Electric focusing mechanism

Abstract

The utility model discloses an electric focusing mechanism, and belongs to the technical field of focusing control of illumination optical equipment. Comprising a focusing installation support, a pair of microswitches, a motor sliding table, a focusing lens assembly and an induction limiting plate, the microswitches are arranged at intervals in the length direction of the focusing installation support, the motor sliding table is arranged on one side of the pair of microswitches, the focusing lens assembly is fixedly connected with the motor sliding table, and the induction limiting plate is arranged on the focusing lens assembly. One end of the induction limiting plate is fixedly connected with the focusing lens assembly, the other end of the induction limiting plate extends to the position between the pair of microswitches and moves back and forth between the pair of microswitches along with movement of the motor sliding table, and when the induction limiting plate makes contact with the microswitches, the microswitches send signals to enable the motor sliding table to move reversely. The utility model has the advantages that the purpose of electric focusing is achieved, the operability is improved, and manual operation is avoided, so that the focusing precision can be effectively ensured, and the labor intensity is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of focus control of lighting optical equipment, and particularly relates to an electric focus mechanism. Background Art

[0002] Optical lighting devices with high-brightness light sources and highly focused illumination, such as laser searchlights and LED searchlights, are widely used in navigation, aviation, rescue, and other fields due to their convenient long-range lighting and signal transmission capabilities. When performing long-range illumination and target search, these lamps sometimes require timely adjustment of their illumination range based on on-site conditions. For example, during nighttime operations, searchlights can be focused to concentrate the light on a designated operating area, enhancing the brightness within that area.

[0003] Traditional lighting optical equipment relies on manual rotary focusing. This manual method is labor-intensive, inefficient, and difficult to maintain consistent focusing accuracy, compromising accuracy and causing significant inconvenience in lighting tasks. Furthermore, manual operation hinders rapid remote control and automated operation, making it unsuitable for modern intelligent and efficient work. Consequently, the development of an electric focusing mechanism is urgently needed. The applicant has developed a beneficial design, and the technical solution described below was developed in this context. Utility Model Content

[0004] The purpose of the utility model is to provide an electric focusing mechanism which has a simple structure, improves operability and can effectively ensure focusing accuracy.

[0005] The purpose of the utility model is achieved in this way. An electric focusing mechanism includes a focusing mounting bracket, a micro switch, a motor slide, a focusing lens assembly and an inductive limit plate. There is a pair of micro switches, which are spaced apart along the length direction of the focusing mounting bracket. The motor slide is arranged on one side of the pair of micro switches. The focusing lens assembly is fixedly connected to the motor slide. One end of the inductive limit plate is fixedly connected to the focusing lens assembly, and the other end extends between the pair of micro switches. It moves back and forth between the pair of micro switches as the motor slide moves. When the inductive limit plate contacts the micro switch, the micro switch sends a signal to cause the motor slide to move in the opposite direction.

[0006] In a specific embodiment of the present invention, the focusing mounting bracket is installed at the light outlet of the light source, and one end of the focusing mounting bracket in the length direction is bent downward to form a mounting plate for installation and fixation.

[0007] In another specific embodiment of the present invention, the motor slide includes a screw rod, a slider that is inserted into the screw rod and slides with the screw rod, and a U-shaped plate that supports the screw rod, and the slider is driven by a motor.

[0008] In another specific embodiment of the present invention, the focusing lens assembly includes a lens group and a base supporting the lens group, the sensing limit plate is composed of a horizontal plate and a vertical plate to form an L-shaped structure, the bottom of the lens group is fixedly connected to the base, and a side surface of the base corresponding to the irradiation direction of the lens group is fixedly connected to the horizontal plate of the sensing limit plate, and the base extends at the bottom to form a pair of mounting ears, and the pair of mounting ears are located on both sides of the slider of the motor slide and are fixed to the slider.

[0009] In another specific embodiment of the present invention, the lens center hole of the lens assembly and the light outlet of the light source are concentrically arranged.

[0010] Due to the adoption of the above structure, the utility model has the following beneficial effects compared with the prior art: the overall structure is simple, the installation is convenient, and the cost is low. The movement of the focusing lens group is controlled by an external control system to achieve the purpose of electric focusing, which improves operability, can realize remote control, eliminates manual operation, can effectively ensure the focusing accuracy, and reduces labor intensity. The focusing mounting bracket can be designed to match the installation position according to the specific light source, has high adaptability, and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is an exploded view of the structure of the present utility model;

[0012] Figure 2 It is a schematic diagram of the overall structure of the utility model.

[0013] In the figure: 1. Focus mounting bracket, 11. Mounting plate; 2. Micro switch; 3. Motor slide, 31. Screw rod, 32. Slider, 33. U-shaped plate; 4. Focus lens assembly, 41. Lens group, 411. Lens center hole, 42. Base, 421. Mounting ear; 5. Induction limit plate, 51. Horizontal plate, 52. Vertical plate. DETAILED DESCRIPTION

[0014] The specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings. However, the description of the embodiments does not limit the technical solution. Any changes in form rather than substance based on the concept of the present invention should be regarded as within the scope of protection of the present invention.

[0015] In the following description, all concepts related to directionality (or orientation) such as up, down, left, right, front and back are with respect to the position state of the figure being described, and are intended to facilitate public understanding. Therefore, they should not be understood as special limitations on the technical solutions provided by the present invention.

[0016] See Figure 1 and Figure 2The present invention relates to an electric focusing mechanism, comprising a focusing mounting bracket 1, a microswitch 2, a motor slide 3, a focusing lens assembly 4, and an inductive limit plate 5. A pair of microswitches 2 are provided, spaced apart along the length of the focusing mounting bracket 1. The motor slide 3 is positioned on either side of the pair of microswitches 2 and comprises a lead screw 31, a slider 32 threaded through the lead screw 31, and a U-shaped plate 33 supporting the lead screw 31. The slider 32 is driven by a motor and slides along the lead screw 31. The focusing lens assembly 4 is fixedly connected to the slider 32 of the motor slide 3. During application, an appropriate motor slide 3 should be selected based on the size and focusing range of the focusing lens assembly 4. The shape of the focusing lens assembly 4 can also be modified based on the actual lens assembly required to ensure that the focusing lens assembly 4 can be accurately and securely mounted on the motor slide 3. One end of the inductive limit plate 5 is fixedly connected to the focusing lens assembly 4, and the other end extends between the pair of microswitches 2. The inductive limit plate 5 moves back and forth between the pair of microswitches 2 as the slider 32 moves. The inductive limit plate 5 is used to contact the micro switch 2, ensuring the direction of the motor slide 3, allowing the focus lens assembly 4 to be adjusted back and forth within its travel range. When the micro switch 2 is touched, it sends a signal to the external control circuit, which controls the motor of the motor slide 3 to reverse direction. This process is conventional and will not be described in detail.

[0017] Furthermore, the focusing lens assembly 4 includes a lens assembly 41 and a base 42 supporting the lens assembly 41. The sensing limit plate 5 is formed into an L-shaped structure by a horizontal plate 51 and a vertical plate 52. The bottom of the lens assembly 41 is fixedly connected to the base 42, and the side of the base 42 corresponding to the direction of illumination of the lens assembly 41 is fixedly connected to the horizontal plate 51 of the sensing limit plate 5 via screws. The base 42 has a pair of mounting ears 421 extending from the bottom. These ears 421 are located on either side of the slider 32 of the motor slide 3 and are fixed to the slider 32 via screws.

[0018] Furthermore, the focusing mounting bracket 1 is bent downward at one end in the longitudinal direction to form a mounting plate 11 for mounting and fixing. The focusing mounting bracket 1 is installed at the light outlet of the light source, and the lens center hole 411 of the lens group 41 is arranged concentrically with the light outlet of the light source. The focusing lens assembly 4 is driven by a motor slide 3 and slides within the travel range formed by a pair of micro switches 2 for focusing. When the light source illuminator and the focus of the lens coincide with each other, the spot area of ​​the light beam is minimized and the luminous intensity of the lamp is high. When the light source illuminator and the focus of the lens deviate from each other, the spot area of ​​the light beam expands and the luminous intensity of the lamp decreases.

[0019] The utility model can be widely used in optical lighting devices such as laser focusing mechanisms and LED focusing mechanisms to facilitate accurate and convenient focal length focusing operations.

Claims

1. An electric focusing mechanism, characterized in that: The invention comprises a focusing mounting bracket (1), a micro switch (2), a motor slide (3), a focusing lens assembly (4) and an inductive limit plate (5), wherein the micro switch (2) is provided in a pair and is spaced apart along the length direction of the focusing mounting bracket (1), the motor slide (3) is provided on one side of the pair of micro switches (2), the focusing lens assembly (4) is fixedly connected to the motor slide (3), one end of the inductive limit plate (5) is fixedly connected to the focusing lens assembly (4), and the other end extends between the pair of micro switches (2), and moves back and forth between the pair of micro switches (2) as the motor slide (3) moves, and when the inductive limit plate (5) contacts the micro switch (2), the micro switch (2) sends a signal to make the motor slide (3) move in the opposite direction.

2. The electric focusing mechanism according to claim 1, characterized in that: The focusing mounting bracket (1) is mounted on the light outlet of the light source, and one end of the focusing mounting bracket (1) is bent downward in the length direction to form a mounting plate (11) for mounting and fixing.

3. The electric focusing mechanism according to claim 1, characterized in that: The motor slide (3) comprises a screw rod (31), a slider (32) passing through the screw rod (31) and slidingly cooperating with the screw rod (31), and a U-shaped plate (33) supporting the screw rod (31); the slider (32) is driven by a motor.

4. The electric focusing mechanism according to claim 3, characterized in that: The focusing lens assembly (4) includes a lens group (41) and a base (42) supporting the lens group (41); the inductive limiting plate (5) is formed into an L-shaped structure by a horizontal plate (51) and a vertical plate (52); the bottom of the lens group (41) is fixedly connected to the base (42); a side surface of the base (42) corresponding to the irradiation direction of the lens group (41) is fixedly connected to the horizontal plate (51) of the inductive limiting plate (5); a pair of mounting ears (421) are formed on the bottom of the base (42); the pair of mounting ears (421) are located on both sides of a slider (32) of the motor slide (3) and are fixed to the slider (32).

5. The electric focusing mechanism according to claim 4, characterized in that: The lens center hole (411) of the lens group (41) and the light outlet of the light source are concentrically arranged.

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