A staple cartridge assembly

Abstract

The utility model belongs to the technical field of medical apparatus and instruments, especially relates to a nail bin subassembly. The utility model provides a nail bin subassembly in view of the present situation that the nail bin is not installed operation nail or the nail bin that has been used is used by accident to cause the present situation of the operation accident that the tissue under the unwelded seam is cut, including the nail -holding casing, pushes the nail piece and the sliding chassis, the nail -holding casing contains the nail -holding casing, pushes the nail particle, the push nail piece is connected with the sliding chassis and the push nail piece is extruded and pushes the nail particle in the sliding chassis sliding, the push nail piece contains the elastic pressing piece, the elastic pressing piece is connected locking device, the elastic pressing piece keeps the state of pressing down when pushing the nail piece movement, when the elastic pressing piece is not pressed down, locking device and the sliding chassis interfere. The utility model discloses the locking device that will release when not carrying out normal push nail is set up on the push nail piece and cooperates the blocking device set up on the sliding chassis, can stop pushing the nail and cutting in the emergency braking under the condition that cannot normally push the nail.

Description

Technical Field

[0001] This utility model belongs to the field of medical equipment technology, and in particular relates to a staple cartridge assembly. Background Technology

[0002] Linear anastomosis devices are suitable for transverse sections and resections of internal organs during gastrointestinal and thoracic surgeries. They employ a pre-staple-then-cut approach: a screw pusher first presses the staples into the tissue on both sides, followed by a cutting blade that separates the sections in the middle. This achieves the effect of pre-stapled sections without the need for sutures, as the cut sides are already pre-stitched. However, if the staples are not pre-stitched, such as if the staple cartridge is not loaded with surgical staples or if a previously used staple cartridge is accidentally used, the procedure may result in cutting without suturing, potentially leading to surgical complications.

[0003] For example, a Chinese invention patent discloses a staple cartridge assembly for a linear stapler (application number: 202010186652.4). This invention distributes three rows of upper staple cavities and three rows of lower staple cavities alternately in the upper and lower halves of the staple cartridge. This ensures that the maximum force exerted on the staple pushers during staple formation is staggered. The first staple pusher is inserted into both the first and second rows of staple cavities, and the second staple pusher is inserted into the third row. The slope of the first inclined surface used to push the first staple pusher is smaller than that of the second inclined surface used to push the second staple pusher. This ensures that, while generating the same upward thrust, the forward thrust of the staple pusher is smaller. Furthermore, the staggered highest points of the first and second inclined surfaces on the staple pusher allow the first and second staple pushers to reach their highest points at different times, preventing all three rows of staples from reaching their highest points simultaneously. This further reduces the thrust required by the staple pusher, making the entire suturing process smoother, alleviating surgical fatigue, and optimizing the suturing effect.

[0004] Although the invention achieves stability in the stitching process by setting up a new pusher block structure and pusher pellet layout, it still does not take measures to avoid cutting the seam before stitching due to the absence of stitches in the staple cartridge. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing a staple cartridge assembly that can automatically stop advancing when there are no staples in front, thus preventing the cutting blade from continuing to cut when there is no tissue on both sides of the staple.

[0006] This utility model includes a nail-receiving housing, a nail-pushing block, and a sliding base. The nail-receiving housing contains a nail-pushing pellet. The nail-pushing block is slidably connected to the sliding base, and the nail-pushing block slides and compresses the nail-pushing pellet on the sliding base. The nail-pushing block contains an elastic pressure block, which is connected to a locking device. The elastic pressure block remains in a pressed state when the nail-pushing block pushes the nail-pushing pellet. When the elastic pressure block is not pressed down, the locking device interferes with the sliding base.

[0007] Preferably, the sliding base includes a slide groove with a blocking device at the bottom, and the blocking device is located within the projection of the pusher pin on the sliding base along the direction of movement of the pusher pin block; when the elastic pressure block is not pressed down, the locking device interferes with the blocking device.

[0008] Preferably, it also includes a combined pressing structure, wherein the combined pressing structure is fixedly connected to the elastic pressing block; the combined pressing structure and the locking device form a lever structure.

[0009] Preferably, the blocking device consists of individual blocking spaces arranged on the slide groove, and the locking device is a rod with a protrusion at one end that can be rotated. When the elastic block is not pressed down, the protrusion of the locking device is engaged with the blocking groove.

[0010] Preferably, the blocking device is a triangular groove with a slide groove arrangement, and the locking device is a rod with a right-angled triangular structure at one rotatable end.

[0011] Preferably, there is an elastic reset device between the bottom of the elastic pressure block and the push pin block.

[0012] Preferably, the combined pressing structure is at a gravitational disadvantage relative to the locking device when not pressed down by the elastic block.

[0013] Preferably, the rotation angle of the lever structure is between -45 degrees and 45 degrees relative to the horizontal plane.

[0014] Preferably, the pusher block includes a movable cavity, in which the elastic pressure block and the main body of the combined pressing structure move.

[0015] Preferably, the nail housing includes symmetrical inner and outer sliding grooves, and the nail pusher includes symmetrical inner and outer pusher wings; the inner pusher wings slide in the inner sliding groove, the outer pusher wings slide in the outer sliding groove, and the elastic pressure blocks are distributed on the inner pusher wings on both sides.

[0016] Compared with existing technologies, the advantages of this utility model are: This invention, by setting a locking device on the pusher block that can change its relative position according to pressure, and combining it with a blocking device on the sliding base, can brake and stop pusher and cutting in case the pusher cannot be pushed normally, thus avoiding surgical accidents. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall design of this utility model; Figure 2 This is an exploded view of the present invention; Figure 3 This is a schematic diagram of the overall structure of the pusher block; Figure 4 This is a schematic diagram of the pusher block from another perspective; Figure 5 for Figure 4 AA cross-sectional diagram Figure 6 This is a schematic diagram of the lever structure described in this utility model; Figure 7 This is a schematic diagram of the sliding base frame of this utility model; Figure 8 This is a schematic diagram of the sliding base of the blocking device according to another embodiment of the present invention; Figure 9 for Figure 1 Another perspective illustration; Figure 10 A schematic diagram of the cutting blade inside the stapler that pushes the pusher block forward; In the diagram: nail housing 1, inner slide groove 11, outer slide groove 12, nail pusher block 2, movable cavity 21, inner pusher wing 22, outer pusher wing 23, sliding base frame 3, slide groove 31, blocking device 32, blocking space 321, triangular groove 322, nail pusher 4, elastic pressure block 5, locking device 6, combined pressing structure 7, lever structure 8, elastic reset device 9, cutting blade 10. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0019] This utility model is a staple cartridge assembly, such as Figure 1-7 The device includes a nail-receiving housing 1, a nail-pushing block 2, and a sliding base 3. The nail-receiving housing 1 contains a nail-pushing pellet 4. The nail-pushing block 2 is slidably connected to the sliding base 3, and the nail-pushing block 2 slides and presses the nail-pushing pellet 4 on the sliding base 3. The nail-pushing block 2 contains an elastic pressure block 5, which is connected to a locking device 6. The elastic pressure block 5 remains in a pressed state when the nail-pushing block 2 pushes the nail-pushing pellet 4. When the elastic pressure block 5 is not pressed down, the locking device 6 interferes with the sliding base 3.

[0020] In use, as described in the background art references above, under normal circumstances, the pusher 4 on the staple housing 1 already has pre-embedded suture staples. After the staple cartridge is installed onto the stapler forceps head, and the linear stapler is inserted into the body through the trocar channel, the stapler forceps head presses against the tissue to be operated on. The suture staple will penetrate the tissue and generate resistance. Then, manually or electrically, the cutting blade 10 inside the stapler is pushed towards the forceps head, pushing the pusher block 2. The inclined surface on the pusher block 2 gradually pushes the pusher 4, pushing the suture staple deeper into the tissue. The suture staple tip is then pressed against the anvil of the forceps head to complete the staple insertion. During the insertion of the suture staple, the pusher 4 provides a reaction force to the pusher block 2. If this reaction force is continuously fed back, the elastic block 5 will be pressed down, and the locking device 6 will not extend or descend due to the elastic block 5, preventing interference with the sliding base 3. If the suture pin is not installed or the push pin 4 has been pushed out, the elastic block 5 will not be squeezed, and the locking device 6 will return to its original state and interfere with the sliding base 3 when no force is applied by the elastic block 5.

[0021] Preferably, the sliding base frame 3 includes a slide groove 31 with a blocking device 32 at the bottom. The blocking device 32 is located within the projection of the push nail 4 on the sliding base frame 3 along the movement direction of the push nail block 2, that is, the arrangement range of the blocking device 32 is within the stroke range of the push nail block 2 pushing the push nail 4. When the elastic pressure block 5 is not pressed down, the locking device 6 interferes with the blocking device 32.

[0022] Preferred, such as Figure 5-6 As shown, it also includes a combined pressing structure 7, which is fixedly connected to the elastic pressure block 5; the combined pressing structure 7 and the locking device 6 form a lever structure 8. When the elastic pressure block 5 is pressed down, it will drive the combined pressing structure 7 to press down, causing the locking device 6 to tilt up, thus preventing interference with the blocking device 32. Of course, the combined pressing structure 7 can be connected to different elastic pressure blocks simultaneously, or it can be connected individually, but it is generally connected together, because in practice, it is mainly to prevent the entire assembly without sutures from being accidentally triggered when installed on the stapler.

[0023] Preferred, such as Figure 7 As shown, the blocking device 32 consists of individual blocking spaces 321 arranged on the slide groove 31, and the locking device 6 is a rod with a protrusion at one end that can be rotated. When the elastic pressure block 5 is not pressed down, the protrusion of the locking device 6 is engaged with the blocking groove 321.

[0024] Of course, another solution can be adopted to achieve better continuous gapless locking and optimal effect. The blocking device 32 is a triangular groove 322 arranged on the slide groove 31, and the locking device 6 is a rod with a right-angled triangular structure at one end that can be rotated.

[0025] Preferably, there is an elastic reset device 9 between the bottom of the elastic pressure block 5 and the push pin block 2 to provide a restoring force when the elastic pressure block 5 is not pressed down, thereby driving the combined pressing structure 7 to rise and finally causing the locking device 6 to be lowered.

[0026] Preferably, the combined pressing structure 7 is at a gravitational disadvantage relative to the locking device 6 when it is not pressed down by the elastic pressing block 5. That is, when it is not squeezed by the elastic pressing block 5, the locking device 6 will gain a leverage advantage and hang down to lock. Therefore, the above technical features limit the blocking device 43 during the stroke of the pusher block 2 pushing the pusher piece 4.

[0027] Preferably, the rotation angle of the lever structure 8 relative to the horizontal plane is between -45 degrees and 45 degrees. It should be noted that this technical feature means that any limitation within this range is acceptable; it can also be 0 degrees to 30 degrees or -30 degrees to 30 degrees. Due to limitations such as the height of the slide groove 31 and the height of the movable cavity 21, and in order to achieve rapid rotation and locking of the locking device 6, the lever rotation amplitude cannot be too large. The specific rotation amplitude is adaptively adjusted according to different specifications and the length between the two sides of the lever.

[0028] Preferably, the pusher block 2 includes a movable cavity 21, within which the main body of the elastic pressure block 5 and the combined pressing structure 7 moves.

[0029] Preferably, the nail housing 1 includes symmetrical inner sliding grooves 11 and outer sliding grooves 12, and the nail pusher block 2 includes symmetrical inner pusher wings 22 and outer pusher wings 23; the inner pusher wings 22 slide in the inner sliding groove 11, the outer pusher wings 23 slide in the outer sliding groove 12, and the elastic pressure blocks 5 are at least distributed on the inner pusher wings 22 on both sides (because the cutting blade cuts from the middle, the suture nails on both inner sides normally have at least a certain suturing effect).

[0030] The working principle of this embodiment is as follows: Figure 1-9 As shown, under normal circumstances, the pusher pins 4 located inside the pin housing 1 are pre-embedded with suture pins. After the staple cartridge is installed onto the stapler forceps, and the linear stapler is inserted into the body through the trocar channel, the stapler forceps are pressed against the tissue location to be operated on. The suture pins will penetrate the tissue and generate resistance. Then, the pusher pins inside the stapler are pushed manually or electrically. Figure 10The cutting blade 10 moves towards the clamp head, pushing the pusher block 2. The inclined surfaces on the inner pusher wing 22 and outer pusher wing 23 of the pusher block 2 slide in the inner slide groove 11 and outer slide groove 12 respectively, gradually pushing the pusher bit 4 to press the suture staple deeper into the tissue. The suture staple tip is then pressed against the clamp head by the suture anchor to complete the stitching. During the pressing of the suture staple, the pusher bit 4 provides a reaction force to the pusher block 2. If this reaction force continues, the elastic pressure block 5 will be continuously pressed down, causing the combined pressing structure 7 to press down and lift the locking device 6, preventing interference with the lower blocking device 32, such as the blocking space 321 or the triangular groove 322. When the pusher block 2 has no suture staple to push, the elastic pressure block 5 is not under pressure. The elastic reset device 9 pushes the elastic pressure block 5 upwards, causing the locking device 6 to rotate downwards. The structure at the end of the locking device 6 will interfere with the blocking device 32, forcing the pusher block 2 to stop the cutting blade 10 from advancing. Of course, if the stapler drive uses a motor, there can also be a supporting program and structure that automatically stops pushing when encountering resistance, which will not be discussed here.

[0031] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0032] Although this document frequently uses terms such as nail housing 1, inner groove 11, outer groove 12, nail pusher block 2, movable cavity 21, inner pusher wing 22, outer pusher wing 23, sliding base frame 3, slide groove 31, blocking device 32, blocking space 321, triangular groove 322, nail pusher 4, elastic pressure block 5, locking device 6, combined pressing structure 7, lever structure 8, and elastic reset device 9, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A staple cartridge assembly, comprising a staple housing (1), a staple pusher block (2), and a sliding base (3), wherein the staple housing (1) contains staple pushers (4), the staple pusher block (2) is slidably connected to the sliding base (3), and the staple pusher block (2) slides and presses the staple pusher (4) on the sliding base (3); characterized in that: The pusher block (2) contains an elastic pressure block (5), which is connected to a locking device (6). The elastic pressure block (5) remains in a pressed state when the pusher block (2) pushes the pusher nail (4) to move. When the elastic pressure block (5) is not pressed down, the locking device (6) interferes with the sliding base frame (3).

2. The staple cartridge assembly as described in claim 1, characterized in that: The sliding base (3) includes a slide groove (31) with a blocking device (32) at the bottom. The blocking device (32) is located in the projection of the push nail (4) on the sliding base (3) along the movement direction of the push nail block (2). When the elastic pressure block (5) is not pressed down, the locking device (6) interferes with the blocking device (32).

3. The staple cartridge assembly as described in claim 2, characterized in that: It also includes a combined pressing structure (7), which is fixedly connected to an elastic pressure block (5); the combined pressing structure (7) and the locking device (6) form a lever structure (8).

4. The staple cartridge assembly as described in claim 2, characterized in that: The blocking device (32) consists of individual blocking spaces (321) arranged on the slide groove (31). The locking device (6) is a rod with a protrusion at one end that can be rotated. When the elastic block (5) is not pressed down, the protrusion of the locking device (6) is engaged in the blocking groove (321).

5. The staple cartridge assembly as described in claim 2, characterized in that: The blocking device (32) is a triangular groove (322) arranged in a slide groove (31), and the locking device (6) is a rod with a right-angled triangular structure at one end that can be rotated.

6. The staple cartridge assembly as described in claim 3, characterized in that: There is an elastic reset device (9) between the bottom of the elastic pressure block (5) and the push pin block (2).

7. The staple cartridge assembly as described in claim 3, characterized in that: The combined pressing structure (7) is at a gravitational disadvantage relative to the locking device (6) when it is not pressed down by the elastic block (5).

8. The staple cartridge assembly as described in claim 3, characterized in that: The rotation angle range of the lever structure (8) is from -45 degrees to 45 degrees relative to the horizontal plane.

9. The staple cartridge assembly as described in claim 3, characterized in that: The pusher block (2) includes a movable cavity (21), in which the main body of the elastic pressure block (5) and the combined pressing structure (7) moves.

10. The staple cartridge assembly as described in claim 1, characterized in that: The nail housing (1) includes symmetrical inner grooves (11) and outer grooves (12), and the nail pusher (2) includes symmetrical inner pusher wings (22) and outer pusher wings (23); the inner pusher wings (22) slide in the inner groove (11), the outer pusher wings (23) slide in the outer groove (12), and the elastic pressure blocks (5) are distributed on the inner pusher wings (22) on both sides.

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