An angle-adjustable clip applier

Abstract

The application relates to the technical field of clip appliers, and discloses an angle-adjustable clip applier which comprises a clip applier body, a resilient sheet and a connecting head fixed relative to a clamp head, the resilient sheet is installed on the connecting head, a connecting part of the clip applier body is used for connecting a handle and the connecting head, a bimetallic sheet is embedded in the connecting head, and one end of the bimetallic sheet is provided with a cutting groove. The angle-adjustable clip applier, after the bimetallic sheet is electrified, current passing through the bimetallic sheet generates heat, the temperature of the bimetallic sheet is increased, and the bimetallic sheet is bent, the angle adjustment of the clamp head is realized, the heat generated by the bimetallic sheet after being electrified can be accurately controlled through a temperature control device, the bending degree of the bimetallic sheet is accurately controlled, the angle of the clamp head relative to the handle is finally accurately adjusted, the bimetallic sheet is divided at the slotted part through the setting of the cutting groove, the end of the bimetallic sheet close to the clamp head can more freely deform, and therefore the response sensitivity to temperature change is improved.

Description

Technical Field

[0001] This application relates to the field of clamping pliers technology, specifically an angle-adjustable clamping pliers. Background Technology

[0002] Clip forceps are widely used instruments in medical surgery, primarily for clamping and placing clips to perform operations such as clamping, fixing, or separating tissues, blood vessels, and other structures. The forceps head typically consists of two opposing jaws for grasping and holding the clip. The forceps head has a special shape or texture to better secure the clip or prevent it from slipping during operation. The forceps handle is the handheld part, usually designed with an ergonomic shape for easy gripping and operation by the surgeon. The handle may also be equipped with various control devices, such as springs, buttons, or latches, to control the opening and closing of the forceps head and the release of the clips. The forceps connection... The connecting part is used to connect the clamp head and the clamp handle, allowing the clamp head to open and close under the control of the clamp handle. The connecting part usually has a certain degree of flexibility and strength to ensure the stability and accuracy of the clamp during operation. During surgery, when it is necessary to cut blood vessels, the clamp can clamp the blood vessels to stop blood flow and achieve hemostasis. This is very important for reducing surgical bleeding, maintaining a clear surgical field, and avoiding complications such as postoperative bleeding. It can also be used to clamp and fix tissues to facilitate doctors to perform cutting, suturing, or other operations. For example, in gastrointestinal surgery, the clamp can be used to fix the intestinal tract to facilitate anastomosis.

[0003] Traditional clamps have a fixed clamp head angle that is difficult to adjust. When performing surgeries on complex anatomical structures, such as deep pelvic areas or areas around the heart and major blood vessels where the vessels are narrow and their course is variable, it is difficult to fit the target tissue at an ideal angle, resulting in clamp position deviation and a greater risk of clamp dislodgement. Utility Model Content

[0004] To address the shortcomings of existing technologies, this application provides an angle-adjustable clamp, which has the advantages of flexible adjustment of the clamp head angle and small size, saving space and solving the problem of fixed clamp head angle that is difficult to adjust.

[0005] To achieve the above objectives, this application provides the following technical solution: an angle-adjustable clamp, including a clamp body, an elastic plate, and a connector fixed relative to the clamp head. The elastic plate is mounted on the connector head. The connecting part of the clamp body is used to connect the clamp handle and the connector head. A bimetallic strip is embedded in the connector head, and one end of the bimetallic strip is provided with a cutting groove.

[0006] The clamp body has a conductor installed inside. One end of the conductor is connected to the positive terminal of the external power supply, and the other end is connected to the negative terminal of the external power supply. The conductor and the bimetallic strip form a series circuit. When energized, the bimetallic strip bends.

[0007] The above method allows for bending of the bimetallic strip by applying electricity and heating it, thus enabling adjustment of the angle between the pliers head and the pliers handle.

[0008] Furthermore, the bimetallic sheet includes an upper metal sheet and a lower metal sheet, which are bonded together by a rolling process. The expansion coefficient of the upper metal sheet is greater than that of the lower metal sheet, which is closer to the elastic sheet.

[0009] With the above method, the temperature of the bimetallic strip increases after being energized, and the bimetallic strip will bend towards the side closer to the bimetallic strip.

[0010] Furthermore, the fixed end of the elastic sheet is fixed to one end of the connector, while its movable end contacts the other end of the connector.

[0011] With the above solution, when the bimetallic strip bends, the elastic sheet needs to adapt to the deformation caused by the external force through its own elastic deformation, so that the elastic sheet has a certain displacement and angle change space, which can ensure that the elastic sheet can effectively play the role of resetting the connector under different working postures.

[0012] Furthermore, the connector is made of rubber.

[0013] The above solution is used to support and protect the bimetallic strip while accommodating its bending.

[0014] Furthermore, the part connecting the connector to the pliers head is a rigid structure, while the rest is a flexible structure.

[0015] The above method allows for deformation under stress, enabling flexible bending.

[0016] Furthermore, the conductor is connected to an external temperature control device via a wire circuit to control the heat generated by the bimetallic strip when energized.

[0017] The above method allows for control of the degree of bending of the bimetallic strip, thereby precisely adjusting the angle between the pliers head and the pliers handle.

[0018] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0019] This adjustable clamp utilizes a bimetallic strip. When energized, the current flowing through the bimetallic strip generates heat, causing it to heat up and bend, thus adjusting the angle of the clamp head. A temperature control device precisely controls the heat generated by the energized bimetallic strip, thereby precisely controlling the degree of bending and ultimately adjusting the angle between the clamp head and the handle. When the bimetallic strip expands due to heat, internal stress is generated. The cutting groove divides the bimetallic strip at the slot, reducing its overall rigidity and internal stress. When the temperature changes, the end of the bimetallic strip closer to the clamp head can deform more freely, producing significant bending with smaller temperature changes, thereby improving the sensitivity to temperature variations. Attached Figure Description

[0020] Figure 1 This is a diagram illustrating the overall structure of this application;

[0021] Figure 2 This is a schematic diagram of the pliers head after adjustment.

[0022] Figure 3 For this application Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0023] Figure 4 This is a sectional view of the top view of the clamp body of this application;

[0024] Figure 5 This is a schematic diagram of the structure of the bimetallic strip after bending in this application;

[0025] Figure 6 This is a cross-sectional view of the bimetallic strip after bending.

[0026] In the picture:

[0027] 1. Clamping pliers body; 101. Clamping handle; 102. Connecting part; 103. Clamping head; 2. Connecting head; 3. Bimetallic strip; 301. Upper metal strip; 302. Lower metal strip; 4. Cutting groove; 5. Conductor; 6. Wire circuit; 7. Elastic sheet. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 An angle-adjustable clamp in this embodiment includes a clamp body 1, a spring sheet fixedly installed between two clamp handles 101 of the clamp body 1, an elastic sheet 7, and a connector 2 fixed relative to the clamp head 103. The elastic sheet 7 is installed on the connector 2. The connecting part 102 of the clamp body 1 is used to connect the clamp handles 101 and the connector 2. A bimetallic strip 3 is embedded in the connector 2. One end of the bimetallic strip 3 is provided with a cutting groove 4.

[0030] The clamp body 1 has a conductor 5 installed inside. One end of the conductor 5 can be connected to the positive terminal of an external power source through a wire, and the other end can be connected to the negative terminal of an external power source through a wire. The conductor 5 and the bimetallic strip 3 form a series circuit. When energized, the bimetallic strip 3 bends.

[0031] Please see Figure 4 , Figure 5 and Figure 6 The bimetallic sheet 3 includes an upper metal sheet 301 and a lower metal sheet 302. The upper metal sheet 301 can be made of copper, and the lower metal sheet 302 can be made of nickel. The upper metal sheet 301 and the lower metal sheet 302 are bonded together by a rolling process. The expansion coefficient of the upper metal sheet 301 is greater than that of the lower metal sheet 302 which is closer to the elastic sheet 7. When the bimetallic sheet 3 is energized, its temperature rises and the bimetallic sheet 3 will bend towards the side closer to the elastic sheet 7.

[0032] Please see Figure 2 and Figure 3 The fixed end of the elastic sheet 7 is fixed to one end of the connector 2, and its movable end is in contact with the other end of the connector 2. When the bimetallic sheet 3 bends, the elastic sheet 7 needs to adapt to the deformation of the external force through its own elastic deformation, so that the elastic sheet 7 has a certain displacement and angle change space, which can ensure that the elastic sheet 7 can effectively play the role of resetting the connector 2 under different working postures.

[0033] Please see Figure 1 , Figure 2 and Figure 3 The connector 2 is made of rubber and is used to support and protect the bimetallic strip 3, while also accommodating the bending of the bimetallic strip 3. The part of the connector 2 connected to the pliers head 103 is a rigid structure with strong support and fixing performance, while the rest is a flexible structure that can deform under force and achieve flexible bending.

[0034] Please see Figure 1 and Figure 2 The conductor 5 is connected to an external temperature control device via a wire circuit 6 to control the heat generated by the bimetallic strip 3 when energized, thereby controlling the degree of bending of the bimetallic strip 3 to precisely adjust the angle of the pliers head 103 relative to the pliers handle.

[0035] In this embodiment, an angle-adjustable clamp is provided. When the bimetallic strip 3 is energized, the current passing through the bimetallic strip 3 generates heat, causing the temperature of the bimetallic strip 3 to rise and bend, thereby adjusting the angle of the clamp head 103. Furthermore, the heat generated by the energized bimetallic strip 3 can be precisely controlled by a temperature control device, thereby precisely controlling the degree of bending and ultimately precisely adjusting the angle of the clamp head 103 relative to the clamp handle.

[0036] It should be noted that when the bimetallic strip 3 expands due to heat, internal stress will be generated. The cutting groove 4 divides the bimetallic strip 3 at the groove, reducing the overall rigidity and internal stress of the bimetallic strip 3. When the temperature changes, the end of the bimetallic strip 3 near the clamp head 103 can deform more freely, and a significant bending can be produced with a smaller temperature change, thereby improving the response sensitivity to temperature changes.

[0037] It should be noted that after setting the cutting groove 4, the bimetallic sheet 3 can deform without a high temperature. This is because the cutting groove 4 reduces the internal stress of the bimetallic sheet 3, allowing the bimetallic sheet 3 to bend and deform more freely due to the difference in the thermal expansion coefficients of the two metals when the temperature changes. This reduces the temperature conditions required for deformation and also saves energy.

[0038] The working principle of the above embodiment is as follows: First, the elastic sheet 7 is installed on the connector 2. A bimetallic strip 3 with a cutting groove 4 at one end is embedded in the connector 2. The conductor 5 is installed inside the clamp body 1 and connected in series with the bimetallic strip 3, and is connected to an external temperature control device through the wire circuit 6. When it is working, the current flows through the series circuit composed of the conductor 5 and the bimetallic strip 3. The bimetallic strip 3 heats up due to the current heating effect. Since the thermal expansion coefficient of the upper copper metal sheet is greater than that of the lower nickel metal sheet, the difference in the degree of expansion of the two tightly bonded metal sheets causes the bimetallic strip 3 to bend towards the side closer to the lower metal sheet 302. The presence of the cutting groove 4 reduces internal stress and improves bending sensitivity. It should be noted that when the bimetallic strip 3 is heated and expands or cooled and contracts, stress will be generated at the interface between the two metal sheets due to the difference in thermal expansion coefficients between the upper metal sheet 301 (e.g., copper) and the lower metal sheet 302 (e.g., nickel). Without the cutting groove 4, this stress... Stress will accumulate throughout the bimetallic sheet 3, especially at the edges and joints, where stress concentration is likely to occur. The presence of the cutting groove 4 is equivalent to creating some weak areas on the bimetallic sheet 3. When the bimetallic sheet 3 undergoes thermal deformation, these cutting grooves 4 can serve as channels for stress release, allowing the stress originally concentrated in certain areas to be dispersed through the slight deformation of the cutting groove 4. For example, when the temperature rises and the upper metal sheet 301 expands more than the lower metal sheet 302, the metal at the cutting groove 4 can bend and deform more easily, thereby alleviating the overall stress level and avoiding damage or performance degradation of the metal sheet caused by excessive stress concentration.

[0039] Next, when the bimetallic strip 3 bends, it exerts a force on the connector 2, causing the elastic plate 7 to deform elastically, providing itself with space for displacement and angle changes. During the bending process of the bimetallic strip 3, it adapts to the changes and plays a role in restoring the connector 2. The connector 2 is made of rubber; the part connected to the clamp head 103 is a rigid structure, while the rest is a flexible structure. This structure can both securely connect the clamp head 103 and support and protect the bimetallic strip 3, adapting to its bending and transmitting the bending action to the clamp head 103. Simultaneously, the external temperature control device precisely controls the current magnitude and energizing time of the conductor 5 and the bimetallic strip 3, controlling the heat generated by the bimetallic strip 3, thereby precisely controlling its bending degree. Ultimately, this achieves flexible and precise adjustment of the angle between the clamp head 103 and the clamp handle, meeting the needs of different working scenarios. It should be noted that the external temperature control device changes the current flowing through the conductor 5 and the bimetallic strip 3 by adjusting the output voltage or current. The greater the current and the longer the energizing time, the more heat is generated by the bimetallic strip 3. The device can set specific current values ​​and energizing times to precisely control heat generation. The degree of bending of the bimetallic strip 3 is related to the amount of heat generated; different amounts of heat result in different degrees of bending. This allows for precise control of the degree of bending of the bimetallic strip 3, thereby adjusting the angle of the clamp head 103. Adjusting the angle of the clamp head 103 allows the clamp to accurately adapt to the tissue position and shape in different operating scenarios. For example, it can more flexibly clamp and handle tissues in different locations during surgery. It also facilitates operation in confined spaces, improving operational convenience and accuracy, reducing unnecessary damage to surrounding tissues, and improving operational efficiency and safety.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0041] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An angle-adjustable clamp, comprising a clamp body (1), characterized in that: It also includes an elastic sheet (7) and a connector (2) fixed relative to the clamp head (103). The elastic sheet (7) is installed on the connector (2). The connecting part (102) of the clamp body (1) is used to connect the clamp handle (101) and the connector (2). A bimetallic strip (3) is embedded in the connector (2). One end of the bimetallic strip (3) is provided with a cutting groove (4). The clamp body (1) is equipped with a conductor (5). One end of the conductor (5) is connected to the positive terminal of the external power supply, and the other end is connected to the negative terminal of the external power supply. The conductor (5) and the bimetallic strip (3) form a series circuit. When energized, the bimetallic strip (3) bends.

2. The angle-adjustable clamp according to claim 1, characterized in that: The bimetallic sheet (3) includes an upper metal sheet (301) and a lower metal sheet (302). The upper metal sheet (301) and the lower metal sheet (302) are bonded together by a rolling process. The expansion coefficient of the upper metal sheet (301) is greater than that of the lower metal sheet (302) which is closer to the elastic sheet (7).

3. An angle-adjustable clamp according to claim 1 or 2, characterized in that: The fixed end of the elastic sheet (7) is fixed to one end of the connector (2), and its movable end is in contact with the other end of the connector (2).

4. An angle-adjustable clamp according to claim 1 or 3, characterized in that: The connector (2) is made of rubber.

5. An angle-adjustable clamp according to claim 1 or 4, characterized in that: The part where the connector (2) is connected to the clamp head (103) is a rigid structure, while the rest is a flexible structure.

6. An angle-adjustable clamp according to any one of claims 1-5, characterized in that: The conductor (5) is connected to an external temperature control device via a wire circuit (6) to control the heat generated by the bimetallic strip (3) when it is energized.

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