A performance testing device for a phonetic english alphabet

Abstract

The application provides a pronunciation English alphabet performance testing device, and belongs to the technical field of pronunciation English alphabet performance testing, and comprises a supporting mechanism, a fixing mechanism, a pressing mechanism, a pulling mechanism, a pushing mechanism, an adjusting mechanism and a No.2 air cylinder. The pulling mechanism changes the speed of the pulling plate for sequentially pulling the plurality of T-shaped cylindrical rods by changing the rotating speed of the forward and reverse motor, so as to press the keys on the alphabet at different speeds. The pushing mechanism repeatedly pushes the plurality of T-shaped cylindrical rods through the pushing plate, so as to continuously press the keys on the alphabet. The adjusting mechanism adjusts the distance between the T-shaped cylindrical rod and the alphabet by manually rotating the No.2 eccentric wheel and using the positioning pin, and repeats the working process of the pulling mechanism and the pushing mechanism, so as to press the keys on the alphabet at different forces.

Description

Technical Field

[0001] This invention relates to the field of performance testing technology for the pronunciation of the English alphabet, specifically to a performance testing device for the pronunciation of the English alphabet. Background Technology

[0002] A pronunciation English alphabet, also known as a pronunciation-enabled poster alphabet, is a tool that graphically represents the pronunciation of English letters. After the pronunciation alphabet is manufactured, its performance needs to be tested to prevent defective products.

[0003] Currently, when testing the key performance of the English alphabet, only one type of key pressing performance can be tested, without comprehensive pressing performance testing. This results in low accuracy of key pressing performance testing and compromises the quality of the English alphabet. Furthermore, there is currently no dedicated performance testing device for the keys on the English alphabet, and most testing is still done manually, which is labor-intensive and inefficient. Summary of the Invention

[0004] This invention provides a device for testing the performance of the English alphabet, in order to solve the problems mentioned in the background art, such as the current lack of comprehensive performance testing of the keys on the English alphabet and the high manpower consumption and low testing efficiency.

[0005] This invention provides a performance testing device for the pronunciation of the English alphabet, comprising a support mechanism, a fixing mechanism, a pressing mechanism, a tossing mechanism, a pushing mechanism, an adjusting mechanism, and a second cylinder. The fixing mechanism is located in the middle of the support mechanism, the pressing mechanism is located in front of the fixing mechanism, the tossing mechanism is located in front of the pressing mechanism, a pushing mechanism is located above the pressing and tossing mechanisms, an adjusting mechanism is located in front of the pushing mechanism, and a second cylinder is located below the adjusting mechanism. The support mechanism includes a rectangular groove, a rectangular baffle, a U-shaped support frame, and sliding grooves. A circular hole is provided in the middle of the rear end of the rectangular groove, a rectangular baffle is fixedly installed at the upper front end of the rectangular groove, a U-shaped support frame is provided in front of the rectangular groove, sliding grooves are provided on both the left and right sides of the U-shaped support frame, a scale line is provided on the upper surface of the left side wall of the U-shaped support frame, a clearance hole is provided on the horizontal section of the U-shaped support frame, and through clearance grooves are provided on both sliding grooves.

[0006] The fixing mechanism includes a fixing plate, a suspension nail, and a fixing unit. The fixing plate is slidably disposed in a rectangular groove. A suspension nail is fixedly disposed on the upper middle part of the front side of the fixing plate. A fixing unit is disposed at each of the four corners of the fixing plate.

[0007] The pressing mechanism includes a rectangular rod, a T-shaped cylindrical rod, and a return spring. The left and right ends of the rectangular rod are slidably disposed in two grooves. Multiple stepped cylindrical holes are evenly opened along the length of the rectangular rod. The larger diameter end of the stepped cylindrical hole is close to the alphabet. A corresponding T-shaped cylindrical rod is installed in the stepped cylindrical hole. The front end of the T-shaped cylindrical rod is hemispherical. A return spring is fixedly connected to the end face of the larger diameter end of the stepped cylindrical hole. The other end of the return spring is fixedly connected to the front end face of the horizontal section of the T-shaped cylindrical rod, and the return spring is sleeved on the vertical section of the T-shaped cylindrical rod.

[0008] The actuating mechanism includes a second rectangular rod, an actuating rod, a connecting block, a second return spring, and a U-shaped frame. The left and right ends of the second rectangular rod are slidably disposed in two grooves. A pointer is located on the upper end of the second rectangular rod near the left side of the U-shaped support frame. The second rectangular rod is located in front of the first rectangular rod. The second rectangular rod is a hollow structure with open ends, and rectangular through slots communicating with its hollow structure are opened on both the front and rear sides of the second rectangular rod. The actuating rod is slidably disposed in the rectangular through slot of the second rectangular rod. The rear end of the actuating rod is a hemispherical shape that abuts against the front end of the T-shaped cylindrical rod. The second rectangular rod and the first rectangular rod are fixedly connected by two connecting blocks near the left and right sides of the U-shaped support frame. The second return spring is fixedly connected to the front side of each of the two grooves. The other end of the second return spring is fixedly connected to the front side of the second rectangular rod. A U-shaped frame is fixedly disposed in the middle of the front side of the second rectangular rod.

[0009] The extrusion mechanism includes a support frame, an extrusion plate, a horizontal plate, and a No. 3 return spring. The two ends of the support frame are fixedly mounted on two connecting blocks. A rectangular hole penetrating both the upper and lower surfaces is opened on the support frame. The extrusion plate is slidably mounted in the rectangular hole. The lower end of the extrusion plate is an inclined surface that abuts against the front end of the T-shaped cylindrical rod. A horizontal plate is fixedly mounted on the lower end of the front side of the extrusion plate. Multiple No. 3 return springs are evenly arranged along the length of the horizontal plate. The lower ends of the multiple No. 3 return springs are fixedly connected to the upper end surface of the horizontal plate, and the upper ends of the No. 3 return springs are fixedly connected to the lower end surface of the horizontal section of the support frame.

[0010] In one possible implementation, the fixing mechanism further includes a fixing wedge and a first cylinder. The fixing wedge is fixedly disposed on the lower middle part of the rear side of the fixing plate. The rear side of the fixing wedge is fixedly connected to the telescopic end of the first cylinder. The first cylinder is fixedly disposed in the round hole in the middle of the rear end of the rectangular groove.

[0011] In one possible implementation, the fixing unit includes cylindrical rods and fixing blocks. Four cylindrical rods are fixedly disposed at the four corners of the fixing plate, and fixing blocks are rotatably disposed on each of the four cylindrical rods. The rear side of the fixing block is convex, and the distance from the convex side of the fixing block to the front side of the fixing plate is less than the thickness of the alphabet.

[0012] In one possible implementation, the actuating mechanism further includes a rack, an L-shaped plate, a forward and reverse motor, and a gear. The rack is slidably disposed in the rectangular through groove of the second rectangular rod. An L-shaped plate is fixedly disposed in the middle of the lower side of the second rectangular rod. A forward and reverse motor is fixedly disposed on the horizontal section of the L-shaped plate. A gear is fixedly disposed on the output shaft of the forward and reverse motor. The gear meshes with the rack and is located in the middle of the U-shaped frame.

[0013] In one possible implementation, the extrusion mechanism further includes a support platform, a drive motor, and a first eccentric wheel. The support platform is fixedly mounted on the U-shaped frame, and the drive motor is fixedly mounted on the support platform. The first eccentric wheel is fixedly mounted on the output shaft of the drive motor, and the edge of the first eccentric wheel slides against the upper end face of the extrusion plate.

[0014] In one possible implementation, the adjusting mechanism includes a fixed shaft, a second eccentric wheel, a positioning plate, and positioning pins. The fixed shaft is fixedly mounted on the U-shaped support frame, and the second eccentric wheel is rotatably mounted on the fixed shaft. The second eccentric wheel has multiple positioning holes circumferentially open. The positioning plate is fixedly mounted on the fixed shaft, and the second eccentric wheel is located above the positioning plate. The positioning plate has limiting holes of the same size as the positioning holes on the second eccentric wheel evenly opened from front to back. The positioning pin is inserted from top to bottom into the positioning holes on the second eccentric wheel and simultaneously into the limiting holes on the positioning plate.

[0015] In one possible implementation, the telescopic end of the second cylinder is fixedly connected to the lower end face of the U-shaped support frame.

[0016] Beneficial effects: 1. The toggle mechanism provided by the present invention changes the speed at which the toggle plate moves sequentially on multiple T-shaped cylindrical rods by changing the rotation speed of the forward and reverse motors, thereby pressing the keys on the alphabet at different speeds.

[0017] 2. The extrusion mechanism provided by the present invention uses an extrusion plate to repeatedly extrude multiple T-shaped cylindrical rods, thereby continuously pressing the keys on the alphabet.

[0018] 3. The adjustment mechanism provided by this invention adjusts the distance between the T-shaped cylindrical rod and the alphabet by manually rotating the second eccentric wheel and using the positioning pin. It also repeats the working process of the toggle mechanism and the push mechanism to press the keys on the alphabet with different forces. By pressing the keys with different speeds, different forces and continuously, the pressure resistance of the keys on the alphabet is tested from three aspects. The corresponding test results are more comprehensive and representative than a single pressing test. Attached Figure Description

[0019] Figure 1 This is a first-view three-dimensional structural diagram of the present invention.

[0020] Figure 2 This is a second-view three-dimensional structural diagram of the present invention.

[0021] Figure 3 This is a top view of the fixing mechanism of the present invention.

[0022] Figure 4 This is a three-dimensional structural diagram of the fixing mechanism of the present invention.

[0023] Figure 5 This is a first-view three-dimensional structural diagram of the pressing mechanism and the actuating mechanism of the present invention.

[0024] Figure 6 This is a second-view three-dimensional structural diagram of the pressing mechanism and the actuating mechanism of the present invention.

[0025] Figure 7 This is a three-dimensional structural diagram of the pressing mechanism and the pushing mechanism of the present invention.

[0026] Figure 8 This is a three-dimensional structural schematic diagram of the adjustment mechanism of the present invention.

[0027] Figure 9 This is a cross-sectional view of the pressing mechanism of the present invention.

[0028] In the diagram: 1. Support mechanism; 11. Rectangular groove; 12. Rectangular baffle; 13. U-shaped support frame; 14. Slide groove; 2. Fixing mechanism; 21. Fixing plate; 22. Suspension nail; 23. Fixing unit; 231. Cylindrical rod; 232. Fixing block; 24. Fixing wedge; 25. Cylinder No. 1; 3. Pressing mechanism; 31. Rectangular rod No. 1; 32. T-shaped cylindrical rod; 33. Return spring No. 1; 4. Actuating mechanism; 41. Rectangular rod No. 2; 42. Rack; 4 3. Actuating lever; 44. L-shaped plate; 45. Forward and reverse motor; 46. Gear; 47. Connecting block; 48. Second return spring; 49. U-shaped frame; 5. Pushing mechanism; 51. Support frame; 52. Pushing plate; 53. Horizontal plate; 54. Third return spring; 55. Support platform; 56. Drive motor; 57. First eccentric wheel; 6. Adjusting mechanism; 61. Fixed shaft; 62. Second eccentric wheel; 63. Positioning plate; 64. Positioning pin; 7. Second cylinder. Detailed Implementation

[0029] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described below, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] Please see Figure 1 and Figure 2 A performance testing device for the pronunciation of the English alphabet includes a support mechanism 1, a fixing mechanism 2, a pressing mechanism 3, a tossing mechanism 4, a pushing mechanism 5, an adjusting mechanism 6, and a second cylinder 7. The fixing mechanism 2 is located in the middle of the support mechanism 1. The pressing mechanism 3 is located in front of the fixing mechanism 2. The tossing mechanism 4 is located in front of the pressing mechanism 3. The pushing mechanism 5 is located above and between the pressing mechanism 3 and the tossing mechanism 4. The adjusting mechanism 6 is located in front of the pushing mechanism 5. The second cylinder 7 is located below the adjusting mechanism 6. The support mechanism 1 includes a rectangular groove 11, a rectangular baffle 12, a U-shaped support frame 13, and a sliding groove 14. A circular hole is provided in the middle of the rear end of the rectangular groove 11. A rectangular baffle 12 is fixedly installed at the upper front end of the rectangular groove 11. A U-shaped support frame 13 is provided in front of the rectangular groove 11. Sliding grooves 14 are provided on both the left and right sides of the U-shaped support frame 13. A scale line is provided on the upper end face of the left side wall of the U-shaped support frame 13. A clearance hole is provided on the horizontal section of the U-shaped support frame 13, and a through clearance groove is provided on the two sliding grooves 14.

[0031] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 The fixing mechanism 2 includes a fixing plate 21, a suspension nail 22, a fixing unit 23, a fixing wedge 24, and a first cylinder 25. The fixing plate 21 is slidably disposed in the rectangular groove 11. The suspension nail 22 is fixedly disposed at the upper middle part of the front side of the fixing plate 21. The fixing unit 23 is disposed at each of the four corners of the fixing plate 21. The fixing wedge 24 is fixedly disposed at the lower middle part of the rear side of the fixing plate 21. The rear side of the fixing wedge 24 is fixedly connected to the telescopic end of the first cylinder 25. The first cylinder 25 is fixedly disposed in the round hole at the middle of the rear end of the rectangular groove 11.

[0032] Please see Figure 3 and Figure 4 The fixing unit 23 includes cylindrical rods 231 and fixing blocks 232. The four cylindrical rods 231 are fixedly installed at the four corners of the fixing plate 21. The fixing blocks 232 are rotatably installed on each of the four cylindrical rods 231. The rear side of the fixing block 232 is convex, and the distance from the convex side of the fixing block 232 to the front side of the fixing plate 21 is less than the thickness of the alphabet.

[0033] In practice, first, place the fixing plate 21 near the rear end of the rectangular groove 11, then hook the hanging holes on the alphabet onto the hanging nails 22, manually rotate the four fixing blocks 232 to clamp the alphabet onto the fixing plate 21, start the first cylinder 25, the first cylinder 25 pushes the fixing plate 21 forward through the fixing wedge 24, when the front side of the fixing plate 21 touches the rectangular baffle 12, the first cylinder 25 stops working, and the fixing plate 21 is fixed and clamped by the rectangular baffle 12 and the fixing wedge 24.

[0034] Please see Figure 5 and Figure 9 The pressing mechanism 3 includes a rectangular rod 31, a T-shaped cylindrical rod 32, and a return spring 33. The left and right ends of the rectangular rod 31 are slidably disposed in two sliding grooves 14. Multiple stepped cylindrical holes are evenly opened along the length of the rectangular rod 31. The larger diameter end of the stepped cylindrical hole is close to the alphabet. The corresponding T-shaped cylindrical rod 32 is installed in the stepped cylindrical hole. The front end of the T-shaped cylindrical rod 32 is hemispherical. The return spring 33 is fixedly connected to the end face of the larger diameter end of the stepped cylindrical hole. The other end of the return spring 33 is fixedly connected to the front end face of the horizontal section of the T-shaped cylindrical rod 32, and the return spring 33 is sleeved on the vertical section of the T-shaped cylindrical rod 32.

[0035] In actual operation, the T-shaped cylindrical rod 32 is positioned directly opposite the alphabet key. When the T-shaped cylindrical rod 32 is pushed, its rear end will press the alphabet key. At this time, the first return spring 33 is stretched. After the pressing is finished, the T-shaped cylindrical rod 32 returns to its original position under the action of the first return spring 33.

[0036] Please see Figure 1 , Figure 5 and Figure 6The actuating mechanism 4 includes a second rectangular rod 41, a rack 42, an actuating rod 43, an L-shaped plate 44, a forward / reverse motor 45, a gear 46, a connecting block 47, a second return spring 48, and a U-shaped frame 49. The left and right ends of the second rectangular rod 41 are slidably disposed in two sliding grooves 14. A pointer is provided on the upper end face of the second rectangular rod 41 near the left side of the U-shaped support frame 13. The second rectangular rod 41 is located in front of the first rectangular rod 31. The second rectangular rod 41 is a hollow structure with open ends. Rectangular through slots communicating with its cavity are opened on the front and rear sides of the second rectangular rod 41. A rack 42 is slidably disposed in the rectangular through slots of the second rectangular rod 41. An actuating rod 43 is fixedly disposed on the rear side of the rack 42. The rear end of the actuating rod 43 is... For the hemispherical shape that abuts against the front end of the T-shaped cylindrical rod 32, an L-shaped plate 44 is fixedly installed in the middle of the lower side of the second rectangular rod 41. A forward and reverse motor 45 is fixedly installed on the horizontal section of the L-shaped plate 44. A gear 46 is fixedly installed on the output shaft of the forward and reverse motor 45. The gear 46 meshes with the rack 42. The second rectangular rod 41 and the first rectangular rod 31 are fixedly connected by two connecting blocks 47 near the left and right sides of the U-shaped support frame 13. A second return spring 48 is fixedly connected to the front side of each of the two slide grooves 14. The other end of the second return spring 48 is fixedly connected to the front side of the second rectangular rod 41. A U-shaped frame 49 is fixedly installed in the middle of the front side of the second rectangular rod 41, and the gear 46 is located in the middle of the U-shaped frame 49.

[0037] In practice, first, adjust the position of the lever 43 to the left of the leftmost T-shaped cylindrical rod 32. Start the forward and reverse motor 45, which drives the gear 46 to rotate clockwise. The gear 46 drives the rack 42 to move to the right, and the rack 42 drives the lever 43 to move to the right simultaneously. When the rear end of the lever 43 contacts the front end of the leftmost T-shaped cylindrical rod 32, the lever 43 will move the leftmost T-shaped cylindrical rod 32 to press the key on the alphabet. The lever 43 continues to move to the right. When the lever 43 stops moving the leftmost T-shaped cylindrical rod 32, the leftmost T-shaped cylindrical rod 32 returns to its original position under the action of the first return spring 33. Then, the lever 43... Begin by moving the next T-shaped cylindrical rod 32, and so on, until the lever 43 finishes moving the rightmost T-shaped cylindrical rod 32. At this point, the forward and reverse motor 45 rotates in the opposite direction, driving the gear 46 to rotate counterclockwise. The gear 46 drives the rack 42 to move to the left, and the rack 42 drives the lever 43 to move to the left. The lever 43 then moves sequentially from the rightmost T-shaped cylindrical rod 32 to the leftmost T-shaped cylindrical rod 32. By changing the speed of the forward and reverse motor 45, the speed at which the lever 43 moves left and right is changed, so that the multiple T-shaped cylindrical rods 32 are pressed at different speeds when pressing the keys on the alphabet, thus allowing the keys on the alphabet to be pressed at different speeds.

[0038] Please see Figure 1 and Figure 7 The extrusion mechanism 5 includes a support frame 51, an extrusion plate 52, a horizontal plate 53, a third return spring 54, a support platform 55, a drive motor 56, and a first eccentric wheel 57. The two ends of the support frame 51 are fixedly mounted on two connecting blocks 47. A rectangular hole penetrating both the upper and lower surfaces is provided on the support frame 51. The extrusion plate 52 is slidably mounted within the rectangular hole. The lower end of the extrusion plate 52 is an inclined surface that abuts against the front end of the T-shaped cylindrical rod 32. A horizontal plate 53 is fixedly mounted on the lower end of the front side of the extrusion plate 52. Multiple No. 3 return springs 54 are evenly arranged along the length of the plate 53. The lower ends of the multiple No. 3 return springs 54 are fixedly connected to the upper end face of the horizontal plate 53. The upper ends of the No. 3 return springs 54 are fixedly connected to the lower end face of the horizontal section of the support frame 51. The support platform 55 is fixedly set on the U-shaped frame 49. A drive motor 56 is fixedly set on the support platform 55. A No. 1 eccentric wheel 57 is fixedly set on the output shaft of the drive motor 56. The edge of the No. 1 eccentric wheel 57 slides against the upper end face of the extrusion plate 52.

[0039] In operation, the drive motor 56 is started, which drives the first eccentric wheel 57 to rotate. The first eccentric wheel 57 moves the extrusion plate 52 downward. The lower end of the inclined surface of the extrusion plate 52 simultaneously extrudes multiple T-shaped cylindrical rods 32, thereby pressing a row of keys on the alphabet. At the same time, the extrusion plate 52 stretches the third return spring 54 through the horizontal plate 53. When the extrusion force of the first eccentric wheel 57 on the extrusion plate 52 decreases, the extrusion plate 52 moves upward back to its original position under the action of the third return spring 54. The multiple T-shaped cylindrical rods 32 also return to their original position under the action of the first return spring 33, thus continuously pressing the keys on the alphabet.

[0040] Please see Figure 1 and Figure 8 The adjusting mechanism 6 includes a fixed shaft 61, a second eccentric wheel 62, a positioning plate 63, and a positioning pin 64. The fixed shaft 61 is fixedly installed on the U-shaped support frame 13. The second eccentric wheel 62 is rotatably installed on the fixed shaft 61. The second eccentric wheel 62 has multiple positioning holes circumferentially opened. The positioning plate 63 is fixedly installed on the fixed shaft 61, and the second eccentric wheel 62 is located above the positioning plate 63. The positioning plate 63 has limiting holes of the same size as the positioning holes on the second eccentric wheel 62 evenly opened from front to back. The positioning pin 64 is inserted from top to bottom into the positioning hole on the second eccentric wheel 62 and simultaneously into the limiting hole on the positioning plate 63.

[0041] Please see Figure 1 The telescopic end of cylinder 7 is fixedly connected to the lower end face of the U-shaped support frame 13.

[0042] In practice, the positioning pin 64 is removed from the positioning hole of the second eccentric wheel 62. The second eccentric wheel 62 is manually rotated. When the next positioning hole on the second eccentric wheel 62 aligns with the next limiting hole on the positioning plate 63, the positioning pin 64 is inserted into the positioning hole on the second eccentric wheel 62, simultaneously penetrating the limiting hole on the positioning plate 63. Due to the rotation of the second eccentric wheel 62, the second eccentric wheel 62 drives the pushing mechanism 5, the actuating mechanism 4, and the pressing mechanism 3 to move synchronously back and forth along the slide groove 14 through the U-shaped frame 49. At the same time, under the action of the second return spring 48, the distance between the T-shaped cylindrical rod 32 and the alphabet is adjusted. The pointer on the second rectangular rod 41 points to the scale line on the U-shaped support frame 13, indicating that the actuation mechanism is being adjusted. The moving distance of the moving mechanism 4 is repeated, and the working process of the toggle mechanism 4 and the squeezing mechanism 5 is repeated to press the keys on the alphabet with different forces. After the performance test of the first row of keys on the alphabet is completed, if the first row of keys passes the test, the second cylinder 7 is activated. The second cylinder 7 drives the pressing mechanism 3, the toggle mechanism 4, the squeezing mechanism 5 and the adjusting mechanism 6 to move downward synchronously through the U-shaped support frame 13. When the multiple T-shaped cylindrical rods 32 are facing the second row of keys on the alphabet, the second cylinder 7 stops working and repeats the working process of each mechanism. If the second row of keys passes the test, the second cylinder 7 is activated again to move downward and continue to repeat the working process until all the keys on the alphabet have been tested.

[0043] Working principle: S1. First, place the fixing plate 21 near the rear end of the rectangular groove 11, then hook the hanging hole on the alphabet onto the hanging nail 22. Manually rotate the four fixing blocks 232 to clamp the alphabet onto the fixing plate 21. Start the first cylinder 25. The first cylinder 25 pushes the fixing plate 21 forward through the fixing wedge 24. When the front side of the fixing plate 21 touches the rectangular baffle 12, the first cylinder 25 stops working. The fixing plate 21 is fixed and clamped by the rectangular baffle 12 and the fixing wedge 24.

[0044] S2. Position the multiple T-shaped cylindrical rods 32 directly opposite the first row of keys on the alphabet. Adjust the position of the lever 43 to the left of the leftmost T-shaped cylindrical rod 32. Start the forward and reverse motor 45, which drives the gear 46 to rotate. The gear 46 meshes with the rack 42, causing the lever 43 to move back and forth left and right. The lever 43 will sequentially move the multiple T-shaped cylindrical rods 32 to press the first row of keys on the alphabet back and forth left and right. By changing the speed of the forward and reverse motor 45, the speed at which the lever 43 moves left and right is changed, so that the multiple T-shaped cylindrical rods 32 press the first row of keys on the alphabet at different speeds.

[0045] S3. After the test of the resistance of the first row of keys on the alphabet to pressing at different speeds is completed, when the lever 43 is to the left of the leftmost T-shaped cylindrical rod 32, the forward and reverse motor 45 is stopped, and the drive motor 56 is started, which drives the first eccentric wheel 57 to rotate. Under the action of the first eccentric wheel 57 and the third return spring 54, the push plate 52 moves up and down reciprocally. The push plate 52 pushes multiple T-shaped cylindrical rods 32 to press the first row of keys on the alphabet synchronously, thereby testing the resistance of the first row of keys on the alphabet to multiple consecutive pressing.

[0046] S4. After the test of the resistance to repeated continuous pressing of the first row of keys on the alphabet is completed, remove the positioning pin 64 from the positioning hole of the second eccentric wheel 62, manually rotate the second eccentric wheel 62, and when the next positioning hole on the second eccentric wheel 62 is aligned with the next limiting hole on the positioning plate 63, insert the positioning pin 64 into the positioning hole on the second eccentric wheel 62, and simultaneously through the limiting hole on the positioning plate 63. When the second eccentric wheel 62 rotates, it drives the pushing mechanism 5, the tossing mechanism 4 and the pressing mechanism 3 to move synchronously back and forth along the slide groove 14 through the U-shaped frame 49. At the same time, the distance between the T-shaped cylindrical rod 32 and the alphabet is adjusted by the action of the second return spring 48. Repeat the working process of the tossing mechanism 4 and the pushing mechanism 5 to test the resistance to pressing of the first row of keys on the alphabet with different forces.

[0047] S5. After the performance tests of the first row of keys on the alphabet are completed and all tests are passed, start cylinder 7. Cylinder 7 drives the various mechanisms on the U-shaped support frame 13 to move downward synchronously through the U-shaped support frame 13. When the multiple T-shaped cylindrical rods 32 are aligned with the second row of keys on the alphabet, cylinder 7 stops working and repeats the working process of each mechanism. If the second row of keys passes the test, start cylinder 7 again to move downward and continue to repeat the working process until all keys on the alphabet are tested.

[0048] S6. After all the keys on the alphabet have been tested, remove the alphabet, replace it with the next alphabet to be tested, and repeat the above steps.

[0049] It should be noted that the number of presses can be set, such as several hundred times, to detect whether the surface of the alphabet is damaged, whether it still makes a sound, or whether the sound quality is damaged after pressing. Alternatively, you can press the alphabet an unlimited number of times until the surface of the alphabet is damaged, stops making a sound, or the sound quality is damaged, and record the maximum number of presses at this point.

[0050] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0051] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, an integral connection, or a sliding connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0052] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A device for testing the performance of English alphabet pronunciation, characterized in that: The performance testing device includes a support mechanism (1), a fixing mechanism (2), a pressing mechanism (3), a tossing mechanism (4), a pushing mechanism (5), an adjusting mechanism (6), and a second cylinder (7). The fixing mechanism (2) is located in the middle of the support mechanism (1). The pressing mechanism (3) is located in front of the fixing mechanism (2). The tossing mechanism (4) is located in front of the pressing mechanism (3). The pushing mechanism (5) is located above the pressing mechanism (3) and the tossing mechanism (4). The adjusting mechanism (6) is located in front of the pushing mechanism (5). The second cylinder (7) is located below the adjusting mechanism (6). The support mechanism (1) includes a rectangular groove (11), a rectangular baffle (12), a U-shaped support frame (13), and a sliding groove (14). A round hole is provided in the middle of the rear end of the rectangular groove (11). A rectangular baffle (12) is fixedly provided in the upper part of the front end of the rectangular groove (11). A U-shaped support frame (13) is provided in front of the rectangular groove (11). Sliding grooves (14) are provided on both the left and right sides of the U-shaped support frame (13). A scale line is provided on the upper end face of the left side wall of the U-shaped support frame (13). A clearance hole is provided on the horizontal section of the U-shaped support frame (13), and a through clearance groove is provided on the two sliding grooves (14). The fixing mechanism (2) includes a fixing plate (21), a hanging nail (22) and a fixing unit (23). The fixing plate (21) is slidably disposed in a rectangular groove (11). A hanging nail (22) is fixedly disposed on the upper middle part of the front side of the fixing plate (21). A fixing unit (23) is disposed at each of the four corners of the fixing plate (21). The pressing mechanism (3) includes a first rectangular rod (31), a T-shaped cylindrical rod (32) and a first return spring (33). The left and right ends of the first rectangular rod (31) are slidably disposed in two sliding grooves (14). Multiple stepped cylindrical holes are evenly opened along the length direction of the first rectangular rod (31). The larger diameter end of the stepped cylindrical hole is close to the alphabet. The corresponding T-shaped cylindrical rod (32) is installed in the stepped cylindrical hole. The front end of the T-shaped cylindrical rod (32) is hemispherical. The first return spring (33) is fixedly connected to the end face of the larger diameter end of the stepped cylindrical hole. The other end of the first return spring (33) is fixedly connected to the front end face of the horizontal section of the T-shaped cylindrical rod (32), and the first return spring (33) is sleeved on the vertical section of the T-shaped cylindrical rod (32). The actuating mechanism (4) includes a second rectangular rod (41), an actuating rod (43), a connecting block (47), a second return spring (48), and a U-shaped frame (49). The left and right ends of the second rectangular rod (41) are slidably disposed in two sliding grooves (14). A pointer is provided on the upper end face of the second rectangular rod (41) near the left side of the U-shaped support frame (13), and the second rectangular rod (41) is located in front of the first rectangular rod (31). The second rectangular rod (41) is a hollow structure with open ends, and rectangular through slots communicating with its hollow structure are provided on the front and rear sides of the second rectangular rod (41). A toggle rod (43) is slidably installed in the rectangular through groove of the rectangular rod (41). The rear end of the toggle rod (43) is a hemispherical shape that abuts against the front end of the T-shaped cylindrical rod (32). The second rectangular rod (41) and the first rectangular rod (31) are fixedly connected by two connecting blocks (47) near the left and right sides of the U-shaped support frame (13). The front sides of the two slides (14) are fixedly connected to the second return spring (48). The other end of the second return spring (48) is fixedly connected to the front side of the second rectangular rod (41). The U-shaped frame (49) is fixedly installed in the middle of the front side of the second rectangular rod (41). The extrusion mechanism (5) includes a support frame (51), an extrusion plate (52), a horizontal plate (53), and a No. 3 return spring (54). The two ends of the support frame (51) are fixedly mounted on two connecting blocks (47). A rectangular hole penetrating the upper and lower surfaces is provided on the support frame (51). The extrusion plate (52) is slidably mounted in the rectangular hole. The lower end of the extrusion plate (52) is an inclined surface that abuts against the front end of the T-shaped cylindrical rod (32). A horizontal plate (53) is fixedly mounted on the lower end of the front side of the extrusion plate (52). Multiple No. 3 return springs (54) are evenly arranged along the length of the horizontal plate (53). The lower ends of the multiple No. 3 return springs (54) are fixedly connected to the upper end surface of the horizontal plate (53). The upper end of the No. 3 return springs (54) is fixedly connected to the lower end surface of the horizontal section of the support frame (51).

2. The English alphabet pronunciation performance testing device according to claim 1, characterized in that: The fixing mechanism (2) also includes a fixing wedge (24) and a first cylinder (25). The fixing wedge (24) is fixedly installed on the lower middle part of the rear side of the fixing plate (21). The rear side of the fixing wedge (24) is fixedly connected to the telescopic end of the first cylinder (25). The first cylinder (25) is fixedly installed in the round hole in the middle of the rear end of the rectangular groove (11).

3. The English alphabet pronunciation performance testing device according to claim 1, characterized in that: The fixing unit (23) includes cylindrical rods (231) and fixing blocks (232). Four cylindrical rods (231) are fixedly installed at the four corners of the fixing plate (21). Fixing blocks (232) are rotatably installed on each of the four cylindrical rods (231). The rear side of the fixing block (232) is convex, and the distance from the convex side of the fixing block (232) to the front side of the fixing plate (21) is less than the thickness of the alphabet.

4. The English alphabet pronunciation performance testing device according to claim 1, characterized in that: The actuating mechanism (4) further includes a rack (42), an L-shaped plate (44), a forward and reverse motor (45), and a gear (46). The rack (42) is slidably arranged in the rectangular through groove of the second rectangular rod (41). The L-shaped plate (44) is fixedly arranged in the middle of the lower side of the second rectangular rod (41). The forward and reverse motor (45) is fixedly arranged on the horizontal section of the L-shaped plate (44). The gear (46) is fixedly arranged on the output shaft of the forward and reverse motor (45). The gear (46) meshes with the rack (42) and is located in the middle position of the U-shaped frame (49).

5. The English alphabet pronunciation performance testing device according to claim 1, characterized in that: The extrusion mechanism (5) further includes a support platform (55), a drive motor (56), and a first eccentric wheel (57). The support platform (55) is fixedly mounted on the U-shaped frame (49). The drive motor (56) is fixedly mounted on the support platform (55). The first eccentric wheel (57) is fixedly mounted on the output shaft of the drive motor (56). The edge of the first eccentric wheel (57) slides against the upper surface of the extrusion plate (52).

6. The English alphabet pronunciation performance testing device according to claim 1, characterized in that: The adjustment mechanism (6) includes a fixed shaft (61), a second eccentric wheel (62), a positioning plate (63), and a positioning pin (64). The fixed shaft (61) is fixedly installed on the U-shaped support frame (13). The second eccentric wheel (62) is rotatably installed on the fixed shaft (61). The second eccentric wheel (62) has multiple positioning holes circumferentially opened. The positioning plate (63) is fixedly installed on the fixed shaft (61), and the second eccentric wheel (62) is located above the positioning plate (63). The positioning plate (63) has limit holes of the same size as the positioning holes on the second eccentric wheel (62) evenly opened from front to back. The positioning pin (64) is inserted from top to bottom into the positioning hole on the second eccentric wheel (62) and simultaneously into the limit hole on the positioning plate (63).

7. The English alphabet pronunciation performance testing device according to claim 1, characterized in that: The telescopic end of the second cylinder (7) is fixedly connected to the lower end face of the U-shaped support frame (13).

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