Stitching instrument capable of preventing nail from being stuck

Abstract

The utility model discloses an anti-staple-jamming stitching instrument which comprises an upper handle forming an inner cavity, a frame assembly fixed in the upper handle and a lower handle rotationally arranged on the frame assembly, and a staple pushing assembly and a forming block actuated by the lower handle are arranged in the frame assembly. A non-return assembly is further arranged between the frame assembly and the lower handle and comprises a locking block rotationally arranged on the lower handle, a locking part is arranged on the locking block, the frame assembly is provided with a locking face facing the locking block, and the locking part is matched with the locking face in the actuating stroke of the lower handle. Therefore, the current positions of the lower handle and the forming block in the actuating stroke are restrained, the operation error rate of medical staff is reduced, and the error-tolerant rate is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to surgical suturing equipment technical field, concretely relates to a kind of stapler of anti-stuck. BACKGROUND

[0002] Medical manual suture device has wide application in surgical field, including general surgery, orthopedics, obstetrics and gynecology etc. Its market demand continues to grow, on the one hand, benefit from the growing demand for surgical operation and the popularization of medical technology;On the other hand, also benefit from the improvement of the operation effect and the quality requirement of suture of patient.

[0003] A kind of medical suture device in prior art, by the actuating handle of hand, by handle and the push block thereon to eject the internal suture nail, and, still have a forming mechanism in the output path of suture nail to extrude suture nail into the shape of expectation, however, in actual use process, if medical staff in operation process, one operation does not actuate handle in place, suture nail has produced local deformation at this time, and handle reset, this will lead to the phenomenon of stuck nail in next use, cannot be used normally. UTILITY MODEL CONTENT

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a kind of stapler of anti-stuck.

[0005] The above technical purpose of the utility model is realized by the following technical scheme: a kind of stapler of anti-stuck, comprising: the upper handle of constituting inner cavity, the frame assembly fixed in the upper handle, and the lower handle rotationally arranged on the frame assembly, the frame assembly is equipped with push nail assembly, and the forming block actuated by lower handle;

[0006] The frame assembly and lower handle are also equipped with check assembly, the check assembly includes lock block rotationally arranged on lower handle, the lock block is equipped with locking portion, the frame assembly is equipped with locking surface facing lock block, the locking portion cooperates with locking surface in the actuating stroke of lower handle, to constrain the current position of lower handle and forming block in actuating stroke.

[0007] Further, the lock block is arranged to abut with frame assembly at the end of actuating stroke and deflect to unlock state, the locking portion is away from locking surface in unlock state and allows lower handle to reset.

[0008] Further, the lower handle is also equipped with retaining block, the lock block is in abutment with retaining block in unlock state and is kept in current posture, and the lock block is in abutment with frame assembly in the reset stroke of lower handle, and is away from cooperating with retaining block.

[0009] Further, the end of the frame assembly is equipped with actuating portion, the actuating portion is equipped with first guide surface in actuating stroke.

[0010] The lock block is provided with an abutting portion spaced from the locking portion, and the abutting portion is provided with a second guide surface, the first guide surface and the second guide surface abut in the actuating stroke and force the lock block to swing to the unlocked state.

[0011] Further, the end of the frame assembly is provided with an actuating portion, and the actuating portion is provided with a first stop surface in the return stroke;

[0012] The lock block is provided with an abutting portion spaced from the locking portion, and the abutting portion is provided with a second stop surface, the first stop surface and the second stop surface abut and force the lock block to swing at the end of the return stroke so that the locking portion cooperates with the locking surface.

[0013] Further, the end of the lock block is provided with a transposition block, the retaining block is provided with a first cooperating surface and a second cooperating surface, the transposition block abuts the first cooperating surface in the actuating stroke, and at the end of the actuating stroke, the transposition block moves against the first cooperating surface and abuts the second cooperating surface.

[0014] Further, the retaining block is deformable to adapt to the lock block in the unlocked state.

[0015] Further, the second cooperating surface is adjacent to the first cooperating surface, or the second cooperating surface is provided spaced from the first cooperating surface.

[0016] Further, the retaining block has a fixed end connected with the lower handle and a free end movable relative to the lower handle, and a travel channel for the lock block to slide in is spaced between the retaining block and the lower handle, and the first cooperating surface and the second cooperating surface are located in the travel channel.

[0017] Further, the locking surface and the locking portion are engaged through teeth.

[0018] Compared with the prior art, the utility model has the following advantages and beneficial effects: in the utility model, the rotatable lock block is arranged on the movable lower handle, the locking surface is arranged on the fixed frame assembly, in the actuating stroke of the lower handle, the locking portion on the lock block cooperates with the locking surface, so that the suture nail and the forming block remain in the current position in the case that the current actuating operation is not completely completed, the suture nail is prevented from being stuck due to incomplete deformation, the current suture nail is ensured to be fired after being completely pressed in place, the operation failure rate of medical staff is reduced, and the fault tolerance is high. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a schematic view of the overall structure of the utility model;

[0020] Figure 2 It is a sectional view of the initial state of the utility model;

[0021] Figure 3 This is a cross-sectional view of the initial state of this utility model from another angle;

[0022] Figure 4 This is a schematic diagram showing the state in which the transposition block of this utility model abuts against the first mating surface;

[0023] Figure 5 This is a schematic diagram showing the state in which the transposition block abuts against the second mating surface in one embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram showing the state in which the transposition block abuts against the second mating surface in another embodiment of the present invention;

[0025] Figure 7 This is a schematic diagram showing the state when the second stop part abuts against the first stop part during the return stroke of this utility model;

[0026] Figure 8 This is a schematic diagram showing the state of the shifting block and the holding block during the actuation stroke of this utility model;

[0027] Figure 9 This is a schematic diagram showing the state of the locking surface and locking part during the actuation stroke of this utility model;

[0028] In the diagram: 1. Upper handle; 2. Frame assembly; 2.1. Locking surface; 2.2. Actuating part; 2.21. First guide surface; 2.22. First stop surface; 3. Lower handle; 3.1. Holding block; 3.11. First mating surface; 3.12. Second mating surface; 3.13. Fixed end; 3.14. Free end; 3.15. Sliding surface; 4. Push pin assembly; 5. Forming block; 6. Locking block; 6.1. Locking part; 6.11. Second guide surface; 6.2. Abutting part; 6.21. Second stop surface; 6.3. Shifting block; 7. Traveling channel; Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] It should be understood that although the terms upper, middle, lower, top, one end, etc., appear in this document to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish the elements from each other for ease of understanding, and are not used to define any directional or sequential restrictions.

[0031] likeFigures 1-9 As shown, a suture device for preventing staple jamming includes: an upper handle 1 forming an inner cavity, a frame assembly 2 fixed inside the upper handle 1, and a lower handle 3 rotatably disposed on the frame assembly 2. The frame assembly 2 is provided with a staple pusher assembly 4 and a forming block 5 actuated by the lower handle 3. The lower handle 3 is provided with a rotating shaft, which can be engaged with the frame assembly 2 or the upper handle 1. The frame assembly 2 is provided with a staple outlet. The staple pusher assembly 4 abuts against the staple row. By manually pressing the lower handle 3, the forming block 5 moves toward the staple outlet and presses against the staple, so that the staple deforms and fires in the expected posture.

[0032] like Figure 2 and Figure 3 As shown, a check valve assembly is also provided between the frame assembly 2 and the lower handle 3. This check valve assembly is used to maintain the current actuation position of the lower handle 3, the forming block 5 and the push pin assembly 4 in real time during the actuation stroke, thereby preventing the stitching pin from getting stuck due to incomplete actuation operation.

[0033] like Figure 9 As shown, in this embodiment, the anti-return assembly includes a locking block 6 rotatably mounted on the lower handle 3. The locking block 6 is provided with a locking part 6.1. The frame assembly 2 is provided with a locking surface 2.1 facing the locking block 6. The locking block 6 moves synchronously with the lower handle 3 and has an actuation stroke and a return stroke. The locking part 6.1 cooperates with the locking surface 2.1 during the actuation stroke of the lower handle 3 to constrain the current position of the lower handle 3 and the forming block 5 during the actuation stroke. At this time, the locking block 6 is in a locked state.

[0034] Lock block 6 is set to abut against frame assembly 2 at the end of the actuation stroke and swing to the unlocked state. At this time, locking part 6.1 moves away from locking surface 2.1 in the unlocked state, allowing lower handle 3 to return to the original position. After that, lock block 6 remains in the unlocked state during the return stroke of lower handle 3 until lower handle 3 moves to the end of the return stroke, at which point lock block 6 abuts against frame assembly 2 again and swings to the locked state.

[0035] In this embodiment, the frame assembly 2 is provided with an actuating part 2.2, and the locking block 6 is provided with an abutting part 6.2 spaced apart from the locking part 6.1. The actuating part 2.2 is used to abut against the locking part 6.1 of the locking block 6 at the end of the actuation stroke to deflect the locking block 6 to the unlocked state, and abut against the abutting part 6.2 of the locking block 6 at the end of the return stroke to deflect the locking block 6 back to the locked state.

[0036] Furthermore, the lower handle 3 is also provided with a retaining block 3.1, and the end of the locking block 6 is provided with a shifting block 6.3. In the locked state of the actuation stroke, the shifting block 6.3 is always abutting against the retaining block 3.1 in the first position. At the end of the actuation stroke, due to the abutting part 6.2 and the actuating part 2.2, the locking block 6 is forced to rotate to the unlocked state. At this time, the shifting block 6.3 is driven to switch from the first position to the second position. The first position and the second position are separated. In the return stroke, the shifting block 6.3 is kept in the unlocked state by abutting against the retaining block 3.1 in the second position. At the end of the return stroke, due to the interaction between the actuating part 2.2 and the abutting part 6.2 again, the shifting block 6.3 is switched from the second position back to the first position.

[0037] Reference Figures 5 to 8 As a further embodiment of the abutting part 6.2 and the actuating part 2.2, the actuating part 2.2 is provided with a first guide surface 2.21 in the actuation stroke. The first guide surface 2.21 is an inclined surface that is inclined in the direction of the actuation stroke, or it can be an arc surface. It protrudes from the locking surface 2.1 in the actuation stroke so that the locking part 6.1 can abut against it, so that the locking block 6 rotates relative to it, and under the guidance of the first guide surface 2.21, the locking part 6.1 moves away from the locking surface 2.1.

[0038] Preferably, the locking part 6.1 is provided with a second guide surface 6.11. The second guide surface 6.11 is an inclined surface connecting the locking part 6.1 and the main body of the locking block 6, or it can be an arc surface. The first guide surface 2.21 and the second guide surface 6.11 abut against each other during the actuation stroke and force the locking block 6 to swing to the unlocked state. At this time, the shifting block 6.3 on the locking block 6 is forced to move from the first position to the second position.

[0039] Specifically, the actuating part 2.2 is provided with a first stop surface 2.22 during the return stroke; the abutting part 6.2 is provided with a second stop surface 6.21 during the return stroke. During the return stroke of the lower handle 3, the first stop surface 2.22 abuts against the second stop surface 6.21 and forces the locking block 6 to swing at the end of the return stroke so that the locking part 6.1 cooperates with the locking surface 2.1. At this time, the shifting block 6.3 on the locking block 6 is forced to move from the second position to the first position.

[0040] Preferably, in order to ensure that the abutting part 6.2 on the locking block 6 and the actuating part 2.2 on the frame assembly 2 can reliably abut against each other during the return stroke to cause the locking block 6 to return to the locked state, the first stop surface 2.22 and the second stop surface 6.21 are set as planes. During the return stroke, the second stop surface 6.21 swings back as it returns, and gradually switches from an angled position to a plane contact position with the first stop surface 2.22.

[0041] As a further embodiment of the locking block 6 and the retaining block 3.1, the retaining block 3.1 is provided with a first mating surface 3.11 and a second mating surface 3.12. The first mating surface 3.11 and the second mating surface 3.12 are preferably provided at the ends of the retaining block 3.1. The shifting block 6.3 is triangular in shape and has two adjacent inclined surfaces and a pointed protrusion between the two inclined surfaces. The shifting block 6.3 abuts against the first mating surface 3.11 in the initial state and during the actuation stroke. At this time, the locking surface 2.1 remains locked with the locking part. At the end of the actuation stroke, it moves against the first mating surface 3.11 and abuts against the second mating surface 3.12. At this time, the locking block 6 swings and causes the locking surface 2.1 to disengage from the locking part.

[0042] Specifically, the retaining block 3.1 is set to be deformable to fit the locking block 6 in the unlocked state. In this way, when the shifting block 6.3 swings between the first mating surface 3.11 and the second mating surface 3.12, the retaining block 3.1 is pressed and deformed to adapt to the movement of the shifting block 6.3.

[0043] like Figure 5 As shown, in one embodiment where the shifting block 6.3 and the retaining block 3.1 are in the unlocked state, the second mating surface 3.12 is adjacent to the first mating surface 3.11, that is, the first mating surface 3.11 and the second mating surface 3.12 are connected and form a stepped end. The shifting block 6.3 needs to overcome a certain resistance to move from the first mating surface 3.11 to the second mating surface 3.12. In this embodiment, the shifting block 6.3 follows the deflection of the locking block 6 and slides directly from the first mating surface 3.11 to the second mating surface 3.12. During the process, the retaining block 3.1 is pressed up by the shifting block 6.3 and deforms upward. Preferably, the pointed part of the shifting block 6.3 contacts the second mating surface 3.12. At this time, due to the restoring force of the retaining block 3.1 itself, the shifting block 6.3 and the retaining block 3.1 are in a relatively unstable contact state. When the handle 3 moves to the end of the return stroke, under the contact action of the first stop surface 2.22 and the second stop surface 6.21, the locking block 6 can easily swing back from the second mating surface 3.12 to the second mating surface 3.12.

[0044] like Figure 6 As shown, in another embodiment of the interlocking block 6.3 and the retaining block 3.1 in the unlocked state, the second mating surface 3.12 is spaced apart from the first mating surface 3.11. That is, the first mating surface 3.11 and the second mating surface 3.12 are two opposing surfaces on the end of the retaining block 3.1. A sliding surface 3.15 is provided between the first mating surface 3.11 and the second mating surface 3.12. The first mating surface 3.11, the second mating surface 3.12, and the sliding surface 3.15 are interconnected. In this process,

[0045] The shifting block 6.3 follows the swing of the locking block 6. The shifting block 6.3 needs to overcome the first mating surface 3.11 and slide on the sliding surface 3.15. During this process, the holding block 3.1 is pressed up by the shifting block 6.3 and deforms upward until the shifting block 6.3 slides to the second mating surface 3.12. At this time, the holding block 3.1 returns to its original position and positions the shifting block 6.3 on the second mating surface 3.12 to keep the locking block 6 in the unlocked state and prevent the locking block 6 from returning to the locked state. In this embodiment, the stability of the unlocked state during the return stroke can be ensured.

[0046] As a further explanation of the retaining block 3.1, the retaining block 3.1 has a fixed end 3.13 connected to the lower handle 3 and a free end 3.14 movable relative to the lower handle 3. Specifically, the retaining block 3.1 is an arm extending from the end away from the locking block 6 toward the locking block 6, so that the retaining block 3.1 can be tilted up under the abutment of the shifting block 6.3, and a travel channel 7 for the locking block 6 to slide in is spaced between the retaining block 3.1 and the lower handle 3. The first mating surface 3.11 and the second mating surface 3.12 are located in the travel channel 7. The travel channel 7 is specifically L-shaped. The shifting block 6.3 is constrained to slide in the travel channel 7, and the shifting block 6.3 extends into the travel channel 7 so that the lower handle 3 can drive the locking block 6 to move synchronously when rotated. At the same time, the slider is provided with a shaft portion passing through the lower handle 3.

[0047] The first mating surface 3.11 and the second mating surface 3.12, or the first mating surface 3.11, the second mating surface 3.12 and the sliding surface 3.15, are all provided on the free end 3.14, and the travel channel 7 is defined between the free end 3.14 and the fixed end 3.13.

[0048] from Figure 8 As can be seen from the above embodiment, the portion of the shift block 6.3 extending into the travel channel 7 is defined as the extension. The travel channel 7 is provided with a first limiting plane with a planar arrangement, and the bottom of the extension is provided with a second limiting plane. In the unlocked state, the first limiting plane abuts against the second limiting plane, and at this time, the holding block 3.1 applies a downward force to the shift block 6.3 in a raised posture, thereby improving the position reliability of the lock block 6 in the unlocked state.

[0049] In the above embodiment, the locking surface 2.1 and the locking part 6.1 are engaged by teeth, and the teeth have inclined surfaces facing the actuation stroke direction, so that the locking part 6.1 can engage and disengage with the teeth on the locking surface 2.1 one by one during the actuation stroke, and prevent return to the locked state.

[0050] In the above embodiment, during the actuation stroke, the locking part 6.1 of the locking block 6 engages with the locking surface 2.1 of the frame assembly 2 to prevent the lower handle 3 from returning to its original position. At the end of the actuation stroke, the first guide surface 2.21 on the actuating part 2.2 abuts against the second guide surface 6.11 on the locking block 6, forcing the locking block 6 to deflect. At this time, the locking block 6 rotates to the unlocked state, that is, the locking surface 2.1 and the locking part 6.1 move away from each other, and the shifting block 6.3 on the locking block 6 presses against the retaining block 3.1. The shifting block 6.3 moves from the first mating surface 3.11 to the second mating surface 3.12, and the retaining block... 3.1 The lever is tilted and the force applied to the shift block 6.3 keeps it in the unlocked state. Then the lower handle 3 is reset. During the return stroke, the second stop surface 6.21 on the locking block 6 abuts against the first stop surface 2.22 on the actuating block, forcing the locking block 6 to rotate back to the locked state. At this time, the shift block 6.3 presses against the holding block 3.1 in the opposite direction and abuts against the first mating surface 3.11 again. At this time, the lower handle 3 returns to the position, thus achieving a stop during the actuation stroke of the lower handle 3. After the actuation operation is completed, the lower handle 3 is kept in a stable unlocked state and returned to the position. The operation is smooth and the structure is simple.

[0051] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A staple-proof sewing device, characterized in that, include: The upper handle (1) that forms the inner cavity, the frame assembly (2) fixed inside the upper handle (1), and the lower handle (3) rotatably disposed on the frame assembly (2), wherein the frame assembly (2) is provided with a push pin assembly (4) and a molding block (5) actuated by the lower handle (3); A check valve assembly is also provided between the frame assembly (2) and the lower handle (3). The check valve assembly includes a locking block (6) rotatably disposed on the lower handle (3). The locking block (6) is provided with a locking part (6.1). The frame assembly (2) is provided with a locking surface (2.1) facing the locking block (6). The locking part (6.1) cooperates with the locking surface (2.1) during the actuation stroke of the lower handle (3) to constrain the current position of the lower handle (3) and the forming block (5) during the actuation stroke.

2. The anti-stitch sewing device according to claim 1, characterized in that: The locking block (6) is configured to abut against the frame assembly (2) at the end of the actuation stroke and deflect to the unlocked state, and the locking part (6.1) moves away from the locking surface (2.1) in the unlocked state to allow the lower handle (3) to return to its original position.

3. The anti-stitch sewing device according to claim 1, characterized in that: The lower handle (3) is also provided with a retaining block (3.1). The locking block (6) abuts against the retaining block (3.1) and remains in the current position when the lower handle (3) is in the unlocked state. The locking block (6) abuts against the frame assembly (2) during the return stroke of the lower handle (3) and disengages from the retaining block (3.1).

4. The anti-stitch sewing device according to claim 1, characterized in that: The end of the frame assembly (2) is provided with an actuating part (2.2), and the actuating part (2.2) is provided with a first guide surface (2.21) during the actuation stroke; The locking block (6) is provided with an abutting portion (6.2) spaced apart from the locking portion (6.1). The abutting portion (6.2) is provided with a second guide surface (6.11). The first guide surface (2.21) and the second guide surface (6.11) abut against each other during the actuation stroke and force the locking block (6) to swing to the unlocked state.

5. A stitching device for preventing staple jamming according to claim 1, characterized in that: The end of the frame assembly (2) is provided with an actuating part (2.2), and the actuating part (2.2) is provided with a first stop surface (2.22) during the return stroke; The locking block (6) is provided with an abutment portion (6.2) spaced apart from the locking portion (6.1). The abutment portion (6.2) is provided with a second stop surface (6.21). The first stop surface (2.22) abuts against the second stop surface (6.21) and forces the locking block (6) to swing at the end of the return stroke so that the locking portion (6.1) cooperates with the locking surface (2.1).

6. A stitching device for preventing staple jamming according to claim 3, characterized in that: The locking block (6) has a shifting block (6.3) at its end. The retaining block (3.1) has a first mating surface (3.11) and a second mating surface (3.12). The shifting block (6.3) abuts against the first mating surface (3.11) during the actuation stroke, and moves against the first mating surface (3.11) and abuts against the second mating surface (3.12) at the end of the actuation stroke.

7. A stitching device for preventing staple jamming according to claim 3, characterized in that: The retaining block (3.1) is deformably configured to adapt to the lock block (6) in the unlocked state.

8. A stitching device for preventing staple jamming according to claim 6, characterized in that: The second mating surface (3.12) is adjacent to the first mating surface (3.11), or the second mating surface (3.12) is spaced apart from the first mating surface (3.11).

9. A stitching device for preventing staple jamming according to claim 6, characterized in that: The retaining block (3.1) has a fixed end (3.13) connected to the lower handle (3) and a free end (3.14) movable relative to the lower handle (3), and a travel channel (7) is spaced between the retaining block (3.1) and the lower handle (3) for the locking block (6) to slide therein, and the first mating surface (3.11) and the second mating surface (3.12) are located in the travel channel (7).

10. A staple-resistant sewing device according to claim 1, characterized in that: The locking surface (2.1) and the locking part (6.1) are engaged by teeth.

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