Nail abutting seat assembly with detachable guide head and anastomat thereof

Abstract

The utility model relates to the technical field of anastomat nail abutting seats, in particular to a nail abutting seat assembly with a detachable guide head and an anastomat with the same, and the nail abutting seat assembly comprises the guide head, a nail abutting seat and a detachable sleeve. A slideway is formed in one end of the nail propping seat; a lock tongue capable of entering or leaving the lock hole is arranged on the connecting section; when the lock tongue of the guide head is not clamped into the lock hole, the guide head can move along the slide way, after the lock tongue is clamped into the lock hole, the guide head can be fixed on the nail abutting seat, when an operator needs to detach the guide head, the detaching sleeve and the guide head can be clamped together firstly, then an unlocking rod on the detaching sleeve is pressed, and the guide head can be detached. When the guide head rotates, the unlocking end presses the spring bolt into the slide way from the lock hole, the degree of freedom of the guide head in the extending direction of the slide way is recovered, at the moment, the guide head can be driven to be separated from the nail abutting base by holding and moving the detaching sleeve, the unlocking rod can be loosened in the moving process, and an operator can detach the guide head from the nail abutting base easily and rapidly.

Description

Technical Field

[0001] The utility model relates to the technical field of stapler anvils, in particular to an anvil assembly with a detachable guide head, and also to a stapler comprising the anvil assembly with a detachable guide head. Background Art

[0002] Staplers are medical devices that replace manual suturing and are often used in gastrointestinal surgery to separate or anastomose tissues.

[0003] In the prior art, the front end of the anvil of the stapler is usually equipped with a guide head (also known as an eagle's beak head), which is used to extend into a narrow gap between tissues and organs, and then slowly extend the anvil into the gap to hook or separate the tissues at the surgical site. In this regard, Chinese patents such as publication numbers CN216854741U and CN219021342U disclose solutions in which a guide head is detachably provided at the front end of the anvil. However, although these guide heads can be detachably installed on the anvil, the actual situation is that when replacing the guide head, since the guide head is usually small, it is difficult for the operator to apply force to the guide head, resulting in difficulty in replacing the guide head. Utility Model Content

[0004] The technical problem to be solved by the utility model is: in order to solve the deficiencies in the prior art, a guide head anvil assembly is provided, and a stapler including the guide head anvil assembly is provided.

[0005] The utility model solves the technical problem by adopting the following technical solution: a guide head detachable anvil seat assembly, comprising a guide head, an anvil seat and a disassembly sleeve;

[0006] A slideway is provided at one end of the anvil seat, and a lock hole is penetrated through the inner wall of the slideway;

[0007] A connecting section extends from the guide head, and a locking tongue that can enter or leave the locking hole is provided on the connecting section. When the locking tongue on the connecting section inserted in the slideway is located in the locking hole, the guide head is fixed on the anvil seat; a first clamping structure is provided at one end of the guide head away from the connecting section;

[0008] The disassembly sleeve is provided with a second clamping structure and an unlocking rod, the second clamping structure is used to clamp with the first clamping structure, one end of the unlocking rod is fixedly connected to the disassembly sleeve or integrally formed, and the other end is a suspended unlocking end; when the first clamping structure of the disassembly sleeve and the second clamping structure of the guide head are clamped, the unlocking end is aligned with the lock tongue; when the unlocking rod is pressed so that the unlocking end presses the aligned lock tongue into the slide and separates from the lock hole, the connecting section can move along the slide and disengage from the pin seat.

[0009] Furthermore, the first clamping structure includes a clamping slot arranged on the guide head, and the second clamping structure includes a matching hole arranged on the disassembly sleeve. A window is opened on the hole wall of the matching hole, and an elastic hook is arranged in the window. When the guide head is inserted into the matching hole of the disassembly sleeve, the hook is clamped into the clamping slot.

[0010] Furthermore, one end of the hook is integrally formed with the inner wall of the window, and the other end is provided with a hook portion for embedding into the slot, and the hook portion has an inclined surface for moving the hook out of the matching hole when the guide head is inserted into the disassembly sleeve.

[0011] Furthermore, a locking rod extends from one end of the locking tongue, and a rotating shaft portion extends from the end of the locking rod away from the locking tongue. The rotating shaft portion is rotatably connected to the connection, and a spring sheet is also provided on the connecting section, and the spring sheet is used to push the locking tongue into the lock hole.

[0012] Furthermore, an axis groove is provided on the connecting section, the rotating shaft portion is inserted into the axis groove, one end of the spring sheet has a root, and the other end abuts against a locking tongue, the root is fixedly connected to the connecting section and blocks the notch of the axis groove.

[0013] Furthermore, a limiting groove matching the locking rod is formed on the connecting section, and the locking rod is located in the limiting groove.

[0014] Furthermore, the spring sheet is a metal sheet.

[0015] Furthermore, a flange is protruded from the connecting section, a guide groove is provided on the inner wall of the slideway at the side where the lock hole is located, and the flange is slidably installed in the guide groove.

[0016] Further, the guide groove is connected to the locking hole, the width of the cross section of the slideway in the direction perpendicular to the extension direction of the slideway is greater than the width of the cross section of the guide groove in the direction perpendicular to the extension direction of the slideway, and the width of the cross section of the guide groove in the direction perpendicular to the extension direction of the slideway is smaller than the width of the cross section of the locking hole in the direction perpendicular to the extension direction of the slideway; the unlocking end of the unlocking rod is configured to be able to move in the guide groove along the extension direction of the slideway.

[0017] The utility model also provides a stapler, comprising the above-mentioned guide head detachable anvil seat assembly.

[0018] The beneficial effect of the utility model is that when the locking tongue of the guide head is not inserted into the locking hole, the guide head can move along the slideway, and after the locking tongue is inserted into the locking hole, the guide head will be fixed on the nail seat. When the operator needs to remove the guide head, the disassembly sleeve and the guide head can be clamped together first, and then the unlocking rod on the disassembly sleeve can be pressed to make the unlocking end press the locking tongue from the lock hole into the slideway, thereby restoring the freedom of the guide head in the extension direction of the slideway. At this time, the guide head can be driven away from the nail seat by holding and moving the disassembly sleeve, and the unlocking rod can also be loosened during the movement, so that the operator can easily and quickly remove the guide head from the nail seat.

[0019] Other features and advantages of the present invention are specifically described in detail in the following exemplary embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 is a three-dimensional schematic diagram of a detachable anvil assembly of a guide head;

[0022] Figure 2 is a top view schematic diagram of a detachable anvil assembly of the guide head;

[0023] Figure 3 yes Figure 2 AA section view;

[0024] Figure 4 yes Figure 3 A partial enlarged schematic diagram of B in the middle;

[0025] Figure 5 It is a schematic diagram of the lock tongue being pressed into the slide from the lock hole;

[0026] Figure 6 is a three-dimensional schematic diagram of one side of the disassembly sleeve;

[0027] Figure 7 is a three-dimensional schematic diagram of the other side of the disassembly sleeve;

[0028] Figure 8 It is a three-dimensional schematic diagram of one side of the guide head;

[0029] Fig. 9 It is a three-dimensional schematic diagram of the other side of the guide head;

[0030] Fig.10 It is a three-dimensional schematic diagram of the locking tongue mounted on the guide head;

[0031] Fig.11 is a three-dimensional schematic diagram of an anvil;

[0032] Fig.12It is a three-dimensional schematic diagram of the engagement between the guide head and the anvil seat;

[0033] Fig.13 It is a three-dimensional schematic diagram of the lock tongue;

[0034] Fig.14 It is a three-dimensional schematic diagram of the shrapnel.

[0035] In the figure: 1, guide head, 11, connecting section, 111, shaft groove, 112, limiting groove, 113, flange, 12, clamping groove;

[0036] 2. anvil seat, 21. slideway, 22. lock hole, 23. guide groove;

[0037] 3. disassembly sleeve, 31. unlocking rod, 31a. unlocking end, 32. matching hole, 33. window, 34. hook, 341. hook part, 341a. inclined surface;

[0038] 4. lock tongue, 41. lock rod, 42. shaft portion;

[0039] 5. Shrapnel, 51. Root. DETAILED DESCRIPTION

[0040] The utility model is now described in further detail in conjunction with the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, so they only show the components related to the utility model, and the directions and references (for example, up, down, left, right, etc.) can only be used to help describe the features in the drawings. Therefore, the following specific embodiments are not adopted in a restrictive sense, and the scope of the subject matter claimed is limited only by the attached claims and their equivalents.

[0041] like Figure 1-14 As shown, a guide head detachable anvil seat assembly comprises a guide head 1, an anvil seat 2 and a disassembly sleeve 3;

[0042] A slideway 21 is provided at one end of the anvil seat 2, and a lock hole 22 is penetrated through the inner wall of the slideway 21;

[0043] The guide head 1 is used to hook or separate tissues at the surgical site. A connecting section 11 is extended from the guide head 1, that is, the connecting section 11 and the guide head 1 are integrally formed. A locking tongue 4 that can enter or leave the locking hole 22 is provided on the connecting section 11. When the locking tongue 4 on the connecting section 11 inserted in the slideway 21 is located in the locking hole 22, the guide head 1 is fixed on the anvil seat 2; a first clamping structure is provided at one end of the guide head 1 away from the connecting section 11;

[0044] A second clamping structure and an unlocking rod 31 are provided on the disassembly sleeve 3. The second clamping structure is used to clamp with the first clamping structure. One end of the unlocking rod 31 is fixedly connected to or integrally formed with the disassembly sleeve 3, and the other end is a suspended unlocking end 31a. When the first clamping structure of the disassembly sleeve 3 and the second clamping structure of the guide head 1 are clamped, the unlocking end 31a is aligned with the lock tongue 4. When the unlocking rod 31 is pressed so that the unlocking end 31a presses the aligned lock tongue 4 into the slide 21 and separates from the lock hole 22, the connecting section 11 can move along the slide 21 and disengage from the pin seat 2.

[0045] The guide head has a detachable anvil seat assembly. When the locking tongue 4 on the connecting section 11 of the guide head 1 is not inserted into the locking hole 22, the guide head 1 can move along the slide 21, and after the locking tongue 4 is inserted into the locking hole 22, the guide head 1 will be fixed on the anvil seat 2. When the operator needs to remove the guide head 1, the disassembly sleeve 3 and the guide head 1 can be snapped together first, and then the unlocking rod 31 on the disassembly sleeve 3 is pressed so that the unlocking end 31a presses the locking tongue 4 from the locking hole 22 into the slide 21, thereby restoring the freedom of the guide head 1 along the extension direction of the slide 21. At this time, the guide head 1 can be driven to disengage from the anvil seat 2 by holding and moving the disassembly sleeve 3, and the unlocking rod 31 can also be loosened during the movement, so that the operator can easily and quickly remove the guide head 1 from the anvil seat 2.

[0046] In some examples, the first snap-fitting structure includes a slot 12 provided on the guide head 1, and the second snap-fitting structure includes a matching hole 32 provided on the disassembly sleeve 3, the matching hole 32 matches the guide head 1, a window 33 is provided on the hole wall of the matching hole 32, and an elastic hook 34 is provided in the window 33, and when the guide head 1 is inserted into the matching hole 32 of the disassembly sleeve 3, the hook 34 is snapped into the slot 12; by first inserting the guide head 1 into the matching hole 32 of the disassembly sleeve 3, and after the guide head 1 reaches a predetermined position of the matching hole 32, the hook 34 is automatically snapped into the slot 12, that is, the guide head 1 is locked in the matching hole 32 by the hook 34, thereby improving the stability and reliability of the connection between the guide head 1 and the disassembly sleeve 3.

[0047] In some examples, one end of the hook 34 is integrally formed with the inner wall of the window 33, and the other end is provided with a hook portion 341 for embedding in the slot 12, and the hook portion 341 has an inclined surface 341a for moving the hook 34 toward the outside of the matching hole 32 when the guide head 1 is inserted into the disassembly sleeve 3; that is, in the process of the guide head 1 moving into the matching hole 32, a force will be generated on the hook portion 341 to deflect it outward, causing the hook 34 to elastically deform, and when the hook portion 341 is aligned with the slot 12, the hook 34 is reset to the slot 12 under its elastic action, thereby realizing the clamping connection between the guide head 1 and the disassembly sleeve 3; the inclined surface 341a can be but is not limited to a plane or an arc surface that gradually tilts toward the matching hole 32 in the direction in which the guide head 1 moves toward the matching hole 32.

[0048] In some examples, a locking rod 41 extends from one end of the lock tongue 4, and a rotating shaft portion 42 extends from the end of the lock rod 41 away from the lock tongue 4. The rotating shaft portion 42 is rotatably connected to the connecting section 11. The lock tongue 4, the locking rod 41 and the rotating shaft portion 42 can be formed as one piece. A spring piece 5 is also provided on the connecting section 11. The spring piece 5 can be but is not limited to a metal sheet to improve the elastic performance and can stably and reliably resist the lock tongue 4 for a long time. The spring piece 5 is used to push the lock tongue 4 to be located in the lock hole 22 so that the lock tongue 4 can maintain a state of being stuck in the lock hole 22; the lock tongue 4 rotatably installed on the connecting section 11 is pressed against the lock hole 22 by the spring piece 5, so that when the lock tongue 4 is pressed, it can be rotated into the slide 21 in an expected posture, thereby avoiding the lock tongue 4 from getting stuck and unable to enter the slide 21 when the lock tongue 4 is pressed.

[0049] In some examples, an axial groove 111 is opened on the connecting section 11, and the rotating shaft portion 42 is inserted into the axial groove 111. One end of the spring sheet 5 has a root 51, and the root 51 can be fixedly connected to the spring sheet 5 or integrally formed, and the other end of the spring sheet 5 is against the lock tongue 4, and the root 51 is fixedly connected to the connecting section 11 and blocks the notch of the axial groove 111; the rotating shaft portion 42 of the lock tongue 4 is blocked by the root 51 of the spring sheet 5, so that the fixed installation of the spring sheet 5 on the connecting section 11 and the rotating installation of the lock tongue 4 on the connecting section 11 can be realized at the same time, and the structure can be simplified.

[0050] In some examples, a limiting groove 112 matching the locking rod 41 is provided on the connecting section 11, and the locking rod 41 is located in the limiting groove 112, and the limiting groove 112 can extend to the inner wall of the shaft groove 111; by setting the limiting groove 112 to constrain the locking rod 41, jamming caused by deflection of the lock tongue 4 can be prevented.

[0051] In some examples, a flange 113 protrudes from the connecting section 11, and a guide groove 23 is opened on the inner wall of the slide 21 where the locking hole 22 is located, and the flange 113 is slidably installed in the guide groove 23; thereby realizing a sliding connection between the connecting section 11 and the nail seat 2.

[0052] In some examples, the guide groove 23 is connected to the locking hole 22, the width of the cross section of the slide 21 in the direction perpendicular to the extension direction of the slide 21 is greater than the width of the cross section of the guide groove 23 in the direction perpendicular to the extension direction of the slide 21, and the width of the cross section of the guide groove 23 in the direction perpendicular to the extension direction of the slide 21 is smaller than the width of the cross section of the locking hole 22 in the direction perpendicular to the extension direction of the slide 21, that is, the groove width of the guide groove 23 is smaller than the width of the slide 21, and the width of the locking hole 22 is greater than the width of the guide groove 23; the unlocking end 31a of the unlocking rod 31 is configured to be able to move in the guide groove 23 along the extension direction of the slide 21, so that when the disassembly sleeve 3 drives the guide head 1 to disengage from the nail seat 2, the unlocking rod 31 can maintain the pressure on the lock tongue 4.

[0053] In some examples, a stapler includes the above-mentioned guide head detachable anvil assembly.

[0054] The principle of the above-mentioned guide head detachable anvil assembly is:

[0055] When loading, align the connecting section 11 of the guide head 1 with the slideway 21, and then move the guide head 1 into the slideway 21. When the lock tongue 4 and the lock hole 22 are aligned, the spring piece 5 will push the lock tongue 4, so that the lock tongue 4 automatically bounces into the lock hole 22, thereby fixing the guide head 1 on the anvil seat 2;

[0056] During disassembly, first snap the disassembly sleeve 3 and the guide head 1 together, and then press the unlocking rod 31 on the disassembly sleeve 3 to make the unlocking end 31a apply pressure to the lock tongue 4. The lock tongue 4 overcomes the elastic force of the spring sheet 5 and moves into the slide 21, thereby restoring the freedom of the guide head 1 along the extension direction of the slide 21. At this time, the guide head 1 can be driven to disengage from the pin seat 2 by holding and moving the disassembly sleeve 3, and the unlocking rod 31 can also be released during the movement.

[0057] The above-mentioned ideal embodiments of the utility model are inspirations. Through the above-mentioned description, relevant staff can make various changes and modifications without deviating from the technical concept of the utility model. The technical scope of the utility model is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A guide head detachable anvil assembly, characterized in that: It comprises a guide head (1), an anvil seat (2) and a disassembly sleeve (3); A slideway (21) is provided at one end of the anvil seat (2), and a lock hole (22) is penetrated through the inner wall of the slideway (21); A connecting section (11) extends from the guide head (1), and a locking tongue (4) is provided on the connecting section (11) and can enter or leave the locking hole (22). When the locking tongue (4) on the connecting section (11) inserted into the slideway (21) is located in the locking hole (22), the guide head (1) is fixed on the anvil seat (2); a first clamping structure is provided at one end of the guide head (1) away from the connecting section (11); The disassembly sleeve (3) is provided with a second clamping structure and an unlocking rod (31), the second clamping structure is used to clamp with the first clamping structure, one end of the unlocking rod (31) is fixedly connected to the disassembly sleeve (3) or is integrally formed, and the other end is a suspended unlocking end (31a); when the first clamping structure of the disassembly sleeve (3) is clamped with the second clamping structure of the guide head (1), the unlocking end (31a) is aligned with the lock tongue (4); when the unlocking rod (31) is pressed so that the unlocking end (31a) presses the aligned lock tongue (4) into the slideway (21) and separates from the lock hole (22), the connecting section (11) can move along the slideway (21) and disengage from the anvil seat (2).

2. The guide head detachable anvil assembly according to claim 1, characterized in that: The first clamping structure comprises a clamping groove (12) arranged on the guide head (1), and the second clamping structure comprises a matching hole (32) arranged on the disassembly sleeve (3), a window (33) is provided on the hole wall of the matching hole (32), and an elastic clamping hook (34) is arranged in the window (33); when the guide head (1) is inserted into the matching hole (32) of the disassembly sleeve (3), the clamping hook (34) is clamped into the clamping groove (12).

3. The guide head detachable anvil assembly according to claim 2, characterized in that: One end of the hook (34) is integrally formed with the inner wall of the window (33), and the other end is provided with a hook portion (341) for embedding into the slot (12), and the hook portion (341) has an inclined surface (341a) for moving the hook (34) out of the matching hole (32) when the guide head (1) is inserted into the disassembly sleeve (3).

4. The guide head detachable anvil assembly according to claim 1, characterized in that: A locking rod (41) extends from one end of the locking tongue (4), and a rotating shaft (42) extends from one end of the locking rod (41) away from the locking tongue (4). The rotating shaft (42) is rotatably connected to the connecting section (11). A spring sheet (5) is also provided on the connecting section (11), and the spring sheet (5) is used to push the locking tongue (4) into the locking hole (22).

5. The guide head detachable anvil assembly according to claim 4, characterized in that: The connecting section (11) is provided with an axis groove (111), the rotating shaft portion (42) is inserted into the axis groove (111), one end of the spring sheet (5) has a root portion (51), and the other end abuts against the locking tongue (4), the root portion (51) is fixedly connected to the connecting section (11) and blocks the notch of the axis groove (111).

6. The guide head detachable anvil assembly according to claim 4, characterized in that: The connection section (11) is provided with a limiting groove (112) matching the locking rod (41), and the locking rod (41) is located in the limiting groove (112).

7. The guide head detachable anvil assembly according to claim 4, characterized in that: The spring sheet (5) is a metal sheet.

8. The guide head detachable anvil assembly according to claim 1, characterized in that: A flange (113) protrudes from the connecting section (11), a guide groove (23) is provided on the inner wall of the side of the slideway (21) where the locking hole (22) is located, and the flange (113) is slidably installed in the guide groove (23).

9. The guide head detachable anvil assembly according to claim 8, characterized in that: The guide groove (23) is connected to the locking hole (22); the width of the cross section of the slideway (21) in a direction perpendicular to the extension direction of the slideway (21) is greater than the width of the cross section of the guide groove (23) in a direction perpendicular to the extension direction of the slideway (21); the width of the cross section of the guide groove (23) in a direction perpendicular to the extension direction of the slideway (21) is less than the width of the cross section of the locking hole (22) in a direction perpendicular to the extension direction of the slideway (21); the unlocking end (31a) of the unlocking rod (31) is configured to be able to move in the guide groove (23) along the extension direction of the slideway (21).

10. A stapler, characterized in that: A guide head detachable dowel seat assembly comprising the following:

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