33 and 34, and second engagement convex portions 35 and 36. And support convex portions 39 and 40 formed on the outer surface of the guide portion 22. Each support convex part 39,40 protrudes from the outer surface of the guide part 22 to radial direction, The protrusion end surface is formed in planar shape. Each of the inner diameter changing portions 37 and 38 is formed by large-diameter concave portions 37a and 38a and curved surface portions 37b and 38b that are continuously reduced in diameter from both sides of the large-diameter concave portions 37a and 38a.

  In the engagement mechanisms 31 and 32, the support protrusions 39 and 40 come into contact with the second engagement protrusions 35 and 36 of the engagement piece 41, so that the engagement piece 41 is linearly separated from the motor shaft 4. Move on. As a result, as shown in FIGS. 13 and 14, the engaging portion 43 of the engaging piece 41 is disengaged from the engagement with the constricted portion 44 that is the engaged portion 42 of the motor shaft 4, and the lock is released. On the other hand, when the operation member 6 rotates in the reverse direction (clockwise), the contact between the support protrusions 39 and 40 and the second engagement protrusions 35 and 36 is released. At the same time, in the inner diameter changing portions 37 and 38 of the guide portion 22, the curved surface portions 37 b and 38 b continuing to the large diameter concave portions 37 a and 38 a are in contact with the first engaging convex portions 33 and 34. Since the curved surface portions 37b and 38b are smaller in diameter than the large-diameter concave portions 37a and 38a, the curved surface portions 37b and 38b come into contact with the first engaging convex portions 33 and 34, whereby the engagement piece 41 is pushed. And move linearly in the direction of the motor shaft 4. Accordingly, as shown in FIGS. 11 and 12, the engaging portion 43 of the engaging piece 41 enters and engages the constricted portion 44 that is the engaged portion 42 of the motor shaft 4. With such engagement, the one-touch attachment / detachment device is attached to the motor shaft 4. Therefore, in the holding state, the engagement piece 41 is fixed by the inner diameter changing portions 37 and 38 of the guide portion 22, so that the fan can be held stably and firmly as compared with the conventional method of suppressing by the elastic force of a spring or the like. Can do. That is, in the conventional method, the holding portion is urged and restrained by the elastic force of the spring or the like in the locking groove provided on the motor shaft, and the holding state is maintained by the elastic force of the spring or the like. However, in the present invention, since the movement of the engagement piece 41 is restricted by the inner diameter changing portions 37 and 38 of the guide portion 22, the holding state can be maintained more firmly.

(Embodiment 3)
15 to 19 show a fan one-touch attachment / detachment device according to Embodiment 3 of the present invention, and are cross-sectional views corresponding to line BB in FIG. The one-touch attachment / detachment apparatus according to this embodiment has a structure similar to that of the one-touch attachment / detachment apparatus 1 according to the first embodiment, and has a structure in which a hold mechanism 51 is provided on the base 10.

  That is, the one-touch attachment / detachment device according to this embodiment is similar to the first embodiment in that the cover 5 is fixed to the fan 2, the base 10 is fixed to the bottom surface of the housing portion 5a of the cover 5, and the base 10 is displaced. It has the operation member 6 attached so that it was possible. The base 10 has a motor shaft insertion hole 10a into which the motor shaft 4 is inserted, penetrating through a substantially central portion, and the operation member 6 is attached to a circular shaft portion 10b in which the motor shaft insertion hole 10a is formed.

  The operation member 6 includes a ring-shaped guide portion 22 attached to the circular shaft portion 10b of the base 10 so as to be rotatable in forward and reverse directions, and an operation projecting outward from the guide portion 22 as shown in FIG. Part 23.

  As shown in FIG. 5, the circular shaft portion 10 b of the base 10 has a pair of lock pieces 12 and 13 as an engagement piece 41 and a pair of action pieces 15 connected to the pair of lock pieces 12 and 13, respectively. 16 are provided on both sides of the motor shaft insertion hole 10a. Screw portions 12a and 13a that engage with the screw portions 4a of the motor shaft 4 are formed on the front end surfaces of the lock pieces 12 and 13. First engaging convex portions 33 and 34 are formed on the inner side of each action piece 15 and 16 with the guide portion 22 interposed therebetween, and second engaging convex portions 35 and 36 are formed on the outer side with the guide portion 22 interposed therebetween. Has been. The inner diameter changing portions 37 and 38 corresponding to the first engaging convex portions 33 and 34 are formed inside the guide portion 22, and the supporting convex portions 38 and 39 corresponding to the second engaging convex portions 35 and 36 are guides. It is formed outside the portion 22. Similarly to the first embodiment, the lock pieces 12, 13 are formed by the first engagement convex portions 33, 34, the second engagement convex portions 35, 36, the inner diameter changing portions 37, 38, and the support convex portions 39, 40. Are formed with engagement mechanisms 31 and 32 for engaging with or disengaging the screw portion 4a of the motor shaft 4. Further, the lock pieces 12 and 13 and the action pieces 15 and 16 are brought into contact with each other via tapered surfaces 12c, 15c, 13c and 16c in which the distance from the motor shaft 4 gradually increases along the insertion direction of the motor shaft 4. ing. Further, an elastic body 14 is provided between the lock pieces 12 and 13 and the base 10 so as to sandwich the lock pieces 12 and 13 from above and below. The base 10 is provided with a return spring 8 for returning the operation member 6 displaced by the rotation. The above structure is the same as that of the first embodiment.

  The hold mechanism 51 in this embodiment is formed by a hold cap 52 and a pressing spring 53 that presses the hold cap 52. The hold cap 52 is inserted into the motor shaft insertion hole 10a of the base 10 so as to be movable in the vertical direction, whereby the hold cap 52 is provided so as to coincide with the axial direction in which the motor shaft 4 is inserted. The hold cap 52 is formed in a cylindrical shape with the upper surface portion 52a closed and the lower surface portion opened. The hold cap 52 has a cylindrical shape having a diameter somewhat larger than the diameter of the screw portion 4 a of the motor shaft 4. As a result, when the hold cap 52 is positioned in the motor shaft insertion hole 10a, the lock pieces 12 and 13 are in a retracted state in which advancement into the motor shaft insertion hole 10a is prevented. A flange-like stopper portion 52b that contacts the base 10 is formed at the lower end portion of the hold cap 52. When the stopper portion 52b contacts the base 10, the upper portion of the hold cap 52 in the motor shaft insertion hole 10a is formed. The movement to stops.

The pressing spring 53 is disposed between the upper surface portion 52a of the hold cap 52 and the cover 5, and urges the hold cap 52 to move upward. Thereby, the hold cap 52 is urged so as to be inserted into the motor shaft insertion hole 10a of the base 10.

  In the one-touch attachment / detachment device of this embodiment, the operation member 6 is rotated counterclockwise to retract the lock pieces 12 and 13 from the motor shaft insertion hole 10 a of the base 10 via the action pieces 15 and 16. As a result, the hold cap 52 biased by the pressing spring 53 enters the motor shaft insertion hole 10a from below. Since the screw parts 12a and 13a of the lock pieces 12 and 13 are pushed by the hold cap 52 by this approach, the lock pieces 12 and 13 maintain the state retracted from the motor shaft insertion hole 10a as shown in FIG. Therefore, even if the operation on the operation member 6 is released, the lock pieces 12 and 13 do not advance into the motor insertion hole 10a. In the state where the operation on the operation member 6 is released, the operation member 6 is biased by the return spring 8 so as to rotate in the reverse direction (clockwise).

  In this state, the one-touch attaching / detaching device is brought close to the motor shaft 4, and the screw portion 4a of the motor shaft 4 is inserted into the motor shaft insertion hole 10a. FIG. 16 shows this state, and the tip of the screw portion 4a of the motor shaft 4 enters the motor shaft insertion hole 10a while pushing the upper surface portion 52a of the hold cap 52. Accordingly, the hold cap 52 moves downward in the motor shaft insertion hole 10 a while pushing the pressing spring 53. In this state, the hold cap 52 maintains the retracted state of the lock pieces 12 and 13 from the motor shaft insertion hole 10 a, so that the lock pieces 12 and 13 may interfere with or bite into the screw portion 4 a of the motor shaft 4. Therefore, the motor shaft 4 can be smoothly inserted into the motor shaft insertion hole 10a without operating the operation member 6.

  FIG. 17 shows a state in which the screw portion 4a of the motor shaft 4 is completely inserted into the motor shaft insertion hole 10a of the base 10, and the hold cap 52 moves downward to come out between the lock pieces 12 and 13. Become. At this time, since the operating member 6 is urged by the return spring 8 to rotate in the return direction, the lock pieces 12 and 13 are advanced into the motor shaft insertion hole 4a via the engagement mechanisms 31 and 32. It has become. At this time, since the elastic body 14 holds the lock pieces 12 and 13 from above and below, the crests of the screw portions 12 a and 13 a of the lock pieces 12 and 13 are crests of the screw portion 4 a of the motor shaft 4. And matches smoothly. Thus, the lock pieces 12 and 13 are instantaneously moved in the direction of the motor shaft 4, and the screw portions 12a and 13a of the lock pieces 12 and 13 are engaged with the screw portion 4a of the motor shaft 4 as shown in FIG. Because of the engagement, the one-touch attachment / detachment device can be attached to the motor shaft 4. Since a collision sound is generated when the lock piece 12 or 13 is engaged with the screw portion 4a of the motor shaft 4, it can be determined by sound that the one-touch attachment / detachment device is attached to the motor shaft 4. .

  Removal of the one-touch attachment / detachment device from the motor shaft 4 rotates the operation member 6 counterclockwise. As a result, the lock pieces 12 and 13 move away in a linear direction perpendicular to the axial direction of the motor shaft 4 and the screw portions 12a and 13a are detached from the screw portion 4a of the motor shaft 4, so that the one-touch attachment / detachment device is removed. Can do. In the removal of the one-touch attachment / detachment device, the hold cap 52 enters between the lock pieces 12 and 13 by the urging force of the pressing spring 53 and returns to the state shown in FIG.

  FIG. 19 shows a case where the insertion is stopped while the motor shaft 4 is inserted into the motor shaft insertion hole 10a of the base 10. In this case, since the hold cap 52 stops between the lock pieces 12 and 13, the lock pieces 12 and 13 do not advance in the direction of the motor shaft insertion hole 10 a, and the screw portions 12 a and 13 a are attached to the motor shaft 4. It does not engage with the threaded portion 4a. Therefore, the one-touch attachment / detachment device is not attached to the motor shaft 4 in an incomplete state, and it is possible to prevent the one-touch attachment / detachment device from dropping due to the incomplete attachment.

(Embodiment 4)
20 to 23 show a one-touch attachment / detachment device for a fan according to Embodiment 4 of the present invention. FIG. 20 is a plan view, FIG. 21 is a cross-sectional view taken along line FF in FIG. 20, and FIGS. It is the GG sectional view taken on the line of FIG.

  The one-touch attachment / detachment device for a fan according to this embodiment changes the operation member 6 and the return spring 8 in the first embodiment, and the other configurations are the same as those of the one-touch attachment / detachment device of the first embodiment. In this embodiment, the hold mechanism 51 in the third embodiment is provided. As shown in FIG. 21, the hold mechanism 51 moves up and down to move into the motor shaft insertion hole 10a of the base 10, and the hold cap 52 enters the motor shaft insertion hole 10a. And a pressing spring 53 for biasing.

  As in the first and third embodiments, the base 10 is provided with a pair of lock pieces 12 and 13 as engagement pieces 41 and a pair of action pieces 15 and 16 connected to the respective lock pieces 12 and 13. It is provided on both sides of the hole 10a. Screw portions 12 a and 13 a that are engaged with and engaged with the screw portion 4 a of the motor shaft 4 are formed on the front end surfaces of the lock pieces 12 and 13. As shown in FIG. 21, the lock pieces 12 and 13 and the action pieces 15 and 16 are tapered surfaces 12c, 15c, 13c, and 16c whose distance from the motor shaft 4 gradually increases along the insertion direction of the motor shaft 4. Is touching through. Further, an elastic body 14 is provided between the lock pieces 12 and 13 and the base 10 to hold the lock pieces 12 and 13 by sandwiching the lock pieces 12 and 13 from above and below.

  As shown in FIGS. 22 and 23, the operation member 6 has a guide portion 22 and an operation portion 23. The operation member 6 of this embodiment moves linearly with respect to the base 10, and the operation portion 23 protrudes from the housing portion 5 a of the cover 5, and the operation portion 23 is pressed by pressing the operation portion 23. It is pushed into the cover 5 and moves linearly.

  The guide portion 22 is formed in a substantially semi-circular arm shape when viewed from above, and an operation portion 23 is provided at the center portion thereof. Thereby, the guide part 22 has branched from the operation part 23 to the left and right. The operation portion 23 is provided in a direction orthogonal to the arrangement direction connecting the lock pieces 12 and 13 and the action pieces 15 and 16, and the guide portion 22 having a substantially semicircular arm shape is formed by pressing the operation portion 23. 12 and 13 and the action pieces 15 and 16 are moved and displaced linearly in a direction orthogonal to the straight line connecting them.

  A guide surface 55 that extends along the direction in which the guide portion 22 moves linearly is formed at each branched tip end portion of the guide portion 22. A receiving surface 56 on which the guide surface 55 is slidable is linearly formed at a portion corresponding to the guide surface 55 in the base 10. With the guide surface 55 and the receiving surface 56, the operation member 6 can stably move linearly in the above-described direction. Further, a stopper surface 58 extending in a direction orthogonal to the receiving surface 56 is formed on the base 10, and the guide portion 22 abuts (collises) with the stopper surface 58 so that the guide portion 22 moves linearly. Is regulated.

  Each action piece 15, 16 is in a state of sandwiching a left and right branched portion of the guide portion 22, and an engagement mechanism 31, 32 is formed between the action piece 15, 16 and the portion where the guide portion 22 is sandwiched. Has been. As in the first embodiment, the engagement mechanisms 31 and 32 sandwich the guide portions 22 between the first engagement convex portions 33 and 34 formed on the inner sides of the guide portions 22 of the action pieces 15 and 16. It has the 2nd engagement convex parts 35 and 36 formed in the outer side. The engagement mechanisms 31 and 32 include inner diameter changing portions 37 and 38 formed on the inner surface of the guide portion 22 so as to correspond to the first engagement convex portions 33 and 34, and second engagement convex portions 35 and 36. And support convex portions 39 and 40 formed on the outer surface of the guide portion 22. Each of the supporting convex portions 39 and 40 has a slope shape and protrudes from the outer surface of the guide portion 22. Each of the inner diameter changing portions 37 and 38 is formed by large-diameter concave portions 37a and 38a and curved surface portions 37b and 38b continuously decreasing from the large-diameter concave portions 37a and 38a.

  The return spring 8 is a coil spring and is disposed between the base 10 and the operation member 6. One end of the return spring 8 is in contact with the back surface of the operation portion 23 of the operation member 6, and the other end is in contact with the bottom surface of the spring hole 57 formed in the base 10, so that the operation member 6 protrudes from the cover 5. It is fast.

  FIG. 22 shows a state in which the screw portions 12 a, 13 a of the lock pieces 12, 13 are not engaged with the screw portion 4 a of the motor shaft 4 by retreating from the motor shaft insertion hole 10 a of the base 10. The hold cap 52 is located in the motor shaft insertion hole 10a. FIG. 23 shows a state in which the screw portions 12 a and 13 a of the lock pieces 12 and 13 have advanced into the motor shaft insertion hole 10 a and engaged with the screw portion 4 a of the motor shaft 4, whereby the one-touch attachment / detachment device is attached to the motor shaft 4. Indicates.

In the one-touch attachment / detachment apparatus of this embodiment, the operation unit 23 is pushed into the cover 5 as shown in FIG. As a result, the entire operation member 6 moves linearly along the pushing direction, and the guide portion 22 moves linearly in the same direction. As the guide portion 22 moves linearly, the support convex portions 39 and 40 of the guide portion 22 come into contact with the second engaging convex portions 35 and 36 of the action pieces 15 and 16, and the action pieces 15 and 16 are moved to the motor shaft. It is moved linearly in a direction away from the insertion hole 10a. At this time, the first engaging convex portions 33 and 34 of the action pieces 15 and 16 face the large-diameter concave portions 37a and 38a of the guide portion 22 with a gap, and the first engaging convex portions 33 and 34 are guide portions. 22 is not in contact. Since the lock pieces 12 and 13 are moved in the same direction by the movement of the action pieces 15 and 16, the screw portions 12a and 13a of the lock pieces 12 and 13 are retracted from the motor shaft insertion hole 10a of the base 10. As a result, as in the third embodiment, the hold cap 52 enters the motor insertion hole 10a and maintains the retracted state of the lock pieces 12 and 13. At this time, the return spring 8 is shortened by pushing the operating member 6 and the urging force in the opposite direction is stored.

  In such a state of FIG. 22, the motor shaft 4 can be inserted into the motor shaft insertion hole 10a. When the motor shaft 4 is inserted, the hold cap 52 is pushed by the motor shaft 4 and moves downward in the motor insertion hole 10a, so that the hold cap 52 comes out from between the lock pieces 12 and 13. At this time, since the return spring 8 is biased so that the operation member 6 moves linearly in the return direction, the lock pieces 12 and 13 advance into the motor shaft insertion hole 4a via the engagement mechanisms 31 and 32. To do. That is, by the linear return movement of the operation member 6, the support convex portions 39 and 40 in the guide portion 22 of the operation member 6 are released from contact with the second engagement convex portions 35 and 36 of the action pieces 15 and 16. 23, since the curved surface portions 37b, 38b of the inner diameter changing portions 37, 38 of the guide portion 22 abut on the first engaging convex portions 33, 34 of the action pieces 15, 16, the action pieces 15, 16 Moves linearly in the direction of the motor shaft 4, and the lock pieces 12, 13 move linearly in the direction of the motor shaft 4 along with this movement. As a result, the screw portions 12 a and 13 a of the lock pieces 12 and 13 are engaged with and engaged with the screw portion 4 a of the motor shaft 4. At this time, since the elastic body 14 elastically holds the lock pieces 12 and 13 from above and below, the peaks and valleys of the screw portions 12 a and 13 a coincide with the peaks and valleys of the screw portion 4 a of the motor shaft 4, and these engage with each other. be able to. In such a biting operation, a collision sound is generated, so that attachment to the motor shaft 4 can be determined by sound.

As described above, since the screw portions 12a and 13a of the lock pieces 12 and 13 are engaged with and engaged with the screw portion 4a of the motor shaft 4, the one-touch attachment / detachment device is attached to the motor shaft 4 without operating the operation member 6. Can do. Further, according to such an embodiment, since the motor shaft 4 can be attached and detached by a linear pushing operation to the operation member 6, the operability is higher than the rotation operation to the operation member 6. Greatly improved.

(Embodiment 5)
24 to 27 show a one-touch attachment / detachment device for a fan according to Embodiment 5 of the present invention, FIG. 24 is a plan view, FIG. 25 is a sectional view taken along the line HH in FIG. 24, and FIGS. It is the II sectional view taken on the line of FIG.

  In this embodiment, the operation member 6 and the return spring 8 and the engagement piece 41 in the first embodiment are changed, and the other configurations are the same as those of the one-touch attachment / detachment device in the first embodiment. . In this embodiment, the hold mechanism 51 in the third embodiment is provided. As shown in FIG. 25, the hold mechanism 51 includes a hold cap 52 that moves into the motor insertion hole 10a of the base 10, and a pressing spring 53 that biases the hold cap 52 to enter the motor insertion hole 10a. Is formed by.

  As shown in FIGS. 25 to 27, the engagement piece 41 in this embodiment is provided only on one side of the base 10 on both sides of the motor insertion hole 10a. That is, the engagement piece 41 is formed by one lock piece 12 provided on one side (left side) of the motor insertion hole 10 a and one action piece 15 connected to the lock piece 12. A screw portion 12 a that is engaged with and engaged with the screw portion 4 a of the motor shaft 4 is formed on the front end surface of the lock piece 12. As shown in FIG. 25, the lock piece 12 and the action piece 15 are in contact with each other via tapered surfaces 12 c and 15 c whose distance from the motor shaft 4 gradually increases along the insertion direction of the motor shaft 4. Further, an elastic body 14 is provided between the lock piece 12 and the base 10 to hold the lock piece 12 by sandwiching the lock piece 12 from above and below.

  As shown in FIGS. 26 and 27, the operation member 6 includes a guide portion 22 formed in a C shape when viewed from above and an operation portion 23 formed integrally with the guide portion 22. A circular fulcrum portion 61 is formed on one end side of the guide portion 22 (right end side in FIGS. 26 and 27), and a shaft pin 62 provided on the base 10 is inserted into the fulcrum portion 61. As a result, the guide portion 22 can rotate around the fulcrum portion 61. The operation part 23 is provided at an intermediate part of the guide part 22 and projects outward from the housing part 5 a of the cover 5. The guide portion 22 rotates around the shaft pin 62 by linearly pressing the operation portion 23 so as to push it in.

  The action piece 15 is in a state of sandwiching a portion on the other end side (the left end side in FIGS. 26 and 27) of the guide portion 22, and between the action piece 15 and the guide portion 22 on the other end side. An engagement mechanism 31 is formed. The engaging mechanism 31 is provided corresponding to the locking piece 41, and is therefore provided only on one side of the base 10 on both sides of the motor insertion hole 10a. The engaging mechanism 31 includes a first engaging convex portion 33 formed on the inner side of the guide piece 22 in the action piece 15, a second engaging convex portion 35 formed on the outer side of the guide portion 22, An inner diameter changing portion 37 formed on the inner surface of the guide portion 22 so as to correspond to the first engaging convex portion 33, and a support convex formed on the outer surface of the guide portion 22 so as to correspond to the second engaging convex portion 35. Part 39. The support convex part 39 is formed in a planar shape. The inner diameter changing portion 37 is formed by a large-diameter concave portion 37a and a curved surface portion 37b having a diameter that gradually decreases and continues to the large-diameter concave portion 37a.

  The return spring 8 is a coil spring and is disposed between the base 10 and the operation member 6. One end of the return spring 8 is in contact with the back side portion of the operation portion 23 of the operation member 6, and the other end is in contact with the bottom surface of a spring hole 57 formed in the base 10, so that the operation member 6 protrudes from the cover 5. It is energized to rotate.

  FIG. 26 shows a state in which the screw portion 12 a of the lock piece 12 is not engaged with the screw portion 4 a of the motor shaft 4 by retreating from the motor insertion hole 10 a of the base 10. At this time, the hold cap 52 enters the motor insertion hole 10 a of the base 10. FIG. 27 shows a state in which the screw portion 12 a of the lock piece 12 has advanced into the motor shaft insertion hole 10 a of the base 10 and engaged with the screw portion 4 a of the motor shaft 4. In this state, the one-touch attachment / detachment device is attached to the motor shaft 4.

  In the one-touch attachment / detachment apparatus of this embodiment, the operation unit 23 is linearly pushed into the cover 5 as shown in FIG. By this pushing, the entire operation member 6 is rotated counterclockwise about the shaft pin 62, and the guide portion 22 is rotated in the same direction. As the guide portion 22 rotates, the support convex portion 39 of the guide portion 22 abuts on the second engaging convex portion 35 of the action piece 15 to linearly move the action piece 15 in a direction away from the motor shaft insertion hole 10a. . At this time, the first engaging convex portion 33 of the action piece 15 faces the large-diameter concave portion 37 a of the guide portion 22 with a gap, and the first engaging convex portion 33 is not in contact with the guide portion 22. ing. Since the lock piece 12 also moves in the same direction by the movement of the action piece 15, the screw portion 12a of the lock piece 12 retracts from the motor shaft insertion hole 10a of the base 10. As a result, the hold cap 52 enters the motor insertion hole 10a and maintains the retracted state of the lock piece 12. At this time, the return spring 8 is shortened by pushing the operating member 6 and the urging force in the opposite direction is stored.

  In such a state of FIG. 26, the motor shaft 4 can be inserted into the motor shaft insertion hole 10a. Since the hold cap 52 is pushed by the motor shaft 4 by the insertion of the motor shaft 4 and moves downward in the motor insertion hole 10a, the hold cap 52 comes out of the motor shaft insertion hole 10a. At this time, since the return spring 8 is biased so that the operation member 6 rotates in the reverse direction, the lock piece 12 advances into the motor shaft insertion hole 4 a via the engagement mechanism 31. That is, by the rotation of the operation member 6, the support convex portion 39 in the guide portion 22 of the operation member 6 is released from the contact with the second engagement convex portion 35 of the action piece 15. 27, since the curved surface portion 37b of the inner diameter changing portion 37 of the guide portion 22 contacts the first engaging convex portion 33 of the action piece 15, the action piece 15 linearly extends in the direction of the motor shaft 4. With this movement, the lock piece 12 moves linearly in the direction of the motor shaft 4. As a result, the screw portion 12 a of the lock piece 12 is engaged with and engaged with the screw portion 4 a of the motor shaft 4. At this time, since the elastic body 14 holds the lock piece 12 from above and below, the peaks and valleys of the screw portion 12a coincide with the peaks and valleys of the screw portion 4a of the motor shaft 4 so that they can be engaged with each other.

As described above, since the screw portion 12a of the lock piece 12 is engaged with and engaged with the screw portion 4a of the motor shaft 4, the one-touch attachment / detachment device can be attached to the motor shaft 4 without operating the operation member 6. Since a collision sound is generated when the lock piece 12 is engaged with the screw portion 4 a of the motor shaft 4, it can be determined by sound that the one-touch attachment / detachment device is attached to the motor shaft 4. In such an embodiment, the engagement piece 41 having the lock piece 12 to be engaged with the screw portion 4 a of the motor shaft 4 and the engagement mechanism 31 for moving the lock piece 12 forward and backward are provided in the motor shaft insertion hole 10 a of the base 10. Since it is provided only on one side, the number of parts is reduced, a simple structure can be obtained, and maintenance is facilitated. Further, since the operation member 6 is rotated by a linear pushing operation to the operation unit 23, the operability is remarkably improved as compared with the rotation operation to the operation unit 23.

(Embodiment 6)
28 to 31 show a one-touch attachment / detachment device for a fan according to Embodiment 6 of the present invention, FIG. 28 is a plan view, FIG. 29 is a sectional view taken along line JJ in FIG. 28, and FIGS. It is the KK sectional view taken on the line of FIG.

  In this embodiment, the operation member 6 and the return spring 8 and the engagement piece 41 in the first embodiment are changed, and the other configurations are the same as those of the one-touch attachment / detachment device in the first embodiment. . In this embodiment, the hold mechanism 51 in the third embodiment is provided. As shown in FIG. 29, the hold mechanism 51 includes a hold cap 52 that moves into the motor insertion hole 10a of the base 10, and a pressing spring 53 that biases the hold cap 52 to enter the motor insertion hole 10a. Is formed by.

  As shown in FIGS. 29 to 31, the engagement piece 41 in this embodiment is provided only on one side on both sides of the motor insertion hole 10 a of the base 10. That is, the engagement piece 41 is formed by one lock piece 12 provided on one side (left side) of the motor insertion hole 10 a and one action piece 15 connected to the lock piece 12. A screw portion 12 a that is engaged with and engaged with the screw portion 4 a of the motor shaft 4 is formed on the front end surface of the lock piece 12. As shown in FIG. 29, the lock piece 12 and the action piece 15 are in contact with each other via tapered surfaces 12c and 15c whose distance from the motor shaft 4 gradually increases along the insertion direction of the motor shaft 4. Further, an elastic body 14 is provided between the lock piece 12 and the base 10 to hold the lock piece 12 by sandwiching the lock piece 12 from above and below.

  As shown in FIGS. 30 and 31, the operation member 6 includes a guide portion 22 formed in a U shape when viewed from above and an operation portion 23 formed integrally with the guide portion 22. The guide portion 22 is provided so as to sandwich the motor shaft insertion hole 10 a of the base 10. One side (left side) sandwiching the motor shaft insertion hole 10 a is an engagement mechanism forming portion 64 described later, and the other side (right side) is a guide arm portion 63. The operation part 23 is provided at an intermediate part of the guide part 22 and projects outward from the housing part 5 a of the cover 5. By pushing the operating portion 23, the entire operating member 6 moves linearly with respect to the base 10 and is displaced. This linear displacement is in a direction perpendicular to the straight line connecting the lock piece 12 and the action piece 15.

  The guide arm portion 63 of the operation member 6 extends linearly along the moving direction of the operation member 6. On the other hand, a linear guide groove 65 is formed in the base 10, and the guide arm part 63 is disposed inside the base 10 by inserting the guide arm part 63 into the guide groove 65. . When the operation member 6 is moved, the guide arm portion 63 slides in the guide groove 65, so that the operation member 6 can be stably linearly moved by this sliding.

  A guide surface 55 extending along the direction in which the guide portion 22 moves linearly is formed at the distal end portion of the engagement structure forming portion 64 in the guide portion 22. A receiving surface 56 on which the guide surface 55 is slidable is linearly formed at a portion corresponding to the guide surface 55 in the base 10. In this embodiment, since the guide surface 55 and the receiving surface 56 are formed in addition to the guide arm portion 63 described above, the operation member 6 can stably move linearly. Further, a stopper surface 58 extending in a direction orthogonal to the receiving surface 56 is formed on the base 10, and the linear movement of the guide portion 22 is stopped when the guide portion 22 abuts on the stopper surface 58.

  The action piece 15 is in a state of sandwiching a portion of the engagement mechanism forming portion 64 (left side in FIGS. 30 and 31) in the guide portion 22, and the engagement mechanism 31 is interposed between the action piece 15 and the engagement structure forming portion 64. Is formed. The engaging mechanism 31 is provided corresponding to the locking piece 41, and is therefore provided only on one side of the base 10 on both sides of the motor insertion hole 10a. The engaging mechanism 31 is formed on the outer side of the first engagement convex portion 33 formed on the inner side of the engaging piece 15 of the guide portion 22 of the action piece 15 and on the outer side of the engaging mechanism forming portion 64. Corresponding to the second engaging convex portion 35, the inner diameter changing portion 37 formed on the inner surface of the engaging mechanism forming portion 64 so as to correspond to the first engaging convex portion 33, and the second engaging convex portion 35. As described above, the support protrusion 39 is formed on the outer surface of the engagement mechanism forming portion 64. The support convex part 39 is formed in a planar shape. The inner diameter changing portion 37 is formed by a large-diameter concave portion 37a and a curved surface portion 37b having a diameter that gradually decreases and continues to the large-diameter concave portion 37a.

  The return spring 8 is a coil spring and is disposed between the base 10 and the operation member 6. One end of the return spring 8 is in contact with the back side portion of the operation portion 23 of the operation member 6, and the other end is in contact with the bottom surface of the spring hole 57 formed in the base 10 so that the operation member 6 protrudes from the cover 5. Energized.

  FIG. 30 shows a state in which the screw portion 12 a of the lock piece 12 is not engaged with the screw portion 4 a of the motor shaft 4 by retreating from the motor insertion hole 10 a of the base 10. At this time, the hold cap 52 enters the motor insertion hole 10 a of the base 10. FIG. 31 shows a state in which the screw portion 12 a of the lock piece 12 advances into the motor shaft insertion hole 10 a of the base 10 and engages with the screw portion 4 a of the motor shaft 4. In this state, the one-touch attachment / detachment device is attached to the motor shaft 4.

  In the one-touch attachment / detachment apparatus of this embodiment, the operation unit 23 is linearly pushed into the cover 5 as shown in FIG. By this pushing, the entire operation member 6 moves linearly. By the linear movement of the guide part 22, the support convex part 39 of the guide part 22 contacts the second engagement convex part 35 of the action piece 15, and the action piece 15 is linearly moved in the direction away from the motor shaft insertion hole 10a. . At this time, the first engaging convex portion 33 of the action piece 15 faces the large-diameter concave portion 37 a of the guide portion 22 with a gap, and the first engaging convex portion 33 is not in contact with the guide portion 22. ing. Since the lock piece 12 also moves in the same direction by the movement of the action piece 15, the screw portion 12a of the lock piece 12 retracts from the motor shaft insertion hole 10a of the base 10. As a result, the hold cap 52 enters the motor insertion hole 10a and maintains the retracted state of the lock piece 12. Therefore, the lock piece 12 does not inadvertently interfere with or bite into the screw portion 4a of the motor shaft 4, and it is not necessary to continue the operation on the operation member 6 in order to prevent them. At this time, the return spring 8 is shortened by pushing the operating member 6 and the urging force in the opposite direction is stored.

  In the state of FIG. 30, the motor shaft 4 can be inserted into the motor shaft insertion hole 10a. Since the hold cap 52 is pushed by the motor shaft 4 by the insertion of the motor shaft 4 and moves downward in the motor insertion hole 10a, the hold cap 52 comes out of the motor shaft insertion hole 10a. At this time, since the return spring 8 is biased so that the operation member 6 moves in the reverse direction (return direction), the lock piece 12 advances into the motor shaft insertion hole 4 a via the engagement mechanism 31. That is, by the return movement of the operation member 6, the support convex portion 39 in the guide portion 22 of the operation member 6 is released from the contact with the second engagement convex portion 35 of the action piece 15. As shown in FIG. 31, the curved surface portion 37 b of the inner diameter changing portion 37 of the guide portion 22 abuts on the first engagement convex portion 33 of the action piece 15, so that the action piece 15 linearly extends in the direction of the motor shaft 4. With this movement, the lock piece 12 moves linearly in the direction of the motor shaft 4. As a result, the screw portion 12 a of the lock piece 12 is engaged with and engaged with the screw portion 4 a of the motor shaft 4. At this time, since the elastic body 14 holds the lock piece 12 from above and below, the peaks and valleys of the screw portion 12a coincide with the peaks and valleys of the screw portion 4a of the motor shaft 4 so that they can be engaged with each other.

As described above, since the screw portion 12 a of the lock piece 12 is engaged with and engaged with the screw portion 4 a of the motor shaft 4, the one-touch attachment / detachment device can be attached to the motor shaft 4. Since a collision sound is generated when the lock piece 12 is engaged with the screw portion 4 a of the motor shaft 4, it can be determined by sound that the one-touch attachment / detachment device is attached to the motor shaft 4.

According to such an embodiment, since the motor shaft 4 can be attached and detached by a linear push operation to the operation member 6, the operability is markedly greater than the rotation operation to the operation member 6. improves. Further, an engagement piece 41 having a lock piece 12 to be engaged with the screw portion 4a of the motor shaft 4 and an engagement mechanism 31 for moving the lock piece 12 forward and backward are provided only on one side of the motor shaft insertion hole 10a of the base 10. Therefore, the number of parts is reduced, a simple structure can be obtained, and maintenance is facilitated.

(Embodiment 7)
32 and 33 show a one-touch attachment / detachment device for a fan according to Embodiment 7 of the present invention. FIG. 32 is a cross-sectional view at the initial stage of insertion of the motor shaft, and FIG.

  The one-touch attachment / detachment device of this embodiment is the same as the structure of the third embodiment shown in FIGS. 15 to 19 and has a structure in which a sound generating member 67 is further added to the structure of the third embodiment. Therefore, since the basic structure is the same as that of the third embodiment, the same reference numerals as those of the member of the third embodiment are attached and the description thereof is omitted.

  The sound generating member 67 is provided corresponding to the hold cap 52 of the hold mechanism 51, and a recess 68 for arranging the sound generating member 67 is formed at the bottom of the base 10. The recess 68 has a larger diameter than the insertion recess 70 into which the hold cap 52 of the hold mechanism 51 is inserted, and is formed at the bottom of the base 10 so as to be positioned around the insertion recess 70. The sound generating member 67 is disposed between the recess 68 and the bottom 69 of the cover 5.

  The sound generating member 67 is disposed in the recessed portion 68 so that a flange-like stopper portion 52b formed at the lower end portion of the hold cap 52 contacts. The sound generating member 67 is made of a material that deforms itself and generates sound when the stopper portion 52b of the hold cap 52 comes into contact therewith. In this embodiment, a disc spring that is inverted upside down when the stopper portion 52b of the hold cap 52 abuts is used.

  In this embodiment, as shown in FIG. 32, the sound generating member 67 made of a disc spring is moved upward while the outer peripheral portion is in contact with the bottom surface 69 of the cover 5 in the initial insertion of the motor shaft 4 into the motor shaft insertion hole 10a. Convex shape curved toward On the other hand, when the insertion of the motor shaft 4 into the motor shaft insertion hole 10a is completed, the hold cap 52 is pushed downward by the motor shaft 4 as shown in FIG. 52 b contacts the sound generating member 67. As a result, the sound generating member 67 is reversed so that the outer peripheral portion comes into contact with the recessed portion 68 in the base 10 and is curved downward. Sound is generated during this reversal. In this state, the hold cap 52 is retracted from between the lock pieces 12 and 13, and the screw portions 12 a and 13 a are engaged with the screw portion 4 a of the motor shaft 4 so that the one-touch attachment / detachment device is attached to the motor shaft 4. . Therefore, since a sound is generated when the motor shaft 4 is attached, it is possible to determine the attachment to the motor shaft 4 by sound. Further, since the one-touch attachment / detachment device 1 is detached from the motor shaft 4, the hold cap 52 moves upward by the urging force of the pressing spring 53 when the motor shaft 4 comes out of the motor shaft insertion hole 10 a. Due to this movement, the stopper portion 52b is released from contact with the sound generating member 67, so that the sound generating member 67 is inverted from a concave shape to a convex shape. Since a sound is generated during this reversal, it can be determined by sound that the one-touch attachment / detachment device has been removed from the motor shaft 4.

(Embodiment 8)
FIG. 34 is a cross-sectional view of the fan one-touch attachment / detachment device according to the eighth embodiment of the present invention. The one-touch attachment / detachment device for a fan in this embodiment changes the hold mechanism 51 in the third to seventh embodiments, and the other structures are the same as those in the third to seventh embodiments. Therefore, the description of each member is abbreviate | omitted by attaching | subjecting the same code | symbol as the member of Embodiment 3-7, and making it respond | correspond.

  The hold mechanism 51 in this embodiment is entirely formed by a hold spring 71 made of a coil spring. The hold spring 71 is formed by a pitch-winding (coarse winding) pressing coil portion 71a attached in the base 10 and a close-winding holding coil portion 71b connected to the pressing coil portion 71a. A hold spring 71 is inserted into the motor shaft insertion hole 10a so that the hold coil portion 71b is positioned between the lock pieces 12 and 13, and the hold coil portion 71b functions as the hold cap 52. The hold coil portion 71b is pressed by the motor shaft 4 when the motor shaft 4 is inserted into the motor shaft insertion hole 10a and the screw portion 4a of the motor shaft 4 abuts.

  In such a structure, in a state where the motor shaft 4 is not inserted into the motor shaft insertion hole 10a, the hold coil portion 71b is urged by the pressing coil portion 71a. Located in. This prevents the lock pieces 12 and 13 from entering the motor shaft insertion hole 10a. On the other hand, when the motor shaft 4 is inserted into the motor shaft insertion hole 10a, the hold coil portion 71b is pushed by the motor shaft 4, so that it retracts from between the lock pieces 12 and 13. As a result, the lock pieces 12, 13 advance into the motor shaft insertion hole 10 a and engage with the screw portion 4 a of the motor shaft 4. By this engagement, the one-touch attachment / detachment device is attached to the motor shaft 4. In such an embodiment, since the hold mechanism 51 can be formed by a single coil spring, the number of parts is reduced and a simple structure can be achieved.

(Embodiment 9)
FIG. 35 is a sectional view of a fan one-touch attachment / detachment device according to Embodiment 9 of the present invention. The one-touch attachment / detachment device of this embodiment is different from the hold mechanism 51 in the sixth embodiment, and the other structure is the same as that of the sixth embodiment. Therefore, the description of each member is abbreviate | omitted by attaching | subjecting the same code | symbol as the member of Embodiment 6, and making it respond | correspond.

  In this embodiment, the hold cap 52 in the hold mechanism 51 is changed. As in the third to seventh embodiments, the hold cap 52 has a cylindrical portion 73 formed in a cylindrical shape with the upper surface portion closed and the lower surface portion opened, and a contact arm portion formed integrally with the cylindrical portion 73. 72. The cylindrical portion 73 is pushed by the screw portion 4a of the motor shaft 4 by inserting the motor shaft 4 into the motor shaft insertion hole 10a. The contact arm portion 72 extends from the tubular portion 73 in the direction of the action piece 15. The action piece 15 is a structural member that forms the engagement piece 41 together with the lock piece 12, and in this embodiment, the action piece 15 is disposed on one side of the motor shaft insertion hole 12a.

  The contact arm portion 72 extends so as to contact the end surface (right end surface) of the action piece 15 in a state of straddling the lock piece 12 engaged with the action piece 15. As a result, when the motor shaft 4 is not inserted into the motor shaft insertion hole 10a and the hold cap 52 is positioned within the motor shaft insertion hole 10a, the contact arm portion 72 inserts the action piece 15 into the motor shaft. It pushes away from the hole 10a. Therefore, in this state, the contact arm portion 72 prevents the lock piece 12 engaged with the action piece 15 from moving into the motor shaft insertion hole 10a. On the other hand, when the motor shaft 4 is inserted into the motor shaft insertion hole 10a and the hold cap 52 comes out of the motor shaft insertion hole 10a, the contact arm portion 72 is disengaged from contact with the action piece 15. 12 can advance into the motor shaft insertion hole 10a, whereby the screw portion 12a of the lock piece 12 engages with the screw portion 4a of the motor shaft 4, and the one-touch attachment / detachment device is attached to the motor shaft 4. In such a structure, since the holding mechanism 51 does not hinder the vertical movement of the lock piece 12, the engagement between the screw portion 12a of the lock piece 12 and the screw portion 4a of the motor shaft 4 is performed more smoothly. be able to.

DESCRIPTION OF SYMBOLS 1 One-touch attachment / detachment apparatus 2 Fan 3 Fan motor 4 Motor shaft 4a Screw part 5 Cover 6 Operation member 8 Return spring 10 Base 10a Motor shaft insertion hole 10b Circular shaft part 12, 13 Lock piece 12a, 12b Connection part 12c, 13c Taper part 14 Elastic body 15, 16 Action piece 15c, 16c Tapered surface 22 Guide part 23 Operation part 31, 32 Engagement mechanism 33, 34 First engagement convex part 35, 36 Second engagement convex part 37, 38 Inner diameter changing part 39, 40 support convex part 41 engaging piece 42 engaged part 43 engaging part 44 constricted part 51 hold mechanism 52 hold cap 53 pressing spring

Claims (8)

A fan one-touch attachment / detachment device that is detachably attached to the motor shaft and connects the fan to the motor shaft by inserting a motor shaft of a fan motor that rotates the fan,
A motor shaft insertion hole into which the motor shaft is inserted, and a base fixed inside a cover fixed to the fan;
An operation member having a guide portion and an operation portion movably attached to the base;
An engagement piece formed on the base in a state in which an engagement portion that can be engaged with an engaged portion on the outer peripheral surface of the motor shaft is formed and the guide portion is sandwiched so as to be able to reciprocate in the direction of the motor shaft. When,
A return spring for returning the operation member moved by the operation to the operation unit,
The portion of the engagement piece sandwiching the guide portion and the corresponding portion of the guide portion corresponding thereto are brought into contact with and separated from each other as the guide portion moves, so that the engagement piece is moved in the direction of the motor shaft. An engagement mechanism for reciprocally moving the engagement piece is moved forward and backward with respect to the motor shaft by the contact and separation of the engagement mechanism, and the engagement portion of the engagement piece is engaged with the engaged portion of the motor shaft. A fan one-touch attachment and detachment device characterized by engaging and releasing. The one-touch attachment / detachment device for a fan according to claim 1,
The engagement mechanism includes an inner diameter changing portion in which an inner diameter of the guide portion is changed along a moving direction of the guide portion, a support convex portion formed on an outer surface of the guide portion, and the guide portion in the engagement piece. A first engagement convex portion provided on one side of the engagement piece and capable of contacting the inner diameter changing portion, and a first engagement convex portion provided on the other side of the engagement piece with the guide portion interposed therebetween and capable of contacting the support convex portion. A fan one-touch attaching / detaching device, wherein the fan is formed by two engaging convex portions. The one-touch attachment / detachment device for a fan according to claim 1 or 2,
The engaging piece engages with the engaged portion of the motor shaft by advancing into the motor shaft insertion hole, and prevents the engagement piece from entering the motor shaft insertion hole and the motor shaft insertion hole. A fan one-touch attachment / detachment device, wherein a hold mechanism for releasing the advance prevention by inserting a motor shaft into the base is provided on the base. It is the one-touch attachment or detachment apparatus of the fan of any one of Claims 1-3,
The fan one-touch attachment / detachment device, wherein the guide portion of the operation member is rotatable or linearly movable with respect to the base. It is the one-touch attachment or detachment apparatus of the fan of any one of Claims 1-4,
The engagement piece is composed of an action piece that is in contact with the guide part with the guide part being sandwiched, and a lock piece having the engagement part that can be engaged with the engaged part of the motor shaft, The action piece and the lock piece are in contact with each other via a taper surface, and the taper surface of the lock piece and the action piece is inclined in a direction to prevent the lock piece from being detached from the motor shaft. Detachable device. A fan one-touch attachment / detachment device according to any one of claims 1 to 5,
The fan one-touch attachment / detachment device, wherein the engagement piece is provided on at least one side of both sides of the motor shaft insertion hole. The one-touch attachment / detachment device for a fan according to any one of claims 1 to 6,
The one-touch attachment and detachment device for a fan, wherein the engaging portion of the engaging piece and the engaged portion of the motor shaft are screw portions having screw threads that mesh with each other. The one-touch attachment / detachment device according to claim 7,
The lock piece is provided on the base via an elastic body that allows the lock piece to move along the axial direction of the motor shaft in order to engage the screw portion of the lock piece with the screw portion of the motor shaft. One-touch attachment and detachment device for fans.

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