Knob device and stapler

Abstract

The present invention provides a knob device and an anastomosis device, wherein the knob device comprises a housing, a knob body, a transmission member, a driven member and a shift plate. The housing is provided with a receiving cavity and an assembly hole which are interconnected; the knob body is assembled in the assembly hole and can rotate relative to the housing; the transmission member is assembled in the receiving cavity and has a rotating shaft which protrudes into the assembly hole and is fixedly connected with the knob body; the driven member is located between the transmission member and the knob body, the driven member is provided with a through hole for the rotating shaft to pass through, and a through groove arranged around the outer periphery of the driven member, and the opening directions of the through groove and the through hole are perpendicular to each other; the shift plate is located at the outer periphery of the driven member and is fixedly connected with the housing; a positioning member is fixed on the driven member, and a part of the positioning member is exposed to the outer side of the driven member, and a positioning groove for accommodating the positioning member is correspondingly arranged on the shift plate, and at least two positioning grooves are arranged, and when the knob body is rotated so that the positioning member is in one of the positioning grooves, the knob device is in the first gear; when the knob body is rotated so that the positioning member is in the other positioning groove, the knob device is in the second gear. Compared with the prior art, the knob device and the stapler of the present invention provide different gears on the gear plate, so that the operator can control the rotation range of the knob device more accurately and the operation is more convenient.

Description

Technical Field

[0001] The invention relates to a knob device and an anastomosis device, belonging to the field of medical instruments. Background Art

[0002] A stapler is a device used in medicine to replace traditional manual suturing. Due to the development of modern science and technology and the improvement of manufacturing technology, the stapler's anastomotic components are usually set to be rotatable to improve the flexibility of the stapler itself.

[0003] The knob device is used to control the rotation of the stapler's stapler assembly. Usually, gear teeth are arranged inside the knob device to adjust the rotation range of the knob device through the meshing between the gear teeth. However, this brings about problems such as insufficient rotation accuracy and poor operating feel.

[0004] In view of this, it is indeed necessary to improve the existing knob device and stapler to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a knob device which can improve the rotation accuracy and the operation feeling of the operator.

[0006] To achieve the above object, the present invention provides a knob device, comprising:

[0007] The housing is provided with a receiving cavity and an assembly hole which are communicated with each other;

[0008] A knob body, assembled in the assembly hole and capable of rotating relative to the housing;

[0009] A transmission member, which is assembled in the receiving cavity and has a rotating shaft protruding into the assembly hole and fixedly connected to the knob body;

[0010] A follower is located between the transmission member and the knob body, the follower is provided with a through hole for the rotation shaft to pass through, and a through groove arranged around the outer circumference of the follower, and the opening directions of the through groove and the through hole are perpendicular to each other; and

[0011] A shift plate, arranged around the outer periphery of the driven member and fixedly connected to the housing;

[0012] A positioning member is fixed in the through groove of the follower, and a portion of the positioning member is exposed on the outside of the follower. A positioning groove for accommodating the positioning member is correspondingly provided on the shift plate, and at least two positioning grooves are provided. When the knob body is rotated so that the positioning member is in one of the positioning grooves, the knob device is in the first gear position; when the knob body is rotated so that the positioning member is in the other positioning groove, the knob device is in the second gear position.

[0013] As a further improvement of the present invention, the outer periphery of the shift plate is provided with latching teeth, and the shell is provided with corresponding latching grooves, and the latching teeth are received in the latching grooves, so that the shift plate is fixedly connected to the shell.

[0014] As a further improvement of the present invention, an elastic bead is provided at one end of the positioning member exposed to the outside of the follower. The elastic bead is accommodated in the positioning groove and can be elastically deformed during the rotation of the knob body.

[0015] The present invention also provides a stapler, which can improve the rotation accuracy of the stapler assembly and enhance the operating feel of the operator.

[0016] To achieve the above object, the present invention provides a stapler, comprising the aforementioned knob device, and the stapler further comprises:

[0017] a barrel assembly having a first end and a second end;

[0018] an anastomosis assembly, located at a first end of the barrel assembly and rotatably connected to the barrel assembly;

[0019] a trigger assembly connected to the second end of the barrel assembly;

[0020] Wherein, the knob device is also located at the second end of the barrel assembly and is fixedly connected to the trigger assembly to control the rotation of the matching assembly relative to the barrel assembly.

[0021] As a further improvement of the present invention, the shell is provided with a through hole, and the second end of the barrel assembly is connected to the trigger assembly after passing through the through hole. A limiting column is provided on the side of the transmission member facing away from the follower. When the knob device is rotated until the limiting column abuts against the barrel assembly, the rotation angle of the matching assembly reaches a maximum.

[0022] As a further improvement of the present invention, the knob device also includes a movable block accommodated inside the accommodating cavity and movably connected to the barrel assembly, the transmission member is connected to the movable block, and the movable block is configured to be able to move horizontally along the barrel assembly under the drive of the transmission member.

[0023] As a further improvement of the present invention, a groove is provided on a side of the movable block facing the transmission member, and the limiting column is received in the groove so as to slide in the groove in the process of driving the movable block to move.

[0024] As a further improvement of the present invention, the barrel assembly includes a sleeve, a second end of the sleeve is provided with a clamping portion, the sleeve is transmission-connected to the trigger assembly, and can move toward the anastomosis assembly under the drive of the trigger assembly until the clamping portion is engaged with the knob device.

[0025] As a further improvement of the present invention, the transmission member is provided with a tooth groove corresponding to the positioning groove, and when the positioning member is received in the positioning groove, the clamping portion can engage with the corresponding tooth groove under the drive of the trigger assembly.

[0026] As a further improvement of the present invention, the stapler also includes a limiting device, which includes a first limiting device connected to the trigger assembly, and a second limiting device fixed inside the stapler, and the first limiting device is configured to be transmission-connected to the trigger assembly so as to be displaced to engage with the second limiting device as the trigger assembly is pulled.

[0027] The beneficial effects of the present invention are as follows: the knob device of the present invention provides a receiving cavity and an assembly hole that are interconnected on the housing, so that the knob body assembled in the assembly hole and the transmission member and the driven member accommodated in the receiving cavity are kept relatively still, and then a shift plate fixedly connected to the housing is provided on the periphery of the driven member, so that when the knob body is rotated, the positioning member is driven to rotate, and then the positioning member is moved from one positioning groove of the shift plate to another positioning groove, thereby completing the gear switching. Compared with the prior art, the present invention not only ensures the accuracy of rotation, but also improves the operator's operating feel. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of the stapler in accordance with the preferred embodiment of the present invention.

[0029] Figure 2 yes Figure 1 A schematic diagram of the partial structure of the anastomosis assembly and the rotation assembly of the anastomosis device shown.

[0030] Figure 3 yes Figure 1 Exploded view of the center knob assembly.

[0031] Figure 4 yes Figure 1 Schematic diagram of the partial structure of the sleeve of the middle barrel assembly.

[0032] Figure 5 yes Figure 1 A partial structural diagram of the stapler shown.

[0033] Figure 6 yes Figure 5 A partial enlarged view of the circled part.

[0034] Figure 7 yes Figure 1 Schematic diagram of the local structure of the closed ring and casing. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] See also Figure 1 and Figure 5 As shown, the present invention discloses a stapler 100 for abdominal surgery, comprising a stapler assembly 1, a barrel assembly 2, a trigger assembly 3 and a knob device 4. The barrel assembly 2 has a first end 21 and a second end 22, and the stapler assembly 1 is located at the first end 21 of the barrel assembly 2 and can rotate relative to the barrel assembly 2.

[0037] In this embodiment, the anastomosis assembly 1 can swing left and right relative to the barrel assembly 2, but in other embodiments, it is not limited to being able to swing left and right relative to the barrel assembly 2. Preferably, the knob device 4 is rotated to drive the swing of the anastomosis assembly 1, and then the trigger assembly 3 is pulled to lock the knob device 4 to limit the rotation of the knob device 4, thereby locking the swing angle of the anastomosis assembly 1.

[0038] For details, please combine Figure 2 As shown, the anastomosis assembly 1 has a pin 11 connected to the first end 21, and the anastomosis assembly 1 is rotatably connected to the barrel assembly 2 via the pin 11. In other embodiments, the swing direction of the anastomosis assembly 1 can be controlled by setting the position of the pin 11, which is not limited.

[0039] In this embodiment, a rotary assembly 5 is provided inside the first end 21 of the barrel assembly 2 and is transmission-connected to the knob device 4. The anastomotic assembly 1 is fixedly connected to the rotary assembly 5 via the pin 11. When the knob device 4 is rotated, the rotary assembly 5 rotates accordingly and drives the anastomotic assembly 1 to swing left and right relative to the barrel assembly 2. In other words, the pin 11 serves as a connecting piece between the anastomotic assembly 1 and the rotary assembly 5, so that the anastomotic assembly 1 can remain relatively still with the rotary assembly 5 and swing following the rotation of the rotary assembly 5.

[0040] The rotary assembly 5 includes a wheel disc 51, which is in transmission connection with the knob device 4 via a transmission rod 52. A plurality of shark teeth 511 are provided on one side of the wheel disc 51. A clamping member 53 facing the shark teeth 511 is provided inside the first end 21 of the barrel assembly 2, and the clamping member 53 is meshed with the shark teeth 511. The transmission rod 52 is used to provide a transmission connection so that the rotation of the rotating device 4 can drive the rotary assembly 5 to rotate synchronously. Its structure is a conventional structure and will not be described in detail.

[0041] Preferably, the clamping member 53 includes a clamping block 531 and an elastic member 532 sleeved on the outside of the clamping block 531, and the elastic member 532 has a free state and a deformed state. When the elastic member 532 is in the free state, the clamping block 531 is engaged with the shark tooth 511, and when the elastic member 532 is in the deformed state, the clamping block 531 and the shark tooth 511 are disengaged from each other.

[0042] That is to say, a movable space for the clamping member 53 to slide is provided in the first end 21 of the barrel assembly 2, and the clamping member 53 can slide within a certain range to engage with or disengage from the shark tooth 511.

[0043] Specifically, the clamping block 531 is clamped into the shark tooth 511 under the elastic force of the elastic member 532, so that the anastomotic assembly 1 and the barrel assembly 2 remain relatively still at all times. However, due to the presence of the elastic member 532, when the knob device 4 is rotated, the rotary assembly 5 can also be driven to rotate, and then the elastic member 532 is compressed, so that the clamping block 531 is disengaged from the clamping connection with the shark tooth 511, and the anastomotic assembly 1 can swing left and right relative to the barrel assembly 2. In other words, the rotary assembly 5 has a self-locking device with a weaker locking level, which can lock the anastomotic assembly 1 when in use, and can also not affect the swing of the anastomotic assembly 1 when the position of the anastomotic assembly 1 needs to be adjusted.

[0044] Please combine Figure 7 As shown, a closing collar 6 is also sleeved on the first end 21 of the barrel assembly 2, and the closing collar 6 can move from the first end 21 of the barrel assembly 2 toward the anastomosis assembly 1, and close the anastomosis assembly 1 so as to allow the closing collar 6 to pass through. In other words, the closing collar 6 realizes the closure of the anastomosis assembly 1.

[0045] Please combine Figure 3As shown, the knob device 4 includes a housing 42, a knob body 41, a transmission member 43, a follower 44 and a shift plate 45. The housing 42 is provided with a receiving cavity 421 and an assembly hole 422 which are communicated with each other. The knob body 41 is assembled in the assembly hole 422 and can rotate relative to the housing 42. The transmission member 43, the follower 44 and the shift plate 45 are all assembled in the receiving cavity 421. The barrel assembly 2 passes through the receiving cavity 421 and is partially accommodated in the receiving cavity 421.

[0046] The transmission member 43 has a rotating shaft 431 protruding into the assembly hole 422 and fixedly connected to the knob body 41; the driven member 44 is located between the transmission member 43 and the knob body 41, and is provided with a through hole 440 for the rotating shaft 431 to pass through, and a through groove 442 arranged around the outer circumference of the driven member 44, the through groove 442 and the through hole 440 are perpendicular to each other, and the transmission member 43 and the driven member 44 are relatively stationary. In other words, the rotation of the knob body 41 can drive the transmission member 43 and the driven member 44 to rotate synchronously.

[0047] The shift plate 45 is disposed around the outer periphery of the follower 44 and is fixedly connected to the housing 42. The shift plate 45 is provided with a plurality of shift positions, so as to determine the rotation amplitude of the knob body 41 relative to the shift plate 45. Preferably, the outer periphery of the shift plate 45 is provided with a plurality of latch teeth 452, and the housing 42 is provided with corresponding latch grooves 423, and the latch teeth 452 are received in the latch grooves 423, so that the shift plate 45 is fixedly connected to the housing 42.

[0048] Specifically, a positioning member 441 is fixed in the through groove 442 of the follower 44, and a portion of the positioning member 441 is exposed on the outside of the follower 44. A positioning groove 451 for accommodating the positioning member 441 is correspondingly provided on the shift plate 45, and at least two positioning grooves 451 are provided. When the knob body 41 is rotated to make the positioning member 441 in one of the positioning grooves 451, the knob device 4 is in the first gear; when the knob body 41 is rotated to make the positioning member 441 in the other positioning groove 451, the knob device 4 is in the second gear.

[0049] That is to say, the positioning slot 451 is the gear position of the knob device 4, and when in use, the switching of the units can be confirmed through the different hand feelings of the positioning slot 451 when being accommodated in the positioning slot 451 and when being separated from the positioning slot 451, which undoubtedly provides a high-quality user experience.

[0050] Preferably, an elastic bead 4411 is provided at one end of the positioning member 441 exposed to the follower 44, and the elastic bead 4411 is received in the positioning groove 451 and can be elastically deformed during the rotation of the knob body 41. By providing the elastic bead 4411, it is ensured that the positioning member 441 can be smoothly switched between different positioning grooves 451, and the damage of the positioning groove 451 or the positioning member 441 due to violent rotation is avoided.

[0051] The housing 42 is also provided with a through hole 424 connected to the receiving chamber 421, and the through hole 424 is for the barrel assembly 2 to pass through. The second end 22 of the barrel assembly 2 is connected to the trigger assembly 3 after passing through the through hole 424. The transmission member 43 is located at the upper part of the barrel assembly 2, and a limiting column 432 is provided on the side away from the follower 44. When the knob device 4 is rotated until the limiting column 432 abuts against the barrel assembly 2, the rotation angle of the anastomosis assembly 1 reaches the maximum, that is, the swing amplitude reaches the maximum. In other words, the gear position of the knob device 4 and the maximum swing amplitude of the anastomosis assembly 1 can be adjusted by setting the distance between the limiting column 432 and the barrel assembly 2.

[0052] In this embodiment, the knob device 4 also includes a movable block 47 accommodated inside the accommodating cavity 421 and movably connected to the barrel assembly 2. A groove 471 is provided on the side of the movable block 47 facing the limiting column 432. The limiting column 432 is accommodated in the groove 471 and can drive the movable block 47 to move relative to the barrel assembly 2 by rotating the knob device 4, that is, the linear motion of the movable block 47 is driven by the circular rotation of the limiting column 432. The groove 471 is the trajectory of the limiting column 432 that gradually changes according to the rotation.

[0053] In contrast, please combine Figure 4 As shown, the barrel assembly 2 includes a sleeve 23, a second end of the sleeve 23 is provided with a clamping portion 231, the sleeve 23 is in transmission connection with the trigger assembly 3, and can move toward the anastomotic assembly 1 under the drive of the trigger assembly 3 until the clamping portion 231 is clamped with the knob device 4. Of course, the closing ring 6 abuts against the sleeve 23 and can be pushed by the sleeve 23 to close the anastomotic assembly 1.

[0054] A plurality of tooth grooves 433 are provided on one side of the transmission member 43 facing the clamping portion 231, and the tooth grooves 433 correspond to the positioning grooves 451. When the positioning member 441 is received in the positioning grooves 451, the clamping portion 231 can be engaged with the corresponding tooth grooves 433 under the drive of the trigger assembly 3. In other words, the tooth grooves 433 and the positioning grooves 451 can both represent the gear positions of the knob device 4 and correspond to each other.

[0055] The trigger assembly 3 includes a trigger 31 and a transmission assembly 32 connecting the trigger 31 and the sleeve 23. The transmission assembly 32 is formed by connecting multiple parts and can be displaced as the trigger 31 is engaged. One end of the transmission assembly 32 is connected to the trigger 31, and the other end is engaged with the sleeve 23 and can drive the sleeve 23 to move. Therefore, in this embodiment, when the trigger 31 is engaged, the transmission assembly 32 is driven to move, and then the sleeve 23 is pushed to move toward the direction of the anastomotic assembly 1, so that the engaging portion 231 above the sleeve 23 is engaged in the tooth groove 433 of the transmission member 43.

[0056] Please combine Figure 6 As shown, the stapler 100 also includes a limiting device 7 for limiting the trigger assembly 3, and the limiting device 7 includes a first limiting device 71 connected to the trigger assembly 3, and a second limiting device 72 fixed inside the stapler 100. The first limiting device 71 is displaced following the pulling of the trigger 31, thereby engaging with the second limiting device 72 to limit the trigger assembly 3 in the engaged position, that is, the engaging portion 231 above the sleeve 23 is engaged in the tooth groove of the transmission member 43, thereby limiting the rotation of the knob device 4.

[0057] Preferably, the stapler 100 also includes an unlocking device 8, which is opposite to the second limiting device 72 and can be disengaged from the first limiting device 71 by pressing the unlocking device 8, that is, the clamping portion 231 above the sleeve 23 is disengaged from the tooth groove 433 of the transmission member 43, so that the knob device 4 can rotate normally.

[0058] Therefore, the stapler 100 has two sets of locking devices, namely, the locking device activated by the trigger assembly 3 and the self-locking device automatically activated in the rotary assembly 5 .

[0059] In summary, the knob device 4 and the stapler 100 of the present invention provide a receiving cavity 421 and an assembly hole 422 that are interconnected on the housing 42, so that the knob body 41 assembled in the assembly hole 422 and the transmission member 43 and the driven member 44 accommodated in the receiving cavity 421 are kept relatively still, and then a shift plate 45 fixedly connected to the housing 42 is provided between the transmission member 43 and the driven member 44, so that when the knob body 41 is rotated, the positioning member 441 can be driven to rotate, and then the positioning member 441 can be moved from one of the positioning grooves 451 of the shift plate 45 to another positioning groove 451 to complete the gear switching. In this way, not only the rotation accuracy is ensured, but also the operator's operating feel is improved.

[0060] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A knob device, applied to a stapler, characterized in that: include: The housing is provided with a receiving cavity and an assembly hole which are communicated with each other; A knob body, assembled in the assembly hole and capable of rotating relative to the housing; A transmission member, which is assembled in the receiving cavity and has a rotating shaft protruding into the assembly hole and fixedly connected to the knob body; A follower is located between the transmission member and the knob body, the follower is provided with a through hole for the rotation shaft to pass through, and a through groove arranged around the outer circumference of the follower, and the opening directions of the through groove and the through hole are perpendicular to each other; and A shift plate, arranged around the outer periphery of the driven member and fixedly connected to the housing; A positioning member is fixed in the through groove of the driven member, and a portion of the positioning member is exposed outside the driven member. A positioning groove for accommodating the positioning member is correspondingly provided on the shift plate, and at least two positioning grooves are provided. When the knob body is rotated so that the positioning member is located in one of the positioning grooves, the knob device is in the first gear position; when the knob body is rotated so that the positioning member is located in the other positioning groove, the knob device is in the second gear position. The knob device is located on the barrel assembly of the stapler, and the knob device is used to control the rotation of the stapler assembly relative to the barrel assembly. The barrel assembly is provided with a clamping portion, and a plurality of tooth grooves are provided on a side of the transmission member facing the clamping portion. The barrel assembly is connected to the trigger assembly of the stapler and can move toward the stapler assembly under the drive of the trigger assembly, so that the clamping portion engages with the corresponding tooth groove, and the barrel assembly closes the stapler assembly.

2. The knob device according to claim 1, characterized in that: The outer periphery of the shift plate is provided with latching teeth, and the shell is provided with corresponding latching grooves, and the latching teeth are received in the latching grooves, so that the shift plate is fixedly connected to the shell.

3. The knob device according to claim 1, characterized in that: An elastic bead is provided at one end of the positioning member exposed to the outside of the driven member. The elastic bead is accommodated in the positioning groove and can be elastically deformed during the process of rotating the knob body.

4. A stapler, characterized in that: The stapler comprises a knob device according to any one of claims 1 to 3, wherein the stapler further comprises: a barrel assembly having a first end and a second end; an anastomosis assembly, located at a first end of the barrel assembly and rotatably connected to the barrel assembly; a trigger assembly connected to the second end of the barrel assembly; Wherein, the knob device is also located at the second end of the barrel assembly and is fixedly connected to the trigger assembly to control the rotation of the matching assembly relative to the barrel assembly.

5. The stapler according to claim 4, characterized in that: The shell is provided with a through hole, and the second end of the barrel assembly is connected to the trigger assembly after passing through the through hole. A limiting column is provided on the side of the transmission member facing away from the follower. When the knob device is rotated until the limiting column abuts against the barrel assembly, the rotation angle of the matching assembly reaches the maximum.

6. The stapler according to claim 5, characterized in that: The knob device also includes a movable block accommodated in the accommodating cavity and movably connected to the barrel assembly. The transmission member is connected to the movable block, and the movable block is configured to be able to move horizontally along the barrel assembly under the drive of the transmission member.

7. The stapler according to claim 6, characterized in that: A groove is provided on one side of the movable block facing the transmission member, and the limiting column is received in the groove so as to slide in the groove in the process of driving the movable block to move.

8. The stapler according to claim 4, characterized in that: The barrel assembly includes a sleeve, the clamping portion is arranged at the second end of the sleeve, the sleeve is transmission-connected with the trigger assembly, and can move toward the anastomosis assembly under the drive of the trigger assembly until the clamping portion is clamped with the knob device.

9. The stapler according to claim 8, characterized in that: The tooth groove corresponds to the positioning groove. When the positioning member is received in the positioning groove, the clamping portion can be engaged with the corresponding tooth groove under the drive of the trigger assembly.

10. The stapler according to claim 9, characterized in that: The stapler also includes a limiting device, which includes a first limiting device connected to the trigger assembly and a second limiting device fixed inside the stapler. The first limiting device is configured to be transmission-connected to the trigger assembly so as to be displaced to engage with the second limiting device as the trigger assembly is pulled.

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