Cutter with arc-shaped guiding function and stage lamp

Abstract

The utility model discloses a cutter and a stage lamp with arc guidance, the cutter comprises a white wafer with a light through hole for light beams to pass through and at least one pair of oppositely arranged cutting blades, one side of each pair of cutting blades close to each other is provided with a cutting edge for cutting the light beams, two ends of one side of each pair of cutting blades far away from each other are respectively connected with a two-connecting rod, and the two-connecting rods are respectively connected with the white wafer and the at least one pair of cutting blades. The two-connecting rod comprises a first rod body and a second rod body which are pivoted with each other, the other end of the first rod body is hinged with the cutting blade, the other end of the second rod body is driven to rotate by a driving mechanism, and the two-connecting rod further comprises a guide piece used for limiting a guide point on the cutting blade to move along an arc-shaped track on the plane where the guide point is located. 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 pair of cutting blades under the guide of the guide points in the process that the pair of cutting blades move face to face or back to back, and the light beam intercepting area of the cutting blades can change more quickly; and long-term heat concentration is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of cutter, more particularly to a cutter with arc guiding and stage lamp. BACKGROUND

[0002] As a common performance equipment, the stage lamp has higher and higher requirements for brightness, and the power of light source is increasing, and the cutter for cutting the light beam in the lamp, the actual principle of which is to use the cutting sheet to shield the light beam, so that the light beam presents various shapes. Because the energy of the light beam is getting higher and higher, the cutting sheet absorbs more and more heat when shielding the light beam, which is easy to cause thermal deformation of itself and affect the imaging effect of the light spot. SUMMARY

[0003] The utility model discloses a cutter with arc guiding to overcome at least one of the defects of the prior art, which can quickly replace the cutting sheet in different areas to intercept the light beam and avoid excessive local heat absorption of the cutting sheet.

[0004] To solve the above technical problems, the utility model adopts the technical scheme of a cutter with arc guiding, which comprises a white round sheet with a light transmission hole for the light beam to pass through, at least one pair of oppositely arranged cutting sheets, each cutting sheet having a cutting edge on one side for cutting the light beam, and two connecting rods connected to the ends of the two cutting sheets away from each other, wherein the connecting rods comprise a first rod body and a second rod body pivotally connected to each other, the other end of the first rod body is hingedly connected to the cutting sheet, and the other end of the second rod body is driven to rotate by a driving mechanism, and further comprising a guide for limiting the movement of the guide point on the cutting sheet along an arc trajectory in the plane.

[0005] The cutter with arc guiding is provided with a guide point on the cutting sheet, which moves along an arc trajectory, so that during the movement of the pair of cutting sheets towards or away from each other, the cutting sheets will simultaneously produce a certain displacement in the direction perpendicular to the arrangement direction of the pair of cutting sheets under the guidance of the guide point, so that the area of the cutting sheet intercepting the light beam changes faster, avoiding the long-term concentration of heat, which causes thermal deformation of the cutting edge, affects the imaging effect of the light spot or directly damages it.

[0006] Further, the arc trajectory is a circular arc. The guide can limit the arc trajectory with a simple structure.

[0007] Further, the centers of the arc trajectory and the light transmission hole are located on the two sides of the arc trajectory respectively. During the movement of the cutting sheet, the mutual interference of the remaining moving elements is reduced.

[0008] Further, the guide is a guide rod, one end of which is hingedly connected to the guide point, and the other end is pivotally fixed. That is, the end of the guide rod hingedly connected to the guide point moves along a circular arc with the other end as the radius, and the trajectory of the movement is the arc trajectory. The guide rod can effectively reduce the jamming by guiding the guide point.

[0009] Further, the length of the second rod body is less than the distance between the driving shaft of the driving mechanism and the center of the arc trajectory. This avoids the second rod body from touching the pivot column of the pivotally fixed end of the guide rod corresponding to the adjacent cutting piece during rotation.

[0010] Further, the guide point is the hinged point of the cutting piece and one of the first rod bodies. Directly using the hinged point of the cutting piece and one of the first rod bodies as the guide point can utilize the existing structure and avoid interference between the guide point and other components or the avoidance of movement space for the guide point by other components.

[0011] Further, the chord length of the arc trajectory in the arrangement direction of the corresponding pair of cutting pieces is greater than the aperture of the light passage hole. That is, the arc trajectory allows the cutting piece to move from a position fully opening the light passage hole to a position fully shielding the light passage hole under the cooperation of the two connecting rods, to produce different light shielding effects.

[0012] Further, the radius of the arc trajectory is greater than 1 / 2 of the maximum distance between the two ends of the connecting rod. This ensures that the chord height of the arc trajectory with the same chord length is not too large, avoiding the occupation of too much space by the movement range of the guide point.

[0013] Further, the chord height of the arc trajectory perpendicular to the arrangement direction of the corresponding pair of cutting pieces is less than 1 cm. This allows the cutting piece to produce a certain displacement in the direction perpendicular to the arrangement direction of the pair of cutting pieces, serving to quickly change the area of the cutting piece intercepting the light beam, and avoids interference with other components due to too large displacement range.

[0014] Further, the length of the second rod body is greater than 1 / 2 of the diameter of the light passage hole and less than the diameter of the light passage hole. In this way, when the hinged point of the second rod body and the first rod body rotates from the position farthest from the light passage hole to the position closest to the light passage hole, the cutting piece can move from a position fully opening the light passage hole to a position fully shielding the light passage hole under the cooperation of the other connecting rod, to produce different light shielding effects, while the second rod body is not too long and does not occupy too much movement space.

[0015] Further, during the movement of the guide point along the arc-shaped track, when the guide point is at the middle position of the arc-shaped track, the cutting piece is farthest from the center of the light hole in a direction perpendicular to the arrangement direction of the corresponding pair of cutting pieces. Thus, during the movement of the guide point from one end of the arc-shaped track to the other end, the cutting piece reciprocates in a direction perpendicular to the arrangement direction of the pair of cutting pieces, constantly changes the area of the cutting piece intercepting the light beam, and does not occupy too much active space.

[0016] Further, the first rod body has an avoidance bend for avoiding the driving shaft of the driving mechanism. The avoidance bend increases the active range of the first rod body, so that the active range of the cutting piece is larger.

[0017] Further, the distance between the two ends of the cutting piece and the hinge points of the first rod body is greater than or equal to 1.5 times the diameter of the light hole and less than or equal to 2 times the diameter of the light hole. Thus, the cutting piece can close the light hole in a direction of 30° to 45° with respect to the arrangement direction of the corresponding pair of cutting pieces.

[0018] Further, a separation piece for limiting the movement of the cutting piece in a direction perpendicular to the plane in which the cutting piece is located is further included. The separation piece has a hollow hole through which the light beam passes, and during the movement of the cutting piece, the side edge adjacent to the cutting edge of the cutting piece is always located outside the hollow hole. Thus, the cutting piece and the hollow hole are not easily blocked, and the side edge adjacent to the cutting edge of the cutting piece does not enter the hollow hole to form an image, so as to avoid affecting the light effect.

[0019] Further, the second rod body is limited in the maximum positive rotation angle and the maximum reverse rotation angle by only one limiting column. The second rod body can be positively rotated and reversely rotated, so that the process of the cutting piece cutting in / cutting out is smooth and rapid, and the number of limiting columns can be reduced, and the cost is reduced.

[0020] Further, the guide is a guide plate, and the guide plate has an arc-shaped guide groove, and the guide point moves along the guide groove. Directly using the guide groove to guide the arc-shaped movement of the guide point can make the structure of the guide simple, and the route of the arc-shaped track can be more variable.

[0021] Further, two pairs of the cutting pieces are included, and the arrangement directions of the two pairs of cutting pieces are perpendicular to each other. The four cutting pieces cooperate with each other to cut the light beam, so that the light beam generates light spots of various shapes.

[0022] ​Further, the guide points of two adjacent cutting pieces are located on the side close to or away from each other, so that the installation of other components is completely free.

[0023] Further, a shaft sleeve is detachably fixed on the driving shaft of the driving mechanism, and the end of the two connecting rods is linked with the shaft sleeve.

[0024] The utility model also provides a stage lamp, including the lamp holder, be provided with light source and preceding any one of the cutter in the lamp holder, the light of light source is after the light hole of cutter from the light outlet of lamp holder shoots out. Utilize the cutter can cut the light beam of light source into different shape and project, produce abundant light effect.

[0025] Further, the lamp holder is also provided with an effect component for interfering light beam to generate light effect, a focusing component for adjusting light beam focus and / or an amplification component for adjusting light beam divergence angle. The effect component can interfere light beam to generate abundant light effect, the focusing component can adjust the definition of light spot, and the amplification component can adjust the size of light spot.

[0026] Further, the utility model also includes a support arm for supporting the rotation of the lamp holder and a case for supporting the rotation of the support arm. Through the rotation of the lamp holder and the support arm, the light beam emitted by the lamp holder can be projected to any direction. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is the whole structure schematic diagram of the cutting piece of the utility model with arc-shaped guide.

[0028] Figure 2 It is the schematic diagram of the driving structure of the cutting piece of the utility model.

[0029] Figure 3 It is the schematic diagram of another view of the driving structure of the cutting piece of the utility model.

[0030] Figure 4 It is the explosion structure schematic diagram of the stage lamp of the utility model.

[0031] In the drawing:

[0032] 100, white round piece; 110, light hole; 200, cutting piece; 210, cutting edge; 220, guide point; 300, two connecting rods; 310, first rod body; 311, avoiding bending; 320, second rod body; 321, limiting column; 400, driving mechanism; 410, driving shaft; 420, shaft sleeve; 510, guide rod; 511, pivoting column; 600, separation piece; 610, hollow hole; 700, base plate; 800, lamp holder; 810, light source; 820, light outlet; 830, focusing assembly; 840, magnifying assembly; 850, CMY assembly; 860, pattern disc assembly; 900, support arm; 910, case. DETAILED DESCRIPTION

[0033] The accompanying drawings are only used for illustrative description and cannot be understood as limitation to the patent; in order to better illustrate the embodiment, some components in the drawings are omitted, enlarged or reduced, and do not represent the size of the actual product; it is understandable for those skilled in the art that some well-known structures and their descriptions in the drawings can be omitted. The positional relationship described in the drawings is only used for illustrative description and cannot be understood as limitation to the patent.

[0034] As Figures 1 to 3 The utility model provides a cutting device with arc guiding, including the white round piece 100 with the light hole 110 for the light beam to pass through, at least 1 pair of opposite cutting piece 200, each cutting piece 200 has the cutting edge 210 for cutting light beam on the side of mutual approach, and the two ends of the side of mutual departure are connected with two connecting rods 300 respectively, the two connecting rods 300 include the first rod body 310 and the second rod body 320 that pivotally connect with each other, the first rod body 310 other end is hinged with the cutting piece 200, the second rod body 320 other end is driven to rotate by the driving mechanism 400, further include the guide for limiting the guide point 220 on the cutting piece 200 along the arc trajectory movement in the plane where it is.

[0035] The cutting device with arc guiding makes the guide point 220 on the cutting piece 200 and makes it along the arc trajectory movement, so that in the process of the approach or the away of the cutting piece 200, the cutting piece 200 is guided under the guide of the guide point 220, and a certain displacement is generated along the direction perpendicular to the arrangement direction of the cutting piece 200, so that the region of the cutting piece 200 intercepting light beam changes faster, avoids the long-term heat concentration, causes the thermal deformation of the cutting edge 210, and influences the imaging effect of light spot or directly damages.

[0036] It should be noted that the hinged point of the first rod body 310 and the cutting piece 200 is fixed relative to the position of the cutting piece 200, and will not displace relative to the cutting piece 200.

[0037] The other end of the second rod body 320 is driven to rotate by the driving mechanism 400, so that the end linked with the first rod body 310 swings, thereby driving the end connected with the first rod body 310 to move along a circular arc with the end linked with the driving mechanism 400 as the center and the length of the second rod body 320 as the radius, under the guidance of the guide to the guide point 220, each specific rotation angle of the two second rod bodies 320 corresponding to the same cutting sheet 200 corresponds to a unique position of the cutting sheet 200.

[0038] In the embodiment, a rotatable base plate 700 is further included, and the driving mechanism 400 is fixed to the base plate 700, and the base plate 700 drives the whole cutting sheet 200 to rotate as a whole.

[0039] Preferably, each pair of cutting sheets 200 is in different planes.

[0040] In the embodiment, the cutting edge 210 is a straight edge.

[0041] In the embodiment, the two ends of each pair of cutting sheets 200 away from each other protrude a connecting sheet for being hinged with the first rod body 310.

[0042] In the preferred embodiment of the utility model, the arc trajectory is a circular arc. It is convenient for the guide to limit the arc trajectory with a simple structure.

[0043] The central angle corresponding to the arc trajectory is less than 45°, preferably less than 35°, more preferably less than 20°, and in the embodiment, the central angle corresponding to the arc trajectory is less than 15°.

[0044] In the preferred embodiment of the utility model, the center of the arc trajectory and the center of the light hole 110 are respectively located on the two sides of the arc trajectory. The mutual interference of the remaining moving elements in the movement of the cutting sheet 200 is reduced. That is, the center of the light hole 110 is located outside the region defined by the circle corresponding to the arc trajectory.

[0045] In the preferred embodiment of the utility model, the guide is a guide rod 510, one end of the guide rod 510 is hinged with the guide point 220, and the other end is pivotally fixed. By using the guide rod 510 to guide the guide point 220, the jamming can be effectively reduced.

[0046] The shape of the guide rod 510 can be any shape, preferably a straight line.

[0047] 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 a circular arc with the pivotally fixed point of the guide rod 510 as the center and the length of the guide rod 510 as the radius, and the trajectory of the movement is the arc-shaped trajectory, wherein the length of the guide rod 510 refers to the distance between the pivotally fixed point and the guide point 220.

[0048] In the preferred embodiment of the utility model, 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-shaped trajectory. The length of the second rod body 320 refers to the distance between the hinged point of the second rod body 320 and the first rod body 310 and the driving shaft 410 of the driving mechanism 400, and the center of the arc-shaped trajectory is the pivotally fixed point of the guide rod 510. The length of the second rod body 320 being less than the distance between the driving shaft 410 of the driving mechanism 400 and the center of the arc-shaped trajectory can avoid the second rod body 320 from touching the pivotally fixed end of the guide rod 510 of the adjacent cutting sheet 200 during rotation.

[0049] Optionally, the guide point 220 can be any position on the cutting sheet 200. In the preferred embodiment of the utility model, the guide point 220 is the hinged point between the cutting sheet 200 and one of the first rod bodies 310. Directly using the hinged point between the cutting sheet 200 and one of the first rod bodies 310 as the guide point 220 can utilize the existing structure and avoid interference between the guide point 220 and other components or the avoidance of the movement space of the guide point 220 by other components.

[0050] In the embodiment, the guide point 220 is a column with expanded ends, the column passes through the cutting sheet 200, the first rod body 310 and the guide rod 510, and the expanded ends at both ends can prevent falling off.

[0051] In the preferred embodiment of the utility model, the chord length of the arc-shaped trajectory in the arrangement direction of one pair of the cutting sheets 200 is greater than the aperture of the light passing hole 110. That is, the arc-shaped trajectory allows the cutting sheet 200 to move from the position of completely opening the light passing hole 110 to the position of completely shielding the light passing hole 110 under the cooperation of the two second connecting rods 300, so as to produce different shading effects.

[0052] In the embodiment, the chord length of the arc-shaped trajectory in the arrangement direction of one pair of the cutting sheets 200 is less than 1.2 times the aperture of the light passing hole 110.

[0053] In the preferred embodiment of the utility model, the radius of the arc trajectory is greater than 1 / 2 of the maximum distance between the two ends of the two connecting rods 300. This ensures that the chord height of the arc trajectory with the same chord length is not too large, and avoids the activity range of the guide point 220 occupying too much space.

[0054] In the embodiment, the radius of the arc trajectory is less than 1.5 times the maximum distance between the two ends of the two connecting rods 300.

[0055] In the preferred embodiment of the utility model, the chord height of the arc trajectory in the direction perpendicular to the arrangement direction of the corresponding pair of cutting pieces 200 is less than 1 cm. This allows the cutting piece 200 to produce a certain displacement in the direction perpendicular to the arrangement direction of the pair of cutting pieces 200, plays a role in quickly changing the area of the cutting piece 200 intercepting the light beam, and avoids the displacement range being too large to interfere with other components.

[0056] In the embodiment, the chord height of the arc trajectory in the direction perpendicular to the arrangement direction of the corresponding pair of cutting pieces 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 piece 200. At the same time, the chord height of the arc trajectory in the direction perpendicular to the arrangement direction of the corresponding pair of cutting pieces 200 is greater than 0.2 cm, which avoids the cutting piece 200 from being displaced too small in the direction perpendicular to the arrangement direction of the pair of cutting pieces 200.

[0057] In the preferred embodiment of the utility model, the length of the second rod body 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, during the rotation of the hinge point of the second rod body 320 and the first rod body 310 from the position farthest from the light hole 110 to the position closest to the light hole 110, the cutting piece 200 can move from the position fully opening the light hole 110 to the position fully shielding the light hole 110 under the cooperation of the other two connecting rods 300, to produce different shading effects. At the same time, the second rod body 320 is not too long and does not occupy too much activity space.

[0058] Preferably, the length of the second rod body 320 is greater than 1 / 2 of the diameter of the light hole 110 and less than 2 / 3 of the diameter of the light hole 110.

[0059] In a preferred embodiment of this invention, during the movement of the guide point 220 along the arc-shaped trajectory, when it is in the middle position of the arc-shaped track, the cutting blade 200 is furthest from the center of the light-transmitting hole 110 in a position perpendicular to the arrangement direction of the corresponding pair of cutting blades 200. Thus, as the guide point 220 moves from one end of the arc-shaped trajectory to the other, the cutting blade 200 will reciprocate in a direction perpendicular to the arrangement direction of the pair of cutting blades 200, continuously changing the area where the cutting blade 200 intercepts the light beam, without occupying excessive space.

[0060] In a preferred embodiment of this invention, the first rod 310 has a relief bend 311 for avoiding the drive shaft 410 of the drive mechanism 400. The relief bend 311 increases the range of motion of the first rod 310, thereby allowing the cutting blade 200 to have a larger range of motion.

[0061] In this embodiment, the avoidance bend 311 is generally V-shaped, and the first rod 310 continues to extend toward the cutting blade 200 at the end of the avoidance bend 311 near the cutting blade 200.

[0062] In a preferred embodiment of this utility model, the distance between the hinge points of the two ends of the cutting blade 200 and the first rod body 310 is greater than or equal to the diameter of the light-transmitting hole 110. The distance between the two ends of the cutting blade 200 and the hinge point of the first rod 310 is less than or equal to twice the diameter of the light-transmitting hole 110. This allows the cutting blade 200 to be positioned relative to the arrangement direction of the corresponding pair of cutting blades 200 at an angle of 30° (corresponding to the distance between the hinge point of the two ends of the cutting blade 200 and the first rod 310 being less than or equal to twice the diameter of the light-transmitting hole 110) to 45° (corresponding to the distance between the hinge point of the two ends of the cutting blade 200 and the first rod 310 being greater than or equal to the diameter of the light-transmitting hole 110). The light-transmitting hole 110 is closed in the direction of (times).

[0063] In a preferred embodiment of this invention, a separator 600 is further included to restrict the movement of the cutting blade 200 in a direction perpendicular to its plane. The separator 600 has a perforated hole 610 through which a light beam passes. During the movement of the cutting blade 200, the side of the cutting blade 200 adjacent to the cutting edge 210 is always outside the perforated hole 610. This prevents the cutting blade 200 from easily getting stuck in the perforated hole 610, and also prevents the side of the cutting blade 200 adjacent to the cutting edge 210 from entering the perforated hole 610 for imaging, thus avoiding affecting the light efficiency.

[0064] Optionally, the spacer 600 is arranged between any two adjacent cutting pieces 200 in a direction perpendicular to the plane in which the cutting pieces 200 are located, so as to avoid interference between the two adjacent cutting pieces 200.

[0065] In the preferred embodiment of the present application, the second rod body 320 is limited in the maximum positive rotation angle and the maximum reverse rotation angle by only one limiting column 321. The second rod body 320 can rotate in both positive and reverse directions, so that the cutting-in / cutting-out limit angle of the cutting piece 200 is smooth and rapid, and the number of the limiting columns 321 can be reduced, thereby reducing the cost.

[0066] In the embodiment, the limiting column 321 is located on the side of the driving shaft 410 of the driving mechanism 400 away from the light hole 110.

[0067] In other embodiments, the guide is a guide plate 520 (not shown) having an arc-shaped guide groove 521 on the guide plate 520, and the guide point 220 moves along the guide groove 521. The arc-shaped movement of the guide point 220 is directly guided by the guide groove 521, so that the structure of the guide is simple, and the route of the arc-shaped trajectory can be more variable.

[0068] The guide point 220 is clamped in the guide groove 521 and can slide along the length direction of the guide groove 521.

[0069] The guide plate 520 can be directly the white round piece 100, or directly the spacer 600, or a separately arranged plate.

[0070] In the preferred embodiment of the present application, two pairs of the cutting pieces 200 are included, and the arrangement directions of the two pairs of the cutting pieces 200 are perpendicular to each other. The four cutting pieces 200 cooperate with each other to cut the light beam, so that the light beam generates light spots of various shapes.

[0071] In the preferred embodiment of the present application, the guide points 220 of the two adjacent cutting pieces 200 are located on the side where they are close to or away from each other. In this way, the side where the two adjacent cutting pieces 200 are away from or close to each other can leave a position, so that other components can be installed freely.

[0072] As Figure 3 In the preferred embodiment of the present application, the driving shaft 410 of the driving mechanism 400 is detachably fixed with a shaft sleeve 420, and the end of the two connecting rods 300 is linked with the shaft sleeve 420. By replacing the shaft sleeve 420 with different heights, the height of the two connecting rods 300 and the cutting piece 200 can be adjusted, which is beneficial to the standardization of components.

[0073] In the embodiment, the mounting hole on the driving shaft 410 of the driving mechanism 400 is fixed in height, and the shaft sleeve 420 is fixed by inserting a screw through the shaft sleeve 420 and into the mounting hole.

[0074] As Figure 4 The utility model also provides a stage lamp, including the lamp holder 800, be provided with light source 810 and preceding any one of the cutter in the lamp holder 800, the light of light source 810 passes through the light hole 110 of cutter after from the light outlet 820 of lamp holder 800 emits. Utilize the cutter can cut the light beam of light source 810 into different shape and project, produce abundant light effect.

[0075] In the preferred embodiment of the utility model, the lamp holder 800 is also provided with an effect component for interfering light beam to generate light effect, a focusing component 830 for adjusting light beam focal point and / or an amplification component 840 for adjusting light beam divergence angle. The effect component can interfere light beam to generate abundant light effect, the focusing component 830 can adjust the definition of light spot, and the amplification component 840 can adjust the size of light spot. The effect component can be a CMY component 850 or a pattern disc component 860.

[0076] In the preferred embodiment of the utility model, it also includes a support arm 900 for supporting the rotation of the lamp holder 800 and a case 910 for supporting the rotation of the support arm 900. Through the rotation of the lamp holder 800 and the support arm 900, the light beam emitted by the lamp holder 800 can be projected in any direction.

[0077] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not the limitation of the embodiments of the utility model. For ordinary skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and impossible to exhaust all the embodiments. Any modification, equivalent replacement and improvement, etc. made in the spirit and principle of the utility model should be included in the protection scope of the utility model claims.

Claims

1. A cutter with an arc-shaped guide, characterized in that, The device includes a white disc (100) having a light-transmitting aperture (110) for a light beam to pass through, at least one pair of opposing cutting blades (200), each pair of cutting blades (200) having a cutting edge (210) for cutting the light beam on the side closer to each other, and a two-link (300) connected to each end on the opposite side. The two-link (300) includes a first link (310) and a second link (320) pivotally connected to each other. The other end of the first link (310) is hinged to the cutting blade (200), and the other end of the second link (320) is driven to rotate by a drive mechanism (400). The device also includes a guide for limiting the movement of a guide point (220) on the cutting blade (200) along an arcuate trajectory in its plane.

2. The cutter with arc-shaped guide according to claim 1, characterized in that, The arc-shaped trajectory is a circular arc.

3. The cutter with arc-shaped guide according to claim 2, characterized in that, The center of the arc-shaped trajectory and the center of the light-transmitting hole (110) are located on both sides of the arc-shaped trajectory.

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

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

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

7. The cutter with arc-shaped guide according to claim 2, characterized in that, The chord length of the arc trajectory in the direction of the corresponding pair of cutting pieces (200) is greater than the aperture of the light-transmitting hole (110).

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

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

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

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

12. The cutter with an arc-shaped guide according to claim 1, characterized in that, The first rod (310) has a avoidance bend (311) for avoiding the drive shaft (410) of the drive mechanism (400).

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

14. The cutter with arc-shaped guide according to claim 1, characterized in that, It also includes a separator (600) for restricting the movement of the cutting blade (200) in a direction perpendicular to its plane. The separator (600) has a perforated hole (610) through which a light beam passes. During the movement of the cutting blade (200), the side of the cutting blade (200) adjacent to the cutting edge (210) is always outside the perforated hole (610).

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

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

17. The cutter with arc-shaped guide according to claim 1, characterized in that, It includes two pairs of cutting blades (200), and the two pairs of cutting blades (200) are arranged perpendicular to each other.

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

19. The cutter with arc-shaped guide according to claim 1, characterized in that, A bushing (420) is detachably fixed on the drive shaft (410) of the drive mechanism (400), and the end of the two connecting rods (300) is connected to the bushing (420).

20. A stage light, characterized in that, The device includes a lamp head (800), which is provided with a light source (810) and a cutter as described in any one of claims 1-19. The light emitted by the light source (810) passes through the light-transmitting hole (110) of the cutter and is emitted from the light-emitting port (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 with the light beam to produce a light effect, a focusing component (830) for adjusting the focus of the light beam and / or an amplification 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 rotation of the lamp head (800) and a housing (910) for supporting the rotation of the support arm (900).

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