JPH024315Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to an elevation angle adjustment device for electric fans, bonnet dryers, desk lamps, etc.

(B) Prior art As a technology prior to the present invention, there is an elevation angle adjustment device described in the specifications and drawings of Japanese Utility Model Publication No. 58-5190 and Japanese Utility Model Application Publication No. 57-160493. The elevation adjustment device uses a torsion spring to bias the neck piece supporting the main body of the device in the elevation direction, thereby ensuring safe and smooth rotation of the neck piece in the elevation adjustment device. However, the regulation of the maximum elevation angle, the so-called elevation range, is achieved by contacting the fork of the neck piece with the fork as shown in the former publication, and by contact of the protrusion formed on the fork with the regulating protrusion formed on the neck piece as shown in the latter publication. However, if the force from adjusting the elevation angle causes the ellipse to rotate too much during adjustment, a large force will be applied to the abutting part, which may cause damage.

(C) Problems to be Solved by the Invention The present invention provides an elevation adjustment device that can regulate the maximum elevation angle position without impact.

(d) Means for solving the problem The present invention pivots a neck piece that supports the main body of the device at two prongs, stores it in a recess formed in the neck piece, and attaches one end of a torsion spring that applies a force in the elevational direction to the neck piece. A protrusion is formed on the neck piece, which locks the neck piece and locks and fixes the other end to the fork, and abuts the other end of the torsion spring that is locked to the fork just before the maximum tilting and rotational position of the neck piece. The problem can be solved by means of

(e) Function The present invention uses the elasticity of the torsion spring to direct the torsion spring to the maximum elevation angle position by bringing the protrusion formed on the neck piece into contact with the other end of the torsion spring that is locked and fixed to the forked part. It absorbs the rotational force applied to the neck piece.

(F) Example The elevation angle adjustment device 2 of the electric fan 1 shown in the figure is taken as an example, and the first example shown in FIGS. 1 to 10,
The present invention will be explained based on the second embodiment shown in FIG.

First, a first example will be described.

The electric fan 1 includes a stand 6 consisting of a base 3, a hollow support 4 protruding from the base 3, and a support rod 5 supported by the hollow support 4 so as to be able to rise and fall freely, and a stand 6 that is tilted up and down at the tip of the support rod 5. It consists of a fan main body 7 connected and supported by an angle adjustment device 2. The base 3 is equipped with an electric motor 9 for driving the blower blades 8 of the fan main body 7 and a swing motor 1.
0 control switch and control circuit board are installed inside. The support rod 5 has a support part 13 formed with a bifurcated part 12 for pivotally supporting the neck piece 11, and the support part 1.
3 is attached to the upper end of the cosmetic tube part 14, and the lifting guide part and the reinforcing metal column part 15 are attached to the lower end of the cosmetic tube.
It becomes more.

The electric fan main body 7 is a pivot 1 to a neck piece 11.
an L-shaped board 17 on which the L-shaped board 6 is vertically disposed, a swing motor 10 mounted on the horizontal upper surface of the L-shaped board 17;
an electric motor 9 formed on the vertical front surface of the mold substrate 17;
A blower blade 8 driven by the electric motor 9, a guard body 18 that covers the blower blade 8, a cover body 19 that covers the board 17 and the swing motor 10, and a cover body 19 that covers the swing motor 10 and the swing motor 10. and a balance weight 20 that is stored in the gap between. Said substrate 1
7 is molded by aluminum die-casting, and the inner stator 21 of the electric motor 9 is fitted and supported on the outer peripheral surface on the vertical front surface, and the rotating shaft 23 of the outer rotor 22 is inserted into the inner peripheral surface and supported by a bearing. A cylindrical portion 24 is provided protrudingly. The rear end bearing of the cylindrical portion 24 of the substrate 17 and the rotating shaft 23
A covering plate 25 is formed on a portion facing the rear end of the rotary shaft 23 to prevent the electrical cord from coming into contact with the rotating shaft 23.

The output shaft 26 of the oscillating motor 10 protrudes from the horizontal lower surface of the board 17, and the output shaft 26 is provided with a cam plate 2.
7 is attached to the cam plate 27, and the other end of a link 28 having one end pivoted to the neck piece 11 is fitted onto the cam plate 27. The lower surfaces of the cam plate 27 and the link 28 are covered by a supported plate 29 fixed to the base plate 17, and at the same time, the cam plate 27 is pivotally supported. The balance weight 20 is formed to fill the gap between the cover body 19 and the oscillating motor 10, and the balance weight 20 is formed so as to fill the gap between the cover body 19 and the swing motor 10. It is formed so that most of it is located behind the vertical line. By covering the cam plate 27 and the link 28 with a supported plate 29, the balance weight 20 can be made larger.

The elevation angle adjustment device 2 includes a support portion 13 in which a forked portion 12 is formed, a neck piece 11 that is pivotally supported by a pivot 30 on the forked portion 12, and the neck piece 11.
A locking body 32 is urged outward by an elastic body 31 housed in the neck piece 11, and a cylindrical part 34 that forms a pivot insertion hole 33 protrudes from the neck piece 11, and the inner surface of the two-pronged part 12 is pivoted. It consists of a support plate 35 attached to the neck piece 11, and a torsion spring 37 housed in a recess 36 formed in the neck piece 11. The support plate 35 is formed into an L-shape by bending a metal plate. A depression/elevation angle range regulating protrusion 38 is formed on the upper edge of the support plate 35 . The support plate 35 is formed with an engagement hole 39 through which the locking body 32 engages and disengages to hold the neck piece 11 at an appropriate rotational position (elevation/elevation angle adjusting device) with respect to the support portion 13. The regulating protrusion 35 is inserted into the neck piece 11 to form a groove 40 for regulating the range of rotation of the neck piece 11. One end of the torsion spring 37 housed in the recess 36 of the neck piece 11 is engaged with a locking portion 41 of the neck piece 11, and the other end is engaged with a notch-shaped locking portion 42 of the support plate 35 supported by the forked portion 12. Fixed. The support plate 35 is pivoted to the neck piece 11, and at the same time the elastic body 31 and the locking body 32 are attached, the torsion spring 37 is housed in the recess 36, one end is locked to the locking part 41, and the other end is attached to the elastic body 37. It bends against the force and locks into the locking portion 42. At this time, the support plate 35 is moved to the neck piece 11 by the elastic force of the torsion spring 37.
is in the most supine position. Thereafter, the neck piece 11 is inserted into the forked part 12 of the support part 13 and supported by the pivot 30. The pivot 30 is formed of a bolt and nut. When the neck piece 11 is pivotally supported by the forked portion 12, the other end of the torsion spring 37, which is locked to the support plate 35, abuts and is locked to the protrusion 43 of the support portion 13. Therefore, the other end of the torsion spring 37 is securely supported by the locking portion 42 and the protrusion 43 of the support plate 35 and is locked and fixed. A notch 44 through which the other end of the torsion spring 37 is inserted is formed on the side surface of the neck piece 11 where the recess 36 is formed, so that protrusions 45 and 46 that abut the other end of the torsion spring 37 are provided on both sides of the notch 44. is forming. The protrusion 4
The opening angle α centered on the pivot shaft 30 of the grooves 5 and 46 is formed to be smaller than the opening angle β of the groove portion 40, and the opening angle α
is the engagement range angle γ of the locking body 32 to the engagement hole 39
The shape is the same as or larger than that. The example shows a case where the opening angle α and the engagement range angle γ are the same, and the opening angle α
indicates the area between the protrusions 45 and 46, and the engagement range angle γ
Although it is larger, due to the wire diameter of the torsion spring 37, the substantial opening angle is the same as α. As shown in FIGS. 1 and 3, gaps a and b are formed between the regulating protrusion 38 and the side of the groove 40 at the maximum elevation and elevation movement position of the locking body 32, and this gap opens. This is the difference between the angle α and the opening angle β. When the fan main body 7 is held and the elevation angle is adjusted, the torsion spring 37 is biased in the elevation direction so as to balance the weight of the fan main body 7. trying to turn. At this time, the restriction protrusion 38 and the side portion of the groove 40 come into contact with each other to prevent movement in the elevation angle direction. Immediately before the restriction protrusion 38 comes into contact, the protrusions 45 and 46 of the neck piece 11 The torsion spring 37 _is brought into contact with the torsion spring 37, as shown in the schematic diagram of _FIG . It softens the impact on FIG. 1 shows a state in which the maximum elevation angle position is locked, in which the protrusion 45 is in contact with the torsion spring 37, and from this state it can be rotated by the gap b to reach the maximum depression state, and the protrusion 45 is in contact with the torsion spring 37. Press 37 to break it. When the hand is released in the maximum tilted state, the elasticity of the torsion spring 37 pushes it back to the maximum tilted/elevation angle position and locks it. Even in the state where the maximum elevation angle position shown in Fig. 3 is locked, the first
The same operation as shown in the figure is performed.

FIG. 11 shows a second embodiment of the present invention.
As an alternative structure to the regulating protrusion 38 and groove 40 in the first embodiment, a protrusion 50 is formed on the side surface of the neck piece 11, and an arcuate elongated hole 51 is formed on the support plate 35.

It should be noted that the present invention is not limited to the above-mentioned embodiments, but can be implemented in various structures having the structure of the present invention without departing from the accompanying effects. For example, network piece 1
Protrusion 3 to prevent excessive rotation of elevation and rotation of 1.
Although the first embodiment has a special structure such as the forked portion 8 and the groove portion 40, the present invention is not particularly limited. Good too.

(g) Effects of the invention This invention utilizes a torsion spring attached to balance the weight of the main body of the device, and makes the protrusion come into contact with the torsion spring just before the maximum position of elevation and rotation, thereby increasing the rotation adjustment force. This prevents deformation and damage to the elevation angle adjustment device.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, and Fig. 1 to Fig. 10 show the first embodiment, Fig. 1 is a side sectional view of the main part at the maximum depression angle adjustment position, and Fig. 2 is a horizontal adjustment position. Figure 3 is a side sectional view of the main part at the maximum elevation angle adjustment position, Figure 4 is a cross-sectional rear view of the main part in the state shown in Figure 2, and Figure 5 is an exploded perspective view of the right side of the neck piece. , Fig. 6 is an exploded perspective view of the left side of the same, Fig. 7 is an explanatory diagram of the action of the torsion spring of the present invention, Fig. 8 is a perspective view of the electric fan, Fig. 9 is a side view of the same, and Fig. 10 is a sectional view of the main part of the electric fan. , FIG. 11 is an exploded perspective view of the right side of the neck piece of the second embodiment. 2... elevation angle adjustment device, 7... electric fan main body, 11...
Neck piece, 12... bifurcated part, 13... support part, 3
5... Support plate, 36... Recess, 37... Torsion spring, 38
...Regulating protrusion, 40...Groove, 41, 42...Locking part,
45, 46...Protrusion.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A neck piece that supports the main body of the device is pivotally supported by the two prongs, and is housed in a recess formed in the neck piece, and one end of a torsion spring that applies a force in the elevational direction to the neck piece is locked to the neck piece. At the same time, the other end is locked and fixed to the forked part, and the neck piece is formed with a protrusion that comes into contact with the other end of the torsion spring that is locked to the forked part immediately before the maximum elevation rotation position of the neck piece. Angle adjustment device. 2. An elevation angle adjustment device according to claim 1 of the patented utility model registration claim, which comprises a support plate integrated with the fork part pivoted on the side surface of the neck piece, and the other end of the torsion spring is locked and fixed to the support plate. .