Motorized stapling device

Abstract

A motor-driven stapling device, characterized in that it comprises: a first control board, a second control board, a drive module, a rack, a release handle and a housing body; wherein the first control board, the second control board, the drive module and the The rack is located inside the housing body, with the first control board located above it inside the housing body, the rack and the second control board located below the first control board, the drive module driving the rack to move it, with part of the release handle located outside the housing body; wherein the rack comprises a first side and a second side opposite the first side, wherein the first side is toothed, wherein the second side comprises a recessed area extending along the longitudinal direction of the rack, wherein the two ends of the recessed area are a first end face and a second end face; wherein the second control board is arranged near the second side of the rack, wherein a first limit switch and a second limit switch are arranged on the second control board, and wherein the first limit switch and the second limit switch are arranged immediately adjacent to each other.

Description

Technical field

[0001] The utility model relates to a motor-driven stapling device in the field of medical devices. Technical background

[0002] Motorized stapling devices are indispensable instruments in modern surgery and are evolving towards smaller and finer designs to fit into tight operating spaces and reduce trauma for the patient.

[0003] In the prior art, the arrangement of sensor systems for detecting the release and retraction positions of the rack often neglects their limitations on device miniaturization. For example, some solutions for detecting the two extreme positions of the rack position two sensors widely spaced in the direction of rack movement. This necessitates a longer rack design to provide sufficient stroke to trigger both sensors. This results in an excessively long device head, compromising its maneuverability and ease of use in spatially confined scenarios such as laparoscopic surgery. A longer rack can also lead to reduced rack rigidity, which is detrimental to stable cutting.Furthermore, a longer rack also increases the space required inside the housing of the device, which is detrimental to a compact design of the device.

[0004] Therefore, in this field there is an urgent need for a technical solution that can simultaneously solve the problems of position detection, increasing rack strength and miniaturizing the device by ensuring reliable and accurate detection of the rack position while minimizing the required rack stroke to provide crucial support for the compact design of motor-driven stapling devices. Subject of the present utility model

[0005] The purpose of the utility model is to provide a motor-driven stapling device that solves the technical problems existing in the prior art where position detection, increasing rack strength and miniaturization of the device are difficult to achieve simultaneously.

[0006] A first aspect of an embodiment of the utility model provides a motor-driven stapling device comprising: a first control board, a second control board, a drive module, a rack, a release handle, and a housing body; wherein the first control board, the second control board, the drive module, and the rack are located inside the housing body, the first control board being located above inside the housing body, the rack and the second control board being located below the first control board, the drive module driving the rack to move it, and part of the release handle being located outside the housing body;wherein the rack comprises a first side and a second side opposite the first side, the first side being toothed, the second side comprising a recessed area extending along the longitudinal direction of the rack, the two ends of the recessed area being a first end face and a second end face; wherein the second control board is arranged near the second side of the rack, wherein a first limit switch and a second limit switch are arranged on the second control board, and wherein the first limit switch and the second limit switch are arranged immediately adjacent to each other.

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

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

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

[0010] Furthermore, the relays are bistable relays and include 10 connections.

[0011] Furthermore, a power switch and a release switch are arranged on the first control board, the power switch being located on a side of the first control board facing away from the rack, and the release switch being located on a side of the first control board facing the rack.

[0012] Furthermore, a variator switch is arranged on the first control board, wherein the variator switch is arranged on a side of the first control board facing the rack.

[0013] Furthermore, a trip protection switch is arranged on the first control board, wherein the trip protection switch is arranged on a side of the first control board facing the rack.

[0014] Furthermore, it includes a reset button, the reset button being located on the side of the housing body.

[0015] Furthermore, a reset switch is arranged on the second control board, wherein the reset switch on the second control board is located on a side opposite the side on which the first limit switch is located, wherein the reset button serves to trigger the reset switch.

[0016] The embodiments of the utility model exhibit at least the following technical effects: The motor-driven stapling device provided in the embodiments of the utility model comprises a first control board, a second control board, a drive module, a rack, a release handle, and a housing. The area and length of the second control board are significantly smaller than those of the first control board. Both boards are electrically connected, and the second control board is located below the first control board, near the second side of the rack. Two adjacent mechanical limit switches are arranged on the second control board. When the rack is in its home position, the first limit switch contacts the first end face. To initiate a forward release, the release handle is pressed. The motor in the drive module rotates forward and drives the rack forward.The mechanisms that actuate the first and second limit switches are located in the recessed area and remain untouched until the second end face contacts the second limit switch. The motor stops, indicating that the end of the release cycle, or the maximum release position, has been reached. During this release cycle, the release handle must be held continuously; reaching the end of the release cycle signals the completion of the cut. Upon releasing the release handle, the motor reverses its direction of rotation and drives the rack backward until the first end face contacts the first limit switch. The motor stops, indicating that the retraction cycle is complete and the rack has returned to its starting position.

[0017] The two immediately adjacent mechanical limit switches on the second control board can minimize the complex adaptation structure on the rack for triggering the switches. Only a longitudinal recess needs to be provided on the rack. If the two ends of the recess trigger different limit switches, the rack's position information can be acquired; simultaneously, the two immediately adjacent mechanical limit switches also keep the required recess length to a minimum. The distance between the first end face and the second end face, minus the distance between the trigger structures of the two limit switches, is the path the rack can travel.Provided that cutting requirements are clearly defined, the following applies: the smaller the distance between the first and second limit switches, the shorter the length of the recessed area can be, thus reducing the length of the rack as much as possible. This is advantageous for increasing the strength of the rack, achieving greater miniaturization and compactness of the device, and improving ease of use and stability, while simultaneously allowing the position of the rack to be detected. Description of the drawings

[0018] To clarify the technical solutions in the specific embodiments of the utility model or in the prior art, the drawings that must be used in the description of the specific embodiments or the prior art are briefly presented below. It is obvious that the drawings in the following description represent only some embodiments of the utility model, and a person skilled in the art can derive other drawings from these without any creative effort. Fig. Figure 1 is a schematic representation of a motor-driven stapling device according to an embodiment of the utility model; Fig. Figure 2 is a schematic representation of part of the internal structure of the motor-driven stapling device according to an embodiment of the utility model; Fig. Figure 3 is a schematic representation of the relative position of the control arrangement and the rack of the motor-driven stapling device according to an embodiment of the utility model; Fig. Figure 4 is a schematic representation of the control arrangement of the motor-driven stapling device according to an embodiment of the utility model; Fig. Figure 5 is a schematic representation of the second side of the rack of the motor-driven stapling device according to an embodiment of the utility model; Fig. Figure 6 is a schematic representation of the first side of the rack of the motor-driven stapling device according to an embodiment of the utility model.

[0019] Symbols: 1-Jaw assembly; 4-Release handle; 5-Housing body; 9-Reset button; 21-First control board; 22-Second control board; 31-Drive module; 32-Rack; 61-First limit switch; 62-Second limit switch; 71-First relay; 72-Second relay; 81-Power switch; 82-Release switch; 83-Speed ​​switch; 84-Trip 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 description of the embodiments

[0020] The technical solutions of the utility model, in conjunction with the exemplary embodiments, are presented clearly and completely below. It is evident that the described exemplary embodiments represent only a portion and not all of the exemplary embodiments of the utility model. Based on the exemplary embodiments of this utility model, all other exemplary embodiments derived by a person skilled in the art in this field without any creative activity fall within the scope of protection of this utility model.

[0021] A person skilled in this field may understand that all terms used herein (including technical and scientific terms), unless otherwise defined, have the same meaning as in the general understanding of a person skilled in this field. It should further be understood that terms as defined in general dictionaries are to be interpreted as having a meaning in accordance with the context of the prior art and not in an idealized or overly formal sense, unless expressly defined herein.

[0022] A person skilled in the art in this field will understand that the singular forms "a", "an", "the", and "this" used here, unless expressly stated otherwise, can also be understood to refer to the plural. It should further be understood that the term "includes" used in the description of this utility model indicates the presence of the aforementioned 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" used here includes one, several, or all of the listed elements, as well as all possible combinations thereof.

[0023] As in the Fig. As shown in Figures 1 to 4, the motor-driven stapling device comprises the jaw assembly 1, the control assembly, the cutting assembly, the release handle 4, and the housing 5. The jaw assembly 1 serves to grip fabric. Part of the release handle 4 is located outside the housing 5 and enables external actuation of the control assembly, which in turn controls the cutting assembly to cut the fabric. The control assembly comprises a first control board 21 and a second control board 22, and the cutting assembly comprises a drive module 31, a rack 32, and a cutting blade element. The control assembly, the drive module 31, and the rack 32 are located within the housing 5, with the first control board 21 positioned above and the rack 32 and the second control board 22 positioned below the first control board 21. The drive module 31 drives the rack 32 for movement.The rack 32 has a first side and a second side opposite the first. The first side is toothed to engage with the drive module 31, and the second side has a recessed area extending along the length of the rack, the ends of which form the first end face 321 and the second end face 322. The second control board 22 is located near the second side of the rack and carries a first limit switch 61 and a second limit switch 62, which are arranged immediately adjacent to each other.

[0024] In this embodiment, the motor-driven stapling device comprises a first control board 21, a second control board 22, a drive module 31, a rack 32, a release handle 4, and a housing 5. The area and length of the second control board 22 are significantly smaller than those of the first control board 21. The two boards are electrically connected, with the second control board 22 located below the first control board 21 and near the second side of the rack 32. Two adjacent mechanical limit switches are arranged on the second control board 22. When the rack is in its starting position, the first limit switch 61 contacts the first end face 321. For forward release, the release handle 4 is pressed, the motor in the drive module 31 rotates forward, and drives the rack 32 forward.The actuating mechanisms of the first and second limit switches 61, 62 are located in the recessed area and are not triggered until the second end face 322 makes contact with the second limit switch 62. The motor stops when the maximum trigger position is reached. During this triggering process, the trigger handle 4 must be continuously held down; reaching the maximum trigger position indicates the end of the cut. When the trigger handle 4 is released, the motor reverses its direction of rotation and drives the rack 32 backward until the first end face 321 contacts the first limit switch 61 and the rack returns to its starting position.

[0025] The two immediately adjacent mechanical limit switches on the second control board 22 can minimize the complex adaptation structure on the rack for triggering the switches. Only a recess extending along the longitudinal direction needs to be provided on the rack. If the two ends of the recess trigger different limit switches, the position information of the rack can be acquired; simultaneously, the two immediately adjacent mechanical limit switches also minimize the required length of the recess. The distance between the first end face 321 and the second end face 322, minus the distance between the trigger structures of the two limit switches, is the path the rack can travel.Provided that the cutting requirements are clearly defined, the following applies: The smaller the distance between the first limit switch 61 and the second limit switch 62, the shorter the length of the recessed area can be, thus reducing the length of the rack as much as possible. This is advantageous for increasing the strength of the rack, achieving greater miniaturization and compactness of the device, and improving ease of use and stability, while simultaneously allowing the position of the rack to be detected.

[0026] Optional, please continue to refer to Fig. 5. The first end face 321 comprises a first main end face 3211 and a first secondary end face 3212, and the second end face 322 comprises 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 primarily serve to trigger the first limit switch 61 and the second limit switch 62. The first secondary end face 3212 protects the first limit switch 61 from impact damage after the first main end face 3211 comes into contact with it. The second secondary end face 3222 protects the second limit switch 62 from impact damage when the second main end face 3221 comes into contact with it. Since the first limit switch 61 and the second limit switch 62 are small, excessive impact force can cause damage.Therefore, the first secondary end face 3212 and the second secondary end face 3222 transmit the force acting on the switches evenly and protect them.

[0027] Optionally, two relays are arranged on the first control board 21. In this embodiment, the first control board 21 controls the operation of the motor in the drive module 31 via the first relay 71, the second relay 72, and the control circuit arranged on it. The first control board 21 is electrically connected to the second control board 22. The first limit switch 61 and the second limit switch 62 are connected exclusively to the second relay 72, which controls the first relay 71. One terminal of the motor is connected to the first relay 71, and the other terminal is connected to both the first relay 71 and the second relay 72. The direction of rotation 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 bistable relays with 10 terminals, which, in conjunction with the switches and the control circuit, control the state of the rack 32.

[0028] Optionally, the two relays are located on the side of the first control board facing away from the rack. This creates space for the rack's movement and reduces interference during rack movement.

[0029] Optionally, a power switch 81 and a release switch 82 are arranged on the first control board 21. The power switch 81 is located on the side of the first control board 21 facing away from the rack 32, and the release switch 82 is located on the side facing the rack 32. In this embodiment, actuating the power switch 81 means that the device is supplied with power. When the rack 32 is in its initial position, the first limit switch 61 is triggered, while the second limit switch 62 is not triggered. When a cut needs to be made, the release handle 4 continuously actuates the release switch 82, causing the motor to rotate forward and move the rack 32 forward. Once the end of the travel is reached, the second limit switch 62 is triggered, which, via the second relay 72, controls the first relay 71, and the motor stops.After releasing the release handle 4, the release switch 82 is in the unactivated state, while the second limit switch 62 remains activated. The control circuit causes the motor to rotate in reverse, and the rack automatically retracts until the first limit switch 61 is triggered. The second relay 72 then controls the first relay 71, the motor stops, and the rack returns to its starting position.

[0030] Optionally, a speed switch 83 is also arranged on the first control board 21. The speed switch 83 is located on the side of the first control board 21 that faces the rack 32. In this embodiment, as shown in Fig.As shown in Figure 6, the speed switch 83 must interact 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 release switch 82. The other end is electrically connected to both the first relay 71 and the second relay 72. In the initial state, the lever of the speed switch 83 is in the groove and is not triggered. The motor rotates forward, driving the rack 32. When the lever of the speed switch 83 leaves the groove 323, the speed switch 83 is triggered. At this point, the control circuit on the first control board 21 controls the motor to accelerate, causing the cutting blade to cut the fabric at high speed. If the release handle 4 is released during acceleration, the motor stops immediately.

[0031] Optionally, a trip protection switch 84 is arranged on the first control board 21. The trip protection switch 84 is located on the side of the first control board 21 facing the rack 32. In this embodiment, the trip protection switch 84 serves to cooperate with the jaw assembly 1 to prevent a second tripping while the jaw assembly 1 is closed. If the jaw assembly 1 is not opened after completion of a cutting operation, a second cutting operation cannot be triggered, thus increasing safety.

[0032] Optionally, a reset button 9 is also arranged on the side of the housing body 5. A reset switch 91 is arranged on the second control board 22. The reset switch 91 is located on the side of the second control board 22 opposite the first limit switches 61. The reset button 9 triggers the reset switch 91. In this embodiment, if a return to the initial position is required during the triggering process, the release handle 4 should first be released so that the motor stops. Then, the reset button 9 is pressed, which triggers the reset switch 91. The reset switch 91 is electrically connected only to the second relay 72, and both the first limit switch 61 and the second limit switch 62 are in the untriggered state at this time.The motor then rotates in the opposite direction and drives the rack 32 back until the first limit switch 61 is triggered, which stops the motor and returns the rack to its starting position.

[0033] A person skilled in the art in this field can understand that steps, measures, or processes associated with the operations, methods, or procedures already described in this utility model can be exchanged, modified, combined, or deleted. Furthermore, other steps, measures, or processes associated with the operations, methods, or procedures already described in this utility model can be exchanged, modified, rearranged, disassembled, combined, or deleted. Additionally, steps, measures, or processes of the prior art that correspond to the operations, methods, or processes disclosed in this utility model can be exchanged, modified, rearranged, disassembled, combined, or deleted.

[0034] In the description of this utility model, terms such as "middle," "top," "bottom," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," and "outside," which indicate directions or positional relationships, are based on the directions or positional relationships shown in the drawings and serve only to simplify the description of this utility model. They do not indicate or imply that the designated device or element must be constructed or operated in a particular orientation and are therefore not to be understood as a limitation of this utility model.

[0035] The terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating relative importance or as an implicit indication of the number of technical features in question. Thus, a feature designated as "first" or "second" may explicitly or implicitly comprise one or more of these features. In the description of this utility model, "several" means two or more, unless expressly defined otherwise.

[0036] In the description of this utility model, it should be noted that the terms "mounted," "connected," and "coupled" are to be interpreted broadly unless expressly stated and defined otherwise. They can, for example, refer to a permanent connection, a detachable connection, or an integral connection; they can be connected directly or indirectly via an intermediate medium, or they can be an internal connection between two elements. The specific meaning of the aforementioned terms in this utility model can be understood by a person skilled in the art in this field within the relevant context.

[0037] The description may combine specific features, structures, materials or properties in a suitable manner in one or more embodiments or examples.

[0038] It should be understood that, although the individual steps in the flowchart shown in the drawings are displayed sequentially according to the direction of the arrows, these steps do not necessarily have to be carried out in the order indicated by the arrows. Unless expressly stated otherwise herein, there is no fixed order restriction on the execution of these steps, and they may be carried out in any order.Furthermore, at least some steps in the flowchart shown in the drawings may comprise several sub-steps or several phases, whereby these sub-steps or phases do not necessarily have to be completed at the same time, but can be carried out at different times, and their execution order does not necessarily have to be sequential, but can be carried out periodically or alternately with other steps or at least a part of the sub-steps or phases of other steps.

[0039] Finally, it should be noted that the embodiments described above serve only to illustrate the technical teaching of this utility model and do not limit it. Although this utility model has been explained in detail with reference to the embodiments described above, a person skilled in the art should understand that they may further modify the technical teaching described in the embodiments or replace individual or all of the technical features with technical equivalents without the technical teaching falling outside the scope of protection of the present embodiments.

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