JP2023127113A - Electric fan - Google Patents

Abstract

To provide an electric fan capable of preventing or suppressing generation of noise due to rattling of a member.SOLUTION: An electric fan 1 which is a portable electric fan includes: a body part 10; a blower head having a rear impeller and a front impeller; and a switch 12 provided at the body part 10 so as to be pressed down. The switch 12 includes a press part 13 which has flexibility and which presses the body part 10 in the direction orthogonal to the press-down direction. The switch 12 is held by the body part 10 in a state of being pressed down in the press-down direction, and even in the case where vibration is generated, the rattling of the switch 12 can be prevented or suppressed.SELECTED DRAWING: Figure 5

Description

The present invention relates to an electric fan.

BACKGROUND ART Portable electric fans have been known for a long time. For example, Patent Document 1 discloses a portable electric fan including a main body and a blade unit rotatably supported with respect to the main body via a shaft. This electric fan is equipped with a push-type switch on the side of the main body to turn the electric fan on and off.

Utility model registration No. 3224868

By the way, in a small portable electric fan, when the electric fan is in an on state, members such as a switch provided on the main body may rattle due to vibrations caused by the rotation of the blades, and an abnormal noise may be generated. In the electric fan of Patent Document 1, when the electric fan is in the on state, the push-type switch may rattle with the main body due to vibration of the main body due to rotation of the blade unit, and there is a possibility that abnormal noise may be generated.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, an object of the present invention is to provide an electric fan that can prevent or suppress generation of abnormal noise due to rattling of members.

The present invention is a portable electric fan, which includes a main body, a blower head having an impeller, and a push-down member provided on the main body so as to be able to be pushed down, the push-down member being flexible. , has a pressing portion that presses the main body portion in a direction substantially perpendicular to the pressing direction.

According to the present invention, it is possible to provide an electric fan that can prevent or suppress the generation of abnormal noise due to rattling of members.

It is a perspective view of the electric fan concerning a 1st embodiment. FIG. 2 is an exploded perspective view of the electric fan according to the first embodiment, viewed from the front side. FIG. 2 is an exploded perspective view of the circuit board and switch of the electric fan according to the first embodiment, seen from the front side. FIG. 2 is an exploded perspective view of the front case and switch of the electric fan according to the first embodiment, seen from the rear side. FIG. 2 is a rear view of the front case and switch of the electric fan according to the first embodiment, seen from the rear side. It is a back view of the front case and switch of the electric fan according to the second embodiment, seen from the rear side.

(First embodiment)
A first embodiment of the present invention will be described with reference to FIGS. 1 to 5. As shown in FIG. 1, the electric fan 1 according to the present embodiment is a small portable electric fan 1, and includes a main body 10, a blower head 20 provided on the upper side of the main body 10, and a lower part of the main body 10. A carabiner part 30 provided on the side is provided. The electric fan 1 can blow air from the air blowing head 20 by holding the main body 10 and pressing the switch (pushing member) 12 . The configuration around the switch 12 will be explained in detail later. Further, the electric fan 1 can moor an object to the carabiner portion 30. Hereinafter, the side of the main body 10 where the switch 12 is provided (the downstream side of the air flow path) will be referred to as the front side of the fan 1, and the opposite side will be referred to as the rear side, and the right side and left side when the main body 10 is viewed from the front side are This will be explained as the right side and the left side of the electric fan 1.

The main body part 10 has a vertically elongated substantially rectangular parallelepiped shape, and includes a rear case (first case) 40 provided on the rear side, that is, on the upstream side of the ventilation flow path, and a front side (first direction side), that is, the ventilation flow path. It has a front case (second case) 50 provided on the downstream side of the road. By engaging and assembling the front case 50 to the front side of the rear case 40, a space is provided between the two. As shown in FIGS. 2 and 3, the space provided between the rear case 40 and the front case 50 accommodates the circuit board 14 (including the switch 12), the battery 16, the separator 18, and the like. The separator 18 is disposed between the circuit board 14 and the battery 16, and insulates and isolates them. Note that the separator 18 may be a double-sided tape for temporarily fixing the battery 16 during assembly.

A protruding wall portion 41 that protrudes forward in the shape of a wall is provided at the upper end portion of the rear case 40 on the opening side. A pair of engaging pawls (engaging portions) 42 are provided on both left and right sides of the protruding wall portion 41 and spaced apart in the left-right direction. Furthermore, a plurality of fitting convex portions 43 that protrude toward the front side are provided on the opening side edge of the rear case 40. On the other hand, a pair of engaged pawls (engaged portions) 52 are provided on both left and right sides of the upper end portion of the opening side of the front case 50 so as to be spaced apart in the left-right direction. Furthermore, a plurality of fitting recesses 53 are provided at the opening side edge of the front case 50, which are recessed toward the front side (see FIGS. 4 and 5). The main body portion 10 can be assembled by engaging the engaging claw 42 and the engaged claw 52 and fitting the fitting protrusion 43 into the fitting recess 53.

A rear accommodating portion 44 is provided at the lower part of the opening side of the rear case 40 and is cut out so that a portion of the carabiner portion 30 is accommodated therein. On the other hand, a front accommodating part 54 is provided at the lower part of the opening side of the front case 50, which is cut out so that a part of the carabiner part 30 is accommodated, and to which the carabiner part 30 is attached. Further, a substantially circular switch opening 56 is provided near the top of the front surface of the front case 50, in which the switch 12 is housed so as to be exposed to the front side.

A head assembly portion 58 to which the blower head 20 is assembled is provided at a portion of the upper end of the front case 50 on the front side of the engaged claw 52 . In other words, the part of the main body 10 where the blower head 20 is assembled is provided on the front side of the engaging part of the engaging claw 42 and the engaged claw 52. Both left and right sides of the head assembly portion 58 are front pivot supports 58a that protrude forward. The front shaft support 58a rotatably supports a front portion of a rotation shaft 26b1 of the blower head 20, which will be described later. The front end portions of both front side shaft supports 58a are approximately arcuate in side view. Front notches 58a1 each having a semicircular shape are provided at the left-right inner portions of both front shaft supports 58a so that the front portion of the rotation shaft 26b1 is rotatably supported (see FIG. 4 and Figure 5). A neck insertion portion 58b into which the neck 26 of the blower head 20 is inserted is formed between the front shaft supports 58a.

A rear shaft support member 59 is assembled into the head assembly portion 58 from the rear side thereof. A rear notch 59a cut out in a semicircular shape is provided at the left and right front end portions of the rear shaft supporting member 59 so that the rear portion of the rotation shaft 26b1 can be rotatably supported. ing. By assembling the rear shaft support member 59 to the head assembly portion 58 with the front portion of the rotation shaft 26b1 supported by both front notches 58a1, the rotation shaft 26b1 of the blower head 20 is attached to the front case 50. It is assembled against. The rear shaft support member 59 is assembled to the head assembly portion 58 in such a manner that it is sandwiched between the rear case 40 and the front case 50 and housed within the main body portion 10 .

The blowing head 20 includes a rear cover 22 provided on the rear side, a front cover 24 provided on the front side, a neck portion 26, a rear impeller 27, and a front impeller 28. The rear cover 22 has a substantially short cylindrical shape with a slightly reduced diameter on the rear side and a bottom. The rear cover 22 is provided with rear grilles 22a and 22b. The front cover 24 has a substantially annular shape. The front cover 24 is provided with a front grill 24a. The neck portion 26 is provided at the lower end of the front cover 24. The rear impeller 27 and the front impeller 28 are housed between the rear cover 22 and the front cover 24.

A substantially circular rear motor accommodating portion 22c in which a rear motor M1 for rotating the rear impeller 27 is housed is provided in the center of the rear cover 22. The rear grilles 22a and 22b are constituted by long rod-shaped frames that extend radially outward in the radial direction from the rear motor accommodating portion 22c. Similarly, a substantially circular front motor accommodating portion 24c is provided in the center of the front cover 24 in which a front motor (not shown) for rotationally driving the front impeller 28 is accommodated. The front grille 24a is constituted by a long bar-shaped frame body extending radially outward in the radial direction from the front motor accommodating portion. Drive power is supplied to the rear motor M1 and the front motor from the circuit board 14 in the main body 10 via the wiring cable 21.

The neck portion 26 of the blower head 20 extends downward from the center of the lower end of the front cover 24 so as to form a substantially T-shape when viewed from the front side. The neck portion 26 has an opposing portion 26a that constitutes a substantially T-shaped horizontal bar portion, and a rotating portion 26b that constitutes a substantially T-shaped vertical bar portion. The left and right sides of the facing portion 26a face both front shaft supports 58a of the front case 50 in the electric fan 1. Approximately rectangular fixing surfaces (not shown) to which cushioning materials 60, which will be described later, are fixed are provided at portions of the opposing portion 26a that face both front shaft supports 58a.

The rotating portion 26b of the neck portion 26 extends downward from the center portion in the left-right direction of the opposing portion 26a in a substantially prismatic shape, and has a substantially circular shape when viewed from the side. The rotating portion 26b is inserted and assembled into the neck insertion portion 58b of the head assembly portion 58. Rotating shafts 26b1 coaxially provided along the left-right direction extend from both left and right side surfaces of the rotating portion 26b, respectively. By holding the rotation shaft 26b1 between the rear notch 59a and the front notch 58a1, the rotation shaft 26b1 is rotatably supported around the axis. In the electric fan 1, the blowing direction can be changed by rotating the blowing head 20 around the rotation shaft 26b1.

Note that a bearing member 29 having an outer diameter one size larger than that of the rotation shaft 26b1 is attached to the outer periphery of one of the rotation shafts 26b1 extending from the left side surface of the rotation portion 26b. One rotation shaft 26b1 is held between the rear notch 59a and the front notch 58a1 while being supported by the bearing member 29 so as to be rotatable. By supporting one rotation shaft 26b1 via the bearing member 29 in this way, the frictional force between one rotation shaft 26b1 and both notches 59a and 58a1 is reduced, and the rotation portion 26b is smoothly rotated. It can be rotated to Note that the rear notch 59a and both front notches 58a1 are different on the left and right, one having a size corresponding to the outer diameter of the rotating shaft 26b1, and the other having a size corresponding to the outer dimension of the bearing member 29.

The cushion material 60 is a substantially rectangular parallelepiped-shaped buffer member, and is made of silicone rubber, for example. The upper surface of the cushioning material 60 is a flat surface, and is fixed to the fixed surface of each facing portion 26a by being attached with double-sided tape or the like. The cushioning material 60 is arranged in a vertically compressed state in the gap between the facing portion 26a and the front shaft support 58a, and presses the facing portion 26a by its elastic return force (that is, the thickness of the cushioning material 60 is , larger than the gap size between the fixed surface of the opposing portion 26a and the front shaft support 58a). Therefore, as the blowing head 20 rotates, the lower surface of the cushion material 60 fixed to the opposing portion 26a comes into sliding contact with the front pivot support 58a.

Here, the electric fan 1 is configured such that by rotating the blowing head 20 around the rotation axis 26b1, the blowing flow path is in an initial state along the front-rear direction, and the blowing head 20 is moved forward approximately 100 degrees from the initial state. The tilt angle of the blower head 20 can be adjusted between the tilted state and the tilted state. That is, in the initial state, the rear surface of the rotating part 26b comes into contact with the front end of the protruding wall part 41 of the rear case 40, and the rearward rotation of the rotating part 26b is restricted. The front surface of the portion 26b comes into contact with the lower surface of the neck insertion portion 58b of the front case 50, thereby restricting forward rotation of the rotating portion 26b. Note that as the blower head 20 rotates, each cushion material 60 presses the front pivot portion 58a of the main body portion 10 while slidingly contacting the front pivot portion 58a, so that the blower head 20 can be held at an arbitrary tilt angle. I can do it.

The carabiner section 30 has a mooring section 32 and a mounting section 34 that is attached to the main body section 10 . The carabiner section 30 is made of, for example, fiber-reinforced plastic. The mooring portion 32 includes a frame 32a that is substantially C-shaped when viewed from the front side, and a substantially cylindrical gate 32b that is openably and closably connected to one end of the frame 32a. A screw fixing part 32a1 that is screwed to the front case 50 is provided on the upper part of the frame 32a. The screw fixing portion 32a1 is provided with two screw holes, and its lower end surface has a shape that follows the shape of the lower surface of the main body portion 10. A portion of the frame 32a below the screw fixing portion 32a1 is exposed to the lower side of the main body 10 from the lower end of the main body 10.

The attachment portion 34 extends upward from the upper right side of the frame 32a in a substantially plate shape. The mounting portion 34 is provided with a screw hole for screwing onto the front case 50. The carabiner part 30 becomes annular by closing the gate 32b, and an object to be moored can be moored within the space formed within the frame 32a. A part of the upper part of the frame 32a and the left side part of the mounting part 34 are curved along the outer peripheral surface of the battery 16 so as not to interfere with the battery 16 when the battery 16 is housed in the main body part 10. It has a concave shape.

Next, the configuration around the switch 12 will be explained in detail. As shown in FIG. 3, a movable piece 15 is disposed between the switch 12 and the circuit board 14 for opening and closing a switch mechanism (not shown) provided on the circuit board 14. When the switch 12 is pressed down from the front side, the protruding part 12a1 (see FIG. 4) provided on the rear surface of the switch 12 comes into contact with the movable piece 15, and the movable piece 15 moves to the rear side (switch mechanism side), and the switch is closed. The mechanism is opened and closed. As a result, the switch 12 is turned on and off. When the switch 12 is not pressed down, the switch 12 is separated from the movable piece 15 (circuit board 14).

As shown in FIGS. 3 and 4, the switch 12 includes a receiving section 12a and a pressing section 13 extending from the receiving section 12a. The switch 12 is provided entirely by integral molding. The receiving section 12a has a substantially disk shape, and moves toward the rear (in the pressing direction) upon receiving a pressing operation from the front side. A protruding portion 12a1 that protrudes rearward in a positive shape is provided on the rear surface of the receiving portion 12a. Furthermore, an engagement piece 12a2 that slightly protrudes laterally is provided on a part of the side surface of the receiving portion 12a.

On the other hand, in the opening of the front case 50, a step-shaped fitting part 50a is provided along the opening end of the switch opening 56, into which the edge of the receiving part 12a is fitted. By fitting the receiving portion 12a into the fitting portion 50a, the front surface of the receiving portion 12a is exposed from the switch opening 56 to the front side. A part of the fitting portion 50a is provided with an engagement recess 50a1 into which the engagement piece 12a2 of the receiving portion 12a is engaged. By engaging the engagement piece 12a2 with the engagement recess 50a1, rotation of the substantially disc-shaped receiving portion 12a is restricted. Furthermore, a case wall portion 50b is provided around the fitting portion 50a, surrounding the receiving portion 12a fitted into the fitting portion 50a, and standing up in the shape of a wall toward the rear (in the pressing direction). The case wall portion 50b is provided in a substantially circular shape when viewed from the rear side along the outer periphery of the receiving portion 12a (see FIG. 5).

As shown in FIGS. 3 to 5, the pressing portion 13 of the switch 12 is flexible and includes an arm 13a and two protrusions 13b. The arm 13a is an elastic piece, and extends counterclockwise along the outside of the case wall 50b from the lower center of the side surface of the receiving section 12a. The arm 13a has a substantially arc shape and extends to a position where the circumferential angle thereof is approximately 90 degrees, and the case wall portion 50b is sandwiched between the arm 13a and the receiving portion 12a.

The two protrusions 13b provided on the arm 13a are provided so as to protrude from the inner surface of the arm 13a toward the case wall 50b in a manner that is spaced apart from each other. One protrusion 13b is provided at the distal end of the arm 13a, and the other protrusion 13b is provided approximately midway between the distal end and the proximal end of the arm 13a. The tip of each protrusion 13b is in contact with the case wall 50b, and is pressed against the case wall 50b by the elastic force of the arm 13a. Note that the portion of the case wall portion 50b that faces the arm 13a is raised higher than the other portions of the case wall portion 50b so that the tip of each protrusion 13b comes into contact with it.

Each protrusion 13b presses the case wall portion 50b in the radial direction of the approximately disk-shaped receiving portion 12a. In other words, each protrusion 13b presses the case wall portion 50b in a direction perpendicular to the direction in which the switch 12 is pressed (backward). Therefore, the receiving portion 12a is held in the radial direction while being movable in the pressing direction while being fitted into the fitting portion 50a. That is, the switch 12 is held in the front case 50 in a state where it can be pressed backward.

As explained above, the electric fan 1 according to the present embodiment is a portable electric fan 1, and includes a main body 10, a blower head 20 having a rear impeller 27 and a front impeller 28, and a blower head 20 provided on the main body 10 so as to be pushable. The switch 12 is provided with a The switch 12 has a pressing portion 13 that presses the main body portion 10 in a direction intersecting the pressing direction.

With this configuration, the electric fan 1 according to the present embodiment is held in the main body 10 in a state in which the switch 12 can be pressed in the depressing direction, and when the electric fan 1 is in the on state, the rear impeller is Even if vibration occurs due to the rotation of the front impeller 27 and the front impeller 28, it is possible to prevent or suppress the switch 12 from shaking. Therefore, it is possible to prevent or suppress the occurrence of abnormal noise due to rattling of the switch 12.

Further, in the electric fan 1, the pressing portion 13 presses the main body portion 10 in a direction perpendicular to the pressing direction. Thereby, the switch 12 is effectively held in the main body 10 in a state where it can be pressed in the pressing direction. Therefore, generation of abnormal noise due to rattling of the switch 12 can be effectively prevented or suppressed.

Further, in the electric fan 1, the switch 12 has a reception part 12a that receives a pressing operation and moves in the pressing direction, and the front case 50 of the main body part 10 is a case that surrounds the reception part 12a inside and rises in the pressing direction. It has a wall portion 50b. The pressing portion 13 extends from the receiving portion 12a to the outside of the case wall portion 50b, and presses the case wall portion 50b from the outside. As a result, while the receiving part 12a surrounded by the inside of the case wall 50b can be pushed down in the pressing direction, the receiving part 12a is pushed into the case when the pressing part 13 presses the case wall 50b on the outside of the case wall 50b. It is held by the wall portion 50b. In this way, it is possible to provide a specific configuration for holding the switch 12 in the main body 10 in a state where it can be pressed in the pressing direction.

Moreover, in the electric fan 1, the pressing part 13 has an arm 13a extending from the receiving part 12a, and a protrusion 13b that projects from the arm 13a and presses the case wall part 50b. Thereby, the projection 13b can press the case wall 50b using the elasticity of the arm 13a extending from the receiving part 12a, so that the pressing part 13 can effectively press the case wall 50b. Therefore, the holding force of the switch 12 to the main body part 10 by the pressing part 13 can be increased.

Moreover, in the electric fan 1, two protrusions 13b are provided on the arm 13a. As a result, the pressing force of the pressing part 13 on the case wall 50b can be increased compared to a configuration in which the arm is provided with one protrusion, and the holding force of the pressing part 13 to hold the switch 12 on the main body 10 can be increased. be able to.

Furthermore, the electric fan 1 according to the present embodiment has a configuration in which the switch 12 is held by the main body 10 by a part of the switch 12 pressing a part of the main body 10. The parts around the switch 12 can be easily assembled and disassembled compared to a structure in which the switch 12 is fixed by fusion bonding or the like.

Further, in the electric fan 1 according to the present embodiment, the switch 12 is spaced apart from the circuit board 14 when the switch 12 is not pressed. Therefore, it is possible to prevent heat generated from the circuit board 14 from being transmitted to the pressing part 13 of the switch 12, and thermal deformation of the pressing part 13 due to the heat of the circuit board 14 can be prevented.

(Second embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG. The electric fan according to the second embodiment is different from the first embodiment in the configuration of the pressing portion 112b of the switch 112. Since the other configurations are the same as those in the first embodiment, their explanation will be omitted. As shown in FIG. 6, in the electric fan switch 112 according to the second embodiment, arms 113a1 and 113a2 extend from the lower center of the side surface of the receiving part 112a and extend in two directions. That is, the switch 112 has two arms 113a1 and 113a2.

One arm 113a1 has the same configuration as the arm 13a according to the first embodiment, and extends counterclockwise along the outside of the case wall 50b. The other arm 113a2 extends clockwise along the outside of the case wall 50b. The other arm 113a2, like the one arm 113a1, has a substantially arc shape and extends to a position where its circumferential angle is approximately 90 degrees, and has a case wall portion 50b between it and the receiving portion 112a. It's stuck. Further, the other arm 113a2, like the one arm 113a1, has two protrusions 113b that press against the case wall 50b. In this embodiment, the configuration of the engagement piece 112a2 provided on the switch 112 and the engagement recess 150a1 provided on the front case 150 are different from that of the first embodiment so that they do not interfere with the other arm 113a2. It is located slightly offset clockwise.

The electric fan according to the present embodiment has a configuration in which the two arms 113a1 and 113a2 extend from the reception section 112a as described above, so that the case wall 50b by the pressing section 113 is different from the configuration of the first embodiment. The pressing force can be increased. The holding power of the switch 112 to the main body part 10 by the pressing part 113 can be further increased.

Note that the embodiments described above are presented as examples, and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included within the scope and gist of the invention, as well as within the scope of the invention described in the claims and its equivalents.

Reference Signs List 1 Electric fan 10 Main body 12 Switch 12a Receiving portion 12a1 Projection 12a2 Engagement piece 13 Pressing portion 13a Arm 13b Projection 14 Circuit board 15 Movable piece 16 Battery 18 Separation plate 20 Blower head 21 Wiring cable 22 Rear cover 22a Rear grill 22b Rear grill 22c Rear motor accommodating part 24 Front cover 24a Front grill 24c Front motor accommodating part 26 Neck part 26a Opposing part 26b Rotating part 26b1 Rotating shaft 27 Rear impeller 28 Front impeller 29 Bearing member 30 Carabiner part 32 Anchoring part 32a Frame 32a1 Screw stopper part 32b Gate 34 Mounting part 40 Rear case 41 Projecting wall part 42 Engaging claw 43 Fitting convex part 44 Rear housing part 50 Front case 50a Fitting part 50a1 Engaging recess 50b Case wall part 52 Engaged claw 53 Fitting recess 54 Front accommodating part 56 Switch opening 58 Head assembly part 58a Front shaft support 58a1 Front notch 58b Neck insertion part 59 Rear support member 59a Rear notch 60 Cushion material 112 Switch 112a Receiving part 112a1 Projecting part 112a2 Engagement piece 113 Pressing part 113a1 Arm 113a2 Arm 113b Projection 150 Front case 150a1 Engagement recess 150b Case wall M1 Rear motor

Claims (6)

It is a portable electric fan,
The main body and
a blower head having an impeller;
a push-down member provided in the main body so as to be pushable;
The pressing member has flexibility and a pressing portion that presses the main body in a direction intersecting the pressing direction.
An electric fan characterized by: The electric fan according to claim 1, wherein the pressing portion presses the main body portion in a direction perpendicular to the pressing direction. The pressing member has a receiving part that receives a pressing operation and moves in the pressing direction,
The main body part has a wall part that surrounds the reception part inside and rises in the pressing direction,
The pressing portion extends from the receiving portion to the outside of the wall and presses the wall from the outside.
The electric fan according to claim 1 or 2, characterized in that: The electric fan according to claim 3, wherein the pressing part has an arm extending from the receiving part, and a protrusion that projects from the arm and presses the wall part. The electric fan according to claim 4, wherein the arm is provided with a plurality of the protrusions. The electric fan according to claim 4 or 5, wherein a plurality of the arms extend from the receiving section.

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