CN214387539U - Self-locking biopsy forceps - Google Patents

Abstract

The utility model discloses a self-locking biopsy forceps, which comprises a self-locking part, wherein the self-locking part comprises a head part and a rod part which are connected with each other, a through groove is arranged at one end of the rod part opposite to the connecting end of the head part, the end wall is provided with a cambered surface structure with a convex middle part along the direction of the through groove, and the heights of the two ends of the cambered surface structure along the extending direction of the through groove are flush with the opening of the through groove; a through hole for the rod part to pass through is formed in the side wall of the sliding rod and penetrates into the penetrating cavity from the outside; the tail end of the rod part penetrates into the through cavity through the through hole, and when the biopsy forceps pull rod penetrates through the through groove by rotating the head part, the pull rod can move along the axial direction; the head part is rotated to enable the protruding part of the cambered surface structure to tightly press the pull rod on the side wall of the through cavity, and the clamp head assembly can be locked.

Description

Self-locking biopsy forceps

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to can carry out self-locking's biopsy forceps to binding clip subassembly.

Background

The biopsy forceps, which can be also called biopsy forceps and sampling forceps, are mainly used for biopsy sampling of stomach, intestine, bladder, bronchus and the like under a clinical endoscope, and provide scientific basis for disease diagnosis through pathological examination. When pathological examination of the lesion part is needed, the biopsy forceps are sent into the body of a patient and used for clamping tissues of the lesion part. The biopsy forceps can be used for sampling the lesion tissues, so that large-area wounds cannot be formed, and the biopsy forceps are popular among doctors and patients.

Biopsy forceps generally comprise a forceps head assembly, a sliding rod, a handle and a sliding ring, and the sliding ring reciprocates along the sliding rod to drive the forceps head assembly to open and close through a pull rod and a pull rope. In the using process of the common biopsy forceps in the prior art, after the forceps head assembly is used for sampling, the forceps head assembly can be kept closed only by controlling the sliding ring to be fixed relative to the sliding rod, and therefore difficulty is brought to operation.

SUMMERY OF THE UTILITY MODEL

Based on this, the utility model provides a side sample biopsy forceps aims at solving and is difficult to take a sample to the pathological tissue on the human trachea lateral wall.

The utility model provides a self-locking biopsy forceps, which comprises a slide bar, a slip ring, a pull rod, a spring hose, a pull rope, a forceps head component and a self-locking piece, wherein the middle part of the slide bar is provided with a first guide groove which penetrates through a side wall, the first guide groove extends along the axial direction of the slide bar, and a penetrating cavity which penetrates from the far end to the first guide groove is arranged inside the slide bar; the sliding ring is movably clamped on the sliding rod and can reciprocate along the first guide groove; the pull rod penetrates through the penetrating cavity, and the near end of the pull rod penetrates into the first guide groove to be connected with the slip ring; the near end of the spring hose is fixed at the far end of the sliding rod, and the inner cavity of the spring hose is in butt joint with the penetrating cavity; the pull rope is arranged in the spring hose in a penetrating mode, and the near end of the pull rope is fixedly connected with the far end of the pull rod; the tong head assembly comprises a fixed part and a movable part, the fixed part is connected to the far end of the spring hose, and the movable part is fixedly connected to the far end of the pull rope; the self-locking piece comprises a head part and a rod part which are connected with each other, a through groove is arranged at one end of the rod part, which is opposite to the connecting end of the head part, the end wall is provided with a cambered surface structure with a convex middle part along the direction of the through groove, and the heights of two ends of the cambered surface structure along the extending direction of the through groove are flush with the opening of the through groove; the side wall of the sliding rod is provided with a through hole for the rod part to pass through, and the through hole penetrates into the penetrating cavity from the outside; the tail end of the rod part penetrates into the through cavity through the through hole, and the pull rod can move axially when passing through the through groove by rotating the head part; the head is rotated to enable the protruding portion of the cambered surface structure to press the pull rod on the side wall of the through cavity, and the clamp head assembly can be locked.

Furthermore, a convex column is arranged on the side wall of the rod part, an arc-shaped open slot which is formed along the circumferential direction of the through hole is formed in the side wall of the through hole, and the convex column is arranged in the arc-shaped open slot.

Further, the movable part is a front binding clip, the fixed part is a rear binding clip, the front binding clip comprises a first mounting part, a first accommodating part and a cover cap which are sequentially connected from the near end to the far end along the axial direction, and the first mounting part is of a tubular structure; the first accommodating part is provided with a groove-shaped structure with an opening facing to the side surface, and the near end of the first accommodating part is communicated with the inside of the first mounting part; the cap is covered at the far end of the first accommodating part, and the near end of the cap is opposite to the slotting position of the first accommodating part to form a first knife edge; the rear binding clip comprises a second mounting part and a second accommodating part which are axially connected in sequence from the near end to the far end, and the second mounting part is of a tubular structure; the second accommodating part is provided with a groove-shaped structure with an opening facing to the side surface, and the end wall of the distal end of the second accommodating part forms a second knife edge; the front binding clip can penetrate through the inner cavity of the rear binding clip from the near end, the rear binding clip can move relatively along the axial direction of the outer wall of the first installation part, so that the second accommodating part is covered on the first accommodating part, and the first tool bit and the second tool bit are in butt joint and close.

Furthermore, the rear tong head is made of an integral tubular structure, and the second accommodating part is formed by arranging a slot penetrating to the far end on the pipe wall; the external diameter of first installation department slightly is lighter than the internal diameter of back binding clip, can wear to establish in the back binding clip, first portion of acceping is for acceping the matched with slot-like structure with the second, makes the junction of first installation department and first portion of acceping form step-like structure, and preceding binding clip and back binding clip remove when first tool bit and second tool bit butt joint are closed, the distal end of second installation department is contradicted on the step-like structure.

Furthermore, the tong head assembly further comprises a clamping column, and a fixing hole for fixing the clamping column is formed in the first mounting part; the second mounting part is provided with a second guide groove which extends along the axial direction of the second mounting part and is matched with the clamping column; first installation department wears to establish during in the second installation department, the end card of card post is established in the second guide way, and can follow second guide way axial displacement.

Furthermore, the first knife edge on the front tong head and the second knife edge on the rear tong head are of saw-toothed structures matched with each other.

The biopsy forceps provided by the utility model can lock the forceps head component by arranging the self-locking piece, thereby avoiding the loss of sampling caused by the opening of the forceps head component in the conveying process; the opening of the forceps head component faces the side face, so that pathological tissues on the side face can be sampled easily, and the application range of the biopsy forceps is expanded.

Drawings

Fig. 1 is a schematic structural view of a biopsy forceps according to a first embodiment of the present invention.

Fig. 2 is an exploded view of a first embodiment of the biopsy forceps according to the present invention.

Fig. 3 is a schematic structural view of a self-locking member according to a first embodiment of the present invention.

Fig. 4 is a front sectional view of a biopsy forceps according to a first embodiment of the present invention.

Fig. 5 is a partially enlarged view of the area a in fig. 4.

Fig. 6 is an enlarged view of a partial region of the section B-B in fig. 4.

Fig. 7 is a schematic structural view of the binding clip assembly according to the first embodiment of the present invention.

Fig. 8 is an assembly view of the binding clip assembly according to the first embodiment of the present invention.

Fig. 9 is a schematic structural view of the first embodiment of the present invention when the binding clip assembly is closed.

Fig. 10 is a schematic structural view of a binding clip assembly according to a second embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured" to another element, it can be directly on the other element or intervening elements may also be present. When 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.

In the present specification, "proximal" is defined as the end closer to the operator, and "distal" is defined as the end farther from the operator. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

As shown in fig. 1 to 5, a first embodiment of the present invention provides a side sampling biopsy forceps 100, including a sliding rod 110, a sliding ring 120, a pull rod 130, a spring hose 140, a pull rope 150, a forceps head assembly 160 and a self-locking member 170, wherein a first guide groove 111 penetrating through a side wall is formed in a middle portion of the sliding rod 110, the first guide groove 111 extends axially along the sliding rod 110, and a through cavity (not shown in the drawings) penetrating through the sliding rod 110 from a distal end to the first guide groove 111 is formed in the interior of the sliding rod 110; the sliding ring 120 is movably clamped on the sliding rod 110 and can reciprocate along the first guide groove 111; the pull rod 130 is arranged in the through cavity in a penetrating way, and the near end of the pull rod penetrates into the first guide groove 111 to be fixedly connected with the slip ring 120; the proximal end of the spring hose 140 is fixed at the distal end of the slide bar 110, and the inner cavity of the spring hose is butted with the through cavity; the pull rope 150 is arranged in the spring hose 140 in a penetrating way, and the near end of the pull rope 150 is fixedly connected with the far end of the pull rod 140; the binding clip assembly 160 includes a fixed portion fixedly connected to the distal end of the spring hose 140 and a movable portion fixedly connected to the distal end of the pull cord; the self-locking component 170 comprises a head 171 and a rod 172 which are connected with each other, a through groove 1721 is arranged at the end opposite to the end where the rod 172 is connected with the head 171, a cambered surface structure 1722 with a convex middle part is arranged on the end wall along the direction of the through groove 1721, and the heights of the two ends of the cambered surface structure 1722 along the extending direction of the through groove 1721 are flush with the opening of the through groove 1721; a through hole 112 for the rod part 172 to pass through is formed in the side wall of the sliding rod 110, and the through hole penetrates into the through cavity from the outside; the end of the rod part 172 penetrates into the through cavity through the through hole 112, and the pull rod 130 can move along the axial direction when the pull rod 130 penetrates through the through groove 1721 by rotating the head part 171; when the head 171 is rotated to press the draw bar 130 against the sidewall of the through cavity by the protrusion of the arc-shaped structure 1721, the fixing portions of the draw bar 130, the pull rope 150 and the pincer head assembly 160 are locked.

The operation steps of sampling pathological tissues by using the biopsy forceps 100 provided by the embodiment are as follows, the forceps head assembly 160 is inserted into a position to be sampled in a patient; at this time, the self-locking unit 170 is rotated to make the pull rod 130 pass through the through slot 1721, and the slip ring 120 is moved back and forth along the first guide slot 111, so that the forceps head assembly 160 is opened to clamp pathological tissues and then closed; the locking of the jawset assembly is achieved by rotating the head 171 so that the protrusions of the cambered surface structure 1721 press the tie bar 130 against the side wall of the through cavity.

The utility model provides a biopsy forceps simple structure only can realize the locking of binding clip subassembly through simple operation to can avoid the sample to lose, can also prevent that the binding clip subassembly is not hard up and cause the damage to human organ.

Referring to fig. 5 and 6, further, a convex column 1723 is disposed on a side wall of the rod portion 172, an arc-shaped slot 113 formed along a circumferential direction of the through hole 112 is disposed on a side wall of the through hole 112, and the convex column 1723 is disposed in the arc-shaped slot 113. The rotation angle of the rod 172 can be controlled by the length of the arcuate slot.

It should be noted that the pull rod 130 is a rigid rod-shaped structure, the pull rope 150 has a flexible structure, and the pull rope 150 can move along with the spring hose 140; the length of the pull rod 130 is preferably such that the pull rod 130 can be inserted into the inner cavity of the spring tube 140 when the slide ring 120 is moved to the position far away from the second guide groove 111. This scheme can ensure stay cord and pull rod along axial reciprocating motion.

There are various forms that may be used for the construction of the jawarm assembly 160. Referring to fig. 7 to 9, in the present embodiment, the binding clip assembly 160 includes a front binding clip 161 and a rear binding clip 162, the front binding clip 161 includes a first mounting portion 1611, a first receiving portion 1612 and a cap 1613, which are sequentially arranged along an axial direction from a proximal end to a distal end, the first mounting portion 1611 has a tubular structure; the first receiving portion 1612 has a groove-like structure opened to the side, and a proximal end thereof communicates with the inside of the first mounting portion 1611; the cap 1613 is covered at the distal end of the first accommodating portion 1612, and the proximal end of the cap is opposite to the groove of the first accommodating portion 1612 to form a first knife opening (not shown); the rear binding clip 162 comprises a second mounting part 1621 and a second receiving part 1622 which are axially connected in sequence from the proximal end to the distal end, wherein the second mounting part 1621 has a tubular structure; the second receiving portion 1622 has a slot-shaped structure with an opening facing the side, and a second knife edge (not shown) is formed on the end wall at the distal end thereof; the front binding clip 161 can be inserted into the inner cavity of the rear binding clip 112 from the proximal end, and the rear binding clip 162 can move relatively along the axial direction of the outer wall of the first mounting portion 1611, so that the second receiving portion 1622 is covered on the first receiving portion 1612, and the first and second cutting heads are in butt joint closure.

In the using process, the rear tong head 162 is a fixing part and is fixedly connected to the far end of the spring hose; the front binding clip 161 is a movable part and is fixedly connected with the far end of the pull rope; in the clamping process, the slide rod, the spring hose and the rear tong head are axially fixed; the sliding ring 120 reciprocates along the first guiding groove 111, and in turn drives the pull rod 130, the pull rope 150 and the front binding clip 161 to move, so as to open and close the binding clip assembly, thereby clamping and/or cutting pathological tissues and storing the pathological tissues in the inner cavity of the binding clip assembly 110.

The utility model provides a binding clip subassembly opening is towards the side, easily takes a sample to the pathological tissue that is located the side to the application range of biopsy forceps has been extended.

When the front binding clip 161 is inserted into the rear binding clip 162, the opening direction of the first receiving portion 1612 is opposite to the opening direction of the second receiving portion 1622, so that the front binding clip 161 and the rear binding clip 162 can move relatively to the second receiving portion 1622 to cover the first receiving portion 1612. The second receiving portion 1622 may completely cover the first receiving portion 1612, or a gap may be formed therebetween.

Preferably, the second receiving portion 1622 completely covers the first receiving portion 1612. The scheme can effectively protect the clamped pathological tissues from being polluted by human environment in the in-vivo conveying process.

In this embodiment, the first mounting portion 1611 is a tubular structure, and the interior of the first mounting portion is communicated with the cavity of the first receiving portion 1621, which is beneficial to enlarging the accommodating space of the pathological tissue.

In an alternative embodiment of the present invention, the first mounting portion may be a solid bar-shaped structure. First installation department in this scheme is mainly to the relative movement between preceding binding clip and the back binding clip play the guide effect.

In this embodiment, the binding clip assembly 160 is made of a metal material such as stainless steel.

In order to simplify the manufacturing steps, referring to fig. 8, in this embodiment, the rear binding clip 162 is made of an integral tubular structure, and the second receiving portion 1622 is formed by providing a slot penetrating to the distal end on the tube wall; first installation department 1611's external diameter slightly is less than the internal diameter of back binding clip 162, thereby can wear to establish in the back binding clip 162, first portion 1612 is the slot-like structure with second portion 1622 matched with, thereby makes the junction of first installation department 1611 and first portion 1612 form step-like structure, and when current binding clip 161 and back binding clip 162 removed first tool bit and second tool bit butt joint closed, the distal end of back binding clip second installation department 1621 is contradicted on the step-like structure. The rear tong head 162 can be prevented from being separated from the far end of the front tong head 161 when moving along the outer wall of the front tong head 161; when the front binding clip 161 and the rear binding clip 162 are completely closed, the first receiving portion 1612 and the second receiving portion 1622 are completely matched, and no additional bulge is arranged on the outer wall structure of the first receiving portion 1612 and the second receiving portion 1622, so that damage to a human body caused by the binding clip assembly 100 in the conveying process can be reduced.

Further, the binding clip assembly 160 further includes a clamping post 163, and the first mounting portion 1611 is provided with a fixing hole 1614 for fixing the clamping post 163; a second guide groove 1623 is formed in the second mounting portion 1621 and is axially extended along the second mounting portion 1621 with respect to the clamping column 163; when the first mounting portion 1611 is inserted into the second mounting portion 1621, the end of the clamping column 163 is clamped in the second guide groove 1623 and can move axially along the second guide groove 1623. The scheme can lead the relative movement between the front binding clip 161 and the rear binding clip 162 to play a role in guiding and limiting through the matching use of the clamping column 163 and the second guide groove 1623.

The second guide groove 1623 may be formed on an inner wall of the second mounting portion 1621, or may penetrate through a side wall of the second mounting portion 1621.

In this embodiment, the second guide groove 1623 penetrates through an inner wall of the second mounting portion 1621. This scheme is favorable to the shaping and the card post installation of second guide way.

Further, there are two fixing holes 1613 and two second guide grooves 1623, respectively, and the fixing holes 1613 are symmetrically arranged on the side wall of the first mounting portion 1611 with respect to the axis; the second guide grooves 1623 are symmetrically disposed on a sidewall of the second mounting portion 1621 with respect to an axis. After the clamping column 163 is fixed in the fixing hole 1613, two ends of the clamping column are respectively clamped in the guide groove 1623. This scheme makes the direction more stable.

Further, the binding clip assembly 160 further comprises a connecting rod 164 connected to the proximal end of the front binding clip 161, wherein the connecting rod 164 is used to connect the front binding clip to the distal end of the pull cord 150.

In an alternative embodiment of the present invention, the proximal end of the front binding clip can be directly connected to the pull cord of the biopsy forceps by spot welding.

Further, the slip ring 120 includes a first assembly portion 121 and a second assembly portion 122, and the first assembly portion 121 and the second assembly portion 122 may be engaged in the second guide groove 111 in an assembling manner.

Further, the bioptome 100 also includes a handle 180 disposed at a proximal end of the slide bar 110.

Further, the handle 180 is rotatably connected to the sliding bar 110.

Specifically, the proximal end of the sliding rod 110 is provided with a connecting column 112, the handle 180 is provided with a connecting hole, and the connecting column 113 is clamped on the end wall of the proximal end of the connecting hole after penetrating through the connecting hole, so that the sliding rod 110 and the handle 180 can be screwed. In the operation process of the biopsy forceps 100 provided by the scheme, the handle 180 is held, and the sliding rod 110 is rotated relative to the handle 180, so that the direction of the forceps head assembly can be freely adjusted.

Further, the biopsy forceps 100 further comprises a protection mechanism 190, the protection mechanism 190 comprises a sheath 191 and a connection ring 192, the sheath 191 is a sleeve structure with a pipe diameter gradually decreasing from the proximal end to the distal end and is used for being sleeved outside the proximal end of the spring hose 140, and the connection ring 192 is used for connecting the sheath 191 and the spring hose 150 to the sliding rod 110. This scheme can form guard action to the spring hose, avoids inserting in-process spring hose 150 flex.

Referring to fig. 7, the second embodiment of the present invention discloses another kind of biopsy forceps, which is different from the first embodiment only in that the first blade on the front forceps head 261 and the second blade on the rear forceps head 262 are saw-toothed structures that are engaged with each other. The scheme enables the forceps head component to cut down pathological tissues more easily.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and all modifications, equivalents, improvements and the like that are made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (6)

1. A self-locking biopsy forceps is characterized by comprising a slide bar, a slide ring, a pull rod, a spring hose, a pull rope, a forceps head assembly and a self-locking piece, wherein a first guide groove penetrating through a side wall is formed in the middle of the slide bar, the first guide groove extends along the axial direction of the slide bar, and a penetrating cavity penetrating from the far end to the first guide groove is formed in the slide bar; the sliding ring is movably clamped on the sliding rod and can reciprocate along the first guide groove; the pull rod penetrates through the penetrating cavity, and the near end of the pull rod penetrates into the first guide groove to be connected with the slip ring; the near end of the spring hose is fixed at the far end of the sliding rod, and the inner cavity of the spring hose is in butt joint with the penetrating cavity; the pull rope is arranged in the spring hose in a penetrating mode, and the near end of the pull rope is fixedly connected with the far end of the pull rod; the tong head assembly comprises a fixed part and a movable part, the fixed part is connected to the far end of the spring hose, and the movable part is fixedly connected to the far end of the pull rope; the self-locking piece comprises a head part and a rod part which are connected with each other, a through groove is arranged at one end of the rod part, which is opposite to the connecting end of the head part, the end wall is provided with a cambered surface structure with a convex middle part along the direction of the through groove, and the heights of two ends of the cambered surface structure along the extending direction of the through groove are flush with the opening of the through groove; the side wall of the sliding rod is provided with a through hole for the rod part to pass through, and the through hole penetrates into the penetrating cavity from the outside; the tail end of the rod part penetrates into the through cavity through the through hole, and the pull rod can move axially when passing through the through groove by rotating the head part; the head is rotated to enable the protruding portion of the cambered surface structure to press the pull rod on the side wall of the through cavity, and the clamp head assembly can be locked.

2. The self-locking biopsy forceps according to claim 1, wherein the side wall of the rod portion is provided with a convex pillar, the side wall of the through hole is provided with an arc-shaped slot formed along the circumferential direction of the through hole, and the convex pillar is disposed in the arc-shaped slot.

3. The self-locking biopsy forceps according to claim 1, wherein the movable portion is a front forceps head, the fixed portion is a rear forceps head, the front forceps head comprises a first mounting portion, a first receiving portion and a cap, which are sequentially connected in an axial direction from a proximal end to a distal end, and the first mounting portion has a tubular structure; the first accommodating part is provided with a groove-shaped structure with an opening facing to the side surface, and the near end of the first accommodating part is communicated with the inside of the first mounting part; the cap is covered at the far end of the first accommodating part, and the near end of the cap is opposite to the slotting position of the first accommodating part to form a first knife edge; the rear binding clip comprises a second mounting part and a second accommodating part which are axially connected in sequence from the near end to the far end, and the second mounting part is of a tubular structure; the second accommodating part is provided with a groove-shaped structure with an opening facing to the side surface, and the end wall of the distal end of the second accommodating part forms a second knife edge; the front binding clip can penetrate through the inner cavity of the rear binding clip from the near end, the rear binding clip can move relatively along the axial direction of the outer wall of the first installation part, so that the second accommodating part is covered on the first accommodating part, and the first tool bit and the second tool bit are in butt joint and close.

4. The self-locking biopsy forceps according to claim 3, wherein the rear forceps head is made of an integral tubular structure, and the second accommodating portion is formed by providing a slot through the wall of the tube to the distal end; the external diameter of first installation department slightly is lighter than the internal diameter of back binding clip, can wear to establish in the back binding clip, first portion of acceping is for acceping the matched with slot-like structure with the second, makes the junction of first installation department and first portion of acceping form step-like structure, and preceding binding clip and back binding clip remove when first tool bit and second tool bit butt joint are closed, the distal end of second installation department is contradicted on the step-like structure.

5. The self-locking biopsy forceps according to claim 3, wherein the forceps head assembly further comprises a clamping column, and the first mounting portion is provided with a fixing hole for fixing the clamping column; the second mounting part is provided with a second guide groove for placing the clamping column, and the second guide groove extends along the axial direction of the second mounting part; first installation department wears to establish during in the second installation department, the end card of card post is established in the second guide way, and can follow second guide way axial displacement.

6. The self-locking biopsy forceps of claim 3, wherein the first blade on the front forceps head and the second blade on the rear forceps head are of a mutually matched saw-toothed structure.

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