A stapler

Abstract

The present invention discloses a stapler, comprising an execution component and an instrument body on which the execution component is installed, the instrument body comprising a shell, a firing handle pivotally connected to the shell, a rack, a rack paddle and a rack paddle baffle, the firing handle is connected to the rack through the rack paddle; the rack is an interval tooth shape, and is provided with an A tooth located at the extreme firing position of a first nail magazine and a B tooth located at the extreme firing position of a second nail magazine, there is no tooth structure between the A tooth and the B tooth, and the length of the first nail magazine is smaller than that of the second nail magazine; the rack paddle baffle is slidably connected to the shell, and the greater the length of the nail magazine installed in the execution component, the farther the rack paddle baffle is from the rotation center of the firing handle; therefore, it can be suitable for nail magazines of different specifications, and different firing distances can be set according to different nail magazine components, thereby solving the problem that a short-stroke nail magazine can continue to fire after reaching the end of the stroke, thereby avoiding damage to the instrument or additional harm to the patient.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and more specifically, to a stapler. Background Art

[0002] As an alternative to manual suturing, the stapler uses titanium nails to separate or anastomose tissues. It is mainly used for laparoscopic gastrointestinal reconstruction and closure of stumps or incisions during organ resection surgery. It can also be used for separation and resection of liver parenchyma, pancreas, kidney and spleen. It is suitable for a variety of open or minimally invasive general surgery, obstetrics and gynecology, urology, thoracic surgery and pediatric surgeries.

[0003] The existing staplers are roughly divided into two categories. One category is a device body 1 and an actuator 2 as a whole, such as Figure 1 As shown, the distance cut by the stapler when it is fired is fixed, that is, only a stapler of a fixed length can be installed. Therefore, when the patient's diseased tissue requires different resection lengths, different staplers are required, which increases the patient's medical costs; another type of instrument body 1 and the actuator 2 are separated, and the instrument body 1 can be used for actuators 2 of different lengths, such as Figure 2 As shown, since the firing length of the instrument body 1 needs to adapt to the longest staple cartridge, the end point of the stroke cannot be determined when firing a short-stroke suture staple cartridge, and there is a possibility of continuous firing, which may cause the cutting knife to break or the instrument to be damaged, and the cutting knife cannot be pulled back to reset, which may cause fatal harm to the patient.

[0004] In summary, how to adapt to different nail magazine assemblies and set different firing distances according to different nail magazine assemblies is a problem that needs to be urgently solved by technical personnel in this field. Summary of the invention

[0005] In view of this, an object of the present invention is to provide a stapler, which realizes the function of setting different firing distances according to different staple magazine assemblies by setting a rack with incomplete teeth and an adjustable position of the rack paddle block.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A stapler comprises an actuator and an instrument body on which the actuator is mounted, wherein the instrument body comprises a housing, a firing handle pivotally connected to the housing, a rack, a rack paddle and a rack paddle baffle, wherein the firing handle is connected to the rack through the rack paddle;

[0008] The rack is of an interval tooth shape, and is provided with an A tooth located at the limit firing position of the first nail magazine and a B tooth located at the limit firing position of the second nail magazine, and there is no tooth structure between the A tooth and the B tooth, and the length of the first nail magazine is less than the length of the second nail magazine;

[0009] The rack paddle baffle is slidably connected to the housing, and the longer the length of the staple cartridge installed in the actuating member, the farther the rack paddle baffle is from the rotation center of the firing handle.

[0010] Preferably, there is also a C tooth on the rack at the extreme firing position of the third staple cartridge, and there is no tooth profile structure between the B tooth and the C tooth;

[0011] The length of the second staple cartridge is less than the length of the third staple cartridge.

[0012] Preferably, one of the housing and the rack paddle baffle is provided with a sliding groove, and the other is provided with a slider that is snap-fitted with the sliding groove;

[0013] One end of the rack paddle baffle away from the firing handle is connected to the housing through an elastic member.

[0014] Preferably, one end of the elastic member is fixedly connected to the housing, and the other end abuts or is connected to the end face of the rack paddle baffle.

[0015] Preferably, the number of the sliding grooves is two, and the two sliding grooves are respectively perpendicular to both ends of the rack paddle baffle.

[0016] Preferably, there are several continuous teeth between the firing starting point of the rack and the A tooth.

[0017] Preferably, the tooth profiles of the continuous teeth, the A tooth, the B tooth, and the C tooth are all the same.

[0018] The stapler provided by the present invention includes an actuating member and an instrument main body for installing the actuating member. The instrument main body includes a housing, a firing handle pivotally connected to the housing, a rack, a rack paddle, and a rack paddle baffle. The firing handle is connected to the rack through the rack paddle; the rack is an intermittent tooth profile, and there is an A tooth at the extreme firing position of the first staple cartridge and a B tooth at the extreme firing position of the second staple cartridge on the rack. There is no tooth profile structure between the A tooth and the B tooth, and the length of the first staple cartridge is less than the length of the second staple cartridge; the rack paddle baffle is slidably connected to the housing, and the longer the length of the staple cartridge installed in the actuating member, the farther the rack paddle baffle is from the rotation center of the firing handle.

[0019] It should be noted that the specific lengths of the first staple cartridge and the second staple cartridge here can be determined according to the needs in actual surgery. Of course, C teeth at the extreme firing position of the third extreme staple cartridge, D teeth at the extreme firing position of the fourth extreme staple cartridge, etc. can also be provided after the B tooth according to actual needs (there is no tooth profile structure between the B tooth and the C tooth and between the C tooth and the D tooth).

[0020] After the firing handle is fired, the rack paddle contacts the teeth on the rack and drives the rack to move toward the actuator. When the first nail magazine is installed, under the restriction of the rack paddle baffle, the extreme position that the rack paddle can contact is tooth A. When the rack paddle abuts against tooth A, the actuator is in place, cutting and suturing the tissue to the extreme position. At this time, the firing handle is fired again. Since the rack paddle cannot abut against tooth B, the actuator cannot continue to move forward; in the case of installing the second nail magazine, since the rack paddle baffle is farther from the rotation center of the firing handle, the rack paddle can still abut against tooth B, so after reaching the end of the travel of the first nail magazine, the actuator can still continue to move forward until it reaches the end of the travel of the second nail magazine.

[0021] Therefore, the stapler provided by the present invention is not only suitable for nail magazines of different specifications, but also can realize different firing distances according to different nail magazine components, thereby solving the problem that a short-stroke nail magazine can continue to fire after reaching the end of the stroke, thereby avoiding damage to the instrument or additional harm to the patient. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the structure of a stapler adapted for a single staple cartridge in the prior art;

[0024] Figure 2 It is a schematic diagram of the structure of a stapler that is adapted to multiple staple cartridges in the prior art;

[0025] Figure 3 A schematic diagram of a firing structure of a specific embodiment of the stapler provided by the present invention;

[0026] Figure 4 for Figure 3 Schematic diagram of the structure of the rack;

[0027] Figure 5 for Figure 3 The disassembled schematic diagram of the stapler firing 30 staple cartridges;

[0028] Figure 6 for Figure 3 Schematic diagram of the disassembly of the stapler when firing the 45-staple cartridge.

[0029] Figures 1-6 middle:

[0030] 1 is the instrument body, 11 is the housing, 12 is the firing handle, 13 is the rack slider, 14 is the rack, 141 is tooth A, 142 is tooth B, 143 is tooth C, 144 is the continuous teeth, 15 is the rack slider baffle, and 2 is the execution component. Detailed implementation manners

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] The core of the present invention is to provide a stapler, which realizes the function of setting different firing distances according to different cartridge assemblies by setting the non-full teeth of the rack and the adjustable position of the rack slider baffle.

[0033] Please refer to Figures 1-6 , Figure 1 which is a schematic structural diagram of a stapler adapted to a single cartridge in the prior art; Figure 2 which is a schematic structural diagram of a stapler adapted to multiple cartridges in the prior art; Figure 3 which is a schematic diagram of the firing structure of a specific embodiment of the stapler provided by the present invention; Figure 4 is Figure 3 a schematic structural diagram of the rack in Figure 5 is Figure 3 a disassembled diagram of the stapler when firing a 30-cartridge; Figure 6 is Figure 3 a disassembled diagram of the stapler when firing a 45-cartridge in

[0034] The stapler provided by the present invention includes an execution component 2 and an instrument body 1 for installing the execution component 2. The instrument body 1 includes a housing 11, a firing handle 12 pivotally connected to the housing 11, a rack 14, a rack slider 13, and a rack slider baffle 15. The firing handle 12 is connected to the rack 14 through the rack slider 13. The rack 14 has an intermittent tooth shape. Tooth A 141 located at the extreme firing position of the first cartridge and tooth B 142 located at the extreme firing position of the second cartridge are provided on the rack 14. There is no tooth structure between tooth A 141 and tooth B 142. The length of the first cartridge is less than the length of the second cartridge. The rack slider baffle 15 is slidably connected to the housing 11, and the greater the length of the cartridge installed in the execution component 2, the farther the rack slider baffle 15 is from the rotation center of the firing handle 12.

[0035] Tooth A 141 and tooth B 142 represent the extreme firing position of the first nail magazine and the extreme firing position of the second nail magazine, respectively, that is, the distance from the firing starting point of the rack 14 to tooth A 141 is equal to the stroke length of the first nail magazine, and the distance from the firing starting point of the rack 14 to tooth B 142 is equal to the stroke length of the second nail magazine.

[0036] It should be noted that the specific lengths of the first nail magazine and the second nail magazine can be determined according to the needs of the actual surgical operation. Of course, according to actual needs, a C tooth 143 located at the third limit nail magazine limit firing position and a D tooth located at the fourth limit nail magazine limit firing position can be set behind the B tooth 142 (there is no tooth structure between the B tooth and the C tooth and between the C tooth and the D tooth).

[0037] The position of the rack paddle baffle 15 is affected by the length of the nail magazine of the execution part 2. Since the end of the rack paddle baffle 15 close to the firing handle 12 abuts against the execution part 2, the longer the loaded nail magazine is, the farther the rack paddle baffle 15 is from the firing handle 12.

[0038] The rack paddle baffle 15 is slidably connected to the housing 11 to meet the need of changing the distance between the rack paddle baffle 15 and the rotation center of the firing handle 12. Preferably, one of the housing 11 and the rack paddle baffle 15 may be provided with a slide groove, and the other may be provided with a slider engaged with the slide groove; the end of the rack paddle baffle 15 away from the firing handle 12 is connected to the housing 11 through an elastic member.

[0039] Preferably, one end of the elastic member is fixedly connected to the housing 11 , and the other end is abutted against or connected to the end surface of the rack paddle baffle 15 .

[0040] When the elastic member only contacts the end surface of the rack paddle baffle 15 , considering the reset problem of the rack paddle baffle 15 , the length of the slide groove should be set equal to or greater than the natural length of the elastic member.

[0041] Preferably, a spring can be selected as the elastic member. For parameters such as the material and size of the spring, please refer to the prior art according to actual production needs, and will not be described in detail here.

[0042] Therefore, one end of the rack paddle baffle 15 is abutted by the actuator 2 , and the other end is connected to the elastic member, so that the position of the rack paddle gear 15 is changed according to the length of the actuator 2 .

[0043] Preferably, there may be two slide grooves, and the two slide grooves are respectively perpendicular to the two ends of the rack paddle baffle 15 to improve the stability of the sliding connection between the rack paddle baffle 15 and the housing 11 .

[0044] In addition, a plurality of gear positions corresponding to different nail magazines may be provided on the housing 11, and the gear position of the rack paddle baffle 15 may be changed by manual adjustment.

[0045] After the firing handle 12 is fired, the rack paddle 13 contacts the teeth on the rack 14 and drives the rack 14 to move toward the actuator 2. When installing the first nail magazine, please refer to Figure 5 , under the restriction of the rack paddle baffle 15, the extreme position that the rack paddle 13 can contact is the A tooth 141. When the rack paddle 13 abuts against the A tooth 141, the execution component 2 is executed in place, cutting and suturing the tissue to the extreme position. At this time, the firing handle 12 is fired again. Since the rack paddle 13 cannot abut against the B tooth 142, the execution component 2 cannot continue to move forward; in the case of installing the second nail magazine, since the rack paddle baffle 15 is farther from the rotation center of the firing handle 12, the rack paddle 13 can still abut against the B tooth 142. Therefore, after reaching the end of the stroke of the first nail magazine, the execution component 2 can still continue to move forward until it reaches the end of the stroke of the second nail magazine.

[0046] Therefore, the stapler provided by the present invention is not only suitable for nail magazines of different specifications, but also can realize different firing distances according to different nail magazine components, thereby solving the problem that a short-stroke nail magazine can continue to fire after reaching the end of the stroke, thereby avoiding damage to the instrument or additional harm to the patient.

[0047] Based on the above embodiment, the rack 14 may also be provided with a C tooth 143 located at the extreme firing position of the third nail magazine, and there is no tooth structure between the B tooth 142 and the C tooth 142; the length of the second nail magazine is smaller than that of the third nail magazine.

[0048] Please refer to Figure 6 When the second nail magazine is installed, the rack paddle 13 is restricted by the rack paddle baffle 15, and the limit position that can be contacted by the rack paddle 13 is the B tooth 142. When the rack paddle 13 abuts against the B tooth 142, the execution component 2 is executed in place, cutting and suturing the tissue to the limit position. At this time, the firing handle 12 is fired again. Since the rack paddle 13 cannot abut against the C tooth 143, the execution component 2 cannot continue to move forward; in the case of installing the third nail magazine, since the rack paddle baffle 15 is farther from the rotation center of the firing handle 12, the rack paddle 13 can still abut against the C tooth 143. Therefore, after reaching the end of the stroke of the second nail magazine, the execution component 2 can still continue to move forward until it reaches the end of the stroke of the third nail magazine.

[0049] In a specific embodiment, the rack 14 is provided with an A tooth 141 located at the 30-nail magazine limit position, a B tooth 142 located at the 45-nail magazine limit position, and a C tooth 143 located at the 60-nail magazine limit position.

[0050] Preferably, please refer to Figure 4 A plurality of continuous teeth 144 may be provided between the firing starting point of the rack 14 and the A tooth 141 to reduce the firing force required for each firing by increasing the number of firings.

[0051] Preferably, the tooth profiles of the continuous teeth 144, tooth A 141, tooth B 142, and tooth C 143 are the same, which facilitates the machining of the rack 14 and reduces the production cost. The specific tooth profile can be determined with reference to the prior art according to the needs in actual production, and will not be elaborated here.

[0052] In this specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same and similar parts among the various embodiments, reference can be made to each other.

[0053] The stapler provided by the present invention has been introduced in detail above. Specific examples are used herein to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A stapler, comprising an execution component (2) and an instrument body (1) for mounting the execution component (2), characterized in that, The instrument body (1) includes a housing (11), a firing handle (12) pivotally connected to the housing (11), a rack (14), a rack paddle (13), and a rack paddle baffle (15). The firing handle (12) is connected to the rack (14) through the rack paddle (13). The rack (14) has an intermittent tooth shape. An A tooth (141) is provided on the rack (14) at the extreme firing position of the first staple cartridge, and a B tooth (142) is provided at the extreme firing position of the second staple cartridge. There is no tooth-shaped structure between the A tooth (141) and the B tooth (142). The length of the first staple cartridge is less than the length of the second staple cartridge. The rack paddle baffle (15) is slidably connected to the housing (11). The longer the length of the staple cartridge installed in the actuating member (2), the farther the rack paddle baffle (15) is from the rotation center of the firing handle (12), so as to meet the need to change the distance from the rack paddle baffle (15) to the rotation center of the firing handle (12). One of the housing (11) and the rack paddle baffle (15) is provided with a chute, and the other is provided with a slider that is snap-fitted with the chute. One end of the rack paddle baffle (15) away from the firing handle (12) is connected to the housing (11) through an elastic member. When installing the first staple cartridge, under the restriction of the rack paddle baffle (15), the extreme position that the rack paddle (13) can contact is the A tooth (141). When the rack paddle (13) abuts against the A tooth (141), the actuating member (2) is in place and cannot move forward any further. When installing the second staple cartridge, the rack paddle (13) can abut against the B tooth (142). After the rack paddle (13) reaches the end of the stroke of the first staple cartridge, the actuating member (2) can still move forward until it reaches the end of the stroke of the second staple cartridge.

2. The stapler according to claim 1, wherein There is also a C tooth (143) on the rack (14) at the extreme firing position of the third staple cartridge. There is no tooth-shaped structure between the B tooth (142) and the C tooth (143). The length of the second staple cartridge is less than the length of the third staple cartridge.

3. The stapler according to claim 1, wherein One end of the elastic member is fixedly connected to the housing (11), and the other end abuts or is connected to the end face of the rack paddle baffle (15).

4. The stapler according to claim 1, characterized in that, The number of the chutes is two, and the two chutes are perpendicular to the two ends of the rack paddle baffle (15) respectively.

5. The stapler according to any one of claims 2-4, characterized in that, There are several continuous teeth (144) between the firing starting point of the rack (14) and the A tooth (141).

6. The stapler according to claim 5, wherein, The tooth shapes of the continuous teeth (144), the A tooth (141), the B tooth (142), and the C tooth (143) are the same.

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