JP3258987B2 - Fan - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric fan capable of separating a stand into a base and a column.

[0002]

2. Description of the Related Art Conventionally, as a fan capable of separating a stand into a base and a support, for example, Japanese Utility Model Publication No. 57-58478 (F
16M 11/20) and the like are known. In this fan, a column support is recessed on the upper surface of the base, a support at the lower end of the column is inserted into the column support, and a screw is inserted into a screw hole of the column through a hole formed in the base rear from the base rear side. The first terminal provided on the base and the second terminal provided on the support are connected in a state where the base and the support are integrated, and the base and the support are integrated. It is configured to supply power to the electric motor.

However, since the base and the support can be used even in an unstable state in which the support is fixed by screws, there is a possibility that the support may be damaged due to a fall or the like.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks, and can prevent erroneous use in an unstable state in which a base and a support have been forgotten to be fixed, thereby improving safety. It is an object to provide a fan that can perform the operation.

[0005]

Means for solving the above problems include a base, a support provided on the base and penetrating the base from the upper surface to the lower surface, and a support supported by the support. A support having a portion, a slide pipe slidably supported in the support, a fan head supported on the slide pipe and having an electric motor, a fan rotationally driven by the electric motor, and a fan A guard body that covers the lower surface of the support portion, is provided at a lower portion of the support portion, protrudes downward from the lower surface of the base through a lower surface opening of the column support portion, and is mounted on the protrusion portion that protrudes from the lower surface of the base. A fixing member for fixing the base and the column by contacting the contact portion with the lower surface of the base in a state of being mounted on the projecting portion, having a contact portion that contacts the lower surface of the base around the projecting portion separated from the projecting portion. To A safety switch is provided which is operated by fixing the base and the support by the fixing member to enable energization of the electric motor, and disconnects the fixing member to cut off the energization of the electric motor. Are arranged to protrude downward from the lower surface of the base facing the contact portion of the fixing member.

[0006] In the means for solving the above problems,
It is preferable that the operation unit of the safety switch is located above the lower end of the base.

[0007]

[0008]

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described in detail below based on a fan 1 shown in the drawings.

Reference numeral 2 denotes a stand for the electric fan 1, and a base 3
It comprises a support column 4 detachably mounted on the base 3, a slide pipe 5 slidably supported by the support column 4, and a neckpiece (not shown) supported on the upper end of the slide pipe 5 so as to be raised. .

[0011] A fan or the like having an electric blower is supported on the neck piece so as to freely swing left and right. Reference numeral 6 denotes a fan detachably mounted on the electric motor, and reference numeral 7 denotes a guard that is detachably mounted on the fan head so as to cover the fan 6.

The base 3 comprises a base 8 made of synthetic resin having an open lower surface, and a metal lid 9 for closing the lower surface of the base 8. Reference numeral 10 denotes a column supporting portion formed at a substantially central portion of the base 3. An annular concave groove 11 is formed on the peripheral edge of the column supporting portion 10 on the upper surface of the base 3, and a substantially annular concave portion is formed on the lower peripheral edge of the column supporting portion 10. A groove 12 is formed. 13
Are positioning projections formed by bulging vertically from the peripheral wall of the support column 10 toward the inside of the support column 10, and are fitted into positioning recesses 33 provided in a support portion 25 of the support column 4 described later. The rotation of the support 4 with respect to the base 3 is performed. Reference numeral 14 denotes an annular engagement groove formed at the lower end of the peripheral wall of the column supporting portion 10 of the base 8, and an annular rising piece of the lid 9 described later.
24 are fitted.

Numeral 15 is a rib formed from the back surface of the base 8 and connecting the peripheral wall of the base 8 to one of the positioning projections 13. The rib 15 defines a storage chamber 17 for storing a power supply line 16 and a power supply line.
16 is supported via a bushing 18, and the rib 15 is formed from the positioning projection 13 so that the positioning projection 13
Has been reinforced. Reference numeral 19 denotes a board fixed to the back surface of the base 8, and has a switch or the like operated by an operation piece 20 provided on the base 8.

Reference numeral 21 denotes a safety switch fixed to a boss (not shown) formed from the back surface of the base 8 and disposed on the other positioning projection 13. The operation switch 22 protrudes from the lid 9 to the back surface. Then, a fixing member 35 is attached to a support 25 described later of the support 4.
Is screwed into the first terminal
23 can be supplied with electricity. Since the operation part 22 of the safety switch 21 is located above the lower end of the peripheral wall of the base 3 and above the lower end of the support part 25 of the support 4, the base 3 is placed on the floor with the fixing member 35 removed. Even if it is placed on a surface or the like, the operation unit 22 is not operated. twenty three
Is a first terminal disposed below the support column 10, and is supplied with power from the substrate 19.

A substantially ring-shaped rising piece 24 is formed by pressing on the periphery of an opening forming the column supporting portion 10 of the lid 9 by pressing, and the rising piece 24 is attached to the base 8.
The supporting column 10 is fitted into an engaging groove 14 provided at the lower end of the peripheral wall.

Reference numeral 25 denotes a support portion formed at the lower portion of the support column 4. The support portion 25 includes a base portion 26 formed integrally with the support column 4, and a screw portion 27 fixed to the base portion 26 and to which a fixing member 35 described later is screwed. And a screw body 28 having the same. Base 26 of the support 25
An annular rib is formed in the upper part of the support part 25 so as to fit into the concave groove 11 on the upper surface of the base 8 from the flange 29 downward.
At the same time, a fitting portion 31 is formed at the lower end of the base 26 of the support portion 25 so as to fit into the concave groove 12 on the lower peripheral edge of the support column 10.

Reference numeral 32 denotes a second terminal provided on the lower surface of the support portion 25, and a first terminal 23 disposed at the lower end of the column support portion 10 is detachably connected to supply power to the electric motor. . Reference numeral 33 denotes a positioning recess formed on the side surface of the base 26 of the support 4 so as to face the positioning protrusion 13 of the support support 10. When the support 25 is inserted into the support 10, the positioning protrusion is formed.
13 is fitted into the positioning recess 33 to position the support portion 25 with respect to the column support portion 10 and to restrict the rotation of the support portion 25. Reference numeral 34 denotes an engagement claw formed in the positioning recess 33 of the screw body 28, and the engagement claw 34 engages with the lower surface of the support column 10 in a state where the support portion 25 is completely inserted into the support column 10. Prop 4
To the base 3 temporarily.

Reference numeral 35 denotes a ring-shaped synthetic resin fixing member for fixing the support 4 to the base 3.
a, an inner peripheral wall 35b, and a bottom wall 35c. A screwing portion 36 is formed on the inner surface of the inner peripheral wall 35b to be screwed into the screwing portion 27 of the support, and an end of the outer peripheral wall 35a facing the bottom wall 35c. Has a base 3
The contact portion 60 that contacts the lower surface is bent. When the screwing portion 36 of the fixing member 35 is screwed to the screwing portion 27 of the column 4, the contact portion 60 of the fixing member 35 comes into contact with the lower surface of the base 3 to fix the column 4 and the base 3. I have. The fixing member 35
Is substantially opposed to the lower part of the peripheral wall of the column supporting portion 10 of the base 3 in a state of being screwed to the threaded portion 27 of the column 4, and the contact portion 60 presses the operating portion 22 of the safety switch 21. ing.

The fixing member 35 is provided with a plurality of reinforcing ribs for connecting the outer peripheral wall and the inner peripheral wall, and one of the reinforcing ribs is formed higher than the other reinforcing ribs. In a state in which the fixing member 35 is screwed to the portion 27, the high reinforcing rib abuts on an extension rib (not shown) extending downward from the lower end of the column support portion 10 to prevent the fixing member 35 from being overtightened.

Next, the circuit will be described with reference to FIG.
Reference numeral 37 denotes a control circuit, which is connected to the first terminal 23 via a step-down circuit 38, and is supplied with a power supply stepped down to a predetermined voltage by the step-down circuit 38. Reference numeral 39 denotes an operation switch circuit having a switch (not shown) mounted on the board 19, and outputs an operation signal of the switch to the control circuit 37. Reference numeral 40 denotes a motor drive circuit that controls the electric motor 41 based on the signal of the control circuit 37, and reference numeral 42 denotes a head that controls a swing motor 43 that swings the fan head in the left and right direction based on the signal of the control circuit 37. This is a vibration motor drive circuit.

In the circuit of this embodiment, the safety switch
Reference numeral 21 denotes a normally open switch provided on one of the power supply lines 16 extending from the plug 44 to the second terminal 32, as shown in FIG.

Next, a method of attaching the support 4 to the base 3 will be described. The support 25 of the support 4 is replaced with the support 10 of the base 3
Then, the positioning projection 13 is fitted into the positioning recess 33 and inserted. During this insertion operation, the positioning projections
13 is fitted, the support 25 rotates and the terminals 23, 32
Is not damaged by force.

The support portion 25 of the support 4 is a support portion of the base 3
When the support 3 is completely mounted, the engagement claws 34 formed on the base 26 of the support 25 engage with the lower surface of the support 10 to temporarily fix the base 3 and the support 4. In order to screw the fixing member 35, it is necessary to invert the support 4 together with the base 3, but since the base 3 and the support 4 are temporarily fixed, the inversion operation must be performed.
In addition to the above, it is possible to prevent the base 3 from falling off during the inversion and during the inversion state, and it is possible to improve the assembling workability.

The base 3 and the support 4 are temporarily fixed and then inverted, and a fixing member 35 is screwed into the screw portion 27 of the support 25 to fix the base 3 and the support 4. The operation portion 22 of the safety switch 21 is pressed by the fixing member 35 by screwing of the fixing member 35, and the terminal
Power can be supplied to the motor via 23 and 32, and the assembly of the base 3 and the support 4 is completed.

Since the fixing member 35 is screwed at a position facing the peripheral wall of the column support 10 and the wall of the column 25, the column support 10 and the column 25 can be firmly tightened. It can be mounted on the base 3 in a stable state without shaking. Further, since the fixing member 35 is screwed to the outer periphery of the support portion 25, the supporting member 35 is more supported than the conventional structure in which the screw of the fixing member is screwed from the lower surface side of the base 3 through the through hole formed in the column support portion. The area of the threaded portion between the portion 25 and the fixing member 35 is increased, so that the support strength of the column 4 can be increased, and the column 4 can be stably supported on the base 3.

The annular rib 30 on the upper part of the support 25 fits into the concave groove 11 on the upper edge of the column support 10 and the fitting part 31 on the lower part of the support 25 is inserted into the concave groove 12 on the lower edge of the column support 10. So that the fixing member 35 is not screwed,
Even if an external force is applied to the column 4 in the lateral direction with the 35 not completely tightened, the annular rib 30 and the concave groove
11 and the fitting between the fitting portion 31 and the concave groove 12
Is supported in a more stable state.

When the base 3 is stepped on by mistake,
The peripheral wall of the support column 10 tries to deform in the inner diameter direction,
The fitting portion 31 of the support portion 25 is fitted into the concave groove 12 below the column support portion 10, and the rising piece 24 of the lid 9 is engaged with the engagement groove 14 of the base 3.
The strength of the column support 10 is improved because
The deformation of the peripheral wall of the support column 10 is prevented.

When the flange 29 of the support 4 is stepped on by mistake, the flange 29 of the support 4 tends to be deformed upward, but the annular rib 30 of the support 25 is not supported. The fitting portion 31 of the support portion 25 fits into the concave groove 11 of the upper peripheral edge of the support portion 10.
Fits into the concave groove 12 in the lower peripheral edge of the support column 10, so that the strength of the lower portion of the support column 4 is improved and deformation of the support column 4 is prevented.

Further, the safety switch 21 is operated by the fixing member 35 by mounting the support 4 on the base 3 and screwing the fixing member 35 to the support portion 25 of the support 4, in other words, the base 3. When the power supply line 16 is inserted into an outlet, the support 4 is removed from the base 3 and no electric shock is caused even if the first terminal 23 is accidentally touched. At the same time, it is possible to prevent erroneous use of the column 4 for which the fixing member 35 has been forgotten to be mounted in an unstable state, thereby preventing safety.

Since the operating portion 22 of the safety switch 21 is located above the lower end of the peripheral wall of the base 3, the base 3 can be placed on a floor or the like with the fixing member 35 removed. In addition, since the operation unit 22 of the safety switch 21 is not operated by the floor or the like, an electric shock accident can be reliably prevented.

In the above-described embodiment, the fixing member 35 is screwed and fixed to the supporting portion 25 of the column 4.
As shown in FIG. 18, a substantially columnar protrusion 45 is formed on substantially opposite side surfaces of the support portion 25, and a substantially L-shape in which the protrusion 45 of the support portion 25 is fitted on the inner surface of the fixing member 35. The engagement groove 46 may be formed. In this configuration, the fixing member 35
Is moved in the axial direction of the column 4 along the engagement groove 46 in a state where the projection 45 is fitted in the engagement groove 46, and further, the fixing member 35 is
It is fixed by rotating along the engagement groove 46 until the projection 46 gets over the engagement protrusion 47 formed at the end of the engagement groove 46.
In this fixed state, the fixing member 35 is
22 is pressed, and the first terminal 23 can be supplied with power.

The engagement groove 46 is, as shown in FIGS.
The horizontal part of the base 3
It is preferable that the base 3 and the column 4 be firmly fixed by the rotation of the fixing member 35. With this configuration, it is possible to reduce the number of rotation operations at the time of attaching and detaching the fixing member 35 as compared with the above-described embodiment, and to improve the attaching and detaching operability.

Further, the support portion 25 of the column 3 and the fixing member 35 may be configured as shown in FIGS. That is, the support
25, a concave groove 48 is formed on the opposite side surface, and the fixing member 35 is formed in an oval shape, and the inner surface thereof is engaged with the concave member 48 along the longitudinal direction of the fixing member 35 by being inserted into the concave groove 48. A configuration in which the rib 49 is formed may be used.

In this configuration, as shown in FIGS. 19 to 21, the support portion 25 is inserted into one end of the fixed member 35 on which the engaging rib 49 is not formed, and the fixed member 35 is moved in the direction of the arrow in FIG. Then, as shown in FIG. 20, the engagement rib 49 is fitted into the concave groove. The engaging rib 49 is inclined so as to gradually approach the base 3 toward the distal end side, and the concave groove 48 is inclined so as to gradually approach the base 3 toward the inserting direction of the engaging rib 49. Since the fixing member 35 slides, the fixing member 35 tightly fixes the base 3 and the support 4 to each other. While forming the projection 50 in the concave groove 48, the engaging rib 49,
Since the concave portion 51 that engages with the projection 50 is formed in a state where the engaging rib 49 is fitted in the concave groove 48, the fixing member 35 does not fall off.

With the fixing member 35 mounted, as shown in FIG. 20, the fixing member 35 operates the safety switch 21 to enable the first terminal 23 to be energized.

[0036]

[0037]

As described above, according to the structure of the first aspect of the present invention, it is possible to conduct electricity only in a state where the base and the support are fixed by the fixing member, so that it is possible to forget to fix the base and the support. It can prevent misuse in a stable state,
Safety can be improved. Further, since the fixing member is configured to be fixed to the support from the lower surface side of the base, the fixing member is not seen in a use state or the like, so that there is an effect that the appearance is not spoiled.

According to the configuration of the second aspect of the present invention, the safety switch is operated by the floor or the like even when the base and the support are placed on the floor or the like in an unstable state where the support member is forgotten to be fixed by the fixing member. Therefore, it is possible to prevent erroneous use in an unstable state where the base and the support are fixed and forget to fix the base and the support, and it is possible to improve the safety.

[0039]

[0040]

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view of a main part in a state where a stand according to an embodiment of the present invention is assembled.

FIG. 2 is an enlarged sectional view of a main part with the fixing member removed.

FIG. 3 is an enlarged sectional view of a main part of a base of the base.

FIG. 4 is a bottom view of a threaded body of the column.

FIG. 5 is a side view of a screwed body of the column.

FIG. 6 is an enlarged sectional view of a main part in a state where the stand is assembled.

FIG. 7 is an enlarged sectional view of a state where the stand is assembled.

FIG. 8 is a bottom view of the stand assembled.

FIG. 9 is an enlarged sectional view showing the disassembled state of the stand.

FIG. 10 is a bottom view of the stand showing a state where the fixing member is removed.

FIG. 11 is a bottom view of the column.

FIG. 12 is a bottom view of a base of the base.

FIG. 13 is a top view of the base.

FIG. 14 is an external perspective view of the electric fan.

FIG. 15 is the same circuit diagram.

FIG. 16 is an enlarged sectional view of a main part showing another embodiment of the present invention.

FIG. 17 is an enlarged sectional view of a main part showing a state where the fixing member is removed.

FIG. 18 is an enlarged sectional view of a main part showing a state where the fixing member is attached.

FIG. 19 is an enlarged bottom view of a main part showing another embodiment of the present invention.

20 is a sectional view taken along the line AA of FIG. 19, showing a state where the fixing member is attached.

FIG. 21 is a sectional view taken along the line AA of FIG. 19, showing a state where the fixing member is removed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fan 2 Stand 3 Base 4 Post 10 Post support section 19 Board 21 Safety switch 22 Operation section 23 Terminal 25 Support section 32 Terminal 35 Fixing member

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F04D 25/08 F16M 11/20

Claims (2)

(57) [Claims] 1. A base, and a base provided on the base.
Support which penetrates from the upper surface to the lower surface, and the support
A support having a support portion supported by
A slide pipe movably supported, and the slide pie
Is supported on the top of the flop, the fan head with a motor, a fan driven in rotation by said electric motor, and a guard member which covers the fan, provided at a lower portion of the support portion, pillar support
Protrudes downward from the lower surface of the base through the lower surface opening of the part
Attached to the protrusion and the protrusion protruding from the lower surface of the base.
The lower surface of the base around the protruding part that is separated from the protruding part
Has a contact part that comes into contact with the
A fixing member for fixing the base and the column by bringing the portion into contact with the lower surface of the base, and being operated by fixing the base and the column with the fixing member, enabling power to be supplied to the electric motor, and A safety switch is provided to shut off the power to the motor upon disconnection .
Operate the operation unit from the lower surface of the base facing the contact part of the fixing member.
A fan characterized by being arranged to protrude downward . 2. The electric fan according to claim 1, wherein an operation portion of the safety switch is located above a lower end of the base.