A clamp device

Abstract

The present invention relates to a clamp device. The clamp device of the present invention has a simple structure and is easy to assemble. While ensuring the core capacity of a large clamping force, it can be repeatedly opened and closed and can be rotated. The clamp device comprises: a clamp, a release part, a connection part and a handle part. The release part comprises: a sleeve tube, a pin, a sleeve and a drive shaft, the connection part comprises: a spring tube, an inner tube and a connection tube, and the handle part comprises: a handle rod, a slider and a wristband.

Description

Technical Field

[0001] The invention relates to a medical device for tissue hemostasis, in particular to a clip device. Background Art

[0002] With the continuous development of medical technology, digestive tract diseases are usually treated with endoscopic instrument surgery, and many of these surgeries may cause bleeding in the treatment area. To solve this problem, hemostatic clips are usually used to clamp the edges of wounds or incisions for hemostasis. The hemostatic principle is similar to surgical vascular suture or ligation. It is a mechanical method and does not cause coagulation, degeneration, or necrosis of mucosal tissue. Hemostatic clips stop bleeding by clamping the edges of bleeding tissue, and usually after the hemostatic operation, local tissues form granulomas through the inflammatory process, fall off on their own, and are discharged from the body through the digestive tract. This operation has the advantages of less damage, fast hemostasis, low incidence of rebleeding, few complications, and definite efficacy. It has become the most effective and clinically valuable method for non-surgical treatment of acute gastrointestinal bleeding in critically ill patients.

[0003] Currently, the common tissue clip devices on the market are of various types, complex structures and complicated processes. Summary of the invention

[0004] Based on this, a clamp device is provided. The clamp device of the present invention has a simple structure, is easy to assemble, and can be opened and closed repeatedly while ensuring a core capability of a large clamping force.

[0005] A clamp device,

[0006] The clamp device comprises: a clamp, a release portion, a connection portion and a handle portion.

[0007] The release part includes: a jacket tube, a pin, a sleeve and a drive shaft,

[0008] The clamp comprises two elastic clips, each clip has a tail hole at its tail end, one end of the two clips forms a clamping section that can be opened and closed, and the other end of the two clips forms a push-pull section that can move in the clip sleeve, and the clamping section can be closed under the restraint of the clip sleeve.

[0009] The rear end of the jacket tube is an openable and closable end, and two opposite sides of the jacket tube are respectively provided with strip bosses, and the tail end of the jacket tube is also provided with a prism bent toward the inside of the jacket tube.

[0010] The front end of the sleeve is provided with a pin hole, the tail ends of the two clips are inserted into the sleeve, and the pin passes through the pin hole of the sleeve and the tail holes of the two clips, so that the two clips are connected to the sleeve.

[0011] An annular groove is provided between the front end of the sleeve and the rear end of the sleeve, the annular groove is located at the front side of the strip boss, the strip boss is used to prevent the sleeve from moving backward, and the rear end of the sleeve forms a force application end for applying a force to the strip boss.

[0012] One end of the drive shaft is the drive end, which is disposed in the sleeve and limited by the rear end of the sleeve. The pin can be pushed forward by the drive end, and the sleeve can be pulled backward by the drive end. When the drive shaft is subjected to a tensile force exceeding a predetermined value, the drive end of the drive shaft can pass through the rear end of the sleeve and be separated from the sleeve.

[0013] The connecting part comprises: a spring tube and a connecting tube,

[0014] The end of the spring tube is connected to the connecting tube, the front end of the connecting tube is provided with an annular groove, the prism at the rear end of the jacket tube is located in the annular groove, so that the connecting tube is connected to the jacket tube.

[0015] By pulling the driving shaft, the sleeve can be moved backward and the rear end of the jacket tube can be opened, and the prism can be separated from the annular groove, and the strip-shaped boss can be inserted into the annular groove.

[0016] The handle portion includes: a handle bar and a slider,

[0017] One end of the driving shaft passes through the connecting tube, the spring tube and the handle rod in sequence and is connected to the sliding block. The sliding block is sleeved on the handle rod and slidably matched with the handle rod.

[0018] In the initial state, the elastic sheet can be in a closed state under the restraint of the jacket tube.

[0019] When the clamp needs to be opened: push the slider forward to drive the drive shaft, the drive end of the drive shaft pushes the pin, and the pin drives the connected sleeve and elastic clip to move forward until the elastic clip moves forward to a certain distance, the front ends of the two clips are no longer constrained by the sleeve tube and bounce away from each other, that is, the clamping section of the clamp is opened.

[0020] When the clip needs to be closed: align the open clip with the wound tissue that needs to be clamped, pull the slider backwards, drive the drive shaft to move backwards, and the drive end of the drive shaft drives the sleeve backwards in the sleeve. Since the sleeve is connected to the elastic clip through a pin, the elastic clip can be driven to move backwards and gradually retracted into the sleeve tube until the front ends of the two elastic clips are relatively closed to each other, that is, the clamping section of the clip is closed. At this time, if the slider is pushed and pulled again, the clamping section of the clip can be manipulated to open and close repeatedly. Try clamping in this way until the best clamping position is found.

[0021] When the clamp finds the best clamping point and needs to be clamped, locked and fallen off, the slider is pulled to drive the drive shaft to move. When the driving end of the drive shaft moves the tail end of the sleeve backward to the strip boss of the jacket tube, the drive shaft continues to be pulled backward. At this time, the driving end of the drive shaft drives the tail end of the sleeve to apply a force to the strip boss. Since the rear end of the jacket tube is an elastic openable and closable end, under the force of the tail end of the sleeve, the strip boss in the jacket tube is stretched open. Since the strip boss is stretched open, the sleeve can continue to move backward until the strip boss is stuck in the annular groove of the sleeve. The sleeve can no longer move backward and the position is fixed. At this time, the push-pull section of the elastic clip is completely received in the jacket tube, and the front ends of the two elastic clips are relative to each other. After the rear end of the jacket tube is stretched open, it tilts to both sides, and the bent prism set at the tail end of the jacket tube escapes from the annular groove of the connecting tube.

[0022] Apply a force again to continue pulling the slider backward. Since the strip boss of the sleeve tube has been inserted into the annular groove of the sleeve, the position of the sleeve is fixed. The driving end of the drive shaft will apply a force to the tail end of the sleeve. Here, the stress limiting hole at the tail end of the sleeve can be designed to have a certain elasticity and can be stretched open under a certain force, or designed to be relatively fragile and can be stretched, deformed or broken and cracked under a certain force. In this way, the driving end of the drive shaft can break through the stress limiting hole and disengage from the sleeve, thereby disengaging the elastic clip, sleeve tube, pin, sleeve and other components. Continue to pull the handle backward, the drive shaft and the connecting part will be disengaged from the body through the endoscope channel, and the elastic clip, sleeve tube, pin, and sleeve will be locked with each other and remain in the body to clamp the wound tissue.

[0023] In one embodiment, the front end of the jacket tube is provided with a slot, and the rear end of the clamping section of the clip is provided with an edge matching the slot. The front end of the jacket tube is also provided with a guide slot for guiding the movement of the elastic clip.

[0024] In one of the embodiments, the rear end of the jacket tube forms the openable and closable end by opening T-shaped grooves on two opposite sides. The openable and closable end can maintain elastic opening and closing within a certain deformation range, and the two strip-shaped bosses are respectively arranged between the two opposite sides separated by the T-shaped groove.

[0025] In one of the embodiments, the force-applying end of the sleeve is provided with a conical surface, and the end of the strip-shaped boss is provided with an inclined surface matching the conical surface.

[0026] In one of the embodiments, a pressure relief hole is provided on the clamping section of the clamp.

[0027] In one embodiment, a stress limiting hole is provided at the rear end of the sleeve, and the stress limiting hole is used to limit the driving end of the driving shaft. The stress limiting hole can be set to withstand stress limit. When the stress is greater than the limit, the limiting ability of the stress limiting hole will be destroyed and fail.

[0028] In one embodiment, the connecting portion further comprises an inner tube, wherein the inner tube is located inside the spring tube and is externally mounted on the driving shaft.

[0029] In one embodiment, the driving end of the driving shaft is a flat rectangle.

[0030] In one of the embodiments, the jacket tube can rotate relative to the connecting tube, and the tail ends of the two elastic clips are respectively provided with limit blocks, and the driving end of the driving shaft is located between the two limit blocks. By rotating the driving end of the driving shaft, a force can be applied to the limit blocks, thereby causing the two elastic clips to rotate.

[0031] In one of the embodiments, the handle portion further includes a sheath tube, the sheath tube is sleeved on the spring tube, and a portion of the sheath tube is fixed inside the handle rod.

[0032] In one embodiment, the handle portion further includes a wristband, and the wristband is connected to the rear end of the handle rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 Schematic diagram of a clamp device according to an embodiment of the present invention.

[0034] Figure 2 Schematic diagram of the initial state of the clamp device according to an embodiment of the present invention.

[0035] Figure 3 Schematic diagram of the clamp device of the embodiment of the present invention in the open state.

[0036] Figure 4 It is a schematic diagram of the clamp device of an embodiment of the present invention moving to the maximum position behind the sleeve and being fixed, thereby driving the clamp to close.

[0037] Figure 5 This is a schematic diagram of the driving end of the driving shaft of the clamp device according to an embodiment of the present invention destroying the rear end of the sleeve.

[0038] Figure 6 This is a schematic diagram of the driving end of the driving shaft of the clamp device according to an embodiment of the present invention stretching the rear end of the sleeve.

[0039] Figure 7 It is a schematic diagram of the elastic clip, the sleeve tube, the pin and the shaft sleeve remaining in the body of the clip device according to the embodiment of the present invention.

[0040] Figure 8 Schematic diagram of a jacket tube of a clamp device according to an embodiment of the present invention.

[0041] Fig. 9 It is a schematic diagram of an elastic clip, a pin, a sleeve and a driving shaft of a clamp device according to an embodiment of the present invention.

[0042] Fig.10 Schematic diagram of the pin connecting the sleeve and the elastic clip together.

[0043] in:

[0044] 1. Clip 11, edge 12, tail hole 13, limit block

[0045] 110, clamping section 111, pressure relief hole 120, push-pull section

[0046] 2. Release part 21, jacket tube 22, pin

[0047] 23, bushing 24, drive shaft 211, slot 212, T-slot

[0048] 213, strip boss 214, prism 215, guide slit 231, pin hole

[0049] 232, annular groove 233, conical surface 234, stress limiting hole 241, driving end

[0050] 3. Connecting part 31, connecting pipe 32, inner pipe

[0051] 33. Spring tube 311, annular groove

[0052] 4. Handle portion 41, sheath tube 42, handle rod

[0053] 43. Slider 44. Bracelet DETAILED DESCRIPTION

[0054] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0055] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0056] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0057] like Figures 1 to 4 As shown, an embodiment of the present invention provides a clip device, which includes: a clip, a release portion 2, a connection portion 3 and a handle portion 4.

[0058] The release part 2 includes a jacket tube 21 , a pin 22 , a sleeve 23 and a drive shaft 24 .

[0059] The clamp includes two elastic clips 1, each clip 1 is provided with a tail hole 12 at the tail end, one end of the two clips 1 forms an openable and closable clamping section 110, and the other end of the two clips 1 forms a push-pull section 120, the push-pull section 120 can move in the clamping sleeve 21, and the clamping section 110 can be closed under the constraint of the clamping sleeve 21.

[0060] The rear end of the jacket tube 21 is an openable and closable end. Two opposite sides of the jacket tube 21 are respectively provided with strip bosses 213 . The tail end of the jacket tube 21 is also provided with a prism 214 bent toward the inside of the jacket tube 21 .

[0061] In this embodiment, the rear end of the jacket tube 21 forms the openable and closable end by providing T-shaped grooves 212 on two opposite sides, and the two strip-shaped bosses 213 are respectively arranged between the two T-shaped grooves 212. The T-shaped groove 212 has a slender front groove body and a wider rear groove body, forming an inverted T shape.

[0062] The front end of the sleeve 23 is provided with a pin hole 231 , the tail ends of the two clips 1 are inserted into the sleeve 23 , and the pin 22 passes through the pin hole 231 of the sleeve 23 and the tail holes 12 of the two clips 1 , so that the two clips 1 are connected to the sleeve 23 .

[0063] An annular groove 232 is provided between the front end of the sleeve 23 and the rear end of the sleeve 23 . The annular groove 232 is located at the front side of the strip boss 213 . The strip boss 213 is used to prevent the sleeve 23 from moving backward. The rear end of the sleeve 23 forms a force application end for applying a force to the strip boss 213 .

[0064] One end of the drive shaft 24 is a drive end 241, and the drive end 241 of the drive shaft 24 is arranged in the sleeve 23 and limited by the tail end of the sleeve 23. The pin 22 can be pushed forward by the drive end 241, and the sleeve 23 can be pulled backward by the drive end 241. When the drive shaft 24 is subjected to a tensile force exceeding a predetermined force, the drive end 241 of the drive shaft 24 can pass through the tail end of the sleeve 23 and be separated from the sleeve 23.

[0065] The connecting portion 3 includes a spring tube 33 and a connecting tube 31 .

[0066] The end of the spring tube 33 is connected to the connecting tube 31. Specifically, the end of the spring tube 33 can be embedded in the connecting tube 31. The front end of the connecting tube 31 is provided with an annular groove 311, and the prism 214 at the rear end of the jacket tube 21 is located in the annular groove 311, so that the connecting tube 31 is connected to the jacket tube 21.

[0067] By pulling the driving shaft 24 , the sleeve 23 can be moved backward and the rear end of the jacket tube 21 can be opened, and the prism 214 can be separated from the annular groove 311 , and the strip boss 213 can be inserted into the annular groove 232 .

[0068] The handle portion 4 includes a handle rod 42 and a slider 43 .

[0069] One end of the driving shaft 24 passes through the connecting tube 31 , the spring tube 33 and the handle rod 42 in sequence and is connected to the slider 43 . The slider 43 is sleeved on the handle rod 42 and slidably cooperates with the handle rod 42 .

[0070] In the initial state, the elastic sheet can be in a closed state under the restraint of the jacket tube 21.

[0071] When the clamp needs to be opened: push the slider 43 forward to drive the drive shaft 24, the drive end 241 of the drive shaft 24 pushes the pin 22, and the pin 22 drives the connected sleeve 23 and the elastic clip 1 to move forward until the elastic clip 1 moves forward to a certain distance, the front ends of the two clips 1 are no longer constrained by the sleeve tube 21 and bounce away from each other, that is, the clamping section 110 of the clamp is opened.

[0072] When the clip needs to be closed: align the opened clip with the wound tissue to be clamped, pull the slider 43 backward, drive the drive shaft 24 to move backward, and the drive end 241 of the drive shaft 24 drives the sleeve 23 to move backward in the sleeve 23. Since the sleeve 23 is connected to the elastic clip 1 through the pin 22, the elastic clip 1 can be driven to move backward, and the elastic clip 1 is gradually retracted into the sleeve tube 21 until the front ends of the two elastic clips 1 are relatively closed to each other, that is, the clamping section 110 of the clip is closed. At this time, if the slider 43 is pushed and pulled again, the clamping section 110 of the clip can be manipulated to open and close repeatedly. Try clamping in this way until the best clamping position is found.

[0073] When the clamp finds the best clamping point and needs to be clamped and locked and fall off, the slider 43 is pulled to drive the drive shaft 24 to move. When the drive end 241 of the drive shaft 24 moves the tail end of the sleeve 23 backward to the strip boss 213 of the jacket tube 21, the drive shaft 24 is continued to be pulled backward. At this time, the drive end 241 of the drive shaft 24 drives the tail end of the sleeve 23 to apply a force to the strip boss 213. Since the rear end of the jacket tube 21 is an openable and closable end, under the force of the tail end of the sleeve 23, the strip boss 213 in the jacket tube 21 is stretched open. Since the strip boss 213 is stretched open, the sleeve 23 can continue to move backward until the strip boss 213 is stuck in the annular groove 232 of the sleeve 23. The sleeve 23 can no longer move backward and its position is fixed. At this time, the push-pull section of the elastic clip 1 is completely received in the jacket tube 21, the edge of the clip is clamped against the clamping groove of the jacket tube, and the front ends of the two elastic clips 1 are engaged with each other. The rear end of the jacket tube 21 is stretched open and tilted to both sides, and the bent prism 214 set at the rear end of the jacket tube 21 is out of the annular groove 311 of the connecting tube 31.

[0074] Apply a force again to continue pulling the slider 43 backward. Since the strip boss 213 of the jacket tube 21 has been inserted into the annular groove 232 of the sleeve 23, the position of the sleeve 23 is fixed. The driving end 241 of the driving shaft 24 will apply a force to the tail end of the sleeve 23. Here, the stress limiting hole 234 at the tail end of the sleeve 23 can be designed to have a certain elasticity and can be stretched open under a certain force, or designed to be relatively fragile and can be stretched, deformed, broken, or cracked under a certain force. In this way, the driving end of the driving shaft 24 can break through the stress limiting hole 234 and escape from the sleeve 23.

[0075] Thus, the elastic clip 1, the jacket tube 21, the pin 22, the shaft sleeve 23 and other components are separated. The handle portion 4 is continuously pulled backward, and the drive shaft 24 and the connecting portion 3 are removed from the body through the endoscope channel, and the elastic clip 1, the jacket tube 21, the pin 22, and the shaft sleeve 23 are locked with each other and remain in the body to clamp the wound tissue.

[0076] In this embodiment, the handle portion 4 further includes a hand ring 44, and the hand ring 44 is connected to the tail end of the handle rod 42. This arrangement facilitates the removal of components such as the drive shaft 24 and the connecting portion 3 from the body by pulling the hand ring 44 in the final stage.

[0077] In this embodiment, Figure 8 As shown, a guide slot 215 may be provided at the end of the jacket tube 21, and the guide slot 215 serves to guide the clip 1 when the clip 1 passes through. The guide slot 215 may be formed by providing a corresponding stopper at the opening of the front end of the jacket tube 21.

[0078] In this embodiment, Figure 8 and Fig. 9 As shown, the front end of the jacket tube 21 is provided with a slot 211, and the rear end of the clamping section 110 of the clip is provided with an edge 11 matching the slot 211. That is, each elastic clip 1 is provided with an edge 11, and by providing the edge 11, the edge 11 can be clamped in the slot 211 of the jacket tube 21, so as to fix the position of the elastic clip 1.

[0079] In this embodiment, Figure 1 As shown, the handle portion 4 further includes a sheath tube 41, a portion of which is fixed inside the handle rod 42, and the sheath tube 41 is sleeved on the spring tube 33. The sheath tube 41 may be a hose.

[0080] In this embodiment, the force-applying end of the sleeve 23 is provided with a conical surface 233, and the end of the strip boss 213 is provided with an inclined surface matching the conical surface 233. This arrangement facilitates the force-applying end of the sleeve 23 to open the strip boss 213.

[0081] In this embodiment, Figure 1 As shown, a pressure relief hole 111 is provided on the clamping section 110 of the clamp. The pressure relief hole 111 is mainly used to release air bubbles that may be formed between the tissue and the clamping piece 1 when the clamp clamps the tissue, so as to make the clamping more sufficient and tight.

[0082] In this embodiment, a stress limiting hole 234 is provided at the rear end of the sleeve 23. The stress limiting hole 234 is used to limit the driving end 241 of the driving shaft 24. The stress limiting hole 234 can be set to bear a stress limit. When the stress is greater than the limit, the limiting ability of the stress limiting hole 234 will be destroyed and fail. When designing the stress limiting hole 234, the stress threshold can be controlled by designing the wall thickness and weak points of the hole. The stress limit borne by the stress limiting hole 234 should be greater than the force of the jacket tube being stretched open.

[0083] For example, the driving end 241 of the driving shaft 24 is a rectangular block, the cross section of the other parts of the driving shaft 24 is circular, and the stress limiting hole opened at the rear end of the sleeve 23 is circular, so that the other parts of the driving shaft 24 can pass through the stress limiting hole, and the driving end 241 of the driving shaft 24 cannot pass through the stress limiting hole. When the force applied by the driving end 241 to the stress limiting hole 234 is greater than the stress limit of the stress limiting hole 234, the limiting capacity of the stress limiting hole 234 will be destroyed and fail.

[0084] In this embodiment, Figure 2 As shown, the connecting portion 3 further comprises an inner tube 32, which is located inside the spring tube 33 and is sheathed on the drive shaft 24. This helps to reduce the friction between the drive shaft 24 and the spring tube.

[0085] In this embodiment, the jacket tube 21 can rotate relative to the connecting tube 31, and the tail ends of the two elastic clips 1 are respectively provided with limit blocks 13, and the driving end 241 of the driving shaft 24 is located between the two limit blocks 13. By rotating the driving end 241 of the driving shaft 24, a force can be applied to the limit blocks 13, and the two elastic clips 1 are prompted to rotate.

[0086] With this arrangement, the driving end 241 of the driving shaft 24 can be driven to rotate by rotating the slider 43, and the two elastic clips 1 can be driven to rotate by the driving end 241. During the rotation of the elastic clip 1, the elastic clip 1 can drive the jacket tube 21 to rotate relative to the connecting tube 31.

[0087] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0088] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A clamp device, characterized in that: The clamp device comprises: a clamp, a release portion, a connection portion and a handle portion. The release part includes: a jacket tube, a pin, a sleeve and a drive shaft, The clamp comprises two elastic clips, each clip has a tail hole at its tail end, one end of the two clips forms a clamping section that can be opened and closed, and the other end of the two clips forms a push-pull section that can move in the clip sleeve, and the clamping section can be closed under the restraint of the clip sleeve. The rear end of the jacket tube is an openable and closable end, and two opposite sides of the jacket tube are respectively provided with strip bosses, and the tail end of the jacket tube is also provided with a prism bent toward the inside of the jacket tube. The front end of the sleeve is provided with a pin hole, the tail ends of the two clips are inserted into the sleeve, and the pin passes through the pin hole of the sleeve and the tail holes of the two clips, so that the two clips are connected to the sleeve. An annular groove is provided between the front end of the sleeve and the rear end of the sleeve, the annular groove is located at the front side of the strip boss, the strip boss is used to prevent the sleeve from moving backward, and the rear end of the sleeve forms a force application end for applying a force to the strip boss. One end of the drive shaft is the drive end, which is disposed in the sleeve and limited by the rear end of the sleeve. The pin can be pushed forward by the drive end, and the sleeve can be pulled backward by the drive end. When the drive shaft is subjected to a tensile force exceeding a predetermined value, the drive end of the drive shaft can pass through the rear end of the sleeve and be separated from the sleeve. The connecting part comprises: a spring tube and a connecting tube, The end of the spring tube is connected to the connecting tube, the front end of the connecting tube is provided with an annular groove, the prism at the rear end of the jacket tube is located in the annular groove, so that the connecting tube is connected to the jacket tube. By pulling the driving shaft, the sleeve can be moved backward and the rear end of the jacket tube can be opened, and the prism can be separated from the annular groove, and the strip-shaped boss can be inserted into the annular groove. The handle portion includes: a handle bar and a slider, One end of the driving shaft passes through the connecting tube, the spring tube and the handle rod in sequence and is connected to the sliding block. The sliding block is sleeved on the handle rod and slidably matched with the handle rod.

2. The clamp device according to claim 1, characterized in that The handle portion also includes a wristband, which is connected to the rear end of the handle rod.

3. The clamp device according to claim 1, characterized in that The front end of the jacket tube is provided with a slot, the tail end of the clamping section of the clip is provided with an edge matching the slot, and the front end of the jacket tube is also provided with a guide slot for guiding the movement of the elastic clip.

4. The clamp device according to claim 1, characterized in that The handle part also includes a sheath tube, which is sleeved on the spring tube, and a part of the sheath tube is fixed inside the handle rod.

5. The clamp device according to claim 1, characterized in that The rear end of the jacket tube forms the openable and closable end by opening T-shaped grooves on two opposite sides. The openable and closable end can maintain elastic opening and closing within a certain deformation range, and the two strip-shaped bosses are respectively arranged between the two opposite sides separated by the T-shaped groove.

6. The clamp device according to claim 1, characterized in that The force-applying end of the sleeve is provided with a conical surface, and the end of the strip-shaped boss is provided with an inclined surface matching the conical surface.

7. The clamp device according to claim 1, characterized in that A pressure relief hole is provided on the clamping section of the clamp.

8. The clamp device according to claim 1, characterized in that A stress limiting hole is provided at the rear end of the sleeve, and the stress limiting hole is used to limit the driving end of the driving shaft. The stress limiting hole can be set to withstand stress limit. When the stress is greater than the limit, the limiting capacity of the stress limiting hole will be destroyed and fail.

9. The clamp device according to claim 1, characterized in that The connecting portion further comprises an inner tube, which is located inside the spring tube and is sleeved on the driving shaft.

10. The clamp device according to claim 1, characterized in that The jacket tube can rotate relative to the connecting tube, and the tail ends of the two elastic clips are respectively provided with limit blocks, and the driving end of the driving shaft is located between the two limit blocks. By rotating the driving end of the driving shaft, a force can be applied to the limit blocks, and the two elastic clips can be prompted to rotate.

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