Cutter with arc-shaped guiding function and stage lamp

Abstract

The cutter comprises a white wafer and at least one pair of oppositely-arranged cutting blades, the white wafer is provided with a light through hole allowing light beams to penetrate through, the two ends, away from one side, of each pair of cutting blades are each connected with a two-connecting-rod, each two-connecting-rod comprises a first rod body and a second rod body, and the first rod bodies and the second rod bodies are connected in a pivoted mode. One end of the first rod body is hinged to the cutting blade, the other end of the second rod body is hinged to the cutting blade, the other end of the second rod body is driven by a driving mechanism to rotate, the guiding piece is used for limiting a guiding point on the cutting blade to move along an arc-shaped track on the plane where the guiding point is located, the driving mechanism is fixed to the base plate, and the base plate drives all the cutting blades to rotate integrally. The guide points are arranged on the cutting blades, and the cutting blades move along the arc-shaped tracks, so that the cutting blades can generate certain displacement along the direction perpendicular to the arrangement direction of the cutting blades under the guide of the guide points, the light beam intercepting area of the cutting blades can be changed more quickly, and long-term concentration of heat is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of cutters, and more particularly to a cutter with an arc guide and a stage light. Background Art

[0002] As a commonly used performance equipment, stage lights have higher and higher requirements for brightness, so the power of the light source is increasing day by day. As the cutter inside the lamp cuts the light beam, its actual principle is to use the cutting blade to block the light beam, so that the light beam presents various shapes. As the energy of the light beam is getting higher and higher, the cutting blade absorbs more and more heat when blocking the light beam, which is easy to cause thermal deformation of itself and affect the imaging effect of the light spot. Summary of the invention

[0003] In order to overcome at least one of the defects of the prior art described above, the present invention provides a cutter with an arc guide, which can quickly replace different areas of the cutting blade to intercept the light beam and avoid excessive local heat absorption of the cutting blade.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a cutter with an arc-shaped guide, comprising a white round piece with a light-through hole for a light beam to pass through, at least one pair of cutting pieces arranged opposite to each other, each pair of the cutting pieces having a cutting edge for cutting the light beam on the side close to each other, and two ends on the side far away from each other are respectively connected to a two-link rod, the two-link rod comprising a first rod body and a second rod body pivotally connected to each other, the other end of the first rod body being hinged to the cutting piece, the other end of the second rod body being driven to rotate by a driving mechanism, and also comprising a guide member for limiting the movement of a guide point on the cutting piece along an arc-shaped trajectory in its plane, and a rotatable base plate, the driving mechanism being fixed to the base plate, and the base plate driving all the cutting pieces to rotate as a whole.

[0005] The cutter with arc guide sets a guide point on the cutting blade and makes it move along an arc track. In this way, when a pair of cutting blades move toward or away from each other, the cutting blades, under the guidance of the guide point, will simultaneously produce a certain displacement in a direction perpendicular to the arrangement direction of the pair of cutting blades, so that the area where the cutting blade intercepts the light beam changes faster, avoiding long-term concentration of heat, resulting in thermal deformation of the cutting edge, affecting the imaging effect of the light spot or direct damage.

[0006] Furthermore, the arc track is in the shape of a circular arc, so that the guide member can define the arc track with a simple structure.

[0007] Furthermore, the center of the arc track and the center of the light-through hole are located on both sides of the arc track, respectively, so as to reduce mutual interference of other moving elements during the movement of the cutting blade.

[0008] Furthermore, the guide member is a guide rod, one end of which is hinged to the guide point and the other end is pivotally fixed. That is, the end of the guide rod hinged to the guide point moves along an arc around the other end with its own length as the radius, and the trajectory of the movement is the arc trajectory. By using the guide rod to guide the guide point, jamming can be effectively reduced.

[0009] Furthermore, the length of the second rod is smaller than the distance between the driving shaft of the driving mechanism and the center of the arc track, so as to prevent the second rod from touching the pivoting column of the pivoting fixed end of the guide rod corresponding to the adjacent cutting blade during rotation.

[0010] Furthermore, the guide point is a hinge point between the cutting blade and one of the first rods. Directly using the hinge point between the cutting blade and one of the first rods as the guide point can not only utilize the existing structure, but also avoid mutual interference between the guide point and other components, or other components make way for the movement space of the guide point.

[0011] Furthermore, the chord length of the arc track in the arrangement direction of the corresponding pair of the cutting blades is greater than the aperture of the light-through hole. That is, the arc track allows the cutting blade to move from a position that fully opens the light-through hole to a position that fully covers the light-through hole under the cooperation of the two connecting rods, so as to produce different shading effects.

[0012] Furthermore, the radius of the arc track is greater than 1 / 2 of the maximum distance between the two ends of the two connecting rods, so as to ensure that the chord height of the arc track with the same chord length is not too large, and to avoid the range of movement of the guide point occupying too much space.

[0013] Furthermore, the chord height of the arc track in a direction perpendicular to the arrangement direction of the corresponding pair of cutting blades is less than 1 cm, which allows the cutting blade to have a certain displacement in a direction perpendicular to the arrangement direction of the pair of cutting blades, thereby playing a role in quickly changing the area where the cutting blade intercepts the light beam, while avoiding interference with other components due to its excessive displacement range.

[0014] Furthermore, the length of the second rod is greater than 1 / 2 of the diameter of the light-through hole and less than the diameter of the light-through hole. In this way, when the hinge point of the second rod and the first rod rotates from the position farthest from the light-through hole to the position closest to the light-through hole, with the cooperation of the other two connecting rods, the cutting blade can move from a position that fully opens the light-through hole to a position that completely covers the light-through hole, so as to produce different shading effects, and at the same time, the second rod will not be too long and occupy too much space for movement.

[0015] Furthermore, in the process of the guide point moving along the arc track, when it is in the middle position of the arc track, the position of the cutting blade deviates the farthest from the center of the light hole in the direction perpendicular to the arrangement direction of the corresponding pair of cutting blades. In this way, in the process of the guide point moving from one end of the arc track to the other end, the cutting blade will reciprocate in the direction perpendicular to the arrangement direction of the pair of cutting blades, constantly changing the area where the cutting blade intercepts the light beam, and will not occupy too much activity space.

[0016] Furthermore, the first rod body has an avoidance curve for avoiding the driving shaft of the driving mechanism. The avoidance curve increases the activity range of the first rod body, thereby making the activity range of the cutting blade larger.

[0017] Furthermore, the distance between the two ends of the cutting sheet and the hinge point of the first rod body is greater than or equal to the diameter of the light hole. times, which is less than or equal to 2 times the diameter of the light-through hole. Thus, the cutting blade can close the light-through hole in a direction of 30° to 45° relative to the arrangement direction of the corresponding pair of cutting blades.

[0018] Furthermore, a separator is included for limiting the movement of the cutting blade in a direction perpendicular to the plane in which it is located, and the separator has a hollow hole for the light beam to pass through. During the movement of the cutting blade, the side of the cutting blade adjacent to the cutting edge is always located outside the hollow hole. In this way, it is not easy for the cutting blade to be blocked with the hollow hole, and the side of the cutting blade adjacent to the cutting edge will not enter the hollow hole for imaging, thereby avoiding affecting the light effect.

[0019] Furthermore, the second rod body is limited to its maximum forward rotation angle and maximum reverse rotation angle by only one limiting column. The second rod body can rotate both forward and reverse, so that the process of the cutting blade cutting in / out of the limit angle is smooth and fast, and the number of limiting columns can be reduced, thereby reducing costs.

[0020] Furthermore, the guide member is a guide plate having an arc-shaped guide groove, and the guide point moves along the guide groove. Directly using the guide groove to guide the guide point to move in an arc shape can make the structure of the guide member simple, and the route of the arc track can be more varied.

[0021] Furthermore, it comprises two pairs of cutting blades, and the arrangement directions of the two pairs of cutting blades are perpendicular to each other. The four cutting blades cooperate with each other to jointly cut the light beam, so that the light beam produces light spots of various shapes.

[0022] Furthermore, the guide points of two adjacent cutting blades are located on the side close to or far away from each other, leaving a completely free space for the installation of other components.

[0023] Furthermore, a shaft sleeve is detachably fixed on the driving shaft of the driving mechanism, and the ends of the two connecting rods are connected to the shaft sleeve. The height of the two connecting rods and the cutting blade can be adjusted by replacing the shaft sleeves of different heights, which is conducive to the standardization of components.

[0024] The present invention also provides a stage light, comprising a lamp head, wherein a light source and a cutter according to any one of claims 1 to 19 are arranged in the lamp head, and the light emitted by the light source passes through the light hole of the cutter and then is emitted from the light outlet of the lamp head. The cutter can be used to cut the light beam emitted by the light source into different shapes for projection, thereby generating a variety of light effects.

[0025] Furthermore, the lamp head is also provided with an effect component for interfering the light beam to produce a light effect, a focusing component for adjusting the focus of the light beam, and / or an amplifying component for adjusting the divergence angle of the light beam. The effect component can interfere with the light beam to produce a rich light effect, the focusing component can adjust the clarity of the light spot, and the amplifying component can adjust the size of the light spot.

[0026] Furthermore, it also includes a support arm for supporting the rotation of the lamp head and a chassis for supporting the rotation of the support arm. Through the rotation of the lamp head and the support arm, the light beam emitted by the lamp head can be projected in any direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the cutter with arc guide of the present invention.

[0028] Figure 2 It is a schematic diagram of the cutting blade driving structure of the present invention.

[0029] Figure 3 It is a schematic diagram of the cutting blade driving structure of the present invention from another perspective.

[0030] Figure 4 It is a schematic diagram of the exploded structure of the stage light of the present invention.

[0031] In the figure: 100, white round piece; 110, light hole; 200, cutting piece; 210, cutting edge; 220, guide point; 300, second connecting rod; 310, first rod body; 311, avoidance bend; 320, second rod body; 321, limit column; 400, driving mechanism; 410, driving shaft; 420, bushing; 510, guide rod; 511, pivot column; 600, separator; 610, hollow hole; 700, substrate; 800, lamp holder; 810, light source; 820, light outlet; 830, focusing assembly; 840, magnifying assembly; 850, CMY assembly; 860, pattern plate assembly; 900, support arm; 910, chassis. DETAILED DESCRIPTION

[0032] The drawings are only for illustrative purposes and cannot be construed as limiting the present invention. To better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are only for illustrative purposes and cannot be construed as limiting the present invention.

[0033] like Figures 1 to 3 The present invention provides a cutter with an arc guide, comprising a white round sheet 100 having a light hole 110 for a light beam to pass through, at least one pair of cutting sheets 200 arranged opposite to each other, each pair of the cutting sheets 200 having a cutting edge 210 for cutting the light beam on a side close to each other, and two ends on a side away from each other are respectively connected to a two-link rod 300, the two-link rod 300 comprising a first rod body 310 and a second rod body 320 pivotally connected to each other, the other end of the first rod body 310 is hinged to the cutting sheet 200, the other end of the second rod body 320 is driven to rotate by a driving mechanism 400, and also comprising a guide member for limiting the movement of the guide point 220 on the cutting sheet 200 along an arc trajectory in the plane where it is located, and a rotatable base plate 700, the driving mechanism 400 is fixed to the base plate 700, and the base plate 700 drives all the cutting sheets 200 to rotate as a whole.

[0034] The cutter with arc-shaped guide sets a guide point 220 on the cutting blade 200 and makes it move along an arc-shaped trajectory. In this way, when a pair of cutting blades 200 move toward or away from each other, the cutting blades 200, under the guidance of the guide point 220, will simultaneously produce a certain displacement in a direction perpendicular to the arrangement direction of the pair of cutting blades 200, so that the area where the cutting blade 200 intercepts the light beam changes faster, avoiding long-term concentration of heat, resulting in thermal deformation of the cutting edge 210, affecting the imaging effect of the light spot or direct damage.

[0035] It should be noted that the hinge point where the first rod body 310 is hinged to the cutting blade 200 is fixed relative to the cutting blade 200 and will not be displaced relative to the cutting blade 200 .

[0036] The other end of the second rod 320 is driven to rotate by the driving mechanism 400, so that the end connected to the first rod 310 swings, thereby driving the end of the first rod 310 connected to it to move along an arc with the end of the second rod 320 connected to the driving mechanism 400 as the center and the length of the second rod 320 as the radius. Under the guidance of the guide member to the guide point 220, each specific rotation angle of the two second rods 320 corresponding to the same cutting blade 200 corresponds to a unique position of the cutting blade 200.

[0037] Preferably, each pair of cutting blades 200 are located in different planes.

[0038] In this embodiment, the cutting edge 210 is a straight edge.

[0039] In this embodiment, connecting pieces protrude from both ends of each pair of the cutting pieces 200 on a side away from each other, and are used for being hinged to the first rod body 310 .

[0040] In a preferred embodiment of the present invention, the arc-shaped trajectory is in the shape of a circular arc, so that the guide member can define the arc-shaped trajectory with a simple structure.

[0041] The center angle corresponding to the arc trajectory is less than 45°, preferably less than 35°, and more preferably less than 20°. In the present embodiment, the center angle corresponding to the arc trajectory is less than 15°.

[0042] In a preferred embodiment of the present invention, the center of the arc track and the center of the light hole 110 are located on both sides of the arc track, respectively, to reduce the mutual interference of other moving elements during the movement of the cutting blade 200. That is, the center of the light hole 110 is located outside the area defined by the circle corresponding to the arc track.

[0043] In a preferred embodiment of the present invention, the guide member is a guide rod 510, one end of the guide rod 510 is hinged to the guide point 220, and the other end is pivotally fixed. The guide rod 510 is used to guide the guide point 220, which can effectively reduce jamming.

[0044] The guide rod 510 may be in any shape, but is preferably in a straight line.

[0045] It should be noted that after the other end of the guide rod 510 is pivotally fixed, the end of the guide rod 510 hinged to the guide point 220 can move along an arc with its pivotal fixing point as the center and the length of the second rod body 320 as the radius, and the trajectory of movement is the arc trajectory, wherein the length of the second rod body 320 refers to the distance between its pivotal fixing point and the guide point 220.

[0046] In a preferred embodiment of the present invention, the length of the second rod 320 is less than the distance between the driving shaft 410 of the driving mechanism 400 and the center of the arc track. The length of the second rod 320 refers to the distance between the hinge point between the second rod 320 and the first rod 310 and the driving shaft 410 of the driving mechanism 400. The center of the arc track is the pivot point of the guide rod 510. The length of the second rod 320 is less than the distance between the driving shaft 410 of the driving mechanism 400 and the center of the arc track, which can prevent the second rod 320 from touching the pivot column 511 of the pivot fixed end of the guide rod 510 corresponding to the adjacent cutting blade 200 during rotation.

[0047] Optionally, the guide point 220 may be any position on the cutting blade 200. In a preferred embodiment of the present invention, the guide point 220 is a hinge point between the cutting blade 200 and one of the first rods 310. Directly using the hinge point between the cutting blade 200 and one of the first rods 310 as the guide point 220 can not only utilize the existing structure, but also avoid mutual interference between the guide point 220 and other components, or other components make way for the movement space of the guide point 220.

[0048] In this embodiment, the guide point 220 is a column with expanded ends. The column passes through the cutting blade 200, the first rod body 310 and the guide rod 510. The expanded parts at both ends can prevent falling off.

[0049] In a preferred embodiment of the present invention, the chord length of the arc track in the arrangement direction of the corresponding pair of cutting blades 200 is greater than the aperture of the light-through hole 110. That is, the arc track allows the cutting blade 200 to move from a position that fully opens the light-through hole 110 to a position that fully covers the light-through hole 110 under the cooperation of the two connecting rods 300, so as to produce different light-shielding effects.

[0050] In this embodiment, the chord length of the arc track in the arrangement direction of the corresponding pair of cutting blades 200 is less than 1.2 times the aperture of the light-through hole 110 .

[0051] In a preferred embodiment of the present invention, the radius of the arc track is greater than 1 / 2 of the maximum distance between the two ends of the second connecting rod 300, so as to ensure that the chord height of the arc track with the same chord length is not too large, and to prevent the range of movement of the guide point 220 from occupying too much space.

[0052] In this embodiment, the radius of the arc track is less than 1.5 times the maximum distance between the two ends of the two connecting rods 300.

[0053] In a preferred embodiment of the present invention, the chord height of the arc track in a direction perpendicular to the arrangement direction of the corresponding pair of cutting blades 200 is less than 1 cm. This allows the cutting blade 200 to be displaced to a certain extent in a direction perpendicular to the arrangement direction of the pair of cutting blades 200, thereby quickly changing the area where the cutting blade 200 intercepts the light beam, while preventing the displacement range from being too large to interfere with other components.

[0054] In this embodiment, the chord height of the arc track in the direction perpendicular to the arrangement direction of the corresponding pair of cutting blades 200 is less than 0.8 cm, and more preferably less than 0.5 cm. The smaller the chord height, the more conducive to the control of the cutting blade 200. At the same time, the chord height of the arc track in the direction perpendicular to the arrangement direction of the corresponding pair of cutting blades 200 is greater than 0.2 cm, so as to prevent the cutting blade 200 from being displaced too little in the direction perpendicular to the arrangement direction of the pair of cutting blades 200.

[0055] In a preferred embodiment of the present invention, the length of the second rod 320 is greater than 1 / 2 of the diameter of the light hole 110 and less than the diameter of the light hole 110. In this way, when the hinge point of the second rod 320 and the first rod 310 rotates from the position farthest from the light hole 110 to the position closest to the light hole 110, with the cooperation of the other two connecting rods 300, the cutting blade 200 can move from the position of completely opening the light hole 110 to the position of completely covering the light hole 110 to produce different shading effects, and at the same time, the second rod 320 will not be too long to occupy too much activity space.

[0056] Preferably, the length of the second rod 320 is greater than 1 / 2 of the diameter of the light through hole 110 and less than 2 / 3 of the diameter of the light through hole 110 .

[0057] In a preferred embodiment of the present invention, during the movement of the guide point 220 along the arc track, when the guide point 220 is in the middle of the arc track, the position of the cutting blade 200 deviates the farthest from the center of the light-through hole 110 in a direction perpendicular to the arrangement direction of the corresponding pair of cutting blades 200. In this way, during the movement of the guide point 220 from one end of the arc track to the other end, the cutting blade 200 will reciprocate in a direction perpendicular to the arrangement direction of the pair of cutting blades 200, constantly changing the area where the cutting blade 200 intercepts the light beam, and will not occupy too much activity space.

[0058] In a preferred embodiment of the present invention, the first rod 310 has an avoidance curve 311 for avoiding the driving shaft 410 of the driving mechanism 400. The avoidance curve 311 increases the movable range of the first rod 310, thereby making the movable range of the cutting blade 200 larger.

[0059] In this embodiment, the avoidance curve 311 is substantially V-shaped, and the first rod 310 continues to extend toward the cutting blade 200 at one end of the avoidance curve 311 close to the cutting blade 200 .

[0060] In a preferred embodiment of the present invention, the distance between the two ends of the cutting blade 200 and the hinge point of the first rod 310 is greater than or equal to the diameter of the light hole 110. times, which is less than or equal to 2 times the diameter of the light-through hole 110. Thus, the cutting blade 200 can be arranged in a direction of 30° (corresponding to the distance between the hinge points of the two ends of the cutting blade 200 and the first rod body 310 being less than or equal to 2 times the diameter of the light-through hole 110) to 45° (corresponding to the distance between the hinge points of the two ends of the cutting blade 200 and the first rod body 310 being greater than or equal to 1 / 2 of the diameter of the light-through hole 110) relative to the corresponding pair of cutting blades 200. The light hole 110 is closed in a direction of (times).

[0061] In a preferred embodiment of the present invention, a separator 600 is further included for limiting the movement of the cutting blade 200 in a direction perpendicular to the plane in which it is located. The separator 600 has a hollow hole 610 for the light beam to pass through. During the movement of the cutting blade 200, the side of the cutting blade 200 adjacent to the cutting edge 210 is always located outside the hollow hole 610. In this way, it is not easy for the cutting blade 200 to be blocked with the hollow hole 610, and the side of the cutting blade 200 adjacent to the cutting edge 210 will not enter the hollow hole 610 for imaging, thereby avoiding affecting the light effect.

[0062] Optionally, in a direction perpendicular to the plane where the cutting blades 200 are located, the separator 600 is disposed between any two adjacent cutting blades 200 to prevent the two adjacent cutting blades 200 from interfering with each other.

[0063] In a preferred embodiment of the present invention, the second rod 320 is limited to its maximum forward rotation angle and maximum reverse rotation angle by only one limiting column 321. The second rod 320 can rotate both forward and reverse, so that the process of the cutting blade 200 cutting in / out of the limit angle is smooth and fast, and the number of the limiting columns 321 can be reduced, thereby reducing costs.

[0064] In this embodiment, the limiting column 321 is located at a side of the driving shaft 410 of the driving mechanism 400 away from the light through hole 110 .

[0065] In other embodiments, the guide member is a guide plate 520 (not shown), and the guide plate 520 has an arc-shaped guide groove 521, and the guide point 220 moves along the guide groove 521. Directly using the guide groove 521 to guide the guide point 220 to move in an arc shape can make the structure of the guide member simple, and the route of the arc track can be more varied.

[0066] The guide point 220 is held in the guide groove 521 and can slide along the length direction of the guide groove 521 .

[0067] The guide plate 520 may be directly the white round sheet 100 , or directly the separator 600 , or may be a separate plate.

[0068] In a preferred embodiment of the present invention, two pairs of cutting blades 200 are included, and the arrangement directions of the two pairs of cutting blades 200 are perpendicular to each other. The four cutting blades 200 cooperate with each other to cut the light beam, so that the light beam produces light spots of various shapes.

[0069] In a preferred embodiment of the present invention, the guide points 220 of two adjacent cutting blades 200 are located on the side close to each other or away from each other. In this way, two adjacent cutting blades 200 can leave space for installation of other components.

[0070] like Figure 3 In a preferred embodiment of the present invention, a sleeve 420 is detachably fixed to the driving shaft 410 of the driving mechanism 400, and the end of the second connecting rod 300 is connected to the sleeve 420. By replacing the sleeves 420 of different heights, the height of the second connecting rod 300 and the cutting blade 200 can be adjusted, which is conducive to the standardization of components.

[0071] In this embodiment, the height of the mounting hole on the driving shaft 410 of the driving mechanism 400 is fixed, and a screw passes through the bushing 420 and is inserted into the mounting hole to fix the bushing 420 .

[0072] like Figure 4 The present invention further provides a stage light, comprising a lamp head 800, wherein a light source 810 and a cutter according to any one of claims 1 to 19 are arranged in the lamp head 800, and the light emitted by the light source 810 passes through the light hole 110 of the cutter and then is emitted from the light outlet 820 of the lamp head 800. The cutter can be used to cut the light beam emitted by the light source 810 into different shapes for projection, thereby generating a variety of light effects.

[0073] In a preferred embodiment of the present invention, the lamp head 800 is further provided with an effect component for interfering the light beam to produce light effects, a focusing component 830 for adjusting the focus of the light beam, and / or an amplifying component 840 for adjusting the divergence angle of the light beam. The effect component can interfere with the light beam to produce rich light effects, the focusing component 830 can adjust the clarity of the light spot, and the amplifying component 840 can adjust the size of the light spot. The effect component can be a CMY component 850 or a pattern plate component 860.

[0074] In a preferred embodiment of the present invention, a support arm 900 for supporting the rotation of the lamp head 800 and a chassis 910 for supporting the rotation of the support arm 900 are also included. By rotating the lamp head 800 and the support arm 900, the light beam emitted by the lamp head 800 can be projected in any direction.

[0075] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled 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 list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A cutter with an arc guide, characterized in that: The invention comprises a white round disc (100) having a light-through hole (110) for a light beam to pass through, at least one pair of cutting discs (200) arranged opposite to each other, each pair of the cutting discs (200) having a cutting edge (210) for cutting a light beam on a side close to each other, and two ends on a side away from each other are respectively connected to a two-link rod (300), the two-link rod (300) comprising a first rod body (310) and a second rod body (320) pivotally connected to each other, the other end of the first rod body (310) being hinged to the cutting disc (200), the other end of the second rod body (320) being driven to rotate by a driving mechanism (400), and also comprising a guide member for limiting the movement of a guide point (220) on the cutting disc (200) along an arc track in the plane where the guide point (220) is located, and a rotatable base plate (700), the driving mechanism (400) being fixed to the base plate (700), and the base plate (700) driving all the cutting discs (200) to rotate as a whole.

2. The cutter with arc guide according to claim 1, characterized in that: The arc track is in the shape of a circular arc.

3. The cutter with arc guide according to claim 2, characterized in that: The center of the arc track and the center of the light-through hole (110) are located on two sides of the arc track respectively.

4. The cutter with arc guide according to claim 2, characterized in that: The guide member is a guide rod (510), one end of the guide rod (510) is hinged to the guide point (220), and the other end is pivotally fixed.

5. The cutter with arc guide according to claim 4, characterized in that: The length of the second rod body (320) is less than the distance between the driving shaft (410) of the driving mechanism (400) and the center of the arc track.

6. The cutter with arc guide according to claim 1, 2 or 3, characterized in that: The guide point (220) is a hinge point between the cutting blade (200) and one of the first rod bodies (310).

7. The cutter with arc guide according to claim 2, characterized in that: The chord length of the arc track in the arrangement direction of the corresponding pair of cutting sheets (200) is greater than the aperture of the light-through hole (110).

8. The cutter with arc guide according to claim 2, characterized in that: The radius of the arc track is greater than 1 / 2 of the maximum distance between the two ends of the two connecting rods (300).

9. The cutter with arc guide according to claim 2, characterized in that: The chord height of the arc track in a direction perpendicular to the arrangement direction of the corresponding pair of cutting blades (200) is less than 1 cm.

10. The cutter with arc guide according to claim 1, characterized in that: The length of the second rod body (320) is greater than 1 / 2 of the diameter of the light-through hole (110) and less than the diameter of the light-through hole (110).

11. The cutter with arc guide according to claim 1, characterized in that: During the movement of the guide point (220) along the arc track, when the guide point (220) is in the middle of the arc track, the cutting blade (200) deviates the farthest from the center of the light-through hole (110) in a direction perpendicular to the arrangement of the corresponding pair of cutting blades (200).

12. The cutter with arc guide according to claim 1, characterized in that: The first rod body (310) has an avoidance curve (311) for avoiding the driving shaft (410) of the driving mechanism (400).

13. The cutter with arc guide according to claim 1, characterized in that: The distance between the two ends of the cutting blade (200) and the hinge point of the first rod body (310) is greater than or equal to the diameter of the light-through hole (110). times, and is less than or equal to twice the diameter of the light through hole (110).

14. The cutter with arc guide according to claim 1, characterized in that: It also includes a separator (600) for limiting the movement of the cutting blade (200) in a direction perpendicular to the plane in which it is located, the separator (600) having a hollow hole (610) for a light beam to pass through, and during the movement of the cutting blade (200), the side edge of the cutting blade (200) adjacent to the cutting edge (210) is always located outside the hollow hole (610).

15. The cutter with arc guide according to claim 1, characterized in that: The second rod body (320) is limited in its maximum forward rotation angle and maximum reverse rotation angle by only one limiting column (321).

16. The cutter with arc guide according to claim 1, 2 or 3, characterized in that: The guide member is a guide plate (520), the guide plate (520) is provided with an arc-shaped guide groove (521), and the guide point (220) moves along the guide groove (521).

17. The cutter with arc guide according to claim 1, characterized in that: It comprises two pairs of cutting blades (200), and the arrangement directions of the two pairs of cutting blades (200) are perpendicular to each other.

18. The cutter with arc guide according to claim 17, characterized in that: The guide points (220) of two adjacent cutting blades (200) are located on a side close to or far away from each other.

19. The cutter with arc guide according to claim 1, characterized in that: A shaft sleeve (420) is detachably fixed on the driving shaft (410) of the driving mechanism (400), and the ends of the two connecting rods (300) are connected to the shaft sleeve (420).

20. A stage light, characterized in that: The invention comprises a lamp head (800), wherein a light source (810) and a cutter according to any one of claims 1 to 19 are arranged in the lamp head (800), and light emitted by the light source (810) passes through the light hole (110) of the cutter and then is emitted from a light outlet (820) of the lamp head (800).

21. The stage light according to claim 20, characterized in that: The lamp head (800) is also provided with an effect component for interfering the light beam to produce a light effect, a focusing component (830) for adjusting the focus of the light beam, and / or an amplifying component (840) for adjusting the divergence angle of the light beam.

22. The stage light according to claim 20, characterized in that: It also includes a support arm (900) for supporting the lamp head (800) to rotate, and a chassis (910) for supporting the support arm (900) to rotate.

Images