JPS6145356Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an electric fan in which a wind direction changing plate that rotates due to the wind pressure from the fan is attached to the front of a casing in which a fan is installed.

[Conventional technology]

Conventional electric fans of this type have a housing with an open front housing a fan rotated by a fan motor, and a wind direction changing plate mounted on the front of the housing that rotates due to wind pressure from the fan.
The direction of the air blowing from the fan can be changed continuously according to the rotation of the wind direction changing plate.

By the way, in the above-mentioned electric fan, it is practically necessary not only to rotate the wind direction changing plate by the wind pressure from the fan to change the direction of the wind, but also to stop the rotation of the wind direction changing plate to fix the wind direction. It is required that this type of wind direction changing plate be stopped reliably.

Therefore, conventionally, for example, U.S. patent
As shown in the specification of No. 3481534, some of the blades of the straightening blades provided between the fan and the wind direction changing plate are made rotatable, and a stopper that can freely come into contact with the rear surface of the wind direction changing plate is attached thereto. There is a device that is provided with a protrusion, and the wind direction changing plate is stopped by rotating the blade.

[Problem that the invention attempts to solve]

However, in the above case, when the wind direction change plate stops,
Since the protrusion is pressed against the rear surface of the wind direction change plate and its frictional resistance prevents the wind direction change plate from rotating, the protrusion does not come into contact with the wind direction change plate at all due to variations due to dimensional errors of various parts, so it cannot be used as a stopper. There are disadvantages in that the protrusions may not work, or conversely, the protrusions may hit the wind direction changing plate too strongly and deform the wind direction changing plate.

Therefore, in this invention, the stopper of the wind direction change plate can be brought into contact with the rear surface of the wind direction change plate reliably and without deforming the wind direction change plate, without being affected by variations due to dimensional errors of various parts. The technical challenge is to make this possible.

[Means for solving problems]

This idea is based on a fan in which a fan rotated by a fan motor is housed in a casing with an open front, and a wind direction changing plate is removably attached to the front of the casing, which rotates due to wind pressure from the fan. A concavo-convex engaging part is formed on the outer circumferential rear surface of the casing, and the housing supports a stopper formed of an elastic body, and a position where the stopper contacts the engaging part from the rear face and a position where the stopper separates from the engaging part. This electric fan is equipped with an operating body that is held in place.

[Effect]

Next, the operation of the above means will be explained.
When the stopper is held by the operating body in a position where it abuts the engaging part formed on the outer circumferential rear surface of the wind direction changing plate from the rear surface, the stopper comes into contact with the engaging part with a certain amount of deflection due to its elasticity, so that various Dimensional errors in parts, especially between the stopper and the engaging part, are absorbed by the deflection of the stopper, and the stopper may not contact the engaging part at all, or it may contact the engaging part too strongly and cause this to occur. There is no possibility of deformation, the wind direction changing plate is reliably stopped by the contact force of the stopper, and the direction of the wind from the fan is fixed. Additionally, when the stopper is held in a position where it is removed from the engagement part by the operating body, the wind direction changing plate rotates under the wind pressure from the fan, and the direction of the air blowing from the fan changes continuously according to this rotation. be done.

〔Example〕

Next, this invention will be explained in detail with reference to drawings showing one embodiment thereof.

(Configuration of the embodiment) In the drawing, 1 is the main body of the electric fan and is a housing with an open front.The housing 1 has a motor mounting recess 2 in the center and a storage case 4 for a switch 3 etc. on the top surface. A notch 5 is formed on the lower surface to stably support the housing 1, and an air suction grille 7 is formed on the rear surface and both side surfaces. 8 is a fan motor whose rear half is inserted into the recess 2 and fixed in the housing 1; 9 is a motor support plate with a fitting hole 10 for the motor 8 transparently provided in the center; Recess 2
is fixed by a screw 12 to a boss 11 protruding from the periphery of the motor 8, and the rear half of the motor 8 is fitted into the fitting hole 1 of the support plate 9.
0 and inserted into the recess 2, and the support plate 9 is fitted with a screw 14 to a boss 13 protruding from the circumferential side of the recess 2.
and the flange 15 of the motor 8 are fixed at the same time, and the motor 8 is attached to the housing 1. Reference numeral 16 indicates a fan that is installed inside the housing 1 and is fixed to the rotating shaft 17 of the motor 8 to be rotated. Reference numeral 18 is a back cover that closes the bottom opening of the storage case 4. ) After fixing the back cover 1
8 is installed. 19 is an elastic body fixed to the lower surface of the rear end portion 20 of the leg portion 6 with a screw 21;
When the electric fan is placed on the floor, the elastic body 19 comes into contact with the floor surface. Reference numeral 22 denotes the front end of the leg 6. An engagement hole 23 for engaging and holding a locking tongue protruding from the lower surface of the front frame, which will be described later, is formed on the upper surface of the front end 22. Legs 24 that can be raised freely are pivotally attached to the lower surface, and by raising the legs 24, the center of air blowing of the electric fan can be slightly turned upward. 2
Reference numeral 5 denotes a reinforcing plate attached to the upper part of the back of the recess 2, and a keyhole-shaped wall hanging hole is provided through the reinforcing plate 25 and the back wall, and the rear end face of the rear end 20 of the leg 6 and The rear surface of the back wall of the recessed part 2 is formed on the same plane, and the fan can also be used as a wall hanging by inserting the head of a screw screwed into the wall into the wall hanging hole.

Reference numeral 26 denotes a front frame detachably attached to the front surface of the casing 1, and the engagement tongue piece 27 on the lower surface of the front frame 26 is engaged with the engagement hole 23 and held. 28 is a wind tunnel formed inside the front frame 26 for efficiently sending air from the fan 16; 29 is a concave mounting part supported by a support piece 30 from the wind tunnel 28 in the center of the wind tunnel 28; 26, the wind tunnel 28, the mounting portion 29, and the support piece 30 are integrally molded. 31
is a gear box fixed to the mounting part 29 with screws 32; the outer side of the gear box 31 consists of a box body 33 and a lid 34, and is sealed with a ring-shaped packing 35; The lid body 3
A gear mechanism 37 is provided which interlocks with the rotating shaft 36 protruding from the rotating shaft 4 and slows down the rotation of the rotating shaft 36. This gear mechanism 37 includes a first gear 38 that rotates integrally around a rotating shaft 36, a first connecting gear 39 that meshes with the gear 38, and a first connecting gear 39 that has the same axis as the first connecting gear 39. A rotating second gear 40, a second connecting gear (not shown) that meshes with the second gear 40, and a blade (not shown) that rotates integrally with the second connecting gear on the same rotation axis. ), and the blade is formed by cutting and raising a part of a disc into a triangular shape. In addition, these gears 38, 3
The rotating shafts 9 and 40 are supported by support plates 41 and 42, and a liquid such as oil having a certain degree of viscosity is sealed in the gear box 31. Gear and first connecting gear 39
The lower half of the second gear 40 and the lower half of the first gear 38 are immersed.

Reference numeral 43 denotes a wind direction changing plate that is detachably attached to the front surface of the front frame 26 and rotates by the wind pressure from the fan 16. A rectifying blade 44 extending in the radial direction is provided in the center, and a wind direction changing plate 43 is installed on the outside of the rectifying blade 44 to change the direction of the wind. An inclined change blade 45 is provided to change the direction of air blowing,
The change wing 45 is formed such that the inclination increases from the wing 45a on one side toward the wing 45b on the other side. 46 is a pin implanted in the rotating shaft 36, 47 is a clutch plate engaged with the pin 46 inserted into the rotating shaft 36, and 48 is the rotating shaft 36.
The connecting tool 49 inserted into the connecting tool 48 is a concave and convex portion formed on the rear inner surface of the connecting tool 48, and engages with an elastic pawl formed on the outer periphery of the clutch plate 47. 50
A retaining ring is fitted into an annular groove (not shown) formed at the tip of the rotating shaft 36, and prevents the connector 48 from coming off the rotating shaft 36.
Reference numeral 51 denotes a spinner fitted to the connecting tool 48 to fix the wind direction changing plate 43 fitted to the connecting tool 48, and 52 denotes an uneven engagement formed on the rear surface of the outer periphery of the wind direction changing plate 43. It is a joint.

53 is an operating body provided on the inner surface of the upper part of the front frame 26 so as to be movable back and forth; 54 is a plate-shaped stopper made of an elastic body that is integrally formed and hangs down from the front part of the operating member 53; Two protrusions 55 are formed on the front surface of the wind direction changing plate 43 to abut and fit into the engaging portion 52 of the wind direction changing plate 43. is located on the rear surface of the wind direction changing plate 43, and the operating body 5
3, the stopper 54 can freely come into contact with the engaging portion 52 from the rear surface. 57 is the operating body 53
58 is a boss integrally formed on the inner surface of the upper front wall of the front frame 26, 59 is a screw that is screwed into the boss 58 through the through hole of the holder 57 to fix the holder 57, and 60 is an operating body. 53 is an operating rod protruding from the upper surface and led out from the guide hole 61 on the upper surface of the front frame 26, 62 is an operating knob attached to the operating rod 60, and 63 is a clutch transparently provided in the operating body 53 in the left and right direction. 64 is a spring installed in the clutch hole 63, 65 is a clutch ball provided at both ends of the spring 64 and biased outwardly to the left and right, 66 and 67 are formed at the front and rear of the left and right walls of the holder 57. The clutch ball 65 selectively fits into the engagement holes 66 and 67, and the operating body 53 is positioned forward and backward, and the stopper 54 does not come into contact with the engagement portion 52 at the position where it comes into contact with it. held in position.

(Operation of example) Next, the operation of the above embodiment will be explained.

First, as shown in FIG. 6, the operating knob 62 is operated rearward, the operating body 53 is moved rearward, and the stopper 54 is held at a position where it does not come into contact with the engaging portion 52. In this case, when the fan motor 8 is driven to rotate the fan 16, the wind direction changing plate 43 is rotated by the wind pressure from the fan 16, the wind direction is changed in accordance with the rotation of the wind direction changing plate 43, and the wind is blown over a wide range. be done.

At this time, the wind direction changing plate 43 tries to rotate at high speed in synchronization with the rotation of the fan 16, and the gear mechanism 37
The gears 38, 39, 40 and the blades also try to rotate at high speed, but the liquid sealed in the gear box 31 acts as a resistance to the gears trying to rotate at high speed, causing the gears 38, 39, 40 and the blades to rotate at high speed. Since the wind direction changing plate 43 is braked, the wind direction changing plate 43 is decelerated and rotated at a low speed.

On the other hand, as shown in FIG. 7, when the operating knob 62 is operated forward and the operating body 53 is moved forward to hold the stopper 54 in a position where it abuts the engaging portion 52, the protrusion 55 of the stopper 54 engages. It fits into the joint 52, and the rotation of the wind direction changing plate 43 is stopped.

When the wind direction changing plate 43 is rotated by hand in the stopped state of the wind direction changing plate 43, the wind direction changing plate 43
Since the stopper 54 that is in contact with the wind direction change plate 43 is elastically in contact with the wind direction change plate 43, the stopper 54 is bent back and forth, and the wind direction change plate 43 is rotated without being damaged in any way, and the wind direction change plate 43 is stopped at an arbitrary position. be able to.

[Effect of idea]

As described above, according to the electric fan of this invention, since the elastic stopper can be brought into contact with the engagement part of the wind direction changing plate from the rear surface, the electric fan is not affected by variations due to dimensional errors of various parts, etc. The wind direction changing plate can be stopped reliably and without deformation by the stopper, and the wind direction changing plate can be reliably stopped by operating the operating body.

[Brief explanation of the drawing]

The drawings show one embodiment of the electric fan of this invention, in which Fig. 1 is a perspective view, Fig. 2 is a cut-away side view, Fig. 3 is a cut-away side view with the front frame removed, and Fig. 4 shows the installation of the stopper. FIG. 5 is a perspective view of a part of the wind direction changing plate, FIGS. 6 and 7 are enlarged cutaway side views of the main parts, and FIG. 6 shows the wind direction changing plate in a rotatable state; FIG. 7 shows the wind direction changing plate in a stopped state. DESCRIPTION OF SYMBOLS 1... Housing, 8... Fan motor, 16... Fan, 43... Wind direction change plate, 52... Engaging portion, 5
4... Stoppa.

Claims (1)

[Scope of utility model registration request] In an electric fan, a fan rotated by a fan motor is housed in a casing with an open front, and a wind direction changing plate which is rotated by wind pressure from the fan is detachably attached to the front of the casing. A concavo-convex engaging portion is formed on the rear surface of the outer periphery, and the housing supports a stopper formed of an elastic body, and the stopper is moved to a position where it abuts the engaging portion from the rear surface and a position where the stopper is moved away from the engaging portion. An electric fan equipped with an operating body that is held in position.