CN223095616U - Blade drive assembly and electrosurgical instrument - Google Patents

Abstract

The application relates to a blade driving assembly and an electrosurgical instrument, which are applied to the field of the electrosurgical instrument. The cutter bar comprises a cutter bar, a sliding piece and a driving piece, wherein the cutter bar extends along a first direction and can be in driving connection with a blade assembly, the sliding piece is in driving connection with the cutter bar and can move along the first direction, the driving piece is in driving connection with the sliding piece to drive the sliding piece to move along the first direction, the sliding piece comprises two sliding parts which are detachably connected, a sliding channel for the cutter bar to pass through is formed between the two sliding parts in a surrounding mode, and the cutter bar passes through the sliding channel along the first direction and is fixed to the sliding piece. According to the application, the sliding piece is provided with the two sliding parts which are detachably connected, so that one sliding part can be firstly installed, then the cutter bar is installed, and finally the other sliding part is assembled, thereby realizing the fixation of the cutter bar. The sliding piece is not required to be preassembled to the cutter bar before assembly, so that the convenience of installation is improved.

Description

Blade drive assembly and electrosurgical instrument

Technical Field

The application relates to the technical field of electrosurgical instruments, in particular to a blade driving assembly and an electrosurgical instrument.

Background

The electrosurgical closed cutting instrument and the end effector thereof which are suitable for minimally invasive surgery are instruments which can enter a human body through tiny wounds and cut and coagulate vascular tissues, are also one of instruments which are widely applied to minimally invasive surgery, and are mainly used for cutting, transecting and coagulating tissues in open or endoscopic surgery of abdominal surgery, gynecology, pediatrics and chest surgery.

A surgical instrument is provided in the related art that includes a handle assembly and a shaft assembly. The handle assembly includes a closure trigger, an energy button, and a firing trigger, and the shaft assembly includes an outer tube, a closure actuator, and a firing actuator. The end effector is coupled to a distal end of the shaft assembly, including a jaw assembly having a proximal end and a distal end. The jaw assembly includes a movable jaw member, a fixed jaw member, and a cutting member, the movable jaw member being pivotally movable relative to the fixed jaw member between an open position and a closed position. The knife bar of the cutting member is coupled to the firing actuator by a C-shaped sled that is configured to snap-fit with the knife bar in a radial direction of the knife bar to advance distally within the longitudinal slot.

However, the above-mentioned cutting mechanism needs to preassemble the C-shaped slider onto the cutter bar during assembly, and then assemble the whole obtained by clamping into the housing, which has the problem of complicated installation operation.

Disclosure of utility model

Accordingly, it is desirable to provide a blade drive assembly and an electrosurgical instrument that address the problems of cumbersome installation operations of the cutting mechanism described above.

In a first aspect, the present application provides a blade driving assembly, which adopts the following technical scheme:

The blade driving assembly comprises a cutter bar, a sliding piece and a driving piece, wherein the cutter bar extends along a first direction and can be in driving connection with the blade assembly, the sliding piece is in driving connection with the cutter bar and can move along the first direction, the driving piece is in driving connection with the sliding piece to drive the sliding piece to move along the first direction, the sliding piece comprises two sliding parts which are detachably connected, a sliding channel for the cutter bar to pass through is formed between the two sliding parts in a surrounding mode, and the cutter bar is arranged in the sliding channel in a penetrating mode along the first direction and is fixed to the sliding piece.

In one embodiment, the sliding member further includes a mounting portion disposed between the two sliding portions, the mounting portion is fixed to any one of the sliding portions, and the sliding passage penetrates through the mounting portion along the first direction.

In one embodiment, the two sliding parts are configured to be axisymmetrically distributed with the central axis of the cutter bar.

In one embodiment, one of the sliding parts comprises at least one clamping block, the other sliding part is provided with a clamping groove corresponding to the clamping block, and the clamping block can be adaptively inserted into the clamping groove.

In one embodiment, the blade driving assembly further comprises two limiting members, the two limiting members are arranged on two opposite sides of the sliding member along the first direction, limiting grooves are formed in the cutter bar corresponding to the limiting members, the limiting grooves are distributed along the circumferential direction of the cutter bar, and the two limiting members can be inserted into the two limiting grooves in a one-to-one correspondence mode and clamped on the sliding member.

In one embodiment, the driving member comprises a push wrench and a transmission gear set, the push wrench can be rotatably mounted on the housing, the push wrench comprises a containing groove, a rack portion is formed on the groove wall of the containing groove, and the transmission gear set can be in transmission connection between the sliding member and the rack portion and is at least partially contained in the containing groove.

In one embodiment, the driving gear set includes a sliding rack, a first gear and a second gear, the sliding rack is fixed on the sliding member and extends along the first direction, the first gear is disposed in the accommodating groove and meshed with the rack portion, and the second gear is coaxially fixed on the first gear and meshed with the sliding rack.

In one embodiment, the blade driving assembly further comprises a rotating member for connecting the blade assembly to drive the blade assembly to rotate along the axial direction of the cutter bar.

In one embodiment, the blade driving assembly further comprises an abutting part and a reset part abutting between the abutting part and the sliding part, wherein the abutting part can be fixed on the clamp rod, and the reset part is sleeved on the periphery of the cutter bar and is configured to stretch and retract along the first direction.

In a second aspect, the present application provides an electrosurgical instrument, comprising:

The electrosurgical instrument comprises a clamp head assembly, a blade assembly and the blade driving assembly, wherein the clamp head assembly comprises a static clamp head and a movable clamp head rotatably mounted on the static clamp head, a cutter channel is formed in the static clamp head, the cutter channel extends along the first direction, the blade assembly is slidably mounted on the cutter channel along the first direction, and the blade driving assembly is in driving connection with the blade assembly so as to drive the blade assembly to slide along the cutter channel.

According to the blade driving assembly, the sliding piece is arranged to be the two sliding parts which are detachably connected, so that one sliding part can be installed firstly when the blade driving assembly is assembled, then the cutter bar is installed, and finally the other sliding part is assembled, so that the cutter bar is fixed. The sliding piece is not required to be preassembled to the cutter bar before assembly, so that the convenience of installation is improved.

Drawings

Fig. 1 is an overall view of an electrosurgical instrument in accordance with one embodiment of the present application.

Fig. 2 is a schematic view of a head assembly and a blade assembly according to an embodiment of the present application.

Fig. 3 is a schematic view of a clamp head assembly and a blade drive assembly according to an embodiment of the present application.

Fig. 4 is an exploded view of a blade drive assembly in accordance with one embodiment of the present application.

The drawings are marked with the following description:

1. Blade drive assembly, 11, knife bar, 12, slider, 121, first slider, 122, second slider, 1221, clamping block, 123, mounting, 13, driver, 131, push wrench, 1311, receiving slot, 132, drive gear set, 1321, sliding rack, 1322, first gear, 1323, second gear, 133, rack portion, 14, stopper, 15, rotator, 151, holder, 152, knob, 16, abutment, 17, reset, 2, head assembly, 21, static head, 211, knife channel, 22, moving head, 23, clamp bar, 231, inner tube, 232, outer tube, 3, blade assembly, 4, handle, 41, left half shell, 42, right half shell, F1, first direction.

Detailed Description

In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that, if any, these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., are used herein with respect to the orientation or positional relationship shown in the drawings, these terms refer to the orientation or positional relationship for convenience of description and simplicity of description only, and do not indicate or imply that the apparatus or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the application.

Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.

In the present application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, they may be fixedly connected, detachably connected or integrally formed, mechanically connected, electrically connected, directly connected or indirectly connected through an intermediate medium, and communicated between two elements or the interaction relationship between two elements unless clearly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment. Where the "first direction" may be the direction in which the line between the proximal and distal ends of the electrosurgical instrument is located.

Embodiments of the present application are described in further detail below with reference to FIGS. 1-4.

Referring to fig. 1 and 2, an embodiment of the present application provides an electrosurgical instrument, specifically an instrument capable of entering a human body through a tiny wound and cutting and coagulating blood vessel tissues, which includes a handle 4, a jaw assembly 2 mounted on the handle 4, a blade assembly 3 penetrating the jaw assembly 2, and a blade driving assembly 1 disposed in a housing of the handle 4 and driving the blade assembly 3, wherein the blade driving assembly 1 is used for driving the blade assembly 3 to move.

The clamp head assembly 2 comprises a clamp rod 23 connected to the handle 4, a static clamp head 21 and a movable clamp head 22 are arranged at one end, far away from the handle 4, of the clamp rod 23, the movable clamp head 22 is fixed on an outer tube 232 of the clamp rod 23, the static clamp head 21 is movably connected with an inner tube 231 of the clamp rod 23 and can rotate relative to the static clamp head 21, and therefore opening and closing control of the clamp head assembly 2 is achieved.

Specifically, the static binding head 21 is provided with a tool channel 211 extending along the first direction F1, and the blade assembly 3 can be slidably mounted in the tool channel 211 along the first direction F1. The blade driving assembly 1 is in driving connection with the blade assembly 3 and can drive the blade assembly 3 to slide along the cutter channel 211 so as to realize the cutting operation of vascular tissues.

Referring to fig. 3, the blade driving assembly 1 includes a knife bar 11 penetrating through the clamp bar 23 and connected to the blade assembly 3, a slider 12 fixed to the knife bar 11, and a driving member 13 drivingly connected to the slider 12. Wherein the cutter bar 11 extends along a first direction F1, and the driving member 13 can drive the sliding member 12 to slide along the first direction F1, so that the cutter bar 11 drives the blade assembly 3 to move and cut along the first direction F1.

In other embodiments, the blade drive assembly 1 further comprises a rotating member 15 for coupling to the blade assembly 3, the rotating member 15 comprising a fixed seat 151 secured to the clamp bar 23 and a knob 152 mounted to the fixed seat 151. In the embodiment of the present application, the fixing base 151 is clamped to the side wall of the clamp rod 23, and the handle 4 includes a left half shell 41 and a right half shell 42 that can be mutually clamped and matched, where the left half shell 41 and the right half shell 42 are clamped together to the fixing base 151 so as to realize axial limitation of the fixing base 151.

The knob 152 is wrapped around the left half shell 41, the right half shell 42 and the fixing base 151, and is clamped to the fixing base 151, when the operator rotates the knob 152, the fixing base 151 is driven to rotate, and the clamp rod 23 is further driven to rotate, so as to drive the clamp head assembly 2 and the blade assembly 3 to rotate along the axial direction.

In some embodiments, as shown in connection with fig. 4, glide 12 includes two glides that are removably connected. In the embodiment of the present application, for convenience of explanation, the two sliding parts are respectively named as a first sliding part 121 and a second sliding part 122, a sliding channel for the cutter bar 11 to pass through is enclosed between the first sliding part 121 and the second sliding part 122, and the cutter bar 11 can pass through the sliding channel along the first direction F1 and be fixed on the sliding member 12, so as to realize driving connection between the cutter bar 11 and the sliding member 12.

Further, in order to facilitate assembly, in the embodiment of the present application, the first sliding portion 121 and the second sliding portion 122 are configured to be axisymmetric with respect to the central axis of the cutter bar 11, and detachable connection is achieved between the first sliding portion 121 and the second sliding portion 122 by adopting a clamping and fixing manner.

Specifically, the first sliding portion 121 includes at least one clamping block 1221, the clamping block 1221 is integrally formed on an end surface of the first sliding portion 121 facing the second sliding portion 122, the second sliding portion 122 is provided with a clamping groove corresponding to the clamping block 1221, and the clamping block 1221 of the first sliding portion 121 can be inserted into the clamping groove of the second sliding portion 122 along the radial adaptation of the cutter bar 11, so as to realize detachable connection between the first sliding portion 121 and the second sliding portion 122.

During actual assembly, the first sliding part 121 and the second sliding part 122 are connected into the sliding part 12 in a clamping and fixing mode, and the sliding part 12 is sleeved on the cutter bar 11, so that the whole structure of the blade driving assembly 1 is simpler. In the embodiment of the present application, the first sliding portion 121 and the second sliding portion 122 are preferably fastened and fixed up and down, and when in installation, the second sliding portion 122 can be installed first, then the cutter bar 11 is installed, and finally the first sliding portion 121 is fastened and fixed on the second sliding portion 122 to fix the cutter bar 11. The assembling mode of the sliding piece 12 of the application omits the step of pre-fixing the cutter bar 11 and the C-shaped sliding block, so that the blade driving assembly 1 is more convenient to install, and the installation step is simplified.

Referring to fig. 3 and 4, in some other embodiments, the sliding member 12 further includes a mounting portion 123 disposed between the first sliding portion 121 and the second sliding portion 122, the mounting portion 123 can be fixed to the first sliding portion 121 or the second sliding portion 122, and the sliding channel can penetrate through the mounting portion 123 along the first direction F1. In the embodiment of the present application, only the mounting portion 123 is integrally formed with the second sliding portion 122. It will be appreciated that in other embodiments, the mounting portion 123 may be secured to the first sliding portion 121 by, for example, bonding, integral injection molding, etc., to provide a connection with the sliding portion.

With continued reference to fig. 4, in other embodiments, the blade driving assembly 1 further includes two limiting members 14, where the two limiting members 14 are disposed on opposite sides of the mounting portion 123 along the first direction F1. In the embodiment of the application, two limiting grooves are arranged on the cutter bar 11 at intervals along the first direction F1, and the two limiting grooves are arranged in one-to-one correspondence with the two limiting pieces 14.

During assembly, after the cutter bar 11 passes through the mounting portion 123 along the first direction F1 through the sliding channel, the two limiting grooves are respectively located at two opposite sides of the mounting portion 123 in the first direction F1, and the operator correspondingly inserts the limiting pieces 14 into the limiting grooves, so that the pair of limiting pieces 14 are clamped together on the mounting portion 123, and limiting of the cutter bar 11 in the first direction F1 (axial direction) is achieved.

Further, in order to avoid the setting of the limiting member 14 to hinder the axial rotation of the cutter bar 11, in the embodiment of the present application, the limiting groove is configured as an annular groove and is arranged along the circumferential direction of the cutter bar 11, so that the axial displacement of the cutter bar 11 can be limited while the axial rotation can be realized.

As shown in fig. 3 and 4, the driving member 13 includes a push wrench 131 and a transmission gear set 132, wherein the push wrench 131 is rotatably mounted on the handle 4, and the transmission gear set 132 is drivingly connected between the push wrench 131 and the sliding member 12, so that an operator can drive the blade assembly 3 to move along the first direction F1 by rotating the push wrench 131.

The push wrench 131 includes a receiving groove 1311, a rack portion 133 is formed on a groove wall of the receiving groove 1311, and the driving gear set 132 can be connected between the slider 12 and the rack portion 133 in a driving manner. In the embodiment of the present application, the accommodating groove 1311 may be a waist-shaped groove penetrating through the push-type broach wrench 131, the rack portion 133 may be an arc-shaped rack integrally formed on a groove wall of the accommodating groove 1311, and may be injection-molded, without connecting a rack to the push-type broach wrench 131, and the structure is simple.

Specifically, the driving gear set 132 includes a sliding rack 1321, a first gear 1322 and a second gear 1323, where the sliding rack 1321 extends along the first direction F1 and is fixed to a side wall of the sliding member 12, and specifically may be fixed to a side wall of the second sliding portion 122 opposite to the first sliding portion 121. The first gear 1322 and the second gear 1323 each employ a common cylindrical gear, with the difference that the radial dimension of the first gear 1322 is much smaller than the radial dimension of the second gear 1323.

After the assembly is completed, the first gear 1322 may be completely received in the receiving groove 1311 of the push wrench 131 and engaged with the rack part 133, the first gear 1322 and the second gear 1323 are coaxially fixed, and the second gear 1323 is engaged with the sliding rack 1321 as described above. The whole structure is compact, the size of the whole handle 4 in the width direction is reduced, or more accommodating spaces can be reserved for other parts in the handle 4.

When an external force is applied to the push wrench 131, the push wrench 131 rotates relative to the handle 4 under the action of the external force, so that the second gear 1323 is driven to rotate through the transmission cooperation of the rack portion 133 and the first gear 1322, and the sliding piece 12 is pushed to move along the first direction F1 through the transmission cooperation of the second gear 1323 and the sliding rack 1321. The blade slider drives the knife bar 11 to move along the first direction F1, so that the blade assembly 3 at the front end of the knife bar 11 is pushed along the knife channel 211 inside the static binding clip 21, thereby cutting the tissue clamped between the movable binding clip 22 and the static binding clip 21.

With continued reference to fig. 3 and 4, in some embodiments, the blade driving assembly 1 further includes an abutment 16 and a return member 17, the abutment 16 is sleeved and fixed on the periphery of the clamp bar 23, the return member 17 is sleeved on the periphery of the knife bar 11 and abuts between the abutment 16 and the sliding member 12, and the return member 17 is compressed along the first direction F1 along with the movement of the sliding member 12.

In the embodiment of the present application, the restoring member 17 may be a spring. After the cutting is completed, the operator removes the external force applied to the push wrench 131, the sliding member 12 will return to the initial position from the final position under the pushing of the reset member 17, and further drives the cutter bar 11 to return to the initial position, so that the blade assembly 3 returns to the initial position along the cutter channel 211, and simultaneously drives the push wrench 131 and the transmission gear set 132 to automatically reset.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims (10)

1. A blade drive assembly, the blade drive assembly comprising:

A cutter bar extending in a first direction and drivingly connected to the blade assembly;

A sliding member drivingly connected to the cutter bar and movable in the first direction, and

The driving piece is in driving connection with the sliding piece so as to drive the sliding piece to move along the first direction;

The sliding piece comprises two sliding parts which are detachably connected, a sliding channel for the cutter bar to pass through is formed between the two sliding parts in a surrounding mode, and the cutter bar passes through the sliding channel along the first direction and is fixed to the sliding piece.

2. The blade drive assembly of claim 1, wherein the glide further comprises a mounting portion disposed between two of the glide portions, the mounting portion being secured to either of the glide portions, the glide path extending through the mounting portion in the first direction.

3. The blade drive assembly of claim 1, wherein two of the glide are configured to be axisymmetrically distributed about a central axis of the arbor.

4. The blade drive assembly of claim 1, wherein one of the slip portions includes at least one clamping block, and the other slip portion defines a clamping slot corresponding to the clamping block, the clamping block being adapted to be inserted into the clamping slot.

5. The blade driving assembly according to claim 1, further comprising two limiting members, wherein the two limiting members are respectively arranged on two opposite sides of the sliding member along the first direction, limiting grooves are formed in the cutter bar corresponding to the limiting members, the limiting grooves are distributed along the circumferential direction of the cutter bar, and the two limiting members can be inserted into the two limiting grooves in a one-to-one correspondence manner and clamped on the sliding member.

6. The blade drive assembly of claim 1, wherein the drive member comprises a push wrench rotatably mounted to the housing, the push wrench comprising a receiving slot having a slot wall formed with a rack portion, and a drive gear set drivingly connected between the sled and the rack portion and at least partially received in the receiving slot.

7. The blade drive assembly of claim 6, wherein the drive gear set includes a slip rack fixed to the slip member and extending in the first direction, a first gear disposed within the receiving slot and engaged with the rack portion, and a second gear coaxially fixed to the first gear and engaged with the slip rack.

8. The blade drive assembly of claim 1, further comprising a rotating member for coupling to the blade assembly to drive the blade assembly to rotate in an axial direction of the arbor.

9. The blade drive assembly of claim 1, further comprising an abutment and a return member abutting between the abutment and the glide, the abutment being securable to a clamp bar, the return member being nested about the periphery of the bar and configured to be retractable in the first direction.

10. An electrosurgical instrument, the electrosurgical instrument comprising:

The clamp head assembly comprises a static clamp head and a movable clamp head rotatably arranged on the static clamp head, wherein the static clamp head is provided with a cutter channel, and the cutter channel extends along the first direction;

A blade assembly slidably mounted to the tool path in the first direction, and

A blade drive assembly according to any one of claims 1 to 9 drivingly connected to the blade assembly to drive the blade assembly to slide along the tool path.