An osteosynthesis plate that can be adjusted to the site of a fracture in a patient

Abstract

The present application relates to the medical fixing device for orthopedics, especially to a bone compression plate which can be adjusted to the fracture site of a patient, and provides a bone compression plate which can be adjusted to the fracture site of a patient and can fix the fracture site of patients with different body types and different fracture lengths, and the bone compression plate which can be adjusted to the fracture site of a patient comprises support plates, the number of the support plates is two, the two support plates are symmetrically arranged on the left and right sides, and the two support plates are connected through bearings. When the fracture site of a patient needs to be fixed, the sliding plate is pulled inward and outward according to the length of the fracture of the patient, so as to adjust the length of the support of the sliding plate and the support plate to the fracture site of the patient, so that the sliding plate and the support plate can always support the fracture site of the patient, thereby meeting the needs of patients with different fracture lengths, and the practicality and applicability are strong.

Description

TECHNICAL FIELD

[0001] The present application relates to medical fixation device for orthopedics, especially to a compression plate which can be adjusted to the fracture site of a patient. BACKGROUND

[0002] In clinic, it is necessary to fix the fracture site of a patient by using a compression plate.

[0003] Patent No. CN202843870U discloses a fracture fixation plate, belonging to the field of orthopedic medical devices, comprising a clamp plate and an auxiliary clamp plate, wherein the clamp plate is movably connected with the auxiliary clamp plate through a rotating shaft, a plurality of fixing holes are arranged on the side surface of the clamp plate, a limiting hole is arranged on the side surface of the auxiliary clamp plate corresponding to the clamp plate, and a restraint belt is arranged at the bottom end of the side surface of the clamp plate. In clinical use, the clamp plate and the auxiliary clamp plate are buckled at the fracture site of a patient, then the rotating shaft part connected with the clamp plate and the auxiliary clamp plate is held by hand, the restraint belt is alternately threaded through the plurality of limiting holes and the fixing holes by the other hand, and finally the restraint belt is fixed.

[0004] However, the length of the clamp plate and the auxiliary clamp plate in the above-mentioned patent is fixedly set, which is difficult to be adjusted in real time according to the different lengths of the fracture of a patient, so it is difficult to fix the fracture site of a patient with different fracture lengths, and the size of the auxiliary clamp plate is fixedly set, which cannot be adjusted in real time according to the body size difference of a patient, so it is difficult to clamp the fracture site of a patient with different body sizes, and the applicability and practicability are relatively poor. Therefore, it is very necessary to design a compression plate which can fix the fracture site of a patient with different fracture lengths and clamp the fracture site of a patient with different body sizes. SUMMARY

[0005] In order to overcome the shortcomings that the prior art is difficult to fix the fracture site of a patient with different fracture lengths and difficult to clamp the fracture site of a patient with different body sizes, the present application provides a compression plate which can be adjusted to the fracture site of a patient.

[0006] A compression plate which can be adjusted to the fracture site of a patient, comprising a support plate, the number of support plates is two, two support plates are symmetrically arranged on the left and right sides, two support plates are movably connected through bearings, further comprising a telescopic mechanism and an adjusting mechanism, a telescopic mechanism for fixing the fracture site of a patient with different fracture lengths is arranged inside the support plate, and an adjusting mechanism for clamping the fracture site of a patient with different body sizes is arranged on the support plate.

[0007] As a preferred technical scheme of the present application, the telescopic mechanism comprises sliding plates and fixed shafts, the inside and left and right sides of the support plates are each provided with a fixed shaft, the front and rear sides of the two fixed shafts on the left are each slidably connected with a sliding plate, the front and rear sides of the two fixed shafts on the right are also each slidably connected with a sliding plate, the sliding plates on the left and right sides are each slidably connected with the support plates on the left and right sides, according to the length of the fracture of the patient, the sliding plates are pulled inward and outward to adjust the length of the support of the fracture of the patient by the sliding plates and the support plates.

[0008] As a preferred technical scheme of the present application, the adjusting mechanism comprises lead screws, moving blocks, clamping blocks, limit blocks and torsion springs, the left side of the left support plate is provided with a limit block on the front and rear sides, the right side of the rear support plate is also provided with a limit block on the front and rear sides, the limit blocks are each rotatably connected with a lead screw, the lead screws are each threadedly connected with a moving block, the moving blocks are each slidably connected with the support plates, the moving blocks are each rotatably connected with a clamping block, the moving blocks are each wound with a torsion spring, the front and rear ends of the torsion springs are each connected with the clamping block and the moving block, the lead screws are rotated in opposite directions to drive the moving blocks to move inward and outward, the moving blocks drive the clamping blocks to move inward and outward, and the clamping blocks clamp the fracture of the patient of different body types.

[0009] As a preferred technical scheme of the present application, the fixing mechanism for fixing the sliding plates is further provided, the fixing mechanism comprises pins and long extension springs, the left side of the left support plate is slidably connected with a pin on the front and rear sides, the right side of the support plate is also slidably connected with a pin on the front and rear sides, the left side of the left sliding plate is uniformly provided with a limit hole on the front and rear sides, the right side of the right sliding plate is also uniformly provided with a limit hole on the front and rear sides, the pins are inserted into the limit holes of the sliding plates, the pins are each wound with a long extension spring, the inner and outer ends of the long extension springs are each connected with the support plate and the pin, the sliding plates are slid inward and outward to the required position, the pins correspond to the limit holes on the sliding plates, the pins are loosened, the long extension springs are reset to drive the pins to slide inward and be clamped into the limit holes of the sliding plates.

[0010] As a preferred technical scheme of the present application, the close mechanism for clamping the fracture of the patient again is further provided, the close mechanism comprises fixed blocks, connecting rods and short extension springs, the inner walls of the clamping blocks are each provided with a connecting rod on the upper and lower sides, the connecting rods on the same clamping block are slidably connected with a fixed block, the connecting rods are each wound with a short extension spring, the inner and outer ends of the short extension springs are each connected with the fixed block and the connecting rod, the fixed blocks are rotated inward to contact the body of the patient, the fixed blocks are inwardly contracted under the extrusion of the body of the patient, the short extension springs are compressed, and the clamping blocks clamp the fracture of the patient, so that the fracture of the patient is clamped again by the fixed blocks and the short extension springs.

[0011] As a preferred technical scheme of the present application, the heating mechanism for heating the fracture site of the patient is further included, and the heating mechanism comprises a heating sheet and a fixing plate.

[0012] As a preferred technical scheme of the present application, the clamping mechanism for fixing the two supporting blocks is further included, and the clamping mechanism comprises a locking block, an inserting block, a push rod, a fixing column, an extension shaft and a long pressure spring.

[0013] As a preferred technical scheme of the present application, the elastic cloth is further included, and the elastic cloth is detachably connected to the inner side of the moving block and the supporting plate.

[0014] Advantages:

[0015] 1. When the fracture site of the patient needs to be fixed, the length of the fracture of the patient is first determined, and the sliding plate is pulled inward and outward to adjust the length of the support of the sliding plate and the supporting plate to the fracture site of the patient, so that the sliding plate and the supporting plate can always support the fracture site of the patient, thereby meeting the needs of patients with different fracture lengths and having high practicability and applicability.

[0016] 2. The moving block moves inward and outward by the forward and reverse rotation of the lead screw, thereby driving the clamping block to move inward and outward, and the clamping block can clamp the fracture site of patients with different body types, thereby improving the practicability and applicability.

[0017] 3. The pin slides inward and is clamped into the limiting hole of the sliding plate by the reset of the long extension spring, thereby fixing the sliding plate, so that the stability of the sliding plate can be improved during the fixation of the fracture site of the patient, and the fixation effect of the fracture site of the patient is maintained.

[0018] 4. The fracture site of the patient is clamped by the clamping block, so that the fracture site of the patient can be further clamped by the fixing block and the short extension spring, thereby stably fixing the fracture site of the patient.

[0019] 5, after the heating sheet covers the fracture site of the patient, the heating sheet is started, the heating sheet heats the fracture site of the patient, increases the blood circulation of the fracture site of the patient, and speeds up the recovery speed of the fracture of the patient;

[0020] 6, by inserting the block into the lock block, the fixed column is inserted between the lock block and the block, the lock block and the block fix the two support blocks, so that the stability of the support block can be improved during the fixation of the fracture site of the patient, and the fixation effect of the fracture site of the patient is enhanced. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the first perspective view of the structure of the application.

[0022] Figure 2 It is the second perspective view of the structure of the application.

[0023] Figure 3 It is the first perspective view of the structure of the application.

[0024] Figure 4 It is the second perspective view of the structure of the application.

[0025] Figure 5 It is the perspective view of the adjusting mechanism of the application.

[0026] Figure 6 It is the perspective view of the fixing mechanism of the application.

[0027] Figure 7 It is the perspective view of the close mechanism of the application.

[0028] Figure 8 It is the perspective view of the heating mechanism of the application.

[0029] Figure 9 It is the perspective view of the clamping mechanism of the application.

[0030] Figure 10 It is the perspective view of the block and the fixed column of the application.

[0031] In the figure, 1 is a support plate, 2 is an extension mechanism, 21 is a sliding plate, 22 is a fixed shaft, 3 is an adjusting mechanism, 31 is a lead screw, 32 is a moving block, 33 is an elastic cloth, 34 is a clamping block, 35 is a limiting block, 36 is a torsion spring, 4 is a fixing mechanism, 41 is a pin, 42 is a long extension spring, 5 is a close mechanism, 51 is a fixed block, 52 is a connecting rod, 53 is a short extension spring, 6 is a heating mechanism, 61 is a heating sheet, 62 is a fixed plate, 7 is a clamping mechanism, 71 is a lock block, 72 is a block, 73 is a push rod, 74 is a fixed column, 75 is an extension shaft, and 76 is a long pressure spring. DETAILED DESCRIPTION

[0032] The application will be described in detail below with reference to the drawings and specific embodiments, but not as a limitation to the application.

[0033] Example 1

[0034] A bone compression plate that can be adjusted for the fracture site of a patient, as shown in Figure 1 and Figure 2 , comprises a support plate 1, an extension mechanism 2 and an adjustment mechanism 3, the number of support plates 1 is two, the two support plates 1 are symmetrically arranged on the left and right sides, the two support plates 1 are rotatably connected between the inner walls, the support plate 1 is provided with the extension mechanism 2, and the support plate 1 is provided with the adjustment mechanism 3.

[0035] As shown in Figure 1 , Figure 2 , Figure 3 and Figure 4 , the extension mechanism 2 comprises a sliding plate 21 and a fixed shaft 22, the number of fixed shafts 22 is four, two fixed shafts 22 are respectively welded on the left and right sides of the inner part of the left support plate 1, and the other fixed shafts 22 are respectively welded on the left and right sides of the inner part of the right support plate 1, the number of sliding plates 21 is four, two sliding plates 21 are respectively slidably connected between the front and rear sides of the two fixed shafts 22 on the left, and the other two sliding plates 21 are respectively slidably connected between the front and rear sides of the two fixed shafts 22 on the right, and the sliding plates 21 on the left and right sides are respectively slidably connected with the support plates 1 on the left and right sides.

[0036] As shown in Figure 1 , Figure 2 and Figure 5 , the adjustment mechanism 3 comprises a lead screw 31, a moving block 32, an elastic cloth 33, a clamping block 34, a limiting block 35 and a torsion spring 36, the number of limiting blocks 35 is four, two limiting blocks 35 are respectively welded on the front and rear parts of the left side of the left support plate 1, and the other two limiting blocks 35 are respectively welded on the front and rear parts of the right side of the right support plate 1, the number of lead screws 31 is four, the four lead screws 31 are respectively rotatably connected on the four limiting blocks 35, the moving block 32 is threadedly connected on the lead screw 31, the moving block 32 is slidably connected with the support plate 1, the clamping block 34 is rotatably connected on the moving block 32, the torsion spring 36 is wound on the moving block 32, the front and rear ends of the torsion spring 36 are respectively connected with the clamping block 34 and the moving block 32, the elastic cloth 33 is detachably connected on the inner side of the moving block 32, the inner side of the elastic cloth 33 is detachably connected with the support plate 1, the elastic cloth 33 is located above the lead screw 31, and the elastic cloth 33 shields the lead screw 31.

[0037] When it is necessary to fix the fracture site of a patient, firstly, the sliding plate 21 is pulled inward and outward according to the length of the fracture of the patient, so that the length of the support of the sliding plate 21 and the support plate 1 to the fracture site of the patient is adjusted, so that the sliding plate 21 and the support plate 1 can always support the fracture site of the patient, so as to meet the needs of patients with different fracture lengths, and the practicability and applicability are high. Then, the lead screw 31 is rotated forward and backward, so that the moving block 32 moves inward and outward, and then drives the clamping block 34 to move inward and outward, and makes the clamping block 34 be able to clamp the fracture site of patients with different body shapes, so as to improve the practicability and applicability. Then, the clamping block 34 is turned outward to open, the torsional spring 36 is twisted and deformed, then the support plate 1 and the sliding plate 21 support the fracture site of the patient, and the clamping block 34 is loosened, the clamping block 34 is turned inward to clamp the fracture site of the patient by the reset of the torsional spring 36, so as to fix the fracture site of the patient. When it is necessary to remove the bone compression plate which can adjust the fracture site of the patient, the clamping block 34 is turned outward to open, then the bone compression plate which can adjust the fracture site of the patient can be removed, and then the clamping block 34 is turned inward to reset.

[0038] Embodiment 2

[0039] On the basis of embodiment 1, as shown in Figure 1 、 Figure 2 and Figure 6 , further comprising a fixing mechanism 4, the fixing mechanism 4 comprises a pin 41 and a long extension spring 42, the number of the pin 41 is four, two pins 41 are respectively slidably connected to the left side of the left support plate 1, the other two pins 41 are respectively slidably connected to the right side of the support plate 1, the left side of the sliding plate 21 is uniformly opened to limit the hole, the right side of the sliding plate 21 is also uniformly opened to limit the hole, the pin 41 is inserted into the limiting hole of the sliding plate 21, and the long extension spring 42 is wound on the pin 41, and the inner and outer ends of the long extension spring 42 are respectively connected with the support plate 1 and the pin 41.

[0040] When the sliding plate 21 needs to be pulled inward and outward, the pin 41 is first pulled outward, so that the pin 41 moves outward and is separated from the limiting hole of the sliding plate 21, and the long extension spring 42 is compressed, then the sliding plate 21 can be pulled inward and outward, when the sliding plate 21 slides inward and outward to the required position, the pin 41 corresponds to the limiting hole on the sliding plate 21, then the pin 41 is loosened, the long extension spring 42 is reset to make the pin 41 slide inward and be inserted into the limiting hole of the sliding plate 21, so as to fix the sliding plate 21, so as to improve the stability of the sliding plate 21 during the fixation of the fracture site of the patient, and to maintain the fixation effect of the fracture site of the patient.

[0041] As shown in Figure 1 、 Figure 2 andFigure 7 As shown, the device further comprises a close mechanism 5, which comprises a fixed block 51, a connecting rod 52 and a short telescopic spring 53. The connecting rod 52 is welded to the inner wall of the clamping block 34. The fixed block 51 is slidingly connected between the connecting rods 52 on the same clamping block 34. The bottom of the fixed block 51 is in contact with the adjacent elastic cloth 33. The short telescopic spring 53 is wound around the connecting rod 52. The inner and outer ends of the short telescopic spring 53 are connected with the fixed block 51 and the connecting rod 52 respectively.

[0042] When the clamping block 34 rotates outward, the fixed block 51, the connecting rod 52 and the short telescopic spring 53 rotate outward. When the support plate 1 supports the fractured part of the patient, the clamping block 34 rotates inward. When the fixed block 51 rotates inward and contacts the patient's body, the fixed block 51 is compressed inward by the patient's body. The short telescopic spring 53 is compressed. Then the clamping block 34 clamps the fractured part of the patient. Thus, the fixed block 51 and the short telescopic spring 53 can further clamp the fractured part of the patient, which is beneficial to more stably fix the fractured part of the patient. When the clamping block 34 rotates outward again, the connecting rod 52, the short telescopic spring 53 and the fixed block 51 rotate outward. The short telescopic spring 53 resets the fixed block 51.

[0043] As shown in Figure 1 , Figure 2 and Figure 8 , the device further comprises a heating mechanism 6, which comprises a heating sheet 61 and a fixed plate 62. The fixed plate 62 is welded to the left side of the upper part of the left support plate 1. The heating sheet 61 is rotatingly connected to the fixed plate 62. The heating sheet 61 is in the shape of a semi-cylinder, which can cover the fractured part of the patient.

[0044] When it is necessary to fix the fractured part of the patient, the heating sheet 61 is rotated outward to open. When the clamping block 34 clamps the fractured part of the patient, the heating sheet 61 is rotated inward to cover the fractured part of the patient. Then the heating sheet 61 is started to heat the fractured part of the patient, which increases the blood circulation of the fractured part of the patient and accelerates the recovery speed of the fracture of the patient. After using the heating sheet 61 for thirty minutes, the heating sheet 61 is turned off. During the recovery period of the fracture of the patient, the heating sheet 61 can be used to heat the fractured part of the patient three times a day, so that the fractured part of the patient can recover as soon as possible.

[0045] As shown in Figure 2 , Figure 9 and Figure 10As shown, further include clamping mechanism 7, clamping mechanism 7 includes lock block 71, plug 72, push rod 73, fixed column 74, telescopic shaft 75 and long pressure spring 76, lock block 71 is installed in the left support plate 1 bottom middle, the left support plate 1 bottom is rotatably connected with push rod 73, the right support plate 1 bottom right middle is installed with telescopic shaft 75, the left side of telescopic shaft 75 is installed with plug 72, plug 72 is rotatably connected with push rod 73, plug 72 is inserted into lock block 71, long pressure spring 76 is wound around the right side of plug right, the left and right ends of long pressure spring 76 are connected with plug 72 and telescopic shaft 75 respectively, fixed column 74 is slidably connected with lock block 71, fixed column 74 is inserted into plug 72.

[0046] Initially, plug 72 is inserted into lock block 71, fixed column 74 is inserted between lock block 71 and plug 72, lock block 71 and plug 72 fix two support blocks 1, so as to improve the stability of support block 1 during the process of fixing the fracture site of the patient, and to enhance the fixing effect of the fracture site of the patient, when carrying the bone compression plate which can be adjusted for the fracture site of the patient, in order to save the occupied space, two support plates 1 can be folded, when it is needed to fold the support plate 1, people first pull the fixed column 74 outward, so that the fixed column 74 is separated from the plug 72, then rotate the left support plate 1 to the right lower side, the left support plate 1 rotates to the right lower side, so that the push rod 73 rotates, and the plug 72 is pushed outward by the push rod 73, so that the plug 72 moves to the right and separates from the lock block 71, the long pressure spring 76 is compressed, then the left support plate 1 can be folded to the lower side of the right support plate 1, and the two support plates 1 can be bound by using external ropes, next time, loosen the external ropes, the long pressure spring 76 is reset to drive the plug 72 to move left, the plug 72 moves left through the push rod 73 to make the left support plate 1 rotate to the left upper side and open, then the plug 72 continues to move left and inserts into the lock block 71, and then the fixed column 74 is inserted into the plug 72.

[0047] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A bone compression plate which can be adjusted to the fracture site of a patient, comprising a support plate (1), the number of support plates (1) is two, the two support plates (1) are symmetrically arranged on the left and right sides, and the inner walls of the two support plates (1) are connected by a bearing rotation, characterized in that: It also includes telescopic mechanism (2) and adjustment mechanism (3), the support plate (1) inside is provided with telescopic mechanism (2) for fixing the fracture site of patients with different fracture length, the support plate (1) is provided with adjustment mechanism (3) for clamping the fracture site of patients with different body shape; Telescopic mechanism (2) includes sliding plate (21) and fixed shaft (22), the inside of support plate (1) is provided with fixed shaft (22) on both sides, the left two fixed shaft (22) front side and rear side are all slidably connected with sliding plate (21), the right two fixed shaft (22) front side and rear side are also all slidably connected with sliding plate (21), the left and right sliding plate (21) are slidably connected with the left and right support plate (1) respectively, according to the length of the patient's fracture, pull the sliding plate (21) inside and outside, adjust the length of the sliding plate (21) and the support plate (1) support the fracture site of the patient; Adjustment mechanism (3) includes screw rod (31), moving block (32), clamp block (34), limit block (35) and torsion spring (36), the left side of the left support plate (1) is provided with limit block (35) on both sides, the right side of the rear support plate (1) is also provided with limit block (35) on both sides, the limit block (35) is rotatably connected with screw rod (31), the screw rod (31) is threadedly connected with moving block (32), the moving block (32) is slidably connected with the support plate (1), the moving block (32) is rotatably connected with clamp block (34), the moving block (32) is wound with torsion spring (36), the torsion spring (36) is connected with clamp block (34) and moving block (32) respectively, by rotating the screw rod (31) forward and backward, the moving block (32) moves inside and outside, the clamp block (34) moves inside and outside driven by the moving block (32), the clamp block (34) clamps the fracture site of patients with different body shape; It also includes clamping mechanism (7) for fixing the two support blocks (1), clamping mechanism (7) includes lock block (71), plug block (72), push rod (73), fixed column (74), telescopic shaft (75) and long pressure spring (76), lock block (71) is installed in the middle of the bottom of the left support plate (1), push rod (73) is rotatably connected with the bottom of the left support plate (1), telescopic shaft (75) is installed in the middle of the right side of the bottom of the right support plate (1), plug block (72) is installed on the left side of telescopic shaft (75), plug block (72) is rotatably connected with push rod (73), plug block (72) is inserted into lock block (71), long pressure spring (76) is wound on the right side of the plug block, long pressure spring (76) is connected with plug block (72) and telescopic shaft (75) respectively, lock block (71) is slidably connected with fixed column (74), fixed column (74) is inserted between lock block (71) and plug block (72), lock block (71) and plug block (72) fix the two support plates (1); It also includes a heating mechanism (6) for heating the patient's fracture site, the heating mechanism (6) includes a heating sheet (61) and a fixed plate (62), the left support plate (1) upper left side is provided with a fixed plate (62), the fixed plate (62) is rotatably connected with a heating sheet (61), the heating sheet (61) is a half cylinder, after the heating sheet (61) covers the patient's fracture site, the heating sheet (61) is started, and the heating sheet (61) heats the patient's fracture site.

2. The bone compression plate adjustable to a patient's bone fracture site of claim 1, wherein: It also includes a fixing mechanism (4) for fixing the sliding plate (21), the fixing mechanism (4) includes a pin (41) and a long extension spring (42), the left side of the left support plate (1) is slidably connected with the pin (41), the right side of the support plate (1) is also slidably connected with the pin (41), the left and right sides of the left sliding plate (21) are uniformly provided with limiting holes, the left and right sides of the right sliding plate (21) are also uniformly provided with limiting holes, the pin (41) is inserted into the limiting hole of the sliding plate (21), the pin (41) is wound with a long extension spring (42), and the long extension spring (42) is connected with the support plate (1) and the pin (41) at both ends. The sliding plate (21) slides inwards or outwards to the desired position, the pin (41) corresponds to the limiting hole on the sliding plate (21), the pin (41) is loosened, the long extension spring (42) is reset to drive the pin (41) to slide inward and be clamped into the limiting hole of the sliding plate (21).

3. An adjustable bone plate for a patient's fractured bone site as recited in claim 2, wherein: It also includes a close mechanism (5) for clamping the patient's fracture site again, the close mechanism (5) includes a fixed block (51), a connecting rod (52) and a short extension spring (53), the inner wall of the clamping block (34) is provided with a connecting rod (52) on the upper and lower parts, and the connecting rods (52) on the same clamping block (34) are slidably connected with a fixed block (51). The connecting rod (52) is wound with a short extension spring (53), and the short extension spring (53) is connected with the fixed block (51) and the connecting rod (52) at both ends. The fixed block (51) rotates inwardly to contact the patient's body, the fixed block (51) is pressed inwardly by the patient's body, the short extension spring (53) is compressed, and the clamping block (34) clamps the patient's fracture site, so that the fixed block (51) and the short extension spring (53) clamp the patient's fracture site again.

4. An adjustable bone plate for a patient's fractured bone according to claim 3, wherein: It also includes an elastic cloth (33), and the inner side of the moving block (32) is detachably connected with an elastic cloth (33). The inner side of the elastic cloth (33) is detachably connected with the support plate (1), the elastic cloth (33) is located above the lead screw (31), and the bottom of the fixed block (51) is in contact with the adjacent elastic cloth (33). The elastic cloth (33) shields the lead screw (31).

Images