Handle and electrosurgical instrument

Abstract

The utility model relates to a handle and an electrosurgical instrument, and belongs to the field of electrosurgical instruments. The device comprises a shell, a wrench, a guide rail and a locking assembly, wherein the shell is provided with a mounting groove; the wrench is rotationally mounted on the shell and comprises a locking position and a plurality of free positions, and the free positions and the locking position are spaced; the guide rail is arranged on the side, facing the shell, of the wrench and comprises a leading-in area, a locking area and a leading-out area. The locking assembly is rotationally installed on the shell, at least part of the locking assembly is contained in the installation groove, and the locking assembly can slide among the leading-in area, the locking area and the leading-out area so that the wrench can be switched between the free position and the locking position. The locking assembly slides among the leading-in area, the locking area and the leading-out area, so that the relative position between the wrench and the shell is limited, the automatic locking function of the wrench is achieved, and an operator can keep the jaw closed even if the wrench is loosened in the operation process.

Description

Technical Field

[0001] The present application relates to the technical field of electrosurgical instruments, and particularly to a handle and an electrosurgical instrument. Background Art

[0002] The electrosurgical closing and cutting instrument applicable to minimally invasive surgery and its end effector are instruments that can enter the human body through a small wound and cut and coagulate blood vessel tissues, and are also one of the instruments widely used in minimally invasive surgery, mainly used for cutting, transecting and coagulating tissues in abdominal surgery, gynecology, pediatrics and thoracic surgery in open or endoscopic surgeries.

[0003] When the existing electrosurgical closing and cutting instrument is used, the operator needs to always hold the wrench to control the opening and closing of the jaws, which is very inconvenient to use, easily causes hand fatigue of the operator, and thus affects the stability of the surgery. Summary of the Utility Model

[0004] Based on this, in view of the problem that the existing electrosurgical instrument requires the operator to always hold the wrench during use, which easily causes operator fatigue, it is necessary to provide a handle and an electrosurgical instrument.

[0005] In a first aspect, the present application provides a handle, adopting the following technical solution:

[0006] A handle is applied to an electrosurgical instrument. The handle includes a housing, a wrench, a guide rail and a locking assembly. The housing is provided with an installation groove extending in a first direction. The wrench is rotatably installed on the housing. The wrench includes a locking position and a plurality of free positions relative to the housing. The free positions and the locking position are spaced apart. The guide rail is disposed on the end face of the wrench facing the housing. The guide rail includes an introduction area, a locking area and an export area arranged in sequence. The locking assembly is rotatably installed on the housing and at least partially accommodated in the installation groove. The locking assembly can slide along the guide rail between the introduction area, the locking area and the export area. Wherein, when the wrench moves from any one of the free positions to the locking position, the locking assembly moves from the introduction area to the locking area. When the wrench moves from the locking position to any one of the free positions, the locking assembly moves from the locking area to the export area.

[0007] In one of the embodiments, the locking assembly includes a non-rotating piece and two reset members. The reset members are arranged at intervals along the first direction in the installation groove and are connected to the groove wall of the installation groove. The reset members are configured to be able to expand and contract along the first direction. The non-rotating piece is rotatably installed on the housing and is installed between the two reset members.

[0008] In one embodiment, a first protrusion is provided on a side of the anti-rotation piece facing the handle. The first protrusion is installed between the two reset members, and the first protrusion is movably installed in the installation groove.

[0009] In one embodiment, the housing further includes a limiting boss disposed in the installation groove. The limiting boss is provided with a sliding channel through which the first protrusion passes. Along the first direction, the two reset members respectively abut against opposite ends of the limiting boss.

[0010] In one embodiment, the first protrusion is configured in a waist-shaped structure, and an end surface of the sliding channel facing the first protrusion is configured as an arc surface that fits the outer edge of the first protrusion.

[0011] In one embodiment, a second protrusion is provided on a side of the anti-rotation piece facing the wrench. The second protrusion can slide between the introduction area, the locking area, and the export area along the guide rail.

[0012] In one embodiment, the anti-rotation piece further includes a rotationally connected housing mounting portion. The mounting portion is collinear with the first protrusion and the second protrusion, and the first protrusion is disposed between the second protrusion and the mounting portion.

[0013] In one embodiment, the anti-rotation piece further includes a reinforcing rib. The reinforcing rib extends from the first protrusion to the second protrusion. The housing is provided with a relief groove communicating with the installation groove. The reinforcing rib can be received in the relief groove and rotate around the mounting portion.

[0014] In one embodiment, the housing further includes two heightening bosses disposed in the installation groove. The two heightening bosses are provided in one-to-one correspondence with the two reset members and extend along the first direction. The reset member is clamped between the heightening boss and the anti-rotation piece.

[0015] Second aspect, the present application provides an electrosurgical instrument, adopting the following technical solution:

[0016] An electrosurgical instrument includes the above-mentioned handle and the jaw assembly. The jaw assembly includes a jaw rod and a jaw head. The jaw rod is connected between the handle and the jaw head.

[0017] The above-mentioned handle enables the relative position between the wrench and the housing to be restricted by the sliding of the locking component among the insertion area, the locking area and the extraction area, thereby realizing the automatic locking function of the wrench, enabling the operator to keep the jaws closed even when the wrench is released during the operation, thus freeing the operator's hands and avoiding the operation fatigue caused by the operator's long-term holding of the wrench, and further improving the operation stability. Description of the Drawings

[0018] Figure 1 Schematic diagram of an electrosurgical instrument in an embodiment of the present application.

[0019] Figure 2 Schematic diagram of the structure of the housing in an embodiment of the present application.

[0020] Figure 3 Schematic diagram of the structures of the wrench and the locking component in an embodiment of the present application.

[0021] Figure 4 Schematic diagram of the structures of the wrench and the locking component from another perspective in an embodiment of the present application.

[0022] Figure 5 Exploded view of the wrench and the locking component in an embodiment of the present application.

[0023] Explanation of the reference numerals in the drawings:

[0024] 1. Handle; 11. Housing; 111. Mounting member; 1111. Mounting groove; 1112. Relief groove; 112. Limiting boss; 1121. Sliding channel; 113. Raised boss; 12. Wrench; 13. Guide rail; 131. First guiding member; 1311. First guiding arc edge; 1312. Limiting arc edge; 1313. Second guiding arc edge; 1314. Insertion angle; 132. Second guiding member; 14. Locking component; 141. Anti-rotation plate; 1411. First protrusion; 1412. Second protrusion; 1413. Mounting portion; 1414. Reinforcing rib; 142. First reset member; 143. Second reset member; 2. Clamping head assembly; 21. Clamping head; 22. Clamping rod; A. Insertion area; B. Locking area; C. Extraction area; F1. First direction. Detailed Description of the Embodiment

[0025] To make the above objects, features and advantages of the present application more obvious and understandable, the following detailed description of the specific embodiments of the present application will be given with reference to the drawings. Many specific details are set forth in the following description in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0026] In the description of the present application, it should be understood that if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings. These are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application.

[0027] In addition, if there are terms such as "first" and "second", these terms are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present application, if there is a term "plurality", the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0028] In the present application, unless otherwise clearly specified and limited, if there are terms such as "mounted", "connected", "connected to", "fixed", etc., these terms should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0029] In the present application, unless otherwise clearly specified and limited, if there is a description such as a first feature being "above" or "below" a second feature, the meaning may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "below", "under" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0030] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If present, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are only for illustrative purposes and do not represent the only implementation. Among them, the "first direction" is defined as the extending direction of the handle gripping portion.

[0031] The following will further elaborate on the embodiments of this application in conjunction with the attached Figures 1-5 drawings.

[0032] Referring to Figure 1 , an embodiment of this application provides an electrosurgical instrument, which can specifically be an instrument that can enter the human body through a small wound and cut and coagulate vascular tissues. The electrosurgical instrument includes a handle 1 and a jaw assembly 2. The jaw assembly 2 specifically includes a jaw rod 22 and a jaw head 21. The jaw head 21 is disposed at one end of the jaw rod 22 and is used for clamping the assembly, so as to facilitate the operator to perform coagulation or cutting treatment on the clamped tissue. The handle 1 is disposed at the end of the jaw rod 22 away from the jaw head 21 and is used for the operator to grip.

[0033] Specifically, the handle 1 includes a housing 11 and a wrench 12 rotatably mounted on the housing 11. The wrench 12 can specifically be rotatably mounted on the housing 11 through a pin shaft or a bolt. The above-mentioned jaw rod 22 is mounted on one side of the housing 11, and the wrench 12 is drivingly connected to the jaw rod 22 to realize the opening and closing control of the jaw head 21.

[0034] In the embodiment of this application, the wrench 12 has a locking position and a plurality of free positions relative to the housing 11. The plurality of free positions are arranged in sequence along the rotation path of the wrench 12. Along the rotation path of the wrench 12, the locking position is set after the last free position. The wrench 12 can rotate around the housing 11 from any free position to the locking position to fix the position of the wrench 12, so that the jaw head 21 can remain in the current state after the operator releases the force on the handle 1.

[0035] Combined with Figure 2 and Figure 3 as shown, in some embodiments, the handle 1 further includes a guide rail 13 mounted on the wrench 12. The guide rail 13 is integrally formed on the end face of the wrench 12 facing the housing 11. Along the extending direction of the guide rail 13, the guide rail 13 includes a sequentially arranged guiding area A, a locking area B, and an exporting area C.

[0036] The housing 11 includes a mounting member 111 having a mounting groove 1111 formed therein. The mounting groove 1111 extends along the first direction F1. The handle 1 further includes a locking assembly 14 rotatably mounted on the housing 11 and at least partially received in the mounting groove 1111. The locking assembly 14 can slide along the guide rail 13 between the introduction area A, the locking area B, and the export area C as the wrench 12 rotates, so as to lock and release the position of the wrench 12.

[0037] Specifically, when the wrench 12 moves from any free position to the locked position, the locking assembly 14 correspondingly moves from the introduction area A to the locking area B to fix the position of the wrench 12. When the wrench 12 moves from the locked position to any free position, the locking assembly 14 correspondingly moves from the locking area B to the export area C. At this time, the position of the wrench 12 is released and it can freely move to any free position.

[0038] Combined with Figures 2 to 4 As shown, the locking assembly 14 includes a rotation prevention piece 141 and two reset members. In the embodiments of the present application, for the convenience of description, the two reset members are respectively named the first reset member 142 and the second reset member 143. The first reset member 142 and the second reset member 143 are both installed in the mounting groove 1111 and are arranged at intervals along the first direction F1. The opposite ends of the first reset member 142 and the second reset member 143 are respectively fixed on the opposite sides of the mounting member 111, so that the reset members are fixed in the mounting groove 1111. Among them, the first reset member 142 and the second reset member 143 can both be springs.

[0039] In some embodiments, the housing 11 further includes a limiting boss 112 provided in the mounting groove 1111 and integrally formed with the mounting member 111. Along the first direction F1, the limiting boss 112 is provided with a sliding channel 1121 for the rotation prevention piece 141 to pass through. Along the first direction F1, the first reset member 142 and the second reset member 143 respectively abut against the opposite sides of the limiting boss 112 to respectively limit the first reset member 142 and the second reset member 143 in the first direction F1, so as to avoid the situation that the reset ability of the reset member is weakened after long-term use and affects the initial position of the rotation prevention piece 141.

[0040] Further, in some other embodiments, the housing 11 further includes two heightening bosses 113 installed in the installation groove 1111, and the two heightening bosses 113 are respectively arranged corresponding to the first reset member 142 and the second reset member 143. In the embodiment of the present application, the heightening boss 113 is configured as a strip-shaped structure extending along the first direction F1. One ends of the first reset member 142 and the second reset member 143 close to the limiting boss 112 are clamped between the heightening boss 113 and the rotation-stop piece 141, so as to realize the limit of the reset member in the width direction of the handle 1, and ensure that the first reset member 142 and the second reset member 143 always expand and contract along the first direction F1.

[0041] Combined Figures 3 to 5 As shown, the rotation-stop piece 141 has an installation portion 1413, and the installation portion 1413 is rotationally installed on the housing 11 through a pin shaft structure. On the side of the rotation-stop piece 141 facing the handle 1, there is a first protrusion 1411, and the first protrusion 1411 is installed in the gap between the first reset member 142 and the second reset member 143, so as to enable the rotation-stop piece 141 to move along the first direction F1 in the installation groove 1111 through the sliding channel 1121, and further enable the rotation-stop piece 141 to be movably connected inside the housing 11. On the side of the rotation-stop piece 141 facing the wrench 12, there is a second protrusion 1412, and the second protrusion 1412 can slide along the guide rail 13 between the introduction area A, the locking area B and the export area C, and further enable the rotation-stop piece 141 to be slidably connected to the guide rail 13.

[0042] Further, in some other embodiments, on the side of the rotation-stop piece 141 facing the housing 11, there is a reinforcing rib 1414, and the reinforcing rib 1414 extends from the direction where the first protrusion 1411 is located to the direction where the second protrusion 1412 is located. The first protrusion 1411, the second protrusion 1412, the installation portion 1413 and the reinforcing rib 1414 are all integrally formed on the body of the rotation-stop piece 141, and the installation portion 1413 is collinear with the first protrusion 1411 and the second protrusion 1412, and the first protrusion 1411 is located between the second protrusion 1412 and the installation portion 1413.

[0043] Correspondingly, on the side of the installation member 111 facing the rotation-stop piece 141, a relief groove 1112 is opened, and the relief groove 1112 communicates with the installation groove 1111 to accommodate the reinforcing rib 1414. In the embodiment of the present application, the relief groove 1112 is configured as a trapezoidal groove. Along the direction away from the installation portion 1413, the dimension of the installation groove 1111 in the width direction gradually increases to adapt to the movement track of the reinforcing rib 1414.

[0044] Refer to Figure 2 and Figure 3As shown, in some other embodiments, the first protrusion 1411 is configured as a waist-shaped structure, and the end surface of the sliding channel 1121 facing the first protrusion 1411 is configured as an arc surface that fits the outer edge of the first protrusion 1411. The radian of the arc surface is the same as the radian of the outer edge of the mounting portion 1413, so as to facilitate the first protrusion 1411 to slide in the mounting groove 1111 through the sliding channel 1121.

[0045] In addition, in the embodiments of the present application, the first protrusion 1411 is configured as a waist-shaped structure. Compared with being configured as other structures, such as a cylindrical structure, it can also effectively increase the connection area between the first protrusion 1411 and the end surface of the anti-rotation piece 141, thereby increasing the connection stability between the first protrusion 1411 and the anti-rotation piece 141.

[0046] Continue to refer to Figure 3 As shown, the guide rail 13 includes a first guide member 131 and a second guide member 132 arranged at intervals. An introduction area A, a locking area B, and an export area C for the movement of the second protrusion 1412 are formed between the first guide member 131 and the second guide member 132. In the embodiments of the present application, the first guide member 131 is configured as a structure approximately in the shape of an acute triangle, and the long side of the triangle is attached to the outer edge of the wrench 12, and the short side of the triangle is recessed towards the central position of the triangle. The second guide member 132 is configured as a structure with a sharp corner, and the sharp corner of the second guide member 132 protrudes towards the direction where the recess of the first guide member 131 is located, so as to cooperate with the first guide member 131 to define the above-mentioned locking area B. The introduction area A and the export area C are respectively arranged on opposite sides of the locking area B and are connected to the locking area B.

[0047] Specifically, the first guide member 131 includes a first guide arc edge 1311, a limit arc edge 1312, and a second guide arc edge 1313 connected in sequence. Among them, the first guide arc edge 1311 and the second guide arc edge 1313 are the two long sides of the triangular structure. The first guide arc edge 1311 is attached to the outer edge of the wrench 12, the second guide arc edge 1313 is located inside the wrench 12, the limit arc edge 1312 is the short side of the triangular structure, and an introduction angle 1314 is formed at the connection between the first guide arc edge 1311 and the second guide arc edge 1313.

[0048] Taking Figure 3 and Figure 4 As shown as an example, in the embodiments of the present application, in order to ensure the reliability of the locking structure, when the wrench 12 is in the initial position, that is, when the wrench 12 is not stressed, in the height direction of the electrosurgical instrument, the position where the second protrusion 1412 is located is higher than the position where the introduction angle 1314 is located, so that the wrench 12 can slide along the first guide arc edge 1311 and smoothly enter the introduction area A after being driven by an external force.

[0049] During actual use, when the operator applies external force to the wrench 12, the wrench 12 moves from the free position to the locking position under the action of the external force, and the second protrusion 1412 moves along the first guide arc edge 1311 until it enters the introduction area A. At the same time, the first protrusion 1411 compresses the second reset member 143 along the first direction F1, and then under the action of the elastic potential energy of the second reset member 143, the second protrusion 1412 moves to the locking area B and abuts against the limiting arc edge 1312, thereby realizing the locking function. At this time, the wrench 12 also reaches the locking position accordingly.

[0050] When the locked state needs to be released, the operator needs to continue to apply external force to the wrench 12. The wrench 12 moves from the locked position to the free position under the action of the external force. The second protrusion 1412 moves out of the locking area B along the limiting arc edge 1312 and the second guide arc edge 1313 in turn and enters the export area C. At the same time, the first protrusion 1411 compresses the first reset member 142 along the first direction F1, and then returns to the initial position, i.e., the free position, under the action of the elastic potential energy of the first reset member 142, thereby ending the locking.

[0051] In the embodiment of the present application, the first reset member 142 and the second reset member 143 are arranged in the housing 11 to push the anti-rotation plate 141 to move along the guide rail 13, so that the anti-rotation plate 141 cooperates with the guide rail 13 on the side of the wrench 12, thereby reducing the overall lateral size of the handle 1, making the overall structure of the electrosurgical device simpler and more compact. Further, the mounting member 111 and the locking assembly 14 of the handle 1 as shown in the present application are both installed on the upper side of the grip of the handle 1, and the mating position of the wrench 12 and the locking assembly 14 is also on the upper side of the grip of the handle 1, because the space on the lower side of the grip can be saved for the installation of other components, such as the activation button of the powered surgical instrument.

[0052] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0053] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A handle, applied to an electrosurgical instrument, characterized in that, The handle includes: a housing having an installation groove extending in a first direction; a wrench rotatably installed in the housing, the wrench including a locking position and a plurality of free positions provided relative to the housing, the free positions and the locking position being spaced apart; a guide rail provided on an end face of the wrench facing the housing side, the guide rail including an introduction area, a locking area, and an export area arranged in sequence; and a locking component rotatably installed in the housing and at least partially received in the installation groove, the locking component being able to slide along the guide rail between the introduction area, the locking area, and the export area; wherein when the wrench moves from any one of the free positions to the locking position, the locking component moves from the introduction area to the locking area; when the wrench moves from the locking position to any one of the free positions, the locking component moves from the locking area to the export area.

2. The handle according to claim 1, characterized in that, The locking component includes a non-rotating piece and two reset members, the reset members being arranged at intervals in the first direction in the installation groove and connected to the groove wall of the installation groove, the reset members being configured to be able to expand and contract in the first direction, the non-rotating piece being rotatably installed in the housing and installed between the two reset members.

3. The handle according to claim 2, characterized in that, A first protrusion is provided on a side of the non-rotating piece facing the handle, the first protrusion is installed between the two reset members, and the first protrusion is movably installed in the installation groove.

4. The handle according to claim 3, characterized in that, The housing further includes a limiting boss provided in the installation groove, the limiting boss is provided with a sliding channel for the first protrusion to pass through, and along the first direction, the two reset members respectively abut against opposite ends of the limiting boss.

5. The handle according to claim 4, characterized in that, The first protrusion is configured in a waist-shaped structure, and an end face of the sliding channel facing the first protrusion is configured as an arc surface that fits the outer edge of the first protrusion.

6. The handle according to claim 3, characterized in that, A second protrusion is provided on a side of the non-rotating piece facing the wrench, and the second protrusion is able to slide along the guide rail between the introduction area, the locking area, and the export area.

7. The handle according to claim 6, characterized in that, The non-rotating piece further includes a mounting part rotatably connected to the housing, the mounting part is arranged collinearly with the first protrusion and the second protrusion, and the first protrusion is arranged between the second protrusion and the mounting part.

8. The handle according to claim 7, characterized in that, The non-rotating piece further includes a reinforcing rib extending from the first protrusion to the second protrusion, the housing is provided with a relief groove communicating with the installation groove, and the reinforcing rib can be received in the relief groove and rotate around the mounting part.

9. The handle according to claim 2, characterized in that, The housing further includes two heightening bosses provided in the installation groove, the two heightening bosses are arranged in one-to-one correspondence with the two reset members and extend in the first direction, and the reset members are clamped between the heightening bosses and the non-rotating piece.

10. An electrosurgical instrument, characterized in that, Including: the handle according to any one of claims 1-9; and a jaw assembly including a jaw rod and a jaw head, the jaw rod being connected between the handle and the jaw head.

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