Operating room debridement nursing device

Abstract

The utility model relates to the technical field of medical instruments, and discloses an operating room debridement nursing device which comprises a bottom plate, first limiting rods are fixedly connected to the periphery of the upper surface of the bottom plate, and sleeves are movably connected to the upper sides of the outer surfaces of the first limiting rods in a sleeved mode. By arranging the first limiting rod, the sleeve, the double-thread threaded rod, the moving blocks and the first connecting rod, when an operator rotates the rotary handle, the double-thread threaded rod starts to rotate, and due to rotation of the double-thread threaded rod, the two moving blocks start to move oppositely under limiting of the second limiting rod; in this way, two first connecting rods start to rotate with the left ends of two moving blocks as the axes, movement of the two first connecting rods enables two second connecting rods to start to rotate, in the process, the other ends of the two second connecting rods pull a moving plate, and the whole moving plate starts to move downwards under limiting of first limiting rods; this causes a change in the distance between the base plate and the moving plate.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and more specifically, to an operating room debridement and nursing device. Background Art

[0002] When a patient encounters an accident that causes a large area of ​​necrosis or infection in the patient's body surface or muscle tissue, medical staff need to clean the necrotic or infected tissue while ensuring that the patient's vital signs are basically stable. This prevents infection from occurring at the patient's wound by removing the inactive tissue at the wound. At the same time, the wound is exposed to medical staff to facilitate their assessment of the patient's injury and provide a medical plan for the patient.

[0003] When medical staff perform debridement on patients in the operating room, they often use an operating room debridement care device to remove necrotic or contaminated tissue from the patient's wound, thereby ensuring that the patient's wound will not become seriously infected. In actual use, although the existing operating room debridement care device has basic care functions, the height of the existing debridement care device is generally not adjustable, which makes it inconvenient for medical workers of different heights to take the debridement tools, affecting the efficiency of the debridement surgery, and therefore needs to be improved. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides an operating room debridement and nursing device, which has the advantage of being height-adjustable.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: an operating room debridement nursing device, comprising:

[0006] A bottom plate, wherein a first limiting rod is fixedly connected to the four sides of the upper surface of the bottom plate, a sleeve is movably sleeved on the upper side of the outer surface of the first limiting rod, and a movable plate is fixedly connected to the upper surface of the sleeve;

[0007] A fixing plate, the lower surface of which is fixedly connected to the upper surface of the bottom plate, and a second limiting rod is fixedly connected to the right side of the inner surface of the fixing plate;

[0008] An adjustment mechanism, the adjustment mechanism being arranged on the left side of the second limiting rod;

[0009] A rotation locking mechanism, wherein the rotation locking mechanism is arranged on the rear side of the fixing plate;

[0010] Among them, the adjustment mechanism includes a double-threaded rod, the front end of the double-threaded rod is movably connected to the left side of the top end of the front surface of the fixed plate, the other end of the double-threaded rod penetrates the fixed plate and extends to the rear of the fixed plate and is fixedly connected with a rotating handle, the front and rear sides of the outer surface of the double-threaded rod are threadedly sleeved with moving blocks, the number of the moving blocks is two, the inner surfaces on the right sides of the two moving blocks are movably sleeved with the outer surface of the No. 2 limit rod, the left surfaces of the two moving blocks are hinged to a No. 1 connecting rod, the other end of the No. 1 connecting rod is hinged to a No. 2 connecting rod, and the other end of the No. 2 connecting rod is hinged to the middle part of the lower surface of the moving plate, the double-threaded rod rotates to make the moving block drive the No. 1 connecting rod and the No. 2 connecting rod to rotate and pull the moving plate down as a whole.

[0011] As a preferred technical solution of the utility model, the rotation locking mechanism includes:

[0012] A connecting block, the rear surface of which is fixedly connected to the right side of the outer surface of the fixing plate, the connecting block is located below the double-threaded rod, and the upper surface of the connecting block is fixedly connected to a No. 1 spring;

[0013] A locking block, wherein the locking block is movably connected to the outer surface of the fixed plate, the rear end of the locking block passes through the fixed plate and extends to the interior of the fixed plate, the lower surface of the locking block is fixedly connected to the upper end of the No. 1 spring, the outer surface of the locking block is meshed with a gear, and the inner surface of the gear is fixedly sleeved with the outer surface of the double-threaded rod.

[0014] As a preferred technical solution of the utility model, the upper surface of the base plate is fixedly connected to a liquid box, the left surface of the liquid box and the right surface of the fixed plate are fixedly connected, a valve is fixedly installed in the middle of the upper surface of the liquid box, the bottom end of the valve penetrates the liquid box and extends to the interior of the liquid box, the front side of the left end of the inner surface of the liquid box is fixedly connected to a liquid extraction port, the left end of the liquid extraction port penetrates the liquid box and extends to the left surface of the liquid box and is fixedly connected to a liquid pump, and the top end of the outer surface of the liquid pump is fixedly connected to a liquid outlet.

[0015] As a preferred technical solution of the utility model, a hose is fixedly connected to the upper surface of the liquid outlet, and the other end of the hose passes through the movable plate and extends to the upper surface of the movable plate and is fixedly connected to a nozzle.

[0016] As a preferred technical solution of the utility model, a debridement box is fixedly connected to the left side of the lower surface of the movable plate, a trash can located directly below the debridement box is movably connected to the left side of the upper surface of the base plate, and universal wheels are movably installed around the lower surface of the base plate.

[0017] As a preferred technical solution of the utility model, the left side of the upper surface of the movable plate is fixedly connected to a fixed splint located on the front side of the debridement box, the left surface of the fixed splint is movably connected to the movable splint, the bottom end of the right surface of the movable splint is fixedly connected to a movable bar, the right end of the movable bar passes through the fixed splint and extends to the right side of the fixed splint, and the outer surface of the movable bar and the inner surface of the fixed splint are movably connected.

[0018] As a preferred technical solution of the present invention, a connecting plate located on the rear side of the moving bar is fixedly connected to the middle part of the upper surface of the moving plate, and a fixing pin located above the moving bar is movably connected to the upper surface of the connecting plate, and a pull handle is fixedly connected to the top of the fixing pin, and the bottom end of the fixing pin passes through the moving bar and the moving plate in sequence and extends to the interior of the moving plate and is movably connected to the inner surfaces of the moving plate and the moving bar, and a No. 2 spring is movably sleeved on the outer surface of the fixing pin, and the bottom end of the No. 2 spring is fixedly connected to the upper surface of the connecting plate, and the top end of the No. 2 spring is fixedly connected to the lower surface of the pull handle.

[0019] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0020] 1. The utility model provides a No. 1 limit rod, a sleeve, a double-threaded rod, a moving block and a No. 1 connecting rod. When the operator rotates the handle, the double-threaded rod will start to rotate. Due to the rotation of the double-threaded rod, the two moving blocks start to move away from each other under the limit of the No. 2 limit rod, which makes the two No. 1 connecting rods start to rotate with the left ends of the two moving blocks as the axis respectively, and the movement of the two No. 1 connecting rods will make the two No. 2 connecting rods start to rotate. In this process, the other ends of the two No. 2 connecting rods will pull the moving plate, so that the moving plate as a whole starts to move downward under the limit of the No. 1 limit rod, which changes the spacing between the bottom plate and the moving plate, so that the operator can adjust the overall height of the bottom plate and the moving plate according to his own height, which provides convenience for the operator to take the debridement tools.

[0021] 2. The utility model provides a fixed splint, a movable splint, a movable bar, a fixed pin and a pull handle. When the operator lifts the pull handle and causes the fixed pin to disengage from the inner surface of the movable bar, the fixation of the movable bar is released. At this time, the operator pulls the movable splint to move it to the left under the limit of the movable bar, and places the patient's affected limb between the fixed splint and the movable splint. Then, the movable splint is reset and the pull handle is released so that the fixed pin is reset under the elastic force of the No. 2 spring. At this time, the movable bar and the movable splint are re-fixed, and the patient's affected limb is also fixed between the fixed splint and the movable splint, thereby preventing the patient from moving the affected limb due to pain during debridement, which would affect the medical staff's debridement of the patient. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1It is a schematic diagram of the structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the back structure of the utility model;

[0024] Figure 3 It is a cross-sectional structural schematic diagram of the side of the utility model;

[0025] Figure 4 It is a cross-sectional structural schematic diagram of the utility model;

[0026] Figure 5 It is a cross-sectional structural schematic diagram of the liquid pump of the utility model;

[0027] Figure 6 This is a structural schematic diagram of the locking block of the utility model;

[0028] Figure 7 for Figure 1 Schematic diagram of the local enlarged structure at point A in the middle.

[0029] In the figure: 1. bottom plate; 2. No. 1 limit rod; 3. sleeve; 4. moving plate; 5. fixed plate; 6. No. 2 limit rod; 7. double-threaded rod; 8. moving block; 9. No. 1 connecting rod; 10. No. 2 connecting rod; 11. rotating handle; 12. connecting block; 13. No. 1 spring; 14. locking block; 15. gear; 16. liquid box; 17. valve; 18. liquid extraction port; 19. liquid pump; 20. liquid outlet; 21. hose; 22. nozzle; 23. debridement box; 24. trash can; 25. universal wheel; 26. fixed splint; 27. moving splint; 28. moving strip; 29. ​​connecting plate; 30. fixing pin; 31. pull handle; 32. No. 2 spring. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] like Figures 1 to 7 As shown, the utility model provides an operating room debridement nursing device, comprising:

[0032] A bottom plate 1, a first limiting rod 2 is fixedly connected to the four sides of the upper surface of the bottom plate 1, a sleeve 3 is movably sleeved on the upper side of the outer surface of the first limiting rod 2, and a movable plate 4 is fixedly connected to the upper surface of the sleeve 3;

[0033] A fixing plate 5, the lower surface of the fixing plate 5 is fixedly connected to the upper surface of the bottom plate 1, and a second limiting rod 6 is fixedly connected to the right side of the inner surface of the fixing plate 5;

[0034] An adjustment mechanism is arranged on the left side of the second limiting rod 6;

[0035] A rotation locking mechanism, which is arranged on the rear side of the fixing plate 5;

[0036] Among them, the adjustment mechanism includes a double-threaded rod 7, the front end of the double-threaded rod 7 is movably connected to the left side of the top end of the front surface of the fixed plate 5, the other end of the double-threaded rod 7 penetrates the fixed plate 5 and extends to the rear of the fixed plate 5 and is fixedly connected with a rotary handle 11, the front and rear sides of the outer surface of the double-threaded rod 7 are threadedly sleeved with moving blocks 8, the number of moving blocks 8 is two, the inner surfaces of the right sides of the two moving blocks 8 are movably sleeved with the outer surface of the No. 2 limit rod 6, the left surfaces of the two moving blocks 8 are hinged to a No. 1 connecting rod 9, the other end of the No. 1 connecting rod 9 is hinged to a No. 2 connecting rod 10, the other end of the No. 2 connecting rod 10 is hinged to the middle part of the lower surface of the moving plate 4, the double-threaded rod 7 rotates to make the moving block 8 drive the No. 1 connecting rod 9 and the No. 2 connecting rod 10 to rotate and pull the moving plate 4 down as a whole.

[0037] When the operator starts to rotate the double-threaded rod 7 as a whole, the two moving blocks 8 will start to move away from each other under the limit of the No. 2 limit rod 6, which makes the two No. 1 connecting rods 9 start to rotate with the left ends of the two moving blocks 8 as the axis, and the movement of the two No. 1 connecting rods 9 will make the two No. 2 connecting rods 10 start to rotate. In this process, the other ends of the two No. 2 connecting rods 10 will pull the moving plate 4 as a whole to make it start to move downward, so that the distance between the bottom plate 1 and the moving plate 4 will gradually decrease.

[0038] Wherein, the rotation locking mechanism includes:

[0039] A connecting block 12, the rear surface of the connecting block 12 is fixedly connected to the right side of the outer surface of the fixing plate 5, the connecting block 12 is located below the double-threaded rod 7, and the upper surface of the connecting block 12 is fixedly connected to a spring No. 13;

[0040] The locking block 14 is movably connected to the outer surface of the fixed plate 5, the rear end of the locking block 14 penetrates the fixed plate 5 and extends to the inside of the fixed plate 5, the lower surface of the locking block 14 is fixedly connected to the upper end of the No. 1 spring 13, the outer surface of the locking block 14 is meshedly connected with a gear 15, and the inner surface of the gear 15 is fixedly sleeved with the outer surface of the double-threaded rod 7.

[0041] Due to the design of the locking block 14, the overall rotation of the gear 15 and the double-threaded rod 7 is locked. When the operator pulls the locking block 14 downward and disengages the locking block 14 from the engagement with the outer surface of the gear 15, the overall rotation lock of the gear 15 and the double-threaded rod 7 is released. At this time, the operator can adjust the distance between the base plate 1 and the movable plate 4 by rotating the handle 11.

[0042] Among them, a liquid box 16 is fixedly connected to the upper surface of the base plate 1, the left surface of the liquid box 16 and the right surface of the fixed plate 5 are fixedly connected, a valve 17 is fixedly installed in the middle of the upper surface of the liquid box 16, the bottom end of the valve 17 penetrates the liquid box 16 and extends to the inside of the liquid box 16, a liquid extraction port 18 is fixedly connected to the front side of the left end of the inner surface of the liquid box 16, the left end of the liquid extraction port 18 penetrates the liquid box 16 and extends to the left surface of the liquid box 16 and is fixedly connected to a liquid pump 19, and the top end of the outer surface of the liquid pump 19 is fixedly connected to a liquid outlet 20.

[0043] When the liquid pump 19 is running, the cleaning liquid in the liquid tank 16 will be pumped into the liquid pump port 18 and enter the liquid pump 19 to be pressurized, and then discharged from the liquid outlet 20 .

[0044] A hose 21 is fixedly connected to the upper surface of the liquid outlet 20 , and the other end of the hose 21 penetrates the movable plate 4 and extends to the upper surface of the movable plate 4 and is fixedly connected to a nozzle 22 .

[0045] Due to the design of the nozzle 22, the operator can clean the wound of the patient.

[0046] Among them, a debridement box 23 is fixedly connected to the left side of the lower surface of the movable plate 4, a trash can 24 located directly below the debridement box 23 is movably connected to the left side of the upper surface of the bottom plate 1, and universal wheels 25 are movably installed around the lower surface of the bottom plate 1.

[0047] Due to the design of the universal wheel 25 , the operator can move the base plate 1 and the movable plate 4 as a whole.

[0048] Among them, the left side of the upper surface of the movable plate 4 is fixedly connected to a fixed splint 26 located on the front side of the debridement box 23, the left surface of the fixed splint 26 is movably connected to a movable splint 27, the bottom end of the right surface of the movable splint 27 is fixedly connected to a movable bar 28, the right end of the movable bar 28 passes through the fixed splint 26 and extends to the right side of the fixed splint 26, the outer surface of the movable bar 28 and the inner surface of the fixed splint 26 are movably connected.

[0049] Due to the design of the fixed splint 26 and the movable splint 27, the operator can simply fix the patient's affected limb to prevent the patient from moving the affected limb due to excessive pain during debridement, which would affect the medical staff's debridement of the patient.

[0050] Among them, the middle part of the upper surface of the moving plate 4 is fixedly connected with a connecting plate 29 located on the rear side of the moving bar 28, the upper surface of the connecting plate 29 is movably connected with a fixing pin 30 located above the moving bar 28, the top of the fixing pin 30 is fixedly connected with a pull handle 31, the bottom end of the fixing pin 30 passes through the moving bar 28 and the moving plate 4 in sequence and extends to the interior of the moving plate 4 and is movably connected with the inner surfaces of the moving plate 4 and the moving bar 28, the outer surface of the fixing pin 30 is movably sleeved with a No. 2 spring 32, the bottom end of the No. 2 spring 32 is fixedly connected to the upper surface of the connecting plate 29, and the top of the No. 2 spring 32 is fixedly connected to the lower surface of the pull handle 31.

[0051] When the operator lifts the handle 31 and causes the fixing pin 30 to disengage from the inner surface of the movable bar 28 , the fixation of the movable bar 28 is released, allowing the operator to pull the movable splint 27 to move to the left, making it easier for the operator to place the patient's affected limb between the fixing splint 26 and the movable splint 27 .

[0052] The working principle and use process of this utility model:

[0053] First, the operator pulls down the locking block 14 until the locking block 14 is disengaged from the outer surface of the gear 15. At this time, the rotation lock of the gear 15 and the double-threaded rod 7 as a whole is released. Then the operator rotates the handle 11 to make the double-threaded rod 7 start to rotate. At this time, the two moving blocks 8 will move in opposite directions under the limit of the No. 2 limit rod 6, which will cause the two No. 1 connecting rods 9 to start rotating with the left ends of the two moving blocks 8 as the axis, and the two No. 2 connecting rods 10 will start to rotate driven by the two No. 1 connecting rods 9. During this process, the other ends of the two No. 2 connecting rods 10 will pull the movable plate 4 as a whole and make it start to move downward under the limit of the outer surface of the No. 1 limit rod 2, which gradually reduces the distance between the base plate 1 and the movable plate 4. When the overall height of the base plate 1 and the movable plate 4 is convenient for the operator to take, the operator releases the locking block 14, and the locking block 14 will be reset under the elastic force of the No. 1 spring 13, which locks the rotation of the gear 15 and the double-threaded rod 7, ensuring that the overall height between the base plate 1 and the movable plate 4 will not change.

[0054] At this time, the operator lifts the pull handle 31 until the fixing pin 30 leaves the inner surface of the movable bar 28, which releases the fixation of the movable bar 28. At this time, the operator pulls the movable splint 27 to move it to the left and places the patient's affected limb on the inner surface of the fixing splint 26, and then pushes the movable splint 27 to the right to reset the movable splint 27 and the movable bar 28 and release the pull handle 31. At this time, under the elastic force of the No. 2 spring 32, the fixing pin 30 will be reinserted into the interior of the movable bar 28, so that the movable bar 28 and the movable splint 27 are fixed. In this process, the patient's affected limb is also simply fixed between the fixing splint 26 and the inner surface of the movable splint 27, which ensures that the patient's affected limb will not move significantly during the debridement period, ensures that the patient's wound will not collide with other debridement tools due to movement during the debridement period and cause secondary injury, and also ensures the efficiency of the medical staff in performing the debridement operation.

[0055] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An operating room debridement and nursing device, characterized in that: Included are: A bottom plate (1), wherein a first limiting rod (2) is fixedly connected to the four sides of the upper surface of the bottom plate (1), a sleeve (3) is movably sleeved on the upper side of the outer surface of the first limiting rod (2), and a movable plate (4) is fixedly connected to the upper surface of the sleeve (3); A fixing plate (5), wherein the lower surface of the fixing plate (5) is fixedly connected to the upper surface of the bottom plate (1), and a second limiting rod (6) is fixedly connected to the right side of the inner surface of the fixing plate (5); An adjustment mechanism, the adjustment mechanism being arranged on the left side of the second limiting rod (6); A rotation locking mechanism, wherein the rotation locking mechanism is arranged on the rear side of the fixing plate (5); The adjustment mechanism comprises a double-threaded rod (7), the front end of the double-threaded rod (7) is movably connected to the left side of the top end of the front surface of the fixed plate (5), the other end of the double-threaded rod (7) passes through the fixed plate (5) and extends to the rear of the fixed plate (5) and is fixedly connected to a rotary handle (11), and the front and rear sides of the outer surface of the double-threaded rod (7) are both threadedly sleeved with moving blocks (8), and the number of the moving blocks (8) is two, and the two moving blocks (8) ) are movably sleeved with the outer surface of the No. 2 limit rod (6), the left surfaces of the two moving blocks (8) are hinged with the No. 1 connecting rod (9), the other end of the No. 1 connecting rod (9) is hinged with the No. 2 connecting rod (10), the other end of the No. 2 connecting rod (10) is hinged with the middle part of the lower surface of the moving plate (4), and the double-threaded rod (7) rotates to make the moving block (8) drive the No. 1 connecting rod (9) and the No. 2 connecting rod (10) to rotate and pull the moving plate (4) to descend as a whole.

2. The operating room debridement and nursing device according to claim 1, characterized in that: The rotation locking mechanism comprises: A connecting block (12), wherein the rear surface of the connecting block (12) is fixedly connected to the right side of the outer surface of the fixing plate (5), the connecting block (12) is located below the double-threaded rod (7), and the upper surface of the connecting block (12) is fixedly connected to a No. 1 spring (13); A locking block (14), wherein the locking block (14) is movably connected to the outer surface of the fixing plate (5), the rear end of the locking block (14) passes through the fixing plate (5) and extends to the inside of the fixing plate (5), the lower surface of the locking block (14) is fixedly connected to the upper end of the first spring (13), the outer surface of the locking block (14) is meshedly connected with a gear (15), and the inner surface of the gear (15) is fixedly sleeved with the outer surface of the double-threaded rod (7).

3. The operating room debridement and nursing device according to claim 1, characterized in that: The upper surface of the bottom plate (1) is fixedly connected to a liquid box (16); the left surface of the liquid box (16) is fixedly connected to the right surface of the fixed plate (5); a valve (17) is fixedly installed in the middle of the upper surface of the liquid box (16); the bottom end of the valve (17) penetrates the liquid box (16) and extends to the inside of the liquid box (16); the front side of the left end of the inner surface of the liquid box (16) is fixedly connected to a liquid extraction port (18); the left end of the liquid extraction port (18) penetrates the liquid box (16) and extends to the left surface of the liquid box (16) and is fixedly connected to a liquid pump (19); the top end of the outer surface of the liquid pump (19) is fixedly connected to a liquid outlet (20).

4. The operating room debridement and nursing device according to claim 3, characterized in that: A hose (21) is fixedly connected to the upper surface of the liquid outlet (20); the other end of the hose (21) penetrates the movable plate (4) and extends to the upper surface of the movable plate (4) and is fixedly connected to a spray head (22).

5. The operating room debridement and nursing device according to claim 1, characterized in that: A debridement box (23) is fixedly connected to the left side of the lower surface of the movable plate (4), a trash can (24) located directly below the debridement box (23) is movably connected to the left side of the upper surface of the base plate (1), and universal wheels (25) are movably installed around the lower surface of the base plate (1).

6. The operating room debridement and nursing device according to claim 1, characterized in that: The left side of the upper surface of the movable plate (4) is fixedly connected to a fixed splint (26) located on the front side of the debridement box (23); the left surface of the fixed splint (26) is movably connected to a movable splint (27); the bottom end of the right surface of the movable splint (27) is fixedly connected to a movable bar (28); the right end of the movable bar (28) passes through the fixed splint (26) and extends to the right side of the fixed splint (26); the outer surface of the movable bar (28) and the inner surface of the fixed splint (26) are movably connected.

7. The operating room debridement and nursing device according to claim 1, characterized in that: The middle part of the upper surface of the movable plate (4) is fixedly connected with a connecting plate (29) located at the rear side of the movable bar (28); the upper surface of the connecting plate (29) is movably connected with a fixing pin (30) located above the movable bar (28); the top end of the fixing pin (30) is fixedly connected with a pull handle (31); the bottom end of the fixing pin (30) passes through the movable bar (28) and the movable plate (4) in sequence and extends to the interior of the movable plate (4) and is movably connected with the inner surfaces of the movable plate (4) and the movable bar (28); the outer surface of the fixing pin (30) is movably sleeved with a No. 2 spring (32); the bottom end of the No. 2 spring (32) is fixedly connected to the upper surface of the connecting plate (29); the top end of the No. 2 spring (32) is fixedly connected to the lower surface of the pull handle (31).

Images