KR100275317B1 - Electric fan having rotating blades with easily adjustable angle - Google Patents

Abstract

PURPOSE: An electric fan having rotating blades is provided to shut off foreign substances of the air being introduced from outside by allowing the angle shift for the rotating blade to be easily performed. CONSTITUTION: An electric fan comprises a rotating blade(110) having a cam shaft(111) arranged along the outer periphery of a circular member(120) and inserted into the circular member; a cam plate(130) having a cam hole(131) with a tilt angle; a plurality of variable arms(140,140a) arranged at the front surface of the circular member; a power connector(150) having symmetrical protrusions(151), and which is coupled to the center of the variable arm; and an elastic spring interposed between a cam pin(160) and a support piece(161) formed at a side of the cam pin, in such a manner that the elastic spring is compressed or extended by the swirling motion of the variable arm.

Description

Ventilator for easy angle displacement

1 is a front state cross-sectional view showing a conventional blower blade for angular displacement of a conventional fan.

Figure 2 is an exploded perspective view showing the configuration of the rotary blade of the present invention.

3 is a perspective view of the coupling state of FIG.

(a) is a state in which the rotor blade is displaced at an angle for the ventilation action,

(b) is a state in which the rotor blade at the time of stopped ventilation operation | work was closed.

4 is an enlarged view showing an operating state of the present invention,

(a) is the frontal state with the variable arm spread out,

(b) shows the back state rotated according to the operation of A.

5 is a side cross-sectional view taken along the line A-A 'of FIG. 3 (b).

* Explanation of symbols for main parts of the drawings

110: rotary blade 111: camshaft

120: between the circles 121,121a: groove portion

130: cam plate 131: cam hole

132: coupling hole 140,140a: variable arm

141: engaging portion 142: elastic spring

150: power connector 160: cam pin

The present invention relates to a ventilator, in particular, by the rotational torque method of the cam motor during the operation and stop of the ventilator variably implements the angular displacement of the rotor blades by acting to open and close the blow function and from the outside The present invention relates to a fan for easily angular displacement of a rotary blade that facilitates blocking foreign substances in the air.

The so-called ventilator refers to a function of indoor air purification by forcibly discharging indoor polluted and muddy air to the outside, and is mainly fixed to the indoor and outdoor barrier walls.

Such a ventilator is provided to allow the indoor and outdoor communication on the blocking wall, so that it is necessary to prevent the inflow of outdoor air and scattered foreign matters during non-operation.

As is well known, the rotor blades of the fan are already formed at the cam motor of the casing while being fixed at a certain angle, as in the rotor blades of the fan. Unnecessary outside air is introduced through the part, and the provision of appropriate measures to block the space part should be considered.

Conventionally, in order to solve such a problem, a cover or a slide folding horizontal door was installed to play a role of a barrier when not in use, but the work is cumbersome and a separate kinematic installation structure is required. Will be.

Korea Utility Model Publication No. 87-2514 has been proposed to solve this problem. 1 is a front state cross-sectional view showing the proposed angular displacement blower blade.

The proposed design is a ventilator 10 having an angular displacement blower blade, and when the ventilator is not operated, the blower blades 11 which are adjacent to each other are in close contact with each other and the air passage is closed. Constantly displaced to have a pitch angle, so that the air passage in the casing is opened so that the pitch of the wing is variably adjusted according to the rotational speed of the fan motor to blow the air in the room.

That is, the projection pin protruding from the rotary link 12 of the blower blade 11 is inserted into the connecting groove 15 of the rotary disk 14 rotated by the fan motor 13 so that the rotary link 12 is rotated. At the same time, the blowing blades 11 can be displaced at a constant angle, which is the two centrifugal weights 16 (2) installed in the above-described rotary disk 14 which can be uniformly opened by the centrifugal force generated by the rotation. 16a) can be achieved by the rotation disk 14 is inclined along each displacement groove (14a), the centrifugal weight (16) (16a) is opened by elasticity when the power short of the fan motor (13) It is to restore the air passage in the casing by the opposite action when the blown wing 11 at the time of power supply is restored by being restored.

Therefore, the above-described design makes it possible to achieve the blowing action and the prevention of foreign foreign matter inflow by adjusting the angle of the blowing blades 11, but the centrifugal weights 16 and 16a installed elastically by depending on the centrifugal force of the displacement of the wing too much. Sufficient fan motor 13 is to be rotated in order to open. That is, the preliminary driving is required for the blowing operation so that the loss in time is inevitable, and the rotational force of the fan motor 13 is increased to overcome the support elasticity (clamped spring) of the centrifugal weight 16 (16a). Of course it is necessary.

The present invention has been proposed to effectively solve the problems included in the preceding advance, and the blade displacement and restoring force of the rotor blades by the axis of rotation of the fan motor to be immediately out of the dependence of the centrifugal force to enable the gain and motor in time It is given the purpose of making it possible to reduce the capacity.

Means of the present invention for achieving the above object is provided as follows.

A rotary blade provided on the outer circumferential edge of the circle in a crank form and pivoted freely; A cam plate in which the cam shaft is fitted and a cam hole having an inclination angle is formed in a circular space; A plurality of variable arms formed on a front face between the circles to form engaging portions symmetrically arranged to be axially rotated; A power connector having a symmetrical projection at the center of the variable arm; A cam pin through which a center portion of the cam hole and the variable arm are interleaved; Between the cam pin and the support provided on one side is characterized in that it is composed of an elastic spring is placed so that the compression and expansion in accordance with the axial rotation of the variable arm.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

2 is an exploded perspective view showing the configuration of the rotary blade of the present invention,

3 (a) and 3 (b) are combined state perspective views showing the rotor blades at the time of the ventilation operation and the stop,

4 (a) and 4 (b) is an enlarged view of the operating state,

FIG. 5 is a cross-sectional view of FIG. 3 (b).

The overall shape of the ventilator may be largely divided into a fan motor 101 fixedly installed at the center portion of the casing 100, and a rotary blade 110 that may be rotated and rotated in the fan motor 101.

On the outer circumference of the circular section 120 on which the rotary blades 110 are to be formed, grooves 121 and 121a formed in two stages can be formed so as to correspond to the number of installations of the rotary blades 110. The recessed groove 112 formed at the outer circumference of the cam shaft 111 can be fitted, but the bent end portion of the crank-type cam shaft 111 is formed at the coupling hole 132 formed at the outer circumference of the cam plate 130. As shown in FIG. 4 (b) of the accompanying drawings.

On the front side of the circular section 120, that is, each of the inner side of the variable arms 140, 140a is provided with a jaw 122 having a lower limit line is set so that the above-described variable arms 140, 140a can be covered. It is.

Thereafter, the circular rod 120 assembled to the rotary shaft 102 of the fan motor 101 is closely inserted into the rotary shaft 102 protruding from the center portion of both variable arms 140 and 140a. ) Is fitted so that the same rotation and the symmetrical projections 151 protruding at both ends of the left and right can be caught while being rotated by the engaging portion 141 formed at the tip of the variable arms 140, 140a. will be. In the normal (non-operational) state of the variable arms 140 and 140a, an extended elastic spring 142 is inserted into the cam hole 131 and is closely located between the fixed cam pin 160 and the support portion 161 to be inward. It is in a reduced state, and thus, the power connector 150 is positioned away from the locking portion 141, so that the shape of the rotary blade 110 in this state is in the closed state as shown in FIG. 3 (b).

Such operation and effect of the present invention will be described in detail mainly with reference to the attached drawings 4 (a) and 4 (b).

First, when the power is applied to the fan motor 101, the power connector 150 connected to the rotating shaft 102 is rotated by 90 ° so that the elastic spring 142 of the variable arms 140 and 140a of which the protrusion 151 is reduced. To overcome and push the locking portion 141 to give a change in position, and thus, the cam pin 160 inserted into the variable arms 140 and 140a is fixed on the circular rod 120 and the cam plate 130. The cam plate 130 moves about 30 ° in the opposite direction to the rotation of the fan motor 101 while moving along the cam hole 131 installed at an angle. At the same time, the cam shaft 111 installed on the cam plate 130 rotates by riding the grooves 121 and 121a of the circular rod 120 by 30 °, which is the rotational amount of the cam plate 130, and thus the cam shaft 111 Rotating blade 110 configured integrally with the) can be opened by each rotation (30 °) can be responsible for the function of the blowing function.

As such, the present invention generates the displacement of the rotary blade 110 by the rotation torque of the power connector 150, so that the displacement generation speed of the rotary blade 110 is about 1/80 second when the speed is 2000 rpm. Concurrent drive by using the rotational force and the conventional angle displacement ventilator to drive the rotary link horizontally in the present invention is configured vertically, in particular to implement an integrated simultaneous assembly to facilitate assembly and disassembly work It has characteristics.

Claims (2)

A rotary blade provided on the outer circumferential edge of the circle in a crank form and pivoted freely; A cam plate in which the cam shaft is fitted and a cam hole having an inclination angle is formed in a circular space; A fan having a plurality of variable arms having a plurality of variable arms formed thereon in a symmetrical manner so as to be pivotable on a front surface between the circles; a power connector having a symmetrical projection at the center of the variable arm; Ventilating easy to angular displacement of the rotor blades, characterized in that between the cam pin and the support provided on one side is provided by providing an elastic spring so that the compression and expansion in accordance with the axis pivot of the variable arm. The angular displacement of the rotary blade according to claim 1, wherein the outer edge of the cam plate 130 forms a coupling hole 132 to allow the front end portion of the cam shaft 111 to flow. Easy ventilator.