Cutter and stage lamp with same

Abstract

The utility model discloses a cutter and a stage lamp with the cutter, and the cutter comprises a substrate with a light through hole, a light shielding sheet used for shielding light, and a first driving mechanism and a second driving mechanism which are pivoted to the light shielding sheet and drive the light shielding sheet to move in a plane, the first driving mechanism is in pivot joint with the anti-dazzling screen through a first pivot joint point, the second driving mechanism is in pivot joint with the anti-dazzling screen through a second pivot joint point, movement of the anti-dazzling screen in the plane is only restrained by the first pivot joint point and the second pivot joint point, and the anti-dazzling screen is driven by the first driving mechanism and the second driving mechanism to selectively cut in and out of the light through hole. In the movement process of the anti-dazzling screen, the first pivoting point is driven by the first driving mechanism to move along the arc-shaped track, and when the first pivoting point is located at any position of the arc-shaped track, the second pivoting point is driven by the second driving mechanism to move around the first pivoting point along the arc-shaped track.

Description

Technical Field

[0001] The utility model relates to the technical field of stage lights, and more specifically, to a cutter and a stage light with the same. Background Art

[0002] Most stage lights on the market will add various fancy modules to enrich their functional effects. The cutter located inside the lamp intercepts and regulates the light beam, and uses multiple light-shielding sheets to cooperate with each other to block the light beam. Finally, the lamp projects light spots of various shapes such as triangles or polygons onto the target plane to enhance the stage effect and have visual impact.

[0003] Currently, among the existing types of stage light cutters, in addition to using a driving mechanism to drive the light-shielding sheet, it is also necessary to guide the light-shielding sheet. Generally, a sliding groove is provided on the spacer between the light-shielding sheets to cooperate with the guiding posts provided on the light-shielding sheet to achieve guiding. However, this will increase the resistance of the movement of the light-shielding sheet, and may cause jamming or require a motor with a larger power to drive it, which is not conducive to the miniaturization of the cutter. There is an urgent need for a more efficient and reliable stage light cutter so that it can balance performance, durability and maintainability in practical applications. Summary of the Utility Model

[0004] In order to overcome at least one of the above-mentioned defects of the prior art, the utility model provides a cutter and a stage light with the same, which drive the light-shielding sheet so that the light-shielding sheet can move precisely without additionally arranging a guiding component, and has sufficient flexibility to achieve cutting at more angles.

[0005] To solve the above technical problems, the technical solution adopted by the utility model is: including a substrate with a light-passing hole, a light-shielding sheet for blocking light, and a first driving mechanism and a second driving mechanism pivotally connected to the light-shielding sheet and driving it to move in a plane. The first driving mechanism is pivotally connected to the light-shielding sheet through a first pivot point, and the second driving mechanism is pivotally connected to the light-shielding sheet through a second pivot point. The movement of the light-shielding sheet in the plane is only restricted by the first pivot point and the second pivot point. The light-shielding sheet can selectively cut into and cut out the light-passing hole under the drive of the first driving mechanism and the second driving mechanism. During the movement of the light-shielding sheet, the first pivot point moves along an arc trajectory under the drive of the first driving mechanism. When the first pivot point is at any position on the arc trajectory, the second pivot point can move along an arc trajectory around the first pivot point under the drive of the second driving mechanism.

[0006] Driven by the first driving mechanism, the first pivot point of the light shielding sheet is moved along an arc trajectory to change the position of the light shielding sheet. At the same time, when the first pivot point is at any position on the arc trajectory, the second driving mechanism can be used to drive the first pivot point to move along the arc trajectory as well, changing the angle of the light shielding sheet. Of course, the first driving mechanism and the second driving mechanism can be driven synchronously to achieve the translation of the light shielding sheet. Based on the movement trajectory characteristics of the first pivot point and the second pivot point, the light shielding sheet has sufficient degrees of freedom to change to more angles to cut into the light passing hole. At the same time, with the mutual cooperation of the first driving mechanism and the second driving mechanism in this solution, the light shielding sheet can be driven to move in a plane, and there is no need to additionally set a limiting component to limit the movement of the light shielding sheet, effectively avoiding the jamming that may be caused by the guiding component, making the movement of the light shielding sheet smoother. At the same time, the structural damping is also reduced, thereby reducing the requirements for the power of the first driving mechanism and the first driving mechanism. Compared with the traditional cutter structure, the cutter in this solution is smaller in volume and lighter in weight, and due to the reduction of the driving structure, the difficulty of maintenance is effectively reduced.

[0007] Further, during the movement of the light shielding sheet, the movement trajectory of the first pivot point and / or when the first pivot point is at any position on the arc trajectory, the movement trajectory of the second pivot point around the first pivot point is circular arc-shaped. The circular arc-shaped trajectory facilitates the designer to calculate the movement of the light shielding sheet and is conducive to control.

[0008] Further, the light shielding sheet has only rotational degrees of freedom relative to the first pivot point and the second pivot point. That is, the light shielding sheet has no translational degrees of freedom relative to the first pivot point and the second pivot point. When the positions of the first pivot point and the second pivot point are determined, the position of the light shielding sheet is fixed and will not shake randomly. Canceling other redundant degrees of freedom simplifies the structure and more accurately controls the movement of the light shielding sheet.

[0009] Further, the first driving mechanism includes a first swing arm with one end fixed in position and pivotally connected. The first pivot point is the pivot connection between the other end of the first swing arm and the light shielding sheet. Using the single swing arm structure, the first swing arm can apply a force along the direction of approaching or moving away from the light passing hole to the light shielding sheet by swinging. Using a single swing arm can fix the relationship between the position of the first pivot point and the swing angle of the first swing arm. As long as the angle of the first swing arm is determined, the position of the first pivot point is determined, thereby achieving an absolute constraint on the first pivot point. There are fewer linkage relationships, and the calculation of the position of the first pivot point is simple and fast, which is more conducive to software operation control.

[0010] Further, the second driving mechanism includes a second swing arm and a third swing arm pivotally connected at one end. The second pivot point is the pivotal connection between the other end of the second swing arm and the light shielding sheet. The other end of the third swing arm is fixed in position and pivotally connected. The cooperation between the second swing arm and the third swing arm enables the second driving mechanism to apply a driving force to the light shielding sheet at multiple angles, adjust the position of the second pivot point, so that when the first pivot point is at any position on the arc-shaped trajectory, the second pivot point can move along another arc-shaped trajectory, facilitating a more flexible and precise conversion of the angle of entry into the light passing hole.

[0011] Further, the first driving mechanism includes a first swing arm pivotally connected at one end with a fixed position. The first pivot point is the pivotal connection between the other end of the first swing arm and the light shielding sheet. The length of the first swing arm is longer than the length of the third swing arm. In this way, when the first swing arm rotates by a small angle, a large displacement of the first pivot point can be achieved, so that the light shielding sheet can enter the light passing hole at more preset angles, and the area of the light shielding sheet is also reduced, resulting in lower costs.

[0012] Further, the length of the second swing arm is more than 1.5 times the length of the third swing arm. With such a setting, the shorter third swing arm can make the movement range of the second driving mechanism smaller, and the power requirement for the second driving mechanism is lower, and the control of the light shielding sheet is also more precise.

[0013] Further, the substrate is provided with a second limit post. The second driving mechanism is respectively provided with a first limit portion and a second limit portion corresponding to the second limit post. When the light shielding sheet completely cuts out of the light passing hole, the first limit portion abuts against the second limit post; when the light shielding sheet cuts into and completely shields the light passing hole, the second limit portion abuts against the second limit post. The second limit post is utilized with multiple functions, reducing the limit structure and further streamlining the structure of the cutter.

[0014] Further, when the light shielding sheet completely cuts out of the light passing hole, the first pivot point has a first extreme position; when the light shielding sheet cuts into and completely shields the light passing hole, the first pivot point has a second extreme position. The distance between the first extreme position and the second extreme position is greater than or equal to the diameter of the light passing hole. With such a setting, the light passing hole can be completely shielded by a single light shielding sheet, and then the light passing hole can be cut into more shapes, further enriching the effect of the cutter.

[0015] Furthermore, the number of the shading sheets is 4, and the shading sheets are arranged around the light hole and arranged in sequence along a direction perpendicular to the substrate. The shading sheets move in different planes respectively, and the shading sheets can be combined into a richer variety of patterns by partially overlapping each other.

[0016] Furthermore, a baffle is provided between the adjacent light shielding sheets in a direction perpendicular to the substrate, and the baffle is provided with a light-transmitting hole corresponding to the light-through hole, and the diameter of the light-transmitting hole is greater than or equal to the diameter of the light-through hole. The baffle can restrict the adjacent light shielding sheets in a direction perpendicular to the substrate to move in different planes, so as to avoid the edges of the two sheets from colliding with each other during movement, causing a jam or even failure to close, thereby ensuring the normal operation of the cutter, and the diameter of the light-transmitting hole is greater than or equal to the diameter of the light-through hole, so as to reduce the reflection of the baffle.

[0017] Furthermore, during the movement of the two adjacent shading sheets in the direction perpendicular to the substrate, they always keep at least a part of each other in the direction perpendicular to the substrate. In this way, even if there is no barrier sheet between the two adjacent shading sheets, it is still possible to avoid the two sheets from conflicting with each other during the movement, causing a jam or even failure to close, thereby saving components and simplifying the structure of the cutter.

[0018] Furthermore, the first driving mechanism includes a first motor providing driving force, and the second driving mechanism includes a second motor providing driving force, the shading sheet is arranged on one side of the substrate, and the first motor and / or the second motor are arranged on the other side of the substrate. The reasonable distribution of the first driving mechanism and / or the second driving mechanism and the shading sheet can effectively reduce the overall volume of the cutter, and the overall structure is more compact.

[0019] The utility model also provides a stage lamp, comprising a light source located in a lamp head and generating a light beam, and a lens assembly for changing the divergence angle of the light beam, wherein a cutter as described in any of the above items is also installed inside the lamp head, and the cutter is arranged close to the focus of the light beam, and the light beam emitted by the light source is cut by the cutter and then projected from the lens assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the exploded structure of the cutter of the utility model.

[0021] Figure 2 It is a schematic diagram of the assembly structure of the cutter of the utility model.

[0022] Figure 3 It is a three-dimensional structural schematic diagram of the cutter of the utility model.

[0023] Figure 4 It is a three-dimensional structural schematic diagram of another perspective of the cutter described in the present utility model.

[0024] Figure 5 It is a structural schematic diagram of a stage light with the cutter in the present utility model.

[0025] In the figure:

[0026] 100, substrate; 110, light passing hole; 120, light shielding sheet; 130, first limiting post; 140, second limiting post; 150, partition sheet; 151, light transmitting hole; 160, top plate; 170, bottom plate; 200, first driving mechanism; 210, first pivot point; 220, first swing arm; 230, first motor; 300, second driving mechanism; 310, second pivot point; 320, second swing arm; 330, third swing arm; 331, first limiting portion; 332, second limiting portion; 340, second motor; 400, lamp head; 500, light source; 600, lens assembly; 700, support arm; 800, chassis. Detailed implementation manners

[0027] As Figures 1 to 4 shown, it includes a substrate 100 having a light passing hole 110, a light shielding sheet 120 for blocking light, and a first driving mechanism 200 and a second driving mechanism 300 pivotally connected to the light shielding sheet 120 and driving it to move in a plane. The first driving mechanism 200 is pivotally connected to the light shielding sheet 120 through a first pivot point 210, and the second driving mechanism 300 is pivotally connected to the light shielding sheet 120 through a second pivot point 310. The movement of the light shielding sheet 120 in the plane is only restricted by the first pivot point 210 and the second pivot point 310. The light shielding sheet 120 can selectively cut into and cut out of the light passing hole 110 under the drive of the first driving mechanism 200 and the second driving mechanism 300. During the movement of the light shielding sheet 120, the first pivot point 210 moves along an arc trajectory under the drive of the first driving mechanism 200. When the first pivot point 210 is at any position of the arc trajectory, the second pivot point 310 can move along an arc trajectory around the first pivot point 210 under the drive of the second driving mechanism 300.

[0028] Driven by the first driving mechanism 200, the first pivot point 210 of the light-shielding sheet 120 is moved along an arc trajectory to change the position of the light-shielding sheet 120. At the same time, when the first pivot point 210 is at any position on the arc trajectory, the second driving mechanism 300 can be used to drive the first pivot point 210 to move along the arc trajectory as well, so as to change the angle of the light-shielding sheet 120. Of course, the first driving mechanism 200 and the second driving mechanism 300 can be driven synchronously to achieve the translation of the light-shielding sheet 120. Based on the movement trajectory characteristics of the first pivot point 210 and the second pivot point 310, the light-shielding sheet 120 has sufficient degrees of freedom to cut into the light-transmitting hole 110 at more angles. At the same time, with the mutual cooperation of the first driving mechanism 200 and the second driving mechanism 300 in this solution, the light-shielding sheet 120 can be driven to move in a plane, and there is no need to additionally set a limiting component to limit the movement of the light-shielding sheet 120, effectively avoiding the jamming that may be caused by the guiding component, making the movement of the light-shielding sheet 120 smoother, and at the same time reducing the structural damping, thereby reducing the requirements for the power of the first driving mechanism 200 and the first driving mechanism 200; compared with the traditional cutter structure, the cutter in this solution is smaller in volume and lighter in weight, and due to the reduction of the driving structure, the difficulty of maintenance is effectively reduced.

[0029] Preferably, it further includes a third driving mechanism for driving the substrate 100 to rotate; the substrate 100 is circular. When the light-shielding sheet 120 cuts into the light-transmitting hole 110, by rotating the substrate 100, the dynamic effect is increased.

[0030] Preferably, the light-transmitting hole 110 can be formed by integral molding of the substrate 100 or located on a sheet metal part connected to the substrate 100. In this embodiment, the cutter further includes a top plate 160 and a bottom plate 170. The top plate 160 is located on the side of the bottom plate 170 away from the substrate 100. The light-shielding sheet 120 is located between the top plate 160 and the bottom plate 170. The light-transmitting hole 110 is located on the top plate 160, and the surface of the light-transmitting hole 110 is subjected to an anti-glare treatment.

[0031] Preferably, the surface of the light-shielding sheet 120 is subjected to anti-radiation treatment, such as by spraying matte paint, coating, etc.

[0032] In a preferred embodiment of the present invention, during the movement of the light-shielding sheet 120, the movement trajectory of the first pivot point 210 and / or when the first pivot point 210 is at any position on the arc trajectory, the movement trajectory of the second pivot point 310 around the first pivot point 210 is circular. The circular trajectory is convenient for the designer to calculate the movement of the light-shielding sheet 120 and is conducive to operation.

[0033] In a preferred embodiment of the present utility model, the light shielding sheet 120 has only a rotational degree of freedom with respect to both the first pivot point 210 and the second pivot point 310. That is, the light shielding sheet 120 has no translational degree of freedom with respect to the first pivot point 210 and the second pivot point 310. When the positions of the first pivot point 210 and the second pivot point 310 are determined, the position of the light shielding sheet 120 is fixed and will not shake randomly. Other redundant degrees of freedom are cancelled, the structure is simplified, and the movement of the light shielding sheet 120 can be controlled more precisely.

[0034] In a preferred embodiment of the present utility model, the first driving mechanism 200 includes a first swing arm 220 with one end fixed in position and pivotally connected. The first pivot point 210 is the pivot connection between the other end of the first swing arm 220 and the light shielding sheet 120. Using a single swing arm structure, the first swing arm 220 can apply a force to the light shielding sheet 120 in a direction close to or away from the light transmission hole 110 by swinging. Using a single swing arm, the relationship between the position of the first pivot point 210 and the swing angle of the first swing arm 220 can be fixed. As long as the angle of the first swing arm 220 is determined, the position of the first pivot point 210 is determined, thereby achieving absolute constraint on the first pivot point 210, with fewer linkage relationships. The position calculation of the first pivot point 210 is simple and fast, which is more conducive to software operation control.

[0035] Preferably, the substrate 100 is provided with at least two first limit posts 130 that limit the swing range of the first swing arm 220.

[0036] In a preferred embodiment of the present utility model, the second driving mechanism 300 includes a second swing arm 320 and a third swing arm 330 pivotally connected at one end. The second pivot point 310 is the pivot connection between the other end of the second swing arm 320 and the light shielding sheet 120, and the other end of the third swing arm 330 is fixed in position and pivotally connected. The mutual cooperation of the second swing arm 320 and the third swing arm 330 enables the second driving mechanism 300 to apply a driving force to the light shielding sheet 120 at multiple angles, adjust the position of the second pivot point 310, so that when the first pivot point 210 is at any position on an arc trajectory, the second pivot point 310 can move along another arc trajectory, facilitating a more flexible and precise conversion of the angle of entry into the light transmission hole 110.

[0037] Preferably, the pivot point of the second swing arm 320 and the third swing arm 330 is always located on the side of the pivot point at the other end of the third swing arm 330 away from the first pivot point 210.

[0038] In a preferred embodiment of the present utility model, the first driving mechanism 200 includes a first swing arm 220 with one end fixed in position and pivotally connected. The first pivot point 210 is the pivot connection between the other end of the first swing arm 220 and the light-shielding sheet 120. The length of the first swing arm 220 is longer than that of the third swing arm 330. In this way, when the first swing arm 220 rotates by a small angle, a large displacement of the first pivot point 210 can be achieved, so that the light-shielding sheet 120 can cut into the light-passing hole 110 at more preset angles, and the area of the light-shielding sheet 120 is also reduced, resulting in lower costs.

[0039] In a preferred embodiment of the present utility model, the length of the second swing arm 320 is more than 1.5 times that of the third swing arm 330. With such a setting, the shorter third swing arm 330 can make the movement range of the second driving mechanism 300 smaller, require a lower power for the second driving mechanism 300, and also make the control of the light-shielding sheet 120 more precise.

[0040] In a preferred embodiment of the present utility model, the substrate 100 is provided with a second limit post 140. The second driving mechanism 300 is respectively provided with a first limit portion 331 and a second limit portion 332 corresponding to the second limit post 140. When the light-shielding sheet 120 completely cuts out of the light-passing hole 110, the first limit portion 331 abuts against the second limit post 140; when the light-shielding sheet 120 cuts into and completely shields the light-passing hole 110, the second limit portion 332 abuts against the second limit post 140. The second limit post 140 is utilized in multiple functions to reduce the limit structure and further streamline the structure of the cutter.

[0041] Preferably, both the first limit portion 331 and the second limit portion 332 are provided on the third swing arm 330.

[0042] In a preferred embodiment of the present utility model, when the light-shielding sheet 120 completely cuts out of the light-passing hole 110, the first pivot point 210 has a first limit position; when the light-shielding sheet 120 cuts into and completely shields the light-passing hole 110, the first pivot point 210 has a second limit position, and the distance between the first limit position and the second limit position is greater than or equal to the diameter of the light-passing hole 110. With such a setting, the light-passing hole 110 can be completely shielded by a single light-shielding sheet 120, and then the light-passing hole 110 can be cut into more shapes, further enriching the effect of the cutter.

[0043] In a preferred embodiment of the present utility model, the number of the light-shielding sheets 120 is four. The four light-shielding sheets 120 are arranged around the light-passing hole 110 and are arranged in sequence along a direction perpendicular to the substrate 100. The four light-shielding sheets 120 move in different planes respectively, and the light-shielding sheets 120 can be combined into a more diverse pattern by partial overlapping.

[0044] Preferably, among the four light-shielding sheets 120, two are arranged opposite to each other and the arrangement directions are perpendicular to each other. Each pair of the light-shielding sheets 120 can move towards each other along a direction away from or close to the light-passing hole 110.

[0045] Preferably, the number of the first driving mechanisms 200 and the second driving mechanisms 300 is four respectively, and the distances between the first pivot points 210 and the second pivot points 310 to which the light-shielding sheets 120 are pivotally connected are the same.

[0046] Preferably, along the direction around the light-passing hole 110, the first pivot points 210 of two adjacent light-shielding sheets 120 are arranged adjacent to each other, or the second pivot points 310 of two adjacent light-shielding sheets 120 are arranged adjacent to each other.

[0047] In a preferred embodiment of the present utility model, a partition sheet 150 is arranged between the light-shielding sheets 120 adjacent to each other along a direction perpendicular to the substrate 100. The partition sheet 150 is provided with a light-transmitting hole 151 corresponding to the light-passing hole 110, and the diameter of the light-transmitting hole 151 is greater than or equal to the diameter of the light-passing hole 110. The partition sheet 150 can limit the light-shielding sheets 120 adjacent to each other along a direction perpendicular to the substrate 100 to move in different planes, avoiding the situation that the edges of the two touch each other during movement, resulting in jamming or even inability to close, ensuring the normal operation of the cutter. Moreover, the diameter of the light-transmitting hole 151 being greater than or equal to the diameter of the light-passing hole 110 can reduce the reflection of the partition sheet 150.

[0048] In other embodiments of the present utility model, a partition sheet 150 is arranged between adjacent light-shielding sheets 120.

[0049] In other embodiments of the present utility model, partition sheets 150 are also arranged above the topmost light-shielding sheet 120 and below the bottommost light-shielding sheet 120.

[0050] In a preferred embodiment of the present utility model, during the movement of two adjacent light-shielding sheets 120 along a direction perpendicular to the substrate 100, at least a part of them always remains overlapped in the direction perpendicular to the substrate 100. In this way, even if no partition sheet 150 is provided between two adjacent light-shielding sheets 120, it is still possible to avoid the situation that they conflict with each other during movement, resulting in jamming or even inability to close, saving components and streamlining the structure of the cutter.

[0051] In a preferred embodiment of the present utility model, the first driving mechanism 200 includes a first motor 230 that provides driving force, and the second driving mechanism 300 includes a second motor 340 that provides driving force. The light-shielding sheet 120 is disposed on one side surface of the substrate 100, and the first motor 230 and / or the second motor 340 is disposed on the other side surface of the substrate 100. The reasonable distribution of the first driving mechanism 200 and / or the second driving mechanism 300 and the light-shielding sheet 120 can effectively reduce the overall volume of the cutter, and the overall structure is more compact.

[0052] As Figure 1 and Figure 5 As shown, in another embodiment of the present utility model, a stage light is further provided, which includes a light source 500 located in the lamp head 400 and generating a light beam, and a lens assembly 600 for changing the divergence angle of the light beam. The cutter described in any one of the foregoing is further installed inside the lamp head 400. The cutter is disposed close to the focus of the light beam. After the light beam emitted by the light source 500 is cut by the cutter, it is projected from the lens assembly 600. The cutter in this solution has a smaller volume and lighter weight. Applying it to the stage light greatly saves the installation space inside the lamp head 400, is beneficial to heat dissipation. At the same time, the overall weight of the stage light is reduced, which better meets the requirements of the lightweight development of the stage light.

[0053] Preferably, the light-shielding sheet 120 is disposed on the side of the substrate 100 close to the light source 500.

[0054] Preferably, the cutter further includes a light gate assembly located between the light-shielding sheet 120 and the substrate 100 and used for changing the diameter of the light passing hole 110. The light gate assembly is connected to the side surface of the frame plate close to the light-shielding sheet 120. The surface of the light gate is subjected to an anti-reflection treatment to prevent the formation of stray light and avoid the situation that stray light enters the lens assembly 600 and then affects the light output effect of the stage light.

[0055] Preferably, it further includes a support arm 700 for pivotally connecting the lamp holder 400 and a chassis 800 for supporting the rotation of the support arm 700. The support arm 700 is pivotally connected above the chassis 800, and the lamp holder 400 can rotate relative to the chassis 800 around at least two dimensions, so that the light spot projected by the lamp holder 400 can be projected at multiple angles.

[0056] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A cutter, characterized in that, It includes a substrate (100) having a light-transmitting hole (110), a light-shielding sheet (120) for blocking light, and a first driving mechanism (200) and a second driving mechanism (300) pivotally connected to the light-shielding sheet (120) and driving it to move in a plane. The first driving mechanism (200) is pivotally connected to the light-shielding sheet (120) through a first pivot point (210), and the second driving mechanism (300) is pivotally connected to the light-shielding sheet (120) through a second pivot point (310). The movement of the light-shielding sheet (120) in the plane is only restricted by the first pivot point (210) and the second pivot point (310). The light-shielding sheet (120) can selectively cut into and out of the light-transmitting hole (110) under the drive of the first driving mechanism (200) and the second driving mechanism (300). During the movement of the light-shielding sheet (120), the first pivot point (210) moves along an arc-shaped trajectory under the drive of the first driving mechanism (200). When the first pivot point (210) is at any position on the arc-shaped trajectory, the second pivot point (310) can move along an arc-shaped trajectory around the first pivot point (210) under the drive of the second driving mechanism (300).

2. The cutter according to claim 1, characterized in that, During the movement of the light-shielding sheet (120), the movement trajectory of the first pivot point (210) and / or when the first pivot point (210) is at any position on the arc-shaped trajectory, the movement trajectory of the second pivot point (310) around the first pivot point (210) is arc-shaped.

3. The cutter according to claim 1, characterized in that, The light-shielding sheet (120) has only a rotational degree of freedom relative to both the first pivot point (210) and the second pivot point (310).

4. The cutter according to claim 1, characterized in that, The first driving mechanism (200) includes a first swing arm (220) with one end fixed and pivotally connected. The first pivot point (210) is the pivot connection between the other end of the first swing arm (220) and the light-shielding sheet (120).

5. The cutter according to claim 1, wherein The second driving mechanism (300) includes a second swing arm (320) and a third swing arm (330) pivotally connected to each other at one end. The second pivot point (310) is the pivot connection between the other end of the second swing arm (320) and the light-shielding sheet (120). The other end of the third swing arm (330) is fixed and pivotally connected.

6. The cutter according to claim 5, characterized in that The first driving mechanism (200) includes a first swing arm (220) with one end fixed and pivotally connected. The first pivot point (210) is the pivot connection between the other end of the first swing arm (220) and the light-shielding sheet (120). The length of the first swing arm (220) is longer than the length of the third swing arm (330).

7. The cutter according to claim 5, wherein The length of the second swing arm (320) is more than 1.5 times the length of the third swing arm (330).

8. The cutter according to claim 1 or 5, characterized in that, The substrate (100) is provided with second limit posts (140), and the second driving mechanism (300) is respectively provided with a first limit portion (331) and a second limit portion (332) corresponding to the second limit posts (140). When the light-shielding sheet (120) completely cuts out the light-transmitting hole (110), the first limit portion (331) abuts against the second limit post (140); when the light-shielding sheet (120) cuts into and completely shields the light-transmitting hole (110), the second limit portion (332) abuts against the second limit post (140).

9. The cutter according to claim 1 or 4, characterized in that When the light-shielding sheet (120) completely cuts out the light-transmitting hole (110), the first pivot point (210) has a first limit position; when the light-shielding sheet (120) cuts into and completely shields the light-transmitting hole (110), the first pivot point (210) has a second limit position, and the distance between the first limit position and the second limit position is greater than or equal to the diameter of the light-transmitting hole (110).

10. The cutter according to claim 1, characterized in that, The number of the light-shielding sheets (120) is four, and the four light-shielding sheets (120) are arranged around the light-transmitting hole (110) and are arranged in sequence along the direction perpendicular to the substrate (100).

11. The cutter according to claim 10, characterized in that, A partition sheet (150) is arranged between adjacent light-shielding sheets (120) along the direction perpendicular to the substrate (100). The partition sheet (150) is provided with a light-transmitting hole (151) corresponding to the light-transmitting hole (110), and the diameter of the light-transmitting hole (151) is greater than or equal to the diameter of the light-transmitting hole (110).

12. The cutter according to claim 11, characterized in that, During the movement of two adjacent light-shielding sheets (120) along the direction perpendicular to the substrate (100), at least part of them always overlaps along the direction perpendicular to the substrate (100).

13. The cutter according to claim 1, wherein, The first driving mechanism (200) includes a first motor (230) providing driving force, and the second driving mechanism (300) includes a second motor (340) providing driving force. The light-shielding sheet (120) is arranged on one side surface of the substrate (100), and the first motor (230) and / or the second motor (340) is arranged on the other side surface of the substrate (100).

14. A stage light, comprising a light source (500) located within a lamp head (400) and generating a light beam, and a lens assembly (600) for changing a divergence angle of the light beam, characterized in that, The lamp head (400) further installs any one of the cutters according to claims 1 to 13 therein. The cutter is arranged close to the focus of the light beam. After the light beam emitted by the light source (500) is cut by the cutter, it is projected from the lens assembly (600).

Images