Simplified and reliable riveting rotating structure for medical instrument

Abstract

The utility model relates to the technical field of medical instruments, and discloses a simplified and reliable riveting rotating structure for a medical instrument, which comprises a first part and a second part which are rotationally connected with each other, a cylindrical step is concavely formed on an end platform of the first part, a circular cylinder is convexly formed on an end platform of the second part, and the first part and the second part are fixedly connected with each other. The circular column casing rotatably extends into the cylindrical step; a stopping step is formed on the side wall of the cylindrical step in a sunken mode, a turnup is formed at the end, stretching into the cylindrical step, of the cylindrical barrel, and the turnup is riveted with the stopping step. The riveting rotation structure disclosed by the utility model is simplified into two components, and the two components are riveted after being sleeved together, so that the step of interference fit is not needed, laser welding is not needed, the defects of complex structure or poor performance and high reject ratio are avoided, and the production efficiency is improved. And the device has the advantages of reliable rotation performance, high assembly efficiency, stable product quality and low cost.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a simplified and reliable riveting and rotating structure for medical devices. Background Art

[0002] An endoscope is a detection instrument used clinically. It can enter the stomach through the oral cavity or enter the body through other natural orifices, and uses optical and electrical signal image processing to examine lesions. For example, a doctor can observe ulcers or tumors in the stomach with the help of an endoscope, and can also place treatment instruments, such as sampling forceps, foreign body forceps, etc., through the endoscope channel. When the sampling forceps are placed into the human body, the handle of the sampling forceps can be operated to sample or treat the lesion site.

[0003] The existing endoscope sampling forceps have forceps petals and a rotating structure for connecting the sampling forceps main body and the forceps petals. The handle of the sampling forceps controls the opening and closing of the forceps petals through the internally installed steel wire. At the same time, the handle can also control the rotating structure of the forceps petals, and drive the forceps petals to rotate 360 degrees forward and backward at any angle through the rotating structure for sampling.

[0004] There are generally two types of existing rotating structures;

[0005] One is composed of three components, namely a forceps head bracket connected to the forceps petals, a bracket seat connected to the sampling forceps main body, and a connecting rotating shaft for rotatably connecting the forceps head bracket and the bracket seat. The defect of this structure is that there are many types of parts and the structure is relatively complex, resulting in a long operation time for cleaning and disinfection. In addition, the assembly time is long and laser welding is required, which also leads to a high cost;

[0006] The other is composed of two components, namely a forceps head bracket connected to the forceps petals and a bracket seat connected to the sampling forceps main body. The forceps head bracket and the bracket seat are assembled by interference fit through the protrusions and stepped openings formed on them. Burrs will be generated when the protrusion steps are assembled, which will affect the rotation performance of the product and increase the rejection rate, indirectly increasing the cost. Content of the Utility Model

[0007] The utility model aims to solve at least one of the technical problems existing in the prior art. For this reason, an object of the utility model is to provide a simplified and reliable riveting and rotating structure for medical devices.

[0008] A simplified and reliable riveting and rotating structure for medical devices according to the utility model.

[0009] In some examples of the utility model, the riveting and rotating structure includes a first component and a second component that are rotatably connected to each other. When the riveting and rotating structure is applied to a rotating sampling forceps or a rotating foreign body forceps, the first component and the second component respectively correspond to the forceps head bracket and the bracket seat;

[0010] Different from traditional technical solutions, in this riveting and rotating structure, a cylindrical step is formed by depression on the end platform of the first component, and a circular cylinder is formed by protrusion on the end platform of the second component. The circular cylinder can rotatably extend into the cylindrical step. At the same time, a stop step is formed by depression on the side wall of the cylindrical step, and a flanging is formed at one end of the circular cylinder extending into the cylindrical step. The flanging is riveted to the stop step with a gap that can rotate 360 degrees at any angle.

[0011] The advantage of such a design is that the rotating structure is simplified into two components, and the connection between the two components is riveted after being sleeved together, without the step of interference fit and without laser welding, avoiding the defects of complex structure, poor performance and high rejection rate, and having the advantages of reliable rotating performance, high assembly efficiency, stable product quality and low cost.

[0012] In some examples of the present utility model, a groove is formed by depression on the outer wall surface or inner wall surface of the circular cylinder corresponding to the flanging. The purpose of this groove is to reduce the thickness of the circular cylinder at the flanging, so as to ensure the strength of the circular cylinder itself while reducing the thickness of the flanging to assist the forming operation of the flanging.

[0013] In some examples of the present utility model, a number of stress grooves are formed by depression at the end of the circular cylinder extending into the cylindrical step. The number of stress grooves is distributed along the circumferential direction of the circular cylinder. The stress grooves can eliminate the stress brought to the circular cylinder during the forming operation of the flanging and prevent the circular cylinder from deforming.

[0014] In some examples of the present utility model, a first shoulder is formed at the connection between the cylindrical step and the end platform of the first component, and a second shoulder is formed at the connection between the circular cylinder and the end platform of the second component. The first shoulder and the second shoulder are in mutual abutment. The purpose of such a design is that the first shoulder and the second shoulder are in abutment to prevent circumferential movement between the first component and the second component.

[0015] In some examples of the present utility model, the first shoulder and the cylindrical step are connected by a first slope surface, which forms an avoidance effect on the connection between the circular cylinder and the second shoulder, reduces collision and friction, and prevents locking between the first component and the second component.

[0016] In some examples of the present utility model, the side wall of the cylindrical step and the stop step are connected by a second slope surface. The second slope surface forms an avoidance effect on the forming operation of the flanging and prevents locking between the flanging and the stop step at the same time.

[0017] In some examples of the present utility model, an installation groove is formed by depression at one end of the first component away from the cylindrical step. The installation groove extends to connect with the stop step, so that the stop step is exposed in the installation groove.

[0018] The "stopping step is exposed in the installation groove" here is interpreted as: the inner diameter of the installation groove is larger than the inner diameter of the stopping step, so that the tool can extend through the installation groove to the stopping step to perform a flanging operation on the circular cylinder.

[0019] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is the front view of the riveting rotation structure in Embodiment 1 of the present utility model;

[0022] Figure 2 It is the cross-sectional view of the riveting rotation structure in Embodiment 1 of the present utility model;

[0023] Figure 3 It is the cross-sectional view of the first component and the second component before riveting in Embodiment 1 of the present utility model;

[0024] Figure 4 It is the cross-sectional view of the second component in Embodiment 2 of the present utility model;

[0025] Figure 5 It is the cross-sectional view of the second component in Embodiment 3 of the present utility model;

[0026] Figure 6 It is the cross-sectional view of the second component in Embodiment 4 of the present utility model.

[0027] Explanation of the Reference Numerals in the Drawings:

[0028] The first component 1, the cylindrical step 11, the stopping step 12, the first shoulder 13, the first slope 14, the second slope 15, the installation groove 16;

[0029] The second component 2, the circular cylinder 21, the flanging 22, the groove bodies 23a, 23b, the second shoulder 24, the stress grooves 25a, 25b. Detailed Embodiments

[0030] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0031] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0032] In the description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, the terms "installation", "connection" and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model may be understood according to specific circumstances.

[0033] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0034] Embodiment 1: This Embodiment 1 provides a simplified and reliable riveting and rotating structure for medical devices, and this rotating structure is applied to a sampling forceps.

[0035] Figure 1 is the front view of this riveting and rotating structure;

[0036] Figure 2It is a cross-sectional view of the riveting and rotating structure;

[0037] Figure 3 It is a cross-sectional view of the first component and the second component of the riveting and rotating structure before riveting.

[0038] Next, refer to Figures 1 to 3 to describe the riveting and rotating structure provided in Embodiment 1 of the present invention.

[0039] Specifically, please refer to Figure 1 , the riveting and rotating structure includes a first component 1 and a second component 2 that are rotatably connected to each other. The first component 1 is a bracket seat connected to the main body of the sampling pliers. It is generally cylindrical. One end is used to connect the second component 2, and the other end is used to connect the main body of the sampling pliers. The second component 2 is a pliers head bracket connected to the pliers lobe of the sampling pliers. It is generally cylindrical. One end is used to connect to the first component 1, and the other end is provided with a pin hole for connecting the pliers lobe.

[0040] Please refer to Figure 2 , a cylindrical step 11 is formed by recessing on the end platform 11 of the first component 1. A circular cylindrical barrel 21 is formed by protruding on the end platform 21 of the second component 2. The inner cavity of the circular cylindrical barrel 21 is communicated with the inner cavity of the second component 2. The communicated inner cavity is for the steel wire to pass through, and one end of the steel wire is connected to the pliers lobe, so that the pliers lobe can be controlled by the handle at the other end of the steel wire. The circular cylindrical barrel 21 can rotatably extend into the cylindrical step 11;

[0041] Please refer to Figure 3 , a stop step 12 is formed by recessing on the side wall of the cylindrical step 11, that is, the stop step 12 is opened in the circumferential direction pointing to the cylindrical step 11. The stop step 12 surrounds the side wall of the cylindrical step 11 for one week to form an annular groove. A flanging 22 is formed at one end of the circular cylindrical barrel 21 extending into the cylindrical step 11. The flanging 22 also surrounds the circular cylindrical barrel 21 for one week to form an annular flanging 22. The flanging 22 is riveted to the stop step 12, Figure 2 shows a schematic diagram of the flanging 22 before forming.

[0042] Please continue to refer to Figure 2 , a groove body is formed by recessing on the inner wall surface of the circular cylindrical barrel 21 corresponding to the flanging 22. This groove body is denoted as groove body 23a. One end of the groove body 23a extends to the end of the circular cylindrical barrel 21. Its purpose is to reduce the thickness of the flanging 22 to ensure the deformation amount at the flanging 22, and further ensure the riveting of the flanging 22 to the stop step 12.

[0043] Please continue to refer to Figure 2, a first shoulder 13 is formed at the connection between the cylindrical step 11 and the end platform 11 of the first component 1. The first shoulder 13 is the annular end face formed at the connection between the cylindrical step 11 and the end platform 11. A second shoulder 24 is formed at the connection between the circular cylindrical barrel 21 and the end platform 21 of the second component 2. The second shoulder 24 is the annular end face formed at the connection between the circular cylindrical barrel 21 and the end platform 21. The first shoulder 13 and the second shoulder 24 are in mutual abutment, that is, the two annular end faces are in mutual abutment, preventing the first component 1 and the second component 2 from moving axially.

[0044] Please continue to refer to Figure 2 , the first shoulder 13 and the cylindrical step 11 are connected by a first slope 14, and the first slope 14 is an annular slope.

[0045] Please continue to refer to Figure 2 , the side wall of the cylindrical step 11 and the stop step 12 are connected by a second slope 15, and the slope of the second slope 15 fits the slope of the flanging 22 to form an avoidance for the forming operation of the flanging 22.

[0046] Please continue to refer to Figure 2 , a mounting groove 16 is formed by recessing at one end of the first component 1 away from the cylindrical step 11. The mounting groove 16 is also a circular cylindrical groove. The mounting groove 16 extends to connect with the stop step 12, exposing the stop step 12 in the mounting groove 16, that is, the diameter of the mounting groove 16 > the diameter of the stop step 12 > the diameter of the cylindrical step 11. The device can perform a forming operation on the flanging 22 at the stop step 12 through the mounting groove 16.

[0047] Embodiment 2: Embodiment 2 of the present invention provides another simplified and reliable riveting and rotating structure for medical devices, and this rotating structure is also applied in a sampling forceps.

[0048] Figure 4 is a cross-sectional view of the second component;

[0049] Next, refer to Figure 4 to describe the riveting and rotating structure provided by Embodiment 2 of the present invention.

[0050] Specifically, as Figure 4 , compared with the riveting and rotating structure in Embodiment 1, the rest of the structure of the riveting and rotating structure in Embodiment 2 is the same, and the difference is that: four stress grooves are formed by recessing at the end of the circular cylindrical barrel 21 extending into the cylindrical step 11, denoted as stress grooves 25a. The stress grooves 25a extend to the other end of the circular cylindrical barrel 21, and the four stress grooves 25a are distributed along the circumferential direction of the circular cylindrical barrel 21. In other embodiments, the number of stress grooves 25a can be two, three or more.

[0051] Embodiment 3: Embodiment 3 provides another simplified and reliable riveting and rotating structure for medical devices, and this rotating structure is also applied to a sampling forceps.

[0052] Figure 5 It is a cross-sectional view of the second component;

[0053] Next, refer to Figure 5 to describe the riveting and rotating structure provided by Embodiment 3 of the present utility model.

[0054] Specifically, as Figure 5 shown, compared with the riveting and rotating structure in Embodiment 1, the other structures of the riveting and rotating structure in Embodiment 3 are the same, and the difference lies in that: a groove is formed by recessing on the outer wall surface of the circular column cylinder 21 corresponding to the flanging 22, and this groove is denoted as groove 23b. One end of the groove 23b extends to the end of the circular column cylinder 21.

[0055] Embodiment 4: Embodiment 4 provides another simplified and reliable riveting and rotating structure for medical devices, and this rotating structure is also applied to a sampling forceps.

[0056] Figure 6 It is a cross-sectional view of the second component;

[0057] Next, refer to Figure 6 to describe the riveting and rotating structure provided by Embodiment 4 of the present utility model.

[0058] Specifically, as Figure 6 shown, compared with the riveting and rotating structure in Embodiment 3, the other structures of the riveting and rotating structure in Embodiment 4 are the same, and the difference lies in that: four stress grooves are formed by recessing at the end of the circular column cylinder 21 extending into the cylindrical step 11, denoted as stress grooves 25b. The stress grooves 25b extend to the other end of the circular column cylinder 21, and the four stress grooves 25b are distributed along the circumferential direction of the circular column cylinder 21. In other embodiments, the number of stress grooves 25a can be two, three or more.

[0059] The other components of the sampling forceps according to the embodiments of the present utility model are known to those of ordinary skill in the art and will not be described in detail here.

[0060] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples" or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0061] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A simplified and reliable riveting and rotating structure for a medical device, comprising a first component and a second component that are rotatably connected to each other; Characterized in that: The first component is formed with a cylindrical step recessed on its end platform, and the second component is formed with a circular cylinder protruding on its end platform, and the circular cylinder can rotatably extend into the cylindrical step; A stop step is recessed on the side wall of the cylindrical step, and a flange is formed at one end of the circular cylinder extending into the cylindrical step, and the flange is riveted to the stop step.

2. The simplified and reliable riveting and rotating structure for a medical device according to claim 1, characterized in that, A groove is recessed on the outer wall surface or inner wall surface of the circular cylinder corresponding to the flange.

3. A simplified and reliable riveting and rotating structure for a medical device according to claim 2, characterized in that, A plurality of stress grooves are recessed at the end of the circular cylinder extending into the cylindrical step, and the plurality of stress grooves are circumferentially distributed along the circular cylinder.

4. A simplified and reliable riveting and rotating structure for a medical device according to any one of claims 1 to 3, characterized in that, A first shoulder is formed at the connection between the cylindrical step and the end platform of the first component, and a second shoulder is formed at the connection between the circular cylinder and the end platform of the second component, and the first shoulder and the second shoulder are in mutual abutment.

5. A simplified and reliable riveting and rotating structure for a medical device according to claim 4, wherein the first shoulder and the cylindrical step are connected by a first slope surface.

6. A simplified and reliable riveting and rotating structure for a medical device according to any one of claims 1 to 3, wherein the side wall of the cylindrical step and the stop step are connected by a second slope surface.

7. A simplified and reliable riveting and rotating structure for a medical device according to any one of claims 1 to 3, wherein an installation groove is recessed at one end of the first component away from the cylindrical step, and the installation groove extends to connect with the stop step, so that the stop step is exposed in the installation groove.

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