An electric anastomat

Abstract

The utility model relates to medical instrument technical field provides an electric anastomat, include: first control circuit board, second control circuit board, drive module, rack, firing handle and fuselage casing, the rack includes first side and with first side opposite second side, first side is zigzag, the second side includes along the recessed area of rack length direction extension, the both ends of recessed area are first end face and second end face, second control circuit board is close to the second side of rack, be provided with first limit switch and second limit switch on second control circuit board, just the first limit switch and second limit switch are closely arranged. The electric anastomat of the application can detect the rack position at the same time, is favorable to reduce the rack length, promotes the rack strength, realizes the instrument more miniaturization, compactness, promotes the operation convenience and use stability.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology and relates to an electric stapler. Background Technology

[0002] Electric staplers are indispensable instruments in modern surgery, and they are developing towards being smaller and more precise to fit into narrow surgical spaces and reduce patient trauma.

[0003] In existing technologies, the sensor systems used to detect the firing and retraction positions of a rack often neglect the constraints on instrument miniaturization. For example, some solutions place two sensors far apart in the direction of rack movement to detect the two extreme positions of the rack. This forces the rack to be designed to be longer to have sufficient stroke to trigger the two sensors separately, resulting in an excessively long instrument head. This affects its maneuverability and ease of operation in space-constrained scenarios such as laparoscopic surgery. A longer rack may also reduce its strength, which is detrimental to stable cutting. In addition, a longer rack also increases the internal space occupied by the instrument housing, which is not conducive to achieving a compact instrument design.

[0004] Therefore, there is an urgent need in this field for a technical solution that can simultaneously solve the problems of position detection, improve rack strength and instrument miniaturization, while ensuring reliable and accurate detection of rack position and minimizing the necessary stroke of the rack, thus providing key support for the compact design of electric staplers. Utility Model Content

[0005] The purpose of this invention is to provide an electric stapler that solves the technical problems of position detection, improving rack strength and miniaturization of instruments in the prior art.

[0006] In a first aspect, this utility model provides an electric stapler, comprising: a first control circuit board, a second control circuit board, a drive module, a rack, a firing handle, and a housing; the first control circuit board, the second control circuit board, the drive module, and the rack are located inside the housing, the first control circuit board is located above the inside of the housing, the rack and the second control circuit board are located below the first control circuit board, the drive module drives the rack to move, and a portion of the firing handle is located outside the housing; the rack includes a first side and a second side opposite to the first side, the first side is serrated, and the second side includes a recessed area extending along the length direction of the rack, the two ends of the recessed area being a first end face and a second end face; the second control circuit board is located near the second side of the rack, and a first limit switch and a second limit switch are provided on the second control circuit board, with the first limit switch and the second limit switch being disposed adjacent to each other.

[0007] Furthermore, the first end face includes a first main end face and a first secondary end face, and the second end face includes a second main end face and a second secondary end face.

[0008] Furthermore, two relays are provided on the first control circuit board.

[0009] Furthermore, the two relays are located on the side of the first control circuit board away from the rack.

[0010] Furthermore, the relay is a magnetic latching relay and includes 10 pins.

[0011] Furthermore, the first control circuit board is also provided with a power switch and a firing switch. The power switch is located on the side of the first control circuit board away from the rack, and the firing switch is located on the side of the first control circuit board closer to the rack.

[0012] Furthermore, a speed switch is also provided on the first control circuit board, and the speed switch is located on the side of the first control circuit board near the rack.

[0013] Furthermore, the first control circuit board is also provided with a firing protection switch, which is located on the side of the first control circuit board near the rack.

[0014] Furthermore, it also includes a reset button, which is located on the side of the housing.

[0015] Furthermore, a reset switch is also provided on the second control circuit board. The reset switch is located on the side of the second control circuit board opposite to the side where the first limit switch is located. The reset button is used to trigger the reset switch.

[0016] The embodiments of this utility model have at least the following technical effects: This utility model provides an electric stapler comprising a first control circuit board, a second control circuit board, a drive module, a rack, a firing handle, and a housing. The area and length of the second control circuit board are much smaller than those of the first control circuit board. The two circuit boards are electrically connected, and the second control circuit board is located below the first control circuit board and close to the second side of the rack. Two adjacent mechanical limit switches are provided on the second control circuit board. When the rack is in the initial position, the first limit switch is in contact with the first end face. When forward firing is required, the firing handle is pressed, and the motor in the drive module rotates forward to drive the rack to move forward. The structures that can be touched by the first and second limit switches are located in the recessed area and will not be touched until the second end face contacts the second limit switch, at which point the motor stops, indicating that the firing has reached the top, i.e., the maximum position. During this firing process, the firing handle must be held down continuously. Reaching the top indicates that the cutting is complete. Releasing the firing handle causes the motor to reverse, driving the rack to move backward until the first end face contacts the first limit switch, at which point the motor stops, indicating that the rack has returned to the initial position.

[0017] The two adjacent mechanical limit switches on the second control circuit board minimize the complex adaptation structure on the rack for triggering the switches. Only a recess extending along the length of the rack is needed. When different limit switches are triggered at the two ends of the recess, the rack's position information can be obtained. At the same time, the two adjacent mechanical limit switches also minimize the length required for the recess. The distance between the first and second end faces minus the distance between the triggering structures of the two limit switches is the distance the rack can move. Given the cutting requirements, the smaller the distance between the first and second limit switches, the shorter the length of the recess area, thus minimizing the rack length. This not only allows for rack position detection but also improves rack strength, resulting in a smaller, more compact instrument, and enhanced ease of operation and stability. Attached Figure Description To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 A schematic diagram of an electric stapler provided for an embodiment of this utility model; Figure 2 A partial internal structure diagram of the electric stapler provided in an embodiment of this utility model; Figure 3A schematic diagram showing the relative positional relationship between the control components and the rack of the electric stapler provided in this embodiment of the utility model; Figure 4 A schematic diagram of the control components of the electric stapler provided in the embodiments of this utility model; Figure 5 A schematic diagram of the second side of the rack of the electric stapler provided in this embodiment of the present invention; Figure 6 A schematic diagram of the first side of the rack of the electric stapler provided in an embodiment of this utility model.

[0019] Icons: 1-Jaw assembly; 4-Fire handle; 5-Built housing; 9-Reset button; 21-First control circuit board; 22-Second control circuit board; 31-Drive module; 32-Rack; 61-First limit switch; 62-Second limit switch; 71-First relay; 72-Second relay; 81-Power switch; 82-Fire switch; 83-Speed ​​switch; 84-Fire protection switch; 91-Reset switch; 321-First end face; 322-Second end face; 323-Groove; 3211-First main end face; 3212-First secondary end face; 3221-Second main end face; 3222-Second secondary end face. Detailed Implementation

[0020] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0022] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the term “comprising” as used in this specification means the presence of the stated features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or combinations thereof. The term “and / or” as used herein includes all or any units and all combinations thereof of one or more associated listed items.

[0023] Please see Figures 1 to 4 The electric stapler includes: a jaw assembly 1, a control assembly, a cutting assembly, a firing handle 4, and a housing 5. The jaw assembly 1 is used to clamp tissue, and a portion of the firing handle 4 is located outside the housing 5, used to externally trigger the control assembly, which in turn controls the cutting assembly to cut the tissue. The control components include a first control circuit board 21 and a second control circuit board 22, and the cutting components include a drive module 31, a rack 32, and a cutting blade. The control components, drive module 31, and rack 32 are located inside the housing 5. The first control circuit board 21 is located above the housing 5, and the rack 32 and second control circuit board 22 are located below the first control circuit board 21. The drive module 31 drives the rack 32 to move. The rack 32 includes a first side and a second side opposite to the first side. The first side is serrated for engaging the drive module 31, and the second side includes a recessed area extending along the length of the rack. The two ends of the recessed area are a first end face 321 and a second end face 322. The second control circuit board 22 is located near the second side of the rack 32. A first limit switch 61 and a second limit switch 62 are provided on the second control circuit board 22, and the first limit switch 61 and the second limit switch 62 are arranged adjacent to each other.

[0024] In this embodiment, the electric stapler includes a first control circuit board 21, a second control circuit board 22, a drive module 31, a rack 32, a firing handle 4, and a housing 5. The area and length of the second control circuit board 22 are much smaller than those of the first control circuit board 21. The two circuit boards are electrically connected, and the second control circuit board 22 is located below the first control circuit board 21 and close to the second side of the rack 32. Two adjacent mechanical limit switches are provided on the second control circuit board 22. When the rack is in the initial position, the first limit switch 61 is in contact with the first end face 321. When forward firing is required, the firing handle is pressed. The motor in the drive module 31 drives the rack 32 forward by rotating the handle 4. The structures that can be touched by the first limit switch 61 and the second limit switch 62 are located in the recessed area and will not be touched until the second end face 322 contacts the second limit switch 62. The motor stops, which means that the firing has reached the top, that is, the firing has reached the maximum position. During this firing process, the firing handle 4 needs to be pressed continuously. Reaching the top means that the cutting is completed. Release the firing handle 4. At this time, the motor will reverse and drive the rack 32 to move backward until the first end face 321 contacts the first limit switch 61. The motor stops, which means that the rack has returned to the initial position.

[0025] The two adjacent mechanical limit switches on the second control circuit board 22 can minimize the complex adaptation structure on the rack for triggering the switches. Only a recess extending along the length direction is needed on the rack. When the two ends of the recess trigger different limit switches, the position information of the rack can be obtained. At the same time, the two adjacent mechanical limit switches can also minimize the length required for the recess. The distance between the first end face 321 and the second end face 322 minus the distance between the triggering structures of the two limit switches is the distance that the rack can move. When the cutting requirements are clear, the smaller the distance between the first limit switch 61 and the second limit switch 62, the shorter the length of the recess area can be, thereby minimizing the length of the rack. While being able to detect the rack position, it is beneficial to improve the rack strength, making the instrument more miniaturized and compact, and improving the ease of operation and stability of use.

[0026] Optional, please continue reading Figure 5The first end face 321 includes a first main end face 3211 and a first secondary end face 3212, and the second end face 322 includes a second main end face 3221 and a second secondary end face 3222. In this embodiment, the first main end face 3211 and the second main end face 3221 are mainly used to trigger the first limit switch 61 and the second limit switch 62. The first secondary end face 3212 is used to protect the first limit switch 61 from impact damage after the first main end face 3211 contacts the first limit switch 61. The second secondary end face 3222 is used to protect the second limit switch 62 from impact damage when the second main end face 3221 contacts the second limit switch 62. The first limit switch 61 and the second limit switch 62 are small in size, and a large impact force may cause damage to the switches. Therefore, the presence of the first secondary end face 3212 and the second secondary end face 3222 allows the force acting on the switches to transition smoothly, thus playing a protective role.

[0027] Optionally, two relays are provided on the first control circuit board 21. In this embodiment, the first control circuit board 21 controls the operation of the motor in the drive module 31 through the first relay 71, the second relay 72, and the control circuit provided thereon. The first control circuit board 21 and the second control circuit board 22 are electrically connected. The first limit switch 61 and the second limit switch 62 are only electrically connected to the second relay 72. The second relay 72 controls the first relay 71. One terminal of the motor is electrically connected to the first relay 71, and the other terminal of the motor is electrically connected to both the first relay 71 and the second relay 72. The rotation direction of the motor is jointly controlled by the second relay 72 and the first relay 71. Both the first relay 71 and the second relay 72 are 10-pin magnetic latching relays, which, in conjunction with the switches and the control circuit, achieve state control of the rack 32.

[0028] Optionally, the two relays are positioned on the side of the first control circuit board away from the rack. This allows space for the rack to move and reduces interference during its movement.

[0029] Optionally, the first control circuit board 21 is also provided with a power switch 81 and a firing switch 82. The power switch 81 is located on the side of the first control circuit board 21 away from the rack 32, and the firing switch 82 is located on the side of the first control circuit board 21 closer to the rack 32. In this embodiment, the power switch 81 being triggered indicates that the device is powered. When the rack is in its original state, the first limit switch 61 is in the triggered state, and the second limit switch 62 is in the untriggered state. Based on this, when cutting is required, the firing switch 82 is continuously triggered by the firing handle 4, the motor rotates forward, and the rack 32 moves forward. When the rack is fired to the top, the second limit switch 62 is triggered, and the first relay 71 is controlled by the second relay 72, and the motor stops. After the firing handle 4 is released, the firing switch 82 is in the untriggered state. At this time, the second limit switch 62 is still in the triggered state, and the control circuit controls the motor to reverse, and the rack begins to automatically retract. Until the first limit switch 61 is triggered, the first relay 71 is controlled by the second relay 72, the motor stops, and the rack returns to its original position.

[0030] Optionally, a speed switch 83 is also provided on the first control circuit board 21, and the speed switch 83 is located on the side of the first control circuit board 21 near the rack 32. In this embodiment, please continue to refer to... Figure 6 The speed switch 83 needs to engage with the groove 323 on the first side of the rack 32. One end of the speed switch 83 is electrically connected to both the first relay 71 and the firing switch 82, and the other end is electrically connected to both the first relay 71 and the second relay 72. In the original state, the lever of the speed switch 83 is located in the groove and is not triggered. The motor rotates forward, driving the rack 32 to move forward. The lever of the speed switch 83 disengages from the groove 323, and the speed switch 83 is triggered. At this time, the control circuit on the first control circuit board 21 will control the motor to accelerate, so that the cutter quickly cuts the tissue. However, if the firing handle 4 is released during the acceleration process, the motor will stop immediately.

[0031] Optionally, a firing protection switch 84 is also provided on the first control circuit board 21, and the firing protection switch 84 is located on the side of the first control circuit board 21 near the rack 32. In this embodiment, the firing protection switch 84 is used to cooperate with the jaw assembly 1 to prevent secondary firing when the jaw assembly 1 is closed. If the jaw assembly 1 is not opened after a first cut, then firing cannot be performed for a second cut, thus improving safety.

[0032] Optionally, a reset button 9 is also included on the side of the housing 5. A reset switch 91 is also provided on the second control circuit board 22, located on the side opposite to the side where the first limit switch 61 is located. The reset button 9 triggers the reset switch 91. In this embodiment, if it is necessary to return to the initial position during firing, the firing handle 4 should be released first, the motor should stop, and then the reset button 9 should be pressed. The reset button 9 triggers the reset switch 91, which is electrically connected only to the second relay 72. At this time, both the first limit switch 61 and the second limit switch 62 are in an untriggered state. The motor then reverses, driving the rack 32 to retract until the first limit switch 61 is triggered, stopping the rotation and returning to the original position.

[0033] Those skilled in the art will understand that the steps, measures, and schemes in the various operations, methods, and processes discussed in this utility model can be alternated, modified, combined, or deleted. Furthermore, other steps, measures, and schemes in the various operations, methods, and processes discussed in this utility model can also be alternated, modified, rearranged, decomposed, combined, or deleted. Furthermore, the steps, measures, and schemes in the prior art that are similar to those disclosed in this utility model can also be alternated, modified, rearranged, decomposed, combined, or deleted.

[0034] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", 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 utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0038] It should be understood that although the steps in the flowcharts of the accompanying figures are shown sequentially as indicated by the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the accompanying figures may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the sub-steps or stages of other steps.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An electric stapler, characterized in that, include: First control circuit board, second control circuit board, drive module, rack, firing handle and fuselage housing; The first control circuit board, the second control circuit board, the drive module, and the rack are located inside the fuselage housing. The first control circuit board is located above the fuselage housing, and the rack and the second control circuit board are located below the first control circuit board. The drive module drives the rack to move, and part of the firing handle is located outside the fuselage housing. The rack includes a first side and a second side opposite to the first side. The first side is serrated, and the second side includes a recessed area extending along the length direction of the rack. The two ends of the recessed area are a first end face and a second end face. The second control circuit board is located on the second side of the rack. A first limit switch and a second limit switch are provided on the second control circuit board, and the first limit switch and the second limit switch are arranged adjacent to each other.

2. The electric stapler according to claim 1, characterized in that, The first end face includes a first main end face and a first secondary end face, and the second end face includes a second main end face and a second secondary end face.

3. The electric stapler according to claim 1, characterized in that, The first control circuit board has two relays.

4. The electric stapler according to claim 3, characterized in that, The two relays are located on the side of the first control circuit board away from the rack.

5. The electric stapler according to claim 3, characterized in that, The relay is a magnetic latching relay and includes 10 pins.

6. The electric stapler according to claim 3, characterized in that, The first control circuit board is also provided with a power switch and a firing switch. The power switch is located on the side of the first control circuit board away from the rack, and the firing switch is located on the side of the first control circuit board closer to the rack.

7. The electric stapler according to claim 6, characterized in that, The first control circuit board is also provided with a speed switch, which is located on the side of the first control circuit board near the rack.

8. The electric stapler according to claim 6, characterized in that, The first control circuit board is also provided with a firing protection switch, which is located on the side of the first control circuit board near the rack.

9. The electric stapler according to claim 1, characterized in that, It includes a reset button, which is located on the side of the housing.

10. The electric stapler according to claim 9, characterized in that, The second control circuit board is also provided with a reset switch, which is located on the side of the second control circuit board opposite to the side where the first limit switch is located. The reset button is used to trigger the reset switch.

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