Electric anastomat with self-discharging function
By incorporating a self-discharge circuit system and switching device into the electric stapler, the safety hazard of residual power after the lithium battery of the electric stapler is solved, achieving safe and low-cost battery disposal with a wide range of applications.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG UNIV
- Filing Date
- 2025-01-17
- Publication Date
- 2026-04-24
AI Technical Summary
Existing electric anastomosis devices have disposable lithium batteries that still have residual power after use. Directly discarding them poses a safety hazard, and the complex self-discharge system increases the failure rate and cost.
Design an electric anastomosis device with self-discharge function. By setting a self-discharge circuit system and switching device in the battery pack, the device ensures that the battery automatically releases the remaining power after use. The device includes multiple batteries, a control board, fixing parts and conductive sheets. The switching device controls the switching of the self-discharge circuit to realize the switching of the battery into three states.
It achieves safe and harmless treatment of lithium batteries in electric anastomosis devices, reduces failure rate and cost, ensures that the battery is completely depleted after disposal, has a simple and reasonable structure, and is widely applicable.
Smart Images
Figure CN224155698U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of anastomosis device technology and relates to a discharge protection device used on electric vehicles. Background Technology
[0002] As a device to replace manual suturing, the stapler works by simultaneously cutting the tissue with a scalpel and suturing it with titanium staples, thus achieving the effect of tissue separation or anastomosis. Staplers are increasingly used in surgery due to their ease of operation, saving surgical time, single-use nature to avoid cross-infection, and effective reduction of surgical complications. Staplers are mainly divided into manual and electric types. Electric staplers require a matching power supply, most commonly a disposable lithium battery. Because lithium batteries are designed with a capacity exceeding clinical requirements, discarded lithium batteries often still contain residual charge after use, posing a significant safety hazard if disposed of directly. Therefore, a method is needed to ensure the safe and harmless disposal of lithium batteries after surgical use. The most direct approach is to incorporate a self-discharge system into the lithium battery, automatically releasing any remaining charge after use, thereby avoiding the safety hazards of discarding a charged battery.
[0003] However, the safety design of the disposable lithium battery in current electric staplers is relatively complex, and the self-discharge system structure is quite complicated. On the one hand, the more complex the mechanism, the higher the failure rate, which will bring greater risks to clinical surgery. On the other hand, the more complex the mechanism, the higher the cost, which will increase the cost of electric staplers. For disposable electric staplers, the increased cost leads to a higher price, which will undoubtedly bring a heavier economic burden to patients.
[0004] To address this issue, an electric stapler with a self-discharge function was designed. Utility Model Content
[0005] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a simple, reasonable, practical, convenient, low-cost, and widely applicable electric stapler with self-discharge function. The electric stapler with self-discharge function designed in this invention ensures that after use, its disposable lithium battery can automatically release any remaining charge through a self-discharge system, allowing for safe and harmless disposal.
[0006] This utility model is achieved through the following technical solution: an electric anastomosis device with self-discharge function, comprising an anastomosis device body, which consists of an operating handle, an end effector, and a slender rod connecting the two. A battery pack and a fixing seat for fixing the battery pack are installed on the operating handle. The fixing seat has a placement cavity, in which the battery pack is installed. Mounting pieces are provided on both sides of the fixing seat, and fixing strips are installed on the mounting pieces. The fixing strips are snapped into the operating handle for installation and fixation. The battery pack consists of multiple batteries, a control board, and fixing components. The multiple batteries are connected in parallel. The control board is installed at the rear, and the fixing components are provided at the front. The multiple batteries are fixed together by the control board and the fixing components. A positioning through hole is provided on the front fixing component, which faces the rear control board.
[0007] Preferably, the control board is equipped with multiple conductive plates, which are connected to multiple batteries. The control board is equipped with a working system and a self-discharge circuit system, which are switched by a switching device. The switching device faces the positioning through hole in front, and a protruding connecting contact head installed at the tail of the operating handle can be inserted into the positioning through hole. The connecting contact head causes the elastic plate to contact the discharge circuit system to start the discharge circuit.
[0008] Preferably, the switching device consists of a metal elastic sheet and a conductive surface. A through hole is provided on the control board, and a metal elastic sheet is installed on one side of the through hole. The lower part of the metal elastic sheet is fixed inside the control board, and an elastic contact body and a snap-fit connector are provided on the upper part. Conductive surfaces are installed on the front and rear sides of the through hole, with the front conductive surface located below the through hole on the side of the contact body and the rear conductive surface located above the through hole. In the normal state, the snap-fit connector is pressed against the upper position of the through hole, and a certain distance is left between the contact body and the front conductive surface. When the connecting contact head is inserted, the snap-fit connector passes through the through hole, and the snap-fit connector snaps onto the rear conductive surface, and the contact body contacts the front conductive surface to open the discharge circuit.
[0009] Preferably, the switching device consists of a metal elastic sheet and a metal contact sheet. The control board has a through hole, and the metal contact sheet is arranged in an L-shape above one side of the through hole. The short side of the L-shaped metal contact sheet is embedded and fixed to the control board above the through hole, while the long side is arranged vertically downwards opposite the short side and directly opposite the through hole. The metal elastic sheet has a Z-shaped structure and is fixed at the bottom to the control board below the through hole on one side of the metal contact sheet. A limit hook is provided at the upper end. The upper part of the metal elastic sheet passes through the through hole so that the limit hook at the upper end abuts against the through hole on the other side of the metal contact sheet. When the connecting contact head is inserted, the limit hook passes through the through hole and contacts the metal contact sheet, turning on the discharge circuit. The limit hook hooks the upper part of the through hole for fixation.
[0010] Preferably, the battery consists of four cells arranged vertically and horizontally.
[0011] The beneficial effects of this utility model are as follows:
[0012] This utility model addresses the safety hazards posed by disposable lithium batteries in electric staplers when they are discarded. It designs an electric stapler with a self-discharge function, which ensures that after the electric stapler is used, the disposable lithium battery can automatically release the remaining charge through a self-discharge system, thus allowing it to be safely and harmlessly disposed of. The overall design has the advantages of simple and reasonable structure, practicality and convenience, low cost, wide applicability, and safety. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention, which is installed behind the operating handle of the anastomosis device.
[0014] Figure 2 This is a schematic diagram of the overall structure of this utility model before or after use, without installation.
[0015] Figure 3 This is a schematic diagram of the overall structure of this utility model.
[0016] Figure 4 This is a schematic diagram of the internal structure of the first type of battery pack of this utility model.
[0017] Figure 5 This is a cross-sectional schematic diagram of the first type of battery pack of this utility model installed in front of the operating handle.
[0018] Figure 6 This is a cross-sectional schematic diagram of the first type of battery pack of this utility model installed behind the operating handle.
[0019] Figure 7 This is a cross-sectional schematic diagram of the first type of battery pack of this utility model after it has been removed from the operating handle.
[0020] Figure 8 This is a schematic diagram of the internal structure of the second type of battery pack of this utility model.
[0021] Figure 9 This is a cross-sectional schematic diagram of the second type of battery pack of this utility model installed in front of the operating handle.
[0022] Figure 10 This is a cross-sectional schematic diagram of the second type of battery pack of this utility model installed behind the operating handle.
[0023] Figure 11 This is a cross-sectional view of the second type of battery pack of this utility model after it has been removed from the operating handle. Detailed Implementation
[0024] To enable those skilled in the art to more clearly understand the purpose, technical solution and advantages of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments.
[0025] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "horizontal", and "vertical" are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0026] The present invention will now be described in detail with reference to the accompanying drawings: Figure 1-3 As shown, an electric stapler with self-discharge function includes a stapler body, which consists of an operating handle 1, an end effector 2, and a slender rod 3 connecting the two. A battery pack 4 and a fixing seat 5 for fixing the battery pack are installed on the operating handle. The fixing seat 5 has a placement cavity 6, in which the battery pack 4 is installed. Mounting pieces 7 are provided on both sides of the fixing seat, and fixing strips 8 are installed on the mounting pieces 7. The fixing strips 8 are snapped into the operating handle 1 for installation and fixation. The battery pack 4 consists of multiple batteries 9, a control board 10, and a fixing member 22. The multiple batteries 9 are connected in parallel. The control board 10 is installed at the rear, and the fixing member 22 is provided at the front. The multiple batteries 9 are fixed together by the control board 10 and the fixing member 22. A positioning through hole 12 is provided on the front fixing member 22, which is directly opposite the rear control board 10.
[0027] The control board 10 is equipped with multiple conductive sheets 11, which are connected to multiple batteries 9. The control board 10 is equipped with a working system and a self-discharge circuit system (not shown in the figure). The two are switched by a switching device. The switching device is facing the positioning through hole 12 in front. A protruding connecting contact 13 installed at the tail of the operating handle 1 can be inserted into the positioning through hole 12. The connecting contact 13 causes the elastic sheet to contact the discharge circuit system to start the discharge circuit.
[0028] like Figure 4-7As shown, the switching device consists of a metal elastic sheet 14 and a conductive surface 15. The control board 10 has a through hole, and a metal elastic sheet 14 is installed on one side of the through hole. The lower part of the metal elastic sheet 14 is fixed inside the control board 10, and an elastic contact body 16 and a snap-fit connector 17 are provided on the upper part. Conductive surfaces 15 are installed on the front and rear sides of the through hole, with the front conductive surface 18 located below the through hole on the side of the contact body 16 and the rear conductive surface 19 located above the through hole. In the normal state, the snap-fit connector 17 is pressed against the upper position of the through hole, and a certain distance is left between the contact body 16 and the front conductive surface 18. When the connecting contact 13 is inserted, the snap-fit connector 17 passes through the through hole, and the snap-fit connector 17 snaps into the rear conductive surface 19. The contact body 16 then contacts the front conductive surface 18 to activate the discharge circuit.
[0029] like Figure 8-11 As shown, the switching device consists of a metal elastic sheet 14 and a metal contact sheet 20. The control board 10 has a through hole. The metal contact sheet 20 is arranged in an L-shape above one side of the through hole. The short side of the L-shaped metal contact sheet 20 is embedded and fixed to the control board 10 above the through hole, while the long side is arranged vertically downwards opposite the short side, directly facing the through hole. The metal elastic sheet 14 has a Z-shaped structure, fixed at its lower end to the control board 10 below the through hole on one side of the metal contact sheet 20. A limiting hook 21 is provided at its upper end. The upper part of the metal elastic sheet 14 passes through the through hole, causing the limiting hook 21 at its upper end to press against the through hole on the other side of the metal contact sheet 20. When the connecting contact head 13 is inserted, the limiting hook 21 passes through the through hole and contacts the metal contact sheet 20, activating the discharge circuit. The limiting hook 21 hooks onto the upper part of the through hole for fixation. The battery 9 has four cells arranged vertically and horizontally.
[0030] The design features of this utility model are as follows:
[0031] The electric stapler of this invention is used to clamp target tissue and perform cutting and suturing in laparoscopic surgery. The battery pack is equipped with a working system and a self-discharge circuit system (both of which are prior art). The working system is used to provide sufficient power for the instrument to work normally. The self-discharge system serves as a safety insurance for the battery pack. When turned on, it keeps the battery pack in a slow self-discharge state, ensuring that the battery pack can consume the remaining power within a certain period of time after it is discarded.
[0032] This invention uses a switching device as a switch for the discharge circuit, which can control the opening and closing of the self-discharge circuit. Whether the self-discharge circuit is open or closed, the battery pack can provide sufficient power to the instrument through the working system, ensuring the instrument can function normally. When the self-discharge circuit is closed, the battery pack will activate its self-discharge function, slowly consuming power.
[0033] The switching device of this utility model has two structures, both of which can realize three states of the battery pack. Specifically: In the first state, before the battery pack is installed on the handle, the switching device keeps the self-discharge circuit in an open state, and the battery pack can only provide power to the instrument for normal operation through the working system; In the second state, after the battery pack is installed on the handle, the switching device is triggered, and the self-discharge circuit is turned on. The battery pack will start its self-discharge function, continuously and slowly consuming power without affecting the working system of the battery pack; In the third state, after the battery pack is removed from the handle, the switching device remains in an triggered state, and the self-discharge circuit is continuously turned on. At this time, the working system is disconnected from the instrument and stops working. The self-discharge circuit slowly consumes the remaining power of the battery pack until the power is exhausted.
[0034] Example 1
[0035] like Figure 4-7 As shown, the battery pack 4 mainly contains multiple batteries 9, conductive sheets 11 connecting the batteries, a control board 10, and a switching device, namely a metal elastic sheet 14 and a conductive surface 15. One end of the metal elastic sheet 14 is fixed to the control board 10 of the battery pack 4, while the other end can deform under external force. The control board 10 has a front conductive surface 18 and a rear conductive surface 19. The self-discharge circuit system is only activated when the metal elastic sheet 14 contacts at least one of the front conductive surface 18 and the rear conductive surface 19. When no external force is applied, the metal elastic sheet 14 deforms towards the center of the two surfaces of the control board due to its own elastic deformation. That is, when the metal elastic sheet 14 is on the left side of the control board, it will deform towards the right side of the control board, and when the metal elastic sheet 14 is on the right side of the control board, it will deform towards the left side of the control board.
[0036] like Figure 5 In the first state of the battery pack 4, that is, before the battery pack 4 is installed on the operating handle 1, the metal elastic sheet 14 is in the first state. Under its own elastic deformation, the metal elastic sheet 14 deforms towards the control board 10 until the metal elastic sheet 14 partially contacts the control board 10 and is restricted in position by the control board 10, but does not contact the front conductive surface 18 of the control board 10, and will not connect the self-discharge circuit system.
[0037] like Figure 6 In the second state of the battery pack 4, that is, after the battery pack 4 is installed in the battery mounting base 5 of the operating handle 1, the metal elastic sheet 14 is in the second state. Under the action of the external force of the battery mounting base 5, the metal elastic sheet 14 deforms towards the control board 10 until the metal elastic sheet 14 partially contacts the rear conductive surface 19 of the control board 10, continuously connecting the self-discharge circuit, and the battery pack 4 slowly consumes power.
[0038] like Figure 7In the third state of battery pack 4, that is, after battery pack 4 is removed from operating handle 1, the metal elastic sheet 14 is in the third state. When the external force from the operating handle disappears, the metal elastic sheet 14 deforms towards the control board 10 under its own elastic deformation until the metal elastic sheet 14 partially contacts the rear conductive surface 19 of the control board 10, continuously connecting the self-discharge circuit, and the battery pack 4 slowly consumes power until the power is exhausted.
[0039] The first, second, and third states of the battery pack 4 correspond to different first, second, and third forms of the metal elastic sheet 14, respectively.
[0040] Example 2
[0041] like Figure 8-11 As shown, the battery pack 4 mainly contains multiple batteries 9, conductive sheets 11 connecting the batteries, a control board 10 controlling the batteries, and switching devices, namely a metal elastic sheet 14 and a metal contact sheet 20. One end of the metal elastic sheet 14 is fixed to the control board 10 of the battery pack 4, while the other end can deform under external force. The metal contact sheet 20 is fixed to the control board 10. The self-discharge circuit system is only activated when the limiting hook 21 of the metal elastic sheet 14 contacts the metal contact sheet 20. When no external force is applied, the metal elastic sheet 14 deforms towards the metal contact sheet 20 under its own elastic deformation, and will pass over the position of the metal contact sheet 20.
[0042] like Figure 9 In the first state of the battery pack 4, that is, before the battery pack 4 is installed on the operating handle 1, the metal elastic sheet 14 is in the first state. Under its own elastic deformation, the metal elastic sheet 14 deforms towards the control board 10 until the metal elastic sheet 14 partially contacts the control board 10, and is restricted in position by the control board 10, so that it does not contact the metal contact piece 20 and will not connect the self-discharge circuit system.
[0043] like Figure 10 In the second state of battery pack 4, that is, after battery pack 4 is installed in the battery mounting base 5 of operating handle 1, the metal elastic sheet 14 is in the second state. Under the action of external force from battery mounting base 5, the metal elastic sheet 14 deforms towards the control board 10 until the metal elastic sheet 14 partially contacts the metal contact piece 20 on the control board 10, continuously connecting the self-discharge circuit system, and the battery pack 4 slowly consumes power.
[0044] like Figure 11In the third state of battery pack 4, that is, after battery pack 4 is removed from operating handle 1, the metal elastic sheet 14 is in the third state. When the external force from operating handle 1 disappears, the metal elastic sheet 14 deforms away from the control board 10 under its own elastic deformation until the metal elastic sheet 14 contacts the rear conductive surface 19 of the control board 10, continuously connecting the self-discharge circuit system, and the battery pack 4 slowly consumes power until the power is exhausted.
[0045] In the first state of the battery pack 4, the corresponding metal elastic sheet 14 has a first shape. The second and third states of the battery pack 4 both correspond to the second shape of the metal elastic sheet 14. The first and second shapes of the metal elastic sheet 14 are different.
[0046] The specific embodiments described herein are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.
Claims
1. An electric stapler with self-discharge function, comprising a stapler body, the body consisting of an operating handle, an end effector, and an elongated rod connecting the two, a battery pack and a mounting base for fixing the battery pack mounted on the operating handle, characterized in that: The mounting base has a placement cavity, in which the battery pack is installed. Mounting plates are provided on both sides of the mounting base, and fixing strips are installed on the mounting plates. The fixing strips are snapped into the operating handle for installation and fixation. The battery pack consists of multiple batteries, a control board, and fixing components. The multiple batteries are connected in parallel. The control board is installed at the rear, and the fixing components are provided at the front. The multiple batteries are fixed together by the control board and the fixing components. A positioning through hole is provided on the front fixing component, which is directly opposite the control board at the rear.
2. The electric stapler with self-discharge function according to claim 1, characterized in that: The control board is equipped with multiple conductive plates, which are connected to multiple batteries. The control board is equipped with a working system and a self-discharge circuit system, which are switched by a switching device. The switching device faces the positioning through hole in front, and a protruding connecting contact head installed at the tail of the operating handle can be inserted into the positioning through hole. The connecting contact head causes the elastic plate to contact the discharge circuit system to start the discharge circuit.
3. The electric stapler with self-discharge function according to claim 2, characterized in that: The switching device consists of a metal elastic sheet and a conductive surface. A through hole is provided on the control board, and a metal elastic sheet is installed on one side of the through hole. The lower part of the metal elastic sheet is fixed inside the control board, and an elastic contact body and a locking connector are provided on the upper part. Conductive surfaces are installed on the front and rear sides of the through hole, with the front conductive surface located below the through hole on the side of the contact body and the rear conductive surface located above the through hole. In the normal state, the locking connector is pressed against the upper position of the through hole, and a certain distance is left between the contact body and the front conductive surface. When the connecting contact is inserted, the locking connector passes through the through hole, the locking connector locks the rear conductive surface, and the contact body contacts the front conductive surface to open the discharge circuit.
4. The electric stapler with self-discharge function according to claim 2, characterized in that: The switching device consists of a metal elastic sheet and a metal contact sheet. The control board has a through hole, and the metal contact sheet is arranged in an L-shape above one side of the through hole. The short side of the L-shaped metal contact sheet is embedded and fixed to the control board above the through hole, while the long side is arranged vertically downwards opposite the short side, directly facing the through hole. The metal elastic sheet has a Z-shaped structure and is fixed to the control board below the through hole on one side of the metal contact sheet. A limit hook is provided at the upper end. The upper part of the metal elastic sheet passes through the through hole, so that the limit hook at the upper end of the sheet rests on the through hole on the other side of the metal contact sheet. When the connecting contact head is inserted, the limit hook passes through the through hole and contacts the metal contact sheet, activating the discharge circuit. The limit hook hooks the upper part of the through hole for fixation.
5. The electric stapler with self-discharge function according to claim 1, characterized in that: The battery consists of four cells, arranged vertically and horizontally.