CN221205502U - Disposable endoscope sampling forceps with rotatable forceps head - Google Patents

Abstract

The utility model discloses a pair of disposable endoscope sampling forceps with rotatable forceps heads, which comprises a handle, a forceps head assembly, a slip ring assembly, a spring tube, a rotating assembly and a steel wire rope, wherein the slip ring assembly is slidably arranged on the handle, one end of the steel wire rope penetrates through the handle and is fixedly connected with the slip ring assembly, the other end of the steel wire rope is fixedly connected with the forceps head assembly, the spring tube is sleeved outside the steel wire rope, one end of the spring tube is rotatably connected with the handle, the other end of the spring tube is rotatably connected with the forceps head assembly through a rotating assembly, the rotating assembly comprises a fixed sleeve, a connecting sleeve and a rotating sleeve, and the fixed sleeve is fixedly arranged on the forceps head assembly. The clamp head assembly is rotatable, the angle of the clamp head is convenient to adjust, the clamp head is convenient to grasp, the spring tube cannot rotate, friction between the spring tube and a human body cavity is reduced, and therefore pain of a patient is relieved.

Description

Disposable endoscope sampling forceps with rotatable forceps head

Technical Field

The utility model relates to the technical field of medical appliances, in particular to a disposable endoscope sampling forceps with rotatable forceps heads.

Background

At present, since the gastroscopy, enteroscopy and other endoscopy can visually observe the lesions of gastrointestinal parts, the method is a common clinical examination means at present, in the endoscopy process, doctors also often use biopsy forceps, firstly, the biopsy forceps directly reach the inside of a patient by means of an endoscope, a certain amount of lesion tissues are taken out of the patient by means of cutting, clamping or puncturing and the like for pathological examination, and definite histopathological diagnosis can be made for most of the examination cases, so that the examination method is the most convenient and efficient way for obtaining pathological diagnosis of the lesion tissues in the human body, and the biopsy forceps are widely applied to clinical endoscopy.

Chinese patent with publication No. CN204468156U discloses a biopsy forceps, which comprises a handle, a fixing sleeve, a catheter and a forceps head connected in sequence, wherein the middle part of the fixing sleeve is provided with a cavity, the outer side of the fixing sleeve is sleeved with a control ring, the control ring is connected with the forceps head through steel wires in the fixing sleeve and the catheter, the control ring is rotatable, and the catheter and the forceps head can be driven to rotate together by rotating the control ring, so that the degree rotation of the forceps head is realized, and the biopsy forceps can be sampled accurately. In application, the catheter and the forceps head are connected and extend into the human body cavity together, and when the catheter and the forceps head rotate together, the catheter rubs with the human body cavity, so that the pain of a patient can be aggravated.

Disclosure of utility model

The technical problems to be solved by the utility model are as follows: the utility model overcomes the defects of the prior art, and provides a disposable endoscope sampling forceps with rotatable forceps head, which has the advantages that the forceps head component is rotatable, the angle of the forceps head is convenient to adjust, the forceps head is convenient to grasp, the spring tube can not rotate, the friction between the spring tube and the human body cavity is reduced, and the pain of patients is relieved.

In order to solve the technical problems, the technical scheme of the utility model is as follows: the utility model provides a rotatable disposable endoscope sampling clamp of binding clip, includes handle, binding clip subassembly, slip ring subassembly, spring pipe, rotation subassembly and wire rope, slip ring subassembly slidable sets up on the handle, wire rope's one end pass behind the handle with slip ring subassembly fixed connection, wire rope's the other end with binding clip subassembly fixed connection, the spring pipe cover is established wire rope's outside, spring pipe's one end with handle rotationally connects, spring pipe's the other end pass through rotation subassembly with binding clip subassembly rotationally connects, rotation subassembly includes adapter sleeve, adapter sleeve and rotation sleeve, adapter sleeve fixed mounting on the binding clip subassembly, the adapter sleeve fixed sleeve is established the outside of spring pipe, rotation sleeve's one end stretch into in the adapter sleeve and with adapter sleeve fixed connection, rotation sleeve's the other end stretch into in the adapter sleeve just the rotation is relative adapter sleeve rotationally.

Further, the slip ring assembly comprises a slip ring, a fixing clamp and a connecting pipe, wherein the fixing clamp is slidably arranged on the handle, the slip ring is slidably sleeved outside the handle, the fixing clamp is fixedly connected with the slip ring, the connecting pipe is fixedly arranged on the fixing clamp, and one end of the steel wire rope is fixedly connected with the fixing clamp.

Further, a chute is axially formed in the handle, the fixing clamp is slidably arranged in the chute, two opposite protrusions are arranged on the fixing clamp, clamping grooves corresponding to the protrusions are formed in the side wall of the sliding ring, and the protrusions on the fixing clamp can penetrate through the clamping grooves on the sliding ring and are clamped into the clamping grooves.

Further, the binding clip subassembly includes jaw seat, left binding clip, right binding clip, first connecting rod and second connecting rod, left side binding clip with right binding clip symmetry is installed on the jaw seat, just left side binding clip with right binding clip is relative the jaw seat is rotatable, the front end of first connecting rod with left binding clip is rotatable to be connected, the front end of second connecting rod with right binding clip is rotatable to be connected.

Further, the pliers head seat is provided with a mounting groove and a sliding hole communicated with the mounting groove, a pin shaft is fixedly arranged in the mounting groove, and the left pliers head and the right pliers head are rotatably arranged on the pin shaft.

Further, the binding clip subassembly still includes the slide bar, the one end of slide bar passes after the slide hole extend to in the spring pipe and with wire rope fixed connection, just the slide bar can be in the slide hole slides, the other end of slide bar is located in the mounting groove, just the slide bar is located one end fixedly connected with sliding plate in the mounting groove, the width of sliding plate is greater than the aperture of slide hole, first connecting rod with the rear end of second connecting rod all with the sliding plate rotationally connects, left side binding clip right binding clip first connecting rod with the second connecting rod constitutes parallelogram structure.

Further, the side that left binding clip with right binding clip is close to each other is shearing portion, left binding clip with the shearing portion of right binding clip is matched with zigzag structure.

Further, the handle is close to one end fixed mounting who clamps the head subassembly has the pipe guard, offer on the pipe guard and supply the through-hole that the spring pipe passed, the handle is gone up and is close to one end of pipe guard has been offered and has been acceptd the chamber, acceptd the chamber with the through-hole intercommunication on the pipe guard, it is equipped with rotatable sleeve to acceptd the intracavity, the one end of spring pipe is passed after passing the through-hole on the pipe guard stretches into in the sleeve and with sleeve fixed connection.

Further, the one end that the adapter sleeve kept away from the spring pipe inwards is protruding to be equipped with spacing arch, the adapter sleeve stretches into the one end of adapter sleeve outwards evagination is equipped with and supports and hold the edge, spacing arch with support and hold the terminal surface of the one side that the edge is close to each other and support and hold.

By adopting the technical scheme, the utility model has the following beneficial effects:

1. The shearing parts of the left clamp head and the right clamp head are of matched saw-tooth structures, and the shearing parts of the saw-tooth structures can be used for conveniently grabbing tissues at a part to be sampled;

2. The handle is rotated, the slip ring assembly and the steel wire rope rotate along with the slip ring assembly, and the steel wire rope drives the clamp head assembly to synchronously rotate, so that the angle position of the clamp head assembly is adjusted;

3. The two ends of the spring tube are respectively and rotatably connected with the handle and the clamp head assembly, and when the handle and the clamp head assembly rotate, the spring tube cannot rotate along with the handle and the clamp head assembly, so that friction between the spring tube and a human body cavity is reduced, and pain of a patient is relieved.

Drawings

FIG. 1 is a perspective view of a single use endoscopic sampling forceps with a rotatable forceps head according to the present utility model;

fig. 2 is an enlarged view of a portion a in fig. 1;

FIG. 3 is a schematic view of the structure of the jaw assembly (with the jaw base removed) of the present utility model;

FIG. 4 is a top view of FIG. 1;

FIG. 5 is a cross-sectional view taken along the direction B-B of FIG. 4;

Fig. 6 is an enlarged view of a portion C of fig. 5;

Fig. 7 is an enlarged view of a portion D of fig. 5;

Fig. 8 is an enlarged view of the portion E of fig. 5.

Reference numerals: 1. a handle; 2. a clamp head assembly; 3. a slip ring assembly; 4. a spring tube; 5. a rotating assembly;

6. a wire rope; 11. a chute; 12. a sheath sleeve; 13. a housing chamber; 14. a sleeve; 15. a first pull ring;

21. A clamp head seat; 22. a left clamp head; 23. a right clamp head; 24. a first link; 25. a second link;

26. A slide bar; 27. a pin shaft; 28. a sliding plate; 29. a shearing part; 211. a mounting groove; 212. a sliding hole;

31. A slip ring; 32. a fixing clamp; 33. a connecting pipe; 311. a clamping groove; 312. a second pull ring; 321. a protrusion;

51. Fixing the sleeve; 52. a connection sleeve; 53. rotating the sleeve; 521. a limit protrusion; 531. the holding edge.

Detailed Description

In order that the utility model may be more readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments that are illustrated in the appended drawings.

In this embodiment, a disposable endoscope sampling forceps with rotatable binding clip is provided, which comprises a handle 1, a binding clip assembly 2, a slip ring assembly 3, a spring tube 4, a rotating assembly 5 and a steel wire rope 6, wherein the slip ring assembly 3 is slidably arranged on the handle 1, one end of the steel wire rope 6 passes through the handle 1 and then is fixedly connected with the slip ring assembly 3, the other end of the steel wire rope 6 is fixedly connected with the binding clip assembly 2, the spring tube 4 is sleeved outside the steel wire rope 6, one end of the spring tube 4 is rotatably connected with the handle 1, and the other end of the spring tube 4 is rotatably connected with the binding clip assembly 2 through the rotating assembly 5.

In this embodiment, the slip ring assembly 3 includes a slip ring 31, a fixing clip 32 and a connecting tube 33, the fixing clip 32 is slidably disposed on the handle 1, the slip ring 31 is slidably sleeved outside the handle 1, the fixing clip 32 is fixedly connected with the slip ring 31, the connecting tube 33 is fixedly mounted on the fixing clip 32, and one end of the wire rope 6 is fixedly connected with the fixing clip 32. When the clamp head is used, the sliding ring 31 is pulled to slide relative to the handle 1, the fixing clamp 32 can be driven to slide synchronously, the connecting pipe 33 is driven to slide relative to the handle 1, the connecting pipe 33 drives the steel wire rope 6 to move, the other end of the steel wire rope 6 is fixedly connected with the clamp head assembly 2, and the clamp head assembly 2 can be controlled to move when the steel wire rope 6 moves.

Specifically, the handle 1 is provided with a chute 11 along the axial direction, the fixing clip 32 is approximately in a shape like a Chinese character 'ji', the fixing clip 32 is slidably arranged in the chute 11, the fixing clip 32 is provided with two opposite protrusions 321, the side wall of the sliding ring 31 is provided with a clamping groove 311 corresponding to the protrusions 321, and the protrusions 321 on the fixing clip 32 can pass through the clamping groove 311 on the sliding ring 31 and be clamped into the clamping groove 311, so that the fixing clip 32 and the sliding ring 31 can be fixedly connected. In this embodiment, the sliding ring 31 is sleeved on the handle 1, the fixing clip 32 is placed in the chute 11, the fixing clip 32 is an integrally formed plastic part, two protrusions 321 on the fixing clip 32 are pinched to be pressed inwards, the fixing clip 32 can be deformed, the two protrusions 321 are close to each other, the fixing clip 32 is completely retracted into the chute 11, the fixing clip 32 is moved, the fixing clip 32 is inserted into the sliding ring 31, the two protrusions 321 are abutted against the inner wall of the sliding ring 31, the fixing clip 32 is continuously pushed, when the protrusions 321 move to be aligned with the clamping grooves 311, the pressure applied to the fixing clip 32 is relieved, the protrusions 321 are clamped into the clamping grooves 311, and therefore assembly is completed.

In this embodiment, the clamp head assembly 2 includes a clamp head seat 21, a left clamp head 22, a right clamp head 23, a first connecting rod 24, a second connecting rod 25 and a sliding rod 26, the left clamp head 22 and the right clamp head 23 are symmetrically installed on the clamp head seat 21, the left clamp head 22 and the right clamp head 23 are rotatable relative to the clamp head seat 21, a shearing part 29 is arranged at one side of the left clamp head 22 and the right clamp head 23, which is close to each other, the shearing part 29 of the left clamp head 22 and the right clamp head 23 is in a matched saw-tooth structure, and the shearing part 29 of the saw-tooth structure can facilitate grasping tissue of a part to be sampled.

Specifically, the mounting groove 211 is formed in the clamp head seat 21, the pin shaft 27 is fixedly arranged in the mounting groove 211, the left clamp head 22 and the right clamp head 23 are rotatably mounted on the pin shaft 27, the clamp head seat 21 is also provided with a sliding hole 212 communicated with the mounting groove 211, one end of the sliding rod 26 penetrates through the sliding hole 212 and then extends into the spring tube 4 and is fixedly connected with the steel wire rope 6, the sliding rod 26 can slide in the sliding hole 212, the other end of the sliding rod 26 is positioned in the mounting groove 211, one end of the sliding rod 26 positioned in the mounting groove 211 is fixedly connected with a sliding plate 28, the width of the sliding plate 28 is larger than the aperture of the sliding hole 212, so that the sliding rod 26 cannot slide out from the sliding hole 212, the front end of the first connecting rod 24 is rotatably connected with the left clamp head 22, the front end of the second connecting rod 25 is rotatably connected with the right clamp head 23, the rear ends of the first connecting rod 24 and the second connecting rod 25 are rotatably connected with the sliding plate 28, the left clamp head 22, the right clamp head 23, the first connecting rod 24 and the second connecting rod 24 form a handle-shaped structure 24 and the second connecting rod 25, and the sliding rod 26 can synchronously slide the sliding rod 24 and the sliding rod 26 on the mounting groove 21 and the sliding seat 2, and the sliding rod 25 can move the sliding rod 22 and the sliding rod 25 and the sliding rod 2 is synchronously arranged on the sliding seat 1 and the sliding rod seat 22 and the sliding rod 22.

In this embodiment, a sheath tube 12 is fixedly mounted at one end of the handle 1 near the clamp head assembly 2, a through hole 121 for the spring tube 4 to pass through is formed in the sheath tube 12, one end of the sheath tube 12 is sleeved at the end of the handle 1, a containing cavity 13 is formed in one end of the handle 1 near the sheath tube 12, the containing cavity 13 is communicated with the through hole 121 on the sheath tube 12, a rotatable sleeve 14 is arranged in the containing cavity 13, and one end of the spring tube 4 passes through the through hole on the sheath tube 12 and then extends into the sleeve 14 and is fixedly connected with the sleeve 14, so that rotatable connection between the spring tube 4 and the handle 1 is realized.

In this embodiment, the handle 1 is further provided with a mounting channel 131 which is communicated with the chute 11 and the accommodating cavity 13, one end of the spring tube 4 passes through the through hole on the sheath tube sleeve 12 and then extends into the sleeve 14 in the accommodating cavity 13 and is fixedly connected with the sleeve 14, and the wire rope 6 passes through the spring tube 4 and then enters the chute 11 through the mounting channel 131 and is fixedly connected with the connecting tube 33 on the fixing clip 32.

In this embodiment, a first pull ring 15 is fixedly disposed at one end of the handle 1 far away from the sheath tube 12, and a second pull ring 312 is disposed on each of two opposite side walls of the sliding ring 31, wherein the first pull ring 15 is used for inserting a thumb of a user, the two second pull rings 312 are used for inserting an index finger and a middle finger of the user, and the three fingers are mutually matched to realize sliding of the sliding ring 31 relative to the handle 1.

In this embodiment, the rotating assembly 5 includes a fixed sleeve 51, a connecting sleeve 52 and a rotating sleeve 53, the fixed sleeve 51 is fixedly mounted at the end of the jaw base 21, the connecting sleeve 52 is fixedly sleeved outside the spring tube 4, one end of the rotating sleeve 53 extends into the fixed sleeve 51 and is fixedly connected with the fixed sleeve 51, the other end of the rotating sleeve 53 extends into the connecting sleeve 52, and the rotating sleeve 53 is rotatable relative to the connecting sleeve 52.

Specifically, the fixed sleeve 51, the connecting sleeve 52 and the rotating sleeve 53 are all hollow tubular structures, so that one end of the sliding rod 26 can sequentially pass through the fixed sleeve 51, the connecting sleeve 52 and the rotating sleeve 53 after passing through the sliding hole 212 and extend into the spring tube 4 to be fixedly connected with the steel wire rope 6, in order to prevent the rotating sleeve 53 from being separated from the connecting sleeve 52, a limiting protrusion 521 is convexly arranged inwards at one end of the connecting sleeve 52 away from the spring tube 4, an abutting edge 531 is convexly arranged outwards at one end of the rotating sleeve 53 extending into the connecting sleeve 52, and the limiting protrusion 521 abuts against the end face of one side, close to the abutting edge 531, of the rotating sleeve 53. When the clamp head is used, the handle 1, the slip ring assembly 3 and the steel wire rope 6 rotate along with the handle, the steel wire rope 6 drives the clamp head assembly 2 to rotate synchronously, so that the position of the clamp head assembly 2 is controlled, and meanwhile, as the two ends of the spring tube 4 are respectively and rotatably connected with the handle 1 and the clamp head assembly 2, when the handle 1 and the clamp head assembly 2 rotate, the spring tube 4 cannot rotate along with the handle, so that friction between the clamp head assembly and a human body cavity is reduced, and pain of a patient is relieved.

The application flow of the utility model is as follows: the sampling forceps are assembled, the forceps head assembly 2 and the spring tube 4 are sent to a target position in a human body cavity, the handle 1 is rotated, the slip ring assembly 3 and the steel wire rope 6 rotate along with the handle, the steel wire rope 6 drives the forceps head assembly 2 to synchronously rotate, so that the position of the forceps head assembly 2 is adjusted, the sliding ring 31 is pulled to slide relative to the handle 1, the fixing clamp 32 can be driven to synchronously slide, the connecting tube 33 is driven to slide relative to the handle 1, the connecting tube 33 drives the steel wire rope 6 to move, the other end of the steel wire rope 6 is fixedly connected with the forceps head assembly 2, when the handle 1 assembly drives the steel wire rope 6 to move, the sliding rod 26 can synchronously slide relative to the forceps head seat 21 in the sliding hole 212, the sliding plate 28 fixedly installed on the sliding rod 26 moves along with the sliding rod, the mounting plate drives the first connecting rod 24 and the second connecting rod 25 to act, and accordingly the left forceps head 22 and the right forceps head 23 are controlled to open and close, the left forceps head 22 and the right forceps head 23 are matched with the shearing part 29, tissues of the part to be sampled are grabbed, and the two ends of the spring tube 4 are respectively connected with the handle 1 and the forceps head assembly 2 in a rotatable mode, pain of the patient is relieved when the forceps head assembly 1 and the spring tube 4 rotates relative to the human body cavity, and the human body cavity is not rotated.

The technical problems, technical solutions and advantageous effects solved by the present utility model have been further described in detail in the above-described embodiments, and it should be understood that the above-described embodiments are only illustrative of the present utility model and are not intended to limit the present utility model, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present utility model should be included in the scope of protection of the present utility model.

Claims (9)

1. The utility model provides a rotatable disposable endoscope sampling clamp of binding clip, includes handle (1), binding clip subassembly (2), slip ring subassembly (3), spring pipe (4), rotating assembly (5) and wire rope (6), slip ring subassembly (3) slidable ground sets up on handle (1), after one end of wire rope (6) passes handle (1) with slip ring subassembly (3) fixed connection, the other end of wire rope (6) with binding clip subassembly (2) fixed connection, spring pipe (4) cover is established the outside of wire rope (6), its characterized in that: one end of the spring tube (4) is rotatably connected with the handle (1), the other end of the spring tube (4) is rotatably connected with the clamp head assembly (2) through a rotating assembly (5), the rotating assembly (5) comprises a fixed sleeve (51), a connecting sleeve (52) and a rotating sleeve (53), the fixed sleeve (51) is fixedly arranged on the clamp head assembly (2), the connecting sleeve (52) is fixedly sleeved outside the spring tube (4), one end of the rotating sleeve (53) extends into the fixed sleeve (51) and is fixedly connected with the fixed sleeve (51), and the other end of the rotating sleeve (53) extends into the connecting sleeve (52) and is rotatable relative to the connecting sleeve (52).

2. A single use endoscopic sampling forceps with rotatable forceps head according to claim 1, wherein: slip ring subassembly (3) are including slip ring (31), fixation clamp (32) and connecting pipe (33), fixation clamp (32) slidable ground sets up on handle (1), slip ring (31) slidable cover is established the outside of handle (1), just fixation clamp (32) with slip ring (31) fixed connection, connecting pipe (33) fixed mounting is in on fixation clamp (32), the one end of wire rope (6) with fixation clamp (32) fixed connection.

3. A single use endoscopic sampling forceps with rotatable forceps head according to claim 2, wherein: the sliding chute (11) is axially formed in the handle (1), the fixing clamp (32) is slidably arranged in the sliding chute (11), two opposite protrusions (321) are arranged on the fixing clamp (32), clamping grooves (311) corresponding to the protrusions (321) are formed in the side wall of the sliding ring (31), and the protrusions (321) on the fixing clamp (32) can penetrate through the clamping grooves (311) in the sliding ring (31) and are clamped into the clamping grooves (311).

4. A single use endoscopic sampling forceps with rotatable forceps head according to claim 1, wherein: the clamp head assembly (2) comprises a clamp head seat (21), a left clamp head (22), a right clamp head (23), a first connecting rod (24) and a second connecting rod (25), wherein the left clamp head (22) and the right clamp head (23) are symmetrically arranged on the clamp head seat (21), the left clamp head (22) and the right clamp head (23) are rotatable relative to the clamp head seat (21), the front end of the first connecting rod (24) is rotatably connected with the left clamp head (22), and the front end of the second connecting rod (25) is rotatably connected with the right clamp head (23).

5. A single use endoscopic sampling forceps with rotatable forceps head as defined in claim 4, wherein: the clamp head seat (21) is provided with a mounting groove (211) and a sliding hole (212) communicated with the mounting groove (211), a pin shaft (27) is fixedly arranged in the mounting groove (211), and the left clamp head (22) and the right clamp head (23) are rotatably arranged on the pin shaft (27).

6. A single use endoscopic sampling forceps with rotatable forceps head as defined in claim 5, wherein: the pliers head assembly (2) further comprises a sliding rod (26), one end of the sliding rod (26) penetrates through the sliding hole (212) and then extends into the spring tube (4) and is fixedly connected with the steel wire rope (6), the sliding rod (26) can slide in the sliding hole (212), the other end of the sliding rod (26) is located in the mounting groove (211), one end of the sliding rod (26) located in the mounting groove (211) is fixedly connected with a sliding plate (28), the width of the sliding plate (28) is larger than the aperture of the sliding hole (212), the rear ends of the first connecting rod (24) and the second connecting rod (25) are rotatably connected with the sliding plate (28), and the left pliers head (22), the right pliers head (23), the first connecting rod (24) and the second connecting rod (25) form a parallelogram structure.

7. A single use endoscopic sampling forceps with rotatable forceps head as defined in claim 4, wherein: the left clamp head (22) and the right clamp head (23) are provided with shearing parts (29) on the sides close to each other, and the shearing parts (29) of the left clamp head (22) and the right clamp head (23) are of matched saw-tooth structures.

8. A single use endoscopic sampling forceps with rotatable forceps head according to claim 1, wherein: the novel pliers comprise a pliers head assembly and is characterized in that a pipe protecting sleeve (12) is fixedly arranged at one end of the handle (1) close to the pliers head assembly (2), a through hole for a spring pipe (4) to pass through is formed in the pipe protecting sleeve (12), a containing cavity (13) is formed in one end of the handle (1) close to the pipe protecting sleeve (12), the containing cavity (13) is communicated with the through hole in the pipe protecting sleeve (12), a rotatable sleeve (14) is arranged in the containing cavity (13), and one end of the spring pipe (4) penetrates through the through hole in the pipe protecting sleeve (12) and then stretches into the sleeve (14) to be fixedly connected with the sleeve (14).

9. A single use endoscopic sampling forceps with rotatable forceps head according to claim 1, wherein: one end of the connecting sleeve (52) far away from the spring tube (4) is internally provided with a limiting protrusion (521) in a protruding mode, one end of the rotating sleeve (53) extending into the connecting sleeve (52) is outwards provided with a supporting edge (531) in a protruding mode, and the limiting protrusion (521) abuts against the end face of one side, close to the supporting edge (531), of the connecting sleeve.