A positioning piece for a stent used for traction

Abstract

The present invention discloses a positioning member of a bracket for traction surgery, comprising a hoop frame and two ear support members, wherein the hoop frame is a horizontally arranged U-shaped member, which is used to be clamped on the head of a patient, and the bottom of the groove of the hoop frame is used to rest on the forehead of the patient, and the two ear support members are respectively placed below the two ends of the hoop frame, and the two ends of the hoop frame are respectively connected to the ear support members located below the hoop frame through a connecting member, and the two ear support members are respectively used to rest in the ears of the patient on both sides to support the hoop frame. The hoop frame has a simple structure, can be conveniently installed on the head of the patient, and its position can be adjusted so that an external traction bracket can be placed on the hoop frame for direct installation, thereby making the external traction bracket easy to install and accurately positioned.

Description

Technical Field

[0001] The invention belongs to the field of medical equipment, and in particular relates to a positioning piece of a bracket for traction surgery. Background Art

[0002] The external traction bracket is a surgical instrument commonly used in cranio-maxillofacial surgery to treat mid-face dysplasia. Some patients with cleft lip and palate will have insufficient development of the maxillary bone in three dimensions during the growth and development period or after the growth and development is completed. To solve this problem, the maxillary bone is gradually moved forward by distraction osteogenesis in the clinic. One of the most important links in this treatment plan is the placement of the external traction bracket (RED bracket), that is, the fixed point is about 5 cm above the ear plane of the temporal parietal on both sides. From this point, 2 points are designed every 1 cm forward and backward, and the 5 points are connected to form a straight line slightly tilted to the head. A threaded titanium nail is fixed in each point. The semicircular head frame of the traction bracket is fixed to the skull through these 10 titanium nails. Then the vertical and horizontal rods and 2 screws of the traction bracket are installed. The length of the spring is adjusted by rotating the nut of the screw to traction the bone to the position designed before the operation or the relatively ideal position after the operation. For the orderly progress of the later traction treatment, it is very important to correctly and properly place the RED bracket during the operation. However, the installation of an external traction stent requires a high level of physician experience and is difficult and time-consuming to install. Summary of the invention

[0003] In order to solve the above technical problems, the object of the present invention is to provide a positioning member for a traction stent which has a simple structure and is easy to operate.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the present invention is as follows: a positioning piece of a bracket for traction surgery, comprising a hoop frame and two ear supports, the hoop frame is a horizontally arranged U-shaped component, which is used to be clamped on the patient's head, with its groove bottom facing forward, and is used to rest on the patient's forehead, the two ear supports are respectively placed below the two ends of the hoop frame, the two ends of the hoop frame are respectively connected to the ear supports located below it through a connecting piece, and the two ear supports are respectively used to rest in the ears on both sides of the patient to support the hoop frame.

[0005] The beneficial effect of the above technical solution is that it has a simple structure, can be easily installed on the patient's head, and its position can be adjusted so that the external traction bracket can be directly installed on the hoop frame, thereby making the external traction bracket easy to install and accurately positioned.

[0006] The hoop frame in the above technical solution includes a width adjusting member and two support rods arranged along the front-to-back direction and spaced apart along the left-to-right direction. The front ends of the two support rods are connected to the width adjusting member, and the width adjusting member is used to adjust the spacing distance between the two support rods. The rear ends of the two support rods constitute the two ends of the hoop frame.

[0007] The beneficial effect of the above technical solution is that: it has a simple structure, and the spacing between the two support rods is adjusted by the width adjusting member so that the two support rods are attached to both sides of the human head.

[0008] The width adjustment member in the above technical solution includes a slide rail, two first sliders and two first locking members, the two first sliders correspond to the two first locking members one by one, the two first sliders are respectively installed at the front ends of the corresponding support rods, the slide rail is horizontally arranged at the front ends of the two support rods along the left and right directions, and the two first sliders are both slidably connected to the slide rail, each of the first sliders can slide on the slide rail along its length direction under the action of external force, and the two first locking members are respectively installed on the corresponding first sliders, which are used to fix the corresponding first slider at any position of its sliding track.

[0009] The beneficial effects of the above technical solution are: it has a simple structure, is easy to adjust, and is flexible to use.

[0010] The slide rail in the above technical solution is a rod body, the first sliding block is provided with a first sliding hole penetrating it in the left-right direction, and the first sliding hole cooperates with the slide rail, and the slide rail passes through the first sliding holes of the two first sliding blocks to be slidably connected thereto.

[0011] The beneficial effects of the above technical solution are: its structure is simple, and the entire positioning member can be disassembled when not in use.

[0012] In the above technical solution, the first locking member is a bolt, and each of the first sliding blocks is provided with a first screw hole along the front-to-back direction that is threadedly matched with the first locking member, and one end of the first screw hole is connected to the first sliding hole, and the first locking members are respectively installed in the first screw holes on the corresponding first sliding blocks and threadedly connected thereto, with the threaded ends facing the corresponding first sliding holes, and the first locking members are tightened so that their threaded ends abut against the slide rail to fix the corresponding first sliding block on the slide rail, or the first locking members are loosened to loosen the first sliding block.

[0013] The beneficial effects of the above technical solution are: it has a simple structure, good fastening effect, and is easy to assemble and disassemble.

[0014] The connecting member in the above technical solution includes a connecting rod, a second slider, a second locking member and a third locking member, the second slider is slidably installed at the corresponding end of the hoop frame, the connecting rod is vertically arranged and slidably connected with the corresponding second slider, the lower end of the connecting rod is connected to the corresponding ear support member, the second slider can slide along the front and rear length direction at the corresponding end of the hoop frame under the action of external force, or slide along the up and down direction on the corresponding connecting rod, and the second locking member and the third locking member are both installed on the corresponding second slider, the second locking member is used to fix the corresponding second slider at any position of its sliding track at the corresponding end of the hoop frame, and the third locking member is used to fix the corresponding second slider at any position of its sliding track on the corresponding connecting rod.

[0015] The beneficial effect of the above technical solution is that the position of the ear support can be adjusted by adjusting the position of the second slider on the hoop frame and the connecting rod, so that the adaptability of the entire positioning member is stronger.

[0016] In the above technical solution, the second sliding block is provided with a second sliding hole along the front-to-back direction to cooperate with the corresponding end of the hoop frame, and a third sliding hole is provided along the up-down direction to cooperate with the corresponding connecting rod, and the second sliding hole and the third sliding hole are staggered, the corresponding end of the hoop frame passes through the second sliding hole corresponding to the second sliding block and the two are slidably connected, and the upper end of the connecting rod passes through the third sliding hole corresponding to the second sliding block, and the two are slidably connected.

[0017] The beneficial effects of the above technical solution are: its structure is simple and easy to adjust, and at the same time it enables the entire positioning component to meet the needs of different patients.

[0018] In the above technical solution, the second locking member and the third locking member are both bolts, and the second sliding block is provided with a second screw hole threadedly matched with the second locking member and a third screw hole threadedly matched with the third locking member, one end of the second screw hole is connected with the corresponding second sliding hole, and one end of the third screw hole is connected with the corresponding third sliding hole, the second locking member is threadedly installed in the corresponding second screw hole, and the threaded end of the second locking member faces the corresponding second sliding hole, the third locking member is threadedly installed in the corresponding third screw hole, and the threaded end of the third locking member faces the corresponding third sliding hole, the second locking member is tightened to fix the corresponding second sliding block at any position of the sliding track on the corresponding end of the hoop frame, or the second locking member is loosened to release the second sliding block from the hoop frame, the third locking member is tightened to fix the corresponding second sliding block at any position of the sliding track on the corresponding connecting rod, or the third locking member is loosened to release the corresponding second sliding block from the corresponding connecting rod.

[0019] The beneficial effects of the above technical solution are: it has a simple structure and is easy to fasten.

[0020] The ear support member in the above technical solution is a rubber block.

[0021] The beneficial effect of the above technical solution is that it helps to reduce the pressure of the ear support on the ear and improve the comfort of the patient.

[0022] The ear support member in the above technical solution includes an earplug, a connecting block and a fourth locking member. The connecting block is vertically provided with a fourth sliding hole running through it from top to bottom. The lower end of the connecting rod passes through the fourth sliding hole. The connecting block can slide on the connecting rod along its length direction. The earplug is arranged on the side wall of the connecting block to be inserted into the patient's external auditory canal. The fourth locking member is installed on the connecting block to fix the connecting block at any position of its sliding trajectory.

[0023] The beneficial effect of the above technical solution is that the horizontal height of the earplug relative to the hoop frame can be adjusted to meet the needs of patients of different ages and body shapes.

[0024] The fourth locking piece in the above technical solution is a bolt, and the connecting block is provided with a fourth screw hole threadedly matched with the fourth locking piece, one end of the fourth screw hole is connected with the fourth sliding hole, and the fourth locking piece is threadedly installed in the fourth screw hole, and the threaded end of the fourth locking piece faces the fourth sliding hole, and the fourth locking piece is tightened to fix the corresponding connecting block at any position of the sliding track on the corresponding connecting rod, or the fourth locking piece is loosened to loosen the corresponding connecting block from the corresponding connecting rod.

[0025] The beneficial effects of the above technical solution are: its structure is simple and locking is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A top view of a positioning member of a traction stent according to an embodiment of the present invention;

[0027] Figure 2 Another top view of the positioning member of the traction stent according to the embodiment of the present invention;

[0028] Figure 3 A side view of a positioning member of a traction stent according to an embodiment of the present invention;

[0029] Figure 4 This is a diagram showing the matching of the ear support and the connecting rod according to an embodiment of the present invention.

[0030] In the figure: 1 hoop frame, 11 width adjustment member, 111 slide rail, 112 first slider, 113 first locking member, 12 support rod, 2 ear support member, 21 ear plug, 22 connecting block, 23 fourth locking member, 3 connecting member, 31 connecting rod, 32 second slider, 33 second locking member, 34 third locking member. DETAILED DESCRIPTION

[0031] The principles and features of the present invention are described below in conjunction with the accompanying drawings and embodiments. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0032] like Figure 1 As shown, the present embodiment provides a positioning member of a bracket for traction surgery, including a hoop frame 1 and two ear supports 2, wherein the hoop frame 1 is a horizontally arranged U-shaped member, which is used to be clamped on the patient's head, with its groove bottom facing forward, and is used to rest on the patient's forehead, and the two ear supports 2 are respectively placed below the two ends of the hoop frame 1, and the two ends of the hoop frame 1 are respectively connected to the ear supports 2 located below it through a connecting member 3, and the two ear supports 2 are respectively used to rest in the ears of the patient on both sides to support the hoop frame 1, which has a simple structure and can be conveniently installed on the patient's head and its position can be adjusted so that the external traction bracket can be placed on the hoop frame for direct installation, thereby making the external traction bracket easy to install and having high installation efficiency.

[0033] Among them, the hoop frame 1 in the above technical solution includes a width adjusting member 11 and two support rods 12 arranged in the front-to-back direction and spaced apart in the left-to-right direction. The front ends of the two support rods 12 are connected to the width adjusting member 11. The width adjusting member 11 is used to adjust the spacing distance between the two support rods 12. The rear ends of the two support rods 12 constitute the two ends of the hoop frame 1. Its structure is simple. The spacing distance between the two support rods is adjusted by the width adjusting member so that the two support rods are attached to both sides of the human head.

[0034] like Figure 2As shown, the width adjustment member 11 in the above technical solution includes a slide rail 111, two first sliders 112 and two first locking members 113. The two first sliders 112 correspond to the two first locking members 113 one by one. The two first sliders 112 are respectively installed at the front ends of the corresponding support rods 12. The slide rail 111 is horizontally arranged at the front ends of the two support rods 12 along the left and right directions, and the two first sliders 112 are both slidably connected to the slide rail 111. Each of the first sliders 112 can slide along its length direction on the slide rail 111 under the action of external force. The two first locking members 113 are respectively installed on the corresponding first sliders 112, which are used to fix the corresponding first slider 112 at any position of its sliding track. It has a simple structure, is easy to adjust, and is flexible to use.

[0035] In the above technical solution, the slide rail 111 is a rod body, the first sliding block 112 is provided with a first sliding hole penetrating the first sliding block 112 in the left-right direction, and the first sliding hole cooperates with the slide rail 111, and the slide rail 111 passes through the first sliding holes of the two first sliding blocks 112 to be slidably connected thereto, and the structure is simple, and the entire positioning member can be disassembled when not in use. The cross section of the slide rail is a regular polygon, and the first sliding hole is a regular polygon hole that cooperates therewith, so that the two first sliding blocks 112 can be prevented from rotating on the slide rail.

[0036] Among them, in the above technical solution, the first locking member 113 is a bolt, and each of the first sliding blocks 112 is provided with a first screw hole threadedly matched with the first locking member 113 along the front-to-back direction, and one end of the first screw hole is connected to the first sliding hole, and the first locking members 113 are respectively installed in the first screw holes on the corresponding first sliding blocks 112 and threadedly connected thereto, with the threaded end facing the corresponding first sliding hole, tightening the first locking member 113 so that its threaded end abuts against the slide rail 111 to fix the corresponding first sliding block 112 on the slide rail 111, or loosening the first locking member 113 to loosen the first sliding block 112, it has a simple structure, good fastening effect, and is easy to disassemble and assemble.

[0037] like Figure 3As shown, the connecting member 3 in the above technical solution includes a connecting rod 31, a second slider 32, a second locking member 33 and a third locking member 34, the second slider 32 is slidably installed at the corresponding end of the hoop frame 1, the connecting rod 31 is vertically arranged and slidably connected with the corresponding second slider 32, the lower end of the connecting rod 31 is connected to the corresponding ear support 2, the second slider 32 can slide along the front and rear length direction at the corresponding end of the hoop frame 1 under the action of external force, or slide along the up and down direction on the corresponding connecting rod 31, and the second locking member 33 and the third locking member 34 are both installed on the corresponding second slider 32, the second locking member 33 is used to fix the corresponding second slider 32 at any position of its sliding track at the corresponding end of the hoop frame 1, and the third locking member 34 is used to fix the corresponding second slider 32 at any position of its sliding track at the corresponding end of the hoop frame 1, so that the position of the ear support can be adjusted by adjusting the position of the second slider on the hoop frame and the connecting rod, so that the adaptability of the entire positioning member is stronger.

[0038] In the above technical solution, the second sliding block 32 is provided with a second sliding hole along the front-to-back direction to match the corresponding end of the hoop frame 1, and is provided with a third sliding hole along the up-down direction to match the corresponding connecting rod 31, and the second sliding hole and the third sliding hole are staggered, the corresponding end of the hoop frame 1 passes through the second sliding hole corresponding to the second sliding block and the two are slidably connected, the upper end of the connecting rod 31 passes through the third sliding hole corresponding to the second sliding block, and the two are slidably connected, the structure is simple and the adjustment is convenient, and the entire positioning component can meet the needs of different patients.

[0039] In the above technical solution, the second locking member 33 and the third locking member 34 are both bolts, and the second sliding block is provided with a second screw hole threadedly matched with the second locking member 33 and a third screw hole threadedly matched with the third locking member 34, one end of the second screw hole is connected with the corresponding second sliding hole, and one end of the third screw hole is connected with the corresponding third sliding hole, the second locking member 33 is threadedly installed in the corresponding second screw hole, and the threaded end of the second locking member 33 faces the corresponding second sliding hole, the third locking member 34 is threadedly installed in the corresponding third screw hole, and the The threaded end of the third locking piece 34 faces the corresponding third sliding hole. Tighten the second locking piece 33 to fix the corresponding second slider 32 at any position of the sliding track on the corresponding end of the hoop frame 1, or loosen the second locking piece 33 to release the second slider 32 from the hoop frame 1. Tighten the third locking piece 34 to fix the corresponding second slider 32 at any position of the sliding track on the corresponding connecting rod, or loosen the third locking piece 34 to release the corresponding second slider 32 from the corresponding connecting rod 31. The structure is simple and fastening is convenient.

[0040] like Figure 4 As shown, the ear support 2 in the above technical solution includes an earplug 21, a connecting block 22 and a fourth locking member 23. The connecting block 22 is vertically provided with a fourth sliding hole running through it from top to bottom. The lower end of the connecting rod 31 passes through the fourth sliding hole. The connecting block 22 can slide along its length direction on the connecting rod 31. The earplug 21 is arranged on the side wall of the connecting block 22, which is used to be inserted into the patient's external auditory canal. The fourth locking member 23 is installed on the connecting block 22, which is used to fix the connecting block 22 at any position of its sliding track, so that the horizontal height of the earplug relative to the hoop frame can be adjusted to meet the needs of patients of different ages and body shapes.

[0041] The fourth locking piece 23 in the above technical solution is a bolt, and the connecting block 22 is provided with a fourth screw hole threadedly matched with the fourth locking piece 23, one end of the fourth screw hole is connected with the fourth sliding hole, and the fourth locking piece 23 is threadedly installed in the fourth screw hole, and the threaded end of the fourth locking piece 23 faces the fourth sliding hole. The fourth locking piece 23 is tightened to fix the corresponding connecting block 22 at any position of the sliding track on the corresponding connecting rod 31, or the fourth locking piece 23 is loosened to loosen the corresponding connecting block 22 from the corresponding connecting rod 31. It has a simple structure and is easy to lock.

[0042] The earplug described in the above technical solution is a rubber component, and plugging it in the external auditory canal is beneficial to reducing the pressure of the ear on the external auditory canal and improving the comfort of the patient.

[0043] Among them, the first locking member, the second locking member, the third locking member and the fourth locking member are similar to the locking bolts on the vernier caliper.

[0044] Among them, preferably, the cross-sections of the two ends of the hoop frame are circular (that is, the cross-section of the rear end of each support rod is circular), and the cross-section of the connecting rod is circular, so that the second slider can rotate relative to the end of the hoop frame, and the connecting rod can rotate relative to the second slider to more flexibly adjust the spatial position of the two ear supports.

[0045] The front ends of the two support rods can be bent in an arc shape to be close to each other, and the specific Figure 1 As shown. Further preferably, the cross section of the front end of each support rod is "L" shaped, and the notch faces forward, so that when the external traction bracket is installed, the bottom end of the groove is placed in the "L" shaped notch at the front end of the two support rods.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A positioning member for a traction stent, characterized in that: The invention comprises a hoop frame (1) and two ear support members (2), wherein the hoop frame (1) is a horizontally arranged U-shaped member, which is used to be clamped on the patient's head, with its bottom groove facing forward, and is used to be placed on the patient's forehead, the two ear support members (2) are respectively placed below the two ends of the hoop frame (1), and the two ends of the hoop frame (1) are respectively connected to the ear support members (2) located below them through a connecting member (3), and the two ear support members (2) are respectively used to be placed in the ears of the patient on both sides to support the hoop frame (1); the hoop frame (1) comprises a width adjusting member (11) and two connecting members (11) arranged in the front-to-back direction and spaced apart in the left-to-right direction. The invention relates to a support rod (12), wherein the front ends of the two support rods (12) are connected to the width adjusting member (11), and the width adjusting member (11) is used to adjust the spacing distance between the two support rods (12). The rear ends of the two support rods (12) constitute the two ends of the hoop frame (1); the connecting member (3) comprises a connecting rod (31), a second slider (32), a second locking member (33) and a third locking member (34), wherein the second slider (32) is slidably mounted on the corresponding end of the hoop frame (1), the connecting rod (31) is vertically arranged and slidably connected to the corresponding second slider (32), and the connecting rod (31) is The lower end is connected to the corresponding ear support member (2); the second slider (32) can slide along the front-to-back length direction at the corresponding end of the hoop frame (1) under the action of external force, or slide up and down relative to the corresponding connecting rod (31); the second locking member (33) and the third locking member (34) are both installed on the corresponding second slider (32); the second locking member (33) is used to fix the corresponding second slider (32) at any position of its sliding track at the corresponding end of the hoop frame (1); the third locking member (34) is used to fix the corresponding second slider (32) at its position on the corresponding connecting rod (31) ) at any position of the sliding track of the ear support member (2); the ear support member (2) comprises an earplug (21), a connecting block (22) and a fourth locking member (23); the connecting block (22) is provided with a fourth sliding hole vertically penetrating the connecting block (22) from top to bottom; the lower end of the connecting rod (31) passes through the fourth sliding hole; the connecting block (22) can slide on the connecting rod (31) along its length direction; the earplug (21) is arranged on the side wall of the connecting block (22) and is used to be inserted into the patient's external auditory canal; the fourth locking member (23) is installed on the connecting block (22) and is used to fix the connecting block (22) at any position of its sliding track.

2. The positioning member of the traction stent according to claim 1, characterized in that: The width adjustment member (11) comprises a slide rail (111), two first sliders (112) and two first locking members (113); the two first sliders (112) correspond to the two first locking members (113) one by one; the two first sliders (112) are respectively mounted at the front ends of the corresponding support rods (12); the slide rail (111) is horizontally arranged at the front ends of the two support rods (12) in the left-right direction; the two first sliders (112) are both slidably connected to the slide rail (111); each first slider (112) can slide along the length direction of the slide rail (111) under the action of external force; the two first locking members (113) are respectively mounted on the corresponding first sliders (112) and are used to fix the corresponding first slider (112) at any position of its sliding track.

3. The positioning member of the traction stent according to claim 2, characterized in that: The slide rail (111) is a rod body, and the first sliding block (112) is provided with a first sliding hole penetrating the first sliding block in the left-right direction, and the first sliding hole matches the slide rail (111), and the slide rail (111) passes through the first sliding holes of the two first sliding blocks (112) to be slidably connected thereto.

4. The positioning member of the traction stent according to claim 3, characterized in that: The first locking member (113) is a bolt. Each of the first sliding blocks (112) is provided with a first screw hole in the front-to-back direction and threadedly matched with the first locking member (113), and one end of the first screw hole is connected with the first sliding hole. The first locking members (113) are respectively installed in the first screw holes on the corresponding first sliding blocks (112) and threadedly connected thereto, with the threaded end facing the corresponding first sliding hole. The first locking member (113) is tightened so that its threaded end abuts against the sliding rail (111) to fix the corresponding first sliding block (112) on the sliding rail (111), or the first locking member (113) is loosened to loosen the first sliding block (112).

5. The positioning member of the traction stent according to claim 1, characterized in that: The second slide block (32) is provided with a second slide hole matched with the corresponding end of the hoop frame (1) along the front-to-back direction, and a third slide hole matched with the corresponding connecting rod (31) is provided along the top-to-bottom direction, and the second slide hole and the third slide hole are arranged alternately, the corresponding end of the hoop frame (1) passes through the corresponding second slide hole of the second slide block (32), and the two are slidably connected, and the upper end of the connecting rod (31) passes through the corresponding third slide hole of the second slide block (32), and the two are slidably connected.

6. The positioning member of the traction stent according to claim 5, characterized in that: The second locking member (33) and the third locking member (34) are both bolts, and the second sliding block is provided with a second screw hole threadedly matched with the second locking member (33), and a third screw hole threadedly matched with the third locking member (34), one end of the second screw hole is connected to the corresponding second sliding hole, and one end of the third screw hole is connected to the corresponding third sliding hole, the second locking member (33) is threadedly installed in the corresponding second screw hole, and the threaded end of the second locking member (33) faces the corresponding second sliding hole, the third locking member (34) is threadedly installed in the corresponding third screw hole, and the third locking member The threaded end of the second locking member (34) is directed toward the corresponding third sliding hole, and the second locking member (33) is tightened to fix the corresponding second sliding block (32) at any position of the sliding track on the corresponding end of the hoop frame (1), or the second locking member (33) is loosened to release the second sliding block (32) from the hoop frame (1), and the third locking member (34) is tightened to fix the corresponding second sliding block (32) at any position of the sliding track on the corresponding connecting rod (31), or the third locking member (34) is loosened to release the corresponding second sliding block (32) from the corresponding connecting rod (31).

7. The positioning member of the traction stent according to claim 1, characterized in that: The fourth locking member (23) is a bolt, and the connecting block (22) is provided with a fourth screw hole threadedly matched with the fourth locking member (23), one end of the fourth screw hole is connected with the fourth sliding hole, and the fourth locking member (23) is threadedly installed in the fourth screw hole, and the threaded end of the fourth locking member (23) faces the fourth sliding hole, and the fourth locking member (23) is tightened to fix the corresponding connecting block (22) at any position of the sliding track on the corresponding connecting rod (31), or the fourth locking member (23) is loosened to loosen the corresponding connecting block (22) from the corresponding connecting rod (31).

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