CN113464864A

CN113464864A - Mobile lighting device

Info

Publication number: CN113464864A
Application number: CN202110744783.4A
Authority: CN
Inventors: 吴卫; 王泽�; 冯剑文
Original assignee: Ningbo Gongniu Optoelectronics Technology Co Ltd
Current assignee: Ningbo Gongniu Optoelectronics Technology Co Ltd
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2021-10-01
Anticipated expiration: 2041-06-30
Also published as: CN113464864B

Abstract

The invention provides a mobile lighting device. The mobile lighting device includes: an illumination structure; the connecting piece comprises a gear, the lighting structure is provided with a tooth-shaped section, and the gear is meshed with the tooth-shaped section; the driving structure is connected with the gear and drives the gear to rotate so that the position of the lighting structure relative to the connecting piece can be adjusted under the combined action of the gear and the tooth-shaped section; and the limiting piece penetrates through at least one part of the lighting structure and is connected with the connecting piece so as to prevent the connecting piece from being separated from the lighting structure. The invention solves the problem that the position of the light source can not be quickly and accurately adjusted under the condition that the base of the mobile lighting device is not moved in the prior art.

Description

Mobile lighting device

Technical Field

The invention relates to the technical field of illumination, in particular to a mobile illumination device.

Background

At present, mobile lighting devices have become an integral part of people's daily lives. Taking a desk lamp as an example, the desk lamp used by people is mainly placed on a writing desk or a dining table for illumination.

At present, the horizontal adjustment mode of desk lamp light source position uses the pivot adjustment to be the main, and the rotation center of pivot adjustment is located base department, and when the lamp holder was adjusted, the light source can change for the position of hand, leads to writing the shadow grow, and the writing of giving the user brings inconvenience to be unfavorable for study or work, influence user's use and experience. That is, under the condition that the base is not moved, the position of the light source cannot be adjusted quickly and accurately by the existing desk lamp.

Therefore, the problem that the position of the light source cannot be adjusted quickly and accurately under the condition that the base of the movable lighting device is not moved exists in the prior art.

Disclosure of Invention

The invention mainly aims to provide a mobile lighting device to solve the problem that the position of a light source cannot be adjusted quickly and accurately under the condition that a base of the mobile lighting device is not moved in the prior art.

In order to achieve the above object, the present invention provides a mobile lighting device comprising: an illumination structure; the connecting piece comprises a gear, the lighting structure is provided with a tooth-shaped section, and the gear is meshed with the tooth-shaped section; the driving structure is connected with the gear and drives the gear to rotate so that the position of the lighting structure relative to the connecting piece can be adjusted under the combined action of the gear and the tooth-shaped section; and the limiting piece penetrates through at least one part of the lighting structure and is connected with the connecting piece so as to prevent the connecting piece from being separated from the lighting structure.

Further, the illumination structure is the arc, and the illumination structure has the arc light emitting area, and the profile of tooth section extends along the arc side of illumination structure.

Further, the tooth-shaped section is arranged on one side of the lighting structure, which is far away from the center of the arc.

Further, the gear is a plurality of, and a plurality of gear meshes in proper order, and one gear in a plurality of gears is connected with the drive structure, and another gear in a plurality of gears meshes with the profile of tooth section, and the gear that is connected with the drive structure is far away from the illumination structure relative to other gears.

Furthermore, the connecting piece also comprises a gear chamber structure, a plurality of gears are all accommodated in the gear chamber structure, one side of the gear chamber structure facing the lighting structure is provided with an opening, and at least one part of the gear meshed with the tooth-shaped section is exposed out of the opening.

Furthermore, a plurality of positioning columns are arranged in the gear chamber structure at intervals, and a plurality of gears are arranged on the positioning columns in a one-to-one correspondence mode.

Furthermore, the positioning column is provided with a central hole, and a driving shaft of the driving structure penetrates through the central hole to be connected with the gear.

Further, the driving structure includes: the operating part is positioned on the outer side of the connecting piece; the operating part is connected to the first end of the driving shaft, and the gear is connected with the part of the driving shaft extending into the connecting piece.

Further, the second end of the driving shaft protrudes to the outside of the connecting member, and the driving structure further includes: and a fixing cap coupled to the second end of the driving shaft to prevent the second end of the driving shaft from being separated from the coupling member.

Further, the driving shaft is in pin joint with the gear.

Further, the illumination structure has the groove that slides, and the profile of tooth section sets up in the groove that slides, and at least a part of connecting piece stretches into the inslot that slides to make gear and profile of tooth section meshing, the locating part includes: the limiting strip is provided with a fixing hole; the fixed screw, the cell wall in groove that slides set up with the hole that slides of profile of tooth section adaptation, fixed screw pass the fixed orifices in proper order, slide the hole and connecting piece threaded connection to prevent that connecting piece and lighting structure break away from and make the locating part follows the connecting piece and removes along sliding the hole.

Further, the connecting piece still includes a plurality of balls, and the connecting piece is provided with a plurality of recesses, and a plurality of recesses correspond with the hole of sliding and set up along the extending direction interval of the hole of sliding, at least partly holding respectively of a plurality of balls in a plurality of recesses and with spacing butt to make spacing and connecting piece rolling contact.

By applying the technical scheme of the invention, the mobile lighting device comprises a lighting structure, a connecting piece, a driving structure and a limiting piece, wherein the connecting piece comprises a gear, the lighting structure is provided with a tooth-shaped section, the gear is meshed with the tooth-shaped section, the driving structure is connected with the gear, the driving structure drives the gear to rotate so that the lighting structure can be adjusted relative to the connecting piece under the combined action of the gear and the tooth-shaped section, and thus the driving structure drives the gear to rotate so as to drive the lighting structure to be adjusted relative to the connecting piece, so that a user can conveniently, quickly and accurately adjust the position of a light source according to the requirement.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic structural diagram of a mobile lighting device in one embodiment of the invention;

FIG. 2 illustrates an exploded view of the connecting member, drive structure and stop member in one embodiment of the present invention;

FIG. 3 is a schematic diagram illustrating the connection of the connecting member, the driving structure and the limiting member according to an embodiment of the present invention;

FIG. 4 is a schematic view of a connection member, a limiting member and an illumination structure according to an embodiment of the present invention;

fig. 5 shows a cross-sectional view of a mobile lighting device in a specific embodiment of the invention.

Wherein the figures include the following reference numerals:

10. an illumination structure; 11. a tooth-shaped section; 12. a sliding groove; 121. a sliding hole; 20. a connecting member; 21. a gear; 22. a gear chamber structure; 221. an upper gear chamber; 222. a lower gear chamber; 23. a positioning column; 24. a ball bearing; 25. a groove; 30. a drive structure; 31. an operation section; 32. a drive shaft; 33. a fixing cap; 40. a limiting member; 41. a limiting strip; 411. a fixing hole; 42. and fixing the screw.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

In the present invention, unless specified to the contrary, use of the terms of orientation such as "upper, lower, top, bottom" or the like, generally refer to the orientation as shown in the drawings, or to the component itself in a vertical, perpendicular, or gravitational orientation; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the invention.

It is to be understood that the above-described embodiments are only a few, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a mobile lighting device, aiming at solving the problem that the position of a light source cannot be quickly and accurately adjusted under the condition that a base of the mobile lighting device is not movable in the prior art.

As shown in fig. 1, 4 to 5, the mobile lighting device includes a lighting structure 10, a connecting member 20, a driving structure 30 and a limiting member 40. The connecting member 20 comprises a gear 21, the lighting structure 10 is provided with a toothed section 11, and the gear 21 is engaged with the toothed section 11. The driving structure 30 is connected to the gear 21, and the driving structure 30 drives the gear 21 to rotate so that the lighting structure 10 is adjustable in position relative to the connecting member 20 under the combined action of the gear 21 and the toothed section 11. The stopper 40 penetrates at least a portion of the lighting structure 10 and is coupled to the connection member 20 to prevent the connection member 20 from being detached from the lighting structure 10.

By moving the lighting device comprising the lighting structure 10, the connecting member 20, the driving structure 30 and the limiting member 40, the connecting member 20 comprises the gear 21, the lighting structure 10 is provided with the toothed section 11, the gear 21 is meshed with the toothed section 11, the driving structure 30 is connected with the gear 21, the driving structure 30 drives the gear 21 to rotate so that the lighting structure 10 can adjust the position relative to the connecting member 20 under the combined action of the gear 21 and the toothed section 11, so that the gear 21 is driven to rotate by the driving structure 30, thereby driving the lighting structure 10 to be adjustable in position relative to the connecting member 20, enabling a user to conveniently, quickly and accurately adjust the position of the lighting structure 10 according to the requirement, thereby quickly and accurately adjusting the position of the light source, and furthermore, the limiting member 40 passes through at least a portion of the illuminating structure 10 and is connected with the connecting member 20, so as to prevent the connecting member 20 from being separated from the illuminating structure 10, and ensure the connection firmness between the illuminating structure 10 and the connecting member 20.

In this embodiment, the lighting structure 10 is arc-shaped. The lighting structure 10 has an arcuate light emitting face. The toothed section 11 extends along the curved side of the lighting structure 10. That is, the tooth section 11 is an arc-shaped section.

In the present embodiment, the tooth-shaped section 11 is disposed on a side of the lighting structure 10 away from the center of the arc. That is, the toothed segments 11 are disposed on the arcuate outer side of the lighting structure 10. Accordingly, the center of the arc of the lighting structure 10 is located on the user side. In particular, the curvature of the lighting structure 10 is the same as the curvature of the toothed segment 11. In addition, the curvature of the curved light emitting surface is also the same as the curvature of the lighting structure 10. In this way, the luminous surface of the lighting structure 10 is adapted to the shape of the lighting structure 10. The above arrangement makes the motion trajectory of the lighting structure 10 arc-shaped, and the curvature of the motion trajectory is also the same as that of the lighting structure 10. And then the illumination structure 10 can perform annular adjustment by taking the center of the target illumination area as a rotation circle center, so that the phenomenon that the shadow generated by the hand and other parts of the user at the target illumination area is enlarged is avoided, and the illumination experience of the user is improved.

The target irradiation region is a region to be illuminated by the illumination structure 10. For example, when a user needs illumination in a dark environment to perform writing or reading operations, the region where the book and the user's hand are located is the target illumination region.

As shown in fig. 2 to 3 and 5, the number of gears 21 is plural, and the plural gears 21 are sequentially engaged with each other. One gear 21 of the plurality of gears 21 is connected with the driving structure 30 and another gear 21 of the plurality of gears 21 is engaged with the toothed section 11, the gear 21 connected with the driving structure 30 being distant from the lighting structure 10 with respect to the other gears 21. Specifically, in the present embodiment, there are two gears 21, and the two gears 21 are respectively a driving gear and a driven gear, the driving gear is connected to the driving structure 30, and the driven gear is engaged with the tooth-shaped section 11. The driving gear is remote from the lighting structure 10 relative to the driven gear. This enables the drive structure 30 to be kept at a distance from the lighting structure 10, thereby ensuring that the drive structure 30 has sufficient operating space. Of course, the position relationship between the driving gear and the driven gear may be set side by side along the extending direction of the tooth-shaped section 11, and may be selected according to actual requirements.

As shown in fig. 2-5, the coupling 20 also includes a gear chamber structure 22. The plurality of gears 21 are all accommodated in the gear chamber structure 22, and one side of the gear chamber structure 22 facing the lighting structure 10 is provided with an opening, and at least one part of the gear 21 meshed with the tooth-shaped section 11 is exposed out of the opening. Specifically, in the present embodiment, at least a portion of the driven gear is exposed to the opening to mesh with the tooth section 11. In addition, the connecting member 20 further includes a connecting section sequentially connected to the gear chamber structure 22, and the connecting section is located at an end of the gear chamber structure 22 far away from the lighting structure 10, so as to be connected to other structures such as a support frame of the mobile lighting device.

As shown in fig. 2 and 5, a plurality of positioning posts 23 are spaced apart from each other in the gear chamber structure 22. The plurality of gears 21 are disposed on the plurality of positioning posts 23 in a one-to-one correspondence. Specifically, in this embodiment, the number of the positioning columns 23 is two, the driving gear and the driven gear are respectively disposed on the two positioning columns 23, and the distance between the two positioning columns 23 is just enough to enable the driving gear and the driven gear to be meshed.

As shown in fig. 2 to 5, the driving structure 30 includes an operating portion 31 and a driving shaft 32. The operating portion 31 is located outside the link 20. The operating portion 31 is connected to a first end of the drive shaft 32, and the gear 21 is connected to a portion of the drive shaft 32 extending into the connecting member 20. Specifically, the operating portion 31 has a disc-shaped configuration, and the portion of the driving shaft 32 extending into the gear chamber structure 22 of the connecting member 20 is connected to the driving gear. When the relative position between the lighting structure 10 and the connecting member 20 needs to be adjusted, the user rotates the operating portion 31 to drive the driving gear to rotate, and through the meshing transmission, the driving gear drives the driven gear to rotate, so as to drive the driven gear to move relative to the tooth-shaped section 11, thereby realizing the relative movement between the lighting structure 10 and the connecting member 20.

In this embodiment, the positioning post 23 has a central hole through which a driving shaft 32 of the driving structure 30 is connected with the gear 21. Specifically, the driving shaft 32 is connected to the driving gear, so that the operating portion 31 is drivingly connected to the driving gear.

In an embodiment not shown, the drive structure 30 further comprises an electric motor. The motor is in driving connection with the operation part 31, and the operation part 31 is driven by the motor to rotate. Thus, the rotation angle or the rotation number of the operation part 31 can be controlled by controlling the opening and closing and the operation time of the motor, so that the relative position between the lighting structure 10 and the connecting member 20 can be adjusted according to the requirement. This is changed from manual operation to automatic operation, so that the user can adjust the relative position between the lighting structure 10 and the connecting member 20 more conveniently and accurately.

As shown in fig. 2 to 5, the second end of the driving shaft 32 protrudes to the outside of the coupling member 20, and the driving structure 30 further includes a fixing cap 33, and the fixing cap 33 is coupled to the second end of the driving shaft 32 to prevent the second end of the driving shaft 32 from being separated from the coupling member 20. Specifically, the drive shaft 32 is disposed through the gear chamber structure 22. The gear chamber structure 22 includes an upper gear chamber 221 and a lower gear chamber 222 which are engaged up and down. The upper gear chamber 221 and the lower gear chamber 222 are provided with holes corresponding to the central hole of the positioning column 23, the driving gear is provided with a central connecting hole, the driving shaft 32 sequentially penetrates through the holes of the lower gear chamber 222, the central hole of the positioning column 23, the central connecting hole of the driving gear and the hole of the upper gear chamber 221 and extends out of the outer side of the upper gear chamber 221, and then is connected with the fixing cap 33, so that the whole driving structure 30 is arranged on the gear chamber structure 22 in a penetrating mode.

In one embodiment, not shown, the drive structure 30 does not include a retaining cap 33. The lower gear chamber 222 has an opening disposed corresponding to the center hole of the positioning post 23. The driving shaft 32 passes through the opening of the lower gear chamber 222 and the central hole of the positioning column 23 in sequence and then is connected with the driving gear. Therefore, the driving structure 30 cannot be separated from the connecting piece 20 by the fixing and limiting action of the driving gear and the positioning column 23.

In the present embodiment, the driving shaft 32 is pinned with the gear 21. Specifically, the driving shaft 32 is pinned to the driving gear. Of course, other fastening connection manners between the driving shaft 32 and the driving gear may be adopted, and may be selected according to actual requirements.

As shown in fig. 1 to 5, the illumination structure 10 has a slide groove 12. The toothed section 11 is arranged in the sliding groove 12, and at least a part of the connecting piece 20 extends into the sliding groove 12, so that the gear 21 is meshed with the toothed section 11. The limiting member 40 includes a limiting bar 41 and a fixing screw 42. The position-limiting bar 41 has a fixing hole 411, a sliding hole 121 matching with the tooth-shaped section 11 is formed in a wall of the sliding groove 12, and a fixing screw 42 sequentially passes through the fixing hole 411 and the sliding hole 121 to be in threaded connection with the connecting member 20, so as to prevent the connecting member 20 from being separated from the lighting structure 10 and enable the position-limiting member 40 to move along the sliding hole 121 along with the connecting member 20. Specifically, in this embodiment, two ends of the limiting bar 41 are provided with two fixing holes 411, two fixing screws 42 are provided, the connecting member 20 is also provided with two corresponding threaded holes, and the two fixing screws 42 respectively penetrate through the fixing holes 411 and the sliding holes 121 and are screwed into the threaded holes, so that the limiting bar 41 is connected with the connecting member 20. The sliding hole 121 is opened on the groove wall at the top of the sliding groove 12, and the width of the limiting strip 41 is greater than that of the sliding hole 121, so that the limiting strip 41 can stop at the sliding hole 121, thereby preventing the connecting member 20 from being separated from the lighting structure 10.

Specifically, since the tooth-shaped section 11 is arc-shaped, the sliding hole 121 is correspondingly arc-shaped. And the curvature of the slip hole 121 is the same as that of the tooth section 11.

As shown in fig. 2, the coupler 20 further includes a plurality of balls 24. The connecting piece 20 is provided with a plurality of recesses 25, and a plurality of recesses 25 correspond with the hole 121 that slides and set up along the extending direction interval of the hole 121 that slides, and at least some holding in a plurality of recesses 25 and with spacing 41 butt of a plurality of balls 24 respectively to make spacing 41 and connecting piece 20 rolling contact. That is, the portion of the ball 24 exposed out of the groove 25 is accommodated in the slide hole 121. Through set up ball 24 between spacing strip 41 and connecting piece 20, be favorable to reducing contact friction for spacing strip 41 can follow connecting piece 20 along sliding hole 121 and slide more smoothly, makes the user feel more fine and smooth when adjusting relative position between illumination structure 10 and connecting piece 20, and it is more smooth to slide, improves user experience.

As shown in fig. 3, the upper gear chamber 221 is partially snap-fitted into the lower gear chamber 222, and the lower gear chamber 222 has a docking platform protruding toward the lighting structure 10 after being snap-fitted into the upper gear chamber 221. The docking platform extends into the sliding groove 12 to dock with the lighting structure 10. Specifically, two bosses are arranged on the butt joint platform at intervals. An opening for exposing the driven gear is formed between the two bosses. The limiting member 40 is connected with the boss of the connecting member 20. A plurality of grooves 25 are provided on the two bosses, respectively. The two bosses are respectively provided with the threaded holes, and two ends of the limiting strip 41 are respectively in threaded connection with the two bosses through two fixing screws 42.

In the present exemplary embodiment, the side of the connecting element 20 facing the lighting structure 10 is adapted to the shape of the outer side of the lighting structure 10. Specifically, the interface between the connecting member 20 and the lighting structure 10 is an inclined plane. This can increase the security of the connection between the attachment member 20 and the lighting structure 10.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects: by moving the lighting device comprising the lighting structure 10, the connecting member 20, the driving structure 30 and the limiting member 40, the connecting member 20 comprises the gear 21, the lighting structure 10 is provided with the toothed section 11, the gear 21 is meshed with the toothed section 11, the driving structure 30 is connected with the gear 21, the driving structure 30 drives the gear 21 to rotate so that the lighting structure 10 can adjust the position relative to the connecting member 20 under the combined action of the gear 21 and the toothed section 11, so that the gear 21 is driven to rotate by the driving structure 30, thereby driving the lighting structure 10 to be adjustable in position relative to the connecting member 20, enabling a user to conveniently, quickly and accurately adjust the position of the lighting structure 10 according to the requirement, thereby quickly and accurately adjusting the position of the light source, and furthermore, the limiting member 40 passes through at least a portion of the illuminating structure 10 and is connected with the connecting member 20, so as to prevent the connecting member 20 from being separated from the illuminating structure 10, and ensure the connection firmness between the illuminating structure 10 and the connecting member 20.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A mobile lighting device, comprising:

an illumination structure (10);

the connecting piece (20), the connecting piece (20) comprises a gear (21), the lighting structure (10) is provided with a tooth-shaped section (11), and the gear (21) is meshed with the tooth-shaped section (11);

a driving structure (30), wherein the driving structure (30) is connected with the gear (21), the driving structure (30) drives the gear (21) to rotate so that the position of the lighting structure (10) is adjustable relative to the connecting piece (20) under the combined action of the gear (21) and the tooth-shaped section (11);

a stopper (40), the stopper (40) passing through at least a portion of the illumination structure (10) and being connected to the connector (20) to prevent the connector (20) from being detached from the illumination structure (10).

2. A mobile lighting device according to claim 1, wherein the lighting structure (10) is arc-shaped, the lighting structure (10) having an arc-shaped light emitting surface, the toothed section (11) extending along an arc-shaped side of the lighting structure (10).

3. A mobile lighting device according to claim 2, characterized in that the toothed section (11) is arranged on the side of the lighting structure (10) facing away from the centre of the arc.

4. A mobile lighting device according to claim 1, wherein said toothed wheel (21) is plural, a plurality of said toothed wheels (21) being sequentially engaged, one of said toothed wheels (21) of said plurality of toothed wheels (21) being connected to said driving structure (30) and another of said toothed wheels (21) of said plurality of toothed wheels (21) being engaged with said toothed section (11), said toothed wheel (21) connected to said driving structure (30) being distanced from said lighting structure (10) with respect to the other of said toothed wheels (21).

5. A mobile lighting device according to claim 4, characterized in that the connection piece (20) further comprises a gear chamber structure (22), a plurality of gears (21) being housed in the gear chamber structure (22), and a side of the gear chamber structure (22) facing the lighting structure (10) having an opening, at least a portion of the gears (21) meshing with the toothed section (11) being exposed to the opening.

6. The mobile lighting device as claimed in claim 5, wherein a plurality of positioning pillars (23) are arranged at intervals in the gear chamber structure (22), and a plurality of gears (21) are arranged on the plurality of positioning pillars (23) in a one-to-one correspondence manner.

7. Mobile lighting device as claimed in claim 6, characterized in that the positioning column (23) has a central hole through which a drive shaft (32) of the drive structure (30) is connected with the gear wheel (21).

8. A mobile lighting device according to any one of claims 1 to 6, wherein the drive structure (30) comprises:

an operating portion (31), the operating portion (31) being located outside the connecting member (20);

the operating part (31) is connected to a first end of the driving shaft (32), and the gear (21) is connected with a part of the driving shaft (32) extending into the connecting piece (20).

9. The mobile lighting device of claim 8, wherein the second end of the drive shaft (32) protrudes outside of the connector (20), the drive structure (30) further comprising:

a fixing cap (33), the fixing cap (33) being connected with the second end of the driving shaft (32) to prevent the second end of the driving shaft (32) from being detached from the connecting member (20).

10. A mobile lighting device according to claim 8, characterized in that there is a pin connection between the drive shaft (32) and the gear wheel (21).

11. The mobile lighting device according to any one of claims 1 to 7, wherein the lighting structure (10) has a sliding slot (12), the toothed segment (11) is disposed in the sliding slot (12), at least a portion of the connecting member (20) protrudes into the sliding slot (12) to engage the gear (21) with the toothed segment (11), and the stopper (40) comprises:

the limiting strip (41), the limiting strip (41) is provided with a fixing hole (411);

the fixing screw (42), the cell wall of the groove of sliding (12) seted up with the hole of sliding (121) of profile of tooth section (11) looks adaptation, fixing screw (42) pass in proper order fixed orifices (411) slide hole (121) with connecting piece (20) threaded connection, in order to prevent connecting piece (20) with illumination structure (10) break away from and make locating part (40) follow slide hole (121) connecting piece (20) remove.

12. The mobile lighting device according to claim 11, wherein the connecting member (20) further comprises a plurality of balls (24), the connecting member (20) is provided with a plurality of grooves (25), the plurality of grooves (25) are arranged corresponding to the sliding hole (121) and are arranged at intervals along the extending direction of the sliding hole (121), and at least a part of the plurality of balls (24) is accommodated in the plurality of grooves (25) and abuts against the limiting strip (41) so that the limiting strip (41) is in rolling contact with the connecting member (20).