Extracorporeal circulation pipeline shear knife

Abstract

The utility model belongs to the field of medical instruments, and particularly discloses an extracorporeal circulation pipeline shear knife which comprises a main body, a shell and a movable plate arranged in the shell. The shearing mechanism comprises a shearing piece arranged on the movable plate and a holding piece arranged on the shell; the clamping mechanism comprises clamping pieces arranged on the two sides of the shell and pressurizing pieces arranged between the clamping pieces and the movable plate; the position of a pipeline is limited through the U-shaped groove and the inclined knife edge, the pipeline does not need to be manually held and limited, the shearing efficiency is improved, the clamping block and the spring can temporarily limit the position of the pipeline during shearing work, the pipeline at a distance in front of and behind the position to be sheared is fixed and leveled, the shearing flatness is guaranteed, and the shearing efficiency is improved. And in the shearing process, the springs are compressed, the clamping pressure of the clamping blocks is improved, the shearing flatness is further guaranteed, and the shearing quality is improved.

Description

Technical Field

[0001] The utility model belongs to the field of medical instruments, and in particular relates to a shearing knife for an extracorporeal circulation pipeline. Background Art

[0002] Extracorporeal circulation tubing is a device used to maintain blood circulation and oxygenation of patients, usually used in cardiac surgery and other situations. When using extracorporeal circulation tubing, it is sometimes necessary to cut the tubing, such as when replacing the tubing or adjusting the length of the tubing. In order to facilitate the cutting of the tubing, an extracorporeal circulation tubing cutter is required.

[0003] In a Chinese patent with publication number CN213499320U, a shearing knife for an extracorporeal circulation tubing is mentioned, comprising a handle portion and a shearing portion fixed to the handle portion; the handle portion comprises a left scissors handle and a right scissors handle, and the left scissors handle is hinged to the right scissors handle; a shearing portion comprising a shearing accommodating groove and a shearing protrusion is provided between the left scissors handle and the right scissors handle; the opening area of ​​the shearing accommodating groove is much smaller than the area of ​​the shearing protrusion; a clamping mechanism is provided in the shearing accommodating groove, and the clamping mechanism is relatively symmetrically arranged, and the shearing portion and the clamping mechanism are used to cut extracorporeal circulation tubing of different specifications; the clamping mechanism, the shock absorbing device and the rolling device are used, and a pressure dividing spring is used at the same time to cut extracorporeal circulation tubing of different specifications; the extracorporeal circulation tubing is quickly cut through the scissors blade.

[0004] However, the above-mentioned shear knife needs to open the scissors before the pipeline can be clamped in the receiving groove, and the pipeline is easily accidentally damaged by the shearing part when placing the pipeline. At the same time, it is impossible to fix and level the pipeline before and after the cutting position during cutting, and the cutting flatness is not ideal, which is inconvenient for personnel to use. Utility Model Content

[0005] The utility model aims to provide a shearing knife for an extracorporeal circulation pipeline to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] An extracorporeal circulation pipeline shearing knife comprises a main body, a shell, and a movable plate arranged in the shell; a shearing mechanism, comprising a shearing piece arranged on the movable plate, and a holding piece arranged on the shell; and a clamping mechanism, comprising clamping pieces arranged on both sides of the shell, and a booster arranged between the clamping pieces and the movable plate.

[0008] Preferably, the shearing piece includes a U-shaped groove arranged on the shell, an inclined blade is arranged on the movable plate at the front end of the U-shaped groove, a protective ring is arranged on the movable plate at the rear end of the inclined blade, and movable grooves 1 are arranged on both side surfaces of the shell.

[0009] Preferably, the movable groove 1 is adapted to the movement trajectory of the protection ring.

[0010] Preferably, the gripping member comprises a shaft rod disposed in the shell, and the shaft rod passes through the shell and is provided with a handle.

[0011] Preferably, the clamping member comprises fixing blocks arranged on both sides of the shell, the inner side of the fixing block is provided with a clamping block via a spring, the outer side of the fixing block is provided with a limiting rod, and the limiting rod passes through the fixing block.

[0012] Preferably, the booster comprises two movable grooves arranged on both sides of the shell, the fixed block at the front end of the U-shaped groove is connected to the movable plate, and the two movable grooves are adapted to the movement trajectory of the fixed block.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] (1) The utility model inserts the pipeline into the U-shaped groove so that the position to be cut coincides with the U-shaped groove. Then, a finger is inserted into the protective ring and pulled, and the pipeline can be cut by the inclined blade. The U-shaped groove will limit the position of the pipeline. The inclined blade will generate a downward oblique thrust on the pipeline during the cutting process, thereby limiting the position of the pipeline. There is no need to manually hold the pipeline to limit it, thereby improving the cutting efficiency.

[0015] (2) The utility model can temporarily limit the position of the pipeline during shearing by means of the clamping block and the spring, and fix and level the pipeline at a distance before and after the position to be sheared to ensure shearing flatness. During the shearing process, the spring will be compressed to increase the clamping pressure of the clamping block, further ensuring shearing flatness and improving shearing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a side view of the utility model;

[0018] Figure 3 It is a schematic diagram of the internal structure of the utility model;

[0019] Figure 4 It is a schematic diagram of the storage state structure of the utility model.

[0020] In the figure: 1. Main body; 2. Shearing mechanism; 3. Clamping mechanism;

[0021] 101. housing; 102. movable plate;

[0022] 201, movable groove 1; 202, protective ring; 203, U-shaped groove; 204, inclined blade; 205, shaft; 206, handle;

[0023] 301, fixed block; 302, clamping block; 303, limiting rod; 304, spring; 305, movable slot 2. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] As attached Figure 1 To Attachment Figure 4 As shown:

[0026] Embodiment 1: The utility model provides an extracorporeal circulation pipeline shear knife, comprising a main body 1, including a shell 101, and a movable plate 102 arranged in the shell 101; a shearing mechanism 2, including a shearing piece arranged on the movable plate 102, and a holding piece arranged on the shell 101; and a clamping mechanism 3, including clamping pieces arranged on both sides of the shell 101, and a booster piece arranged between the clamping pieces and the movable plate 102.

[0027] Specifically, the shearing piece includes a U-shaped groove 203 arranged on the shell 101, an inclined blade 204 is arranged on the movable plate 102 at the front end of the U-shaped groove 203, a protective ring 202 is arranged on the movable plate 102 at the rear end of the inclined blade 204, and a movable groove 201 is arranged on the surface of both sides of the shell 101. The staff can install a reset spring between the groove at the rear end of the movable plate 102 and the shell 101 to automatically reset after one shearing is completed, so as to facilitate the staff to perform shearing work again.

[0028] Furthermore, the movable groove 1 201 is adapted to the movement trajectory of the protection ring 202 .

[0029] Furthermore, the gripping member includes a shaft 205 disposed in the housing 101 , and the shaft 205 penetrates through the housing 101 and is provided with a handle 206 .

[0030] As can be seen from the above, when in use, the handle 206 is pushed to rotate around the shaft 205 as the center of the circle, staggered with the shell 101, so that it is convenient for people to hold the device, and then the external circulation pipeline to be cut is inserted into the U-shaped groove 203, and the U-shaped groove 203 temporarily limits the position of the pipeline, and then the finger is inserted into the protective ring 202 and pulled back to drive the movable plate 102 to move synchronously, and then the pipeline is cut through the inclined blade 204. During the cutting process, the inclined blade 204 will generate a downward oblique thrust on the pipeline, thereby limiting it in the U-shaped groove 20 3, the stability during the shearing process is improved, the shearing is fast, there is no need to manually fix the pipeline, and the work efficiency is improved. After the shearing work is completed, the protective ring 202 can be pushed in the initial direction to hide the inclined blade 204 into the shell 101, and then the handle 206 is pushed to overlap with the shell 101 to shield the position of the protective ring 202 to avoid the inclined blade 204 being exposed when not in use to cause accidental injury, thereby improving the safety of the device, while reducing the occupied area of ​​the device and improving the flexibility and portability of the device.

[0031] Embodiment 2: This embodiment is basically the same as the previous embodiment, except that the clamping member includes a fixing block 301 arranged on both sides of the shell 101, a clamping block 302 is installed on the inner side of the fixing block 301 through a spring 304, a limiting rod 303 is installed on the outer side of the fixing block 301, and the limiting rod 303 passes through the fixing block 301.

[0032] Specifically, the booster includes a second movable groove 305 disposed on both sides of the housing 101 , a fixed block 301 at the front end of the U-shaped groove 203 is connected to the movable plate 102 , and the second movable groove 305 is adapted to the motion trajectory of the fixed block 301 .

[0033] As can be seen from the above, when the pipeline is clamped in the U-shaped groove 203, the parts of the pipeline located at both ends of the position to be sheared will be simultaneously clamped between the clamping blocks 302, and the spring 304 will press the clamping block 302 onto the pipeline through its own elasticity, further improving the stability of the pipeline. At the same time, the pipeline can be fixed and flat to avoid the pipeline from bending due to the squeezing of the inclined blade 204 during the shearing process, resulting in uneven shearing. During the movement of the movable plate 102, the fixed block 301 will be driven to move synchronously, and the spring 304 will be tightened synchronously due to the shortening of the distance between the fixed block 301 and the clamping block 302, thereby increasing the driving force on the clamping block 302, improving the clamping force of the clamping block 302 on the pipeline, further ensuring the flatness of the shearing end, and facilitating personnel use.

[0034] The standard parts used in this utility model can be purchased from the market, and the special-shaped parts can be customized according to the description and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0035] In the description of the present utility model, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. The meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0036] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0038] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless there is a contradiction.

[0039] In the drawings of the embodiments disclosed by the present invention, only the structures involved in the embodiments disclosed by the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0040] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. An extracorporeal circulation tubing shearing knife, characterized in that: include, The main body (1) comprises a shell (101) and a movable plate (102) arranged in the shell (101); A shearing mechanism (2) comprising a shearing piece arranged on the movable plate (102) and a holding piece arranged on the housing (101); and, A clamping mechanism (3) comprising clamping members arranged on both sides of the housing (101), and a pressurizing member arranged between the clamping members and the movable plate (102); The shearing piece comprises a U-shaped groove (203) arranged on the shell (101), an inclined blade (204) is arranged on the movable plate (102) at the front end of the U-shaped groove (203), a protective ring (202) is arranged on the movable plate (102) at the rear end of the inclined blade (204), and movable grooves (201) are arranged on both side surfaces of the shell (101); The clamping member comprises a fixing block (301) arranged on both sides of the housing (101), a clamping block (302) is installed on the inner side of the fixing block (301) via a spring (304), a limiting rod (303) is installed on the outer side of the fixing block (301), and the limiting rod (303) passes through the fixing block (301).

2. The extracorporeal circulation tubing shearing knife according to claim 1, characterized in that: The movable groove 1 (201) is adapted to the movement trajectory of the protection ring (202).

3. The extracorporeal circulation tubing shearing knife according to claim 1, characterized in that: The gripping member comprises a shaft (205) disposed in the housing (101); the shaft (205) passes through the housing (101) and is provided with a grip (206).

4. The extracorporeal circulation tubing shearing knife according to claim 1, characterized in that: The booster comprises a second movable groove (305) arranged on both sides of the shell (101), a fixed block (301) at the front end of the U-shaped groove (203) is connected to the movable plate (102), and the second movable groove (305) is adapted to the movement trajectory of the fixed block (301).

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