CN213753364U - Connector and connecting structure - Google Patents

Abstract

The utility model discloses a connector and a connecting structure, wherein the connector is used for splicing at least two modules so as to realize the electric connection between the modules; each module is provided with a plug-in end, and the end face of each plug-in end is provided with an electric connection terminal; the connector comprises a body and at least two wiring terminals corresponding to the electric terminals; the body is provided with an inserting cavity and an accommodating cavity communicated with the inserting cavity corresponding to each inserting end; the inserting cavity is used for inserting the corresponding inserting end, and each wiring terminal is positioned in the accommodating cavity and electrically connected with the accommodating cavity; when each plug-in end is plugged in place with the corresponding plug-in cavity, each wiring terminal is plugged and matched with the corresponding electric connection terminal to realize electric connection.

Description

Connector and connecting structure

Technical Field

The utility model relates to a lamps and lanterns field, concretely relates to connector and connection structure.

Background

With the development of society, the higher demand of people can be met by expanding and splicing a plurality of lamps, but the plurality of lamps are spliced together, so that an assembling process of splicing the lamps after manual wiring is needed exists, the manual wiring is often needed by professionals, and a wiring process is complicated, so that a user cannot assemble a plurality of lamp units completely, and the operation is difficult.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the above-mentioned defect or problem that exist among the background art, provide a connector and connection structure, wherein the connector is used for supplying two at least lamps and lanterns to peg graft to realize the electricity between the lamps and lanterns and connect, it need not manual wiring, and the operation is convenient, and the wire rod is not twined, does not expose, safe and reliable.

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

a connector is used for at least two modules to be plugged so as to realize the electrical connection between the modules; each module is provided with a plug-in end, and the end face of each plug-in end is provided with an electric connection terminal; the connector comprises a body and at least two wiring terminals corresponding to the electric terminals; the body is provided with an inserting cavity and an accommodating cavity communicated with the inserting cavity corresponding to each inserting end; the inserting cavity is used for inserting the corresponding inserting end, and each wiring terminal is positioned in the accommodating cavity and electrically connected with the accommodating cavity; when each plug-in end is plugged in place with the corresponding plug-in cavity, each wiring terminal is plugged and matched with the corresponding electric connection terminal to realize electric connection.

Furthermore, each of the power connection terminals is provided with a first magnetic attraction piece, and each of the power connection terminals is provided with a second magnetic attraction piece which corresponds to the first magnetic attraction piece and is in magnetic attraction fit with the first magnetic attraction piece.

Furthermore, each inserting end is also provided with a first fastening part; the body is also provided with a first fastening cavity corresponding to the fastening part; and each first fastening part is tightly matched with the corresponding first fastening cavity to form the detachable connection relationship between the connector and each module.

A connection structure comprising at least two modules and a connector as described above.

Furthermore, each module is a lamp, and each lamp respectively comprises a connecting seat, a shell and a circuit board arranged in the shell; the connecting seat comprises a second fastening part and the inserting end, the second fastening part extends along the end face vertical to the inserting end and is arranged opposite to the first fastening part, and the electric connection terminal of the inserting end is also connected with the circuit board in the same shell through a lead; the shell is provided with a second fastening cavity for the second fastening part to be inserted and matched; the second fastening part is tightly matched with the second fastening cavity to form that the connecting seat is detachably connected with the shell, and the inserting end is positioned outside the shell.

Further, the number of the lamps is two; the plugging cavity is arranged at two ends of the connector; when the inserting end of each lamp is inserted in place with the corresponding inserting cavity, the outer surfaces of the connector and the 2 lamps are flush.

Further, the device also comprises a power supply module, a first cylinder and a second cylinder; the shell is provided with a through hole; an upper magnetic attraction connection terminal is arranged on a power line of the power module and extends out of the outer surface of the cylinder bottom of the first cylinder body and is fixed; a lower magnetic attraction terminal corresponding to the upper magnetic attraction terminal is arranged on a circuit of one of the circuit boards and extends into the second cylinder from the outer surface of the bottom wall of the second cylinder and is fixed; the second cylinder is fixed in the through hole in a threaded manner and sleeved with the first cylinder; the lamp comprises a first barrel, a second barrel and a power module, wherein the first barrel and the second barrel are connected in a rotating clamping mode, when the clamping mode is in place, the upper magnetic attraction terminal and the lower magnetic attraction terminal are matched in a magnetic attraction mode, and the power module supplies power to the lamp.

Furthermore, a clamping block radially extends from the outer wall of the first cylinder; the cylinder wall of the second cylinder body is provided with convex seats at intervals, the fixture blocks are inserted between the plane where the convex seats are located and the bottom of the cylinder through the intervals and are rotated to be abutted against the convex seats, and the clamping relation between the first cylinder body and the second cylinder body is achieved.

Furthermore, the end face of the convex seat abutted to the convex block is also provided with a groove, and the fixture block continues to rotate in the radial direction along the same direction until the convex block is clamped into the groove.

The power cord connector further comprises a spiral cover cap which is fixedly connected with the first cylinder in a threaded manner, is used for covering the hole edge of the through hole and is provided with a through hole for the power cord to penetrate through; when the first barrel and the second barrel are clamped into place, the upper surface of the screw cap is configured to be flush with the outer surface of the housing.

As can be seen from the above description of the present invention, compared with the prior art, the present invention has the following advantages:

1. the connector is used as a bridging piece among a plurality of modules, wherein each module is provided with an inserting end, the inserting end is provided with an electric terminal, and the connector is provided with an inserting cavity and an electric terminal; through the insertion matching of the insertion end and the insertion cavity, the connection of the wiring terminal and the corresponding electric terminal can be realized. Therefore, a user only needs to plug the modules and the connector in place, the connection terminal can be connected with the power connection terminal in a butt joint mode, electric connection among the modules is conducted, manual wiring is not needed, the smoothness and convenient operation of assembly and disassembly of the modules are improved, and wires are not wound, exposed, safe and reliable.

2. The connector in this application, electrical connection terminal and binding post are equipped with respectively but magnetism inhale first magnetism spare and the second magnetism spare of connecting, through the cooperation is inhaled with magnetism of second magnetism to first magnetism, can realize binding post and electrical connection terminal automatic absorption and reach the purpose that is connected with quick electricity.

3. The connector in this application, through the fastening cooperation in first fastening portion and first fastening chamber, realize being connected dismantled of connector and each module.

4. The connection structure in the present application inherits all the advantages of the above-described connector.

5. Connection structure in this application can dismantle with the shell through setting up the connecting seat and be connected, reduces the manufacturing degree of difficulty of lamps and lanterns accessory in the industry.

6. Connection structure in this application, 2 lamps and lanterns pass through the connector concatenation back, and the three surface is neat, and its aesthetic property is good, forms whole unanimous section bar technology, improves the competitiveness.

7. In the connection structure in this application, power module is equipped with magnetism and inhales the electrical terminal, and circuit module is equipped with and inhales the electrical terminal corresponding last magnetism down to realize power input magnetism through rotatory joint and inhale and pair connection scheme.

8. The screw cap is arranged, so that the whole appearance is better.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required 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 some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic diagram of lamp groups spliced according to the present embodiment;

FIG. 2 is an exploded view of the connection structure of the present embodiment;

FIG. 3 is a schematic view of the connector housing of the present embodiment without electrical terminals;

FIG. 4 is a schematic view of a lamp structure according to the present embodiment;

FIG. 5 is a schematic structural diagram of the connector of the present embodiment;

FIG. 6 is a schematic front view of the connector of the present embodiment;

FIG. 7 is a bottom view of the connector of the present embodiment;

FIG. 8 is a cross-sectional view C-C;

FIG. 9 is a schematic diagram illustrating the connection of the connector socket and the connector in the present embodiment;

FIG. 10 is a first schematic view of the power line, the clamping assembly and the lamp in the present embodiment;

FIG. 11 is a second schematic diagram of the power line, the clamping assembly and the lamp in the present embodiment;

fig. 12 is a schematic diagram of the connection between the power line and the clamping assembly and the lamp in this embodiment.

Description of the main reference numerals:

the lamp 1, the shell 11, the second rail 111, the third rail 112, the first screw hole 113 and the second screw hole 114; the connector 12, the plug-in terminal 121, the electric connection terminal 1211, the first fastening portion 1212, and the first through hole a; a second fastening portion 122, a second through hole B; a light-transmitting cover plate 13; a lower magnetic attraction terminal 14;

the connector 2, the body 21, the plug cavity 211, the first fastening cavity 212, the accommodating cavity 213, the third screw hole 214, the partition wall 215, and the fourth screw hole 2151; a terminal 22, a decorative cover 23;

the power line 3 and the upper magnetic attraction connection terminal 31;

the first cylinder 4 and the fixture block 41;

the second cylinder 5, the boss 51 and the groove 511; external threads 52;

a screw cap 6.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are preferred embodiments of the invention and should not be considered as excluding other embodiments. Based on the embodiment of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention.

In the claims, the specification and the drawings, unless otherwise expressly limited, the terms "first," "second," or "third," etc. are used for distinguishing between different elements and not for describing a particular sequence.

In the claims, the specification and the drawings, unless otherwise expressly limited, all directional or positional relationships, such as those using the terms "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," "counterclockwise," and the like, are based on the directional or positional relationships illustrated in the drawings and are for the purpose of convenience in describing the invention and simplifying the description, but do not indicate or imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore are not to be construed as limiting the scope of the invention.

In the claims, the description and the drawings of the present application, unless otherwise expressly limited, the term "fixedly connected" or "fixedly connected" is used, which is to be understood broadly, that is, any connection mode without displacement relation or relative rotation relation between the two, that is, including non-detachably fixed connection, integrated connection and fixed connection through other devices or elements.

In the claims, the specification and the drawings, the terms "including", "comprising" and variations thereof, if used, are intended to be inclusive and not limiting.

Referring to fig. 1 and 2, fig. 1 to 2 show a connection structure in the present embodiment, which includes 2 lamps 1, a connector 2, a power module 3, a clip assembly, and a cap 6.

The lamps 1 are power utilization modules, a plurality of lamps can be arranged, the adjacent lamps 1 are transversely spliced through one connector 2 to form a lamp set, the power supplies between the lamps 1 can be automatically absorbed and communicated, the power supplies between the lamps 1 can be connected in series or in parallel, so that the lamps can be independently controlled, the whole lamp set can be controlled by a control switch on one of the lamps 1, and the invention is explained by adopting a splicing embodiment of 2 lamps 1 in the embodiment.

As shown in fig. 2, each of the lamps 1 includes a housing 11, a connector holder 12, a circuit board built in the housing, and a light-transmitting cover plate 13 (not shown in the figure).

The shell 11 is in a strip shape and is provided with an outer edge with a U-shaped section, three tracks extending along the length direction are formed in the U-shaped cavity, two side walls of the opening of the U-shaped cavity form a first track for the light-transmitting cover plate to be inserted in so as to seal the U-shaped opening, and light can pass through the light-transmitting cover plate; the middle of the U-shaped groove is provided with a second track 111 for installing electrical components such as a circuit board and the like; a third rail 112 is arranged close to the bottom wall of the U-shaped groove and is a second fastening cavity for the insertion of the second fastening part 122; in this embodiment, the lamp 1 is installed in a form that the opening of the U-shaped groove is downward and the bottom wall is upward. In addition, the housing 11 is further provided with 2 first screw holes 113 and 2 second screw holes 114, the first screw holes 113 and the second screw holes 114 are both opened along the vertical rail direction and respectively extend from the second rail 111 to the bottom wall of the housing, wherein the first screw holes 113 do not penetrate through the bottom wall of the housing, and the second screw holes 114 penetrate through the outer surface of the bottom wall of the housing.

The connecting section 12 is constructed as shown in fig. 2 to 4, and has a substantially zigzag shape as a whole. Specifically, the connection holder 12 includes a plugging end 121 and a second fastening portion 122. The right end face of the inserting end 121 is provided with an electric terminal 1211 and a first fastening part 1212, the electric terminal 1211 is an electric terminal with a first magnetic piece, and a lead is led out from the back of the electric terminal to be connected with a circuit board in the shell 11; the first fastening portion 1212 is a square body, extends perpendicularly outwards from the right end face of the insertion end, and is provided with a first through hole a; the second fastening portion 122 is in the shape of an insert, extends along the left end face of the vertical insertion end and the first fastening portion 1212 in the opposite direction, is suitable for being inserted and matched with the third rail 112, and is provided with 2 second through holes B. After the second fastening portion 122 of the connecting seat 12 and the third rail 112 of the housing 11 are inserted in place, 2 first screw holes 113 align to 2 second through holes B, and the two are respectively fastened and connected by screws, the screws can enter from the opening of the housing 11 (i.e., the opening of the U-shaped groove), and extend from the first screw holes 113 on the second rail 111 to pass through the second through holes B until being screwed on the bottom wall of the housing, and the screw heads are limited on the side surface of the second rail 111 facing the first rail, so that the fastening and matching of the second fastening portion 122 and the second fastening cavity are realized, that is, the detachable and fixed connection of the connecting seat 12 and the housing 11 is realized. When the connecting base 12 is fixed to the housing 11, the inserting end 121 of the connecting base 12 is located outside the end surface of the housing 11 for connecting the connector 2.

And the connector 2 is used for inserting the two lamps 1 so as to realize the electric connection between the lamps 1. Specifically, the connector 2 includes a body 21, 2 connection terminals 22, and a decorative cover 23. As shown in fig. 5 to 8, the body 21 is a housing with an outer edge surface adapted to an outer edge surface of the housing, and has two open ends, and 2 insertion cavities 211, a first fastening cavity 212, an accommodating cavity 213 and a third screw hole 214 are formed therein. Wherein, the 2 inserting cavities 211 are located at two ends of the body 21 for inserting the inserting ends 121 of the 2 lamps respectively; the first fastening cavity 212 is located in the middle of the body and extends along the length direction of the lamp 1 to communicate with the insertion cavity 211, so that 2 first fastening portions 1212 are installed oppositely; the receiving cavity 213 is adjacent to the first fastening cavity 212, is located at an upper position of the body, and extends in the same direction as the first fastening cavity 212, so that 2 connection terminals 22 can be mounted. And a third screw hole 214 opened on the outer surface of the bottom wall of the body 21 and penetrating through the bottom wall to communicate with the first fastening cavity 212. Wherein be formed with next door 215 between first fastening chamber 212 and the chamber 213 of holding, it is equipped with 2 fourth screw 2151 to correspond 2 first through-holes A on the next door 215, both are fixed through the screw spiro union respectively, this screw can get into from third screw 214, and run through first through-hole A on the first fastening portion in order to with the fourth screw 2151 spiro union on the next door, and the spiral shell head is restricted in first fastening portion 1212, realize the fastening cooperation relation of first fastening portion 1212 and first fastening chamber 212, realize the dismantled rigid coupling of lamps and lanterns 1 and connector 2 promptly.

2 binding post 22 are for having the binding post of second magnetism piece of inhaling, and both can all be glued or spiro union mode ground dorsad be fixed in holding chamber 213 in, and the wire connection is drawn forth respectively behind both to realize both and go on electrically on connector 2. As shown in fig. 9, when the plugging terminal 121 of the lamp is plugged into the corresponding plugging cavity 211 of the connector and the first fastening portion 1212 of the plugging terminal 121 is plugged into the first fastening cavity 212, the two terminals 22 on the connector are respectively magnetically engaged with the electrical connection terminals 1211 on 2 lamps, so as to electrically connect the 2 lamps 1. Therefore, a user only needs to plug 2 lamps 1 and connectors 2 in place, the magnetic attraction butt joint of the wiring terminal 22 and the electric connection terminal 1211 can be achieved, the electric connection between the 2 lamps 1 is conducted, manual wiring is not needed, the assembly and disassembly smoothness and convenient operation of each module are improved, and wires are not wound, exposed and safe and reliable.

The decorative cover 23 is engaged with the third screw hole 214 and configured such that the outer end surface of the decorative cover 23 is flush with the outer surface of the housing when screwed in place, thereby improving the overall aesthetic appearance of the lamp.

As shown in fig. 10 to 12, in the present embodiment, the power module supplies power to the circuit board in one of the light fixtures. Specifically, the end of the power line 3 led out from the power module is provided with an upper magnetic attraction terminal 31; and the circuit of the circuit board in the lamp is provided with a lower magnetic attraction terminal 14 corresponding to the upper magnetic attraction terminal 31, and when the upper magnetic attraction terminal 31 is in magnetic attraction matching with the lower magnetic attraction terminal 14, the power module is used for supplying power to the circuit board of the lamp. Certainly, the lamp further has functional components not limited to the following, for example, the electronic control module, the electrical connection of the electronic control module, and the like all belong to the prior art, and are not described herein again.

The clamping assembly comprises a first barrel body 4 and a second barrel body 5, a clamping block 41 is radially extended along the outer wall of the first barrel body 4, and an upper magnetic attraction connection terminal 31 connected with a power line extends into the barrel from an opening of the first barrel body 4, penetrates out of the barrel bottom and is fixed on the outer surface of the barrel bottom. The inner wall of the second cylinder 5 is provided with spaced bosses 51, and the lower magnetic attraction and connection terminal 14 connected with the circuit board extends into the cylinder from the outer surface of the bottom wall of the second cylinder 5 and is fixed. When the fixture block 41 of the first cylinder is inserted between the flat position of the boss 5 of the second cylinder and the bottom of the groove at intervals, and is rotated to abut against the boss, so that the clamping relation between the first cylinder 4 and the second cylinder 5 is realized. Preferably, the end of the boss 51 abutting the protrusion 41 is now provided with a groove 511, and when the latch 41 continues to rotate radially in the same direction until the protrusion 41 snaps into the groove 511. The provision of the recess 511 prevents the projection 41 from being easily rotated in the reverse direction automatically and being removed therefrom during use. When the first cylinder 4 is detached, the first cylinder is pressed downwards to slide downwards a small section relative to the second cylinder 5 so as to be separated from the groove 511, and then the first cylinder is rotated reversely until the first cylinder is separated from the boss 51, so that the detachment is realized.

In addition, the outer wall of the second cylinder 5 near the opening is further provided with an external thread 52, which is screwed with the second screw hole 114 of the housing to realize the fixed connection between the second cylinder 5 and the housing 11. Because the second screw hole 114 is a through hole penetrating through the housing, during assembly, the second cylinder 5 is screwed upwards from the lower end of the second screw hole 114 and stops near the upper end of the second screw hole 114, and the first cylinder 4 extends downwards into the second cylinder 5 from the upper end of the second screw hole 114 and rotates to be directly clamped with the second cylinder 5, and the upper magnetic attraction terminal 31 and the lower magnetic attraction terminal 14 which are positioned in the second cylinder 5 can be magnetically attracted to be matched to realize electric connection. Therefore, a user only needs to connect the power module and the lamp 1 through the clamping of the clamping component, the purpose of quick electric connection of the power module and the lamp is achieved, and the installation efficiency is improved.

The spiral cover cap 6 comprises a cover body and a screw rod vertical to the end face of the cover body; the diameter of the cover body is matched with that of the second screw hole 114, the cover body is used for covering the hole edge of the second screw hole 114, a through hole is formed in the cover body, and the through hole extends axially and penetrates through the end face of the screw rod so as to allow a power wire to penetrate through the through hole; in addition, the inner wall of the first cylinder 4 is also provided with an internal thread for screw connection. During assembly, the screw cap 6 is fixedly connected with the first barrel 4 in a screwed mode and the assembly is completed before the first barrel 4 is clamped with the second barrel 5, so that after the screw cap 6 is fixedly connected with the first barrel 4 in a screwed mode, the whole set of screw cap and the second barrel 5 are fixedly connected in a clamped mode, and after the clamping is in place, the end face, away from the screw rod, of the cover body is configured to be flush with the outer surface of the shell, and therefore the overall attractiveness of the lamp 1 is improved.

In other embodiments, the engagement of the snap-fit assembly with the screw cap 6 may also serve as a connector for lifting the light fixture, for example, by threading a lifting cord through the screw cap and tying a knot so that it cannot be removed from the end of the screw. Thus, each lamp 1 can be provided with the structure, so that the use diversity of the lamps is improved.

In other embodiments, the power line 3 can be combined with a lifting rope, that is, the power line 3 is arranged in the lifting rope in a penetrating manner, so that the power line of the lamp 1 is not wound and exposed, and the lamp is safe, reliable and good in appearance.

The description of the above specification and examples is intended to illustrate the scope of the invention, but should not be construed as limiting the scope of the invention.

Claims (10)

1. A connector is used for at least two modules to be plugged so as to realize the electrical connection between the modules; each module is provided with a plug-in end, and the end face of each plug-in end is provided with an electric connection terminal; the connector is characterized by comprising a body and at least two wiring terminals corresponding to the electric terminals; the body is provided with an inserting cavity and an accommodating cavity communicated with the inserting cavity corresponding to each inserting end; the inserting cavity is used for inserting the corresponding inserting end, and each wiring terminal is positioned in the accommodating cavity and electrically connected with the accommodating cavity; when each plug-in end is plugged in place with the corresponding plug-in cavity, each wiring terminal is plugged and matched with the corresponding electric connection terminal to realize electric connection.

2. The connector of claim 1, wherein each of the electrical terminals has a first magnetic member, and each of the electrical terminals has a second magnetic member corresponding to the first magnetic member.

3. A connector as claimed in claim 2, wherein each of said mating ends is further provided with a first fastening portion; the body is also provided with a first fastening cavity corresponding to the fastening part; and each first fastening part is tightly matched with the corresponding first fastening cavity to form the detachable connection relationship between the connector and each module.

4. A connection structure comprising at least two modules and a connector according to claim 3.

5. A connecting structure as claimed in claim 4, wherein each of said modules is a lamp, each of said lamps including a connecting socket, a housing and a circuit board built in said housing; the connecting seat comprises a second fastening part and the inserting end, the second fastening part extends along the end face vertical to the inserting end and is arranged opposite to the first fastening part, and the electric connection terminal of the inserting end is also connected with the circuit board in the same shell through a lead; the shell is provided with a second fastening cavity for the second fastening part to be inserted and matched; the second fastening part is tightly matched with the second fastening cavity to form that the connecting seat is detachably connected with the shell, and the inserting end is positioned outside the shell.

6. A connecting structure as claimed in claim 5, wherein said lamps are two in number; the plugging cavity is arranged at two ends of the connector; when the inserting end of each lamp is inserted in place with the corresponding inserting cavity, the outer surfaces of the connector and the 2 lamps are flush.

7. A coupling structure as claimed in claim 6, further comprising a power module, a first cylinder and a second cylinder;

the shell is provided with a through hole;

an upper magnetic attraction connection terminal is arranged on a power line of the power module and extends out of the outer surface of the cylinder bottom of the first cylinder body and is fixed;

a lower magnetic attraction terminal corresponding to the upper magnetic attraction terminal is arranged on a circuit of one of the circuit boards and extends into the second cylinder from the outer surface of the bottom wall of the second cylinder and is fixed;

the second cylinder is fixed in the through hole in a threaded manner and sleeved with the first cylinder; the lamp comprises a first barrel, a second barrel and a power module, wherein the first barrel and the second barrel are connected in a rotating clamping mode, when the clamping mode is in place, the upper magnetic attraction terminal and the lower magnetic attraction terminal are matched in a magnetic attraction mode, and the power module supplies power to the lamp.

8. A coupling structure according to claim 7, wherein the first cylinder has a latching portion radially extending from an outer wall thereof; the cylinder wall of the second cylinder body is provided with convex seats at intervals, the fixture blocks are inserted between the plane where the convex seats are located and the bottom of the cylinder through the intervals and are rotated to be abutted against the convex seats, and the clamping relation between the first cylinder body and the second cylinder body is achieved.

9. A connection according to claim 8, wherein the end surface of the boss abutting the projection is further provided with a recess, and the block continues to rotate radially in the same direction until the projection snaps into the recess.

10. The connecting structure of claim 9, further comprising a screw cap screwed to the first cylinder, for covering the edge of the through hole and having a through hole for the power cord to pass through; when the first barrel and the second barrel are clamped into place, the upper surface of the screw cap is configured to be flush with the outer surface of the housing.

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