Lamp with telescopic arm

Abstract

The lamp comprises a lamp holder used for emitting light and the arm supporting the lamp holder to rotate, the arm comprises a longitudinal arm and a transverse arm which are connected with each other, the longitudinal arm comprises a fixed section and a telescopic section which are in sliding fit, the transverse arm is connected with the fixed section, and a pivoting shaft of the lamp holder is pivoted to the telescopic section. A driving shaft of a motor for driving the lamp holder to rotate is located on the fixed section, a driving wheel fixed to the driving shaft is connected with a driven wheel fixed to the pivot joint shaft through a synchronous belt located in the longitudinal arm, and the lamp further comprises a limiting piece for limiting the synchronous belt to be located on the same plane with the driving wheel and the driven wheel all the time. And the locking piece is used for locking the telescopic section and the fixed section at at least two opposite positions, so that the longitudinal arm has an extension state and a contraction state. Therefore, when the longitudinal arm recovers to the extension state, under the action of the limiting piece, the synchronous belt can recover to be meshed with the driving wheel and / or the driven wheel, and therefore the motor can normally drive the lamp holder to rotate.

Description

Technical Field

[0001] The present invention relates to the technical field of stage lamps, and more particularly to a lamp with a telescopic arm. Background Art

[0002] To allow the lamp head to rotate freely, the longitudinal arm supporting the lamp head is typically longer to prevent the lateral arm from interfering with the lamp head. However, during transportation, even if the lamp head is rotated horizontally to reduce the overall height of the lamp, the excessively long longitudinal arm still takes up a large space. This requires a larger flight case to transport the lamp, which wastes the case and increases shipping costs. Summary of the Invention

[0003] In order to overcome at least one of the above-mentioned defects of the prior art, the present invention provides a lamp with a telescopic arm, the longitudinal arm of which can be extended and retracted as needed to adjust the height of the lamp for easy transportation.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a lamp with a telescopic arm, including a lamp head for emitting light and an arm supporting the rotation of the lamp head, the arm including a longitudinal arm and a transverse arm connected to each other, wherein the longitudinal arm includes a fixed section and a telescopic section that are slidably matched through a guide mechanism, the transverse arm is connected to the fixed section, the pivot shaft of the lamp head is pivotally connected to the telescopic section, the driving shaft of the motor that drives the lamp head to rotate is located in the fixed section, the driving wheel fixed on the driving shaft and the driven wheel fixed on the pivot shaft are connected through a synchronous belt located in the longitudinal arm, and also includes a timing belt located in the telescopic section. During the sliding of the fixed section, a limit piece restricts the synchronous belt from always being in the same plane as the driving wheel and the driven wheel, and a locking piece locks the telescopic section and the fixed section in at least two relative positions so that the longitudinal arm has an extended state and a contracted state. When the longitudinal arm is in the extended state, the synchronous belt is straightened and engaged with the driving wheel and the driven wheel at the same time. During the rotation of the lamp head, the end thereof away from its own light outlet does not interfere with the transverse arm; when the longitudinal arm is in the contracted state, the synchronous belt curls, and the transverse arm restricts the end of the lamp head away from its own light outlet from passing through during the rotation.

[0005] The lamp with a telescopic arm is configured such that the longitudinal arm of the arm is provided with a fixed section and a telescopic section that are slidably engaged through a guide mechanism, and the telescopic section is locked to at least two positions on the fixed section by a locking member, thereby enabling adjustment of the length of the longitudinal arm. Furthermore, the driving wheel fixed on the driving shaft and the driven wheel fixed on the pivot shaft are connected by a synchronous belt located within the longitudinal arm. During the sliding of the telescopic section relative to the fixed section, the limiting member restricts the synchronous belt to always be in the same plane as the driving wheel and the driven wheel. In this way, when the longitudinal arm returns from a contracted state to an extended state, the synchronous belt can resume engagement with the driving wheel and / or the driven wheel, thereby allowing the motor to normally drive the lamp head to rotate.

[0006] Furthermore, two abutments are provided on the side of the driven wheel near the driving wheel. After the synchronous belt passes through the driven wheel, its ends respectively pass through the gap between one of the abutments and the driven wheel and then engage with the driving wheel. During the sliding of the telescopic section relative to the fixed section, the two abutments jointly maintain the synchronous belt and the driven wheel in a constant meshing state. The abutments ensure that even when the longitudinal arm is in a retracted state, the synchronous belt will not disengage from the driven wheel and will remain meshed with it, thus preventing the synchronous belt from arching on the surface of the driven wheel, which would affect the synchronous belt's ability to recover its fully stretched length.

[0007] Furthermore, there are at least two stoppers, one each near the driven wheel and the other near the driving wheel, to limit the synchronous belt. Because synchronous belts are prone to curling but not to deformation in the width direction, limiting the annular synchronous belt near the driven wheel and the other near the driving wheel can better ensure that the synchronous belt is always in the same plane as the driving wheel and the driven wheel.

[0008] Furthermore, the limiting member includes a first limiting plate and a second limiting plate located on either side of the synchronous belt in the width direction thereof. The first limiting plate and the second limiting plate respectively limit the synchronous belt from departing from the planes of the driving wheel and the driven wheel in the width direction of the synchronous belt. The first limiting plate and the second limiting plate can perfectly limit the plane of the synchronous belt, and the preset distance between the first limiting plate and the second limiting plate and the telescopic section can prevent interference with other components within the longitudinal arm when the synchronous belt is curled.

[0009] Furthermore, the telescopic section is provided with a through hole, and the fixed section is provided with locking positions at at least two heights. The locking tongue of the locking member passes through the through hole and selectively cooperates with one of the locking positions to lock the telescopic section. The locking tongue passes through the through hole and is inserted into the locking position, thereby securing the telescopic section to the fixed section, resulting in a simple and secure structure.

[0010] Furthermore, the locking member includes a rotating rod pivotally connected to the telescopic section and an operating rod for driving the rotating rod to rotate, and a connecting rod having two ends hingedly connected to the ends of the rotating rod and the locking tongue, respectively, and the locking tongue is slidably disposed on the telescopic section. When the operating rod drives the rotating rod to rotate, the connecting rod, because the two ends of the connecting rod are hingedly connected to the ends of the rotating rod and the locking tongue, respectively, drives the locking tongue to slide on the telescopic section, thereby entering / exiting the through-hole.

[0011] Furthermore, the rotating rod is fixedly connected to a steering rod, and the operating rod is hinged to the steering rod. The operating rod can rotate the rotating rod by driving the steering rod without being directly connected to the rotating rod. The steering rod is convenient for freely selecting the position of the operating rod.

[0012] Furthermore, a reset member is included to keep the lock tongue in a state of always extending from the through hole. Thus, after the operating lever forcibly drives the lock tongue out of the locked position and moves the telescopic section to a suitable position, the lock tongue will automatically extend from the through hole under the action of the reset member and cooperate with the corresponding locking position, thereby achieving locking of the telescopic section and the fixed section.

[0013] Furthermore, the guide mechanism includes two guide grooves on the fixed section extending along the sliding direction of the telescopic section, and the two sides of the telescopic section are located in the guide grooves. The guide grooves can prevent the telescopic section from shaking and guide its moving direction.

[0014] Furthermore, gap adjustment plates are provided on both sides of the telescopic section, the gap adjustment plates being located in the guide groove and abutting against the sidewalls of the guide groove, and the spacing between the gap adjustment plates and the telescopic section being adjustable. The gap adjustment plates can effectively prevent the telescopic section from shaking in the guide groove.

[0015] Furthermore, the fixing section further includes a fixing plate for fixing the motor, and the guide groove is detachably fixed to the fixing plate. The fixing plate and the guide groove are separately processed and then assembled, which can effectively reduce the processing cost of the fixing section compared to integral machining.

[0016] Furthermore, the guide mechanism includes a guide post provided on the transverse arm and extending in the sliding direction of the telescopic section, and a guide hole provided on the telescopic section and sleeved over the guide post. The cooperation between the guide post and the guide hole can prevent the telescopic section from shaking and guide its movement direction.

[0017] Furthermore, the device further includes an elastic member that causes the telescopic section to always move away from the fixed section. When the telescopic section loses external force or the locking member is locked, the elastic member drives the telescopic section to extend as far as possible from the fixed section, thereby maximizing the length of the longitudinal arm and allowing normal use of the lamp.

[0018] Furthermore, when the longitudinal arm is in the retracted state, the distance between the outer wall of the section of the lamp head where the pivot axis is located and the transverse arm is less than 5 cm. The length of the longitudinal arm is shortened as much as possible, reducing the overall height of the lamp for easy storage.

[0019] Furthermore, the invention further comprises a chassis supporting the rotation of the arm, the chassis being pivotally connected to the transverse arm of the arm. The arm can rotate relative to the chassis about a first axis, and the lamp head can rotate relative to the arm about a second axis, so that the light emitted by the lamp head can be projected in any direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the lamp with a telescopic arm of the present invention.

[0021] Figure 2 It is a structural schematic diagram of the longitudinal arm of the present invention in an extended state and a contracted state respectively.

[0022] Figure 3 It is a schematic diagram of the explosion structure of the telescopic section of the present invention.

[0023] Figure 4 It is a schematic diagram of the assembly structure of the telescopic section of the present invention.

[0024] Figure 5 It is a schematic diagram of the explosion structure of the fixed section of the present invention.

[0025] Figure 6 It is a schematic diagram of the matching structure of the first shell and the second shell of the present invention.

[0026] In the picture: 100, lamp holder; 110, pivot shaft; 120, driven wheel; 130, light outlet; 200, arm; 210, longitudinal arm; 211, fixing section; 2111, blocking member; 2112, locking position; 2113, guide groove; 2114, fixing plate; 2115, guide post; 2116, elastic member; 2117, first housing; 212, telescopic section; 2121, friction lubrication plate; 2122, through hole; 2123, gap adjustment plate; 2124, guide hole; 2125, guide block; 2126, second housing; 213, limiting member; 2131, first limiting plate; 2132, second limiting plate; 2133, support post; 2134, avoidance hole; 214, locking member; 2141, locking tongue; 2142, rotating rod; 2143, connecting rod; 2144, operating lever; 2145, steering rod; 2146, reset member; 215, synchronous belt; 216, supporting member; 217, elongated hole; 220, transverse arm; 300, motor; 310, drive shaft; 320, drive wheel. DETAILED DESCRIPTION

[0027] The drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate the embodiments, some components in the drawings may be omitted, enlarged, or reduced in size, and do not represent actual product dimensions. Those skilled in the art will understand that some well-known structures and their descriptions may be omitted from the drawings. The positional relationships depicted in the drawings are for illustrative purposes only and should not be construed as limiting this patent.

[0028] like Figures 1 to 4The present invention provides a lamp with a telescopic arm, including a lamp head 100 for emitting light and an arm 200 for supporting the rotation of the lamp head 100, the arm 200 including a longitudinal arm 210 and a transverse arm 220 connected to each other, wherein the longitudinal arm 210 includes a fixed section 211 and a telescopic section 212 that are slidably matched through a guide mechanism, the transverse arm 220 is connected to the fixed section 211, the pivot shaft 110 of the lamp head 100 is pivotally connected to the telescopic section 212, the driving shaft 310 of the motor 300 that drives the lamp head 100 to rotate is located in the fixed section 211, the driving wheel 320 fixed on the driving shaft 310 and the driven wheel 120 fixed on the pivot shaft 110 are connected through a synchronous belt 215 located in the longitudinal arm 210, and further includes a timing belt 215 located in the longitudinal arm 210, wherein the telescopic section 212 is relatively fixed to the During the sliding of the fixed section 211, the limiting member 213 limits the synchronous belt 215 to always be in the same plane with the driving wheel 320 and the driven wheel 120, and the locking member 214 locks the telescopic section 212 and the fixed section 211 in at least two relative positions so that the longitudinal arm 210 has an extended state and a contracted state. When the longitudinal arm 210 is in the extended state, the synchronous belt 215 is straightened and engaged with the driving wheel 320 and the driven wheel 120. During the rotation of the lamp head 100, the end thereof away from its own light outlet 130 does not interfere with the transverse arm 220; when the longitudinal arm 210 is in the contracted state, the synchronous belt 215 curls, and the transverse arm 220 limits the end of the lamp head 100 away from its own light outlet 130 from passing through during the rotation.

[0029] The lamp with a telescopic arm is configured by configuring the longitudinal arm 210 of the arm 200 with a fixed section 211 and a telescopic section 212 that slide together via a guide mechanism, and locking the telescopic section 212 to at least two positions on the fixed section 211 via a locking member 214, thereby enabling adjustment of the length of the longitudinal arm 210. Furthermore, a driving wheel 320 fixed to the driving shaft 310 and a driven wheel 120 fixed to the pivot shaft 110 are connected by a synchronous belt 215 located within the longitudinal arm 210. During the sliding movement of the telescopic section 212 relative to the fixed section 211, a stopper 213 constrains the synchronous belt 215 to always be in the same plane as the driving wheel 320 and the driven wheel 120. Thus, when the longitudinal arm 210 returns from a retracted state to an extended state, the synchronous belt 215 can resume engagement with the driving wheel 320 and / or the driven wheel 120, thereby enabling the motor 300 to normally drive the lamp head 100 to rotate.

[0030] Generally speaking, when the longitudinal arm 210 is in the extended state, its length reaches its maximum, so the telescopic section 212 and the fixed section 211 have only one relative position. When the longitudinal arm 210 is in the contracted state, corresponding to different degrees of contraction, the longitudinal arm 210 can have multiple lengths, so the telescopic section 212 and the fixed section 211 can have multiple relative positions.

[0031] Preferably, a blocking member 2111 is further provided on the fixed section 211 to prevent the telescopic section 212 from separating from the fixed section 211 .

[0032] Preferably, a plurality of friction lubrication sheets 2121 are further provided at the contact position between the telescopic section 212 and the fixed section 211 , so as to enable the telescopic section 212 to slide smoothly.

[0033] like Figures 2 to 4 In a preferred embodiment of the present invention, two abutting members 216 are provided on the side of the driven wheel 120 near the driving wheel 320. After the synchronous belt 215 passes through the driven wheel 120, its ends respectively engage the driving wheel 320 through the gap between the abutting members 216 and the driven wheel 120. During the sliding of the telescopic section 212 relative to the fixed section 211, the two abutting members 216 jointly maintain the synchronous belt 215 and the driven wheel 120 in a constant meshing state. The abutting members 216 ensure that even when the longitudinal arm 210 is in a retracted state, the synchronous belt 215 will not disengage from the driven wheel 120, but will remain meshed therewith. This prevents the synchronous belt 215 from arching on the surface of the driven wheel 120, which would affect the synchronous belt 215's ability to recover its fully stretched length.

[0034] Preferably, the abutting member 216 is pivotally connected to the roller of the telescopic section 212 to reduce friction with the synchronous belt 215 .

[0035] Preferably, the gap between the abutment 216 and the bottom of the serrations of the driven wheel 120 is less than 1.3 times the thickness of the synchronous belt 215 to prevent the protruding teeth on the synchronous belt 215 from exiting the gaps between the serrations of the driven wheel 120. More preferably, the gap between the abutment 216 and the bottom of the serrations of the driven wheel 120 is less than 1.2 times the thickness of the synchronous belt 215.

[0036] Preferably, when the longitudinal arm 210 is in the retracted state, the synchronous belt 215 disengages from the driving wheel, and the lamp further includes an angle sensor that detects the rotation angle of the driven wheel 120 to confirm the rotation angle of the lamp head 100. Because the driven wheel 120 is generally large, while the driving wheel 320 is generally small (typically, the radius of the driven wheel 120 is at least three times the radius of the driving wheel 320), and the synchronous belt 215 itself has a certain degree of toughness, even if the synchronous belt 215 disengages from the driving wheel when the longitudinal arm 210 is in the retracted state, the synchronous belt 215 will not bulge on the surface of the driving wheel 320 when the longitudinal arm 210 returns to the extended state, but will be fully engaged.

[0037] like Figures 3 to 5 In a preferred embodiment of the present invention, there are at least two stoppers 213 , one each located near the driven pulley 120 and the other near the driving pulley 320 to limit the synchronous belt 215. Because the synchronous belt 215 is susceptible to curling but not to deformation in the width direction, the annular synchronous belt 215 is limited near the driven pulley 120 and the other near the driving pulley 320 . This ensures that the synchronous belt 215 is always in the same plane as the driving pulley 320 and the driven pulley 120.

[0038] Since the driven wheel 120 is generally larger, while the driving wheel 320 is generally smaller (typically, the radius of the driven wheel 120 is at least three times the radius of the driving wheel 320), the limiting member 213 near the driven wheel 120 is preferably located on the side thereof near the driving wheel 320; the limiting member 213 near the driving wheel 320 covers the entire driving wheel 320, that is, it limits the portion of the synchronous belt 215 that surrounds the driving wheel 320.

[0039] In a preferred embodiment of the present invention, the limiting member 213 includes a first limiting plate 2131 and a second limiting plate 2132 located on either side of the synchronous belt 215 in the width direction. The first limiting plate 2131 and the second limiting plate 2132 respectively limit the synchronous belt 215 from departing from the plane of the driving wheel 320 and the driven wheel 120 in the width direction of the synchronous belt 215. The first limiting plate 2131 and the second limiting plate 2132 can perfectly limit the plane of the synchronous belt 215. The preset distance between the first limiting plate 2131, the second limiting plate 2132 and the telescopic section 212 can prevent the synchronous belt 215 from interfering with other components within the longitudinal arm 210 when curling.

[0040] Preferably, the first limiting plate 2131 and the second limiting plate 2132 are supported by a support column 2133 to separate the two.

[0041] Preferably, the limiting member 213 near the position of the driven wheel 120 is roughly T-shaped, limiting the synchronous belt 215 from gradually narrowing from the driven wheel 120 to a parallel part; the limiting member 213 near the position of the driving wheel 320 is square, and an avoidance hole 2134 is provided corresponding to the driving wheel 320.

[0042] In a preferred embodiment of the present invention, the telescopic section 212 is provided with a through hole 2122, and the fixed section 211 is provided with locking positions 2112 at at least two heights. The locking tongue 2141 of the locking member 214 passes through the through hole 2122 and selectively engages with one of the locking positions 2112 to lock the telescopic section 212. The locking tongue 2141 passes through the through hole 2122 and is inserted into the locking position 2112, thereby securing the telescopic section 212 to the fixed section 211, resulting in a simple and secure structure.

[0043] Preferably, the locking position 2112 on the fixing section 211 is a hole structure.

[0044] Preferably, the telescopic section 212 is provided with two locking tongues 2141 that are separated from each other, and the through holes 2122 and the locking positions 2112 are respectively provided correspondingly.

[0045] like Figure 3 In a preferred embodiment of the present invention, the locking member 214 includes a rotating rod 2142 pivotally connected to the telescopic section 212, an operating rod 2144 for driving the rotating rod 2142 to rotate, and a connecting rod 2143 having two ends hingedly connected to the ends of the rotating rod 2142 and the locking tongue 2141, respectively. The locking tongue 2141 is slidably disposed on the telescopic section 212. The operating rod 2144 drives the rotating rod 2142 to rotate. Since the two ends of the connecting rod 2143 are hingedly connected to the ends of the rotating rod 2142 and the locking tongue 2141, respectively, the connecting rod 2143 drives the locking tongue 2141 to slide on the telescopic section 212, thereby entering / exiting the through-hole 2122.

[0046] Preferably, the locking tongue 2141 is provided with an elongated hole 217 , and is slidably arranged on the telescopic section 212 by a screw passing through the elongated hole 217 , and the locking tongue 2141 can also rotate around the screw.

[0047] Preferably, the operating rod 2144 extends along the sliding direction of the telescopic section 212 and protrudes from an end of the telescopic section 212 away from the fixed section 211 .

[0048] When the telescopic section 212 is provided with two locking tongues 2141 that are separated from each other, the middle portion of the rotating rod 2142 is pivotally connected to the telescopic section 212 , and both ends are connected to the locking tongue 2141 via a connecting rod 2143 , and the locking tongues 2141 face opposite directions.

[0049] In a preferred embodiment of the present invention, a steering rod 2145 is fixedly connected to the rotating rod 2142, and the operating rod 2144 is hingedly connected to the steering rod 2145. The operating rod 2144 can rotate the rotating rod 2142 by driving the steering rod 2145 without being directly connected to the rotating rod 2142. The positioning of the steering rod 2145 facilitates the free selection of the position of the operating rod 2144.

[0050] Preferably, the steering rod 2145 is connected to the position where the rotating rod 2142 and the telescopic section 212 are pivotally connected, and is substantially perpendicular to the rotating rod 2142 .

[0051] In a preferred embodiment of the present invention, a reset member 2146 is further included to ensure that the locking tongue 2141 always has a tendency to extend from the through hole 2122. Thus, after the operating rod 2144 forcibly drives the locking tongue 2141 out of the locking position 2112 and moves the telescopic section 212 to a suitable position, the locking tongue 2141, under the action of the reset member 2146, automatically extends from the through hole 2122 and engages with the locking position 2112 at the corresponding position, thereby locking the telescopic section 212 and the fixed section 211.

[0052] Preferably, the reset member 2146 is a spring, one end of which is connected to the telescopic section 212 , and the other end of which is connected to the operating rod 2144 .

[0053] like Figures 2 to 5 In a preferred embodiment of the present invention, the guide mechanism includes two guide grooves 2113 on the fixed section 211 extending along the sliding direction of the telescopic section 212. Both sides of the telescopic section 212 are located in the guide grooves 2113. The guide grooves 2113 can prevent the telescopic section 212 from shaking and guide its movement direction.

[0054] In a preferred embodiment of the present invention, gap adjustment plates 2123 are provided on both sides of the telescopic section 212. These gap adjustment plates 2123 are located within the guide slot 2113 and abut the sidewalls of the guide slot 2113. The spacing between the gap adjustment plates 2123 and the telescopic section 212 is adjustable. These gap adjustment plates 2123 effectively prevent the telescopic section 212 from wobbling within the guide slot 2113. Preferably, the gap adjustment plates 2123 are secured to the telescopic section 212 via screws. The telescopic section 212 is provided with elongated holes 217 corresponding to the screws, extending along the length of the pivot shaft 110, to allow the screws to move therein, thereby fine-tuning the spacing between the gap adjustment plates 2123 and the telescopic section 212.

[0055] Preferably, the blocking member 2111 is disposed on the guide groove 2113 .

[0056] In a preferred embodiment of the present invention, the fixing section 211 further includes a fixing plate 2114 for fixing the motor 300, and the guide slot 2113 is detachably fixed to the fixing plate 2114. The fixing plate 2114 and the guide slot 2113 are separately machined and then assembled, which can effectively reduce the processing cost of the fixing section 211 compared to integral machining.

[0057] Preferably, the guide groove 2113 is fixed to the fixing plate 2114 by screws, and the fixing plate 2114 is provided with a long hole 217 corresponding to the screw and perpendicular to the sliding direction of the telescopic section 212 to allow the screw to move therein to fine-tune the distance between the two guide grooves 2113.

[0058] In a preferred embodiment of the present invention, the guide mechanism includes a guide post 2115 provided on the transverse arm 220 and extending in the sliding direction of the telescopic section 212. The telescopic section 212 is provided with a guide hole 2124 that is sleeved outside the guide post 2115. The cooperation between the guide post 2115 and the guide hole 2124 can prevent the telescopic section 212 from shaking and guide its movement direction.

[0059] Preferably, the guide hole 2124 is formed on a guide block 2125 , and the guide block 2125 is fixed to the guide groove 2113 .

[0060] In a preferred embodiment of the present invention, an elastic member 2116 is further included to keep the telescopic section 212 constantly moving away from the fixed section 211. When the telescopic section 212 loses external force or the locking member 214 is locked, the elastic member 2116 drives the telescopic section 212 to extend as far as possible from the fixed section 211, maximizing the length of the longitudinal arm 210 and allowing normal operation of the lamp.

[0061] Preferably, the elastic member 2116 is a spring, which is sleeved on the guide column 2115 , with two ends respectively abutting against the transverse arm 220 and the guide block 2125 .

[0062] like Figure 6 In a preferred embodiment of the present invention, the fixed section 211 is covered with a first shell 2117, and the telescopic section 212 is provided with a second shell 2126. When the telescopic section 212 slides relative to the fixed section 211, the second shell 2126 moves with the telescopic section 212 and is partially accommodated in the first shell 2117 (such as Figure 6 a), or a portion of the fixed section 211 is accommodated in the accommodation gap between the second shell 2126 and the outer wall of the telescopic section 212 (such as Figure 6 b).

[0063] In a preferred embodiment of the present invention, when the longitudinal arm 210 is in the retracted state, the distance between the outer wall of the section of the lamp head 100 where the pivot axis 110 is located and the transverse arm 220 is less than 5 cm. This minimizes the length of the longitudinal arm 210 and reduces the overall height of the lamp for easier storage.

[0064] Preferably, when the longitudinal arm 210 is in the retracted state, the distance between the outer wall of a section of the lamp head 100 where the pivot shaft 110 is arranged and the transverse arm 220 is less than 3 cm, more preferably less than 1 cm.

[0065] like Figure 1 In a preferred embodiment of the present invention, a chassis is further included to support the rotation of the arm 200, and the chassis is pivotally connected to the transverse arm 220 of the arm 200. The arm 200 can rotate relative to the chassis about a first axis, and the lamp head 100 can rotate relative to the arm 200 about a second axis, so that the light emitted by the lamp head 100 can be projected in any direction.

[0066] Preferably, the first axis is perpendicular to the second axis, which facilitates calculation of the spatial angle of the lamp holder 100 .

[0067] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A lamp with a telescopic arm, characterized in that: The invention comprises a lamp head (100) for emitting light and an arm (200) for supporting the rotation of the lamp head (100), wherein the arm (200) comprises a longitudinal arm (210) and a transverse arm (220) connected to each other, wherein the longitudinal arm (210) comprises a fixed section (211) and a telescopic section (212) which are slidably matched through a guide mechanism, the transverse arm (220) is connected to the fixed section (211), and the pivot shaft (110) of the lamp head (100) is pivotally connected to the telescopic section (212) to drive the lamp head (100). The driving shaft (310) of the rotating motor (300) is located in the fixed section (211), and the driving wheel (320) fixed on the driving shaft (310) and the driven wheel (120) fixed on the pivot shaft (110) are connected via a synchronous belt (215) located in the longitudinal arm (210). The device also includes a limiting member (215) for limiting the synchronous belt (215) to always be in the same plane as the driving wheel (320) and the driven wheel (120) during the sliding process of the telescopic section (212) relative to the fixed section (211). 213), and locking the telescopic section (212) and the fixed section (211) at at least two relative positions so that the longitudinal arm (210) has a locking member (214) in an extended state and a contracted state. When the longitudinal arm (210) is in the extended state, the synchronous belt (215) is stretched and engaged with the driving wheel (320) and the driven wheel (120). During the rotation of the lamp head (100), the end thereof away from its own light outlet (130) does not interfere with the transverse arm (220); when the longitudinal arm (210) is in the contracted state, the synchronous belt (215) is curled, and the transverse arm (220) restricts the end of the lamp head (100) away from its own light outlet (130) from passing over during the rotation.

2. The lamp with a telescopic arm according to claim 1, characterized in that: Two abutting members (216) are provided on one side of the driven wheel (120) close to the driving wheel (320); after the synchronous belt (215) passes through the driven wheel (120), both ends thereof respectively engage with the driving wheel (320) through a gap between one of the abutting members (216) and the driven wheel (120); and during the sliding process of the telescopic section (212) relative to the fixed section (211), the two abutting members (216) jointly keep the synchronous belt (215) and the driven wheel (120) always in a meshing state.

3. The lamp with a telescopic arm according to claim 1, characterized in that: The number of the limiting members (213) is at least two, and they limit the synchronous belt (215) at a position close to the driven wheel (120) and a position close to the driving wheel (320) respectively.

4. The lamp with a telescopic arm according to claim 1, wherein: The limiting member (213) includes a first limiting plate (2131) and a second limiting plate (2132) located on both sides of the synchronous belt (215) in the width direction thereof, and the first limiting plate (2131) and the second limiting plate (2132) respectively limit the synchronous belt (215) from departing from the plane where the driving wheel (320) and the driven wheel (120) are located in the width direction thereof.

5. The lamp with a telescopic arm according to claim 1, wherein: The telescopic section (212) is provided with a through hole (2122), the fixed section (211) is provided with locking positions (2112) at at least two heights, and the locking tongue (2141) of the locking member (214) passes through the through hole (2122) and selectively cooperates with one of the locking positions (2112) to lock the telescopic section (212).

6. The lamp with a telescopic arm according to claim 5, characterized in that: The locking member (214) includes a rotating rod (2142) pivotally connected to the telescopic section (212) and an operating rod (2144) for driving the rotating rod (2142) to rotate. The two ends of a connecting rod (2143) are respectively hinged to the end of the rotating rod (2142) and the locking tongue (2141), and the locking tongue (2141) is slidably set on the telescopic section (212).

7. The lamp with a telescopic arm according to claim 6, characterized in that: The rotating rod (2142) is fixedly connected to a steering rod (2145), and the operating rod (2144) is hinged to the steering rod (2145).

8. The lamp with a telescopic arm according to claim 6, characterized in that: It also includes a reset member (2146) that allows the locking tongue (2141) to always have a tendency to extend from the through hole (2122).

9. The lamp with a telescopic arm according to claim 1, characterized in that: The guide mechanism comprises two guide grooves (2113) on the fixed section (211) extending along the sliding direction of the telescopic section (212), and two sides of the telescopic section (212) are located in the guide grooves (2113).

10. The lamp with a telescopic arm according to claim 9, characterized in that: Gap adjustment plates (2123) are provided on both sides of the telescopic section (212); the gap adjustment plates (2123) are located in the guide groove (2113) and abut against the side walls of the guide groove (2113); and the distance between the gap adjustment plates (2123) and the telescopic section (212) is adjustable.

11. The lamp with a telescopic arm according to claim 9, characterized in that: The fixing section (211) further comprises a fixing plate (2114) for fixing the motor (300), and the guide groove (2113) is detachably fixed to the fixing plate (2114).

12. The lamp with a telescopic arm according to claim 1, characterized in that: The guide mechanism comprises a guide post (2115) provided on the transverse arm (220) and extending along the sliding direction of the telescopic section (212); the telescopic section (212) is provided with a guide hole (2124) sleeved outside the guide post (2115).

13. The lamp with a telescopic arm according to any one of claims 1, 9 to 12, characterized in that: It also includes an elastic member (2116) that causes the telescopic section (212) to always have a tendency to move away from the fixed section (211).

14. The lamp with a telescopic arm according to claim 1, characterized in that: When the longitudinal arm (210) is in a retracted state, the distance between the outer side wall of a section of the lamp head (100) where the pivot shaft (110) is arranged and the transverse arm (220) is less than 5 cm.

15. The lamp with a telescopic arm according to claim 1, characterized in that: It also includes a chassis that supports the arm (200) to rotate, and the chassis is pivotally connected to the horizontal arm (220) of the arm (200).

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