Laser projection device

Abstract

The utility model provides a laser projection device. The laser projection device comprises a laser assembly; the heat dissipation assembly comprises a fixing plate, and the laser assembly is arranged on the fixing plate; the heat dissipation assembly further comprises a top heat-conducting fin located above the fixing plate, a side heat-conducting fin formed by bending the tail end of the top heat-conducting fin towards the direction of the fixing plate, and a heat dissipation frame installed on the top of the top heat-conducting fin. The side heat-conducting fins are located on the outer sides of the side faces of the laser assembly. The laser projection device provided by the utility model has the effects of fast heat dissipation and stable projection performance.

Description

Technical Field

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

[0002] At present, with the development of projection technology, the industry uses laser as a projection light source. This is because laser has many advantages such as high brightness and wide color gamut. Therefore, laser projection devices using laser as the light source are widely used. Laser projection devices generally include laser light source components and optical mechanical components. These components will generate heat during operation. The operating temperature of the laser light source component of the laser projection device is relatively high, and the temperature of other components of the laser light source component, such as the light-transmitting mirror and other devices, will also rise rapidly. During the operation of the laser projection device, the laser light source components have certain restrictions on the temperature. If the temperature is too high, it will affect the working efficiency of the laser light source component and may even damage the laser light source component. For example, when the temperature is too high, the light-transmitting mirror will be deformed, causing the optical path of the laser light source component to fail to work normally. Therefore, heat dissipation is particularly important during the operation of the laser projection device.

[0003] In the prior art, a fan is usually used to blow air to the heat source components inside the laser projection device, and heat dissipation is accelerated by increasing air convection. The disadvantage of this traditional heat dissipation method is that the fan working noise is too loud, making the working environment of the laser projection device noisy and affecting the user experience. The traditional heat dissipation method also designs a metal shell to conduct heat to the metal shell, and quickly dissipates heat inside the laser projection device through the fast heat dissipation performance of metal. The disadvantage of using the metal shell heat conduction method is that the metal shell will interfere with the wireless transmission signal of the laser projector. Utility Model Content

[0004] The purpose of the utility model is to solve the above problems and provide a laser projection device.

[0005] In order to meet the purpose of the utility model, the utility model adopts the following technical solutions:

[0006] The utility model provides a laser projection device, comprising: a laser component; and a heat dissipation component, which comprises a fixing plate, on which the laser component is arranged; the heat dissipation component also comprises a top heat conductive sheet located above the fixing plate, a side heat conductive sheet bent at the end of the top heat conductive sheet toward the fixing plate, and a heat dissipation frame installed on the top of the top heat conductive sheet; the side heat conductive sheet is located on the outer side of the side of the laser component.

[0007] In one embodiment, the top heat-conducting plate and the side heat-conducting plate together form a accommodating space; the laser assembly also includes a motor, a laser and a grating plate that are electrically connected to each other; the grating plate is located above the heat sink, the laser is placed in a through hole of the heat sink, and the motor is fixed to the bottom of the fixed plate.

[0008] In one embodiment, a housing component is further included, and the housing component includes a shell and a cover; the cover seals the laser component and the heat dissipation component in the shell; and the side heat conductive sheet contacts the inner side surface of the shell.

[0009] In one embodiment, one end of the laser passes through the top heat conductive sheet and is fixed to the fixing plate.

[0010] In one embodiment, the housing assembly further includes a sealing ring disposed at a connection between the cover and the shell.

[0011] In one embodiment, a groove for accommodating the sealing ring is provided at one end of the cover body facing the housing.

[0012] In one embodiment, a convex rib is provided on the end of the side wall of the shell facing the cover body to squeeze the sealing ring.

[0013] In one embodiment, a protrusion protruding from the surface of the sealing ring is provided on the sealing ring at a position opposite to the side wall of the groove.

[0014] In one embodiment, the cover body is provided with a breathable valve communicated with the interior of the shell.

[0015] In one embodiment, the laser assembly further includes a circuit board for driving and controlling the motor, the laser and the grating plate.

[0016] Compared with the prior art, the beneficial technical effects of the utility model are as follows:

[0017] In the laser projection device provided by the utility model, the laser component is arranged on a fixed plate, and a top heat conductive sheet is arranged on the top of the fixed plate, and a side heat conductive sheet is formed by bending the end of the top heat conductive sheet toward the fixed plate, and the side heat conductive sheet is located on the outer side of the side of the laser component. The heat generated by the laser component connected to the fixed plate during operation can be conducted to the outer shell in contact with the side heat conductive sheet through the top heat conductive sheet and the side heat conductive sheet, thereby dissipating the heat to the outside of the laser projection device, so as to achieve the purpose of quickly and timely reducing the temperature of the laser component and keep the working performance of the laser component stable.

[0018] In addition, the heat sink located on the top heat conductive sheet can promptly transfer the heat generated by the laser components of the laser assembly that passes through the top heat conductive sheet and is placed on the heat sink to the top heat conductive sheet through the heat sink, and then quickly transfer the heat to the side heat conductive sheet through the top heat conductive sheet, so that the heat generated by the related laser devices can be quickly transferred to the outside over a large area, thereby achieving the purpose of timely heat dissipation, stabilizing the working performance of the laser assembly, and extending the service life of the laser projection device.

[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 The figure is a schematic diagram of an exploded view of a laser assembly and a heat dissipation assembly in one embodiment of the laser projection device of the present invention.

[0022] Figure 2 The figure is a structural exploded view of the laser projection device of the present utility model.

[0023] Figure 3 The utility model is a schematic diagram of the assembly structure of the laser component and the heat dissipation component of the laser projection device.

[0024] Figure 4 The utility model is a schematic diagram of the structure of the top heat conducting plate and the side heat conducting plate of the laser projection device.

[0025] Figure 5 The figure is a schematic diagram of the structure of the heat dissipation frame of the laser projection device of the present utility model.

[0026] Figure 6 The figure is a schematic diagram of the assembly structure of the laser projection device of the present utility model.

[0027] Figure 7 for Figure 6 A partial enlarged view of part A of the laser projection device.

[0028] Figure 8 The figure is a schematic diagram of the main structure of the cover of the laser projection device of the present invention. DETAILED DESCRIPTION

[0029] 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.

[0030] 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.

[0031] 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.

[0032] The utility model provides a laser projection device, combined with Figures 1 to 8 As shown, it includes: a laser assembly 1 and a heat dissipation assembly 2. The heat dissipation assembly 2 has a fixing plate 21, on which the laser assembly 1 is arranged. The heat dissipation assembly 2 further includes a top heat conductive sheet 22 located above the fixing plate 21, a side heat conductive sheet 23 bent from the end of the top heat conductive sheet 22 toward the fixing plate 21, and a heat dissipation frame 24 installed on the top of the top heat conductive sheet 22. The side heat conductive sheet 23 is located on the side outer side of the laser assembly 1.

[0033] Specifically, refer to Figure 1 and Figure 3In one embodiment, the top heat conductive sheet 22 is in a quadrilateral structure as a whole. Among the four sides of the top heat conductive sheet 22, side heat conductive sheets 23 are arranged on at least two sides in the direction of the fixed plate 21. The top heat conductive sheet 22 and the side heat conductive sheets 23 together constitute a receiving space 20 facing the fixed plate 21, and have an opening in the direction of the fixed plate 21. The width of the side heat conductive sheet 23 is smaller than the width of the corresponding side of the top heat conductive sheet 22, so that a certain width of gap between the side heat conductive sheet 23 and the top heat conductive sheet 22 can allow air to circulate between the inside and outside of the receiving space 20. The top heat conductive sheet 22 and the side heat conductive sheets 23 together constitute an independent component, refer to Figure 3 .

[0034] In other embodiments, each side of the top heat conductive sheet 22 may be provided with a plurality of side heat conductive sheets 23 spaced apart from each other, and the width of the side heat conductive sheets 23 may be determined according to the needs of the actual application. In some embodiments, the side heat conductive sheets 23 have the same width as the connection between the side edges of the corresponding top heat conductive sheets 22, and in order to allow air to circulate inside and outside the accommodating space, a plurality of through holes may be provided in the top heat conductive sheet 22 and the side heat conductive sheets 23. In some other embodiments, the top heat conductive sheet 22 and the side heat conductive sheets 23 may also be provided in irregular shapes. In short, the arrangement of the top heat conductive sheet 22 and the side heat conductive sheet 23 may be determined according to specific needs, and is not limited to the examples listed above, but both are generally sheet-like structures.

[0035] In one embodiment, the fixing plate 21 is disposed at the bottom of the top heat conductive sheet 22 and is placed in the accommodating space 20 formed by the top heat conductive sheet 22 and the side heat conductive sheet 23. The top heat conductive sheet 22 can be fixed to the fixing plate 21 by screws. In other embodiments, the two can also be fixed to each other by welding or other methods such as snap-on methods. The laser assembly 1 is fixed to the fixing plate 21, and some components of the laser assembly 1 pass through the fixing plate 21 and are placed on the top of the top heat conductive sheet 22, some are located at the bottom of the fixing plate 21, and some are located between the fixing plate 21 and the top heat conductive sheet 22. Specifically, as Figure 1 , 3As shown in Figures 5 and 6, the laser assembly 1 includes a motor 10, a laser 11 and a grating plate 12 which are electrically connected to each other, and components (not numbered) for electrically connecting the above components to each other. The heat sink 24 is arranged on the top of the top heat conductive plate 22. The heat sink 24 is provided with a first through hole 241 for accommodating the laser 11 and a second through hole 242 for accommodating a rotating member (not shown). The grating plate 12 is arranged on the top of the heat sink 24 and is connected to the motor 10 through a rotating member. The motor 10 is fixed on the fixed plate 21, and the main body of the motor 10 is located at the bottom of the fixed plate 21. The rotating shaft (not shown) of the motor 10 passes through the top heat conductive plate 22 and enters the second through hole 242 of the heat sink 24, driving the rotating member to rotate, so as to drive the grating plate 12 to rotate synchronously. One end of the laser 11 passes through the top heat conductive sheet 22 and is fixedly connected to the fixing frame 21, and the other end is a laser emission host, which is placed in a through hole 241 opened in the heat dissipation frame 24. The laser emission port of the laser 11 faces the grating sheet 12, so as to emit laser toward the grating sheet 12 during the operation of the laser projection device and project an image with the cooperation of other components.

[0036] Since the laser 11 is located in the heat sink 24, the heat generated by the laser 11 during operation is conducted to the heat sink 24, and the heat sink 24 dissipates part of the heat through its own heat sink. The heat sink 24 can also conduct part of the heat to each side heat sink 23 through the top heat sink 22 connected to it, so that the heat generated by the laser 11 can be dissipated through the heat sink 24 and the side heat sink 23 to reduce the temperature of the laser 11. In this embodiment, one end of the side heat conductive sheet 23 is connected to the top heat conductive sheet 22, and the other end is suspended inside the laser projection device, and the side heat conductive sheet 23 is located on the side outside of the motor 10 of the laser assembly 1 and the components fixed to the fixing plate 21. During the operation of the laser projection device, part of the heat generated by the components located in the accommodating space 20 of the side heat conductive sheet 23 can be directly conducted away through the side heat conductive sheet 23, and the other part of the heat can be conducted to the outer casing of the laser projection device through the air circulation in the gaps between the side heat conductive sheets 23, so as to reduce the temperature of the laser assembly 1 through multiple heat dissipation pathways and maintain the stability of the working performance of the laser assembly 1.

[0037] In other embodiments, the side heat conducting sheet 23 may be placed on the upper surface of the fixing plate 21. A support portion may be provided near the side edge of the fixing plate 21 to support the side heat conducting sheet 23, so as to support and fix the top heat conducting sheet 22 and the side heat conducting sheet 23 on the top of the fixing plate 21.

[0038] The laser assembly 1 further includes a circuit board 15 for driving and controlling the motor 10, the laser 11 and the grating sheet 12. In one embodiment, the circuit board 15 is disposed below the side heat conducting sheet 23 and opposite to the top heat conducting sheet 22, that is, the circuit board 15 is disposed opposite to and fixedly connected to the fixing plate 21. There is a certain space between the circuit board 15 and the fixing plate 21 to accommodate the motor 10 and related components and to provide a certain space for the heat generated by the laser assembly 1 to be transferred to the housing of the laser projection device through air circulation.

[0039] Combination Figures 6 to 8 As shown, the laser projection device provided by the utility model also includes a housing component 3, which includes a housing 31 and a cover 32 that seals the laser component 1 and the heat dissipation component 2 in the housing 31; the housing 31 includes a side wall 310 and a cavity 312 for accommodating the laser component 1 and the heat dissipation component 2. The inner side surface of the side wall 310 of the housing 31 is opposite to the side heat conductive sheet 23 and contacts each other. The area of ​​the side heat conductive sheet 23 is smaller than the area of ​​the side wall 310 opposite to it. The side heat conductive sheet 23 contacts the side wall 310 of the housing, and can quickly conduct the heat generated during the working process of the laser component 1 to the side wall 310 of the housing, and dissipate the heat to the outside of the laser projector through the side wall 310 of the housing.

[0040] In addition, since there is a certain gap between the top heat conductive sheet 22, the side heat conductive sheet 23 and the fixing plate 21, part of the heat generated by the laser assembly 1 is conducted to the housing side wall 310 through the side heat conductive sheet 23, and the other part of the heat is conducted to the housing side wall 310 through the air circulation inside and outside the accommodation space. In these two ways, the heat generated by the laser assembly 1 can be quickly released to the outside of the housing 31, thereby reducing the operating temperature of the laser assembly 1, especially the laser 11, so that the working performance of the laser projection device tends to be stable and its service life is extended.

[0041] The cover 32 is buckled on the housing 31, thereby sealing the cavity 312 thereof. In order to improve the sealing performance between the housing 31 and the cover 32, in one embodiment, a sealing ring 33 is further provided at the connection between the cover 32 and the housing 31. In order to achieve a better sealing effect of the sealing ring 33, in one embodiment, reference Figure 7The end of the cover 32 facing the housing 31 is provided with a groove 320 for accommodating the sealing ring 33, and the groove 320 is provided on the inner side of the end of the cover 32. The sealing ring 33 includes a main body 330 and an extension 331, and the main body 330 of the sealing ring is placed in the groove 320 of the cover 32, and the extension 331 of the sealing ring extends from the groove 320 to the inner side of the cover 32. Since the groove 320 is arranged on the inner side of the end of the cover body 32, when the sealing ring 33 is installed in the groove 320 and the cover body 32 covers the side wall 310 of the shell body 31, the outer side wall 323 of the cover body 32 directly contacts a part of the end of the shell side wall 310, and the sealing ring 33 on the inner side of the outer side wall 323 of the cover body 32 directly contacts another part of the end of the shell side wall 310, so as to achieve the effect of sealing by squeezing the sealing ring 33 by the cover body 32 and the shell body 31, and the sealing ring 33 cannot be seen at the contact point between the cover body 32 and the shell body 31 from the outside, so as not to affect the appearance of the shell assembly.

[0042] In one embodiment, a convex rib 311 is provided on the side wall 310 of the housing 31 at the end facing the cover 31. When the cover 32 covers the housing 31, a groove 324 is formed between the convex rib 311 and the outer side wall 323 of the cover 32. When the cover 32 and the housing 31 are assembled and squeezed with the sealing ring 33, the sealing ring 33 squeezes part of the sealing ring 33 into the groove 324 under the pressure of both the cover 32 and the housing 31. The sealing degree between the cover 32 and the housing 31 is better due to the action of the sealing ring 33. The sealing ring 33 is more stable and less likely to slide under the blocking of the convex rib 311 and the position limiting action of the groove 320 of the cover 32, and can further prevent water vapor from entering the interior of the housing 31 from the gap between the cover 32 and the housing 31, so as to achieve a better waterproof effect, thereby maintaining the performance of the laser projection device stable and extending the service life of the laser projection device.

[0043] In another embodiment, a protrusion 331 protruding from the surface of the sealing ring 33 is provided on the sealing ring 33 at a position opposite to the side wall of the groove 320 of the cover body 32, and the protrusion 311 forms a protruding ring shape on the outer surface of the sealing ring 33. When the sealing ring 33 is placed in the groove 320 of the cover body, the protrusion 331 exerts a squeezing force on the inner surface of the groove 320, which can increase the friction between the sealing ring 33 and the groove 320, prevent the sealing ring 33 from falling off, and have a better effect on preventing water vapor from entering the interior of the housing 31 through the inner side wall of the groove 320. One or more protrusions 331 can be provided.

[0044] In some of the above embodiments, the sealing ring 33 is provided, so that the sealing effect of the inside of the shell 31 is better, and the barrier effect between the inside and the outside is better. During the operation of the laser projection device, the internal laser component 1 often generates heat, which increases the temperature of the air inside the shell 31, and the air pressure increases accordingly. The internal air pressure exerts a certain pressure on the sealing ring 33; or after the internal air temperature decreases, the external air pressure exerts a certain pressure on the sealing ring 33. Therefore, in one embodiment, the cover body 32 is provided with a vent valve 321 that is connected to the inside of the shell 31, refer to Figure 2 and Figure 8 The air pressure inside and outside the shell 31 can be balanced through the air valve 321 to reduce the pressure of the internal air pressure or the external air pressure on the sealing ring 33, so as to avoid fogging inside the shell 31 when the temperature and air pressure change.

[0045] In summary, the laser projection device provided by the utility model is provided with a top heat conductive sheet 22 and a side heat conductive sheet 23 is formed by bending the end of the top heat conductive sheet 22 toward the fixing plate 21, so that the heat generated by the laser assembly 1 during operation is conducted through the heat sink, the top heat conductive sheet 22 and the side heat conductive sheet to quickly dissipate the heat, reduce the temperature of the laser assembly, keep the performance of each component of the laser assembly 1 stable, and improve the service life of the laser projector. In addition, a sealing ring is also provided between the cover and the shell of the laser projection device to ensure the waterproof performance of the laser projection device.

[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: Laser components; and A heat dissipation assembly, comprising a fixing plate on which the laser assembly is mounted; characterized in that the heat dissipation assembly also comprises a top heat conductive sheet located above the fixing plate, a side heat conductive sheet bent from the end of the top heat conductive sheet toward the fixing plate, and a heat dissipation frame installed on the top of the top heat conductive sheet; the side heat conductive sheet is located on the outside of the side of the laser assembly.

2. The laser projection device according to claim 1, characterized in that: The top heat-conducting plate and the side heat-conducting plate together form a containing space; the laser assembly also includes a motor, a laser and a grating plate electrically connected to each other; the grating plate is located above the heat sink, and the laser is placed in the through hole of the heat sink; the motor is fixed to the bottom of the fixed plate.

3. The laser projection device according to claim 2, characterized in that: It also includes a shell component, which includes a shell and a cover; the cover seals the laser component and the heat dissipation component in the shell; and the side heat conductive sheet contacts the inner side surface of the shell.

4. The laser projection device according to claim 2, characterized in that: One end of the laser passes through the top heat conducting sheet and is fixed to the fixing plate.

5. The laser projection device according to claim 3, characterized in that: The housing assembly further comprises a sealing ring arranged at the connection between the cover body and the shell.

6. The laser projection device according to claim 5, characterized in that: A groove for accommodating the sealing ring is arranged at one end of the cover body facing the shell.

7. The laser projection device according to claim 5, characterized in that: The end of the side wall of the shell body facing the cover body is provided with a convex rib to squeeze the sealing ring.

8. The laser projection device according to claim 6, characterized in that: The sealing ring is provided with a convex portion protruding from the surface of the sealing ring at a position opposite to the side wall of the groove.

9. The laser projection device according to claim 5, characterized in that: The cover body is provided with a breathable valve communicated with the interior of the shell.

10. The laser projection device according to claim 2, characterized in that: The laser assembly also includes a circuit board for driving and controlling the motor, the laser and the grating plate.

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