Knob assembly and anastomat

Abstract

The utility model discloses a knob assembly which comprises a knob (601) installed on a shell (501) of an anastomat, and is characterized in that the knob assembly further comprises a knob base (602) and a knob positioner (603), the knob base (602) is installed at the lower end of the knob (601), the knob positioner (603) which is a certain distance away from the axis of the knob base (602) is installed on the bottom surface of the knob base (602), and the knob positioner (603) is installed on the bottom surface of the knob base (602). A steering support (202) of the transmission device is arranged at the lower end of the knob base (602), and the upper end face of the steering support (202) is in small clearance fit with the knob base (602), so that the steering support (202) is limited in the circumferential direction. The design of the knob assembly effectively prevents the knob from rotating mistakenly, and the structural stability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a knob assembly for a laparoscope stapler. Background Art

[0002] Minimally invasive surgery has developed rapidly in my country in recent years, and laparoscopic staplers play an important role in this field. During minimally invasive abdominal surgery, laparoscopic staplers with more sophisticated performance and structure are needed to achieve tissue cutting and suturing.

[0003] During surgery, the tissue to be cut or sutured may not be directly in front of the stapler's cartridge structure, necessitating the stapler's cartridge structure to bend at a certain angle to achieve precise cutting and suturing. The current proven solution involves using a control knob that drives the cartridge structure to bend to the desired angle.

[0004] If the tissue that needs to be cut and sutured is in the front, the stapler structure is in the axial direction of the stapler. However, due to the disadvantages of the bending structure, when the stapler structure is in the axial direction of the stapler, the force of the bending structure on the stapler structure is minimal, resulting in an unstable stapler structure and a phenomenon of small left and right angle shaking. The stapler structure cannot accurately clamp the tissue.

[0005] Therefore, it is urgent to develop a knob assembly with better performance. This patent introduces a knob assembly for a laparoscopic stapler. Utility Model Content

[0006] The technical problem to be solved by the utility model is to solve the technical problem in the prior art that the knob assembly causes the nail magazine structure to be unstable and shake at an angle.

[0007] In order to solve the above technical problems, the technical solutions provided by the present invention are as follows:

[0008] A knob assembly comprises a knob (601), wherein the knob (601) is mounted on a housing (501) of a stapler, and is characterized in that it further comprises a knob base (602) and a knob positioner (603), wherein the knob base (602) is mounted on the lower end of the knob (601), and the knob positioner (603) is mounted on the bottom surface of the knob base (602) at a certain distance from the axis of the knob base (602), and the lower end of the knob base (602) is a steering bracket (202) of the stapler transmission assembly, and the upper end surface of the steering bracket (202) is fitted with a small gap with the knob base (602), so that the steering bracket (202) is limited in the circumferential direction.

[0009] Furthermore, a travel positioning block (2023) is provided on the upper end surface of the steering bracket (202), a travel groove (20231) is provided on the travel positioning block (2023), and the knob positioner (603) installed on the knob base (602) is installed in the travel groove (20231).

[0010] Furthermore, when the knob (601) and the housing are in the same direction, the steering bracket (202) is in the middle position of the travel;

[0011] When the knob (601) is rotated 90° clockwise, the steering bracket (202) moves to the proximal end position of the stroke;

[0012] When the knob (601) is rotated 90° counterclockwise, the steering bracket (202) moves to the far end position of the stroke.

[0013] Furthermore, the rotating assembly further comprises a stop sleeve (604), a stopper (605) and a stop spring (606), wherein the stop spring (606) is sleeved on the rod body (6052) of the stopper (605) and then inserted into the stop sleeve (604) together.

[0014] Furthermore, the stop sleeve (604) is provided with a stop pillar (6041), and the stop pillar (6041) is installed in the stopper installation groove (5019) of the housing (501).

[0015] Furthermore, a positioning groove (6021) is provided on the side wall of the knob base (602), and a stop tip (6051) is provided at the end of the stopper (605). When the knob assembly is in the initial zero position, the stop tip (6051) is inserted into the positioning groove (6021).

[0016] A stapler, characterized by comprising any one of the knob assemblies described above.

[0017] After adopting such a design, the utility model has at least the following advantages:

[0018] (1) The knob of the utility model has high transmission efficiency and effectively converts rotational motion into axial motion.

[0019] (2) The zero-position positioning structure of the present invention effectively prevents the knob from rotating accidentally and improves the structural stability.

[0020] (3) The utility model has a simple structure, good effect, low cost and easy process implementation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0022] Figure 1 It is a schematic diagram of the zero position analysis of the housing and knob assembly of one embodiment of the utility model;

[0023] Figure 2 This is a non-zero position sectional diagram of the housing and knob assembly of one embodiment of the present invention;

[0024] Figure 3 This is a schematic structural diagram of a knob 601 according to an embodiment of the present invention;

[0025] Figure 4 This is a structural diagram of a knob base 602 according to an embodiment of the present invention;

[0026] Figure 5 This is a structural diagram of a knob positioner 603 according to an embodiment of the present invention;

[0027] Figure 6 This is a schematic structural diagram of a steering bracket 202 according to an embodiment of the present invention;

[0028] Figure 7 This is a partial structural diagram of the housing 501 according to an embodiment of the present invention;

[0029] Figure 8 This is a schematic structural diagram of a stop sleeve 604 according to an embodiment of the present invention;

[0030] Figure 9 This is a schematic structural diagram of a stopper 605 according to an embodiment of the present invention;

[0031] Reference numerals,

[0032] Housing 501, knob 601, knob base 602, knob locator 603, stop sleeve 604, stopper 605, stop spring 606, steering bracket 202, travel positioning block 2023, travel slot 20231, positioning slot 6021, stop pillar 6041, limiting slot 6042, transmission cavity 6043, stop tip 6051, rod body 6052, stopper mounting slot 5019, positioning rib 50110; DETAILED DESCRIPTION

[0033] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] In this document, “upper”, “lower”, etc. are only used to indicate the relative position relationship between related parts, rather than to limit the absolute positions of these related parts.

[0035] The end of each component closer to the operator is defined as the proximal end, and the end farther from the operator is defined as the distal end. The expressions proximal end and distal end are only used to simplify and clarify the description and should not be construed as any limitation to the present invention.

[0036] like Figure 1-9 As shown, the knob assembly of one embodiment of the present invention includes a knob 601, which is mounted on the housing 501 of the stapler. The knob assembly also includes a knob base 602 and a knob locator 603. The knob base 602 is mounted on the lower end of the knob 601. The knob locator 603 is mounted on the bottom surface of the knob base 602 at a certain distance from the axis of the knob base 602.

[0037] The lower end of the knob base 602 is the steering bracket 202 of the transmission device. The upper end surface of the steering bracket 202 is matched with the knob base 602 with a small gap, so that the steering bracket 202 is limited in the circumferential direction.

[0038] The certain distance here is the distance between the knob locator 603 and the axis of the knob base 602. This distance determines the axial movement distance of the steering bracket 202 of the stapler when the knob 601 is rotated to the maximum angle, i.e. 90°. The movement distance of the steering bracket 202 must ensure that the stapler can bend to the maximum bending angle.

[0039] Specifically, a mounting hole is provided on the lower end surface of the knob base 602 for installing the knob locator 603. The installation position of the knob locator 603 is a certain distance away from the axis of the knob base 602. The lower end of the knob base 602 is the steering bracket 202 of the transmission device. The upper end surface of the steering bracket 202 is provided with a travel positioning block 2023. The travel positioning block 2023 has a travel groove 20231. The other end of the knob locator 603 installed on the knob base 602 is installed in the travel groove 20231 of the travel positioning block 2023.

[0040] When the direction of the knob 601 is the same as that of the housing, the knob locator 603 is inserted into the stroke slot 20231 of the steering bracket 202, so that the steering bracket 202 is in the middle position of the axial forward and backward movement stroke. At this time, the knob locator 603 is at a distance from the axis, that is, it is in an eccentric position; when the knob 601 is rotated 90°, the knob locator 603 can be moved from the lateral eccentric position to the axial eccentric position. The knob locator 603 moves the distance of the eccentric radius in the axial direction. Since the knob locator 603 is in the stroke slot 20231, it drives the steering bracket 202 to move the distance of the eccentric radius in the axial direction. When the knob 601 is rotated clockwise, the steering bracket 202 moves backward to the proximal end position. When the knob 601 is rotated counterclockwise, the steering bracket 202 moves forward to the distal end position.

[0041] Here, knob locator 603 is inserted into travel slot 20231 of steering bracket 202. Knob locator 603 is located eccentrically with respect to the axis of knob 601. When knob 601 is rotated 90°, the distance of knob locator 603 relative to knob base 602 changes in the axial and radial directions. This can be understood as the Y-axis and X-axis. The distance of axial or radial movement is the size of the eccentric radius. Because steering bracket 202 has travel slot 20231, knob locator 603 is constrained to move within travel slot 20231. The radial movement distance is made room for by travel slot 20231, resulting in axial movement of steering bracket 202.

[0042] When the knob 601 is in the same direction as the housing, the steering bracket 202 is driven by the knob positioner 603 and is in the middle position of the stroke. The knob 601 rotates 90° clockwise. The steering bracket 202 is driven by the knob positioner 603 and moves axially to the proximal end position of the stroke. The knob 601 rotates 90° counterclockwise. The steering bracket 202 is driven by the knob positioner 603 and moves axially to the distal end position of the stroke.

[0043] The knob assembly further includes a stop sleeve 604 , a stopper 605 , and a stop spring 606 .

[0044] The stop sleeve 604 is provided with a stop support 6041, which is installed in the stopper installation groove 5019 of the housing 501. The stopper installation groove 5019 is used to install the stopper 605 that cooperates with the knob. There are positioning ribs 50110 on both sides of the stopper installation groove 5019. Figure 7 As shown, the position of the stopper installation groove 5019 is the side wall, and the positioning rib 50110 cooperates with the limiting groove 6042 on the stop sleeve 604 to further tighten the stop sleeve 604. Here, the limiting groove 6042 is also on both sides.

[0045] The rod body 6052 of the stopper 605 is covered with a stop spring 606 and inserted into the transmission cavity 6043 of the stop sleeve 604. A positioning groove 6021 is provided on the side wall of the knob base 602. The end of the stopper 605 is a stop tip 6051. When the knob assembly is in the initial zero position, the stop tip 6051 is inserted into the positioning groove 6021 of the knob base 602. The knob assembly will not rotate easily without applying force, preventing accidental touch. In addition, a certain force feel is provided for the switching of the initial zero position.

[0046] When the knob assembly 6 is in a non-initial zero position, the stop tip 6051 presses against the annular surface of the knob base 602 outside the positioning groove 6021. At this time, the surface knob rotates a certain angle and leaves the zero position.

[0047] The present invention also discloses a stapler comprising any of the above knob assemblies. With such a design, the present invention has at least the following advantages:

[0048] (1) The knob design of the utility model has high transmission efficiency and effectively converts rotational motion into axial motion.

[0049] (2) The zero-position positioning structure of the present invention effectively prevents the knob from rotating accidentally and improves the structural stability.

[0050] (3) The utility model has a simple structure, good effect, low cost and easy process implementation.

[0051] Those skilled in the art will readily conceive of other embodiments of the present invention after considering the utility model disclosed in the specification and examples. This application is intended to cover any variations, uses, or adaptations of the present invention that adhere to the general principles of the present invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered merely as exemplary; the true scope and spirit of the present invention are indicated by the following claims.

[0052] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A knob assembly, comprising a knob (601), wherein the knob (601) is mounted on a housing (501) of a stapler, and wherein: It also includes a knob base (602) and a knob locator (603), wherein the knob base (602) is mounted on the lower end of the knob (601), and a knob locator (603) is mounted on the bottom surface of the knob base (602) at a certain distance from the axis of the knob base (602), and the lower end of the knob base (602) is a steering bracket (202) of the stapler transmission assembly, and the upper end surface of the steering bracket (202) is fitted with a small gap with the knob base (602), so that the steering bracket (202) is limited in the circumferential direction.

2. The knob assembly according to claim 1, wherein: The upper end surface of the steering bracket (202) is provided with a travel positioning block (2023), the travel positioning block (2023) is provided with a travel groove (20231), and the knob positioner (603) mounted on the knob base (602) is mounted in the travel groove (20231).

3. The knob assembly according to claim 2, wherein: When the knob (601) and the housing are in the same direction, the steering bracket (202) is in the middle position of the travel; When the knob (601) is rotated 90° clockwise, the steering bracket (202) moves to the proximal end position of the stroke; When the knob (601) is rotated 90° counterclockwise, the steering bracket (202) moves to the far end position of the stroke.

4. The knob assembly according to claim 3, wherein: The knob assembly further comprises a stop sleeve (604), a stopper (605) and a stop spring (606), wherein the stop spring (606) is sleeved on the rod body (6052) of the stopper (605) and then inserted into the stop sleeve (604) together.

5. The knob assembly according to claim 4, wherein: The stop sleeve (604) is provided with a stop pillar (6041), and the stop pillar (6041) is installed in a stopper installation groove (5019) provided in the housing (501).

6. The knob assembly according to claim 5, wherein: The side wall of the knob base (602) is provided with a positioning groove (6021), and the end of the stopper (605) is provided with a stop tip (6051). When the knob assembly is in an initial zero position, the stop tip (6051) is inserted into the positioning groove (6021).

7. A stapler, characterized in that: The utility model comprises the knob assembly as described in any one of claims 1 to 6.

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