An electronically controlled zoom spotlight

Abstract

This application relates to the field of spotlights, specifically to an electronically controlled zoom spotlight. This spotlight solves the technical problems of existing zoom spotlights, which generally rely on mechanical structures (such as screw rotation or mechanical extension) to drive lens movement, resulting in complex structure, large size, low adjustment efficiency, severe mechanical wear, and difficulty in integrating intelligent control.

Description

Technical Field

[0001] This application relates to the field of spotlights, specifically to an electronically controlled zoom spotlight. Background Technology

[0002] With the rapid development of LED lighting technology, commercial lighting (such as museums, art galleries, and clothing stores) and high-end hotel lighting have increasingly higher requirements for the functionality of lighting fixtures. Among them, "zoomable spotlights" are gradually becoming the mainstream products in the market because they can flexibly adjust the beam angle according to the size of the illuminated object.

[0003] Currently, the most common zoom spotlight structures on the market mainly rely on mechanical structures to drive the lens movement, and mainly include the following two forms: Threaded Rotary Zoom Structure: Chinese patent CN212510800U discloses a typical rotary focusing structure. This structure uses a rotating focusing ring at the front of the lamp head to drive the internal lens assembly to move back and forth along the optical axis via a threaded transmission mechanism, thereby changing the distance between the lens and the light source to achieve zoom.

[0004] Disadvantages: While this structure allows for continuous adjustment of the beam angle, it is complex, involving multiple sets of threaded connections and requiring high precision in the mold. Over long-term use, wear can easily occur at the threads, leading to loss of damping (deteriorated feel) or jamming. Furthermore, the rotational operation requires pre-existing mechanical clearance, making it difficult for the lamp to meet high-level waterproof and dustproof standards.

[0005] Mechanical telescopic / push-pull zoom structure: Chinese patents CN203641973U and CN205480579U disclose a solution for achieving zoom by directly pushing and pulling the lamp head or lens bracket.

[0006] Disadvantages: While this structure is relatively simple, its adjustment precision is poor, making fine-tuning difficult. Secondly, since it relies mainly on friction to fix the position, it is prone to loosening after prolonged use, leading to unexpected deviations in the illumination angle (i.e., "focus drift"). Furthermore, spotlights are typically installed at high locations such as ceilings, and both of the aforementioned mechanical adjustment methods require manual operation by staff using ladders, resulting in extremely high maintenance costs and failing to meet the dynamic demands of modern smart scenarios for "one-click switching of scene lighting effects."

[0007] In summary, existing mechanical zoom spotlights generally suffer from complex structures, large sizes, low adjustment efficiency, and difficulty in achieving intelligent control. Therefore, it is particularly important to design a purely electrically controlled angle-adjustable spotlight that is compact, has a fast response speed, and is easy to integrate into an intelligent control system. Utility Model Content

[0008] The purpose of this application is to provide an electronically controlled zoom spotlight, which aims to solve the technical problems of existing zoom spotlights that generally rely on mechanical structures (such as screw rotation or mechanical extension) to drive lens movement, resulting in complex structure, large size, low adjustment efficiency, severe mechanical wear, and difficulty in integrating intelligent control.

[0009] To address the above problems, this application provides the following technical solution: An electronically controlled zoom spotlight mainly includes a heat sink, a rear cover, a PCBA (power control assembly), a lamp board, a lens, and an outer ring. The heat sink has a front end and a back end, serving as the main support frame and heat conduction component of the spotlight. The rear cover is disposed on the back of the heat sink, forming a closed or semi-closed cavity. The PCBA is disposed within the cavity and fixed to the heat sink or the rear cover, providing drive current and control signals.

[0010] The lamp board is fixedly connected to the front end of the heat sink, with its back side in close contact with the heat sink to achieve heat conduction. The lamp board is equipped with several light-emitting units (such as LED beads). These light-emitting units are not connected in series to form a single circuit in electrical connection. Instead, they are divided into at least two independent light-emitting groups, and each light-emitting group is electrically connected to the PCBA through an independent circuit, thereby receiving independent current control.

[0011] The lens covers the light path of the lamp panel and is pressed and fixed by an outer ring located at the front end of the heat sink. The lens adopts a zoned optical design, with different optical distribution angles corresponding to different light-emitting groups. The PCBA is configured to change the combination of light rays refracted by the lens by adjusting the current ratio of different light-emitting groups (e.g., changing the duty cycle or current amplitude), thereby changing the overall light emission angle of the spotlight.

[0012] Furthermore, the light-emitting units on the light panel are spatially arranged as a first light-emitting group located in the central area and a second light-emitting group located in the peripheral area. Correspondingly, the lens adopts a one-piece injection-molded combined lens structure, which includes a focusing unit corresponding to the first light-emitting group and a floodlight unit corresponding to the second light-emitting group.

[0013] Furthermore, the focusing unit is preferably designed as a total internal reflection (TIR) ​​collimating lens structure, which has a small light emission angle and is used to generate a strong central beam. Furthermore, the floodlight unit is preferably designed as a freeform or beaded lens structure, with a large light emission angle, used to generate wide-range basic lighting. This differentiated arrangement between the center and periphery achieves the pre-defined separation of the physical optical path.

[0014] The PCBA integrates an intelligent control algorithm that supports not only simple switching between two light-emitting groups (i.e., illuminating only the spotlight or only the floodlight), but also simultaneous illumination of both groups, dynamically and continuously adjusting their brightness mixing ratio. For example, when switching from spotlight mode to floodlight mode, the controller gradually reduces the current of the first light-emitting group while proportionally increasing the current of the second group. During this process, the beam angle can be smoothly and steplessly adjusted between the set minimum and maximum angles, while the total power remains constant, avoiding visually sudden brightness changes.

[0015] To facilitate parameter presets (such as color temperature or power selection) without disassembling the lamp body, an adjustment window is provided on the top surface of the rear cover, and a DIP switch cover is provided at this window. A DIP switch is located at the same position as the window on the PCBA. The DIP switch cover has a detachable or flip-up structure, covering the DIP switch, which not only provides protection against dust and accidental activation, but also retains the convenience of manual adjustment.

[0016] Mounting brackets are provided on both sides of the outer wall of the back cover. Strong springs (such as torsion springs) are connected to the mounting brackets to securely insert the spotlight into the mounting holes in the ceiling, achieving an embedded, concealed installation. The heat sink is preferably made of die-cast aluminum alloy, with several heat dissipation fins on its surface to increase the heat exchange area and ensure long-term stable operation of the light-emitting unit under high power density.

[0017] Beneficial effects Compared with the prior art, the electronically controlled zoom spotlight provided in this application has the following significant advantages: With no mechanical movement, it has extremely high reliability: This application completely eliminates precision mechanical components such as gears, slide rails, and threaded drives, completely eliminating the risk of jamming, damping failure, and scorching caused by mechanical wear after long-term use, greatly extending the service life of the product, and is especially suitable for high-altitude and difficult-to-maintain locations.

[0018] Simplified structure and low manufacturing cost: The static stacked structure of "fixed lens + grouped light source" significantly simplifies mold design, reduces the number of parts and assembly difficulty, thereby effectively reducing production costs.

[0019] Rapid response and high level of intelligence: The electronically controlled zoom has a response speed of milliseconds, far faster than motor-driven or manual adjustment. This makes the spotlight easily integrated into smart home or commercial lighting control systems, enabling instantaneous switching and dynamic stepless adjustment of scene lighting effects.

[0020] Compact size, conducive to ultra-thin design: Since there is no need to reserve axial travel space for the forward and backward movement of the lens, the height of the lamp can be designed to be thinner and more compact, meeting the ultimate requirements of modern architecture for the concealment and aesthetics of lamps. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is an exploded structural diagram of a specific embodiment of the electrically controlled zoom spotlight of this application; Figure 2 This is an assembly diagram of a specific embodiment of the electronically controlled zoom spotlight of this application; 1. DIP switch cover; 2. Spring; 3. Back cover; 4. PCBA; 5. Heat sink; 6. Lamp board; 7. Lens; 8. Outer ring. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] The following will refer to the embodiments of this application. Figure 1 and Figure 2 The technical solution of this application is described clearly and completely.

[0025] like Figure 1 As shown in the embodiment of this application, an electrically adjustable spotlight has an overall mechanical structure mainly composed of an external housing assembly, a heat dissipation assembly, and a mounting assembly.

[0026] The heat sink 5, serving as the main frame, is located in the middle and is responsible for supporting the core optoelectronic components and conducting heat. The back cover 3 is fastened to the top of the heat sink 5, and the two together form a housing cavity.

[0027] In other embodiments, the heat sink 5 and the back cover 3 can also be designed as an integral structure (e.g., manufactured as a whole by die casting) to further enhance structural strength and simplify assembly.

[0028] In terms of materials, in addition to aluminum alloy, heat sink 5 can also be made of thermally conductive plastic (with or without aluminum), ceramic or graphene composite materials, as long as it can meet the heat dissipation requirements of optoelectronic components.

[0029] The drive control assembly PCBA4 is housed within the cavity. An adjustment window is provided on the top surface of the rear cover 3, which is covered by a DIP switch cover 1, so that the user can toggle the internal switch without disassembling the lamp.

[0030] This application is not limited to built-in designs. In ultra-thin applications, PCBA4 can be designed as an external power supply box, connected to the lamp body via wires; or DOB (Driverboard) technology can be used to directly integrate the drive circuit onto the lamp board 6, thereby completely eliminating the need for a separate PCBA board and housing cavity, achieving an ultra-thin design.

[0031] In addition to physical DIP switches, wireless control modules (such as Zigbee, Bluetooth, Wi-Fi) can also be used. In this case, there is no need to open an adjustment window and DIP cover 1 on the back cover 3, achieving a fully enclosed design.

[0032] Springs 2 are installed on both sides of the back cover 3 to hold the spotlight into the ceiling mounting hole.

[0033] The mounting components are not limited to torsion spring structures, but may also employ spring clips, slider clips, or threaded tightening structures.

[0034] If applied to a magnetic track lighting system, the mounting components can be replaced with a magnetic adapter and a rail clip.

[0035] The outer ring 8 is located at the bottom of the lamp, defining the light outlet and serving a decorative purpose. The lamp panel 6 is mounted on the bottom surface (light-emitting side) of the heat sink 5, and the lens 7 covers the bottom of the lamp panel 6 and is pressed and fixed by the outer ring 8. The entire mechanical structure is compact, with each component stacked and assembled along the optical axis to form an integrated recessed spotlight.

[0036] The core innovation of this application in achieving "electrically controlled angle adjustment" lies in the grouping and coordination design of optoelectronic components and the current distribution logic of drive control.

[0037] The LED light-emitting units on the light panel 6 are divided into at least two independent control channels in terms of electrical connection.

[0038] The specific layout is usually designed as a concentric circle layout, that is, a "spotlight LED group" in the center and a "floodlight LED group" on the periphery; or it can be designed as a cross matrix layout.

[0039] Lens 7 is an integrated composite lens, with different optical surface shapes on its surface for different LED chips. The lens area corresponding to the "focus LED chip group" is designed as a small-angle (e.g., 15°) total internal reflection (TIR) ​​collimating surface for projecting strong central light; the lens area corresponding to the "floodlight LED chip group" is designed as a large-angle (e.g., 60°) freeform surface or bead surface for providing soft basic lighting.

[0040] The light source is not limited to SMD surface-mount LEDs; a dual-color / dual-channel COB (ChiponBoard) light source can also be used. For example, a custom COB can be used, which internally encapsulates two independently controlled chips, an inner ring and an outer ring. The inner ring corresponds to focusing, and the outer ring corresponds to floodlighting, achieving the same effect as described in this application.

[0041] The lens 7 is not limited to an integral lens. It can also adopt a hybrid optical structure of "reflector + lens" or a multi-layer lens group structure. As long as it can be used with grouped light sources to achieve different beam angles, it falls within the protection scope of this application.

[0042] The drive control logic PCBA4 integrates dual or multiple constant current drive circuits and microcontroller units (MCUs).

[0043] The control principle is as follows: PCBA4 dynamically adjusts the current ratio flowing to the "spotlight LED group" and the "floodlight LED group" based on the received control signal (from DIP switch, wall switch or wireless command) through PWM (pulse width modulation) or CCR (analog current regulation) technology.

[0044] Angle adjustment modes include: Concentrated mode: The drive circuit supplies power only to the concentrator, resulting in the smallest beam angle.

[0045] Floodlight mode: The drive circuit supplies power only to the floodlight group, resulting in the maximum beam angle.

[0046] Stepless angle adjustment: The drive circuit supplies power to two groups simultaneously and continuously changes the current distribution ratio between the two groups (e.g., from 100:0 to 0:100), thereby achieving a smooth transition of the beam angle between the minimum and maximum, while maintaining a constant total power during the transition and avoiding brightness fluctuations.

[0047] Extended Solution (Multi-dimensional Adjustment): Drive control is not limited to angle adjustment; it can also be combined with color temperature adjustment. For example, four-way control can be set up (warm light focus, cool light focus, warm light flood, and cool light flood), thereby achieving three-dimensional light effect adjustment of "angle + color temperature + brightness".

[0048] Existing technologies typically alter the light path by rotating the lamp head or moving the lens, resulting in complex lamp structures, large sizes, and slow adjustment speeds. This application, however, completely eliminates mechanical moving parts through a "fixed lens + grouped light sources + current ratio control" technique. First, it solves the problems of complex structure and high cost: eliminating gears, guide rails, and other precision mechanical parts greatly simplifies the production and assembly process and reduces material costs. Second, it solves the problems of slow adjustment speed and wear: the electronic control adjustment response is in the millisecond range, and there is no mechanical wear, significantly improving the system's reliability and lifespan. Third, it facilitates miniaturization: since there is no need to reserve space for mechanical movement, the lamp height can be made lower, meeting the modern lighting demands for thinness and integration.

[0049] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An electronically controlled zoom spotlight, characterized in that, include: Heat sink (5) having a front end and a back end; The rear cover (3) covers the back of the heat sink (5) and forms a receiving cavity with the heat sink (5); PCBA (4), which is disposed in the cavity and fixed to the heat sink (5) or the back cover (3); The lamp board (6) is fixedly disposed at the front end of the heat sink (5). The lamp board (6) is provided with a plurality of light-emitting units. The light-emitting units are electrically divided into at least two independent light-emitting groups and are electrically connected to the PCBA (4) respectively. Lens (7) covers the light path of the lamp panel (6); An outer ring (8) is disposed at the front end of the heat sink (5) and presses and fixes the lens (7).

2. The electronically controlled zoom spotlight according to claim 1, characterized in that: The light-emitting units on the lamp panel (6) include a first light-emitting group located in the central region and a second light-emitting group located in the peripheral region; The lens (7) includes a focusing unit corresponding to the first light-emitting group and a floodlight unit corresponding to the second light-emitting group; The light emission angle of the focusing unit is smaller than that of the floodlight unit.

3. The electronically controlled zoom spotlight according to claim 2, characterized in that: The PCBA (4) is used to control the first light-emitting group and the second light-emitting group to light up alternately, or to light up simultaneously and adjust the brightness mixing ratio of the two.

4. The electronically controlled zoom spotlight according to claim 1, characterized in that: An adjustment window is provided on the top surface of the rear cover (3), and a dial cover (1) is provided at the adjustment window; The PCBA (4) is provided with a DIP switch corresponding to the adjustment window, and the DIP cover (1) is detachable or flip-up and covers the DIP switch.

5. The electronically controlled zoom spotlight according to claim 1, characterized in that: Mounting seats are provided on the outer walls of both sides of the rear cover (3), and springs (2) for fixing the spotlight to the mounting position are connected to the mounting seats.

6. The electronically controlled zoom spotlight according to claim 1, characterized in that: The heat sink (5) is a metal die-casting part or a thermally conductive plastic part, and its outer or inner surface is provided with a number of heat dissipation ribs. The back of the lamp plate (6) is in close contact with the front end of the heat sink (5).

7. The electronically controlled zoom spotlight according to claim 1, characterized in that: The outer ring (8) has a ring-shaped structure and is detachably connected to the heat sink (5). The inner edge of the outer ring (8) abuts against the edge of the lens (7) to achieve fixation.

8. The electronically controlled zoom spotlight according to claim 1, characterized in that: The lens (7) is a combined lens integrally injection molded. It has several light-inlet slots on one side facing the lamp plate (6) to accommodate the light-emitting unit, and several optical light-emitting surfaces on the side facing away from the lamp plate (6).

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