CN219610915U

CN219610915U - Charging connector

Info

Publication number: CN219610915U
Application number: CN202321267011.7U
Authority: CN
Inventors: 陈金柱; 陈彦君
Original assignee: Foshan Dingnengdao Technology Co ltd
Current assignee: Foshan Dingnengdao Technology Co ltd
Priority date: 2023-05-23
Filing date: 2023-05-23
Publication date: 2023-08-29
Anticipated expiration: 2033-05-23

Abstract

The utility model discloses a charging connector, which comprises a shell, wherein the bottom and the top of the shell are respectively provided with a connecting pin and a charging interface, a control unit, a lighting unit, an interaction unit and an instruction receiving unit are arranged in the shell, a light-transmitting strip is arranged on the outer periphery of the top of the shell, and the lighting unit is positioned on the inner side of the light-transmitting strip; the instruction receiving unit is used for receiving a control instruction input by a user and transmitting the control instruction to the control unit, and the interaction unit is used for outputting the control instruction fed back by the control unit; the connecting pin, the charging interface, the lighting unit, the interaction unit and the instruction receiving unit are respectively and electrically connected with the control unit; the charging connector disclosed by the utility model comprises the lighting unit arranged in the light transmission strip, so that the lighting function can be realized, the charging connector can be used as a small night lamp, the charging behavior is convenient, and the use experience of a user is improved; and possess interactive unit and instruction receiving unit, richened the service function of charging connector.

Description

Charging connector

Technical Field

The utility model relates to the technical field of charging heads, in particular to a charging connector.

Background

The charging connector, also called a charger, generally refers to a device for converting alternating current into low-voltage direct current, and specifically, the charging connector is a static converter device for converting alternating current with constant voltage and frequency into direct current by adopting a power electronic semiconductor device; the charging connector is widely applied to charging of common electric equipment such as mobile phones, cameras and the like.

The existing charging connector only has the function of charging electric equipment generally, and has the problem of single function; since the charging behavior of most electronic products is generally performed at night, when the charging behavior is performed in a night light-off environment, the problem that the charging jack is difficult to find easily occurs, and the use experience of users is reduced.

It can be seen that there is a need for improvements and improvements in the art.

Disclosure of Invention

In view of the shortcomings of the prior art, the utility model aims to provide a charging connector which has a lighting function, is convenient for night charging and improves the use experience of users.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the charging connector comprises a shell, wherein connecting pins and a charging interface are respectively arranged at the bottom and the top of the shell, a control unit, a lighting unit, an interaction unit and an instruction receiving unit are arranged in the shell, a light transmission strip is arranged on the outer periphery of the top of the shell, and the lighting unit is positioned on the inner side of the light transmission strip; the instruction receiving unit is used for receiving a control instruction input by a user and transmitting the control instruction to the control unit, and the interaction unit is used for outputting the control instruction fed back by the control unit; the connecting pin, the charging interface, the lighting unit, the interaction unit and the instruction receiving unit are respectively and electrically connected with the control unit.

In the charging connector, the interaction unit comprises a wireless communication part, an infrared receiving part and an infrared transmitting part which are respectively and electrically connected with the control unit, wherein the wireless communication part is used for realizing wireless communication of the control unit, the infrared receiving part is used for receiving infrared signals fed back from outside, and the infrared transmitting part is used for outputting control instructions fed back by the control unit in an infrared signal mode.

In the charging connector, the control unit comprises an L-shaped control board, and the charging interface, the lighting unit, the interaction unit and the instruction receiving unit are respectively arranged on the horizontal part of the L-shaped control board; the connecting pin is connected with the vertical part of the L-shaped control board.

In the charging connector, the infrared emission part comprises five infrared emission tubes arranged on the horizontal part of the L-shaped control plate, the emission direction of any one of the infrared emission tubes faces the top of the shell, and the emission directions of the other four infrared emission tubes face the periphery of the shell respectively; the infrared receiving part comprises an infrared receiving tube arranged on the horizontal part of the L-shaped control panel, and the receiving direction of the infrared receiving tube faces to the top of the shell; the wireless communication part comprises a wireless communication chip arranged on the horizontal part of the L-shaped control board.

In the charging connector, a connecting groove is formed in the horizontal part of the L-shaped control board, a connecting block is arranged on the vertical part of the L-shaped control board and is connected with the connecting groove in a matched mode, and a contact is arranged on the connecting block and is electrically connected with the horizontal part of the L-shaped control board and the vertical part of the L-shaped control board respectively; the top of casing has seted up the mounting groove, the interface that charges with the mounting groove cooperation is connected.

In the charging connector, two metal connecting clamps are arranged on the vertical part of the L-shaped control board, each connecting pin comprises two connecting pins, one end of each connecting pin is located outside the shell, and the other ends of the two connecting pins are respectively connected with the two metal connecting clamps in a matched mode.

In the charging connector, the instruction receiving unit comprises a sound receiving device and a broadcasting device which are respectively arranged on the horizontal part of the L-shaped control board, one or more through holes are formed in the top of the shell, and the sound receiving device and the broadcasting device are respectively arranged on the inner sides of the through holes; the sound receiving device is used for receiving voice instructions, and the broadcasting device is used for outputting control instructions fed back by the control unit in a voice mode.

In the charging connector, a positioning seat is arranged in the shell, a positioning block is arranged at the top of the positioning seat, a positioning groove is formed in the horizontal part of the L-shaped control board, the positioning block is connected with the positioning groove in a matched mode, and the positioning groove is located at the front side of the broadcasting device.

In the charging connector, a first friction block is arranged on the positioning seat, second friction blocks are respectively arranged inside two sides of the shell, the first friction blocks are in butt joint with the bottom of the horizontal part of the L-shaped control board, and the two second friction blocks are respectively connected with two sides of the vertical part of the L-shaped control board in a matched mode.

In the charging connector, the lighting unit comprises a plurality of LED lamp beads, and the LED lamp beads are circumferentially and uniformly arranged on the horizontal part of the L-shaped control board.

The beneficial effects are that:

the utility model provides a charging connector, which comprises a lighting unit arranged in a light-transmitting strip, wherein the lighting unit can realize a lighting function, so that the charging connector can be used as a small night lamp, is convenient for charging or other night starting at night, and improves the use experience of a user; the intelligent charging connector has the advantages that the intelligent charging connector is provided with the interaction unit and the instruction receiving unit, the instructions sent by a user can be received, the working states of other devices can be correspondingly adjusted, namely, the third party interaction control is realized, the use functions of the charging connector are enriched, and the use flexibility of the charging connector is improved.

Drawings

Fig. 1 is a schematic structural diagram of a charging connector provided by the present utility model;

fig. 2 is a schematic diagram of an internal structure of a charging connector according to the present utility model;

fig. 3 is a schematic structural diagram of an L-shaped control board according to the present utility model;

fig. 4 is a system configuration diagram of a charging connector provided by the present utility model.

Description of main reference numerals: 1-shell, 11-base, 111-locating piece, 112-first friction block, 113-second friction block, 12-closing cap, 121-light strip, 122-through-hole, 13-connecting pin, 14-louvre, 2-interface that charges, 3-control unit, 31-L control panel, 32-connecting block, 33-metal connecting clamp, 4-instruction receiving unit, 41-radio device, 42-broadcasting device, 5-interactive unit, 51-infrared transmitting tube, 52-infrared receiving tube, 6-lighting unit, 61-LED lamp pearl.

Detailed Description

The utility model provides a charging connector, which is used for making the purpose, technical scheme and effect of the utility model clearer and more definite, and the utility model is further described in detail below by referring to the accompanying drawings and examples.

In the description of the present utility model, it should be understood that the azimuth or positional relationship indicated by the terms "top", "bottom", "front", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of description of the present utility model and for simplification of the description, and are not to be construed as limiting the present utility model; furthermore, the terms "mounted," "connected," and the like, are to be construed broadly and, as appropriate, the specific meaning of the terms in the present utility model will be understood by those of ordinary skill in the art.

Referring to fig. 1 to 4, the present utility model provides a charging connector, which comprises a housing 1, wherein a connection pin 13 and a charging interface 2 are respectively disposed at the bottom and the top of the housing 1, a control unit 3, a lighting unit 6, an interaction unit 5 and a command receiving unit 4 are disposed in the housing 1, a light-transmitting strip 121 is disposed on the outer periphery of the top of the housing 1, and the lighting unit 6 is located at the inner side of the light-transmitting strip 121; the instruction receiving unit 4 is used for receiving a control instruction input by a user and transmitting the control instruction to the control unit 3, and the interaction unit 5 is used for outputting the control instruction fed back by the control unit 3; the connection pin 13, the charging interface 2, the lighting unit 6, the interaction unit 5 and the instruction receiving unit 4 are respectively and electrically connected with the control unit 3.

The charging connector disclosed by the utility model comprises the lighting unit 6 arranged in the light-transmitting strip 121, so that the lighting function can be realized, the charging connector can be used as a small night lamp, the charging behavior or other night behaviors can be conveniently carried out at night, and the use experience of a user is improved; in addition, the charging connector further comprises an interaction unit 5 and an instruction receiving unit 4, the instruction receiving unit 4 receives instructions sent by a user, and after the instructions are adjusted by the control unit 3, the working states of other devices are controlled and adjusted through the interaction unit 5, namely, interaction control of a third party is realized, the use function of the charging connector is enriched, the use flexibility of the charging connector is improved, and the use experience of the user is further improved.

In this embodiment, the housing 1 includes a base 11 and a cover 12, the cover 12 includes a top plate and the light-transmitting strip 121 surrounding the top plate, and the control unit 3, the lighting unit 6, the interaction unit 5 and the instruction receiving unit 4 are respectively disposed in the base 11; the base 11 can be detachably connected with the sealing cover 12, so that each unit in the base 11 can be conveniently maintained; specifically, the base 11 may be screwed or engaged with the cover 12, and when the base 11 is screwed with the cover 12, an external thread is provided at the bottom of the cover 12, an internal thread is provided at the top of the inner wall of the base 11, and the external thread is screwed with the internal thread; when the base 11 is in clamping connection with the sealing cover 12, a clamping groove is formed in the top of the base 11, a clamping block is arranged at the bottom of the sealing cover 12, and the clamping groove is in clamping connection with the clamping block; in this embodiment, the light-transmitting strip 121 is made of a light-transmitting material, the top plate is glued to the light-transmitting strip 121, and a light-transmitting portion is disposed in the middle of the top plate, so that the interaction unit 5 can perform the interaction control of a third party normally.

Further, in this embodiment, the sealing ring is disposed at the connection position between the base 11 and the cover 12, so as to improve the connection tightness between the base 11 and the cover 12, and prevent water vapor or dust from entering the base 11 through the connection gap between the base 11 and the cover 12, thereby preventing the water vapor or dust from affecting the normal operation of the control unit 3, and improving the stability and reliability of the charging connector during operation.

Further, referring to fig. 3 and 4, the interaction unit 5 includes a wireless communication portion, an infrared receiving portion and an infrared transmitting portion, which are electrically connected with the control unit 3, respectively, where the wireless communication portion is used to implement wireless communication of the control unit 3, the infrared receiving portion is used to receive an infrared signal fed back from the outside, and the infrared transmitting portion is used to output a control instruction fed back by the control unit 3 in the form of an infrared signal.

In the embodiment, before the charging connector controls the household equipment, the infrared receiving part receives the infrared signal of the remote controller corresponding to the household equipment, so that the charging connector is matched with the remote controller, namely the charging connector is matched with the household equipment; when a user feeds back a control instruction through the instruction receiving unit 4, the control unit 3 feeds back the processed control instruction to the infrared emission part, and the infrared emission part sends infrared signals to control and adjust the working state of the matched household equipment, so that the use flexibility of the charging connector is improved; the household equipment can receive infrared instructions, such as an air conditioner, a television, a fan and the like.

In this embodiment, the wireless communication unit is further included, which can realize a networking function and a wireless communication function of the charging connector, that is, realize connection between the charging connector and the gateway or connection between the charging connector and mobile devices such as a mobile phone and a tablet, and further, the control unit 3 can also control and adjust the working state of the matched household devices through the wireless communication unit, where the household devices are household devices capable of realizing the networking function, such as a heaven cat fairy, a little college, and the like; the wireless communication unit comprises a wireless communication chip, and the wireless communication chip can be a Bluetooth chip or a WIFI chip.

Further, referring to fig. 3 and 4, the control unit 3 includes an L-shaped control board 31, and the charging interface 2, the lighting unit 6, the interaction unit 5 and the instruction receiving unit 4 are respectively disposed on a horizontal portion of the L-shaped control board 31; the connection pin 13 is connected to the vertical portion of the L-shaped control board 31.

In this embodiment, a control chip is disposed on the horizontal portion of the L-shaped control board 31, and the model of the control chip is dy2101, and the charging interface 2, the lighting unit 6, the interaction unit 5, the instruction receiving unit 4, and the connection pins 13 are electrically connected with the control chip respectively.

Further, referring to fig. 3, the infrared emission part includes five infrared emission tubes 51 disposed on a horizontal portion of the L-shaped control board 31, wherein an emission direction of any one of the infrared emission tubes 51 faces a top of the housing 1, and an emission direction of the other four infrared emission tubes 51 faces a periphery of the housing 1 respectively; the infrared receiving part comprises an infrared receiving tube 52 arranged on the horizontal part of the L-shaped control board 31, and the receiving direction of the infrared receiving tube 52 faces to the top of the shell 1; the wireless communication part includes a wireless communication chip disposed on the horizontal part of the L-shaped control board 31.

In this embodiment, the contact pin of the infrared transmitting tube 51, the contact pin of the infrared receiving tube 52 and the contact pin of the wireless communication chip are electrically connected with the L-shaped control board 31 respectively; in order to further improve the stability of the infrared emitting part and the infrared receiving part during operation, the infrared emitting tube 51 and the infrared receiving tube 52 are respectively glued to the L-shaped control board 31.

The charging connector is generally horizontal to the ground after being connected with the socket, namely the top of the charging connector disclosed by the utility model is generally oriented to a user when in actual work; the five infrared transmitting tubes 51 facing the top and the periphery of the charging connector are arranged, so that the household equipment at each position can be ensured to receive the infrared instructions sent by the charging connector, the charging connector can be ensured to normally adjust the working state of the household equipment, and the stability and the reliability of the charging connector in working are improved; and the infrared receiving tube 52 facing the top of the charging connector is arranged, so that the charging connector can be ensured to effectively receive the infrared instruction fed back by the infrared remote controller, namely, the normal operation of matching operation is ensured, and the use experience of a user is improved.

Further, referring to fig. 3, a connection slot is formed in a horizontal portion of the L-shaped control board 31, a connection block 32 is disposed on a vertical portion of the L-shaped control board 31, the connection block 32 is connected with the connection slot in a matching manner, and contacts are disposed on the connection block 32 and are respectively electrically connected with the horizontal portion of the L-shaped control board 31 and the vertical portion of the L-shaped control board 31; the top of casing 1 has seted up the mounting groove, charging interface 2 with the mounting groove cooperation is connected.

In this embodiment, the connection block 32 is integrally formed with the L-shaped control board 31; the connection block 32 and the contact are metal contacts, and through the metal contacts, the electrical connection between the electrical elements on the horizontal part of the L-shaped control board 31 and the electrical elements on the vertical part of the L-shaped control board 31 is realized, so that the control unit 3 is ensured to work normally.

Further, referring to fig. 1 to 3, two metal connection clips 33 are disposed on the vertical portion of the L-shaped control board 31, the connection pins 13 include two connection pins 13, one ends of the two connection pins 13 are located outside the housing 1, and the other ends of the two connection pins 13 are respectively connected with the two metal connection clips 33 in a matching manner.

In this embodiment, the metal connecting clip 33 is a metal clip, and the metal clip is electrically connected with the electrical element on the L-shaped control board 31, so as to electrically connect the utility power with the L-shaped control board 31; the metal snap ring is arranged to wrap the other end of the connecting pin 13, so that the connection stability of the connecting pin 13 and the L-shaped control board 31 is improved, and the stability and the reliability of the charging connector during working are improved.

In this embodiment, two fixing seats are disposed on the inner side of the bottom of the housing 1, and the two fixing seats are respectively connected with two connecting pins 13 in a matched manner, so that the connecting pins 13 can be further wrapped, the possibility of displacement problems of the connecting pins 13 is reduced, the possibility of bending problems of the connecting pins 13 can be reduced, and the service life of the connecting pins 13 is prolonged.

Further, referring to fig. 1, 3 and 4, the instruction receiving unit 4 includes a sound receiving device 41 and a broadcasting device 42 respectively disposed on a horizontal portion of the L-shaped control board 31, one or more through holes 122 are formed in a top of the housing 1, the sound receiving device 41 and the broadcasting device 42 are respectively disposed on an inner side of the through holes 122, and the through holes 122 are used for receiving sound and broadcasting; the sound receiving device 41 is used for receiving voice instructions, and the broadcasting device 42 is used for outputting control instructions fed back by the control unit 3 in a voice form; in this embodiment, the radio device 41 and the broadcasting device 42 cooperate to realize man-machine voice interaction between the user and the charging connector; the radio device 41 is a microphone, and the broadcasting device 42 is a loudspeaker.

In this embodiment, the matching between the charging connector and the home device may also be achieved through the radio device 41, specifically, the user inputs the brand and model of the home device to be matched through voice, so as to achieve the matching between the charging head and the home device, and after the matching is completed, the charging connector may adjust the working state of the home device; the broadcasting device 42 feeds back the matching state of the household equipment or the control state of the household equipment through voice information, namely feeds back the working state of the charging connector, the information feedback is visual and clear, and the use experience of a user is improved.

In other embodiments, the instruction receiving unit 4 may further include a plurality of control buttons disposed on the housing 1, so that a user can implement input of a control instruction by pressing any control button in a short time, pressing any control button in a long time, pressing any two buttons in a combination manner, and the like, thereby improving flexibility of the charging connector during working.

Further, referring to fig. 1 and 2, the side wall of the housing 1 is further provided with one or more heat dissipation holes 14, and the heat dissipation holes 14 are used for realizing the working heat dissipation of the control unit 3, avoiding the overheat problem when the control unit 3 works, and improving the stability and safety of the charging connector when working.

Further, referring to fig. 2, a positioning seat is disposed in the housing 1, a positioning block 111 is disposed at the top of the positioning seat, a positioning slot is disposed on the horizontal portion of the L-shaped control board 31, the positioning block 111 is cooperatively connected with the positioning slot, and the positioning slot is located at the front side of the broadcasting device 42; in this embodiment, the positioning seat is integrally formed with the housing 1, and the positioning block 111 is integrally formed with the positioning seat.

In this embodiment, the positioning block 111 is connected with the positioning slot in a matching manner, so as to realize rapid positioning and installation of the L-shaped control board 31 for foolproof design, and ensure that the installed sound receiving device 41 and the broadcasting device 42 are located below the through hole 122, thereby ensuring that the voice information of the broadcasting device 42 is normally output, ensuring that the sound receiving device 41 receives sound normally, and improving the stability of the charging connector during operation.

Further, referring to fig. 2, a first friction block 112 is disposed on the positioning seat, second friction blocks 113 are respectively disposed inside two sides of the housing 1, the first friction block 112 abuts against the bottom of the horizontal portion of the L-shaped control board 31, and the two second friction blocks 113 are respectively connected with two sides of the vertical portion of the L-shaped control board 31 in a matching manner; in this embodiment, the first friction block 112 and the second friction block 113 are made of sponge, the first friction block 112 is glued to the positioning seat, and the second friction block 113 is glued to the inner wall of the housing 1.

In this embodiment, the first friction blocks 112 include 4 blocks, and the 4 blocks of the first friction blocks 112 are respectively abutted against four sides of the horizontal portion of the L-shaped control plate 31; the second friction blocks 113 are L-shaped friction blocks, and the L-shaped friction blocks wrap two sides of the vertical part of the L-shaped control plate 31 respectively; the first friction block 112 and the second friction block 113 are arranged, so that the probability of abrasion problem between the L-shaped control plate 31 and the shell 1 can be reduced, and the service life of the L-shaped control plate 31 can be prolonged; and the probability of displacement problem of the L-shaped control board 31 in the use process can be reduced, and the stability and reliability of the charging connector in operation can be improved.

Further, referring to fig. 3, the lighting unit 6 includes a plurality of LED beads 61, and the plurality of LED beads 61 are circumferentially and uniformly arranged on the horizontal portion of the L-shaped control board 31; in this embodiment, 8 LED lamp beads 61 are disposed on the horizontal portion of the L-shaped control board 31, two LED lamp beads 61 are disposed on four sides of the L-shaped control board 31 respectively, so that the light emitting uniformity of the charging connector can be improved, that is, the charging connector can realize circumferential illumination, the illumination effect of the charging connector is improved, and the use experience of a user is improved.

It will be understood that equivalents and modifications will occur to those skilled in the art based on the present utility model and its spirit, and all such modifications and substitutions are intended to be included within the scope of the present utility model.

Claims

1. The charging connector comprises a shell, wherein a connecting pin and a charging interface are respectively arranged at the bottom and the top of the shell, and the charging connector is characterized in that a control unit, a lighting unit, an interaction unit and an instruction receiving unit are arranged in the shell, a light-transmitting strip is arranged on the outer periphery of the top of the shell, and the lighting unit is positioned on the inner side of the light-transmitting strip; the instruction receiving unit is used for receiving a control instruction input by a user and transmitting the control instruction to the control unit, and the interaction unit is used for outputting the control instruction fed back by the control unit; the connecting pin, the charging interface, the lighting unit, the interaction unit and the instruction receiving unit are respectively and electrically connected with the control unit.

2. The charging connector according to claim 1, wherein the interaction unit comprises a wireless communication part, an infrared receiving part and an infrared transmitting part, wherein the wireless communication part, the infrared receiving part and the infrared transmitting part are respectively electrically connected with the control unit, the wireless communication part is used for realizing wireless communication of the control unit, the infrared receiving part is used for receiving infrared signals fed back from outside, and the infrared transmitting part is used for outputting control instructions fed back by the control unit in the form of infrared signals.

3. The charging connector according to claim 2, wherein the control unit comprises an L-shaped control board, and the charging interface, the lighting unit, the interaction unit and the instruction receiving unit are respectively disposed on a horizontal portion of the L-shaped control board; the connecting pin is connected with the vertical part of the L-shaped control board.

4. A charging connector according to claim 3, wherein the infrared emission part comprises five infrared emission tubes arranged on the horizontal part of the L-shaped control board, the emission direction of any one of the infrared emission tubes faces the top of the housing, and the emission directions of the other four infrared emission tubes face the periphery of the housing respectively; the infrared receiving part comprises an infrared receiving tube arranged on the horizontal part of the L-shaped control panel, and the receiving direction of the infrared receiving tube faces to the top of the shell; the wireless communication part comprises a wireless communication chip arranged on the horizontal part of the L-shaped control board.

5. A charging connector according to claim 3, wherein a connecting groove is formed in a horizontal portion of the L-shaped control board, a connecting block is arranged on a vertical portion of the L-shaped control board, the connecting block is connected with the connecting groove in a matching manner, and a contact is arranged on the connecting block and is electrically connected with the horizontal portion of the L-shaped control board and the vertical portion of the L-shaped control board respectively; the top of casing has seted up the mounting groove, the interface that charges with the mounting groove cooperation is connected.

6. A charging connector according to claim 3, wherein two metal connecting clips are provided on the vertical portion of the L-shaped control board, the connecting pins include two connecting pins, one ends of the two connecting pins are located outside the housing, and the other ends of the two connecting pins are respectively connected with the two metal connecting clips in a matching manner.

7. A charging connector according to claim 3, wherein the instruction receiving unit comprises a sound receiving device and a broadcasting device which are respectively arranged on the horizontal part of the L-shaped control board, one or more through holes are formed in the top of the shell, and the sound receiving device and the broadcasting device are respectively arranged on the inner sides of the through holes; the sound receiving device is used for receiving voice instructions, and the broadcasting device is used for outputting control instructions fed back by the control unit in a voice mode.

8. The charging connector according to claim 7, wherein a positioning seat is arranged in the housing, a positioning block is arranged at the top of the positioning seat, a positioning groove is formed in the horizontal portion of the L-shaped control board, the positioning block is connected with the positioning groove in a matched manner, and the positioning groove is located at the front side of the broadcasting device.

9. The charging connector according to claim 8, wherein a first friction block is arranged on the positioning seat, second friction blocks are respectively arranged inside two sides of the shell, the first friction block is abutted to the bottom of the horizontal portion of the L-shaped control plate, and the two second friction blocks are respectively connected with two sides of the vertical portion of the L-shaped control plate in a matched mode.

10. A charging connector according to claim 3, wherein the lighting unit comprises a plurality of LED beads circumferentially uniformly disposed on the horizontal portion of the L-shaped control board.