A high-precision diameter detection device based on optical measurement

Abstract

The utility model discloses a kind of high-precision diameter detection devices based on optical measurement, it is related to detection equipment technical field, including detection assembly, including workbench, linear motor and detection head, the linear motor is embedded in the inside of workbench, the detection head is set in the top of workbench;And, positioning assembly, including clamping piece, pressure piece and locking piece, the clamping piece is set in the inside of workbench, the pressure piece is set in the top of clamping piece, the locking piece is set in the top of pressure piece, the top of workbench is provided with displacement groove.The utility model has the beneficial effect that by the setting of positioning assembly, after being initially positioned and clamped by clamping piece to the measured article, according to the camber of the surface of measured article itself, good contact is made between pressure piece and the surface of measured article, secondary reinforcing clamping is realized, and locking operation is completed by cooperating with locking piece, and the stability of clamping different sizes of measured article is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of detection equipment technology, and in particular to a high-precision diameter detection device based on optical measurement. Background Technology

[0002] Optical measurement technology is a non-contact precision measurement method based on optical principles. It has significant advantages such as high precision, speed, and non-destructive properties, and is widely used in industrial, medical, semiconductor manufacturing, and scientific research fields. Optical measurement technology is also used for high-precision detection of the diameter of circular objects with cross-sections.

[0003] Existing diameter measuring devices generally use guide wheels to position and clamp circular objects to be measured. However, when faced with objects of different sizes, the guide wheels often cannot make good and tight contact with the surface of the object due to their fixed curvature. The object is prone to shaking, which affects the diameter measurement results. Utility Model Content

[0004] In view of the problems existing in the above-mentioned high-precision diameter detection devices based on optical measurement, this utility model is proposed.

[0005] Therefore, the problem to be solved by this utility model is that when the diameter detection device in the prior art faces objects of different sizes, the guide wheel itself has a fixed curvature and often cannot make good close contact with the surface of the object, causing the object to shake and thus affecting the diameter measurement result.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a high-precision diameter detection device based on optical measurement, comprising,

[0007] A detection assembly includes a worktable, a linear motor, and a detection head, wherein the linear motor is embedded inside the worktable, and the detection head is disposed on the top of the worktable; and,

[0008] The positioning assembly includes a clamping member, a pressing member, and a locking member. The clamping member is disposed inside the worktable, the pressing member is disposed on top of the clamping member, and the locking member is disposed on top of the pressing member.

[0009] As a preferred embodiment of the high-precision diameter detection device based on optical measurement described in this utility model, the top of the worktable is provided with a displacement groove, and the detection head is fixedly connected to the moving end of the linear motor.

[0010] As a preferred embodiment of the high-precision diameter detection device based on optical measurement described in this utility model, the clamping component includes a movable rod, a screw sleeve, a movable plate, and a bearing seat. The movable rod is movably connected to the worktable, the screw sleeve is disposed on the surface of the movable rod, the movable plate is rotatably connected to the top of the screw sleeve, and the bearing seat is rotatably connected to the other end of the movable plate.

[0011] As a preferred embodiment of the high-precision diameter detection device based on optical measurement described in this utility model, the surface of the movable rod is provided with threads and mates with a threaded sleeve, and the bearing seat mates with a displacement groove.

[0012] As a preferred embodiment of the high-precision diameter detection device based on optical measurement described in this utility model, the pressing member includes a first auxiliary seat, an elastic sleeve, and a second auxiliary seat. The first auxiliary seat is movably connected to the top of the bearing seat, the elastic sleeve is fixedly connected to the top of the first auxiliary seat, the second auxiliary seat is fixedly connected to the top of the elastic sleeve, and a guide strip is fixedly connected to the outer ring of the second auxiliary seat.

[0013] As a preferred embodiment of the high-precision diameter detection device based on optical measurement described in this utility model, the pressing component further includes a fixed sleeve, a sliding rod, and a positioning ring. The fixed sleeve is fixedly connected to the top of the first auxiliary seat, the sliding rod is slidably connected to the inside of the fixed sleeve, and the positioning ring is slidably connected to the outer ring of the fixed sleeve.

[0014] As a preferred embodiment of the high-precision diameter detection device based on optical measurement described in this utility model, wherein: a first spring is fixedly connected to the bottom of the slide rod, the other end of the first spring is fixedly connected to the inside of the fixed sleeve, an inclined plate is rotatably connected to the bottom of the positioning ring, and a pressing head is rotatably connected to the other end of the inclined plate.

[0015] As a preferred embodiment of the high-precision diameter detection device based on optical measurement described in this utility model, the locking component includes a positioning rod, which is rotatably connected to the top of the slide rod, and a pressing groove is provided on one side of the positioning rod.

[0016] As a preferred embodiment of the high-precision diameter detection device based on optical measurement described in this utility model, the locking component further includes a bearing ring, a housing, a sliding plate, a locking plate, and a pressing block. The bearing ring is rotatably connected to the outer ring of the fixed sleeve, the housing is disposed on the top of the worktable, the sliding plate is slidably connected to the inside of the housing, the locking plate is rotatably connected to one end of the sliding plate, and the pressing block is disposed on the top of the bearing ring.

[0017] As a preferred embodiment of the high-precision diameter detection device based on optical measurement described in this utility model, wherein: an auxiliary frame is fixedly connected to the outer ring of the bearing ring, a second spring is fixedly connected to the other end of the slide plate, the other end of the second spring is fixedly connected to the inner wall of the housing, a flat groove is provided at the bottom of the clamping plate, a third spring is sleeved on the surface of the pressing block, one end of the third spring is fixedly connected to the surface of the pressing block, and the other end of the third spring is fixedly connected to the surface of the clamping plate.

[0018] The beneficial effects of this utility model are as follows: by setting the positioning component, after the clamping component initially positions and clamps the object to be tested, the pressing component makes good contact with the surface of the object to be tested according to the curvature of the object's own surface, thereby achieving secondary reinforcement clamping, and the locking component completes the locking operation, ensuring the clamping stability of objects to be tested of different sizes. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a structural diagram of a high-precision diameter detection device based on optical measurement.

[0021] Figure 2 This is a cross-sectional view of a high-precision diameter measuring device based on optical measurement.

[0022] Figure 3 This is a structural diagram of the detection component of a high-precision diameter detection device based on optical measurement.

[0023] Figure 4 This is a structural diagram of the positioning component of a high-precision diameter detection device based on optical measurement.

[0024] Figure 5 This is a structural diagram of the clamping components for a high-precision diameter detection device based on optical measurement.

[0025] Figure 6 This is a cross-sectional view of the pressing component of a high-precision diameter detection device for optical measurement.

[0026] Figure 7 A high-precision diameter detection device based on optical measurement Figure 6 A magnified view of A in the middle.

[0027] Figure 8 This is a diagram showing the separation of the locking mechanism in a high-precision diameter detection device for optical measurement.

[0028] Figure 9 A high-precision diameter detection device based on optical measurement Figure 8 A magnified view of B in the middle.

[0029] In the diagram: 100, Detection component; 101, Worktable; 101a, Displacement groove; 102, Linear motor; 103, Detection head; 200, Positioning component; 201, Clamping component; 201a, Movable rod; 201a-1, Thread; 201b, Threaded sleeve; 201c, Movable plate; 201d, Bearing seat; 202, Pressing component; 202a, First auxiliary seat; 202b, Elastic sleeve; 202c, Second auxiliary seat; 202c-1, Guide bar; 202d, Fixed sleeve. ; 202e, sliding rod; 202e-1, first spring; 202f, positioning ring; 202f-1, inclined plate; 202f-1a, pressing head; 203, locking component; 203a, positioning rod; 203a-1, pressing groove; 203b, bearing ring; 203b-1, auxiliary frame; 203c, housing; 203d, sliding plate; 203d-1, second spring; 203e, clamping plate; 203e-1, flat groove; 203f, pressing block; 203f-1, third spring. Detailed Implementation

[0030] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0031] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0032] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0033] Example 1

[0034] Reference Figure 1 and Figure 2This is the first embodiment of the present invention. This embodiment provides a high-precision diameter detection device based on optical measurement. The high-precision diameter detection device based on optical measurement includes a detection component 100 and a positioning component 200. By setting the positioning component 200, after the object to be measured is initially positioned and clamped, it can make good contact with the surface of the object to be measured again according to the curvature of the surface of the object to be measured, realize secondary reinforcement clamping, and complete the locking operation, so as to ensure the clamping stability of objects to be measured of different sizes.

[0035] Specifically, the detection component 100 includes a worktable 101, a linear motor 102, and a detection head 103. The linear motor 102 is embedded inside the worktable 101, and the detection head 103 is located on the top of the worktable 101.

[0036] By configuring the linear motor 102 and the detection head 103, the detection head 103 can be driven to perform displacement movements when the linear motor 102 is in operation, so as to measure the diameter of the object to be measured at different positions. The working principle of this part is existing technology, which can be clearly understood by those skilled in the art, and will not be described in detail here.

[0037] Specifically, the positioning component 200 includes a clamping member 201, a pressing member 202, and a locking member 203. The clamping member 201 is disposed inside the worktable 101, the pressing member 202 is disposed on the top of the clamping member 201, and the locking member 203 is disposed on the top of the pressing member 202.

[0038] By setting the clamping component 201, the object to be tested can be initially positioned and clamped, and the object to be tested can be placed at the top center of the workbench 101, below the detection head 103.

[0039] By setting the pressure member 202, it can fit well with the surface of the test item according to the different specifications of the test item, improve the clamping stability, and effectively prevent the test item from shaking.

[0040] By setting the locking component 203, a locking operation can be performed after the second clamping is completed, ensuring the overall clamping stability of the item to be tested.

[0041] Example 2

[0042] Reference Figures 2-9 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0043] Specifically, a displacement groove 101a is provided on the top of the workbench 101, and the detection head 103 is fixedly connected to the moving end of the linear motor 102.

[0044] The clamping component 201 includes a movable rod 201a, a threaded sleeve 201b, a movable plate 201c, and a bearing seat 201d. The movable rod 201a is movably connected to the worktable 101. The threaded sleeve 201b is disposed on the surface of the movable rod 201a. The movable plate 201c is rotatably connected to the top of the threaded sleeve 201b. The bearing seat 201d is rotatably connected to the other end of the movable plate 201c.

[0045] The displacement groove 101a provides displacement space for the support 201d and guides the movement of the support 201d, ensuring the displacement stability of the support 201d.

[0046] The movable rod 201a is movably connected to the worktable 101 via a bearing to improve the rotational stability of the movable rod 201a.

[0047] Both ends of the movable rod 201a are fixedly connected to handwheels, which allow staff to easily drive the movable rod 201a to rotate.

[0048] By setting the movable plate 201c, when the screw sleeve 201b is displaced, the bearing seat 201d can be linked to move synchronously, and under the guidance of the displacement groove 101a, the bearing seat 201d can be displaced in the displacement groove 101a.

[0049] The surface of the movable rod 201a is provided with threads 201a-1, which cooperate with the threaded sleeve 201b, and the bearing seat 201d cooperates with the displacement groove 101a.

[0050] There are two threads 201a-1, which are symmetrically distributed on the movable rod 201a. The threads of the two threads 201a-1 are opposite. Through the arrangement of threads 201a-1 and threaded sleeve 201b, the thread transmission function can be achieved. When the movable rod 201a is driven to rotate continuously, the threaded sleeve 201b will generate lateral displacement.

[0051] The pressing component 202 includes a first auxiliary seat 202a, an elastic sleeve 202b, and a second auxiliary seat 202c. The first auxiliary seat 202a is movably connected to the top of the bearing seat 201d, the elastic sleeve 202b is fixedly connected to the top of the first auxiliary seat 202a, and the second auxiliary seat 202c is fixedly connected to the top of the elastic sleeve 202b. A guide strip 202c-1 is fixedly connected to the outer ring of the second auxiliary seat 202c.

[0052] The pressing component 202 also includes a fixed sleeve 202d, a sliding rod 202e, and a positioning ring 202f. The fixed sleeve 202d is fixedly connected to the top of the first auxiliary seat 202a, the sliding rod 202e is slidably connected to the inside of the fixed sleeve 202d, and the positioning ring 202f is slidably connected to the outer ring of the fixed sleeve 202d.

[0053] The inner ring of the positioning ring 202f is fixedly connected to a short rod, and the other end of the short rod is fixedly connected to the outer ring of the slide rod 202e. The surface of the fixing sleeve 202d is provided with a vertical groove. The presence of the vertical groove is used to meet the displacement space requirements of the short rod. This design allows the positioning ring 202f and the slide rod 202e to be designed as a whole, and the two can move up and down together.

[0054] The bottom of the slide bar 202e is fixedly connected to a first spring 202e-1, and the other end of the first spring 202e-1 is fixedly connected to the inside of the fixed sleeve 202d. The bottom of the positioning ring 202f is rotatably connected to an inclined plate 202f-1, and the other end of the inclined plate 202f-1 is rotatably connected to a pressing head 202f-1a.

[0055] The first spring 202e-1 provides elastic support for the slide bar 202e, preventing it from moving downwards arbitrarily without external force.

[0056] One end of the guide bar 202c-1 passes through the pressure head 202f-1a, and the guide bar 202c-1 slides in contact with the pressure head 202f-1a, so that the guide bar 202c-1 can guide the displacement of the pressure head 202f-1a.

[0057] By setting up guide bar 202c-1, positioning ring 202f, inclined plate 202f-1 and pressing head 202f-1a, when positioning ring 202f moves down, the tops of multiple inclined plates 202f-1 move down. Under the guidance of guide bar 202c-1, multiple pressing heads 202f-1a move outward at the same time to contact elastic sleeve 202b and press against elastic sleeve 202b to produce elastic deformation.

[0058] The locking component 203 includes a positioning rod 203a, which is rotatably connected to the top of the slide rod 202e. A pressing groove 203a-1 is provided on one side of the positioning rod 203a.

[0059] The locking component 203 also includes a bearing ring 203b, a housing 203c, a sliding plate 203d, a locking plate 203e, and a pressing block 203f. The bearing ring 203b is rotatably connected to the outer ring of the fixed sleeve 202d. The housing 203c is disposed on the top of the worktable 101. The sliding plate 203d is slidably connected to the inside of the housing 203c. The locking plate 203e is rotatably connected to one end of the sliding plate 203d. The pressing block 203f is disposed on the top of the bearing ring 203b.

[0060] The positioning rod 203a and the slide rod 202e, as well as the bearing ring 203b and the slide rod 202e, are connected by cylindrical roller bearings. These bearings have comprehensive advantages, including high radial load capacity, low coefficient of friction, high-speed operation performance, compact structure, long service life, strong adaptability, and easy maintenance. By setting the positioning rod 203a and the bearing ring 203b, they can be movably installed so that the rotation of the first auxiliary seat 202a, elastic sleeve 202b, second auxiliary seat 202c, fixed sleeve 202d, and slide rod 202e will not affect the locking action of the locking member 203.

[0061] An auxiliary frame 203b-1 is fixedly connected to the outer ring of the bearing ring 203b. A second spring 203d-1 is fixedly connected to the other end of the slide plate 203d. The other end of the second spring 203d-1 is fixedly connected to the inner wall of the housing 203c. A flat groove 203e-1 is provided at the bottom of the clamping plate 203e. A third spring 203f-1 is fitted on the surface of the pressing block 203f. One end of the third spring 203f-1 is fixedly connected to the surface of the pressing block 203f, and the other end of the third spring 203f-1 is fixedly connected to the surface of the clamping plate 203e.

[0062] By setting up the pressure groove 203a-1 and the pressure block 203f, the pressure block 203f can be in close contact with the pressure groove 203a-1 when it is inserted, thereby preventing the positioning rod 203a from sliding randomly and ensuring the stability of the position of the slide rod 202e.

[0063] The card plate 203e is movably connected to the auxiliary frame 203b-1, and the pressing block 203f is slidably connected to one side of the auxiliary frame 203b-1. The auxiliary frame 203b-1 can meet the positioning and installation requirements of the card plate 203e, and at the same time guide the displacement of the pressing block 203f to ensure the stability of the pressing block 203f's movement.

[0064] The casing 203c is designed to accommodate and install the skateboard 203d and the second spring 203d-1, while also providing displacement space for the skateboard 203d.

[0065] The second spring 203d-1 provides elastic support for the skateboard 203d, preventing it from sliding or shifting arbitrarily without external force.

[0066] With the setting of the clamping plate 203e and the flat groove 203e-1, when the clamping plate 203e is rotated to the vertical position, one end of the clamping plate 203e is in close contact with the pressing block 203f. The third spring 203f-1 is compressed to drive the pressing block 203f into the pressing groove 203a-1 to complete the locking operation. When the clamping plate 203e is rotated to the horizontal position, the flat groove 203e-1 contacts the pressing block 203f. Under the elastic support of the third spring 203f-1, the pressing block 203f is no longer in close contact with the pressing groove 203a-1, completing the release operation. At this time, the positioning rod 203a can move up and down flexibly.

[0067] By setting the third spring 203f-1, elastic support can be provided for the pressure block 203f, thereby preventing the pressure block 203f from sliding arbitrarily without the action of external force.

[0068] When in use, the object to be tested is placed between the two pressing parts 202, and the movable rod 201a is driven to rotate forward. With the engagement of the screw thread 201a-1, the screw sleeve 201b is displaced outward. Under the connection of the movable plate 201c, the bearing seat 201d will slide in the displacement groove 101a, adjusting the position of the two pressing parts 202 and completing the initial positioning and clamping.

[0069] When the pressing block 203f is not in close contact with the pressing groove 203a-1, the clamping plate 203e is in a horizontal state, the sliding plate 203d is in a retracted state, the second spring 203d-1 is in a compressed state, the other end of the pressing block 203f is in contact with the flat groove 203e-1, and the third spring 203f-1 is in a natural state.

[0070] Pressing down the positioning rod 203a causes the slide rod 202e to move down synchronously, compressing the first spring 202e-1. As the slide rod 202e moves, the linkage positioning ring 202f moves down, and the upper end of the inclined plate 202f-1 gradually moves down. Guided by the guide bar 202c-1, the pressing head 202f-1a gradually moves outward, thereby pressing against the elastic sleeve 202b to produce elastic deformation. This allows the elastic sleeve 202b to make good contact with the circular object to be tested, achieving secondary positioning and clamping. When facing objects to be tested of different specifications, the clamping contact area can be guaranteed. Since the pressing part 202 is set separately, when facing irregularly shaped objects with different diameters on both sides, it can still ensure good contact with the irregularly shaped object to be tested, making the overall application range wider.

[0071] After the secondary positioning is completed, the sleeve 203c is lifted, causing the two slide plates 203d to move upward synchronously. This causes the locking plate 203e to rotate 90 degrees around the auxiliary frame 203b-1 until the locking plate 203e is in a vertical position. The pressing block 203f is then pushed outward and comes into close contact with the inner wall of the pressing groove 203a-1, thus locking the positioning rod 203a. In this state, the positioning rod 203a, the locking plate 203e, and the positioning ring 202f cannot move up or down at will.

[0072] When the pressing block 203f is in close contact with the pressing groove 203a-1, the clamping plate 203e is in a vertical state, the sliding plate 203d is in an extended state, the second spring 203d-1 is in a natural state, the other end of the pressing block 203f is in contact with the clamping plate 203e, and the third spring 203f-1 is in a compressed state.

[0073] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A high-precision diameter detection device based on optical measurement, characterized in that: include, The detection assembly (100) includes a worktable (101), a linear motor (102), and a detection head (103), wherein the linear motor (102) is embedded inside the worktable (101), and the detection head (103) is disposed on the top of the worktable (101); and, The positioning assembly (200) includes a clamping member (201), a pressing member (202), and a locking member (203). The clamping member (201) is disposed inside the worktable (101), the pressing member (202) is disposed on the top of the clamping member (201), and the locking member (203) is disposed on the top of the pressing member (202).

2. The high-precision diameter detection device based on optical measurement as described in claim 1, characterized in that: The top of the workbench (101) is provided with a displacement groove (101a), and the detection head (103) is fixedly connected to the moving end of the linear motor (102).

3. The high-precision diameter detection device based on optical measurement as described in claim 1, characterized in that: The clamping component (201) includes a movable rod (201a), a threaded sleeve (201b), a movable plate (201c), and a bearing seat (201d). The movable rod (201a) is movably connected to the workbench (101), the threaded sleeve (201b) is disposed on the surface of the movable rod (201a), the movable plate (201c) is rotatably connected to the top of the threaded sleeve (201b), and the bearing seat (201d) is rotatably connected to the other end of the movable plate (201c).

4. The high-precision diameter detection device based on optical measurement as described in claim 3, characterized in that: The surface of the movable rod (201a) is provided with threads (201a-1) and it cooperates with the threaded sleeve (201b). The bearing seat (201d) cooperates with the displacement groove (101a).

5. The high-precision diameter detection device based on optical measurement as described in claim 4, characterized in that: The pressing component (202) includes a first auxiliary seat (202a), an elastic sleeve (202b), and a second auxiliary seat (202c). The first auxiliary seat (202a) is movably connected to the top of the support seat (201d). The elastic sleeve (202b) is fixedly connected to the top of the first auxiliary seat (202a). The second auxiliary seat (202c) is fixedly connected to the top of the elastic sleeve (202b). A guide strip (202c-1) is fixedly connected to the outer ring of the second auxiliary seat (202c).

6. The high-precision diameter detection device based on optical measurement as described in claim 5, characterized in that: The pressing member (202) further includes a fixed sleeve (202d), a sliding rod (202e), and a positioning ring (202f). The fixed sleeve (202d) is fixedly connected to the top of the first auxiliary seat (202a), the sliding rod (202e) is slidably connected to the inside of the fixed sleeve (202d), and the positioning ring (202f) is slidably connected to the outer ring of the fixed sleeve (202d).

7. The high-precision diameter detection device based on optical measurement as described in claim 6, characterized in that: The bottom of the slide bar (202e) is fixedly connected to a first spring (202e-1), and the other end of the first spring (202e-1) is fixedly connected to the inside of the fixed sleeve (202d). The bottom of the positioning ring (202f) is rotatably connected to an inclined plate (202f-1), and the other end of the inclined plate (202f-1) is rotatably connected to a pressing head (202f-1a).

8. The high-precision diameter detection device based on optical measurement as described in claim 1, characterized in that: The locking component (203) includes a positioning rod (203a), which is rotatably connected to the top of the slide rod (202e). A pressing groove (203a-1) is provided on one side of the positioning rod (203a).

9. The high-precision diameter detection device based on optical measurement as described in claim 8, characterized in that: The locking component (203) further includes a bearing ring (203b), a housing (203c), a sliding plate (203d), a locking plate (203e), and a pressing block (203f). The bearing ring (203b) is rotatably connected to the outer ring of the fixed sleeve (202d). The housing (203c) is disposed on the top of the workbench (101). The sliding plate (203d) is slidably connected to the inside of the housing (203c). The locking plate (203e) is rotatably connected to one end of the sliding plate (203d). The pressing block (203f) is disposed on the top of the bearing ring (203b).

10. The high-precision diameter detection device based on optical measurement as described in claim 9, characterized in that: An auxiliary frame (203b-1) is fixedly connected to the outer ring of the bearing ring (203b). A second spring (203d-1) is fixedly connected to the other end of the slide plate (203d). The other end of the second spring (203d-1) is fixedly connected to the inner wall of the casing (203c). A flat groove (203e-1) is provided at the bottom of the clamping plate (203e). A third spring (203f-1) is sleeved on the surface of the pressing block (203f). One end of the third spring (203f-1) is fixedly connected to the surface of the pressing block (203f), and the other end of the third spring (203f-1) is fixedly connected to the surface of the clamping plate (203e).

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