Land planning marking device for land space planning

Abstract

The invention discloses a land planning marking device for land space planning, and relates to the technical field of land planning, the land planning marking device comprises a supporting cylinder, a positioning pointed cone is fixed at the bottom end of the supporting cylinder, an ejector rod driven to lift through a lifting adjusting mechanism slidably penetrates through the top end of the supporting cylinder, a base is fixed at the top end of the ejector rod, and a top cover sleeves the top end of the base in a threaded manner; the top cover is screwed to the top end of the base in a threaded mode, the spring telescopic rod at the bottom end in the base is used for providing upward ejection force for the supporting disc, and therefore the lamp holder can be limited and pressed at the top end of the inner side of the top cover, the lamp holder and the LED prompting lamp at the top end of the lamp holder can be conveniently disassembled, assembled and replaced, use is convenient, and practicability is high. And the lifting adjusting mechanism drives the ejector rod to ascend and descend, and drives the base and the top cover to ascend and descend to be adjusted to proper positions, so that the height of the LED prompting lamp meets the actual requirement, and the height of the LED prompting lamp is conveniently and adaptively adjusted according to the actual use requirement.

Description

Technical Field

[0001] The present invention relates to the technical field of land planning, and in particular to a land planning marking device for national land space planning. Background Art

[0002] The national land space planning is a guide for national spatial development, a spatial blueprint for sustainable development, and the basic basis for all types of development, protection, and construction activities. It includes master plans, detailed plans, and related special plans. It aims to optimize the pattern of national land space development and protection, strengthen the protection and management of ecological space, strictly observe urban development boundaries, and strictly control new urban construction land. In the process of national land space planning, it is often necessary to mark the land through land planning marking devices.

[0003] Based on the findings in the prior art, most of the existing land planning marking devices for national land space planning have fixed structures, and the LED lights used for marking prompts are generally fixed to the device body by bolts, which makes it inconvenient to disassemble and replace the LED lights when they are damaged, and is inconvenient to use. In addition, the method of adjusting the height of the telescopic inner rod by adjusting the screws is not convenient enough, and it is not convenient to conveniently and adaptively adjust the height of the LED lights according to actual use needs. Therefore, the present invention proposes a land planning marking device for national land space planning to solve the problems existing in the prior art. Summary of the invention

[0004] In view of the above problems, the purpose of the present invention is to propose a land planning marking device for national land space planning, so as to solve the problem that the LED lamp used for marking prompts in the existing land planning marking device for national land space planning is generally fixed to the device body by bolts, which makes it inconvenient to disassemble and replace the LED lamp when it is damaged, and it is not convenient to conveniently and adaptively adjust the height of the LED lamp according to actual use needs.

[0005] In order to achieve the purpose of the present invention, the present invention is implemented through the following technical solutions: a land planning marking device for national land space planning, including a support tube, a positioning cone is fixed at the bottom end of the support tube, a top rod driven to rise and fall by a lifting and lowering adjustment mechanism is slidably penetrated through the top end of the support tube, a base is fixed to the top end of the top rod through a detachable mounting assembly, a top cover is threadedly sleeved on the top end of the base, a spring telescopic rod is fixed to the bottom end of the base, a support plate is fixed to the top end of the spring telescopic rod, a lamp holder adapted to the support plate is embedded and plugged into the top end of the inner side of the top cover, an LED warning light is fixed to the top of the lamp holder that passes through the top of the top cover, batteries and GPS locators are respectively provided on both sides of the spring telescopic rod, and an auxiliary support mechanism is fixed to the outer wall of the support tube.

[0006] A further improvement is that the auxiliary support mechanism includes a support ring fixed to the outer wall of the support tube and a hinge groove symmetrically opened on the outer wall of the support ring, a threaded connecting rod is hinged inside the hinge groove, a threaded connecting tube is threadedly sleeved on the threaded connecting rod, a cone head is fixed at one end of the threaded connecting tube away from the threaded connecting rod, and a spirit level is fixed on the outer wall of the support tube.

[0007] A further improvement is that the lifting and lowering adjustment mechanism includes a screw rod rotatably connected to the inside of the support tube and driven to rotate by a knob, and a threaded plate threadedly sleeved on the screw rod, and the bottom end of the push rod is located inside the support tube and fixed to the top end of the threaded plate.

[0008] A further improvement is that a rotating shaft is fixed on the side of the knob close to the support tube, and the end of the rotating shaft away from the knob passes through the bearing to the inside of the support tube and is connected to the first bevel gear, and the lower part of the screw rod is fixedly sleeved with a second bevel gear meshing with the first bevel gear.

[0009] A further improvement is that an internal threaded connection ring is fixed on the top of the base, an external threaded connection ring adapted to the internal threaded connection ring is fixed on the bottom of the top cover, and the external threaded connection ring is threadedly sleeved on the outside of the internal threaded connection ring.

[0010] A further improvement is that: a first sealing groove is provided on the side where the bottom end of the external threaded connection ring and the top end of the base contact each other, and a first sealing ring is embedded between the upper and lower groups of the first sealing grooves.

[0011] A further improvement is that: an engaging groove adapted to the lamp holder is provided at the inner top of the top cover, a second sealing ring is fixed to the top of the lamp holder, and a second sealing groove adapted to the second sealing ring is provided on the inner wall of the engaging groove.

[0012] A further improvement is that the spring telescopic rod includes a sleeve fixed to the bottom end of the base and a slide rod fixed to the bottom end of the support plate, the bottom end of the slide rod slides through the sleeve and is fixedly connected to the bottom end of the sleeve through a limit spring.

[0013] A further improvement is that the detachable mounting assembly includes a mounting seat fixed to the bottom end of the base and a mounting plate fixed to the top end of the top rod, the bottom end of the mounting seat is provided with a mounting groove adapted to the mounting plate, and the mounting plate is fixedly connected to the mounting seat by an elastic clamping mechanism.

[0014] Further improvements are: the elastic snap-in mechanism includes a positioning pin that slides through the two side walls of the mounting seat and positioning holes opened on the outer walls of the two sides of the mounting plate, a pull ring is fixed to the end of the positioning pin located outside the mounting seat, and cavities located at the position of the positioning pin are opened on both sides of the interior of the mounting seat, a baffle is fixedly sleeved on one side of the positioning pin located in the cavity, and a linear spring sleeved on the outside of the positioning pin is fixed between the inner wall of the cavity on the side close to the pull ring and the baffle.

[0015] The beneficial effects of the present invention are as follows: the present invention includes a support tube, through which the top cover is screwed on the top of the base by threading, and the spring telescopic rod at the bottom end of the base provides an upward ejection force for the support plate, so that the lamp holder can be limited and pressed at the top end inside the top cover, so that the lamp holder and the LED prompt light on its top can be conveniently disassembled, assembled and replaced, and are easy to use. The top rod is driven up and down by the lifting and adjusting mechanism, and the base and the top cover are driven to lift and adjust to the appropriate position, so that the height of the LED prompt light meets the actual needs, so that the height of the LED prompt light can be conveniently and adaptively adjusted according to actual use needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a front view of the present invention;

[0017] Figure 2 is a front cross-sectional view of the present invention;

[0018] Figure 3 The present invention Figure 2 A in the enlarged view;

[0019] Figure 4 is a cross-sectional view of the base and top cover of the present invention;

[0020] Figure 5 The present invention Figure 4 The enlarged view of point B in the figure;

[0021] Figure 6 The present invention Figure 4 The enlarged view of point C in the figure;

[0022] Figure 7 It is a three-dimensional structural schematic diagram of the spring telescopic rod and the supporting plate of the present invention.

[0023] Among them: 1. Support tube; 2. Positioning cone; 3. Push rod; 4. Base; 5. Top cover; 6. Spring telescopic rod; 7. Support plate; 8. Lamp holder; 9. LED indicator light; 10. Battery; 11. GPS locator; 12. Support ring; 13. Articulated groove; 14. Threaded connecting rod; 15. Threaded connecting pipe; 16. Cone head; 17. Level; 18. Knob; 19. Screw; 20. Threaded plate; 21. Rotating shaft; 22. First cone gear; 23, second bevel gear; 24, internal thread connecting ring; 25, external thread connecting ring; 26, fitting groove; 27, second sealing ring; 28, second sealing groove; 29, first sealing groove; 30, first sealing ring; 31, mounting seat; 32, mounting plate; 33, positioning pin; 34, positioning hole; 35, pull ring; 36, cavity; 37, baffle; 38, linear spring; 601, sleeve; 602, slide rod; 603, limit spring. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] National land space planning refers to the spatial and temporal arrangements for the development and protection of national land space in a certain area. It is a guide for national spatial development, a spatial blueprint for sustainable development, and the basic basis for various development, protection and construction activities. It involves the scientific and orderly overall layout of ecological, agricultural, urban and other functional spaces, as well as the delineation of spatial control boundaries such as ecological red lines, permanent basic farmland, and urban development boundaries.

[0026] The land planning marking device used for national land space planning is a specially designed tool for precise marking in the process of land planning and national land space planning, aiming to improve the efficiency and accuracy of national land space planning, so that planners and engineers can carry out land planning more accurately, thus contributing to sustainable development and environmental protection;

[0027] However, the existing land planning marking device for national land space planning has the problem that it is not convenient to disassemble and replace the LED lamp when it is damaged, and it is not convenient to conveniently and adaptively adjust the height of the LED lamp according to actual use needs.

[0028] In view of the problems existing in the above-mentioned prior art, according to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6, Figure 7 As shown, this embodiment provides a land planning marking device for national land space planning, including a hollow support tube 1 and a positioning cone 2 welded and fixed to the bottom end of the support tube 1, the positioning cone 2 is inserted into the soil to provide support for the support tube 1, the top of the support tube 1 slides through two groups of symmetrically distributed top rods 3, and the two groups of top rods 3 are driven by a lifting and adjusting mechanism to move up and down, the top ends of the two groups of top rods 3 are fixed with a base 4 with a top opening through a detachable mounting assembly, so that the top rods 3 and the base 4 are easy to disassemble and assemble, and the top end of the base 4 is threadedly sleeved with a top cover 5 for sealing the top end of the base 4, the center position of the bottom end of the base 4 is fixed with a spring telescopic rod 6 with telescopic and rebound functions by bolts, the top end of the spring telescopic rod 6 is fixed with a support plate 7 by bolts, the top end of the inner side of the top cover 5 is embedded with a lamp holder 8, and the lamp holder 8 is compatible with the support plate 7 The top of the support plate 7 is provided with a groove adapted to the lamp holder 8, and the top of the lamp holder 8 is fixed with an LED prompt light 9, which passes through the top of the top cover 5. The top of the top cover 5 is provided with a through groove adapted to the LED prompt light 9, so that the LED prompt light 9 can extend out, and the top cover 5 is screwed on the top of the base 4, and the spring telescopic rod 6 at the bottom end of the base 4 is used to provide an upward ejection force for the support plate 7, so that the lamp holder 8 can be limited and pressed at the top of the inner side of the top cover 5, so that the lamp holder 8 together with the LED prompt light 9 at its top can be conveniently disassembled, assembled and replaced, and the lifting and adjusting mechanism drives the top rod 3 to move up and down, and drives the base 4 and the top cover 5 to move up and down to an appropriate position, so that the height of the LED prompt light 9 meets the actual needs, so that the height of the LED prompt light 9 can be conveniently and adaptively adjusted according to actual use needs;

[0029] A battery 10 and a GPS locator 11 fixed to the bottom end of the base 4 are respectively provided on the left and right sides of the spring telescopic rod 6. The battery 10 supplies power to the lamp holder 8 and the GPS locator 11. The GPS locator 11 is used to provide position coordinates. An auxiliary support mechanism for providing auxiliary support for the support tube 1 is fixed to the outer wall of the support tube 1 to further ensure its stability.

[0030] The auxiliary support mechanism includes a support ring 12 and a hinge groove 13, wherein the support ring 12 is fixed to the outer wall of the support tube 1 by screws, and the hinge groove 13 is provided with four groups and symmetrically opened on the outer wall of the support ring 12, and a threaded connecting rod 14 is hinged inside the hinge groove 13 through a hinge, and a threaded connecting pipe 15 is threadedly sleeved on the threaded connecting rod 14, and a cone head 16 is welded and fixed at one end of the threaded connecting pipe 15 away from the threaded connecting rod 14. First, the threaded connecting rod 14 is rotated to tilt downward, and then the threaded connecting pipe 15 is rotated to extend from the threaded connecting rod 14 until the cone head 16 is driven to insert into the soil, thereby utilizing four groups of threaded connecting rods 14 and threaded connecting pipes 15 to provide support force for the support tube 1 from four directions, further ensuring the stability of the support tube 1, and a spirit level 17 is fixed to the outer wall of the support tube 1 by screws, which is convenient for observing the horizontality of the support tube 1.

[0031] The lifting and lowering adjustment mechanism includes a knob 18, a screw rod 19 and a threaded plate 20, wherein the screw rod 19 is rotatably connected to the inside of the support tube 1 through a bearing and is driven to rotate by the knob 18, the threaded plate 20 is located inside the support tube 1 and is threadedly sleeved on the screw rod 19, the bottom end of the push rod 3 is located inside the support tube 1 and is fixed to the top of the threaded plate 20, and the screw rod 19 is driven to rotate by rotating the knob 18, so that the threaded plate 20 threadedly sleeved on the screw rod 19 drives the push rod 3 at its top to rise and fall synchronously.

[0032] A rotating shaft 21 is fixed to the side of the knob 18 close to the support tube 1 by a screw, and the end of the rotating shaft 21 away from the knob 18 passes through the interior of the support tube 1 through a bearing and is connected to the first bevel gear 22. A second bevel gear 23 is fixedly sleeved on the lower part of the screw rod 19, and the second bevel gear 23 is meshed with the first bevel gear 22. By turning the knob 18, the rotating shaft 21 drives the first bevel gear 22 to rotate, and the first bevel gear 22 then drives the second bevel gear 23 meshed with it to rotate, thereby realizing the rotation of the screw rod 19.

[0033] An internally threaded connecting ring 24 is fixed at the top of the base 4, and an external thread is provided on the outer wall of the internally threaded connecting ring 24. An externally threaded connecting ring 25 is fixed at the bottom end of the top cover 5, and an internal thread is provided on the inner wall of the externally threaded connecting ring 25 and is adapted to the internally threaded connecting ring 24. By threading the externally threaded connecting ring 25 onto the outer side of the internally threaded connecting ring 24, the top cover 5 is threadedly connected to the top of the base 4.

[0034] A first sealing groove 29 with a semicircular cross-section is provided on the side where the bottom end of the external threaded connecting ring 25 and the top end of the base 4 contact each other. The upper and lower groups of first sealing grooves 29 are spliced ​​together to form a sealing groove with a circular cross-section. A first sealing ring 30 is embedded between the upper and lower groups of first sealing grooves 29. When the top cover 5 is screwed onto the top end of the base 4, the first sealing ring 30 is clamped between the upper and lower groups of first sealing grooves 29 to improve the sealing between the base 4 and the top cover 5.

[0035] An interlocking groove 26 adapted to the lamp holder 8 is provided at the top inner side of the top cover 5. The lamp holder 8 is inserted into the interlocking groove 26 under the support of the support plate 7. A second sealing ring 27 is fixed to the top of the lamp holder 8. A second sealing groove 28 adapted to the second sealing ring 27 is provided on the inner wall of the interlocking groove 26. The cooperation between the second sealing ring 27 and the second sealing groove 28 improves the sealing between the lamp holder 8 and the interlocking groove 26.

[0036] The spring telescopic rod 6 includes a sleeve 601 and a slide rod 602, wherein the sleeve 601 is fixed to the bottom end of the base 4 by bolts, and the slide rod 602 is fixed to the bottom end of the support plate 7 by bolts. The bottom end of the slide rod 602 slides through the sleeve 601 and is fixedly connected to the bottom end of the sleeve 601 by a limit spring 603. The limit spring 603 provides an upward elastic ejection force for the slide rod 602, so that the support plate 7 can be lifted upward.

[0037] The detachable mounting assembly includes a mounting seat 31 and a mounting plate 32, wherein the mounting seat 31 is fixed to the bottom end of the base 4 by bolts, and the mounting plate 32 is fixed to the top end of the top rod 3 by bolts. A mounting groove is provided at the bottom end of the mounting seat 31, and the mounting groove is adapted to the mounting plate 32, so that the mounting plate 32 can be embedded and installed to the bottom end of the mounting seat 31, and the mounting plate 32 and the mounting seat 31 are fixedly connected by an elastic clamping mechanism to realize the detachable installation between the mounting plate 32 and the mounting seat 31.

[0038] The elastic clamping mechanism includes a positioning pin 33 and a positioning hole 34, wherein the positioning pin 33 is provided with two groups and slides through the left and right side walls of the mounting seat 31 respectively, and the positioning hole 34 is provided with two groups and is respectively opened on the left and right side outer walls of the mounting plate 32, and the positioning hole 34 is adapted to the positioning pin 33, and the positioning clamping between the mounting seat 31 and the mounting plate 32 is realized by inserting the positioning pin 33 into the positioning hole 34, and the positioning clamping between the mounting seat 31 and the mounting plate 32 can be released by pulling the positioning pin 33 out of the positioning hole 34;

[0039] One end of the locating pin 33 located outside the mounting base 31 is fixed with a pull ring 35 by a screw, which is convenient for the user to pull the locating pin 33. Cavities 36 are opened on the left and right sides of the mounting base 31, and the cavity 36 is located at the position of the locating pin 33. One side of the locating pin 33 located in the cavity 36 is fixedly sleeved with a baffle 37, and the inner wall of the cavity 36 close to the pull ring 35 is fixed with a linear spring 38 slidably sleeved on the outside of the locating pin 33. The end of the linear spring 38 close to the baffle 37 is fixedly connected to the baffle 37, and the linear spring 38 provides an elastic ejection force for the baffle 37, so that the locating pin 33 can automatically rebound into the locating hole 34.

[0040] When it is necessary to carry out planning marking on the land in the national land space planning work, the land planning marking device for national land space planning is first carried to the location where marking is required, then a hole is punched at the location to be marked and the positioning cone 2 at the bottom end of the support tube 1 is inserted into the hole, and then the auxiliary support mechanism is used to provide stable support for the support tube 1, and then the lifting and adjusting mechanism is used to drive the top rod 3 to move up and down until the base 4 and the top cover 5 are driven to move up and down to the appropriate position so that the height of the LED prompt light 9 meets the actual needs, and then the LED prompt light 9 and the GPS locator 11 are turned on, and the LED prompt light 9 is used to prompt the surrounding area, so that the land planning marking device for national land space planning can be easily found at night, and the GPS locator 11 is used to provide positioning for the user, so that the user can quickly find the mark and avoid the loss of the device, that is, the land planning marking of the current area is completed, and then the above steps are repeated to mark the next location until the entire marking work is completed;

[0041] When the LED warning light 9 is damaged and needs to be disassembled and replaced, the top cover 5 is first unscrewed from the top of the base 4 to release the interference with the lamp holder 8, and then the lamp holder 8 together with the LED warning light 9 is taken out from the top cover 5, and the convenient disassembly work is completed. Subsequently, the new lamp holder 8 together with the LED warning light 9 are placed on the supporting plate 7, and the top cover 5 is screwed to the top of the base 4. At this time, the spring telescopic rod 6 provides an upward elastic ejection force for the supporting plate 7, and the supporting plate 7 then presses the lamp holder 8 to the top inner side of the top cover 5, and the LED warning light 9 passes through to the top of the top cover 5, and the convenient installation work of the LED warning light 9 is completed.

[0042] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A land planning marking device for national space planning, comprising a support tube (1), characterized in that: A positioning cone (2) is fixed at the bottom end of the support tube (1); a top rod (3) driven to rise and fall by a lifting adjustment mechanism is slidably penetrated through the top end of the support tube (1); a base (4) is fixed to the top end of the top rod (3) through a detachable mounting assembly; a top cover (5) is threadedly sleeved on the top end of the base (4); a spring telescopic rod (6) is fixed to the bottom end of the base (4); a support plate (7) is fixed to the top end of the spring telescopic rod (6); a lamp holder (8) adapted to the support plate (7) is inserted and engaged at the top end of the inner side of the top cover (5); an LED warning light (9) penetrating to the top of the top cover (5) is fixed to the top end of the lamp holder (8); batteries (10) and a GPS locator (11) are respectively provided on both sides of the spring telescopic rod (6); and an auxiliary support mechanism is fixed to the outer wall of the support tube (1).

2. A land planning marking device for national land space planning according to claim 1, characterized in that: The auxiliary support mechanism comprises a support ring (12) fixed to the outer wall of the support tube (1) and a hinge groove (13) symmetrically arranged on the outer wall of the support ring (12); a threaded connecting rod (14) is hinged inside the hinge groove (13); a threaded connecting pipe (15) is threadedly sleeved on the threaded connecting rod (14); a cone head (16) is fixed to one end of the threaded connecting pipe (15) away from the threaded connecting rod (14); and a level (17) is fixed to the outer wall of the support tube (1).

3. The land planning marking device for national land space planning according to claim 1 is characterized in that: The lifting and lowering adjustment mechanism comprises a screw rod (19) which is rotatably connected to the inside of the support tube (1) and driven to rotate by a knob (18), and a threaded plate (20) which is threadedly sleeved on the screw rod (19); the bottom end of the push rod (3) is located inside the support tube (1) and is fixed to the top end of the threaded plate (20).

4. A land planning marking device for national land space planning according to claim 3, characterized in that: A rotating shaft (21) is fixed on one side of the knob (18) close to the support tube (1); an end of the rotating shaft (21) away from the knob (18) passes through the interior of the support tube (1) through a bearing and is connected to a first bevel gear (22); a second bevel gear (23) meshing with the first bevel gear (22) is fixedly sleeved on the lower part of the screw rod (19).

5. The land planning marking device for national land space planning according to claim 1 is characterized in that: An internal thread connection ring (24) is fixed on the top end of the base (4), and an external thread connection ring (25) adapted to the internal thread connection ring (24) is fixed on the bottom end of the top cover (5), wherein the external thread connection ring (25) is threadedly sleeved on the outside of the internal thread connection ring (24).

6. A land planning marking device for national land space planning according to claim 5, characterized in that: A first sealing groove (29) is provided on the side where the bottom end of the external threaded connection ring (25) and the top end of the base (4) contact each other, and a first sealing ring (30) is embedded between the upper and lower groups of the first sealing grooves (29).

7. The land planning marking device for national land space planning according to claim 1, characterized in that: The top inner side of the top cover (5) is provided with an engaging groove (26) adapted to the lamp holder (8), a second sealing ring (27) is fixed to the top inner side of the lamp holder (8), and the inner wall of the engaging groove (26) is provided with a second sealing groove (28) adapted to the second sealing ring (27).

8. The land planning marking device for national land space planning according to claim 1, characterized in that: The spring telescopic rod (6) comprises a sleeve (601) fixed to the bottom end of the base (4) and a slide rod (602) fixed to the bottom end of the support plate (7); the bottom end of the slide rod (602) slides through the inside of the sleeve (601) and is fixedly connected to the bottom end of the inside of the sleeve (601) via a limit spring (603).

9. The land planning marking device for national land space planning according to claim 1, characterized in that: The detachable mounting assembly comprises a mounting seat (31) fixed to the bottom end of the base (4) and a mounting plate (32) fixed to the top end of the top rod (3); a mounting groove adapted to the mounting plate (32) is provided at the bottom end of the mounting seat (31); and the mounting plate (32) is fixedly engaged with the mounting seat (31) via an elastic engaging mechanism.

10. A land planning marking device for national land space planning according to claim 9, characterized in that: The elastic clamping mechanism comprises a positioning pin (33) slidingly penetrating through the two side walls of the mounting seat (31) and a positioning hole (34) provided on the outer walls of the two sides of the mounting plate (32); a pull ring (35) is fixed to one end of the positioning pin (33) located outside the mounting seat (31); cavities (36) located at the position of the positioning pin (33) are provided on both sides of the interior of the mounting seat (31); a baffle (37) is fixedly sleeved on one side of the positioning pin (33) located in the cavity (36); and a linear spring (38) sleeved on the outside of the positioning pin (33) is fixed between the inner wall of one side of the cavity (36) close to the pull ring (35) and the baffle (37).

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