CN223473264U - Hair drier - Google Patents

Abstract

The utility model discloses a hair dryer. The hair dryer includes a hair dryer main body, a power cord and a wire clamping structure. The hair dryer main body has an air inlet and an air outlet, and an air flow channel connecting the air inlet and the air outlet; the power cord has an electrical connection part and an insulating part, the electrical connection part is connected to the hair dryer main body, and at least a part of the insulating part can pass through the hair dryer main body; the wire clamping structure is arranged in the hair dryer main body and clamped on the outer peripheral side of the power cord; the wire clamping structure is provided with a first through hole connected to the air flow channel, the hair dryer main body is provided with a second through hole suitable for connecting the outside world and the first through hole, and at least a part of the wire clamping structure is located between the electrical connection part and the second through hole to form a barrier. Without changing the overall volume, the hair dryer not only better protects the hair dryer, but also effectively increases the air output to meet the user's demand for a larger air volume.

Description

Hair drier

Technical Field

The utility model relates to the technical field of household appliances, in particular to a blower.

Background

As a small household appliance, a blower is often used, and for portability, a blower is also required to be compact and fine. The existing in-line blower has relatively small volume and is easy to carry. But under the condition that the volume of the blower is smaller, the number of the air inlet holes which are oppositely arranged on the blower is limited, so that the air outlet volume of the blower is limited correspondingly, the maximum air outlet volume is relatively smaller, the air outlet blowing effect can be influenced, and the user experience is poor.

Disclosure of utility model

In order to solve the technical problems, the main purpose of the utility model is to provide a blower, which aims to solve the problem that the traditional blower cannot guarantee large air output under the condition of smaller volume.

In order to achieve the above object, the present utility model provides a blower comprising:

The air blower comprises a blower body, a fan and a fan, wherein the blower body is provided with an air inlet hole, an air outlet hole and an air flow channel communicated with the air inlet hole and the air outlet hole;

a power cord having an electrical connection portion connected within the blower body and an insulating portion, at least a portion of the insulating portion being penetrable from the blower body;

The wire clamping structure is arranged in the blower main body and is clamped on the outer peripheral side of the power wire;

The air blower is characterized in that a first through hole communicated with the air flow channel is formed in the wire clamping structure, a second through hole which is suitable for communicating the outside with the first through hole is formed in the blower main body, and at least part of the wire clamping structure is located between the electric connection part and the second through hole to form a barrier.

Optionally, the air inlet hole is arranged on the peripheral side surface of the blower main body;

The tail end of the blower main body is provided with a threading hole, the insulation part penetrates out of the threading hole, and the second through hole is arranged at the tail end of the blower main body and is positioned at the periphery side of the threading hole.

Optionally, the wire clamping structure is annular and coaxial with the threading hole, the insulating part is sleeved at the threading hole, the wire clamping structure is sleeved at the outer periphery of the power wire, and the first via hole is arranged on the surface of the wire clamping structure extending radially along the wire clamping structure.

Optionally, the electrical connection portion includes a conductive wire, the insulation portion includes a wire sleeve, the wire sleeve is sleeved on an inner peripheral side of the threading hole and is coated on an outer peripheral side of the conductive wire, and at least part of the conductive wire can extend out from a front end of the wire sleeve to be connected inside the blower main body;

the wire clamping structure is provided with a first clamping part clamped at the outer peripheral side of the wire sleeve and a second clamping part clamped at the outer peripheral side of the front end of the wire sleeve, wherein the guide wire is exposed out of the second clamping part.

Optionally, the first clamping portion is including the cover locating the first snap ring of insulating portion periphery side, the second clamping portion is including the cover locating the second snap ring of wire periphery side, first snap ring with the second snap ring is followed the axial of through wires hole is the interval setting, and with the power cord is followed form the cooperation of stopping in the axial of through wires hole.

Optionally, the periphery side of line cover still is equipped with the joint recess, first snap ring is including first half ring body and the second half ring body that is connected, first half ring body with the second half ring body all is located in the joint recess, and respectively the joint in the joint recess is along its radial both sides.

Optionally, the second snap ring is located outside the clamping groove, and forms a stop fit with the outer side wall of the clamping groove along the axial direction of the threading hole.

Optionally, the first protruding card that the axial one side protrusion of first semi-ring body was equipped with, the protruding second card that one side protrusion of axial one side of second semi-ring body was equipped with is protruding, first card protruding with protruding joint of second card respectively in the radial both sides of wire, with enclose jointly and form the second snap ring.

Optionally, the first half ring body and the second half ring body are opposite surfaces, one of the surfaces is provided with a positioning protrusion, the other surface is provided with a positioning groove matched with the positioning protrusion in a clamping way, and the positioning protrusion and the positioning groove are matched with each other in a clamping way along the radial direction of the power line.

Optionally, the blower main body includes a first casing and a second casing connected to each other, and an inner cylinder disposed inside the second casing, the air outlet is disposed on the first casing, the air inlet is disposed on a peripheral side surface of the second casing, the second through hole is disposed on a distal end surface of the second casing, and the wire clamping structure is disposed in the second casing;

The inner cylinder is provided with a vent hole connected with the air inlet, one end of the inner cylinder is connected with the first shell and sleeved on the inner peripheral side of the second shell, and the wire clamping structure is covered on the other end of the inner cylinder.

The technical scheme provided by the utility model has the following beneficial effects:

The utility model provides a hair dryer which comprises a hair dryer body, a power line and a wire clamping structure, wherein an air inlet hole is formed in the peripheral side face of the hair dryer body, air flow can enter an air flow channel in the hair dryer body from the air inlet hole, after being heated or guided, the air flow can be blown to hair from an air outlet hole of the hair dryer body, the hair dryer body is penetrated with the power line, a power supply device and a heating device can be electrically connected through the power line, so that the heating device can heat the air flow entering the hair dryer body and then blow the air flow from the air outlet hole, the power line can be fixed on the hair dryer body through the wire clamping structure, the power line is prevented from being easily shifted, the power line is prevented from being connected to failure, a first through hole is formed in the wire clamping structure, the hair dryer body is provided with a second through hole which is suitable for communicating the outside with the first through hole, and the air flow outside can pass through the first through hole to enter the air flow channel of the hair dryer body, and the air quantity of the air inlet hole is increased through the number of the through holes. According to the utility model, on one hand, the power line can be fixed through the wire clamping structure, so that the power line is not easy to pull out in the use process, and better electrical connection stability is ensured; on the other hand, can add the second via hole through the card line structure and make in the hair-dryer main part, the air current can be from the second via hole in entering air current passageway behind first via hole to increase the air output, because in power cord department trompil makes outside liquid easily get into power cord department especially electric connection department, lead to the hair-dryer to short circuit or circuit damage easily, consequently through card line structure separation in between electric connection portion and the second via hole of power cord, can effectively avoid outside liquid to get into in the hair-dryer main part, especially can block that liquid directly falls into electric connection portion department, can guarantee the hair-dryer not fragile better. Under the condition that the whole volume of the blower is unchanged, the blower is better protected, and the air output is effectively improved, so that the use requirement of a user for larger air output is met.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a blower according to an embodiment of the present utility model;

fig. 2 is an exploded view of the blower of fig. 1;

fig. 3 is a schematic cross-sectional view of the blower of fig. 1;

Fig. 4 is a schematic view of the blower (excluding the first and second housings) shown in fig. 1;

Fig. 5 is an exploded view of the blower of fig. 4 (excluding the first and second housings);

FIG. 6 is a schematic diagram of the structure of the wire clip shown in FIG. 1;

Fig. 7 is a schematic view of the card wire structure shown in fig. 6 from another view.

Reference numerals illustrate:

100-hair dryer, 1-hair dryer main body, 11-first shell, 111-air outlet hole, 12-second shell, 121-air inlet hole, 122-second through hole, 123-threading hole, 13-inner barrel, 131-vent hole, 2-power cord, 21-electric connection part, 22-insulation part, 3-wire clamping structure, 31-first clamping part, 311-first half-ring body, 312-second half-ring body, 313-first through hole, 32-second clamping part, 321-first clamping protrusion, 322-second clamping protrusion, 33-positioning protrusion, 34-positioning groove and 35-first mounting hole.

The achievement of the object, functional characteristics and excellent effects of the present utility model will be further described with reference to specific embodiments and drawings.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the case where a directional instruction is involved in the embodiment of the present utility model, the directional instruction is merely used to explain the relative positional relationship, movement condition, etc. between the components in a specific posture, and if the specific posture is changed, the directional instruction is changed accordingly.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

The utility model provides a blower 100, in particular referring to fig. 1 and 2, in the embodiment, the blower 100 comprises a blower main body 1, a power cord 2 and a wire clamping structure 3, wherein the blower main body 1 is provided with an air inlet hole 121, an air outlet hole 111 and an air flow channel communicated with the air inlet hole 121 and the air outlet hole 111, the power cord 2 is provided with an electric connection part 21 and an insulating part 22, the electric connection part 21 is connected in the blower main body 1, at least part of the insulating part 22 can penetrate out of the blower main body 1, the wire clamping structure 3 is arranged in the blower main body 1 and clamped on the outer periphery side of the power cord 2, a first through hole 313 communicated with the air flow channel is arranged on the wire clamping structure 3, a second through hole 122 suitable for communicating the outside with the first through hole 313 is arranged on the blower main body 1, and at least part of the wire clamping structure 3 is positioned between the electric connection part 21 and the second through hole 122 to form a barrier.

In this embodiment, an air inlet 121 is formed on the peripheral side of the blower main body 1, air can enter the air flow channel in the blower main body 1 from the air inlet 121, after being heated or guided, the air can be blown to hair from the air outlet 111 of the blower main body 1, a power line 2 is arranged on the blower main body 1 in a penetrating manner, a power supply device and a heating device can be electrically connected through the power line 2, so that the heating device heats the air flow entering the blower main body 1 and then blows out from the air outlet 111, the power line 2 can be fixed on the blower main body 1 through a wire clamping structure 3, the power line 2 is prevented from being easily shifted, and the connection failure of the power line 2 is avoided, a first through hole 313 is formed in the wire clamping structure 3, a second through hole 122 suitable for communicating the outside with the first through hole 313 is formed in the blower main body 1, and the external air can pass through the first through hole 313 from the second through hole 122 to enter the air flow channel of the blower main body 1, and the number of the air inlet is increased through the wire clamping structure 3. In the utility model, on one hand, the power line 2 can be fixed through the wire clamping structure 3, the power line 2 is not easy to pull out in the using process, and better electric connection stability is ensured, on the other hand, the second through hole 122 can be additionally arranged on the blower main body 1 through the wire clamping structure 3, air flow can enter the air flow channel from the second through hole 122 through the first through hole 313, so that the air outlet quantity is increased, and because the opening at the power line 2 easily enters the power line 2, particularly the electric connection part 21, the blower 100 is easy to be short-circuited or damaged, the air blocking structure 3 can effectively prevent external liquid from entering the blower main body 1, particularly prevent the liquid from directly falling into the electric connection part 21, and better ensure that the blower 100 is not easy to damage. Under the condition that the whole volume of the blower 100 is unchanged, the blower 100 is better protected, and the air output is effectively improved, so that the use requirement of a user for larger air output is met.

As shown in fig. 1 to 2, the blower body 1 includes a first casing 11 and a second casing 12 connected to each other, and an inner cylinder 13 provided inside the second casing 12. Preferably, the first casing 11, the second casing 12 and the inner cylinder 13 are all substantially cylindrical, and the outer diameters of the first casing 11 and the second casing 12 are the same, so that the outer surface of the blower 100 is smoother, and the inner cylinder 13 and the second casing 12 are substantially coaxial. The air outlet 111 is arranged on the first shell 11, the air inlet 121 is arranged on the peripheral side surface of the second shell 12, the second through hole 122 is arranged on the end surface of the second shell 12, the wire clamping structure 3 is arranged in the second shell 12, the inner cylinder 13 is provided with a vent hole 131 connected with the air inlet 121, one end of the inner cylinder 13 is connected with the first shell 11 and sleeved on the inner peripheral side of the second shell 12, and the wire clamping structure 3 is covered on the other end of the inner cylinder 13 so as to be arranged closer to the end of the second shell 12. The inner cylinder 13 may be used to connect the second housing 12 and the air flow channel, and the inner cylinder 13 may be used to block the air inlet 121, so as to prevent external liquid or impurities from directly entering the blower main body 1, thereby affecting the normal operation of the blower 100.

In the present utility model, the radial direction means the radial direction of the blower main body 1, the circumferential direction means the circumferential direction of the blower main body 1, and the axial direction means the axial direction of the blower main body 1. For convenience of description, the directions of the components of the blower 100 will be described in the radial, circumferential, and axial directions, and the radial, circumferential, and axial directions of a certain component will be described correspondingly.

It will be appreciated that the air inlet 121 may be located near the air inlet of the motor inside the blower 100, and the air outlet 111 may be located closer to the user side. Preferably, the air flow duct extends along the axial direction, so that the air flow is less in wind resistance and higher in working efficiency. The power cord 2 may be disposed at a position from the blower main body, according to the shape of the blower main body, the power cord 2 may be disposed from a peripheral side of the blower main body, or the power cord 2 may be disposed from an end of the blower main body, and the power cord 2 is disposed at a threading hole 123 corresponding to a threading position, so that the air inlet 121 is generally not disposed on the same side as the threading hole 123, so as to prevent external dirt from entering the blower 100 and affecting normal operation of the blower 100.

Preferably, as shown in fig. 2 and 3, when the air inlet 121 is provided on the circumferential side of the blower body 1, a threading hole 123 is provided at the end of the blower body 1, the insulating portion 22 is threaded through the threading hole 123, and the second through hole 122 is provided at the end of the blower body 1 and is located on the circumferential side of the threading hole 123. Of course, the air inlet 121 may be provided in plurality, and the air inlet 121 may be disposed along the circumferential direction of the blower main body 1, specifically, along the circumferential direction of the second housing 12, and the air inlet area may be larger while the outer diameter of the blower main body 1 is smaller. The insulating part 22 of the power cord 2 is disposed at the end of the blower main body 1, so that the power cord 2 is not easy to bend, and damage to the power cord 2 can be avoided during use. The front end refers to the end of the blower 100 facing the user in normal use, and the end refers to the end facing away from the user, so that the power cord 2 can be better connected to a power supply (such as a socket) in normal use of the blower 100.

For the wire clamping structure 3, the wire clamping structure 3 is fixedly connected with the blower main body relatively, wherein the wire clamping structure 3 and the blower main body 1 can be directly or indirectly connected, specifically, as shown in fig. 3 to 5, a first mounting hole 35 is formed on the wire clamping structure 3, a second mounting hole is formed on the blower main body 1 or other components (such as an air guide frame, a motor or a heating element) located in the blower main body 1, and the wire clamping structure 3 is fixed in the blower main body by penetrating the first mounting hole 35 and the second mounting hole through a screw or a bolt. And then the power line 2 is fixed through the wire clamping structure 3, so that the power line 2 is not easy to be pulled and damaged in the use process.

Specifically, the wire clamping structure 3 is annularly arranged and coaxially arranged with the threading hole 123, preferably, the threading hole 123 is circular, the wire clamping structure 3 is circular, the insulating part 22 is sleeved at the threading hole 123, the wire clamping structure 3 is sleeved at the outer peripheral side of the power wire 2, and one side of the wire clamping structure 3 is abutted to the inner side of the second shell 12. The first via hole 313 is disposed on a surface of the wire clamping structure 3 extending along a radial direction thereof, so as to better communicate with the second via hole 122, and meanwhile, a barrier is formed between the second via hole 122 and the electrical connection portion 21 through the wire clamping structure 3, so that external dirt can be prevented from entering the blower 100, and the blower 100 can be better protected.

Preferably, the electrical connection portion 21 includes a conductive wire through which a power supply device and a circuit board structure inside the blower are electrically connected to supply power to the blower 100. The insulation part 22 comprises a wire sleeve, the wire sleeve is sleeved on the inner peripheral side of the threading hole 123 and is coated on the outer peripheral side of the guide wire, at least part of the guide wire can extend out of the front end of the wire sleeve to be connected to the inside of the blower main body 1, the wire clamping structure 3 is provided with a first clamping part 31 clamped on the outer peripheral side of the wire sleeve and a second clamping part 32 clamped on the outer peripheral side of the guide wire exposed on the front end of the wire sleeve, the wire sleeve is fixed through the first clamping part 31 in a clamping mode, the guide wire is fixed through the second clamping part 32 in a clamping mode, the guide wire and the wire sleeve are fixed through the fixing mode, the guide wire and the wire sleeve can not move relatively, and the protection effect on the power wire 2 is better.

Further, as shown in fig. 3, the first clamping portion 31 includes a first clamping ring sleeved on the outer peripheral side of the insulating portion 22, the second clamping portion 32 includes a second clamping ring sleeved on the outer peripheral side of the conducting wire, and the first clamping ring and the second clamping ring are disposed at intervals along the axial direction of the threading hole 123 and form a stop fit with the power cord 2 along the axial direction of the threading hole 123. The first clamping ring and the second clamping wire are used for limiting the power wire 2 in the circumferential direction and the axial direction, so that a better limiting effect is ensured.

The wire sleeve is characterized in that a clamping groove is further formed in the outer peripheral side of the wire sleeve, and is combined with the first half ring body 311 and the second half ring body 312 which are connected, the first half ring body 311 and the second half ring body 312 are both located in the clamping groove and are respectively clamped on two radial sides of the clamping groove, the first clamp ring is split into two parts so as to be convenient to assemble, and when the size of the wire sleeve slightly changes, the relative positions of the first half ring body 311 and the second half ring body 312 can be adjusted, so that the wire sleeve is suitable for the clamping requirements of power wires 2 with different sizes, and the applicability is better. The first half ring body 311 and the second half ring body 312 are respectively provided with the first mounting hole 35, so that the first half ring body 311 and the second half ring body 312 are respectively fixed, and the assembly is more convenient. The first half ring body 311 and the second half ring body 312 are clamped in the clamping groove, and the groove side wall of the clamping groove is used for forming a stop fit in the axial direction, so that the first clamping ring is prevented from moving relative to the wire sleeve.

Further, the second snap ring is located outside the clamping groove, and forms a stop fit with the outer sidewall of the clamping groove along the axial direction of the threading hole 123. Through the second snap ring butt in the outside of joint recess, promptly first snap ring with the second snap ring butt respectively in the both sides of the groove side wall of joint recess, make first snap ring with the second snap ring all relative the joint recess is fixed, and the counterpoint is more accurate, fixes more reliably.

It is understood that the first snap ring and the second snap ring may be integrally provided, and the corresponding second snap ring may also be composed of two half rings. Specifically, as shown in fig. 5, a first clamping protrusion 321 is protruding from one axial side of the first half ring body 311, and a second clamping protrusion 322 is protruding from one axial side of the second half ring body 312, where the first clamping protrusion 321 and the second clamping protrusion 322 are respectively clamped to two radial sides of the lead wire to form the second clamping ring in a co-encircling manner, so that the assembly of the wire clamping structure 3 and the power wire 2 is more convenient.

Furthermore, as shown in fig. 6 and 7, a positioning protrusion 33 is provided on one of the opposite surfaces of the first half ring body 311 and the second half ring body 312, and a positioning groove 34 engaged with the positioning protrusion 33 is provided on the other, and the positioning protrusion 33 and the positioning groove 34 are engaged with each other in the radial direction of the power cord 2. Through the butt-joint cooperation of the positioning protrusion 33 and the positioning groove 34, the first half ring body 311 and the second half ring body 312 can be aligned quickly, and the relative positional relationship between the two can be more stable, so that the fixing effect on the power line 2 is better.

The foregoing description is only of the preferred embodiments of the present utility model, and is not intended to limit the scope of the utility model, but is intended to cover all equivalent structures described in the specification and drawings, or any other related technical field, directly or indirectly, as would be within the scope of the utility model.

Claims (10)

1. A hair dryer, comprising:

The air blower comprises a blower body, a fan and a fan, wherein the blower body is provided with an air inlet hole, an air outlet hole and an air flow channel communicated with the air inlet hole and the air outlet hole;

a power cord having an electrical connection portion connected within the blower body and an insulating portion, at least a portion of the insulating portion being penetrable from the blower body;

The wire clamping structure is arranged in the blower main body and is clamped on the outer peripheral side of the power wire;

The air blower is characterized in that a first through hole communicated with the air flow channel is formed in the wire clamping structure, a second through hole which is suitable for communicating the outside with the first through hole is formed in the blower main body, and at least part of the wire clamping structure is located between the electric connection part and the second through hole to form a barrier.

2. The blower of claim 1, wherein the air inlet is provided at a peripheral side surface of the blower body;

The tail end of the blower main body is provided with a threading hole, the insulation part penetrates out of the threading hole, and the second through hole is arranged at the tail end of the blower main body and is positioned at the periphery side of the threading hole.

3. The blower of claim 2, wherein the wire clamping structure is annularly arranged and coaxially arranged with the threading hole, the insulating part is sleeved at the threading hole, the wire clamping structure is sleeved at the outer peripheral side of the power wire, and the first via hole is arranged on the surface of the wire clamping structure extending along the radial direction.

4. A hair dryer according to claim 3, wherein said electric connection portion includes a lead wire, said insulating portion includes a wire sleeve which is provided around an inner peripheral side of said threading hole and is wrapped around an outer peripheral side of said lead wire, and at least part of said lead wire is extendable from a front end of said wire sleeve to be connected to an inside of said hair dryer main body;

the wire clamping structure is provided with a first clamping part clamped at the outer peripheral side of the wire sleeve and a second clamping part clamped at the outer peripheral side of the front end of the wire sleeve, wherein the guide wire is exposed out of the second clamping part.

5. The blower of claim 4, wherein the first clamping portion includes a first clamping ring sleeved on an outer peripheral side of the insulating portion, the second clamping portion includes a second clamping ring sleeved on an outer peripheral side of the wire, and the first clamping ring and the second clamping ring are disposed at intervals along an axial direction of the wire through hole and form a stop fit with the power wire along the axial direction of the wire through hole.

6. The blower of claim 5, wherein the outer peripheral side of the sleeve is further provided with a clamping groove, the first clamping ring comprises a first half ring body and a second half ring body which are connected, and the first half ring body and the second half ring body are both positioned in the clamping groove and respectively clamped at two sides of the clamping groove along the radial direction of the clamping groove.

7. The blower of claim 6, wherein the second snap ring is located outside the snap groove and forms a stop fit with an outer sidewall of the snap groove along an axial direction of the threading aperture.

8. The blower of claim 6, wherein a first clamping protrusion is protruded from one axial side of the first half ring body, a second clamping protrusion is protruded from one axial side of the second half ring body, and the first clamping protrusion and the second clamping protrusion are respectively clamped on two radial sides of the conducting wire to form the second clamping ring in a co-encircling manner.

9. The blower of claim 6, wherein said first half ring body and said second half ring body have opposed surfaces, one of which has a positioning projection, and the other of which has a positioning groove in snap fit with said positioning projection, said positioning projection and said positioning groove being in snap fit with each other in a radial direction of said power cord.

10. The blower of claim 1, wherein the blower body comprises a first housing and a second housing connected, and an inner barrel disposed inside the second housing, the air outlet is disposed on the first housing, the air inlet is disposed on a peripheral side surface of the second housing, the second via is disposed on a distal end surface of the second housing, and the wire clamping structure is disposed in the second housing;

The inner cylinder is provided with a vent hole connected with the air inlet, one end of the inner cylinder is connected with the first shell and sleeved on the inner peripheral side of the second shell, and the wire clamping structure is covered on the other end of the inner cylinder.