A lamp backfold adjusting device and its adjusting method

Abstract

This invention discloses a lamp anti-reverse folding adjustment device and its adjustment method, belonging to the technical field of lamp accessories. It includes an upper lampshade, a lower lamp holder, and a hinge assembly. The hinge assembly comprises a symmetrical upper hinge seat, a central lower hinge seat, and a linkage rod. The linkage rod is fitted with a bushing and engages with the lower hinge seat. One end is fitted with a locking seat, which contains an adjustment component. The locking seat includes a locking sleeve and a locking rod. The linkage rod is fitted with a gear. The adjustment component includes an adjustment block with a toothed buckle, a rotating shaft, and a return spring. A protrusion controls the rotation of the adjustment block. The adjustment method includes three modes: free opening and closing, angle locking, and angle increment. The state is switched by pressing the protrusion, and the unidirectional engagement of the toothed buckle and the gear achieves anti-reverse operation. This invention has a compact structure, is easy to adjust without tools, provides reliable anti-reverse operation, has low wear, and is suitable for various lamps requiring angle adjustment, making it highly practical and valuable for widespread application.

Description

Technical Field

[0001] This invention relates to the field of lighting fixture accessories technology, and in particular to a lighting fixture anti-reverse folding adjustment device and its adjustment method. Background Technology

[0002] The existing lampshade and lamp holder connection structure of lamps (such as table lamps and portable outdoor lamps) mostly adopts simple hinge or bolt locking methods, which have the following defects: First, the simple hinge structure has no anti-return function, and the lampshade is prone to shifting due to gravity or vibration after adjustment, resulting in poor reliability of angle fixation; Second, the bolt locking method requires the use of tools, making the adjustment process cumbersome and unable to achieve stepless incremental adjustment; Third, some adjustment structure components are loosely assembled, and are prone to wear and jamming after long-term use, affecting the service life. Summary of the Invention

[0003] The purpose of this invention is to provide a lamp anti-reverse folding adjustment device with a reasonable structural design, simple operation, and stable anti-reverse effect, and to provide a corresponding adjustment method.

[0004] To achieve the above objectives, the present invention provides a lamp anti-reverse folding adjustment device, comprising a lamp body, the lamp body including an upper lampshade and a lower lamp holder, the upper lampshade and the lower lamp holder being hinged together by a hinge assembly; the hinge assembly including two upper hinge seats symmetrically arranged on one side of the lower surface of the upper lampshade, and a lower hinge seat fixedly installed on the middle of one side of the upper surface of the lower lamp holder, the lower hinge seat being located between the two upper hinge seats and connected to the upper hinge seats through a linkage rod; a bushing is fitted on the outer wall of one end of the linkage rod passing through the interior of the lower hinge seat, the outer surface of the bushing engaging and limiting the movement with the inner wall of the lower hinge seat, and a locking seat is fixedly fitted on one end of the linkage rod passing through the interior of one side of the upper hinge seat, the locking seat being fixedly connected to the upper lampshade, and the locking seat having an adjustment component for adjusting the opening and closing angle of the upper lampshade.

[0005] Preferably, the bushing and the linkage rod are coaxially fitted together, and the outer wall of the bushing is fixed to the inner wall of the lower hinge seat by an interference fit.

[0006] Preferably, the locking seat includes an integrally formed locking sleeve and a locking rod, with the lower end of the locking rod fixedly connected to the top surface of the locking sleeve; the outer surface of the locking sleeve is symmetrically provided with slots, and the inner wall of the upper hinge seat is correspondingly provided with a locking block that matches the slot, and the locking block and the slot form a locking and positioning engagement.

[0007] Preferably, the corresponding end of the linkage rod passes through the circular through hole in the center of the locking sleeve, and the corresponding section of the linkage rod has a fixedly fitted shaft tooth on its outer wall. The shaft tooth is coaxial with the linkage rod and rotates synchronously. The upper end of the locking rod passes through the pre-reserved slot in the upper hinge seat and engages with the inside of the upper lampshade. An adjustment groove is opened inside the locking rod, and the adjustment groove is connected to the circular through hole in the locking sleeve. The adjustment component is embedded inside the adjustment groove.

[0008] Preferably, the adjustment assembly includes an adjustment block, a rotating shaft, and a toothed buckle. The rotating shaft extends laterally through the middle of the adjustment block, and both ends of the rotating shaft are fixedly connected to the inner walls of the two sides of the adjustment groove, respectively. The adjustment block is rotatably arranged around the rotating shaft as the axis. The toothed buckle is integrally arranged at the lower end of the adjustment block, and the toothed buckle is adapted to the tooth groove of the shaft tooth to form a one-way meshing locking structure.

[0009] Preferably, the upper surface of the adjusting block has a first groove and a second groove, and a reset spring is provided inside the adjusting groove along the length of the linkage rod. The end of the reset spring is fitted with the first groove and the second groove. A protrusion is integrally provided on one side of the upper end of the adjusting block. The protrusion extends to the outside through the opening on the surface of the locking rod. A limiting groove is provided between the protrusion and the toothed buckle. A third groove is provided on the upper surface of the protrusion.

[0010] A method for adjusting a lamp anti-reverse folding adjustment device includes the following steps: S1. In the free opening and closing mode, the protrusion on the adjusting block is at the upper end of the opening on the surface of the locking rod. At this time, the return spring is engaged in the first groove, the tooth buckle is completely separated from the tooth groove on the surface of the shaft tooth, the position of the adjusting block remains fixed, and the locking sleeve rotates freely relative to the linkage rod, thereby realizing the unrestricted and arbitrary opening and closing of the upper lamp cover relative to the lower lamp holder. S2. Press down on the protrusion of the adjusting block to drive the adjusting block to rotate clockwise around the pivot until the upper end of the limiting groove engages with the lower end of the locking rod opening. At this time, the reset spring switches to engage inside the second groove, the toothed buckle meshes with the toothed groove on the shaft tooth surface and locks, the position of the adjusting block is fixed, and the locking sleeve and the linkage rod form a rigid lock that cannot rotate relative to each other, thereby fixing the opening angle of the upper lamp cover and the lower lamp holder. S3. In the fixed angle locking mode, rotate the upper lamp cover upwards. The locking lever rotates counterclockwise in sync with the upper lamp cover, causing the adjusting block to deflect counterclockwise in sync. The toothed buckle slides backwards and engages with the rear tooth groove of the shaft tooth. When the upper lamp cover stops rotating at the target angle, the toothed buckle automatically springs into place and locks into the corresponding shaft tooth groove under the elastic force of the return spring, thus increasing the opening and closing angle and locking it in place.

[0011] Therefore, the present invention, by employing the above-mentioned anti-reverse folding adjustment device and method for lamps, has the following technical advantages: (1) The present invention integrates the hinge assembly and the locking seat, the parts are tightly assembled, the bushing reduces wear and extends service life; the shaft tooth buckle structure is simple, the anti-return effect is stable, and the angle deviation is avoided.

[0012] (2) The present invention provides three adjustment modes: free opening and closing, angle locking, and angle increment. No tools are needed; the mode can be switched by pressing the protrusion. The operation is simple and meets diverse usage scenarios.

[0013] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a lamp anti-reverse folding adjustment device according to the present invention; Figure 2 This is a schematic diagram showing the hinge assembly of a lamp anti-reverse folding adjustment device according to the present invention. Figure 3 This invention relates to a lamp anti-reverse folding adjustment device. Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the unlocked state of the upper lampshade and lower lamp holder in a lamp anti-reverse folding adjustment device of the present invention; Figure 5 This is a schematic diagram of the fixed state of the upper lampshade and the lower lamp holder in a lamp anti-reverse folding adjustment device of the present invention.

[0015] Figure Labels 1. Upper lampshade; 2. Lower lamp holder; 3. Hinge assembly; 31. Upper hinge seat; 311. Locking block; 32. Lower hinge seat; 33. Linkage rod; 34. Bushing; 4. Locking seat; 41. Locking sleeve; 411. Slot; 412. Circular through hole; 42. Locking rod; 421. Adjustment groove; 422. Opening; 5. Adjustment assembly; 51. Adjustment block; 511. First groove; 512. Second groove; 513. Limiting groove; 52. Rotating shaft; 53. Gear; 54. Return spring; 55. Protrusion; 551. Third groove; 6. Shaft tooth; 61. Gear groove. Detailed Implementation

[0016] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0018] like Figures 1 to 3As shown, a lamp anti-reverse folding adjustment device includes a lamp body, which includes an upper lampshade 1 and a lower lamp holder 2. The upper lampshade 1 and the lower lamp holder 2 are hinged together by a hinge shaft assembly 3 to achieve relative opening and closing rotation.

[0019] The hinge assembly 3 includes two upper hinge seats 31 symmetrically arranged on one side of the lower surface of the upper lampshade 1, and a lower hinge seat 32 integrally installed on the middle of one side of the upper surface of the lower lamp holder 2. The lower hinge seat 32 is embedded between the two upper hinge seats 31, and the three are connected by a linkage rod 33 to ensure the linkage stability between the upper lampshade 1 and the lower lamp holder 2. A bushing 34 is fitted on the outer wall of one end of the linkage rod 33 that passes through the lower hinge seat 32. The bushing 34 is made of wear-resistant engineering plastic, and its outer surface is fitted and fixed to the inner wall of the lower hinge seat 32 by an interference fit. This not only buffers the rotation between the linkage rod 33 and the lower hinge seat 32, but also prevents the linkage rod 33 from moving axially, thus improving the structural stability.

[0020] One end of the linkage rod 33, which passes through the interior of the upper hinge seat 31 on one side, is fixedly fitted with a locking seat 4 via a flat key. The locking seat 4 is fixedly connected to the upper lampshade 1, and the locking seat 4 has an adjustment component 5 inside for adjusting the opening and closing angle of the upper lampshade 1, realizing the angle locking and adjustment functions. The locking seat 4 includes an integrally formed locking sleeve 41 and a locking rod 42. The lower end of the locking rod 42 is coaxially fixedly connected to the top surface of the locking sleeve 41. It adopts an injection molding process, which has high structural strength. Two arc-shaped slots 411 are symmetrically opened on the outer surface of the locking sleeve 41. The inner wall of the upper hinge seat 31 has a corresponding integrally formed locking block 311 that matches the slot 411. The locking block 311 and the slot 411 form a circumferential locking and positioning fit to prevent the locking sleeve 41 from rotating relative to the upper hinge seat 31, ensuring accurate power transmission.

[0021] The corresponding end of the linkage rod 33 is inserted into the circular through hole 412 in the center of the locking sleeve 41. The outer wall of the corresponding section of the linkage rod 33 is fixedly fitted with the shaft tooth 6 by welding or tight fit. The shaft tooth 6 is coaxially set with the linkage rod 33 and rotates synchronously. The upper end of the locking rod 42 passes through the long strip-shaped slot reserved in the upper hinge seat 31 and is engaged and fixed with the mounting slot inside the upper lamp cover 1. An adjustment groove 421 is opened axially inside the locking rod 42. The adjustment groove 421 is connected to the circular through hole 412 of the locking sleeve 41. The adjustment component 5 is embedded in the adjustment groove 421 to achieve a compact layout.

[0022] The adjustment assembly 5 includes an adjustment block 51, a rotating shaft 52, and a toothed buckle 53. The rotating shaft 52 passes through the shaft hole in the middle of the adjustment block 51 laterally. Both ends of the rotating shaft 52 are fixed with the mounting holes on the inner walls of the two sides of the adjustment groove 421 by interference fit. The adjustment block 51 can rotate flexibly with the rotating shaft 52 as the axis. The toothed buckle 53 is integrally set at the lower end of the adjustment block 51. The end of the toothed buckle 53 is arc-shaped and matches the tooth groove 61 of the shaft tooth 6 to form a one-way meshing locking structure.

[0023] The upper surface of the adjusting block 51 has a first groove 511 and a second groove 512 along the rotation trajectory. The distance between the two grooves matches the rotation stroke of the adjusting block 51. A return spring 54 is set inside the adjusting groove 421 along the length of the linkage rod 33. The return spring 54 is made of stainless steel. One end of the return spring 54 abuts against the spring seat on the inner wall of the adjusting groove 421, and the other end fits into the first groove 511 and the second groove 512. The spring force is used to position and reset the adjusting block 51. A protrusion 55 is integrally set on one side of the upper end of the adjusting block 51. The protrusion 55 extends to the outside through the rectangular opening 422 on the surface of the locking rod 42. An arc-shaped limiting groove 513 is set between the protrusion 55 and the toothed buckle 53. The limiting groove 513 fits into the edge of the opening 422 of the locking rod 42 to limit the adjustment block 51 after rotation. An arc-shaped third groove 551 is set on the upper surface of the protrusion 55 to facilitate pressing operation with fingers or tools and improve ease of use.

[0024] A method for adjusting a lamp anti-reverse folding adjustment device includes the following steps: S1. As Figure 4 As shown, in the initial state, the protrusion 55 on the adjusting block 51 is at the upper end of the opening 422 on the surface of the locking rod 42. At this time, the return spring 54 is engaged in the first groove 511 under its own elastic force. The toothed buckle 53 is completely separated from the tooth groove 61 on the surface of the shaft tooth 6 under the action of the adjusting block 51. The locking sleeve 41 can rotate freely relative to the linkage rod 33, thereby realizing the unrestricted opening and closing of the upper lamp cover 1 relative to the lower lamp holder 2, meeting the user's need to quickly adjust the posture of the lamp.

[0025] S2. For example Figure 5 As shown, when it is necessary to fix the opening angle of the upper lampshade 1 and the lower lamp holder 2, press down on the protrusion 55 of the adjusting block 51. The protrusion 55 is forced to drive the adjusting block 51 to rotate clockwise around the rotating shaft 52 until the upper end of the limiting groove 513 engages with the lower end of the opening 422 on the surface of the locking rod 42. At this time, the return spring 54 switches to engage with the second groove 512 as the adjusting block 51 rotates. The toothed buckle 53 rotates synchronously and engages with the toothed groove 61 on the surface of the shaft tooth 6 to lock it. Since the locking sleeve 41 and the upper hinge seat 31 are fixed by the slot 411 and the locking block 311, and the linkage rod 33 and the lower lamp holder 2 are fixed by the lower hinge seat 32, the locking sleeve 41 and the linkage rod 33 form a rigid lock and cannot rotate relative to each other. Thus, the opening angle of the upper lampshade 1 and the lower lamp holder 2 is firmly fixed to prevent displacement.

[0026] S3. Based on the angle locking mode, if it is necessary to increase the opening angle between the upper lampshade 1 and the lower lamp holder 2, rotate the upper lampshade 1 upwards. The upper lampshade 1 drives the locking rod 42 to rotate counterclockwise in sync. The locking rod 42 drives the toothed buckle 53 to move synchronously through the adjusting block 51. Since the toothed buckle 53 and the shaft tooth 6 are engaged in a one-way manner, the toothed buckle 53 slides backward along the tooth surface of the shaft tooth 6 and engages in the tooth groove 61 of the rear section of the shaft tooth 6. During this process, the return spring 54 is slightly compressed. When the upper lampshade 1 rotates to the target angle and stops applying force, under the elastic force of the return spring 54, the adjusting block 51 rotates in the opposite direction, and the toothed buckle 53 automatically springs into the corresponding position of the shaft tooth 6 tooth groove 61 and locks, completing the increase and fixation of the opening angle. This process can be repeated to achieve stepless incremental adjustment to match user needs.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A lamp anti-reverse folding adjustment device, comprising a lamp body, characterized in that: The lamp body includes an upper lampshade and a lower lamp holder, which are hinged together by a hinge assembly. The hinge assembly includes two upper hinge seats symmetrically arranged on one side of the lower surface of the upper lampshade, and a lower hinge seat fixedly installed in the middle of one side of the upper surface of the lower lamp holder. The lower hinge seat is located between the two upper hinge seats and is connected to the upper hinge seats through a linkage rod. A bushing is fitted on the outer wall of one end of the linkage rod that passes through the lower hinge seat. The outer surface of the bushing engages and limits the movement with the inner wall of the lower hinge seat. A locking seat is fixedly assembled on one end of the linkage rod that passes through the upper hinge seat on one side. The locking seat is fixedly connected to the upper lampshade, and the locking seat has an adjustment component inside for adjusting the opening and closing angle of the upper lampshade.

2. The lamp anti-reverse folding adjustment device according to claim 1, characterized in that: The bushing and the linkage rod are coaxially fitted together, and the outer wall of the bushing is fixed to the inner wall of the lower hinge seat by an interference fit.

3. The lamp anti-reverse folding adjustment device according to claim 2, characterized in that: The locking seat includes an integrally formed locking sleeve and a locking rod, with the lower end of the locking rod fixedly connected to the top surface of the locking sleeve; the outer surface of the locking sleeve is symmetrically provided with slots, and the inner wall of the upper hinge seat is provided with corresponding locking blocks that are adapted to the slots, and the locking blocks and slots form a locking and positioning engagement.

4. A lamp anti-reverse folding adjustment device according to claim 3, characterized in that: The corresponding end of the linkage rod passes through the circular through hole in the center of the locking sleeve, and the corresponding section of the linkage rod has a fixedly fitted shaft tooth on its outer wall. The shaft tooth is coaxial with the linkage rod and rotates synchronously. The upper end of the locking rod passes through the pre-reserved slot in the upper hinge seat and engages with the inside of the upper lampshade. An adjustment groove is opened inside the locking rod, and the adjustment groove is connected to the circular through hole in the locking sleeve. The adjustment component is embedded inside the adjustment groove.

5. A lamp anti-reverse folding adjustment device according to claim 4, characterized in that: The adjustment assembly includes an adjustment block, a rotating shaft, and a toothed buckle. The rotating shaft extends laterally through the middle of the adjustment block, and its two ends are fixedly connected to the inner walls of the two sides of the adjustment groove. The adjustment block is rotatable around the rotating shaft. The toothed buckle is integrally set at the lower end of the adjustment block, and the toothed buckle is adapted to the tooth groove of the shaft tooth to form a one-way meshing locking structure.

6. A lamp anti-reverse folding adjustment device according to claim 5, characterized in that: The upper surface of the adjusting block has a first groove and a second groove. A reset spring is provided inside the adjusting groove along the length of the linkage rod. The end of the reset spring is fitted with the first groove and the second groove. A protrusion is integrally provided on one side of the upper end of the adjusting block. The protrusion extends to the outside through the opening on the surface of the locking rod. A limiting groove is provided between the protrusion and the toothed buckle. A third groove is provided on the upper surface of the protrusion.

7. An adjustment method based on the lamp anti-reverse folding adjustment device as described in claim 6, characterized in that, Includes the following steps: S1. In the free opening and closing mode, the protrusion on the adjusting block is at the upper end of the opening on the surface of the locking rod. At this time, the return spring is engaged in the first groove, the tooth buckle is completely separated from the tooth groove on the surface of the shaft tooth, the position of the adjusting block remains fixed, and the locking sleeve rotates freely relative to the linkage rod, thereby realizing the unrestricted and arbitrary opening and closing of the upper lamp cover relative to the lower lamp holder. S2. Press down on the protrusion of the adjusting block to drive the adjusting block to rotate clockwise around the pivot until the upper end of the limiting groove engages with the lower end of the locking rod opening. At this time, the reset spring switches to engage inside the second groove, the toothed buckle meshes with the toothed groove on the shaft tooth surface and locks, the position of the adjusting block is fixed, and the locking sleeve and the linkage rod form a rigid lock that cannot rotate relative to each other, thereby fixing the opening angle of the upper lamp cover and the lower lamp holder. S3. In the fixed angle locking mode, rotate the upper lamp cover upwards. The locking lever rotates counterclockwise in sync with the upper lamp cover, causing the adjusting block to deflect counterclockwise in sync. The toothed buckle slides backwards and engages with the rear tooth groove of the shaft tooth. When the upper lamp cover stops rotating at the target angle, the toothed buckle automatically springs into place and locks into the corresponding shaft tooth groove under the elastic force of the return spring, thus increasing the opening and closing angle and locking it in place.

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