CN218385825U

CN218385825U - Transmission assembly and split type rhinitis instrument with same

Info

Publication number: CN218385825U
Application number: CN202221566147.3U
Authority: CN
Inventors: 邬达明
Original assignee: Netop Industrial Co ltd
Current assignee: Netop Industrial Co ltd
Priority date: 2022-06-21
Filing date: 2022-06-21
Publication date: 2023-01-24
Anticipated expiration: 2032-06-21

Abstract

The application provides a transmission assembly and split type rhinitis appearance, transmission assembly include silica gel hose, connecting wire and connector, wherein: the connecting line is arranged in the silica gel hose, and the diameter of the connecting line is smaller than that of the silica gel hose, so that a communicating gap communicated with the fluid of the connectors at the two ends is formed between the connecting line and the silica gel hose; the connector comprises an inner module and an outer module arranged outside the inner module, the inner module comprises a plastic matrix, a connector pipe and a connector plug, the connector pipe and the connector plug are fixed on the plastic matrix, the connector pipe is provided with a first end and a second end, the first end of the connector pipe is exposed out of the plastic matrix, and the first end of the connector pipe is tightly inserted and matched with the silica gel hose; the two ends of the connecting wire are provided with connector lugs extending out of the silica gel hose, and the connector lugs of the connecting wire are electrically connected to the connector plug and clamped between the connector pipe and the silica gel hose which are in close splicing fit; the outer mold is integrally injected outside the inner mold, and the outer mold is coated outside the tight insertion matching section of the joint pipe and the silica gel hose in an injection molding manner.

Description

Transmission assembly and split type rhinitis instrument with same

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to transmission assembly and have its split type rhinitis appearance.

Background

Rhinitis is an inflammatory disease of the nasal cavity, and is an inflammation of the nasal mucosa caused by viruses, bacteria, allergens, various physicochemical factors and certain systemic diseases. The main pathological changes of rhinitis are congestion, swelling, exudation, hyperplasia, atrophy or necrosis of the nasal mucosa. At present, the rhinitis is treated by pharmacotherapy, phototherapy, physical massage therapy and the like. The pharmacotherapy is to spray medicine into nasal cavity for diminishing inflammation, and relieving and treating rhinitis; the phototherapy is to irradiate the nasal cavity with light with specific wavelength to promote blood circulation, relieve rhinitis symptoms and accelerate recovery; the physical massage therapy is to promote blood circulation by massage to relieve and treat rhinitis. At present, corresponding products such as a nose shining device, a rhinitis massager and the like are also available on the market for phototherapy and physical massage therapy. The function of the existing products for treating rhinitis is single, and each product can only realize one of the three therapies. There are also some developers trying to integrate multiple therapies into one product, however, the integration of multiple functions into one product increases the number of components in the product, increases the volume of the product, makes miniaturization difficult, and causes inconvenience in use.

Such a multi-functional rhinitis therapeutic instrument is disclosed promptly as utility model patent that publication number is CN215916236U, see its figure 1 and show, multi-functional rhinitis therapeutic instrument includes therapeutic instrument body (1) and two fixed columns (3) that can insert in the nasal cavity, is equipped with atomizer (6), ruddiness shaved head (4) and vibrations base (2) on fixed column (3) to can realize spraying normal saline or liquid medicine treatment, heating phototherapy and vibrations massage treatment to the nasal cavity. The electric components such as a liquid storage tank for storing physiological saline or liquid medicine, a water pump for driving the physiological saline or the liquid medicine to flow, a vibration motor for providing vibration power for a vibration base, a control circuit board for realizing the work control of the therapeutic apparatus, a battery and the like are arranged in the therapeutic apparatus body (1). Therefore, the volume of the therapeutic apparatus body (1) is increased, the weight is increased, a user needs to hold the therapeutic apparatus body (1) by hands after inserting the fixing column (3) into the nasal cavity when using the therapeutic apparatus, and once the user looses the hands, the therapeutic apparatus can fall off due to gravity; and the user can be tired when holding the arm for a long time, which brings inconvenience to the user.

There is also prior art that discloses a solution in which the therapy head body is separated from the control terminal and connected by a wire. For example, the utility model patent with publication number CN211357482U discloses a laser therapeutic apparatus with an air bag structure, which comprises a laser control terminal (12), a therapeutic head conduction assembly (11), an air drum (21) and an air bag assembly (30), wherein the laser control terminal (12) is connected with the therapeutic head conduction assembly (11) through a lead (13), and the air drum (21) is connected with the air bag assembly (30) through a conduit (22). In the prior art, the laser control terminal (12) and the treatment head conducting assembly (11) are separated and connected through the conducting wire (13), so that when the treatment head conducting assembly is used by a user, the treatment head conducting assembly (11) can be inserted into a nasal cavity, the laser control terminal (12) can be placed in an upper garment pocket or can be held in a comfortable posture, the laser control terminal (12) does not need to be held all the time, and the use of the user is facilitated. However, in this prior art, the guide wire (13) and the catheter (22) are separately provided, so that the wire and the tube are cluttered, and especially, the wire and the tube are twisted when they are long; moreover, in the prior art, if the guide wire and the catheter are arranged to be of an undetachable structure, the storage of the therapeutic apparatus is not facilitated; if wire and pipe set up detachable construction, need wire and pipe dismouting respectively when using, be unfavorable for the operation.

In view of the above, a new technical solution is needed to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

The utility model provides a transmission assembly and split type rhinitis appearance, transmission assembly can be convenient for the material and transmit simultaneously of the signal of telecommunication, and material transmission path and signal of telecommunication transmission path's switch-on respectively can be realized simultaneously in the action of once pegging graft of transmission assembly's connector.

One aspect of the present application provides a transmission assembly, which includes a silicone hose, a connection line, and connectors connected to both ends of the silicone hose and the connection line, wherein,

the connecting line is arranged in the silica gel hose, and the diameter of the connecting line is smaller than that of the silica gel hose, so that a communicating gap communicated with the fluid of the connectors at two ends is formed between the connecting line and the silica gel hose;

the connector comprises an inner module and an outer module arranged outside the inner module, the inner module comprises a plastic substrate, a connector pipe and a connector plug, the connector pipe and the connector plug are fixed on the plastic substrate, the connector pipe is provided with a first end and a second end, the first end of the connector pipe is exposed out of the plastic substrate, and the first end of the connector pipe is tightly inserted and matched with the silica gel hose;

the two ends of the connecting wire are provided with connector lugs extending out of the silica gel hose, and the connector lugs of the connecting wire are electrically connected to the connector plug and clamped between the connector pipe in close splicing fit and the silica gel hose;

the outer die piece is integrally injected outside the inner die piece, and the outer die piece is coated outside the tight splicing matching section of the joint pipe and the silica gel hose in an injection molding mode.

Optionally, the connector plug and the second end of the joint pipe are arranged in parallel, and the joint pipe and the silica gel hose are arranged just opposite to each other.

Optionally, the connecting wire comprises an insulating outer layer and a plurality of wires arranged in the insulating outer layer, and a distance is reserved between two ends of the insulating outer layer and the joint pipe inserted into the silica gel hose.

Optionally, the plurality of wires respectively have an insulating inner layer and a core wire arranged in the insulating inner layer, and the wires include a power line for transmitting power and a signal line for transmitting a communication signal.

Optionally, the adapter tube is a metal tube, and the connector plug is one of a USB type a interface, a USB type B interface, a USB type C interface, or a Lightning interface.

Optionally, the two connectors are configured identically.

This application on the other hand provides a split type rhinitis appearance, its including controlling device, treatment device and as above transmission assembly, controlling device with treatment device is last be equipped with respectively with transmission assembly's connector grafting complex interface, be equipped with control panel and driving pump in the controlling device, be equipped with in the treatment device by the executive component of control panel and driving pump drive work.

Optionally, the executive component comprises an LED lamp and an air bag, the control panel controls the LED lamp to work through the connecting line, and the driving pump conveys gas to the air bag through the silica gel hose so as to enable the air bag to expand and contract.

Optionally, the treatment device includes the treatment head that is used for inserting the nasal cavity, the treatment head includes shaft-like body, shaft-like body is inside to be the cavity setting, the LED lamp install in the front end of shaft-like body, the gasbag cover is located shaft-like body with the LED lamp outside, the LED lamp with have the air current clearance between the shaft-like body, gaseous through the hollow region of shaft-like body inside follows the air current clearance flows to in the gasbag.

Optionally, the LED lamp includes a light emitting core and a transmission bead encapsulating the light emitting core, the transmission bead is inserted into the inner side of the front end of the rod-shaped body and fixed by an interference fit or a snap structure, the inner side of the front end of the rod-shaped body is provided with a plurality of concave portions and convex portions, the circumferential side of the transmission bead abuts against the convex portions, and the air flow gap is formed between the transmission bead and the concave portions.

The transmission assembly provided by the utility model has both material transmission and electric signal transmission, and the communication gap for transmitting the fluid material is formed by the silica gel hose and the gap between the connecting wires arranged in the silica gel hose, so that the structure is simple and the manufacture is easy; and the silica gel hose and the connector pipe for material transmission, the connector lug and the connector plug for electric signal transmission are fixed by injection molding and cladding molding, so that the material transmission passage and the electric signal transmission passage can be respectively communicated by one-time plugging action of the connector of the transmission assembly, and the problem of material leakage caused by leading-out of the connector lug is avoided by injection molding and cladding molding. The utility model provides a split type rhinitis appearance has above-mentioned transmission assembly, through setting up controlling device and treatment device components of a whole that can function independently to by the transmission assembly connection that can carry out the transmission of material and signal of telecommunication simultaneously, can realize treatment device's multi-functionalization and miniaturization, and conveniently control device, treatment device and transmission assembly three between dismouting, accomodate.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.

Fig. 1 is a three-dimensional combination view of the split type rhinitis instrument of the present application.

Fig. 2 is a perspective exploded view of the split rhinitis instrument of the present application.

Fig. 3 is a perspective view of part of internal components of the control device of the split rhinitis instrument.

Fig. 4 is a perspective view of part of the internal components of the treatment device of the split rhinitis apparatus of the present application.

Fig. 5 is an enlarged view of a portion of the transfer assembly of the present application.

Fig. 6 is a cross-sectional view of a transfer assembly of the present application.

Fig. 7 is a partially enlarged view of a portion a in fig. 6.

Fig. 8 is a perspective exploded view of the treatment head of the split rhinitis instrument of the present application.

Description of reference numerals: 10-a manipulation device; 11-a lower shell; 111-rechargeable batteries; 112-driving the pump; 113-an air valve; 114-an exhaust pipe; 115-a first socket; 12-upper shell; 121-operating keys; 13-a control panel; 131-a display screen; 132-a charging interface; 14-a scaffold; 15-a sheath; 20-a treatment device; 21-lower cover; 211-LED lamp; 2111-transmission beads; 212-a rod-shaped body; 2121-a recess; 2122-a convex part; 213-a switching valve; 214-a second socket; 215-an intake pipe; 22-an upper cover; 23-rubber sleeve; 24-an air bag; 30-a transmission component; 31-a silicone hose; 32-a connector; 33-an inner mould part; 331-plastic substrate; 332-a connector plug; 333-joint pipe; 34-an outer mould part; 35-connecting lines; 351-connector lug; 301-communication gap.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present application, but are merely examples of apparatus and methods consistent with certain aspects of the present application.

A transfer assembly of the present application is described in detail below with reference to the accompanying drawings. The features in the embodiments described below may be combined with each other without conflict.

Referring to fig. 1 to 8, the present application provides a transmission assembly 30 and a split rhinitis apparatus having the same. The split rhinitis instrument comprises an operation device 10, a treatment device 20 and the transmission assembly 30.

Referring to fig. 2 and 5 to 7, the transmission assembly 30 includes a silicone hose 31, a connection line 35, and connectors 32 connected to two ends of the silicone hose 31 and the connection line 35.

Connecting wire 35 is located in the silica gel hose 31, just the diameter of connecting wire 35 is less than the diameter of silica gel hose 31 makes connecting wire 35 with form the intercommunication clearance 301 with the connector 32 fluid intercommunication at both ends department between the silica gel hose 31.

The connector 32 includes interior module 33 and locates the outer external mold member 34 of interior module 33, interior module 33 includes plastic base member 331 and is fixed in the connector 333 and the connector plug 332 of plastic base member 331, connector 333 has and exposes outward the first end and the second end of plastic base member 331, first end with the cooperation of closely pegging graft of silica gel hose 31.

The two ends of the connection line 35 are provided with connector terminals 351 extending out of the silicone tube 31, and the connector terminals 351 of the connection line 35 are electrically connected to the connector plug 332 and clamped between the adapter tube 333 and the silicone tube 31 which are tightly inserted and matched.

The outer module 34 is integrally injection-molded outside the inner module 33, and the outer module 34 is injection-molded and wrapped outside the tight-insertion-fit section of the joint pipe 333 and the silicone rubber hose 31.

The transmission assembly 30 provided by the application has both material transmission and electric signal transmission, and the communication gap 301 for transmitting the fluid material is formed by the gap between the silica gel hose 31 and the connecting line 35 arranged in the silica gel hose, so that the structure is simple and the manufacture is easy; moreover, the silicone hose 31 and the adapter 333 for material transmission, and the connector lug 351 and the connector plug 332 for electrical signal transmission are all fixed by injection molding and cladding, and because the silicone hose 31 is soft in material and easy to seal, and the secondary injection molding and cladding, the problem that the connector lug 351 generates a gap between the silicone hose 31 and the adapter 333 and causes material leakage when the silicone hose 31 is led out is further avoided.

As shown in fig. 5 to 7, the transmission assembly 30 includes two connectors 32, and the two connectors 32 are identical in structure. Therefore, the transmission assembly 30 does not need to distinguish which end is plugged in during use, and the use is convenient. The two connectors 32 are connected through the silica gel hose 31 in a fluid communication manner and are electrically connected through a connecting wire 35 arranged in the silica gel hose 31. Specifically, the joint pipes 333 on the two connectors 32 are communicated through the silica gel hose 31; the connector plugs 332 on the two connectors 32 are electrically connected by the connectors 351 at the two ends of the connecting wire 35. In this embodiment, the connecting head 32 includes an inner mold 33, and the inner mold 33 includes a plastic substrate 331, and the connector plug 332 and the connector tube 333. The connector plug 332 and the connector tube 333 may be in-molded in the plastic substrate 331. The joint tube 333 is a metal tube, two ends of which are exposed out of the plastic substrate 331, a first end of which is used for being inserted into the silica gel hose 31, and a second end of which is used for being inserted into the operation device 10 or the treatment device 20. The connector plug 332 is exposed out of the plastic substrate 331, and is arranged in parallel with the second end of the connector tube 333. The joint pipe 333 is opposite to the silicone hose 31, so that fluid can be more smoothly transmitted, and the fluid can be gas or liquid.

The connecting wire 35 comprises an insulating outer layer and a plurality of conducting wires arranged in the insulating outer layer, and a distance is reserved between two ends of the insulating outer layer and the connector pipe 333 inserted into the silica gel hose 31. The phenomenon that the fluid circulation is blocked due to the fact that the insulating outer layer of the connecting wire 35 abuts against the joint pipe 333 is avoided. Further, the plurality of wires respectively have an insulating inner layer and a core wire arranged in the insulating inner layer, and the wires comprise power lines for transmitting power and signal lines for transmitting communication signals. For example, the connector plug 332 may be one of a USB type a interface, a USB type B interface, a USB type C interface or a Lightning interface, and the corresponding number of wires and the functional configuration thereof should meet the requirements of the above-mentioned interface standards.

As shown in fig. 1 to 4, the present application further provides a split type rhinitis apparatus, which includes an operation device 10, a treatment device 20, and the transmission assembly 30, where the operation device 10 and the treatment device 20 are respectively provided with a socket that is in socket fit with the connector 32 of the transmission assembly 30, the operation device 10 is provided with a control board 13 and a driving pump 112, and the treatment device 20 is provided with an executing component that is driven by the control board 13 and the driving pump 112 to work. Optionally, the executing component includes an LED lamp 211 and an air bag 24, the control board 13 controls the operation of the LED lamp 211 through the connecting line 35, and the driving pump 112 delivers gas to the air bag 24 through the silicone hose 31 to make the air bag expand and contract. Because the communicating gap 301 for the gas to flow is formed by the gap between the connecting line 35 and the silicone hose 31, although the silicone hose 31 has a large diameter, the gap for the gas to flow is small, so the silicone hose 31 can be made of a silicone tube with a conventional size, the manufacturing difficulty and the manufacturing cost of the silicone hose 31 can be reduced, meanwhile, the gas driven by the driving pump 112 is squeezed when entering the communicating gap 301, the gas has a large pressure and a large flow rate, when being transmitted to the treatment device 20, the space is increased again, the pressure is released quickly, the expansion and contraction of the air bag 24 can be promoted well, and a good massage effect is achieved.

Referring to fig. 2 and 3, the operating device 10 includes an upper casing 12 and a lower casing 11 which are covered with each other, the upper casing 12 and the lower casing 11 enclose a box space, and a bracket 14, a control panel 13, a rechargeable battery 111, a driving pump 112, an air valve 113 and a first socket 115 are installed in the box space. The support 14 is used for installing the rechargeable battery 111 and the control panel 13, the rechargeable battery 111 is electrically connected to the control panel 13, and a charging interface 132 is arranged on the control panel 13 and used for charging the rechargeable battery 111. The first socket 115 is a socket that matches the connector plug 332 on the transmission component 30, for example, when the connector plug 332 is a male USB socket, the first socket 115 is a female USB socket. The driving pump 112 and the air valve 113 are connected to an exhaust pipe 114, the driving pump 112 is an air pump for driving air flow, the air valve 113 is used for controlling on/off of the air flow, and the exhaust pipe 114 is communicated with a joint pipe 333 of the transmission assembly 30 for transmitting the air flow to the transmission assembly. Further, the exhaust pipe 114 further has a detection end, and the detection end is connected to the detection element of the control board 13 for the detection element to detect the air pressure in the exhaust pipe 114, so as to control the conveying air flow. The upper case 12 is further provided with a key panel, and the key panel is provided with an operation key 121 for a user to operate. The control device 10 further comprises a sheath 15 sleeved outside the upper shell 12 and the lower shell 11, and the sheath 15 is a silica gel sheath and can play a role in improving hand feeling, preventing skidding and preventing falling.

Referring to fig. 2 and 4, the therapeutic device 20 includes an upper cover 22 and a lower cover 21 which are covered with each other, a switching valve 213, a second socket 214, an air inlet tube 215 are installed in the upper and lower covers, and a therapeutic head which has one end installed in the upper and lower covers and one end extended out of the upper and lower covers and is used for being inserted into the nasal cavity. The upper cover and the lower cover are also sleeved with a rubber sleeve 23, so that the hand feeling is improved, and the effects of skid resistance and falling resistance are achieved. The second socket 214 is used for plugging and matching with the connector plug 332 of the transmission assembly 30, and one end of the air inlet pipe 215 is connected to the switching valve 213, and the other end is used for plugging and matching with the connector pipe 333. The treatment head comprises a rod-shaped body 212, the interior of the rod-shaped body 212 is hollow, the rear ends of the rod-shaped body 212, which are positioned in the upper cover and the lower cover, are connected with a switching valve 213 through an air pipe, an LED lamp 211 is installed at the front end of the rod-shaped body 212, an air bag 24 is sleeved outside the rod-shaped body 212 and the LED lamp 211, an air flow gap is formed between the LED lamp 211 and the rod-shaped body 212, and air flows into the air bag 24 from the air flow gap through the hollow area in the rod-shaped body 212. In this embodiment, the air bag 24 is made of silicone, which is soft and nontoxic, and will not cause damage when contacting with the nasal cavity.

Referring to fig. 8, the LED lamp 211 includes a light emitting core and a transmission bead 2111 for enclosing the light emitting core, the transmission bead 2111 is inserted into the front end of the rod-shaped body 212 and fixed by an interference fit or a clamping structure, a plurality of concave portions 2121 and convex portions 2122 are arranged on the front end of the rod-shaped body 212, a circumferential side surface of the transmission bead 2111 abuts against the convex portions 2122, and the air flow gap is formed between the transmission bead and the concave portions 2121. Preferably, the recesses 2121 and the protrusions 2122 are arranged in a uniform and alternating manner, so that the air flow enters the air bag 24 from the recesses 2121 in a balanced manner, and the head of the air bag 24 is inflated uniformly in the circumferential direction.

As can be seen from the above description of the specific embodiments, the transmission assembly 30 provided by the present invention has both material transmission and electrical signal transmission, and the communication gap 301 for transmitting the fluid material is formed by the gap between the silicone hose 31 and the connecting wire 35 installed therein, which is simple in structure and easy to manufacture; moreover, the silicone hose 31 and the adapter tube 333 for material transmission, and the connector lug 351 and the connector plug 332 for electrical signal transmission are all fixed by injection molding and cladding molding, so that the respective connection of the material transmission path and the electrical signal transmission path can be simultaneously realized by one-time plugging action of the connector 32 of the transmission assembly 30, and the problem of material leakage caused by the leading-out of the connector lug 351 is avoided by injection molding and cladding molding. The utility model provides a split type rhinitis appearance has above-mentioned transmission assembly, through setting up controlling device and treatment device components of a whole that can function independently for the part of controlling and the part that is used for driving the material transmission can set up in controlling device, carries out the transmission of material and signal of telecommunication by transmission assembly, can realize treatment device's multi-functionalization and miniaturization, and make things convenient for dismouting, accomodating between controlling device, treatment device and transmission assembly three.

Although the present application has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the application, and all changes, substitutions and alterations that fall within the spirit and scope of the application are to be understood as being covered by the following claims.

Claims

1. The utility model provides a transmission assembly, includes silica gel hose, connecting wire and connect in the silica gel hose with the connector of the both ends department of connecting wire, its characterized in that:

2. The transfer assembly of claim 1, wherein the connector plug is juxtaposed with a second end of the adapter tube, the adapter tube being disposed opposite the silicone hose.

3. The transmission assembly of claim 1, wherein the connection line includes an insulating outer layer and a plurality of wires disposed within the insulating outer layer, the insulating outer layer having ends spaced from a connector tube inserted into the silicone hose.

4. The transmission assembly of claim 3, wherein the plurality of wires each have an insulating inner layer and a core wire disposed within the insulating inner layer, the wires including a power wire for transmitting power and a signal wire for transmitting communication signals.

5. The transfer assembly of claim 4, wherein the adapter tube is a metal tube and the connector plug is one of a USB type A port, a USB type B port, a USB type C port, or a Lightning port.

6. A transfer assembly according to claim 1 wherein the two connectors are identically configured.

7. A split rhinitis instrument, comprising an operation device, a treatment device and a transmission assembly as claimed in any one of claims 1 to 6, wherein the operation device and the treatment device are respectively provided with a socket matched with the connector of the transmission assembly in a plugging manner, a control panel and a driving pump are arranged in the operation device, and an execution component driven by the control panel and the driving pump to work is arranged in the treatment device.

8. The split type rhinitis instrument according to claim 7, wherein the actuating member comprises an LED lamp and an air bag, the control board controls the LED lamp to work through the connecting wire, and the driving pump conveys air to the air bag through the silica gel hose so as to enable the air bag to expand and contract.

9. The split-type rhinitis instrument according to claim 8, wherein the therapeutic device comprises a therapeutic head for inserting into a nasal cavity, the therapeutic head comprises a rod-shaped body, the rod-shaped body is hollow, the LED lamp is mounted at the front end of the rod-shaped body, the air bag is sleeved outside the rod-shaped body and the LED lamp, an air flow gap is formed between the LED lamp and the rod-shaped body, and air flows from the air flow gap into the air bag through the hollow area inside the rod-shaped body.

10. The split type rhinitis instrument according to claim 9, wherein the LED lamp includes a light emitting core and a transmissive bead encapsulating the light emitting core, the transmissive bead is inserted into the inner side of the front end of the rod-shaped body and fixed by an interference fit or a snap-fit structure, the inner side of the front end of the rod-shaped body is provided with a plurality of concave portions and convex portions, the circumferential side surface of the transmissive bead abuts against the convex portions, and the air flow gap is formed between the circumferential side surface of the transmissive bead and the concave portions.