Gear adjusting mechanism and surgical instrument

Abstract

The utility model provides a gear adjusting mechanism and a surgical instrument. The gear adjusting mechanism comprises a knob assembly and a damping assembly. The knob assembly is pivotally mounted on a housing of the surgical instrument; the damping assembly comprises a sliding resistance piece and an elastic piece. The sliding stop piece is arranged between the knob assembly and the shell and abuts against the knob assembly or the shell under the action of the elastic piece. When the knob assembly rotates around the pivot, each sliding resistance piece can slide along the knob assembly or the shell and apply damping force opposite to the rotation direction of the knob assembly to the knob assembly. The gear adjusting mechanism can be applied to the surgical instrument, and certain damping acting force can be provided for adjustment of the knob assembly in the surgical instrument through the damping assembly. Therefore, not only is a good operation hand feeling provided for an operator, but also the knob assembly can be accurately stopped at the required gear due to the existence of the damping acting force, and the operation difficulty of the surgical instrument is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a gear adjustment mechanism and a surgical instrument. Background Technology

[0002] Surgical staplers are commonly used surgical instruments in medicine as an alternative to manual suturing. Their main working principle involves using a scalpel to sever tissue and titanium staples to anastomose it. Depending on the body part being treated, various staplers are available. For surgical staplers, the working principle involves inserting a cannula of a precisely positioned trocar into the patient's body at the surgical site. This creates a longitudinal incision in the tissue, and staples are applied to the opposite side of the incision, thereby severing and anastomosing the tissue.

[0003] The part of the stapler that enters the patient's body through the cannula is its distal working head. During the operation, the positioning and precise locking of the distal working head need to be adjusted using a knob under endoscopic guidance. To achieve this, the existing stapler knob requires a relatively high degree of control force during adjustment, meaning the knob needs to be precisely stopped at the desired setting.

[0004] The aforementioned operational requirements have caused some inconvenience to operators. Therefore, it is necessary to propose further solutions to address these issues. Utility Model Content

[0005] The present invention aims to provide a gear adjustment mechanism and a surgical instrument to overcome the shortcomings of the prior art.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0007] A gear adjustment mechanism is applicable to surgical instruments and is drive-connected to the working head of the surgical instruments; the gear adjustment mechanism includes: a knob assembly and a damping assembly;

[0008] The knob assembly is pivotally mounted on the housing of the surgical instrument;

[0009] The damping assembly includes a sliding element and an elastic element; the sliding element is disposed between the knob assembly and the housing, and abuts against the knob assembly or the housing under the action of the elastic element;

[0010] When the knob assembly rotates about its pivot, each sliding element can slide along the knob assembly or the housing and apply a damping force to the knob assembly in the opposite direction to its rotation.

[0011] As an improvement to the gear adjustment mechanism of this utility model, the sliding resistance is a spherical or cylindrical part, and the elastic part is a spring; one end of the spring abuts against the sliding resistance and the other end abuts against the knob assembly or the housing.

[0012] As an improvement to the gear adjustment mechanism of this utility model, the knob assembly is provided with a plurality of mounting grooves; the elastic element is received in the mounting grooves, and the sliding element extends at least partially from the mounting grooves and abuts against the inner sidewall of the housing.

[0013] As an improvement to the gear adjustment mechanism of this utility model, the number of sliding resistance elements is several; the several sliding resistance elements are arranged circumferentially at equal intervals between the knob assembly and the housing.

[0014] As an improvement to the gear adjustment mechanism of this utility model, the gear adjustment mechanism further includes a locking position disposed on the knob assembly or the housing; when the sliding member is aligned with the locking position, it can cooperate with the locking position.

[0015] As an improvement to the gear adjustment mechanism of this utility model, the locking positions and / or sliding resistance components are at least two circumferentially spaced apart; the adjustment angle of the gear adjustment mechanism is limited by the minimum angle value among the included angles between the locking positions and the included angles between the sliding resistance components.

[0016] As an improvement to the gear adjustment mechanism of this utility model, the locking position is a locking groove provided on the inner side wall of the housing, and the shape of the locking groove corresponds to the shape of the sliding resistance.

[0017] As an improvement to the gear adjustment mechanism of this utility model, the knob assembly includes: a knob body and a steering shaft;

[0018] One end of the steering shaft is fixedly connected to the knob body, and the other end is provided with a disc; the disc unlocks the working head of the surgical instrument through a driving component at its bottom; the damping component is disposed between the outer wall of the disc and the inner wall of the housing.

[0019] As an improvement to the gear adjustment mechanism of this utility model, the outer wall of the steering shaft is connected and fitted with the knob body, and the steering shaft and the knob body are also connected by a radial pin.

[0020] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0021] A surgical instrument includes a gear adjustment mechanism as described above, through which the working head of the surgical instrument can be adjusted.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] The gear adjustment mechanism of this invention can be applied to surgical instruments. By incorporating a damping component, it provides a certain damping force to the adjustment of the knob assembly in the surgical instrument. This not only provides the operator with a good operating feel, but also, due to the damping force, helps the knob assembly to accurately stop at the desired gear position, greatly reducing the difficulty of operating surgical instruments and facilitating the gear adjustment of the anastomosis device.

[0024] Furthermore, the gear adjustment mechanism of this invention, through the setting of a locking structure, enables the indexing adjustment of the knob in the surgical instrument. That is, the knob can be rotated according to a preset angle and then stop at the corresponding indexing position. In this way, it is beneficial to set different indexing positions according to different application scenarios and operating modes, thereby realizing the rapid adjustment of the surgical instrument gear. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a three-dimensional schematic diagram of Embodiment 1 of the gear adjustment mechanism of this utility model;

[0027] Figure 2 for Figure 1 3D exploded view of the mid-range adjustment mechanism;

[0028] Figure 3 for Figure 1 A three-dimensional exploded view of the mid-range adjustment mechanism from another angle;

[0029] Figure 4 for Figure 1 A magnified 3D diagram of the central rotating disk;

[0030] Figure 5 for Figure 1 A cross-sectional view of the central rotating disk;

[0031] Figure 6 This is a cross-sectional view of Embodiment 2 of the gear adjustment mechanism of this utility model, specifically a cross-sectional view of the damping component and the disk in which it is located.

[0032] Figure 7 This is a three-dimensional schematic diagram of the third embodiment of the surgical instrument of this utility model. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Example 1

[0035] This embodiment provides a gear adjustment mechanism that can be applied to surgical instruments to assist the working head of the surgical instrument in gear adjustment.

[0036] In this embodiment, the surgical instrument can specifically be a stapler. The technical solution of the gear adjustment mechanism in this embodiment will be described in detail below, using a stapler as an example. Furthermore, the gear adjustment mechanism of this embodiment is also applicable to other surgical instruments with knob adjustment and control functions.

[0037] When the gear adjustment mechanism of this embodiment is applied to a stapler, it provides a certain damping force for adjusting the knob in the stapler. This not only provides the operator with a good feel, but also, due to the damping force, helps the knob assembly to accurately stop at the desired gear, greatly reducing the difficulty of operating the stapler and facilitating gear adjustment. Thus, it overcomes the problem in the prior art that requires a high degree of force to operate the knob and makes it difficult to accurately stop the knob at the desired position.

[0038] like Figure 1 , 2 As shown, the gear adjustment mechanism 100 of this embodiment includes a knob assembly 10 and a damping assembly 20.

[0039] The knob assembly 10 serves as an operating component for adjusting the positioning and precise, secure locking of the working head 201 in the stapler 200, where the working head 201 refers to the mechanism at the distal end of the stapler 200 that performs the cutting and suturing function. The knob assembly 10 is pivotally mounted on the housing 210 of the stapler 200, specifically in an area suitable for manual operation. The knob assembly 10 includes a knob body 11 and a steering shaft 12.

[0040] The knob body 11 is a strip-shaped component suitable for the thumb and forefinger to clamp and apply force, and it is pivotally mounted on a top cover 13 of the stapler 200.

[0041] The steering shaft 12 is used to achieve a pivotal connection between the knob body 11 and the housing 210. Specifically, the steering shaft 12 is mounted at a corresponding position in the anastomosis device 200, with one end extending through the upper cover 13 at the mounting position to be fixedly connected to the knob body 11. To achieve the connection between the steering shaft 12 and the knob body 11, the outer wall of the steering shaft 12 is engaged with the knob body 11.

[0042] like Figure 3 As shown, in one embodiment, the outer wall of the steering shaft 12 and the knob body 11 are connected and engaged by a groove 122 and a protrusion 121. That is, one of the outer wall of the steering shaft 12 and the knob body 11 is provided with a protrusion 121, and the other is provided with a groove 122 that engages with the protrusion 121. In this way, when the knob body 11 rotates, it can drive the steering shaft 12 to rotate synchronously. Furthermore, in order to prevent the steering shaft 12 and the knob body 11 from separating, the steering shaft 12 and the knob body 11 are also connected by a radial pin 123. Correspondingly, a through pin hole 124 is provided between the steering shaft 12 and the knob body 11.

[0043] A disc 125 is provided at the other end of the steering shaft 12. The steering shaft 12 and the disc 125 are coaxially and perpendicularly connected, and the steering shaft 12 and the disc 125 can be an integral part. The disc 125 further unlocks the working head 201 in the stapler 200 through the drive unit at its bottom.

[0044] Thus, when the operator rotates the knob body 11, the knob body 11 can drive the actuator in the stapler 200 to move via the steering shaft 12, thereby controlling the working head 201 to unlock, swing, and lock. The actuator referred to here can be a component that realizes the swinging and locking functions of the working head 201 in the stapler 200, and this component includes a rotating disk 203 and a locking element 204, etc.

[0045] like Figure 4 , 5 As shown, since the rotating disk 203 and locking member 204 are existing technologies, the related structures of the rotating disk 203 and locking member 204 will be described below to facilitate understanding of the technical solution of this embodiment. The rotating disk 203 has wedge-shaped grooves 205 on both sides. The width of one end 206 of the wedge-shaped groove 205 on any one side is smaller than the width of the other end 207, and one side of the wedge-shaped groove 205 is connected to the outside. The rotating disk 203 also has an assembly groove 208 located between the two wedge-shaped grooves 205.

[0046] The locking element 204 is a locking ball, which is initially located at the narrower end 206 of the wedge groove 205 to lock the rotating disk 203. The principle is that when the locking ball is engaged at the narrower end 206 of the wedge groove 205, it locks the rotating disk 203 against the inner wall of the anastomosis device 200 housing 210, thereby preventing the rotating disk 203 from rotating.

[0047] Correspondingly, the driving component 126 at the bottom of the disc 125 extends into the assembly groove 208 and has a certain gap 209 with the two side walls of the assembly groove 208. Furthermore, a cylinder 127 is provided at its bottom, extending between the locking ball and the wedge groove 205. The rotating disc 203 is further linked to two pull rods 202 via two cylindrical components 2031 at its bottom, thereby achieving a transmission connection with the working head 201 in the stapler 200.

[0048] Therefore, when the knob body 11 is rotated in the first direction, the steering shaft 12 rotates synchronously. After the steering shaft 12 rotates through the angle corresponding to the gap 209, the steering shaft 12 pushes the locking ball on one side into the wider end 207 of the wedge groove 205 through the cylinder 127 at its bottom, so as to unlock the rotating disk 203.

[0049] Because the locking ball, after entering the wider end 207, can no longer abut against the side wall of the wedge groove 205, it will not lock the rotating disk 203 in the first direction. As the steering shaft 12 continues to rotate, it can drive the rotating disk 203 to rotate further via the drive member 126. The rotating disk 203 is linked to the two tie rods 202 via the two cylindrical members 2031 at its bottom, thereby achieving a transmission connection with the working head 201 in the anastomosis device 200, so as to drive the working head 201 to adjust to the required position.

[0050] After adjustment, the locking ball, under the action of the restoring force, returns to the narrower end 206, where its friction with the wall locks the rotating disk 203. The restoring force of the locking ball can be provided by a spring, torsion spring, magnet, or a combination of these methods.

[0051] like Figure 2 As shown, the damping component 20 provides a certain damping force for the rotation of the knob assembly 10. This not only provides the operator with a good feel, but also, due to the damping force, helps the knob assembly 10 to accurately stop at the desired position, greatly reducing the difficulty of operating the stapler 200.

[0052] Specifically, the damping assembly 20 includes a sliding resistance 21 and an elastic element 22. The sliding resistance 21 is disposed between the knob assembly 10 and the housing 210, and abuts against the knob assembly 10 or the housing 210 under the action of the elastic element 22. That is, the sliding resistance 21 continuously applies pressure to the knob assembly 10 or the housing 210 under the action of the elastic element 22.

[0053] Under the direct or reaction force of this pressure, when the knob assembly 10 rotates around its pivot, the sliding member 21 can slide along the knob assembly 10 or the housing 210 and apply a damping force opposite to its rotation direction to the knob assembly 10, thereby providing the operator with a good operating feel and allowing the knob assembly 10 to be precisely stopped at the desired gear position. That is, with the assistance of the damping force, the gear adjustment of the knob assembly 10 is achieved. In one embodiment, the damping member 20 can be disposed between the outer wall of the disc 125 and the inner wall of the housing 210.

[0054] To provide sufficient damping force, a plurality of sliding elements 21 may be provided. In one embodiment, a plurality of sliding elements 21 are arranged circumferentially at equal intervals between the knob assembly 10 and the housing 210. That is, a plurality of sliding elements 21 are arranged in a circular array around the pivot of the knob assembly 10.

[0055] In one embodiment, the sliding element 21 is a spherical or cylindrical element. The spherical element can be a ball bearing, and the cylindrical element can be a roller. The elastic element 22 is a spring, specifically a columnar spring.

[0056] At this time, one end of the spring abuts against the spherical or cylindrical component, and the other end abuts against the knob assembly 10 or the housing 210. Thus, when the knob assembly 10 is stationary, the spherical or cylindrical component abuts against the knob assembly 10 or the housing 210 under the action of the spring; while the knob assembly 10 rotates, the spherical or cylindrical component, while abutting, also rolls along the knob assembly 10 or the housing 210, applying a damping force to the knob assembly 10 in the opposite direction of its rotation. That is, with the assistance of the damping force, the gear adjustment of the knob assembly 10 is achieved.

[0057] When the damping assembly 20 is disposed between the outer wall of the disc 125 and the inner wall of the housing 210, the disc 125 is provided with a plurality of cylindrical mounting grooves 1251. At this time, the spring is received in the corresponding mounting groove 1251, and the spherical or cylindrical member extends at least partially from the mounting groove 1251 and abuts against the inner wall of the housing 210 to apply a pressure to the inner wall of the housing 210, so that the knob assembly 10 will be subjected to a damping reaction force when rotated.

[0058] In summary, the gear adjustment mechanism of this embodiment can be applied to an anastomosis device. By incorporating a damping component, it provides a certain damping force for the adjustment of the knob assembly in the anastomosis device. This not only provides the operator with a good operating feel, but also, due to the damping force, helps the knob assembly to accurately stop at the desired gear position, greatly reducing the difficulty of operating the anastomosis device and facilitating gear adjustment.

[0059] Example 2

[0060] This embodiment provides a gear adjustment mechanism that can be applied to surgical instruments to assist in the indexing adjustment of the working head of the surgical instrument.

[0061] like Figure 6 As shown, the relevant content from Embodiment 1 is incorporated into this embodiment. The difference between Embodiment 2 and Embodiment 1 is that the gear adjustment mechanism 300 in this embodiment further includes a locking position 23 disposed on the knob assembly 10 or the housing 210; when the sliding member is aligned with the locking position 23, it can cooperate with the locking position 23. Thus, when the knob assembly 10 is rotated, the sliding member sequentially engages with the corresponding locking position 23, and when the knob assembly 10 continues to be rotated, under the action of external force, the sliding member can disengage from its corresponding locking position 23, thereby providing a certain degree of tactile feedback for the adjustment of the knob, thus providing a gear confirmation signal.

[0062] Furthermore, in order to achieve equal-angle indexing adjustment, it should be ensured that the rotation angle remains consistent each time. At this time, the locking positions 23 and / or the sliding resistances are at least two circumferentially equally spaced pieces, and the adjustment angle of the gear adjustment mechanism 300 is limited by the minimum angle value among the included angles between the locking positions 23 and the included angles between the sliding resistances.

[0063] Specifically, when there are at least two locking positions 23 and one sliding resistance, the locking positions 23 are arranged at equal intervals around the knob assembly 10 or the housing 210. At this time, when the knob assembly 10 is rotated, the sliding resistance can cooperate with the corresponding locking position 23 to achieve one gear adjustment each time it rotates through the angle between the locking positions 23.

[0064] When there are at least two sliding resistors and one locking position 23, the sliding resistors are arranged at equal intervals around the knob assembly 10 or the housing 210. At this time, when the knob assembly 10 is rotated, each time it rotates through the angle between the sliding resistors, the corresponding sliding resistor can engage in the locking position 23 to achieve one gear adjustment.

[0065] When there are at least two locking positions 23 and at least two sliding resistors, the locking positions 23 are arranged at equal intervals around the knob assembly 10 or the housing 210, and the sliding resistors are arranged at equal intervals around the knob assembly 10 or the housing 210. In this case, when the knob assembly 10 is rotated, each time it passes through the smallest included angle between the two, the corresponding sliding resistor can engage with the corresponding locking position 23, thus achieving one gear adjustment.

[0066] To facilitate the engagement of the sliding resistor with the locking position 23 when aligned, the locking position 23 is a groove provided on the inner wall of the housing 210, and the shape of the groove corresponds to the shape of the sliding resistor. For example, when the sliding resistor is a ball, the groove is correspondingly set as a hemispherical groove.

[0067] In summary, the gear adjustment mechanism of this embodiment, through the setting of a locking structure, enables the indexing adjustment of the knob in the stapler. That is, the knob can be rotated according to a preset angle and then stop at the corresponding indexing position. This allows for the setting of different indexing positions according to different application scenarios and operating modes, thereby achieving rapid adjustment of the stapler's gear.

[0068] Example 3

[0069] like Figure 7 As shown, this embodiment provides a surgical instrument 400, which can specifically be a stapler. The stapler includes the gear adjustment mechanisms 100 and 300 as described in Embodiment 1 or 2.

[0070] When this gear adjustment mechanism is applied to a stapler, it provides a certain damping force for adjusting the knob. This not only provides the operator with a good feel, but also, due to the damping force, helps the knob assembly to accurately stop at the desired gear, greatly reducing the difficulty of operating the stapler and facilitating gear adjustment. Thus, it overcomes the problem in existing technologies where the knob requires a high degree of force to operate and is difficult to accurately stop at the desired gear.

[0071] Furthermore, the gear adjustment mechanism, through a locking structure, allows for the graduated adjustment of the knob in the stapler. The knob can be rotated to a preset angle and then stop at the corresponding graduated position. This facilitates the setting of different graduated positions according to different application scenarios and operating modes, thereby enabling rapid adjustment of the stapler's gear.

[0072] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0073] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A range adjustment mechanism which can be applied to a surgical instrument for adjustment of a working head in the surgical instrument; characterized by, The gear adjusting mechanism comprises a knob assembly (10) and a damping assembly (20); The knob assembly (10) is pivotally mounted on the housing of the surgical instrument; The damping assembly (20) comprises sliding resistance members (21) and elastic members (22); the sliding resistance members (21) are arranged between the knob assembly (10) and the housing and abut against the knob assembly (10) or the housing under the action of the elastic members (22); When the knob assembly (10) rotates around its pivot, each sliding resistance member (21) can slide along the knob assembly (10) or the housing and apply a damping force to the knob assembly (10) in the opposite direction of the rotation direction of the knob assembly (10).

2. The range adjust mechanism of claim 1, wherein The sliding resistance members (21) are spherical members or cylindrical members, and the elastic members (22) are springs; one end of the spring abuts against the sliding resistance member (21) and the other end abuts against the knob assembly (10) or the housing.

3. The range adjust mechanism of claim 2, wherein, The knob assembly (10) is provided with a plurality of mounting grooves (1251); the elastic members (22) are accommodated in the mounting grooves (1251), and the sliding resistance members (21) at least partially extend out of the mounting grooves (1251) and abut against the inner side wall of the housing.

4. The range adjust mechanism according to any one of claims 1 to 3, characterized in that, The number of the sliding resistance members (21) is several; the several sliding resistance members (21) are arranged at equal intervals in the circumferential direction between the knob assembly (10) and the housing.

5. The range adjust mechanism of claim 1, wherein The gear adjusting mechanism further comprises a detent (23) arranged on the knob assembly (10) or the housing; when the sliding resistance member (21) is aligned with the detent (23), the sliding resistance member (21) can cooperate with the detent (23).

6. The range adjust mechanism of claim 5, wherein, The detent (23) and / or the sliding resistance member (21) are at least two circumferentially equidistant intervals; the adjustment angle of the gear adjusting mechanism is defined by the minimum angle value between the included angles of the detents (23) and the included angles of the sliding resistance members (21).

7. The range adjust mechanism according to claim 5 or 6, characterized in that, The detent (23) is a clamping groove arranged on the inner side wall of the housing, and the shape of the clamping groove corresponds to the shape of the sliding resistance member (21).

8. The range adjust mechanism of claim 1, wherein, The knob assembly (10) comprises a knob body (11) and a steering shaft (12); One end of the steering shaft (12) is fixedly connected with the knob body (11), and the other end is provided with a disc (125); the disc (125) realizes the unlocking of a working head in the surgical instrument through a driving member (126) at the bottom of the disc (125); the damping assembly (20) is arranged between the outer side wall of the disc (125) and the inner side wall of the housing.

9. The range adjust mechanism of claim 8, wherein, The outer side wall of the steering shaft (12) is connected and matched with the knob body (11), and the steering shaft (12) and the knob body (11) are further connected through a radial pin shaft (123).

10. A surgical instrument, characterized by The surgical instrument comprises the gear adjusting mechanism according to any one of claims 1-9.

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