An anastomat pusher slider

Abstract

This invention discloses a stapler pusher slider. The bottom of the pusher slider is selectively provided with a bottom rolling element perpendicular to its direction of movement. The bottom rolling element mates with the inner surface of the staple cartridge base on the stapler. A top rolling element is selectively provided on the working surface of the pusher slider, mates with the lower inclined surface of the staple pusher on the stapler. A rolling module is selectively provided on the pusher slider to adapt to the elongated groove on the staple cartridge of the stapler. At least one of the bottom rolling element, top rolling element, and rolling module is provided. When the pusher slider moves along the longitudinal axis of the staple cartridge base, rolling friction occurs between the pusher slider and the staple cartridge base, between the pusher slider and the staple pusher, and between the pusher slider and the inner wall of the elongated groove. This invention reduces the friction between the pusher slider and the staple cartridge base, staple cartridge, and staple pusher through rolling, thereby reducing the striking force of the instrument. It has a simple structure and is easy to manufacture, and can be used for linear cutting and laparoscopic cutting staplers, etc.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically relating to a stapler pusher slider. Background Technology

[0002] Anastomosing devices are medical devices used to replace manual suturing. Their main working principle is to use titanium staples to separate or anastomose tissues, similar to a stapler. Currently, there are several main types of anastomosing devices, including skin anastomosing devices, round anastomosing devices for the digestive tract (esophagus, stomach, intestines, etc.), rectal anastomosing devices, round hemorrhoid anastomosing devices, and laparoscopic anastomosing devices.

[0003] Current staplers contain a staple ejection mechanism within the staple cartridge. This mechanism includes a staple ejector slider and a staple ejector. The staple ejector slider has an inclined surface that contacts the smooth surface of the staple ejector's bottom. The staple ejector moves slowly along the inclined surface of the slider, pushing the staple into the tissue for rapid and effective suturing. However, the interaction between the staple ejector slider and the staple cartridge generates significant friction, further increasing the instrument's firing force. This affects the staple formation and the surgeon's comfort. In actual production and assembly, dry powder lubricant is often sprayed onto the surfaces of the staple cartridge, staple holder, staple ejector, and staple ejector slider to reduce friction during movement. However, the dry powder lubricant forms an ultra-thin grease film on these components, which is easily damaged, leading to a gradual increase in friction as movement continues. Summary of the Invention

[0004] To address the technical problems existing in the prior art, the present invention aims to provide a stapler pusher slider.

[0005] To achieve the above objectives and technical effects, the technical solution adopted by this invention is as follows:

[0006] A stapler pusher slider has several bottom rolling elements selectively arranged at its bottom along a direction perpendicular to its movement. The bottom rolling elements cooperate with the inner surface of the staple cartridge base on the stapler. The pusher slider has a working surface with a beveled feature. Several top rolling elements are selectively arranged on the working surface. The top rolling elements cooperate with the lower bevel of the staple pusher on the stapler. The pusher slider also selectively has a rolling module adapted to the elongated groove on the staple cartridge on the stapler. At least one of the bottom rolling elements, top rolling elements, and rolling modules is provided. When the pusher slider moves along the longitudinal axis of the staple cartridge base, rolling friction is generated between the pusher slider and the staple cartridge base, between the pusher slider and the staple pusher, and between the pusher slider and the inner sidewall of the elongated groove.

[0007] Furthermore, the pusher slider includes a central support plate and two support plates symmetrically arranged on the left and right sides of the central support plate. The support plates are identical in structure, with their bottom surfaces flush and integrated. Each of the support plates has several grooves at its bottom for accommodating bottom rolling elements. The working surfaces at the top of the support plates have two continuous inclined sections, which are adapted to the pusher. Several internal grooves for accommodating top rolling elements are spaced apart on the working surfaces of the support plates. During the movement of the pusher slider, the top rolling elements cooperate with the lower inclined surface of the pusher, pushing the pusher upward along the groove of the staple cartridge. The pusher then pushes the suture staples in the groove of the staple cartridge to penetrate the tissue.

[0008] Furthermore, the bottom rolling element is a cylindrical or elliptical roller, and the bottom of the push pin slider has several grooves spaced apart to accommodate the rollers. The grooves are arranged in parallel, and each groove contains one roller. The size and shape of the roller are adapted to the size and shape of the groove.

[0009] Furthermore, the bottom rolling element is a spherical ball, and the bottom of the push pin slider has several grooves for accommodating the spherical balls, with one spherical ball in each groove.

[0010] Furthermore, the top rolling element is a cylindrical or elliptical working roller, and several inner grooves for accommodating the top rolling element are respectively opened at intervals on the working surfaces of the first support plate and the second support plate. Each inner groove is provided with a working roller, and the size and shape of the working roller are adapted to the size and shape of the inner groove.

[0011] Furthermore, the top rolling element is a spherical ball, and several inner grooves for accommodating the spherical ball are respectively opened on the working surfaces of the first support plate and the second support plate, with one spherical ball disposed in each inner groove.

[0012] Furthermore, a rolling module is installed inside the intermediate support plate, and part of the rolling module is exposed outside the intermediate support plate. During the movement of the push pin slider, the rolling module contacts the inner sidewall of the long groove and generates rolling friction.

[0013] Furthermore, the intermediate support plate has a right-angled trapezoidal cross-section, and the rolling module includes two rollers of different sizes, Roller 1 and Roller 2, installed inside the intermediate support plate. The height of Roller 1 is smaller than the height of Roller 2. One side wall of Roller 1 and the side wall of Roller 2 respectively contact and cooperate with the side walls on both sides of the long groove inside the nail cartridge. By rotating Roller 1 and Roller 2 inside the side wall of the long groove, the friction between the nail pusher slider and the nail cartridge is reduced.

[0014] This application also discloses a stapler comprising a stapler pusher slider as described above.

[0015] Furthermore, the stapler includes a main body and a disposable loading unit. The disposable loading unit comprises, from top to bottom, a staple seat cover, a staple seat, a staple cartridge, a staple pusher, and a staple cartridge base, all arranged and adapted to each other. The staple cartridge contains a number of staples. A long groove is formed on the staple cartridge along the central axis. A cutting blade pushes a staple pusher slider to move along the longitudinal axis of the staple cartridge base. The bottom rolling element of the staple pusher slider engages with the inner surface of the staple cartridge base, generating rolling friction between them. The intermediate support plate moves within the long groove. Rollers one and two rotate within the sidewall of the long groove, reducing the friction between the staple pusher slider and the staple cartridge. The top rolling elements on support plates one and two engage with the lower inclined surface of the staple pusher, generating rolling friction between them. This pushes the staple pusher upward along the groove of the staple cartridge. The staple pusher then pushes the staples in the groove of the staple cartridge to penetrate the tissue. The tip of the staple is inserted into the groove of the staple seat, forming a "B" shape, completing the suturing of the tissue.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] This invention discloses a stapler pusher slider, which reduces the friction between the pusher slider and the staple cartridge base, staple chamber, and pusher by rolling, thereby reducing the firing force of the instrument. In addition, the stapler pusher slider has the characteristics of simple structure and easy manufacturing, and can be applied to the fields of linear cutting staplers, laparoscopic cutting staplers, etc. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0019] Figure 2 This is an exploded view of the present invention;

[0020] Figure 3 This is a cross-sectional view of the anvil cover, anvil, nail cartridge, pusher slider, and nail box base of the present invention after they are closed.

[0021] Figure 4 This is a three-dimensional structural diagram of the push pin slider of the present invention;

[0022] Figure 5 This is a schematic diagram of the three-dimensional structure of the back of the present invention;

[0023] Figure 6 This is a three-dimensional structural diagram of the push pin slider after the cylindrical roller and the cylindrical roller are installed according to the present invention;

[0024] Figure 7 This is a schematic diagram of the bottom structure of the push pin slider of the present invention;

[0025] Figure 8 This is a schematic diagram of the structure of the intermediate support plate of the present invention. Detailed Implementation

[0026] The present invention will now be described in detail so that its advantages and features can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention.

[0027] The following provides a brief overview of one or more aspects to offer a basic understanding of them. This overview is not an exhaustive summary of all conceived aspects, nor is it intended to identify key or decisive elements of all aspects, nor to define the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form to prepare for the more detailed descriptions that follow.

[0028] In the description of this invention, the terms "inner", "outer", "vertical", "horizontal", "upper", "lower", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and do not require that this invention must be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0029] Example 1

[0030] Figure 1-8 As shown, this embodiment discloses a stapler pusher slider 6. The bottom of the pusher slider 6 is provided with a plurality of cylindrical rollers 11 perpendicular to its moving direction. The rollers 11 cooperate with the inner surface of the staple cartridge base 9 on the stapler. The pusher slider 6 has a working surface with inclined features. A plurality of cylindrical working rollers 10 are provided on the working surface. The working rollers 10 cooperate with the lower inclined surface of the staple pusher 8 on the stapler. The pusher slider 6 is also provided with a rolling module adapted to the long groove 17 provided on the staple cartridge 5 on the stapler. When the pusher slider 6 moves along the longitudinal axis of the staple cartridge base 9, rolling friction is generated between the pusher slider 6 and the staple cartridge base 9, rolling friction is generated between the pusher slider 6 and the staple pusher 8, and rolling friction is generated between the pusher slider 6 and the inner sidewall of the long groove 17.

[0031] The pusher slider 6 includes a central support plate 14 and two support plates 12 and 13 symmetrically arranged on the left and right sides of the central support plate 14. The support plates 12 and 13 have the same structure. The bottom surfaces of the support plates 12, 13, and 14 are flush and integrated. The bottom of the support plates 12, 13, and 14 are all provided with several grooves 61 for accommodating the rollers 11. The grooves 61 are arranged in parallel and are perpendicular to the direction of movement of the pusher slider 6. The extension, that is, the length direction of the groove 61 is perpendicular to the moving direction of the pusher slider 6. The number, shape and size of the groove 61 are adapted to the number, shape and size of the roller 11. The working surfaces of the top of the support plate 12 and the support plate 23 have two continuous inclined surface features, which are adapted to the pusher 8. Several inner grooves 123 are opened at intervals on the working surfaces of the support plate 12 and the support plate 23. The number, size and shape of the working roller 10 are adapted to the number, size and shape of the inner grooves 123.

[0032] A rolling module is installed inside the intermediate support plate 14, with part of the rolling module exposed outside the intermediate support plate 14. During the movement of the pusher slider 6, the rolling module contacts the inner wall of the long groove 17 and generates rolling friction, which reduces the friction between the pusher slider 6 and the nail cartridge 5, thereby reducing the firing force of the entire instrument.

[0033] On the other hand, this embodiment also discloses a stapler, including an instrument body 1 and a disposable loading unit 2. The disposable loading unit 2 mainly includes a matching anvil cover 3, anvil 4, staple cartridge 5, staple 7, staple pusher 8, staple cartridge base 9, and a staple pusher slider 6 as described above. The bottom of the staple pusher slider 6 is provided with several rollers 11, which cooperate with the inner surface of the staple cartridge base 9. During the movement of the staple pusher slider 6, the friction between the staple pusher slider 6 and the staple cartridge base 9 is reduced by the rotation of the rollers 11 at its bottom.

[0034] Example 2

[0035] Figure 1-8As shown, this embodiment discloses a stapler pusher slider, applied to a laparoscopic stapler. The bottom of the pusher slider 6 is provided with several cylindrical rollers 11 perpendicular to its moving direction. The rollers 11 cooperate with the inner surface of the staple cartridge base 9 on the stapler. The pusher slider 6 has a working surface with inclined features. Several working rollers 10 are provided on the working surface. The working rollers 10 cooperate with the lower inclined surface of the staple pusher 8 on the stapler. The pusher slider 6 is also provided with a rolling module adapted to the long groove 17 provided on the staple cartridge 5 on the stapler. When the pusher slider 6 moves along the longitudinal axis of the staple cartridge base 9, rolling friction is generated between the pusher slider 6 and the staple cartridge base 9, between the pusher slider 6 and the staple pusher 8, and between the pusher slider 6 and the inner sidewall of the long groove 17.

[0036] On the other hand, this embodiment also discloses a stapler, which includes an instrument body 1 and a disposable loading unit 2. The disposable loading unit 2 mainly includes a matching anvil cover 3, anvil 4, staple cartridge 5, staple 7, staple pusher 8, staple cartridge base 9, and a staple pusher slider 6 as described above. The bottom of the staple pusher slider 6 is provided with several cylindrical rollers 11, which cooperate with the inner surface of the staple cartridge base 9. During the movement of the staple pusher slider 6, the friction between the staple pusher slider 6 and the staple cartridge base 9 is reduced by the rotation of the cylindrical rollers 11 at its bottom.

[0037] As one specific implementation, the bottom of the push pin slider 6 is provided with a number of grooves 61 for accommodating rollers 11. The grooves 61 are arranged in parallel and extend in a direction perpendicular to the moving direction of the push pin slider 6. That is, the length direction of the grooves 61 is perpendicular to the moving direction of the push pin slider 6. Each groove 61 is provided with one roller 11, and the two are compatible, with the same length, the same diameter, and the same number.

[0038] As one specific implementation, the pusher block 6 includes a central support plate 14 and support plates 12 and 13 symmetrically arranged on the left and right sides of the central support plate 14. The support plates 12 and 13 have the same structure. The bottom surfaces of the support plates 12, 13 and 14 are flush and integrated. The bottom of the support plates 12, 13 and 14 are provided with several grooves 61. The working surfaces of the top of the support plates 12 and 13 are respectively characterized by two continuous inclined surfaces, which are adapted to the pusher 8. Several parallel inner grooves 123 are provided at intervals on the working surfaces of the support plates 12 and 13. Each inner groove 123 is provided with a working roller 10. The working roller 10 has a cylindrical structure and its size is adapted to the size of the inner groove 123. The length, diameter and number are the same.

[0039] The intermediate support plate 14 has a right-angled trapezoidal cross-section. The rolling module includes two rollers, 15 and 16, of different sizes and both cylindrical in shape, installed inside the intermediate support plate 14. The height of roller 15 is less than the height of roller 16. Rollers 15 and 16 are partially exposed outside the intermediate support plate 14. When the pusher slider 6 moves along the longitudinal axis of the nail cartridge base 9, the sidewalls of roller 15 and 16 respectively contact and engage with the sidewalls on both sides of the long groove 17 inside the nail cartridge 5. Rollers 15 and 16 can rotate. By rotating rollers 15 and 16 within the sidewalls of the long groove 17, the friction between the pusher slider 6 and the nail cartridge 5 is reduced, thereby reducing the firing force of the entire instrument.

[0040] The working principle of this invention is as follows:

[0041] During the firing process using the operating handle of the instrument body 1, the cutting blade pushes the nail pusher slider 6 to move along the longitudinal axis of the nail magazine base 9. During the movement of the nail pusher slider 6, the roller 11 engages with the inner surface of the nail magazine base 9. The rotation of the roller 11 at its bottom reduces the friction between the nail pusher slider 6 and the nail magazine base 9. Simultaneously, the cylindrical roller 10 on the first support plate 12 and the second support plate 13 engages with the lower inclined surface of the nail pusher 8, pushing the nail pusher 8 upwards along the groove of the nail magazine 5. The suture staples 7 in the slot of the staple cartridge 5 are pushed by the staple pusher 8 to penetrate the tissue. The tip of the staple staple 7 is inserted into the groove of the anvil seat 4, forming a perfect "B" shape to suture the tissue. Due to the rolling of the working roller 10, the friction between the staple pusher slider 6 and the bottom surface of the staple pusher 8 is effectively reduced. As the intermediate support plate 14 moves in the long slot 17, the friction between the staple pusher slider 6 and the staple cartridge 5 is reduced by the rotation of roller 15 and roller 2 16 in the side wall of the long slot 17, thereby reducing the firing force of the entire instrument.

[0042] It should also be noted that in this invention, one or more of the bottom rolling element, top rolling element and rolling module can be selected and combined to ensure that when the pusher slider 6 moves along the longitudinal axis of the nail box base 9, rolling friction is generated between the pusher slider 6 and the nail box base 9, rolling friction is generated between the pusher slider 6 and the pusher 8, and rolling friction is generated between the pusher slider 6 and the inner sidewall of the long groove 17, thereby reducing the striking force of the stapler.

[0043] The parts or structures not specifically described in this invention include the instrument body 1, the anvil seat cover 3, the anvil seat 4, the staple cartridge 5, the suture staple 7, the staple pusher 8, and the staple cartridge base 9, etc., which are made using existing technology. Those skilled in the art can determine the structure based on existing technology, so they will not be described in detail here.

[0044] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A stapler pusher slider, characterized in that, The stapler includes a main body and a disposable loading unit. The disposable loading unit includes a staple seat cover, a staple seat, a staple cartridge, a staple pusher, and a staple cartridge base arranged and adapted from top to bottom. The staple cartridge contains a number of staples, and a long groove is formed on the staple cartridge along the central axis. The bottom of the pusher slider is provided with several bottom rolling elements perpendicular to its moving direction. The bottom rolling elements cooperate with the inner surface of the staple cartridge base on the stapler. The pusher slider has a working surface with inclined features. Several top rolling elements are provided on the working surface. The top rolling elements cooperate with the lower inclined surface of the pusher on the stapler. The pusher slider is also provided with a rolling module that matches the long groove provided on the staple cartridge on the stapler. When the pusher slider moves along the longitudinal axis of the staple cartridge base, rolling friction is generated between the pusher slider and the staple cartridge base, between the pusher slider and the pusher, and between the pusher slider and the inner sidewall of the long groove. The pusher slider includes a central support plate and two support plates symmetrically arranged on the left and right sides of the central support plate. The support plates are identical in structure, and the bottom surfaces of the support plates are flush and integrated. The bottom of the support plates are provided with several grooves for accommodating bottom rolling elements. The working surfaces of the top of the support plates are provided with two continuous inclined surfaces to match the pusher. Several inner grooves for accommodating top rolling elements are provided on the working surfaces of the support plates. During the movement of the pusher slider, the top rolling elements cooperate with the lower inclined surface of the pusher to push the pusher upward along the groove of the staple cartridge. The pusher then pushes the suture staples in the groove of the staple cartridge to penetrate the tissue. The bottom rolling element is a cylindrical or elliptical roller. The bottom of the push pin slider has several grooves at intervals to accommodate the rollers. The grooves are arranged in parallel, and each groove contains one roller. The size and shape of the roller are adapted to the size and shape of the groove. The top rolling element is a cylindrical or elliptical working roller. Several inner grooves for accommodating the top rolling element are respectively opened at intervals on the working surfaces of the first support plate and the second support plate. A working roller is set in each inner groove, and the size and shape of the working roller are adapted to the size and shape of the inner groove. The intermediate support plate is equipped with a rolling module inside, and part of the rolling module is exposed outside the intermediate support plate. During the movement of the push pin slider, the rolling module contacts the inner sidewall of the long groove and generates rolling friction. The intermediate support plate has a right-angled trapezoidal cross-section. The rolling module includes two rollers of different sizes, Roller 1 and Roller 2, installed inside the intermediate support plate. The height of Roller 1 is smaller than the height of Roller 2. One side wall of Roller 1 and the side wall of Roller 2 respectively contact and cooperate with the side walls on both sides of the long groove inside the nail cartridge. By rotating Roller 1 and Roller 2 inside the side wall of the long groove, the friction between the nail pusher slider and the nail cartridge is reduced.

2. The stapler pusher slider according to claim 1, characterized in that, The bottom rolling element is a spherical ball, and the bottom of the push pin slider has several grooves for accommodating the spherical balls, with one spherical ball in each groove.

3. The stapler pusher slider according to claim 1, characterized in that, The top rolling element is a spherical ball. Several inner grooves for accommodating the spherical balls are respectively opened on the working surfaces of the first support plate and the second support plate, and one spherical ball is set in each inner groove.

4. A stapler, characterized in that, The stapler pusher slider includes any one of claims 1-3.

5. The anastomosis device according to claim 4, characterized in that, The stapler includes a main body and a disposable loading unit. The disposable loading unit comprises, from top to bottom, a staple seat cover, a staple seat, a staple cartridge, a staple pusher, and a staple cartridge base, all arranged and adapted to each other. The staple cartridge contains several staples. A long groove is formed on the staple cartridge along the central axis. A cutting blade pushes a staple pusher slider to move along the longitudinal axis of the staple cartridge base. The bottom rolling element of the staple pusher slider engages with the inner surface of the staple cartridge base, generating rolling friction between them. An intermediate support plate moves within the long groove. Rollers one and two rotate within the sidewall of the long groove, reducing the friction between the staple pusher slider and the staple cartridge. The top rolling elements on support plates one and two engage with the lower inclined surface of the staple pusher, generating rolling friction between them. This pushers the staple pusher to move upward along the groove of the staple cartridge. The staple pusher then pushes the staples in the groove of the staple cartridge to penetrate the tissue. The tip of the staple is inserted into the groove of the staple seat, forming a "B" shape, completing the suturing of the tissue.

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