Inspection lamp box

Abstract

The utility model provides an inspection lamp box which comprises a bottom plate, a lamplight plate, a light guide plate and a glass plate which are sequentially arranged in a stacked mode, and the surface of the side, away from the light guide plate, of the glass plate is used for containing products. The side, facing the light guide plate, of the lamplight plate is spirally provided with lamp strips around the center, a certain distance is arranged between every two adjacent circles of lamp strips, each circle of lamp strips is independently provided with a pressure-sensitive switch, and the pressure-sensitive switches are used for controlling the lamp strips of the corresponding circles to be turned on and turned off. According to the utility model, a traditional detection lamp box is modified, the gravity effect of a product and the particularity of a product structure are utilized, and the light source only in a product coverage area is selectively turned on through the matched control of the pressure-sensitive switch, so that the interference of the unneeded light source is reduced, and the whole detection device better meets the operation requirement during actual detection work; and the brightness requirement of a dark environment required during light detection is better met, the structure is simple, and the detection accuracy is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of micro-hole detection of gas distribution plates, and relates to an inspection light box. Background Technique

[0002] Semiconductor gas distribution plates are common core components in the CVD process of semiconductor chip manufacturing. The product mainly has a surface multi-step micro-hole structure. During use, the mixed process gas is passed through this component, so as to be uniformly introduced into the reaction chamber at a certain ratio and speed, and uniformly react and settle on the surface of the wafer below.

[0003] The gas distribution plate is an important part of the core process in integrated circuit production - chemical vapor deposition (CVD). Due to the significant advantages of the CVD process in terms of film formation uniformity, density, coverage, etc., it is widely used in the production process of advanced large-scale integrated circuits. The basic principle of CVD is to mix a variety of semiconductor gaseous raw materials evenly, and then uniformly introduce them into the reaction chamber at a constant speed through the gas distribution plate. Under the action of temperature, electric field and pressure, chemical reactions occur between them to form a new thin film material deposited on the surface of the wafer.

[0004] Therefore, the product quality of the gas distribution plate as an important intermediate medium component is particularly crucial. Its products are generally composed of a dense surface micro-hole structure. The middle micro-holes are used for gas circulation during use. However, due to the relatively complex product structure and the large number of micro-holes, it is extremely easy to have dirt blockage or foreign objects floating into them. Therefore, during the product production process, it is necessary to conduct light detection multiple times to confirm that the micro-holes of the product are unobstructed and free of debris. Otherwise, once it reaches the end customer for use, it will inevitably cause the product to be scrapped.

[0005] The prior art solution discloses a vacuum coating finished product inspection device, including a table frame body, a coating finished product and a transparent light box. The transparent light box is detachably located on the upper surface of the table frame body, and the coating finished product is detachably located on the upper surface of the transparent light box. The transparent light box includes a box body, an upper shell and a light strip inside the box body. The box body and the upper shell form a hollow structure, and the light strip is arranged around the inner wall of the hollow structure; the coating product is placed on the transparent light box, and the light source evenly emits from below the coating product to the coating product body, with a small reflectivity, so that the coating product body is covered by the light tube, and it will not cause the inspector's eyes to get tired after working continuously for a short time.

[0006] The prior art solution also discloses an Internet of Things intelligent light box, including a light box main body with an opening at the front end; a light strip is arranged inside the light box main body; a display layer covers the opening of the light box main body; a detection module is connected to the light box main body for detecting whether the position of the light box main body is deviated; a control module is connected to the light strip and the detection module for controlling the light strip; a communication module is connected to the control module for remote data communication.

[0007] However, in the current existing technology, there are still interferences from additional lighting and observation environment during micro-hole detection, and there is little involvement in the micro-hole detection of gas distribution plates. Therefore, there is an urgent need to design an inspection light box for the micro-hole defects of gas distribution plates to overcome the defects of the existing technology and meet the actual application requirements. Summary of the Invention

[0008] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide an inspection light box, especially a pressure-type inspection light box for gas distribution plates. In the present invention, a pressure-sensitive inspection light box is designed. By transforming the traditional detection light box, using the gravity of the product itself and the special structure of the product, through the cooperative control of pressure-sensitive switches, the light source in only the area covered by the product is selectively turned on, thereby reducing the interference of unnecessary light sources, making the entire detection device more in line with the operation requirements during actual detection work, and also better matching the required dim environment brightness during light detection. The structure is simple and the detection accuracy is high.

[0009] To achieve this purpose, the present invention adopts the following technical solutions:

[0010] The present invention provides an inspection light box, which includes a bottom plate, a light plate, a light guide plate, and a glass plate stacked in sequence. The surface of the glass plate away from the light guide plate is used to place the product; a light strip is spirally arranged around the center on the side of the light plate facing the light guide plate, and there is a certain distance between adjacent turns of the light strip, and a pressure-sensitive switch is independently arranged on each turn of the light strip, and the pressure-sensitive switch is used to control the turning off and on of the light strip in the corresponding turn.

[0011] In the present invention, a pressure-sensitive inspection light box is designed. By transforming the traditional detection light box, using the gravity of the product itself and the special structure of the product, through the cooperative control of pressure-sensitive switches, the light source in only the area covered by the product is selectively turned on, thereby reducing the interference of unnecessary light sources, making the entire detection device more in line with the operation requirements during actual detection work, and also better matching the required dim environment brightness during light detection. The structure is simple and the detection accuracy is high.

[0012] It should be noted that for the rapid detection of the blockage and unblockage of the micro-holes in the current gas distribution plate, generally, the detection method using light is adopted. The product is placed in front of a light source with a certain brightness or a background wall, and through manual visual inspection, the light passing through the micro-holes is observed to judge whether there is a blockage in the holes. If there is an abnormality in the corresponding micro-hole, the light spot at that place will be missing, dimmed or significantly deformed; however, when using a flashlight to shine light from the back side of the product and an operator observes from the other side, and the corresponding inspection area is selected by moving the flashlight, since the single detection range is small, but the product generally has a large area, this method requires high requirements for the operator, and the labor intensity is high during long-term operation, and the probability of repeated detection and missed detection is relatively high; in addition, the traditional standard light box produces a white screen white light effect through the cooperation of the light source and the reflective film, but in actual use, it cannot be matched according to the product structure, and there are still many useless light areas except the product coverage area, which instead generates additional light interference for the user. In addition, due to the existence of this part of the additional bright area, the brightness of the entire detection environment is relatively high, and the detection difficulty is large.

[0013] Therefore, the utility model remodels the light box during the blockage and unblockage detection of the product, adjusts the layout and control of the light belts therein, and controls the light-emitting area of the entire light board by adding some pressure-sensitive switches under the light guide plate, selectively only turning on the lights in the product coverage area and turning off the surrounding useless lights to avoid more interference. In addition, it is also convenient to place the blockage and unblockage detection environment in a darker environment, and the detection effect is more obvious.

[0014] It should be noted that the core part of the utility model is the middle light layer, which is mainly composed of light belts arranged in a spiral and annular distribution in cooperation with pressure-sensitive switches, independent of each other and with circuit connections. The opening and closing of the light belts are controlled by the pressure-sensitive switches on the corresponding circles. The pressure-sensitive switches remain normally closed when no product is placed, and the light source light belts of the corresponding circles are in the off state. When a heavy object is placed, due to the special structure of the product, the outermost circle position of the product will press the pressure-sensitive switches of the corresponding circles, and the switches at the corresponding positions will be converted to the open state, and all the lights of the corresponding circles and the inner circles will be turned on. Finally, only the lights in the area pressed by the product will be lit, and the lights in the positions where no product is placed will still remain in the normally closed state, and the light passes through the micro-holes on the product, and the inspector visually judges whether there is an abnormality in all the micro-holes on the entire product surface.

[0015] It should be noted that the pressure-sensitive switch in the utility model is an induction switch that can be opened and closed according to the mass of the object.

[0016] As a preferred technical solution of the utility model, the edges of the bottom plate, the light board, the light guide plate and the glass plate are hermetically connected through a frame.

[0017] As a preferred technical solution of the present utility model, the frame body is an aluminum frame body.

[0018] The present utility model selects an aluminum frame body because of its light weight, strong toughness and high versatility.

[0019] As a preferred technical solution of the present utility model, the bottom plate is a square bottom plate, and the bottom plate is an aluminum plate.

[0020] As a preferred technical solution of the present utility model, the length of the bottom plate is 700 - 750 mm. For example, it can be 700 mm, 705 mm, 710 mm, 715 mm, 720 mm, 725 mm, 730 mm, 735 mm, 740 mm, 745 mm, 750 mm, etc., but is not limited to the listed values, and other unlisted values within this numerical range are equally applicable.

[0021] As a preferred technical solution of the present utility model, the width of the bottom plate is 700 - 750 mm. For example, it can be 700 mm, 705 mm, 710 mm, 715 mm, 720 mm, 725 mm, 730 mm, 735 mm, 740 mm, 745 mm, 750 mm, etc., but is not limited to the listed values, and other unlisted values within this numerical range are equally applicable.

[0022] In the present utility model, the length of the bottom plate is 700 - 750 mm and the width is 700 - 750 mm because the actual product is used for in - hole detection of a semiconductor gas distribution plate. The general diameter of the product is < 600 mm, which can effectively carry the test piece; if it is too small, the product cannot be placed completely, and if it is too large, it will waste space and lighting energy consumption, etc.

[0023] As a preferred technical solution of the present utility model, the certain distance is 20 - 30 mm. For example, it can be 20 mm, 21 mm, 22 mm, 23 mm, 24 mm, 25 mm, 26 mm, 27 mm, 28 mm, 29 mm, 30 mm, etc., but is not limited to the listed values, and other unlisted values within this numerical range are equally applicable.

[0024] In the present utility model, the certain distance is 20 - 30 mm. This range is the average interval width of the spiral - shaped lamp belt distribution. If it is too small, it will lead to a greater amount of lamp belt usage, and the dense lamp beads will result in a stronger light brightness in this area, affecting the eyesight of the visual inspection operator, being easy to harm the human body. In addition, during actual use, there is more heat dissipation, which will affect the equipment life in the long - term. If the distance is too large, the light will be sparse. Since the gas distribution plate product itself has a dense microporous structure, if the light is not concentrated, it will affect the through - hole visual inspection effect, easily resulting in abnormal situations such as local darkness and local brightness, affecting the judgment.

[0025] As a preferred technical solution of the present utility model, when the light strip is spirally arranged, the maximum diameter is 300 - 600 mm. For example, it can be 300 mm, 350 mm, 400 mm, 450 mm, 500 mm, 550 mm, 600 mm, etc., but it is not limited to the listed values. Other unlisted values within this numerical range are equally applicable.

[0026] In the present utility model, when the light strip is spirally arranged, the maximum diameter is 300 - 600 mm because the light strip is designed flexibly. The maximum size of the product is generally within a diameter of 300 - 600 mm. It can be designed as a general model and arranged according to the maximum size, or it can be specifically designed and applied according to products of different sizes. If it is too large, it will cause waste and energy consumption. If it is too small, it is easy to have insufficient lighting and cannot cover the entire through-hole area of the product.

[0027] As a preferred technical solution of the present utility model, the pressure-sensitive switches on adjacent turns of the light strip are linearly arranged.

[0028] As a preferred technical solution of the present utility model, the thickness of the glass plate is 1 - 2 mm. For example, it can be 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, etc., but it is not limited to the listed values. Other unlisted values within this numerical range are equally applicable.

[0029] In the present utility model, the thickness of the glass plate is 1 - 2 mm. The glass plate is used to carry the product and protect the inside of the light box. If it is too thin, the strength is insufficient and it is easy to break. If it is too thick, it will affect the light transmission.

[0030] Preferably, the thickness of the light guide plate is 1 - 2 mm. For example, it can be 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, etc., but it is not limited to the listed values. Other unlisted values within this numerical range are equally applicable.

[0031] In the present utility model, the thickness of the light guide plate is 1 - 2 mm because the thickness of the light guide plate has a certain influence on the light transmission. The light guide plate determines the degree of uniform light emission, and the thickness of the light guide plate also affects the uniformity. An overly thin light guide plate may cause uneven distribution of brightness saturation color; when the thickness of the light guide plate is too large, problems such as shadows and light spots may occur.

[0032] It should be noted that in the present utility model, no special limitation is imposed on the specific material of the light guide plate, and those skilled in the art can make adaptive adjustments according to the actual situation. Among them, the material of the light guide plate can be selected from acrylic material or glass material.

[0033] It should be noted that the inspection light box of the utility model overcomes the problem of low labor intensity of personnel operation. The product is placed flat on the inspection light box and does not require personnel to assist in carrying or moving. Only one inspector is needed to ensure the smooth progress of the inspection and effectively avoid accidents such as bumps and scratches during the inspection process. Through the control technology of the pressure-sensitive switch and combined with the product structural characteristics, the light source of only the area covered by the product is selectively turned on, so that only this part of the light can be transmitted through the micropores of the product during the inspection process, reducing interference from other unnecessary light sources, making the entire inspection device more in line with the operational requirements of actual inspection work. The inspection conditions are more abundant and can be expanded to a dimly lit environment according to the inspection needs, making the inspection clearer and the judgment results more accurate.

[0034] Compared with the prior art, the beneficial effects of the utility model are:

[0035] In the utility model, a pressure-sensitive inspection light box is designed. By modifying the traditional inspection light box, the gravity of the product itself and the particularity of the product structure are utilized, and the light source of only the product coverage area is selectively turned on through the coordinated control of the pressure-sensitive switch, thereby reducing the interference of unnecessary light sources, making the entire inspection device more in line with the operational requirements of actual inspection work, and more in line with the brightness requirements of dark environments required for light detection. It has a simple structure and high detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A schematic diagram of the structure of a test light box provided for a specific embodiment of the utility model;

[0037] Figure 2 A schematic diagram of the arrangement of a light strip in an inspection light box provided in a specific embodiment of the utility model;

[0038] Figure 3 A circuit diagram of a light strip and a pressure-sensitive switch of an inspection light box provided in a specific embodiment of the utility model;

[0039] Among them, 1-bottom plate; 2-light panel; 3-light guide plate; 4-glass plate; 5-light strip; 6-pressure sensitive switch. DETAILED DESCRIPTION

[0040] It should be understood that in the description of the present utility model, the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, terms such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "plurality" is two or more.

[0041] It should be noted that in the description of the present utility model, unless otherwise clearly specified and limited, the terms "set", "connected", "connected to" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific situations.

[0042] The technical solution of the present utility model will be further described below with reference to the drawings and through specific embodiments.

[0043] In a specific embodiment, the present utility model provides an inspection light box, as Figure 1 and Figure 2 shown. The inspection light box includes a bottom plate 1, a light panel 2, a light guide plate 3, and a glass plate 4 that are sequentially stacked. The side surface of the glass plate 4 away from the light guide plate 3 is used to place products; on the side of the light panel 2 facing the light guide plate 3, a light belt 5 is spirally arranged around the center. There is a certain distance between adjacent turns of the light belt 5, and a pressure-sensitive switch 6 is independently arranged on each turn of the light belt 5. The pressure-sensitive switch 6 is used to control the turning off and lighting of the light belt 5 in the corresponding turn.

[0044] It should be noted that for the rapid detection of the blockage and unblockage of the micropores on the gas distribution plate at present, generally, the detection method using light is adopted. The product is placed in front of a light source or a background wall with a certain brightness, and through manual visual inspection, the light passing through the micropores is observed to judge whether there is a blockage in the pores. If there is an abnormality in the corresponding micropore, the light spot at that place will be missing, dimmed or significantly deformed; however, when using a flashlight to shine light from the back side of the product and an operator observes from the other side, and the flashlight is moved to select the corresponding inspection area, this method has a small single detection range, but the product generally has a large area. Therefore, this method has high requirements for operators, and the labor intensity is high during long-term operation, and the probability of repeated detection and missed detection is relatively high; in addition, the traditional standard light box produces the effect of a whole white screen white light through the cooperation of the light source and the reflection film, but in actual use, it cannot be matched according to the product structure, and there are still many useless light areas outside the product coverage area, which instead generates additional light interference to the users. In addition, due to the existence of this part of the additional bright area, the brightness of the entire detection environment is relatively high, and the detection difficulty is large.

[0045] Therefore, the utility model reforms the light box during the blockage and unblockage detection of the product, adjusts the arrangement and control of the light strip 5 therein, and controls the light-emitting area of the entire light board 2 by adding some pressure-sensitive switches 6 under the light guide plate 3, selectively only turning on the lights in the product coverage area and turning off the surrounding useless lights to avoid more interference. In addition, it is also convenient to place the blockage and unblockage detection environment in a lower and darker environment, and the detection effect is more obvious.

[0046] It should be noted that the core part of the utility model is the middle light layer, which is mainly composed of the light strip 5 arranged in a spiral and annular distribution in cooperation with the pressure-sensitive switch 6. They are independent of each other and there is an electrical connection. The opening and closing of the light strip 5 are controlled by the pressure-sensitive switch 6 on the corresponding layer. The pressure-sensitive switch 6 remains normally closed when no product is placed, and the light strip 5 of the light source in the corresponding layer is in the off state. When a heavy object is placed, due to the special structure of the product, the maximum outer circle position of the product will press the pressure-sensitive switch 6 in the corresponding layer, and the switch at the corresponding position will be converted to the open state, and all the lights in the corresponding layer and the inner circle will be turned on. Finally, only the lights in the area pressed by the product will be lit, and the lights in the position where no product is placed will still remain in the normally closed state, and the light passes through the micropores on the product, and the inspector visually judges whether there is an abnormality in all the micropores on the entire product surface.

[0047] Furthermore, the edges of the bottom plate 1, the light board 2, the light guide plate 3, and the glass plate 4 are hermetically connected through a frame.

[0048] Furthermore, the frame is an aluminum frame.

[0049] Furthermore, the bottom plate 1 is a square bottom plate 1, and the bottom plate 1 is an aluminum plate.

[0050] Furthermore, the length of the bottom plate 1 is 700 - 750 mm. For example, it can be 700 mm, 705 mm, 710 mm, 715 mm, 720 mm, 725 mm, 730 mm, 735 mm, 740 mm, 745 mm, 750 mm, etc., but is not limited to the listed values. Other unlisted values within this range are equally applicable.

[0051] Furthermore, the width of the bottom plate 1 is 700 - 750 mm. For example, it can be 700 mm, 705 mm, 710 mm, 715 mm, 720 mm, 725 mm, 730 mm, 735 mm, 740 mm, 745 mm, 750 mm, etc., but is not limited to the listed values. Other unlisted values within this range are equally applicable.

[0052] Furthermore, a certain distance is 20 - 30 mm. For example, it can be 20 mm, 21 mm, 22 mm, 23 mm, 24 mm, 25 mm, 26 mm, 27 mm, 28 mm, 29 mm, 30 mm, etc., but is not limited to the listed values. Other unlisted values within this range are equally applicable.

[0053] Furthermore, when the light strip 5 is spirally arranged, the maximum diameter is 300 - 600 mm. For example, it can be 300 mm, 350 mm, 400 mm, 450 mm, 500 mm, 550 mm, 600 mm, etc., but is not limited to the listed values. Other unlisted values within this range are equally applicable.

[0054] Furthermore, the pressure - sensitive switches 6 on each adjacent turn of the light strip 5 are linearly arranged.

[0055] Furthermore, the thickness of the glass plate 4 is 1 - 2 mm. For example, it can be 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, etc., but is not limited to the listed values. Other unlisted values within this range are equally applicable.

[0056] Furthermore, the thickness of the light guide plate 3 is 1 - 2 mm. For example, it can be 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, etc., but is not limited to the listed values. Other unlisted values within this range are equally applicable.

[0057] It should be noted that the present invention does not specifically limit the specific material of the light guide plate 3, and those skilled in the art can make adaptive adjustments according to actual conditions. Among them, the material of the light guide plate 3 can be acrylic or glass.

[0058] It should be noted that the inspection light box of the present invention overcomes the problem of low labor intensity of human operation. The product is placed flat on the inspection light box and does not require human assistance in carrying or moving. Only one inspector is needed to ensure the smooth progress of the inspection and effectively avoid accidents such as bumps and scratches during the inspection process. Through the control technology of the pressure-sensitive switch 6 and the product structural characteristics, the light source of only the area covered by the product is selectively turned on, so that only this part of the light can be transmitted through the micropores of the product during the inspection process, reducing interference from other unnecessary light sources, so that the entire inspection device is more in line with the operational requirements of actual inspection work. The inspection conditions are more abundant and can be expanded to a dimly lit environment according to the inspection needs, making the inspection clearer and the judgment results more accurate.

[0059] like Figure 3 As shown, after the circuit of the light strip 5 in the inspection light box is flattened, the control diagram after the pressure-sensitive switch 6 is added, that is, the light groups are counted from the outermost circle to the innermost circle, and each group of lights is connected to the power supply through a pressure-sensitive switch 6. When there is no product, after turning on the power, all the pressure-sensitive switches 6 remain normally open due to the lack of pressure applied by gravity, and all the light groups operate normally, then the entire light box will remain normally lit; when a product is placed at the position of, for example, light 6, the corresponding nearby pressure-sensitive switches 6 will change the on-off state due to the action of gravity and become closed, then all the light groups in lights 1 to 6 will be short-circuited, and the light box will show that all the lights close to the outside are extinguished, and the lights in the center of the product are kept normally lit. At this time, it can be used to observe the defects and blocking effects in the through holes of the product.

[0060] Example 1

[0061] The utility model provides an inspection light box, wherein:

[0062] The inspection light box includes a base plate 1, a light panel 2, a light guide plate 3 and a glass plate 4 which are stacked in sequence. The surface of the glass plate 4 away from the light guide plate 3 is used for placing products. The light panel 2 is provided with a light strip 5 which is spirally arranged around the center on one side facing the light guide plate 3. A certain distance is arranged between each adjacent circle of the light strip 5, and each circle of the light strip 5 is independently provided with a pressure-sensitive switch 6, which is used to control the closing and lighting of the light strip 5 in the circle.

[0063] The edge of the bottom plate 1, the edge of the light panel 2, the edge of the light guide plate 3 and the edge of the glass plate 4 are sealed and connected through a frame, and the frame is an aluminum frame; the bottom plate 1 is a square bottom plate 1, and the bottom plate 1 is an aluminum plate.

[0064] The length of the bottom plate 1 is 700 mm, the width of the bottom plate 1 is 700 mm, a certain distance is 30 mm, the maximum diameter when the light strip 5 is spirally arranged is 600 mm, the pressure-sensitive switches 6 on adjacent turns of the light strip 5 are linearly arranged, the thickness of the glass plate 4 is 1 mm, and the thickness of the light guide plate 3 is 1 mm.

[0065] In summary, the present utility model designs a pressure-sensitive inspection light box. By transforming the traditional detection light box, using the gravity of the product itself and the particularity of the product structure, through the cooperation control of the pressure-sensitive switch 6, the light source in only the area covered by the product is selectively turned on, thereby reducing the interference of unnecessary light sources, making the entire detection device more in line with the operation requirements during actual detection work, and also more matching the required dim ambient brightness during light detection. The structure is simple and the detection accuracy is high.

[0066] The above is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present utility model fall within the protection scope and the disclosure scope of the present utility model.

Claims

1. An inspection light box, characterized in that: The inspection light box comprises a bottom plate, a light plate, a light guide plate and a glass plate which are stacked in sequence, and a surface of the glass plate on one side away from the light guide plate is used for placing products; A light strip is spirally arranged around the center on one side of the light panel facing the light guide plate, a certain distance is set between each adjacent circle of the light strip, and a pressure-sensitive switch is independently arranged on each circle of the light strip, and the pressure-sensitive switch is used to control the closing and lighting of the light strip in the circle.

2. The inspection light box according to claim 1, characterized in that: The edge of the bottom plate, the edge of the lighting plate, the edge of the light guide plate and the edge of the glass plate are sealed and connected through a frame.

3. The inspection light box according to claim 2, characterized in that: The frame is an aluminum frame.

4. The inspection light box according to claim 1, characterized in that: The bottom plate is a square bottom plate, and the bottom plate is an aluminum plate.

5. The inspection light box according to claim 1, characterized in that: The length of the bottom plate is 700-750 mm.

6. The inspection light box according to claim 1, characterized in that: The width of the bottom plate is 700-750 mm.

7. The inspection light box according to claim 1, characterized in that: The certain distance is 20 to 30 mm.

8. The inspection light box according to claim 1, characterized in that: The maximum diameter of the light strip when spirally arranged is 300-600 mm.

9. The inspection light box according to claim 1, characterized in that: The pressure-sensitive switches on each adjacent circle of the light strip are arranged linearly.

10. The inspection light box according to claim 1, characterized in that: The thickness of the glass plate is 1 to 2 mm; The thickness of the light guide plate is 1-2 mm.

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