Projection cylinder

Abstract

The utility model is suitable for the technical field of photographic equipment, and provides a projection cylinder, which comprises a cylinder body and a shading assembly, the cylinder body is provided with an optical channel, the optical channel is provided with a light inlet and a light outlet which are opposite, the light inlet is used for being connected with a light source, and the cylinder body is provided with a plurality of inserting grooves which are communicated with the optical channel; the shading assembly is installed on the barrel and comprises a plurality of shading pieces, and the shading pieces are used for shading the inserting grooves. The anti-dazzling screen can shield the unused inserting groove, so that the condition of light leakage is reduced, and the projection effect of the projection cylinder is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of photographic equipment, and more particularly to a projection cylinder. BACKGROUND

[0002] In photographic lighting, in order to achieve various photographic and video light effects, a projection cylinder is installed on the photographic lamp, and different forms of light effect components are installed on the cylinder body of the projection cylinder, including an aperture and / or a projection sheet, to create diversified light effects to meet the needs. However, in actual use, the projection effect of the projection cylinder sometimes differs from the expectation after the cylinder body of the projection cylinder is combined with the detachable light effect components.

[0003] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present application, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. CONTENT OF THE UTILITY MODEL

[0004] The purpose of the embodiments of the present application is to provide a projection cylinder, which aims to solve the technical problem that the projection effect of the projection cylinder sometimes differs from the expectation after the cylinder body of the projection cylinder is combined with the detachable light effect components in the related art.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present application is:

[0006] The present application provides a projection cylinder, which comprises a cylinder body and a light shielding component.

[0007] The cylinder body has an optical channel, and the optical channel has opposite light inlet and light outlet. The light inlet is used to be connected with a light source. The cylinder body is provided with a plurality of plug-in slots, and the plug-in slots are in communication with the optical channel.

[0008] The light shielding component is installed on the cylinder body, and the light shielding component comprises a plurality of light shielding pieces. The light shielding pieces are used to shield the plug-in slots.

[0009] In a possible design, at least two plug-in slots among the plurality of plug-in slots are spaced apart along the length direction of the cylinder body.

[0010] In a possible design, the plurality of light shielding pieces are stacked, and the light shielding pieces are movable along the length direction of the cylinder body.

[0011] In a possible design, the light shielding component further comprises a fastener, and the fastener is used to install the light shielding pieces on the cylinder body.

[0012] The light shielding piece has a strip-shaped through hole, and the fastener passes through the strip-shaped through hole to be fixedly connected with the cylinder body. The light shielding piece is configured to be movable along the length direction of the strip-shaped through hole.

[0013] In a possible design, the light shielding assembly further includes a limiting sheet, the limiting sheet having a first through hole and a positioning column;

[0014] The positioning column is inserted into the cylindrical body through the strip-shaped through hole, and the fastener is sequentially inserted into the first through hole and the strip-shaped through hole to be fixedly connected with the cylindrical body.

[0015] In a possible design, the fastener is a screw, and the screw is threadedly connected with the cylindrical body.

[0016] The light shielding assembly further includes an elastic member, and the elastic member is located between the limiting sheet and the head of the screw.

[0017] In a possible design, at least one of the plurality of light shielding sheets can shield more than two insertion slots at the same time.

[0018] In a possible design, the material of the light shielding sheet is steel, aluminum alloy or plastic; and the number of the light shielding sheets is equal to the number of the insertion slots.

[0019] In a possible design, at least two of the plurality of insertion slots are distributed around the circumference of the cylindrical body.

[0020] In a possible design, the cylindrical body includes a front shell, a middle shell and a rear shell, the front shell is inserted into the middle shell, the rear shell is rotationally connected with the middle shell, the insertion slots are arranged on the middle shell, the light outlet is arranged on the front shell, and the light inlet is arranged on the rear shell.

[0021] The front shell is movable relative to the middle shell along a first direction, so that the cylindrical body can be telescoped, the first direction is parallel to the length direction of the cylindrical body; and the middle shell is rotatable relative to the rear shell.

[0022] In a possible design, among the plurality of insertion slots, one insertion slot is used for detachably mounting the diaphragm, and another insertion slot is used for detachably mounting the projection sheet.

[0023] When the diaphragm and / or the projection sheet are detached, one or more light shielding sheets can be moved to the insertion slot corresponding to the diaphragm and / or the projection sheet to shield the insertion slot.

[0024] In a possible design, the projection cylinder further includes a light cutting sheet, and the light cutting sheet is inserted into the cylindrical body.

[0025] The projection cylinder provided in the application has the following beneficial effects:

[0026] The application is provided with a plurality of insertion grooves on the barrel, so that an aperture or a projection film can be inserted into the insertion groove; and since the number of insertion grooves is multiple, the aperture and the projection film can be inserted into the barrel at the same time to meet the needs of different application scenarios. Since the insertion grooves are communicated with the optical channel, when the light inlet is communicated with the light source, when the aperture or the projection film is not installed in the insertion groove, the light may be emitted from the insertion groove, causing the barrel to leak light, and the light shield can shield the unused insertion groove, thereby reducing the light leakage, and then being conducive to ensuring the projection effect of the projection barrel. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0028] Figure 1 is a structural schematic diagram of a projection barrel provided by the present application;

[0029] Figure 2 is Figure 1 is a partial enlarged structural schematic diagram of B in

[0030] Figure 3 is Figure 1 is a structural schematic diagram of another view of the projection barrel in

[0031] Figure 4 is Figure 1 is a structural schematic diagram of another view of the projection barrel in

[0032] Figure 5 is an assembly drawing of a rotating assembly provided by the present application;

[0033] Figure 6 is Figure 5 is a structural schematic diagram of another view of the rotating assembly in

[0034] Figure 7 is an exploded view of the rotating assembly provided by the present application;

[0035] Figure 8 is an assembly drawing of a light shielding assembly provided by the present application;

[0036] Figure 9 is an exploded view of the light shielding assembly provided by the present application;

[0037] Figure 10 is a structural schematic diagram of a first light shielding piece in the present application;

[0038] Figure 11 This is a schematic diagram of the structure of the second light-shielding sheet in the embodiments of this application;

[0039] Figure 12 This is a partial structural schematic diagram of the projection tube provided in an embodiment of this application;

[0040] Figure 13 yes Figure 12 A magnified schematic diagram of the structure at point C in the middle;

[0041] Figure 14 This is a state diagram of the projection tube's insertion slot being blocked in an embodiment of this application;

[0042] Figure 15 This is a state diagram of the projection tube in an embodiment of this application when one of its insertion slots is blocked;

[0043] Figure 16 This is a state diagram of the projection tube in an embodiment of this application when the other insertion slot is blocked;

[0044] Figure 17 This is a schematic diagram of the projection tube insertion slot in the embodiment of this application when it is in use.

[0045] Explanation of key figure labels:

[0046] 100. Cylinder body; 101. Light-shielding assembly; 102. Light inlet; 103. Light outlet; 104. Insertion slot; 104a. First insertion slot; 104b. Second insertion slot; 105. Front housing; 106. Middle housing; 107. Rear housing; 108. First flange; 109. Second flange; 110. Retaining ring; 111. Shaft head; 112. Shaft shoulder; 113. Light cutter; 114. Light-shielding plate; 114a. First light-shielding plate; 114b. Second light-shielding plate; 115. Fastener; 116. Strip-shaped through hole; 117. Blocking part; 118. Connecting part; 119. Limiting plate; 120. First through hole; 121. Positioning pin; 122. First mounting hole; 123. Second mounting hole; 124. Elastic element; 125. Locking screw;

[0047] 201. Aperture; 202. Slide. Detailed Implementation

[0048] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0049] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0050] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0052] To illustrate the technical solutions described in this application, the following detailed description is provided in conjunction with specific drawings and embodiments.

[0053] In related technologies, to achieve various lighting effects in LED or photographic lighting, a projection tube is often added to the LED light or photographic light. Removable light effect components of different types, including apertures and / or slides, are installed in the insertion slots of the projection tube's body to create diverse lighting effects to meet specific needs. However, in actual use, after the projection tube body is combined with the removable light effect components, light leakage can occur in the unused insertion slots on the tube body, resulting in the projection effect of the projection tube not meeting expectations.

[0054] Therefore, this application provides a projection tube to solve the problems in the related technology; the projection tube provided in this application will be described in detail below with reference to the accompanying drawings.

[0055] Combination Figures 1 to 4As shown, in one or more embodiments, the projection tube provided in this application includes: a tube body 100 and a light-shielding assembly 101; the tube body 100 has an optical channel with a light inlet 102 and a light outlet 103, the light inlet 102 is used to connect to a light source, and the tube body 100 is provided with a plurality of insertion slots 104, which are connected to the optical channel; the light-shielding assembly 101 is mounted on the tube body 100, and the light-shielding assembly 101 includes a plurality of light-shielding plates 114, which are used to block the insertion slots 104.

[0056] The projection tube provided in this application embodiment has multiple insertion slots 104 on the tube body 100, in which an aperture 201 or a projection sheet 202 can be inserted. Since there are multiple insertion slots 104, both an aperture 201 and a projection sheet 202 can be inserted into the tube body 100 simultaneously to meet the needs of different application scenarios. Because the insertion slots 104 are connected to the optical channel, when the light inlet 102 is connected to the light source, and when no aperture 201 or projection sheet 202 is installed in the insertion slot 104, light may escape from the insertion slot 104, causing light leakage into the tube body 100. The light-shielding sheet 114 can block unused insertion slots 104, thereby reducing light leakage and ensuring the projection effect of the projection tube.

[0057] In some embodiments, the projection sheet 202 is a patterned structural component. When light passes through the projection sheet 202, the pattern on it can be projected onto a solid structure such as a wall or screen. The optical channel allows the light source to enter from the light inlet 102 and exit from the light outlet 103. The light source can be an external light source, meaning it may not be part of the projection tube. It is understood that in some other possible embodiments, the light source may also be part of the projection tube. The light source and the tube 100 are detachably connected, for example, by a snap-fit ​​connection or a threaded connection, as long as the connection between the light source and the tube 100 can be achieved. Since there are multiple insertion slots 104 and multiple light-shielding plates 114, the light-shielding plates 114 can selectively block one or more of the multiple insertion slots 104. In addition, the specific size or structure of different insertion slots 104 can be the same or different, and the size or structure of the insertion slot 104 is adapted to the corresponding aperture 201 or projection sheet 202. Different light-shielding sheets 114 can have the same structure, or they can have different sizes or structural forms. As long as they can block the insertion slot 104, they can all be called light-shielding sheets 114. The light-shielding sheets 114 are made of opaque material.

[0058] Combination Figures 1 to 4As shown, in some embodiments, the cylinder 100 includes a front shell 105, a middle shell 106, and a rear shell 107. The front shell 105 and the middle shell 106 are inserted together, and the rear shell 107 is rotatably connected to the middle shell 106. An insertion slot 104 is disposed on the middle shell 106, a light outlet 103 is disposed on the front shell 105, and a light inlet 102 is disposed on the rear shell 107. The front shell 105 can move relative to the middle shell 106 along a first direction, so that the cylinder 100 can extend and retract. The first direction is parallel to the length direction of the cylinder 100. The middle shell 106 can rotate relative to the rear shell 107. By utilizing the linear movement of the front shell 105 relative to the middle shell 106, the extension and retraction of the cylinder 100 can be achieved, which can realize the focusing of light or the change of the size of the projected pattern. The rotation of the middle shell 106 relative to the rear shell 107 can realize the adjustment of the projected pattern to be upright or inverted.

[0059] For ease of description, the length direction of the cylinder 100 is the AA direction; exemplarily, the front shell 105, the middle shell 106, and the rear shell 107 are arranged sequentially along the length direction of the cylinder 100. A lens assembly is installed in the front shell 105 to magnify the projection; the lens assembly is something that those skilled in the art should understand, is well-known and easily implemented by those skilled in the art, and is not related to the purpose of this application, therefore, the embodiments of this application will not be described in detail. The front shell 105 is inserted into the middle shell 106, which has an elongated through hole. The length direction of the elongated through hole is parallel to the length direction of the cylinder 100. The projection cylinder also includes a locking screw 125, which passes through the elongated through hole to be threadedly connected to the front shell 105. In this way, the elongated through hole allows the front shell 105 and the locking screw 125 to move together along the length direction of the cylinder 100, thereby changing the length of the cylinder 100 and thus achieving the extension and retraction of the cylinder 100.

[0060] Combination Figures 4 to 7As shown, the rear housing 107 and the middle housing 106 are rotatably connected by a rotating assembly. The rotating assembly includes a first annular flange 108, a second annular flange 109, and a retaining ring 110. The first flange 108 is fixedly connected to the middle housing 106 by screws. The first flange 108 is also fixedly connected to the retaining ring 110 by screws. The retaining ring 110 includes a shaft head 111 and a shoulder 112 fixedly connected to the shaft head 111. The outer diameter of the shaft head 111 is smaller than the outer diameter of the shoulder 112. The second flange 109 is sleeved on the shaft head 111. Since the outer diameter of the shaft head 111 is smaller than the outer diameter of the shoulder 112, the second flange 109 is axially limited by the first flange 108 and the shoulder 112 after being sleeved on the shaft head 111. The second flange 109 is fixedly connected to the rear housing 107 by screws. Since the second flange 109 can rotate around the axis of the retaining ring 110 on the shaft head 111, the middle housing 106 and the front housing 105 can rotate together relative to the rear housing 107. It should be noted that in some other possible implementations, the rotating assembly may also adopt other forms of structure, such as using bearings to achieve the rotational connection between the rear housing 107 and the middle housing 106.

[0061] In some embodiments, the projection tube further includes a light cutter 113, which is inserted into the tube body 100. The light cutter 113 can block light in a set manner to form different projection shapes and enhance the light effect. For example, the light cutter 113 is inserted into the middle housing 106.

[0062] See Figure 1 As shown, in some embodiments, at least two of the plurality of insertion slots 104 are spaced apart along the length of the cylindrical body 100, which facilitates the implementation of light effect components, such as the aperture 201 and the projection sheet 202, along the length of the cylindrical body 100. Exemplarily, the number of insertion slots 104 can be 2, 3, 4, 5, 6, or 7, etc. This application takes the number of insertion slots 104 as an example for specific illustration. From the front housing 105 to the rear housing 107, the two insertion slots 104 are respectively the first insertion slot 104a and the second insertion slot 104b.

[0063] It should be noted that in some other possible embodiments, at least two of the multiple insertion slots 104 may be distributed circumferentially around the cylindrical body 100. This allows for the installation of more light effect components on the cylindrical body 100. For example, two, three, or four insertion slots may be distributed circumferentially around the cylindrical body 100; this application does not impose a specific limitation. Furthermore, in some other possible embodiments, a portion of the multiple insertion slots 104 may be distributed circumferentially around the cylindrical body 100, while the remaining portion may be spaced apart along the length of the cylindrical body 100; or, a portion of the multiple insertion slots 104 may be spaced apart along the length of the cylindrical body 100, and this portion of the insertion slots 104 may be distributed circumferentially around the cylindrical body 100.

[0064] Combination Figure 2 , Figure 8 and Figure 9 As shown, in some embodiments, multiple light-shielding sheets 114 are stacked together. The light-shielding sheets 114 are movable along the length of the cylinder 100, allowing for independent movement among the multiple light-shielding sheets 114 and facilitating different light-shielding sheets 114 to cover different insertion slots 104 for shielding. For example, multiple light-shielding sheets 114 are stacked along the radial direction of the cylinder 100, while the axial direction of the cylinder 100 is its length direction.

[0065] In some embodiments, the light-shielding sheet 114 is made of steel, aluminum alloy, or plastic; it is understood that the light-shielding sheet 114 may also be made of stainless steel, aluminum, or copper. The light-shielding sheet 114 may be manufactured by a stamping process, for example, the light-shielding sheet 114 may be stamped from SPCC (cold-rolled carbon steel sheet).

[0066] In some embodiments, the number of light-shielding plates 114 is equal to the number of insertion slots 104, so that each insertion slot 104 corresponds to a light-shielding plate 114. For example, the number of light-shielding plates 114 can be 2, 3, 4, 5, 6 or 7, etc. This application takes the number of light-shielding plates 114 as an example for specific description; the two light-shielding plates 114 are a first light-shielding plate 114a and a second light-shielding plate 114b, the first light-shielding plate 114a is located between the second light-shielding plate 114b and the outer surface of the cylinder 100, that is, the first light-shielding plate 114a is located between the second light-shielding plate 114b and the outer surface of the middle shell 106.

[0067] In some embodiments, at least one of the plurality of light-shielding plates 114 can simultaneously block multiple adjacent insertion slots 104, for example, simultaneously blocking two or three adjacent insertion slots 104, while the other light-shielding plates 114 can only block one insertion slot 104. For example, the first light-shielding plate 114a can simultaneously block two insertion slots 104, that is, the first light-shielding plate 114a can simultaneously block the first insertion slot 104a and the second insertion slot 104b.

[0068] It should be noted that in some other possible implementations, among the multiple light-shielding plates 114, each light-shielding plate 114 may only block one insertion slot 104.

[0069] In some embodiments, the light-shielding sheet 114 is detachably connected to the cylinder 100, which facilitates manufacturing and assembly.

[0070] Combination Figure 2 , Figure 8 and Figure 9 As shown, in some embodiments, the light-shielding assembly 101 further includes a fastener 115 for mounting the light-shielding sheet 114 onto the cylindrical body 100. The light-shielding sheet 114 has a strip-shaped through-hole 116, through which the fastener 115 passes to securely connect with the cylindrical body 100. The light-shielding sheet 114 is configured to be movable along the length of the strip-shaped through-hole 116. Multiple light-shielding sheets 114 can be mounted onto the cylindrical body 100 using the fastener 115. For example, the fastener 115 is detachably connected to the middle housing 106, which facilitates assembly; the fastener 115 can be a screw, which is threadedly connected to the middle housing 106, thereby realizing the threaded connection between the screw and the cylinder 100; since each light-shielding plate 114 has a strip-shaped through hole 116, all the light-shielding plates 114 can be installed on the cylinder 100 after the fastener 115 passes through the strip-shaped through hole 116 on each light-shielding plate 114; the length direction of the strip-shaped through hole 116 is parallel to the length direction of the cylinder 100.

[0071] Combination Figure 2 , Figure 8 and Figure 9 As shown, in some embodiments, the light-shielding plate 114 includes a blocking portion 117 and a connecting portion 118. A connecting portion 118 is fixedly connected to each end of the blocking portion 117 along its length. A strip-shaped through hole 116 is formed in the connecting portion 118, thus enabling the light-shielding plate 114 to move smoothly along the length of the cylinder 100 using the two connecting portions 118. The blocking portion 117 can cover the opening of the insertion slot 104, thereby blocking the insertion slot 104. For example, in combination with... Figure 10 and Figure 11As shown, the width d1 of the blocking portion 117 of the first light-shielding plate 114a in the length direction of the cylinder 100 is greater than the width d2 of the blocking portion 117 of the second light-shielding plate 114b in the length direction of the cylinder 100. Thus, the first light-shielding plate 114a can block the wider first insertion slot 104a and also the narrower second insertion slot 104b. The second light-shielding plate 114b is used to block the second insertion slot 104b. The width direction of the insertion slot 104 is parallel to the length direction of the cylinder 100. Therefore, by using the first light-shielding plate 114a and the second light-shielding plate 114b, the light-shielding requirements of either the aperture 201 or the projection sheet 202 can be simultaneously met.

[0072] It should be noted that in some other possible embodiments, in order to facilitate the operation of the light-shielding sheet 114, the light-shielding sheet 114 may also include a handle. By pulling the handle, the light-shielding sheet 114 can be moved along the length direction of the cylinder 100. The handle can be fixed on the connecting part 118 or fixed on the blocking part 117. The handle can be a sheet-like structure, and the sheet-like structure is set perpendicular to the outer surface of the cylinder 100.

[0073] Combination Figure 2 , Figure 8 , Figure 9 , Figure 12 and Figure 13 As shown, in some embodiments, the light-shielding assembly 101 further includes a limiting piece 119, which has a first through hole 120 and a positioning post 121. The positioning post 121 passes through the strip-shaped through hole 116 to be inserted into the cylinder 100, and the fastener 115 passes through the first through hole 120 and the strip-shaped through hole 116 in sequence to be fixedly connected to the cylinder 100. With the cooperation of the positioning post 121 and the fastener 115, the light-shielding piece 114 can be moved along the length direction of the strip-shaped through hole 116, ensuring that the light-shielding piece 114 slides smoothly and will not warp or get stuck. For example, the middle shell 106 has a first mounting hole 122 and a second mounting hole 123, which are spaced apart along the length of the cylinder 100; the positioning post 121 is inserted into the first mounting hole 122, and the positioning post 121 and the first mounting hole 122 can be clearance-fitted; the second mounting hole 123 is a threaded hole, so that when the fastener 115 is a screw, the screw can be threadedly engaged with the second mounting hole 123.

[0074] In some embodiments, the light-shielding assembly 101 further includes an elastic element 124 located between the limiting piece 119 and the head of the screw. The elastic element 124 can be used to adjust the tightness of the light-shielding piece 114 on the cylinder 100. For example, the elastic element 124 is a spring; the spring is sleeved on the screw shank.

[0075] It should be noted that in some other possible implementations, the elastic element 124 may also be a spring washer.

[0076] In some embodiments, among the plurality of insertion slots 104, at least one insertion slot 104 is used for removably mounting the aperture 201, and at least one insertion slot 104 is used for removably mounting the projection sheet 202; wherein, when the aperture 201 and / or the projection sheet 202 are removed, one or more light-shielding sheets 114 can be moved to the insertion slot 104 corresponding to the aperture 201 and / or the projection sheet 202 to provide shading. For example, when there are two insertion slots 104, one insertion slot 104 is used for removably mounting the aperture 201, and the other insertion slot 104 is used for removably mounting the projection sheet 202. For example, the first insertion slot 104a is used to mount the aperture 201, and the second insertion slot 104b is used to mount the projection sheet 202.

[0077] It should be noted that in some other possible implementations, the first insertion slot 104a may also be designed to install the slide 202, while the second insertion slot 104b may be designed to install the aperture 201.

[0078] The working principle of the light-shielding component 101 of the projection tube provided in this application embodiment is as follows:

[0079] 1. See Figure 14 As shown, when all the insertion slots 104 of the projection tube are not fitted with light effect components, such as aperture 201 and projection sheet 202, the light shielding plate 114 of the light shielding component 101 blocks all the insertion slots 104, that is, the first light shielding plate 114a and the second light shielding plate 114b block the first insertion slot 104a and the second insertion slot 104b.

[0080] 2. When a light effect component is installed in one slot 104 of the projection tube, but not in the other slot 104, one of the light-shielding plates 114 can be used to block the slot 104 without the light effect component; for example, see Figure 15 As shown, when the aperture 201 is inserted into the first insertion slot 104a and the projection sheet 202 is not installed in the second insertion slot 104b (i.e., the second insertion slot 104b is empty), the first light-shielding plate 114a can remain stationary while the second light-shielding plate 114b is moved to the second insertion slot 104b to block the second insertion slot 104b. See also Figure 16 As shown, when the aperture 201 is not installed in the first insertion slot 104a (i.e., the first insertion slot 104a is empty) and the projection sheet 202 is installed in the second insertion slot 104b, the first light-shielding sheet 114a can be moved to the first insertion slot 104a to block the first insertion slot 104a.

[0081] 3. When a light effect component is installed in one insertion slot 104 of the projection tube and another insertion slot 104 is installed with a light effect component, the two light-shielding plates 114 can be kept in different initial positions; for example, see Figure 17 As shown, when the aperture 201 is inserted in the first insertion slot 104a and the projection sheet 202 is installed in the second insertion slot 104b, the positions of the first light-shielding sheet 114a and the second light-shielding sheet 114b can be kept unchanged at the same time.

[0082] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A projection tube, characterized in that, include: A cylindrical body (100) has an optical channel with a light inlet (102) and a light outlet (103) opposite to each other. The light inlet (102) is used to connect to a light source. The cylindrical body (100) is provided with a plurality of insertion slots (104) that are connected to the optical channel. A light-shielding assembly (101) is mounted on the cylindrical body (100). The light-shielding assembly (101) includes a plurality of light-shielding plates (114) for blocking the insertion slot (104).

2. The projection tube as described in claim 1, characterized in that, At least two of the plurality of insert slots (104) are spaced apart along the length of the cylinder (100).

3. The projection tube as described in claim 1, characterized in that, Multiple light-shielding sheets (114) are stacked together, and the light-shielding sheets (114) can move along the length direction of the cylinder (100).

4. The projection tube as described in any one of claims 1-3, characterized in that, The light-shielding assembly (101) further includes a fastener (115) for mounting the light-shielding sheet (114) onto the cylinder (100); The light-shielding plate (114) has a strip-shaped through hole (116), and the fastener (115) passes through the strip-shaped through hole (116) to be fixedly connected to the cylinder (100). The light-shielding plate (114) is configured to be movable along the length direction of the strip-shaped through hole (116).

5. The projection tube as described in claim 4, characterized in that, The light-shielding assembly (101) further includes a limiting piece (119), which has a first through hole (120) and a positioning post (121); The positioning pin (121) passes through the strip-shaped through hole (116) to be inserted into the cylinder (100), and the fastener (115) passes through the first through hole (120) and the strip-shaped through hole (116) in sequence to be fixedly connected to the cylinder (100).

6. The projection tube as described in claim 5, characterized in that, The fastener (115) is a screw, which is threadedly connected to the cylinder (100); The light-shielding assembly (101) also includes an elastic element (124) located between the limiting piece (119) and the head of the screw.

7. The projection tube as described in any one of claims 1-3, characterized in that, At least one of the plurality of light-shielding plates (114) is capable of blocking two or more of the insert slots (104) simultaneously.

8. The projection tube as described in any one of claims 1-3, characterized in that, The material of the light-shielding sheet (114) is steel, aluminum alloy or plastic; the number of the light-shielding sheets (114) is equal to the number of the insertion slots (104).

9. The projection tube as described in any one of claims 1-3, characterized in that, At least two of the plurality of insert slots (104) are distributed circumferentially around the cylinder (100).

10. The projection tube as described in any one of claims 1-3, characterized in that, The cylindrical body (100) includes a front shell (105), a middle shell (106) and a rear shell (107). The front shell (105) and the middle shell (106) are inserted together, and the rear shell (107) and the middle shell (106) are rotatably connected. The insertion slot (104) is disposed on the middle shell (106), the light outlet (103) is disposed on the front shell (105), and the light inlet (102) is disposed on the rear shell (107). The front housing (105) is movable relative to the middle housing (106) in a first direction so that the cylinder (100) can extend and retract, the first direction being parallel to the length direction of the cylinder (100); the middle housing (106) is rotatable relative to the rear housing (107).

11. The projection tube as described in any one of claims 1-3, characterized in that, Of the plurality of said insert slots (104), one insert slot (104) is used for removably mounting an aperture (201), and another insert slot (104) is used for removably mounting a slide (202); When the aperture (201) and / or the projection sheet (202) are disassembled, one or more of the light-shielding sheets (114) can be moved to the insertion slot (104) corresponding to the aperture (201) and / or the projection sheet (202) for blocking.

12. The projection tube as described in any one of claims 1-3, characterized in that, The projection tube also includes a light cutter (113), which is inserted into the tube body (100).

Images