Laser projection equipment

Abstract

The invention discloses laser projection equipment. The laser projection equipment comprises a top cover assembly, a back plate, a conductive mesh enclosure and a shell, the top cover assembly and the back plate are made of metal materials; the shell is provided with an opening, the top cover assembly covers the opening and forms a cavity together with the shell, the mesh enclosure surrounds the periphery of the shell, the back plate is located in the cavity, and the side, facing the top cover assembly, of the back plate is provided with a lens assembly; a first conductive structure is arranged in the cavity, at least part of the first conductive structure is located on the side, away from the light emitting face of the lens assembly, in the shell, and the first conductive structure is connected with the top cover assembly and the back plate, so that the top cover assembly and the back plate are electrically conducted to form a grounding loop, and the top cover assembly is grounded. The electromagnetic interference of the top cover assembly on the whole equipment is effectively weakened or eliminated, so that the EMC performance of the laser projection equipment can be ensured to a certain extent, and the qualified rate of EMC testing is further ensured.

Description

Technical Field

[0001] The present invention relates to the field of laser display technology, and more specifically, to a laser projection device. Background Art

[0002] Laser projection equipment, such as laser TV, is an ultra-short-throw projection device that uses laser as a light source.

[0003] At present, the whole shell of laser projection equipment includes a shell, a top cover assembly covering the shell, and a mesh cover surrounding the outer wall of the shell. Among them, the top cover assembly and the mesh cover are made of aluminum alloy materials. Due to the material properties of the aluminum alloy material itself, when the laser projection equipment is used, the top cover assembly and the mesh cover will generate electromagnetic radiation, which will affect the EMC (Electro Magnetic Compatibility) performance of the laser projection equipment and cause the laser projection equipment to fail the EMC test. Summary of the invention

[0004] In order to solve the problems described in the above background technology, some embodiments of the present invention provide a laser projection device, which effectively solves the problems of poor EMC performance of the laser projection device and unqualified EMC test results.

[0005] The present invention provides a laser projection device, comprising a top cover assembly, a back plate, a conductive mesh cover and a housing;

[0006] The top cover assembly and the back plate are made of metal material;

[0007] The shell has an opening, the top cover assembly is covered at the opening and encloses a cavity together with the shell, the mesh cover is arranged around the outer periphery of the shell, the back plate is located in the cavity, and a lens assembly is arranged on one side of the back plate facing the top cover assembly;

[0008] A first conductive structure is disposed in the cavity, at least a portion of the first conductive structure is located on a side of the housing away from the light emitting surface of the lens assembly, and the first conductive structure is connected to the top cover assembly and the back plate respectively.

[0009] It can be seen from the above technical scheme that the present invention discloses a laser projection device, which is formed by arranging a first conductive structure in a cavity enclosed by a shell and a top cover assembly, and the first conductive structure is respectively connected to the top cover assembly and the back plate, so that the top cover assembly is grounded, thereby effectively weakening or eliminating the electromagnetic interference of the cover plate assembly to the entire device, thereby ensuring the EMC performance of the laser projection device to a certain extent, thereby ensuring the pass rate of the EMC test of the laser projection device. Further, by arranging at least part of the first conductive structure on the side of the shell away from the light-emitting surface of the lens assembly, it is possible to largely avoid the first conductive structure from blocking or interfering with the projection light beam projected by the lens assembly, thereby ensuring the normal use of the laser projection device. In addition, by arranging at least part of the first conductive structure on the side of the shell away from the light-emitting surface of the lens assembly, the first conductive structure will not affect the arrangement of components such as the lens assembly in the cavity, thereby simplifying the internal arrangement of the laser projection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the embodiments are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0011] Figure 1 The internal structure of the first laser projection device according to the embodiment of the present invention is shown in FIG. Figure 1 ;

[0012] Figure 2 The internal structure of the first laser projection device according to the embodiment of the present invention is shown in FIG. Figure 2 ;

[0013] Figure 3 This is a schematic diagram of the exploded structure of the second laser projection device according to an embodiment of the present invention;

[0014] Figure 4 This is a schematic structural diagram of a mesh cover of the second type of laser projection device according to an embodiment of the present invention;

[0015] Figure 5 This is a schematic structural diagram of the upper shell of the housing of the second laser projection device according to the embodiment of the invention;

[0016] Figure 6 This is a schematic diagram of the internal structure of the second laser projection device according to an embodiment of the present invention;

[0017] Figure 7 This is a schematic diagram of the connection between the mesh cover and the second conductive connector of the second type of laser projection device according to an embodiment of the present invention;

[0018] Figure 8 for Figure 7 A local enlarged schematic diagram at point A;

[0019] Fig. 9 for Figure 7 A local enlarged schematic diagram at B;

[0020] Fig.10 This is a schematic diagram of the connection between the mesh cover, the housing and the second conductive connector of the second type of laser projection device according to an embodiment of the present invention;

[0021] Fig.11 This is a schematic diagram of the internal structure of a third laser projection device according to an embodiment of the present invention;

[0022] Fig.12 is a schematic diagram of the internal structure of a fourth laser projection device according to an embodiment of the present invention;

[0023] Fig.13 for Fig.12 A local enlarged schematic diagram at point C.

[0024] in:

[0025] 1. Top cover assembly; 11. First fixed cover plate; 12. Second fixed cover plate; 13. Sliding cover plate; 2. Back plate; 3. Mesh cover; 31. Bending structure; 32. Second fastening hole; 33. Tab; 4. Shell; 41. Upper shell; 42. Lower shell; 43. Avoidance hole; 5. Shielding cover assembly; 51. Shielding cover body; 52. Shielding cover bracket; 61. First conductive connector; 62. Second conductive structure; 63. Second conductive connector; 631. Metal part; 632. Wire; 633. First connection hole; 634. Third connection hole; 635. First fastening hole. DETAILED DESCRIPTION

[0026] In order to make the purpose and implementation mode of the present invention clearer, the exemplary implementation mode of the present invention will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of the present invention. Obviously, the described exemplary embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0027] It should be noted that the brief description of the terms in the present invention is only for the convenience of understanding the embodiments described below, and is not intended to limit the embodiments of the present invention. Unless otherwise specified, these terms should be understood according to their common and usual meanings.

[0028] The terms "first", "second", "third", etc. in the specification and claims of the present invention and the above drawings are used to distinguish similar or similar objects or entities, and do not necessarily mean to limit a specific order or sequence, unless otherwise noted. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances.

[0029] The terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover but not exclude inclusion, for example, a product or device comprising a list of components is not necessarily limited to all the components expressly listed but may include other components not expressly listed or inherent to such product or device.

[0030] Reference Figures 1 to 13 As shown, the laser projection device provided in this embodiment includes a top cover assembly 1, a back plate 2, a conductive mesh cover 3 and a shell 4.

[0031] Specifically, the top cover assembly 1 and the back plate 2 are made of metal. The housing 4 has an opening, the top cover assembly 1 is covered at the opening and together with the housing 4 form a cavity, the mesh cover 3 is arranged around the outer periphery of the housing 4, the back plate 2 is located in the cavity, and a lens assembly is arranged on one side of the back plate 2 facing the top cover assembly 1.

[0032] A first conductive structure is disposed in the cavity. The first conductive structure is located on a side of the housing 4 away from the light-emitting surface of the lens assembly. The first conductive structure is respectively connected to the top cover assembly 1 and the back plate 2 to ground the top cover assembly 1.

[0033] In a specific implementation, the top of the shell 4 may have an opening, and the top cover assembly 1 is set on the top of the shell 4 and encloses the shell 4 to form a cavity. In this case, the top cover assembly 1 is used to form the top surface of the appearance of the laser projection device, and it is convenient to place the back plate 2 and the lens assembly connected to the back plate 2 from the opening at the top of the shell 4 into the shell 4. Alternatively, in other implementations, the side of the shell 4 may have an opening, and the top cover assembly 1 is set on the side of the shell 4 and encloses the shell 4 to form a cavity. In this case, the top cover assembly 1 forms part of the side surface of the appearance of the laser projection device.

[0034] Specifically, the top cover assembly 1 can be fixedly connected to the shell 4 by fastening connectors such as screws, and the mesh cover 3 is arranged around the outer circumference of the shell 4 and connected to the shell 4 by fastening connectors such as screws.

[0035] It should be noted that, since the top cover assembly 1 is made of metal material, the top cover assembly 1 will generate electromagnetic radiation outward during the use of the laser projection device, thereby causing electromagnetic interference to the laser projection device and affecting the EMC performance of the laser projection device. For example, the top cover assembly 1 can be an aluminum alloy top cover assembly, or the top cover assembly 1 can be a copper top cover assembly.

[0036] Alternatively, in some implementations, the top cover assembly 1 and the mesh cover 3 may also be made of non-metallic conductive materials, such as graphene and other materials.

[0037] When implementing it, refer to Figure 1 and Figure 2The first laser projection device shown can set a first conductive structure in the cavity, and the first conductive structure is respectively connected to the top cover assembly 1 and the back plate 2, so that the top cover assembly 1 and the back plate 2 are finally connected to form a grounding loop, thereby realizing the grounding of the top cover assembly 1, so as to effectively eliminate the electromagnetic interference of the top cover assembly 1.

[0038] Furthermore, by arranging at least part of the first conductive structure on the side of the housing away from the light-emitting surface of the lens assembly, it is possible to largely avoid the first conductive structure from blocking or interfering with the projection light beam projected by the lens assembly, thereby ensuring the normal use of the laser projection device. In addition, arranging at least part of the first conductive structure on the side of the housing away from the light-emitting surface of the lens assembly will not affect the arrangement of components such as the lens assembly in the cavity, thereby simplifying the internal arrangement of the laser projection device.

[0039] It should be noted that the lens assembly referred to in this embodiment may specifically include a light source, an optical machine and a lens body. The light source, the optical machine and the lens body are arranged along the light path. The light source is configured to provide an illumination beam (laser beam), the optical machine is configured to adjust the illumination beam provided by the light source using an image signal to obtain a projection beam, and the lens body is configured to emit the projection beam from the light emitting surface and project it onto a screen or a wall to realize imaging for viewing by the user.

[0040] Exemplarily, the laser projection device in this embodiment may specifically be a laser TV, or may be a micro-projection device.

[0041] For example, refer to Figure 3 As shown, the housing 4 may include an upper housing 41 and a lower housing 42, wherein the upper housing 41 is located above the lower housing 42 and is enclosed together with the lower housing 42 to form the housing 4. Specifically, the upper housing 41 and the lower housing 42 may be connected by fastening connectors such as screws or by snapping.

[0042] For example, when the upper shell 41 and the lower shell 42 are connected by fastening connectors, fastening holes are provided on both the upper shell 41 and the lower shell 42, and the fastening connectors pass through the fastening holes of the upper shell 41 and the lower shell 42 to connect the upper shell 41 and the lower shell 42 together. Specifically, multiple fastening holes can be arranged at intervals along the circumference of the shell 4, and multiple fastening connectors are also arranged accordingly, so that the connection stability of the upper shell 41 and the lower shell 42 can be further improved through the cooperation of multiple fastening holes and multiple fastening connectors.

[0043] For example, the fastening hole may be a threaded hole, and the fastening connector may be a screw or a bolt matched with the threaded hole. Alternatively, the fastening hole may be a plain hole, and the fastening connector may be a fastening pin matched with the plain hole.

[0044] For example, when the upper shell 41 and the lower shell 42 are connected by snapping, a snapping protrusion can be provided on one of the upper shell 41 and the lower shell 42, and a snapping groove can be provided on the other of the upper shell 41 and the lower shell 42, and the snapping protrusion is snapped into the snapping groove to achieve the snapping connection between the upper shell 41 and the lower shell 42. Specifically, a plurality of snapping protrusions can be provided at intervals along the circumference of the housing 4, and a plurality of snapping grooves are also provided accordingly, so that the connection reliability of the upper shell 41 and the lower shell 42 is further improved through the cooperation of a plurality of snapping protrusions and snapping grooves.

[0045] In summary, the first laser projection device of this embodiment can eliminate the electromagnetic interference of the top cover assembly 1 by only grounding the top cover assembly 1, thereby ensuring the EMC performance of the laser projection device to a certain extent, and thereby ensuring the pass rate of the EMC test of the laser projection device.

[0046] In some embodiments, reference Figure 1 and Figure 2 In the first laser projection device shown, the first conductive structure includes a shielding cover assembly 5 and a first conductive connector 61. The shielding cover assembly 5 is located on the side of the shell 4 facing away from the light-emitting surface of the lens assembly. The shielding cover assembly 5 can be specifically located above the back plate 2 and connected to the back plate 2. The first conductive connector 61 is respectively connected to the top cover assembly 1 and the shielding cover assembly 5.

[0047] That is to say, the top cover assembly 1 can be specifically connected to the shielding cover assembly 5 through the first conductive connector 61 to achieve electrical conduction, and then connected to the back plate 2 through the shielding cover assembly 5 to achieve electrical conduction, thereby finally achieving the connection and conduction between the top cover assembly 1 and the back plate 2, thereby achieving grounding of the top cover assembly 1.

[0048] In a specific implementation, the shielding cover assembly 5 can be directly connected to the back plate 2, or the shielding cover assembly 5 can also be connected and conducted with the back plate 2 through a fastening connector.

[0049] For example, when the shielding cover assembly 5 is directly connected to the back plate 2, the shielding cover assembly 5 can be directly overlapped on the back plate 2, or the shielding cover assembly 5 can be bonded to the back plate 2 through a conductive adhesive to achieve connection and conduction. For example, when the shielding cover assembly 5 is connected to the back plate 2 through a fastening connector, holes can be set on both the shielding cover assembly 5 and the back plate 2, and the shielding cover assembly 5 and the back plate 2 are connected and conducted through the fastening connector inserted in the hole.

[0050] Specifically, in some embodiments, the first conductive connector 61 may specifically include a conductive foam arranged between the top cover assembly 1 and the shielding cover assembly 5, and the conductive foam is respectively connected to the top cover assembly 1 and the shielding cover assembly 5, so as to realize the connection between the top cover assembly 1 and the shielding cover assembly 5, and the shielding cover assembly 5 is conductive with the back plate 2, and then finally the top cover assembly 1 and the back plate 2 are connected and form a grounding loop to realize the grounding of the top cover assembly 1.

[0051] Alternatively, in other implementations, the first conductive connector 61 may be a conductive adhesive, in which case the conductive adhesive is disposed between the top cover assembly 1 and the shield cover assembly 5 and is respectively bonded and fixed to the top cover assembly 1 and the shield cover assembly 5 to achieve connection. In other words, the conductive adhesive can not only achieve electrical connection between the top cover assembly 1 and the shield cover assembly 5, but also achieve bonding connection between the top cover assembly 1 and the shield cover assembly 5, thereby ensuring the reliability of the positional connection between the two.

[0052] The specific structure of the first conductive connecting member 61 can refer to the above two examples. In this embodiment, conductive foam is selected as the first conductive connecting member 61. The following description will be made based on the assumption that the first conductive connecting member 61 is conductive foam.

[0053] In summary, conductive foam can be set between the top cover assembly 1 and the shielding cover assembly 5 to achieve connection between the top cover assembly 1 and the shielding cover assembly 5, and then the shielding cover assembly 5 is connected to the back plate 2, so as to finally achieve conduction between the top cover assembly 1 and the back plate 2 to form a grounding loop to achieve grounding of the top cover assembly 1, thereby effectively solving the problem of electromagnetic interference of the top cover assembly 1 to the laser projection equipment.

[0054] Reference Figure 1 and Figure 2 The first laser projection device shown in the figure has a specific structure in which the top cover assembly 1 and the shielding cover assembly 5 are connected by conductive foam: Figure 3 As shown, the top cover assembly 1 includes a first fixed cover plate 11, a second fixed cover plate 12 and a sliding cover plate 13. The first fixed cover plate 11 and the second fixed cover plate 12 are arranged in sequence along the direction from the front side to the rear side of the laser projection device. The sliding cover plate 13 is arranged on the second fixed cover plate 12 and can be reciprocated relative to the first fixed cover plate 11 along the direction from the front side to the rear side of the laser projection device to cover the opening or make the opening in an open state. The specific structural description of the top cover assembly 1 refers to the structural description of the top cover assembly 1 of the existing laser projection device, and this embodiment will not elaborate on this.

[0055] In some embodiments, the second fixed cover plate 12 is connected to the shielding cover assembly 5 through a first conductive connector 61; a first mounting hole is provided on the sliding cover plate 13, and a second mounting hole is provided on the second fixed cover plate 12; the sliding cover plate 13 is connected to the second fixed cover plate 12 through a mounting connector passed through the first mounting hole and the second mounting hole.

[0056] In specific implementation, the conductive foam is respectively connected to the second fixed cover plate 12 and the shielding cover assembly 5, and the sliding cover plate 13 is connected to the second fixed cover plate 12 through mounting connectors passed through the first mounting hole and the second mounting hole, so that the first fixed cover plate 11, the second fixed cover plate 12, and the sliding cover plate 13 are finally connected to the back plate 2 to form a grounding loop, thereby realizing the grounding of the first fixed cover plate 11, the second fixed cover plate 12, and the sliding cover plate 13, so as to effectively solve the electromagnetic interference of the top cover assembly 1 to the laser projection equipment.

[0057] Exemplarily, the first mounting hole and the second mounting hole may both be threaded holes, and the mounting connector may be a bolt or a screw, etc. Alternatively, the first mounting hole and the second mounting hole may both be plain holes, and the mounting connector may be a fastening pin.

[0058] In summary, the first laser projection device provided in this embodiment connects the top cover assembly 1 and the shielding cover assembly 5 through conductive foam, thereby achieving conduction between the top cover assembly 1 and the back plate 2, thereby achieving grounding of the top cover assembly 1, thereby effectively solving the problem of electromagnetic interference of the top cover assembly 1 to the laser projection device.

[0059] Reference Figures 3 to 10 In the second laser projection device shown, when the top cover assembly 1 is grounded, a second conductive connector 63 can also be set between the mesh cover 3 and the top cover assembly 1, and the side of the mesh cover 3 close to the top cover assembly 1 is connected to the second conductive connector 63, and the second conductive connector 63 is respectively connected to the first fixed cover plate 11 and the second fixed cover plate 12, so that the mesh cover 3 can also be grounded.

[0060] Specifically, the second conductive connecting member 63 can be arranged in the cavity, and the outer edge of the mesh cover 3 is provided with at least two bending structures 31 extending toward the cavity, and at least two bending structures 31 are located at different positions of the outer edge of the mesh cover 3; a avoidance hole 43 is provided at a position corresponding to the bending structure 31 on the shell 4, and each bending structure 31 extends into the cavity after passing through the avoidance hole 43, and each bending structure 31 is connected to the second conductive connecting member 63.

[0061] That is to say, at this time, the bending structure 31 of the mesh cover 3 is connected to the second conductive connecting member 63 to achieve electrical conduction, the second conductive connecting member 63 is respectively connected to the first fixed cover plate 11 and the second fixed cover plate 12, the second fixed cover plate 12 is connected to the shielding cover assembly 5 through the first conductive connecting member 61, the shielding cover assembly 5 is connected to the back plate 2, and the second fixed cover plate 12 is connected to the sliding cover plate 13 through the mounting connecting members passed through the first mounting hole and the second mounting hole, so that the mesh cover 3 and the top cover assembly 1 are finally connected to the back plate 2 and conduct to form a grounding loop, so that the mesh cover 3 and the top cover assembly 1 are grounded, so as to further solve the electromagnetic interference of the top cover assembly 1 and the mesh cover 3 to the laser projection equipment.

[0062] Reference Figures 3 to 10 In the second laser projection device shown, the second conductive connecting member 63 may be a metal member 631. In specific implementation, there may be at least two metal members 631, and the at least two metal members 631 are arranged at intervals along the circumference of the housing 4.

[0063] The connection structure between the metal component 631 and the first fixed cover plate 11 is as follows: a first connection hole 633 is provided at one end of the metal component 631 close to the first fixed cover plate 11, and a second connection hole is provided at a position corresponding to the first connection hole 633 on the first fixed cover plate 11, and the metal component 631 is connected to the first fixed cover plate 11 by a first fastener passing through the first connection hole 633 and the second connection hole.

[0064] Furthermore, the connection structure between the metal member 631 and the second fixed cover plate 12 is as follows: a third connection hole 634 is provided at one end of the metal member 631 close to the second fixed cover plate 12, a fourth connection hole is provided at a position corresponding to the third connection hole 634 on the second fixed cover plate 12, and the metal member 631 is connected to the second fixed cover plate 12 by a second fastener penetrating through the third connection hole 634 and the fourth connection hole.

[0065] Exemplarily, the metal part 631 may be a sheet metal part.

[0066] In specific implementation, the connection structure between the metal part 631 and the bending structure 31 of the mesh cover 3 is: a first fastening hole 635 can be set on the metal part 631, and a second fastening hole 32 can also be correspondingly set on the bending structure 31, and the fastening connection part passes through the first fastening hole 635 of the metal part 631 and the second fastening hole 32 of the bending structure 31, thereby realizing the connection and conduction between the metal part 631 and the mesh cover 3.

[0067] For example, refer to Figure 6 and Figure 7As shown, the number of metal parts 631 can be three, wherein at least two metal parts 631 have the same outer contour shape and size, thereby saving mold making and reducing production costs. Alternatively, in other implementations, the size and contour shape of the three metal parts 631 can also be the same.

[0068] Reference Fig.11 In the third laser projection device shown in FIG. 1 , the second conductive connecting member 63 can be Figures 3 to 10 In addition to the metal part 631 shown, the second conductive connecting part 63 can also be a wire 632. The outer edge of the mesh cover 3 is provided with a tongue 33 extending toward the cavity. A avoidance hole 43 for the tongue 33 to enter the cavity is provided at a position corresponding to the tongue 33 on the shell 4. The tongue 33 is connected to the first fixed cover plate 11, and the wire 632 is respectively connected to the tongue 33 and the second fixed cover plate 12, so that the mesh cover 3 and the top cover assembly 1 are grounded, so as to effectively solve the electromagnetic interference of the mesh cover 3 and the top cover assembly 1 to the laser projection equipment.

[0069] Exemplarily, the tongue 33 can be bent at 90 degrees with the outer edge of the mesh cover 3, so that the tongue 33 can pass through the avoidance hole 43 and enter the cavity to connect with the wire 632 and the first fixed cover plate 11.

[0070] In specific implementation, the connection structure between the latch tongue 33 and the first fixed cover plate 11 is as follows: a first reserved hole is provided on the latch tongue 33, and a second reserved hole is provided at a position corresponding to the first reserved hole on the first fixed cover plate 11, and the latch tongue 33 is connected to the first fixed cover plate 11 by a reserved connecting piece passing through the first reserved hole and the second reserved hole.

[0071] Exemplarily, the first reserved hole and the second reserved hole can both be threaded holes, and the reserved connection piece can be a screw or bolt that fits the threaded hole. Alternatively, the first reserved hole and the second reserved hole can both be light holes, and the reserved connection piece can be a fastening pin that fits the light hole. In specific implementation, at least two first reserved holes can be set, and at least two second reserved holes can also be set, and the second reserved holes correspond to the first reserved holes one by one, so that the connection reliability between the tongue 33 and the first fixed cover plate 11 can be further improved through the cooperation of multiple first reserved holes and second reserved holes.

[0072] That is to say, the tongue 33 and the second fixed cover plate 12 are electrically connected through the wire 632, the tongue 33 is also connected to the first fixed cover plate 11, and the sliding cover plate 13 is connected to the second fixed cover plate 12, so that the mesh cover 3, the first fixed cover plate 11, the second fixed cover plate 12 and the sliding cover plate 13 are finally connected to the back plate 2 to achieve grounding.

[0073] Reference Figures 1 to 11As shown, for the first, second and third laser projection devices, the top cover assembly 1 is connected to the back plate 2 through the shielding cover assembly 5, and the specific connection structure of the top cover assembly 1 and the shielding cover assembly 5 can be: the shielding cover assembly 5 includes a shielding cover body 51 and a shielding cover bracket 52 connected to the shielding cover body 51, the shielding cover body 51 is connected to the first conductive connector 61, and the shielding cover bracket 52 is connected to the back plate 2.

[0074] Specifically, the top cover assembly 1 is connected to the shielding cover body 51 through a first conductive connector 61 disposed between the top cover assembly 1 and the shielding cover body 51, the shielding cover body 51 is connected to the shielding cover bracket 52, and the shielding cover bracket 52 is connected to the back plate 2, thereby realizing the connection between the top cover assembly 1 and the back plate 2.

[0075] Illustratively, the shielding cover body 51 can be snapped on or fixed to the shielding cover bracket 52 by fastening connectors, and the shielding cover bracket 52 can be connected to the back panel 2 or connected by fastening connectors to achieve connection and conduction. The specific connection method between the shielding cover bracket 52 and the back panel 2 can be set according to actual needs, and this embodiment does not make any specific limitation on this.

[0076] Reference Fig.12 and Fig.13 As shown, this embodiment also provides a fourth laser projection device, that is, only the mesh cover 3 can be grounded while the top cover assembly is not grounded. In this case, the mesh cover 3 and the back plate 2 can be directly connected and conducted through the second conductive structure 62, so that the mesh cover 3 and the back plate 2 are directly connected to form a grounding loop, thereby achieving grounding of the mesh cover 3, so as to effectively eliminate the electromagnetic interference of the mesh cover 3.

[0077] Specifically, when the mesh cover 3 is grounded, the specific connection and conduction structure between the second conductive structure 62 and the mesh cover 3 can be: a first assembly hole is provided on the mesh cover 3, and a second assembly hole is provided on the second conductive structure 62. The second conductive structure 62 is connected and conducted with the mesh cover 3 via assembly parts passed through the first assembly hole and the second assembly hole.

[0078] Specifically, the second conductive structure 62 may be a metal piece, and the metal piece may be connected and conducted with the mesh cover 3 and the back plate 2 respectively.

[0079] That is to say, when the second conductive structure 62 is a metal part, a first assembly hole is provided on the metal part, and a second assembly hole is provided on the second conductive structure 62. The second conductive structure 62 and the metal part are connected and conducted through the assembly parts passing through the first assembly hole and the second assembly hole.

[0080] For example, the first assembly hole and the second assembly hole can both be threaded holes, and the assembly parts can be bolts or screws that match the threaded holes. Alternatively, the first assembly hole and the second assembly hole can both be light holes, and the assembly parts can be fastening pins that match the light holes, so as to achieve the connection and conduction between the second conductive structure 62 and the mesh cover 3.

[0081] In a specific implementation, a plurality of first assembly holes can be set, and the plurality of first assembly holes are arranged at circumferential intervals along the mesh cover 3, and a plurality of second assembly holes are also set, and the plurality of second assembly holes correspond to the plurality of first assembly holes one by one, so that the stability of the connection and conduction between the mesh cover 3 and the second conductive structure 62 can be further improved through the cooperation of the plurality of first assembly holes and the plurality of second assembly holes.

[0082] At the same time, the connection and conduction between the second conductive structure 62 and the back plate 2 can be directly contacted or connected by screws. For example, when the second conductive structure 62 is directly contacted and connected with the back plate 2, the second conductive structure 62 can be directly overlapped on the back plate 2 to achieve contact and conduction, or the second conductive structure 62 can be bonded to the back plate 2 through a conductive adhesive and achieve electrical conduction. For example, when the second conductive structure 62 is connected and connected with the back plate 2 through a fastening connector, holes can be set on both the second conductive structure 62 and the back plate 2, and the connection and conduction between the second conductive structure 62 and the back plate 2 can be achieved by screws inserted into the holes.

[0083] Furthermore, the specific structure for the conduction between the mesh cover 3 and the back plate 2 can be: a bending structure 31 extending toward the cavity is provided on the outer edge of the mesh cover 3, and a avoidance hole 43 is provided on the shell 4 at a position corresponding to the bending structure 31. The bending structure 31 passes through the avoidance hole 43 and extends into the cavity and is connected to the second conductive structure 62 for conduction. The first assembly hole can be specifically provided on the bending structure 31, so as to achieve the connection and conduction between the mesh cover 3 and the second conductive structure 62, and then the second conductive structure 62 itself is located in the cavity so that it can directly contact and conduct with the back plate 2, or the second conductive structure 62 can be connected to the back plate 2 through fastening connectors such as bolts, and finally the conduction between the mesh cover 3 and the back plate 2 is achieved to ground the mesh cover 3, thereby reducing or eliminating the electromagnetic interference of the mesh cover 3 to the laser projection device.

[0084] Exemplarily, the avoidance hole 43 may be a square hole or a circular hole. The specific shape of the avoidance hole 43 may be set according to actual needs, and this embodiment does not specifically limit this.

[0085] In addition, in order to facilitate the bending structure 31 to pass through the avoidance hole 43, the inner contour size of the avoidance hole 43 can be set to be larger than the outer contour size of the bending structure 31. The specific inner contour size of the avoidance hole 43 and the outer contour size of the bending structure 31 or the size difference between the two can be set according to actual needs, and this embodiment does not make any specific limitations on this.

[0086] Exemplarily, the bending structure 31 can be a bending piece arranged on the outer edge of the mesh cover 3, and the bending piece can be bent at 90° with the outer edge of the mesh cover 3, so that the bending piece can pass through the avoidance hole 43 and enter the cavity to connect with the second conductive structure 62.

[0087] Alternatively, in other implementations, the bending structure 31 may be an extension column arranged on the outer edge of the mesh cover 3, and the extension column may pass through the avoidance hole 43 and be connected to the second conductive structure 62. At this time, the extension column may be directly clamped in the second assembly hole of the second conductive structure 62, thereby achieving connection and conduction between the mesh cover 3 and the second conductive structure 62.

[0088] Exemplarily, the extension column may be a threaded column, in which case the second assembly hole may be a threaded hole that matches the threaded column, so that the threaded column and the threaded hole are threadedly matched to achieve connection and conduction between the mesh cover 3 and the second conductive structure 62. Alternatively, the extension column may be a columnar structure with a smooth outer wall surface, in which case the second assembly hole may also be a light hole, so that the extension column can be inserted into the light hole to achieve connection and conduction between the mesh cover 3 and the second conductive structure 62.

[0089] Furthermore, the bending structure 31 can be set to one or more. When it is set to multiple, multiple bending structures 31 can be arranged at circumferential intervals along the mesh cover 3, so that connection and conduction can be achieved with the second conductive structure 62 through multiple bending structures 31, so as to further improve the reliability and stability of the electrical conduction between the mesh cover 3 and the second conductive structure 62 and prevent the occurrence of poor conductivity problems.

[0090] It should be noted that when there are multiple bending structures 31, there can also be multiple avoidance holes 43, and the multiple avoidance holes 43 are arranged one-to-one correspondingly to the multiple bending structures 31, so that the multiple bending structures 31 can be connected to the second conductive structure 62 after passing through the corresponding avoidance holes 43.

[0091] In specific implementation, the mesh cover 3 and the bending structure 31 can be integrally formed, thereby saving manufacturing steps and improving the overall structural strength of the mesh cover 3. Alternatively, the mesh cover 3 and the bending structure 31 can be formed separately and then welded or clamped together.

[0092] When a bending structure 31 is provided on the mesh cover 3 to be connected to the second conductive structure 62, in addition to providing an avoidance hole 43 on the shell 4 so that the bending structure 31 enters the cavity and is connected to the second conductive structure 62, the avoidance hole 43 may not be provided on the shell 4. In this case, the bending structure 31 of the mesh cover 3 can directly pass through the gap between the top cover assembly 1 and the shell 4 to enter the cavity and then be connected to the second conductive structure 62.

[0093] In summary, the fourth laser projection device provided in this embodiment forms a grounding loop by connecting the mesh cover 3 and the back plate 2 through the second conductive structure 62, so that only the mesh cover 3 can be grounded, thereby effectively solving the problem of electromagnetic interference of the mesh cover 3 to the laser projection device.

[0094] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

[0095] For ease of explanation, the above description has been made in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are intended to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different variations of the embodiments suitable for specific use considerations.

Claims

1. A laser projection device, characterized in that: It includes a top cover assembly, a back plate, a conductive mesh cover and a shell; The top cover assembly and the back plate are made of metal material; The shell has an opening, the top cover assembly is covered at the opening and encloses a cavity together with the shell, the mesh cover is arranged around the outer periphery of the shell, the back plate is located in the cavity, and a lens assembly is arranged on one side of the back plate facing the top cover assembly; A first conductive structure is disposed in the cavity, at least a portion of the first conductive structure is located on a side of the housing away from the light emitting surface of the lens assembly, and the first conductive structure is connected to the top cover assembly and the back plate respectively.

2. The laser projection device according to claim 1, characterized in that: The first conductive structure includes a conductive shielding cover assembly and a first conductive connector. The shielding cover assembly is located on the side of the shell body away from the light-emitting surface of the lens assembly and is connected to the back plate. The first conductive connector is respectively connected to the top cover assembly and the shielding cover assembly.

3. The laser projection device according to claim 2, characterized in that: The first conductive connecting member includes a conductive foam disposed between the top cover assembly and the shielding cover assembly, and the conductive foam is connected to the top cover assembly and the shielding cover assembly respectively.

4. The laser projection device according to any one of claims 1 to 3, characterized in that: The top cover assembly includes a first fixed cover plate, a second fixed cover plate and a sliding cover plate, wherein the first fixed cover plate and the second fixed cover plate are sequentially arranged in a direction from the front side to the rear side of the laser projection device, and the sliding cover plate is arranged on the second fixed cover plate and can reciprocate relative to the first fixed cover plate in a direction from the front side to the rear side of the laser projection device to cover the opening or leave the opening in an open state.

5. The laser projection device according to claim 4, characterized in that: The second fixed cover plate is connected to the shielding cover assembly via the first conductive connector; The sliding cover plate is provided with a first mounting hole, the second fixed cover plate is provided with a second mounting hole, and the sliding cover plate is connected to the second fixed cover plate via a mounting connector penetrating through the first mounting hole and the second mounting hole.

6. The laser projection device according to claim 4, characterized in that: The mesh cover is made of metal material, and a second conductive connector is provided between the mesh cover and the top cover assembly. The side of the mesh cover close to the top cover assembly is connected to the second conductive connector, and the second conductive connector is respectively connected to the first fixed cover plate and the second fixed cover plate.

7. The laser projection device according to claim 6, characterized in that: The second conductive connecting member is located in the cavity; The outer edge of the mesh cover is provided with at least two bending structures extending toward the cavity, and at least two of the bending structures are located at different positions of the outer edge of the mesh cover. The shell is provided with avoidance holes corresponding to each of the bending structures for allowing the bending structures to enter the cavity, and each of the bending structures is connected to the second conductive connecting piece.

8. The laser projection device according to claim 7, characterized in that: The second conductive connecting member includes at least two metal members, and the at least two metal members are arranged at intervals along the circumference of the shell; A first connecting hole is provided at one end of the metal part close to the first fixing cover plate, a second connecting hole is provided at a position on the first fixing cover plate corresponding to the first connecting hole, and the metal part is connected to the first fixing cover plate by a first fastener penetrating through the first connecting hole and the second connecting hole; and / or a third connecting hole is provided at one end of the metal part close to the second fixing cover plate, a fourth connecting hole is provided at a position on the second fixing cover plate corresponding to the third connecting hole, and the metal part is connected to the second fixing cover plate by a second fastener penetrating through the third connecting hole and the fourth connecting hole.

9. The laser projection device according to claim 6, characterized in that: The second conductive connecting member is a wire, and the outer edge of the mesh cover is provided with a tongue extending toward the cavity. A avoidance hole for allowing the tongue to enter the cavity is provided at a position corresponding to the tongue on the shell, the tongue is connected to the first fixed cover plate, and the wire is respectively connected to the tongue and the second fixed cover plate.

10. The laser projection device according to claim 9, characterized in that: A first reserved hole is provided on the latch tongue, a second reserved hole is provided on the first fixed cover plate at a position corresponding to the first reserved hole, and the latch tongue is connected to the first fixed cover plate via a reserved connecting piece passing through the first reserved hole and the second reserved hole.

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