Patient transfer bin for plateau area

Abstract

The invention provides a patient transfer bin for a plateau region, and relates to the technical field of medical instruments, the patient transfer bin comprises a base, the top of the base is provided with a transfer bin body; a bin cover is arranged at the front part of the transfer bin body; a fixed seat is arranged in the transfer bin body; a movable frame is arranged at the top of the fixed seat; a positioning assembly is arranged on the fixing base, a rotary rod is driven to rotate through a rotary knob, reverse threads of the rotary rod are matched with a threaded sleeve, two adjusting frames can be driven to be adjusted towards the middle at the same time, a clamping block is connected with a positioning groove in a clamped mode, and ratchet claws can be connected with ratchet grooves in a clamped mode through the elastic effect of a first compression spring. The locking device can quickly complete locking of the bin cover, is convenient to open and close, omits the trouble of connection and fixation of tools and bolts, is more reasonable in structure, and solves the problem that the bin cover is troublesome to open and close due to the fact that the transfer bin and the bin cover are usually connected and fixed through the tools and locking bolts, the bolts are easy to freeze and a wrench is strenuous to operate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a patient transfer cabin for highland areas. BACKGROUND

[0002] The highland area is prone to cause patients to have high altitude reaction (such as pulmonary edema, cerebral edema) or aggravate the original condition due to low air pressure, low oxygen partial pressure and harsh climate. The patient transfer cabin is a closed medical transfer equipment specially designed for highland environment, which realizes the safe transfer of critically ill patients by constructing a simulated low-altitude air pressure and oxygen environment.

[0003] The existing patient transfer cabin for highland areas is connected and fixed with the cabin cover by tools and locking bolts during use. The bolts are prone to freeze, and the wrench operation is laborious, which makes the opening and closing process of the cabin cover troublesome. In addition, the moving frame in the transfer cabin is prone to jolt and shift during the transfer process, which causes the patient and the oxygen supply interface in the cabin to be misaligned, reduces the safety of the overall use of the transfer cabin, and the patient is prone to vomit during the transfer process, which requires the bed mattress to be disassembled and cleaned. However, the disassembly process of the bed mattress is time-consuming and laborious, which affects the operation efficiency. SUMMARY

[0004] The present application relates to a patient transfer cabin for highland areas, which is driven by a knob to rotate a rotating rod. The reverse threads of the rotating rod and the threaded sleeve are matched with each other, which can simultaneously drive two adjustment frames to adjust to the middle. The clamping block is clamped with the positioning groove, and the elastic action of the first compression spring can make the ratchet pawl clamped with the ratchet groove, which can quickly complete the locking of the cabin cover. The opening and closing operation is convenient, and the trouble of tool and bolt connection and fixation is eliminated, and the structure is more reasonable.

[0005] The present application provides a patient transfer cabin for highland areas, which specifically comprises: a base, the base top is provided with a transfer cabin body; the transfer cabin body front is provided with a cabin cover, and the cabin cover is hinged connected with the transfer cabin body through a hinge shaft; the transfer cabin body is provided with a fixing seat; the fixing seat top is provided with a moving frame; the fixing seat is provided with a positioning assembly; the moving frame top is provided with a bed plate. The base bottom is provided with four moving wheels, the base right side is provided with a placing cabinet, the placing cabinet top is provided with a control panel, and the control panel is located on the right side of the transfer cabin body.

[0006] Further, the transfer cabin body front end right side is provided with a connecting frame, the connecting frame is rotatably installed with a rotating rod through a damping sleeve, the rotating rod is provided with a spline sleeve, the connecting frame is provided with two adjustment frames, and the two adjustment frames are symmetrically distributed in an up-down manner.

[0007] Further, the connecting frame is provided with two limiting grooves, and the connecting frame top is provided with a ratchet groove. The outer circumferential surface of the rotating rod is provided with two reverse threads, the two reverse threads are symmetrically distributed in up and down, the top end of the rotating rod is provided with a knob, and the connecting position between the rotating rod and the knob is provided with a spline shaft; The bottom of the spline sleeve is provided with a ratchet claw, the spline sleeve is provided with a first compression spring, the spline sleeve is slidably sleeved on the spline shaft, the ratchet claw is matched with the ratchet groove, and the first compression spring is supported between the spline sleeve and the knob. The side of the adjusting frame is provided with a limiting block, the middle position of the adjusting frame is provided with a threaded sleeve, the other side of the adjusting frame is provided with a clamping block, the limiting block is slidably connected with the connecting frame through a limiting groove, and the threaded sleeve is slidably sleeved on the reverse threads of the rotating rod.

[0008] Further, one side of the cover is provided with a limiting sleeve, two positioning grooves are formed in the limiting sleeve, the two positioning grooves are symmetrically distributed in up and down, the clamping block of the adjusting frame is clamped with the positioning groove, and the clamping block of the adjusting frame is clamped with the positioning groove.

[0009] Further, the top of the fixing seat is provided with a limiting frame, the middle position of the limiting frame is provided with a groove, the front side position of the bottom of the limiting frame is provided with a servo motor, the servo motor is provided with a rotating shaft, the rotating shaft is rotatably connected with the limiting frame through a bearing frame, and the rotating shaft is provided with a gear.

[0010] Further, the bottom of the moving frame is provided with a limiting plate, the middle position of the bottom of the limiting plate is provided with a toothed plate, the moving frame is slidably connected with the limiting frame of the fixing seat through the limiting plate, the toothed plate is meshed with the gear, the middle position of the top of the moving frame is provided with a guide groove, the front end edge of the guide groove is provided with a second chamfer, and the guide groove is provided with a slot at the front end bottom wall.

[0011] Further, the bottom of the toothed plate is provided with a mounting block, the front and rear edges of the mounting block are provided with a first chamfer, and the front of the mounting block is provided with a stop block.

[0012] Further, the positioning assembly comprises a fixing plate, a positioning block, a limiting column, a stretching spring and a supporting plate, the fixing plate is symmetrically distributed in left and right, the positioning block is arranged between the two fixing plates, the bottom of the fixing plate is provided with a limiting column, the limiting column is sleeved with a stretching spring, the left and right sides of the positioning block are provided with a supporting plate, the limiting column is slidably penetrated through the supporting plate, the ends of the stretching spring are respectively connected with the supporting plate and the fixing plate, and the positioning block corresponds to the mounting block.

[0013] Further, the top of the bed plate is provided with a mattress, the bottom of the bed plate is provided with a guide block, the bed plate is slidably connected with the guide groove of the moving frame through the guide block, the bottom of the bed plate is provided with a limiting sleeve frame, and the limiting sleeve frame is slidably installed with a plug.

[0014] Further, the front and rear side walls of the limiting sleeve frame are provided with a through slot, the top of the limiting sleeve frame is provided with a fixing block, the bottom of the fixing block is provided with a plug rod, the plug rod is sleeved with a second compression spring. The plug block is provided with a sliding block on the front and back sides, and a plug hole on the top, the plug block is connected with the through slot through the sliding block, the plug rod is inserted into the plug hole, the second compression spring is supported between the plug block and the fixed block, and the plug block corresponds to the plug slot.

[0015] Compared with the prior art, the present application has the following beneficial effects: In the present application, the rotating rod is driven to rotate by the knob, the reverse thread of the rotating rod and the thread sleeve are matched with each other, two adjusting frames can be simultaneously driven to adjust to the middle, the clamping block is clamped with the positioning groove, the elastic effect of the first compression spring is utilized, the ratchet pawl is clamped with the ratchet groove, the locking of the cover can be quickly completed, the switch operation is convenient, the tool and the bolt connection are saved, and the structure is more reasonable.

[0016] In addition, in the present application, the servo motor provides power, the gear and the toothed plate are engaged and transmitted, the moving frame can be driven to slide along the limiting frame, the patient can be pushed into the transfer bin by the control bed plate, the positioning assembly and the mounting block are provided, the second chamfer of the mounting block and the positioning block are matched with each other, the moving frame can be effectively positioned after reaching the specified position in the transfer bin, the moving frame can be prevented from bumping and shifting during the transfer process, the patient and the oxygen supply interface in the bin can be prevented from being misaligned, and the safety of the transfer bin is improved.

[0017] In addition, in the present application, the plug block is pushed upward, the plug rod is inserted into the plug hole, the plug block is separated from the plug slot, the bed plate can be quickly disassembled by pulling the bed plate forward along the guide groove, and the cleaning and maintenance of the mattress are facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below.

[0019] The drawings described in the following description only relate to some embodiments of the present application, and are not limited to the present application.

[0020] In the drawings: Figure 1 A schematic view of the overall structure of the present application is shown; Figure 2 A schematic view of the present application is shown, in which the cover and the transfer bin are in an open state; Figure 3 A schematic view of the present application is shown, in which the connecting frame, the rotating rod, the spline sleeve and the adjusting frame are in an exploded state; Figure 4 A schematic view of the present application is shown, in which the cover is shown; Figure 5 A schematic view of the present application is shown, in which the fixed seat, the moving frame, the positioning assembly and the bed plate are shown; Figure 6 A schematic view of the mobile frame of the present application is shown in Figure 5 A schematic view of the mobile frame of the present application is shown in Figure 7 A schematic view of the mobile frame of the present application is shown in Figure 8 A schematic view of the mobile frame of the present application is shown in Figure 9 A schematic view of the mobile frame of the present application is shown in Figure 10 A schematic view of the mobile frame of the present application is shown in Figure 9 A schematic view of the mobile frame of the present application is shown in

[0021] List of reference signs: 1, base; 101, mobile wheel; 102, placing cabinet; 103, control panel; 2, transfer warehouse body; 201, connecting frame; 2011, limiting groove; 2012, ratchet groove; 202, rotating rod; 2021, reverse thread; 2022, knob; 2023, spline shaft; 203, spline sleeve; 2031, ratchet claw; 2032, first compression spring; 204, adjusting frame; 2041, limiting block; 2042, threaded sleeve; 2043, clamping block; 3, warehouse cover; 301, limiting sleeve; 302, positioning groove; 4, fixed seat; 401, limiting frame; 402, groove; 403, servo motor; 404, rotating shaft; 405, gear; 5, mobile frame; 501, limiting plate; 502, toothed plate; 5021, mounting block; 5022, first chamfer; 5023, stop block; 503, guide groove; 504, second chamfer; 505, insertion slot; 6, positioning assembly; 601, fixed plate; 602, positioning block; 603, limiting column; 604, tension spring; 605, support plate; 7, bed plate; 701, mattress; 702, guide block; 703, limiting sleeve frame; 7031, through groove; 7032, fixed block; 7033, insertion rod; 7034, second compression spring; 704, insertion block; 7041, sliding block; 7042, insertion hole. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

[0023] Embodiment one: please refer to Figures 1 to 10 : The application provides a patient transfer cabin for highland areas, which comprises a base 1, a transfer cabin body 2 arranged on the top of the base 1, a cabin cover 3 arranged on the front of the transfer cabin body 2 and hingedly connected with the transfer cabin body 2 through a hinge shaft, a fixing seat 4 arranged in the transfer cabin body 2, a moving frame 5 arranged on the top of the fixing seat 4, a positioning assembly 6 arranged on the fixing seat 4, and a bed plate 7 arranged on the top of the moving frame 5. The base 1 is provided with four moving wheels 101 at the bottom, and a placing cabinet 102 is arranged on the right side of the base 1, wherein the placing cabinet 102 is provided with a control panel 103 on the top and the control panel 103 is located on the right side of the transfer cabin body 2. A connecting frame 201 is arranged on the right side of the front end of the transfer cabin body 2, a rotating rod 202 is rotatably arranged on the connecting frame 201 through a damping sleeve, a spline sleeve 203 is arranged on the rotating rod 202, and two adjusting frames 204 are arranged on the connecting frame 201 and symmetrically distributed in an up-down mode.

[0024] As shown in the embodiment, Figures 2 to 4 two limiting grooves 2011 are arranged on the connecting frame 201, and a ratchet groove 2012 is arranged on the top of the connecting frame 201; Two reverse threads 2021 are arranged on the outer circumferential surface of the rotating rod 202 and symmetrically distributed in an up-down mode, a knob 2022 is arranged on the top end of the rotating rod 202, and a spline shaft 2023 is arranged at the connecting position of the rotating rod 202 and the knob 2022; A ratchet claw 2031 is arranged on the bottom of the spline sleeve 203, a first compression spring 2032 is arranged on the spline sleeve 203, the spline sleeve 203 is slidably sleeved on the spline shaft 2023, the ratchet claw 2031 is matched with the ratchet groove 2012, and the first compression spring 2032 is supported between the spline sleeve 203 and the knob 2022; A limiting block 2041 is arranged on one side of the adjusting frame 204, a threaded sleeve 2042 is arranged at the middle position of the adjusting frame 204, a clamping block 2043 is arranged on the other side of the adjusting frame 204, the limiting block 2041 is slidably connected with the connecting frame 201 through the limiting groove 2011, and the threaded sleeve 2042 is slidably sleeved on the reverse thread 2021 of the rotating rod 202; The side of the bin cover 3 is provided with a limiting sleeve 301, two positioning grooves 302 are formed in the limiting sleeve 301, and the two positioning grooves 302 are symmetrically distributed in an up-down mode, the clamping groove of the limiting sleeve 301 corresponds to the rotating rod 202, the clamping block 2043 of the adjusting frame 204 is clamped with the positioning groove 302, in the application, the rotating rod 202 is driven to rotate through the knob 2022, the reverse thread 2021 of the rotating rod 202 and the threaded sleeve 2042 are matched with each other, and the two adjusting frames 204 can be simultaneously driven to adjust to the middle, the clamping block 2043 is clamped with the positioning groove 302, and the elastic effect of the first compression spring 2032 is utilized, so that the ratchet claw 2031 is clamped with the ratchet groove 2012, and the locking of the bin cover 3 can be quickly completed.

[0025] In the embodiment, as shown in the figure, Figures 5 to 8 The top of the fixed seat 4 is provided with a limiting frame 401, a groove 402 is arranged at the middle position of the limiting frame 401, a servo motor 403 is arranged at the bottom of the front side of the limiting frame 401, a rotating shaft 404 is arranged on the servo motor 403, the rotating shaft 404 is rotatably connected with the limiting frame 401 through a bearing frame, and a gear 405 is arranged on the rotating shaft 404. The bottom of the moving frame 5 is provided with a limiting plate 501, a toothed plate 502 is arranged at the middle position of the bottom of the limiting plate 501, the moving frame 5 is slidably connected with the limiting frame 401 of the fixed seat 4 through the limiting plate 501, the toothed plate 502 is meshingly connected with the gear 405, a guide groove 503 is arranged at the middle position of the top of the moving frame 5, a second chamfer 504 is arranged at the front edge of the guide groove 503, and a slot 505 is formed in the bottom wall close to the front end of the guide groove 503. The bottom of the toothed plate 502 is provided with a mounting block 5021, first chamfers 5022 are formed in the front and rear edges of the mounting block 5021, and a stop block 5023 is arranged at the front of the mounting block 5021. The positioning assembly 6 comprises a fixed plate 601, a positioning block 602, a limiting column 603, a tension spring 604 and a support plate 605, the fixed plate 601 is arranged in a left-right symmetrical mode, the positioning block 602 is arranged between the two fixed plates 601, the limiting column 603 is arranged at the bottom of the fixed plate 601, the tension spring 604 is sleeved on the limiting column 603, the support plate 605 is arranged on the left and right sides of the positioning block 602, the limiting column 603 slidably penetrates through the support plate 605, the ends of the tension spring 604 are connected with the support plate 605 and the fixed plate 601 respectively, the positioning block 602 corresponds to the mounting block 5021, and the moving frame 5 is driven to slide along the limiting frame 401 by the power provided by the servo motor 403 through the meshing transmission of the gear 405 and the toothed plate 502, the patient is pushed into the transfer bin body 2 by the control bed plate 7, and the moving frame 5 is effectively positioned after reaching the specified position in the transfer bin body 2 through the mutual cooperation of the second chamfer 504 of the mounting block 5021 and the positioning block 602.

[0026] In the second embodiment, on the basis of the first embodiment, as shown in Figure 9 and Figure 10 The top of the bed plate 7 is provided with a mattress 701, the bottom of the bed plate 7 is provided with a guide block 702, and the bed plate 7 is slidably connected with the guide groove 503 of the moving frame 5 through the guide block 702, the bottom of the bed plate 7 is provided with a limiting sleeve frame 703, and the limiting sleeve frame 703 is slidably installed with an insertion block 704; The front and rear sidewalls of the limiting sleeve frame 703 are provided with through grooves 7031, the top of the limiting sleeve frame 703 is provided with a fixed block 7032, the bottom of the fixed block 7032 is provided with an insertion rod 7033, and the insertion rod 7033 is sleeved with a second compression spring 7034; The front and rear sides of the insertion block 704 are provided with sliding blocks 7041, the top of the insertion block 704 is provided with an insertion hole 7042, the insertion block 704 is slidably connected with the through grooves 7031 through the sliding blocks 7041, the insertion rod 7033 is slidably inserted into the insertion hole 7042, the second compression spring 7034 is supported between the insertion block 704 and the fixed block 7032, the insertion block 704 corresponds to the insertion groove 505, and the insertion block 704 is separated from the insertion groove 505 by upward pushing the insertion block 704, the insertion rod 7033 is slidably inserted into the insertion hole 7042, the bed plate 7 is pulled forward along the guide groove 503, and the bed plate 7 can be quickly disassembled.

[0027] The working principle of the embodiment is as follows: in use, the rotating rod 202 is driven to rotate through the knob 2022, the reverse thread 2021 of the rotating rod 202 is matched with the threaded sleeve 2042, two adjusting frames 204 are simultaneously adjusted to the middle, the clamping block 2043 is clamped with the positioning groove 302, the elastic action of the first compression spring 2032 is utilized, the ratchet pawl 2031 is clamped with the ratchet groove 2012, the locking of the warehouse cover 3 is quickly completed, the moving frame 5 is driven to slide forward and backward along the limiting frame 401 through the meshing transmission of the gear 405 and the toothed plate 502, the patient is pushed into the transfer warehouse body 2 by the bed plate 7, the second chamfer 504 of the mounting block 5021 is matched with the positioning block 602, the moving frame 5 is effectively positioned after reaching the specified position in the transfer warehouse body 2, the insertion block 704 is separated from the insertion groove 505 by upward pushing the insertion block 704, the insertion rod 7033 is slidably inserted into the insertion hole 7042, the bed plate 7 is pulled forward along the guide groove 503, and the bed plate 7 can be quickly disassembled.

[0028] The embodiments of the present application are presented by way of example and description, and are not intended to be exhaustive or to limit the application to the form disclosed. Many modifications and variations will be apparent to those skilled in the art. Embodiments are chosen and described in order to best explain the principles of the application and its practical application, and to thereby enable others skilled in the art to best utilize the application in various embodiments and with various modifications as are suited to the particular use contemplated.

Claims

1. A patient transfer ward for use in high-altitude areas, characterized in that, include: A base (1) is provided with a transfer compartment (2) on top of the base (1); a compartment cover (3) is provided at the front of the transfer compartment (2), and the compartment cover (3) is hinged to the transfer compartment (2) via a hinge shaft; a fixed seat (4) is provided inside the transfer compartment (2); a movable frame (5) is provided on the top of the fixed seat (4); a positioning component (6) is provided on the fixed seat (4); and a bed board (7) is provided on the top of the movable frame (5). The base (1) has four wheels (101) at the bottom, a cabinet (102) is provided on the right side of the base (1), a control panel (103) is provided on the top of the cabinet (102), and the control panel (103) is located on the right side of the transfer compartment (2).

2. The patient transfer ward for high-altitude areas according to claim 1, characterized in that, The transfer chamber (2) has a connecting frame (201) on the right side of the front port. A rotating rod (202) is rotatably mounted on the connecting frame (201) through a damping sleeve. A spline sleeve (203) is provided on the rotating rod (202). Two adjustment frames (204) are provided on the connecting frame (201), and the two adjustment frames (204) are distributed in a symmetrical manner.

3. A patient transfer ward for high-altitude areas according to claim 2, characterized in that, The connecting frame (201) is provided with two limiting grooves (2011) and a ratchet groove (2012) is provided on the top of the connecting frame (201). The outer circumferential surface of the rotating rod (202) is provided with two reverse threads (2021), and the two reverse threads (2021) are distributed in a symmetrical manner from top to bottom. The top of the rotating rod (202) is provided with a knob (2022), and a spline shaft (2023) is provided at the connection between the rotating rod (202) and the knob (2022). The bottom of the spline sleeve (203) is provided with a ratchet pawl (2031), and the spline sleeve (203) is provided with a first compression spring (2032). The spline sleeve (203) is slidably fitted onto the spline shaft (2023), and the ratchet pawl (2031) matches the ratchet groove (2012). The first compression spring (2032) is supported between the spline sleeve (203) and the knob (2022). A limiting block (2041) is provided on one side of the adjusting frame (204), a threaded sleeve (2042) is provided in the middle of the adjusting frame (204), and a clamping block (2043) is provided on the other side of the adjusting frame (204). The limiting block (2041) is slidably connected to the connecting frame (201) through the limiting groove (2011), and the threaded sleeve (2042) is slidably fitted onto the reverse thread (2021) of the rotating rod (202).

4. A patient transfer ward for high-altitude areas according to claim 1, characterized in that, The cover (3) is provided with a limiting sleeve (301) on one side. The limiting sleeve (301) has two positioning grooves (302) and the two positioning grooves (302) are distributed symmetrically in the upper and lower positions. The groove of the limiting sleeve (301) corresponds to the rotating rod (202), and the clamping block (2043) of the adjusting frame (204) is engaged with the positioning groove (302).

5. A patient transfer ward for high-altitude areas according to claim 1, characterized in that, The fixed base (4) is provided with a limiting frame (401) at the top, a groove (402) in the middle of the limiting frame (401), a servo motor (403) at the bottom front side of the limiting frame (401), a rotating shaft (404) on the servo motor (403), and the rotating shaft (404) is rotatably connected to the limiting frame (401) through a bearing frame, and a gear (405) on the rotating shaft (404).

6. A patient transfer ward for high-altitude areas according to claim 1, characterized in that, The bottom of the movable frame (5) is provided with a limiting plate (501), and a toothed plate (502) is provided at the middle position of the bottom of the limiting plate (501). The movable frame (5) is slidably connected to the limiting frame (401) of the fixed seat (4) through the limiting plate (501), and the toothed plate (502) is meshed with the gear (405). The top middle position of the movable frame (5) is provided with a guide groove (503), and the front edge of the guide groove (503) is provided with a second chamfer (504). The guide groove (503) is provided with a slot (505) near the bottom wall of the front end.

7. A patient transfer ward for high-altitude areas according to claim 6, characterized in that, The toothed plate (502) has a mounting block (5021) at the bottom near the front end. The mounting block (5021) has a first chamfer (5022) at both ends of its front and rear edges, and a stop block (5023) at the front of its mounting block (5021).

8. A patient transfer ward for high-altitude areas according to claim 1, characterized in that, The positioning component (6) includes a fixed plate (601), a positioning block (602), a limiting post (603), a tension spring (604), and a support plate (605). The fixed plate (601) is distributed in two symmetrical positions. The positioning block (602) is provided between the two fixed plates (601). The bottom of the fixed plate (601) is provided with a limiting post (603). The tension spring (604) is fitted on the limiting post (603). The positioning block (602) is provided with support plates (605) on both sides. The limiting post (603) slides through the support plate (605). The two ends of the tension spring (604) are connected to the support plate (605) and the fixed plate (601) respectively. The positioning block (602) corresponds to the mounting block (5021).

9. A patient transfer ward for high-altitude areas according to claim 1, characterized in that, The bed board (7) is provided with a mattress (701) on top and a guide block (702) on the bottom. The bed board (7) is slidably connected to the guide groove (503) of the moving frame (5) through the guide block (702). The bed board (7) is provided with a limiting sleeve (703) at the bottom. An insert (704) is slidably installed inside the limiting sleeve (703).

10. A patient transfer ward for high-altitude areas according to claim 9, characterized in that... The limiting sleeve (703) has through grooves (7031) on the front and rear side walls, a fixing block (7032) on the top of the limiting sleeve (703), an insert rod (7033) on the bottom of the fixing block (7032), and a second compression spring (7034) on the insert rod (7033). The insert (704) has sliders (7041) on both the front and rear sides, and a socket (7042) on the top of the insert (704). The insert (704) is slidably connected to the through groove (7031) through the sliders (7041), and the insert rod (7033) is slidably inserted into the socket (7042). The second compression spring (7034) is supported between the insert (704) and the fixing block (7032), and the insert (704) corresponds to the slot (505).

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