Finger-worn surgical instrument

Abstract

The present invention discloses a finger-worn surgical instrument, belonging to the technical field of minimally invasive surgical tools. The finger-worn surgical instrument comprises a sleeve ring sleeved on the outside of any finger body and a tool head arranged at the left end of the sleeve ring, wherein the sleeve ring comprises an outer sleeve ring and an inner rubber ring fixedly connected to each other, and the inner rubber ring is located on the inner side of the outer sleeve ring, and the inner rubber ring contacts the finger body. The outer sleeve ring is sleeved at the middle part of the finger body, so that the surgical tool can be used more conveniently and replaced simply during the operation by the user, and the special position setting of the sleeve ring on the finger body facilitates the operation of the knife head, and at the same time, the user can hold other tools that are not convenient to be installed on the sleeve ring between the inner side of the bent finger and the palm, so that the utilization efficiency of the user's hand during the operation is increased, and the trouble of needing additional personnel to hold equipment or tools is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of minimally invasive surgical tools, and more specifically, to a finger-worn surgical instrument. Background Art

[0002] Minimally invasive surgery is a branch of medical science that uses tiny trauma or tiny approaches to deliver special instruments, physical energy or chemical agents into the human body to complete surgical operations such as inactivation, removal, repair or reconstruction of lesions, deformities and traumas in the human body to achieve the purpose of treatment. Its characteristic is that the trauma to patients is significantly less than that of corresponding traditional surgical operations. Laparoscopic minimally invasive surgical scalpels are suitable for use in hospitals, reproductive centers, delivery rooms and other medical and health fields. They are used during gynecological examinations, ET (embryo transplantation) and other operations, and are mainly used for hemostasis, electrocautery separation and cutting of soft tissues. Energy generating tools such as radio frequency power supplies output energy signals to energy-carrying surgical tools such as monopolar electroscalpels, bipolar electrocoagulation forceps, electric pens, and ultrasonic scalpels, thereby generating energy such as arcs, heat energy, and mechanical vibrations to implement coagulation and tissue cutting at the contact site.

[0003] When using existing minimally invasive scalpels, medical personnel usually cut human tissue by holding the electric knife installed in the pen knife. Once the pen knife is held, other tools cannot be held. Many tools are needed during the operation, and one can only put one down and then take another one or be assisted by a separate person. The operation is inconvenient. In addition, smoke is often generated when the electric knife is used to heat human tissue. In order to avoid affecting the surgeon's vision and causing harm to the human body, the doctor or assistant is generally required to hold a special suction device to remove smoke, human tissue or blood. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] In view of the problems existing in the prior art, the purpose of the present invention is to provide a finger-worn surgical instrument, which can make it easier for users to use surgical tools and simplify replacement during surgery. The special position of the sleeve ring on the finger body makes it easier to operate the blade for surgery. At the same time, other tools that are not convenient to install on the sleeve ring can be held between the inner side of the user's bent finger and the palm, thereby increasing the utilization efficiency of the user's hands during surgery and reducing the need for additional personnel to hold equipment or tools.

[0006] 2. Technical solution

[0007] To solve the above problems, the present invention adopts the following technical solutions.

[0008] A finger-worn surgical instrument comprises a sleeve ring sleeved on the outside of any finger body and a tool head arranged at the left end of the sleeve ring, the sleeve ring comprising an outer sleeve ring and an inner rubber ring fixedly connected to each other, and the inner rubber ring is located on the inner side of the outer sleeve ring, the inner rubber ring contacts the finger body, the outer sleeve ring is sleeved on the middle part of the finger body, the rear end of the outer sleeve ring is connected to a lead-out portion, and the lead-out portion is connected to an external power supply device, so that the user can use the surgical tool more conveniently and simply replace it during the operation, and the special position setting of the sleeve ring on the finger body facilitates the operation of the tool head, and at the same time, the user can hold other tools that are not convenient to be installed on the sleeve ring between the inner side of the bent finger and the palm, so that the user's hand utilization efficiency is increased during the operation, and the trouble of needing additional personnel to hold equipment or tools is reduced.

[0009] Furthermore, the outer sleeve adapter is made of an insulating and heat-insulating material, so that the outer sleeve adapter is not easily charged and thus not easily causes harm to the user. At the same time, the heat generated by the annular electric knife head during operation is not easily transferred to the finger body through the inner rubber ring and cause harm to the user.

[0010] Furthermore, the outer ends of the outer sleeve ring and the inner rubber ring are provided with a plurality of mutually interconnected ventilation holes, so that when the sleeve ring is sleeved on the finger body and the knife head is used for cutting, the part where the finger body and the sleeve ring are in contact is not easily congested due to long-term airtightness, thereby improving the user's comfort when using it.

[0011] Furthermore, the tool head is a cutter head, and a built-in cavity is excavated inside the sleeve ring near the upper side, and the built-in cavity is opened in the outer sleeve ring. A driving structure for driving the cutter head to rotate for cutting is fixed in the built-in cavity. A heating structure for providing heat to the cutter head is also provided in the built-in cavity. The heating structure is connected in series with the driving structure and is connected to an external circuit. When the tool head is a cutter head, the heating structure transfers heat to the cutter head, so that the cutter head is not easy to be too cold and irritate the patient's skin. At the same time, the heat carried by the cutter head can play a partial coagulation function, and the driving structure drives the cutter head to rotate and thus cut the skin tissue.

[0012] Furthermore, the blade head is located on the outer sleeve ring near the outside of the finger body, and the vertical distance between the blade head and the finger body is 2-6mm. When the user bends the finger body to a suitable angle, the blade head can be used for cutting without damaging the finger body. The suitable distance between the blade head and the finger body makes it difficult for the blade head to hinder the bending of the finger body or damage the finger body during the bending of the finger body.

[0013] Furthermore, the longitudinal distance between the blade head and the bottom end of the sleeve ring is greater than the longitudinal distance between the bottom end of the finger body and the bottom end of the sleeve ring. When the finger body is in a straightened state, the distance between the blade head and the sleeve ring is still greater than the distance between the finger body and the bottom end of the sleeve ring, thereby making it difficult for the bottom of the blade head to injure the finger body during the wearing of the sleeve ring.

[0014] Furthermore, the driving structure includes a first wire and a micro motor which are distributed from top to bottom and fixedly connected to each other. The upper end of the blade head passes through the bottom of the outer sleeve ring and extends into the built-in cavity to be fixed to the output end of the micro motor. The micro motor is fixed to the top of the built-in cavity. A threading hole is drilled at the top of the built-in cavity. The end of the first wire away from the micro motor passes through the threading hole and extends to the outside of the outer sleeve ring to be connected to an external circuit. When in use, the first wire is connected to an external power supply, the micro motor is started, and then the blade head is driven to cut the corresponding operation part of the patient's skin.

[0015] Furthermore, the heating structure includes an annular electric knife head and a second wire that are fixedly connected to each other, the annular electric knife head is fixed to the bottom end of the built-in cavity, the knife head is located on the inner side of the annular electric knife head and is slidably connected to the annular electric knife head, a connecting hole is drilled at the bottom end of the built-in cavity, the connecting hole is connected to the threading hole, the end of the second wire away from the annular electric knife head passes through the connecting hole and is combined with the first wire to form a lead-out portion and pass through the outside of the outer sleeve ring, so that the second wire is combined with the first wire and then passes through the outside of the outer sleeve ring, so that when performing surgery, the user only needs to connect the first wire to an external power supply to start the annular electric knife head and the micro motor at the same time, eliminating the trouble of setting up a separate circuit to start the annular electric knife head. After the first wire is connected to the power supply, the micro motor and the annular electric knife head are started at the same time, the annular electric knife head gradually generates heat and transfers the heat to the knife head.

[0016] Furthermore, the tool head is a suction tube, and the lead-out portion is the tail of the suction tube, that is, the lead-out portion is connected to an external negative pressure pump to discharge smoke, human tissue or blood generated during the surgical operation.

[0017] 3. Beneficial effects

[0018] Compared with the prior art, the advantages of the present invention are:

[0019] (1) This solution makes it easier for the user to use surgical tools and to replace them during surgery. The special position of the sleeve ring on the finger body makes it easier to operate the blade for surgery. At the same time, the user can hold other tools that are not convenient to install on the sleeve ring between the inner side of the curved finger and the palm, thereby increasing the efficiency of the user's hand during surgery and reducing the need for additional personnel to hold equipment or tools.

[0020] (2) The outer sleeve is made of an insulating and heat-insulating material, so that the outer sleeve is not easy to be charged and thus not easy to cause harm to the user. At the same time, the heat generated by the annular electric knife head when working is not easy to be transferred to the finger body through the inner rubber ring and cause harm to the user.

[0021] (3) The outer ends of the outer sleeve ring and the inner rubber ring are provided with a plurality of interconnected ventilation holes, so that when the sleeve ring is put on the finger body and the blade is used for cutting, the part where the finger body and the sleeve ring are in contact is not easily congested due to long-term airtightness, thereby improving the user's comfort when using the finger.

[0022] (4) The tool head is a cutting head. A built-in cavity is excavated inside the sleeve ring near the upper side. The built-in cavity is opened in the outer sleeve ring. A driving structure for driving the cutting head to rotate for cutting is fixed in the built-in cavity. A heating structure for providing heat to the cutting head is also provided in the built-in cavity. The heating structure is connected in series with the driving structure and is connected to an external circuit. When the tool head is a cutting head, the heating structure transfers heat to the cutting head, so that the cutting head is not easy to be too cold and irritate the patient's skin. At the same time, the heat carried by the cutting head can play a partial coagulation function. The driving structure drives the cutting head to rotate and then cuts the skin tissue.

[0023] (5) The cutter head is located on the outer sleeve ring near the outside of the finger body, and the vertical distance between the cutter head and the finger body is 2-6 mm. When the user bends the finger body to a suitable angle, the cutter head can be used for cutting without damaging the finger body. The suitable distance between the cutter head and the finger body makes it difficult for the cutter head to hinder the bending of the finger body or damage the finger body during the bending of the finger body.

[0024] (6) The longitudinal distance between the blade head and the bottom end of the sleeve ring is greater than the longitudinal distance between the bottom end of the finger body and the bottom end of the sleeve ring. When the finger body is in a straightened state, the distance between the blade head and the sleeve ring is still greater than the distance between the finger body and the bottom end of the sleeve ring, thereby making it difficult for the bottom of the blade head to injure the finger body during the wearing of the sleeve ring.

[0025] (7) The driving structure includes a first wire and a micro motor which are distributed from top to bottom and fixedly connected to each other. The upper end of the blade head passes through the bottom of the outer sleeve ring and extends into the internal cavity to be fixed to the output end of the micro motor. The micro motor is fixed to the top of the internal cavity. A threading hole is drilled in the top of the internal cavity. The end of the first wire away from the micro motor passes through the threading hole and extends to the outside of the outer sleeve ring to be connected to an external circuit. When in use, the first wire is connected to an external power supply, the micro motor is started, and then the blade head is driven to cut the corresponding operation part of the patient's skin.

[0026] (8) The heating structure includes an annular electric knife head and a second wire which are fixedly connected to each other. The annular electric knife head is fixed to the bottom end of the built-in cavity. The knife head is located on the inner side of the annular electric knife head and is slidably connected to the annular electric knife head. A connecting hole is drilled at the bottom end of the built-in cavity. The connecting hole is connected to the threading hole. One end of the second wire away from the annular electric knife head passes through the connecting hole and is combined with the first wire to form a lead-out portion and pass through the outside of the outer sleeve ring. The second wire is combined with the first wire and then passed through the outside of the outer sleeve ring. When performing surgery, the user only needs to connect the first wire to an external power supply to start the annular electric knife head and the micro motor at the same time, eliminating the trouble of setting up another circuit to start the annular electric knife head. After the first wire is connected to the power supply, the micro motor and the annular electric knife head are started at the same time. The annular electric knife head gradually generates heat and transfers the heat to the knife head.

[0027] (9) The tool head is a suction tube, and the lead-out part is the tail of the suction tube, that is, the lead-out part is connected to an external negative pressure pump to discharge smoke, human tissue or blood generated during the surgical operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the sleeve ring of the present invention when it is sleeved on the corresponding position outside the finger body;

[0029] Figure 2 It is a schematic cross-sectional structure diagram of the sleeve ring part of the present invention;

[0030] Figure 3 for Figure 2 The structural diagram at A in the middle;

[0031] Figure 4 It is a schematic diagram of the top view of the sleeve ring and the cutter head part of the present invention;

[0032] Figure 5 It is a schematic diagram of the structure of the sleeve ring and the cutter head of the present invention when cutting in a vertical state;

[0033] Figure 6 It is a schematic structural diagram of the suction tube of the present invention when it is installed in the sleeve ring.

[0034] Description of the numbers in the figure:

[0035] 1 finger body, 2 sleeve connecting ring, 21 outer sleeve connecting ring, 22 inner rubber ring, 23 threading hole, 241 connecting hole, 25 built-in cavity, 26 air vent, 3 knife head, 4 lead-out part, 41 first wire, 51 micro motor, 61 ring-shaped electric knife head, 62 second wire. DETAILED DESCRIPTION

[0036] The following will combine the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all the embodiments. All other embodiments obtained by ordinary technicians in this field without creative work based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0037] Embodiment 1:

[0038] See also Figure 1-6 A finger-worn surgical instrument includes a sleeve ring 2 sleeved on the outside of any finger body 1 and a tool head arranged at the left end of the sleeve ring 2. After the sleeve ring 2 is sleeved on the outside of the finger body 1, under the limiting tension of the first wire 41, the sleeve ring 2 is not easy to slip out of the finger body 1.

[0039] See also Figure 2 The sleeve ring 2 includes an outer sleeve ring 21 and an inner rubber ring 22 which are fixedly connected to each other, and the inner rubber ring 22 is located on the inner side of the outer sleeve ring 21, and the inner rubber ring 22 contacts the finger body 1. The outer sleeve ring 21 is sleeved on the middle part of the finger body 1 (i.e., the second joint of the finger body 1, the cross-sectional height of the sleeve ring 2 is less than the length of the second joint, so that when the finger body 1 is bent at a certain angle, the sleeve ring 2 is not easy to hinder the bending of the finger body 1). First, because the inner rubber ring 22 itself has a certain elasticity, When the sleeve ring 2 is sleeved on the outside of the finger body 1, the sleeve connection between the sleeve ring 2 and the finger body 1 is more firmly secured due to the elastic force of the inner rubber ring 22. Secondly, the provision of the inner rubber ring 22 can prevent the outer sleeve ring 21 from directly and rigidly contacting the finger body 1, thereby protecting the finger body 1 from being easily worn by the outer sleeve ring 21. Thirdly, the soft material of the inner rubber ring 22 increases the friction between the inner rubber ring 22 and the finger body 1, thereby preventing the sleeve ring 2 from sliding up and down on the finger body 1.

[0040] The outer sleeve 21 is made of insulating and heat-insulating material, so that the outer sleeve 21 is not easy to be charged and thus not easy to cause harm to the user. At the same time, the heat generated by the annular electric knife head 61 during operation is not easy to be transferred to the finger body 1 through the inner rubber ring 22 and cause harm to the user.

[0041] The outer ends of the outer connecting ring 21 and the inner rubber ring 22 are provided with a plurality of mutually interconnected air holes 26, so that when the connecting ring 2 is sleeved on the finger body 1 and the blade 3 is used for cutting, the contact part between the finger body 1 and the connecting ring 2 is not easy to cause local congestion of the finger body 1 due to airtightness for a long time, thereby improving the comfort of the user when using it.

[0042] The tool head is a cutter head 3, and a built-in cavity 25 is excavated inside the sleeve ring 2 near the upper side. The built-in cavity 25 is opened in the outer sleeve ring 21. A driving structure for driving the cutter head 3 to rotate for cutting is fixed in the built-in cavity 25. A heating structure for providing heat to the cutter head 3 is also provided in the built-in cavity 25. The heating structure is connected in series with the driving structure and is connected to an external circuit. When the tool head is the cutter head 3, the heating structure transfers heat to the cutter head 3, so that the cutter head 3 is not easy to be too cold and irritate the patient's skin. At the same time, the heat carried by the cutter head 3 can play a partial coagulation function, and the driving structure drives the cutter head 3 to rotate and thus cut the skin tissue.

[0043] The cutter head 3 is located on the outer sleeve ring 21 near the outside of the finger body 1, and the vertical distance between the cutter head 3 and the finger body 1 is 41 mm. When the user bends the finger body 1 to a suitable angle, the cutter head 3 can be used for cutting without damaging the finger body 1. The suitable distance between the cutter head 3 and the finger body 1 makes it difficult for the cutter head 3 to hinder the bending of the finger body 1 or damage the finger body 1 during the bending of the finger body 1.

[0044] The longitudinal distance between the blade head 3 and the bottom end of the sleeve ring 2 is greater than the longitudinal distance between the bottom end of the finger body 1 and the bottom end of the sleeve ring 2. When the finger body 1 is in a straightened state, the distance between the blade head 3 and the sleeve ring 2 is still greater than the distance between the finger body 1 and the bottom end of the sleeve ring 2, so that the bottom of the blade head 3 is not easy to hurt the finger body 1 during the wearing of the sleeve ring 2.

[0045] An internal cavity 25 is bored inside the sleeve ring 2 near the upper side, and a driving structure for driving the blade head 3 to rotate for cutting is fixedly arranged in the internal cavity 25 (the driving structure is a well-known technology for those skilled in the art), and the driving structure includes a first wire 41 and a micro motor 51 which are distributed from top to bottom and fixedly connected to each other, and the upper end of the blade head 3 passes through the bottom of the outer sleeve ring 21 and extends into the internal cavity 25 and is fixed to the output end of the micro motor 51, and the micro motor 51 is fixed to the top of the internal cavity 25, and a threading hole 23 is bored in the top of the internal cavity 25, and one end of the first wire 41 away from the micro motor 51 passes through the threading hole 23 and extends to the outside of the outer sleeve ring 21 and is connected to an external circuit. When in use, the first wire 41 is connected to an external power supply, and the micro motor 51 is started, thereby driving the blade head 3 to cut the corresponding operation part of the patient's skin.

[0046] The built-in cavity 25 is also provided with a heating structure for providing heat to the cutter head 3 (the heating structure is a well-known technology for those skilled in the art). The heating structure is connected in series with the driving structure and is connected to the external circuit. The heating structure includes an annular electric cutter head 61 and a second wire 62 that are fixedly connected to each other. The annular electric cutter head 61 is fixed to the bottom end of the built-in cavity 25. The cutter head 3 is located on the inner side of the annular electric cutter head 61 and is slidably connected to the annular electric cutter head 61. A connecting hole 241 is drilled at the bottom end of the built-in cavity 25. The connecting hole 241 is connected to the threading hole 23. The second wire 62 is away from the annular electric cutter head 61. The end passes through the connecting hole 241 and is combined with the first wire 41 to form a lead-out portion 4 that passes through the outside of the outer sleeve connecting ring 21, so that the second wire 62 is combined with the first wire 41 and then passes through the outside of the outer sleeve connecting ring 21. When performing an operation, the user only needs to connect the first wire 41 to an external power supply to start the annular electric knife head 61 and the micro motor 51 at the same time, eliminating the trouble of setting up another circuit to start the annular electric knife head 61. After the first wire 41 is connected to the power supply, the micro motor 51 and the annular electric knife head 61 are started at the same time, and the annular electric knife head 61 gradually generates heat and transfers the heat to the knife head 3.

[0047] The device is sterilized before and after use. The tool head is the blade head 3, and the lead-out part 4 is the wire. When the blade head 3 is needed for surgical operation, the user puts the sleeve ring 2 on the second joint of the finger body 1 and bends the finger body 1 to a certain degree so that the blade head 3 is in a vertical state. Please refer to Figure 4 , you can proceed with the subsequent surgical operation, please refer to Figure 6 When the tool head is a suction tube, the lead-out part 4 is the tail of the suction tube, and one end of the suction tube is fixedly connected to the sleeve ring 2, and is passed through the sleeve ring 2 to be connected to the negative pressure pump, that is, the lead-out part 4 is connected to the external negative pressure pump to discharge the smoke, human tissue or blood generated during the surgical operation, so that the sleeve ring 2 on one of the finger bodies 1 drives the blade 3 to perform a cutting operation, while the negative pressure pump starts working and discharges the smoke generated during the working process of the blade 3 through the suction tube, eliminating the need to arrange other staff to hold the suction device to discharge the smoke. Other tools needed in other surgical procedures can also be connected to the sleeve ring 2 and put on other finger bodies 1 except those with the blade 3.

[0048] Compared with the prior art, the present invention uses a sleeve ring 2 to replace the pen body in the prior art. By connecting different structures on the sleeve ring 2 and sleeved on the finger body 1 or making the sleeve ring 2 with different surgical tools sleeved on different finger bodies 1, the surgical tools are more convenient to use and simple to replace during the operation. The special position of the sleeve ring 2 on the finger body 1 makes it convenient to operate the blade for surgery. At the same time, other tools that are not convenient to be installed on the sleeve ring 2 can be held between the inner side of the user's bent finger and the palm, which increases the utilization efficiency of the user's hand during the operation and reduces the trouble of needing additional personnel to hold equipment or tools.

[0049] The above is only a preferred specific implementation manner of the present invention; but the protection scope of the present invention is not limited thereto; any technician familiar with the technical field within the technical scope disclosed by the present invention; any equivalent replacement or change based on the technical solution and improved concept of the present invention shall be covered by the protection scope of the present invention.

Claims

1. A finger-worn surgical instrument, characterized in that: The invention comprises a sleeve ring (2) sleeved on the outside of any finger body (1) and a tool head arranged at the left end of the sleeve ring (2), wherein the sleeve ring (2) comprises an outer sleeve ring (21) and an inner rubber ring (22) which are fixedly connected to each other, and the inner rubber ring (22) is located on the inner side of the outer sleeve ring (21), and the inner rubber ring (22) is in contact with the finger body (1), and the outer sleeve ring (21) is sleeved on the middle part of the finger body (1), and the rear end of the outer sleeve ring (21) is connected to a lead-out portion (4), and the lead-out portion (4) is connected to an external power supply device; The tool head is a cutter head (3), and a built-in cavity (25) is excavated inside the sleeve ring (2) near the upper side, and the built-in cavity (25) is opened in the outer sleeve ring (21). A driving structure for driving the cutter head (3) to rotate for cutting is fixed in the built-in cavity (25), and a heating structure for providing heat to the cutter head (3) is also provided in the built-in cavity (25), and the heating structure is connected in series with the driving structure and connected to an external circuit; The blade head (3) is located on the outer sleeve ring (21) at a position close to the outer side of the finger body (1), and the vertical distance between the blade head (3) and the finger body (1) is 2-6 mm; The driving structure comprises a first wire (41) and a micro motor (51) which are distributed from top to bottom and fixedly connected to each other. The upper end of the cutter head (3) passes through the bottom of the outer sleeve ring (21) and extends into the inner cavity (25) to be fixed to the output end of the micro motor (51). The micro motor (51) is fixed to the top end of the inner cavity (25). A threading hole (23) is drilled at the top end of the inner cavity (25). The end of the first wire (41) away from the micro motor (51) passes through the threading hole (23) and extends to the outside of the outer sleeve ring (21) to be connected to an external circuit. The heating structure comprises an annular electric knife head (61) and a second wire (62) which are fixedly connected to each other, the annular electric knife head (61) is fixed to the bottom end of the built-in cavity (25), the knife head (3) is located on the inner side of the annular electric knife head (61) and is slidably connected to the annular electric knife head (61), a connecting hole (241) is drilled at the bottom end of the built-in cavity (25), the connecting hole (241) is connected to the threading hole (23), and one end of the second wire (62) away from the annular electric knife head (61) passes through the connecting hole (241) and is combined with the first wire (41) to form a lead-out portion (4) that passes through the outside of the outer sleeve ring (21).

2. The finger-worn surgical instrument according to claim 1, characterized in that: The outer sleeve connecting ring (21) is made of insulating and heat-insulating material.

3. The finger-worn surgical instrument according to claim 1, characterized in that: The outer ends of the outer connecting ring (21) and the inner rubber ring (22) are provided with a plurality of mutually communicating air holes (26).

4. The finger-worn surgical instrument according to claim 1, characterized in that: The longitudinal distance between the blade head (3) and the bottom end of the sleeve ring (2) is greater than the longitudinal distance between the bottom end of the finger body (1) and the bottom end of the sleeve ring (2).

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