Ventilation nozzle for portable fan

Abstract

To provide a ventilation nozzle for a portable fan that is an improvement over conventional arts, is detachably attached to a fan body, and can increase a ventilation speed to provide a user with cold sensation.SOLUTION: A ventilation nozzle 10 for a portable fan is hollow and has a generally funnel-shaped cross section, and has a contracting part 11 and an expanding part 12 that is detachably attached to a fan body 3. The expanding part 12 has a base end portion 14, and an intermediate portion 15 that has a cross-sectional shape that gradually tapers from the base end portion 14 toward the contracting part 11.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a blower nozzle for a portable fan.

Background Art

[0002] Conventionally, portable fans are well-known. For example, Patent Document 1 discloses a portable fan including a fan body having blades, a motor for rotating the blades, a housing portion for housing them, and a support rod extending from the fan body.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] According to the portable fan disclosed in Patent Document 1, since a coolant is housed in the housing portion, cold air can be blown from the front opening of the fan body even in the extremely hot environment in summer.

[0005] However, after using for a certain period of time, it is necessary to open the housing portion and replace the coolant housed therein, which is troublesome.

[0006] An object of the present invention is an improvement over the prior art, and to provide a blower nozzle for a portable fan that is detachable from the fan body and can increase the blowing speed to give a cooling sensation to the user.

Means for Solving the Problems

[0007] In order to solve the technical problems, the present invention relates to a blower nozzle for a portable fan having a fan body and a support rod.

[0008] The air blowing nozzle for a portable fan according to the present invention is hollow and has a substantially funnel-shaped cross-section, and has a constricting / diverging portion and a diverging portion that is detachably attached to the fan body. The diverging portion has a base end portion and an intermediate portion having a cross-sectional shape that gradually tapers from the base end portion toward the constricting / diverging portion.

Effects of the Invention

[0009] According to one or more embodiments of the air blowing nozzle for a portable fan according to the present invention, since it is hollow and has a substantially funnel-shaped cross-section, and has a constricting / diverging portion and a diverging portion that is detachably attached to the fan body, the air sent out from the fan body converges in the air blowing nozzle, so that the flow velocity increases. Compared with the air flow emitted from the rotating blades, it can lower the temperature of the user's skin and give a cool feeling.

Brief Description of the Drawings

[0010] The drawings show specific embodiments of the air blowing nozzle for a portable fan of the present invention according to the present disclosure, and include not only the essential configurations of the invention but also optional and preferred embodiments.

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Embodiments for Carrying out the Invention

[0011] Referring to the accompanying drawings, the details of the blower nozzle 10 for a portable fan according to the present invention will be described as follows. In addition, the following embodiments include not only the essential requirements that are indispensable for the present invention, but also the requirements that can be selectively adopted and the requirements that can be appropriately combined.

[0012] <First Embodiment> Referring to FIGS. 1 to 4, the blower nozzle 10 for a portable fan according to the first embodiment of the present invention is detachably attached to a portable fan 1 of a handy type that can be carried.

[0013] The portable fan 1 includes a substantially circular fan body 3 that houses the blades 2 and mechanical elements such as a motor (not shown) for rotating the blades 2, and a support rod 4 extending from the fan body 3. An operation button 6 for turning the power on and off for the blowing operation of the blades 2 of the fan body 3 is arranged on the support rod 4. Since the mechanical and electrical configurations of the fan body 3 are the same as those of conventionally known products, the description thereof is omitted.

[0014] On the front surface of the fan body 3, there is located a front opening 7 having a plurality of ribs radially extending from the central portion. The front opening 7 further has a plurality of openings located between the plurality of ribs in the circumferential direction. By pressing the operation button 6, the blades 2 driven by the motor rotate, and the air around the blades 2 is blown forward. Also, on the upper end of the fan body 3, a protrusion 8 extends in the circumferential direction.

[0015] The blowing nozzle (hereinafter referred to as the blowing nozzle) 10 for the portable fan is hollow and has a funnel-shaped cross section, and has a constriction part 11 and an expansion part 12 that is detachably attached to the fan body 3. The constriction part 11 and the expansion part 12 are each formed in a circular cross section. Also, a bent portion 18 is located at the boundary between the constriction part 11 and the expansion part 12.

[0016] The expansion part 12 has a base end portion 14 and an intermediate portion 15 having a cross-sectional shape that gradually tapers from the base end portion 14 toward the constriction part 11. A flange 14a is located at the outer peripheral edge portion (rear edge portion) of the base end portion 14.

[0017] Referring to FIG. 3, the blowing nozzle 10 is detachably attached to the portable fan 1 by covering the fan body 3 such that the flange 14a of the base end portion 14 of the expansion part 12 abuts against the fan body 3.

[0018] The air supply nozzle 10 can be formed from various known materials such as natural rubber, synthetic rubbers like silicone rubber, soft or hard plastic materials, metals such as aluminum and iron, and wood. However, the flange 14a of the proximal end portion 14 is preferably formed from an elastic material such as silicone rubber or natural rubber that is the same as or separate from the proximal end portion 14 in order to be stably attached to the fan body 3.

[0019] Also, the constriction / dilation portion 11 and the expansion portion 12 that the air being delivered touches are preferably formed from a material with high thermal conductivity, for example, aluminum. Aluminum has a thermal conductivity approximately three times that of iron, can effectively lower the temperature of the air being blown, and can be said to have higher rigidity and better shape retention compared to silicone rubber or soft plastic materials.

[0020] As shown in FIG. 4, by attaching the air supply nozzle 10 to the portable fan 1, the air sent forward from the front opening 7 of the fan body 3 passes through the intermediate portion 15 from the proximal end portion 14 of the expansion portion 12, gradually converges, and further converges at the constriction / dilation portion 11 and is discharged to the outside.

[0021] When the air converges and is pushed out from the constriction / dilation portion 11, compared to the case where it is directly discharged from the front opening 7, the flow velocity of the air being blown becomes higher, and when it collides with the user's skin, the temperature gradient of the air above the skin surface becomes larger, so that the user can feel cold.

[0022] Thus, even if the portable fan 1 has a simple structure without an air flow velocity adjustment function or a cooling function using a coolant or the like, by attaching the air supply nozzle 10, the air can be converged and made to collide forcefully with the skin, and by increasing the air flow velocity even more than the air flow velocity at the front opening 7, the temperature of the skin exposed to such air can be lowered.

[0023] Since the blower nozzle 10 is detachably attached to the fan body 3, it can be freely attached to and removed from the portable fan 1 having a simple structure. For example, the blower nozzle 10 can be attached only when the temperature is relatively high, and the blower nozzle 10 can be used without being attached when the temperature is relatively low. Thus, the usage mode can be freely selected.

[0024] <Second Embodiment> Referring to FIG. 5, since the basic structure of the blower nozzle 10 for the portable fan according to the present embodiment is the same as that of the first embodiment, only the differences will be described below. Also, for the following embodiments, since the basic structures are the same, only the differences will be described.

[0025] In the present embodiment, a plurality of partition walls 20 are provided on the inner peripheral surface of the expansion portion 12 of the blower nozzle 10. The partition walls 20 extend from the inner peripheral surface of the base end portion 14 through the inner peripheral surface of the intermediate portion 15 to the vicinity of the boundary between the expansion portion 12 and the contraction portion 11. Thus, by forming a plurality of partition walls 20 on the inner peripheral surface of the expansion portion 12, the air sent out from the front opening 7 of the fan body 3 collides with the partition walls 20 to form vortices, and when it collides with the user's skin, the temperature gradient of the air above the skin surface becomes larger, so that a cooler feeling can be given.

[0026] Although not shown, in order for the air to flow in a spiral shape, in addition to or instead of the plurality of partition walls 20, a spiral groove extending from the inner peripheral surface of the base end portion 14 of the expansion portion 12 to the inner peripheral surface of the contraction portion 11 may be formed. In addition to or instead of these, a plurality of protrusions may be randomly provided on the inner peripheral surfaces of the expansion portion 12 and the contraction portion 11.

[0027] <Third Embodiment> Referring to FIGS. 6(A), (B) and 7, in this embodiment, the blower nozzle 10 is attached to the fan body 3 via the mounting clip 30. The mounting clip 30 has a first clip 31 and a second clip 32 that are separably connected via a connecting portion 33. The first and second clips 31, 32 have first clamping pieces 31a, 31b and second clamping pieces 32a, 32b that sandwich an object at the tip by the elasticity of the spring portions 31c, 32c. In the illustrated example, the first clip 31 has a shape that is slightly larger than that of the second clip 32, but they may have the same shape and size, and the first and second clamping pieces 31a, 31b, 32a, 32b may not be rectangular but may be elliptical or the like.

[0028] As shown in FIG. 6, by attaching the first clip 31 of the mounting clip 30 to the support rod 4 of the portable fan 1 and attaching the second clip 32 to the blower nozzle 10 so as to be locked to the expansion portion 12, the portable fan 1 and the blower nozzle 10 can be detachably connected.

[0029] According to such a connection mode, even when the flange 14a of the base end portion 14 of the blower nozzle 10 does not have elasticity, the state in which the blower nozzle 10 is attached to the fan body 3 can be maintained. In addition, by releasing the locking of one of the first and second clips 31, 32, the connection between the portable fan 1 and the blower nozzle 10 is released, so that only the mounting clip 30 is separated and lost even in the state where the connection is released.

[0030] <Fourth Embodiment> Referring to FIGS. 8(A), (B) and 9, in this embodiment, the mounting clip 40 has a shape different from that of the mounting clip 30 of the third embodiment. Specifically, the first and second clips 41, 42 are connected to each other via a hinge portion 43. The first clip 41 has a first clamping piece 41a and a second clamping piece 41b that sandwich an object at the tip by the elasticity of the spring portion 41c. On the other hand, the second clip 42 has a bifurcated base plate 42a and a pair of bent elastic pieces 42b that stand up from the base plate 42a.

[0031] Referring to FIG. 8, the protrusion 8 of the fan body 3 is clamped by the first clip 41 of the mounting clip 40, and the flange 14a of the blower nozzle 10 is clamped by a pair of elastic pieces 42b, 42b of the second clip 42. Thus, the blower nozzle 10 can be detachably connected to the portable fan 1 via the mounting clip 40 and maintained in that state.

[0032] According to the mounting clip 40 according to the present embodiment, since the mounting clip 40 is compact, it is easy to carry and store. Also, since the blower nozzle 10 and the portable fan 1 are connected by the first and second clips 41, 42 connected via the hinge portion 43, compared with the third embodiment in which independent clips are respectively attached, the configuration is simpler and it can be said that it is easy to maintain the mounted state.

[0033] <Fifth Embodiment> Referring to FIGS. 10(A), (B) and 11, in the present embodiment, the blower nozzle 10 is connected to the portable fan 1 via a connecting band 50 formed of a flexible material such as silicone rubber or soft synthetic resin.

[0034] Referring to FIG. 11, the connecting band 50 has first and second end portions 51, 52 having circular through holes 51a, 52a and an intermediate portion 53 located between the first and second end portions 51, 52. An elliptical insertion hole 53a extending in the longitudinal direction is provided in the intermediate portion 53.

[0035] When using the connecting band 50, first, the lower end of the support rod 4 is inserted through the insertion hole 53a of the intermediate portion 53 and the intermediate portion 53 is moved so as to abut against the back surface of the fan body 3. From such a state, by inserting the contraction and expansion portion 11 of the blower nozzle 10 through the through holes 51a, 52a so that the first and second end portions 51, 52 overlap each other, the connecting band 50 can be wound around the blower nozzle 10 and the portable fan 1 to maintain them in a connected state with each other.

[0036] According to such a connecting band 50, since the blower nozzle 10 and the blower main body 3 are integrally fastened to each other, it can be said that it is difficult for the connection to be released even when receiving an external impact as compared with the mounting clips 30 and 40.

[0037] <Sixth Embodiment> Referring to FIGS. 12(A), (B), FIGS. 13(A), (B) and FIGS. 14(A), (B), in the present embodiment, similar to the first embodiment, the blower nozzle 60 has a constricting and expanding portion 61, and an expanding portion 62 having an intermediate portion 65, a base end portion 64 and a flange 64a, and is hollow and has a substantially funnel-shaped cross section. At the boundary between the constricting and expanding portion 61 and the expanding portion 62, a bent portion 68 extending in the circumferential direction is located.

[0038] The blower nozzle 60 is made of silicone rubber (flexible material), and the expanding portion 62 of the blower nozzle 60 is compressively deformable and stretchable in the thickness direction. That is, in the unused state, by applying a compressive force in the thickness direction, the expanding portion 62 can be buckled and crushed to be compacted.

[0039] Referring to FIGS. 14(A), (B), as such a compressively deformable structure, in the compressed state, the expanding portion 62 has a spiral shape with radial unevenness repeated in plan view. Further, in each convex portion 66 and each concave portion, a groove 67 extending in the circumferential direction is formed, and by applying a compressive force, it is in a state of being buckled and folded.

[0040] Referring to FIGS. 13(A), (B), in the state where the blower nozzle 60 is extended, the expanding portion 62 has a stepped shape that gradually tapers toward the constricting and expanding portion 61. Further, on the inner peripheral surface of the expanding portion 62, a plurality of protrusions 69 extending in the circumferential direction corresponding to the groove 67 are formed. Thus, due to the formation of the plurality of protrusions 69, the air sent out from the front opening 7 of the blower main body 3 hits the skin in a state of generating a vortex by colliding with the protrusions, and can give a cooler feeling to the user as compared with the case where the inner peripheral surface is flat.

[0041] Since the blower nozzle 60 according to this embodiment is stretchable, when not in use, it can be compactly folded for easy carrying and storage. When in use, it can be extended to form a relatively large internal space, allowing more air to be stored inside and converged to be blown out from the expansion and contraction part 61. As a result, the blowing speed can be increased, giving a cooling sensation to the user.

[0042] Although not shown, the blower nozzle 60 may be attached to the blower main body 3 by the mounting clips 30, 40 and / or the connecting band 50. Furthermore, the blower nozzles 10, 60 and the connecting means described in this specification can be used in combination with each other.

[0043] The blower nozzles 10, 60 for the portable blower according to the present invention can include at least the following embodiments. The embodiments can be adopted separately or in combination with each other. (1) It is detachably connected to the portable blower via a mounting clip. (2) It is detachably connected to the blower main body via a connecting band. The connecting band has a first end portion and a second end portion having through holes, and an intermediate portion located between the first end portion and the second end portion. An insertion hole through which the support rod can be inserted is formed in the intermediate portion. (3) It is formed of a flexible material. The intermediate portion has a shape that can be compressed and deformed and expanded and contracted in the thickness direction, and in the compressed state, it has a spiral shape with radial unevenness repeated in a plan view.

Explanation of Reference Numerals

[0044] 1 Portable blower 3 Blower main body 4 Support rod 10 Blower nozzle 11 Expansion and contraction part 12 Expansion part 14 Base end portion 15 Intermediate portion 30 Mounting clip 40 Mounting clip 50 Connecting band 51 First end 51a Through-hole 52 Second end 52a Through-hole 53 Middle part 53a Insertion hole 60 Air supply nozzle 65 Middle part

Claims

1. In a blower nozzle for a portable fan having a fan body and a support rod, it is hollow and has a substantially funnel-shaped cross-section, and has a constricted and expanded portion and an expanded portion detachably attached to the fan body. The expanded portion has a base end portion and an intermediate portion having a cross-sectional shape that gradually tapers from the base end portion toward the constricted and expanded portion. The blower nozzle for the portable fan is characterized by this.

2. The blower nozzle for a portable fan according to claim 1, which is detachably connected to the portable fan via a mounting clip.

3. It is detachably connected to the fan body via a connecting band. The connecting band has first and second end portions having through holes and an intermediate portion located between the first and second end portions. An insertion hole through which the support rod can be inserted is formed in the intermediate portion. The blower nozzle for a portable fan according to claim 1.

4. It is formed of a flexible material. The intermediate portion has a shape that can be compressed and deformed and expanded and contracted in the thickness direction, and in a compressed state, it has a spiral shape with radial irregularities repeated in a plan view. The blower nozzle for a portable fan according to claim 1.

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