Special thoracotomy auxiliary device for clinical operation of thoracic surgery department

Abstract

The invention discloses a special thoracotomy auxiliary device for thoracic surgery clinical operation, and relates to the technical field of medical instruments, the special thoracotomy auxiliary device comprises a bottom plate, the upper side of the bottom plate is fixedly connected with a supporting rod, the upper side of the bottom plate is provided with a mounting hole, the upper end of the supporting rod is fixedly connected with a fixing plate, and the front side of the fixing plate is provided with a distraction unit; a top cover is fixedly connected to the upper side of the fixing plate, the opening unit comprises a sliding groove, the sliding groove is formed in the front side of the fixing plate, two symmetrically-distributed sliding blocks are slidably connected to the inner side of the sliding groove, and moving plates are fixedly connected to the front sides of the two sliding blocks. According to the special thoracotomy auxiliary device for the clinical operation of the thoracic surgery department, by arranging the bottom plate, the fixing plate, the distraction plates, the first screw rod and the first inclined plate, the two distraction plates can be conveniently controlled to distraction the thoracic cavity of a patient, the side plates on the two sides are controlled to clamp the periphery of the thoracic cavity, the distraction friction force between the distraction plates and ribs is increased, and the situation that the distraction plates slide to affect the progress of the operation is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a thoracotomy auxiliary device dedicated to clinical thoracic surgery. Background Art

[0002] Surgical procedures involve a variety of procedures, primarily targeting diseases of the lungs, esophagus, mediastinum, chest wall, and other areas. During surgical procedures, auxiliary devices are required to expand the chest cavity, making it easier for medical personnel to perform surgery inside the chest cavity.

[0003] After searching, the Chinese patent with application number "CN202510200288.5" is specifically a thoracotomy auxiliary device specially used for clinical thoracic surgery, including a base, a transverse displacement seat and a mounting shell. The base is rotatably mounted with symmetrically arranged spreading arms on both sides. The transverse displacement seat is arranged between the base and the mounting shell. A threaded hole is opened in the middle of the base, and a threaded rod is screwed to the inner wall of the threaded hole. One end of the threaded rod is rotatably connected to the outer wall of one side of the transverse displacement seat.

[0004] In the above patent, the expansion arms on both sides are controlled to open by rotating the threaded rod, so as to facilitate the expansion of the patient's chest cavity. When the pleural mucus covering the surface of the patient's ribs or the blood and tissue fluid exuded during the operation will form a lubricating layer, and when used for obese patients, the fat layer of the chest wall will thicken, which will reduce the direct contact area between the expansion arms and the ribs, making the expansion arms easy to slip, requiring medical staff to frequently reposition the device, thereby prolonging the operation time. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the present invention provides a special thoracotomy auxiliary device for clinical thoracic surgery, which solves the problem of slipping and prolonging the operation time when the patient's chest cavity is expanded.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] The cam is secured to the upper edge of the support frame, and the cam is secured to the lower edge of the support frame by a spring, which is adapted to move the cam forwardly and downwardly.

[0008] Preferably, the upper sides of the two sliders are fixedly connected to the top frame, the upper sides of the two top frames are fixedly connected to a rotating block 1, the outer side of the rotating block 1 is rotatably connected to an inclined plate 1, the outer side of the upper end of the inclined plate 1 is rotatably connected to a rotating block 2, the upper side of the rotating block 2 is fixedly connected to a lifting block, the upper side of the fixed plate is rotatably connected to a screw 1, the upper end of the screw 1 passes through the upper side of the top cover and is fixedly connected to a rotating cap 1, a telescopic rod is fixedly connected between the lifting block and the fixed plate, and the screw 1 is threadedly connected to the lifting block.

[0009] Preferably, the reinforcement component includes two mounting grooves, which are opened on the front and rear sides of the support plate. The inner sides of the mounting grooves on the front and rear sides are rotatably connected to rotating rods, and the outer sides of the rotating rods on the front and rear sides are fixedly connected to side plates, and the outer sides of the side plates are fixedly connected to multiple friction blocks.

[0010] Preferably, the upper ends of the two rotating rods pass through the upper side of the movable plate and are fixedly connected to a turntable, the outer side of the turntable is fixedly connected to a control block, the upper sides of the two control blocks are rotatably connected to the control plate, a movable groove is provided on the upper side of the movable plate, the inner side of the movable groove is slidably connected to the movable block, the front and rear sides of the movable block are fixedly connected to side blocks, the outer side of the side block is fixedly connected to a rotating block three, and the rotating block three is rotatably connected to the control plate.

[0011] Preferably, the outer side of the movable plate is fixedly connected to a mounting plate, the outer side of the mounting plate is provided with a lifting rod, the lower end of the lifting rod passes through the lower side of the mounting plate and is fixedly connected to a pressure plate, the upper end of the lifting rod is fixedly connected to a top plate, the outer side of the top plate is fixedly connected to a connecting block 1, the outer side of the connecting block 1 is rotatably connected to an inclined plate 2, the upper side of the side block is fixedly connected to a connecting block 2, and the connecting block 2 is rotatably connected to the inclined plate 2.

[0012] Preferably, two air cylinders are fixedly connected to the upper side of the mounting plate, a piston disc is provided on the inner side of the air cylinder, a control rod is fixedly connected to the upper side of the piston disc, the upper end of the control rod passes through the upper side of the air cylinder and is fixedly connected to the top plate, a spring 1 is fixedly connected between the top plate and the air cylinder, a connecting pipe is fixedly connected between the two air cylinders, the front side of the top cover is fixedly connected to the air box, a piston plate is provided on the inner side of the air box, a spring 2 is fixedly connected between the outer side of the piston plate and the inner wall of the air box, a delivery pipe is fixedly connected between the air box and the connecting pipe, the outer sides of the two top frames are fixedly connected to mounting blocks, a sliding rod is provided on the outer side of the mounting block, and the end of the sliding rod close to the air box is fixedly connected to a push plate.

[0013] Preferably, the outer side of the push plate is rotatably connected to a second screw rod, the other end of the second screw rod passes through the outer side of the mounting block and is fixedly connected to a second rotating cap, and the second screw rod is threadedly connected to the mounting block.

[0014] Beneficial effects

[0015] The present invention provides a thoracotomy assist device specifically for clinical thoracic surgery. Compared with the prior art, it has the following advantages:

[0016] (1) This thoracotomy auxiliary device for clinical thoracic surgery is equipped with a base plate, a fixing plate, an expansion plate, a screw rod, and an inclined plate. It is convenient to control the two expansion plates to expand the patient's chest cavity, and control the side plates on both sides to clamp the chest cavity, thereby increasing the expansion friction between the expansion plates and the ribs, and preventing the expansion plates from sliding and affecting the progress of the operation.

[0017] (2) The thoracotomy auxiliary device specially used for clinical thoracic surgery is provided with an air cylinder, an air box, a piston disc, a piston plate, a pressure plate and a lifting rod. When the ribs are expanded, the pressure plate presses down around the patient's ribs, thereby enhancing the expansion stability of the expansion plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the overall three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a three-dimensional structural diagram of the present invention without the top cover;

[0020] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0021] Figure 4 It is a partial three-dimensional structural diagram of the expansion unit in the present invention;

[0022] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0023] Figure 6 for Figure 4 Enlarged view of point C in the middle;

[0024] Figure 7 It is a partially cutaway three-dimensional structural diagram of the support unit in the present invention;

[0025] Figure 8 It is a partially cutaway three-dimensional structural diagram of the present invention;

[0026] Figure 9 for Figure 8 Enlarged view of point D in the middle;

[0027] Figure 10 for Figure 8 Enlarged view of point E in the middle.

[0028] In the figure: 1, bottom plate; 2, mounting hole; 3, support rod; 4, fixed plate; 5, top cover; 6, expansion unit; 61, slide groove; 62, slider; 63, movable plate; 64, expansion plate; 65, through hole; 66, fixed cover; 67, reinforcement assembly; 68, top frame; 69, rotating block 1; 610, inclined plate 1; 611, rotating block 2; 612, lifting block; 613, screw rod 1; 614, rotating cap 1; 615, telescopic rod;

[0029] 671, mounting slot; 672, rotating rod; 673, side plate; 674, friction block; 675, mounting plate; 676, lifting rod; 677, pressure plate; 678, top plate; 679, connecting block 1; 6710, inclined plate 2; 6711, turntable; 6712, control block; 6713, control plate; 6714, moving slot; 6715, moving block; 6716, side block; 6717, Turning block three; 6718, connecting block two; 6719, spring one; 6720, air cylinder; 6721, connecting pipe; 6722, control rod; 6723, piston disc; 6724, air box; 6725, piston plate; 6726, spring two; 6727, delivery pipe; 6728, mounting block; 6729, screw two; 6730, turning cap two; 6731, push plate; 6732, slide rod. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0031] The present invention provides the following technical solutions:

[0032] Example 1

[0033] See also Figures 1-6The support rod 3 is fixedly connected to the upper side of the bottom plate 1, and a mounting hole 2 is provided on the upper side of the bottom plate 1. The upper end of the support rod 3 is fixedly connected to the fixing plate 4. The front side of the fixing plate 4 is provided with a spreading unit 6. The upper side of the fixing plate 4 is fixedly connected to the top cover 5. The spreading unit 6 includes a slide groove 61, which is opened at the front side of the fixing plate 4. The inner side of the slide groove 61 is slidably connected to two symmetrically distributed sliders 62. The front sides of the two sliders 62 are fixedly connected to a moving plate 63. The lower side of the moving plate 63 is fixedly connected to the spreading plate 64. The middle part of the spreading plate 64 is provided with a through hole 65. The upper side of the moving plate 63 is fixedly connected to the fixing cover 66. The outer side of the spreading plate 64 is provided with a reinforcing component 67. The reinforcing component 67 is used to reinforce the spreading plate 64 to prevent the spreading plate 64 from sliding when spreading the chest cavity. The mounting hole 2 on the bottom plate 1 is connected to the operating table, which is convenient for installation of the device.

[0034] The upper sides of the two sliders 62 are fixedly connected to the top frame 68, and the upper sides of the two top frames 68 are fixedly connected to the rotating block 1 69. The outer side of the rotating block 1 69 is rotatably connected to the inclined plate 1 610. The outer side of the upper end of the inclined plate 1 610 is rotatably connected to the rotating block 2 611. The upper side of the rotating block 2 611 is fixedly connected to the lifting block 612. The upper side of the fixed plate 4 is rotatably connected to the screw 1 613. The upper end of the screw 1 613 passes through the upper side of the top cover 5 and is fixedly connected to the rotating cap 1 614. A telescopic rod 615 is fixedly connected between the lifting block 612 and the fixed plate 4. The screw 1 613 and the lifting block 6 12 threaded connection, when expanding the patient's chest cavity, first place the two expansion plates 64 on the chest cavity, rotate the rotating cap 614 to drive the screw 613 to rotate, the screw 613 drives the lifting block 612 to descend, and the lifting block 612 drives the inclined plate 610 to rotate. The two inclined plates 610 are symmetrically distributed, so that the two top frames 68 are away from each other, the top frame 68 drives the slider 62 to move, the slider 62 drives the moving plate 63 to move, and the moving plate 63 drives the expansion plate 64 to move, so that the expansion plates 64 on the left and right sides are away from each other, which is convenient for the expansion plates 64 to expand the patient's chest cavity.

[0035] The reinforcing assembly 67 includes two mounting slots 671, and the two mounting slots 671 are provided on the front and rear sides of the support plate 64. The inner sides of the front and rear mounting slots 671 are rotatably connected to the rotating rods 672, and the outer sides of the front and rear rotating rods 672 are fixedly connected to the side plates 673, and the outer sides of the side plates 673 are fixedly connected to multiple friction blocks 674. The upper ends of the two rotating rods 672 pass through the upper side of the movable plate 63 and are fixedly connected to the rotating disk 6711. The outer side of the rotating disk 6711 is fixedly connected to the control block 6712. The upper sides of the two control blocks 6712 are rotatably connected to the control plate 6713. A movable slot 6714 is provided on the upper side of the movable plate 63. A movable block 6715 is slidably connected to the inner side of the movable slot 6714. The front and rear sides of the movable block 6715 are fixedly connected to the side blocks 6716. The outer side of the side block 6716 is fixedly connected to the rotating block 3 6717. It is rotatably connected to the control plate 6713. When the patient's chest cavity is expanded, under the action of the air box 6724, the delivery tube 6727, and the air cylinder 6720, the top plate 678 is controlled to descend. The top plate 678 drives the inclined plate 2 6710 on the connecting block 1 679 to rotate. The inclined plate 2 6710 drives the side block 6716 on the connecting block 2 6718 to move. The side block 6716 drives the control plate 6713 to rotate. The control plate 6713 drives the turntable 6711 on the control block 6712 to rotate. Since the two control plates 6713 are symmetrically distributed, the two turntables 6711 rotate in opposite directions. The turntable 6711 drives the rotating rod 672 to rotate. The rotating rod 672 drives the side plates 673 to rotate. The side plates 673 approach and contact the ribs, so that the friction blocks 674 on the side plates 673 strengthen the friction between the expansion plate 64 and the ribs, preventing the expansion plate 64 from sliding and increasing the stability of the chest cavity expansion.

[0036] Example 2

[0037] Based on the first embodiment, Figure 7-10As shown, the outer side of the movable plate 63 is fixedly connected to the mounting plate 675, and the outer side of the mounting plate 675 is provided with a lifting rod 676. The lower end of the lifting rod 676 passes through the lower side of the mounting plate 675 and is fixedly connected to the pressing plate 677. The upper end of the lifting rod 676 is fixedly connected to the top plate 678. The outer side of the top plate 678 is fixedly connected to the connecting block 1 679. The outer side of the connecting block 1 679 is rotatably connected to the inclined plate 2 6710. The upper side of the side block 6716 is fixedly connected to the connecting block 2 6718. The connecting block 2 6718 is rotatably connected to the inclined plate 2 6710. The upper side of the mounting plate 675 is fixedly connected to two air cylinders 67 20. A piston disc 6723 is provided on the inner side of the air cylinder 6720. A control rod 6722 is fixedly connected to the upper side of the piston disc 6723. The upper end of the control rod 6722 passes through the upper side of the air cylinder 6720 and is fixedly connected to the top plate 678. A spring 1 6719 is fixedly connected between the top plate 678 and the air cylinder 6720. A connecting pipe 6721 is fixedly connected between the two air cylinders 6720. The front side of the top cover 5 is fixedly connected to the air box 6724. A piston plate 6725 is provided on the inner side of the air box 6724. A spring 2 6726 is fixedly connected between the outer side of the piston plate 6725 and the inner wall of the air box 6724. A delivery pipe 6727 is fixedly connected between the air box 6724 and the connecting pipe 6721. The outer sides of the two top frames 68 are fixedly connected with mounting blocks 6728. A slide bar 6732 is provided on the outer side of the mounting block 6728. A push plate 6731 is fixedly connected to the end of the slide bar 6732 close to the air box 6724. When the chest cavity is expanded, when the slider 62 moves, the slider 62 drives the top frame 68 to move, the top frame 68 drives the mounting block 6728 to move, and the mounting block 6728 drives the push plate 6731 on the slide bar 6732 to move. When the push plate 6731 contacts the piston plate 6725, the push plate 6731 continues to control the expansion. When the thorax 6720 is moved, the piston plate 6725 is pushed, pushing out the gas in the gas box 6724 and delivering the gas through the delivery pipe 6727. Under the action of the connecting pipe 6721, the gas enters the two gas cylinders 6720, and the gas pushes the piston plate 6723 down. The piston plate 6723 drives the control rod 6722 down, and the control rod 6722 drives the top plate 678 down. The top plate 678 drives the lifting rod 676 down, and the lifting rod 676 drives the pressing plate 677 down, making it easier for the pressing plate 677 to press down around the patient's ribs, thereby increasing the stability of the chest cavity expansion and preventing the expansion plate 64 from sliding when expanding.

[0038] The outer side of the push plate 6731 is rotatably connected to the screw 2 6729, the other end of the screw 2 6729 passes through the outer side of the mounting block 6728 and is fixedly connected to the rotating cap 2 6730, and the screw 2 6729 is threadedly connected to the mounting block 6728. Before expanding the chest cavity, rotate the rotating cap 2 6730, and the rotating cap 2 6730 drives the screw 2 6729 to rotate, and the screw 2 6729 drives the push plate 6731 to move horizontally, so as to facilitate the adjustment of the distance between the push plate 6731 and the piston plate 6725, so as to facilitate the expansion and reinforcement of the chest cavity of different people.

[0039] Working principle: When in use, the staff first installs the device on the operating table, then places the expansion plate 64 in the chest cavity, and then rotates the rotating cap 614. The rotating cap 614 drives the screw 613 to rotate. Under the action of the inclined plate 610, the top frames 68 on the left and right sides are controlled to move away from each other. Under the action of the slider 62 and the moving plate 63, the expansion plates 64 on the left and right sides are controlled to expand the patient's chest cavity. When expanding, the top frame 68 drives the mounting block 6728 to move. Under the action of the slide bar 6732, the push plate 6731, the air box 6724, the piston plate 6725, the delivery pipe 6727, and the connecting pipe 6721, the air is pushed into the chest cavity. Gas is introduced into the cylinder 6720. Under the action of the piston disc 6723, the control rod 6722, the top plate 678 and the lifting rod 676, the pressure plate 677 is controlled to press down on the area around the patient's ribs (the surface of the patient's skin at the surgical site), thereby increasing the stability of the expansion plate 64. At the same time, the top plate 678 drives the inclined plate 2 6710 to rotate. Under the action of the side block 6716, the control plate 6713, the control block 6712, the turntable 6711 and the rotating rod 672, the rotation rods of the side plates 673 on the front and rear sides are controlled to facilitate the contact between the side plates 673 and the area around the ribs, thereby enhancing the friction when the expansion plate 64 is expanded and preventing the expansion plate 64 from sliding when expanding the chest cavity.

[0040] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0041] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A thoracotomy auxiliary device for clinical thoracic surgery, comprising a base plate (1), characterized in that: The upper side of the bottom plate (1) is fixedly connected to a support rod (3), the upper side of the bottom plate (1) is provided with a mounting hole (2), the upper end of the support rod (3) is fixedly connected to a fixing plate (4), the front side of the fixing plate (4) is provided with a support unit (6), the upper side of the fixing plate (4) is fixedly connected to a top cover (5), the support unit (6) includes a slide groove (61), the slide groove (61) is provided on the front side of the fixing plate (4), and the inner side of the slide groove (61) is slidably connected to two symmetrically distributed Slider (62), the front sides of the two sliders (62) are fixedly connected to a movable plate (63), the lower side of the movable plate (63) is fixedly connected to an opening plate (64), a through hole (65) is provided in the middle of the opening plate (64), the upper side of the movable plate (63) is fixedly connected to a fixed cover (66), and a reinforcement component (67) is provided on the outer side of the opening plate (64), and the reinforcement component (67) is used to reinforce the opening plate (64) to prevent the opening plate (64) from sliding when the opening plate (64) opens the chest cavity.

2. A thoracotomy assist device for clinical thoracic surgery according to claim 1, characterized in that: The upper sides of the two sliders (62) are fixedly connected to the top frame (68), the upper sides of the two top frames (68) are fixedly connected to the rotating block 1 (69), the outer side of the rotating block 1 (69) is rotatably connected to the inclined plate 1 (610), the outer side of the upper end of the inclined plate 1 (610) is rotatably connected to the rotating block 2 (611), the upper side of the rotating block 2 (611) is fixedly connected to the lifting block (612), the upper side of the fixed plate (4) is rotatably connected to the screw rod 1 (613), the upper end of the screw rod 1 (613) passes through the upper side of the top cover (5) and is fixedly connected to the rotating cap 1 (614), a telescopic rod (615) is fixedly connected between the lifting block (612) and the fixed plate (4), and the screw rod 1 (613) is threadedly connected to the lifting block (612).

3. The thoracotomy assist device for clinical thoracic surgery according to claim 1, characterized in that: The reinforcement assembly (67) includes two mounting grooves (671), which are provided on the front and rear sides of the support plate (64). The inner sides of the mounting grooves (671) on the front and rear sides are rotatably connected to rotating rods (672), and the outer sides of the rotating rods (672) on the front and rear sides are fixedly connected to side plates (673). The outer sides of the side plates (673) are fixedly connected to multiple friction blocks (674).

4. The thoracotomy assist device for clinical thoracic surgery according to claim 3, characterized in that: The upper ends of the two rotating rods (672) pass through the upper side of the movable plate (63) and are fixedly connected to a rotating disk (6711). The outer side of the rotating disk (6711) is fixedly connected to a control block (6712). The upper sides of the two control blocks (6712) are rotatably connected to the control plate (6713). A movable groove (6714) is provided on the upper side of the movable plate (63). A movable block (6715) is slidably connected to the inner side of the movable groove (6714). The front and rear sides of the movable block (6715) are fixedly connected to side blocks (6716). The outer side of the side block (6716) is fixedly connected to a rotating block three (6717). The rotating block three (6717) is rotatably connected to the control plate (6713).

5. The thoracotomy assist device for clinical thoracic surgery according to claim 4, characterized in that: The outer side of the movable plate (63) is fixedly connected to the mounting plate (675), and the outer side of the mounting plate (675) is provided with a lifting rod (676), the lower end of the lifting rod (676) passes through the lower side of the mounting plate (675) and is fixedly connected to the pressure plate (677), the upper end of the lifting rod (676) is fixedly connected to the top plate (678), the outer side of the top plate (678) is fixedly connected to the connecting block 1 (679), the outer side of the connecting block 1 (679) is rotatably connected to the inclined plate 2 (6710), the upper side of the side block (6716) is fixedly connected to the connecting block 2 (6718), and the connecting block 2 (6718) is rotatably connected to the inclined plate 2 (6710).

6. The thoracotomy assist device for clinical thoracic surgery according to claim 5, characterized in that: Two gas cylinders (6720) are fixedly connected to the upper side of the mounting plate (675), a piston disc (6723) is provided on the inner side of the gas cylinder (6720), a control rod (6722) is fixedly connected to the upper side of the piston disc (6723), the upper end of the control rod (6722) passes through the upper side of the gas cylinder (6720) and is fixedly connected to the top plate (678), a spring 1 (6719) is fixedly connected between the top plate (678) and the gas cylinder (6720), a connecting pipe (6721) is fixedly connected between the two gas cylinders (6720), and the front side of the top cover (5) is fixedly connected to the gas cylinder (6720). The air box (6724) is provided with a piston plate (6725) on the inner side of the air box (6724), a spring 2 (6726) is fixedly connected between the outer side of the piston plate (6725) and the inner wall of the air box (6724), a delivery pipe (6727) is fixedly connected between the air box (6724) and the connecting pipe (6721), the outer sides of the two top frames (68) are fixedly connected with mounting blocks (6728), the outer sides of the mounting blocks (6728) are provided with a slide rod (6732), and the end of the slide rod (6732) close to the air box (6724) is fixedly connected with a push plate (6731).

7. The thoracotomy assist device for clinical thoracic surgery according to claim 6, characterized in that: The outer side of the push plate (6731) is rotatably connected to a second screw rod (6729), the other end of the second screw rod (6729) passes through the outer side of the mounting block (6728) and is fixedly connected to a second rotating cap (6730), and the second screw rod (6729) is threadedly connected to the mounting block (6728).

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