Push broach structure of bipolar coagulation forceps and bipolar coagulation forceps

Abstract

The push broach structure is used for driving a cutting blade of a cutting mechanism and comprises a trigger, a connecting mechanism and a sliding block which are arranged on a support, the sliding block is connected with the support in a sliding mode and used for abutting against the end portion of one end of a cutter bar of the cutting mechanism, and the trigger is in linkage with the sliding block through the connecting mechanism. When the trigger moves relative to the support, the connecting mechanism drives the sliding block to slide relative to the support so as to push the end portion of one end of a cutter bar of the cutting mechanism, so that a cutting blade located at the other end of the cutter bar is driven to be pushed in the first direction, a bar assembly with the cutter bar can be directly detached under the condition that the sliding block is not detached, and more convenience is achieved. Meanwhile, when the trigger moves relative to the support, the connecting mechanism drives the sliding block to slide relative to the support so as to push the end portion of one end of a cutter bar of the cutting mechanism, so that a cutting blade located at the other end of the cutter bar is driven to be pushed in the first direction, and the cutter bar can be stably pushed under the condition that the sliding block and the cutter bar are not connected together; therefore, reliable cutting of tissues is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of electrosurgical instruments, and more particularly to a pusher structure of a bipolar electrocoagulation forceps and the bipolar electrocoagulation forceps. Background Art

[0002] Bipolar coagulation forceps is a commonly used hemostatic tool. The front end of the bipolar coagulation forceps is equipped with two clamp heads, which are connected to a power source respectively. When in use, the forceps are operated so that the two clamp heads come into contact with the wound. Under the action of high-frequency current, local high temperature is generated at the wound, heating the bleeding tissue to cause protein coagulation, and the blood vessel lumen becomes smaller or blocked to achieve the effect of hemostasis.

[0003] In related fields, different forceps heads may be required for different wounds or surgical sites, but the existing bipolar coagulation forceps cannot have replaced forceps heads, and multiple bipolar coagulation forceps with different forceps heads must be used, which is inconvenient to use; in addition, with the development of equipment and related processes for cleaning, disinfection, and sterilization of medical devices, bipolar coagulation forceps can meet the corresponding reuse standards after cleaning, disinfection, and sterilization.

[0004] However, the existing bipolar electrocoagulation forceps usually have a knife rod and a knife rod drive assembly connected together. Before disassembling the knife rod, the knife rod drive assembly must be removed first, or the knife rod drive assembly and the knife rod must be removed together. This makes it inconvenient to remove the rod assembly with the knife rod and other rod parts. Utility Model Content

[0005] The purpose of the utility model is to overcome the disadvantage in the prior art that it is not convenient to remove a rod assembly with rod parts such as a knife rod, and to provide a push knife structure of a bipolar coagulation forceps and a bipolar coagulation forceps.

[0006] In order to achieve the above-mentioned purpose, the technical solution provided by the present utility model is:

[0007] The utility model discloses a pusher structure of a bipolar electrocoagulation forceps, which is used to drive the cutting blade of a cutting mechanism, and comprises a trigger, a connecting mechanism and a slider arranged on a bracket. The slider is slidably connected to the bracket and is used to abut against the end of one end of the blade rod of the cutting mechanism. The trigger is linked to the slider through the connecting mechanism.

[0008] The knife-pushing structure is configured as follows: when the trigger moves relative to the bracket, the slider is driven to slide relative to the bracket through the connecting mechanism to push the end of one end of the knife rod of the cutting mechanism, thereby driving the cutting blade located at the other end of the knife rod to advance along the first direction.

[0009] As a further optimization, the trigger includes an operating part and a limiting part, the operating part is protrudingly arranged on the outside of the bracket, the limiting part is at least partially arranged inside the bracket, at least one ridge is arranged on the limiting part, and a limiting structure is arranged at a position on the bracket corresponding to the ridge.

[0010] As a further optimization, the connecting mechanism includes a connecting rod, and a connecting block is provided on the side of the operating part facing the connecting mechanism. The end of the connecting block away from the operating part is hinged to the first end of the connecting rod through a second axis, and the second end of the connecting rod is hinged to the slider.

[0011] As a further optimization, it also includes a first shaft and a trigger reset member, the connecting block is hinged to the bracket through the first shaft, the trigger reset member is arranged on the first shaft, and the two ends of the trigger reset member are respectively matched with the connecting block and the bracket.

[0012] As a further optimization, the trigger reset member is a torsion spring, and a receiving groove is provided on the connecting block. At least a portion of the torsion spring is received in the receiving groove, and the portion of the torsion spring not received in the receiving groove cooperates with the bracket.

[0013] As a further optimization, the connecting rod includes at least a first connecting rod and a second connecting rod, the first end of the first connecting rod and the first end of the second connecting rod are simultaneously hinged to the connecting block through the second axis, and the second end of the first connecting rod and the second end of the second connecting rod are respectively hinged to the two sides of the slider; when the knife rod is pushed, the first connecting rod and the second connecting rod are respectively located on both sides of the knife rod.

[0014] As a further optimization, a first hinge part and a first limit key are provided on one side of the slider, and a second hinge part and a second limit key are provided on the other side of the slider; the bracket includes a first connecting plate and a second connecting plate, a first guide groove is provided on the first connecting plate along the first direction, and a second guide groove is provided on the second connecting plate at a position corresponding to the first guide groove, the first connecting rod is connected to the first hinge part, the second connecting rod is connected to the second hinge part, the first limit key cooperates with the first guide groove, and the second limit key cooperates with the second guide groove.

[0015] The utility model provides a bipolar electrocoagulation forceps, comprising an actuator assembly, a rod assembly, a control assembly and a shell assembly, wherein the control assembly comprises a push knife structure, the rod assembly comprises a cutting mechanism, the push knife structure is used to drive the cutting mechanism, and the push knife structure is the above-mentioned push knife structure.

[0016] As a further optimization, the rod assembly also includes a clamp rod, the cutting mechanism includes a knife rod and a cutting blade, the cutting blade is connected to the end of the knife rod, the clamp rod is sleeved on the knife rod, and the knife rod is at least partially exposed and arranged with the clamp rod; the push knife structure is in transmission cooperation with the part of the knife rod exposed from the clamp rod to push the cutting blade along the first direction relative to the clamp rod.

[0017] As a further optimization, the cutting mechanism also includes a knife bar knob and a knife bar reset member. The knife bar knob is mounted on the knife bar, and the knife bar is detachably connected to the clamp rod through the knife bar knob. The knife bar reset member is arranged between the knife bar knob and the knife bar, and is used to reset the knife bar relative to the knife bar knob.

[0018] In the present invention, the slider is slidably connected to the bracket and is used to abut against the end of one end of the knife rod of the cutting mechanism, so that there is no connection relationship between the slider and the knife rod. Therefore, the rod assembly with the knife rod can be directly removed without removing the slider, which is more convenient. At the same time, when the trigger moves relative to the bracket, the slider is driven to slide relative to the bracket through the connecting mechanism to push the end of one end of the knife rod of the cutting mechanism, thereby driving the cutting blade at the other end of the knife rod to advance along the first direction. The knife rod can be stably pushed without connecting the slider to the knife rod to achieve reliable cutting of tissue. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of the bipolar electrocoagulation forceps of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the control component in the present utility model;

[0021] Figure 3 This is a schematic structural diagram of the push knife structure in the utility model;

[0022] Figure 4 This is a schematic structural diagram of the trigger, connecting mechanism and slider in the present invention;

[0023] Figure 5 It is a structural schematic diagram of the cutting mechanism in the utility model.

[0024] Explanation of the numbers in the schematic diagram: 1. Shell assembly; 2. Rod assembly; 21. Clamp rod; 22. Cutting mechanism; 221. Cutting blade; 222. Knife rod; 223. Knife rod knob; 224. Knife rod reset member; 225. Knife rod driving part; 3. Actuator assembly; 4. Control assembly; 41. Trigger; 411. Operating part; 412. Limiting part; 413. Ridge; 414. Connecting block; 415. Accommodating groove; 416. Stop block; 42. Connecting mechanism; 421. First connecting rod; 422. Second connecting rod; 423. Second shaft; 43. Slider; 431. First hinge part; 432. First limiting key; 44. First shaft; 45. Trigger reset member; 46. Bracket; 461. First connecting plate; 462. Second connecting plate; 463. First guide groove; 464. Second guide groove. DETAILED DESCRIPTION

[0025] In order to further understand the content of the present invention, the present invention is described in detail with reference to the accompanying drawings and embodiments.

[0026] Reference Figure 1 The bipolar electric pliers may include a housing assembly 1, a rod assembly 2, an actuator assembly 3, and a control assembly 4. The control assembly 4 is located within the housing assembly 1, the rod assembly 2 is at least partially located within the housing assembly 1, the actuator assembly 3 is disposed at the distal end of the rod assembly 2, that is, the end of the rod assembly 2 away from the housing assembly 1, and the actuator assembly 3 includes a clamp consisting of two clamp heads that can move relatively close to / away from each other; the portion of the rod assembly 2 located within the housing assembly 1 cooperates with the control assembly 4 to enable the clamp to be in transmission cooperation with the control assembly 4. Furthermore, a cutting mechanism 22 is also provided within the rod assembly 2, and the cutting mechanism 22 includes at least a cutting blade 221 and a knife rod 222. The cutting blade 221 is generally disposed at the distal end of the knife rod 222, and at least one of the two clamp heads of the clamp is provided with a knife groove. The knife rod 222 is in transmission cooperation with the control assembly 4, so that the cutting blade 221 can be advanced along the knife groove to cut the tissue clamped by the two clamp heads.

[0027] The pusher structure of this embodiment can be used to push the cutting blade in the cutting structure of the bipolar electric scalpel forceps to cut the tissue being treated. Figure 1 and Figure 2The knife pushing structure may include a trigger 41, a connecting mechanism 42 and a slider 43. The trigger 41, the connecting mechanism 42 and the slider 43 may be arranged on a bracket 46 of the control assembly 4. The slider 43 is slidably connected to the bracket 46. The trigger 41 is connected to the slider 43 through the connecting mechanism 42. The trigger 41 and the bracket 46 may be rotatably connected or slidably connected. The slider 43 abuts against the proximal end of the knife rod 222, that is, the end of the knife rod 222 closer to the housing assembly 1. Therefore, when the trigger 41 moves relative to the bracket 46, the slider 43 is driven to slide relative to the bracket 46 through the connecting mechanism 42. The slider 43 pushes the proximal end of the knife rod 222 by contact and abutment, thereby driving the cutting blade on the distal end of the knife rod 222 to advance along the first direction to cut the tissue clamped by the clamp. The first direction may be the axial direction of the rod assembly 2. The direction in which the knife groove on the clamp head extends is usually the first direction, or approximately the first direction.

[0028] Therefore, in this embodiment, the slider 43 is slidably connected to the bracket 46 and is used to abut against the end of one end of the knife rod 222 of the cutting mechanism 22, so that there is no connection relationship between the slider 43 and the knife rod 222. The rod assembly 2 with the knife rod 222 can be directly removed without removing the slider 43, which is more convenient. At the same time, when the trigger 41 moves relative to the bracket 46, the slider 43 is driven to slide relative to the bracket 46 through the connecting mechanism 42 to push the end of one end of the knife rod 222 of the cutting mechanism 22, thereby driving the cutting blade 221 at the other end of the knife rod 222 to advance along the first direction. The knife rod 222 can be stably pushed without connecting the slider 43 to the knife rod 222 to achieve reliable cutting of the tissue.

[0029] As a specific example of the structure of the trigger 41 in this embodiment, refer to Figure 3 The trigger 41 may include an operating portion 411 and a limiting portion 412. When the user holds the bipolar coagulation forceps, the user can drive the trigger 41 through the operating portion 411. The limiting portion 412 is used to limit the trigger 41 according to a predetermined path. More specifically, the operating portion 411 can be protruding from the outside of the bracket 46, and the housing assembly 1 is provided with an avoidance groove at a position corresponding to the operating portion 411, so that the operating portion 411 protrudes from the housing assembly 1; the limiting portion 412 is at least partially provided inside the bracket 46, and a rib 413 can be provided on the limiting portion 412. A limiting structure can be provided at a position on the bracket 46 corresponding to the rib 413. The limiting structure can be a sliding groove or a limiting protrusion. The rib 413 cooperates with the limiting structure to limit the movement path of the trigger 41.

[0030] For example, when the trigger 41 and the bracket 46 are rotatably connected, the ridge 413 can be set as an arc structure with the hinge point of the trigger 41 and the bracket 46 as the center of the circle, and the limiting structure can be two limiting protrusions set in pairs, and the two limiting protrusions are respectively located on both sides of the ridge 413 to limit the movement path of the trigger 41.

[0031] In addition, the limiting portion 412 may be provided with a stop portion, which is used to define the end point of the movement of the trigger 41, thereby preventing the trigger 41 from overtravel and damaging the knife bar 222 and the cutting blade 221. Specifically, the stop portion may be a generally diamond-shaped protrusion, with two opposing corners of the protrusion being located on either side of the ridge 413. When the protrusion contacts / interferes with the limiting protrusion on the bracket 46 during the movement of the trigger 41, the trigger 41 reaches the middle of its movement.

[0032] As an example of the connection mechanism 42, refer to Figure 4 The connecting mechanism 42 includes at least one connecting rod. A connecting block 414 may be provided on the side of the operating portion 411 of the trigger 41 facing the connecting structure. The side of the connecting block 414 away from the operating portion 411 may be hinged to the connecting rod, and the side of the connecting rod away from the operating portion 411 may be hinged to the slider 43. Specifically, the end of the connecting rod hinged to the connecting block 414 is the first end, and the end hinged to the slider 43 is the second end. The first end may be connected to the connecting block 414 via a second shaft 423, and the second end may be connected to the slider 43 via a third shaft. Alternatively, a structure similar to a shaft shoulder may be provided on the slider 43, and the second end may be sleeved on the slider 43 to achieve the hinged connection between the two.

[0033] To improve the stability of the connection, at least two connecting rods may be provided. For example, the connecting rods may include a first connecting rod 421 and a second connecting rod 422. The first end of the first connecting rod 421 and the first end of the second connecting rod 422 may be simultaneously hinged to both sides of the connecting block 414 via a second shaft 423, and the second end of the first connecting rod 421 and the second end of the second connecting rod 422 may be simultaneously hinged to both sides of the slider 43. In the bipolar electrocoagulation forceps, the knife rod 222 of the rod assembly 2 may pass through the trigger 41, and its proximal end abuts against the slider 43, so that when the knife rod 222 is pushed, the first connecting rod and the second connecting rod are respectively located on both sides of the knife rod 222.

[0034] In addition, one side of the slider 43 can be provided with a first hinge part 431 and a first limit key 432, and the other side of the slider 43 can be provided with a second hinge part and a second limit key; the bracket 46 can include a first connecting plate 461 and a second connecting plate 462, the first connecting plate 461 is provided with a first guide groove 463 along the first direction, and the second connecting plate 462 is provided with a second guide groove 464 at a position corresponding to the first guide groove 463, the first connecting rod 421 is connected to the first hinge part 431, the second connecting rod 422 is connected to the second hinge part, the first limit key 432 cooperates with the first guide groove 463, and the second limit key cooperates with the second guide groove 464.

[0035] As a further optimization, the push-blade structure further includes a trigger reset member 45 for resetting the trigger 41, which is used to keep the trigger 41 in the initial position when the user does not pull the trigger 41, thereby preventing the cutting blade from being pushed into the pliers head at the wrong time. Figure 4 The trigger reset member 45 can be a torsion spring. The connecting block 414 and the bracket 46 can be connected through the first shaft 44. The torsion spring is sleeved on the first shaft 44. One foot of the torsion spring cooperates with the bracket 46 or the housing assembly 1, and the other foot of the torsion spring can cooperate with the connecting block 414.

[0036] In addition, a receiving groove 415 can be provided on the connecting block 414, and at least a portion of the torsion spring can be accommodated in the receiving groove 415. For example, one leg of the torsion spring that cooperates with the bracket 46 or the shell assembly 1 can be exposed in the receiving groove 415, while the remaining portion is accommodated in the receiving groove 415.

[0037] Reference Figure 1 and Figure 5 The rod assembly 2 may include a clamp rod 21 and a cutting mechanism 22. The cutting mechanism 22 may include a knife bar 222 and a cutting blade 221. The cutting blade 221 may be disposed at the end of the knife bar 222, specifically the distal end of the knife bar 222, i.e., the end of the knife bar 222 away from the control assembly 4. The clamp rod 21 may be sleeved on the knife bar 222 of the cutting mechanism 22, thereby assembling into an integrated structure. The knife bar 222 is at least partially exposed and disposed with the clamp rod 21, and the knife bar 222 is capable of sliding relative to the clamp rod 21. The knife pusher structure is in transmission cooperation with the portion of the knife bar 222 exposed from the clamp rod 21, so as to push the cutting blade 221 forward in a first direction relative to the clamp rod 21. For example, a knife bar drive unit 225 may be provided at the proximal end of the knife bar 222, and the knife bar drive unit 225 abuts against the slider 43.

[0038] As a further optimization, the cutting mechanism 22 also includes a knife bar knob 223 and a knife bar reset member 224. The knife bar knob 223 is sleeved on the knife bar, and the knife bar is detachably connected to the clamp rod 21 through the knife bar knob 223. The knife bar reset member 224 is arranged between the knife bar knob 223 and the knife bar, and is used to reset the knife bar relative to the knife bar knob 223.

[0039] The above is a schematic description of the present invention and its embodiments, which is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by this and, without departing from the inventive purpose of the present invention, designs a structure and embodiment similar to the technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. A pusher structure of a bipolar electrocoagulation forceps, used to drive the cutting blade of a cutting mechanism, characterized in that: The invention comprises a trigger, a connecting mechanism and a slider provided on a bracket, wherein the slider is slidably connected to the bracket and is used to abut against the end of one end of the knife rod of the cutting mechanism, and the trigger is linked to the slider through the connecting mechanism; The knife-pushing structure is configured as follows: when the trigger moves relative to the bracket, the slider is driven to slide relative to the bracket through the connecting mechanism to push the end of one end of the knife rod of the cutting mechanism, thereby driving the cutting blade located at the other end of the knife rod to advance along the first direction.

2. The push knife structure according to claim 1, characterized in that: The trigger includes an operating part and a limiting part, the operating part is protruding from the outside of the bracket, the limiting part is at least partially arranged inside the bracket, at least one ridge is arranged on the limiting part, and a limiting structure is arranged at a position on the bracket corresponding to the ridge.

3. The push knife structure according to claim 2, characterized in that: The connecting mechanism includes a connecting rod, a connecting block is provided on the side of the operating part facing the connecting mechanism, an end of the connecting block away from the operating part is hinged to the first end of the connecting rod through a second axis, and the second end of the connecting rod is hinged to the slider.

4. The push knife structure according to claim 3, characterized in that: It also includes a first shaft and a trigger reset member. The connecting block is hinged to the bracket through the first shaft. The trigger reset member is arranged on the first shaft, and the two ends of the trigger reset member are respectively matched with the connecting block and the bracket.

5. The push knife structure according to claim 4, characterized in that: The trigger reset member is a torsion spring, and a receiving groove is provided on the connecting block. At least a portion of the torsion spring is received in the receiving groove, and the portion of the torsion spring not received in the receiving groove cooperates with the bracket.

6. The push knife structure according to claim 3, characterized in that: The connecting rod includes at least a first connecting rod and a second connecting rod, the first end of the first connecting rod and the first end of the second connecting rod are hinged to the connecting block through the second axis at the same time, and the second end of the first connecting rod and the second end of the second connecting rod are respectively hinged to the two sides of the slider; when the knife rod is pushed, the first connecting rod and the second connecting rod are respectively located on both sides of the knife rod.

7. The push knife structure according to claim 6, characterized in that: A first hinge part and a first limit key are provided on one side of the slider, and a second hinge part and a second limit key are provided on the other side of the slider; the bracket includes a first connecting plate and a second connecting plate, a first guide groove is provided on the first connecting plate along the first direction, and a second guide groove is provided on the second connecting plate at a position corresponding to the first guide groove, the first connecting rod is connected to the first hinge part, the second connecting rod is connected to the second hinge part, the first limit key cooperates with the first guide groove, and the second limit key cooperates with the second guide groove.

8. A bipolar electrocoagulation forceps, comprising an actuator assembly, a rod assembly, a control assembly, and a housing assembly, wherein the control assembly comprises a pusher structure, the rod assembly comprises a cutting mechanism, and the pusher structure is used to drive the cutting mechanism, characterized in that: The push knife structure is the push knife structure according to any one of claims 1 to 7.

9. The bipolar coagulation forceps according to claim 8, characterized in that: The rod assembly also includes a clamp rod, and the cutting mechanism includes a knife rod and a cutting blade. The cutting blade is connected to the end of the knife rod, and the clamp rod is sleeved on the knife rod, and at least a portion of the knife rod is exposed and arranged with the clamp rod; the push knife structure is in transmission cooperation with the portion of the knife rod exposed from the clamp rod to push the cutting blade forward along a first direction relative to the clamp rod.

10. The bipolar electrocoagulation forceps according to claim 9, characterized in that: The cutting mechanism also includes a knife bar knob and a knife bar reset member. The knife bar knob is sleeved on the knife bar, and the knife bar is detachably connected to the clamp rod through the knife bar knob. The knife bar reset member is arranged between the knife bar knob and the knife bar, and is used to reset the knife bar relative to the knife bar knob.

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