Polarized light interference experiment device

Abstract

The utility model discloses a polarized light interference experiment device, and relates to the technical field of polarized light experiments. Two longitudinal sliding rails are inserted between the two transverse sliding rails, and a plurality of quick assembly type experiment frame components are respectively mounted on the transverse sliding rails and the longitudinal sliding rails; according to the utility model, rapid assembly of the experiment rack is realized through the transverse slide rails and the longitudinal slide rails, and the experiment rack is rapid and stable in assembly and can be matched with movement and positioning of a rapid assembly type experiment rack assembly; the rapid assembling frame of the rapid assembling type experiment frame assembly is adopted to be rapidly installed on an experiment frame, meanwhile, the rapid assembling frame can be disassembled and installed at any time, and meanwhile, the rapid assembling frame can be moved and positioned on the experiment frame; the telescopic adjusting rod is adopted to adjust the height of the experimental apparatus, so that the experimental apparatus is on the same horizontal line; an angle adjuster is adopted to quickly adjust the angle; and the clamping mechanism is adopted to realize clamping installation of the experimental apparatus, and meanwhile, quick disassembly can be realized, and the stability is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of polarized light experiments, and in particular relates to a polarized light interference experimental device. Background Art

[0002] Polarized light interference refers to the interference of polarized light components with the same frequency, fixed phase difference, and the same direction. Polarized light interference has been widely used in many fields such as precision measurement, astronomical observation, photoelastic technology, automatic control in optical precision processing, etc., and is of great significance in scientific research and technological applications. Polarized light interference can be divided into parallel plane polarized light interference and converging plane polarized light interference.

[0003] However, the existing polarized light interference experimental device has the following problems when used:

[0004] 1. When installing experimental equipment, it is necessary to install them in sequence. When installing interference equipment between two equipment, all the equipment behind needs to be dismantled before installing the interference equipment, which makes the installation time-consuming and laborious.

[0005] 2. The installation equipment is easy to assemble and adjust quickly, resulting in low accuracy during adjustment and requiring multiple adjustments. Utility Model Content

[0006] In order to solve the problems mentioned in the above background technology, the purpose of the utility model is to provide a polarized light interference experimental device.

[0007] The utility model discloses a polarized light interference experimental device, which comprises a transverse slide rail, a longitudinal slide rail and a fast-assembly type experimental frame component; two longitudinal slide rails are inserted between the two transverse slide rails, and a plurality of fast-assembly type experimental frame components are respectively installed on the transverse slide rail and the longitudinal slide rail.

[0008] Preferably, a concave T-shaped sliding groove is provided in the middle of the upper end surface of the transverse slide rail and the longitudinal slide rail, and concave positioning grooves are provided on both sides of the upper end surface of the transverse slide rail and the longitudinal slide rail.

[0009] Preferably, T-shaped connecting grooves are provided on both side walls of the transverse slide rail, and T-shaped connecting blocks are installed at both ends of the longitudinal slide rail, and the T-shaped connecting blocks are inserted into the connecting grooves.

[0010] Preferably, one end of the T-shaped connecting block is integrally connected with a locking plate, which extends outside the width edge of the longitudinal slide rail. A locking threaded hole is provided in the middle of the locking plate, and a locking bolt is installed on the locking threaded hole.

[0011] Preferably, the rapid assembly experimental frame assembly comprises a rapid assembly frame, a telescopic adjustment rod, an angle adjuster, and a clamping mechanism; the upper end of the rapid assembly frame is equipped with a telescopic adjustment rod, the upper end of the telescopic adjustment rod is equipped with an angle adjuster, and the upper end of the angle adjuster is equipped with a clamping mechanism.

[0012] Preferably, the quick assembly frame includes a sliding block, a sliding upright, a positioning block, a return spring, and an upper mounting plate; a sliding upright is installed in the middle of the upper end surface of the sliding block, the positioning block is movably connected to the sliding upright, the upper end of the sliding upright is installed with an upper mounting plate, the upper side of the sliding upright is sleeved with a return spring, and the return spring is arranged between the positioning block and the upper mounting plate.

[0013] Preferably, protruding positioning parts are provided at both ends of the positioning block, anti-skid pads are installed at the bottom of the positioning parts, and anti-skid grooves are provided on both sides of the bottom of the positioning block.

[0014] Preferably, the telescopic adjustment rod includes a lower mounting plate, an outer tube body, an inner rod body, and a fixing bolt; the outer tube body is installed in the middle of the upper end of the lower mounting plate, the inner rod body is movably connected to the inner part of the outer tube body, and the fixing bolt is connected to the outer upper side wall of the outer tube body, and the head of the fixing bolt is in contact with the inner rod body.

[0015] Preferably, the angle adjuster includes a dial, a rotating disk, a rotating shaft, and a bearing; a bearing is installed in the middle of the dial, the rotating shaft at the bottom of the rotating disk is installed on the inner ring of the bearing, a scale line layer is provided at the inner edge of the upper end surface of the dial, and an indicator line layer is provided on the side wall of the rotating disk.

[0016] Preferably, the clamping mechanism includes a lower clamping plate, an upper clamping plate, a guide rod, a clamping spring and a limit plate; guide rods are installed at the four corners of the upper end surface of the lower clamping plate, the upper clamping plate is movably connected to the four guide rods, the upper end of the guide rod is sleeved with a clamping spring, the upper end of the guide rod is installed with a limit plate, and clamping grooves are opened on the inner walls of the lower clamping plate and the upper clamping plate.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. The rapid assembly of the experimental rack is achieved through the horizontal slide rail and the longitudinal slide rail. At the same time, it is fast and stable during assembly, and can cooperate with the movement and positioning of the components of the rapid assembly experimental rack.

[0019] Second, a quick assembly rack with quick assembly test rack components is used to achieve quick installation on the test rack. At the same time, the quick assembly rack can be disassembled and installed at any time, and can be moved and positioned on the test rack.

[0020] 3. Use the telescopic adjustment rod of the quick-assembly experimental rack assembly to adjust the height of the experimental equipment so that the experimental equipment is on the same horizontal line.

[0021] Fourth, the angle adjuster of the quick-assembly experimental frame assembly is used to quickly adjust the angle to meet the needs of the experiment.

[0022] 5. The clamping mechanism of the quick-assembly experimental frame assembly is used to realize the clamping installation of the experimental equipment, and it can also be quickly disassembled with high stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] For ease of explanation, the present invention is described in detail by the following specific embodiments and drawings.

[0024] Figure 1 It is a schematic diagram of the structure of the utility model;

[0025] Figure 2 It is a structural schematic diagram of the transverse slide rail in the utility model;

[0026] Figure 3 It is a structural schematic diagram of the longitudinal slide rail in the utility model;

[0027] Figure 4 It is a structural schematic diagram of the quick assembly type experimental rack assembly in the utility model;

[0028] Figure 5 It is a structural schematic diagram of the rapid assembly rack in the utility model;

[0029] Figure 6 It is a structural schematic diagram of the positioning block in the utility model;

[0030] Figure 7 It is a structural schematic diagram of the telescopic adjustment rod in the utility model;

[0031] Figure 8 This is a schematic diagram of the structure of the angle adjuster in the utility model;

[0032] Fig. 9 It is a cross-sectional view of the angle adjuster in the utility model;

[0033] Fig.10 It is a structural schematic diagram of the clamping mechanism in the utility model;

[0034] Fig.11 Schematic diagram of the basic optical path of the polarized light interference experiment in this specific implementation manner.

[0035] In the figure: 1- horizontal slide rail; 2- vertical slide rail; 3- quick assembly experimental rack assembly;

[0036] 11-laser; 12-beam expander; 13-convex lens; 14-beam splitter 1; 15-reflector 1; 16-reflector 2; 17-beam splitter 2.

[0037] 1-1-sliding slot; 1-2-positioning slot; 1-3-connecting slot;

[0038] 2-1-T-shaped connecting block; 2-2-locking threaded hole;

[0039] 3-1-Quick assembly frame; 3-2-Telescopic adjustment rod; 3-3-Angle adjuster; 3-4-Clamping mechanism;

[0040] 3-11-sliding block; 3-12-sliding pole; 3-13-positioning block; 3-14-reset spring; 3-15-upper mounting plate; 3-16-anti-slip pad; 3-17-anti-slip groove;

[0041] 3-21-lower mounting plate; 3-22-outer tube body; 3-23-inner rod body; 3-24-fixing bolt;

[0042] 3-31- scale plate; 3-32- rotating plate; 3-33- rotating shaft; 3-34- bearing; 3-35- scale line layer; 3-36- indicating line layer;

[0043] 3-41-lower clamping plate; 3-42-upper clamping plate; 3-43-guide rod; 3-44-clamping spring; 3-45-limiting plate; 3-46-clamping groove. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical scheme and advantages of the utility model clearer, the utility model is described below by the specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions that can be implemented in the utility model, so they have no technical substantive significance. Any structural modification, change in proportional relationship or adjustment of size, without affecting the effects that can be produced by the utility model and the purposes that can be achieved, should still fall within the scope of the technical content disclosed by the utility model. In addition, in the following description, the description of known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0045] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the scheme according to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0046] like Figure 1 , Figure 2 , Figure 3As shown, this specific embodiment uses a transverse slide rail and a longitudinal slide rail to assemble a bracket body, and specifically adopts the following technical solution: including a transverse slide rail 1 and a longitudinal slide rail 2; two longitudinal slide rails 2 are inserted between the two transverse slide rails 1, such as Figure 2 As shown, both side walls of the transverse slide rail 1 are provided with T-shaped connecting grooves 1-3. Figure 3 As shown, both ends of the longitudinal rail 2 are installed with T-shaped connecting blocks 2-1, which are inserted into the connecting groove 1-3. The T-shaped connecting block 2-1 is connected to the connecting groove 1-3 of the transverse rail 1, so that the frame can be combined; one end of the T-shaped connecting block 2-1 is integrally connected with a locking plate, which extends outside the width edge of the longitudinal rail 2, and a locking threaded hole 2-2 is provided in the middle of the locking plate. A locking bolt is installed on the locking threaded hole 2-2, and the locking bolt can lock the locking plate to the transverse rail 1, which can improve the stability between the transverse rail 1 and the longitudinal rail 2. Figure 2 , Figure 3 As shown, the middle part of the upper end surface of the transverse slide rail 1 and the longitudinal slide rail 2 is provided with a concave T-shaped sliding groove 1-1, and the sliding groove 1-1 can realize the sliding of the quick-assembly type experimental rack component 3. The upper end surfaces of the transverse slide rail 1 and the longitudinal slide rail 2 are provided with concave positioning grooves 1-2 on both sides, and the positioning grooves 1-2 can realize the positioning of the quick-assembly type experimental rack component 3, so that the quick-assembly type experimental rack component 3 can be stably fixed on the slide rail.

[0047] like Figure 1 As shown, in this specific embodiment, the installation and installation on the experimental rack is realized by a quick assembly method, which is convenient for quickly adding experimental devices. The specific technical scheme is as follows: including a quick assembly type experimental rack component 3; several quick assembly type experimental rack components 3 are respectively installed on the horizontal slide rail 1 and the longitudinal slide rail 2. Figure 4 As shown, the quick assembly experimental frame assembly 3 includes a quick assembly frame 3-1, a telescopic adjustment rod 3-2, an angle adjuster 3-3, and a clamping mechanism 3-4; the upper end of the quick assembly frame 3-1 is equipped with a telescopic adjustment rod 3-2, the quick assembly frame 3-1 can be installed on the sliding groove 1-1 on the transverse slide rail 1 and the longitudinal slide rail 2, and fixed on the positioning groove 1-2, the telescopic adjustment rod 3-2 can adjust the height of the experimental device, the upper end of the telescopic adjustment rod 3-2 is equipped with an angle adjuster 3-3, the angle adjuster 3-3 can adjust the angle, the upper end of the angle adjuster 3-3 is equipped with a clamping mechanism 3-4, and the clamping mechanism 3-4 can clamp the experimental device.

[0048] like Figure 5 , Figure 6As shown, the quick assembly frame 3-1 in this specific embodiment includes a sliding block 3-11, a sliding upright rod 3-12, a positioning block 3-13, a return spring 3-14, and an upper mounting plate 3-15; a sliding upright rod 3-12 is installed in the middle of the upper end surface of the sliding block 3-11, and the sliding block 3-11 can slide in the sliding groove 1-1, and the length of the sliding block 3-11 is less than the bottom width of the sliding groove 1-1, so that the sliding block 3-11 can rotate in the sliding groove 1-1, and the width and thickness of the sliding upright rod 3-12 are both less than the width of the upper part of the sliding groove 1-1. The sliding column 3-12 rotates in the sliding groove 1-1, and the positioning block 3-13 is movably connected to the sliding column 3-12. The positioning block 3-13 can slide on the sliding column 3-12. The upper end of the sliding column 3-12 is installed with an upper mounting plate 3-15, and the upper mounting plate 3-15 can realize the installation of the telescopic adjustment rod 3-2. The upper side of the sliding column 3-12 is sleeved with a reset spring 3-14, and the reset spring 3-14 can realize the clamping of the positioning block 3-13. The reset spring 3-14 is set between the positioning block 3-13 and the upper mounting plate 3-15. Figure 6 As shown, both ends of the positioning block 3-13 are provided with protruding positioning parts, and the positioning parts can be positioned in the positioning groove 1-2. The bottom of the positioning part is installed with an anti-skid pad 3-16, and the anti-skid pad 3-16 can achieve anti-skid and facilitate fixation. Anti-skid grooves 3-17 are provided on both sides of the bottom of the positioning block 3-13, and the anti-skid grooves 3-17 can achieve contact with the upper end surface of the slide rail to facilitate anti-skid.

[0049] The installation method of the quick assembly frame 3-1 in this specific embodiment is: slide the positioning block 3-13 up, the return spring 3-14 is in a compressed state, and then extend the sliding block 3-11 from the upper part of the sliding groove 1-1 into the sliding groove 1-1, then rotate the sliding upright 3-12 90 degrees, and put down the positioning block 3-13, so that the positioning part of the positioning block 3-13 is clamped in the positioning groove 1-2, and the installation is completed at this time. After installation, the anti-skid pad 3-16 and the anti-skid groove 3-17 are anti-skid, which is convenient for improving stability. At the same time, when it is necessary to move and adjust the position, slide the positioning block 3-13 up, and then the position can be directly adjusted by sliding.

[0050] like Figure 7 As shown, the telescopic adjustment rod 3-2 in this specific embodiment includes a lower mounting plate 3-21, an outer tube body 3-22, an inner rod body 3-23, and a fixing bolt 3-24; the outer tube body 3-22 is installed in the middle of the upper end of the lower mounting plate 3-21, the inner tube body 3-23 is movably connected inside the outer tube body 3-22, and the fixing bolt 3-24 is connected to the outer upper side wall of the outer tube body 3-22, and the head of the fixing bolt 3-24 is in contact with the inner rod body 3-23. When adjusting, the fixing bolt 3-24 is loosened, and the inner rod body 3-23 is pulled up or pressed down to adjust the height. After the adjustment is completed, the fixing bolt 3-24 can be tightened.

[0051] like Figure 8 , Fig. 9 As shown, the angle adjuster 3-3 in this specific embodiment includes a dial 3-31, a rotating disk 3-32, a rotating shaft 3-33, and a bearing 3-34; a bearing 3-34 is installed in the middle of the dial 3-31, and the rotating shaft 3-33 at the bottom of the rotating disk 3-32 is installed on the inner ring of the bearing 3-34. A scale line layer 3-35 is provided at the inner edge of the upper end surface of the dial 3-31, and an indicator line layer 3-36 is provided on the side wall of the rotating disk 3-32. The angle adjustment is performed last. When adjusting, it is achieved by rotating the rotating disk 3-32, and the indicator line layer 3-36 cooperates with the scale line layer 3-35 to achieve the observation and adjustment angle. After the adjustment is completed, the angle adjuster 3-3 in this specific embodiment can be a non-fixed type or a fixed type, which depends on the experimental requirements. The fixed type requires a fixing bolt to be installed at the bottom of the dial 3-31, and locking is achieved by the head of the fixing bolt contacting the inner edge of the bottom of the rotating disk 3-32.

[0052] like Fig.10 As shown, the clamping mechanism 3-4 in this specific embodiment includes a lower clamping plate 3-41, an upper clamping plate 3-42, a guide rod 3-43, a clamping spring 3-44, and a limit plate 3-45; guide rods 3-43 are installed at the four corners of the upper end surface of the lower clamping plate 3-41, the upper clamping plate 3-42 is movably connected to the four guide rods 3-43, the upper end of the guide rod 3-43 is sleeved with a clamping spring 3-44, and the upper end of the guide rod 3-43 is installed with a limit plate 3-45, and clamping grooves 3-46 are provided on the inner side walls of the lower clamping plate 3-41 and the upper clamping plate 3-42. When installing, the upper clamping plate 3-42 is pulled up, and the experimental equipment can be clamped between the lower clamping plate 3-41 and the upper clamping plate 3-42, and some lenses can be installed in the clamping grooves 3-46.

[0053] like Fig.11 As shown, the basic optical path experiment in this specific implementation is: the laser 11 emits a beam of light, which passes through the beam expander 12 and the convex lens 13 in sequence to become parallel light, and then passes through the beam splitter 14 to be divided into two beams; one beam of transmitted light falls on the reflector 1 15, and the other beam of reflected light falls on the reflector 2 16. The reflector 1 15 and the reflector 2 16 respectively reflect the two beams of light to the beam splitter 2 17, and make the two beams of light overlap. If the optical path is adjusted appropriately, light and dark will be seen on the light screen.

[0054] When conducting a polarized light interference experiment based on the above optical path, a polarizing plate is placed behind the convex lens 13, between the beam splitter 14 and the reflector 16, between the reflector 15 and the beam splitter 17, and behind the beam splitter 17. At this point, the basic optical path of the experiment is formed. According to the specific experimental purpose, auxiliary instruments such as air chambers and plastic sheets can be added at different positions to measure the refractive index of air, observe the stress changes of glass sheets, etc.

[0055] The assembly method of this specific embodiment is: the assembly between the transverse slide rail 1 and the longitudinal slide rail 2, the two longitudinal slide rails 2 are inserted into the connecting groove 1-3 of the transverse slide rail 1 through the T-shaped connecting block 2-1 to realize the assembly of the experimental frame, after the assembly is completed, the locking bolt can lock the locking plate on the transverse slide rail 1, and then the quick assembly frame 3-1 of the quick assembly type experimental frame assembly is installed on the transverse slide rail 1 and the longitudinal slide rail 2 according to the requirements of the experiment, at this time, quick installation can be achieved, and the experimental device is installed on the clamping mechanism 3-4, the height of the experimental device is achieved by the telescopic adjustment rod, and the angle is adjusted by the angle adjuster 3-3, at this time, the installation can be completed, which can realize the adjustment of the position and the quick installation of experimental devices on the two devices without the need to dismantle all of them.

[0056] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

[0057] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A polarized light interference experimental device, characterized in that: The invention comprises a transverse slide rail (1), a longitudinal slide rail (2), and a quick-assembly type experimental rack component (3); two longitudinal slide rails (2) are inserted between the two transverse slide rails (1), and a plurality of quick-assembly type experimental rack components (3) are respectively installed on the transverse slide rail (1) and the longitudinal slide rail (2).

2. The polarized light interference experimental device according to claim 1, characterized in that: The middle of the upper end surfaces of the transverse slide rail (1) and the longitudinal slide rail (2) are provided with an inwardly concave T-shaped sliding groove (1-1), and both sides of the upper end surfaces of the transverse slide rail (1) and the longitudinal slide rail (2) are provided with inwardly concave positioning grooves (1-2).

3. The polarized light interference experimental device according to claim 1, characterized in that: T-shaped connecting grooves (1-3) are provided on both side walls of the transverse slide rail (1), and T-shaped connecting blocks (2-1) are installed at both ends of the longitudinal slide rail (2), and the T-shaped connecting blocks (2-1) are inserted into the connecting grooves (1-3).

4. The polarized light interference experimental device according to claim 3, characterized in that: One end of the T-shaped connecting block (2-1) is integrally connected with a locking plate, the locking plate extends outside the width edge of the longitudinal slide rail (2), a locking threaded hole (2-2) is provided in the middle of the locking plate, and a locking bolt is installed on the locking threaded hole (2-2).

5. The polarized light interference experimental device according to claim 1, characterized in that: The quick assembly type experimental frame assembly (3) comprises a quick assembly frame (3-1), a telescopic adjustment rod (3-2), an angle adjuster (3-3), and a clamping mechanism (3-4); the telescopic adjustment rod (3-2) is installed at the upper end of the quick assembly frame (3-1), the angle adjuster (3-3) is installed at the upper end of the telescopic adjustment rod (3-2), and the clamping mechanism (3-4) is installed at the upper end of the angle adjuster (3-3).

6. The polarized light interference experimental device according to claim 5, characterized in that: The quick assembly frame (3-1) comprises a sliding block (3-11), a sliding upright rod (3-12), a positioning block (3-13), a return spring (3-14), and an upper mounting plate (3-15); a sliding upright rod (3-12) is mounted in the middle of the upper end surface of the sliding block (3-11); the positioning block (3-13) is movably connected to the sliding upright rod (3-12); an upper mounting plate (3-15) is mounted on the upper end of the sliding upright rod (3-12); a return spring (3-14) is sleeved on the upper side of the sliding upright rod (3-12); and the return spring (3-14) is arranged between the positioning block (3-13) and the upper mounting plate (3-15).

7. The polarized light interference experimental device according to claim 6, characterized in that: Both ends of the positioning block (3-13) are provided with protruding positioning parts, the bottom of the positioning parts is installed with anti-skid pads (3-16), and both sides of the bottom of the positioning block (3-13) are provided with anti-skid grooves (3-17).

8. The polarized light interference experimental device according to claim 5, characterized in that: The telescopic adjustment rod (3-2) comprises a lower mounting plate (3-21), an outer tube body (3-22), an inner rod body (3-23), and a fixing bolt (3-24); the outer tube body (3-22) is mounted in the middle of the upper end of the lower mounting plate (3-21); the inner rod body (3-23) is movably connected inside the outer tube body (3-22); the fixing bolt (3-24) is connected to the outer upper side wall of the outer tube body (3-22); and the head of the fixing bolt (3-24) is in contact with the inner rod body (3-23).

9. The polarized light interference experimental device according to claim 5, characterized in that: The angle adjuster (3-3) comprises a scale plate (3-31), a rotating plate (3-32), a rotating shaft (3-33), and a bearing (3-34); the bearing (3-34) is installed in the middle of the scale plate (3-31), the rotating shaft (3-33) at the bottom of the rotating plate (3-32) is installed on the inner ring of the bearing (3-34), a scale line layer (3-35) is arranged at the inner edge of the upper end surface of the scale plate (3-31), and an indicator line layer (3-36) is arranged on the side wall of the rotating plate (3-32).

10. The polarized light interference experimental device according to claim 5, characterized in that: The clamping mechanism (3-4) comprises a lower clamping plate (3-41), an upper clamping plate (3-42), a guide rod (3-43), a clamping spring (3-44), and a limit plate (3-45); the guide rods (3-43) are installed at the four corners of the upper end surface of the lower clamping plate (3-41); the upper clamping plate (3-42) is movably connected to the four guide rods (3-43); the upper ends of the guide rods (3-43) are sleeved with clamping springs (3-44); the upper ends of the guide rods (3-43) are installed with limit plates (3-45); and the inner side walls of the lower clamping plate (3-41) and the upper clamping plate (3-42) are provided with clamping grooves (3-46).

Images