A clamping mechanism and clamping device with a head that is easy to replace

Abstract

The utility model relates to medical instrument technical field, concretely relates to a clamping piece mechanism and clamp closing instrument convenient to change head, including clamp pipe, clamping piece, fixed base and connecting shaft, the clamp pipe sleeve is connected in the outside of fixed base, and the clamping piece is fixed in one end of fixed base, the other end of fixed base is provided with open slot, and open slot extends to the direction of clamping piece, to make part fixed base divide into first elastic part and second elastic part, first elastic part is provided with first type slot, and second elastic part is provided with second type slot, and first type slot and second type slot correspond and make up and constitute the type slot of preventing retreat, the head of connecting shaft is provided with the boss of preventing retreat, and the type slot of preventing retreat and the boss of preventing retreat constitute the connection of preventing retreat, the utility model designs the quick -mounting scheme between fixed base and connecting shaft, makes the clamping piece mechanism of clamp closing instrument can be quickly and efficiently reloaded, and can reduce the probability of assembly failure, and guarantees the use stability after clamping piece mechanism reloaded.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a clamping mechanism and clamping device that facilitates head replacement. Background Technology

[0002] With the development of endoscopic technology and other related technologies, gastrointestinal bleeding is often treated using hemostatic clips. In practice, the hemostatic clip method involves inserting the clip's application mechanism into the patient's digestive tract through the endoscope's working channel. Once the clip reaches the pre-operative position within the patient's body, the handle is operated to generate clamping force, thereby stopping bleeding or closing the surgical wound.

[0003] Existing clamping mechanisms are generally connected to the handle operating unit via a conveying mechanism consisting of tubing and wire. Based on the different connection methods between the clamping mechanism and the conveying mechanism, they can be divided into two categories: integrated clamping devices and separate clamping devices. In integrated devices, both the clamping unit and the conveying mechanism are designed for single use, while in separate devices, only the clamping mechanism is a non-reusable component; its conveying mechanism can be reused repeatedly. Therefore, the clamping mechanism can be replaced, i.e., a new clamping mechanism can be loaded after the previous one is released.

[0004] For existing integrated instruments, the clamping mechanism cannot be repeatedly loaded, and the replacement of the clamping mechanism during surgery requires the entire integrated instrument to be replaced.

[0005] Existing detachable instruments suffer from drawbacks such as time-consuming and inefficient reloading of the clamping mechanism, as well as poor assembly stability. Studies have shown that the complex interface between the existing clamping and delivery mechanisms significantly increases assembly time; clinical data indicates that routine assembly can take more than 30% of the total operation time. Furthermore, the reloading process for the clamping mechanism of detachable instruments must be completed in real-time during surgery, and this time cost directly impacts surgical efficiency (prolonging operation time) and may increase the risk of tissue exposure due to operational delays. The complex interface between precision parts also makes assembly prone to failure, which can easily lead to functional abnormalities of the instrument after assembly. Utility Model Content

[0006] To address the technical problems of existing hemostatic clip devices, this utility model provides a clip mechanism and clamping device that is easy to replace. It is designed with a quick-release scheme between the fixed base and the connecting shaft, which enables the clip mechanism of the clamping device to be reloaded quickly and efficiently, reduces the probability of assembly failure, and ensures the stability of the clip mechanism after reloading.

[0007] The technical solution provided by this utility model is as follows: a clamping mechanism for easy head replacement, including a clamping tube, a clamping plate, a fixing seat, and a connecting shaft; the clamping tube is sleeved on the outside of the fixing seat, and the clamping plate is fixed to one end of the fixing seat; the other end of the fixing seat is provided with an open groove, which extends in the direction of the clamping plate, so that part of the fixing seat is divided into a first elastic segment and a second elastic segment; a first type groove is provided on the first elastic segment, and a second type groove is provided on the second elastic segment, and the first type groove and the second type groove are correspondingly spliced ​​to form a back-locking groove; the head of the connecting shaft is provided with a back-locking boss, and the back-locking groove and the back-locking boss form a back-locking connection.

[0008] Optionally, at least two inwardly protruding limiting portions are evenly provided on the clamp tube along the circumference, and the limiting portions abut against the outer wall of the fixing seat.

[0009] Optionally, a transition shaft section is provided on the connecting shaft near the anti-reverse boss; a first clearance groove is provided on the first elastic segment, and a second clearance groove is provided on the second elastic segment. The first clearance groove and the second clearance groove are combined to form a clearance mating groove, which is located at the end of the fixed seat; the transition shaft section and the clearance mating groove form a coupling fit.

[0010] Optionally, the radial dimension of the fixing seat gradually converges from one end near the clamp to the other end.

[0011] Optionally, it also includes a pin, wherein the fixing seat is provided with a hook-shaped part, and the pin passes through the tail of the clip and is hooked on the hook-shaped part.

[0012] Optionally, the tail of the clamp is provided with a hanging platform, and the inner wall of the clamp tube is provided with a step, the hanging platform being used to engage with the step.

[0013] Optionally, the fixing base is provided with a plug-in section, the plug-in section is provided with a slot with an opening, the tail of the clamp is inserted into the slot, and the opening is used to accommodate the hanging platform.

[0014] Optionally, a sleeve is fitted onto the outer side of the insertion segment, and the sleeve closes the opening.

[0015] Optionally, baffles are symmetrically arranged on the clamp tube, and the baffles form a gap with the edge of the clamp tube, through which the clamping plates pass.

[0016] A clamping device includes the aforementioned clamping mechanism with an easily interchangeable head, and further includes an operating component and a connecting component. The operating component includes a handle body with a push-pull block slidably disposed on the handle body, and a roller rotatably disposed on the handle body. The connecting component includes a flexible tube, a mandrel, and a connecting seat. The flexible tube is sleeved on the outside of the mandrel, and both ends of the flexible tube are fixedly connected to the handle body and the connecting seat, respectively. The connecting seat is detachably connected to the clamping tube. One end of the mandrel is fixedly connected to the connecting shaft, the mandrel passes through the roller and is fixedly connected to the roller, while the other end of the mandrel is fixedly connected to the push-pull block.

[0017] Beneficial effects

[0018] Compared with the prior art, the technical solution provided by this utility model has the following advantages: In view of the technical problems of defects in existing hemostatic clip instruments, this utility model designs a quick-release scheme between the fixed base and the connecting shaft, which enables the clamping mechanism of the clamping instrument to be reloaded quickly and efficiently, reduces the probability of assembly failure, and ensures the stability of the clamping mechanism after reloading. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the clamping mechanism for easy head replacement proposed in an embodiment of the present invention.

[0020] Figure 2 This is a cross-sectional view of the clamping mechanism for easy head replacement proposed in an embodiment of the present invention.

[0021] Figure 3 This is one of the structural schematic diagrams of the connecting shaft proposed in the embodiment of this utility model.

[0022] Figure 4 This is a three-dimensional structural diagram of the clamping mechanism for easy head replacement proposed in an embodiment of the present invention.

[0023] Figure 5 This is one of the structural schematic diagrams of the fixing base proposed in the embodiment of this utility model.

[0024] Figure 6 This is the second structural schematic diagram of the fixing base proposed in the embodiment of this utility model.

[0025] Figure 7 This is one of the structural schematic diagrams of the clamp tube proposed in the embodiment of this utility model.

[0026] Figure 8 This is the second schematic diagram of the clamp tube proposed in the embodiment of this utility model.

[0027] Figure 9This is the second structural schematic diagram of the connecting shaft proposed in the embodiment of this utility model.

[0028] Figure 10 This is the third structural schematic diagram of the fixing base proposed in the embodiment of this utility model.

[0029] Figure 11 This is one of the schematic diagrams of the release process proposed in the embodiments of this utility model.

[0030] Figure 12 This is the second schematic diagram of the release process proposed in this embodiment of the utility model.

[0031] Figure 13 This is a schematic diagram of the clamping device proposed in an embodiment of the present invention. Detailed Implementation

[0032] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings and embodiments.

[0033] The present application will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the utility model. Furthermore, it should be noted that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings. The terms "first," "second," etc., used in this utility model are provided for the convenience of describing the technical solution of this utility model and have no specific limiting effect; they are all general terms and do not constitute a limitation on the technical solution of this utility model. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Multiple technical solutions in the same embodiment, as well as multiple technical solutions in different embodiments, can be arranged and combined to form new technical solutions that do not contradict or conflict, all of which are within the scope of protection claimed by this utility model.

[0034] Example 1

[0035] Combined with appendix Figure 1-10 This embodiment proposes a clamping mechanism that facilitates head replacement, including a clamping tube 1, a clamping plate 2, a fixing base 3, and a connecting shaft 4.

[0036] The clamp tube 1 is sleeved on the outside of the fixing base 3, and the clamping piece 2 is fixed to one end of the fixing base 3. Both the clamping piece 2 and the clamp tube 1 can be made of metal, such as stainless steel. The clamping piece 2 has outward expansion elasticity, and the end where the clamping piece 2 is located is defined as the distal end (i.e., the attached end). Figure 1 The upper side), the other end is the proximal end (i.e., the appendix). Figure 1 (Lower side) When the fixed seat 3 moves axially within the clamp tube 1, if the fixed seat 3 moves to the distal end, the clamp 2 will open accordingly; if the fixed seat 3 moves to the proximal end, the clamp 2 will close due to the constraint of the clamp tube 1.

[0037] As attached Figure 7 and attached Figure 8 As shown, in a preferred embodiment, baffles 102 are symmetrically arranged on the clamp tube 1. The bent baffles 102 form a gap with the edge of the clamp tube 1. The clamp 2 passes through the gap, thereby restricting the clamp 2 from falling out of the cavity of the clamp tube 1. The gap can also form a rotation space between the clamp 2 and the clamp tube 1.

[0038] In a further embodiment, the baffle 102 is also provided with a lug. The size and position of the lug can adjust the size of the aforementioned gap. Thus, by selecting different lugs or clamp tubes 1 of different specifications for the baffle 102, the space for the clamp 2 to rotate can be changed, thereby further changing the restriction on the rotation of the clamp 2.

[0039] This embodiment also includes a fixing base 3 and a connecting shaft 4. The connecting shaft 4 is generally connected to the delivery mechanism of the hemostatic clip instrument to directly transmit the actions of the handle operating part, as shown in the attached figure. Figure 1 and attached Figure 3 As shown, the connecting shaft 4 is generally connected to the metal wire in the conveying mechanism. The pulling and rotating of the metal wire by the handle operating part can be transmitted to the connecting shaft 4 to realize its axial movement and rotation.

[0040] The mounting base 3 is generally made of engineering plastics with a certain degree of elasticity and strength, such as PC. (See attached image.) Figure 2 Appendix Figure 5 and attached Figure 6 As shown, the fixed base 3 is provided with an open groove 300, which extends in the direction of the clamping piece 2, so that part of the fixed base 3 is divided into a first elastic segment 301 and a second elastic segment 302; the first elastic segment 301 is provided with a first type groove, and the second elastic segment 302 is provided with a second type groove. The first type groove and the second type groove are correspondingly spliced ​​to form a backstop groove 303. The head of the connecting shaft 4 is provided with a backstop boss 400, and the backstop groove 303 and the backstop boss 400 form a backstop connection.

[0041] After the fixed seat 3 is provided with the open groove 300, the first elastic segment 301 and the second elastic segment 302 can have good elasticity. When the anti-retraction boss 400 of the head of the connecting shaft 4 is gradually inserted into the anti-retraction groove 303 on the fixed seat 3, the first elastic segment 301 and the second elastic segment 302 will move away from each other due to the force, providing space for the insertion of the anti-retraction boss 400.

[0042] After the anti-reverse boss 400 is fully inserted into the anti-reverse groove 303, the first elastic segment 301 and the second elastic segment 302 will restore their elastic deformation. At this time, the fixed seat 3 will cooperate with the connecting shaft 4. When the connecting shaft 4 moves axially, the fixed seat 3 will move axially accordingly, and the clamp 2 will open and close accordingly.

[0043] In a typical configuration, the anti-reverse groove 303 and the anti-reverse boss 400 form an interference fit. That is, after resetting, the first elastic segment 301 and the second elastic segment 302 will clamp the anti-reverse boss 400 of the connecting shaft 4. At this time, when the connecting shaft 4 rotates circumferentially, it can drive the fixed seat 3 and the clamping piece 2 to rotate circumferentially.

[0044] The contours of the anti-reverse groove 303 and the anti-reverse boss 400 should match. To achieve an anti-reverse connection, the structural contour of the anti-reverse boss 400 is generally designed so that the distal dimension is smaller than the proximal dimension, and the contour of the anti-reverse groove 303 matches it. As shown in the attached figure, the anti-reverse boss 400 can be n conical or frustum-shaped structures arranged continuously along the axial direction (n is a positive integer), ensuring that when the connecting shaft 4 moves to the distal end, the anti-reverse boss 400 can be easily inserted into the anti-reverse groove 303, while when the connecting shaft 4 moves to the proximal end, the anti-reverse boss 400 and the anti-reverse groove 303 are difficult to disengage. When n is greater than 1, the presence of multiple conical or frustum-shaped structures further enhances the stability of the connection between the connecting shaft 4 and the fixed seat 3, preventing the clamping piece 2 from being released prematurely, while ensuring the clamping force of the product.

[0045] Alternatively, the anti-reverse boss 400 can also be configured as a mechanism similar to ratchet or barbs, so that when the anti-reverse boss 400 is inserted, the anti-reverse groove 303 undergoes elastic deformation, allowing the anti-reverse boss 400 to pass through; when the anti-reverse boss 400 is fully inserted, the anti-reverse groove 303 returns to its original state, and a mechanical block is formed between the anti-reverse groove 303 and the anti-reverse boss 400 to prevent reverse withdrawal.

[0046] Understandably, the radial dimension of the fixing seat 3 must be smaller than the inner diameter of the clamp tube 1 to ensure that the first elastic segment 301 and the second elastic segment 302 have sufficient deformation space. However, if the radial dimension of the fixing seat 3 is very small overall, it will increase the difficulty of processing, manufacturing and assembly. Furthermore, an excessively small fixing seat 3 will wobble inside the clamp tube 1, causing the fixing seat 3 to be eccentric, which will further affect the insertion efficiency between the fixing seat 3 and the connecting shaft 4.

[0047] In a preferred embodiment, the radial dimension of the fixing seat 3 gradually converges from one end near the clamping piece 2 to the other end. This design allows for a relatively larger gap between the proximal end of the fixing seat 3 and the clamping tube 1, thereby ensuring that the first elastic segment 301 and the second elastic segment 302 have sufficient deformation space. However, a relatively small gap is still maintained between the distal end of the fixing seat 3 and the clamping tube 1, and the average gap between the main body of the fixing seat 3 and the clamping tube 1 is not too small, thereby reducing the processing difficulty and minimizing the shaking and eccentricity of the fixing seat 3 within the clamping tube 1.

[0048] And, as attached Figure 7 and 8As shown in the figure, in another embodiment, at least two inwardly protruding limiting portions 100 are evenly provided along the circumference of the clamp tube 1, and the limiting portions 100 abut against the outer wall of the fixing seat 3. As shown in the figure, the limiting portion 100 can be a protruding structure formed by inwardly recessing the wall surface of the clamp tube 1. The limiting portion 100 abuts against the fixing seat 3 to limit the fixing seat 3, thereby improving the situation of the fixing seat 3 shaking and eccentricity in the clamp tube 1, so as to ensure the insertion efficiency of the fixing seat 3 and the connecting shaft 4.

[0049] As can be seen from the foregoing embodiments, the anti-reverse boss 400 on the connecting shaft 4 can be fastened and clamped by the anti-reverse groove 303, so that there is sufficient friction between the connecting shaft 4 and the fixed seat 3, so that the fixed seat 3 can be rotated when the connecting shaft 4 rotates. In a preferred embodiment, a transition shaft section 401 is provided on the connecting shaft 4 near the anti-reverse boss 400; a first clearance groove is provided on the first elastic segment 301, and a second clearance groove is provided on the second elastic segment 302. The first clearance groove and the second clearance groove are combined to form a clearance fitting groove 304, which is located at the end of the fixed seat 3; the transition shaft section 401 and the clearance fitting groove 304 form a coupling fit.

[0050] Specifically, the transition shaft section 401 can be a flat square, and the inner wall contour of the clearance groove 304 is a flat hole that matches the flat square. The fit between the flat square and the flat hole can further ensure the transmission of rotational motion.

[0051] Similarly, the coupling between the transition shaft section 401 and the clearance groove 304 can also be a spline-like fit, that is, the transition shaft section 401 is provided with a protrusion, and the clearance groove 304 is provided with a corresponding groove, and the rotation is transmitted through the fit of the protrusion and the groove.

[0052] As attached Figure 9 and attached Figure 10 As shown, in a preferred embodiment, the main body of the transition shaft section 401 is cylindrical, but it is provided with at least one anti-slip surface 4011. The main body of the clearance mating groove 304 is a cylindrical hole, but at least one mating surface 3041 is provided on the inner wall of the cylindrical hole. When the transition shaft section 401 and the clearance mating groove 304 are mated, the anti-slip surface 4011 and the mating surface 3041 abut against each other to form a surface contact for transmitting force, thereby realizing the transmission of rotational motion between the connecting shaft 4 and the fixed seat 3.

[0053] The release process of clip 2 is shown in the attached figure. Figure 11 and attached Figure 12As shown, in this embodiment, when the clip 2 is not released, the clip 2 needs to be fixedly connected to the fixing seat 3. When the clip mechanism needs to be released, the clip 2 and the fixing seat 3 can be released by breaking the connection. In one embodiment, the clip mechanism also includes a pin 5, and the fixing seat 3 is provided with a hook-shaped part 305. The pin 5 passes through the tail of the clip 2 and is hooked on the hook-shaped part 305. In this embodiment, the clip 2 can be separated from the fixing seat 3 by deformation or breakage of the hook-shaped part 305. After separation, the clip 2 is constrained by the clamp tube 1 to keep the diseased tissue clamped, and the fixing seat 3 is separated from the clamp tube 1 along with the connecting shaft 4.

[0054] In actual surgery, the clamping mechanism of this embodiment, which facilitates head replacement, allows the connecting shaft 4 and the fixing seat 3 to be removed from the body simultaneously after the previous clamp 2 and clamp tube 1 are released. Subsequently, medical staff can manually remove the fixing seat 3, which is in anti-retraction cooperation with the connecting shaft 4, and then reload a modular clamp consisting of clamp tube 1, clamp 2 and fixing seat 3. The reloading process only requires inserting the connecting shaft 4 into the new fixing seat 3, thereby realizing the reloading of clamp 2.

[0055] After being released, the clamp 2 remains clamped by the clamp tube 1. Due to the lever effect, the tail of the clamp 2 will tilt upwards. In a preferred embodiment, a hanging platform 200 is provided at the tail of the clamp 2, and a step 101 is provided on the inner wall of the clamp tube 1. In this embodiment, the tilting of the tail of the clamp 2 can be cleverly utilized so that the hanging platform 200 can engage with the step 101, thereby fixing the open tail of the clamp 2 and preventing the clamp 2 from detaching from the clamp tube 1 at the distal end.

[0056] In a further embodiment, the fixing base 3 is provided with a plug-in section 306, and the plug-in section 306 is provided with a slot 307 with an opening. The tail of the clip 2 is inserted into the slot 307, and the opening is used to accommodate the mounting platform 200. In this embodiment, the clip 2 can be inserted into the slot 307 first. The opening of the slot 307 is used to avoid interference with the mounting platform 200. At the same time, the cooperation between the clip 2 and the slot 307, as well as the cooperation between the mounting platform 200 and the opening, achieves effective positioning between the clip 2 and the fixing base 3. Then, the connection between the clip 2 and the fixing base 3 is achieved by the pin 5, thereby further improving the convenience of assembly between the clip 2 and the fixing base 3.

[0057] Furthermore, a sleeve 6 can be fitted onto the outer side of the insertion section 306, thereby sealing the opening of the slot 307 through the sleeve 6, thus further preventing the clip 2 from loosening from the connecting seat 82 and strengthening the stability of the connection between the clip 2 and the fixing seat 3.

[0058] Example 2

[0059] Combined with appendix Figure 13This embodiment proposes a clamping device, including the clamping plate mechanism for easy head replacement described in the technical solution of embodiment 1, and also includes an operating component and a connecting component.

[0060] The operating components include a handle body 70, a push-pull block 71 slidably mounted on the handle body 70, and a roller 72 rotatably mounted on the handle body 70. The connecting components include a flexible tube 80, a spindle 81, and a connecting seat 82. The flexible tube 80 is sleeved on the outside of the spindle 81, and both ends of the flexible tube 80 are fixedly connected to the handle body 70 and the connecting seat 82, respectively. The connecting seat 82 can be detached from the clamp tube 1. One end of the spindle 81 is fixedly connected to the connecting shaft 4, and the spindle 81 passes through the roller 72 and is fixedly connected to the roller 72. At the same time, the other end of the spindle 81 is fixedly connected to the push-pull block 71.

[0061] In this embodiment, the connection seat 82 and the clamp tube 1 can be detached, meaning that the two can be detached by means of snapping, magnetic attraction or other methods. They can also be fixed to each other but detached by means of structural destruction. The purpose of the detachable connection is that after the clamp 2 is released, the connection seat 82 can be detached from the clamp tube 1 together with the connection shaft 4 and the fixed seat 3.

[0062] The working principle of the clamping device in this embodiment is as follows: The operator holds the operating component, and the connecting component is inserted near the affected area through the endoscope's working channel. The push-pull block 71 can control the pulling motion of the spindle 81, thereby controlling the axial movement of the fixing seat 3 through the connecting shaft 4, so that the clamp 2 opens or closes. At the same time, the rotation of the roller 72 drives the spindle 81 to rotate, thereby driving the fixing seat 3 and the clamp 2 to rotate synchronously through the connecting shaft 4, so as to adjust the position and angle of the clamp 2.

[0063] After the clip 2 clamps the affected area, continue pulling the push-pull block 71 to fully retract the clip 2 into the clamp tube 1, and break the connection between the fixing seat 3 and the clip 2, so that the clip 2 is disengaged from the fixing seat 3. At the same time, pull the entire connecting assembly to disengage the connecting seat 82 from the clamp tube 1, thereby completely releasing the clip 2.

[0064] The connecting assembly is then removed from the endoscope working channel, and the retaining seat 3 of the previous clamping mechanism remaining on the connecting shaft 4 is removed. The new clamping mechanism is then removed, and the connecting shaft 4 is inserted into the new retaining seat 3 to achieve reloading and subsequent surgical operations.

[0065] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A clamping mechanism for easy head changing, characterized in that, It includes a clamp tube (1), a clamping plate (2), a fixing seat (3), and a connecting shaft (4); The clamp tube (1) is sleeved on the outside of the fixing seat (3), and the clamp (2) is fixed to one end of the fixing seat (3); The other end of the fixed seat (3) is provided with an open groove (300), which extends in the direction of the clamp (2) so that part of the fixed seat (3) is divided into a first elastic segment (301) and a second elastic segment (302). The first elastic segment (301) is provided with a first groove, and the second elastic segment (302) is provided with a second groove. The first groove and the second groove are respectively spliced ​​together to form a backstop groove (303). The head of the connecting shaft (4) is provided with a backstop boss (400), and the backstop groove (303) and the backstop boss (400) form a backstop connection.

2. The clamping mechanism for easy head changing according to claim 1, characterized in that, At least two inwardly protruding limiting parts (100) are evenly arranged along the circumference of the clamp tube (1), and the limiting parts (100) abut against the outer wall of the fixing seat (3).

3. The clamping mechanism for easy head changing according to claim 1, characterized in that, A transition shaft section (401) is provided on the connecting shaft (4) near the anti-reverse boss (400). The first elastic segment (301) is provided with a first clearance groove, and the second elastic segment (302) is provided with a second clearance groove. The first clearance groove and the second clearance groove are combined to form a clearance mating groove (304). The clearance mating groove (304) is located at the end of the fixed base (3). The transition shaft section (401) and the clearance groove (304) form a coupling fit.

4. The clamping mechanism for easy head changing according to claim 1, characterized in that, The radial dimension of the fixing seat (3) gradually converges from one end near the clamp (2) to the other end.

5. The clamping mechanism for easy head changing according to claim 1, characterized in that, It also includes a pin (5), and the fixing seat (3) is provided with a hook-shaped part (305). The pin (5) passes through the tail of the clip (2) and is hooked on the hook-shaped part (305).

6. A clamping mechanism for easy head changing according to claim 1 or 5, characterized in that, The clamp (2) is provided with a hanging platform (200) at its tail end, and a step (101) is provided on the inner wall of the clamp tube (1). The hanging platform (200) is used to engage with the step (101).

7. The clamping mechanism for easy head changing according to claim 6, characterized in that, The fixed base (3) is provided with a plug section (306), and the plug section (306) is provided with a slot (307) with an opening. The tail of the clip (2) is inserted into the slot (307), and the opening is used to accommodate the hanging platform (200).

8. The clamping mechanism for easy head changing according to claim 7, characterized in that, A sleeve (6) is fitted onto the outside of the insertion section (306), and the sleeve (6) closes the opening.

9. A clamping mechanism for easy head changing according to claim 1, characterized in that, A baffle (102) is symmetrically arranged on the clamp tube (1), and the baffle (102) forms a gap with the edge of the clamp tube (1), and the clamp (2) passes through the gap.

10. A clamping device, comprising a clamping plate mechanism for easy head replacement as described in any one of claims 1-9, characterized in that, It also includes operation components and connection components; The operating component includes a handle body (70), a push-pull block (71) is slidably disposed on the handle body (70), and a roller (72) is rotatably disposed on the handle body (70). The connecting assembly includes a flexible tube (80), a spindle (81), and a connecting seat (82). The flexible tube (80) is sleeved on the outside of the spindle (81), and both ends of the flexible tube (80) are fixedly connected to the handle body (70) and the connecting seat (82) respectively. The connecting seat (82) can be detached from the clamp tube (1). One end of the mandrel (81) is fixedly connected to the connecting shaft (4), the mandrel (81) passes through the roller (72) and is fixedly connected to the roller (72), while the other end of the mandrel (81) is fixedly connected to the push-pull block (71).

Images