Transmission mechanism of continuous-fire clip applicator, continuous-fire clip applicator and clip applying method

Abstract

The present application provides a transmission mechanism for a continuous-fire clamp, including a housing, an actuator assembly and a transmission mechanism assembly. The housing is divided into an upper and lower cavity, the upper portion is equipped with an actuator assembly, including an action limit sleeve, a clamp closing slider and a push slider; the lower portion is equipped with a transmission mechanism assembly, including a toggle member, a driving gear, a driven gear, a first push rod and a second push rod. The root of the toggle member is connected to a first spring, and by rotating different angles, the movement of the clamp closing slider and the push slider is controlled to realize the clamping process. The present application divides the clamping process by setting a first hollow groove and a second hollow groove to improve ease of operation.

Description

Technical Field

[0001] The present application relates to the field of clip applicators, and in particular to a transmission mechanism of a continuous-fire clip applicator, a continuous-fire clip applicator and a clip applying method. Background Art

[0002] In human surgical operations, such as abdominal surgery, a clip applier is often used in conjunction with a closing clamp to ligate blood vessels or tissues to block blood flow. The clip appliers in the prior art are mainly single-shot clip appliers and disposable continuous-fire clip appliers. A single-shot clip applier is a type of clip applier that requires the tissue clip to be reinstalled at the clamp head after each clamping operation. A disposable continuous-fire clip applier has a built-in, non-detachable, replaceable clip compartment, in which a certain number of clips are pre-installed and can be fired continuously. Disposable continuous-fire clip appliers improve the clipping efficiency compared to single-shot clip appliers, but due to their disposable nature, they are more expensive, increasing the economic burden on both doctors and patients. Summary of the invention

[0003] The purpose of the present application is to overcome the above-mentioned prior art and provide a transmission mechanism of a continuous-fire clip applicator, a continuous-fire clip applicator and a clip applying method.

[0004] The present application provides a transmission mechanism for a continuous-fire clip applier, comprising: a housing, an actuator assembly and a transmission mechanism assembly;

[0005] The housing is in the shape of a toggle member and includes an upper cavity and a lower cavity;

[0006] The actuator assembly is installed in the upper cavity, and the actuator assembly includes an action limiting sleeve, and a clamping slider and a pushing slider are mounted on the action limiting sleeve;

[0007] The transmission mechanism assembly is installed in the lower cavity, and the transmission mechanism assembly includes a toggle member extending out of the lower cavity, a driving gear is fixed at the root of the toggle member, the driving gear is meshed with a driven gear, and the wheels of the driving gear and the driven gear are connected to the clamping slider and the pushing slider through a first push rod and a second push rod respectively;

[0008] The root of the toggle member is connected to a first spring arranged on the housing;

[0009] The action limiting sleeve is laterally provided with a limiting groove, and the clamp closing slider and the pushing slider are respectively connected with a first push rod and a second push rod arranged in the action limiting sleeve through the limiting groove;

[0010] A first idle travel groove is set between the driven gear and the second push rod, and a second idle forming groove is set between the first push rod and the closing slider. When the toggle member rotates by a first angle, the second push rod completes the movement in the first idle forming groove. When the toggle member rotates by a second angle, the second push rod completes the movement in the second idle forming groove. When the toggle member rotates by a third angle, the limit groove limits the movement of the closing slider and the pushing slider.

[0011] Optionally, the actuator assembly further comprises: a front positioning ring and a rear positioning ring fixed in the upper cavity;

[0012] The action limiting sleeve is fixedly mounted on the front positioning ring and the rear positioning ring.

[0013] Optionally, the actuator assembly further comprises: a knob and a rear end cover;

[0014] The knob is fixedly sleeved on the outside of the front positioning ring, and the rear end cover is fixed on the rear side of the pushing slider;

[0015] The knob and the rear end cover are used to fix the reference frame of the clamping forceps that penetrates into the interior of the action limiting sleeve.

[0016] Optionally, the first push rod and the second push rod are respectively parallel double rods, and the double rods are respectively installed on both sides of the clamping slider and the pushing slider.

[0017] Optionally, the first angle is set to 5 degrees, the second angle is set to 10 degrees, and the third angle is set to 40 degrees.

[0018] Optionally, the gear ratio of the driving gear to the driven gear is 40:26.

[0019] Optionally, a self-locking component is fixed on the driving gear, a self-locking hook is installed on the driven gear, and the self-locking hook is connected to a second spring arranged on the housing;

[0020] The self-locking component is provided with a plurality of self-locking grooves, which cooperate with the self-locking hooks for self-locking, and an unlocking groove is provided at the end of the self-locking groove.

[0021] Optionally, the self-locking assembly is self-locked for the first time when the toggle member rotates 7 degrees; and is unlocked when the toggle member rotates 40 degrees.

[0022] The present application also provides a continuous-fire clip applier, which adopts the transmission mechanism of the continuous-fire clip applier mentioned above.

[0023] The present application also provides a method for applying continuous clips, which uses the continuous clip applying forceps to apply clips.

[0024] The beneficial effects of this application are:

[0025] The present application provides a transmission mechanism of a continuous-fire clamp, comprising: a housing, an actuator assembly and a transmission mechanism assembly; the housing is in the shape of a toggle member, comprising an upper cavity and a lower cavity; the actuator assembly is installed in the upper cavity, the actuator assembly comprises an action limiting sleeve, a clamp closing slider and a push slider are sleeved on the action limiting sleeve; the transmission mechanism assembly is installed in the lower cavity, the transmission mechanism assembly comprises a toggle member extending out of the lower cavity, a driving gear is fixed at the root of the toggle member, the driving gear is meshed with a driven gear, and the wheels of the driving gear and the driven gear are connected to the clamp closing slider and the push slider respectively through a first push rod and a second push rod; the toggle member is at the root of the The first spring is connected to the housing; the action limiting sleeve is laterally provided with a limiting groove, and the clamping slider and the pushing slider are respectively connected with the first push rod and the second push rod provided in the action limiting sleeve through the limiting groove; a first idle stroke groove is provided between the driven gear and the second push rod, and a second idle groove is provided between the first push rod and the clamping slider. When the toggle member rotates a first angle, the second push rod completes the movement in the first idle groove, and when the toggle member rotates a second angle, the second push rod completes the movement in the second idle groove, and when the toggle member rotates a third angle, the limiting groove limits the movement of the clamping slider and the pushing slider. The present application divides the clamping process by providing the first idle groove and the second idle groove, thereby improving the ease of operation of clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the transmission mechanism of the continuous-fire clip applier in the present application;

[0027] Figure 2 This is a schematic diagram of the initial state of the transmission mechanism of the continuous-fire clamp applicator in this application.

[0028] Figure 3 It is a schematic diagram of the end state of the transmission mechanism of the continuous-fire clip applier in the present application;

[0029] Figure 4 It is a schematic diagram of a self-locking assembly of a transmission mechanism of a burst clip applier in the present application. DETAILED DESCRIPTION

[0030] The present application is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present application and implement it.

[0031] The following contents are all examples of specific implementation processes provided for describing in detail the technical solutions to be protected by this application. However, this application is also implemented in other ways different from the descriptions herein. Under the guidance of the concept of this application, those skilled in the art may implement this application using different technical means. Therefore, this application is not limited to the specific embodiments below.

[0032] The present application provides a transmission mechanism for a continuous-fire clip applier, comprising: a housing, an actuator assembly and a transmission mechanism assembly.

[0033] Please refer to Figure 1 and Figure 2 As shown, the shell is in the shape of a toggle piece as a whole, specifically including two parts, an upper part and an lower part. The interior of the upper part and the lower part is a cavity, forming an upper cavity and a lower cavity. The upper cavity and the lower cavity are actually connected cavities. In the present application, the upper and lower parts of the cavity are actually divided according to the position of the components in the cavity. The upper cavity is the cavity part where the actuator component is installed, and the lower cavity refers to the cavity part where the transmission mechanism component is installed.

[0034] The actuator assembly includes: an action limiting sleeve 219 , a clamping slider 208 , and a pushing slider 210 .

[0035] It also includes: a front positioning ring 109 , a rear positioning ring 110 , and a knob 108 .

[0036] The front positioning ring 109 is fixedly disposed on the upper cavity of the housing, and the outer side is fixedly connected to the knob 108 .

[0037] The front positioning ring 109 , the action limiting sleeve 219 and the rear positioning ring 110 are sequentially installed in the upper cavity, and the action limiting sleeve 219 is fixed between the front positioning ring 109 and the rear positioning ring 110 .

[0038] The clamping slider 208 and the pushing slider 210 are connected and slidably mounted on the action limiting sleeve 219 .

[0039] Furthermore, the interior of the front positioning ring 109 is fixedly connected to the reference frame 300, and the exterior is fixedly connected to the knob 108. The front end of the reference frame 300 is connected to the jaw assembly 400, and the exterior is wrapped by the outer protective cover 104. The inner side of the reference frame 300 accommodates the magazine 106, and the outer protective cover 104 is detachably connected to the front side of the front positioning ring 109. The rear end of the rear positioning ring 110 is respectively fixedly connected to the rear end frame 301 and the plastic end cap 105.

[0040] Under the action of the knob 108, the jaw assembly 400, the reference frame 300, the front positioning ring 109, the rear positioning ring 110, the plastic end cap 105, the rear frame 301 and the clip 106 can be rotated synchronously along the axis.

[0041] The transmission mechanism assembly includes: a toggle member 103, a driving gear 201, a driven gear 202, a first push rod 204, a second push rod 206, a clamping connection seat 213, a pushing connection seat 214, a clamping connecting rod 215, a pushing connecting rod 216, and a first spring 224.

[0042] Furthermore, it also includes:

[0043] A first idle travel groove 203 is arranged on the driven gear 202, a first push rod transfer head 205 is arranged on the head of the first push rod 204, a push push rod transfer head 207 is arranged on the head of the second push rod 206, a closing slider transfer groove 209 is arranged on the circumference of the closing slider 208, and a push slider transfer groove 211 is arranged on the circumference of the push slider 210.

[0044] The transmission mechanism assembly 200 is accommodated in the lower cavity.

[0045] The root of the upper end of the shifting member 103 is disposed in the housing and is fixedly connected to the driving gear 201 and the first push rod 204 .

[0046] The first push rod transfer head 205 is arranged to slide in the closing slider transfer groove 209 circumferentially of the closing slider 208 , and can push the closing slider 208 forward after the first push rod 204 rotates clockwise by a certain angle.

[0047] The driving gear 201 meshes with a driven gear 202 that is disposed inside the housing 101 and is rotatably connected to the housing 101 .

[0048] The second push rod 206 is rotatably connected to the housing via a rotating shaft on both sides of the driven gear 202. The first idle travel groove 203 provided on the driven gear 202 can drive the push rod 206 to rotate synchronously around the rotating shaft after the driven gear 202 rotates a certain angle.

[0049] The second push rod 206 cooperates with the pushing slider 210 , and the pushing slider 210 is pushed by the second push rod transfer head 207 arranged at the head of the pushing slider 210 and the pushing slider transfer groove 211 arranged circumferentially of the pushing slider 210 .

[0050] The clamp closing slider 208 is provided with a connecting seat 213 connected to the clamp closing connecting rod 215. When the clamp closing slider 208 moves forward and backward on the action limiting sleeve 219, the clamp closing connecting seat 213 moves forward and backward with the clamp closing slider 208.

[0051] The pushing slider 210 is provided with a pushing connection seat 214 , which is fixedly connected to the pushing slider 210 via a threaded hole provided at the top and slides in a pushing slide groove provided on the action limiting sleeve 219 .

[0052] The front end of the push connection seat 214 is connected to the push connecting rod 216 .

[0053] The pushing slider 210 and the clamping slider 208 move back and forth on the action limiting sleeve 219, and realize the sliding limiting effect on the clamping slider 208 and the pushing slider 210, thereby realizing the synchronous and directional transmission function.

[0054] The idle travel groove 203 provided on the driven gear 202 is circumferentially arranged, with a total angle of 5°. The gear ratio of the driving gear 201 to the transmission gear is 40:26, and the rotation angle of the toggle member 103 is 40°, which is in line with the ergonomic design.

[0055] The overall movement process of the transmission mechanism of the continuous clip applier is as follows:

[0056] When the toggle member 103 is in an initial state without being subjected to force, the toggle member 103 is maintained at the clockwise rotation limit position under the pulling force of the first spring 224. At this time, the first push rod transfer head 205 contacts the right end wall of the closing slider transfer groove 209, the right end surface of the closing slider 208 contacts the left end surface of the pushing slider 210, and the second push rod transfer rod 212 is maintained at the rightmost end of the idle travel groove 203.

[0057] Step 1: Press the toggle member 103 to rotate the toggle member 103 counterclockwise.

[0058] While rotating, the driving gear 201 and the first push rod 204 rotate counterclockwise along the toggle member shaft 113 synchronously, and at this time, the first spring 224 is stretched, and the kinetic energy is converted into elastic potential energy.

[0059] The closing push rod 204 rotates counterclockwise along the toggle member shaft 113, and the first push rod transfer head 205 provided at the head thereof moves forward along the closing slider transfer groove 209, while the closing slider 208 remains stationary.

[0060] During this period, the driving gear 201 rotates counterclockwise to drive the driven gear 202 to rotate clockwise along the axis of the driven gear 202. At this time, the idle travel groove 203 set on the driven gear 202 comes into play, and the second push rod transfer rod 212 does not contact the end face of the idle travel groove 203, so that the second push rod 206 remains stationary under the action of friction, and the second push rod transfer head 207 set at the head of the second push rod 206 is fixedly matched in the push slider transfer groove 309211, so that the push slider 210 remains stationary during this period.

[0061] Step 2: Press the toggle member 103: When the toggle member 103 is rotated 5° counterclockwise, the left end face of the idle travel groove 203 on the driven gear 202 begins to contact the second push rod transmission rod 212. When the toggle member 103 is rotated counterclockwise by more than 5° and less than 10°, the left end face of the idle travel groove 203 of the driven gear 202 pushes the second push rod 206 to rotate counterclockwise, and the second push rod transmission head 207 moves backward, driving the push slider 210 to move backward and transmit it to the front push piece 115 through the push connecting rod 216, and the clamp closing slider 208 remains stationary.

[0062] Step 3: When the toggle member 103 is pressed and rotated counterclockwise by 10°, the first push rod transfer head 205 moves rightward and contacts the left end of the closing slider transfer slot 209. At this time, the second push rod 206 drives the push slider 210 to continue to move backward. When the toggle member 103 is pressed and rotated counterclockwise by more than 10°, the first push rod transfer head 205 pushes the closing slider 208 to move forward and transmits it to the front jaw assembly 400 through the closing link 215. The closing slider 208 moves forward to compress the main spring 223. At this time, the second push rod 206 continues to push the push slider 210 to move backward until the toggle member 103 rotates counterclockwise by 40°.

[0063] Step 4: When the toggle member 103 is pressed and rotated 40° counterclockwise, the clamp closing slider 208 moves forward by 10 mm, and the pushing slider 210 moves backward by 22 mm.

[0064] When the handle 103 is released, the main spring 223 recovers its deformation and pushes the clamping slider 208 to move backward, and transmits it to the jaw assembly 400 through the clamping link 215. At the same time, the first spring 224 recovers its deformation to make the toggle member 103 rotate clockwise, and the first push rod 204 and the driving gear 201 rotate clockwise synchronously with the toggle member 103. The clockwise rotation of the driving gear 201 causes the driven gear 202 to rotate counterclockwise. At this time, the idle travel groove 203 plays a role under the action of friction, and the push push rod transmission rod 212 does not contact the end surface of the idle travel groove 203, so that the driven gear 202 rotates counterclockwise while the second push rod 206 remains stationary, thereby keeping the push slide 210 stationary.

[0065] When the toggle member 103 is released and rotated 5° clockwise, the left end of the idle travel slot 203 contacts the connecting rod of the push push rod 206 and starts to push the second push rod 206 to rotate counterclockwise, thereby causing the push slider 210 to move forward. At this time, under the action of the main spring 223, the closing slider 208 continues to move backward.

[0066] When the toggle member 103 is released and rotated 30° clockwise, the clamping slider 208 retreats to the limit position under the action of the main spring 223, and the toggle member 103 continues to rotate clockwise under the action of the first spring 224, so that the push slider 210 continues to move forward. When the toggle member 103 is released and rotated clockwise by more than 30° and less than 35°, the first push rod transfer head 205 is out of contact with the left end surface of the clamping slider transfer slot 209, the clamping slider 208 remains stationary, and the first push rod 204 continues to rotate with the clockwise rotation of the toggle member 103, and the push slider 210 continues to move forward.

[0067] When the toggle member 103 is released and rotated 40° clockwise, the toggle member 103 rotates clockwise to the extreme position, the first push rod transfer head 205 contacts the right end wall of the closing slider transfer groove 209, the right end surface of the closing slider 208 contacts the left end surface of the pushing slider 210, and the second push rod transfer rod 212 remains at the rightmost end of the idle travel groove 203 to restore the initial state.

[0068] Please refer to Figure 4 As shown, the transmission mechanism of the continuous-fire clip applier further includes: a self-locking assembly mechanism 500. Specifically, the self-locking assembly mechanism 500 includes:

[0069] The self-locking component 501 , the self-locking hook 502 , the self-locking spring 503 , and the tooth groove 504 and the self-locking release groove 505 provided on the self-locking component 501 .

[0070] The self-locking hook 502 cooperates with the self-locking teeth similar to a ratchet mechanism.

[0071] The self-locking hook 502 is designed in reverse according to the specific movement process, that is, the initial state of the self-locking hook 502 is on the angular bisector of the self-locking state and the self-locking release state, and the self-locking spring 503 provides an initial pulling force to keep the movement state of the self-locking hook 502 stable. According to calculations and experiments, a pulling force of 0.2N is required to complete the self-locking and self-locking states.

[0072] Specifically, the overall movement process of the self-locking assembly 500 is:

[0073] Step 1: Press the toggle 103 to rotate counterclockwise along the rotating shaft, and the self-locking teeth rotate counterclockwise synchronously with the toggle 103. When the toggle 103 rotates counterclockwise by 7°, the self-locking component 501 begins to contact the self-locking hook 502. Continue to press the toggle 103, the self-locking film rotates and pushes the self-locking hook 502 to rotate clockwise until it passes the first tooth groove 504 of the self-locking component 501. At this time, the self-locking hook 502 naturally rebounds under the action of the self-locking spring 503 and contacts the tooth groove 504, and resists the tooth groove 504 to complete self-locking.

[0074] At this time, when the toggle member 103 is released, the toggle member 103 will not rebound naturally.

[0075] Step 2: Continue to press the handle 103 to rotate counterclockwise, and the first tooth groove 504 of the self-locking component 501 pushes the self-locking hook 502 to rotate clockwise until the self-locking hook 502 passes the second tooth groove 504 and naturally rebounds to achieve the second self-locking.

[0076] In the present application, the self-locking component 501 is provided with a total of 5 self-locking tooth grooves 504 , which can achieve five times of self-locking in the whole process of pressing the toggle member 103 .

[0077] Step 3: When the toggle member 103 is pressed and rotated 40° counterclockwise, the self-locking hook 502 passes through the self-locking release groove 505 and naturally rebounds under the action of the self-locking spring 503. At this time, the toggle member 103 is released, and the self-locking hook 502 rotates counterclockwise under the action of the self-locking release groove 505 and the tooth groove 504, and passes through the self-locking release groove 505 and the tooth groove 504 in turn until it is disengaged from the self-locking component 501.

[0078] The self-locking state is now released.

[0079] The present application also provides a continuous-fire clip applier, which adopts the transmission mechanism of the continuous-fire clip applier mentioned above.

[0080] The present application also provides a method for applying continuous clips, which uses the continuous clip applying forceps to apply clips.

Claims

1. A transmission mechanism for a burst clip applier, characterized in that: include: Housing, actuator assembly and transmission assembly; The housing is in the shape of a toggle member and includes an upper cavity and a lower cavity; The front and rear ends of the upper cavity are fixedly installed with a front positioning ring and a rear positioning ring; The actuator assembly is installed in the upper cavity, and the actuator assembly includes an action limiting sleeve, a clamping slider and a pushing slider are sleeved on the action limiting sleeve, and the action limiting sleeve is fixed on the front positioning ring and the rear positioning ring; A set knob is fixed on the outer side of the front positioning ring, and a rear end cover is fixed on the rear side of the pushing slider, and the knob and the rear end cover are used to fix the reference frame of the clamp penetrating into the inside of the action limiting sleeve; The transmission mechanism assembly is installed in the lower cavity, and the transmission mechanism assembly includes a toggle member extending out of the lower cavity, a driving gear is fixed at the root of the toggle member, the driving gear is meshed with a driven gear, and the wheels of the driving gear and the driven gear are connected to the clamping slider and the pushing slider through a first push rod and a second push rod respectively; The root of the toggle member is connected to a first spring arranged on the housing; The action limiting sleeve is laterally provided with a limiting groove, the clamp closing slider and the pushing slider are respectively connected with a first push rod and a second push rod arranged in the action limiting sleeve through the limiting groove, the first push rod and the second push rod are parallel double rods, and the double rods are respectively installed on both sides of the clamp closing slider and the pushing slider; A first idle travel groove is set between the driven gear and the second push rod, and a second idle forming groove is set between the first push rod and the closing slider. When the toggle member rotates by a first angle, the second push rod completes the movement in the first idle forming groove. When the toggle member rotates by a second angle, the second push rod completes the movement in the second idle forming groove. When the toggle member rotates by a third angle, the limit groove limits the movement of the closing slider and the pushing slider.

2. The transmission mechanism of the burst clip applier according to claim 1, characterized in that: The first angle is set to 5 degrees, the second angle is set to 10 degrees, and the third angle is set to 40 degrees.

3. The transmission mechanism of the burst clip applier according to claim 2, characterized in that: The gear ratio of the driving gear to the driven gear is 40:

26.

4. The transmission mechanism of the burst clip applier according to claim 1, characterized in that: A self-locking assembly is fixed on the driving gear, a self-locking hook is installed on the driven gear, and the self-locking hook is connected to a second spring arranged on the housing; The self-locking component is provided with a plurality of self-locking grooves, which cooperate with the self-locking hooks for self-locking, and an unlocking groove is provided at the end of the self-locking groove.

5. The transmission mechanism of the burst clip applier according to claim 4, characterized in that: The self-locking assembly is self-locked for the first time when the toggle member rotates 7 degrees; and is unlocked when the toggle member rotates 40 degrees.

6. A continuous clip applier, characterized in that: The rapid-fire clip applier adopts the transmission mechanism of the rapid-fire clip applier according to any one of claims 1 to 5.

7. A method for applying clips in succession, characterized in that: The continuous clip applicator according to claim 6 is used for clip application.

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