Manual rollback mechanism and anastomat

Abstract

The utility model discloses a manual rollback mechanism and an anastomat, and belongs to the field of medical instruments, the anastomat comprises a casing, a driving motor and a driving gear, the driving gear is connected with an output shaft of the driving motor, the manual rollback mechanism comprises a driving rack, a transmission assembly, a manual rollback assembly and a manual driving assembly, the transmission assembly comprises a rotating shaft and an intermediate gear, the intermediate gear is mounted on the rotating shaft and meshed with the driving rack, the manual rollback assembly comprises a rollback rack and a shifting piece, the rollback rack is slidably connected into the machine shell, one end of the shifting piece extends into the machine shell to be connected with the rollback rack, and the other end of the shifting piece is connected with the driving rack. The manual driving assembly is used for driving the rotating shaft to move so that the intermediate gear can be meshed with one of the driving gear and the back-off rack. According to the manual rollback mechanism and the anastomat, manual rollback can be carried out when the electric rollback function fails, the manual rollback efficiency is high, and the use safety of the anastomat can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a manual retraction mechanism and an anastomosis device. Background Art

[0002] The electric stapler mainly cuts and sutures tissues through the closing, opening, cutting, and retraction functions of the stapler magazine; whether the retraction function of the stapler magazine is normal or not will affect whether the stapler magazine can be opened and closed again after cutting and suturing and then removed from the patient's body. Some electric staplers have a manual retraction function. When the electric retraction function fails, manual retraction can be achieved through a manual retraction mechanism, which can improve the reliability of the electric stapler. The patent text with application number 202111371320.4 discloses an electric stapler with a manual reset mechanism, including a driving mechanism, a transmission gear and a movable shaft. The transmission gear is provided with a threaded portion, and the transmission gear is provided with a threaded hole. After lifting the movable shaft, the threaded portion is extended into the threaded hole, and then the movable shaft is rotated so that the threaded portion is screwed into the threaded hole, driving the transmission gear to disengage from the driving mechanism. The movable shaft needs to rotate many times to disengage the transmission gear from the driving mechanism. The operation is relatively complicated and the manual retraction efficiency is low. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a manual retraction mechanism and anastomosis device to solve the problem.

[0004] According to a manual retraction mechanism of an embodiment of the utility model, the stapler includes a housing, a drive motor and a drive gear, the drive motor is installed in the housing, the drive gear is connected to the output shaft of the drive motor, and the manual retraction mechanism includes:

[0005] A driving rack is slidably connected in the housing, and the driving rack is used to move back and forth to transmit power to drive the stapler to work;

[0006] A transmission assembly, comprising a rotating shaft and an intermediate gear, wherein the rotating shaft is mounted on the housing, the intermediate gear is mounted on the rotating shaft, and the intermediate gear is meshed with the driving rack;

[0007] A manual retraction assembly comprises a retraction rack and a toggle member, wherein the retraction rack is slidably connected in the housing, and one end of the toggle member extends into the housing and is connected to the retraction rack;

[0008] A manual drive assembly is connected to the rotating shaft, and is used to drive the rotating shaft to move along the axial direction of the rotating shaft so that the intermediate gear is meshed with one of the driving gear and the retracting rack.

[0009] A manual retraction mechanism according to an embodiment of the utility model has at least the following beneficial effects:

[0010] When the electric retraction function fails, operate the manual drive assembly to drive the intermediate gear to be offset from the drive gear and engage with the retraction rack, push the toggle piece, drive the retraction rack to move, drive the intermediate gear to rotate, drive the drive rack to move, and realize manual retraction. The operation is convenient and the manual retraction efficiency is high. It can minimize the damage caused by medical accidents and improve the safety of the use of the stapler.

[0011] According to some embodiments of the utility model, a spring is sleeved on the rotating shaft, one end of the spring abuts against the intermediate gear, and the other end of the spring abuts against the inner wall of the casing, and the spring is used to push the intermediate gear to engage with the driving gear.

[0012] According to some embodiments of the utility model, a first washer and a second washer are sleeved on the rotating shaft, the first washer is located between the intermediate gear and the spring, and the second washer is located between the spring and the inner wall of the casing.

[0013] According to some embodiments of the utility model, one end of the rotating shaft is exposed from the housing, and the portion of the rotating shaft exposed from the housing is provided with a shifting shaft protruding along the radial direction of the rotating shaft;

[0014] The manual drive assembly includes a shift block, which is installed on the outside of the casing. The shift block is rotatably connected to the rotating shaft through the shift shaft. The distance from the shift shaft to the end of the shift block is greater than the distance from the shift shaft to the side of the shift block. The shift block is used to drive the rotating shaft to move axially along the rotating shaft when rotating so that the intermediate gear is engaged with one of the driving gear and the retracting rack.

[0015] According to some embodiments of the utility model, the shift block is operably switched to a first position or a second position. When the shift block is in the first position, the side of the shift block abuts against the casing, the intermediate gear is staggered with the retracting rack, and the intermediate gear is meshed with the driving gear and the driving rack; when the shift block is in the second position, the end of the shift block abuts against the casing, the intermediate gear is staggered with the driving gear, and the intermediate gear is meshed with the retracting rack and the driving rack.

[0016] According to some embodiments of the present invention, when the shift block is located at the first position, the length direction of the shift block is perpendicular to the axial direction of the rotating shaft; when the shift block is located at the second position, the length direction of the shift block is parallel to the axial direction of the rotating shaft.

[0017] According to some embodiments of the utility model, a third washer is sleeved on the rotating shaft, the third washer is located outside the housing, and the shift block abuts against the third washer.

[0018] According to some embodiments of the utility model, the shift block is arranged flatly at one end away from the shift shaft, and the shift block is arranged with a rounded corner at one end close to the shift shaft and close to one side of the housing.

[0019] According to some embodiments of the present invention, in the axial direction of the rotating shaft, the driving rack is located between the driving gear and the retracting rack.

[0020] A stapler according to an embodiment of the utility model comprises:

[0021] chassis;

[0022] A driving motor is installed in the casing;

[0023] A driving gear connected to an output end of the driving motor;

[0024] The manual retraction mechanism is installed on the casing.

[0025] A stapler according to an embodiment of the utility model has at least the following beneficial effects:

[0026] When the electric retraction function fails, operate the manual drive assembly to drive the intermediate gear to be offset from the drive gear and engage with the retraction rack, push the toggle piece, drive the retraction rack to move, drive the intermediate gear to rotate, drive the drive rack to move, and realize manual retraction. The operation is convenient and the manual retraction efficiency is high. It can minimize the damage caused by medical accidents and improve the safety of the use of the stapler.

[0027] Additional aspects and advantages of the present invention will be partially presented in the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0029] Figure 1 This is a structural schematic diagram of a manual retraction mechanism according to an embodiment of the utility model;

[0030] Figure 2 It is a structural schematic diagram of a manual retraction mechanism according to an embodiment of the utility model when a shift block is located at a first position;

[0031] Figure 3 It is a structural schematic diagram of a manual retraction mechanism according to an embodiment of the utility model when a shift block is located at a second position;

[0032] Figure 4 The figure is a schematic structural diagram of a stapler according to an embodiment of the utility model.

[0033] Figure Number:

[0034] 100, housing;

[0035] 200, driving motor; 210, driving gear;

[0036] 300, driving rack;

[0037] 400, transmission assembly; 410, rotating shaft; 411, spring; 412, shifting shaft; 413, second washer; 414, third washer; 420, intermediate gear;

[0038] 500, manual retraction assembly; 510, retraction rack; 520, toggle member;

[0039] 600, manual drive assembly; 610, shift block. DETAILED DESCRIPTION

[0040] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0041] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] See also Figure 1 , Figure 2 and Figure 4 A manual retraction mechanism and anastomosis device according to an embodiment of the utility model, the anastomosis device comprises a housing 100, a driving motor 200 and a driving gear 210, the driving motor 200 is installed in the housing 100, and the driving gear 210 is connected to the output shaft of the driving motor 200. The manual retraction mechanism comprises a driving rack 300, a transmission assembly 400, a manual retraction assembly 500 and a manual driving assembly 600. The driving rack 300 is slidably connected in the housing 100, and the driving rack 300 is used to move back and forth to transmit power to drive the anastomosis device to work. The transmission assembly 400 comprises a rotating shaft 410 and an intermediate gear 420, the rotating shaft 410 is installed on the housing 100, the intermediate gear 420 is installed on the rotating shaft 410, and the intermediate gear 420 is meshed with the driving rack 300. The manual retraction assembly 500 includes a retraction rack 510 and a toggle member 520. The retraction rack 510 is slidably connected in the housing 100, and one end of the toggle member 520 extends into the housing 100 and is connected to the retraction rack 510. The manual driving assembly 600 is connected to the rotating shaft 410, and the manual driving assembly 600 is used to drive the rotating shaft 410 to move along the axial direction of the rotating shaft 410, thereby making the intermediate gear 420 mesh with one of the driving gear 210 and the retraction rack 510.

[0044] When the electric retraction function fails, operate the manual drive assembly 600 to drive the intermediate gear 420 to be offset from the drive gear 210 and to engage with the retraction rack 510, push the toggle member 520, drive the retraction rack 510 to move, drive the intermediate gear 420 to rotate, and drive the drive rack 300 to move, thereby realizing manual retraction. The operation is convenient and the manual retraction efficiency is high, which can minimize the damage caused by medical accidents and improve the safety of the use of the stapler.

[0045] In some embodiments, see Figure 1 , Figure 2 and Figure 4 A spring 411 is sleeved on the rotating shaft 410, one end of the spring 411 abuts against the intermediate gear 420, and the other end of the spring 411 abuts against the inner wall of the housing 100, and the spring 411 is used to push the intermediate gear 420 to mesh with the driving gear 210. The spring 411 is sleeved on the rotating shaft 410, and the spring 411 pushes the final gear to mesh with the driving gear 210, ensuring that the driving force of the driving motor 200 can be stably transmitted to the driving rack 300 in a normal state.

[0046] In some embodiments, see Figure 1 , Figure 2 and Figure 4The first washer and the second washer 413 are sleeved on the rotating shaft 410, the first washer is located between the intermediate gear 420 and the spring 411, and the second washer 413 is located between the spring 411 and the inner wall of the housing 100. The first washer and the second washer 413 are arranged at both ends of the spring 411 to reduce the friction between the spring 411 and the intermediate gear 420 and the inner wall of the housing 100.

[0047] In some embodiments, see Figure 1 , Figure 2 and Figure 3 , one end of the rotating shaft 410 is exposed from the housing 100, and a toggle shaft 412 is provided on the portion of the rotating shaft 410 exposed from the housing 100 along the radial direction of the rotating shaft 410. The manual drive assembly 600 includes a toggle block 610, which is mounted on the outside of the housing 100, and the toggle block 610 is rotatably connected to the rotating shaft 410 through the toggle shaft 412. The distance from the toggle shaft 412 to the end of the toggle block 610 is greater than the distance from the toggle shaft 412 to the side of the toggle block 610. The toggle block 610 is used to drive the rotating shaft 410 to move along the axial direction of the rotating shaft 410 when rotating, so as to make the intermediate gear 420 mesh with one of the driving gear 210 and the retracting rack 510.

[0048] In the initial state, the intermediate gear 420 is meshed with the driving rack 300 and the driving gear 210, and the shifting block 610 is moved to drive the shifting block 610 to rotate, drive the rotating shaft 410 to move along the axial direction of the rotating shaft 410, drive the intermediate gear 420 to move, and the intermediate gear 420 is staggered with the driving gear 210 and meshed with the retracting rack 510.

[0049] The shifting block 610 is shifted again to reset the shifting block 610 , and the intermediate gear 420 moves downward under the thrust of the spring 411 , and the intermediate gear 420 is offset from the retracting rack 510 and meshes with the driving gear 210 .

[0050] In some embodiments, see Figure 1 , Figure 2 and Figure 3, the shift block 610 can be operably switched to the first position or the second position. When the shift block 610 is in the first position, the side of the shift block 610 abuts against the housing 100, the intermediate gear 420 is staggered with the retracting rack 510, and the intermediate gear 420 is meshed with the driving gear 210 and the driving rack 300. When the shift block 610 is in the second position, the end of the shift block 610 abuts against the housing 100, the intermediate gear 420 is staggered with the driving gear 210, and the intermediate gear 420 is meshed with the retracting rack 510 and the driving rack 300. When the shift block 610 is in the first position, it is a normal state, and the driving motor 200 drives the driving rack 300 to move through the driving gear 210 and the intermediate gear 420. When the shift block 610 is in the second position, the shift member 520 can be manually pushed to drive the retracting rack 510 to move, thereby driving the intermediate gear 420 to rotate, and then driving the driving rack 300 to move.

[0051] In some embodiments, see Figure 1 , Figure 2 and Figure 3 When the shift block 610 is in the first position, the length direction of the shift block 610 is perpendicular to the axial direction of the rotating shaft 410. At this time, the shift block 610 can be attached to the surface of the housing 100 for easy storage. When the shift block 610 is in the second position, the length direction of the shift block 610 is parallel to the axial direction of the rotating shaft 410. When the shift block 610 is straightened, the shift block 610 pulls the rotating shaft 410, driving the intermediate gear 420 to stagger with the driving gear 210 and mesh with the retracting rack 510; at this time, the spring 411 can also tighten the shift block 610 through the rotating shaft 410, ensuring that the end of the shift block 610 can be attached to the surface of the housing 100, ensuring that the shift block 610 can be stably maintained in the second position.

[0052] In some embodiments, see Figure 1 , Figure 2 and Figure 3 The rotating shaft 410 is sleeved with a third gasket 414, which is located outside the housing 100, and the shift block 610 abuts against the third gasket 414. The third gasket 414 can reduce the friction between the shift block 610 and the housing 100, is easy to replace, and ensures the service life of the housing 100.

[0053] In some embodiments, see Figure 1 , Figure 2 and Figure 3 The end of the block 610 away from the toggle shaft 412 is flat, and when the block 610 is attached to the surface of the housing 100, there is a gap between the end of the block 610 away from the toggle shaft 412 and the housing 100, which facilitates the hand to reach in and toggle the block 610. The end of the block 610 close to the toggle shaft 412 and the side close to the housing 100 is rounded, making it smoother to toggle the block 610.

[0054] In some embodiments, see Figure 1 , Figure 2 and Figure 3 In the axial direction of the rotating shaft 410, the driving rack 300 is located between the driving gear 210 and the retracting rack 510. The intermediate gear 420 is always meshed with the driving rack 300. The shifting block 610 is shifted to drive the rotating shaft 410 to move along the axial direction of the rotating shaft 410, and the intermediate gear 420 is shifted along the axial direction of the rotating shaft 410, so that the intermediate gear 420 can be meshed with one of the driving gear 210 and the retracting rack 510.

[0055] See also Figure 1 and Figure 4 According to an embodiment of the utility model, a stapler includes a housing 100, a driving motor 200, a driving rack 300 and a manual retraction mechanism. The driving motor 200 is installed in the housing 100, the driving gear 210 is connected to the output end of the driving motor 200, and the manual retraction mechanism is installed on the housing 100.

[0056] When the electric retraction function fails, operate the manual drive assembly 600 to drive the intermediate gear 420 to be offset from the drive gear 210 and to engage with the retraction rack 510, push the toggle member 520, drive the retraction rack 510 to move, drive the intermediate gear 420 to rotate, and drive the drive rack 300 to move, thereby realizing manual retraction. The operation is convenient and the manual retraction efficiency is high, which can minimize the damage caused by medical accidents and improve the safety of the use of the stapler.

[0057] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0058] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A manual retraction mechanism, the stapler comprises a housing, a drive motor and a drive gear, the drive motor is installed in the housing, the drive gear is connected to the output shaft of the drive motor, characterized in that: include: A driving rack is slidably connected in the housing, and the driving rack is used to move back and forth to transmit power to drive the stapler to work; A transmission assembly, comprising a rotating shaft and an intermediate gear, wherein the rotating shaft is mounted on the housing, the intermediate gear is mounted on the rotating shaft, and the intermediate gear is meshed with the driving rack; A manual retraction assembly comprises a retraction rack and a toggle member, wherein the retraction rack is slidably connected in the housing, and one end of the toggle member extends into the housing and is connected to the retraction rack; A manual drive assembly is connected to the rotating shaft, and is used to drive the rotating shaft to move along the axial direction of the rotating shaft so that the intermediate gear is meshed with one of the driving gear and the retracting rack.

2. A manual retraction mechanism according to claim 1, characterized in that: A spring is sleeved on the rotating shaft, one end of the spring abuts against the intermediate gear, and the other end of the spring abuts against the inner wall of the casing, and the spring is used to push the intermediate gear to engage with the driving gear.

3. A manual retraction mechanism according to claim 2, characterized in that: The rotating shaft is sleeved with a first washer and a second washer, the first washer is located between the intermediate gear and the spring, and the second washer is located between the spring and the inner wall of the casing.

4. A manual retraction mechanism according to claim 1, characterized in that: One end of the rotating shaft is exposed from the housing, and a shifting shaft is provided on the portion of the rotating shaft exposed from the housing protruding along the radial direction of the rotating shaft; The manual drive assembly includes a shift block, which is installed on the outside of the casing. The shift block is rotatably connected to the rotating shaft through the shift shaft. The distance from the shift shaft to the end of the shift block is greater than the distance from the shift shaft to the side of the shift block. The shift block is used to drive the rotating shaft to move axially along the rotating shaft when rotating so that the intermediate gear is engaged with one of the driving gear and the retracting rack.

5. A manual retraction mechanism according to claim 4, characterized in that: The shift block can be operably switched to a first position or a second position. When the shift block is in the first position, the side surface of the shift block abuts against the housing, the intermediate gear is staggered from the retracting rack, and the intermediate gear is meshed with the driving gear and the driving rack; When the shift block is located at the second position, the end of the shift block abuts against the housing, the intermediate gear is staggered from the driving gear, and the intermediate gear is meshed with the retracting rack and the driving rack.

6. A manual retraction mechanism according to claim 5, characterized in that: When the shift block is located at the first position, the length direction of the shift block is perpendicular to the axial direction of the rotating shaft; when the shift block is located at the second position, the length direction of the shift block is parallel to the axial direction of the rotating shaft.

7. A manual retraction mechanism according to claim 4, characterized in that: A third gasket is sleeved on the rotating shaft, the third gasket is located outside the housing, and the shifting block abuts against the third gasket.

8. A manual retraction mechanism according to claim 4, characterized in that: The shift block is arranged flatly at one end away from the shift shaft, and is arranged rounded at one end close to the shift shaft and close to one side of the housing.

9. The manual retraction mechanism according to claim 1, characterized in that: In the axial direction of the rotating shaft, the driving rack is located between the driving gear and the retracting rack.

10. A stapler, characterized in that: include: chassis; A driving motor is installed in the casing; A driving gear connected to an output end of the driving motor; The manual retraction mechanism as described in any one of claims 1 to 9 is installed on the casing.

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