Panel assembly with anti-crosstalk structure and power electronic device

Abstract

The application provides a panel assembly with an anti-crosstalk structure and a power electronic device, and belongs to the technical field of power electronic devices. The panel assembly comprises a panel, a printed board provided with a light-emitting device, a light guide column for transmitting light emitted by the light-emitting device to a corresponding position on the panel, and a light shielding cylinder arranged between the panel and the printed board and sleeved outside the light-emitting device and the light guide column. A fixing structure for fixing connection between the panel and the printed board is arranged between the panel and the printed board. An end surface of the light shielding cylinder facing the printed board is in contact with the printed board. An end surface of the light shielding cylinder facing the panel is in contact with the panel, or the panel assembly further comprises a limiting piece connected with the light shielding cylinder, and two ends of the limiting piece are in contact with the panel and the printed board respectively, so as to limit the spacing between the panel and the printed board. Compared with the prior art, the panel assembly has the advantages of simple structure, small size, time and labor saving in installation, no influence on the existing structures of the printed board and the panel, and effective avoidance of the crosstalk problem between the LED lamps.

Description

Technical Field

[0001] This invention relates to a panel assembly with an anti-crosslight structure and a power electronic device, belonging to the field of power electronic device technology. Background Technology

[0002] Currently, in power electronic panel structures, through-hole LEDs are mostly used as display lights. At the same time, in order to prevent the light from the lit LEDs from shining on other unlit LEDs or their light guide structures, so that the unlit LEDs in the panel display lights have a certain brightness due to light crosstalk, which may cause users to make incorrect judgments, many panel components are now designed with anti-light crosstalk structures.

[0003] For example, Chinese invention patent application CN111928207A discloses an anti-crosslight structure installed on an LED lamp, which includes multiple LED lamps, multiple anti-crosslight structural components, and light guide columns. The multiple LED lamps are soldered onto a printed circuit board. The anti-crosslight structural components are cylindrical and fitted onto the LED lamps. The light guide columns are installed on the anti-crosslight structural components, and a panel is installed at the head of the light guide columns. The light guide columns are used to transmit the light emitted by the LED lamps to the corresponding positions on the panel.

[0004] The aforementioned LEDs are through-hole type. When soldering them onto the printed circuit board (PCB), the height of each LED must be carefully controlled. Inconsistent heights will affect the subsequent installation of the anti-crossing light structure and the panel. Furthermore, the soldering process for through-hole LEDs is complex, the LED orientation is prone to error, and soldering efficiency is low. Additionally, due to the gap between the anti-crossing light structure and the PCB, light emitted from the LEDs can travel between them, affecting other LEDs and their corresponding light guides, resulting in poor anti-crossing performance. Moreover, the lack of positioning and fixing measures between the panel and the PCB allows for relative movement, affecting the panel's usability and even the reliability of the connection between the LEDs and the PCB. Summary of the Invention

[0005] The purpose of this invention is to provide a panel assembly with an anti-crosslight structure to solve the problems of poor anti-crosslight effect in the prior art and the relative movement between the panel and the printed circuit board affecting the performance and connection reliability; the purpose of this invention is also to provide a power electronic device to solve the above problems.

[0006] To achieve the above objectives, the panel assembly with anti-crosslight structure in this invention adopts the following technical solution:

[0007] A panel assembly with an anti-light crosstalk structure includes a panel, a printed circuit board with light-emitting devices, a light guide post for transmitting light emitted by the light-emitting devices to a corresponding position on the panel, and a light-shielding tube disposed between the panel and the printed circuit board and sleeved outside the light-emitting devices and the light guide post. A fixing structure is provided between the panel and the printed circuit board to achieve a fixed connection between the two. The end face of the light-shielding tube facing the printed circuit board contacts the printed circuit board; the end face of the light-shielding tube facing the panel contacts the panel. Alternatively, the panel assembly also includes a limiting member connected to the light-shielding tube, with both ends of the limiting member contacting the panel and the printed circuit board respectively to limit the distance between the panel and the printed circuit board.

[0008] The beneficial effects of the above technical solution are as follows: Because a fixing structure is provided between the panel and the printed circuit board to achieve a fixed connection between them, it ensures that there will be no relative movement between the panel and the printed circuit board, avoiding affecting the panel's performance and the reliability of the connection between the light-emitting device and the printed circuit board; the end face of the light-shielding tube facing the printed circuit board contacts the printed circuit board, thus completely enclosing the light-emitting device on the printed circuit board, avoiding affecting other light-emitting devices and corresponding light guide pillars, resulting in better anti-light crosstalk; the end face of the light-shielding tube facing the panel contacts the panel, or the panel assembly also includes a limiting component connected to the light-shielding tube, with both ends of the limiting component contacting the panel and the printed circuit board respectively, to limit the distance between the panel and the printed circuit board. This ensures that the panel and the printed circuit board will not move relative to each other, and also ensures that the light-shielding tube will not leave the printed circuit board, keeping the light-shielding tube in constant contact with the printed circuit board, thus ensuring the anti-light crosstalk effect.

[0009] Furthermore, the fixing structure includes a fixing post disposed on one of the panel and the printed circuit board and a fixing hole disposed on the other. The fixing post is provided with an external thread section passing through the fixing hole or the fixing post is provided with an internal thread hole corresponding to the fixing hole, so as to be connected with a nut or bolt.

[0010] The advantages of the above technical solution are: the fixing structure consists of fixing columns and fixing holes, which is simple in structure and convenient for processing, manufacturing and assembly of panel components.

[0011] Furthermore, the panel assembly includes the aforementioned limiting member, which is a limiting cylinder with a through hole, and the fixing post passes through the through hole of the limiting cylinder.

[0012] The beneficial effects of the above technical solution are as follows: the limiting component is a limiting cylinder, and the fixing post is inserted into the through hole of the limiting cylinder to realize the positioning of the limiting cylinder, thereby realizing the positioning of the light shielding cylinder, which facilitates the assembly of the panel assembly, and at the same time can prevent the light shielding cylinder and the limiting cylinder from moving after assembly.

[0013] Furthermore, the length of the fixing post is not greater than the length of the limiting cylinder, and the fixing post is provided with the aforementioned internal threaded hole, which is a bolt hole for the bolt to pass through.

[0014] The advantages of the above technical solution are: simple structure, convenient processing, manufacturing and assembly.

[0015] Furthermore, the fixing post is disposed on the panel, and the fixing hole is disposed on the printed circuit board.

[0016] The beneficial effects of the above technical solution are as follows: as the surface structure of power electronic equipment, the panel can reduce the number of holes on the panel compared to setting the fixing holes on the panel, and at the same time, it can avoid the fasteners protruding outside the panel and affecting the aesthetics.

[0017] Furthermore, multiple light-shielding tubes are arranged in a straight line, with adjacent light-shielding tubes connected to each other. Two limiting tubes are provided, with the two limiting tubes located at both ends of a row of light-shielding tubes respectively.

[0018] The beneficial effects of the above technical solution are as follows: multiple light-shielding tubes arranged in a straight line can be adapted to multiple light-emitting devices, and there are two limiting tubes, which are located at both ends of a row of light-shielding tubes. This not only provides a better limiting effect and prevents the light-shielding tubes from moving after installation, but also facilitates installation and improves assembly efficiency.

[0019] Furthermore, the two limiting cylinders and each light-shielding cylinder are arranged in a straight line, and adjacent light-shielding cylinders and light-shielding cylinders are connected by connecting sections.

[0020] The beneficial effect of the above technical solution is that it facilitates processing and manufacturing.

[0021] Furthermore, the panel assembly includes the limiting member, the length of the light-shielding tube is greater than the length of the limiting member, and the panel is provided with an insertion hole for inserting the end of the light-shielding tube and an exposure hole for exposing the light guide column. The insertion hole and the exposure hole are connected and the inner diameter is greater than the inner diameter of the exposure hole.

[0022] The beneficial effects of the above technical solution are as follows: the length of the light-shielding tube is greater than the length of the limiting component, and the end of the light-shielding tube is inserted into the socket on the panel, which can prevent the light transmitted by the light guide column from affecting other light guide columns and improve the anti-light crosstalk effect.

[0023] Furthermore, the light device is a surface-mount LED lamp, and the inner hole of the light shield includes a first large hole section, a second large hole section at both ends, and a small hole section in the middle. The light-emitting device is located in the first large hole section, and the light guide post is installed in the small hole section and the second large hole section. A limiting step is formed between the small hole section and the second large hole section, and a stopping step that cooperates with the limiting step is provided on the light guide post.

[0024] The beneficial effects of the above technical solution are as follows: When surface-mount LED lights are soldered and fixed onto the printed circuit board, the disadvantages of the soldering process of through-hole LED lights can be overcome. Furthermore, surface-mount LED lights are close to the printed circuit board, eliminating the need for long light shields. This not only reduces the size of the light shield but also reduces the gap between the panel and the printed circuit board, saving space and resulting in a more compact structure. The stepped inner hole of the light shield not only facilitates the placement of the surface-mount LED light cover inside but also creates a limiting step that facilitates the installation of the light guide column.

[0025] To achieve the above objectives, the power electronic device of the present invention adopts the following technical solution:

[0026] A power electronic device includes a panel assembly. The panel assembly includes a panel, a printed circuit board with a light-emitting device, a light guide post for transmitting light emitted by the light-emitting device to a corresponding position on the panel, and a light-shielding tube disposed between the panel and the printed circuit board and sleeved outside the light-emitting device and the light guide post. A fixing structure is provided between the panel and the printed circuit board for fixing them together. The end face of the light-shielding tube facing the printed circuit board contacts the printed circuit board. The end face of the light-shielding tube facing the panel contacts the panel. Alternatively, the panel assembly also includes a limiting member connected to the light-shielding tube, with both ends of the limiting member contacting the panel and the printed circuit board respectively to limit the distance between the panel and the printed circuit board.

[0027] The beneficial effects of the above technical solution are as follows: Because a fixing structure is provided between the panel and the printed circuit board to achieve a fixed connection between them, it ensures that there will be no relative movement between the panel and the printed circuit board, avoiding affecting the panel's performance and the reliability of the connection between the light-emitting device and the printed circuit board; the end face of the light-shielding tube facing the printed circuit board contacts the printed circuit board, thus completely enclosing the light-emitting device on the printed circuit board, avoiding affecting other light-emitting devices and corresponding light guide pillars, resulting in better anti-light crosstalk; the end face of the light-shielding tube facing the panel contacts the panel, or the panel assembly also includes a limiting component connected to the light-shielding tube, with both ends of the limiting component contacting the panel and the printed circuit board respectively, to limit the distance between the panel and the printed circuit board. This ensures that the panel and the printed circuit board will not move relative to each other, and also ensures that the light-shielding tube will not leave the printed circuit board, keeping the light-shielding tube in constant contact with the printed circuit board, thus ensuring the anti-light crosstalk effect.

[0028] Furthermore, the fixing structure includes a fixing post disposed on one of the panel and the printed circuit board and a fixing hole disposed on the other. The fixing post is provided with an external thread section passing through the fixing hole or the fixing post is provided with an internal thread hole corresponding to the fixing hole, so as to be connected with a nut or bolt.

[0029] The advantages of the above technical solution are: the fixing structure consists of fixing columns and fixing holes, which is simple in structure and convenient for processing, manufacturing and assembly of panel components.

[0030] Furthermore, the panel assembly includes the aforementioned limiting member, which is a limiting cylinder with a through hole, and the fixing post passes through the through hole of the limiting cylinder.

[0031] The beneficial effects of the above technical solution are as follows: the limiting component is a limiting cylinder, and the fixing post is inserted into the through hole of the limiting cylinder to realize the positioning of the limiting cylinder, thereby realizing the positioning of the light shielding cylinder, which facilitates the assembly of the panel assembly, and at the same time can prevent the light shielding cylinder and the limiting cylinder from moving after assembly.

[0032] Furthermore, the length of the fixing post is not greater than the length of the limiting cylinder, and the fixing post is provided with the aforementioned internal threaded hole, which is a bolt hole for the bolt to pass through.

[0033] The advantages of the above technical solution are: simple structure, convenient processing, manufacturing and assembly.

[0034] Furthermore, the fixing post is disposed on the panel, and the fixing hole is disposed on the printed circuit board.

[0035] The beneficial effects of the above technical solution are as follows: as the surface structure of power electronic equipment, the panel can reduce the number of holes on the panel compared to setting the fixing holes on the panel, and at the same time, it can avoid the fasteners protruding outside the panel and affecting the aesthetics.

[0036] Furthermore, multiple light-shielding tubes are arranged in a straight line, with adjacent light-shielding tubes connected to each other. Two limiting tubes are provided, with the two limiting tubes located at both ends of a row of light-shielding tubes respectively.

[0037] The beneficial effects of the above technical solution are as follows: multiple light-shielding tubes arranged in a straight line can be adapted to multiple light-emitting devices, and there are two limiting tubes, which are located at both ends of a row of light-shielding tubes. This not only provides a better limiting effect and prevents the light-shielding tubes from moving after installation, but also facilitates installation and improves assembly efficiency.

[0038] Furthermore, the two limiting cylinders and each light-shielding cylinder are arranged in a straight line, and adjacent light-shielding cylinders and light-shielding cylinders are connected by connecting sections.

[0039] The beneficial effect of the above technical solution is that it facilitates processing and manufacturing.

[0040] Furthermore, the panel assembly includes the limiting member, the length of the light-shielding tube is greater than the length of the limiting member, and the panel is provided with an insertion hole for inserting the end of the light-shielding tube and an exposure hole for exposing the light guide column. The insertion hole and the exposure hole are connected and the inner diameter is greater than the inner diameter of the exposure hole.

[0041] The beneficial effects of the above technical solution are as follows: the length of the light-shielding tube is greater than the length of the limiting component, and the end of the light-shielding tube is inserted into the socket on the panel, which can prevent the light transmitted by the light guide column from affecting other light guide columns and improve the anti-light crosstalk effect.

[0042] Furthermore, the light device is a surface-mount LED lamp, and the inner hole of the light shield includes a first large hole section, a second large hole section at both ends, and a small hole section in the middle. The light-emitting device is located in the first large hole section, and the light guide post is installed in the small hole section and the second large hole section. A limiting step is formed between the small hole section and the second large hole section, and a stopping step that cooperates with the limiting step is provided on the light guide post.

[0043] The beneficial effects of the above technical solution are as follows: When surface-mount LED lights are soldered and fixed onto the printed circuit board, the disadvantages of the soldering process of through-hole LED lights can be overcome. Furthermore, surface-mount LED lights are close to the printed circuit board, eliminating the need for long light shields. This not only reduces the size of the light shield but also reduces the distance between the panel and the printed circuit board, saving space and resulting in a more compact structure. The stepped inner hole of the light shield not only facilitates the placement of the surface-mount LED light cover but also creates a limiting step that facilitates the installation of the light guide column. Attached Figure Description

[0044] Figure 1 This is a partial perspective view of the panel assembly with an anti-light-crossing structure in this invention;

[0045] Figure 2 This is a partial exploded view of the panel assembly with anti-light crosstalk structure in this invention;

[0046] Figure 3 for Figure 1 and Figure 2 A three-dimensional view of the central shading row;

[0047] Figure 4 for Figures 1-3 Cross-sectional view of the central shading row;

[0048] Figure 5 for Figure 1 and Figure 2 Structural diagram of the central optical guide column.

[0049] In the diagram: 1. Panel; 11. Exposed hole; 12. Fixing post; 2. Printed circuit board; 21. Fixing hole; 3. Surface mount LED light; 4. Light guide post; 41. Stop step; 5. Light shielding row; 51. Light shielding tube; 511. First large hole section; 512. Second large hole section; 513. Small hole section; 52. Limiting tube; 53. Connecting section. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0051] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0052] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any actual relationship or order between these entities or operations. Furthermore, terms such as "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0053] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0054] An embodiment of the panel assembly (hereinafter referred to as panel assembly) with anti-crosslight structure in this invention:

[0055] like Figure 1 and Figure 2 As shown, the panel assembly includes a panel 1, a printed circuit board 2 with light-emitting devices, a light guide post 4 for transmitting the light emitted by the light-emitting devices to a corresponding position on the panel 1, and a light-shielding row 5 disposed between the panel 1 and the printed circuit board 2.

[0056] Specifically, in this embodiment, the light-emitting device is a surface-mount LED 3. There are multiple surface-mount LEDs 3 arranged in a straight line. They are soldered to the printed circuit board 2 by a pick-and-place machine and reflow soldering. This soldering method can overcome the disadvantages of the soldering process of through-hole LEDs and solve problems such as complex soldering process, difficulty in unifying lamp height, easy error in soldering direction, and low soldering efficiency of through-hole LEDs.

[0057] A fixing structure is provided between panel 1 and printed circuit board 2 to achieve a fixed connection between the two, ensuring that there is no relative movement between panel 1 and printed circuit board 2. Specifically, in this embodiment, the fixing structure includes fixing posts 12 provided on panel 1 and fixing holes 21 provided on printed circuit board 2, with two fixing posts 12 and two fixing holes 21 respectively. During panel assembly, fixing posts 12 contact the surface of printed circuit board 2, and fixing posts 12 are provided with internal threaded holes corresponding to fixing holes 21 for connection with bolts, that is, fixing holes 21 are bolt holes for bolts to pass through.

[0058] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the light-shielding row 5 includes multiple light-shielding tubes 51 arranged in a straight line. In this embodiment, there are 10 light-shielding tubes 51. The light-shielding row 5 also includes two limiting tubes 52 located at both ends of the row of light-shielding tubes 51. The two limiting tubes 52 and each light-shielding tube 51 are also arranged in a straight line. Adjacent light-shielding tubes 51 and light-shielding tubes 51 and limiting tubes 52 are connected by connecting sections 53, ensuring that the spacing between two adjacent light-shielding tubes 51 matches the spacing between the surface-mounted LED lights 3. At the same time, the light-shielding row 5 in this embodiment is made of black nylon and is integrally molded to block light leakage.

[0059] The aforementioned limiting cylinder 52 constitutes a limiting component connected to the light-shielding cylinder 51. During assembly, the two end faces of the limiting cylinder 52 contact the panel 1 and the printed circuit board 2 respectively to limit the distance between the panel 1 and the printed circuit board 2. That is, the length of the limiting cylinder 52 is equal to the length of the fixing post 12. Since the limiting cylinder 52 has a through hole, the fixing post 12 can be inserted into the through hole of the limiting cylinder 52, thereby positioning the limiting cylinder 52 during the assembly process, that is, positioning the light-shielding row 5, thus facilitating assembly.

[0060] The end faces of each light-shielding tube 51 and the two limiting tubes 52 facing the printed circuit board 2 are flush. Therefore, during assembly, the end faces of each light-shielding tube 51 facing the printed circuit board 2 are in close contact with the printed circuit board 2, thus completely encasing the surface-mount LED 3 without affecting other surface-mount LEDs 3 and the corresponding light guide pillars 4, resulting in better anti-cross-light effect. In addition, the length of the light-shielding tube 51 is greater than the length of the limiting tube 52. The panel 1 is provided with a socket (not shown in the figure) for inserting the end of the light-shielding tube 52 and an exposure hole 11 for exposing the light guide pillar 4. The socket and the exposure hole 11 are connected and the inner diameter is larger than the inner diameter of the exposure hole 11. This can prevent the light transmitted by the light guide pillar 4 from affecting other light guide pillars and improve the anti-cross-light effect.

[0061] like Figure 4As shown, the inner hole of the light-shielding tube 51 includes a first large hole section 511 at both ends, a second large hole section 512, and a small hole section 513 in the middle. The surface-mount LED 3 is located inside the first large hole section 511, which ensures a good anti-light crosstalk effect and prevents the tube wall of the light-shielding tube 51 from pressing on the surface-mount LED 3 and causing it to be damaged. In addition, since the surface-mount LED 3 is small in size and is closely attached to the printed circuit board 2, a long first large hole section 511 is not required. This not only reduces the length of the light-shielding tube 51 but also reduces the distance between the panel 1 and the printed circuit board 2, saving space and making the structure more compact.

[0062] The light guide post 4 is made of transparent PC material, which can conduct the light emitted by the surface-mount LED light 3. Its head is frosted and passes precisely through the exposed hole 11 on the panel 1. Specifically, the light guide post 4 is interference-fitted into the small hole section 513 and the second large hole section 512, ensuring that the position of the light guide post 4 does not change, thus making the conduction of light from the surface-mount LED light 3 more uniform. Furthermore, a limiting step is formed between the small hole section 513 and the second large hole section 512, and the light guide post 4 is provided with a stopping step 41 that cooperates with the limiting step. Figure 5 As shown, this allows for convenient installation and positioning of the light guide post 4.

[0063] The assembly process of the panel assembly in this invention is as follows:

[0064] First, the surface-mount LEDs 3 are soldered to the printed circuit board 2 using a pick-and-place machine and reflow soldering. Then, 10 light guides 4 and light shields 5 are assembled into a unit. This unit is then mounted on the fixing posts 12 of the panel 1, meaning the fixing posts 12 on the panel 1 pass through the limiting sleeves 52 at both ends of the light shields 5. Finally, the soldered printed circuit board 2 is connected to the fixing posts 12 on the panel 1 using bolts. The overall structure after assembly is as follows: Figure 1 As shown.

[0065] Compared with the prior art, the panel assembly of the present invention has a simple structure, small size, saves time and effort in installation, does not affect the printed circuit board and the existing structure of the panel, and can effectively avoid the problem of light crosstalk between LEDs.

[0066] In other embodiments of the panel assembly with anti-light-crossing structure: the LED lamp can also be a through-hole LED lamp, just like in the prior art. In this case, in order to ensure that the light shield can completely cover the LED lamp and contact the printed circuit board, the light shield needs to be set to be longer and the inner hole needs to be set to be larger.

[0067] In other embodiments of the panel assembly with anti-crosstalk structure: the light-emitting device may not be an LED lamp, but other types of lamps, such as tungsten filament lamps.

[0068] In other embodiments of the panel assembly with anti-light-crossing structure: depending on the specific structure of the light guide column, the inner hole structure of the light shield tube can be changed accordingly. For example, when the light guide column only includes a large diameter section and a small diameter section, the inner hole of the light shield tube can also only include a large diameter hole and a small diameter hole.

[0069] In other embodiments of the panel assembly with an anti-light-crossing structure: the length of the light-shielding tube can also be equal to the length of the limiting tube, in which case the two end faces of the light-shielding tube are in contact with the panel and the printed circuit board, respectively.

[0070] In other embodiments of the panel assembly with an anti-light-crossing structure: the two limiting tubes and the row of light-shielding tubes may not be arranged in a straight line. For example, the arrangement direction between the limiting tubes and the end light-shielding tubes may be perpendicular to the arrangement direction of the row of light-shielding tubes.

[0071] In other embodiments of the panel assembly with anti-crosslight structure: depending on the arrangement of the light-emitting devices, the multiple light-shielding tubes may not be arranged in a straight line, but may be arranged in a circle or a rectangle; when there are multiple light-shielding tubes, there may be no connecting section between adjacent light-shielding tubes or between a light-shielding tube and a limiting tube, but they may be directly connected as a whole, and the limiting tube may not be at both ends, but in the middle, or there may be only one limiting tube; in addition, when there are multiple light-shielding tubes, adjacent light-shielding tubes may not be connected and may be independent of each other, in which case each light-shielding tube may be connected to a limiting tube.

[0072] In other embodiments of the panel assembly with an anti-light-crossing structure: the fixing posts can be disposed on the printed circuit board, in which case the fixing holes are disposed on the panel.

[0073] In other embodiments of the panel assembly with an anti-light-crossing structure: when the fixing post is provided with an internal threaded hole, the length of the fixing post may also be less than the length of the limiting cylinder.

[0074] In other embodiments of the panel assembly with an anti-light-crossing structure: when the panel assembly includes a limiting member, the limiting member may not be a limiting cylinder, but a limiting post. In this case, the fixing post does not pass through the limiting post, but is arranged side by side with it.

[0075] In other embodiments of the panel assembly with an anti-light-crossing structure: an external threaded section can also be provided on the fixing post. In this case, the external threaded section needs to pass through the fixing hole and be connected with the nut. In this case, the panel assembly may not include a limiting member. For example, a stepped surface can be provided on the fixing post. When the external threaded section passes through the fixing hole, the stepped surface is stopped and engaged with the surface of the printed circuit board or the panel, thereby limiting the distance between the panel and the printed circuit board. Of course, the panel assembly may also include a limiting member to limit the distance between the panel and the printed circuit board. In this case, there is no need to provide a stepped surface on the fixing post.

[0076] In other embodiments of the panel assembly with anti-light-crossing structure: the fixing structure may not be a fixing post on one of the panel and the printed circuit board and a fixing hole on the other, but rather a fixing block sandwiched between the panel and the printed circuit board. The fixing block restricts the distance between the two and is threadedly connected to the fixing block by bolts passing through the panel. At the same time, another bolt passes through the printed circuit board and is threadedly connected to the fixing block, thereby achieving a fixed connection between the panel and the printed circuit board. Of course, the fixing structure can also be in other forms, such as a screw that passes through the panel and the printed circuit board, with nuts connected to both sides of the panel and both sides of the printed circuit board on the screw, i.e., four nuts connected to one screw. The panel and the printed circuit board are fixed by tightening the nuts, and the distance between the panel and the printed circuit board is adjusted by adjusting the position of the nuts.

[0077] In other embodiments of the panel assembly with an anti-light-crossing structure: when the panel assembly does not include a limiting member, a light-shielding tube can be used to limit the distance between the panel and the printed circuit board. In this case, the end face of the light-shielding tube facing the printed circuit board contacts the printed circuit board, and the end face of the light-shielding tube facing the panel contacts the panel.

[0078] An embodiment of the power electronic device in this invention is as follows: The power electronic device includes a panel assembly, and the specific structure of the panel assembly is the same as that of the panel assembly with anti-crossing light structure in any of the above embodiments, and will not be repeated here.

[0079] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. A panel assembly with an anti-cross-light structure, the panel assembly comprising a panel (1), a printed circuit board (2) housing a light-emitting device, a light guide post (4) for transmitting light emitted by the light-emitting device to a corresponding position on the panel (1), and a light-shielding tube (51) disposed between the panel (1) and the printed circuit board (2) and sleeved outside the light-emitting device and the light guide post (4), characterized in that: The panel (1) and the printed circuit board (2) are provided with a fixing structure for fixing the two together. The end face of the light shield (51) facing the printed circuit board (2) contacts the printed circuit board (2). The panel assembly also includes a limiting tube connected to the light shield (51). The two end faces of the limiting tube contact the panel (1) and the printed circuit board (2) respectively to limit the distance between the panel (1) and the printed circuit board (2). The fixing structure includes a fixing post provided on one of the panel and the printed circuit board and a fixing hole provided on the other. The fixing post passes through the limiting tube and has an external thread section that passes through the fixing hole to connect with a nut so as to clamp and fix the limiting tube between the panel and the printed circuit board.

2. The panel assembly with anti-crosslight structure according to claim 1, characterized in that: The fixing post (12) is set on the panel (1), and the fixing hole (21) is set on the printed circuit board (2).

3. The panel assembly with anti-crosslight structure according to claim 1, characterized in that: Multiple light-shielding tubes (51) are arranged in a straight line, and adjacent light-shielding tubes (51) are connected to each other. There are two limiting tubes (52), which are located at the two ends of a row of light-shielding tubes (51).

4. The panel assembly with anti-crosslight structure according to claim 3, characterized in that: The two limiting cylinders (52) and each light-shielding cylinder (51) are arranged in a straight line. The adjacent light-shielding cylinders (51) and the light-shielding cylinders (51) and the limiting cylinders (52) are connected by connecting sections (53).

5. The panel assembly with anti-crosslight structure according to claim 1, characterized in that: The length of the light-shielding tube (51) is greater than the length of the limiting tube. The panel (1) is provided with an insertion hole for inserting the end of the light-shielding tube (51) and an exposure hole (11) for exposing the light guide column (4). The insertion hole and the exposure hole (11) are connected and the inner diameter is greater than the inner diameter of the exposure hole (11).

6. The panel assembly with anti-crosslight structure according to claim 1, characterized in that: The light-emitting device is a surface-mount LED lamp (3). The inner hole of the light-shielding tube (51) includes a first large hole section (511) and a second large hole section (512) located at both ends and a small hole section (513) located in the middle. The light-emitting device is located in the first large hole section (511). The light guide column (4) is installed in the small hole section (513) and the second large hole section (512). A limiting step is formed between the small hole section (513) and the second large hole section (512). A stopping step (41) is provided on the light guide column (4) to cooperate with the stopping step.

7. A panel assembly with an anti-cross-light structure, the panel assembly comprising a panel (1), a printed circuit board (2) housing a light-emitting device, a light guide post (4) for transmitting light emitted by the light-emitting device to a corresponding position on the panel (1), and a light-shielding tube (51) disposed between the panel (1) and the printed circuit board (2) and sleeved outside the light-emitting device and the light guide post (4), characterized in that: The panel (1) and the printed circuit board (2) are provided with a fixing structure for fixing the two together. The end face of the light shield (51) facing the printed circuit board (2) contacts the printed circuit board (2). The panel assembly also includes a limiting tube connected to the light shield (51). The two end faces of the limiting tube contact the panel (1) and the printed circuit board (2) respectively to limit the distance between the panel (1) and the printed circuit board (2). The fixing structure includes a fixing post provided on one of the panel and the printed circuit board and a fixing hole provided on the other. The fixing post passes through the limiting tube and the length of the fixing post is not greater than the length of the limiting tube. The fixing hole is a bolt hole for the bolt to pass through. The fixing post is provided with an internal thread hole corresponding to the fixing hole to be connected with the bolt to clamp and fix the limiting tube between the panel and the printed circuit board.

8. The panel assembly with anti-crosslight structure according to claim 7, characterized in that: The fixing post (12) is set on the panel (1), and the fixing hole (21) is set on the printed circuit board (2).

9. The panel assembly with anti-crosslight structure according to claim 7, characterized in that: Multiple light-shielding tubes (51) are arranged in a straight line, and adjacent light-shielding tubes (51) are connected to each other. There are two limiting tubes (52), which are located at the two ends of a row of light-shielding tubes (51).

10. The panel assembly with anti-crosslight structure according to claim 9, characterized in that: The two limiting cylinders (52) and each light-shielding cylinder (51) are arranged in a straight line. The adjacent light-shielding cylinders (51) and the light-shielding cylinders (51) and the limiting cylinders (52) are connected by connecting sections (53).

11. The panel assembly with anti-crosslight structure according to claim 7, characterized in that: The length of the light-shielding tube (51) is greater than the length of the limiting tube. The panel (1) is provided with an insertion hole for inserting the end of the light-shielding tube (51) and an exposure hole (11) for exposing the light guide column (4). The insertion hole and the exposure hole (11) are connected and the inner diameter is greater than the inner diameter of the exposure hole (11).

12. The panel assembly with anti-crosslight structure according to claim 7, characterized in that: The light-emitting device is a surface-mount LED lamp (3). The inner hole of the light-shielding tube (51) includes a first large hole section (511) and a second large hole section (512) located at both ends and a small hole section (513) located in the middle. The light-emitting device is located in the first large hole section (511). The light guide column (4) is installed in the small hole section (513) and the second large hole section (512). A limiting step is formed between the small hole section (513) and the second large hole section (512). A stopping step (41) is provided on the light guide column (4) to cooperate with the stopping step.

13. A power electronic device, comprising a panel assembly, the panel assembly comprising a panel (1), a printed circuit board (2) on which a light-emitting device is mounted, a light guide post (4) for transmitting light emitted by the light-emitting device to a corresponding position on the panel (1), and a light-shielding tube (51) disposed between the panel (1) and the printed circuit board (2) and sleeved outside the light-emitting device and the light guide post (4), characterized in that: The panel (1) and the printed circuit board (2) are provided with a fixing structure for fixing the two together. The end face of the light shield (51) facing the printed circuit board (2) contacts the printed circuit board (2). The panel assembly also includes a limiting tube connected to the light shield (51). The two end faces of the limiting tube contact the panel (1) and the printed circuit board (2) respectively to limit the distance between the panel (1) and the printed circuit board (2). The fixing structure includes a fixing post provided on one of the panel and the printed circuit board and a fixing hole provided on the other. The fixing post passes through the limiting tube and has an external thread section that passes through the fixing hole to connect with a nut so as to clamp and fix the limiting tube between the panel and the printed circuit board.

14. The power electronic device according to claim 13, characterized in that: The fixing post (12) is set on the panel (1), and the fixing hole (21) is set on the printed circuit board (2).

15. The power electronic device according to claim 13, characterized in that: Multiple light-shielding tubes (51) are arranged in a straight line, and adjacent light-shielding tubes (51) are connected to each other. There are two limiting tubes (52), which are located at the two ends of a row of light-shielding tubes (51).

16. The power electronic device according to claim 15, characterized in that: The two limiting cylinders (52) and each light-shielding cylinder (51) are arranged in a straight line. The adjacent light-shielding cylinders (51) and the light-shielding cylinders (51) and the limiting cylinders (52) are connected by connecting sections (53).

17. The power electronic device according to claim 13, characterized in that: The length of the light-shielding tube (51) is greater than the length of the limiting tube. The panel (1) is provided with an insertion hole for inserting the end of the light-shielding tube (51) and an exposure hole (11) for exposing the light guide column (4). The insertion hole and the exposure hole (11) are connected and the inner diameter is greater than the inner diameter of the exposure hole (11).

18. The power electronic device according to claim 13, characterized in that: The light-emitting device is a surface-mount LED lamp (3). The inner hole of the light-shielding tube (51) includes a first large hole section (511) and a second large hole section (512) located at both ends and a small hole section (513) located in the middle. The light-emitting device is located in the first large hole section (511). The light guide column (4) is installed in the small hole section (513) and the second large hole section (512). A limiting step is formed between the small hole section (513) and the second large hole section (512). A stopping step (41) is provided on the light guide column (4) to cooperate with the stopping step.

19. A power electronic device, comprising a panel assembly, the panel assembly comprising a panel (1), a printed circuit board (2) on which a light-emitting device is mounted, a light guide post (4) for transmitting light emitted by the light-emitting device to a corresponding position on the panel (1), and a light-shielding tube (51) disposed between the panel (1) and the printed circuit board (2) and sleeved outside the light-emitting device and the light guide post (4), characterized in that: The panel (1) and the printed circuit board (2) are provided with a fixing structure for fixing the two together. The end face of the light shield (51) facing the printed circuit board (2) contacts the printed circuit board (2). The panel assembly also includes a limiting tube connected to the light shield (51). The two end faces of the limiting tube contact the panel (1) and the printed circuit board (2) respectively to limit the distance between the panel (1) and the printed circuit board (2). The fixing structure includes a fixing post provided on one of the panel and the printed circuit board and a fixing hole provided on the other. The fixing post passes through the limiting tube and the length of the fixing post is not greater than the length of the limiting tube. The fixing hole is a bolt hole for the bolt to pass through. The fixing post is provided with an internal thread hole corresponding to the fixing hole to be connected with the bolt to clamp and fix the limiting tube between the panel and the printed circuit board.

20. The power electronic device according to claim 19, characterized in that: The fixing post (12) is set on the panel (1), and the fixing hole (21) is set on the printed circuit board (2).

21. The power electronic device according to claim 19, characterized in that: Multiple light-shielding tubes (51) are arranged in a straight line, and adjacent light-shielding tubes (51) are connected to each other. There are two limiting tubes (52), which are located at the two ends of a row of light-shielding tubes (51).

22. The power electronic device according to claim 21, characterized in that: The two limiting cylinders (52) and each light-shielding cylinder (51) are arranged in a straight line. The adjacent light-shielding cylinders (51) and the light-shielding cylinders (51) and the limiting cylinders (52) are connected by connecting sections (53).

23. The power electronic device according to claim 19, characterized in that: The length of the light-shielding tube (51) is greater than the length of the limiting tube. The panel (1) is provided with an insertion hole for inserting the end of the light-shielding tube (51) and an exposure hole (11) for exposing the light guide column (4). The insertion hole and the exposure hole (11) are connected and the inner diameter is greater than the inner diameter of the exposure hole (11).

24. The power electronic device according to claim 19, characterized in that: The light-emitting device is a surface-mount LED lamp (3). The inner hole of the light-shielding tube (51) includes a first large hole section (511) and a second large hole section (512) located at both ends and a small hole section (513) located in the middle. The light-emitting device is located in the first large hole section (511). The light guide column (4) is installed in the small hole section (513) and the second large hole section (512). A limiting step is formed between the small hole section (513) and the second large hole section (512). A stopping step (41) is provided on the light guide column (4) to cooperate with the stopping step.

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