Rotatable jaw seat structure for an endoscopic biopsy forceps

Abstract

This utility model discloses a rotatable forceps head base structure for endoscopic live sampling forceps, including a rotating forceps head frame and a connector. The upper end of the rotating forceps head frame is provided with a retaining sleeve, and the retaining sleeve has a locking slot. The bottom of the locking slot has a pull-down cable hole, and the inner wall of the locking slot has a raised anti-reverse retaining ring. The connector includes a fixing sleeve and a retaining head fixed to the bottom of the fixing sleeve. The fixing sleeve has a connecting slot, and the bottom of the connecting slot has an upper pull-down cable hole. The retaining head has a through hole communicating with the upper pull-down cable hole, and the outer wall of the retaining head has an anti-reverse retaining groove. When the retaining head is inserted into the locking slot, the anti-reverse retaining ring engages with the anti-reverse retaining groove, allowing the retaining sleeve to rotate relative to the retaining head. This utility model has a simple structure, is easy to assemble and operate, and allows for rapid forceps head rotation.

Description

Technical Field

[0001] This utility model relates to an endoscopic live sampling forceps, and more particularly to a rotatable forceps head base structure for an endoscopic live sampling forceps. Background Technology

[0002] Vital sampling forceps are a type of medical consumable, mainly composed of a forceps head assembly, a Bourdon tube, a pull cable, and an operating handle. The forceps head assembly includes the forceps head and the forceps head frame. The forceps head is hinged to the forceps head frame, which is fixed to the Bourdon tube as a single unit. The two ends of the pull cable are connected to a connecting pin on the forceps head and a knob on the operating handle, respectively. Pulling or releasing the pull cable through the operating handle controls the opening and closing of the forceps head. Simultaneously, rotating the knob rotates the pull cable, transmitting torque to the connecting pin, which in turn rotates the forceps head, forceps head frame, and Bourdon tube together. This method of controlling the forceps head rotation involves a large load, makes it difficult for the forceps head to rotate, and results in significant torque loss during transmission, leading to a small actual rotation angle of the forceps head after transmission, thus affecting the accuracy of the operation.

[0003] Chinese Patent No. CN219270987U, authorized on June 30, 2023, discloses a rotatable endoscopic live sample forceps, including a sample forceps shell. A rotating inner shell is rotatably connected to the inner cavity of the sample forceps shell. A sampling mechanism is disposed within the inner cavity of the rotating inner shell. A rotating mechanism is disposed on the outer surface of the sample forceps shell. The sampling mechanism includes a fixed rod, a left rotating rod, a right rotating rod, a forceps head, a left connecting strip, a right connecting strip, a fixed plate, a screw, a moving disc, a moving sleeve, and a pull rod. The rotating mechanism includes a worm gear, a lower connecting seat, a worm, and a handle. When the forceps head needs to be rotated, rotating the handle drives the worm gear to rotate, which in turn drives the worm gear to rotate. The rotation of the worm gear drives the rotating inner shell to rotate, thus rotating the forceps head. Although this sample forceps achieves independent rotation of the forceps head, the rotating mechanism has a complex structure, cumbersome assembly, and slow forceps head rotation speed, affecting sampling efficiency. Utility Model Content

[0004] This invention addresses the problems of complex rotating mechanism structure, inconvenient operation, slow clamp head rotation speed, and reduced sampling efficiency in existing rotatable endoscopic live sampling forceps. It provides a rotatable clamp head base structure for endoscopic live sampling forceps that is simple in structure, easy to assemble, convenient to operate, and allows for rapid clamp head rotation.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A rotatable forceps head base structure for endoscopic live sampling forceps of the present invention includes a rotating forceps head frame and a connector. The upper end of the rotating forceps head frame is provided with a retaining sleeve, and the retaining sleeve is provided with a snap-fit ​​slot. The bottom of the snap-fit ​​slot is provided with a pull-down cable hole, and the inner wall of the snap-fit ​​slot is provided with a raised anti-reverse retaining ring. The connector includes a fixing sleeve and a snap-fit ​​connector fixed to the bottom of the fixing sleeve. The fixing sleeve is provided with a connecting slot, and the bottom of the connecting slot is provided with an upper pull-down cable hole. The snap-fit ​​connector is provided with a through hole communicating with the upper pull-down cable hole, and the outer wall surface of the snap-fit ​​connector is provided with an anti-reverse retaining groove. When the snap-fit ​​connector is inserted into the snap-fit ​​slot, the anti-reverse retaining ring engages with the anti-reverse retaining groove, and the retaining sleeve can rotate relative to the snap-fit ​​connector. In this invention, the snap-fit ​​connector and snap-fit ​​sleeve are rotatably connected by the snap-fit ​​of the snap-fit ​​groove and the snap-fit ​​ring, realizing the rotatable connection between the pliers head frame and the connector. The spring tube in the sampling pliers is directly fixedly connected to the connector. The pliers head is hinged in the rotating mounting frame, and a connecting pin is installed on the pliers head. The two ends of the pull cable in the sampling pliers are respectively connected to the connecting pin and the knob on the sampling pliers operating handle. By rotating the knob on the sampling pliers operating handle, the torque can be transmitted to the connecting pin installed on the pliers head through the rotation of the pull cable. Then, the twisting of the connecting pin causes the pliers head and the rotating pliers head frame to rotate together relative to the connector, thereby realizing the independent rotation of the pliers head. The connection method between the pull cable and the connecting pin on the pliers head, and the method of transmitting torque to the pliers head by rotating the pull cable through the knob on the sampling pliers operating handle, are conventional methods in the field, and therefore will not be described in detail.

[0006] Preferably, the snap-fit ​​connector is cylindrical and has a radial compression deformation notch. The radial compression deformation notch allows the snap-fit ​​connector to undergo radial compression deformation when compressed, which facilitates the locking ring to engage with the locking groove.

[0007] Preferably, at least two radial extrusion deformation notches are provided.

[0008] Preferably, the outer edge of the lower opening of the card connector is provided with an outer chamfer.

[0009] Preferably, a stepped surface is provided between the lower end of the fixing sleeve and the snap-fit ​​connector, which forms a positioning stepped surface that blocks and engages with the upper end surface of the snap-fit ​​sleeve.

[0010] Preferably, the upper corner of the anti-reverse retaining ring is set as an inner chamfer.

[0011] Preferably, the snap-fit ​​slot and the pull-down cable hole form a stepped hole, and the connection slot and the pull-up cable hole form a stepped hole.

[0012] Therefore, this utility model has the following beneficial effects: (1) The rotating pliers head frame and the connector are connected by the locking groove on the connector and the locking ring on the inner wall of the locking slot. The torque is transmitted to the rotating pliers head frame by the rotation of the cable, which drives the rotating pliers head frame to rotate independently relative to the connector, thereby realizing the independent rotation of the pliers head. It is convenient to operate and the pliers head rotates quickly and accurately. (2) The structure is simple and easy to assemble by adopting the rotational connection method of the anti-reverse groove and the anti-reverse ring. Attached Figure Description

[0013] Figure 1 This is a perspective view of the present invention.

[0014] Figure 2 yes Figure 1 The exploded diagram.

[0015] Figure 3 This is a cross-sectional view of a connector.

[0016] Figure 4 This is a cross-sectional view of the rotating clamp head holder.

[0017] Figure 5 yes Figure 1 A sectional view.

[0018] In the diagram: 1. Rotating clamp head holder; 2. Connector; 3. Sleeve; 4. Snap-fit ​​slot; 5. Pull-down cable hole; 6. Anti-reverse retaining ring; 7. Fixing sleeve; 8. Connecting slot; 9. Pull-up cable hole; 10. Through hole; 11. Anti-reverse retaining groove; 12. Radial extrusion deformation notch; 13. Positioning step surface; 14. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0020] like Figures 1-5The rotatable forceps head structure of an endoscopic live sample forceps, shown, includes a rotating forceps head frame 1 and a connector 2. The upper end of the rotating forceps head frame is provided with a retaining sleeve 3, and a retaining slot 4 is provided inside the retaining sleeve. A pull-down cable hole 5 is opened at the bottom of the retaining slot. A raised anti-reverse retaining ring 6 is provided on the inner wall of the retaining slot, and the upper side corner of the anti-reverse retaining ring is chamfered. The connector includes a fixing sleeve 7 and a retaining connector 8 fixed to the bottom of the fixing sleeve. The outer edge of the lower opening of the retaining connector is chamfered. A stepped surface is provided between the lower end of the fixing sleeve and the retaining connector, and this stepped surface forms with... The upper end face of the ferrule has a positioning step surface 14 for blocking and fitting. The ferrule is cylindrical and has two symmetrical radial extrusion deformation notches 13. The fixed sleeve has a connecting slot 9. The bottom of the connecting slot has an upper pull cable hole 10. The ferrule has a through hole 11 that communicates with the upper pull cable hole. The outer wall of the ferrule has a backlash groove 12. When the ferrule is inserted into the ferrule slot, the backlash ring engages with the backlash groove, and the ferrule can rotate relative to the ferrule. The ferrule slot and the lower pull cable hole form a stepped hole, and the connecting slot and the upper pull cable hole form a stepped hole.

[0021] The assembly method of this utility model is as follows: insert the snap-fit ​​connector in the plug into the snap-fit ​​slot, so that the anti-reverse snap ring is snapped into the anti-reverse snap groove.

[0022] The method of using this utility model is as follows: the cable (not shown in the figure) in the sampling clamp passes through the connecting slot, the upper cable hole, the snap-fit ​​slot and the lower cable hole and is connected to the connecting pin (not shown in the figure) installed on the clamp head. By rotating the knob (not shown in the figure) on the operating handle of the sampling clamp, the torque can be transmitted to the connecting pin through the cable (the knob drives the cable to rotate). Then, the twisting of the connecting pin drives the clamp head and the rotating clamp head frame to rotate together relative to the fixed sleeve, thereby realizing the independent rotation of the clamp head.

[0023] The embodiments described above are merely preferred solutions of this utility model and are not intended to limit this utility model in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

Claims

1. A rotatable forceps head structure for endoscopic live sample collection forceps, characterized in that, The device includes a rotating pliers head holder (1) and a connector (2). The upper end of the rotating pliers head holder is provided with a retaining sleeve (3). The retaining sleeve is provided with a snap-fit ​​slot (4). The bottom of the snap-fit ​​slot is provided with a pull-down cable hole (5). The inner wall of the snap-fit ​​slot is provided with a raised anti-reverse retaining ring (6). The connector includes a fixing sleeve (7) and a snap-fit ​​connector (8) fixed to the bottom of the fixing sleeve. The fixing sleeve is provided with a connecting slot (9). The bottom of the connecting slot is provided with an upper pull-down cable hole (10). The snap-fit ​​connector is provided with a through hole (11) communicating with the upper pull-down cable hole. The outer wall of the snap-fit ​​connector is provided with an anti-reverse retaining groove (12). When the snap-fit ​​connector is inserted into the snap-fit ​​slot, the anti-reverse retaining ring engages with the anti-reverse retaining groove, and the retaining sleeve can rotate relative to the snap-fit ​​connector.

2. The rotatable forceps head structure of an endoscopic live-body sampling forceps according to claim 1, characterized in that, The snap-fit ​​connector is in the shape of a round tube and has a radial extrusion deformation notch (13).

3. The rotatable forceps head structure of an endoscopic live-body sampling forceps according to claim 2, characterized in that, At least two radial extrusion deformation notches are provided.

4. The rotatable forceps head structure of an endoscopic live-body sampling forceps according to claim 2, characterized in that, The outer edge of the lower opening of the card connector is chamfered.

5. The rotatable forceps head structure of an endoscopic live-body sampling forceps according to claim 1, characterized in that, The lower end of the fixed sleeve is provided with a stepped surface between it and the snap-fit ​​connector. This stepped surface forms a positioning stepped surface (14) that blocks and engages with the upper end surface of the snap-fit ​​sleeve.

6. The rotatable forceps head structure of an endoscopic live-body sampling forceps according to claim 1, characterized in that, The upper corner of the anti-reverse retaining ring is set with an inner chamfer.

7. The rotatable forceps head structure of an endoscopic live-body sampling forceps according to claim 1, characterized in that, The snap-fit ​​slot and the pull-down cable hole form a stepped hole, and the connection slot and the pull-up cable hole form a stepped hole.

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