Rotary handle assembly locking and securing structure

Abstract

The utility model provides a kind of rotary handle assembly locking fixed structure, including upper shell, lower shell and positioning ring;The front end surface of upper shell and lower shell is respectively concave with mounting groove, the mounting groove of upper shell and lower shell is connected to form the positioning groove for the positioning ring limit setting after two shell combinations, positioning ring is locked with the side end portion of upper shell and lower shell ring, the deformed positioning block that positioning ring is axially limited in positioning groove is further on positioning groove.The utility model design is reasonable, can effectively position and fix the handle shell separated by upper and lower in front end, avoid the collapse phenomenon of handle shell inner wall stress in working process, effectively improve the reliability of rotary handle assembly.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a locking and fixing structure for a rotary handle assembly. Background Technology

[0002] With the advancement of modern medicine and technology, laparoscopic surgery has become a commonly used minimally invasive procedure. Different laparoscopic surgical instruments are used to meet different surgical needs. Among these instruments, the rotary handle assembly is a tubular component used to rotate the instrument head. The hollow interior of the rotary handle houses a transmission rod or guide rod / wire. The front end of the transmission rod connects to the instrument head, and the rear end connects to the grip handle and triggering device via the rotary handle. Furthermore, to prevent intraoperative misoperation, the rotary handle assembly also needs to be equipped with locking knobs, latches, and safety sheaths to unlock when a fixed rotation angle is achieved, such as through a ratchet mechanism to enable multi-position locking and unlocking.

[0003] In the production and assembly of rotary handle assemblies, to facilitate the positioning and installation of the various internal components, the rotary handle assembly is usually designed as a split structure, such as an upper housing and a lower housing, which facilitates the positioning and installation of each component within the housing. The upper and lower housings are then connected and assembled to form the rotary handle body through methods such as plug-in, interference fit, and ultrasonic welding.

[0004] However, in actual operation, when the transmission rod drives the front instrument head to swing and the rear instrument head to move, the transmission rod assembly exerts a significant force on the circumferential inner wall of the rotary handle. Existing rotary handles with a split structure are prone to cracking of the upper and lower housings after receiving this significant impact, causing instrument damage and affecting the normal progress of the surgery. Therefore, it is necessary to further improve the design of the split-structure rotary handle assembly to ensure its stable and reliable assembly. Utility Model Content

[0005] The technical problem to be solved by this utility model is: in order to overcome the shortcomings of the prior art, this utility model provides a locking and fixing structure for a rotating handle assembly, which can effectively connect and fix the ends of the upper and lower housings, and the connection and positioning effect is stable.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a locking and fixing structure for a rotary handle assembly, including an upper shell, a lower shell, and a positioning ring; the front end faces of the upper shell and the lower shell are respectively recessed with mounting grooves, and the mounting grooves of the upper shell and the lower shell are connected after the two shells are combined to form a positioning groove for limiting the positioning ring; the positioning ring circumferentially locks the ends of the upper shell and the lower shell on this side; the positioning groove also has a deformable positioning block that axially limits the positioning ring within the positioning groove.

[0007] In the above solution, in view of the fact that the original upper and lower shells are prone to cracking during use, an installation groove is designed at the front end of the two shells. After the two shells are combined, a positioning groove is formed for the positioning ring to limit the position. The positioning ring forms a ring-like connection at the combined end of the two shells, which can fix the upper and lower shells from the end and prevent them from breaking apart under force.

[0008] Furthermore, the upper and lower shells are semi-annular structures, and the mounting groove is a semi-circular groove. The groove wall near the outer circumference of the shell is the outer groove wall, and the groove wall near the inner circumference is the inner groove wall. In the mounting groove of the upper and lower shells, deformable positioning blocks protrude from the inner groove walls at both ends of the arc of the semi-circular groove. The inner groove wall of the mounting groove has a hollow area between the inner side of the deformable positioning block and the bottom of the mounting groove. This hollow area deforms when the deformable positioning block is compressed. This deformation occurs during the operation of the positioning ring being positioned in the positioning groove. The positioning ring compresses the deformable positioning block, and the deformable positioning block deforms under the action of the hollow area, allowing the positioning ring to pass over the deformable positioning block and be positioned in the positioning groove. The deformable positioning block axially limits the positioning ring, preventing it from coming out of the positioning groove, thus effectively clamping and positioning the upper and lower shells from the ends.

[0009] Furthermore, the deformable positioning block has a convex structure, the bottom surface of which is located on the inner wall of the mounting groove and protrudes outward toward the outer wall of the groove, having an outer top surface.

[0010] Furthermore, an end plane and a guide slope are sequentially connected between the bottom surface and the outer top surface of the deformable positioning block. The guide slope provides effective guidance and force during the process of the positioning ring pressing the deformable positioning block into the positioning groove, converting the pressure into a force that compresses the deformable positioning block into the hollow area to generate deformation, thereby facilitating the installation operation of the positioning ring.

[0011] Furthermore, a guide arc surface provides a transition between the outer end face of the inner wall of the mounting groove and the groove wall surface. This guide arc surface provides alignment guidance for the positioning and engagement of the positioning ring and the positioning groove during the initial installation of the positioning ring.

[0012] Preferably, in the connection between the upper shell and the lower shell along the axial plane, a plug-in fixing method can be used: the lower end face of the upper shell is provided with a number of spaced mounting posts protruding along the axial direction of the upper shell, and the upper end face of the lower shell has mounting holes that correspond one-to-one with the mounting posts, and the mounting posts are plugged into their corresponding mounting holes.

[0013] Preferably, in the connection between the upper shell and the lower shell along the axial plane, welding is also used for fixing: the contact position between the lower end face and the upper end face of the upper shell is fixed by ultrasonic welding.

[0014] The beneficial effect of this utility model is that the locking and fixing structure of the rotary handle assembly provided by this utility model is reasonably designed and can effectively position and fix the upper and lower separated handle shells at the front end, avoiding the phenomenon of the inner wall of the handle shell breaking due to force during operation, and effectively improving the reliability of the rotary handle assembly. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the preferred embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram of the structure of the preferred embodiment of this utility model (infinite position ring).

[0018] Figure 3 yes Figure 1 Enlarged diagram of point A in the middle.

[0019] Figure 4 This is a schematic diagram of the axial plane connection between the upper and lower shells in the preferred embodiment of this utility model.

[0020] Figure 5 This is a schematic diagram of the front end of the instrument connecting rod of this utility model.

[0021] In the figure: 1. Deformation positioning block; 2. Outer groove wall; 3. Positioning ring; 4. Inner groove wall; 5. Upper shell; 6. Lower shell; 7. Guide arc surface; 8. Hollowed-out area; 9. End plane; 10. Guide slope; 11. Mounting column. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention. Therefore, they only show the components relevant to the present invention. Orientations and references (e.g., up, down, left, right, etc.) are only used to aid in the description of the features in the drawings. Therefore, the following specific embodiments are not intended to be restrictive, and the scope of the claimed subject matter is defined solely by the appended claims and their equivalents.

[0023] like Figures 1 to 4 The rotating handle assembly locking and fixing structure shown is the preferred embodiment of this utility model. This rotating handle assembly locking and fixing structure includes an upper housing 5, a lower housing 6, and a positioning ring 3. In this embodiment, the positioning ring 3 is used for positioning and fixing the front ends of the upper housing 5 and the lower housing 6. The rear ends of the upper housing 5 and the lower housing 6 can adopt the positioning groove and positioning ring 3 fixing structure described in this application, or other fixing structures can be used to cooperate with and connect to the rear-end excitation handle, etc., without further specific limitations.

[0024] Specifically, in the shell positioning connection of this embodiment, the front ends of the upper shell 5 and the lower shell 6 are semi-annular structures. To maintain balanced force distribution, they are typically arranged symmetrically, and the symmetrical plane of the upper shell 5 and the lower shell 6 is the connection and assembly surface of the two shells. The front end faces of the upper shell 5 and the lower shell 6 are respectively recessed with mounting grooves. The mounting grooves are semi-circular grooves. Among the two side walls of the mounting groove, the groove wall near the outer peripheral surface of the shell is the outer groove wall 2, and the groove wall near the inner peripheral surface of the shell is the inner groove wall 4. The mounting grooves of the upper shell 5 and the lower shell 6 are connected after the two shells are assembled to form a positioning groove for the positioning ring 3 to be limited.

[0025] like Figure 3 As shown, the positioning ring 3 circumferentially locks the upper housing 5 and the lower housing 6 at this end. The positioning groove also has deformable positioning blocks 1 that axially limit the positioning ring 3 within the positioning groove. Specifically, the deformable positioning blocks 1 protrude from the inner groove walls 4 at both ends of the arc of the semi-circular groove of the mounting groove. The inner groove wall 4 of the mounting groove has a hollow area 8 between the inner side of the deformable positioning block 1 and the bottom of the mounting groove. This hollow area 8 deforms when the deformable positioning block 1 is subjected to pressure.

[0026] There are three main problems to be solved during the installation of the positioning ring 3 into the positioning groove: 1. How to align the positioning ring 3 with the positioning groove. 2. How to ensure that the positioning ring 3 is axially positioned with the positioning groove, the upper housing 5, and the lower housing 6 after installation, and that no further axial displacement occurs.

[0027] To address issue 1, this embodiment provides a guide arc surface 7 for the transition connection between the outer end face of the inner wall 4 of the mounting groove and the groove wall surface. Utilizing the guiding and centering properties of the guide arc surface 7, it provides centering guidance for the positioning and engagement of the positioning ring 3 and the positioning groove during the initial installation of the positioning ring 3.

[0028] To address issue 2, this embodiment provides a deformable positioning block 1 protruding outward on the inner wall 4 of the mounting groove. Through the specific structure of the deformable positioning block 1 and the deformation of the deformable positioning block 1 under pressure, the installation operation of the positioning ring 3 is completed. After the deformation of the deformable positioning block 1 is restored, the axial position of the positioning ring 3 is limited so that it will not come out of the positioning groove.

[0029] Specifically, such as Figure 3As shown, the deformable positioning block 1 has a protruding structure. During production, the protruding structure and the corresponding upper shell 5 and lower shell 6 can be integrally molded using a molding mechanism, thus ensuring the integrity of the connection between the protrusion and the corresponding shell. The bottom surface of the protruding structure is located on the inner wall 4 of the mounting groove and protrudes outwards towards the outer wall 2, having an outer top surface. An end plane 9 and a guide slope 10 are sequentially connected between the bottom surface and the outer top surface of the deformable positioning block 1. The guide slope 10 provides effective guidance and force during the process of the positioning ring 3 pressing the deformable positioning block 1 into the positioning groove, converting the pressure into a force that deforms the deformable positioning block 1 towards the hollowed-out area 8, thereby facilitating the installation operation of the positioning ring 3. In the actual design, along the circumferential direction of the mounting groove, the hollowed-out area 8 extends not only from the end region of the semi-ring structure corresponding to the deformable positioning block 1 but also further inwards along the ring shape. This further enhances the compressive deformation effect of the deformable positioning block 1 and the hollow area 8, making it easier to install the positioning ring 3 and also facilitating the positioning of the deformable positioning block 1 after installation.

[0030] In the design of the positioning ring 3, its shape is limited by the shape of the positioning groove and the deformable positioning block 1. The inner radius of the positioning ring 3 matches the inner wall radius of the mounting groove, the outer radius matches the inner diameter of the outer wall of the mounting groove, and the thickness of the positioning ring 3 matches the distance between the protrusion structure and the bottom of the mounting groove. This ensures that the positioning ring 3 can be effectively installed into the positioning groove during installation. Meanwhile, the deformable positioning block 1 protrudes from the inner wall of the mounting groove, meaning that the outer diameter of the deformable positioning block 1 is larger than the inner radius of the positioning ring 3. After the positioning ring 3 is installed into the positioning groove and the deformable positioning block 1 resets, the deformable positioning block 1 axially limits the positioning ring 3 from its side, confining it within the positioning groove and effectively preventing the positioning ring 3 from falling off after installation.

[0031] The locking and fixing structure of the rotary handle assembly is rationally designed. Addressing the issue of the original upper housing 5 and lower housing 6 being prone to breakage during use, a mounting groove is designed at the front end of both housings. When the two housings are combined, they form a positioning groove for the positioning ring 3 to be positioned. A deformable positioning block 1 is designed to withstand force. The positioning ring 3 compresses the deformable positioning block 1, which deforms under the action of the hollow area 8. This allows the positioning ring 3 to pass over the deformable positioning block 1 and be positioned within the positioning groove, axially limited by the deformable positioning block 1, preventing it from coming out of the positioning groove. This effectively clamps and positions the upper housing 5 and lower housing 6 from the ends. The positioning ring 3 forms a near-clamping ring connection at the combined ends of the two housings, fixing the upper and lower housings 6 from the ends and preventing them from breaking apart under force.

[0032] In this embodiment, as Figure 4As shown, in the end connection between the upper housing 5 and the lower housing 6, the end is fixed by the above-mentioned positioning ring 3, positioning groove and deformable positioning block 1. In the connection between the upper housing 5 and the lower housing 6 along the axial plane, the connection method of plug-in fixing can be adopted, the connection method of welding fixing can be adopted, and welding can be used to strengthen the fixing after plug-in. Figure 4 The positioning ring 3 shown is for illustrative purposes only and is not intended to be used in practice.

[0033] Specifically, when the upper housing 5 and the lower housing 6 are connected by a plug-in connection, the lower end face of the upper housing 5 is provided with a number of spaced mounting posts 11 protruding along the axial direction of the upper housing 5, and the upper end face of the lower housing 6 has mounting holes that correspond one-to-one with the mounting posts 11, and the mounting posts 11 are plugged into their corresponding mounting holes.

[0034] When the upper housing 5 and the lower housing 6 are connected by welding in the axial plane, the contact position between the lower end face of the upper housing 5 and the upper end face of the lower housing 6 is fixed by ultrasonic welding.

[0035] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A locking and fixing structure for a rotary handle assembly, characterized in that: Includes an upper housing, a lower housing, and a positioning ring; The front ends of the upper and lower housings are respectively recessed with mounting grooves. The mounting grooves of the upper and lower housings are connected after the two housings are combined to form a positioning groove for the positioning ring to limit the positioning. The positioning ring locks the ends of the upper and lower housings in a circumferential manner. The positioning groove also has a deformable positioning block that limits the positioning ring axially within the positioning groove.

2. The locking and fixing structure for the rotary handle assembly as described in claim 1, characterized in that: The upper and lower shells are semi-annular structures, and the mounting groove is a semi-circular groove. The groove wall near the outer circumference of the shell is the outer groove wall, and the groove wall near the inner circumference of the shell is the inner groove wall. In the mounting groove of the upper and lower shells, the inner groove wall at both ends of the arc of the semi-circular groove is provided with a deformable positioning block. The inner groove wall of the mounting groove has a hollow area between the inner side of the deformable positioning block and the bottom of the mounting groove. The hollow area deforms when the deformable positioning block is squeezed.

3. The locking and fixing structure for the rotary handle assembly as described in claim 2, characterized in that: The deformable positioning block has a convex structure. The bottom surface of the convex structure is located on the inner wall of the mounting groove, and it protrudes outward to the outer wall of the groove, having an outer top surface. The distance between the outer top surface and the axis of the semi-circular groove of the mounting groove is greater than the inner diameter of the positioning ring.

4. The locking and fixing structure for the rotary handle assembly as described in claim 3, characterized in that: The bottom surface and the outer top surface of the deformable positioning block are connected in sequence by an end plane and a guide slope.

5. The locking and fixing structure for the rotary handle assembly as described in claim 3, characterized in that: The outer end face of the inner wall of the mounting groove is connected to the groove wall surface by a guide arc surface.

6. The locking and fixing structure for the rotary handle assembly as described in claim 1, characterized in that: The lower end face of the upper housing has a plurality of spaced mounting posts protruding along the axial direction of the upper housing, and the upper end face of the lower housing has mounting holes corresponding to the mounting posts one by one, and the mounting posts are inserted into the corresponding mounting holes.

7. The locking and fixing structure for the rotary handle assembly as described in claim 1, characterized in that: The contact position between the lower end face and the upper end face of the upper shell is fixed by ultrasonic welding.

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