A concealed excitation mechanism and a clamp with the same mechanism

Abstract

This invention relates to a concealed firing mechanism and a clamp incorporating the same mechanism. The concealed firing mechanism includes a fixed handle and a firing handle. A pivot shaft extending laterally is fixed inside the fixed handle. The middle part of the firing handle is fitted onto the pivot shaft and can rotate around it. The upper end of the firing handle has a firing part. A limiting member that cooperates with the firing handle is located inside the fixed handle. The firing handle has a mounting cavity containing a two-stage firing assembly. A pressing port is provided on the firing handle corresponding to the mounting cavity. Pressing the firing handle causes it to rotate around the pivot shaft until it is blocked by the limiting member, at which point the firing part completes its initial firing. Pressing the second-stage firing assembly releases the limiting member from the firing handle and causes the firing part to fire again. The concealed firing mechanism is installed inside the clamp. This invention has a simple structure, is easy to operate, and can achieve two-stage firing of the clamp jaws, offering good safety and accuracy.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, specifically a concealed excitation mechanical structure and a clamp with the structure. Background Technology

[0002] During surgical procedures, to fully expose the surgical field, it is necessary to ligate ruptured blood vessels and other lumens within the incision to stop bleeding. Clamping forceps are surgical instruments used to perform clamping operations, utilizing tissue clamps to ligate blood vessels and other lumens.

[0003] There are two main types of clip applicators: single-shot and multi-shot. Single-shot clip applicators have a simple structure, but require repeated installation during use, making the operation relatively cumbersome. Multi-shot clip applicators have a number of tissue clips pre-loaded inside the clamp bar, allowing for continuous clipping during surgery, making them more convenient to use.

[0004] However, conventional automatic firing clamps do not have a "two-stage firing" mechanism, making it difficult for users to quickly and accurately press the firing lever to the middle position. Furthermore, the feel and force of firing are difficult to control, which can easily lead to clamping failure. Utility Model Content

[0005] The purpose of this invention is to provide a concealed firing mechanism and a clamping pliers with the same mechanism. The mechanism is simple in structure and easy to operate. It can achieve two-stage firing of the clamping jaws and has good safety and accuracy.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] A concealed triggering mechanism includes a fixed handle and a firing handle. The fixed handle has a pivot shaft extending to the left and right inside it. The middle part of the firing handle is sleeved on the pivot shaft and can rotate around the pivot shaft.

[0008] The upper end of the firing handle has a firing part, and the fixed handle is provided with a limiting member that cooperates with the firing handle.

[0009] The firing handle has a mounting cavity, and a two-stage firing assembly is provided in the mounting cavity. A pressing port is provided on the firing handle corresponding to the mounting cavity.

[0010] Press the firing handle to rotate it around the pivot shaft until the firing handle is blocked by the limiting part, at which point the two-stage firing assembly is exposed and the firing part completes the first firing.

[0011] Pressing the two-stage firing assembly releases the firing handle from the limiting member and drives the firing part to fire again.

[0012] A clamp containing the aforementioned concealed excitation mechanism further includes clamp jaws;

[0013] The upper part of the fixed handle is provided with a sliding channel extending back and forth. A push post is slidably arranged in the sliding channel. The clamping jaws are connected to the front end of the push post and cause the push post to retract backward. The firing part abuts against the rear side of the push post.

[0014] When the firing part fires for the first time, the push column is fired to the first position in the sliding channel, thereby putting the clamping jaws into the pre-clamping state;

[0015] When the firing unit fires again, the two-stage firing assembly drives the firing unit to fire the push column further, thereby causing the clamping jaws to perform clamping.

[0016] Compared with the prior art, the advantages of this utility model are:

[0017] 1. By setting a two-stage firing assembly, specifically, the elastic ribs and limiting ribs of the two-stage firing assembly accurately limit the firing stroke of the push column, so that the clamping jaws are restricted to the pre-clamping position. Then, by pressing the firing button, the elastic ribs and the limiting groove form a transmission engagement, so that the firing part further fires and pushes the column forward, thereby causing the clamping jaws to perform clamping, which improves the safety and accuracy of the clamping process. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram showing the connection between the firing handle and the two-stage firing assembly;

[0020] Figure 3 This is a diagram showing the clamping jaws entering the pre-clamping state.

[0021] Figure 4 This is a simplified diagram illustrating the two-stage firing button.

[0022] Figure 5 This is a schematic diagram of the engagement of the step and the gear.

[0023] Labeling Explanation: 1 Fixed Handle, 10 Sliding Channel, 11 Engaging Groove, 12 Step, 2 Firing Handle, 20 Mounting Cavity, 21 Firing Part, 22 Pressing Port, 23 Limiting Groove, 24 Pulley, 3 Pivot Shaft, 4 Push Column, 5 Two-Stage Firing Assembly, 51 Firing Button, 52 Elastic Deformation Part, 53 Elastic Rib, 54 Arc-Shaped Guide Rail, 6 Limiting Rib, 7 Pin Shaft. Detailed Implementation

[0024] The present invention will now be described in detail with reference to the accompanying drawings and embodiments:

[0025] like Figure 1-5 The diagram shown is a schematic representation of an embodiment of a concealed excitation mechanism provided by this utility model:

[0026] A concealed triggering mechanism includes a fixed handle 1 and a firing handle 2. The fixed handle 1 has a pivot shaft 3 extending to the left and right inside it. The middle part of the firing handle 2 is sleeved on the pivot shaft 3 and can rotate around the pivot shaft 3.

[0027] The upper end of the firing handle 2 has a firing part 21, and the fixed handle 1 is provided with a limiting member that cooperates with the firing handle 2.

[0028] The firing handle 2 has a mounting cavity 20, and a two-stage firing assembly 5 is provided in the mounting cavity 20. A pressing port 22 is provided on the firing handle 2 corresponding to the mounting cavity 20.

[0029] Press the firing handle 2 to rotate it around the pivot shaft 3 until the firing handle 2 is blocked by the limiting member, the second firing assembly 5 is exposed at the pressing port 22, and the firing part 21 completes the first firing.

[0030] Pressing the two-stage firing assembly 5 releases the firing handle 2 from the limiting member and drives the firing part 21 to fire again.

[0031] Furthermore, a concealed excitation mechanism is used in conjunction with a clamp to form a clamp with a concealed excitation mechanism; including clamp jaws;

[0032] The fixed handle 1 has a sliding channel 10 extending forward and backward on its upper part. A push post 4 is slidably arranged in the sliding channel 10. The clamping jaws are connected to the front end of the push post 4 and cause the push post 4 to retract backward. The firing part 21 abuts against the rear side of the push post 4.

[0033] When the firing part 21 fires for the first time, the pushing column 4 is fired to the first position in the sliding channel 10, thereby putting the clamping jaws into the pre-clamping state;

[0034] When the firing unit 21 fires again, the two-stage firing assembly 5 drives the firing unit 21 to further fire the push column 4, thereby causing the clamping jaws to perform clamping.

[0035] The clamping jaws of the clamping pliers are existing technology, and the clamping jaws always apply a backward retracting force to the push post 4. During the operation, pressing the firing handle 2 causes the firing part 21 to overcome the retracting force applied by the clamping jaws, causing the push post 4 to move forward. When the firing handle 2 releases its force, it is driven to reset by the retracting force of the clamping jaws.

[0036] The two-stage firing assembly 5 includes a firing button 51, an elastic deformation part 52 located on the lower rear side of the firing button 51, and an elastic rib 53 located on the top of the firing button 51.

[0037] The firing button 51 is assembled in the mounting cavity 20, and the elastic deformation part 52 abuts against the front side of the pivot shaft 3, so that the firing button 51 can rotate around the pivot shaft 3 after being pressed, and can be driven to reset after the force is released.

[0038] The top of the firing handle 2 has a limiting groove 23, and the elastic rib 53 moves within the limiting groove 23. When the elastic rib 53 rotates with the firing button 51, the elastic rib 53 passes over the limiting member and engages with the front side wall of the limiting groove 23, causing the firing part 21 to fire again.

[0039] The limiting member is a limiting rib 6, which is located above the limiting groove 23, and the elastic rib 53 abuts against the limiting rib 6.

[0040] Press the firing handle 2 until the limiting rib 6, the elastic rib 53, and the rear sidewall of the limiting groove 23 abut against each other from front to back. The firing part 21 completes the initial firing, and the firing button 51 exposes the pressing port 22. The firing part 21 fires the pushing column 4 to the first position within the sliding channel 10, and the clamping jaws enter the pre-clamping state.

[0041] It should be specifically noted that the operator can determine whether the limit stop rib 6, elastic rib 53 and limit groove 23 are in sequence by the pressing feel of the firing handle 2 and the extent to which the firing button 51 is exposed at the pressing port 22.

[0042] The firing handle 2 is fixed with a left-right extending pin 7, and the upper rear side of the firing button 51 is provided with an arc-shaped guide rail 54. The arc-shaped guide rail 54 is sleeved on the outside of the pin 7 and is guided and cooperated with the pin 7.

[0043] The firing button 51, the elastic deformation part 52, the elastic rib 53, and the arc-shaped guide rail 54 are integrally molded.

[0044] The fixed handle 1 has a meshing groove 11, and the inner wall of the meshing groove 11 has several steps 12 along its length. The rear side of the firing handle 2 has a pry bar 24 that can engage with the steps 12 step by step. Through the step-by-step engagement of the pry bar 24 with the steps 12 step by step, a graded pressing feel can be formed when pressing the firing handle 2, thereby providing operational feedback to the practitioner so that the practitioner can better control the force and rhythm of operation and improve the reliability of the operation.

[0045] The general usage of this utility model is as follows:

[0046] First, the operator aligns the clamping jaws with the area to be clamped, then presses the firing handle 2. The firing handle 2 rotates around the pivot 3, causing the firing part 21 to overcome the retraction force exerted by the clamping jaws on the push column 4, thereby firing the push column 4 forward. When the push column 4 is fired to the first position in the sliding channel 10, the limiting rib 6, the elastic rib 53, and the rear side wall of the limiting groove 23 abut against each other from front to back, and the clamping jaws enter the pre-clamping state.

[0047] In the pre-clamping state, the firing button 51 exposes the pressing port 22. The operator presses the firing button 51, causing the elastic rib 53 at its top to pass over the limiting rib 6 and engage with the front side wall of the limiting groove 23, thereby driving the firing part 21 to further fire the pushing column 4. The pushing column 4 continues to move forward, thereby causing the clamping jaws to perform the clamping action.

[0048] When the firing button 22 is depressurized, the rebound force of the elastic deformation part 52 resets the firing button 22. Specifically, the rebound force of the elastic deformation part 52 is sufficient to cause the elastic rib 53 to pass over the limit stop rib 6. When the firing handle 2 is depressurized, the retraction force applied by the clamping jaws to the push post 4 drives the firing handle 2 to reset.

[0049] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A concealed firing mechanism, comprising a fixed handle (1) and a firing handle (2), wherein the fixed handle (1) is internally provided with a pivot shaft (3) extending laterally, and the middle part of the firing handle (2) is sleeved on the pivot shaft (3) and can rotate around the pivot shaft (3), characterized in that: The upper end of the firing handle (2) has a firing part (21), and the fixed handle (1) is provided with a limiting member that cooperates with the firing handle (2) for limiting. The firing handle (2) is provided with a mounting cavity (20), and a two-stage firing assembly (5) is provided in the mounting cavity (20). A pressing port (22) is provided on the firing handle (2) corresponding to the mounting cavity (20). Press the firing handle (2) to rotate it around the pivot shaft (3) until the firing handle (2) is blocked by the limiting member, the two-stage firing assembly (5) is exposed at the pressing port (22), and the firing part (21) completes the first firing; Pressing the two-stage firing assembly (5) releases the obstruction between the firing handle (2) and the limiting member, and drives the firing part (21) to fire again.

2. The concealed activation mechanical structure according to claim 1, wherein: The two-stage firing assembly (5) includes a firing button (51), an elastic deformation part (52) located on the lower rear side of the firing button (51), and an elastic rib (53) located on the top of the firing button (51). The firing button (51) is assembled in the mounting cavity (20), and the elastic deformation part (52) abuts against the front side of the pivot shaft (3), so that the firing button (51) can rotate around the pivot shaft (3) after being pressed, and can be driven to reset after the force is released; The top of the firing handle (2) has a limiting groove (23). The elastic rib (53) moves within the limiting groove (23). When the elastic rib (53) rotates with the firing button (51), the elastic rib (53) passes over the limiting member and engages with the front side wall of the limiting groove (23) to fire the firing part (21) again.

3. The concealed activation mechanical structure according to claim 2, wherein: The limiting member is a limiting rib (6), the limiting rib (6) is located above the limiting groove (23), and the elastic rib (53) abuts against the limiting rib (6); Press the firing handle (2) until the rear sidewalls of the limiting stop rib (6), elastic rib (53) and limiting groove (23) abut against each other from front to back, the firing part (21) completes the first firing, and the firing button (51) exposes the pressing port (22).

4. The concealed excitation mechanical structure according to claim 2, characterized in that: The firing handle (2) is fixed with a pin (7) extending to the left and right. The upper rear side of the firing button (51) is provided with an arc-shaped guide rail (54). The arc-shaped guide rail (54) is sleeved on the outside of the pin (7) and is guided and cooperated with the pin (7).

5. The concealed excitation mechanical structure according to claim 4, characterized in that: The firing button (51), elastic deformation part (52), elastic rib (53) and arc-shaped guide rail (54) are integrally molded.

6. The concealed excitation mechanical structure according to claim 2, characterized in that: The fixed handle (1) has a meshing groove (11), and the inner wall of the meshing groove (11) has several steps (12) along its length. The firing handle (2) has a prying tooth (24) on its rear side that can cooperate with the steps (12) step by step.

7. A clamp containing the concealed excitation mechanism as described in any one of claims 1 to 6, characterized in that: It also includes the clamping jaws; The fixed handle (1) has a sliding channel (10) extending forward and backward on the upper part. A push column (4) is slidably arranged in the sliding channel (10). The clamping jaws are connected to the front end of the push column (4) and cause the push column (4) to retract backward. The firing part (21) abuts against the rear side of the push column (4). When the firing part (21) fires for the first time, the pushing column (4) is fired to the first position in the sliding channel (10), thereby causing the clamping jaws to enter the pre-clamping state; When the firing part (21) fires again, the two-stage firing assembly (5) drives the firing part (21) to fire the push column (4) further, thereby causing the clamping jaws to perform clamping.

Images