Suspension arm and lamp assembly

Abstract

The utility model discloses a suspension arm and a lamp assembly. The suspension arm comprises a suspension arm body with a first wiring channel and a lamp connecting piece which is provided with a second wiring channel and used for being connected to the top of a lamp. The lamp connecting piece is connected to the lower end of the suspension arm main body through a pivotal shaft, a pre-tightening piece is assembled on the pivotal shaft, and the lamp connecting piece can swing relative to the suspension arm main body; the second wiring channel is communicated with the first wiring channel, the lamp connecting piece is hidden at the top of the lamp, the integrity of the side wall surface of the lamp is kept, the decorative aesthetic feeling is improved, the gravity center of the lamp can be roughly located in the vertical plane where the suspension arm is located, and the stability of the structure can be easily maintained. In the wiring process, the wiring harness directly penetrates into the cavity of the lamp downwards to be connected with the electric appliance element, bending is not needed, the situation that the wiring harness is damaged due to bending can be effectively avoided, the probability of short circuit faults is reduced, and the product performance is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lamps, in particular to a suspension arm and a lamp assembly. Background Art

[0002] Spotlights, track lights, and ceiling lights are often used in places like merchandise display, interior decoration, and outdoor lighting. The lamp housing is typically connected to an overhead mounting structure, such as a mounting base, track, or ceiling, using a boom arm. The lamp housing can swing relative to the boom arm to adjust the lighting angle.

[0003] In the prior art, Chinese utility model patent publication number CN213840662U discloses a single cantilever spotlight, in which the cantilever rod is a hollow, integrated structure. The lower end of the cantilever rod is connected to a cylindrical tube, which is connected to one side of the downlight. The downlight can rotate relative to the cylindrical tube / cantilever rod to adjust the lighting angle.

[0004] The defects of the above-mentioned prior art are:

[0005] First, the connection between the cantilever rod and the downlight is on one side of the downlight, and the center of gravity of the downlight is offset on one side of the cantilever rod, which is not conducive to maintaining the stability of the structure. In addition, a protruding structure needs to be made on the side of the downlight. When the user looks up from the side, he will see the protruding structure at the connection between the cantilever rod and the downlight, which affects the decorative beauty.

[0006] Secondly, the wiring harness passes through the cantilever rod and then bends horizontally to enter the downlight, which is not convenient for wiring the wiring harness. The wiring harness is also easily damaged at the bend and causes a short circuit fault. Utility Model Content

[0007] The purpose of the present utility model is to overcome the deficiencies of the prior art and to provide a boom and lamp assembly, wherein the boom is composed of a boom body and a lamp connector, the lamp connector being connected to the lower end of the boom body via a pivot shaft, the lamp connector being swingable relative to the boom body, and the lamp connector being used to connect to the top of the lamp, thereby hiding the lamp connector at the top of the lamp, maintaining the integrity of the side surface of the lamp, enhancing the decorative aesthetics, and also allowing the center of gravity of the lamp to be roughly within the vertical plane of the boom, thereby facilitating structural stability. The wiring harness passes through the first wiring channel of the boom body and the second wiring channel of the lamp connector and then directly downwardly penetrates into the cavity of the lamp without bending, effectively preventing the wiring harness from being damaged due to bending, reducing the probability of short-circuit failures, and improving product performance.

[0008] The technical solution of the utility model provides a suspension arm for connecting a lamp, wherein the suspension arm comprises a suspension arm body having a first wiring channel and a lamp connector having a second wiring channel and used for connecting to the top of the lamp;

[0009] The lamp connector is connected to the lower end of the boom body via a pivot shaft, the pivot shaft is perpendicular to the boom body, a pre-tightening member is mounted on the pivot shaft, and the lamp connector can swing relative to the boom body;

[0010] The second wiring channel is in communication with the first wiring channel.

[0011] In one of the optional technical solutions, the lower end of the boom body is connected to a first connecting sleeve, and the first connecting sleeve is communicated with the first wiring channel;

[0012] The lamp connector includes a lamp connector and a second connecting sleeve provided on the lamp connector, the second wiring channel is provided on the lamp connector, and the second connecting sleeve is communicated with the second wiring channel;

[0013] The second connecting sleeve is connected to the first connecting sleeve via the pivot shaft, the preload member is provided between the pivot shaft and the second connecting sleeve and / or the first connecting sleeve, and the second connecting sleeve is rotatable relative to the first connecting sleeve.

[0014] In one of the optional technical solutions, a first partition is provided in the first connecting sleeve, and a second partition is provided in the second connecting sleeve;

[0015] The inner open end of the second connecting sleeve is docked with the inner open end of the first connecting sleeve, the first partition and the second partition are connected by the pivot shaft, and the preload member is arranged between the pivot shaft and the second partition and / or the first partition.

[0016] In one of the optional technical solutions, the outer open end of the first connecting sleeve is detachably connected to a first end cap, and the outer open end of the second connecting sleeve is detachably connected to a second end cap.

[0017] In one of the optional technical solutions, the second connecting sleeve is connected to one end of the lamp connector and is located on one side of the center line of the second wiring channel;

[0018] The first connecting sleeve is located above the other end of the lamp connector, and the top surface of the other end of the lamp connector is provided with an arc-shaped plate that matches the contour of the first connecting sleeve.

[0019] In one of the optional technical solutions, the upper end of the boom body is provided with a pivot connection structure for pivotally connecting to the mounting structure.

[0020] In one of the optional technical solutions, the pivot connection structure includes an upper ring fixed on the top of the boom body and a lower ring sleeved on the boom body and located below the upper ring, and the outer diameter of the lower ring is larger than the outer diameter of the upper ring.

[0021] In one of the optional technical solutions, a gasket is mounted above the lower circular ring, and a limiting protrusion is provided on the outer peripheral surface of the gasket.

[0022] In one of the optional technical solutions, the gasket includes an outer ring gasket and an inner ring gasket located in the outer ring gasket;

[0023] The inner ring washer is fixedly connected to the boom body and / or the lower ring;

[0024] The inner circumference of the outer ring gasket is provided with a limiting groove, and the outer circumference of the inner ring gasket is provided with a limiting protrusion, and the limiting protrusion is loosely assembled in the limiting groove.

[0025] The technical solution of the present utility model further provides a lamp assembly, comprising a lamp and the boom as described in any one of the above technical solutions;

[0026] The lamp connector is connected to the top of the lamp, and the second wiring channel is communicated with the cavity in the lamp.

[0027] The above technical solution has the following beneficial effects:

[0028] The utility model provides a boom and lamp assembly, including a boom body and a lamp connector, wherein the boom body has a first wiring channel, and the lamp connector has a second wiring channel. The lamp connector is connected to the lower end of the boom body via a pivot shaft, and the second wiring channel is connected to the first wiring channel. The lamp connector can swing relative to the boom body, and a pre-tightening member is assembled on the pivot shaft to fix the lamp that has been swung into position. The lamp connector is used to connect to the top of the lamp, so that the lamp connector is hidden at the top of the lamp, maintaining the integrity of the side surface of the lamp, improving the decorative aesthetics, and also making the center of gravity of the lamp roughly within the vertical plane where the boom is located, which is conducive to maintaining the stability of the structure. After passing through the first wiring channel and the second wiring channel, the wiring harness directly passes downward into the cavity of the lamp to connect with the electrical components without bending, which can effectively prevent the wiring harness from being damaged due to bending, reduce the probability of short circuit failure, and improve the performance of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The disclosure of the present invention will become easier to understand with reference to the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of the present invention. In the drawings:

[0030] Figure 1 A three-dimensional view of a boom provided in an embodiment of the present invention at a first viewing angle;

[0031] Figure 2 A perspective view of a boom provided in an embodiment of the present invention at a second viewing angle;

[0032] Figure 3 An exploded view of a boom provided in one embodiment of the present utility model;

[0033] Figure 4 A cross-sectional view of a boom provided in one embodiment of the present utility model;

[0034] Figure 5 It is a three-dimensional diagram of the lamp connector;

[0035] Figure 6 A schematic diagram of a lamp assembly provided in one embodiment of the present invention. DETAILED DESCRIPTION

[0036] The following further describes specific embodiments of the present invention with reference to the accompanying drawings. Identical components are denoted by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "inward" and "outward" refer to directions toward or away from the geometric center of a particular component, respectively.

[0037] like Figure 1-6 As shown, an embodiment of the present invention provides a suspension arm for connecting a lamp 5 , and the suspension arm includes a suspension arm body 1 having a first wiring channel 10 and a lamp connector 2 having a second wiring channel 20 and for connecting to the top of the lamp 5 .

[0038] The lamp connector 2 is connected to the lower end of the boom body 1 through a pivot shaft 3 . The pivot shaft 3 is perpendicular to the boom body 1 . A pre-tightening member 31 is assembled on the pivot shaft 3 . The lamp connector 2 can swing relative to the boom body 1 .

[0039] The second wiring channel 20 communicates with the first wiring channel 10 .

[0040] The utility model provides a suspension arm for connecting a lamp 5 and suspending the lamp 5 below a mounting structure 6. The mounting structure 6 can be a fixing seat, a track, a magnetic head, a ceiling, etc.

[0041] The boom includes a boom body 1 and a lamp connector 2. The boom body 1 is a hollow structure with a first wiring channel 10 extending through the boom body 1 at its upper and lower ends. The lamp connector 2 includes a second wiring channel 20 extending through the upper and lower ends of the lamp connector 2.

[0042] The lamp connector 2 is connected to the lower end of the boom body 1 via a pivot shaft 3. The second wiring channel 20 communicates with the first wiring channel 10. The pivot shaft 3 can be a rotating shaft or a fixed shaft provided at the lower end of the boom body 1. The lamp connector 2 is sleeved on the pivot shaft 3 and can rotate relative to the pivot shaft 3. If the pivot shaft 3 is a rotating shaft, the lamp connector 2 can also rotate integrally with the rotating shaft.

[0043] Since the pivot axis 3 is perpendicular to the extension direction of the boom body 1 , the lamp connector 2 can swing relative to the boom body 1 to adjust the lighting angle.

[0044] A pre-tightening member 31 is mounted on the pivot shaft 3 to secure the lamp connector 2 when it is swung into position. The pre-tightening member 31 may be an elastic member, such as a spring, elastic sheet, disc spring, or the like. If the lamp connector 2 and the pivot shaft 3 are pivotally connected, the pre-tightening member 31 is connected between the pivot shaft 3 and the lamp connector 2 to provide a certain amount of friction for the lamp connector 2 and damp its rotation. If the pivot shaft 3 is a rotating shaft, and the lamp connector 2 and the pivot shaft 3 are fixedly connected and rotate as one, the pre-tightening member 31 is connected between the pivot shaft 3 and the boom body 1 to provide a certain amount of friction for the pivot shaft 3 and damp its rotation.

[0045] When the user needs to adjust the illumination direction of the lamp 5 in the vertical direction or within a vertical plane, they simply apply force to the lamp 5 to swing it to the desired angle and then release it. When the external force acting on the lamp 5 disappears, the friction force of the pre-tightening member 31 secures the lamp connector 2, thereby fixing the illumination direction of the lamp 5. The amount of friction can be designed according to the needs.

[0046] When connected to the lamp 5, the lamp connector 2 is connected to the top of the lamp 5, thereby hiding the lamp connector 2 from the user. This maintains the integrity of the side surface of the lamp 5 and enhances the decorative aesthetic. Since the lamp connector 2 is connected to the top of the lamp 5, the center of gravity of the lamp 5 can be roughly located in the vertical plane of the boom, which helps maintain structural stability. During wiring, the wires / wiring harnesses pass through the first wiring channel 10 and the second wiring channel 20 and then directly downward into the cavity of the lamp 5 to connect to the electrical components. No bending is required, which effectively prevents the wiring harness from being damaged due to bending, reduces the probability of short-circuit failures, and improves product performance.

[0047] In one embodiment, Figure 1-5 As shown, the lower end of the boom body 1 is connected to a first connecting sleeve 11 , and the first connecting sleeve 11 is communicated with the first wiring channel 10 .

[0048] The lamp connector 2 includes a lamp connector 21 and a second connector sleeve 22 provided on the lamp connector 21 . The second wiring channel 20 is provided on the lamp connector 21 , and the second connector sleeve 22 is communicated with the second wiring channel 20 .

[0049] The second connecting sleeve 22 is connected to the first connecting sleeve 11 via the pivot shaft 3 . The preload member 31 is disposed between the pivot shaft 3 and the second connecting sleeve 22 and / or the first connecting sleeve 11 . The second connecting sleeve 22 can rotate relative to the first connecting sleeve 11 .

[0050] In this embodiment, the lower end of the boom body 1 is connected to a first connecting sleeve 11, which is preferably integrated with the boom body 1. The first connecting sleeve 11 is located below the first wiring channel 10 and communicates with the first wiring channel 10.

[0051] The lamp connector 2 includes a lamp connector 21 and a second connecting sleeve 22. The second wiring channel 20 is provided on the lamp connector 21 and extends through the upper and lower surfaces of the lamp connector 21. The lamp connector 21 is used to connect to the top of the lamp 5, such as the top cover 51. If needed, a groove can be provided on the top of the lamp 5 to accommodate the lamp connector 21. The lamp connector 21 can be connected to the lamp 5 via a pin, a buckle, etc. If needed, a pin hole 211 can be provided in the lamp connector 21. The pin hole 211 communicates with the second wiring channel 20 for a pin to pass through for connection to the lamp 5.

[0052] The second connecting sleeve 22 is provided on the lamp connector 21 and communicates with the second connecting sleeve 22. Preferably, the second connecting sleeve 22 is integrally provided with the lamp connector 21. The inner opening of the second connecting sleeve 22 faces the first connecting sleeve 11, and the inner opening of the first connecting sleeve 11 faces the second connecting sleeve 22. The inner opening referred to herein is the opening facing the junction between the first connecting sleeve 11 and the second connecting sleeve 22.

[0053] The second connecting sleeve 22 is connected to the first connecting sleeve 11 via the pivot shaft 3 , and the second connecting sleeve 22 can rotate relative to the first connecting sleeve 11 .

[0054] The pivot shaft 3 can be connected between the end plate of the second connecting sleeve 22 and the end plate of the first connecting sleeve 11, or can be connected between the internal bracket of the second connecting sleeve 22 and the internal bracket of the first connecting sleeve 11. The preload member 31 can be optionally provided between the pivot shaft 3 and the second connecting sleeve 22, or can be optionally provided between the pivot shaft 3 and the first connecting sleeve 11, or can be optionally provided between the pivot shaft 3 and the second connecting sleeve 22 and between the pivot shaft 3 and the first connecting sleeve 11.

[0055] The location of the pre-tightening member 31 is determined by the design of the pivot shaft 3 and the connection method between the second connecting sleeve 22 and the pivot shaft 3 .

[0056] In one embodiment, Figure 3-5 As shown, a first partition plate 111 is provided in the first connecting sleeve 11 , and a second partition plate 221 is provided in the second connecting sleeve 22 .

[0057] The inner open end of the second connecting sleeve 22 is docked with the inner open end of the first connecting sleeve 11 , the first partition 111 and the second partition 221 are connected by the pivot shaft 3 , and the preload member 31 is arranged between the pivot shaft 3 and the second partition 221 and / or the first partition 111 .

[0058] In this embodiment, the inner open end of the second connecting sleeve 22 is butted against the inner open end of the first connecting sleeve 11 to form a closed structure, which can prevent dust from entering and also protect the wiring harness.

[0059] In this embodiment, the first connecting sleeve 11 is provided with a first partition 111, which is located between the inner opening and the outer opening of the first connecting sleeve 11. The second connecting sleeve 22 is provided with a second partition 221, which is located between the inner opening and the outer opening of the second connecting sleeve 22.

[0060] The first partition plate 111 and the second partition plate 221 are respectively provided with through holes to facilitate the pivot shaft 3 to pass through and connect.

[0061] The pivot shaft 3 can adopt structures such as pins, screw rods, etc. As required, nuts can be configured at the two ends of the pins and screw rods to lock them.

[0062] The preload member 31 can be optionally arranged between the pivot shaft 3 and the second partition 221 , or can be rotatably arranged between the pivot shaft 3 and the first partition 111 , or can be simultaneously arranged between the pivot shaft 3 and the second partition 221 and between the pivot shaft 3 and the first partition 111 .

[0063] The location of the pre-tightening member 31 is determined by the design of the pivot shaft 3 and the connection method between the first partition plate 111 , the second partition plate 221 and the pivot shaft 3 .

[0064] In one embodiment, Figure 1-4 As shown, the first end cap 112 is detachably connected to the outer open end of the first connecting sleeve 11, and the second end cap 222 is detachably connected to the outer open end of the second connecting sleeve 22, thereby shielding the opening. During assembly, the first end cap 112 and / or the second end cap 222 are removed, and after the pivot shaft 3 and the preload member 31 are assembled, the first end cap 112 and / or the second end cap 222 are installed in place.

[0065] In one embodiment, Figure 4-5 As shown, the second connecting sleeve 22 is connected to one end of the lamp connector 21 and is located on one side of the center line of the second wiring channel 20 .

[0066] The first connecting sleeve 11 is located above the other end of the lamp connector 21 . The top surface of the other end of the lamp connector 21 is provided with an arc-shaped plate 212 that matches the contour of the first connecting sleeve 11 .

[0067] In this embodiment, the second connecting sleeve 22 is located at one end of the lamp connector 21, thereby being offset to one side of the centerline of the second wiring channel 20, exposing the upper end opening of the second wiring channel 20 for wiring. The first connecting sleeve 11 is located above the other end of the lamp connector 21 and can be placed on or suspended from the other end of the lamp connector 21. The second connecting sleeve 22 is offset to the other side of the centerline of the second wiring channel 20, making the structure more compact.

[0068] An arc-shaped plate 212 is provided on the end of the lamp connector 21 below the first connecting sleeve 11 , which matches the contour of the first connecting sleeve 11 so as to support the fallen first connecting sleeve 11 and improve the stability of the structure.

[0069] In one embodiment, Figure 1-4 and Figure 6 As shown, the upper end of the boom body 1 is provided with a pivot connection structure 4 for pivotally connecting to the mounting structure 6, which allows the boom body 1 to be rotated and adjusted in the horizontal direction relative to the mounting structure 6, thereby adjusting the lighting direction of the lamp 5.

[0070] The pivot connection structure 4 can be a flange, a sleeve or the like.

[0071] In one embodiment, Figure 1-4 As shown, the pivot connection structure 4 includes an upper ring 41 fixed on the top of the boom body 1 and a lower ring 42 sleeved on the boom body 1 and located below the upper ring 41, and the outer diameter of the lower ring 42 is larger than the outer diameter of the upper ring 41.

[0072] In this embodiment, the pivot connection structure 4 includes an upper circular ring 41 and a lower circular ring 42 . The outer diameter of the lower circular ring 42 is greater than the outer diameter of the upper circular ring 41 .

[0073] The upper circular ring 41 is fixedly mounted on the top of the boom body 1 . Preferably, the upper circular ring 41 is integrally mounted on the top of the boom body 1 .

[0074] The lower ring 42 is sleeved on the boom body 1 and is located below the upper ring 41. Preferably, the lower ring 42 and the boom body 1 are integrally provided.

[0075] The bottom of the mounting structure 6 is provided with an assembly hole, in which the upper ring 41 is assembled and can rotate. The assembly hole is provided with an elastic pin to prevent the upper ring 41 from falling. The lower ring 42 is located on the bottom surface of the mounting structure 6 and covers the assembly hole.

[0076] In one embodiment, Figure 1-3As shown, a gasket 43 is mounted above the lower circular ring 42 , and a limiting protrusion 433 is provided on the outer circumference of the gasket 43 .

[0077] In this embodiment, a backing ring 43 is disposed on the top surface of the lower ring 42 to fill the gap between the lower ring 42 and the bottom surface of the mounting structure 6. A limiting protrusion 433 is provided on the outer circumference of the backing ring 43 to engage with a limit stop at the bottom of the mounting structure 6 to limit the rotational limit of the boom body 1, effectively preventing the wiring harness inside the boom body 1 from twisting.

[0078] The mounting structure 6 can be a fixing base, a track, a magnetic head, a ceiling, etc.

[0079] In one embodiment, Figure 2-3 As shown, the backing ring 43 includes an outer ring backing ring 431 and an inner ring backing ring 432 located in the outer ring backing ring 431 .

[0080] The inner ring washer 432 is fixedly connected to the boom body 1 and / or the lower ring 42 .

[0081] The inner circumference of the outer washer 431 is provided with a limiting groove 434 , and the outer circumference of the inner washer 432 is provided with a limiting protrusion 435 , which is loosely fitted in the limiting groove 434 .

[0082] In this embodiment, the gasket 43 is divided into an outer ring gasket 431 and an inner ring gasket 432 . The inner ring gasket 432 is located in the outer ring gasket 431 , and the outer ring gasket 431 can rotate relative to the inner ring gasket 432 .

[0083] The inner washer 432 may be fixedly connected to the boom body 1 and / or the lower circular ring 42 . Preferably, the inner washer 432 is integrally connected to the boom body 1 and / or the lower circular ring 42 .

[0084] The inner circumference of the outer ring gasket 431 is provided with a limiting groove 434 , and the outer circumference of the inner ring gasket 432 is provided with a limiting protrusion 435 . The limiting protrusion 435 is preferably provided integrally with the inner ring gasket 432 .

[0085] The size of the limiting protrusion 435 is smaller than the size of the limiting groove 434, and the limiting protrusion 435 is loosely assembled in the limiting groove 434. When the boom body 1 is rotated, the limiting protrusion 435 slides in the limiting groove 434. At this time, the outer ring washer 431 does not rotate, allowing the boom body 1 to have a certain amount of free movement in the circumferential direction. When the boom body 1 is further rotated so that the limiting protrusion 435 contacts the side wall of the limiting groove 434, the outer ring washer 431 is driven to rotate as a whole. When the limiting protrusion 433 of the outer ring washer 431 is blocked by the limiting block at the bottom of the mounting structure 6, further rotation is impossible, and the boom body 1 needs to be reversed to prevent the internal wiring harness from twisting.

[0086] like Figure 6 As shown, an embodiment of the present invention provides a lamp assembly, including a lamp 5 and the suspension arm described in any of the above embodiments.

[0087] The lamp connector 2 is connected to the top of the lamp 5 , and the second wiring channel 20 is communicated with the cavity of the lamp 5 .

[0088] The lamp assembly provided by the present invention comprises a lamp 5 and a boom. For the structure, construction and working principle of the boom, please refer to the above description of the boom, which will not be repeated here.

[0089] During assembly, the lamp connector 2 is connected to the top of the lamp 5, for example, mounted on the top cover 51 of the lamp 5. The second wiring channel 20 communicates with the cavity of the lamp 5. The wiring harness passes through the first wiring channel 10 and the second wiring channel 20 and then directly downwards into the cavity of the lamp 5 to connect with the electrical components. Alternatively, the wiring harness drawn from the top of the lamp 5 passes through the second wiring channel 20 and the first wiring channel 10 in sequence for routing.

[0090] In one embodiment, the lamp assembly includes a mounting structure 6, and the pivot connection structure 4 at the upper end of the boom body 1 is pivotally connected to the mounting structure 6, so that the boom body 1 can be rotated and adjusted in the horizontal direction relative to the mounting structure 6, thereby adjusting the lighting direction of the lamp 5.

[0091] The mounting structure 6 can be a fixing base, a track, a magnetic head, a ceiling, etc.

[0092] As needed, the above technical solutions can be combined to achieve the best technical effect.

[0093] The above are only the principles and preferred embodiments of the present invention. It should be noted that, for those skilled in the art, on the basis of the principles of the present invention, several other modifications can be made, which should also be considered as the scope of protection of the present invention.

Claims

1. A boom for connecting a lamp, characterized in that: The utility model comprises a boom body having a first wiring channel and a lamp connector having a second wiring channel and being used for connecting to the top of the lamp; The lamp connector is connected to the lower end of the boom body via a pivot shaft, the pivot shaft is perpendicular to the boom body, a pre-tightening member is mounted on the pivot shaft, and the lamp connector can swing relative to the boom body; The second wiring channel is in communication with the first wiring channel.

2. The boom according to claim 1, wherein: The lower end of the boom body is connected to a first connecting sleeve, and the first connecting sleeve is communicated with the first wiring channel; The lamp connector includes a lamp connector and a second connecting sleeve provided on the lamp connector, the second wiring channel is provided on the lamp connector, and the second connecting sleeve is communicated with the second wiring channel; The second connecting sleeve is connected to the first connecting sleeve via the pivot shaft, the preload member is provided between the pivot shaft and the second connecting sleeve and / or the first connecting sleeve, and the second connecting sleeve is rotatable relative to the first connecting sleeve.

3. The boom according to claim 2, wherein: A first partition is provided in the first connecting sleeve, and a second partition is provided in the second connecting sleeve; The inner open end of the second connecting sleeve is docked with the inner open end of the first connecting sleeve, the first partition and the second partition are connected by the pivot shaft, and the preload member is arranged between the pivot shaft and the second partition and / or the first partition.

4. The boom according to claim 3, wherein: The outer open end of the first connecting sleeve is detachably connected to a first end cap, and the outer open end of the second connecting sleeve is detachably connected to a second end cap.

5. The boom according to claim 2, wherein: The second connecting sleeve is connected to one end of the lamp connector and is located on one side of the center line of the second wiring channel; The first connecting sleeve is located above the other end of the lamp connector, and the top surface of the other end of the lamp connector is provided with an arc-shaped plate that matches the contour of the first connecting sleeve.

6. The boom according to any one of claims 1 to 5, characterized in that: The upper end of the boom body is provided with a pivot connection structure for pivotally connecting with the mounting structure.

7. The boom according to claim 6, wherein: The pivot connection structure includes an upper ring fixed on the top of the boom body and a lower ring sleeved on the boom body and located below the upper ring, and the outer diameter of the lower ring is larger than the outer diameter of the upper ring.

8. The boom according to claim 7, wherein: A gasket is mounted above the lower circular ring, and a limiting convex portion is provided on the outer peripheral surface of the gasket.

9. The boom according to claim 8, wherein: The gasket includes an outer ring gasket and an inner ring gasket located in the outer ring gasket; The inner ring washer is fixedly connected to the boom body and / or the lower ring; The inner circumference of the outer ring gasket is provided with a limiting groove, and the outer circumference of the inner ring gasket is provided with a limiting protrusion, and the limiting protrusion is loosely assembled in the limiting groove.

10. A lamp assembly, characterized in that: comprising a lamp and a boom according to any one of claims 1 to 9; The lamp connector is connected to the top of the lamp, and the second wiring channel is communicated with the cavity of the lamp.

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