Laser projection device

Abstract

The utility model provides a laser projection device. The laser projection device comprises a radiator, a main positioning sheet arranged on the radiator and a grating sheet fixed on the main positioning sheet. A sliding block is formed at the bottom of the main positioning sheet; a slave positioning piece is arranged in the radiator, and a sliding groove is formed in the slave positioning piece; the sliding block is arranged to slide in the sliding groove, and when the sliding block slides to the end point of the sliding groove, the auxiliary positioning piece is pushed to rotate relative to the radiator. The grating sheet can be used for arranging more images, so that the laser projection device can project more specific patterns.

Description

Technical Field

[0001] The utility model relates to the technical field of projection, in particular to a laser projection device. Background Art

[0002] At present, according to market demand, some laser projection devices need to project some specific patterns. When presenting images, laser projection devices often use laser emitters to illuminate grating sheets so as to transmit patterns on the grating sheets, such as star patterns, to the target wall or curtain. On this basis, in order to achieve the moving effect of the star pattern, it is usually necessary to set a rotating part, on which one or more grating sheets are arranged. The grating sheets can rotate with the rotating part. The laser emitted by the laser emitter will form a movable star pattern projection on the receiving surface after diffraction by the rotating grating sheet, thereby enriching the visual effect of the projection light.

[0003] In the prior art, the rotation angle of the rotating member in the same direction is usually less than 360 degrees. Since the rotating member drives the grating sheet to rotate synchronously, the rotation angle of the grating sheet is also smaller, and accordingly, the grating sheet has fewer patterns of the same size. Therefore, the laser projection device presents fewer images, which limits the application scenarios of the laser projection device.

[0004] In addition, in the prior art, when installing a grating sheet in a laser projection device, the grating sheet is usually installed on a rotating part by visual alignment. Since the laser projection device lacks positioning components, misalignment and reverse installation are prone to occur during the installation process, reducing the installation efficiency of the grating sheet. Utility Model Content

[0005] The purpose of the utility model is to solve the above problems and provide a laser projection device.

[0006] In order to meet the purpose of the utility model, the utility model adopts the following technical solutions:

[0007] The utility model provides a laser projection device, comprising a heat sink, a main positioning plate arranged on the heat sink, and a grating plate fixed on the main positioning plate; the characteristic is that a slider is formed at the bottom of the main positioning plate; a slave positioning plate is arranged in the heat sink, and a slide groove is provided on the slave positioning plate; the slider is arranged to slide in the slide groove and push the slave positioning plate to rotate relative to the heat sink when sliding to the end point of the slide groove.

[0008] In one embodiment, a mounting hole is provided on the heat sink; a pivot is provided on the main positioning plate, and the pivot passes through the grating plate, the main positioning plate and the mounting hole in sequence; the slider is configured to slide in the slide groove and push the slave positioning plate to rotate around the pivot relative to the heat sink when sliding to the end point of the slide groove.

[0009] In one embodiment, the edge of the slave positioning plate is provided with a retaining rib protruding from its edge surface; the heat sink is provided with a positioning rib; the positioning rib is configured to limit the rotation range of the slave positioning plate relative to the heat sink by blocking the retaining rib.

[0010] In one embodiment, the upper surface of the main positioning plate is provided with positioning protrusions, and the grating plate is provided with positioning holes matching the positioning protrusions, and the positioning protrusions are embedded in the positioning holes to install and fix the grating plate on the main positioning plate.

[0011] In one embodiment, a limiting portion for limiting the sliding range of the slider is provided in the sliding groove.

[0012] In one embodiment, the positioning protrusions include circular protrusions and square protrusions.

[0013] In one embodiment, it also includes a motor, which has a rotating shaft. The rotating shaft has a step drive shaft and a polygonal rotating shaft. The polygonal rotating shaft matches the polygonal shaft hole of the main positioning plate, and the step drive shaft matches the cylindrical shaft hole of the slave positioning plate. The polygonal rotating shaft is inserted into the polygonal shaft hole to drive the main positioning plate to rotate under the drive of the motor.

[0014] In one embodiment, the main positioning plate includes a bearing portion for supporting the grating plate and a supporting portion arranged at the bottom of the bearing portion, and the polygonal axial hole passes through the supporting portion and the bearing portion.

[0015] In one embodiment, a sensing component is disposed on the heat sink for controlling the motor to stop running when the clamping rib rotates to contact the positioning rib.

[0016] In one embodiment, the sensing component includes a sensing device and a circuit board, a detection notch is provided at the edge of the circuit board, and sensing devices are respectively arranged at positions above and below the surface of the circuit board close to the detection notch; the circuit board and the grating sheet are perpendicular to each other, and the outer edge of the grating sheet can rotate through the detection notch.

[0017] Compared with the prior art, the beneficial technical effects of the utility model are as follows:

[0018] The laser projection device provided by the utility model is provided with a slider on the main positioning piece and a slide groove on the slave positioning piece, and the slider slides within a larger angle range in the slide groove, and when the slider slides to the end point of the slide groove, it pushes the slave positioning piece to rotate relative to the radiator, so that the slider and the main positioning piece rotate synchronously, and since the grating piece is fixed on the main positioning piece, the main positioning piece can drive the grating piece to rotate synchronously, and drive the grating piece to rotate more than the angle between the two end points of the slide groove. Therefore, compared with the deficiency that the rotating structure inside the traditional laser projection device can only drive the grating piece to rotate one circle, the grating piece of the utility model can rotate more than one circle (that is, more than 360 degrees) under the mutual cooperation of the main positioning piece and the slave positioning piece under the drive of the motor. After the rotation angle range of the grating piece is increased, more images can be arranged, so that the laser projection device can project more specific patterns, thereby increasing the application scenarios of the laser projection device and meeting the various needs of users.

[0019] Additional aspects and advantages of the present invention will be partially given in the following description, which will become apparent from the following description or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0021] Figure 1 It is a schematic diagram of the exploded structure of the internal components of the laser projection device of the present utility model.

[0022] Figure 2 It is a partial structural schematic diagram of the laser projection device of the present utility model.

[0023] Figure 3 The utility model is a schematic diagram of the structure of the main positioning piece and the slave positioning piece of the laser projection device.

[0024] Figure 4 The utility model is a schematic diagram of the motor shaft structure of the laser projection device.

[0025] Figure 5 It is a schematic diagram of the structure of the sensor component of the laser projection device of the present utility model.

[0026] Figure 6 This is a schematic diagram of the assembly structure of some components inside the laser projection device of the present utility model. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention and cannot be interpreted as limiting the present invention.

[0028] It will be understood by those skilled in the art that, unless expressly stated, the singular forms "one", "said", and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present utility model refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or their groups. It should be understood that when we say that an element is "connected" or "coupled" to another element, it can be directly connected or coupled to other elements, or there may be intermediate elements. In addition, the "connection" or "coupling" used here may include wireless connection or wireless coupling. The term "and / or" used here includes all or any unit and all combinations of one or more associated listed items.

[0029] Those skilled in the art will understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as the general understanding of ordinary technicians in the field to which the utility model belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as the meaning in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as here.

[0030] The utility model provides a laser projection device, such as Figures 1 to 6 As shown, the heat sink 1 includes a main positioning piece 31 disposed above the heat sink 1 and a grating piece 2 fixed on the main positioning piece 31; a slider 310 is formed at the bottom of the main positioning piece 31; a slave positioning piece 32 is disposed in the heat sink 1, and a slide groove 320 is provided on the slave positioning piece 32; the slider 310 is configured to slide in the slide groove 320 and push the slave positioning piece 32 to rotate relative to the heat sink 1 when sliding to the end of the slide groove 320. Specifically, the main positioning piece 31 is located on the upper surface of the heat sink 1, and the cooperation between the main positioning piece 31 and the slave positioning piece 32 is achieved by the relative sliding between the slider 310 and the slide groove 320.

[0031] Specifically, in one embodiment, refer to Figure 2 and Figure 3The heat sink 1 includes a heat sink 11, and a mounting hole 10 is longitudinally provided on the heat sink 11. The slave positioning piece 32 can be rotatably arranged below the main positioning piece 31, and is rotatably placed in the mounting hole 10. The grating piece 2 is fixed on the main positioning piece 31 and is located above the heat sink 1. The main positioning piece 31 can drive the grating piece 2 to rotate, and when the main positioning piece 31 rotates, the grating piece 2 rotates synchronously above the heat sink 1.

[0032] A slide groove 320 is provided at the side edge of the slave positioning piece 32, and the slide groove 320 is an arc-shaped notch structure, and its notch faces outward; a slider 310 is provided at the bottom of the main positioning piece 31, which protrudes from the bottom and extends into the slide groove 320 of the slave positioning piece 32. The slider 310 of the main positioning piece 31 rotates with the main positioning piece 31. The main positioning piece 31 can rotate with the slider 310 within the range limited by the two ends of the slide groove 320. After the slider 310 rotates to the end of the slide groove 320, it is blocked by the slave positioning piece 32, so the slider 310 pushes the slide groove 320 to continue to rotate in the same direction. That is, since the slave positioning piece 32 can be rotatably arranged in the mounting hole 10, when the slider 310 of the main positioning piece 31 rotates to the end of the slide groove 320, and the main positioning piece 31 continues to rotate, the slider 310 has a thrust on the end of the slide groove 320, so the main positioning piece 31 pushes the slave positioning piece 32 to continue to rotate in the mounting hole 10 of the radiator 1 with the help of the slider 310. In other embodiments, the slide groove 320 can also be opened at a non-edge portion of the slave positioning piece 32, that is, a slide groove with an arc-shaped perforated structure is opened on the slave positioning piece 32. The slider 310 of the main positioning piece 31 corresponds to the position of the slide groove 320, so as to push the slave positioning piece 32 to rotate after sliding to the end in the slide groove 320.

[0033] The purpose of the rotation of the main positioning piece 31 and the slave positioning piece 32 is to drive the grating piece 2 fixed on the main positioning piece 31 to rotate, and to limit the rotation angle range of the grating piece 2, so that the laser projection device can project a specific image. The grating piece 2, the main positioning piece 31 and the slave positioning piece 32 rotate coaxially, so a pivot 600 is provided on the main positioning piece 31, and the pivot 600 passes through the grating piece 2, the main positioning piece 31 and the mounting hole 10 in sequence; when the slider 310 slides in the slide groove 320 and slides to the end point (end) of the slide groove 320, the slider 310 continues to push the slave positioning piece 32 to rotate relative to the heat sink 1 around the pivot 600.

[0034] In one embodiment, in order to limit the rotation angle range of the grating sheet 2, the outer edge of the slave positioning sheet 32 ​​is provided with a clamping rib 321 protruding from its edge surface; corresponding to the clamping rib 321, a positioning rib 101 protruding from the inner surface is provided in the mounting hole 10 of the heat sink 1. The clamping rib 321 can rotate relative to the heat sink 1 along with the slave positioning sheet 32. When the clamping rib 321 rotates to abut against the positioning rib 101, the slave positioning sheet 32 ​​cannot rotate further due to the obstruction of the positioning rib 101, that is, the positioning rib 101 is configured to limit the rotation range of the slave positioning sheet 32 ​​relative to the heat sink 1 by blocking the clamping rib 321, thereby preventing the main positioning sheet 31 from continuing to rotate, thereby limiting the rotation angle range of the grating sheet 2.

[0035] In other embodiments, in order to limit the rotation angle range of the grating sheet 2 , a limiting portion 322 for limiting the sliding range of the slider 310 may be provided in the slide groove 320 .

[0036] In one embodiment, in combination Figure 1 and Figure 4 As shown, the laser projection device of the utility model further includes a motor 4, which includes a motor body 40 and a rotating shaft 41 connected to the motor body 40, and the rotating shaft 41 includes a step drive shaft 412 and a polygonal rotating shaft 411 extending from the top of the step drive shaft 412. Corresponding to the rotating shaft 41, the main positioning piece 31 is provided with a polygonal shaft hole 312 matching the polygonal rotating shaft 411, and the slave positioning piece 32 is provided with a cylindrical shaft hole 323 matching the step drive shaft 412. The rotating shaft 41 penetrates into the mounting hole 10 of the radiator 1 from the bottom of the radiator 1, and the polygonal rotating shaft 411 is inserted into the polygonal shaft hole 312 of the main positioning piece 31, and the step drive shaft 412 is inserted into the cylindrical shaft hole 323 of the slave positioning piece 32 to match. Since the polygonal rotating shaft 412 and the polygonal shaft hole 312 are mutually fixed, when the polygonal rotating shaft 412 rotates, the main positioning piece 31 will be driven to rotate synchronously. Since the stepped driving shaft 412 is cylindrical in shape, it cannot drive the slave positioning piece 32 to rotate. Therefore, the motor 4 is inserted into the polygonal shaft hole 312 of the main positioning piece 31 through the polygonal rotating shaft 312 of the rotating shaft 41 to drive the main positioning piece 31 to rotate.

[0037] When the motor 4 drives the main positioning plate 31 to drive the positioning plate 32 to rotate to the positioning rib 101 in the mounting hole 10 of the radiator 1, the working state of the motor 4 is stuck due to the obstruction of the positioning rib 101. Therefore, this state can be set as the starting state, that is, the zero point state.

[0038] In the initial state, the motor 4 drives the main positioning plate 31 to start rotating the grating plate 2. At the same time, the main positioning plate 31 slides the slider 310 in the slide groove 320 of the slave positioning plate 32 until the slider 310 rotates to the end of the slide groove 320. At this time, the grating plate 2 has rotated to an angle corresponding to the arc of the slide groove 320. From the end of the slide groove 320, the slider 310 of the main positioning plate 31 continues to push the slave positioning plate 32 to continue rotating until the slave positioning plate 32 is blocked by the positioning rib 101 in the heat sink 1. In this process, the main positioning plate 31 drives the grating plate 2 to continue rotating for almost one circle. Therefore, under the mutual cooperation of the main positioning plate 31, the slave positioning plate 32 and the heat sink positioning rib 101, the rotation angle of the grating plate 2 exceeds one circle. Compared with the traditional laser projection device for selecting a specific pattern, the rotation angle range of the grating plate 2 is increased, so that the grating plate 2 can arrange more patterns, so that the laser projection device of the utility model can project and present more specific images.

[0039] The upper surface of the main positioning plate 31 is provided with a positioning protrusion 311, and the grating plate 2 is provided with a positioning hole 20 matching the positioning protrusion 311. The positioning protrusion 311 is embedded in the positioning hole 20 to install and fix the grating plate 2 on the main positioning plate 31. The setting of the positioning protrusion 311 allows the operator to position the grating plate 2 to a relative position with the main positioning plate 13 through the positioning protrusion 311 when installing the grating plate 2. In one embodiment, the positioning protrusion 311 also includes a circular protrusion and a square protrusion. The grating plate 2 is provided with corresponding circular hole positioning holes and square positioning holes. Through the cooperation of the circular protrusion and the square protrusion, when installing the grating plate 2, the operator must align the two positioning holes 20 of the grating plate 2 with the two positioning protrusions on the upper surface of the main positioning plate 31 to assemble it in place. The accuracy of the installation of the grating plate 2 is determined by the two positioning points of different shapes to prevent the situation of reverse installation and wrong installation, which leads to the need for rework.

[0040] After the grating sheet 2 is fixed to the upper surface of the main positioning sheet 31, screws 5 are respectively inserted from the top of the grating sheet 2 through the grating sheet 2 and the main positioning sheet 31 into the fixing holes 410 at the top of the rotating shaft 41 of the motor 4, and the grating sheet 2, the main positioning sheet 31 and the slave positioning sheet 32 ​​are locked on the radiator 1, and the aforementioned pivot 600 is formed between the grating sheet 2, the main positioning sheet 31 and the mounting hole 10. The slave positioning sheet 32 ​​is fixed to the mounting hole 10 of the radiator 1 by the mutual locking of the screws 5 and the rotating shaft 41, and the grating sheet 2 is fixed to the upper surface of the radiator 1, and the main positioning sheet 31 is located between the grating sheet 2 and the slave positioning sheet 32. In the above, the main positioning sheet 31, the slave positioning sheet 32 ​​and the motor 4 are set as a set of rotating mechanisms, and a mounting hole 10 is opened corresponding to the radiator 1. In some embodiments, the laser projection device can be provided with multiple grating sheets 2 according to the requirements of different projection images, and each grating sheet 2 is correspondingly provided with a set of rotating mechanisms and corresponding mounting holes 10. Reference Figure 6 The plurality of grating sheets 2 can be partially overlapped on the upper surface of the heat sink 1 by setting different heights thereof, or can be flatly distributed on the upper surface of the heat sink 1 .

[0041] In one embodiment, reference Figure 3 , the main positioning piece 31 may also include a bearing portion 314 for supporting the grating sheet 2 and a supporting portion 315 arranged at the bottom of the bearing portion 314. The radius of the supporting portion 315 is smaller than the radius of the bearing portion 314, and the slider 310 is formed by protruding from the bottom of the bearing portion 314. When the main positioning piece 31 is installed on the radiator 1, its bearing portion 314 is located above the radiator 1, and the supporting portion 315 can be partially or completely placed in the mounting hole 10 of the radiator 1. In this embodiment, the polygonal shaft hole 312 passes through the supporting portion 314 and the bearing portion 315. As the height of the polygonal shaft hole 312 increases, the height of the corresponding polygonal rotating shaft 411 increases accordingly, so that the contact area between the rotating shaft 41 and the main positioning piece 31 is larger, and it is not easy to damage the contacting part of the two due to excessive friction. The motor 4 drives the main positioning piece 31 to rotate more stably, thereby making the rotation of the grating sheet 2 more stable. In one embodiment, a sensing component 35 is provided on the heat sink 1 for sensing the state when the clamping rib 321 rotates to contact the positioning rib 101, so as to control the motor 4 to stop running and set this state as the starting state.

[0042] The sensing component 35 includes a sensing device 351 and a circuit board 352. In one embodiment, a detection notch 3520 is provided at the edge of the circuit board 352, and sensing devices 3510 are respectively provided at the upper and lower positions of the circuit board 352 surface near the detection notch 3520; the circuit board 352 and the grating sheet 2 are perpendicular to each other, and the outer edge of the grating sheet 2 can rotate through the detection notch 3520. In other embodiments, the positions of the circuit board 352 and the sensing device 351 can be determined according to specific needs, and are not limited to this embodiment.

[0043] The laser projection device of the present invention further comprises a laser 6, a mounting plate 7, a main circuit board 8 and a housing (not shown) for sealing the aforementioned related components.

[0044] The laser 6 is used to emit a laser beam, the main circuit board 8 is used to control the operation of electronic devices such as the motor 4, the laser 6 and the induction component 35, and the mounting plate 7 is used to mount the aforementioned components together.

[0045] In summary, the laser projection device provided by the utility model can rotate the grating sheet 2 fixed to the main positioning sheet 31 and capable of synchronous rotation for more than one circle under the drive of the motor through the mutual cooperation of the main positioning sheet 31 and the slave positioning sheet 32. Compared with the grating sheet of the traditional laser projection device which can only rotate one circle, the rotation range of the grating sheet 2 of the utility model is increased, so more images can be arranged, so that the laser projection device can project more specific patterns. In addition, the application scenarios of the laser projection device are increased, meeting the various needs of users.

[0046] Those skilled in the art will appreciate that the various operations, methods, steps, measures, and schemes in the processes discussed in this application may be alternated, altered, combined, or deleted. Further, other steps, measures, and schemes in the various operations, methods, and processes discussed in this application may also be alternated, altered, rearranged, decomposed, combined, or deleted. Further, the steps, measures, and schemes in the prior art that are similar to those disclosed in this application may also be alternated, altered, rearranged, decomposed, combined, or deleted.

[0047] The above description is only a partial implementation method of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A laser projection device, comprising a heat sink, a main positioning plate disposed on the heat sink, and a grating plate fixed on the main positioning plate; characterized in that: A slider is formed at the bottom of the main positioning piece; a slave positioning piece is arranged in the radiator, and a slide groove is provided on the slave positioning piece; the slider is arranged to slide in the slide groove and push the slave positioning piece to rotate relative to the radiator when sliding to the end point of the slide groove.

2. The laser projection device according to claim 1, characterized in that: The heat sink is provided with a mounting hole, and the slave positioning piece is arranged in the mounting hole; the main positioning piece is provided with a pivot, and the pivot passes through the grating piece, the main positioning piece and the mounting hole in sequence; the slider is configured to slide in the slide groove and push the slave positioning piece to rotate relative to the heat sink around the pivot when sliding to the end point of the slide groove.

3. The laser projection device according to claim 2, characterized in that: The edge of the slave positioning piece is provided with a clamping rib protruding from its edge surface; the heat sink is provided with a positioning rib; the positioning rib is configured to limit the rotation range of the slave positioning piece relative to the heat sink by blocking the clamping rib.

4. The laser projection device according to claim 1, characterized in that: The upper surface of the main positioning plate is provided with positioning protrusions, and the grating plate is provided with positioning holes matching the positioning protrusions. The positioning protrusions are embedded in the positioning holes to install and fix the grating plate on the main positioning plate.

5. The laser projection device according to claim 4, characterized in that: The positioning convex points include circular convex points and square convex points.

6. The laser projection device according to claim 1, characterized in that: A limiting portion for limiting the sliding range of the sliding block is arranged in the sliding groove.

7. The laser projection device according to claim 3, characterized in that: It also includes a motor, which has a rotating shaft. The rotating shaft has a step drive shaft and a polygonal rotating shaft. The polygonal rotating shaft matches the polygonal shaft hole of the main positioning plate, and the step drive shaft matches the cylindrical shaft hole of the slave positioning plate. The polygonal rotating shaft is inserted into the polygonal shaft hole to drive the main positioning plate to rotate under the drive of the motor.

8. The laser projection device according to claim 7, characterized in that: The main positioning plate comprises a bearing portion for supporting the grating plate and a supporting portion arranged at the bottom of the bearing portion, and the polygonal axial hole passes through the supporting portion and the bearing portion.

9. The laser projection device according to claim 7, characterized in that: The heat sink is provided with a sensing component for controlling the motor to stop running when the clamping rib rotates to contact the positioning rib.

10. The laser projection device according to claim 9, characterized in that: The sensing component includes a sensing device and a circuit board. A detection notch is provided at the edge of the circuit board, and sensing devices are respectively arranged at positions above and below the surface of the circuit board close to the detection notch. The circuit board and the grating sheet are perpendicular to each other, and the outer edge of the grating sheet can rotate through the detection notch.

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