CN115068072A

CN115068072A - Telescopic tool

Info

Publication number: CN115068072A
Application number: CN202210897666.6A
Authority: CN
Inventors: 郭毅军; 郭以宏
Original assignee: Chongqing Xishan Science and Technology Co Ltd
Current assignee: Chongqing Xishan Science and Technology Co Ltd
Priority date: 2022-07-28
Filing date: 2022-07-28
Publication date: 2022-09-20

Abstract

The invention relates to a telescopic cutter which comprises a cutter head assembly, an inner pipe assembly, an outer pipe assembly, a control pipe assembly and an adjusting assembly. Wherein the tool bit subassembly includes adapter sleeve and tool bit, and the tool bit rotationally wears to locate the adapter sleeve. The inner pipe assembly comprises a first inner pipe and a second inner pipe which are connected in a sliding mode, and the first inner pipe is connected with the cutter head. The outer pipe subassembly cover is located outside the inner pipe subassembly, and the outer pipe subassembly includes sliding connection's first outer tube and second outer tube, and first outer tube is connected with the adapter sleeve. The control pipe assembly is arranged between the inner pipe assembly and the outer pipe assembly in a penetrating mode, the control pipe assembly is connected with the connecting sleeve, and the control pipe assembly is provided with external threads. The adjusting component is sleeved at one end, far away from the connecting sleeve, of the control pipe component, the adjusting component is provided with an internal thread matched with the external thread, and the control pipe component can move along the axial direction through the external thread and the internal thread so as to enable the inner pipe component and the outer pipe component to stretch out and draw back synchronously. The telescopic cutter can adjust the length, thereby meeting the operation requirement.

Description

Telescopic tool

Technical Field

The invention relates to the technical field of medical instruments, in particular to a telescopic cutter.

Background

With the development of medical technology, the advantages of the minimally invasive surgery, such as quick recovery after operation, etc., are gradually increased due to the small wound. In some minimally invasive surgical operations, such as spine minimally invasive surgery, cervical spine minimally invasive surgery, chest minimally invasive surgery, partial joint minimally invasive repair surgery and the like, the amount of change of the invasion depth of the cutter is large. However, the length of the tool bar of the existing telescopic tool is mostly fixed or the axial distance of the tool bit can be adjusted only slightly through the assembly clearance. When the depth of the operation position (channel) is not matched with the effective length of the cutter, or the length of the endoscope (an aperture mirror, an arthroscope, a laparoscope and the like) used together with the cutter in the operation is not matched with the length of the cutter, the length of the cutter is too long or too short to be suitable for the operation, and the length of the cutter cannot be adjusted to the optimal length suitable for the operation by a doctor, so that the operation is inconvenient for the doctor, and the operation effect is influenced.

Disclosure of Invention

Based on this, it is necessary to provide a telescopic knife, which can be flexibly telescopic to adjust the length thereof, so as to adapt to different surgical scene requirements, and improve the success rate of the surgery.

In one aspect, the present application provides a retractable tool, comprising:

the cutter head assembly comprises a connecting sleeve and a cutter head, and the cutter head can rotatably penetrate through the connecting sleeve;

the inner pipe assembly comprises a first inner pipe and a second inner pipe which are connected in a sliding mode, the first inner pipe is connected with the cutter head, and the first inner pipe and the second inner pipe are used for transmitting torque to drive the cutter head to rotate;

the outer pipe assembly is sleeved outside the inner pipe assembly and comprises a first outer pipe and a second outer pipe which are connected in a sliding mode, and the first outer pipe is connected with the connecting sleeve;

the control pipe assembly is arranged between the inner pipe assembly and the outer pipe assembly in a penetrating mode, one end of the control pipe assembly is connected with the connecting sleeve, and the other end of the control pipe assembly is provided with external threads;

the adjusting component is sleeved at one end, far away from the connecting sleeve, of the control pipe component, the adjusting component is provided with an internal thread matched with the external thread, and the control pipe component can move axially along the external thread and the internal thread to enable the inner pipe component and the outer pipe component to stretch synchronously.

The technical solution of the present application is further described below:

in one embodiment, the adjustment assembly comprises:

the gear assembly is sleeved outside the control pipe assembly and is provided with an internal thread matched with the external thread; and the number of the first and second groups,

adjust the ring gear, it establishes to adjust the ring gear outside the gear assembly, the inboard of adjusting the ring gear be equipped with the first tooth of gear assembly looks meshing, it is used for the drive to adjust the ring gear the gear assembly rotates.

In one embodiment, the first inner pipe is slidably arranged in the second inner pipe in a penetrating way, the outer periphery side of the first inner pipe is provided with a first groove extending along the axial direction, the inner side of the second inner pipe is provided with a first convex rib extending along the axial direction, and the first convex rib is slidably arranged in the first groove; and/or the first outer pipe is slidably arranged in the second outer pipe in a penetrating manner, a second groove extending along the axial direction is formed in the outer peripheral side of the first outer pipe, a second convex rib extending along the axial direction is formed in the inner side of the second outer pipe, and the second convex rib is slidably arranged in the second groove.

In one embodiment, the outer periphery of the first outer pipe and/or the second outer pipe is provided with scale marks for marking the axial sliding distance of the first outer pipe relative to the second outer pipe.

In one embodiment, the control tube assembly comprises a connecting tube and a transmission tube, one end of the connecting tube is fixedly connected with the connecting sleeve, the other end of the connecting tube is fixedly connected with the transmission tube, the external thread is arranged on the outer peripheral side of the transmission tube, and the transmission tube penetrates through the gear assembly and is in threaded fit with the gear assembly.

In one embodiment, the retractable cutter further comprises a support sleeve, and the support sleeve is sleeved outside the connecting pipe and abuts against the inner side of the first outer pipe.

In one embodiment, the retractable cutter further comprises a first supporting component and a second supporting component which are arranged at intervals, the gear component is rotatably arranged between the first supporting component and the second supporting component, one end of the adjusting gear ring is sleeved on the first supporting component, the other end of the adjusting gear ring is sleeved on the second supporting component, and the adjusting gear ring can rotate relative to the first supporting component and the second supporting component.

In one embodiment, the first support assembly is provided with a first through hole, the second support assembly is provided with a second through hole communicated with the first through hole, one end of the second outer tube, far away from the first outer tube, is fixed on the first support assembly, the transmission tube movably penetrates through the first through hole and the second through hole, and one end of the second inner tube, far away from the first inner tube, penetrates through the first through hole and the second through hole and is used for being connected with a rotary driving piece.

In one embodiment, a first elastic ring is arranged between the adjusting gear ring and the first support assembly, and a second elastic ring is arranged between the adjusting gear ring and the second support assembly.

In one embodiment, the gear assembly comprises:

the sun wheel is rotatably sleeved on the transmission pipe, and the internal thread is arranged on the inner side of the sun wheel;

one end of the supporting rod is connected with the first supporting component, and the other end of the supporting rod is connected with the second supporting component; and the number of the first and second groups,

the planet wheel is rotatably sleeved on the supporting rod and meshed with the first tooth and the sun wheel.

In one embodiment, the supporting rod comprises a first section and a second section, the diameter of the second section is larger than that of the first section, a limiting step is formed between the first section and the second section, a limiting sleeve which is spaced from the limiting step is further sleeved on the first section, and the planet wheel is sleeved between the limiting step and the limiting sleeve.

In one embodiment, both sides of the sun gear are provided with stepped grooves, at least part of the first support component is arranged in the stepped groove on one side in a penetrating manner, and at least part of the second support component is arranged in the stepped groove on the other side in a penetrating manner.

In one embodiment, the first supporting component comprises a first end sleeve and a stepped bushing, the first end sleeve is connected with the first supporting component, the end sleeve for adjusting the gear ring is arranged on the first end sleeve, one end, far away from the first outer pipe, of the second outer pipe is fixed on the first end sleeve, the first end sleeve is provided with a first connecting hole, the supporting rod is arranged in the first connecting hole in a penetrating mode, one end of the stepped bushing is arranged in the stepped groove on one side of the sun wheel in a penetrating mode, and the sun wheel is axially limited. The second supporting assembly comprises a second end sleeve and a first knife handle which are connected, the other end sleeve of the adjusting gear ring is arranged on the first knife handle, the second end sleeve is provided with a threaded hole communicated with the first connecting hole, the supporting rod is in threaded fit with the threaded hole, and one end of the second end sleeve penetrates through the stepped groove on the other side of the sun wheel to axially limit the sun wheel.

In one embodiment, the telescopic cutter further comprises a second cutter handle, the second cutter handle is rotatably connected with one end, away from the second end sleeve, of the first cutter handle, the second cutter handle is sleeved on the second inner pipe, and the second cutter handle is used for being connected with a rotary driving piece to drive the inner pipe assembly and the cutter head to rotate.

Above-mentioned telescopic cutter is through configuring the inner tube subassembly into first inner tube and the second inner tube of relative slip, configure the outer tube subassembly into first outer tube and the second outer tube of relative slip, and be connected with the adapter sleeve through the control tube subassembly, first outer tube is connected with the adapter sleeve, first inner tube is connected with the tool bit, thereby through drive control tube subassembly axial displacement, can order about first inner tube relative second inner tube along axial slip and order about first outer tube relative second outer tube along axial slip, the synchronous flexible of inner tube subassembly and outer tube subassembly has been realized promptly, and then realize adjusting the whole axial length of scalable cutter pipe, in order to satisfy various operation scene demands. Simultaneously through gear assembly and control tube subassembly screw-thread fit, and adjust ring gear and gear assembly meshing, thereby can drive gear assembly rotation through rotating the adjusting gear, thereby drive control tube subassembly axial displacement, the final tool bit subassembly and the scalable cutter pipe axial that are connected with the control tube subassembly are flexible, high durability and convenient operation is simple, and stepless adjustment can be realized with control tube subassembly screw-thread fit to the gear assembly, the length of telescopic cutter can be adjusted wantonly promptly, adjust the stroke unrestricted, and then satisfy the different demands to the length of telescopic cutter under the various operation scenes, make the operation more convenient, the success rate of the operation is improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic view of an embodiment of a retractable tool;

FIG. 2 is a cross-sectional view of the telescoping knife shown in FIG. 1;

FIG. 3 is an exploded view of an embodiment of a retractable knife tube;

FIG. 4 is a cross-sectional view of an embodiment of an inner tube assembly;

FIG. 5 is an enlarged cross-sectional view of the inner tube assembly shown in FIG. 3, taken at section C-C;

FIG. 6 is a schematic structural view of an outer tube assembly according to an embodiment;

FIG. 7 is a cross-sectional view of the outer tube assembly shown in FIG. 6;

FIG. 8 is an enlarged cross-sectional view of the outer tube assembly shown in FIG. 7, taken at section D-D;

FIG. 9 is a schematic structural diagram of a control tube assembly according to an embodiment;

FIG. 10 is a schematic structural view of the drive tube of the control tube assembly shown in FIG. 9;

FIG. 11 is a schematic structural view of a connecting tube of the control tube assembly shown in FIG. 9;

fig. 12 is a partial enlarged view of a portion a shown in fig. 2;

fig. 13 is a partially enlarged view of a portion B shown in fig. 2;

FIG. 14 is an exploded view of the telescoping control mechanism of one embodiment;

FIG. 15 is a cross-sectional view of the telescoping control mechanism according to one embodiment;

FIG. 16 is a side view of the telescoping control mechanism shown in FIG. 15;

FIG. 17 is a schematic structural view of a supporting rod according to an embodiment;

FIG. 18 is a schematic diagram of a second end sleeve according to an embodiment.

Description of reference numerals:

10. a cutter head assembly; 11. a cutter head; 111. a cutter body; 112. a second connection section; 113. a second ring groove; 12. connecting sleeves; 121. a body; 122. a first connection section; 123. a second mounting groove; 13. a second connecting member; 14. rotating the sleeve; 20. an inner tube assembly; 21. a first inner tube; 211. a first mounting hole; 212. a first groove; 22. a second inner tube; 221. a first rib; 222. a first reinforcement groove; 30. a control tube assembly; 31. a connecting pipe; 311. a first ring groove; 32. a drive tube; 321. an external thread; 322. a first mounting groove; 33. a support sleeve; 40. an outer tube assembly; 41. a first outer tube; 411. a second groove; 42. a second outer tube; 421. a second rib; 422. a second reinforcement groove; 60. a telescoping control mechanism; 61. adjusting the gear ring; 611. a first tooth; 62. a planet wheel; 63. a sun gear; 631. an internal thread; 632. a stepped groove; 64. a support bar; 641. a first stage; 642. a second section; 643. a threaded segment; 651. a first elastic ring; 652. a second elastic ring; 66. a limiting sleeve; 71. a first support assembly; 711. a first end sleeve; 712. a stepped bushing; 713. a first through hole; 714. a first connection hole; 72. a second support assembly; 721. a second end sleeve; 7211. installing threads; 7212. installing a groove; 7213. a second through hole; 7214. a threaded hole; 722. a first handle; 723. an elastic pad; 724. a second handle.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

Referring to fig. 1 and 2, one aspect of the present application provides a retractable tool. The retractable cutter of an embodiment comprises a cutter head component 10, a retractable cutter tube and a retractable control mechanism 60 matched with the retractable cutter tube, wherein the cutter head component 10 comprises a connecting sleeve 12 and a cutter head 11, and the cutter head 11 is rotatably arranged through the connecting sleeve 12. The telescopic knife tube is connected with the knife head component 10, and the telescopic control mechanism 60 is used for controlling the telescopic knife tube to stretch along the axial direction, so that the length of the telescopic knife can be flexibly adjusted to meet different operation requirements.

Specifically, in conjunction with fig. 3, the present application also provides a retractable knife tube, which in one embodiment includes a knife head assembly 10, an inner tube assembly 20, an outer tube assembly 40, and a control tube assembly 30. The cutter head assembly 10 comprises a connecting sleeve 12 and a cutter head 11, wherein the cutter head 11 is rotatably arranged through the connecting sleeve 12. The inner tube assembly 20 includes a first inner tube 21 and a second inner tube 22 slidably connected, the first inner tube 21 is connected to the cutter head 11, and the second inner tube 22 is used for transmitting torque to drive the first inner tube 21 and the cutter head 11 to rotate. The outer tube assembly 40 is sleeved outside the inner tube assembly 20, the outer tube assembly 40 includes a first outer tube 41 and a second outer tube 42 which are slidably connected, and the first outer tube 41 is connected to the connecting sleeve 12. The control tube assembly 30 is inserted between the inner tube assembly 20 and the outer tube assembly 40, the control tube assembly 30 is connected to the connecting sleeve 12, and the control tube assembly 30 can move in the axial direction to drive the first inner tube 21 to slide in the axial direction relative to the second inner tube 22 and drive the first outer tube 41 to slide in the axial direction relative to the second outer tube 42.

According to the telescopic knife tube, the inner tube assembly 20 is configured into the first inner tube 21 and the second inner tube 22 which can slide relatively, the outer tube assembly 40 is configured into the first outer tube 41 and the second outer tube 42 which can slide relatively, the control tube assembly 30 is connected with the connecting sleeve 12, the first outer tube 41 is connected with the connecting sleeve 12, and the first inner tube 21 is connected with the knife head 11, so that the control tube assembly 30 is driven to move axially, the first inner tube 21 can be driven to slide axially relative to the second inner tube 22, and the first outer tube 41 can be driven to slide axially relative to the second outer tube 42, synchronous telescopic of the inner tube assembly 20 and the outer tube assembly 40 is realized, and further, the whole axial length of the telescopic knife tube can be adjusted, so that various operation scene requirements can be met. Meanwhile, the inner tube assembly 20, the control tube assembly 30 and the outer tube assembly 40 are sequentially sleeved from inside to outside to form a three-layer structure, so that the overall strength of the telescopic knife tube is improved, the innermost inner tube assembly 20 can transmit torque, and the knife tube can flexibly stretch and does not influence the inner tube assembly 20 to drive the knife head 11 to rotate at a high speed. The outermost outer tube assembly 40 protects the body tissue and prevents the high speed rotation of the inner tube assembly 20 from scratching the body tissue.

Specifically, in the retractable knife of the present embodiment, the retractable control mechanism 60 cooperates with the retractable knife tube, and the retractable control mechanism 60 drives the control tube assembly 30 to move axially, so as to adjust the length of the retractable knife tube. In other embodiments of the retractable knife, the retractable knife tube can be used alone, and the length of the retractable guide tube can be adjusted by manually driving the control tube assembly 30 to move axially, which is not described herein.

Referring to fig. 4 and 5, in the present embodiment, the first inner tube 21 is slidably inserted into the second inner tube 22, a first groove 212 extending along the axial direction is disposed on an outer peripheral side of the first inner tube 21, a first rib 221 extending along the axial direction is disposed on an inner side of the second inner tube 22, the first rib 221 is slidably disposed in the first groove 212, and the first rib 221 is slidably disposed in the first groove 212, so that the fluency of the first inner tube 21 when axially extending and retracting relative to the second inner tube 22 is improved, meanwhile, the first rib 221 is matched with the first groove 212 to further limit the rotation of the first inner tube 21 relative to the second inner tube 22, and it is ensured that the first inner tube 21 and the second inner tube 22 can synchronously rotate, so that the torque output by the second inner tube 22 can be stably transmitted to the tool bit 11 through the first inner tube 21 to drive the tool bit 11 to rotate. Preferably, the outer peripheral side of the first inner tube 21 is provided with a plurality of first grooves 212, correspondingly, the inner side of the second inner tube 22 is provided with a plurality of first ribs 221, the first grooves 212 and the first ribs 221 are in one-to-one corresponding sliding fit, and the relative sliding stability of the first inner tube 21 and the second inner tube 22 is further improved.

It should be noted that, in other embodiments, the first inner tube 21 may also be sleeved outside the second inner tube 22, and at this time, the first rib 221 is disposed inside the first inner tube 21, and the first groove 212 is disposed on the outer peripheral side of the second inner tube 22, so as to ensure that the first inner tube 21 and the second inner tube 22 can stably extend and retract and synchronously rotate, which is not described herein again.

Preferably, in the present embodiment, the outer peripheral side of the second inner tube 22 is provided with a first reinforcement groove 222 extending in the axial direction. By providing the first reinforcing groove 222 on the outer peripheral side of the second inner tube 22 and providing the first rib 221 on the inner side of the second inner tube 22, the bending strength of the second inner tube 22 can be effectively improved, and the strength of the extendable knife pipe as a whole can be improved. Preferably, the position of the first reinforcing groove 222 corresponds to the position of the first rib 221, so that the first reinforcing groove 222 and the first rib 221 can be formed by one-time extrusion in the second inner tube 22, and the processing is simpler.

Referring to fig. 6 to 8, in the present embodiment, the first outer tube 41 is slidably inserted into the second outer tube 42, a second groove 411 extending along the axial direction is disposed on an outer peripheral side of the first outer tube 41, a second rib 421 extending along the axial direction is disposed on an inner side of the second outer tube 42, the second rib 421 is slidably disposed in the second groove 411, and the second rib 421 is slidably disposed in the second groove 411, so that smoothness of the first outer tube 41 when axially extending and retracting relative to the second outer tube 42 is improved.

It should be noted that, in other embodiments, the first outer tube 41 may also be sleeved outside the second outer tube 42, at this time, the second rib 421 is disposed inside the first outer tube 41, and the second groove 411 is disposed on the outer peripheral side of the second outer tube 42, so as to ensure that the first outer tube 41 and the second outer tube 42 can stably extend and retract, which is not described herein again.

Preferably, in the present embodiment, the outer peripheral side of the second outer tube 42 is provided with a second reinforcing groove 422 extending in the axial direction. The second reinforcing groove 422 is formed on the outer peripheral side of the second outer tube 42, and the second rib 421 is formed on the inner side of the second outer tube 42, so that the bending strength of the second outer tube 42 can be effectively improved, and the strength of the telescopic knife tube can be integrally improved. Preferably, the position of the second reinforcing groove 422 corresponds to the position of the second rib 421, so that the second reinforcing groove 422 and the second rib 421 can be formed by one-time extrusion on the second outer tube 42, and the processing is simpler.

Referring to fig. 6, scale marks are arranged on the outer peripheral sides of the first outer tube 41 and/or the second outer tube 42, and the scale marks are used for marking the axial sliding distance of the first outer tube 41 relative to the second outer tube 42, so that a doctor can accurately grasp the length of the telescopic knife handle by observing the scale marks.

Preferably, in the present embodiment, when fully retracted, the first inner tube 21 can be completely hidden in the second inner tube 22, the first outer tube 41 can be completely hidden in the second outer tube 42, and the length of the retractable knife tube when fully extended is 2 times the length of the retractable knife tube when fully retracted, which can fully meet the requirements of different surgical scenes.

Referring to fig. 12, the connection sleeve 12 includes a body 121 and a first connection section 122, a first step surface is formed at a connection portion between an outer peripheral side of the first connection section 122 and the body 121, and the first outer tube 41 is sleeved outside the first connection section 122 and abutted against the first step surface, so that the first outer tube 41 and the connection sleeve 12 are stably connected, and it is worth to say that the first outer tube 41 can also be fixedly connected with the connection sleeve 12 by welding, adhesive bonding, or threaded connection.

The connection between the inner side of the first connection section 122 and the body 121 forms a second step surface, and the control tube assembly 30 is inserted into the first connection section 122 and abuts against the second step surface, so that the control tube assembly 30 is stably connected with the connection sleeve 12, and it should be noted that the control tube assembly 30 can also be fixedly connected with the connection sleeve 12 by welding, adhesive bonding, or threaded connection.

Further, the first inner tube 21 is a solid tube body, a first mounting hole 211 is provided at one end of the first inner tube 21, the tool bit 11 includes a tool main body 111 and a second connecting section 112, a third step surface is formed at the joint of the tool main body 111 and the second connecting section 112, the first inner tube 21 is arranged in the second connecting section 112 in a penetrating manner and abutted against the third step surface, so that the first inner tube 21 is stably connected with the tool bit 11, and the first inner tube 21 and the tool bit 11 are ensured to move or rotate in a synchronous axial direction. Understandably, the first inner pipe 21 can also be fixedly connected with the connecting sleeve 12 by welding, adhesive bonding, or screw connection. It should be noted that, in other embodiments, the first inner tube 21 may be a hollow tube.

Continuing to refer to fig. 12, the connection sleeve 12 is provided with a second installation groove 123 penetrating along the radial direction, the cutting head 11 is provided with a second annular groove 113, the second annular groove 113 is communicated with the second installation groove 123, the cutting head assembly 10 further comprises a second connecting member 13, and the second connecting member 13 is arranged in the second installation groove 123 and the second annular groove 113 in a penetrating manner to limit the axial movement of the connection head 11 relative to the connection sleeve 12, so that the rotation of the connection head 11 relative to the connection sleeve 12 is not influenced while the synchronous axial movement of the cutting head 11 and the tool is ensured. Preferably, the second mounting groove 123 is a semicircular groove, and the second connecting member 13 is a semicircular key, so as to facilitate the assembly of the cutter head 11 and the connecting sleeve 12.

Further, the cutter head assembly 10 further includes a rotating sleeve 14, and the rotating sleeve 14 is disposed between the cutter head 11 and the connecting sleeve 12. The rotating sleeve 14 is used for reducing the friction force between the cutter head 11 and the connecting sleeve 12, so that the rotation of the cutter head 11 is more stable and smooth. Preferably, the rotating sleeve 14 in this embodiment is a copper sleeve, which has a small friction coefficient, and can effectively ensure that the cutter head 11 rotates smoothly, and in other embodiments, the rotating sleeve 14 may also be a bearing, etc.

Referring to fig. 9 to 11, the control tube assembly 30 includes a coupling tube 31 and a driving tube 32, the coupling tube 31 having one end connected to the coupling sleeve 12 and the other end of the coupling tube 31 connected to the driving tube 32. Specifically, the transmission pipe 32 is provided with a first mounting groove 322 penetrating along the radial direction, the connecting pipe 31 is provided with a first annular groove 311, the connecting pipe 31 at least partially penetrates through the transmission pipe 32, and the first annular groove 311 is communicated with the first mounting groove 322, the control pipe assembly 30 further comprises a first connecting piece, and the first connecting piece penetrates through the first mounting groove 322 and the first annular groove 311 to limit the axial movement of the connecting pipe 31 relative to the transmission pipe 32. Preferably, the first connecting member is a semicircular key, and the first mounting groove 322 is a semicircular groove, so that the connecting pipe 31 and the driving pipe 32 can be easily assembled. It should be noted that the connecting tube 31 can also be fixedly connected to the transmission tube 32 by welding, adhesive bonding, or screwing. In addition, the connecting tube 31 and the transmission tube 32 may be a single tube body formed integrally.

Further, referring to fig. 2 and 3, the retractable cutter further includes a support sleeve 33, the support sleeve 33 is sleeved outside the connection pipe 31 and abuts against the inner side of the first outer pipe 41, and the support sleeve 33 is used for supporting the first outer pipe 41, so that the structural strength of the first outer pipe 41 is improved, and the first outer pipe 41 and the control pipe assembly 30 are further ensured to be retracted synchronously. Preferably, the support sleeve 33 is provided in plurality, and the plurality of support sleeves 33 are spaced apart in the axial direction of the connection pipe 31. Further, a gap of 0.05mm to 0.1mm is provided between the inner tube assembly 20 and the control tube assembly 30, thereby ensuring that the inner tube assembly 20 rotates at a high speed relative to the control tube assembly 30 without friction.

Referring to fig. 2 and 13, the driving tube 32 is adapted to be in driving engagement with the telescoping control mechanism 60, and the telescoping control mechanism 60 is adapted to drive the driving tube 32 and the connecting tube 31 to move axially. Specifically, in the present embodiment, the transmission pipe 32 is in threaded fit with the telescopic control mechanism 60, so that the transmission pipe 32 can be driven to move axially by rotating the telescopic control mechanism 60, and then the connection pipe 31 is driven to move axially.

Specifically, the present application also provides a telescoping control mechanism 60. Referring to fig. 13 and 14, the telescoping control mechanism 60 of an embodiment includes an adjusting component, the adjusting component is sleeved on an end of the control tube component 30 away from the connecting sleeve 12, the adjusting component is provided with an internal thread 631, the control tube component 30 is provided with an external thread 321 matched with the internal thread 631, and the control tube component 30 can move axially through the external thread 321 and the internal thread 631 so as to enable the inner tube component 20 and the outer tube component 40 to telescope synchronously.

Preferably, in the present embodiment, the control tube assembly 30 includes the adjusting gear ring 61 and a gear assembly, the gear assembly is sleeved outside the control tube assembly 30, the internal thread 631 is disposed on an inner sidewall of the gear assembly, specifically, the gear assembly is sleeved outside the transmission tube 32 of the control tube assembly 30, and the external thread 321 is disposed on an outer sidewall of the transmission tube 32. Adjust ring gear 61 cover and establish outside the gear assembly, the inside wall of adjusting ring gear 61 is equipped with along circumference with gear assembly engaged with first tooth 611, adjusts ring gear 61 and is used for drive gear assembly to rotate to drive control pipe subassembly 30 axial displacement, and then realize that tool bit subassembly 10 and scalable cutter pipe are flexible.

Above-mentioned flexible control mechanism 60 passes through gear assembly and control tube subassembly 30 screw-thread fit, and adjust ring gear 61 and gear assembly meshing, thereby can drive gear assembly through rotating the regulating gear and rotate, thereby drive control tube subassembly 30 axial displacement, it is flexible finally to make the tool bit subassembly 10 and the scalable sword pipe axial of being connected with control tube subassembly 30, and convenient for operation is simple, and stepless adjustment can be realized with control tube subassembly 30 screw-thread fit to the gear assembly, on the basis that external screw thread 321 on control tube subassembly 30 is enough long, the length of scalable sword pipe can be adjusted wantonly, it is unrestricted to adjust the stroke, and then satisfy the different demands to the length of telescopic cutter under the various operation scenes, make the operation more convenient, improve the operation success rate.

Furthermore, the telescopic cutter further comprises a first supporting component 71 and a second supporting component 72 which are arranged at intervals, the gear component is rotatably arranged between the first supporting component 71 and the second supporting component 72, one end of the adjusting gear ring 61 is sleeved on the first supporting component 71, the other end of the adjusting gear ring 61 is sleeved on the second supporting component 72, and the adjusting gear ring 61 can rotate relative to the first supporting component 71 and the second supporting component 72. The first and

second support assemblies

71 and 72 are used to support the gear assembly and adjust the ring gear 61.

Further, referring to fig. 13, 14 and 18, the first support assembly 71 is provided with a first through hole 713, the second support assembly 72 is provided with a second through hole 7213 communicated with the first through hole 713, and one end of the second outer tube 42 away from the first outer tube 41 is fixed to the first support assembly 71, so that the second outer tube 42 is fixed to the first support assembly. One end of the second inner tube 22 far from the first inner tube 21 passes through the first through hole 713 and the second through hole 7213 and is used for connecting with the rotary driving member, so that the torque output by the rotary driving member can be transmitted to the cutter head 11 by driving the second inner tube 22 through the rotary driving member. Preferably, the rotary drive member may be a motor provided on the power handpiece. Further, the transmission tube 32 of the control tube assembly 30 is movably disposed through the first through hole 713 and the second through hole 7213. The transmission tube 32 can be movably arranged in the first through hole 713 and the second through hole 7213 in a penetrating manner, so that the transmission tube 32 can penetrate through the telescopic control mechanism 60 when moving axially, the telescopic control mechanism 60 is prevented from limiting the moving stroke of the transmission tube 32, and the telescopic adjustment of the telescopic knife tube with long distance and large amplitude can be realized.

With continued reference to fig. 13, a first elastic ring 651 is disposed between the adjusting gear ring 61 and the first supporting assembly 71, and specifically, the first elastic ring 651 is sleeved on the first supporting assembly 71 and is in contact fit with the inner side of the adjusting gear ring 61. A second elastic ring 652 is arranged between the adjusting gear ring 61 and the second supporting component 72, and specifically, the second elastic ring 652 is sleeved on the second supporting component 72 and is in contact fit with the inner side of the adjusting gear ring 61. The damping effect of the first supporting component 71 and the second supporting component 72 on the adjusting gear ring 61 can be effectively increased through the first elastic ring 651 and the second elastic ring 652, the automatic rotation of the adjusting gear is avoided, the engagement effect of the adjusting gear ring 61 and the gear component is matched, the self-locking effect of the telescopic control mechanism 60 can be effectively formed, and then the automatic retraction of the telescopic knife tube in place is avoided. Preferably, the first elastic ring 651 and the second elastic ring 652 are both O-rings.

Referring to fig. 15 and 16, the gear assembly of an embodiment includes a sun gear 63, a support rod 64, and a planet gear 62, wherein the sun gear 63 is rotatably sleeved on the control tube assembly 30, and an internal thread 631 is provided inside the sun gear 63, so that the sun gear 63 is in threaded engagement with the transmission tube 32 of the control tube assembly 30. One end and the first supporting component 71 of bracing piece 64 are connected, the other end and the second supporting component 72 of bracing piece 64 are connected, planet wheel 62 rotationally overlaps and establishes at bracing piece 64, and planet wheel 62 meshes with first tooth 611 and sun gear 63, and forward rotation adjusts ring gear 61 and can drive planet wheel 62 and rotate around the journey pole forward, and then drives sun gear 63 antiport, makes control tube subassembly 30 stretch out forward, finally realizes scalable cutter pipe extension. It will be readily appreciated that when the adjustment gear ring 61 is rotated in the reverse direction, a telescoping knife tube shortening is achieved.

Through adjusting ring gear 61 and planet wheel 62 meshing cooperation, planet wheel 62 and sun gear 63 meshing cooperation to through the gear ratio configuration that will adjust ring gear 61 and sun gear 63 to the big proportion gear ratio, can realize the flexible distance in front and back of the scalable sword pipe of quick adjustment. And the gear ratio of the planet wheel 62 and the sun wheel 63 can be selected and set according to actual requirements, so that the telescopic control mechanism 60 forms a proper adjusting multiple.

It should be noted that in another embodiment, the gear assembly may be a single gear, and the single gear is threadedly engaged with the control tube assembly 30 and engaged with the adjusting gear ring 61, so that the telescopic knife tube can be controlled to extend and retract by rotating the adjusting gear ring 61.

Referring to fig. 16, the gear assembly comprises at least two support rods 64, each support rod 64 being arranged at intervals around the circumference of the sun gear 63, each support rod 64 being sleeved with a planet wheel 62. For example, in the present embodiment, the gear assembly includes three support rods 64, the three support rods 64 are uniformly spaced around the circumference of the sun gear 63, and each support rod 64 is sleeved with one planet wheel 62, so that the three planet wheels 62 are engaged with the sun gear 63, and the transmission stability of the planet wheels 62 and the sun gear 63 is improved.

Referring to fig. 14 and 17, further, the supporting rod 64 includes a first section 641 and a second section 642, the diameter of the second section 642 is greater than that of the first section 641, a limiting step is formed between the first section 641 and the second section 642, a limiting sleeve 66 spaced from the limiting step is further sleeved on the first section 641, the planetary gear 62 is sleeved between the limiting step and the limiting sleeve 66, the planetary gear 62 can be effectively positioned by the limiting function of the limiting step and the limiting sleeve 66, the planetary gear 62 is prevented from moving along the axial direction of the supporting rod 64, and the transmission stability of the planetary gear 62 is further improved.

Referring to fig. 13 and 15, stepped grooves 632 are formed on both sides of the sun gear 63, at least a portion of the first support member 71 is inserted into the stepped groove 632 on one side, and at least a portion of the second support member 72 is inserted into the stepped groove 632 on the other side. The stepped grooves 632 on the two sides are respectively matched with the first supporting piece and the second supporting piece, so that the sun gear 63 can be effectively axially positioned, the axial movement of the sun gear 63 along the transmission pipe 32 is avoided, and the transmission stability of the sun gear 63 is further improved.

Specifically, referring to fig. 13 and 14, the first support assembly 71 includes a connecting first end housing 711 and a stepped bushing 712. Preferably, the first end cap 711 and the stepped bushing 712 may be screwed or welded or bonded or interference fit. The first end sleeve 711 is located to the pot head of adjusting ring gear 61, and the one end that the first outer tube 41 was kept away from to second outer tube 42 is fixed in first end sleeve 711, and first end sleeve 711 is equipped with first connecting hole 714, and bracing piece 64 wears to establish in first connecting hole 714, and the ladder groove 632 of the one side of sun gear 63 is worn to establish in order to carry out axial spacing to sun gear 63 to the one end of ladder bush 712.

Referring to fig. 13 and 18, the second support assembly 72 includes a second end sleeve 721 and a first shank 722 connected to each other, the other end of the adjusting ring gear 61 is sleeved on the first shank 722, the second end sleeve 721 is provided with a threaded hole 7214 corresponding to the first connection hole 714, and further, the support rod 64 further includes a threaded section 643, and the support rod 64 is in threaded engagement with the threaded hole 7214 through the threaded section 643. One end of the second end sleeve 721 is inserted into the stepped groove 632 on the other side of the sun gear 63 to axially limit the sun gear 63.

With continued reference to fig. 18, further, the second end sleeve 721 is provided with mounting threads 7211, the second end sleeve 721 is threadedly coupled to the first blade handle 722, and further, the end of the second end sleeve 721 that penetrates into the stepped slot 632 is provided with mounting grooves 7212, the mounting grooves 7212 being adapted to mate with a mounting tool, such as a screwdriver, to facilitate mounting the second segment 642 to the first blade handle 722. Of course, in other embodiments, the second sleeve 721 may be welded to the first blade shaft 722, or bonded or interference fit. Preferably, an elastic pad 723 is further disposed between the second end sleeve 721 and the first blade handle 722, and the elastic pad 723 can reduce an assembly error of each component of the telescopic control mechanism 60 in an axial direction, so that the components are more compactly matched.

Further, referring to fig. 1 and 2, the retractable cutter further includes a second handle 724, and the second handle 724 is rotatably connected to an end of the first handle 722 far away from the second end sleeve 721. Preferably, a friction sleeve is arranged between the second tool shank 724 and the first tool shank 722, so that friction between the first tool shank 722 and the second tool shank 724 is reduced. Further, the second handle 724 is sleeved on the second inner tube 22, and the second handle 724 is used for connecting the rotary driving member to drive the inner tube assembly 20 and the cutter head 11 to rotate. Specifically, the second handle 724 is used for connecting to a power handpiece, and the inner tube assembly 20 is driven to rotate by a motor on the power handpiece.

The telescopic cutter realizes the length adjustment of the telescopic cutter through the cooperation of the telescopic cutter pipe and the telescopic control mechanism 60, wherein the retractable knife tube is formed by configuring the inner tube assembly 20 as a first inner tube 21 and a second inner tube 22 which can slide relatively, configuring the outer tube assembly 40 as a first outer tube 41 and a second outer tube 42 which can slide relatively, and is connected with the connecting sleeve 12 through the control tube assembly 30, the first outer tube 41 is connected with the connecting sleeve 12, the first inner tube 21 is connected with the cutter head 11, so that the control tube assembly 30 is driven to move axially through the telescopic control mechanism 60, the first inner tube 21 is axially slid with respect to the second inner tube 22 and the first outer tube 41 is axially slid with respect to the second outer tube 42, the synchronous stretching of the inner tube assembly 20 and the outer tube assembly 40 is realized, and the whole axial length of the telescopic knife tube is adjusted, so that the requirements of various operation scenes are met. Flexible control mechanism 60 passes through gear assembly and control tube subassembly 30 screw-thread fit, and adjust ring gear 61 and gear assembly meshing, thereby can drive gear assembly through rotating the adjusting gear and rotate, thereby drive control tube subassembly 30 axial displacement, finally make the tool bit subassembly 10 and the scalable sword pipe axial that are connected with control tube subassembly 30 flexible, and convenient for operation is simple, and stepless adjustment can be realized with control tube subassembly 30 screw-thread fit to the gear assembly, the length that can stretch out and draw back the sword pipe can be adjusted wantonly, it is unrestricted to adjust the stroke, and then satisfy the different demands to the length of telescopic cutter under the various operation scenes, make the operation more convenient, and the success rate of the operation is improved.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent should be subject to the appended claims.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" 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. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Claims

1. A retractable tool, comprising:

the control pipe assembly is arranged between the inner pipe assembly and the outer pipe assembly in a penetrating mode, one end of the control pipe assembly is connected with the connecting sleeve, and the other end of the control pipe assembly is provided with external threads; and the number of the first and second groups,

2. The retractable tool as set forth in claim 1, wherein said adjustment assembly comprises:

the gear assembly is sleeved outside the control pipe assembly, and the internal thread is arranged on the inner side wall of the gear assembly; and the number of the first and second groups,

adjust the ring gear, the cover is established outside the gear assembly, the inside wall of adjusting the ring gear along circumference be equipped with the first tooth of gear assembly engaged with, it is used for the drive to adjust the ring gear the gear assembly rotates.

3. The telescopic cutter according to claim 1, wherein the first inner tube is slidably disposed through the second inner tube, an outer peripheral side of the first inner tube is provided with a first groove extending in the axial direction, an inner side of the second inner tube is provided with a first rib extending in the axial direction, and the first rib is slidably disposed in the first groove; and/or the first outer pipe is slidably arranged in the second outer pipe in a penetrating manner, a second groove extending along the axial direction is formed in the outer peripheral side of the first outer pipe, a second convex rib extending along the axial direction is formed in the inner side of the second outer pipe, and the second convex rib is slidably arranged in the second groove.

4. The retractable cutter of claim 1, wherein the outer periphery of the first outer tube and/or the second outer tube is provided with scale marks for indicating the distance of the first outer tube axially sliding relative to the second outer tube.

5. The telescopic cutter according to claim 2, wherein the control tube assembly includes a connecting tube and a transmission tube, one end of the connecting tube is fixedly connected to the connecting sleeve, the other end of the connecting tube is fixedly connected to the transmission tube, the external thread is disposed on an outer peripheral side of the transmission tube, and the transmission tube is inserted through and threadedly engaged with the gear assembly.

6. The retractable tool bit of claim 5, further comprising a support sleeve disposed about the connecting tube and abutting an inside of the first outer tube.

7. The retractable cutter of claim 5, further comprising a first support assembly and a second support assembly spaced apart from each other, wherein the gear assembly is rotatably disposed between the first support assembly and the second support assembly, one end of the adjustment gear ring is sleeved on the first support assembly, the other end of the adjustment gear ring is sleeved on the second support assembly, and the adjustment gear ring is capable of rotating relative to the first support assembly and the second support assembly.

8. The telescopic cutter as claimed in claim 7, wherein the first support assembly is provided with a first through hole, the second support assembly is provided with a second through hole communicated with the first through hole, one end of the second outer tube, which is away from the first outer tube, is fixed to the first support assembly, the transmission tube is movably inserted into the first through hole and the second through hole, and one end of the second inner tube, which is away from the first inner tube, is inserted into the first through hole and the second through hole and is used for being connected with a rotary driving member.

9. The retractable cutter of claim 8, wherein the gear assembly comprises:

the planet wheel is rotatably sleeved on the supporting rod and meshed with the first teeth and the sun wheel.

10. The telescopic cutter as claimed in claim 9, wherein the support rod includes a first section and a second section, the diameter of the second section is greater than that of the first section, a limiting step is formed between the first section and the second section, a limiting sleeve is further sleeved on the first section and spaced from the limiting step, and the planetary gear is sleeved between the limiting step and the limiting sleeve.

11. The retractable cutter of claim 9, wherein both sides of the sun gear are provided with stepped grooves, at least a portion of the first support assembly is inserted into the stepped groove on one side, and at least a portion of the second support assembly is inserted into the stepped groove on the other side.

12. The telescopic cutter of claim 11, wherein the first supporting component comprises a first end sleeve and a stepped bushing which are connected, an end sleeve of the adjusting gear ring is arranged on the first end sleeve, one end, far away from the first outer pipe, of the second outer pipe is fixed on the first end sleeve, the first end sleeve is provided with a first connecting hole, the supporting rod is arranged in the first connecting hole in a penetrating manner, one end of the stepped bushing is arranged in a penetrating manner in the stepped groove on one side of the sun gear to axially limit the sun gear.

13. The telescopic cutter as claimed in claim 12, wherein the second support assembly includes a second end sleeve and a first cutter handle connected to each other, the other end of the adjusting gear ring is connected to the first cutter handle through the second end sleeve, the second end sleeve is provided with a threaded hole communicated with the first connecting hole, the support rod is in threaded fit with the threaded hole, and one end of the second end sleeve is inserted into the stepped groove on the other side of the sun gear to axially limit the sun gear.