CN109219702B

CN109219702B - Electric fan

Info

Publication number: CN109219702B
Application number: CN201680085681.3A
Authority: CN
Inventors: 安田雄一; 安田芳彦
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2016-06-10
Filing date: 2016-06-10
Publication date: 2020-05-05
Anticipated expiration: 2036-06-10
Also published as: KR20180123154A; TWI645118B; JP6548826B2; WO2017212649A1; CN109219702A; JPWO2017212649A1; TW201742988A; KR102053048B1

Abstract

The fan is provided with a screw hole (108) for mounting a buckle fixing screw (7) on a shield ring (100), and a locking buckle (300) is provided with: a screw through-portion provided with a long hole (308), and through which a snap fixing screw (7) attached to the screw hole (108) passes through the long hole (308); and a hook portion (303) that engages with the shield ring (100) when the buckle fixing screw (7) is disposed on the side of one end (308a) of the elongated hole (308), and that disengages from the shield ring (100) when the buckle fixing screw (7) is disposed on the side of the other end (308b) of the elongated hole (308).

Description

Electric fan

Technical Field

The present invention relates to an electric fan having a fan shroud that is easily disassembled and prevents accidental detachment.

Background

A conventional electric fan includes a stage portion, a rotating portion supported by the stage portion and having a motor for driving blades, blades driven by the motor, and a shroud surrounding the periphery of the fan, as disclosed in patent document 1, wherein the shroud is divided into a structure capable of contacting the blades, coupling of the divided shrouds is achieved by an engaging portion provided on an annular member on a circumferential surface of the shroud with respect to a rotating shaft, and a lock catch for suppressing movement of the shroud in a disassembly direction is provided to prevent the engaging portion from being unintentionally disengaged by vibration or impact.

The lock catch is rotatably supported by the annular member, and the hook portion provided on the lock catch is locked to the annular member or the shield to complete the locking. The engagement and release of the lock catch are performed by a user applying a load to the handle of the lock catch, and there is an advantage that there is no trouble of detaching the screw and the screw is not lost, as compared with a structure in which the shield is directly fixed by the screw.

Prior art documents

Patent document

Patent document 1: utility model registration No. 3195289

Disclosure of Invention

Problems to be solved by the invention

The lock buckle needs to avoid the situation that the lock buckle is disengaged due to the peeling or accidental contact of children or pets due to the action of the lock buckle, but the structure of engaging and disengaging the lock buckle by applying load has the following problems: in order to function, it is difficult for users who are weak, such as elderly people, to operate, and the operating load varies due to variations in component dimensions or aged deformation. Further, since the handle of the lock catch protrudes to easily apply a load, there is a problem that the handle may catch clothes inadvertently.

The present invention has been made in view of the above problems, and an object of the present invention is to obtain an electric fan with a lock catch, which is less likely to cause an erroneous operation and which reduces an operation load.

Means for solving the problems

In order to solve the above problems, an electric fan according to the present invention includes: a rotating part having a motor built therein; a blade driven by the motor; a shroud that has a shroud rear portion fixed to the rotating portion, a shroud front portion covering the blades from a side opposite to the motor, and a shroud ring connecting the shroud rear portion and the shroud front portion, and that is dividable in the axial direction of the motor; a locking catch that prevents the shield front from disengaging from the shield ring; and a buckle fixing screw which supports the locking buckle shaft to the shield ring, wherein the shield ring is provided with a threaded hole for mounting the buckle fixing screw. The lock buckle is provided with: a screw through-portion provided with a long hole through which a fastening fixing screw attached to the screw hole passes; and a hook portion that engages with the shield ring when the snap fixing screw is disposed on one end side of the long hole, and releases the engagement with the shield ring when the snap fixing screw is disposed on the other end side of the long hole.

ADVANTAGEOUS EFFECTS OF INVENTION

The electric fan according to the present invention has an effect that it is difficult to cause an erroneous operation of the lock catch and the operation load of the lock catch can be reduced.

Drawings

Fig. 1 is an exploded perspective view of a rotating portion of an electric fan according to embodiment 1 of the present invention.

Fig. 2 is a front view of a shroud ring of the electric fan according to embodiment 1.

Fig. 3 is an enlarged perspective view of the lower end of the shroud ring of the electric fan according to embodiment 1, as viewed from the inside of the circumference.

Fig. 4 is an enlarged perspective view of the lower end of the shroud ring of the electric fan according to embodiment 1, as viewed from the outside of the circumference.

Fig. 5 is a rear view of the front part of the shroud of the electric fan according to embodiment 1.

Fig. 6 is a perspective view of a lock catch of the electric fan according to embodiment 1.

Fig. 7 is an exploded enlarged view of a coupling portion between a shroud ring and a lock catch of the electric fan according to embodiment 1.

Fig. 8 is an enlarged view of a coupling portion of a shroud ring and a lock catch of the electric fan according to embodiment 1.

Fig. 9 is an enlarged view of a coupling portion of a shroud ring and a lock catch of the electric fan according to embodiment 1.

Fig. 10 is an enlarged sectional view of a coupling portion of a shroud ring and a lock catch of an electric fan according to embodiment 2 of the present invention.

Fig. 11 is an enlarged exploded view of a coupling portion between a shroud ring and a lock catch of an electric fan according to embodiment 3 of the present invention.

Fig. 12 is an enlarged sectional view of a coupling portion of a shroud ring and a lock catch of the electric fan according to embodiment 3.

Detailed Description

Hereinafter, an electric fan according to an embodiment of the present invention will be described in detail with reference to the drawings. Here, the present invention is not limited to the embodiment.

Embodiment 1.

Fig. 1 is an exploded perspective view of a rotating portion of an electric fan according to embodiment 1 of the present invention. As shown in fig. 1, the rotating portion 1 includes: a rotary part base 2 which is supported by the gantry 21 for supporting the entire structure and has a motor 22 built therein; a blade 3 driven by a motor 22; a rotator 4 for fixing the blade 3 to the motor 22; a shroud rear portion 6 fixed to the rotary base portion 2 so as to be sandwiched between the rotary base portion 2 and the shroud fixing member 5; a shroud ring 100 fixed to the shroud rear portion 6; a shroud front 200 that engages with the shroud ring 100 and surrounds the blades 3 together with the shroud rear 6; a locking buckle 300 which is mounted on the shield ring and prevents the shield front 200 from moving in a direction of engaging with and disengaging from the shield ring 100; and a snap fixing screw 7.

Fig. 2 is a front view of a shroud ring of the electric fan according to embodiment 1. Fig. 3 is an enlarged perspective view of the lower end of the shroud ring of the electric fan according to embodiment 1, as viewed from the inside of the circumference. Fig. 4 is an enlarged perspective view of the lower end of the shroud ring of the electric fan according to embodiment 1, as viewed from the outside of the circumference. As shown in fig. 2 to 4, on the inner peripheral surface 102 of the circumferential portion 101 of the shield ring 100, shield

rear engagement portions

103a, 103b, 103c, 103d, 103e, 103f, 103g, 103h are provided, which are constituted by a pair of protrusions arranged in the axial direction of the motor 22. In the following description, the shroud rear engaging

portions

103a, 103b, 103c, 103d, 103e, 103f, 103g, and 103h are referred to as shroud rear engaging portions 103 when the shroud rear

engaging portions

103a, 103b, 103c, 103d, 103e, 103f, 103g, and 103h need not be treated separately. The shield ring 100 is engaged with the shield rear portion 6 by clamping the circumferential portion 6a of the shield rear portion 6 between the pair of projections of the shield rear portion engaging portion 103. The shroud rear portion 6 fixed to the rotary base portion 2, the shroud front portion 200 covering the blades 3 from the side opposite to the motor 22, and the shroud ring 100 connecting the shroud rear portion 6 and the shroud front portion 200 constitute a shroud that can be divided in the axial direction of the motor 22.

Further,

projections

104a, 104b, 104c, 104d, 104e, 104f, 104g, 104h for snap-fastening the shroud front 200 are formed on the inner peripheral surface 102 of the circumferential portion 101. In the following description, the

projections

104a, 104b, 104c, 104d, 104e, 104f, 104g, and 104h are referred to as "projections" when the projections are not to be treated separately. In the circumferential portion 101, a hook hole 105 penetrating from the inner circumferential surface 102 to the outer circumferential surface 106 is formed. On the outer peripheral surface 106 of the circumferential portion 101, a convex portion 107 is formed. The male portion 107 has a threaded hole 108 having an axis parallel to the axis of the circumferential portion 101.

Fig. 5 is a rear view of the front part of the shroud of the electric fan according to embodiment 1. As shown in fig. 5, the shroud front 200 includes: a circular grid portion 201; a cylindrical portion 202 projecting concentrically on the back surface of the grid portion 201 and having an outer diameter equal to the inner diameter of the inner circumferential surface 102 of the shroud ring 100;

relief portions

203a, 203b, 203c, 203d, 203e, 203f, 203g that avoid interference with the protrusion 104 when the cylindrical portion 202 is inserted inside the circumferential portion 101 of the shield ring 100;

hook grooves

205a, 205b, 205c, 205d, 205e, 205f, 205g formed from the

side surfaces

204a, 204b, 204c, 204d, 204e, 204f, 204g of the

relief portions

203a, 203b, 203c, 203d, 203e, 203f, 203g across the cylindrical portion 202; a snap touch portion 207 protruding from the cylindrical portion 202 toward the outer periphery of the grid portion 201; and a hook groove 205h formed from the snap contact portion outer peripheral surface 206 to the side surface 204 h. In the following description, the

concessional portions

203a, 203b, 203c, 203d, 203e, 203f, and 203g are denoted as concessional portions 203 when they are not to be treated separately. In the following description, the hooking

grooves

205a, 205b, 205c, 205d, 205e, 205f, and 205g are referred to as hooking grooves 205 when they are not to be treated separately.

After the cylindrical portion 202 is inserted into the circumferential portion 101 of the shield ring 100 with the projection 104 of the shield ring 100 aligned with the position of the relief portion 203, the shield front portion 200 is engaged with the shield ring 100 by rotating the projection 104 so as to be fitted into the hooking groove 205.

Fig. 6 is a perspective view of a lock catch of the electric fan according to embodiment 1. As shown in fig. 6, the lock catch 300 includes: a main body 301 having a shape along the outer peripheral surface 106 of the shield ring 100; a hook portion 303 formed on a surface 302 that becomes an apposition surface with the outer peripheral surface 106 when the main body 301 is fixed to the shield ring 100; and a frame portion 305 formed on the opposite side of the hook portion 303 with the body 301 interposed therebetween. The hook 303 has a shape in which a groove 304 is formed between the hook and the surface 302. The frame body 305 has an opening 306 on the surface 302 side. Further, a side surface 307 of the frame portion 305 is provided with an elongated hole 308 whose longitudinal direction is set toward the hook portion 303. The elongated hole 308 constitutes a screw insertion portion through which the clip fixing screw 7 attached to the screw hole 108 is inserted. A hole expansion portion 309 into which the screw head of the fastening and fixing screw 7 is fitted is provided at an end portion of the elongated hole 308 on the opposite side to the hooking portion 303. The hooking portion 303 is provided with a protrusion 310 at an end portion on the side opposite to the surface 302.

Fig. 7 is an exploded enlarged view of a coupling portion between a shroud ring and a lock catch of the electric fan according to embodiment 1. Fig. 8 and 9 are enlarged views of a coupling portion between the shroud ring and the lock catch of the electric fan according to embodiment 1. In each of fig. 7, 8, and 9, the illustration of the shroud rear portion 6 is omitted for easy viewing of the shape of the portion to be described. As shown in fig. 7, since the distance between the hook hole 105 and the convex portion 107 is the same as the distance between the hook portion 303 and the frame portion 305, the hook portion 303 of the lock catch 300 is inserted into the hook hole 105 of the shield ring 100 and the convex portion 107 is inserted into the frame portion 305. In a state where the convex portion 107 is inserted into the frame body portion 305, the lock catch 300 is pivotally supported on the shield ring 100 so as to be rotatable and slidable by fastening the catch fixing screw 7 to the screw hole 108 through the long hole 308.

In a state where the lock catch 300 is pivotally supported on the shield ring 100 so as to be rotatable and slidable, as shown in fig. 8, when the lock catch 300 is slid to a position where the surface 302 abuts against the outer peripheral surface 106 of the shield ring 100 and the groove 304 abuts against the edge 109 of the hook hole 105, the catch fixing screw 7 abuts against the end of the elongated hole 308 on the side where the expanded hole 309 is provided. That is, the hook portion 303 engages with the shield ring 100 when the snap fixing screw 7 is disposed on the one end 308a side of the elongated hole 308. By fastening the clip fixing screw 7 in a state where the hook portion 303 is engaged with the shield ring 100, the screw head is fitted into the enlarged hole portion 309, and the lock clip 300 is fixed so as not to be slidable nor rotatable.

In this way, since the lock catch is fixed and released by elastically deforming the lock catch in the past by tightening and loosening the catch fixing screw 7, it is not necessary to apply a large load. Therefore, the lock catch 300 can be formed in a shape without a handle protruding to the outside of the product.

Further, at this time, the projection 310 contacts the surface 208 of the snap contact portion 207 of the shroud front 200, and the shroud front 200 is prevented from rotating and the engagement with the shroud ring 100 is released.

On the other hand, as shown by an arrow a in fig. 9, when the lock catch 300 slides to a position where the groove 304 is not caught by the edge 109, the lock catch 300 can rotate in a direction shown by an arrow B in fig. 9 so that the hook portion 303 is disengaged from the hook hole 105 with the catch fixing screw 7 as an axis. At this time, the protrusion 310 moves out of the rotational range of the snap touching portion 207, and the shroud front 200 can be detached from the shroud ring 100. That is, when the snap fixing screw 7 is disposed on the other end 308b side of the elongated hole 308, the engagement between the hook portion 303 and the shield ring 100 is released.

Here, since the locking clip 300 cannot slide even if a load is applied thereto in a state where the screw head of the clip fixing screw 7 is fitted in the enlarged hole portion 309, the locking clip 300 is not released by peeling or unintentional contact.

The shapes of the lock catch 300 and the shield ring 100 may be such that a convex portion or a hook hole is provided in the lock catch 300 and a frame portion or a hook portion is provided in the shield ring 100.

In the above description, the shroud is constituted by the shroud front portion 200, the shroud ring 100, and the shroud rear portion 6, but the shroud ring 100 may be configured integrally with the shroud rear portion 6 or the shroud front portion 200. Here, when the shroud ring 100 and the shroud front portion 200 are formed integrally, the structure of the engagement portion between the shroud ring 100 and the shroud front portion 200 described above may be applied to the engagement portion between the shroud ring 100 and the shroud rear portion 6 by reversing the front and rear directions.

The electric fan according to embodiment 1 is less likely to cause an erroneous operation of the lock catch 300, and can reduce the operation load of the lock catch 300.

Embodiment 2.

Fig. 10 is an enlarged sectional view of a coupling portion of a shroud ring and a lock catch of an electric fan according to embodiment 2 of the present invention. In embodiment 2, the shape of the convex portion 107 of the shroud ring 100 is changed, and the retaining washer 8 is attached to the snap fixing screw 7. The rest is the same as embodiment 1.

As shown in fig. 10, in the electric fan according to embodiment 2, the convex portion 107 is divided by a dividing groove 110 perpendicular to the central axis of the circumferential portion 101, a circular hole 111 having a diameter larger than that of the snap fixing screw 7 is provided in a convex portion 107a which becomes the screw head side when the snap fixing screw 7 is attached, and a screw hole 112 is provided in a convex portion 107b which becomes the screw tip side. The snap fixing screw 7 is fastened to the screw hole 112 through the circular hole 111 in such a manner that the retaining washer 8 enters the dividing groove 110. With the anti-drop washer 8, the effect of preventing the buckle fixing screw 7 from dropping and losing can be obtained.

Here, a pin or a retaining screw having the same effect may be used instead of the snap fixing screw 7 and the retaining washer 8.

The electric fan according to embodiment 2 is less likely to cause an erroneous operation of the lock catch, and can reduce the operation load of the lock catch.

Embodiment 3.

Fig. 11 is an enlarged exploded view of a coupling portion between a shroud ring and a lock catch of an electric fan according to embodiment 3 of the present invention. Fig. 12 is an enlarged sectional view of a coupling portion of a shroud ring and a lock catch of the electric fan according to embodiment 3. In embodiment 3, the shape of the convex portion 107 of the shield ring 100 is changed, and the shape of the lock catch 300 is changed. The rest is the same as embodiment 1.

As shown in fig. 11, in the electric fan according to embodiment 3,

cylindrical portions

113 and 114 are provided coaxially with the screw hole 108 of the convex portion 107 of the shroud ring 100, and elongated

circular grooves

311 and 312 are provided on the surface of the lock catch 300 that contacts the front surface and the rear surface of the convex portion 107. The cylindrical portion 113 is engaged with the oblong groove 311, and the cylindrical portion 114 is engaged with the oblong groove 312. That is, the shroud ring 100 has

cylindrical portions

113 and 114 coaxial with the screw hole 108, and the lock catch 300 has

oblong grooves

311 and 312 rotatably supporting the

cylindrical portions

113 and 114. The housing 305 of the lock catch 300 has only front and back surfaces, and is easily elastically deformed when the

cylindrical portions

113 and 114 are engaged with the

oblong grooves

311 and 312. According to the above shape, the following effects can be obtained: the lock catch 300 can slide and rotate even in a state where the catch fixing screw 7 is not attached, and is held without falling off from the shroud ring 100.

The electric fan according to embodiment 3 is less likely to cause an erroneous operation of the lock catch, and can reduce the operation load of the lock catch.

The configurations described in the above embodiments are merely examples of the contents of the present invention, and may be combined with other known techniques, and a part of the configurations may be omitted or modified without departing from the scope of the present invention.

Description of reference numerals

1 a rotating part; 2 rotating the base part; 3, blades; 4, a rotator; 5a shield fixing member; 6, the rear part of the shield; 6a, 101 circumferential portions; 7, fastening a fixing screw; 8, an anti-drop washer; 21 a table frame part; 22 a motor; 100 shield rings; 102 an inner peripheral surface; 103. 103a, 103b, 103c, 103d, 103e, 103f, 103g, 103h shield rear engagement portion; 104. 104a, 104b, 104c, 104d, 104e, 104f, 104g, 104h, 310 protrusions; 105 hook hanging holes; 106 outer peripheral surface; 107. 107a, 107b convex; 108. 112 threaded holes; 110 dividing the groove; 111 a circular aperture; 113. 114, 202 cylindrical portions; 200 shroud front; 201 a grid portion; 203. 203a, 203b, 203c, 203d, 203e, 203f, 203g evacuation portions; 204a, 204b, 204c, 204d, 204e, 204f, 204g, 204h, 307 sides; 205. 205a, 205b, 205c, 205d, 205e, 205f, 205g, 205h hook slots; 206 buckling the outer peripheral surface of the touch part; 207 a snap touch; 300 locking the buckle; 301 a main body; 302 faces; 303 a hook part; 304 grooves; 305 a frame portion; 306 opening; 308, long holes; 308a, one end; 308b at the other end; 309 a reamer part; 311. 312 long circular groove.

Claims

1. An electric fan is provided with:

a rotating part having a motor built therein;

a blade driven by the motor;

a shroud having a shroud rear portion fixed to the rotating portion, a shroud front portion covering the blades from a side opposite to the motor, and a shroud ring connecting the shroud rear portion and the shroud front portion, the shroud being dividable in an axial direction of the motor;

a locking clip for preventing the shield front part from being disengaged from the shield ring; and

a clip fixing screw for supporting the locking clip shaft to the shield ring,

it is characterized in that the preparation method is characterized in that,

the protective cover ring is provided with a threaded hole for installing the buckle fixing screw,

the lock buckle is provided with a screw through part which is provided with a long hole for the buckle fixing screw installed in the screw hole to pass through,

the locking buckle is provided with a hole-enlarging part which is embedded with the screw head of the buckle fixing screw at one end side of the long hole,

the lock catch includes a hook portion that engages with the shield ring when the catch fixing screw is disposed on the one end side of the elongated hole, and releases the engagement with the shield ring when the catch fixing screw is disposed on the other end side of the elongated hole.

2. The electric fan as claimed in claim 1, wherein said shroud rear portion is of integral construction with said shroud ring.

3. An electric fan is provided with:

a rotating part having a motor built therein;

a blade driven by the motor;

a locking clip for preventing the back of the shield from being disengaged from the shield ring; and

a clip fixing screw for supporting the locking clip shaft to the shield ring,

it is characterized in that the preparation method is characterized in that,

4. The electric fan as claimed in claim 3, wherein said shroud front portion is of integral construction with said shroud ring.

5. The electric fan as claimed in any one of claims 1 to 4, further comprising a separation preventing washer installed to the snap fixing screw.

6. The electric fan as claimed in any one of claims 1 to 4, wherein the snap fixing screw is an anti-drop screw.

7. The electric fan as claimed in any one of claims 1 to 4, wherein the shroud ring has a cylindrical portion coaxial with the screw hole, and the lock catch has an elongated circular groove rotatably shaft-supporting the cylindrical portion.