Dental material thickness tester

Abstract

The invention relates to the technical field of dental materials, in particular to a dental material thickness tester which comprises a positioning mechanism, a side locking part and a lower locking part. According to the invention, the glass sheets are manually assembled to the corresponding placement tables, the placement tables are transferred to the rear side of the placement guide rail through the conveying assembly, and the placement tables are accurately moved to the set operation position through the positioning mechanism, so that the interference of manual operation on the testing process is reduced, the overall testing efficiency is improved, the requirements of repeated testing are conveniently met, and the testing efficiency is improved. And through positioning and guiding of a side locking part, a lower locking part and a placement guide rail in the positioning mechanism, multiple positioning and locking from top to bottom are carried out on the placement table moving to the set operation position, the accuracy of the placement table after movement is improved, and errors in the testing process are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of dental materials, and particularly to a thickness tester for dental materials. Background Art

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

[0003] For dental cements, although specific thickness requirements are not emphasized as much as those of the restorations themselves, the uniformity and appropriate thickness of the application layer are still one of the key factors to ensure long-term success. Therefore, it is necessary to test the thickness of dental cements.

[0004] Currently, when performing thickness testing, first, a vertical force is applied to two glass plates by an existing acting cylinder, and the distance between the two glass plates is measured by a digital display meter to obtain the first value. Then, the dental cement to be tested is applied between the two glass plates. The acting cylinder repeats the pressing action for a set time to ensure that the test material completely fills the space between the two glass plates, and another value is obtained through the digital display meter. The difference between the two obtained values is the measured thickness.

[0005] In the current existing thickness testing process, it is necessary to manually stack two glass plates on the placement platform first, and the glass plates need to be placed between four corresponding positioning pins on the placement platform. Secondly, after measuring the distance between the two glass plates, it is necessary to manually remove the glass plates and apply the material to be tested, and then repeat the loading for testing. The whole process is manually operated. And to avoid differences in the performance of the cements within the same batch and improve data accuracy, multiple tests need to be carried out on dental materials, that is, batch testing is required. However, currently, the glass plates are loaded and placed and removed manually, so the operation efficiency of the current testing process is not good, which is not conducive to multiple repeated tests.

[0006] Secondly, during the process of replacing or moving the glass plates, the position of the placement platform and the position of the glass plates are affected, thus indirectly affecting the subsequent thickness test results of the vertical pressing and increasing the error of the overall test value. Summary of the Invention

[0007] Based on this, it is necessary to provide a thickness tester for dental materials, aiming to solve the problems of the above-mentioned existing technologies.

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

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

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

[0011] The positioning mechanism includes a guiding groove, the guiding groove is opened on the placing guide rail, the placing table slides in the guiding groove, a pressing plate is slidably arranged back and forth in the guiding groove, the pressing plate is driven by an electric guide rod to move back and forth, a locking block is fixedly provided on the front end face of the pressing plate, and the pressing plate drives the locking block to push the placing table and locks the placing table back and forth by the locking block and the inner wall of the guiding groove.

[0012] A side locking portion is provided on the pressing plate, the side locking portion includes two fitting plates distributed left and right, and a lower locking portion for locking the inserting cylinder is jointly provided on the locking block and the placing guide rail, and the lower locking portion includes a plurality of pressing arc blocks for pressing the placing table.

[0013] The guiding groove guides the placing table to move forward, and the side locking portion and the lower locking portion perform multiple positioning and pressing on the placing table.

[0014] According to an advantageous embodiment, the rear opening of the guiding groove is chamfered, guiding grooves are opened on both the upper and lower inner walls of the longitudinal section of the guiding groove, and four guiding columns arranged in a matrix are fixedly provided on both the upper and lower end faces of the lower disc of the placing table.

[0015] According to an advantageous embodiment, the guiding groove is sequentially a guiding section and a limiting section from back to front, the horizontal cross-section of the guiding section is an isosceles trapezoid and the end with a smaller width faces forward, and the width of the limiting section of the guiding groove is the same as the diameter of the guiding column.

[0016] According to an advantageous embodiment, the opening of the locking block faces forward, the front end face of the upper horizontal section of the locking block is an arc surface that fits the circumferential surface of the upper disc of the placing table, and the front end face of the vertical section of the locking block is an arc surface that fits the circumferential surface of the lower disc section.

[0017] According to an advantageous embodiment, two guiding blocks distributed left and right are fixedly provided on both the upper and lower end faces of the pressing plate. During the sliding process of the guiding blocks in the guiding section of the corresponding guiding groove, the moving process of the pressing plate and the locking block is guided, and the position of the pressing plate and the locking block is limited through the cooperation between the limiting section in the guiding groove and the guiding blocks.

[0018] According to an advantageous embodiment, the lower locking portion further includes a U-shaped frame. U-shaped frames are fixedly provided on the opposite surfaces of the horizontal section at the lower side of the placement guide rail and the locking block. The two U-shaped frames face each other front and back. A plurality of abutting arc blocks are respectively fixedly provided at the middle position of the transverse section of the U-shaped frame and on the two longitudinal sections. The abutting arc blocks all face the corresponding insertion cylinder. The abutting arc blocks on the adjacent longitudinal sections of different U-shaped frames wrap the insertion cylinders on the left and right sides after being closed.

[0019] According to an advantageous embodiment, docking blocks are fixedly provided on both the left and right sides of the U-shaped frame. A docking rod with an axis extending from front to back is fixedly provided on the rear end surface of the front docking block. After the locking block abuts against the placement disc, the docking rod penetrates through the corresponding rear docking block.

[0020] According to an advantageous embodiment, the side locking portion further includes mounting rods. Mounting rods with an axis extending from front to back penetrate through the left and right sides of the abutting plate in a front-to-back sliding manner. A fitting plate is fixedly provided on the front end surface of the corresponding mounting rod. A spring sleeved on the mounting rod is fixedly provided between the abutting plate and the fitting plate. An abutting block for rigidly abutting against the fitting plate after contact is fixedly provided on the front end surface of the abutting plate. The front end surface of the fitting plate is an arc surface that closely adheres to the circumferential surface of the lower disc of the placement table. Gaskets are fixedly provided on the upper and lower inner walls of the front side of the guiding groove.

[0021] According to an advantageous embodiment, rib plates are fixedly provided on both the upper and lower end surfaces of the fitting plate. Fitting blocks for abutting against adjacent guide posts are fixedly provided on the front end surfaces of the rib plates.

[0022] According to an advantageous embodiment, the side locking portion further includes positioning rods. Positioning rods with an axis extending from front to back are fixedly provided on the front end surface of the fitting plate. The lower disc of the placement table and the placement guide rail are both provided with positioning grooves corresponding to the corresponding positioning rods. When the locking block abuts against the placement table, the positioning rod penetrates through the corresponding positioning groove.

[0023] In summary, the present invention has at least the following beneficial effects: First, in the present invention, the glass sheet is manually assembled onto the corresponding placement table, the placement table is transferred to the rear side of the placement guide rail by the conveying assembly, and the placement table is accurately moved to the set working position by the positioning mechanism, reducing the interference of manual operation on the testing process, improving the overall testing efficiency, facilitating the adaptation to the needs of repeated testing, and through the positioning and guidance of the side locking portion, lower locking portion and placement guide rail in the positioning mechanism, performing multi-layer positioning and locking from top to bottom on the placement table moved to the set working position, improving the accuracy of the placement table after movement and reducing the error in 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 sheet 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 be accurately fitted and docked with the set area on the lower side disk of the placement table, ensuring the accuracy after subsequent locking, avoiding the position deviation of the locking block after movement that affects the position accuracy of the placement table, 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 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 drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

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

[0028] Figure 2 A partial structural schematic 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 support 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 6Shows a rear view of the pressing plate, the placement guide rail and the docking rod provided according to an embodiment of the present invention.

[0033] Figure 7 Shows a schematic diagram of a partial sectional structure among the locking block, the fitting plate and the fitting block provided according to an embodiment of the present invention.

[0034] Figure 8 Shows a schematic diagram of a partial sectional structure of the placement table provided according to an embodiment of the present invention.

[0035] Among them, the above-mentioned drawings include the following reference numerals: 1, test platform; 10, frame; 11, pressing head; 12, digital display indicator; 13, placement table; 130, insertion cylinder; 131, positioning pin; 132, glass sheet plate; 2, placement guide rail; 3, positioning mechanism; 30, conveying unit; 300, conveying component; 301, supporting bracket; 302, avoidance groove; 31, guiding groove; 310, pressing plate; 311, locking block; 312, guiding groove; 313, guiding section; 314, limiting section; 315, guiding column; 316, guiding block; 32, side locking part; 320, fitting plate; 321, mounting rod; 322, spring; 323, pressing block; 324, gasket; 325, rib plate; 326, fitting block; 327, positioning rod; 328, positioning groove; 33, lower locking part; 330, pressing arc block; 331, U-shaped frame; 332, docking block; 333, docking rod. Detailed implementation manners

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the following will describe the detailed implementation manners of the present invention in conjunction with the drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

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

[0038] As Figure 1 and Figure 8As shown, a U-shaped placement guide rail 2 is fixedly arranged on the upper end surface of the test platform 1. 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 arranged on the placement guide rail 2. The placement table 13 consists of two discs, the diameter of the upper disc is smaller than that of the lower disc. Four circumferentially distributed insertion cylinders 130 are installed through the placement table 13. A positioning pin 131 for positioning the glass sheet plate 132 is inserted into the insertion cylinder 130. Two glass sheet plates 132 are placed between the four positioning pins 131 in a stacked manner, one on top of the other.

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

[0040] As Figure 1 and Figure 3 shown, a conveying unit 30 for conveying the placement table 13 to the exact rear of the placement guide rail 2 is arranged at 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 convey the placement table 13. The four supporting brackets 301 are divided into left and right groups. The two supporting brackets 301 in each group are distributed front and rear and fixedly arranged on the test platform 1, and the two groups of supporting brackets 301 are respectively located on the left and right sides of the guiding groove 31. An avoidance groove 302 is formed on the supporting bracket 301.

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

[0042] As Figure 3 、 Figure 4 and Figure 5 shown, side locking parts 32 are jointly arranged on the left and right sides of the front end surface of the pressing plate 310. The side locking parts 32 include two attaching plates 320 which are distributed left and right and are both arranged on the pressing plate 310.

[0043] As Figure 5 and Figure 7As shown in the figure, a lower locking portion 33 for locking the insertion cylinder 130 is provided on both the locking block 311 and the placement guide rail 2, and is located below the placement table 13. The lower locking portion 33 includes a plurality of abutting arc blocks 330. The movement of the abutting plate 310 causes the abutting arc blocks 330 to abut against the insertion cylinder 130 and lock the insertion cylinder 130.

[0044] It should be noted that, in order to reduce the external interference on the placement table 13 during the detection process and the conveying process, a housing for protecting the conveying process and the testing process is fixedly provided on the testing platform 1. Refer to Figure 1 , the conveying component 300 adopts the prior art, and any prior art with the same conveying function can be used for substitution.

[0045] First, manually assemble the placement table 13 for batch testing and the glass sheet 132 (assemble the two glass sheets 132 in a stacked manner). Then, place the placement table 13 on the conveyor belt in the conveying component 300. At the same time, the driving motor works, so that the placement table 13 is conveyed from left to right. When the placement table 13 moves to the directly rear of the placement guide rail 2, the driving motor stops working. The electric guide rod works to make the abutting plate 310 move from back to front. During the movement, the abutting plate 310 pushes the placement table 13, and the placement table 13 moves to directly below the indenter 11. During this process, through the cooperation between the guiding groove 31 and the placement table 13, the movement of the placement table 13 is guided, and at the same time, the position of the abutting plate 310 is limited and guided to ensure that the set end face of the locking block 311 can abut against the placement table 13 subsequently. Finally, the abutting plate 310 drives the locking block 311 to abut the placement table 13 in the guiding groove 31. At this time, the side locking portion 32 locks the left and right sides of the placement table 13, and the lower locking portion 33 positions and locks the four insertion cylinders 130. In summary, it is ensured that the placement table 13 moves to directly below the indenter 11 and the placement table 13 is in a horizontal state.

[0046] After that, the electric push rod works to make the indenter 11 move downward. The indenter 11 first contacts the two glass sheets 132 and presses down for zeroing operation, that is, a reading is generated on the digital display indicator 12 at this time, and this reading is the reference reading involved in the subsequent measurement process. After the indenter 11 moves upward, the staff takes out the upper glass sheet 132 and applies the material between the two glass sheets 132. Then the indenter 11 presses down again, and a set value of force is applied in the vertical direction. Another reading is obtained through the digital display indicator 12, and the difference between the two obtained readings is the film thickness of the material.

[0047] It should be further noted that electromagnets (not shown in the figure) are provided on the opposite surfaces of the two transverse segments of the locking block 311. After the completion of a single test process, the electromagnets are energized to attract the set area of the placement table 13. Then, the electric guide rod operates to drive the pressing plate 310 and the locking block 311 to move backward and reset. When the placement table 13 moves backward to the conveyor belt again, the electromagnets are de-energized. Then, the drive motor resumes operation to drive the conveyor belt to convey the placement table 13 thereon, 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 carried out batch by batch in sequence.

[0049] It should be further noted that when measuring the thickness between the two glass sheet plates 132, the end faces of the two glass sheet plates 132 need to be strictly cleaned to ensure the accuracy of the reference reading. In the subsequent test process, the glass sheet plates 132 coated with the material to be tested are stacked on the corresponding placement table 13, and the conveying unit 30 continuously conveys the placement table 13 to the rear of the placement guide rail 2 and conducts batch testing.

[0050] As Figure 6 shown, the rear opening of the guiding groove 31 is chamfered. As Figure 4 shown, guiding grooves 312 are provided on the upper and lower inner walls of the longitudinal section of the guiding groove 31. The guiding grooves 312 are successively a guiding section 313 and a limiting section 314 from the rear to the front. The horizontal section of the guiding section 313 is an isosceles trapezoid and the end with a smaller width faces the front side. Four guiding columns 315 arranged in a matrix are fixedly provided on the upper and lower end faces of the lower disc of the placement table 13, and the width of the limiting section 314 of the guiding groove 312 is the same as the diameter of the guiding column 315.

[0051] As Figure 4 and Figure 5 shown, the U-shaped opening of the locking block 311 faces the front side. The front end face of the upper horizontal section of the locking block 311 is an arc surface that fits the circumferential surface of the upper disc of the placement table 13, and the front end face of the vertical section of the locking block 311 is an arc surface that fits the circumferential surface of the lower disc section. When the locking block 311 presses the placement table 13 against the placement guide rail 2, the upper disc of the placement table 13 is in close contact with the inner arc surface of the placement guide rail 2 and the arc surface of the upper horizontal section of the locking block 311, and the lower disc of the placement table 13 is in close contact with the arc-shaped inner wall of the guiding groove 31 and the arc surface on the vertical section of the locking block 311, thereby performing double pressing and positioning on the placement table 13.

[0052] As Figure 5 and Figure 6As shown, two guiding blocks 316 distributed left and right are fixedly arranged on the upper and lower end faces of the pressing plate 310. During the sliding process of the guiding blocks 316 in the guiding section 313 of the corresponding guiding groove 312, the moving processes of the pressing plate 310 and the locking block 311 can be guided. Secondly, through the cooperation between the limiting section 314 in the guiding groove 312 and the guiding blocks 316, the positions of the pressing plate 310 and the locking block 311 are limited to ensure 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 conveyed to the exact rear of the placement guide rail 2, at this time, the guide post 315 and the corresponding avoidance groove 302 are opposite to each other front and back, and the lower disk of the placement table 13 is initially opposite to the guiding groove 31. Then the electric guide rod works, and its telescopic end drives the pressing plate 310, the locking block 311, and the fitting plate 320 to move forward synchronously. As the locking block 311 continues to move, the placement table 13 is pushed by the fitting plate 320 in the side locking portion 32. The lower disk of the placement table 13 is pushed into the guiding groove 31. During this process, the avoidance groove 302 not only avoids the guide post 315, but also ensures that the lower disk of the placement table 13 can accurately enter the guiding groove 31 through the cooperation between the avoidance groove 302 and the guide post 315.

[0054] After the placement table 13 enters the guiding groove 31, the guide posts 315 on the placement table 13 enter the corresponding guiding grooves 312. Then the placement table 13 is gradually pushed forward. Since the width of the rear section of the guiding section 313 is greater than the diameter of the guide post 315, it is convenient for the guide post 315 to enter the guiding groove 312, and at the same time, it also guides the forward movement process of the guide post 315. Through the cooperation between the four guide posts 315 and the corresponding guiding grooves 312, the placement table 13 is initially in a set state. As the guide posts 315 move into the limiting section 314, the four guide posts 315 are arranged in a set state, that is, the placement table 13 is limited and guided to a set state (at this time, the four insertion cylinders 130 on the placement table 13 are distributed in a rhombus from front to back, refer to Figure 4 and Figure 8 ), so that the glass sheet plate 132 is in a set placement state. In summary, through the cooperation between the guide posts 315 and the guiding grooves 312, the left and right directions of the placement table 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 position 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 fixedly provided at the middle position of the transverse 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 tube 130, and the tightening arc blocks 330 on adjacent longitudinal sections on different U-shaped frames 331 are closed to wrap the plug-in tube 130 on the left and right sides, and 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, and 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 are both slidable forward and backward and penetrated by a mounting rod 321 with an axis extending from front to rear, and the bonding plate 320 is fixedly arranged on the front end surface of the corresponding mounting rod 321, and a spring 322 sleeved on the mounting rod 321 is fixedly arranged between the clamping plate 310 and the bonding plate 320, and a clamping block 323 is fixedly arranged on the front end surface of the clamping plate 310 for rigidly clamping the bonding plate 320 after contact, and the front end surface of the bonding plate 320 is an arc-shaped surface tightly attached to the circumferential surface of the lower disk of the placement table 13, and gaskets 324 are fixedly arranged on the upper and lower inner walls of the front side of the guide groove 31.

[0058] like Figure 5 and Figure 7 As shown, ribs 325 are fixedly provided on both upper and lower end surfaces of the bonding plate 320 , and bonding blocks 326 for pressing against adjacent guide pillars 315 are fixedly provided on the front end surface 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 fitting plate 320 thereon to contact the placement table 13, and as the pressing plate 310 continues to move, the two fitting plates 320 push the placement table 13.

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

[0061] When the pressing block 323 on the pressing plate 310 contacts the fitting plate 320, through the mutual cooperation between the pressing plate 310, the pressing block 323, the fitting plate 320 and the inner wall of the guiding groove 31, the placement table 13 is rigidly clamped in the front-rear direction. At the same time, during this process, the locking block 311 contacts the placement table 13, and the lower disc of the placement table 13 gradually snaps into the U-shaped area of the locking block 311. Secondly, with the above-mentioned multiple limit guiding, the fitting block 326 also presses against the corresponding guiding column 315, pressing against 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 up-down direction by 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 pressing process, the insertion cylinder 130 gradually approaches the pressing arc block 330 on the U-shaped frame 331 corresponding to the placement guide rail 2. During the above-mentioned rigid pressing process, the locking block 311 drives the pressing arc block 330 thereon to approach the corresponding insertion cylinder 130 through the corresponding U-shaped frame 331. Finally, the pressing arc block 330 presses against the corresponding insertion cylinder 130, and at the same time, the middle pressing arc block 330 closes to lock the insertion cylinder 130, pressing and positioning all the insertion cylinders 130 (which are also the positioning pins 131) on the lower side of the placement table 13. During the above process, the docking rod 333 penetrates the corresponding docking block 332. In summary, through the docking rod 333, all the pressing arc blocks 330 form an integrated framework, improving the stability during the positioning and pressing process.

[0063] As Figure 3 、 Figure 4 、 Figure 5 and Figure 8As shown, the side locking portion 32 further includes a positioning rod 327. A positioning rod 327 with an axis extending from front to back is fixedly provided on the front end face of the fitting plate 320. Positioning grooves 328 corresponding to the corresponding positioning rods 327 are provided on both the lower disc of the placement table 13 and the placement guide rail 2. When the locking block 311 abuts against the placement table 13, the positioning rod 327 penetrates through the corresponding positioning groove 328.

[0064] During the process that the fitting plate 320 gradually contacts the placement table 13, the positioning rod 327 on the fitting plate 320 first gradually passes through the positioning groove 328 on the placement table 13, and then the fitting plate 320 pushes the placement table 13 to gradually move forward. Finally, the positioning rod 327 passes through the positioning groove 328 on the placement guide rail 2. During the above process, the movement process of the placement table 13 can be guided by the positioning rod 327. At the same time, after the positioning rod 327 is inserted into the positioning groove 328 on the placement guide rail 2, it can also play a role of supporting and limiting the placement table 13, so that the placement table 13, the placement guide rail 2, the fitting plate 320, the locking block 311 and the pressing plate 310 form an integral force-receiving body in the up-and-down direction, improving the stability during the testing process.

[0065] In summary, through the cooperation between the locking block 311 and the inner wall of the guiding groove 31 and the pressing fit between the pressing arc block 330 and the insertion cylinder 130, the positioning and locking of the placement table 13 in the front-back direction are formed. Through the U-shaped area of the locking block 311 and the two gaskets 324, the positioning and locking of the placement table 13 in the up-and-down direction are formed. Through the fitting between the fitting plate 320 and the placement guide rail 2, the circumferential positioning and locking of the placement table 13 are formed. That is, through multiple positioning and locking from top to bottom, the accuracy and stability of the placement table 13 after placement are improved, and further the accuracy and stability during the detection process are improved.

[0066] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description. Without contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so they cannot be understood as limiting the protection scope of the present invention; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0067] In addition, the terms "first", "second", "No. 1", and "No. 2" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", "No. 1", or "No. 2" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "a plurality" is 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 clearly specified and defined, the terms "arranged", "connected", "installed", and "connected" 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 invention can be understood according to specific circumstances.

[0069] The embodiments of the specific implementation manners are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope 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 result 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 rail, wherein the test platform is fixedly provided with a placement rail, and a positioning mechanism for positioning the placement table is provided on the placement rail; 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; The positioning mechanism includes a guide groove, the placement guide rail is provided with a guide groove, 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 front and back; 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, and the lower locking portion includes a plurality of abutting arc blocks for abutting against the placement table. 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.

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, and four guide columns arranged in a matrix are fixedly provided on the upper and lower end surfaces of the lower disc of the placement table.

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 a 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 1, characterized in that: 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 arcuate 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 arcuate surface that fits the circumferential surface of the lower disk section.

5. A dental material thickness tester according to claim 3, characterized in that: The upper and lower end surfaces of the clamping plate are fixedly provided with two guide blocks distributed on the left and right. 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 of the clamping plate and the locking block and the cooperation between the limiting section of the guide groove and the guide block.

6. A 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 section 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 fixedly provided 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.

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

8. A 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 penetrate the mounting rod with an axis extending from front to rear, 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 a clamping block is fixedly arranged on the front end surface of the clamping plate 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 disk of the placement table, and gaskets are fixedly arranged on the upper and lower inner walls of the front side of the guide groove.

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

10. A dental material thickness tester according to claim 1, characterized in that: The side locking part 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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