CN222383256U - Biopsy forceps - Google Patents

Abstract

The embodiment of the utility model discloses a biopsy forceps. The biopsy forceps comprise a forceps head assembly, a handle assembly and a catheter assembly, wherein the handle assembly comprises a handle and a sliding piece, the sliding piece is slidably arranged on the handle, a clamping part is arranged on the sliding piece, a matching part is arranged on the handle, the clamping part and the matching part are mutually clamped to lock the sliding piece, the catheter assembly comprises a push-pull piece, two ends of the push-pull piece are respectively connected with the forceps head assembly and the sliding piece, the sliding piece is driven to open or close the forceps head assembly when sliding along the handle, and the forceps head assembly is locked in a closed state when the sliding piece slides to enable the clamping part and the matching part to be clamped. The biopsy forceps can effectively control the clamping and loosening of the forceps head component and prevent a sample from falling off.

Description

Biopsy forceps

Technical Field

The embodiment of the utility model relates to the field of medical instruments, in particular to a biopsy forceps.

Background

The biopsy forceps are indispensable tools for taking pathological samples in endoscopic examination, after the forceps heads of the biopsy forceps clamp a sample, operators need to keep the forceps heads of the biopsy forceps in a closed state all the time to ensure that the samples can be taken out smoothly, but most forceps heads of the biopsy forceps at present are not in fixed structures, the forceps heads are easy to loosen when the forceps heads withdraw, the samples fall off, the sampling success rate is affected, and the sampling time is prolonged.

Disclosure of utility model

The embodiment of the utility model provides a biopsy forceps which can effectively control the clamping and loosening of a forceps head component and prevent a sample from falling off.

The embodiment of the utility model provides a biopsy forceps, which comprises a forceps head assembly, a handle assembly, a catheter assembly and a pushing and pulling piece, wherein the handle assembly comprises a handle and a sliding piece, the sliding piece is slidably arranged on the handle, a clamping part is arranged on the sliding piece, a matching part is arranged on the handle, the clamping part and the matching part are mutually clamped to lock the sliding piece, the pushing and pulling piece is respectively connected with the forceps head assembly and the sliding piece at two ends, the sliding piece drives the pushing and pulling piece to open or close the forceps head assembly when sliding along the handle, and the forceps head assembly is locked in a closed state when the sliding piece slides to enable the clamping part and the matching part to be clamped.

According to the biopsy forceps disclosed by the utility model, the clamping part on the sliding part is clamped and matched with the matching part on the handle to lock the sliding part, so that the forceps head assembly clamping a sample can be kept in a closed state, the falling of the sample caused by loosening of the forceps head assembly can be effectively prevented, the sampling success rate is high, the sampling time is also effectively shortened, the structure of the biopsy forceps is effectively simplified, the additional locking part is not required, the cost is reduced, the locking, unlocking and sampling can be completed by one hand, and the difficulty of operation is simplified.

In a possible scheme, the sliding piece is arranged in the handle, the clamping part is a hook, the matching part is a first clamping table, and the sliding piece can slide to enable the hook to be clamped with the first clamping table so as to lock the sliding piece. The sliding piece can be stably locked through the mechanical cooperation of the hook and the first clamping table, and the loosening of the clamp head assembly caused by the shaking of the sliding piece and the like is prevented.

In a possible scheme, be equipped with two couples on the slider, two couples are about the central line of slider is axisymmetric setting, be equipped with the first through-hole that runs through its own on the first cassette, the slider slidable is to making two couples pass first through-hole with first cassette block. The locking stability of the sliding piece can be further improved through the cooperation of the two hooks and the first clamping table.

In a possible solution, the handle assembly further includes a first spring disposed between the sliding member and the first clamping table, and when the hook is clamped with the first clamping table, the first spring is in a compressed state and abuts against between the sliding member and the first clamping table. When the hook is separated from the first clamping table, the sliding piece rebounds under the action of the first spring, the clamp head assembly is in a natural state, and an operator can further move the sliding piece to open the clamp head assembly at the moment so as to facilitate sampling.

In one possible aspect, the handle assembly further includes an unlocking mechanism slidably disposed within the handle, the unlocking mechanism sliding to urge the hook out of the first detent to unlock the slider. The hook is separated from the first clamping table through the unlocking mechanism, and can be operated and unlocked by one hand, so that the operation is convenient.

In one possible implementation, the unlocking mechanism includes a movable plug slidably disposed in the handle, a recess is disposed on an end surface of the movable plug facing the hook, an inner wall of the recess has a slope surface inclined toward a center thereof, and the movable plug is slidable until the slope surface presses the hook to deflect toward a center line of the slider so as to be separated from the first clamping table. The hook is extruded by the concave part of the movable plug so as to be separated from the first clamping table, and the unlocking process is stable and reliable.

In a feasible scheme, still be equipped with the second card platform in the handle, the activity stopper include main part, respectively with the pressing part and the unlocking part that are connected at the both ends of main part, and with the spacing post that the unlocking part is connected, main part with spacing post all with second card platform sliding connection, the depressed part is located unlocking part, unlocking part is in first card platform with slide between the second card platform, unlocking mechanism is still including locating the second card platform with second spring between the spacing post. When an operator presses the pressing part of the movable plug, the movable plug integrally slides towards the sliding part, so that the concave part on the unlocking part of the movable plug presses the hook on the sliding part to unlock, in the process, the movable plug cannot be completely separated from the second clamping table due to the design of the limiting column, the second spring is in a compressed state, and after unlocking is finished, the movable plug automatically resets under the action of the second spring, so that the operation is convenient.

In a possible scheme, the sliding piece comprises a fixing part in sliding connection with the handle and a sleeve connected with the fixing part, the sleeve is slidably sleeved outside the handle, the clamping part is a protrusion or a groove arranged on the inner wall of the sleeve, and the matching part is a groove or a protrusion arranged on the outer wall of the handle. The sliding piece can be stably locked through the mechanical cooperation of the protrusion and the groove, and the loosening of the clamp head assembly caused by shaking and the like of the sliding piece is prevented.

In a possible scheme, the fixed part comprises a connecting plate and two clamping parts respectively connected with two sides of the connecting plate, two opposite openings are formed in the handle, two opposite clamping holes are formed in the sleeve, and the two clamping parts of the fixed part respectively penetrate through the corresponding openings of the handle to be clamped with the corresponding clamping holes of the sleeve. When the sleeve is pushed to move relative to the handle, the clamping part can drive the fixing part to move, so that the clamp head assembly is driven to be opened or closed.

In a possible scheme, be equipped with on the sleeve along a plurality of archs of circumference interval arrangement of sleeve inner wall, be equipped with on the handle along a plurality of annular grooves of axial interval arrangement of the outer wall of handle, a plurality of archs can block to any annular groove in a plurality of annular grooves. The design of the plurality of annular grooves enables the plurality of protrusions to be positioned at different axial positions according to requirements, so that the tightness degree of the clamp head assembly is adjusted.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.

FIG. 1 is a schematic overall structure of a biopsy forceps according to a first embodiment of the present utility model;

FIG. 2 is an exploded view of the bioptome of FIG. 1;

FIG. 3 is a cross-sectional view of the handle assembly of the bioptome of FIG. 1;

FIG. 4 is another cross-sectional view of the handle assembly of the bioptome of FIG. 1;

FIG. 5 is a schematic overall construction of a handle assembly of a biopsy forceps according to a second embodiment of the utility model;

FIG. 6 is an exploded view of the handle assembly of FIG. 5;

Fig. 7 is a cross-sectional view of the handle assembly of fig. 5.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and are for example, as being fixedly connected, as being detachably connected, as being integral, as being mechanically connected, as being electrically connected, as being communicatively connected, as being directly connected, as being indirectly connected through an intermediary, as being internally connected or as being in interaction with two elements, unless otherwise explicitly limited. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances. The technical scheme of the utility model is described in detail below by specific examples. The following embodiments may be combined with each other, and some embodiments may not be repeated for the same or similar concepts or processes.

Referring to fig. 1 to 3, a biopsy forceps 1000 according to a first embodiment of the present utility model includes a forceps head assembly 1100, a handle assembly 1200, and a catheter assembly 1300 for connecting the forceps head assembly 1100 and the handle assembly 1200.

The clamp head assembly 1100 includes an openable clamp head 1110 and a support 1120 coupled to the clamp head 1110.

The handle assembly 1200 includes a handle 1210 and a slider 1220. The handle 1210 has a cavity 1211 and a mating portion 1212 disposed within the cavity 1211. The slider 1220 is slidably received within the cavity 1211 of the handle 1210. The slider 1220 is provided with a locking portion 1221, and the locking portion 1221 may be locked with the mating portion 1212 to lock the slider 1220 (as shown in fig. 3).

The catheter assembly 1300 includes a push-pull member 1310 and an outer tube 1320 that is disposed over the push-pull member 1310. Both ends of the push-pull member 1310 are connected to the binding clip 1110 and the slider 1220, respectively. Both ends of the outer tube 1320 are connected to the holder 1120 and the handle 1210, respectively.

When the sliding member 1220 slides relative to the handle 1210, the sliding member 1220 drives the push-pull member 1310 to open or close the clamp head 1110, and when the sliding member 1220 slides to enable the clamping portion 1221 to be clamped with the mating portion 1212, the clamp head 1110 is locked in a closed state. Therefore, the clamp head 1110 can be effectively prevented from being loosened to cause sample falling, the sampling success rate is high, and the sampling time is effectively shortened.

In this embodiment, the head 1110 of the head assembly 1100 includes a first linkage and a second linkage. The first link mechanism includes a first link 1113 hinged to the push-pull member 1310, a first swing link 1115 hinged to the first link 1113, and a first clamping portion 1117 connected to the first swing link 1115. The first swing rod 1115 and the first clamping portion 1117 may be integrally formed, for example.

Similarly, the second linkage includes a second link 1114 hinged to the push-pull member 1310, a second swing link 1116 hinged to the second link 1114, and a second clamping portion 1118 coupled to the second swing link 1116. The second swing rod 1116 and the second clamping portion 1118 may be integrally formed, for example. The second swing link 1116 is connected with the first swing link 1115 through a rotating shaft 1119. The second clamp 1118 is opposite the first clamp 1117.

As shown in fig. 2, the holder 1120 of the binding clip assembly 1100 includes a U-shaped body portion 1121 and a connection portion 1122 connected to the bottom of the U-shaped body portion 1121. The U-shaped body 1121 is provided with a connection hole 1123 for connection with the rotation shaft 1119. The connection portion 1122 is configured to be connected to the outer tube 1320.

Thus, as the slider 1220 is pushed toward the binding clip assembly 1100, the push-pull member 1310 coupled to the slider 1220 moves forward relative to the outer tube 1320, thereby driving the first and second linkages to oscillate, during which the first and second clamping portions 1117, 1118 are moved away from each other, i.e., effecting the opening of the binding clip 1110, at which time sampling may be performed.

When the slider 1220 is pulled to move away from the binding clip assembly 1100, the push-pull member 1310 coupled to the slider 1220 moves rearward relative to the outer tube 1320, thereby driving the first linkage and the second linkage to oscillate, during which the first clamping portion 1117 and the second clamping portion 1118 approach each other, i.e., to effect a closing of the binding clip 1110, at which time a sample may be gripped.

It will be appreciated that the structure of the binding clip assembly 1100 described above is shown by way of example only and is not intended to limit the application. Other configurations of the clamp head assembly may be used by those skilled in the art and will not be described in detail herein.

In this embodiment, the push-pull member 1310 of the catheter assembly 1300 is, but is not limited to, a wire rope. To increase the connection area of the push-pull member 1310 to the binding clip 1110, it is preferable that the push-pull member 1310 is connected to the binding clip 1110 (specifically, the first link 1113 and the second link 1114) through a first sleeve 1311. It is also preferred that the push-pull member 1310 is coupled to the slider 1220 via a second sleeve 1312 to ensure that the push-pull member 1310 does not buckle when the slider 1220 is pushed forward. Optionally, a first connection tube 1313 may be sleeved on the end of the second sleeve 1312 connected to the slider 1220 to facilitate connection of the second sleeve 1312.

In this embodiment, the outer tube 1320 of the catheter assembly 1300 is configured as a spring tube to increase the flexibility and pliability of the outer tube 1320. Similarly, to facilitate connection of the outer tube 1320 to the handle 1210, one end of the outer tube 1320 is connected to the handle 1210 via a second connecting tube 1321.

Referring to fig. 2-4, in this embodiment, the handle 1210 of the handle assembly 1200 is generally cylindrical in overall shape and has a diameter configured to allow one-handed operation by an operator. The front section of the handle 1210 is provided with a receiving groove 1213 for receiving the second connection pipe 1321. The handle 1210 has a recess 1214 and a first opening 1215 in the middle thereof. In one embodiment, the recess 1214 is recessed from an outer surface of the handle 1210. The first opening 1215 extends through a side wall of the handle 1210 and communicates the recess 1214 with the cavity 1211. The mating portion 1212 is provided at the tail section of the handle 1210, i.e., the end remote from the binding clip assembly 1100.

In this embodiment, the mating portion 1212 is configured as a first detent.

More specifically, the first clip is annular and has a first through hole 1216 in a central portion thereof. The engaging portion 1221 moves toward an end away from the binding clip assembly 1100 until it passes through the first through hole 1216 and engages the first catch.

As shown in fig. 2, in the present embodiment, the slider 1220 of the handle assembly 1200 includes a base 1222, a connection plate 1223 vertically connected to one side of the base 1222, a slide button 1224 connected to the connection plate 1223, and a connection bar 1225 vertically connected to the other side of the base 1222. The clamping portion 1221 is connected to an end of the connecting strip 1225.

The connecting plate 1223 is provided with a lateral groove 1226 for accommodating the first connecting tube 1313 to fixedly connect the push-pull member 1310.

In one embodiment, as shown in fig. 2 and 4, the slide button 1224 includes a force application portion 1227 and a plug portion 1228, where the force application portion 1227 and the plug portion 1228 are preferably disposed perpendicular to each other. The force applying portion 1227 is slidably coupled with the recess 1214 of the handle 1210. The plug 1228 is connected to the connecting plate 1223 through the first opening 1215. The operator can push the slider 1220 to move by pushing the force application portion 1227 to slide the slider 1224 entirely along the groove 1214.

In this embodiment, the fastening portion 1221 is a hook. The slider 1220 is slidable to allow the hook to pass through the first through hole 1216 of the first catch (i.e., the mating portion 1212) of the handle 1210 to engage with the first catch (as shown in fig. 3) to lock the slider 1220. Preferably, the slider 1220 comprises two opposite connecting strips 1225 and, correspondingly, two clamping portions 1221. Preferably, the two engaging portions 1221 (hooks) are disposed axisymmetrically with respect to the center line of the slider 1220. By engaging the two engaging portions 1221 with the first engaging portion, locking stability of the slider 1220 can be improved.

It will be appreciated that in other embodiments, the slider 1220 may include only one engagement portion 1221, and the mating portion 1212 may not be a first annular detent, such as a semicircular or arcuate detent.

In this embodiment, the handle assembly 1200 further includes a first spring 1230. The first spring 1230 is sleeved outside the two connecting strips 1225 and is located between the base 1222 of the slider 1220 and the first clamping platform (i.e. the mating part 1212). When the engaging portion 1221 engages the mating portion 1212, the first spring 1230 is in a compressed state and abuts between the base 1222 and the mating portion 1212. When the engaging portion 1221 is disengaged from the mating portion 1212, the slider 1220 is sprung back under the action of the first spring 1230, the clamp head 1110 is in a natural state, and the operator can further move the slider 1220 to open the clamp head 1110 to obtain a sample.

To better limit the first spring 1230, as shown in fig. 2, the slider 1220 further includes two limiting strips 1229 connected to the base 1222, preferably the limiting strips 1229 are perpendicular to the base 1222, and the two limiting strips 1229 are respectively located on two sides of the connecting strips 1225 and spaced from the corresponding connecting strips 1225. The first spring 1230 is disposed between the two connecting bars 1225 and the two limiting bars 1229, and is stable and reliable. In other embodiments, the stop 1229 may be configured in other configurations, such as an annular sleeve configuration, etc.

The disengagement of the engaging portion 1221 and the mating portion 1212 of the present embodiment is achieved by the unlocking mechanism 1240. The unlocking mechanism 1240 is slidably disposed in the handle 1210, and the unlocking mechanism 1240 is adapted to slide to push the clamping portion 1221 out of the mating portion 1212 to unlock the slider 1220.

Specifically, the unlocking mechanism 1240 includes a movable plug 1241 slidably disposed within the handle 1210, and a second spring 1242 disposed between the handle 1210 and the movable plug 1241. The end surface of the movable plug 1241 facing the mating portion 1212 (also facing the clamping portion 1221) is provided with a recess 1243, and the recess 1243 has a slope 1244 inclined toward the center thereof. The movable plug 1241 is slidable to such an extent that the ramp surface 1244 presses the catch 1221 off-set toward the centerline of the slider 1220 to disengage the catch 1221 (first catch). In other words, the connecting strip 1225 is not completely rigid, at least part of its section (for example the section connected to the hook) being provided with a certain deformability.

More specifically, in this embodiment, the handle 1210 is further provided with a second detent 1217 and a second opening 1218 at the trailing end. The second deck 1217 is positioned between the second opening 1218 and the first deck and is spaced apart from one another. The second clamping platform 1217 is provided with a second through hole 1219A located in the middle and two third through holes 1219B located on two sides of the second through hole 1219A.

The movable plug 1241 comprises a columnar main body 1245, a pressing portion 1246 and an unlocking portion 1247 connected with two ends of the columnar main body 1245 respectively, and two limiting posts 1248 connected with the unlocking portion 1247 and located on two sides of the columnar main body 1245 respectively. The columnar body 1245 is slidably connected to the second through hole 1219A of the second deck 1217. The pressing portion 1246 may be received in the second opening 1218 of the handle 1210. The unlocking part 1247 is located between the first clamping table and the second clamping table 1217, and the recess part 1243 is disposed at a side of the unlocking part 1247 facing the first clamping table. The two limiting posts 1248 are slidably connected with the corresponding third through holes 1219B of the second clamping platform 1217, and each limiting post 1248 is sleeved with a second spring 1242, one end of the second spring 1242 abuts against the second clamping platform 1217, and the other end abuts against a boss at the end of the limiting post 1248.

When an operator presses the pressing portion 1246 of the movable plug 1241, the movable plug 1241 slides toward the first clamping table, so that the recess portion 1243 of the unlocking portion 1247 presses the clamping portion 1221 of the sliding member 1220 to unlock, and in this process, the movable plug 1241 cannot be completely separated from the second clamping table 1217 due to the design of the end boss of the limiting post 1248, and the second spring 1242 is in a compressed state. After unlocking is finished, the movable plug 1241 is automatically reset under the action of the second spring 1242, and the operation is convenient.

It will be appreciated that the unlocking mechanism 1240 described above is shown by way of example only. In other embodiments, variations on the unlocking mechanism 1240 may be made by those skilled in the art. For example, the second detent 1217 may not be configured, the movable plug 1241 may not be configured with the stopper 1248, and a spring may be disposed directly between the unlocking portion 1247 of the movable plug 1241 and the first detent. When the movable plug thus constructed is pressed to unlock the slider 1220, the spring is compressed, and after the unlocking is completed, the movable plug is restored under the action of the spring.

Referring to fig. 5 to 7, the biopsy forceps of the second embodiment of the present utility model is the same as the biopsy forceps 1000 of the first embodiment in that the biopsy forceps of the present embodiment also includes a forceps head assembly 1100 (not shown), a handle assembly 2200, and a catheter assembly 1300 (not shown), the handle assembly 2200 also includes a handle 2210 and a slider 2220, the slider 2220 is slidably disposed on the handle 2210, a clamping portion 2221 is also disposed on the slider 2220, a mating portion 2212 is also disposed on the handle 2210, the slider 2220 is also slidable relative to the handle 2210 to drive the push-pull member 1310 to open or close the forceps head assembly 1100, and the forceps head assembly 1100 is also locked in a closed state when the slider 2220 is slid to clamp the clamping portion 2221 with the mating portion 2212.

However, the handle assembly 2200 of the present embodiment no longer includes the first spring 1230 and the unlocking mechanism 1240, and the structure and connection relationship of the handle 2210 and the slider 2220 of the handle assembly 2200 of the present embodiment are also changed.

Specifically, the sliding member 2220 of the present embodiment includes a fixing portion 2225 slidably connected to the handle 2210, and a sleeve 2222 connected to the fixing portion 2225. The fixing portion 2225 is configured to be fixedly connected to the push-pull member 1310. The sleeve 2222 is slidably disposed over the handle 2210. The engaging portion 2221 is a protrusion provided on an inner wall of the sleeve 2222, and the mating portion 2212 is a groove provided on an outer wall of the handle 2210. When the sleeve 2222 moves relative to the handle 2210, the fixing portion 2225 is driven to move, so that the push-pull member 1310 connected with the fixing portion 2225 drives the clamp head assembly 1100 to open or close, and the sliding member 2220 can be stably locked through the clamping fit of the protrusion and the groove, so that the clamp head 1110 of the clamp head assembly 1100 is kept in a closed state, and the sample is prevented from falling off.

Preferably, the engaging portion 2221 includes a plurality of protrusions spaced along a circumferential direction of an inner wall of the sleeve 2222, and the engaging portion 2212 includes a plurality of annular grooves spaced along an axial direction of an outer wall of the handle 2210, and the plurality of protrusions may be engaged to any one of the plurality of annular grooves. Thus, the catch 2221 can be positioned at different axial positions as desired to adjust the tightness of the clamp head 1110 of the clamp head assembly 1100.

It will be appreciated that in other embodiments, the engaging portion 2221 may be a groove formed on the inner wall of the sleeve 2222, the engaging portion 2212 may be a protrusion formed on the outer wall of the handle 2210, and the locking of the sliding member 2220 by the engagement of the protrusion and the groove may be achieved.

More specifically, in this embodiment, the handle 2210 is substantially cylindrical, and the front section thereof is also provided with a receiving groove 1213 for receiving the second connection pipe 1321 to fixedly connect the outer pipe 1320. The handle 2210 has a central portion provided with two opposite elongated openings 2215 extending through the side walls thereof, the openings 2215 being in communication with the cavity 2211 of the handle 2210. The mating portion 2212, i.e. a plurality of annular grooves, is disposed at the tail section of the handle 2210. Optionally, an end cap 2217 is further provided at the tail end of the handle 2210 for sealing the cavity 2211 of the handle 2210.

The fixing portion 2225 includes a connection plate 2223 and two engaging portions 2224 connected to both sides of the connection plate 2223. The connection plate 2223 is provided with a groove 2226 for accommodating the first connection tube 1313 to fixedly connect the push-pull member 1310. The sleeve 2222 has two opposite card holes 2227. The two engaging portions 2224 of the fixing portion 2225 respectively pass through the corresponding openings 2215 of the handle 2210 and are engaged into the corresponding engaging holes 2227 of the sleeve 2222, so that the fixing portion 2225 can be driven to move by the engaging portions 2224 when the sleeve 2222 is pushed to move relative to the handle 2210, and the clamp head assembly 1100 is driven to be opened or closed.

A step portion 2228 is provided between the connection plate 2223 and the engagement portion 2224, and a width of the step portion 2228 in a radial direction of the handle 2210 is larger than an inner diameter of the handle 2210 and smaller than an outer diameter thereof, so that when the fixing portion 2225 moves toward the end cap 2217, the fixing portion 2225 is prevented from excessively moving by abutting and limiting with a wall surface of the opening 2215 on the handle 2210 through the step portion 2228.

Thus, when the operator slides the sleeve 2222 relative to the handle 2210, the fixing portion 2225 also slides along with the sleeve 2222, so as to drive the push-pull member 1310 to open or close the binding clip 1110 of the binding clip assembly 1100, and in this embodiment, through cooperation of the handle 2210 and the sliding member 2220, stepless control of the opening angle of the binding clip can be achieved, and locking can be achieved simultaneously according to a desired regulation and control of the opening angle of the binding clip.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be a direct contact between the first feature and the second feature, or an indirect contact between the first feature and the second feature through an intervening medium.

Moreover, a first feature "above," "over" and "on" a second feature may be a first feature directly above or obliquely above the second feature, or simply indicate that the first feature is higher in level 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 at a lower level than the second feature.

In the description of the present specification, reference to the description of the terms "one embodiment," "some embodiments," "examples," "particular examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

It should be noted that the above embodiments are merely for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solution described in the above embodiments may be modified or some or all of the technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present utility model.

Claims (10)

1. A biopsy forceps, comprising

A clamp head assembly;

The handle assembly comprises a handle and a sliding piece, wherein the sliding piece is slidably arranged on the handle, a clamping part is arranged on the sliding piece, a matching part is arranged on the handle, and the clamping part and the matching part are mutually clamped to lock the sliding piece;

the catheter assembly comprises a push-pull piece, and two ends of the push-pull piece are respectively connected with the clamp head assembly and the sliding piece;

The sliding piece drives the push-pull piece to open or close the clamp head assembly when sliding along the handle, and the clamp head assembly is locked in a closed state when the sliding piece slides to enable the clamping portion to be clamped with the matching portion.

2. The biopsy forceps of claim 1, wherein the slider is disposed within the handle, the engaging portion is a hook, the mating portion is a first catch, and the slider is slidable to engage the hook with the first catch to lock the slider.

3. The biopsy forceps of claim 2, wherein the slide is provided with two hooks which are axisymmetrically disposed about a centerline of the slide, the first clamping block is provided with a first through hole therethrough, and the slide is slidable to enable the two hooks to pass through the first through hole to be clamped with the first clamping block.

4. The bioptome of claim 2, wherein said handle assembly further includes a first spring disposed between said slide and said first abutment, said first spring being in a compressed state and abutting between said slide and said first abutment when said hook is engaged with said first abutment.

5. The bioptome of claim 2, wherein said handle assembly further includes an unlocking mechanism slidably disposed within said handle, said unlocking mechanism sliding to urge said hook out of said first detent to unlock said slider.

6. The bioptome of claim 5, wherein said unlocking mechanism includes a movable plug slidably disposed within said handle, an end face of said movable plug facing said hanger being provided with a recess, an inner wall of said recess having a ramp surface sloping toward its center, said movable plug being slidable to such an extent that said ramp surface presses said hanger toward a center line of said slider to disengage said first detent.

7. The biopsy forceps of claim 6, wherein a second clamping table is further arranged in the handle, the movable plug comprises a main body part, a pressing part and an unlocking part which are respectively connected with two ends of the main body part, and a limiting column connected with the unlocking part, the main body part and the limiting column are both in sliding connection with the second clamping table, the concave part is arranged on the unlocking part, the unlocking part slides between the first clamping table and the second clamping table, and the unlocking mechanism further comprises a second spring arranged between the second clamping table and the limiting column.

8. The biopsy forceps of claim 1, wherein the sliding member comprises a fixed portion slidably connected to the handle and a sleeve connected to the fixed portion, the sleeve is slidably sleeved outside the handle, the clamping portion is a protrusion or a groove formed in an inner wall of the sleeve, and the matching portion is a groove or a protrusion formed in an outer wall of the handle.

9. The biopsy forceps of claim 8, wherein the fixing portion comprises a connecting plate and two clamping portions respectively connected to two sides of the connecting plate, two opposite openings are formed in the handle, two opposite clamping holes are formed in the sleeve, and the two clamping portions of the fixing portion respectively penetrate through the corresponding openings of the handle to be clamped with the corresponding clamping holes of the sleeve.

10. The biopsy forceps of claim 8, wherein the sleeve is provided with a plurality of protrusions circumferentially spaced along an inner wall of the sleeve, the handle is provided with a plurality of annular grooves axially spaced along an outer wall of the handle, and the plurality of protrusions are engageable with any one of the plurality of annular grooves.