Surgical forceps head assembly and surgical instrument

Abstract

The operating forceps head assembly comprises a forceps head seat, a connecting piece, a movable piece, a forceps head and a transmission mechanism, the movable piece is arranged between the forceps head seat and the connecting piece, the forceps head seat and the connecting piece can be rotatably connected, the movable piece can roll, the friction force is small, rotation is more flexible, and the transmission mechanism can rotate more flexibly. Blocking cannot be generated; the notch is formed in the tong head seat, and during disassembly and assembly, the notch allows the tong head seat to deform, so that the connecting piece with the movable piece can be smoothly inserted into the tong head seat or separated from the tong head seat, disassembly and assembly are convenient, and the tong head is convenient to replace. The surgical instrument comprises the surgical forceps head assembly and has the advantages of being simple in structure, flexible in rotation, convenient to disassemble and low in cost.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a surgical forceps assembly and a surgical instrument. Background Technology

[0002] Forceps are a major category of endoscopic consumables, mainly used to remove foreign objects such as tissue and stones.

[0003] Currently used surgical forceps typically have a fixed connection between the forceps head and body, which cannot be disassembled. In some surgeries, multiple types or sizes of forceps heads may be needed at once. However, because the forceps head and body are fixed and cannot be replaced individually, the entire surgical forceps often needs to be replaced, resulting in significant resource waste. Some surgical forceps do have detachable forceps heads, but their structures are often more complex, and the forceps heads cannot be rotated, making sample collection inconvenient. Utility Model Content

[0004] One objective of this invention is to provide a surgical forceps assembly that is simple in structure, easy to assemble and disassemble, and has a rotatable forceps head.

[0005] Another objective of this invention is to provide a surgical instrument comprising the surgical forceps assembly.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A surgical forceps assembly, comprising:

[0008] The plier head seat is a hollow tubular structure. The proximal end of the plier head seat has one or more notches, and a first groove arranged circumferentially is formed on the inner side of the proximal end tube wall where the notch is located.

[0009] A connector, which is a hollow tubular structure, is partially or completely inserted into the pliers head seat. A second groove is provided on the outer side wall of the connector located in the pliers head seat, which is arranged circumferentially thereon.

[0010] A movable component, which is rotatably disposed between the first groove and the second groove and has multiple movable components;

[0011] The pliers include a pair of clamping members rotatably connected to the distal end of the pliers seat and having a clamping state and an open state;

[0012] A transmission mechanism is connected to the clamping member and is used to drive the clamping member to switch between a clamping state and an open state.

[0013] The utility model discloses a pincer head seat and connecting piece have recess, through the movable element setting between the recess of both, can realize the rotary connection of pincer head seat and connecting piece, when pincer head seat relative connecting piece rotates, because movable element can roll, thus has smaller friction, rotates more flexible, will not produce the jam, the utility model discloses still through setting the notch on pincer head seat, when connecting piece is inserted or separated from pincer head seat with movable element, the notch allows pincer head seat to deform to make connecting piece can smoothly insert or separate from pincer head seat, convenient replacement pincer head.

[0014] Preferably, the outer end of the second groove extends towards the movable element on both sides to prevent the movable element from falling out of the second groove, and the movable element partially protrudes from the second groove.

[0015] Preferably, the inner side wall of the second groove is in a circular arc shape.

[0016] Preferably, the movable element is in a spherical shape.

[0017] In some embodiments, the radius of the movable element is r, the number of the movable elements is n, the distance from the second groove to the center line of the connecting piece is R, and the r, n and R satisfy the following relationship: π(R+r) / 2r < n < π(R+r) / r.

[0018] Preferably, the notch extends along the axial direction of the pincer head seat and does not penetrate the pincer head seat.

[0019] In some embodiments, the notch has two symmetrical parts.

[0020] Preferably, the first groove is outwardly recessed and in a circular arc shape.

[0021] Preferably, the transmission mechanism includes a pull rod connected to the clamping member and a pull cable detachably connected to the pull rod.

[0022] In some embodiments, the proximal end of the pull rod is composed of at least two separate petals, the petals have locking grooves, and the distal end of the pull cable is a ball head that abuts between the locking grooves of the petals.

[0023] The utility model also provides a surgical instrument comprising the surgical pincer head assembly as described above.

[0024] Preferably, the surgical instrument further comprises an elongated tube connected to the connecting piece, a housing connected to the elongated tube, and an operation part, the housing comprises a fixed part fixedly connected to the elongated tube and a rotating part rotatably arranged on the fixed part, and the operation part is slidably arranged on the rotating part and connected to the transmission mechanism.

[0025] Compared with the prior art, the utility model has the following advantages:

[0026] The utility model discloses a surgical forceps head subassembly, including forceps head seat, connecting piece, movable element, forceps head and transmission mechanism, the recess has on forceps head seat and connecting piece, through the movable element setting between the recess of both, can realize the rotary connection of forceps head seat and connecting piece, and movable element can roll, and the friction is small, and the rotation is more flexible, does not produce the jamming, through setting the notch on forceps head seat, when dismounting, the notch allows forceps head seat to deform, to make connecting piece with movable element can smoothly insert forceps head seat or with forceps head seat and separate, and dismounting is convenient, and the forceps head of convenient replacement is provided.

[0027] The utility model discloses a surgical instrument including the surgical forceps head subassembly, has simple structure, rotates flexibly, and the advantage that dismounting is convenient, and the low -cost. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 The structure schematic drawing of surgical forceps head subassembly is provided for example 1;

[0029] Figure 2 The structure exploded view of surgical forceps head subassembly is provided for example 1;

[0030] Figure 3 It is the enlarged schematic drawing of I part in Figure 2

[0031] Figure 4 The structure schematic drawing of forceps head seat and connecting piece is provided for example 1;

[0032] Figure 5 It is the section schematic drawing of A-A face; Figure 4

[0033] It is the enlarged schematic drawing of II part in Figure 6 Figure 5 The structure schematic drawing of connecting piece another angle is provided for example 1;

[0034] Figure 7 The structure schematic drawing of surgical instrument is provided for example 2;

[0035] Figure 8 It is the section schematic drawing of B-B face;

[0036] Figure 9 Figure 8

[0037] ​​​​Wherein: 1, the head seat; 11, notch; 12, first groove; 2, connecting piece; 21, second groove; 211, limiting end; 3, movable piece; 4, clamping member; 5, elongated tube; 6, pull rod; 61, petal; 62, locking groove; 7, pull cable; 71, ball head; 8, housing; 81, fixed part; 82, rotating part; 9, operating part. DETAILED DESCRIPTION

[0038] Hereinafter, only certain exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the embodiments of the present application. Therefore, the drawings and the description are considered to be exemplary in nature rather than limiting.

[0039] In the description of the embodiments of the present application, it is understood that the distal end refers to the end of the instrument or component away from the operator, the proximal end refers to the end of the instrument or component close to the operator, the axial direction refers to the direction parallel to the center line of the distal end and the proximal end of the instrument or component, and the inner and outer positions are defined relative to the center of the instrument or component, wherein the inner position is close to the center of the instrument or component, and the outer position is away from the center of the instrument or component. The above-mentioned orientation words are only for the convenience of describing the embodiments of the present application and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0040] In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0041] In the embodiments of the present application, unless otherwise specifically defined and limited, the "upper" or "lower" of the first feature relative to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "above", "upper" and "upper surface" of the first feature relative to the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature relative to the second feature include that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0042] The above disclosure provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described above. Of course, they are only examples and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples, and such repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed.

[0043] The present application will be further described below in conjunction with the embodiments shown in the drawings.

[0044] Embodiment 1

[0045] A surgical forceps head assembly, as shown in Figures 1 to 7 , comprises a forceps head seat 1, a connecting piece 2, a movable piece 3, a forceps head and a transmission mechanism.

[0046] The forceps head seat 1 is a hollow tubular structure, and its proximal end has one or more notches 11, which are preferably extended along the axial direction and do not penetrate the forceps head seat 1. In this embodiment, the notches 11 have two symmetrical centers along the axial line of the forceps head seat 1, i.e. the proximal end of the forceps head seat 1 is divided into two circular arc petals. The inner side of the proximal end of the forceps head seat 1 where the notches 11 are located is provided with a first groove 12 arranged along the circumferential direction. As a preferred, the first groove 12 is outwardly recessed and has a circular arc shape.

[0047] The connecting piece 2 is a hollow tubular structure, and its outer side is provided with a second groove 21 arranged along the circumferential direction. The movable piece 3 is movably embedded in the second groove 21 and cannot fall out of the second groove 21. Specifically, the outer end portions (i.e. limiting end portions 211) on both sides of the second groove 21 extend towards the movable piece 3 to limit the movable piece 3 in the second groove 21, thereby preventing the movable piece 3 from falling out of the second groove 21. The second groove 21 is preferably a circular arc shape. The movable piece 3 partially protrudes out of the second groove 21. During assembly, the connecting piece 2 is inserted into the forceps head seat 1 along the axial direction, and the movable piece 3 makes the forceps head seat 1 have a tendency to deform outwardly. The notches 11 of the forceps head seat 1 allow the forceps head seat 1 to deform outwardly, so that the movable piece 3 protruding out of the second groove 21 enters the first groove 12, thereby realizing the rotational connection of the forceps head seat 1 and the connecting piece 2. During disassembly, the connecting piece 2 is pulled in the opposite direction to be separated from the forceps head seat 1, which is very convenient.

[0048] The movable member 3 is preferably spherical, which can be freely rolled between the first groove 12 and the second groove 21, and has a small friction with the first groove 12 and the second groove 21, so that the jaw holder 1 can be more flexible and will not be jammed. In order to ensure that the connecting member 2 and the jaw holder 1 can be stably connected, the number of the movable member 3 cannot be too small, and the radius of the movable member 3 and the number of the movable member 3 satisfy the following relationship: π(R+r) / 2r < n, wherein the radius of the movable member 3 is r, the number of the movable member 3 is n, and the distance from the second groove 21 to the axis of the connecting member 2 is R. With the increase of the number of the movable member 3, the cost also increases, so the number of the movable member 3 cannot be too large, and further preferably π(R+r) / 2r < n < π(R+r) / r.

[0049] The jaw includes a pair of clamping members 4 rotatably connected to the distal end of the jaw holder 1, and the jaw has a clamping state and an open state. The shape and structure of the clamping member 4 are not limited, and can refer to the prior art.

[0050] A transmission mechanism is connected to the clamping member 4 for driving the clamping member 4 to switch between the clamping state and the open state. The transmission mechanism includes a pull rod 6 connected to the clamping member 4 and a pull cable 7 detachably connected to the pull rod 6. In this embodiment, the proximal end of the pull rod 6 is composed of at least two separate petals 61, and the petals 61 are provided with locking grooves 62. The distal end of the pull cable 7 is a ball head 71, and the ball head 71 abuts between the locking grooves 62 of the petals 61.

[0051] Embodiment 2

[0052] A surgical instrument, as shown in Figure 8 and Figure 9 In addition to the surgical jaw assembly described in Embodiment 1, the surgical instrument further includes an elongated tube member 5 connected to the connecting member 2, a housing 8 connected to the elongated tube member 5, and an operating part 9 slidingly arranged on the housing 8 and connected to the transmission mechanism. Under the control of the operating part 9, the transmission mechanism can drive the clamping member 4 to switch between the clamping state and the open state.

[0053] The housing 8 includes a fixed part 81 fixedly connected to the elongated tube member 5 and a rotating part 82 rotatably arranged on the fixed part 81, and the rotating part 82 is provided with a sliding groove, and the operating part 9 is arranged on the sliding groove and connected to the pull cable 7. By controlling the sliding of the operating part 9, the clamping and loosening of the jaw can be realized; by rotating the rotating part 82, the rotating part 82 can drive the operating part 9, the pull cable 7, the pull rod 6, the jaw, and the jaw holder 1 to rotate synchronously.

[0054] The above examples are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and to implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. A surgical forceps head assembly, comprising: The utility model relates to a surgical forceps head assembly, comprising: a forceps head seat (1) which is a hollow tubular structure, the proximal end of the forceps head seat (1) having one or more notches (11), the inner side of the proximal end of the forceps head seat (1) where the notches (11) are located being provided with a first groove (12) arranged along the circumference thereof; a connecting piece (2) which is a hollow tubular structure, the connecting piece (2) being partially or wholly inserted into the forceps head seat (1), the outer side wall of the connecting piece (2) located in the forceps head seat (1) being provided with a second groove (21) arranged along the circumference thereof; a movable piece (3) which is rollably arranged between the first groove (12) and the second groove (21) and has a plurality of; a forceps head comprising a pair of clamping members (4) which are rotatably connected to the distal end of the forceps head seat (1) and have a clamping state and an open state; a transmission mechanism which is connected to the clamping members (4) and is used to drive the clamping members (4) to switch between the clamping state and the open state.

2. The surgical forceps head assembly of Claim 1, wherein, The outer ends of the second groove (21) on both sides extend towards the direction close to the movable piece (3) to prevent the movable piece (3) from falling out of the second groove (21), and the movable piece (3) partially protrudes from the second groove (21).

3. The surgical forceps head assembly of Claim 1, wherein, The movable piece (3) is spherical.

4. The surgical forceps head assembly of claim 3, wherein, The radius of the movable piece (3) is r, the number of the movable pieces (3) is n, the distance from the second groove (21) to the axis of the connecting piece (2) is R, and the r, n and R satisfy the following relationship: π(R+r) / 2r < n < π(R+r) / r.

5. The surgical forceps head assembly of Claim 1, wherein, The notches (11) extend along the axial direction of the forceps head seat (1) and do not penetrate through the forceps head seat (1).

6. The surgical forceps head assembly of claim 1 or 5, wherein, The notches (11) have two symmetrical notches.

7. The surgical forceps head assembly of Claim 1, wherein, The transmission mechanism comprises a pull rod (6) connected to the clamping members (4) and a pull cable (7) detachably connected to the pull rod (6).

8. The surgical forceps head assembly of claim 7, wherein, The proximal end of the pull rod (6) is composed of at least two separate petals (61), the petals (61) being provided with locking grooves (62), and the distal end of the pull cable (7) is a ball head (71) which abuts between the locking grooves (62) of the petals (61).

9. A surgical instrument, characterized by The utility model relates to a surgical forceps head assembly.

10. The surgical instrument of claim 9, wherein, The surgical instrument further comprises an elongated tube (5) connected to the connecting piece (2), a housing (8) connected to the elongated tube (5), and an operating part (9), the housing (8) comprising a fixed part (81) fixedly connected to the elongated tube (5) and a rotating part (82) rotatably arranged on the fixed part (81), and the operating part (9) is slidably arranged on the rotating part (82) and connected to the transmission mechanism.

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