Lamp capable of accurately detecting initial position of lens
By introducing a reset detector and an initial position detector into the luminaire, and using a magnetic switch to detect the lens position, the problem of inaccurate initial position detection of the lens is solved, achieving precise lens positioning and ideal motion control of the lens, and improving the stability of the light spot and light effect.
Patent Information
- Application Number
- CN202423322671.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2034-12-31
AI Technical Summary
In the existing technology, the initial position detection of the lens is inaccurate, resulting in unsatisfactory lens motion control and affecting the light spot and light effect.
By employing a reset detector and an initial position detector, the position of the lens is detected non-contactly via a magnetic switch, ensuring that the lens stops after contact with the blocking component. The initial position detector determines a specific position as the initial position, and the lens is precisely positioned by combining this with a dual-side drive mechanism.
It achieves precise detection of the initial position of the lens, ensuring more ideal lens motion control and improving the stability of the light spot and light effect.
Smart Images
Figure CN223740631U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of stage lighting technology, and more specifically, to a lighting fixture for accurately detecting the initial position of a lens. Background Technology
[0002] Stage lights typically project over long distances, so even slight changes in the position of the lens used to alter the beam divergence angle can significantly impact the light spot or luminous effect. Therefore, repositioning detection of the lens is crucial. Current detection methods use the position of the lens when it is blocked by the obstruction as the initial position (the rotation angle when the memory motor cannot rotate). However, for buffering purposes, the obstruction is usually elastic. This causes the lens to continue moving due to inertia after being blocked, pressing against the obstruction for a short distance before stopping, resulting in inaccurate initial positioning. Utility Model Content
[0003] To overcome at least one of the defects described in the prior art, this utility model provides a lamp for accurately detecting the initial position of a lens, thereby better controlling the lens movement to the ideal position.
[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a lamp for accurately detecting the initial position of a lens, including a light source located inside the lamp head and a lens for changing the beam divergence angle. Under the drive of the driving mechanism, the lens can move along the light emission direction of the light source. It also includes a reset detector for detecting the lens reset and a blocking member for blocking the movement of the lens. When the lens contacts the blocking member or continues to move and squeeze the blocking member, the reset detector detects the lens. It also includes an initial position detector for detecting the specific position of the lens after it separates from the blocking member.
[0005] The luminaire that precisely detects the initial position of the lens resets the lens via the blocking component, and the reset detector ensures that the lens actually moves to the blocking component before stopping, rather than stopping midway due to jamming. Then, the lens moves in the reverse direction until it reaches a specific position that is detected by the initial position detector. This position is taken as the initial position of the lens. Precise initial position positioning ensures more ideal position control of the lens during the operation of the luminaire.
[0006] Furthermore, the reset detector and / or the initial position detector are magnetic switches. The magnetic switches enable non-contact detection, offer high accuracy, and are low-cost.
[0007] Furthermore, the magnet of the magnetic switch moves with the lens, and the sensing magnet of the magnetic switch is fixed inside the lamp holder. The magnet does not require wiring, so it can move with the lens, while the sensing magnet needs to transmit signals, so fixing it inside the lamp holder is more convenient.
[0008] Furthermore, the initial position detector uses the midpoint between when the magnetic sensor just detects the magnet and when it just loses detection as the detection position. Because the process of the magnetic sensor detecting the magnet lasts for a period of time, using the midpoint between when the magnetic sensor just detects the magnet and when it just loses detection as the detection position results in more accurate positioning.
[0009] Furthermore, the initial position detector is located on the side of the reset detector away from the light source, and the blocking member is located on the side of the reset detector closer to the light source. That is, when the lens resets, it is located at the position closest to the light source.
[0010] Furthermore, there are two initial position detectors, arranged opposite each other on both sides of the lens, and the midpoint of the lens position detected by the two initial position detectors is used as the initial position of the lens. The two initial position detectors can prevent inaccurate initial position positioning due to lens tilt.
[0011] Furthermore, there are two reset detectors. The drive mechanism stops only when both reset detectors detect the lens. The presence of two reset detectors prevents the lens from being considered fully reset due to only one side of the lens abutting the blocking member when the lens is tilted.
[0012] Furthermore, each side of the lens is connected to one of the driving mechanisms, and the two driving mechanisms work together to move the lens along the light emission direction of the light source. The two driving mechanisms facilitate the driving of the heavier lens and can also be adjusted to be horizontal when the lens is tilted.
[0013] Furthermore, the lens is a focusing lens, which allows for adjustment of the sharpness of the light spot formed by the beam.
[0014] Furthermore, it also includes an effect mirror that moves with the focusing lens, the effect mirror being able to selectively enter and exit the optical path. The effect mirror can interfere with the light beam to produce rich light effects.
[0015] Furthermore, the effect mirror is a prism or a fogging mirror. The prism achieves a beam splitting effect, while the fogging mirror achieves a beam uniform effect.
[0016] Furthermore, the lens is a magnifying glass, thereby allowing adjustment of the size of the light spot formed by the beam.
[0017] Furthermore, it also includes an arm that supports the rotation of the lamp head and a housing that supports the rotation of the arm. By rotating the lamp head and the arm, the light beam of the light source can be projected in any direction. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall structure of the lamp for accurately detecting the initial position of the lens according to this utility model.
[0019] Figure 2 This is an exploded structural diagram of the lamp holder of this utility model.
[0020] In the picture:
[0021] 100. Lamp head; 110. Light source; 121. Focusing lens; 122. Magnifying lens; 200. Drive mechanism; 300. Reset detector; 400. Blocking component; 500. Initial position detector; 610. Magnet; 620. Inductive magnetic sensor; 700. Effect lens; 800. Arm; 900. Chassis. Detailed Implementation
[0022] The accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting this patent.
[0023] like Figures 1 to 2 This utility model provides a lamp for accurately detecting the initial position of a lens, including a light source 110 located in a lamp head 100 and a lens for changing the beam divergence angle. Under the drive of a driving mechanism 200, the lens can move along the light emission direction of the light source 110. It also includes a reset detector 300 for detecting the lens reset and a blocking member 400 for blocking the movement of the lens. When the lens contacts the blocking member 400 or continues to move and squeeze the blocking member 400, the reset detector 300 detects the lens. It also includes an initial position detector 500 for detecting the specific position of the lens after it separates from the blocking member 400.
[0024] The luminaire that precisely detects the initial position of the lens resets the lens via the blocking member 400, and the reset detector 300 ensures that the lens actually moves to the blocking member 400 before stopping, rather than stopping midway due to jamming. Then, the lens moves in the reverse direction until it reaches a specific position that is detected by the initial position detector 500. This position is taken as the initial position of the lens, ensuring accurate initial positioning and thus guaranteeing more ideal position control of the lens during the operation of the luminaire.
[0025] Preferably, the reset detector 300 detects the lens when the lens comes into contact with the blocking member 400.
[0026] Preferably, the blocking member 400 is elastic and cushions the lens.
[0027] In a preferred embodiment of this invention, the reset detector 300 and / or the initial position detector 500 are magnetic switches. These magnetic switches enable non-contact detection, offer high accuracy, and are low in cost.
[0028] Optionally, the reset detector 300 and / or the initial position detector 500 may also be a mechanical contact switch or a photoelectric switch.
[0029] In a preferred embodiment of this invention, the magnet 610 of the magnetic switch moves with the lens, and the sensing magnet 620 of the magnetic switch is fixed inside the lamp holder 100. The magnet 610 does not require wiring, so it can move with the lens, while the sensing magnet 620 needs to transmit signals, so fixing it inside the lamp holder 100 is more convenient.
[0030] In this embodiment, both the lens and the magnet 610 are mounted on an aluminum metal frame.
[0031] In a preferred embodiment of this invention, the initial position detector 500 uses the midpoint between when the magnetic sensor 620 first detects the magnet 610 and when it just stops detecting the magnet 610 as the detection position. Because the process of the magnetic sensor 620 detecting the magnet 610 takes a certain amount of time, using the midpoint between when the magnetic sensor 620 first detects the magnet 610 and when it just stops detecting the magnet 610 as the detection position results in more accurate positioning.
[0032] The detection position can be calculated based on the installation positions of the sensing magnet 620 and the magnet 610, and the movement distance of the driving mechanism 200 during this time period.
[0033] In a preferred embodiment of this invention, the initial position detector 500 is located on the side of the reset detector 300 away from the light source 110, and the blocking member 400 is located on the side of the reset detector 300 closer to the light source 110. That is, when the lens resets, it is located at the position closest to the light source 110.
[0034] In a preferred embodiment of this invention, two initial position detectors 500 are arranged opposite each other on both sides of the lens, and the median value of the lens position detected by the two initial position detectors 500 is taken as the initial position of the lens. The two initial position detectors 500 can avoid inaccurate initial position positioning due to lens tilt.
[0035] The initial position can be calculated based on the installation positions of the two initial position detectors 500 and the movement distance of the drive mechanism 200 within the time difference during which they detect the lens.
[0036] Optionally, when both initial position detectors 500 detect the lens simultaneously, the lens is horizontal (i.e., perpendicular to the center of the light beam). Generally, the detection elements of the two initial position detectors 500 are at the same height (i.e., the line connecting the detection elements is perpendicular to the center of the light beam). If necessary, the detection elements of the two initial position detectors 500 can also be at different heights, with the detected elements of the initial position detectors 500 corresponding to their respective heights, thereby ensuring that the lens is horizontal when both initial position detectors 500 detect the lens simultaneously.
[0037] In a preferred embodiment of this invention, there are two reset detectors 300. The driving mechanism 200 stops driving only when both reset detectors 300 detect the lens. The two reset detectors 300 prevent the lens from being considered fully reset simply because it is tilted and only one side of the lens is against the blocking member 400.
[0038] Optionally, when both reset detectors 300 detect the lens simultaneously, the lens is horizontal (i.e., perpendicular to the center of the light beam). Generally, the detection elements in the two reset detectors 300 are at the same height (i.e., the line connecting the detection elements is perpendicular to the center of the light beam). If necessary, the detection elements of the two reset detectors 300 can also be at different heights, with the detected element of each reset detector 300 corresponding to its height, thereby ensuring that the lens is horizontal when both reset detectors 300 detect the lens simultaneously.
[0039] In a preferred embodiment of this invention, each side of the lens is connected to a driving mechanism 200, and the two driving mechanisms 200 work together to move the lens along the light emission direction of the light source 110. The two driving mechanisms 200 facilitate driving the heavier lens and can also be adjusted to a horizontal position when the lens is tilted.
[0040] When the lens is tilted, during the reset process, if one side of the lens abuts against the blocking member 400, the driving mechanism 200 on that side stops rotating, and the other side of the lens will continue to move under the drive of the other driving mechanism 200 until it abuts against the blocking member 400, thereby achieving the leveling of the lens.
[0041] In a preferred embodiment of this invention, the lens is a focusing lens 121. This allows for adjustment of the sharpness of the light spot formed by the beam.
[0042] Optionally, the focusing lens 121 can be used in moving head lights, or in color-changing lights (in which case the number of focusing lenses 121 is generally set to multiple corresponding to the light source 110), or in projection lights, or in other lights that require focusing.
[0043] In this embodiment, each side of the focusing lens 121 is connected to one of the driving mechanisms 200.
[0044] In a preferred embodiment of this invention, an effect mirror 700 is further included, which moves with the focusing lens 121. The effect mirror 700 can selectively enter and exit the optical path. The effect mirror 700 can interfere with the light beam to produce rich light effects.
[0045] Optionally, the number of effect mirrors 700 can be one or more, or they can be of one or more types, or different types of the same type.
[0046] In a preferred embodiment of this invention, the effect mirror 700 is a prism or a fogging mirror. The prism achieves a light-splitting effect, while the fogging mirror achieves a light-uniforming effect. The lamp may have multiple fogging mirrors with different degrees of fogging, or multiple prisms of different types.
[0047] In a preferred embodiment of this invention, the lens is a magnifying glass 122. This allows for adjustment of the size of the light spot formed by the light beam.
[0048] In this embodiment, the focusing lens 121 is connected to one of the driving mechanisms 200 on one side.
[0049] In this embodiment, the lamp head 100 contains both the focusing lens 121 and the magnifying lens 122, and the reset detector 300, the blocking member 400, and the initial position detector 500 are all configured corresponding to the focusing lens 121.
[0050] In a preferred embodiment of this invention, the system further includes an arm 800 that supports the rotation of the lamp head 100 and a housing 900 that supports the rotation of the arm 800. By rotating the lamp head 100 and the arm 800, the light beam from the light source 110 can be projected in any direction.
[0051] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A luminaire capable of accurately detecting the initial position of a lens, characterized by, The lamp comprises a light source (110) in a lamp head (100), a lens for changing the divergence angle of the light beam, the lens being movable along the light emitting direction of the light source (110) under the drive of a drive mechanism (200), a reset detector (300) for detecting the reset of the lens, a blocking member (400) for blocking the movement of the lens, the reset detector (300) detecting the lens when the lens contacts or continues to move and presses the blocking member (400), and an initial position detector (500) for detecting a specific position of the lens after the lens is separated from the blocking member (400).
2. The luminaire of claim 1, wherein, The reset detector (300) and / or the initial position detector (500) are magnetic sensitive switches.
3. The luminaire of claim 2, wherein, The magnet (610) of the magnetic sensitive switch moves with the lens, and the inductive magnetic sensitive element (620) of the magnetic sensitive switch is fixed in the lamp head (100).
4. The luminaire of claim 2 or 3, wherein, The intermediate position of the inductive magnetic sensitive element (620) just detecting the magnet (610) and just losing the detection of the magnet (610) is the detection position of the initial position detector (500).
5. The luminaire of claim 1, wherein, The initial position detector (500) is located on the side of the reset detector (300) away from the light source (110), and the blocking member (400) is located on the side of the reset detector (300) close to the light source (110).
6. The luminaire of claim 1, wherein, The number of the initial position detectors (500) is two, and the two initial position detectors (500) are oppositely arranged on the two sides of the lens, and the intermediate value of the positions of the lens detected by the two initial position detectors (500) is the initial position of the lens.
7. The luminaire of claim 1, wherein, The number of the reset detectors (300) is two, and the drive mechanism (200) stops driving only when both of the two reset detectors (300) detect the lens.
8. The luminaire of claim 1, wherein, The two sides of the lens are connected with one drive mechanism (200) respectively, and the lens is moved along the light emitting direction of the light source (110) under the common drive of the two drive mechanisms (200).
9. The luminaire of claim 1, wherein, The lens is a focusing mirror (121).
10. The luminaire of claim 9, wherein, The lamp further comprises an effect mirror (700) moving with the focusing mirror (121), and the effect mirror (700) can selectively cut into and cut out the light path.
11. The luminaire of claim 10, wherein, The effect mirror (700) is a prism or a fogging mirror.
12. The luminaire of claim 1, wherein, The lens is a magnifying mirror (122).
13. The luminaire of claim 1, wherein, The lamp further comprises an arm (800) supporting the rotation of the lamp head (100) and a case (900) supporting the rotation of the arm (800).