Stage follow spotlight

Abstract

The invention relates to a stage follow spotlight, and belongs to the technical field of stage follow spotlights. The stage follow spotlight comprises a support, a spotlight body arranged on the support, a gyroscope arranged on the spotlight body and a balance assembly. The balancing assembly comprises a screw rod, a guide rail, a balancing weight and a motor, the screw rod and the guide rail are in the same direction, the screw rod is arranged in the axial direction of the lamp body, and the screw rod is connected with a motor shaft of the motor; and the balancing weight is in sliding fit with the guide rail and is in threaded fit with the screw rod. According to the scheme, the center-of-gravity information of the lamp body can be monitored in real time, the center-of-gravity shift problem is solved, the operation stability of the stage follow spot lamp is improved, and the positioning follow spot effect is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of stage follow spot lights, and in particular to a stage follow spot light. Background Art

[0002] The use of stage lighting is an indispensable and important means in stage art, which can highlight key areas, performer images and create an atmosphere. As a lighting compensation device, the stage follow spot moves with the performer under the control of the lighting engineer or control system, highlighting the performer in the form of a light column, thereby improving the performance effect.

[0003] Existing stage follow-spots are generally composed of a lamp body and a bracket. They rely on horizontal and vertical rotation mechanisms to achieve the horizontal rotation axis and vertical up and down swing of the lamp body. Various different devices are integrated inside the lamp body, and the weight is relatively large. In the default state of power on, it basically maintains a balanced state. However, when focusing the light effect, the center of gravity of the stage follow-spot will change due to the axial movement of the optical lens, which may cause the light column to shake or lose its position when the lighting engineer is operating, or cause the control system to be unable to locate the follow-spot according to the performer's movements. Summary of the invention

[0004] In order to overcome the problems existing in the related art, the present application provides a stage follow spot light, which can monitor the center of gravity information of the lamp body in real time, solve the problem of center of gravity offset, improve the operating stability of the stage follow spot light, and ensure the positioning follow spot effect.

[0005] The present application provides a stage follow spot light, comprising a bracket, a lamp body arranged on the bracket, a gyroscope and a balance component arranged on the lamp body;

[0006] The balancing assembly includes a screw, a guide rail, a counterweight and a motor, wherein the screw is in the same direction as the guide rail, the screw is arranged along the axial direction of the lamp body, and the screw is connected to the motor shaft of the motor;

[0007] The counterweight block is slidably matched with the guide rail and is matched with the screw thread.

[0008] In some embodiments, the balancing assembly further includes an electromagnetic switch and a locking portion, wherein the electromagnetic switch is used to control the locking portion to engage with or move away from the motor shaft, and the locking portion is used to brake the screw so that the screw can be in a locked state.

[0009] In some embodiments, the locking portion includes an iron valve core, a spring, and an upper valve seat and a lower valve seat that can be engaged with each other;

[0010] A chamber is formed between the upper valve seat and the lower valve seat, and the lower valve seat is provided with a hole cavity penetrating through both ends of the lower valve seat;

[0011] The first end of the iron valve core is radially enlarged to form a cover body, and the second end is provided with a locking groove for clamping the motor shaft. The iron valve core is penetrated by a hole cavity, and the cover body is located in the cavity;

[0012] The spring is sleeved with an iron valve core, and two ends of the spring are respectively connected to the lower valve seat and the cover body.

[0013] In some embodiments, the diameter of the locking groove gradually decreases inwardly.

[0014] In some embodiments, one end of the motor shaft facing the locking groove is coated with a silicone layer.

[0015] In some embodiments, a shell is provided at the bottom of the lamp body, and two fixing plates are provided inside the shell; the screw and the guide rail are located between the two fixing plates, the screw is connected to the fixing plates via a bearing, and the motor is mounted on the fixing plates.

[0016] In some embodiments, a magnet is disposed on the counterweight block, and a Hall sensor is disposed on a side surface of the fixing plate facing the counterweight block, for collecting magnetic field change information of the magnet.

[0017] In some embodiments, the Hall sensor includes a sensing element and an information processing element, the sensing element is used to sense the magnetic field change information of the magnet, and the information processing element is used to output the displacement of the counterweight according to the magnetic field change information.

[0018] In some embodiments, the number of the Hall sensors is two, and the two Hall sensors are respectively located at two ends of the screw.

[0019] The technical solution provided by this application may have the following beneficial effects:

[0020] The stage follow spot provided by the present application, when in operation, uses a gyroscope to monitor in real time the center of gravity shift caused by the change of the center of gravity of the lamp body during the focusing process, and controls the rotation of the motor according to the axis tilt information of the lamp body, so that the counterweight can realize axial movement on the screw rod, and then adjust the center of gravity of the lamp body, so that the stage follow spot can achieve the purpose of automatic balance, thereby ensuring the positioning and following light effect of the stage follow spot. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and other objects, features and advantages of the present application will become more apparent through a more detailed description of exemplary embodiments of the present application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present application.

[0022] Figure 1 is a structural schematic diagram of a stage follow spot light shown in Example 1 of the present application;

[0023] Figure 2is a schematic structural diagram of a balancing assembly shown in Example 1 of the present application;

[0024] Figure 3 is an exploded schematic diagram of the balancing assembly shown in Example 1 of the present application;

[0025] Figure 4 It is a schematic diagram of the structure of the locking portion shown in Example 2 of the present application.

[0026] Reference numerals:

[0027] 1. Bracket; 2. Lamp body;

[0028] 3. Balance assembly; 30. Screw; 31. Guide rail; 32. Counterweight; 33. Motor; 34. Solenoid switch; 35. Locking part; 350. Iron valve core; 351. Spring; 352. Upper valve seat; 353. Lower valve seat; 354. Chamber; 355. Hole cavity; 356. Cover; 357. Locking groove;

[0029] 4. Housing; 41. Fixing plate; 42. Bearing; 5. Hall sensor. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0031] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms of "a", "said" and "the" used in this application and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0032] It should be understood that although the present application may use the terms "first", "second", "third", etc. to describe various information, this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0033] In the prior art, the center of gravity of the stage follow spot is inevitably shifted during the focusing process, which has little effect on manual operation. However, for positioning and following the light using an automated control system, it is necessary to set up a corresponding control mechanism and a rotation mechanism that can allow the stage follow spot to move horizontally and vertically. Therefore, the stage follow spot with a rotation mechanism will inevitably cause excessive movement due to the center of gravity shift. A corrective measure that makes it difficult for the horizontal rotation mechanism and the vertical rotation mechanism to be adjusted to the optimal state is to adjust the stability of the horizontal rotation mechanism and the vertical rotation mechanism through a balancing component.

[0034] In view of the above problems, the embodiment of the present application provides a stage follow spot, which can monitor the center of gravity information of the lamp body 2 in real time, solve the problem of center of gravity offset, improve the operation stability of the stage follow spot, and ensure the positioning follow spot effect.

[0035] The technical solution of the embodiments of the present application is described in detail below with reference to the accompanying drawings.

[0036] Example 1

[0037] Figure 1 It is a structural schematic diagram of a stage follow spot light shown in an embodiment of the present application;

[0038] Figure 2 It is a schematic diagram of the structure of the balancing component 3 shown in the embodiment of the present application.

[0039] Embodiment 1 of the present application provides a stage follow spot light, which can monitor the center of gravity shift of the lamp body 2 caused by the change of the center of gravity during the focusing process of the stage follow spot light through a gyroscope, and then control the motor 33 to rotate according to the center of gravity shift information, drive the counterweight block 32 to achieve axial movement on the screw 30, and then readjust the center of gravity of the lamp body 2 to ensure the stable operation of the positioning follow spot, please refer to Figure 1 and Figure 2 The stage follow spot light comprises a bracket 1, a lamp body 2 arranged on the bracket 1, a gyroscope and a balance component 3 arranged on the lamp body 2;

[0040] The balancing assembly 3 includes a screw 30, a guide rail 31, a counterweight 32 and a motor 33. The screw 30 is in the same direction as the guide rail 31, the screw 30 is arranged along the axial direction of the lamp body 2, and the screw 30 is connected to the motor 33 shaft of the motor 33;

[0041] The counterweight block 32 is slidably matched with the guide rail 31 and threadedly matched with the screw rod 30 .

[0042] The lamp body 2, the bracket 1, and the connection between the lamp body 2 and the bracket 1 through a horizontal rotation mechanism and a vertical rotation mechanism belong to the conventional application of the prior art. The lamp assembly includes a light source module, a heat sink assembly, a fan module, a focusing and magnifying module, and a controller. The gyroscope and the motor 33 are both connected to the controller. The gyroscope monitors the center of gravity information of the lamp body 2 and sends it to the controller. The controller receives the center of gravity information for analysis, and controls the rotation of the motor 33 with the analyzed information data combined with the built-in program, thereby driving the counterweight 32 to move to the set position to readjust the center of gravity of the lamp body 2. In this embodiment, the gyroscope can be set at any position in the lamp body 2 without affecting the light source module, the heat sink assembly, the fan module, the focusing and magnifying module, and the controller. The stage follow spot is a long cylindrical structure. During the focusing process, the optical lens of the focusing and magnifying module moves axially to change the center of gravity of the stage follow spot. When performing positioning and chasing light, it is difficult for the lighting engineer to make subtle adjustments to the center of gravity change when manual on-site control is used. In this case, it can be understood that when the lighting engineer holds the stage chasing light and controls the stage chasing light, he manually presses one end of the stage chasing light light lightly. Therefore, under the original control force, the light column will inevitably shake or lose its position. When the stage chasing light is controlled by an automated system, the change in the center of gravity of the chasing light will further cause the chasing light to have an axial deflection. When the control system continues to drive the stage chasing light according to the preset control logic, the stage chasing light has already had an axial deflection, that is, there is a certain deviation in the irradiation direction of the stage chasing light, which makes the control system unable to achieve stable operation of positioning and chasing light.

[0043] For example, when the stage follow spot is focusing, the lens of the stage follow spot is 1° lower than the preset lens angle due to the relative movement of the lens in the lamp body 2. At this time, the gyroscope sends the detected 1° deflection value to the controller, and the controller controls the motor 33 to rotate, so that the counterweight 32 moves away from the lens until the stage follow spot returns to the center of gravity balance in the default state.

[0044] It should be noted that the center of gravity balance in the default state refers to the axial angle of the current stage follow spot set after the control command is input to the stage follow spot according to the relative position between the stage follow spot and the stage scene, the path of the positioning follow spot, the change of the light column light effect, etc. Therefore, the center of gravity balance in the default state does not mean that the two ends of the stage follow spot are on the same horizontal plane.

[0045] In the present embodiment 1, the motor 33 can adopt a stepper motor, which is a motor that converts an electrical pulse signal into a corresponding angular displacement or linear displacement. Each time a pulse signal is input, the rotor rotates an angle or moves forward one step, and the angular displacement or linear displacement outputted is proportional to the number of pulses inputted, and the rotation speed is proportional to the pulse frequency. Therefore, the stepper motor can accurately control the rotation amplitude of the screw 30, and then can accurately locate the moving distance of the counterweight 32. On the basis of the above-mentioned specific embodiments, those skilled in the art can freely set the thread density between the screw 30 and the counterweight 32 and the length of the screw 30. For example, after the stepper motor drives the screw 30 to rotate one circle, the stroke of the counterweight 32 can be set to 1mm.

[0046] The guide rail 31 is in the same direction as the screw 30. The guide rail 31 mainly limits the counterweight 32 from rotating along with the screw 30, so that the counterweight 32 can only move along the axial direction of the lamp body. The number of guide rails 31 can be one or more. Lubricating oil can also be applied between the counterweight 32 and the screw 30 and the guide rail 31 to reduce the friction between them, reduce the torque effect on the stepper motor, and improve the smoothness of the operation of the balancing assembly 3.

[0047] Compared with the prior art, the stage follow spot provided in Example 1 of the present application can monitor the center of gravity shift of the lamp body 2 caused by the change of the center of gravity during the focusing process in real time through a gyroscope during the operation of the lamp body 2, and can control the rotation of the motor 33 according to the axis tilt information of the lamp body 2, so that the counterweight can realize axial movement on the screw 30, and then adjust the center of gravity of the lamp body 2, so that the stage follow spot can achieve the purpose of automatic balance, thereby ensuring the positioning and following light effect of the stage follow spot.

[0048] Example 2

[0049] In practical applications, in order to ensure that the follow spot light can maintain the existing balance state when the power is off and to prevent the counterweight block 32 from moving on its own due to the virtual position, the embodiment 2 of the present application also designs a corresponding structure. Figures 2 to 4, by setting the electromagnetic switch 34 and the locking part 35, when the power is on, the locking part 35 is away from the motor 33 shaft of the motor 33, and when the power is off, the locking part 35 is engaged to lock the motor 33 shaft. The stage follow spot provided in Example 2 of the present application, the above-mentioned balance assembly 3 also includes an electromagnetic switch 34 and a locking part 35, the electromagnetic switch 34 is used to control the locking part 35 to engage or be away from the motor 33 shaft, and the locking part 35 is used to brake the screw 30 so that the screw 30 can be in a locked state. When the power is off, the motor 33 stops, and the motor 33 shaft is stopped in a free-style manner. When the motor 33 is running, the sudden power failure plus the inertia of the mechanical movement will drive the counterweight 32 to continue to move. The combination of the electromagnetic switch 34, the locking part 35 and the stepping motor forms a brake stepping motor, which can brake the motor 33 shaft when the power is off, thereby improving the safety performance of the stepping motor.

[0050] Furthermore, the locking part 35 of the stage follow spot light comprises an iron valve core 350, a spring 351, and an upper valve seat 352 and a lower valve seat 353 which can be buckled with each other;

[0051] A chamber 354 is formed between the upper valve seat 352 and the lower valve seat 353, and the lower valve seat 353 is provided with a hole 355 that passes through both ends of the lower valve seat 353;

[0052] The first end of the iron valve core 350 is radially enlarged to form a cover body 356, and the second end is provided with a locking groove 357 for clamping the shaft of the motor 33. The iron valve core 350 is penetrated by a cavity 355, and the cover body 356 is located in the chamber 354;

[0053] The spring 351 is sleeved with the iron valve core 350, and the two ends of the spring 351 are respectively connected to the lower valve seat 353 and the cover body 356. In the power-on state, the electromagnetic switch 34 attracts the iron valve core 350 through magnetic force. At this time, the iron valve core 350 and the shaft of the motor 33 are in a partition device, and the iron valve core 350 does not interfere with the operation of the motor 33. In the power-off state, the spring 351 is reset and contracted by its own elastic force, and drives the iron valve core 350 to clamp the shaft of the motor 33. The locking part 35 is set at the rear end of the motor 33, and the shaft of the motor 33 is exposed outside the motor 33 and is opposite to the locking groove 357 of the iron valve core 350.

[0054] In another feasible solution, the locking portion 35 may be directly disposed at the end of the screw rod 30 to brake the screw rod 30 .

[0055] Furthermore, in order to increase the bite force of the locking groove 357 on the shaft of the motor 33, the aperture of the locking groove 357 of the stage follow spot light gradually decreases inwardly.

[0056] Furthermore, the end of the motor 33 shaft of the stage follow spot lamp facing the locking groove 357 is coated with a silicone layer. The aperture of the locking groove 357 gradually decreases inwardly, which can ensure that the motor 33 shaft can be deeply engaged in the locking groove 357 under the action of the elastic force of the spring 351. By coating a layer of silicone on the motor 33 shaft, the friction between the motor 33 shaft and the iron valve core 350 can be further increased, ensuring that the screw 30 is locked under the action of the iron valve core 350 and the spring 351.

[0057] Specifically, when the stage follow spot is in the power-on state, the electromagnetic switch 34 generates a magnetic field, and the iron valve core 350 is attracted by the magnetic force. After overcoming the elastic force of the spring 351, the iron valve core 350 moves along the cavity 355 toward the electromagnetic switch 34, so that the locking groove 357 can be away from the motor 33 shaft. Therefore, the stepper motor can rotate normally, and the screw 30 fixed on the motor 33 shaft can rotate normally, and under the action of the guide rail 31, it moves along the axial direction of the screw 30. When the stage follow spot light is suddenly powered off, the magnetic field of the electromagnetic switch 34 disappears, and the iron valve core 350 is tightly inserted into the locking groove 357 under the force of the spring 351. The motor 33 shaft generates friction torque with the inner surface of the locking groove 357 during the process of penetrating into the locking groove 357, thereby limiting the rotation of the motor 33 shaft, achieving a rapid braking effect, maintaining the center of gravity of the current stage follow spot light, and ensuring that the stage follow spot light can still maintain balance in the power-off state, thereby preventing the stage follow spot light from falling off the bracket 1 and affecting the customer experience.

[0058] Example 3

[0059] In actual applications, although the speed and number of revolutions of the motor 33 can be obtained to calculate the stroke of the counterweight 32, and then in the initialization stage of the stage follow spot light or to realize the self-check and reset of the counterweight 32, the coordination between the screw 30 and the motor 33 may have certain formation errors after long-term use. In this case, it takes a long time to realize the self-check and reset through the coordination of the number of revolutions of the motor 33 and the gyroscope. In order to avoid the above-mentioned defects, the embodiment 3 of the present application also designs a corresponding structure. On the basis of embodiments 1 and 2, a Hall sensor 5 is arranged on the balance component 3, and a magnet is arranged on the counterweight 32 to realize the stroke detection of the counterweight 32, and then realize the initial self-check and reset, such as Figure 2 and Figure 3 As shown, a shell 4 is provided at the bottom of the lamp body 2 of the stage follow spot light in Example 3 of the present application, and two fixing plates 41 are provided in the shell 4; the screw 30 and the guide rail 31 are located between the two fixing plates 41, the screw 30 is connected to the fixing plate 41 through a bearing 42, and the motor 33 is installed on the fixing plate 41.

[0060] Furthermore, a magnet is disposed on the counterweight block 32 of the stage follow spot light, and a Hall sensor 5 is disposed on a side surface of the fixing plate 41 facing the counterweight block 32 for collecting magnetic field change information of the magnet.

[0061] Specifically, when the stepper motor drives the counterweight 32 to move along the axis of the lamp body 2, the Hall sensor 5 collects the magnetic field change information of the magnet on the counterweight 32 and feeds it back to the controller. The controller determines the current stroke position of the counterweight 32 based on the magnetic field change information, and controls the motor 33 to drive the counterweight 32 to reset according to the program requirements, so that the center of gravity of the stage follow spot returns to the initial position.

[0062] Furthermore, the Hall sensor 5 of the above-mentioned stage follow spot includes a sensing element and an information processing element, wherein the sensing element is used to sense the magnetic field change information of the magnet, and the information processing element is used to output the displacement of the counterweight 32 according to the magnetic field change information. The sensing element can be a Hall chip. The Hall chip can collect the magnetic field signal of the magnet and convert the magnetic field signal into a digital signal representing the current angle value. A magnetic concentrator (IMC) is provided in the Hall chip, which can collect the magnetic field acting parallel to the surface of the Hall chip and generate a vertical component proportional to the magnetic field at the edge of the IMC structure, and then measure this signal through two pairs of traditional planar Hall elements located below the IMC.

[0063] Furthermore, the number of the Hall sensors 5 of the above-mentioned stage follow spot is two, and the two Hall sensors 5 are respectively located at the two ends of the screw rod 30. A Hall sensor 5 is respectively arranged at the two ends of the screw rod 30, that is, on the two fixing plates 41, so as to improve the detection accuracy of the counterweight block 32 and ensure the accuracy of self-checking and resetting.

[0064] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A stage follow spot, characterized in that: It includes a bracket, a lamp body arranged on the bracket, a gyroscope and a balancing component arranged on the lamp body; The balancing assembly includes a screw, a guide rail, a counterweight and a motor, wherein the screw is in the same direction as the guide rail, the screw is arranged along the axial direction of the lamp body, and the screw is connected to the motor shaft of the motor; The counterweight block is slidably matched with the guide rail and is matched with the screw thread.

2. The stage follow spot according to claim 1, characterized in that: The balancing assembly also includes an electromagnetic switch and a locking portion, wherein the electromagnetic switch is used to control the locking portion to engage with or move away from the motor shaft, and the locking portion is used to brake the screw so that the screw can be in a locked state.

3. The stage follow spot according to claim 2, characterized in that: The locking part includes an iron valve core, a spring, and an upper valve seat and a lower valve seat that can be buckled with each other; A chamber is formed between the upper valve seat and the lower valve seat, and the lower valve seat is provided with a hole cavity penetrating through both ends of the lower valve seat; The first end of the iron valve core is radially enlarged to form a cover body, and the second end is provided with a locking groove for clamping the motor shaft. The iron valve core is penetrated by a hole cavity, and the cover body is located in the cavity; The spring is sleeved with an iron valve core, and two ends of the spring are respectively connected to the lower valve seat and the cover body.

4. The stage follow spot according to claim 3, characterized in that: The aperture of the locking groove gradually decreases inwardly.

5. The stage follow spot according to claim 4, characterized in that: One end of the motor shaft facing the locking groove is coated with a silicone layer.

6. The stage follow spot according to claim 1, characterized in that: A shell is provided at the bottom of the lamp body, and two fixing plates are provided in the shell; the screw and the guide rail are located between the two fixing plates, the screw is connected to the fixing plates through a bearing, and the motor is installed on the fixing plates.

7. The stage follow spot according to claim 6, characterized in that: The counterweight block is provided with a magnet, and the fixed plate is provided with a Hall sensor on one side facing the counterweight block, for collecting magnetic field change information of the magnet.

8. The stage follow spot according to claim 7, characterized in that: The Hall sensor includes a sensing element and an information processing element. The sensing element is used to sense the magnetic field change information of the magnet, and the information processing element is used to output the displacement of the counterweight according to the magnetic field change information.

9. The stage follow spot according to claim 8, characterized in that: The number of the Hall sensors is two, and the two Hall sensors are respectively located at two ends of the screw.

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