Pivoting mechanism and lighting lamp

Abstract

The utility model provides a pivot mechanism and lighting fixture, including first swing link component, first swing link component includes swing link base, swing link subassembly and first steering head, swing link subassembly includes first lever arm and second lever arm, the both ends of first lever arm are respectively articulated with swing link base and first steering head at first articulation point and second articulation point, two ends of the second lever arm are respectively hinged with the swing rod base and the first steering head at a third hinge point and a fourth hinge point; a compensation fine adjustment structure is arranged at the end, close to the first steering head, of the second lever arm, and the second lever arm is hinged to the first steering head at a fourth hinge point through the compensation fine adjustment structure. A connecting port is formed in the first steering head, and the distance between the third hinge point and the fourth hinge point is adjusted by adjusting the length of the compensation fine adjustment structure in the axis direction of the second lever arm, so that the first steering head rotates around the second hinge point to keep the orientation of the connecting port in the preset direction.

Description

Technical Field

[0001] The utility model relates to the technical field of lighting fixtures, and in particular to a pivot mechanism and a lighting fixture. Background Art

[0002] At present, lighting fixtures have been widely used in all walks of life. With the increase in people's demand for the use of lighting fixtures, lighting fixtures that can freely move the position of the lamp head and rotate the angle of the lamp head have been applied. In the related art, the freedom of movement of the lamp head is mainly improved by installing a pivot mechanism such as a rotating arm on the lamp head. A known solution is to design the rotating arm into two lever arms, the two ends of the first lever arm are respectively hinged to the first linkage element and the second linkage element, and the two ends of the second lever arm are respectively hinged to the first linkage element and the second linkage element. The four hinge points form a parallelogram so that the rotating arm can rotate around its adjacent components. Among them, the first linkage element and / or the second linkage element are provided with an electromechanical dedicated interface, and the electromechanical dedicated interface is used to establish an electrical connection with other adjacent components. However, due to the assembly error and process tolerance between the two lever arms and the linkage element, the electromechanical dedicated interface of at least one of the first linkage element and the second linkage element will produce a certain angle deviation after the rotating arm rotates, affecting the accuracy of the angles of other components connected to the rotating arm.

[0003] Therefore, it is necessary to provide a new technical solution to solve the above technical problems. Utility Model Content

[0004] The utility model provides a pivot mechanism and a lighting fixture, which are used to solve the problem that the rotating arm of the existing lighting fixture has an angular deviation of the electromechanical interface after it rotates a certain angle due to assembly errors and process tolerances, thereby affecting the accuracy of the angles of other components connected to the rotating arm.

[0005] The utility model provides a pivot mechanism, comprising:

[0006] A first swing rod component, the first swing rod component comprising a swing rod base, a swing rod assembly and a first steering head, the first steering head being provided with a connecting port;

[0007] The rocker assembly comprises a first lever arm and a second lever arm, one end of the first lever arm is hinged to the rocker base at a first hinge point, the other end of the first lever arm is hinged to the first steering head at a second hinge point, one end of the second lever arm is hinged to the rocker base at a third hinge point, and the other end of the second lever arm is hinged to the first steering head at a fourth hinge point via a compensation fine-tuning structure;

[0008] By adjusting the length of the compensating fine-tuning structure in the direction of the second lever arm axis, the distance between the third hinge point and the fourth hinge point can be adjusted, so that the first steering head rotates around the second hinge point to keep the orientation of the connecting port in a preset direction.

[0009] Optionally, the compensation fine-tuning structure includes a fine-tuning screw and a first connecting rod, one end of the first connecting rod is threadedly connected to the fine-tuning screw, the other end of the first connecting rod is hinged to the first steering head at a fourth hinge point, and the fine-tuning screw drives the first connecting rod to move in the axial direction of the second lever arm by rotating.

[0010] Optionally, the fine-tuning screw is arranged parallel to the axis direction of the second lever arm, and when the fine-tuning screw rotates in a first direction, the first connecting rod moves in a direction away from the rocker base, so that the length of the compensation fine-tuning structure in the axis direction of the second lever arm is extended;

[0011] When the fine-tuning screw rotates in the second direction, the first connecting rod moves toward the rocker base, so that the length of the compensation fine-tuning structure in the direction of the second lever arm axis is shortened, wherein the first direction and the second direction are opposite rotation directions.

[0012] Optionally, the compensating fine-tuning structure also includes a locking piece. A first connecting hole is provided on the first connecting rod. The locking piece is passed through the first connecting hole. The locking piece is adjusted to abut against the fine-tuning screw to achieve locking of the compensating fine-tuning structure.

[0013] Optionally, after the first rocker component is adjusted by the compensating fine-tuning structure, the lengths of at least one set of opposite sides in a quadrilateral formed by the first hinge point, the second hinge point, the third hinge point and the fourth hinge point are unequal.

[0014] Optionally, the second lever arm also includes a locking device, a sleeve and a pre-tightening assembly, one end of the sleeve is connected to the rocker arm base via the locking device, the other end of the sleeve is connected to the first steering head via the compensating fine-tuning structure, the pre-tightening assembly is arranged in the sleeve, and the locking device is used to drive the pre-tightening assembly to undergo elastic deformation along the axial direction of the sleeve, and the vertical component of the pre-tightening force generated by the pre-tightening assembly is equal to the gravity exerted on the first rocker arm component.

[0015] Optionally, the pre-tightening assembly includes a pre-tightening element and a sliding rod, one end of the pre-tightening element is fixed to the end of the sleeve close to the swing rod base, and the other end of the pre-tightening element is sleeved on the sliding rod;

[0016] The locking device comprises a locking rope, one end of which is fixed to the swing rod base, and the other end of which is passed through the first hinge point and through the pre-tightening element and fixed to the sliding rod;

[0017] During the swinging of the first swing rod component, the sliding rod is driven to slide axially along the sleeve by the change in the length of the locking rope passing through the first hinge point, so that the preload element is elastically deformed along the axial direction of the sleeve.

[0018] Optionally, a first plug and a second plug are fixedly provided on inner walls at both ends of the sleeve, respectively, one end of the preload element abuts against the first plug, and the sliding rod slides between the first plug and the second plug.

[0019] Optionally, a silencer tube is further sleeved in the sleeve, the pre-tightening element and the sliding rod are both located in the silencer tube, and the pre-tightening element and the sliding rod move within the length range of the silencer tube.

[0020] Optionally, the locking device also includes a wire wheel, the locking rope is wound around the wire wheel and fixed on the pretensioning assembly, and the locking rope is guided by the wire wheel from the side of the wire wheel away from the rocker base to be parallel to the central axis of the pretensioning assembly.

[0021] Optionally, the locking device further comprises a second connecting rod, one end of the second connecting rod is hinged to the swing rod base, the other end of the second connecting rod is fixedly connected to the sleeve, and the guide wheel is rotatably arranged on the second connecting rod;

[0022] Wherein, the locking rope is located between the guide wheel and the second connecting rod, and there is a gap between the locking rope and the second connecting rod.

[0023] Optionally, a first pivot shaft is provided at the first hinge point, the rocker base comprises a rocker base body, a sleeve fixing plate, a damping sleeve and a fastener, the sleeve fixing plate is fixed to the rocker base body by the fastener, and the sleeve fixing plate and the rocker base body are sleeved on the first pivot shaft by the damping sleeve;

[0024] Wherein, the damping sleeve includes a first sleeve and a second sleeve, the first sleeve and the second sleeve are respectively arranged on opposite sides of the rocker base body and the sleeve fixing plate, and there is a gap between the first sleeve and the second sleeve. By adjusting the fastener to change the distance between the first sleeve and the second sleeve, the damping force between the damping sleeve and the first pivot shaft is increased or decreased.

[0025] Optionally, it further includes a second rocker component, which is rotatably mounted on the connecting port.

[0026] The utility model also provides a lighting fixture, comprising the pivot mechanism and a light source component as described in any one of the above items, wherein the light source component is rotatably mounted on the pivot mechanism.

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

[0028] The utility model provides a pivot mechanism and a lighting fixture, including a rocker base, a rocker assembly and a first steering head. The pivot mechanism that can be rotated and adjusted at a certain angle is constructed by respectively hingedly connecting the two ends of the first arm of the rocker assembly to the rocker base and the first steering head at a first hinge point and a second hinge point, and respectively hingedly connecting the two ends of the second arm of the rocker assembly to the rocker base and the first steering head at a third hinge point and a fourth hinge point. The end of the second arm close to the first steering head is hinged to the first steering head through a compensating fine-tuning structure. During the use of the pivot mechanism, the distance between the third hinge point and the fourth hinge point is adjusted by adjusting the length of the compensating fine-tuning structure in the axial direction of the second arm to make the first steering head rotate around the second hinge point, so that the orientation of the connecting port on the first steering head is always maintained in a preset direction, so as to compensate for the assembly errors and process tolerances of the components, thereby ensuring the accuracy of the angles of other components connected to the first steering head. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 A three-dimensional structural diagram of a lighting fixture provided in Embodiment 1 of the utility model;

[0031] Figure 2 for Figure 1 The structural exploded diagram of the lighting fixture shown in;

[0032] Figure 3 A three-dimensional structural diagram of a lighting fixture provided in Embodiment 2 of the present utility model;

[0033] Figure 4 A three-dimensional structural diagram of a lighting fixture provided in Embodiment 3 of the present utility model;

[0034] Figure 5 A three-dimensional structural diagram of a lighting fixture provided in Embodiment 4 of the present utility model;

[0035] Figure 6 An exploded diagram of the electrical connection structure provided by an embodiment of the utility model;

[0036] Figure 7 for Figure 6 A cross-sectional schematic diagram of the electrical connection structure after assembly shown in ;

[0037] Figure 8 A schematic diagram of a first swing arm component provided by an embodiment of the utility model when in a first position;

[0038] Fig. 9 A schematic diagram of the first swing arm component provided by an embodiment of the utility model when in the second position;

[0039] Fig.10 for Figure 8 A partial structural schematic diagram of the first rocker component shown;

[0040] Fig.11 for Fig.10 A schematic diagram of the output electrical interface of the first steering head shown in FIG. 1 when it is offset to a third position;

[0041] Fig.12 for Fig.10 A schematic diagram of the output electrical interface of the first steering head shown in FIG. 1 shifted to the fourth position;

[0042] Fig.13 One of the internal structure schematic diagrams of the second lever arm provided in the embodiment of the utility model;

[0043] Fig.14 The second schematic diagram of the internal structure of the second lever arm provided in the embodiment of the utility model;

[0044] Fig.15 One of the schematic diagrams of the connection between the locking device and the swing rod base provided in the embodiment of the utility model;

[0045] Fig.16 The second schematic diagram of the connection between the locking device and the swing rod base provided in the embodiment of the utility model;

[0046] Fig.17 One of the partial structural exploded views of the first swing arm component provided in the embodiment of the utility model;

[0047] Fig.18 The second exploded view of the local structure of the first swing arm component provided in the embodiment of the utility model;

[0048] Fig.19 A partial schematic diagram of the assembled rocker base and rocker assembly provided in an embodiment of the utility model.

[0049] Reference numerals:

[0050] 1. Light source component; 2. Pivoting mechanism; 21. First swing rod component; 22. Second swing rod component; 201. Swing rod base; 202. Swing rod assembly; 203. First steering head; 204. First lever arm; 205. Second lever arm; 206. Compensation fine-tuning structure; 207. Fine-tuning screw; 208. First connecting rod; 209. First connecting hole; 210. Locking device; 211. Sleeve; 212. Preload 213, muffler; 214, preload element; 215, slide rod; 216, locking rope; 217, first plug; 218, second plug; 219, wire pulley; 220, second connecting rod; 221, wire pulley cover; 222, swing rod base body; 223, wire pressing fixing plate; 224, first pivot axis; 225, first sleeve; 226, second sleeve; 227, sleeve fixing plate; 2 28. Second steering head; 229. Fastener; 230. Damping bushing; 231. Bending slot; 3. Base assembly; 31. Base component; 32. Rotating seat component; 320. Mounting port; 4. First protection assembly; 5. Second protection assembly; 6. Output electrical interface; 7. Input electrical interface; 41. Output fixing seat; 42. Output fixing joint; 51. Input fixing seat; 52. Input fixing joint; 421. Embedding section; 422. Insertion section; 423. First supporting surface; 521. Second supporting surface; 411. First fixing hole; 511. Second fixing hole; R01. First rotation axis; R02. Second rotation axis; R03. Third rotation axis; R1. Pivot axis; A. First hinge point; D. Second hinge point; B. Third hinge point; C. Fourth hinge point; E. Connection point between locking rope and sliding rod. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0052] See also Figure 1 and Figure 2 In this embodiment, the lighting fixture is a floor lamp. The lighting fixture includes a base assembly 3, a pivot mechanism 2 and a light source component 1 (i.e., a lamp head component). One end of the pivot mechanism 2 is rotatably mounted on the base assembly 3, and the other end of the pivot mechanism 2 is rotatably mounted with the light source component 1. The shape of the light source component 1 in this embodiment is annular, but not limited thereto.

[0053] The base assembly 3 includes a base component 31 and a rotating base component 32. The rotating base component 32 is rotatably embedded in the base component 31. The rotating base component 32 is provided with a mounting opening 320. One end of the pivot mechanism 2 is mounted on the rotating base component 32 through the mounting opening 320. The base component 31 is mainly used as a counterweight to provide stable support for the entire lighting fixture. The rotating base component 32 is used to drive the pivot mechanism 2 to rotate infinitely within a range of 360° around a first rotation axis R01 shown by a dotted line. The first rotation axis R01 is substantially perpendicular to the support surface of the base assembly 3.

[0054] The pivot mechanism 2 includes a first swing arm component 21 and a second swing arm component 22, and the first swing arm component 21 includes a swing arm base 201, a swing arm assembly 202 and a first steering head 203. The first swing arm component 21 is installed on the rotating seat component 32 via the swing arm base 201, and is rotatably connected to the second swing arm component 22 via the first steering head 203. The other end of the second swing arm component 22 is provided with a second steering head 228, and the second swing arm component 22 is rotatably connected to the light source component 1 via the second steering head 228.

[0055] The swing arm assembly 202 is hinged to the swing arm base 201 via a pivot axis, and the swing arm assembly 202 pivots on the swing arm base 201 around a pivot axis R1 shown by a dotted line. The second swing arm component 22 can perform a 360° stepless rotation on the first swing arm component 21 around a second rotation axis R02 shown by a dotted line, and the light source component 1 can perform a 360° stepless rotation on the second swing arm component 22 around a third rotation axis R03 shown by a dotted line. The second rotation axis R02 and the third rotation axis R03 are both parallel to the first rotation axis R01.

[0056] There are electrical connection structures between the first swing arm component 21 and the second swing arm component 22 and between the second swing arm component 22 and the light source component 1 . The electrical connection structures can establish electrical connection between two adjacent components without laying cables between the components.

[0057] The lighting fixture of this embodiment can be adjusted and hovered at any angle and any position in the use space, and it can be achieved with just a light touch, without any rebound or sagging after adjustment.

[0058] See also Figure 3 The lighting fixture of this embodiment is a work table lamp. The lighting fixture of this embodiment has a similar structure to the lighting fixture of the above-mentioned embodiment 1, and includes a base assembly 3, a pivot mechanism 2 and a light source component 1. The specific structure and connection relationship of the base assembly 3, the pivot mechanism 2 and the light source component 1 please refer to the description in the above-mentioned embodiment, which will not be repeated here.

[0059] The rotating seat component 32 can drive the pivot mechanism 2 to rotate infinitely within a range of 360° around the first rotation axis R01 shown by the dotted line, and the first rotation axis R01 is perpendicular to the supporting surface of the base component 3. The swing arm component 202 pivots on the swing arm base 201 around the pivot axis R1 shown by the dotted line. The second swing arm component 22 can perform 360° infinite rotation around the second rotation axis R02 shown by the dotted line on the first swing arm component 21, and the light source component 1 can perform 360° infinite rotation around the third rotation axis R03 shown by the dotted line on the second swing arm component 22. The second rotation axis R02 and the third rotation axis R03 are both parallel to the first rotation axis R01.

[0060] There are electrical connection structures between the first swing arm component 21 and the second swing arm component 22 and between the second swing arm component 22 and the light source component 1 . The electrical connection structures can establish electrical connection between two adjacent components without laying cables between the components.

[0061] The lighting fixture of this embodiment can be adjusted and hovered at any angle and any position in the use space, and it can be achieved with just a light touch, without any rebound or sagging after adjustment.

[0062] See also Figure 4 The lighting fixture of this embodiment is a writing desk lamp, which can be placed on a desk. The writing desk lamp of this embodiment is similar in structure to the working desk lamp of the above embodiment, except that the pivot mechanism 2 of this embodiment includes only one swing rod component, namely the first swing rod component 21; the light source component 1 is rotatably connected to the first swing rod component 21 via the first steering head 203.

[0063] Among them, the rotating seat component 32 can drive the pivot mechanism 2 to rotate infinitely within a range of 360° around the first rotation axis R01 shown by the dotted line, and the first rotation axis R01 is perpendicular to the supporting surface of the base component 3. The rocker assembly 202 pivots on the rocker base 201 around the pivot axis R1 shown by the dotted line. The light source component 1 can perform 360° infinite rotation on the first rocker component 21 around the second rotation axis R02 shown by the dotted line. Among them, the second rotation axis R02 is parallel to the first rotation axis R01. The writing desk lamp of this embodiment has similar technical effects to the working desk lamp of the above embodiment, which will not be repeated here.

[0064] An electrical connection structure is provided between the first swing arm component 21 and the light source component 1 , and the electrical connection structure can establish an electrical connection between two adjacent components without wiring cables between the components.

[0065] See also Figure 5The lighting fixture of this embodiment is a movable wall lamp that can be installed on a wall. The movable wall lamp of this embodiment is similar in structure to the floor lamp of the first embodiment, except that the base component 31 of the base assembly 3 of this embodiment is an L-shaped structure, the side wall of the L-shaped base component 31 is used to be fixed to the wall, and the bottom of the L-shaped base component 31 is used to carry the rotating seat component 32.

[0066] The rotating seat component 32 can drive the pivot mechanism 2 to rotate infinitely within a range of 360° around the first rotation axis R01 shown by the dotted line, and the first rotation axis R01 is parallel to the mounting surface (wall) of the base component 3. The swing arm component 202 pivots on the swing arm base 201 around the pivot axis R1 shown by the dotted line. The second swing arm component 22 can perform 360° infinite rotation around the second rotation axis R02 shown by the dotted line on the first swing arm component 21, and the light source component 1 can perform 360° infinite rotation around the third rotation axis R03 shown by the dotted line on the second swing arm component 22. The second rotation axis R02 and the third rotation axis R03 are both parallel to the first rotation axis R01.

[0067] There are electrical connection structures between the first swing arm component 21 and the second swing arm component 22 and between the second swing arm component 22 and the light source component 1 . The electrical connection structures can establish electrical connection between two adjacent components without laying cables between the components.

[0068] The lighting fixture of this embodiment can be adjusted and hovered at any angle and any position in the use space, and it can be achieved with just a light touch, without any rebound or sagging after adjustment.

[0069] See also Figure 6 and Figure 7 Specifically, the electrical connection structure includes a first protection component 4 and a second protection component 5 . The first protection component 4 is provided with an output electrical interface 6 , and the second protection component 5 is provided with an input electrical interface 7 .

[0070] Combination Figure 1-Figure 7 As shown, when the light source component 1 is mounted on the first swing arm component 21 or the second swing arm component 22, the first swing arm component 21 or the second swing arm component 22 is mechanically connected to the light source component 1 through the first protection component 4 and the second protection component 5, and the first swing arm component 21 or the second swing arm component 22 is electrically connected to the light source component 1 through the output electrical interface 6 and the input electrical interface 7. When the pivot mechanism 2 includes the first swing arm component 21 and the second swing arm component 22, the first swing arm component 21 and the second swing arm component 22 are mechanically connected through the first protection component 4 and the second protection component 5, and the first swing arm component 21 and the second swing arm component 22 are electrically connected through the output electrical interface 6 and the input electrical interface 7.

[0071] Since the first protection component 4 and the second protection component 5 bear the mechanical stress between the adjacent components at both ends of the electrical connection structure, and the output electrical interface 6 and the input electrical interface 7 are not subjected to any force inside the first protection component 4 and the second protection component 5 respectively, the problem of the output electrical interface 6 and the input electrical interface 7 being easily damaged under the influence of mechanical stress for a long time can be avoided, thereby improving the stability of the electrical connection of each component and thus improving the service life of the lighting fixture.

[0072] Please continue reading Figure 6 and Figure 7 The first protection component 4 includes an output fixing seat 41 and an output fixing joint 42, the second protection component 5 includes an input fixing seat 51 and an input fixing joint 52, the output fixing seat 41 is nested in the output fixing joint 42, the input fixing seat 51 is nested in the input fixing joint 52, the output electrical interface 6 is fixed on the output fixing seat 41, and the input electrical interface 7 is fixed on the input fixing seat 51.

[0073] See also Figure 7 The input fixed joint 52 is embedded in the input end of the second rocker component and / or the light source component, and the output fixed joint 42 includes an embedded section 421 and an inserted section 422. The embedded section 421 is embedded in the output end of the first rocker component or the second rocker component, and the inserted section 422 is inserted in the corresponding input fixed joint 52.

[0074] Furthermore, the outer wall of the plug section 422 is provided with a first support surface 423 along its circumference, the first support surface 423 is arranged perpendicular to the axial direction of the output fixed joint 42, and the first support surface 423 is located at one end of the plug section 422 close to the embedded section 421. The inner wall of the input fixed joint 52 is provided with a second support surface 521 along its circumference, the second support surface 521 is arranged perpendicular to the axial direction of the input fixed joint 52, and the second support surface 521 is located at one end of the input fixed joint 52 away from the first support surface 423. The input fixed joint 52 and the output fixed joint 42 are mutually abutted through the first support surface 423 and the second support surface 521, so that the mechanical stress between the adjacent components (such as the first swing arm component and the second swing arm component) at both ends of the electrical connection structure is mainly concentrated on the first protection component 4 and the second protection component 5, thereby avoiding damage to the output electrical interface 6 and the input electrical interface 7.

[0075] In one embodiment, the input fixing joint 52 is threadedly connected to the input end of the second swing arm component and / or the light source component, and the output fixing joint 42 is threadedly connected to the output end of the first swing arm component or the second swing arm component, which is convenient for installation and disassembly.

[0076] Furthermore, the inner diameter of the embedded section 421 is larger than the inner diameter of the plug section 422, the outer diameter of the output fixed seat 41 is matched with the inner diameter of the embedded section 421, the inner wall of the output fixed joint 42 forms a step-like structure at the corresponding first support surface 423, and the end surface of the output fixed seat 41 close to the input fixed joint 52 abuts against the step-like structure. The step-like structure can limit the output fixed seat 41 in the axial direction of the electrical connection structure.

[0077] The output fixing seat 41 is provided with a first fixing hole 411 , and the output electrical interface 6 is fixed to the output fixing seat 41 through the first fixing hole 411 .

[0078] Furthermore, the outer diameter of the end of the input fixing seat 51 away from the output fixing seat 41 is larger than the outer diameter of the end close to the output fixing seat 41, the end of the input fixing seat 51 away from the output fixing seat 41 overlaps the second support surface 521, and the end of the input fixing seat 51 close to the output fixing seat 41 is inserted into the input fixing joint 52. With such a design, the input fixing seat 51 can be limited in the axial direction of the electrical connection structure.

[0079] The input fixing seat 51 is provided with a second fixing hole 511 , and the input electrical interface 7 is fixed to the input fixing seat 51 through the second fixing hole 511 .

[0080] Since the input fixing seat 51 and the output fixing seat 41 are both limited in the axial direction of the electrical connection structure, it is further ensured that the input electrical interface 7 and the output electrical interface 6 will not be subjected to mechanical stress between adjacent components after being plugged in. Moreover, the first protection component 4 and the second protection component 5 as well as the input electrical interface 7 and the output electrical interface 6 are all connected in a plug-in manner, which can realize plug-and-play of each component, is convenient to use, and can also realize circumferential rotation along the electrical connection structure, avoiding the disadvantage that ordinary plug terminals cannot be rotated arbitrarily when used.

[0081] See also Figure 8 and Fig. 9 The first swing arm component 21 includes a swing arm base 201, a swing arm assembly 202 and a first steering head 203. The swing arm assembly 202 includes a first lever arm 204 and a second lever arm 205. One end of the first lever arm 204 is hinged to the swing arm base 201 at a first hinge point A, the other end of the first lever arm 204 is hinged to the first steering head 203 at a second hinge point D, one end of the second lever arm 205 is hinged to the swing arm base 201 at a third hinge point B, and the other end of the second lever arm 205 is hinged to the first steering head 203 at a fourth hinge point C. The first lever arm 204 has a cavity, and the second lever arm 205 can be disposed in the cavity of the first lever arm 204, so that the first swing arm component 21 has a strong integrity and saves space.

[0082] The first hinge point A, the second hinge point D, the third hinge point B and the fourth hinge point C form a quadrilateral ABCD (as shown by the imaginary connecting lines between the hinge points in the figure), wherein the lengths of the connecting line between the first hinge point A and the third hinge point B (i.e., the AB side (imaginary) of the quadrilateral), the connecting line between the first hinge point A and the second hinge point D (i.e., the AD side (imaginary) of the quadrilateral), and the connecting line between the second hinge point D and the fourth hinge point C (i.e., the DC side (imaginary) of the quadrilateral) are all kept constant.

[0083] Due to the inevitable assembly errors and process tolerances between the first lever arm 204, the second lever arm 205, the swing arm base 201 and the first steering head 203, the first swing arm component 21 is in the first position (such as Figure 8 ) and the second position (as shown Fig. 9 When the first steering head 203 swings between the two directions (as shown in the figure), the direction of the connecting port (i.e., the output electrical interface 6) on the first steering head 203 deviates from the preset direction (such as the vertical direction), and the deviation angle will directly affect the angles of other components connected above the first rocker component 21.

[0084] Based on this, in the embodiment of the utility model, by setting a compensation fine-tuning structure 206 at one end of the second lever arm 205 close to the first steering head 203, the second lever arm 205 is hinged to the first steering head 203 at the fourth hinge point C through the compensation fine-tuning structure 206. The first steering head 203 is provided with an output electrical interface 6, and the distance between the third hinge point B and the fourth hinge point C is adjusted by adjusting the length of the compensation fine-tuning structure 206 in the axial direction of the second lever arm 205, so that the first steering head 203 rotates a certain angle around the second hinge point D so as to always keep the direction of the output electrical interface 6 in a preset direction (such as a vertical direction).

[0085] See also Fig.10 The compensation fine-tuning structure 206 includes a fine-tuning screw 207 and a first connecting rod 208. One end of the first connecting rod 208 is threadedly connected to the fine-tuning screw 207, and the other end of the first connecting rod 208 is hinged to the first steering head 203 at the fourth hinge point C. The fine-tuning screw 207 drives the first connecting rod 208 to move in the axial direction of the second lever arm 205 by rotating.

[0086] Specifically, the fine-tuning screw 207 is arranged parallel to the axis direction of the second lever arm. When the fine-tuning screw 207 rotates in the first direction, the first connecting rod 208 moves away from the swing arm base 201, so that the length of the compensation fine-tuning structure 206 in the axis direction of the second lever arm is extended, that is, the length of the connecting line between the third hinge point B and the fourth hinge point C (that is, the BC side of the quadrilateral (imaginary)) is extended. During the swinging process of the first swing arm component, if the output electrical interface 6 is offset to the third position, such as Fig.11As shown, at this time, the fine-tuning screw 207 is rotated in a first direction (such as counterclockwise), so that the length of the compensation fine-tuning structure 206 in the direction of the second arm axis is extended, and under the push of the first connecting rod 208 and the hinge action of the second hinge point D, the first steering head 203 is rotated counterclockwise around the second hinge point D by a specified angle a, so that the direction of the output electrical interface 6 of the first steering head 203 is always maintained in a preset direction (such as a vertical direction).

[0087] When the fine-tuning screw 207 rotates in the second direction, the first connecting rod 208 moves toward the direction close to the swing arm base 201, so that the length of the compensation fine-tuning structure 206 in the direction of the second arm axis is shortened, that is, the length of the connecting line between the third hinge point B and the fourth hinge point C (that is, the BC side of the quadrilateral (imaginary)) is shortened. The first direction and the second direction are opposite rotation directions. During the swinging process of the first swing arm component, if the output electrical interface 6 is offset to the fourth position, such as Fig.12 As shown, at this time, the fine-tuning screw 207 is rotated in the second direction (such as clockwise), so that the length of the compensation fine-tuning structure 206 in the direction of the second arm axis is shortened, and under the pulling of the first connecting rod 208 and the hinge action of the second hinge point D, the first steering head 203 is rotated around the second hinge point D in the clockwise direction by a specified angle a, so that the direction of the output electrical interface 6 of the first steering head 203 is always maintained in a preset direction (such as vertical direction).

[0088] After the first swing arm component 21 is adjusted by the compensation fine-tuning structure 206, the lengths of at least one set of opposite sides in the quadrilateral formed by the first hinge point A, the second hinge point D, the third hinge point B and the fourth hinge point C are not equal. For example, the length of the BC side (imaginary) of the quadrilateral is adjusted by the compensation fine-tuning structure 206 so that the length of the BC side (imaginary) of the quadrilateral is greater than or less than the length of the AD side (imaginary) of the quadrilateral, that is, the quadrilateral is adjusted to a trapezoidal structure.

[0089] Please continue reading Fig.10 In one embodiment, the compensation fine-tuning structure 206 further includes a locking member, and a first connecting hole 209 is provided on the first connecting rod 208, and the locking member is passed through the first connecting hole 209. After the compensation fine-tuning structure 206 is adjusted, the locking member is adjusted to abut against the fine-tuning screw 207 to achieve locking of the compensation fine-tuning structure 206.

[0090] See also Fig.13The second arm 205 also includes a locking device 210, a sleeve 211 and a pre-tightening assembly 212. One end of the sleeve 211 is connected to the rocker base 201 through the locking device 210, and the other end of the sleeve 211 is connected to the first steering head 203 through the compensating fine-tuning structure 206. The pre-tightening assembly 212 is arranged in the sleeve 211, and the locking device 210 is used to drive the pre-tightening assembly 212 to undergo elastic deformation along the axial direction of the sleeve 211. The pre-tightening force generated by the pre-tightening assembly 212 has a vertical component force equal to the gravity exerted on the first rocker component.

[0091] The pre-tightening assembly 212 includes a pre-tightening element 214 and a sliding rod 215. One end of the pre-tightening element 214 is fixed to the end of the sleeve 211 near the swing arm base 201, and the other end of the pre-tightening element 214 is sleeved on the sliding rod 215. The locking device 210 includes a locking rope 216. One end of the locking rope 216 is fixed to the swing arm base 201, and the other end of the locking rope 216 is fixed to the sliding rod 215 by passing through the first hinge point A and the pre-tightening element 214. During the swinging process of the first swing arm component 21, the sliding rod 215 is driven to slide axially along the sleeve 211 by the change in the length of the locking rope 216 passing through the first hinge point A, so that the pre-tightening element 214 is elastically deformed along the axial direction of the sleeve 211.

[0092] In one embodiment, the preload element 214 is a spring, and the spring is in a compressed state during the swinging of the swing arm assembly.

[0093] The preload element 214 has a preset preload force, which can at least resist the weight of the first swing arm component. Preferably, the preset preload force can resist the total weight of the first swing arm component and other components thereon (such as the second swing arm component and the light source component).

[0094] The locking rope 216 is fixed on the swing arm base 201 via the first hinge point A. The first hinge point A, the third hinge point B and the connection point E of the locking rope 216 and the sliding rod 215 form a vector triangle (ABE). The pre-tightening element 214 has a preset pre-tightening force. After being fixed on the swing arm base 201, the locking rope 216 can form a reaction force relative to the pre-tightening force of the pre-tightening element 214. When the first swing arm component is swinging, the sliding rod 215 and the pre-tightening element 214 are driven to slide by changing the length of the pivot axis of the locking rope 216 via the first hinge point A, thereby dynamically adjusting the pre-tightening force of the pre-tightening element 214. For example, the initial pre-tightening force of the pre-tightening element 214 is set to: when the first swing arm component is placed vertically (i.e., nearly parallel to the central axis of the swing arm base), the total weight of the first swing arm component and other components located thereon. When the first swing arm component is placed vertically, the locking rope 216 and the pivot axis at the first hinge point A are similar to a tangent state. At this time, the length of the locking rope 216 around the pivot axis at the first hinge point A is the shortest, and the AE side of the vector triangle is the longest. The initial vertical upward preload force of the preload element 214 and the total weight of the first swing arm component and other components located thereon offset each other, and the entire lamp is close to zero gravity. When the first swing arm component is tilted at a certain angle, the length of the locking rope 216 around the first hinge point A becomes longer, and the locking rope 216 pulls the sliding rod 215 to slide to compress the preload element 214, and the AE side of the vector triangle becomes shorter, thereby dynamically adjusting the preload force of the preload element 214 so that the vertical component of the preload force is equal to the total weight of the first swing arm component and other components located thereon.

[0095] This embodiment constructs a vector triangle (ABE) which, based on the equilibrium equation of the plane force system (the vector triangle solves the dynamic balance problem), generates a partial upward component of force and a mutual balance between the overall product mass gravity, thereby achieving adjustment and hovering of the lamp at any position in the use space without any rebound or sagging after adjustment.

[0096] Furthermore, a first plug 217 and a second plug 218 are fixedly provided on the inner walls of both ends of the sleeve 211 , respectively. One end of the preload element 214 abuts against the first plug 217 , and the sliding rod 215 slides between the first plug 217 and the second plug 218 .

[0097] Furthermore, a silencer tube 213 is sleeved in the sleeve 211, and the pre-tightening element 214 and the sliding rod 215 are both located in the silencer tube 213, and the pre-tightening element 214 and the sliding rod 215 move within the length of the silencer tube 213, thereby preventing the pre-tightening component 212 from generating noise during the sliding process.

[0098] See also Fig.14The locking device 210 includes a locking rope 216, a guide wheel 219 and a second connecting rod 220. One end of the second connecting rod 220 is hinged to the swing rod base, the other end of the second connecting rod 220 is fixedly connected to the sleeve 211, and the guide wheel 219 is rotatably arranged on the second connecting rod 220. One end of the locking rope 216 is fixed to the swing rod base 201, and the other end of the locking rope 216 is wound around the guide wheel 219 and passed through the pre-tightening assembly 212 and fixed to the end of the pre-tightening assembly 212 away from the swing rod base 201.

[0099] Under the guidance of the wire wheel 219, the portion of the locking rope 216 on the side of the wire wheel 219 away from the swing arm base 201 is always parallel to the central axis of the pre-tightening assembly 212. During the rotation of the swing arm base 202 around the swing arm base 201, there is rolling friction between the locking rope 216 and the wire wheel 219, and the portion of the locking rope 216 located in the sleeve 211 is always parallel to the central axis of the pre-tightening assembly 212, so that the locking rope 216 and the internal structure of the sleeve 211 can be prevented from sliding friction, thereby protecting the locking rope 216 from damage. Since there is no sliding friction between the locking rope 216 and the internal structure of the sleeve 211, it will not affect the pre-tightening force of the pre-tightening assembly 212, thereby improving the stability of the lighting fixture.

[0100] Specifically, the locking rope 216 is located between the wire wheel 219 and the second connecting rod 220, and there is a gap between the locking rope 216 and the second connecting rod 220 to avoid sliding friction between the locking rope 216 and the second connecting rod 220. The locking rope 216 passes around the wire wheel 219 and passes through the pre-tightening element 214 to be fixed on the sliding rod 215.

[0101] Furthermore, the locking device 210 further includes a wire wheel pressure cover 221 , and both ends of the rotating shaft of the wire wheel 219 are rotatably mounted on the second connecting rod 220 through two wire wheel pressure covers 221 .

[0102] Furthermore, the portion of the locking rope 216 disposed on the rocker base 201 is bent multiple times to form a curve, so that the locking rope 216 increases static friction multiple times, thereby improving the stability of the locking device.

[0103] Specifically, see Fig.15 and Fig.16 The swing rod base 201 includes a swing rod base body 222 and a wire pressing fixing plate 223. The swing rod base body 222 is provided with a curved slot 231. The locking rope 216 is passed through the curved slot 231, so that the locking rope 216 forms a corresponding curved segment. Fig.15 As shown, the locking rope 216 is wound through the bending slot 231 and forms the first and second bending changes at the point F. Fig.16As shown, the locking rope 216 forms the third and fourth bending changes at the G point after winding through the bending slot 231. And the end of the locking rope 216 is pressed between the wire pressing fixing plate 223 and the swing rod base body 222 through a fastener.

[0104] The locking rope 216 cleverly increases static friction multiple times through the curved design, and the locking rope 216 is very stable due to the function of the wire pressing fixing plate 223, so it is not easy to loosen. In this way, while compressing the preload element, the reaction force calculation is more accurate, so the mass gravity and reaction force calculation of the overall product are more accurate, and the product experience performance is more superior.

[0105] See also Figure 17-Figure 19 , the first pivot shaft 224 at the first hinge point A is built into the cavity of the rocker assembly 202 (first lever arm 204), the rocker base 201 further includes a sleeve fixing plate 227, a damping sleeve 230 and a fastener 229, the sleeve fixing plate 227 is fixed to the rocker base body 222 through the fastener 229, and the sleeve fixing plate 227 and the rocker base body 222 are sleeved on the first pivot shaft 224 through the damping sleeve 230. The damping sleeve 230 includes a first sleeve 225 and a second sleeve 226, which are respectively arranged on opposite sides of the rocker base body 222 and the sleeve fixing plate 227. The first sleeve 225 and the second sleeve 226 are both adapted to the first pivot shaft 224, and the first sleeve 225 and the second sleeve 226 are combined to form a cavity structure for accommodating the first pivot shaft 224.

[0106] The rocker arm base body 222 is installed on one side of the first pivot shaft 224 via the first bushing 225, and the bushing fixing plate 227 is installed on the other side of the first pivot shaft 224 via the second bushing 226, and the bushing fixing plate 227 is fixed to the rocker arm base body 222 by the fastener 229, thereby realizing a two-in-one fixing method of the rocker arm base 201 and the rocker arm assembly 202, making the structure more compact and rigorous, and the space for multiple structures to be used together is smaller.

[0107] Furthermore, there is a gap (for example, 0.6 mm) between the first sleeve 225 and the second sleeve 226. By adjusting the fastener 229, the distance between the first sleeve 225 and the second sleeve 226 can be changed, so that the damping force between the damping sleeve 230 and the first pivot shaft 224 is increased or decreased. In this embodiment, the damping force between the damping sleeve 230 and the first pivot shaft 224 is adjusted by adjusting the damping, so as to prevent the swing arm assembly from rebounding or sagging after adjustment, so that the overall lamp can better achieve the balance adjustment of gravity and reaction force.

[0108] The lighting fixture provided by the utility model integrates a variety of geometric mechanics principles, comprehensively designs the natural gravity of the product and the friction generated during the connection of the mechanism, and constructs a vector triangle to solve the dynamic balance problem. The lamp can be adjusted and hovered at any position in the use space, and can be rotated and adjusted at any angle (more than 360°) with just a light touch, without any rebound or sagging after adjustment.

[0109] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A pivot mechanism, characterized in that: include: A first swing arm component (21), the first swing arm component (21) comprising a swing arm base (201), a swing arm assembly (202) and a first steering head (203), the first steering head (203) being provided with a connection port; The rocker assembly (202) comprises a first lever arm (204) and a second lever arm (205), one end of the first lever arm (204) is hinged to the rocker base (201) at a first hinge point (A), the other end of the first lever arm (204) is hinged to the first steering head (203) at a second hinge point (D), one end of the second lever arm (205) is hinged to the rocker base (201) at a third hinge point (B), and the other end of the second lever arm (205) is hinged to the first steering head (203) at a fourth hinge point (C) via a compensation fine-tuning structure (206); By adjusting the length of the compensating fine-tuning structure (206) in the axial direction of the second lever arm (205), the distance between the third hinge point (B) and the fourth hinge point (C) can be adjusted, so that the first steering head (203) rotates around the second hinge point (D) to keep the orientation of the connection port in a preset direction.

2. The pivot mechanism according to claim 1, characterized in that: The compensation fine-tuning structure (206) comprises a fine-tuning screw (207) and a first connecting rod (208), one end of the first connecting rod (208) being threadedly connected to the fine-tuning screw (207), and the other end of the first connecting rod (208) being hinged to the first steering head (203) at a fourth hinge point (C), and the fine-tuning screw (207) drives the first connecting rod (208) to move in the axial direction of the second lever arm (205) by rotating.

3. The pivot mechanism according to claim 2, characterized in that: The fine-tuning screw (207) is arranged parallel to the axial direction of the second lever arm (205); when the fine-tuning screw (207) rotates in a first direction, the first connecting rod (208) moves in a direction away from the rocker base (201), so that the length of the compensation fine-tuning structure (206) in the axial direction of the second lever arm (205) is extended; When the fine-tuning screw (207) rotates in the second direction, the first connecting rod (208) moves in a direction close to the rocker base (201), so that the length of the compensating fine-tuning structure (206) in the axial direction of the second lever arm (205) is shortened, wherein the first direction and the second direction are opposite rotation directions.

4. The pivot mechanism according to claim 3, characterized in that: The compensating fine-tuning structure (206) also includes a locking piece. A first connecting hole (209) is provided on the first connecting rod (208). The locking piece is inserted into the first connecting hole (209). The compensating fine-tuning structure (206) is locked by adjusting the locking piece to abut against the fine-tuning screw (207).

5. The pivot mechanism according to any one of claims 1 to 4, characterized in that: After the first rocker component (21) is adjusted by the compensating fine-tuning structure (206), the lengths of at least one set of opposite sides in a quadrilateral formed between the first hinge point (A), the second hinge point (D), the third hinge point (B) and the fourth hinge point (C) are unequal.

6. The pivot mechanism according to any one of claims 1 to 4, characterized in that: The second lever arm (205) further comprises a locking device (210), a sleeve (211) and a pre-tightening assembly (212); one end of the sleeve (211) is connected to the rocker base (201) via the locking device (210); the other end of the sleeve (211) is connected to the first steering head (203) via the compensating fine-tuning structure (206); the pre-tightening assembly (212) is arranged in the sleeve (211), and the locking device (210) is used to drive the pre-tightening assembly (212) to undergo elastic deformation along the axial direction of the sleeve (211); the pre-tightening force generated by the pre-tightening assembly (212) has a vertical component force equal to the gravity exerted on the first rocker component (21).

7. The pivot mechanism according to claim 6, characterized in that: The pre-tightening assembly (212) comprises a pre-tightening element (214) and a sliding rod (215), one end of the pre-tightening element (214) is fixed to the end of the sleeve (211) close to the swing arm base (201), and the other end of the pre-tightening element (214) is sleeved on the sliding rod (215); The locking device (210) comprises a locking rope (216), one end of which is fixed to the swing rod base (201), and the other end of which is passed through the first hinge point (A) and through the pre-tightening element (214) to be fixed to the sliding rod (215); During the swinging of the first swing rod component (21), the change in length of the locking rope (216) passing through the first hinge point (A) drives the sliding rod (215) to slide axially along the sleeve (211), thereby causing the preload element (214) to undergo elastic deformation axially along the sleeve (211).

8. The pivot mechanism according to claim 7, characterized in that: A first plug (217) and a second plug (218) are respectively provided on the inner walls at both ends of the sleeve (211), one end of the preload element (214) abuts against the first plug (217), and the sliding rod (215) slides between the first plug (217) and the second plug (218).

9. The pivot mechanism according to claim 7, characterized in that: A silencer tube (213) is also sleeved in the sleeve (211), the pre-tightening element (214) and the sliding rod (215) are both located in the silencer tube (213), and the pre-tightening element (214) and the sliding rod (215) move within the length range of the silencer tube (213).

10. The pivot mechanism according to claim 7, characterized in that: The locking device (210) further comprises a wire wheel (219), the locking rope (216) is wound around the wire wheel (219) and fixed on the pre-tensioning assembly (212), and the locking rope (216) is parallel to the central axis of the pre-tensioning assembly (212) from the side of the wire wheel (219) away from the rocker base (201) through the guidance of the wire wheel (219).

11. The pivot mechanism according to claim 10, characterized in that: The locking device (210) further comprises a second connecting rod (220), one end of the second connecting rod (220) being hinged to the swing rod base (201), the other end of the second connecting rod (220) being fixedly connected to the sleeve (211), and the guide wheel (219) being rotatably arranged on the second connecting rod (220); Wherein, the locking rope (216) is located between the guide wheel (219) and the second connecting rod (220), and there is a gap between the locking rope (216) and the second connecting rod (220).

12. The pivot mechanism according to claim 11, characterized in that: A first pivot shaft (224) is provided at the first hinge point (A); the rocker base (201) comprises a rocker base body (222), a sleeve fixing plate (227), a damping sleeve (230) and a fastener (229); the sleeve fixing plate (227) is fixed to the rocker base body (222) via the fastener (229); and the sleeve fixing plate (227) and the rocker base body (222) are sleeved on the first pivot shaft (224) via the damping sleeve (230); The damping sleeve (230) comprises a first sleeve (225) and a second sleeve (226), wherein the first sleeve (225) and the second sleeve (226) are respectively arranged on opposite sides of the rocker base body (222) and the sleeve fixing plate (227), and there is a gap between the first sleeve (225) and the second sleeve (226). By adjusting the fastener (229) to change the distance between the first sleeve (225) and the second sleeve (226), the damping force between the damping sleeve (230) and the first pivot shaft (224) is increased or decreased.

13. The pivot mechanism according to claim 1, characterized in that: It also comprises a second swing rod component (22), wherein the second swing rod component (22) is rotatably mounted on the connecting port.

14. A lighting fixture, characterized in that: It comprises a pivot mechanism (2) and a light source component (1) as claimed in any one of claims 1 to 13, wherein the light source component (1) is rotatably mounted on the pivot mechanism (2).

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