Stapler

Abstract

The present invention provides a stapler, comprising a stapler assembly, a drive assembly and a connecting block. The anastomosis assembly comprises a nail magazine and an anvil rod connected to each other, the nail magazine has an assembly end, the anvil rod has a movable end, the movable end and the assembly end are configured to be able to approach or move away from each other to control the opening and closing of the anastomosis assembly, and the assembly end is provided with a stop block; the driving assembly comprises a driving module and a driving arm connecting the anastomosis assembly and the driving module, and the driving module is configured to drive the driving arm to move linearly; the connecting block comprises a first end and a second end arranged opposite to each other, the first end is movably connected to the movable end, the second end is rotationally connected to the driving arm, and they are jointly movably connected to the assembly end, the tip of the second end abuts against the stop block and can move relative to the stop block under the drive of the driving arm; wherein the stop block comprises a supporting arm arranged in contact with the nail magazine and a stop arm arranged perpendicular to the nail magazine, the second end is configured to slide along the supporting arm, and when the second end slides to contact with the stop arm, the vertical distance between the first end and the nail magazine is a first distance, and when the second end slides to move away from the stop arm, the vertical distance between the first end and the nail magazine is a second distance, and the first distance is greater than the second distance. Compared with the prior art, the stapler of the present invention can increase the lifting height of the anvil rod without changing the length of the stapler.

Description

Technical Field

[0001] The invention relates to anastomosis apparatus and belongs to the field of medical equipment. Background Art

[0002] The existing stapler is limited by the structural design of the anvil rod and the staple cartridge, and the lifting angle of the anvil rod is relatively fixed, which limits the application scope of the stapler.

[0003] In order to solve this problem, the length of the stapler is usually increased, so that the distance between the anvil rod and the stapler can be expanded without changing the lifting angle. However, this will undoubtedly increase the cost, and the longer the stapler, the lower the stability during use.

[0004] In view of this, it is indeed necessary to improve the existing stapler to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a stapler which can increase the lifting angle of the anvil rod without changing the length of the stapler itself.

[0006] To achieve the above object, the present invention provides a stapler, comprising:

[0007] The anastomosis assembly comprises a staple cartridge and an anvil rod connected to each other, the staple cartridge having an assembly end, the anvil rod having a movable end, the movable end and the assembly end being configured to be able to move closer to or farther from each other to control the opening and closing of the anastomosis assembly, and the assembly end being provided with a stop block;

[0008] A driving assembly, comprising a driving module and a driving arm connecting the anastomotic assembly and the driving module, wherein the driving module is configured to drive the driving arm to move linearly;

[0009] A connecting block, comprising a first end and a second end arranged opposite to each other, wherein the first end is movably connected to the movable end, the second end is rotatably connected to the driving arm and movably connected to the assembly end, and the tip of the second end abuts against the stop block and can move relative to the stop block under the drive of the driving arm;

[0010] Wherein, the shift block includes a supporting arm which is arranged in affixed relation with the nail magazine and a shift arm which is arranged perpendicular to the nail magazine, and the second end is configured to slide along the supporting arm, and when the second end slides to be in affixed relation with the shift arm, the vertical distance between the first end and the nail magazine is a first distance, and when the second end slides to be away from the shift arm, the vertical distance between the first end and the nail magazine is a second distance, and the first distance is greater than the second distance.

[0011] As a further improvement of the present invention, a first abutting surface, a second abutting surface and a transition surface connecting the first abutting surface and the second abutting surface are formed on the supporting arm on the side of the supporting arm facing the connecting block, the first abutting surface is connected to the shift arm, and in the extension direction of the shift arm, the first abutting surface is higher than the second abutting surface, so that the transition surface is an inclined surface.

[0012] As a further improvement of the present invention, the angle between the transition surface and the plane where the second abutting surface is located is between 10° and 30°.

[0013] As a further improvement of the present invention, the second end of the connecting block has a connecting portion and an abutment portion arranged at the end of the connecting portion, the connecting portion is rotatably connected to the driving arm, and the abutment portion is provided with a propulsion surface facing the shift arm, and when the vertical distance between the first end and the nail magazine is a first distance, the propulsion surface is in contact with the shift arm.

[0014] As a further improvement of the present invention, a thrust angle is defined between an extension line or tangent line of the thrust surface and the support arm, and during the movement of the second end toward the shift arm, the thrust angle first increases, then decreases, and then increases again until the thrust surface fits against the shift arm.

[0015] As a further improvement of the present invention, the assembly end is provided with a first sliding groove, and the second end and the driving arm are correspondingly provided with a first through-hole, the first sliding groove and the first through-hole are aligned with each other, so that the second end, the assembly end and the driving arm can be movably connected by passing the first sliding groove and the first through-hole at the same time by using a first pin shaft. Moreover, the first pin shaft can slide along the first sliding groove.

[0016] As a further improvement of the present invention, the movable end is provided with a second slide groove, and the first end is correspondingly provided with a second perforation, the second slide groove and the second perforation are aligned with each other, so that the first end and the movable end can be movably connected by passing the second slide groove and the second perforation at the same time by using a second pin shaft, and the second pin shaft can slide along the second slide groove.

[0017] As a further improvement of the present invention, the driving module includes a driving motor and a screw that can rotate under the drive of the driving motor, the screw is provided with a transmission member, the driving arm is fixedly connected to the transmission member, and can move linearly with the rotation of the screw under the drive of the transmission member.

[0018] As a further improvement of the present invention, the driving module includes a driving motor and a telescopic rod that can be extended and retracted under the drive of the driving motor, the telescopic rod is provided with a transmission member, the driving arm is fixedly connected to the transmission member, and can move linearly as the telescopic rod is extended and retracted under the drive of the transmission member.

[0019] As a further improvement of the present invention, a clamping groove is provided at one end of the driving arm away from the second end, and a clamping portion is correspondingly provided on the transmission member, and the clamping portion penetrates into the clamping groove to drive the driving arm to move.

[0020] As a further improvement of the present invention, the stapler also includes a shell mounted on the outside of the driving arm, and a supporting portion is provided inside the shell and / or on the transmission member, and the supporting portion supports the driving arm so that the driving arm can slide horizontally along the extension direction of the nail magazine.

[0021] The beneficial effects of the present invention are as follows: the stapler of the present invention is provided with a connecting block between the anvil rod and the staple magazine, and the first end of the connecting block is movably connected to the movable end of the anvil rod, and the second end is rotatably connected to the driving arm of the driving assembly and is movably connected to the assembly end of the staple magazine, so that the second end can move under the drive of the driving arm; at the same time, a stop block is provided at the assembly end, and the second end of the connecting block can slide along the supporting arm of the stop block until the second end fits with the stop arm of the stop block, thereby changing the lifting angle of the anvil rod. Compared with the prior art, the stapler of the present invention can increase the lifting height of the anvil rod without changing the length of the stapler. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the stapler in accordance with the preferred embodiment of the present invention.

[0023] Figure 2 yes Figure 1 Exploded view of the anastomosis assembly, connecting block and drive arm.

[0024] Figure 3 yes Figure 2 A partial enlarged view of .

[0025] Figure 4 yes Figure 1 A partial enlarged view of the mid-drive assembly.

[0026] Figure 5 yes Figure 1 A cross-sectional view of the stapler when the vertical distance between the first end of the middle connecting block and the staple cartridge is the second distance.

[0027] Figure 6 yes Figure 5 A partial enlarged view of a.

[0028] Figure 7 yes Figure 5 A partial enlarged view of b.

[0029] Figure 8 yes Figure 1 A cross-sectional view of the stapler when the vertical distance between the first end of the middle connecting block and the staple cartridge is a first distance.

[0030] Fig. 9 yes Figure 8 A partial enlarged view of . DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] See also Figures 1 to 3 As shown, the present invention discloses a stapler 100, comprising a stapler assembly 1 and a drive assembly 2, wherein the drive assembly 2 can drive the stapler assembly 1 to open and close.

[0033] The anastomosis assembly 1 is roughly V-shaped and includes an anvil rod 11 and a staple magazine 12 connected to each other. The staple magazine 12 has an assembly end 121, and the anvil rod 11 has a movable end 111. The movable end 111 and the assembly end 121 are configured to be able to approach or move away from each other to control the opening and closing of the anastomosis assembly 1.

[0034] In this embodiment, the stapler 100 further includes a connecting block 3, the connecting block 3 is connected to the anvil rod 11 and the staple cartridge 12, the connecting block 3 includes a first end 31 and a second end 32 which are arranged opposite to each other, the first end 31 is movably connected to the movable end 111, and the second end 32 is movably connected to the assembly end 121. That is, the connecting block 3 is provided to connect the opening and closing sides of the anvil rod 11 and the staple cartridge 12, and the opening and closing range of the anvil rod 11 and the staple cartridge 12 can be adjusted by moving the connecting block 3.

[0035] Please combine Figure 4 , Figure 6 and Figure 7 As shown, the driving assembly 2 includes a driving module 21 and a driving arm 22 connecting the anastomosis assembly 1 and the driving module 21, and the driving module 21 is configured to drive the driving arm 22 to move linearly. The second end 32 is rotatably connected to the driving arm 22 to form a cam structure, and the second end 32 and the driving arm 22 are movably connected to the assembly end 121, and the second end 32 can move under the drive of the driving arm 22. In this way, by controlling the driving module 21, the driving arm 22 can be driven to move, so that the connecting block 3 also moves accordingly, thereby controlling the opening and closing range of the anvil rod 11 and the staple cartridge 12.

[0036] Specifically, the driving module 21 includes a driving motor 211 and a screw 212 that can rotate under the drive of the driving motor 211. The screw 212 is provided with a transmission member 213. The driving arm 22 is fixedly connected to the transmission member 213 and can move linearly with the rotation of the screw 212 under the drive of the transmission member 213.

[0037] Preferably, the screw rod 212 is fixedly connected to the driving motor 211 and can rotate under the drive of the driving motor 211 to drive the transmission member 213 to move. The end of the driving arm 22 away from the second end 32 is provided with a clamping groove 221, and the transmission member 213 is correspondingly provided with a clamping portion 2131. The clamping portion 2131 penetrates into the clamping groove 221 to drive the driving arm 22 to move.

[0038] In other embodiments, the screw rod 212 may be replaced by a telescopic rod, and the telescopic rod is driven to extend and retract by the driving motor 211 to drive the transmission member 213 to move, thereby driving the driving arm 22 to move.

[0039] The stapler 100 further includes a housing 4 sleeved on the outside of the driving arm 22, and a supporting portion is provided inside the housing 4 and / or on the transmission member 213, and the supporting portion supports the driving arm 22 so that the driving arm 22 can slide horizontally along the extension direction of the staple cartridge 12. The housing 4 includes a first housing 41 and a second housing 42, wherein the first housing 41 is sleeved on the outside of the driving arm 22, and the second housing 42 is used to cover the driving module 21.

[0040] The assembly end 121 is provided with a stop block 5 , and the end of the second end 32 abuts against the stop block 5 and can move relative to the stop block 5 under the drive of the driving arm 22 .

[0041] Specifically, the second end 32 of the connecting block 3 has a connecting portion 321 and an abutting portion 322 disposed at the end of the connecting portion 321 . The connecting portion 321 is rotatably connected to the driving arm 22 and is movably connected to the assembly end 121 .

[0042] Please combine Figures 5 to 9As shown, the shifting block 5 includes a supporting arm 51 which is fitted with the nail magazine 12 and a shifting arm 52 which is perpendicular to the nail magazine 12, and the second end 32 is configured to slide along the supporting arm 51, and when the second end 32 slides to be fitted with the shifting arm 52, the vertical distance between the first end 31 and the nail magazine 12 is a first distance, and when the second end 32 slides to be away from the shifting arm 52, the vertical distance between the first end 31 and the nail magazine 12 is a second distance, and the first distance is greater than the second distance.

[0043] On the side of the supporting arm 51 facing the connecting block 3, the supporting arm 51 has a first abutting surface 511, a second abutting surface 512, and a transition surface 513 connecting the first abutting surface 511 and the second abutting surface 512, wherein the first abutting surface 511 is connected to the shift arm 52 and is higher than the second abutting surface 512 in the extending direction of the shift arm 52, so that the transition surface 513 is an inclined surface. By setting the transition surface 513, the sliding process of the connecting block 3 is smoother. Preferably, the angle between the transition surface 513 and the horizontal plane where the second abutting surface 512 is located is between 10° and 30°.

[0044] In this embodiment, when the second end 32 is driven by the driving arm 22 to slide to fit with the shift arm 52, the second end 32 is located at the first abutting surface 511. At this time, the vertical distance between the first end 31 and the nail magazine 12 is the first distance. When the driving arm 22 is driven by the transmission member 213 to move until the second end 32 is located at the second abutting surface 512, the vertical distance between the first end 31 and the nail magazine 12 is the second distance. The first abutting surface 511 and the second abutting surface 512 are preferably horizontal surfaces. Of course, they can be set as inclined surfaces according to actual conditions, and there is no limitation to this.

[0045] Preferably, in this embodiment, the driving assembly 2 is further provided with a sensor (not provided), which can control the rotation of the screw rod 212, indirectly control the moving distance of the driving arm 22, and finally realize the lifting of the anvil rod 11. That is, the second end 32 of the connecting block 3 can slide back and forth on the first abutting surface 511, the second abutting surface 512 and the transition surface 513 through the sensor.

[0046] Optionally, the driving assembly 2 may also be provided with a positioning member between the transmission member 213 and the driving motor 211, the positioning member being integrally formed with the second housing 42 or being fixedly connected to the second housing 42, and when one end of the driving arm 22 abuts against the positioning member, the second end of the connecting block 3 is located at the second abutting surface 512. In other words, the sliding distance of the connecting block 3 is limited by the stop block 5 and the positioning member.

[0047] The abutting portion 322 includes a pushing surface 3221 disposed toward the shift arm 52 . The pushing surface 3221 moves relative to the shift block 5 under the drive of the driving arm 22 until it is in contact with the shift arm 52 .

[0048] There is a thrust angle between the extension line or tangent line of the thrust surface 3221 and the supporting arm 51 , and the thrust angle first increases, then decreases, and then increases again during the movement of the thrust surface 3221 toward the shift arm 52 until the thrust surface 3221 fits against the shift arm 52 .

[0049] Preferably, when the second end 32 is at the second abutting surface 512, the thrust angle of the connecting block 3 increases during the process of the second end 32 moving toward the shift arm 52. When the second end 32 moves from the second abutting surface 512 to the transition surface 513, the thrust angle decreases suddenly because the transition surface 513 is an inclined surface, and then gradually increases during the process of the second end 32 moving toward the shift arm 52. Of course, in other embodiments, it is not necessary to consider setting the transition surface 513 as an inclined surface, and then the thrust angle will change during the movement of the thrust surface 3221 toward the shift arm 52, and there is no limitation on this.

[0050] In this embodiment, the propulsion surface 3221 is a plane, that is, there is a propulsion angle between the extension line of the propulsion surface 3221 and the support arm 51. In other embodiments, the propulsion surface 3221 may also be a curved surface, in which case there is a propulsion angle between the tangent line of the propulsion surface 3221 and the support arm 51.

[0051] The assembly end 121 is provided with a first slide groove 1210, and the second end 32 and the driving arm 22 are both provided with a first through hole 320. The first slide groove 1210 and the first through hole 320 are aligned with each other so that the first pin shaft 6 can be used to simultaneously pass through the first slide groove 1210 and the first through hole 320 to flexibly connect the second end 32, the driving arm 22 and the assembly end 121, and the second end 32 can slide along the first slide groove 1210.

[0052] Preferably, the first through hole 320 has different shapes on the second end 32 and the driving arm 22. The first through hole 320 on the second end 32 is a circular hole, and the first through hole 320 on the driving arm 22 is in the shape of a U-shaped groove. Of course, in other embodiments, the shape of the first through hole 320 can be adjusted according to actual conditions, and there is no limitation to this.

[0053] In other words, by controlling the sliding position of the first pin shaft 6 in the first slide groove 1210, the sliding position of the second end 32 relative to the assembly end 121 is controlled, and the position of the first end 31 is changed under the drive of the second end 32, and the position of the anvil rod 11 is also changed.

[0054] Preferably, the movable end 111 is provided with a second slide groove 1110, and the first end 31 is correspondingly provided with a second through hole 310, and the second slide groove 1110 and the second through hole 310 are aligned with each other so that the second pin shaft 7 can pass through the second slide groove 1110 and the second through hole 310 at the same time to movably connect the first end 31 and the movable end 111, and the second pin shaft 7 can slide along the second slide groove 1110.

[0055] In this embodiment, when the second end 32 of the connecting block 3 is at the second abutting surface 512, the second pin shaft 7 is located at one end of the second slide groove 1110, and the thrust angle is less than 90 degrees, until the thrust surface 3221 of the abutting portion 322 abuts against the shift arm 52, and when the second end 32 of the connecting block 3 continues to slide toward the shift arm 52 under the drive of the driving arm 22, the abutting portion 322 is squeezed in different directions by the shift arm 52 and the driving arm 22, so that the thrust surface 3221 gradually fits with the shift arm 52, and the thrust angle is close to 90 degrees. At this time, the second pin shaft 7 is located at the other end of the second slide groove 1110. With such a configuration, compared with the case where the second slide groove 1110 is not provided, the lifting height of the anvil rod 11 can be further increased.

[0056] To summarize, the stapler 100 of the present invention sets a connecting block 3 between the anvil 11 and the nail magazine 12, so that the first end 31 of the connecting block 3 is movably connected to the movable end 111 of the anvil 11, the second end 32 is rotationally connected to the driving arm 22 of the driving assembly 2, and both are movably connected to the assembly end 121 of the nail magazine 12, so that the second end 32 can move under the drive of the driving arm 22; at the same time, by setting a stop block 5 at the assembly end 121, the tip of the second end 32 of the connecting block 3 is abutted against the supporting arm 51 of the stop block 5 and slides along the supporting arm 51 until the second end 32 is in contact with the stop arm 52 of the stop block 5, thereby changing the lifting angle of the anvil 11.

[0057] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A stapler, characterized in that: include: The anastomosis assembly comprises a staple cartridge and an anvil rod connected to each other, the staple cartridge having an assembly end, the anvil rod having a movable end, the movable end and the assembly end being configured to be able to move closer to or farther from each other to control the opening and closing of the anastomosis assembly, and the assembly end being provided with a stop block; A driving assembly, comprising a driving module and a driving arm connecting the anastomotic assembly and the driving module, wherein the driving module is configured to drive the driving arm to move linearly; A connecting block, comprising a first end and a second end arranged opposite to each other, wherein the first end is movably connected to the movable end, the second end is rotatably connected to the driving arm and movably connected to the assembly end, and the tip of the second end abuts against the stop block and can move relative to the stop block under the drive of the driving arm; In which, the shift block includes a supporting arm arranged in affixed relation with the nail magazine and a shift arm arranged perpendicular to the nail magazine, the second end is configured to slide along the supporting arm, and when the second end slides to be in affixed relation with the shift arm, the vertical distance between the first end and the nail magazine is a first distance, and when the second end slides away from the shift arm, the vertical distance between the first end and the nail magazine is a second distance, and the first distance is greater than the second distance; on the side of the supporting arm facing the connecting block, a first abutting surface, a second abutting surface and a transition surface connecting the first abutting surface and the second abutting surface are formed on the supporting arm, the first abutting surface is connected to the shift arm, and in the extension direction of the shift arm, the first abutting surface is higher than the second abutting surface, so that the transition surface is an inclined surface.

2. The stapler according to claim 1, characterized in that: The angle between the transition surface and the plane where the second abutting surface is located is between 10° and 30°.

3. The stapler according to claim 1, characterized in that: The second end of the connecting block has a connecting portion and an abutment portion arranged at the end of the connecting portion, the connecting portion is rotatably connected to the driving arm, the abutment portion is provided with a propulsion surface facing the shift arm, and when the vertical distance between the first end and the nail magazine is a first distance, the propulsion surface is in contact with the shift arm.

4. The stapler according to claim 3, characterized in that: A propulsion angle is defined between an extension line or a tangent line of the propulsion surface and the support arm. During the movement of the second end toward the shift arm, the propulsion angle first increases, then decreases, and then increases again until the propulsion surface fits the shift arm.

5. The stapler according to claim 1, characterized in that: The assembly end is provided with a first slide groove, and the second end and the driving arm are respectively provided with a first through hole, and the first slide groove and the first through hole are aligned with each other so that the second end, the assembly end and the driving arm can be movably connected by simultaneously passing through the first slide groove and the first through hole by using a first pin shaft, and the first pin shaft can slide along the first slide groove.

6. The stapler according to claim 1, characterized in that: The movable end is provided with a second slide groove, and the first end is correspondingly provided with a second through hole. The second slide groove and the second through hole are aligned with each other so that the first end and the movable end can be movably connected by passing the second slide groove and the second through hole at the same time by using the second pin shaft, and the second pin shaft can slide along the second slide groove.

7. The stapler according to claim 1, characterized in that: The driving module includes a driving motor and a screw that can rotate under the drive of the driving motor. A transmission member is provided on the screw. The driving arm is fixedly connected to the transmission member and can move linearly with the rotation of the screw under the drive of the transmission member.

8. The stapler according to claim 1, characterized in that: The driving module includes a driving motor and a telescopic rod that can be extended and retracted under the drive of the driving motor. The telescopic rod is provided with a transmission member. The driving arm is fixedly connected to the transmission member and can move linearly with the extension and retraction of the telescopic rod under the drive of the transmission member.

9. The stapler according to claim 7 or 8, characterized in that: A clamping groove is provided at one end of the driving arm away from the second end, and a clamping portion is correspondingly provided on the transmission member. The clamping portion penetrates into the clamping groove to drive the driving arm to move.

10. The stapler according to claim 7 or 8, characterized in that: The stapler also includes a shell sleeved on the outside of the driving arm, and a supporting portion is provided inside the shell and / or on the transmission member. The supporting portion supports the driving arm so that the driving arm can slide horizontally along the extension direction of the staple cartridge.

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