Light supplementing lamp module and self-service photographing equipment

Abstract

The utility model belongs to the technical field of self-service photographing equipment, and particularly relates to a light supplementing lamp module which comprises a back plate and a light-transmitting plate, an included angle is formed between the light-transmitting plate and the back plate, the light-transmitting plate is connected with the upper end of the back plate, the lower end of the light-transmitting plate is separated from the upper end of the back plate, and the back plate comprises a plurality of positioning columns arranged on the outer surface. The light supplementing lamp module further comprises a lamp shell assembly detachably connected to the light-transmitting plate, and the lamp shell assembly comprises a box-shaped containing cavity and further comprises an opening part attached to the light-transmitting plate. The light supplementing lamp module is convenient to install, disassemble and replace, is particularly suitable for scenes where light supplementing lamps need to be additionally arranged at an inclined angle, can be wholly disassembled for repair, and can be quickly repaired by replacing a light source in the lamp shell assembly. The utility model further relates to a self-service photographing device with the light supplementing lamp module.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of self-service photographing equipment, and particularly relates to a light supplementing lamp module. The utility model further relates to a self-service photographing equipment with the light supplementing lamp module. BACKGROUND

[0002] There are various devices with self-service photographing functions in the prior art, which are commonly arranged at subway stations, shopping malls and the like, including but not limited to certificate photographing devices and sticker game machines. The lamps attached to these devices are usually arranged at the upper middle part of the devices, and illuminate the user from above to below or from the front, which can illuminate the face, but can cause color difference at the junction between the face and the neck, and the skeleton of the face is obvious due to the lack of light below the face, which does not conform to the aesthetic preference of most end users and affects the profitability of the self-service photographing device. Therefore, some customers hope to add a set of light supplementing lamps that illuminate obliquely upward from below the face to improve the flatness of the face in the portrait. In addition to this angle, light supplementing lamps can also be added at other positions of the device to meet the diversified needs of customers.

[0003] There are various finished light sources in the prior art, such as light bars, light strips, LED lamp beads and the like, but the self-service photographing device has requirements on the appearance, and these finished light sources cannot be directly attached to the self-service photographing device and need to be integrated. Since the light source can be damaged, the integrated module also needs to be convenient to replace. UTILITY MODEL CONTENTS

[0004] To solve the above technical problems, it is necessary to provide a light supplementing lamp module convenient to install and replace and a self-service photographing device with the light supplementing lamp module.

[0005] To solve the above technical problems, the utility model provides the following technical scheme:

[0006] A light supplementing lamp module, comprising a back plate and a light-transmitting plate arranged at an angle with the back plate, the light-transmitting plate is connected with the upper end of the back plate and separated from the lower end, the back plate comprises a plurality of positioning columns arranged on the outer surface, the light supplementing lamp module further comprises a lamp shell assembly detachably connected to the light-transmitting plate, the lamp shell assembly comprises a box-shaped accommodating cavity and a mouth portion attached to the light-transmitting plate.

[0007] The light shell assembly is attached to the light transmission plate through conventional clamping, bolting and the like, and the light shell assembly can be easily attached to the light transmission plate. The light shell assembly is detachable, and the light source can be conveniently replaced when the light source fails. The back plate and the light transmission plate are arranged at an angle, and when the back plate is arranged against a plane, the light transmission plate is inclined at an angle relative to the plane, and the light emitted from the light shell assembly connected to the light transmission plate is emitted at an oblique angle. A plurality of positioning columns are arranged on the outer surface of the back plate, and when the light compensation lamp module is attached to the equipment, the positioning columns can be positioned through the positioning holes formed in the equipment, and the fastening member can be selected for fastening connection, so that the light compensation lamp module is simple to install and position.

[0008] Preferably, the left end and the right end of the light shell assembly are detachably connected with a sealing plate. In this structure, the two ends of the light compensation lamp module are closed by the sealing plate, and the built-in light shell assembly is hidden, which is more beautiful, and the sealing plate has a dustproof effect. Since the sealing plate is detachably connected to the two ends of the light shell assembly, when the light source built in the light shell assembly fails, the sealing plate can be removed to detach the light shell assembly.

[0009] Preferably, the light shell assembly comprises a light shell stud, the light compensation lamp module further comprises a light shell nut threadedly matched with the stud, the sealing plate is provided with a through hole corresponding to the light shell stud, the light shell stud passes through the through hole of the sealing plate, and the light shell nut is screwed on the light shell stud to fix the sealing plate on the light shell assembly. In this structure, the light shell stud plays an auxiliary positioning role, and the installation is facilitated.

[0010] Preferably, the sealing plate is triangular, and two edges of the sealing plate are respectively arranged on the back plate and the light transmission plate. In this structure, the sealing plate is arranged on the back plate and the light transmission plate, and the back plate and the light transmission plate together form a relatively stable light compensation lamp module frame, which is not easy to deform.

[0011] Preferably, the back plate and the light transmission plate are rectangular, and the sealing plate is a right-angled triangle. In this structure, the back plate, the light transmission plate and the sealing plate form a right triangular prism frame, and the structure is more stable.

[0012] Preferably, the light-transmitting plate has a viewing window for the upper surface of the lampshade to pass through, and a positioning stud is provided on the inner surface of the light-transmitting plate. The lamp housing assembly includes a lampshade and a lamp housing with overlapping openings. A through hole is provided through the overlapping opening of the lampshade and lamp housing. The supplementary lighting module also includes a fastening nut that is threadedly engaged with the positioning stud. After the positioning stud passes through the through hole, the fastening nut is tightened on the positioning stud, fixing the lamp housing assembly to the light-transmitting plate. In this structure, the lamp housing assembly is positioned by the positioning stud during installation, making installation relatively simple. Tightening the fastening nut during installation simultaneously closes the lamp housing assembly, and the lamp housing assembly naturally opens during disassembly, facilitating the inspection and maintenance of the light source inside the lamp housing assembly.

[0013] A self-service photo-taking device includes a machine base and a fill light module as described above, as well as fasteners that cooperate with the positioning posts. The machine base has several positioning holes corresponding to the positioning posts. After the positioning posts are inserted into the positioning holes, the fasteners, from inside the machine base, cooperate with the positioning posts to fix the fill light module onto the machine base. Because it includes the aforementioned fill light module, this self-service photo-taking device possesses all the beneficial technical effects brought by the fill light module, which will not be elaborated further here.

[0014] Preferably, the machine base includes a tabletop, the positioning hole is positioned above the tabletop, and after the positioning post is inserted into the positioning hole, the supplementary light module is supported by the tabletop, and the back plate is in contact with the surface of the machine base. In this structure, the supplementary light module is entirely supported by the tabletop, making the installation structure relatively stable, and the supplementary light module can therefore be made of heavier materials. The back plate is in contact with the surface of the machine base, resulting in a strong overall appearance of the machine base, and generally preventing displacement or deformation after installation. Existing machine bases generally have a display screen in front of the user and a printing outlet at the bottom of the machine base. There is a corner between the display screen and the bottom of the machine base; the supplementary light module can be placed at the corner, seamlessly added below the screen.

[0015] Preferably, the supplementary lighting module also includes hooks for users to temporarily hang their belongings. Most existing self-service photo booths are equipped with seats, allowing users to temporarily place their personal items. However, this results in the self-service photo booth being used as a rest area, impacting its profitability. To improve equipment utilization and avoid machine occupancy, some self-service photo booths have removed the seats, leaving users with nowhere to place their belongings and making use inconvenient. Adding hooks is necessary to improve the user experience. Attaching the hooks to the supplementary lighting module results in a more integrated appearance and easier replacement in case of damage.

[0016] Preferably, the hook is an extension of the light-transmitting plate, which extends along the table surface, extends forward beyond the table surface, bends downward, and extends from the left and right ends of the hanging portion to opposite sides. In this structure, the hook and the light-transmitting plate are integrally formed, providing a secure fixation. It can also be manufactured by bending a single metal plate, simplifying the process. The section of the light-transmitting plate extending along the table surface strengthens the fixing structure of the supplementary lighting module, enhancing its load-bearing capacity. The section extending forward beyond the table surface separates the hook portion from the machine, allowing for the hanging of items of a certain size. The hooks extending from the left and right ends of the light-transmitting plate provide ample hanging space, and the relatively short ends of individual hooks offer sufficient load-bearing capacity, meeting general needs.

[0017] Preferably, the light-transmitting plate further includes a fixing post, which is connected to the surface of the light-transmitting plate that is attached to the tabletop. The machine base is provided with a guide hole for the fixing post to pass through. Since the light-transmitting plate is made of metal and has a certain degree of elasticity, during installation, the fixing post can be passed through the guide hole to pre-fix the light-transmitting plate to the machine base first, and then the positioning post can be inserted into the positioning hole to fix the supplementary lighting module. This structure facilitates installation and enhances the load-bearing capacity of the supplementary lighting module. Attached Figure Description

[0018] The above and other objects, features, and advantages of this invention will become clearer through a more detailed description of the preferred embodiments shown in the accompanying drawings. The same reference numerals indicate the same parts throughout the drawings, and the drawings are not intentionally drawn to scale with actual dimensions; the focus is on illustrating the gist of this invention.

[0019] Figure 1 A schematic diagram of the overall structure of a preferred embodiment of the supplementary lighting module (the cover plate is not shown);

[0020] Figure 2 A schematic diagram of the overall structure of a preferred embodiment of a self-service photo-taking device;

[0021] Figure 3 This is a schematic diagram of the overall structure of the lamp housing assembly in a preferred embodiment (lamp housing studs and lamp housing nuts are not shown);

[0022] Figure 4 A schematic diagram of the overall structure of the fill light module is not shown in the preferred embodiment of the self-service photo-taking device.

[0023] Figure 5 This is a schematic diagram of the structure of the light-transmitting plate and the back plate in a preferred embodiment of the supplementary lighting module.

[0024] In the diagram: back plate 1, positioning post 11, light-transmitting plate 2, viewing window 20, hook 21, positioning stud 22, fastening nut 23, fixing post 24, lamp housing assembly 3, through hole 30, lamp cover 31, lamp housing 32, lamp housing stud 33, lamp housing nut 34, sealing plate 4, machine base 5, positioning hole 51, table surface 52, fastener 53, guide hole 54. Detailed Implementation

[0025] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be given below with reference to the accompanying drawings.

[0026] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to and integrated with the other element, or there may be an intervening element present. The terms "mounted," "one end," "the other end," and similar expressions used herein are for illustrative purposes only.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] refer to Figure 1 The supplementary lighting module of this utility model includes a back plate 1 and a light-transmitting plate 2 arranged at an angle to the back plate 1. The light-transmitting plate 2 is connected to the upper end of the back plate 1 and separated from the lower end. The back plate 1 includes a plurality of positioning posts 11 disposed on the outer surface. The supplementary lighting module also includes a lamp housing assembly 3 detachably connected to the light-transmitting plate 2. The lamp housing assembly 3 includes a box-shaped receiving cavity and an opening that is in contact with the light-transmitting plate 2.

[0029] In the supplementary lighting module provided by this utility model, the lamp housing assembly 3 has a box-shaped cavity for housing the finished light source. After the finished light source is lit, the light passes through the light-transmitting plate 2 for supplementary lighting. Since the opening of the lamp housing assembly 3 is attached to the light-transmitting plate 2, the lamp housing assembly 3 can be easily attached to the light-transmitting plate 2 by conventional snap-fit ​​or bolt-fit methods. Since the lamp housing assembly 3 is detachable, the light source can be easily replaced when it fails. The back plate 1 and the light-transmitting plate 2 are set at an angle. When the back plate 1 is attached to a plane, the light-transmitting plate 2 is tilted relative to the plane, and the light transmitted from the lamp housing assembly 3 connected to the light-transmitting plate 2 is emitted at an oblique angle. Since several positioning posts 11 are provided on the outer surface of the back plate 1, when the supplementary lighting module is attached to the equipment, it can be positioned by positioning holes 51 that cooperate with the positioning posts 11 on the equipment, or it can be fastened by external fasteners 53. The installation is simple and the positioning is accurate. The supplementary lighting module provided by this utility model is easy to install and replace, and is especially suitable for scenarios where supplementary lighting needs to be added at an angle. It can be completely removed for repair or quickly repaired by replacing the light source in the lamp housing assembly 3. In the preferred embodiment, the positioning hole 51 is an oblong hole, which can accommodate certain dimensional errors. The positioning post 11 is a stud. The supplementary lighting module is fastened to the machine base 5 by a nut that mates with the positioning post 11. In other embodiments, it can also be fixed by interference fit or snap-fit ​​between the positioning post 11 and the positioning hole 51. In the preferred embodiment, no base plate is provided. For structural reinforcement, a base plate can be added at the end where the back plate 1 and the light-transmitting plate 2 are separated. The supplementary lighting module can also be set into any other shape. In the preferred embodiment, the light-transmitting plate 2 is a metal plate with a window. In other embodiments, the light-transmitting plate 2 can also be a structure with a transparent window or other hollow structure. In the preferred embodiment, the light-transmitting plate 2 and the back plate 1 are made by bending a single metal plate without any joint marks. In other embodiments, it can also be made by splicing multiple plates.

[0030] In a preferred embodiment, a sealing plate 4 is detachably connected to the left and right ends of the lamp housing assembly 3. In this structure, both ends of the supplementary lighting module are sealed by the sealing plate 4, concealing the built-in lamp housing assembly 3 for a more aesthetically pleasing appearance, and the sealing plate 4 also provides dust protection. Since the sealing plate 4 is detachably connected to both ends of the lamp housing assembly 3, if the light source built into the lamp housing assembly 3 malfunctions, the sealing plate 4 can be removed to facilitate the disassembly of the lamp housing assembly 3.

[0031] In a preferred embodiment, the lamp housing assembly 3 includes a lamp housing stud 33, and the supplementary lighting module further includes a lamp housing nut 34 that is threadedly engaged with the stud. The sealing plate 4 has a through hole corresponding to the lamp housing stud 33, through which the lamp housing stud 33 protrudes from the sealing plate 4. The lamp housing nut 34 is tightened onto the lamp housing stud 33 to secure the sealing plate 4 to the lamp housing assembly 3. In this structure, the lamp housing stud 33 serves as an auxiliary positioning element, facilitating the installation of the sealing plate 4.

[0032] In a preferred embodiment, the sealing plate 4 is triangular, with two sides abutting against the back plate 1 and the light-transmitting plate 2, respectively. In this structure, the sealing plate 4 abuts against the back plate 1 and the light-transmitting plate 2, together with the back plate 1 and the light-transmitting plate 2, forming a relatively stable outer frame for the supplementary lighting module, which is not easily deformed. In the preferred embodiment, the main body of the back plate 1 and the light-transmitting plate 2 is rectangular, and the two sealing plates 4 form a right-angled triangle. In this structure, the back plate 1, the light-transmitting plate 2, and the sealing plate 4 form a right triangular prism frame, making the structure more stable. In other embodiments, it can also be any other shape adapted to the structure of the machine base 5.

[0033] In a preferred embodiment, the light-transmitting plate 2 has a viewing window 20 through which the upper surface of the lampshade 31 passes. A positioning stud 22 is provided on the inner surface of the light-transmitting plate 2. The lamp housing assembly 3 includes a lampshade 31 and a lamp housing 32 whose openings overlap. A through hole 30 is provided through the overlapping opening of the lampshade 31 and lamp housing 32. The supplementary lighting module also includes a fastening nut 23 that is threadedly engaged with the positioning stud 22. After the positioning stud 22 passes through the through hole 30, the fastening nut 23 is tightened onto the positioning stud 22, fixing the lamp housing assembly 3 onto the light-transmitting plate 2. In this structure, the lamp housing assembly 3 is positioned by the positioning stud 22 during installation, making installation relatively simple. Furthermore, tightening the fastening nut 23 during installation simultaneously closes the lamp housing assembly 3, and during disassembly, the lamp housing assembly 3 naturally opens, facilitating maintenance of the light source inside the lamp housing assembly 3.

[0034] A self-service photo-taking device includes a machine base 5 and a fill light module as described above, and also includes fasteners 53 that cooperate with the positioning posts 11. The machine base 5 has several positioning holes 51 corresponding to the positioning posts 11. After the positioning posts 11 are inserted into the positioning holes 51, the fasteners 53, from inside the machine base 5, cooperate with the positioning posts 11 to fix the fill light module onto the machine base 5. Because it includes the aforementioned fill light module, this self-service photo-taking device possesses all the beneficial technical effects brought by the fill light module, which will not be elaborated further here. Furthermore, the fasteners 53 are located inside the machine base 5, thus being concealed and aesthetically pleasing.

[0035] In a preferred embodiment, the machine base 5 includes a tabletop 52, with the positioning hole 51 positioned higher than the tabletop 52. After the positioning post 11 is inserted into the positioning hole 51, the supplementary light module is supported by the tabletop 52, and the back plate 1 is in contact with the surface of the machine base 5. In this structure, the supplementary light module is entirely supported by the tabletop 52, resulting in a relatively stable installation structure, allowing the supplementary light module to be made of heavier materials. The back plate 1 is in contact with the surface of the machine base 5, enhancing the overall integrity of the machine base 5's appearance, and generally preventing displacement or deformation after installation. Existing machine bases 5 typically include a display screen in front of the user and a printing outlet at the bottom of the machine base 5. There is a corner between the display screen and the bottom of the machine base 5; the supplementary light module can be placed at this corner, seamlessly integrated below the screen.

[0036] In a preferred embodiment, the supplementary lighting module further includes a hook 21 for users to temporarily hang their belongings. Most existing self-service photo booths are equipped with seats, allowing users to temporarily place their personal items. However, this results in the self-service photo booth being used as a rest area, affecting the device's profitability. To improve device utilization and avoid machine occupancy, some self-service photo booths have removed the seats, leaving users with nowhere to place their belongings and making use inconvenient. Adding the hook 21 improves the user experience. Attaching the hook 21 to the supplementary lighting module enhances the overall appearance and makes it easy to replace if damaged.

[0037] In a preferred embodiment, the hook 21 extends from the light-transmitting plate 2. The light-transmitting plate 2 extends along the table surface 52, extends forward beyond the table surface 52, then bends downward and hangs down, with a hook 21 extending from the left and right ends of the hanging portion to the opposite sides. In this structure, the hook 21 is integrally formed with the light-transmitting plate 2, making it relatively secure. It can also be manufactured by bending a single metal plate, simplifying the process. The section of the light-transmitting plate 2 extending along the table surface 52 makes the fixing structure of the supplementary lighting module more robust, allowing for load-bearing capacity. The section of the light-transmitting plate 2 extending forward beyond the table surface 52 separates the hook 21 portion from the machine base 5, allowing for the hanging of items of a certain size. The hooks 21 extending from the left and right ends of the light-transmitting plate 2 provide ample hanging space, and the short ends of individual hooks 21 provide adequate load-bearing capacity, meeting general needs.

[0038] In a preferred embodiment, the light-transmitting plate 2 further includes a fixing post 24, which is connected to the surface of the light-transmitting plate 2 that is in contact with the table surface 52. The machine base 5 is provided with a guide hole 54 for the fixing post 24 to pass through. In the preferred embodiment, the guide hole 54 is an oblong hole. During installation, the fixing post 24 is first passed through the guide hole 54 to pre-fix the light-transmitting plate 2 onto the machine base 5, and then the light-transmitting plate 2 is pushed forward to allow the positioning post 11 to pass through the positioning hole 51 for fixation. This structure facilitates installation and enhances the load-bearing capacity of the supplementary lighting module. In the preferred embodiment, the fixing post 24 is a threaded stud, which is also fitted with a nut for fastening. In other embodiments, it can also be a hole that matches the shape of the fixing post 24, using the elasticity of the light-transmitting plate 2 to allow the positioning post 11 to pass through the positioning hole 51.

[0039] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0040] In the description of this specification, the references to terms such as "preferred embodiment," "another embodiment," "other embodiment," or "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0041] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A supplementary lighting module, characterized in that: The light module includes a back plate (1) and a light-transmitting plate (2) arranged at an angle to the back plate (1). The light-transmitting plate (2) is connected to the upper end of the back plate (1) and separated from it at the lower end. The back plate (1) includes a plurality of positioning posts (11) arranged on its outer surface. The supplementary light module also includes a lamp housing assembly (3) detachably connected to the light-transmitting plate (2). The lamp housing assembly (3) includes a box-shaped receiving cavity and an opening that is in contact with the light-transmitting plate (2).

2. The supplementary lighting module according to claim 1, characterized in that: The left and right ends of the lamp housing assembly (3) are respectively detachably connected to a sealing plate (4).

3. A supplementary lighting module according to claim 2, characterized in that: The lamp housing assembly (3) includes a lamp housing stud (33), and the supplementary light module also includes a lamp housing nut (34) that is threadedly engaged with the stud. The sealing plate (4) is provided with a through hole corresponding to the lamp housing stud (33). The lamp housing stud (33) passes through the through hole and exits the sealing plate (4). The lamp housing nut (34) is screwed onto the lamp housing stud (33) to abut and fix the sealing plate (4) onto the lamp housing assembly (3).

4. A supplementary lighting module according to claim 2, characterized in that: The sealing plate (4) is triangular, with two sides abutting against the back plate (1) and the light-transmitting plate (2) respectively.

5. A supplementary lighting module according to any one of claims 1-4, characterized in that: The lamp housing assembly (3) includes a lampshade (31) and a lamp housing (32) with their openings overlapping. A through hole (30) is provided through the overlapping opening of the lampshade (31) and the lamp housing (32). A viewing window (20) is provided on the light-transmitting plate (2) for the upper surface of the lampshade (31) to pass through. A positioning stud (22) is provided on the inner surface of the light-transmitting plate (2). The supplementary lighting module also includes a fastening nut (23) that is threadedly engaged with the positioning stud (22). After the positioning stud (22) passes through the through hole (30), the fastening nut (23) is tightened on the positioning stud (22) to fix the lamp housing assembly (3) on the light-transmitting plate (2).

6. A self-service photo-taking device, characterized in that: The device includes a machine base (5) and a fill light module as described in any one of claims 1-5, and also includes a fastener (53) that cooperates with the positioning post (11). The machine base (5) is provided with a plurality of positioning holes (51) corresponding to the plurality of positioning posts (11). After the positioning post (11) is inserted into the positioning hole (51), the fastener (53) cooperates with the positioning post (11) from inside the machine base (5) to fix the fill light module on the machine base (5).

7. A self-service photo-taking device according to claim 6, characterized in that: The machine (5) includes a table (52), the positioning hole (51) is positioned higher than the table (52), after the positioning column (11) is inserted into the positioning hole (51), the supplementary light module is supported by the table (52), and the back plate (1) is in contact with the surface of the machine (5).

8. A self-service photo-taking device according to claim 7, characterized in that: The fill light module also includes hooks (21) for users to temporarily hang items.

9. A self-service photo-taking device according to claim 8, characterized in that: The hook (21) is an extension of the light-transmitting plate (2). The light-transmitting plate (2) extends along the table surface (52), extends beyond the table surface (52) and continues to extend forward for a while, then bends down and hangs down, and a hook (21) extends from the left and right ends of the hanging part to the opposite side.

10. A self-service photo-taking device according to claim 9, characterized in that: The light-transmitting plate (2) also includes a fixing post (24), which is connected to the surface of the light-transmitting plate (2) that is in contact with the table surface (52). The machine base (5) is provided with a guide hole (54) for the fixing post (24) to pass through.

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