Dental material thickness tester

Abstract

The present invention relates to the field of dental material technology, and specifically to a dental material thickness tester comprising a positioning mechanism, a side locking portion, and a lower locking portion. In the present invention, a glass sheet is manually assembled onto a corresponding placement table, the placement table is moved to the rear side of a placement guide rail via a conveyor assembly, and the placement table is accurately moved to a set operating position by a positioning mechanism, thereby reducing interference with the testing process caused by manual labor, improving overall testing efficiency, and facilitating adaptation to repeated testing needs. Furthermore, through the positioning guidance of the side locking portion, the lower locking portion, and the placement guide rail in the positioning mechanism, the placement table, once moved to the set operating position, is subjected to multiple positioning and locking operations from top to bottom, thereby improving the accuracy of the placement table after movement and reducing errors during the testing process.

Description

Technical Field

[0001] The invention relates to the technical field of dental materials, in particular to a dental material thickness tester. Background Art

[0002] Dental adhesives are a type of dental material, which are mainly used to fix restorations (such as crowns, bridges, inlays, etc.) to prepared teeth to ensure a tight and lasting connection between the restorations and the teeth. Common dental adhesives include glass ionomer cement, composite resin adhesives, zinc phosphate cement and resin-reinforced glass ionomer.

[0003] For dental cement materials, although the specific thickness requirement is not as emphasized as the restoration itself, the uniformity and appropriate thickness of the applied layer are still one of the key factors to ensure long-term success, so thickness testing of dental cement materials is necessary.

[0004] Currently, when conducting a thickness test, a vertical force is first applied to two glass plates using an existing working cylinder. The distance between the two glass plates is then measured using a numerical display to obtain a first value. The dental adhesive material to be tested is then applied between the two glass plates. The working cylinder repeatedly presses downward for a set time to ensure that the test material completely fills the space between the two glass plates. Another value is then obtained using the numerical display. The difference between the two values is the measured thickness.

[0005] In the current thickness testing process, two glass plates need to be manually stacked on a placement platform, and the glass plates need to be placed between the corresponding four positioning pins on the placement platform. Secondly, after completing the distance measurement between the two glass plates, the glass plates need to be manually removed and smeared with the material to be tested, and then repeated loading and testing are performed. The entire process is manually operated, and in order to avoid performance differences in adhesive materials within the same batch and improve data accuracy, the test of dental materials needs to be repeated many times, that is, batch multiple tests are required. However, currently, the loading and placement of glass plates and the removal of glass plates are all performed manually, so the current testing process is inefficient and not conducive to repeated testing.

[0006] Secondly, in the process of replacing or moving the glass sheet, the position of the placement platform and the position of the glass sheet are affected, thereby indirectly affecting the subsequent vertical downward pressure thickness test results and increasing the error of the overall test value. Summary of the Invention

[0007] Based on this, it is necessary to provide a dental material thickness tester to solve the above-mentioned problems of the prior art.

[0008] The present application provides a dental material thickness tester, comprising: a test platform, wherein a frame is provided on the test platform, a pressure head is provided on the frame, a digital display indicator for displaying the test results is provided on the frame, and a placement table for placing a glass plate is provided below the pressure head.

[0009] A placement guide rail is fixedly provided on the test platform, and a positioning mechanism for positioning the placement platform is provided on the placement guide rail.

[0010] A conveying unit for conveying the placement table to the rear of the placement guide rail is provided at the rear side of the test platform.

[0011] The positioning mechanism includes a guide groove, a guide groove is opened on the placement guide rail, the placement table slides in the guide groove, a clamping plate is provided in the guide groove for sliding back and forth, the clamping plate is driven by an electric guide rod to move back and forth, and a locking block is fixedly provided on the front end surface of the clamping plate, the clamping plate drives the locking block to push the placement table, and the locking block and the inner wall of the guide groove lock the placement table back and forth.

[0012] The abutting plate is provided with a side locking portion, which includes two fitting plates distributed on the left and right. The locking block and the placement guide rail are jointly provided with a lower locking portion for locking the plug-in cylinder, and the lower locking portion includes a plurality of abutting arc blocks for abutting the placement table.

[0013] The guide groove guides the placement platform to move forward, and the side locking part and the lower locking part perform multiple positioning and tightening on the placement platform.

[0014] According to a favorable embodiment, the rear opening of the guide groove is chamfered, and guide grooves are provided on the upper and lower inner walls of the longitudinal section of the guide groove. Four guide columns arranged in a matrix are fixed on the upper and lower end surfaces of the lower disc of the placement table.

[0015] According to a favorable embodiment, the guide groove is composed of a guide section and a limit section from back to front. The horizontal cross section of the guide section is an isosceles trapezoid with the smaller end facing the front. The width of the limit section of the guide groove is the same as the diameter of the guide column.

[0016] According to a favorable embodiment, the opening of the locking block faces the front side, the front end face of the upper horizontal section of the locking block is an arc-shaped surface that fits the circumferential surface of the upper disk on the placement table, and the front end face of the vertical section of the locking block is an arc-shaped surface that fits the circumferential surface of the lower disk section.

[0017] According to a favorable embodiment, two guide blocks distributed left and right are fixedly provided on the upper and lower end surfaces of the clamping plate. During the sliding process of the guide blocks in the guide sections of the corresponding guide grooves, the movement process of the guiding clamping plate and the locking block and the cooperation between the limiting sections in the guide grooves and the guide blocks are used to limit the positions of the clamping plate and the locking block.

[0018] According to a favorable embodiment, the lower locking portion also includes a U-shaped frame, and the opposite surfaces of the lower horizontal sections where the guide rail and the locking block are placed are fixedly provided with U-shaped frames, the two U-shaped frames are opposite to each other front and back, and a plurality of tightening arc blocks are respectively fixed at the middle position of the transverse section of the U-shaped frame and on the two longitudinal sections, and the tightening arc blocks are all facing the corresponding plug-in tubes, and the tightening arc blocks on adjacent longitudinal sections on different U-shaped frames are closed to wrap the plug-in tubes on the left and right sides.

[0019] According to a favorable embodiment, docking blocks are fixedly provided on both the left and right sides of the U-shaped frame, and a docking rod with an axis extending from front to rear is fixedly provided on the rear end face of the front docking block. After the locking block is pressed against the placement disc, the docking rod passes through the corresponding rear docking block.

[0020] According to a favorable embodiment, the side locking portion also includes a mounting rod, and the left and right sides of the clamping plate slide forward and backward and penetrate the mounting rod with an axis extending from front to rear, and the bonding plate is fixedly arranged on the front end surface of the corresponding mounting rod, and a spring sleeved on the mounting rod is fixedly arranged between the clamping plate and the bonding plate, and the front end surface of the clamping plate is fixedly provided with a clamping block for rigidly clamping the bonding plate after contact, and the front end surface of the bonding plate is an arc-shaped surface tightly attached to the circumferential surface of the lower side disc of the placement table, and the upper and lower inner walls of the front side of the guide groove are fixedly provided with gaskets.

[0021] According to an advantageous embodiment, ribs are fixedly provided on both upper and lower end surfaces of the laminating plate, and laminating blocks for pressing against adjacent guide pillars are fixedly provided on the front end surfaces of the ribs.

[0022] According to a favorable embodiment, the side locking portion also includes a positioning rod, and a positioning rod with an axis extending from front to back is fixedly provided on the front end surface of the bonding plate. The lower side disc and the placement guide rail of the placement table are both provided with positioning grooves corresponding to the corresponding positioning rods. When the locking block is pressed against the placement table, the positioning rod passes through the corresponding positioning groove.

[0023] In summary, the present invention includes at least one of the following beneficial effects: 1. In the present invention, the glass sheets are assembled manually onto the corresponding placement tables, the placement tables are moved to the rear side of the placement guide rails by the conveying assembly, and the placement tables are accurately moved to the set working positions by the positioning mechanism, thereby reducing the interference of manual operations on the testing process, improving the overall testing efficiency, and facilitating adaptation to the needs of repeated testing. In addition, through the positioning guidance of the side locking part, the lower locking part and the placement guide rails in the positioning mechanism, the placement table moved to the set working position is multi-positioned and locked from top to bottom, thereby improving the accuracy of the placement table after movement and reducing errors during the testing process.

[0024] 2. In the present invention, the cooperation between the guide groove and the guide column allows the placement table to be limited and guided to a set state, that is, the position of the glass plate is adjusted to a set state, and the left and right directions of the placement table are limited. Secondly, the guiding process of the guide groove enables the arc surface of the vertical section of the locking block to accurately fit and dock with the set area on the lower side disk of the placement table, ensuring the accuracy after subsequent locking, avoiding the problem of affecting the position accuracy of the placement table due to the position deviation of the locking block after movement, thereby indirectly leading to an increase in the overall test error.

[0025] 3. In the present invention, in the process of the clamping plate pushing the placement table forward, the placement table is guided and moved and the placement table is gradually limited. When the placement table moves to the set position on the front side, the locking block and the clamping arc block position and lock the placement table in the front and rear directions. The U-shaped area of the locking block and the two gaskets form a positioning lock for the placement table in the up and down directions. The circumferential positioning lock of the placement table is formed between the bonding plate and the placement guide rail. The multiple positioning locks from top to bottom improve the accuracy and stability of the placement table after placement. At the same time, all required actions can be achieved only by moving the clamping plate back and forth, which is convenient for operation and facilitates batch testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0027] Figure 1 A structural schematic diagram of a dental material thickness tester provided according to an embodiment of the present invention is shown.

[0028] Figure 2 A partial structural diagram of a dental material thickness tester provided according to an embodiment of the present invention is shown.

[0029] Figure 3 A schematic diagram of the three-dimensional structure among a test platform, a supporting bracket and a placement guide rail provided according to an embodiment of the present invention is shown.

[0030] Figure 4 A schematic diagram of a partial cross-sectional structure between a placement guide rail, a placement platform and a guide groove provided according to an embodiment of the present invention is shown.

[0031] Figure 5 A schematic diagram of a partial cross-sectional structure between a placement guide rail, a clamping plate and a locking block provided according to an embodiment of the present invention is shown.

[0032] Figure 6A rear view of abutting plates, placement guide rails and docking rods provided according to an embodiment of the present invention is shown.

[0033] Figure 7 A schematic diagram of a partial cross-sectional structure among a locking block, a laminating plate and a laminating block provided according to an embodiment of the present invention is shown.

[0034] Figure 8 A partial cross-sectional structural schematic diagram of a placement table provided according to an embodiment of the present invention is shown.

[0035] The above drawings include the following reference numerals: 1. test platform; 10. rack; 11. pressure head; 12. digital display indicator; 13. placement table; 130. plug-in cylinder; 131. positioning pin; 132. glass plate; 2. placement guide rail; 3. positioning mechanism; 30. conveying unit; 300. conveying assembly; 301. support frame; 302. avoidance groove; 31. guide groove; 310. pressing plate; 311. locking block; 312. guide Groove; 313, guide section; 314, limit section; 315, guide column; 316, guide block; 32, side locking part; 320, fitting plate; 321, mounting rod; 322, spring; 323, tightening block; 324, gasket; 325, rib; 326, fitting block; 327, positioning rod; 328, positioning groove; 33, lower locking part; 330, tightening arc block; 331, U-shaped frame; 332, docking block; 333, docking rod. DETAILED DESCRIPTION

[0036] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0037] like Figure 1 、 Figure 2 and Figure 8 As shown, a dental material thickness tester includes: a testing platform 1, a frame 10 is provided on the testing platform 1, an indenter 11 for testing is provided on the frame 10, the indenter 11 is driven up and down by an electric push rod, a digital display indicator 12 for displaying the test results is provided on the frame 10, a measuring rod in the digital display indicator 12 is connected to the indenter 11, and a placement table 13 for placing a glass plate 132 is provided below the indenter 11.

[0038] like Figure 1 and Figure 8As shown, a U-shaped placement guide rail 2 is fixedly provided on the upper end face of the test platform 1, and the U-shaped opening of the placement guide rail 2 faces the rear side. A positioning mechanism 3 for positioning the placement table 13 is provided on the placement guide rail 2; the placement table 13 is composed of two upper and lower discs, and the diameter of the upper disc is smaller than the diameter of the lower disc. Four circumferentially distributed plug-in tubes 130 are installed through the placement table 13, and positioning pins 131 for positioning the glass sheet 132 are installed in the plug-in tubes 130. The two glass sheets 132 are placed between the four positioning pins 131 in a stacked manner.

[0039] like Figure 1 and Figure 4 As shown, the positioning mechanism 3 includes a guide groove 31, a U-shaped guide groove 31 is opened on the placement guide rail 2, the large disc of the placement table 13 is slidably set in the guide groove 31, and a clamping plate 310 is set to slide back and forth in the guide groove 31. The clamping plate 310 is driven by an electric guide rod to move back and forth. The clamping plate 310 is fixedly set on the telescopic end of the electric guide rod, and the electric guide rod is fixedly set on the test platform 1 (not shown here).

[0040] like Figure 1 and Figure 3 As shown, a conveying unit 30 for conveying the placement table 13 to the rear of the placement guide rail 2 is provided on the rear side of the test platform 1; the conveying unit 30 includes a conveying component 300 and four supporting brackets 301 for supporting the placement table 13, the conveying component 300 includes an existing conveyor belt and a driving motor for driving the conveyor belt to transport the placement table 13, the four supporting brackets 301 are divided into two groups on the left and right, the two supporting brackets 301 in each group are distributed front and back and are fixedly set on the test platform 1, and the two groups of supporting brackets 301 are respectively located on the left and right sides of the guide groove 31, and the supporting brackets 301 are provided with an avoidance groove 302.

[0041] like Figure 4 and Figure 5 As shown, a U-shaped locking block 311 is fixedly provided on the front end surface of the clamping plate 310. The clamping plate 310 drives the locking block 311 to push the placement table 13. The locking block 311 and the inner wall of the guide groove 31 cooperate with each other to lock the placement table 13 front and back.

[0042] like Figure 3 、 Figure 4 and Figure 5 As shown, the left and right sides of the front end surface of the pressing plate 310 are commonly provided with side locking parts 32 , and the side locking parts 32 include two left and right distributions and both provided on the pressing plate 310 .

[0043] like Figure 5 and Figure 7As shown, the locking block 311 and the placement guide rail 2 are jointly provided with a lower locking portion 33 located below the placement platform 13 and used to lock the plug-in tube 130. The lower locking portion 33 includes a plurality of tightening arc blocks 330. The tightening plate 310 moves so that the tightening arc blocks 330 press against the plug-in tube 130 and lock the plug-in tube 130.

[0044] It should be noted that, in order to reduce the external interference to the placement table 13 during the detection process and the transportation process, a shell for protecting the transportation process and the testing process is fixedly provided on the test platform 1. Figure 1 The conveying component 300 adopts existing technology, and existing technologies with the same conveying function can be replaced.

[0045] First, the placement table 13 and the glass sheet 132 for batch testing are assembled manually (the two glass sheets 132 are assembled in a stacked manner), and then the placement table 13 is placed on the conveyor belt in the conveying assembly 300, and the driving motor is operated at the same time, so that the placement table 13 is transported from left to right. When the placement table 13 moves to the rear of the placement guide rail 2, the driving motor stops working, and the electric guide rod is operated to move the pressing plate 310 from back to front. During the movement, the pressing plate 310 pushes the placement table 13, and the placement table 13 moves to the bottom of the pressure head 11. During the process, the guide groove 31 cooperates with the placement table 13 to guide the movement of the placement table 13, and at the same time, the position of the clamping plate 310 is limited and guided to ensure that the set end face of the locking block 311 can be pressed against the placement table 13 in the future. Finally, the clamping plate 310 drives the locking block 311 to press the placement table 13 into the guide groove 31. At this time, the side locking part 32 locks the left and right sides of the placement table 13, and the lower locking part 33 positions and locks the four plug-in tubes 130. In summary, it is ensured that the placement table 13 moves to the bottom of the pressure head 11, and the placement table 13 is in a horizontal state.

[0046] Afterwards, the electric push rod works to move the pressure head 11 downward. The pressure head 11 contacts the two glass plates 132 for the first time and presses down to perform a zeroing operation. At this time, a reading is generated on the digital display indicator 12, and this reading is the reference reading involved in the subsequent measurement process. After the pressure head 11 moves upward, the staff removes the upper glass plate 132 and applies the material between the two glass plates 132. Then, the pressure head 11 is pressed down again and a force of a set value is set in the vertical direction. Another reading is obtained through the digital display indicator 12. The difference between the two readings is the film thickness of the material.

[0047] It should be additionally explained that electromagnets (not shown in the figure) are provided on the opposite surfaces of the two transverse sections of the locking block 311. After completing a single test process, the electromagnet is energized to attract the set area of the placement table 13. Then the electric guide rod works to drive the clamping plate 310 and the locking block 311 to move backward and reset. When the placement table 13 moves back to the conveyor belt, the electromagnet is de-energized, and then the drive motor resumes operation to drive the conveyor belt to transport the placement table 13 on it, so that the next placement table 13 to be tested moves to the rear of the placement guide rail 2, and the above operation process is repeated.

[0048] In summary, the guiding, positioning and testing operations of the placement table 13 are performed sequentially in batches.

[0049] It should be noted that when measuring the thickness between the two glass sheets 132, the end faces of the two glass sheets 132 need to be strictly cleaned to ensure the accuracy of the reference readings. In the subsequent testing process, the glass sheets 132 coated with the material to be tested will be stacked on the corresponding placement table 13, and the conveying unit 30 will continuously convey the placement table 13 to the rear side of the placement guide rail 2 for batch testing.

[0050] like Figure 6 As shown, the rear opening of the guide groove 31 is chamfered. Figure 4 As shown, guide grooves 312 are provided on the inner walls on both sides of the upper and lower sides of the longitudinal section of the guide groove 31. The guide groove 312 is composed of a guide section 313 and a limit section 314 from back to front. The horizontal cross-section of the guide section 313 is an isosceles trapezoid and the end with the smaller width faces the front. Four guide columns 315 arranged in a matrix are fixedly provided on the upper and lower end surfaces of the lower disk of the placement table 13. The width of the limit section 314 of the guide groove 312 is the same as the diameter of the guide column 315.

[0051] like Figure 4 and Figure 5 As shown, the U-shaped opening of the locking block 311 faces the front side, the front end surface of the upper horizontal section of the locking block 311 is an arc surface that fits the circumferential surface of the upper disk of the placing table 13, and the front end surface of the vertical section of the locking block 311 is an arc surface that fits the circumferential surface of the lower disk section. When the locking block 311 presses the placing table 13 onto the placing guide rail 2, the upper disk of the placing table 13 is tightly attached to the inner arc surface of the placing guide rail 2 and the arc surface of the upper horizontal section of the locking block 311, and the lower disk of the placing table 13 is tightly attached to the arc-shaped inner wall of the guide groove 31 and the arc surface on the vertical section of the locking block 311, thereby performing double-tight positioning on the placing table 13.

[0052] like Figure 5 and Figure 6As shown, two guide blocks 316 distributed left and right are fixedly provided on the upper and lower end surfaces of the clamping plate 310. During the sliding process of the guide block 316 in the guide section 313 of the corresponding guide groove 312, the movement process of the clamping plate 310 and the locking block 311 can be guided. Secondly, the position of the clamping plate 310 and the locking block 311 is limited by the cooperation between the limiting section 314 in the guide groove 312 and the guide block 316, ensuring that the set position on the locking block 311 can contact the placement table 13 in the subsequent process.

[0053] After the placement table 13 is transported to the rear of the placement guide rail 2, the guide column 315 is opposite to the corresponding avoidance groove 302 front and back, and the lower disc of the placement table 13 is initially opposite to the guide groove 31. Then the electric guide rod works so that its telescopic end drives the clamping plate 310, the locking block 311 and the bonding plate 320 to move forward synchronously. As the locking block 311 continues to move, the placement table 13 is pushed by the bonding plate 320 in the side locking part 32, and the lower disc of the placement table 13 is pushed into the guide groove 31. In this process, the avoidance groove 302 not only avoids the guide column 315, but also ensures that the lower disc of the placement table 13 can be accurately moved into the guide groove 31 through the cooperation between the avoidance groove 302 and the guide column 315.

[0054] After the placement platform 13 enters the guide groove 31, the guide posts 315 on the placement platform 13 enter the corresponding guide groove 312. The placement platform 13 is then gradually pushed forward. Because the width of the rear section of the guide section 313 is greater than the diameter of the guide posts 315, it facilitates the guide posts 315 to enter the guide groove 312. At the same time, it also guides the forward movement of the guide posts 315. Through the cooperation between the four guide posts 315 and the corresponding guide grooves 312, the placement platform 13 is initially in the set state. As the guide posts 315 move into the limiting section 314, the four guide posts 315 are arranged in the set state, that is, the placement platform 13 is limited and guided to the set state (at this time, the four plug-in cylinders 130 on the placement platform 13 are arranged in a diamond shape from front to back, see Figure 4 and Figure 8 ), so that the glass sheet 132 is in a set placement state. In summary, through the cooperation between the guide column 315 and the guide groove 312, the left and right directions of the placement platform 13 are limited.

[0055] Secondly, during the movement of the above-mentioned clamping plate 310, as the guide block 316 on the clamping plate 310 cooperates with the guide section 313 and the limit section 314 in the corresponding guide groove 31 in turn, the orientation of the clamping plate 310 and the locking block 311 is limited and guided, so that the arc surface of the vertical section of the locking block 311 can be accurately fitted and docked with the set area on the lower side disk of the placement table 13, ensuring the accuracy after subsequent locking, and avoiding the position deviation of the locking block 311 after movement affecting the position accuracy of the placement table 13, thereby indirectly leading to an increase in the overall test error.

[0056] like Figure 5 、 Figure 6 and Figure 7 As shown, the lower locking portion 33 also includes a U-shaped frame 331, and the opposite surfaces of the lower horizontal sections of the placement guide rail 2 and the locking block 311 are fixedly provided with U-shaped frames 331, and the two U-shaped frames 331 are opposite to each other front and back, and a plurality of tightening arc blocks 330 are respectively fixed at the middle position of the horizontal section and the two longitudinal sections of the U-shaped frame 331, and the tightening arc blocks 330 are all facing the corresponding plug-in tubes 130. After the tightening arc blocks 330 on adjacent longitudinal sections on different U-shaped frames 331 are closed, they wrap the plug-in tubes 130 on the left and right sides. The left and right sides of the U-shaped frame 331 are fixedly provided with docking blocks 332, and the rear end face of the front docking block 332 is fixedly provided with a docking rod 333 with an axis extending from front to back. After the locking block 311 is pressed against the placement disc, the docking rod 333 passes through the corresponding rear docking block 332.

[0057] like Figure 3 、 Figure 5 、 Figure 6 and Figure 7 As shown, the side locking portion 32 also includes a mounting rod 321, and the left and right sides of the clamping plate 310 slide forward and backward and pass through the mounting rod 321 with an axis extending from front to back. The bonding plate 320 is fixedly arranged on the front end surface of the corresponding mounting rod 321, and a spring 322 is fixedly arranged between the clamping plate 310 and the bonding plate 320 and is sleeved on the mounting rod 321. The front end surface of the clamping plate 310 is fixedly provided with a clamping block 323 for rigidly clamping the bonding plate 320 after contact. The front end surface of the bonding plate 320 is an arc-shaped surface that is tightly attached to the circumferential surface of the lower disk of the placement table 13, and the upper and lower inner walls of the front side of the guide groove 31 are fixedly provided with gaskets 324.

[0058] like Figure 5 and Figure 7 As shown, ribs 325 are fixedly provided on both upper and lower end surfaces of the laminating plate 320 , and laminating blocks 326 for pressing against adjacent guide pillars 315 are fixedly provided on the front end surfaces of the ribs 325 .

[0059] It should be noted that, during the forward movement of the pressing plate 310 , the pressing plate 310 first drives the laminating plate 320 thereon to contact the placement table 13 , and as the pressing plate 310 continues to move, the two laminating plates 320 push the placement table 13 .

[0060] As the bonding plate 320 gradually pushes the placement table 13 forward, the placement table 13 moves to the frontmost position of the guide groove 31, which is also the position set for subsequent tests. At this time, the front part of the lower disk of the placement table 13 moves between the two gaskets 324, and the bonding plate 320 continues to move. The spring 322 is compressed, and the elastic force generated by the compression deformation of the spring 322 acts on the bonding plate 320. Through the cooperation between the bonding plate 320 and the inner wall of the guide groove 31, the placement table 13 is elastically clamped in the front and back directions.

[0061] When the clamping plate 310 drives the clamping block 323 on it to contact the bonding plate 320, the placement table 13 is rigidly clamped in the front and rear directions through the mutual cooperation between the clamping plate 310, the clamping block 323 and the bonding plate 320 and the inner wall of the guide groove 31. At the same time, the locking block 311 contacts the placement table 13 during this process, and the lower side disc of the placement table 13 gradually gets stuck in the U-shaped area of the locking block 311. Secondly, with the above-mentioned multiple limit guides, the bonding block 326 also presses against the corresponding guide column 315, pressing the placement table 13 from different directions to improve the stability of the placement table 13. At this time, the placement table 13 is positioned in the upper and lower directions through the two gaskets 324 and the U-shaped area of the locking block 311 to ensure that the placement table 13 is in a horizontal state.

[0062] During the elastic tightening process, the plug-in tube 130 gradually approaches the tightening arc block 330 on the U-shaped frame 331 corresponding to the guide rail 2. During the above-mentioned rigid tightening process, the locking block 311 drives the tightening arc block 330 on it to approach the corresponding plug-in tube 130 through the corresponding U-shaped frame 331, and finally the tightening arc block 330 presses against the corresponding plug-in tube 130. At the same time, the corresponding middle tightening arc block 330 closes and locks the plug-in tube 130, and tightens and positions all the plug-in tubes 130 (and also the positioning pins 131) on the lower side of the placement table 13. During the above process, the docking rod 333 passes through the corresponding docking block 332. In summary, the docking rod 333 is used to form an integrated frame of all the tightening arc blocks 330, thereby improving the stability during the positioning and tightening process.

[0063] like Figure 3 、 Figure 4 、 Figure 5 and Figure 8As shown, the side locking portion 32 also includes a positioning rod 327. The front end surface of the bonding plate 320 is fixedly provided with a positioning rod 327 whose axis extends from front to back. The lower side disc of the placement table 13 and the placement guide rail 2 are both provided with positioning grooves 328 corresponding to the corresponding positioning rod 327. When the locking block 311 is pressed against the placement table 13, the positioning rod 327 passes through the corresponding positioning groove 328.

[0064] As the bonding plate 320 gradually contacts the placement table 13, the positioning rod 327 on the bonding plate 320 first gradually passes through the positioning groove 328 on the placement table 13, and then the bonding plate 320 pushes the placement table 13 to gradually move forward, and finally the positioning rod 327 passes through the positioning groove 328 on the placement guide rail 2. In the above process, the positioning rod 327 can not only guide the movement of the placement table 13, but also after the positioning rod 327 is inserted into the positioning groove 328 on the placement guide rail 2, it can also support and limit the placement table 13, so that the placement table 13, the placement guide rail 2, the bonding plate 320, the locking block 311 and the clamping plate 310 are an integrated force-bearing whole in the up and down directions, thereby improving the stability during the test.

[0065] In summary, through the cooperation between the locking block 311 and the inner wall of the guide groove 31 and the tight cooperation between the arc block 330 and the plug-in tube 130, the positioning lock of the placement table 13 in the front and rear directions is formed, the positioning lock of the placement table 13 in the up and down directions is formed by the U-shaped area of the locking block 311 and the two gaskets 324, and the circumferential positioning lock of the placement table 13 is formed between the bonding plate 320 and the placement guide rail 2. That is, the accuracy and stability of the placement table 13 after placement are improved through multiple positioning locking from top to bottom, thereby improving the accuracy and stability during the detection process.

[0066] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0067] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature designated as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0068] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "connected," "installed," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0069] The embodiments of this specific implementation method are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A dental material thickness tester, comprising: The test platform is provided with a frame, a pressure head is provided on the frame, a digital indicator for displaying the test results is provided on the frame, and a placement table for placing a glass plate is provided below the pressure head, characterized in that: A placement guide rail is fixedly provided on the test platform, and a positioning mechanism for positioning the placement table is provided on the placement guide rail; The rear side of the test platform is provided with a conveying unit for conveying the placement table to the rear of the placement guide rail; The positioning mechanism includes a guide groove, a guide groove is provided on the placement guide rail, the placement table slides in the guide groove, a clamping plate is provided in the guide groove for sliding back and forth, the clamping plate is driven by an electric guide rod to move back and forth, a locking block is fixedly provided on the front end surface of the clamping plate, the clamping plate drives the locking block to push the placement table, and the locking block and the guide groove lock the placement table back and forth; The abutting plate is provided with a side locking portion, which includes two left and right fitting plates. The locking block and the placement guide rail are jointly provided with a lower locking portion for locking the plug-in cylinder. The lower locking portion includes a plurality of abutting arc blocks for abutting the placement table. The guide groove guides the placement table to move forward, and the side locking part and the lower locking part perform multiple positioning and tightening on the placement table; The opening of the locking block faces the front side, the front end surface of the upper horizontal section of the locking block is an arc surface that fits the circumferential surface of the upper disk on the placement table, and the front end surface of the vertical section of the locking block is an arc surface that fits the circumferential surface of the lower disk section.

2. A dental material thickness tester according to claim 1, characterized in that: The rear opening of the guide groove is chamfered, and the upper and lower inner walls of the longitudinal section of the guide groove are provided with guide grooves. The upper and lower end surfaces of the lower disc of the placement table are fixed with four guide columns arranged in a matrix.

3. A dental material thickness tester according to claim 2, characterized in that: The guide groove is composed of a guide section and a limit section from back to front. The horizontal cross section of the guide section is an isosceles trapezoid with the end with the smaller width facing the front. The width of the limit section of the guide groove is the same as the diameter of the guide column.

4. A dental material thickness tester according to claim 3, characterized in that: Two guide blocks distributed left and right are fixedly provided on the upper and lower end surfaces of the clamping plate. During the sliding process of the guide block in the guide section of the corresponding guide groove, the positions of the clamping plate and the locking block are limited by guiding the movement process of the clamping plate and the locking block and the cooperation between the guide groove limit section and the guide block.

5. The dental material thickness tester according to claim 1, characterized in that: The lower locking part also includes a U-shaped frame, and the opposite surfaces of the lower horizontal sections where the guide rail and the locking block are placed are fixedly provided with U-shaped frames, the two U-shaped frames are opposite to each other front and back, and a plurality of tightening arc blocks are respectively fixed at the middle position of the transverse section of the U-shaped frame and on the two longitudinal sections, and the tightening arc blocks are all facing the corresponding plug-in tubes, and the tightening arc blocks on adjacent longitudinal sections on different U-shaped frames are closed to wrap the plug-in tubes on the left and right sides.

6. The dental material thickness tester according to claim 5, characterized in that: The left and right sides of the U-shaped frame are fixed with docking blocks, and the rear end face of the front docking block is fixed with a docking rod with an axis extending from front to back. After the locking block is pressed against the disc, the docking rod passes through the corresponding rear docking block.

7. The dental material thickness tester according to claim 1, characterized in that: The side locking portion also includes a mounting rod, and the left and right sides of the clamping plate slide forward and backward and pass through the mounting rod with an axis extending from front to rear, and the bonding plate is fixedly arranged on the front end surface of the corresponding mounting rod, and a spring sleeved on the mounting rod is fixedly arranged between the clamping plate and the bonding plate, and the front end surface of the clamping plate is fixedly provided with a clamping block for rigidly clamping the bonding plate after contact, and the front end surface of the bonding plate is an arc-shaped surface that is tightly attached to the circumferential surface of the lower side disc of the placement table, and gaskets are fixedly provided on the upper and lower inner walls of the front side of the guide groove.

8. The dental material thickness tester according to claim 2, characterized in that: The upper and lower end surfaces of the laminating plate are both fixedly provided with ribs, and the front end surface of the rib is fixedly provided with a laminating block for pressing against adjacent guide columns.

9. The dental material thickness tester according to claim 1, characterized in that: The side locking portion also includes a positioning rod, and the front end surface of the bonding plate is fixedly provided with a positioning rod with an axis extending from front to back. The lower side disc and the placement guide rail of the placement table are both provided with positioning grooves corresponding to the corresponding positioning rods. When the locking block is pressed against the placement table, the positioning rod passes through the corresponding positioning groove.

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