A point measurement mechanism of an LED spectrometer

Abstract

The utility model discloses a kind of point measurement mechanism of LED spectrometer, it is related to spectrometer technical field, including the base of hollow structure and the turntable that is horizontally rotated in the top of base, motor is equipped in the inside center of base and drives turntable rotation, coaxially fixed with column in the top of turntable, coaxially fixed with fixed ring in the outer arc wall top end of column, multiple support rods about its axial annular array distribution are vertically rotatably connected on the outer side wall of fixed ring, and the end of support rod away from fixed ring is rotatably connected with horizontal fixed plate;In the utility model, by limiting mechanism, cooperate enough big detection groove of size setting in reasonable range, reach the purpose that multiple different size LED can be tested without replacing component, expand the application range of equipment, and avoid the shutdown caused by manual replacement component, limiting mechanism can further ensure that probe and pin stable contact, reduce structural damage and other problems.

Description

Technical Field

[0001] This utility model relates to the field of spectrometer technology, specifically to a point measurement mechanism for an LED spectrometer. Background Technology

[0002] An LED sorting machine is a device used to sort light-emitting diodes (LEDs) based on their optical and electrical properties. Its core function is to measure key parameters of LEDs in real time, such as brightness, wavelength, color temperature, voltage, and current, using a precision optical detection system (such as a spectrometer and photometer) and an electrical testing module. Based on preset grading standards, it automatically classifies LEDs into different grade bins. This process is of great significance for ensuring the consistency of LED product quality and improving production efficiency, and it is widely used in LED manufacturing fields such as lighting, display, and backlighting.

[0003] The spot testing mechanism is the core functional unit of the LED spectrometer, responsible for the precise positioning, fixing, testing and sorting of LEDs. The spot testing mechanism of some existing LED spectrometers can only test LEDs of a specific size. If it is necessary to test LEDs of other sizes, the corresponding parts need to be replaced manually, which is cumbersome and prone to errors, and is inconvenient. In view of this, this application is hereby submitted. Utility Model Content

[0004] In order to solve the technical problems existing in the prior art, the present invention provides a point measurement mechanism for an LED spectrometer.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a point measurement mechanism for an LED spectrometer, comprising a hollow base and a turntable that rotates horizontally on top of the base. A motor that drives the turntable to rotate is located at the center of the base. A column is coaxially fixed to the top of the turntable. A fixing ring is coaxially fixed to the top of the outer arc wall of the column. Multiple support rods arranged in a circular array about its axial direction are vertically rotatably connected to the outer wall of the fixing ring. A horizontal fixing plate is rotatably connected to the end of the support rod away from the fixing ring. Detection grooves are provided at the outer edge of the top of the turntable corresponding to the positions of the multiple fixing plates. The detection grooves do not communicate with the interior of the base. The detection groove extends in the same direction as the turntable radially, and the end of the detection groove away from the turntable axis passes through the turntable. The detection equipment and power supply probe are integrated on the side wall of the fixed plate near the turntable. Vertical spring telescopic rods are fixed at the four corners of the bottom of the fixed plate and connected to the turntable. A limiting mechanism is provided at the bottom of the fixed plate away from the turntable axis, and a feeding mechanism is provided at the bottom of the fixed plate near the turntable axis.

[0006] Preferably, a storage slot 1 is provided at the top of the turntable corresponding to the position of the spring telescopic rod. The storage slot 1 is not interconnected with the detection slot and the interior of the base. A sealing block is fixed at the center of the bottom of the fixed plate away from the axis of the turntable. When the bottom of the fixed plate abuts against the top of the turntable, the sealing block is inserted into the detection slot and completely seals the detection slot. A wedge block is fixed at the top of the fixed plate away from the axis of the turntable. The length direction of the wedge block is parallel to the circumferential tangent of the turntable. The detection slot has a sliding channel that runs horizontally through the circumferential tangent of the turntable and is interconnected with the storage slot 1 on the two inner walls of the turntable that are opposite each other along the circumferential direction of the turntable. The limiting mechanism includes a rack rod 1 vertically fixed to the top of the spring telescopic rod. A connecting gear is engaged at the bottom end of the rack rod 1 near the detection slot. A horizontal rack rod 2 is engaged at the bottom end of the connecting gear. The connecting gear rotates on the inner wall of the sliding channel and the rack rod 2 slides on the bottom inner wall of the sliding channel. The rack rod 1 and the rack rod 2 are not located in the same vertical plane.

[0007] Preferably, a damping rod is fixed to one end of the rack rod near the detection slot. Pull rods are rotatably connected to opposite sides of the outer arc wall of the damping rod along the vertical direction. Vertically rotatably connected limit plates are located at both ends of the damping rod near the detection slot and the pull rods away from the damping rod. Multiple limit plates are located in the same vertical plane, and adjacent limit plates are rotatably connected to each other. A flexible anti-static material is laid on the side wall of the limit plates away from the rack rod. A vertically rotatably fixed rod is fixed at the center of the bottom of the fixed plate near the turntable axis. The feeding mechanism includes a bevel gear rotatably connected to the end of the fixed rod away from the fixed plate. The axial direction of the bevel gear is consistent with the radial direction of the turntable. A broken annular gear is fixed to the inner wall of the bottom of the base. The extension lines of the inner and outer arc walls at both ends of the broken annular gear can form a complete ring, and multiple sets of meshing teeth are spaced apart on the top of the broken annular gear. The bevel gear can mesh with the meshing teeth on the broken annular gear.

[0008] Preferably, the end of the bevel gear away from the turntable axis is coaxially fixed to a crankshaft, the end of the crankshaft away from the bevel gear rotates to the end of a fixed rod, a piston rod is rotatably sleeved on the outer arc wall of the crankshaft, the piston rod is vertically upward and a piston cylinder is slidably sleeved on the outside of the piston rod, a one-way air inlet valve is provided on the outer arc wall of the piston cylinder, an air storage pipe is fixed at the top of the piston cylinder, a one-way valve is provided at the connection between the piston cylinder and the air storage pipe, a conveying pipe is fixed on both sides of the outer arc wall along the circumference of the turntable, the two conveying pipes are respectively fixed with the same nozzle at the end away from the piston cylinder, a solenoid valve is provided in the nozzle, the nozzle is set on the side wall of the fixed rod away from the turntable axis and the axial direction of the nozzle is consistent with the radial direction of the turntable, the nozzle is coaxially set with the detection groove, a through hole is opened on the side wall of the detection groove near the turntable axis, the through hole is coaxial with the nozzle.

[0009] Preferably, a second limiting ring is fixed at the top of the base. The second limiting ring is located above the turntable. The second limiting ring is coaxial with the incomplete annular toothed disc and is located in the same vertical plane. The central angle corresponding to the inner arc wall of the second limiting ring is equal to the central angle corresponding to the inner arc wall of the incomplete annular toothed disc. The two ends of the bottom of the second limiting ring along its extension direction are not inclined, and the wedge block slides against the second limiting ring. A feeding device is provided on one side of the base. The inner wall of the bottom of the feeding device is at the same horizontal height as the inner wall of the bottom of the detection groove. Multiple feeding pipes are provided on the top side of the base away from the second limiting ring. The axial direction of the feeding pipes is consistent with the radial direction of the turntable, and the feeding pipes are aligned with the detection groove.

[0010] Compared with the prior art, the present invention provides a spot measurement mechanism for an LED spectrometer, which has the following advantages: (1) This application uses a limiting mechanism and a detection slot with a size set within a reasonable range to achieve the purpose of testing various LEDs of different sizes without replacing parts, thereby expanding the applicability of the equipment and avoiding downtime caused by manual replacement of parts. At the same time, the limiting mechanism can further ensure stable contact between the probe and the pin, reducing structural damage and other problems.

[0011] (2) This application uses a feeding mechanism to mesh a bevel gear with a defective ring gear plate while rotating for testing, driving the crankshaft and piston cylinder to move and collect gas. After the test is completed, a high-pressure airflow is sprayed through a nozzle to achieve the dual functions of LED feeding and auxiliary probe cooling, reducing a series of problems caused by overheating of the probe during long-term operation, and requiring no external energy, thus enhancing practicality. Attached Figure Description

[0012] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the point measurement mechanism of an LED spectrometer from one side view. Figure 2 This is a schematic diagram of the overall structure of the point measurement mechanism of an LED spectrometer from another perspective. Figure 3 This diagram illustrates the positional relationship between the fixed plate and the annular gear disk in the point measurement mechanism of an LED spectrometer. Figure 1 ; Figure 4 This is a schematic diagram of the limiting mechanism in the point measurement mechanism of an LED spectrometer; Figure 5 This diagram illustrates the positional relationship between the fixed plate and the annular gear disk in the point measurement mechanism of an LED spectrometer. Figure 2 ; Figure 6This is a schematic diagram of the feeding mechanism in the spot measurement mechanism of an LED spectrometer.

[0013] In the picture: 10. Base; 101. Feeding device; 11. Turntable; 111. Detection slot; 112. Discharge pipe; 12. Fixing ring; 13. Support rod; 14. Fixing plate; 141. Sealing block; 142. Spring telescopic rod; 143. Wedge block; 144. Fixing rod; 15. Limiting ring II; 20. Rack rod one; 21. Connecting gear; 22. Rack rod two; 23. Damping rod; 24. Limiting plate; 25. Tie rod; 30. Bevel gear; 31. Damaged annular gear disc; 32. Crankshaft; 33. Piston cylinder; 34. Nozzle. Detailed Implementation

[0014] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0015] Please see the appendix Figure 1 To be continued Figure 6 This embodiment proposes a point measurement mechanism for an LED spectrometer: it includes a hollow base 10 and a turntable 11 that rotates horizontally on the top of the base 10. A motor that drives the turntable 11 to rotate is provided at the center of the base 10. A column is coaxially fixed to the top of the turntable 11. A fixing ring 12 is coaxially fixed to the top of the outer arc wall of the column. Multiple support rods 13 are vertically rotatably connected to the outer wall of the fixing ring 12 and are arranged in a ring array about its axis. A horizontal fixing plate 14 is rotatably connected to the end of the support rod 13 away from the fixing ring 12. Detection grooves 111 are opened at the outer edge of the top of the turntable 11 at the positions of the multiple fixing plates 14. The detection grooves 111 do not communicate with the interior of the base 10. The detection groove 111 extends in the same direction as the turntable 11 radially, and the end of the detection groove 111 away from the axis of the turntable 11 passes through the turntable 11. The detection equipment and power supply probe are integrated on the side wall of the fixing plate 14 near the turntable 11. Vertical spring telescopic rods 142 are fixed at the four corners of the bottom of the fixing plate 14 and connected to the turntable 11. A limiting mechanism is provided at the bottom end of the fixing plate 14 away from the axis of the turntable 11, and a feeding mechanism is provided at the bottom end of the fixing plate 14 near the axis of the turntable 11. A storage slot is provided at the top of the turntable 11 corresponding to the position of the spring telescopic rod 142. The storage slot is not interconnected with the detection slot 111 and the interior of the base 10. A sealing block 141 is fixed at the center of the bottom of the fixing plate 14 away from the axis of the turntable 11. When the bottom of the fixing plate 14 abuts against the top of the turntable 11, the sealing block 141 is inserted into the detection slot 111 and completely seals the detection slot 111. A wedge block 143 is fixed at the top of the fixing plate 14 away from the axis of the turntable 11. The length direction of the wedge block 143 is parallel to the circumferential tangent of the turntable 11. The detection groove 111 has two inner walls facing each other around the turntable 11, with a sliding channel that runs horizontally through the tangential direction of the turntable 11 at one end near the axis of the turntable 11. The sliding channel is connected to the first storage groove. The limiting mechanism includes a rack rod 20 that is vertically fixed to the top of the spring telescopic rod 142. A connecting gear 21 is engaged at the bottom of the rack rod 20 near the detection groove 111. A horizontal rack rod 22 is engaged at the bottom of the connecting gear 21. The connecting gear 21 rotates on the inner wall of the sliding channel and the rack rod 22 slides on the bottom inner wall of the sliding channel. The rack rod 20 and the rack rod 22 are not located in the same vertical plane. A damping rod 23 is fixed to one end of the rack 22 near the detection groove 111. A pull rod 25 is rotatably connected to both sides of the outer arc wall of the damping rod 23 along the vertical direction. A vertically set limiting plate 24 is vertically rotatably connected to the end of the damping rod 23 near the detection groove 111 and the end of the pull rod 25 away from the damping rod 23. Multiple limiting plates 24 are located in the same vertical plane and adjacent limiting plates 24 are rotatably connected to each other. The side wall of the limiting plate 24 away from the rack 22 is covered with a flexible material that can prevent static electricity.

[0016] It should be noted that the feeding device 101 is used to transport the LEDs to be tested after being fed by the vibratory plate into the testing tank 111. Since the bottom inner wall of the feeding device 101 and the bottom inner wall of the testing tank 111 are at the same level, the LEDs can enter the testing tank 111 smoothly. There are no restrictions on the feeding device 101 here. The motor drives the turntable 11 to rotate, which in turn drives the detection slot 111 to rotate. The rotary feeding and detection efficiency is higher. When the fixed plate 14 moves to the limit ring 15, the wedge block 143 abuts against the limit ring 15, forcing the fixed plate 14 to descend. When the top of the wedge block 143 slides against the top of the limit ring 15, the fixed plate 14 and the turntable 11 are completely in contact, and the sealing block 141 has been inserted and seals the detection slot 111. The sealing block 141 is used to prevent external light from entering and affecting the detection. During this period, the spring telescopic rod 142 adaptively retracts to store energy so that the fixed plate 14 can be driven to reset later. The rack rod 20 is fixed to the top of the spring telescopic rod 142, i.e., the telescopic end of the spring telescopic rod 142. When the spring telescopic rod 142 retracts, the rack rod 20 descends accordingly. The meshing connecting gear 21 rotates and then meshes with the rack rod 22 to slide in the sliding channel. The rack rod 22 drives the damping rod 23 to move. Here, the axial length of the connecting gear 21 is greater than the sum of the widths of the rack rod 20 and the rack rod 22. Understandably, for medium to large-sized LEDs, the limiting plate 24 set on the damping rod 23 will first come into contact with the LED during the test, thereby forcing the damping rod 23 to retract. Under the action of the pull rod 25, it will push the limiting plates 24 on both sides towards the LED. The anti-static flexible material on the limiting plate 24 will contact the LED to limit the LED and prevent it from moving during the test. For small LEDs, the limiting plate 24 at the bottom is sufficient to provide the limit. The fixed plate 14 has a detection device and a power supply probe (not shown in the figure) integrated on the side wall near the turntable 11. When the LED is limited, the detection device supplies power to the LED through the power supply probe and detects various parameters of the LED. Specifically, the connection line is laid in the support rod 13. The top of the column is the junction point of the line and is equipped with a processor to process the data. Based on the collected data, the opening and closing timing of the solenoid valve at the detection slot 111 after the detection is completed is controlled.

[0017] A vertically arranged fixing rod 144 is fixed at the center of one end of the bottom of the fixing plate 14 near the axis of the turntable 11. The feeding mechanism includes a bevel gear 30 rotatably connected to the end of the fixing rod 144 away from the fixing plate 14. The axial direction of the bevel gear 30 is consistent with the radial direction of the turntable 11. A broken annular toothed disc 31 is fixed on the inner wall of the bottom of the base 10. The extension lines of the inner and outer arc walls at both ends of the broken annular toothed disc 31 can form a complete ring. The top of the broken annular toothed disc 31 is provided with multiple sets of meshing teeth at intervals. The bevel gear 30 can mesh with the meshing teeth on the broken annular toothed disc 31. A crankshaft 32 is coaxially fixed at one end of the bevel gear 30 away from the axis of the turntable 11. The crankshaft 32 is rotated at the end of the fixed rod 144 at one end of the bevel gear 30. A piston rod is rotatably sleeved on the outer arc wall of the crankshaft 32. The piston rod is vertically upward and a piston cylinder 33 is slidably sleeved on the outer side of the piston rod. A one-way air intake valve is provided on the outer arc wall of the piston cylinder 33. A gas storage pipe is fixed at the top of the piston cylinder 33. A one-way valve is provided at the connection between the piston cylinder 33 and the gas storage pipe. Conveying pipes are fixed on both sides of the outer arc wall along the circumference of the turntable 11. The same nozzle 34 is fixed at the end of the two conveying pipes away from the piston cylinder 33. A solenoid valve is provided inside the nozzle 34. The nozzle 34 is set on the side wall of the fixed rod 144 away from the axis of the turntable 11, and the axial direction of the nozzle 34 is consistent with the radial direction of the turntable 11. The nozzle 34 is coaxially arranged with the detection groove 111. A through hole is opened on the side wall of the detection groove 111 near the axis of the turntable 11. The through hole is coaxial with the nozzle 34. A limiting ring 15 is fixed to the top of the base 10. The limiting ring 15 is located above the turntable 11. The limiting ring 15 is coaxial with the incomplete annular toothed disc 31 and is located in the same vertical plane. The central angle corresponding to the inner arc wall of the limiting ring 15 is equal to the central angle corresponding to the inner arc wall of the incomplete annular toothed disc 31. The two ends of the bottom of the limiting ring 15 along its extension direction are not inclined, and the wedge block 143 slides against the limiting ring 15. A feeding device 101 is provided on one side of the base 10. The inner wall of the bottom of the feeding device 101 is at the same horizontal height as the inner wall of the bottom of the detection groove 111. Multiple feeding pipes 112 are provided on the top side of the base 10 away from the limiting ring 15. The axial direction of the feeding pipes 112 is consistent with the radial direction of the turntable 11, and the feeding pipes 112 are aligned with the detection groove 111.

[0018] It should be noted that as the turntable 11 continues to rotate, when the wedge block 143 slides against the limiting ring 15, the wedge block 143 is squeezed by the inclined surface at the bottom of the limiting ring 15 as the turntable 11 rotates, causing the fixing plate 14 to descend, which in turn causes the fixing rod 144 to descend. At this time, the bevel gear 30 and the broken ring gear 31 can mesh with each other. Furthermore, a vertical through slot is provided at the center of the side of the detection groove 111 near the axis of the turntable 11. The through slot allows all components of the feeding mechanism to slide freely vertically, and the through slot... The groove and the base 10 are connected internally and are connected to the detection groove 111 through the through hole. The meshing of the bevel gear 30 and the broken ring gear 31 causes the bevel gear 30 to rotate. The bevel gear 30 drives the crankshaft 32 to rotate. The crankshaft 32 drives the piston rod to reciprocate in the piston cylinder 33. When the piston rod pushes the gas in the piston cylinder 33 into the gas storage pipe and resets, the gas pressure in the piston cylinder 33 is less than the external gas pressure. At this time, the external air enters the piston cylinder 33 through the one-way air inlet valve on the outer arc wall of the piston cylinder 33 and is used for the next gas injection. When material needs to be unloaded, the wedge block 143 has disengaged from the limiting ring 15 and is no longer compressed. Therefore, all components, including the limiting mechanism, are reset. The opening and closing timing of the solenoid valve is controlled according to the detection results. The air in the storage pipe enters the nozzle 34 through the delivery pipe and is then ejected from the nozzle 34 to form an airflow. The airflow passes through the through hole on the side wall of the detection groove 111 near the axis of the turntable 11 and blows the LEDs that have been detected out of the detection groove 111. When the wedge block 143 no longer slides against the limiting ring 15, the fixing plate 14 is reset under the action of the spring telescopic rod 142. At the same time, it drives the rack rod 20 to move in the opposite direction, causing the limiting mechanism to reset. The departure of the sealing block 141 makes the detection groove 111 open again. As the turntable 11 continues to rotate, the above feeding, limiting, detection, and unloading processes are repeated to achieve continuous cyclic beam splitting detection of LEDs.

[0019] Working principle: The motor drives the turntable 11 to rotate, and the feeding device 101 feeds the LED to be tested into the detection slot 111. When the fixed plate 14 moves to the limit ring 15, the wedge block 143 abuts against the limit ring 15, causing the fixed plate 14 to descend. The sealing block 141 is inserted into the detection slot 111 to seal and prevent light. At the same time, the spring telescopic rod 142 retracts, and the rack rod 20 descends, driving the connecting gear 21 and the rack rod 22 to limit the LED with the limit plate 24. The detection device supplies power to the LED for detection through the power supply probe. Turntable 11 continues to rotate, bevel gear 30 meshes with the damaged annular gear disc 31 and rotates, driving crankshaft 32 to make piston rod reciprocate in piston cylinder 33. Air enters piston cylinder 33 through one-way intake valve and is stored in air storage pipe. According to the detection result, control solenoid valve, and air in air storage pipe is sprayed out through nozzle 34. The airflow blows the tested LED out of detection slot 111, completing the unloading. Turntable 11 continues to rotate to achieve continuous cyclic detection.

[0020] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A spot measurement mechanism for an LED spectrometer, comprising a hollow base (10) and a turntable (11) that rotates horizontally on top of the base (10), wherein a motor for driving the turntable (11) to rotate is provided at the center of the base (10), a column is coaxially fixed to the top of the turntable (11), and a fixing ring (12) is coaxially fixed to the top of the outer arc wall of the column, characterized in that: The outer wall of the fixed ring (12) is vertically rotatably connected to a plurality of support rods (13) arranged in a ring array about its axis. The end of the support rod (13) away from the fixed ring (12) is rotatably connected to a horizontal fixed plate (14). At the top outer edge of the turntable (11), a detection groove (111) is provided at the position corresponding to the plurality of fixed plates (14). The detection groove (111) is not interconnected with the interior of the base (10). The detection groove (111) extends in the same direction as the turntable (11) radially, and the end of the detection groove (111) away from the axis of the turntable (11) passes through the turntable (11). The detection equipment and power supply probe are integrated on the side wall of the fixing plate (14) near the turntable (11). Vertical spring telescopic rods (142) are fixed at the four corners of the bottom of the fixing plate (14) and connected to the turntable (11). A limiting mechanism is provided at the bottom of the fixing plate (14) away from the axis of the turntable (11), and a feeding mechanism is provided at the bottom of the fixing plate (14) near the axis of the turntable (11).

2. The point measurement mechanism of an LED spectrometer as described in claim 1, characterized in that: The top of the turntable (11) is provided with a storage slot at the position corresponding to the spring telescopic rod (142). The storage slot is not interconnected with the detection slot (111) and the base (10). A sealing block (141) is fixed at the center of the bottom of the fixing plate (14) away from the axis of the turntable (11). When the bottom of the fixing plate (14) abuts against the top of the turntable (11), the sealing block (141) is inserted into the detection slot (111) and completely seals the detection slot (111). A wedge block (143) is fixed at the top of the fixing plate (14) away from the axis of the turntable (11). The length direction of the wedge block (143) is parallel to the circumferential tangent of the turntable (11).

3. The point measurement mechanism of an LED spectrometer as described in claim 1, characterized in that: The detection groove (111) has a sliding channel that runs horizontally through the tangential direction of the turntable (11) on the two inner walls opposite to each other along the circumference of the turntable (11). The channel is connected to the first storage groove. The limiting mechanism includes a rack rod (20) that is vertically fixed to the top of the spring telescopic rod (142). A connecting gear (21) is engaged at the bottom of the rack rod (20) near the detection groove (111). A horizontal rack rod (22) is engaged at the bottom of the connecting gear (21). The connecting gear (21) rotates on the inner wall of the sliding channel and the rack rod (22) slides on the bottom inner wall of the sliding channel. The rack rod (20) and the rack rod (22) are not in the same vertical plane.

4. The point measurement mechanism of an LED spectrometer as described in claim 3, characterized in that: A damping rod (23) is fixed at one end of the rack rod (22) near the detection groove (111). A pull rod (25) is rotatably connected to both sides of the outer arc wall of the damping rod (23) along the vertical direction. A vertically arranged limiting plate (24) is vertically rotatably connected to the end of the damping rod (23) near the detection groove (111) and the end of the pull rod (25) away from the damping rod (23). Multiple limiting plates (24) are located in the same vertical plane and two adjacent limiting plates (24) are rotatably connected to each other. A flexible material that can prevent static electricity is laid on the side wall of the limiting plate (24) away from the rack rod (22).

5. The point measurement mechanism of an LED spectrometer as described in claim 1, characterized in that: A vertically arranged fixing rod (144) is fixed at the center of one end of the bottom of the fixing plate (14) near the axis of the turntable (11). The feeding mechanism includes a bevel gear (30) rotatably connected to the end of the fixing rod (144) away from the fixing plate (14). The axial direction of the bevel gear (30) is consistent with the radial direction of the turntable (11). A broken annular toothed disc (31) is fixed on the inner wall of the bottom of the base (10). The extension lines of the inner and outer arc walls at both ends of the broken annular toothed disc (31) can form a complete ring. The top of the broken annular toothed disc (31) is provided with multiple sets of meshing teeth at intervals. The bevel gear (30) can mesh with the meshing teeth on the broken annular toothed disc (31).

6. The point measurement mechanism of an LED spectrometer as described in claim 5, characterized in that: The bevel gear (30) is coaxially fixed to a crankshaft (32) at one end away from the axis of the turntable (11). The crankshaft (32) rotates at the end of the fixed rod (144) at the other end away from the bevel gear (30). A piston rod is rotatably sleeved on the outer arc wall of the crankshaft (32). The piston rod is vertically upward and a piston cylinder (33) is slidably sleeved on the outside of the piston rod. A one-way air intake valve is provided on the outer arc wall of the piston cylinder (33).

7. The point measurement mechanism of an LED spectrometer as described in claim 6, characterized in that: The piston cylinder (33) is fixed with an air storage pipe at the top. A one-way valve is provided at the connection between the piston cylinder (33) and the air storage pipe. Both sides of the outer arc wall along the circumference of the turntable (11) are fixed with a delivery pipe. The two delivery pipes are fixed with the same nozzle (34) at the ends away from the piston cylinder (33). A solenoid valve is provided inside the nozzle (34). The nozzle (34) is set on the side wall away from the axis of the turntable (11) of the fixed rod (144), and the axial direction of the nozzle (34) is consistent with the radial direction of the turntable (11). The nozzle (34) is coaxially set with the detection groove (111). A through hole is opened on the side wall of the detection groove (111) near the axis of the turntable (11), and the through hole is coaxial with the nozzle (34).

8. The point measurement mechanism of an LED spectrometer as described in claim 1, characterized in that: The base (10) is fixed with a limiting ring 2 (15) at the top. The limiting ring 2 (15) is located above the turntable (11). The limiting ring 2 (15) is coaxial with the broken annular toothed disc (31) and is located in the same vertical plane. The central angle corresponding to the inner arc wall of the limiting ring 2 (15) is equal to the central angle corresponding to the inner arc wall of the broken annular toothed disc (31). The two ends of the bottom of the limiting ring 2 (15) along its extension direction are not inclined and the wedge block (143) slides against the limiting ring 2 (15). A feeding device (101) is provided on one side of the base (10). The inner wall of the bottom of the feeding device (101) is at the same horizontal height as the inner wall of the bottom of the detection groove (111). Multiple feeding pipes (112) are provided on the side of the top of the base (10) away from the limiting ring 2 (15). The axial direction of the feeding pipes (112) is consistent with the radial direction of the turntable (11) and the feeding pipes (112) are aligned with the detection groove (111).

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