Automobile black film size inspection tool

Abstract

The utility model discloses an automobile black film dimension inspection tool, and relates to the technical field of automobile accessories. And the plurality of groups of limiting assemblies are arranged at the top of the detection plate, are arranged in a matrix manner and can fix the automobile black film. According to the automobile black film size inspection tool of the utility model, negative pressure is adopted as power for attaching the automobile film to the detection plate, so that the attaching tightness between the automobile film and the detection plate can be improved, and meanwhile, the automobile films with different sizes can be uniformly fixed; according to the automobile film size inspection tool, the communicating holes communicated between the limiting pins are blocked through the conducting pieces, one end of the automobile film can be sequentially fixed to the other end of the automobile film, and therefore the technical problems that when an existing automobile film size inspection tool is used, the automobile film fixing effect is poor, and operation is tedious are effectively solved, effective fixing of the automobile film is achieved, and the service life of the automobile film is prolonged. And meanwhile, wrinkles generated when the automobile black film is fixed can be eliminated.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile accessories, especially to a size inspection tool for automobile black film. BACKGROUND

[0002] Most modern cars are provided with black film on the upper end of four doors and B column position, which improves the appearance of the whole vehicle, is also called car paint protection film, and the product material is a kind of polyurethane film containing anti-UV polymer, which is resistant to yellowing, has super toughness, wear resistance, easy adhesion, scratch resistance, can isolate the car paint surface from air after being installed, prevents acid rain, oxidation and scratching, and protects the paint surface of the car for a long time.

[0003] At present, the Chinese patent with patent application number "CN202020169775.2" discloses a size detection tool for automobile heat insulation film, which comprises a main frame, a support foot fixedly installed at the bottom of the main frame, a waste box fixedly arranged at the left side of the main frame, a conveying belt fixedly arranged at the bottom of the main frame, a rotating motor fixedly arranged at the right side of the conveying belt, the rotating motor being fixed to the inside of the main frame at the bottom end, a support fixedly arranged at the left side of the top of the main frame, a screw rod movably arranged at the upper end of the support, a diaphragm fixedly arranged at the bottom end of the screw rod, a measuring area fixedly arranged at the right side of the top of the main frame, a sliding clamping groove fixedly arranged at the rear and right part of the measuring area, a sliding block movably arranged at the upper part of the sliding clamping groove, a rotating sleeve movably arranged at the outer ring of the middle part of the sliding block, and a movable rotating rod fixedly arranged at the side of the rotating sleeve. Although the size detection tool for automobile heat insulation film can detect the size of the car film, it seriously ignores an important problem, that is, the car film is soft and thin, so it is necessary to ensure that the car film does not wrinkle or bulge during size detection. In addition, due to the different shapes of vehicles, the shape of the car film will also be adjusted adaptively, and the traditional car film size detection tool can only detect the car film with regular shape, which has great limitations.

[0004] However, during the implementation of the above technical scheme, at least the following technical problems are found:

[0005] The fixing effect of the film is poor and the operation is complicated: when the existing film size inspection tool is used, the film is mainly placed on the workbench, and the black film is positioned on the workbench by extrusion fixation, and then the size of the film is determined by comparison and observation, but in this process, the fixing structure needs to be adjusted back and forth, and at the same time, this method can only detect the size of the regular film, such as rectangular, but because the shape and appearance of the vehicle are constantly improving, the shape of the film also changes, which leads to the fact that the traditional film size detection cannot be applied; in addition, there is a very important problem in the process of detecting the film, that is, the film material is soft and thin, so when detecting the size of the film, it is necessary to ensure that the film does not wrinkle or bulge, and the existing solution is only to manually straighten and flatten, which not only affects the detection efficiency, but also completely relies on manual judgment (secondly, the film itself has a certain flexibility), which often causes deviation in the process of film size detection, seriously affecting the stability and convenience of detection, therefore, we provide a kind of automobile black film size inspection tool. Content of the utility model

[0006] (I) technical problems solved

[0007] In view of the defects of the prior art, the utility model provides a kind of automobile black film size inspection tool, and solves the technical problems that the fixing effect of the film is poor and the operation is complicated when the existing film size inspection tool is used.

[0008] (II) technical scheme

[0009] In order to achieve the above purpose, the utility model is realized by the following technical scheme:

[0010] A kind of automobile black film size inspection tool, the inspection tool includes:

[0011] Detection plate, which is provided with size frame consistent with the frame shape of the automobile black film to be detected;

[0012] A plurality of groups of limiting components are arranged on the top of the detection plate and arranged in matrix, which can fix the automobile black film;

[0013] Wherein, the limiting component contains a limiting pin with a through hole in the center, and the limiting pin is embedded in the top of the detection plate and communicated with the air nozzle connector on the detection plate through the pipeline;

[0014] When the air nozzle connector is pumped, air is pumped into the air nozzle connector along the top of the limiting pin, negative pressure is generated, and the automobile black film is attached to the top of the limiting pin under the action of negative pressure.

[0015] Preferably, the limiting pin is installed in the embedded slot opened on the top of the detection plate, and a communication hole is opened between two adjacent embedded slots in the length direction of the detection plate, and the two adjacent embedded slots are communicated through the communication hole;

[0016] The embedded slot is provided with a conducting member, and the opening and closing of the communication hole are controlled by the conducting member. When the through hole on the top of the limiting pin is closed, the conducting member is opened under the driving of negative pressure.

[0017] Preferably, the conducting member includes a blocking ring connected to the inner wall of the communication hole, and the blocking ring is connected to a sealing plug at the end of the communication hole through a spring, and the sealing plug is located at the end of the blocking ring facing the exhaust of the communication hole;

[0018] When the through hole on the top of the limiting pin is closed, the embedded slot generates negative pressure under the action of the air nozzle joint, and the sealing plug moves in the direction of the embedded slot;

[0019] The spring between the sealing plug and the blocking ring is always in a stretched state, and can pull the sealing plug to the port of the communication hole when the sealing plug is not subjected to external force.

[0020] Preferably, a baffle is placed on the top of the detection plate, and the baffle is located on one side of the size frame and corresponds to the end of the size frame, so as to limit the automobile black film during inspection;

[0021] The baffle covers the limiting pin between the size frame and the air nozzle joint.

[0022] Preferably, a sleeve seat is installed on the inner wall of the embedded slot, and the sleeve seat is located above the communication hole. The limiting pin and the sleeve seat are connected through threads, and the height of the limiting pin extending out of the detection plate can be adjusted by rotating the limiting pin.

[0023] Preferably, an annular connecting edge is connected to the outer wall of the sleeve seat and close to the bottom position, and the sleeve seat is connected to the inner wall of the embedded slot through the connecting edge.

[0024] Preferably, the limiting pin includes a threaded screw rod, and a threaded stud is connected to the top of the screw rod. The outer wall of the stud is threadedly connected to the inner wall of the sleeve seat.

[0025] The bottom of the stud is connected to an outer cylinder, and the outer cylinder is sleeved outside the screw rod. When the stud is connected to the sleeve seat, the outer cylinder is located in the gap between the sleeve seat and the embedded slot.

[0026] Preferably, when the sleeve seat is attached to the bottom of the stud, the top of the limiting pin is flush with the top of the detection plate.

[0027] (Three) beneficial effects

[0028] 1. By using negative pressure as the driving force for bonding the car film to the inspection plate, the adhesion between the car film and the inspection plate can be improved, while also uniformly fixing car films of different sizes. Secondly, by using a guide to block the connecting holes between the limiting pins, the subsequent limiting pins can be opened when the front limiting pin of the car black film is blocked, thus fixing the car black film from one end to the other sequentially (rather than fixing it all at once). During adsorption and fixing, the car black film can be laid flat. Therefore, it effectively solves the technical problems of poor film fixing effect and cumbersome operation when using existing car film size inspection tools, thereby achieving effective fixing of the car black film and preventing wrinkles from forming during fixing, thereby improving the stability of the car black film fixing and the accuracy of subsequent size inspection.

[0029] 2. Because the limiting pin is connected to the sleeve seat inside the detection plate by a thread, the limiting pin can be rotated to extend out of the detection plate and form a "protrusion" structure. Since the limiting pin is evenly distributed on the detection plate, it can be adjusted to the corresponding shape according to the shape of the black film, which facilitates the subsequent size comparison of the automotive black film (i.e., by observing whether the automotive black film can be completely embedded in the shape formed by the limiting pin). At the same time, the position of the limiting pin can be freely adjusted as needed, so it is suitable for automotive black films of various shapes and specifications, thus improving its applicability. Attached Figure Description

[0030] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0031] Figure 1 This is an overall structural diagram of an embodiment of the present utility model;

[0032] Figure 2 This is a structural diagram showing the distribution of the size frame, baffle, and detection plate in an embodiment of this utility model;

[0033] Figure 3 This is a partial cross-sectional view of the detection plate in an embodiment of the present invention;

[0034] Figure 4 This is an exploded view of the limiting component in an embodiment of this utility model;

[0035] Figure 5 This is an exploded view of the limiting pin in an embodiment of this utility model;

[0036] Figure 6 This is one of the schematic diagrams of the automotive black film laying structure in the embodiments of this utility model;

[0037] Figure 7The utility model discloses a second automobile black film laying structure schematic diagram of embodiment of the utility model;

[0038] Figure 8 The utility model discloses a back structure diagram of detection board of embodiment of the utility model;

[0039] Figure 9 The utility model discloses a size detection flow chart of automobile black film of embodiment of the utility model;

[0040] Figure 10 It is the schematic diagram when the wrinkle generates.

[0041] Legend:

[0042] 1, detection board;

[0043] 2, limiting component;21, limiting pin;211, stud;212, screw;213, outer tube;22, sleeve seat;23, communication hole;24, through -going piece;241, sealing plug;242, baffle ring;

[0044] 3, size frame;

[0045] 4, air nozzle connector;

[0046] 5, baffle;

[0047] 6, automobile black film. DETAILED DESCRIPTION

[0048] The utility model discloses a kind of automobile black film size inspection tools, effectively solve the technical problems that vehicle film size inspection tool is not good at fixing effect and is operated complicated when using, when using existing vehicle film size inspection tool, since adopting negative pressure as the power that vehicle film is attached to detection board, it can improve the close degree between vehicle film and detection board while also being able to uniformly fixed to different size and size vehicle film, second, by using through -going piece, the communication hole between limiting pin is plugged, it can open subsequent limiting pin when automobile black film plugs limiting pin in front end, so as to be fixed from one end of automobile black film to another end (not integral simultaneously fixed), when adsorbing and fixing, automobile black film can be laid, to realize the effective fixation of automobile black film, also can prevent automobile black film from appearing wrinkle when fixing, thereby improve the stability of automobile black film fixation and the accuracy of subsequent size inspection;In addition, since adopting screw connects limiting pin and sleeve seat inside detection board, it can be stretched out detection board by rotating limiting pin, form " convex " structure, since limiting pin is evenly distributed on detection board, therefore, it can be adjusted to corresponding shape according to the shape of black film, so as to facilitate subsequent size comparison of automobile black film (i.e. by observing whether automobile black film can be completely embedded into the shape surrounded by limiting pin), also can freely adjust the position of limiting pin according to need, so as to be suitable for various different shapes and specifications of automobile black film, improve its applicability.

[0049] Embodiment: The technical scheme in the embodiment of the application effectively solves the technical problem of poor fixing effect and complicated operation of the existing car film size inspection tool in use, and the general idea is as follows:

[0050] In view of the problems in the prior art, the utility model provides a kind of car black film size inspection tool, and the inspection tool is mainly divided into two parts, one is the limiting pin 21 that can be telescoped up and down, and limiting pin 21 is mainly connected by threaded detection plate 1 (sleeve seat 22 in detection plate 1), limiting pin 21 can form "convex" when rotating limiting pin 21;Using this characteristic, several limiting pins 21 are evenly distributed on the detection plate 1, so that a specified size and shape "frame" can be formed as needed to facilitate size comparison with car black film 6;The second is the air extraction air path that can generate stable negative pressure, which is connected with the air extraction pump outside through air nozzle connector 4, and the air extraction pump extracts air into air nozzle connector 4, thereby forming stable negative pressure, and car black film 6 placed on detection plate 1 will be tightly attached to it under the action of negative pressure.

[0051] In addition, we also use the principle that the suction force inside the limiting pin 21 increases when it is blocked by the car black film 6, so that the car black film 6 can be fixed from one end to the other end in turn, just like the staff from one end to the other end to scrape, thereby avoiding the "wrinkle" caused by fixing the two sides of car black film 6 at the same time, as Figure 10 The specific structure is as follows:

[0052] Detection plate 1 can adopt rectangular plate structure, as Figure 1 It is evenly provided with several embedding grooves, and each embedding groove is provided with limiting pin 21.

[0053] The limiting component 2 includes limiting pin 21, and limiting pin 21 mainly adopts a cylindrical screw rod 212 and a screw column 211 connected to the screw rod 212, and in order to make limiting pin 21 move up and down, limiting pin 21 is connected with detection plate 1 by thread, so that limiting pin 21 can move up and down by rotating limiting pin 21. Therefore, when rotating limiting pin 21, limiting pin 21 can be extended out of detection plate 1 to form "convex", as Figure 1 Each "convex" is equivalent to a point, so that by adjusting the limiting pin 21 at different positions, a "frame" can be formed along the edge of the car black film 6 to be detected, so that when the size of car black film 6 is detected, whether the edge of car black film 6 corresponds to the "frame" can be observed, so that whether the size of car black film 6 meets the factory requirements can be known.

[0054] To prevent the threads on the screw 212 from directly contacting the automotive black film 6, a cylindrical outer sleeve 213 is installed at the bottom of the screw 212, and the outer sleeve 213 is fitted over the screw 212. Figure 5 As shown, when the stud 211 is connected to the sleeve seat 22, the outer cylinder 213 is located in the gap between the sleeve seat 22 and the embedded groove, as follows. Figure 3 As shown, when the limiting pin 21 extends, its outer cylinder 213 is located on the outermost side. Therefore, when it is limited by the car black film 6, the outer cylinder 213 of the limiting pin 21 is in direct contact with the car black film 6. The surface of the outer cylinder 213 is smooth and will not damage the edge of the car black film 6.

[0055] The next question is how to connect the screw 212 to the detection plate 1 so that the thread is inside the outer cylinder 213 and not on the outside. To achieve this, a sleeve-shaped sleeve seat 22 is installed on the inner wall of the embedding groove, and the sleeve seat 22 is located above the connecting hole 23 (to avoid affecting the subsequent movement of the sealing plug 241). Then, the limiting pin 21 is connected to the sleeve seat 22 by threads. In this way, the height of the limiting pin 21 extending out of the detection plate 1 can be adjusted by rotating the limiting pin 21, and the "thread" can also be stored inside the outer cylinder 213. In order to leave a certain space in the outer cylinder 213, a ring-shaped connecting edge is connected to the outer wall of the sleeve seat 22 near the bottom, and then connected to the inner wall of the embedding groove through the connecting edge. In this way, a certain gap is reserved between the sleeve seat 22 and the embedding groove to facilitate the storage of the outer cylinder 213. Furthermore, when the limiting pin 21 is fully screwed in, the top of the limiting pin 21 is flush with the top of the detection plate 1, thereby preventing the limiting pin 21 from affecting the car black film 6.

[0056] In contrast to the above is the "air extraction path", which includes a connecting hole 23 between two adjacent embedded slots. These two adjacent embedded slots refer to two adjacent slots along the length of the detection plate 1. The two adjacent embedded slots can be connected through the connecting hole 23, so that air can enter from one embedded slot to another along the connecting hole 23. The reason for connecting two adjacent slots along the length of the detection plate 1 is to connect all embedded slots along the same length direction, which facilitates subsequent adjustment. Simply connect the air nozzle connector 4 to the embedded slot at the end (through a pipe) to extract air from the embedded slots in the same "row". When extracting air from the air nozzle connector 4, air is drawn into the air nozzle connector 4 along the top of the limiting pin 21, thereby creating a negative pressure state. Under the action of negative pressure, the automotive black film 6 is in contact with the top of the limiting pin 21.

[0057] By generating negative pressure (inward air intake) through the embedded groove, when the car black film 6 is placed on the detection plate 1, the car black film 6 will adhere to the detection plate 1 under the action of negative pressure, thereby completing the fixation of the car black film 6.

[0058] But in use found a problem, that is, due to all embedded groove at the same time "suction" operation, although can be fixed on the car black film 6, but ignore the car black film 6 in the placement, the wrinkles on it. Because all embedded groove at the same time "suction", therefore in the car black film 6 with wrinkles placed on the detection board 1, the car black film 6 on both sides of the wrinkle under the action of "suction", can't move, resulting in wrinkles can't eliminate, only rely on artificial. And because the car black film 6 has been "sucked", so the need to adjust the device to be closed or pull the both ends of the car black film 6, otherwise can't "scrape flat".

[0059] In order to solve the above problems, we use the way of fixed step by step, so that can be fixed after the front end, will open the embedded groove to car black film 6 for adsorption, so as to form the effect of "scrape flat". The specific structure is as follows:

[0060] The through piece 24 is arranged in the embedded groove, and the through piece 24 controls the opening and closing of the communication hole 23, so that all the embedded grooves behind the communication hole 23 can be closed. When the limiting pin 21 at the front position is closed, the through piece 24 will be opened under the action of the negative pressure in the current embedded groove, so as to transfer the negative pressure to the next embedded groove, thereby forming the effect of adsorbing in turn.

[0061] The through piece 24 includes a blocking ring 242 connected to the inner wall of the communication hole 23 and a sealing plug 241 connected to the blocking ring 242 through a spring. The sealing plug 241 is located at one end of the blocking ring 242 facing the exhaust of the communication hole 23 (i.e. the side connected to the air nozzle connector 4), and the sealing plug 241 is located at the end of the communication hole 23. In order to keep the sealing plug 241 stable contraction, the spring between the sealing plug 241 and the blocking ring 242 is always in tension. In this way, the sealing plug 241 can be pulled towards the port of the communication hole 23 when it is not subjected to external force, thereby closing the communication hole 23 between the two adjacent embedded grooves and completing the relative closure between the two adjacent embedded grooves.

[0062] On the contrary, when the through hole at the top of the limiting pin 21 is closed, air cannot be exhausted, and the negative pressure generated by the air pump acts on the current embedded groove. Since the through hole at the top of the limiting pin 21 is blocked and cannot suck air, the current embedded groove generates a large negative pressure under the action of the air nozzle connector 4. At this time, the sealing plug 241 sealing the communication hole 23 moves in the direction of the current embedded groove under the action of the negative pressure, thereby opening the communication hole 23 between the current embedded groove and the next embedded groove. At this time, air will flow from the next embedded groove into the current embedded groove and finally be exhausted by the air nozzle connector 4.

[0063] The above method, as shown in Figure 6 The automobile black film 6 is adsorbed and blocked on the left limiting pin 21 under the action of negative pressure, at this time the next position of the embedded slot is "opened", the air enters from the next position of the embedded slot, thereby generating negative pressure, attracting the automobile black film 6 to move to the position of the detection plate 1, and so on, so that the automobile black film 6 can be gradually adsorbed and fixed.

[0064] Since the limiting pin 21 in the front is not blocked, the rear will not be opened, so when detecting, a baffle 5 needs to be placed on the top of the detection plate 1, as shown in Figure 9 (a), and the baffle 5 is located on one side of the size frame 3 and corresponds to the shape of the end of the size frame 3, so that the automobile black film 6 can be limited during detection, and the limiting pin 21 between the size frame 3 and the air nozzle connector 4 is covered, so that the embedded slot generating negative pressure starts from the end position of the size frame 3.

[0065] In the specific implementation process, first, according to the shape of the automobile black film 6 to be detected, the size frame 3 consistent with the edge shape of the automobile black film 6 is adhered to the top of the detection plate 1, and then the baffle 5 is placed on the detection plate 1 and aligned with the end of the size frame 3. At the same time, the limiting pin 21 on the detection plate 1 is rotated along the edge of the size frame 3, and since the limiting pin 21 is connected to the sleeve seat 22 on the detection plate 1 through threads, during the rotation, the limiting pin 21 can be extended out of the detection plate 1 to form a "projection", as shown in the enlarged view in Figure 1 Each "projection" corresponds to a point, so that by adjusting the limiting pins 21 at different positions, a "frame" along the edge of the automobile black film 6 to be detected can be formed, so that during the size detection of the automobile black film 6, by observing whether the edge of the automobile black film 6 corresponds to the "frame", it can be known whether the size of the automobile black film 6 meets the factory requirements.

[0066] After the above is completed, the size of the automobile black film 6 can be detected, and the specific steps are as follows:

[0067] Firstly, the automobile black film 6 to be detected is placed on the detection plate 1, and the reference edge of the automobile black film 6 corresponds to the "projection" on the detection plate 1, as shown in Figure 9 (b) to (c), and then the automobile black film 6 is moved to the position of the baffle 5 and corresponds to the shape of the edge of the baffle 5.

[0068] Secondly, the external air pump is started to separate the air in the embedded slot, and the automobile black film 6 is adsorbed and blocked on the left limiting pin 21 under the action of negative pressure, as shown in Figure 6As shown, when the through hole at the top of the limiting pin 21 is closed, air cannot be exhausted, and the negative pressure generated by the air pump acts on the current embedding slot. Since the through hole at the top of the limiting pin 21 cannot suck in air, the current embedding slot generates a larger negative pressure under the action of the air exhaust of the air nozzle connector 4. At this time, the sealing plug 241 sealed on the communication hole 23 moves in the direction of the current embedding slot under the action of the negative pressure, thereby opening the communication hole 23 between the current embedding slot and the next embedding slot. At this time, air will flow from the next embedding slot into the current embedding slot and be finally exhausted by the air nozzle connector 4. With the “opening” of the next embedding slot, air enters from the next embedding slot, thereby generating a negative pressure, as shown. Figure 7 As shown, the automobile black film 6 is attracted to move to the position of the detection plate 1, and so on. In this way, the automobile black film 6 can be gradually adsorbed and fixed. Since the automobile black film 6 is gradually fixed from one end to the other end, the fixing mode is like manual “smoothing”, so that the automobile black film 6 will not be wrinkled.

[0069] In the third step, when the automobile black film 6 is adsorbed on the detection plate 1, the overlapping condition between the edge of the automobile black film 6 and the size frame 3 can be observed. According to the overlapping condition, whether the size of the automobile black film 6 deviates can be known.

[0070] Finally, it should be noted that: obviously, the above examples are only examples for clearly illustrating the utility model, and are not limited to the implementation mode. For ordinary skilled persons in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and impossible to enumerate all the implementation modes. The obvious changes or variations derived therefrom are still within the protection scope of the utility model.

Claims

1. An automotive black film dimensional inspection tool, characterized by, The testing tool includes: The detection plate (1) has a size frame (3) that is consistent with the shape of the frame of the black film (6) of the car to be tested; Several sets of limiting components (2) are set on the top of the detection plate (1) and arranged in a matrix to fix the car black film (6); The limiting component (2) includes a limiting pin (21) with a through hole at the center, and the limiting pin (21) is embedded in the top of the detection plate (1) and connected to the air nozzle connector (4) on the detection plate (1) through a pipe. When air is drawn from the valve connector (4), air is drawn into the valve connector (4) from the top of the limiting pin (21), creating a negative pressure at the top of the limiting pin (21), and the car black film (6) adheres to the top of the limiting pin (21) under the action of the negative pressure.

2. A black film dimensional inspection tool for an automobile as set forth in claim 1, characterized in that: The limiting pin (21) is installed in the embedding groove at the top of the detection plate (1), and a connecting hole (23) is opened between two adjacent embedding grooves in the length direction of the detection plate (1) to connect the two adjacent embedding grooves. The embedded groove is equipped with a guide (24), and the opening and closing of the connecting hole (23) is controlled by the guide (24). When the through hole at the top of the limiting pin (21) is closed, the guide (24) can be opened under the action of negative pressure.

3. An automotive black film dimensional inspection tool as claimed in claim 2, wherein: The conductive element (24) includes a retaining ring (242) connected to the inner wall of the connecting hole (23), and the retaining ring (242) is connected to a sealing plug (241) at the end of the connecting hole (23) by a spring, the sealing plug (241) being located at the end of the retaining ring (242) facing the exhaust port of the connecting hole (23); When the through hole at the top of the limiting pin (21) is closed, the embedded groove generates negative pressure under the action of the air nozzle connector (4) to draw air, which attracts the sealing plug (241) to move in the direction of the embedded groove. The spring between the sealing plug (241) and the retaining ring (242) is always in a stretched state, which can pull the sealing plug (241) toward the port of the connecting hole (23) when the sealing plug (241) is not subjected to external force.

4. A black film dimensional inspection tool for an automobile as defined in claim 3, wherein: A baffle (5) is placed on the top of the detection plate (1), and the baffle (5) is located on one side of the size frame (3) and corresponds to the shape of the end of the size frame (3), which can limit the movement of the car black film (6) during inspection; The baffle (5) covers the limiting pin (21) between the size frame (3) and the air nozzle connector (4).

5. An automotive black film dimensional inspection tool as defined in claim 2, wherein: A sleeve seat (22) is installed on the inner wall of the embedding groove, and the sleeve seat (22) is located above the connecting hole (23). The limiting pin (21) is connected to the sleeve seat (22) by a thread, and the height of the limiting pin (21) extending out of the detection plate (1) can be adjusted by rotating the limiting pin (21).

6. An automotive black film dimensional inspection tool as defined in claim 5, wherein: The outer wall of the sleeve seat (22) is connected to a ring-shaped connecting edge near the bottom, and the sleeve seat (22) is connected to the inner wall of the embedding groove through the connecting edge.

7. An automotive black film dimensional inspection tool as defined in claim 6, wherein: The limiting pin (21) includes a threaded screw (212), and a stud (211) is connected to the top of the screw (212). The outer wall of the stud (211) is threadedly connected to the inner wall of the sleeve seat (22). The bottom of the stud (211) is connected with an outer cylinder (213), and the outer cylinder (213) is sleeved outside the screw rod (212), when the stud (211) is connected with the sleeve seat (22), the outer cylinder (213) is located in the gap between the sleeve seat (22) and the embedded groove.

8. An automotive black film dimensional inspection tool as defined in claim 7, wherein: When the sleeve seat (22) and the bottom of the stud (211) are attached, the top of the limiting pin (21) is flush with the top of the detection plate (1).

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