A rotary locking mechanism

Abstract

The utility model discloses a kind of rotary locking mechanisms, including connecting rod, the connecting rod is rotatably connected with base, press button is slidably connected on the base, locking block is slidably connected on the connecting rod, internal elastic member is arranged between the locking block and connecting rod, the base is provided with the embedded portion that can be engaged with locking block, the internal elastic member can drive locking block to abut embedded portion, perforation is provided on the base, top shaft, which can pass through perforation and abut locking block, is provided on the press button, the press button can extrude locking block and move away from embedded portion. The utility model provides a kind of rotary locking mechanisms, can be unlocked quickly by press button, so as to the angle of quick adjustment of nosepiece can be carried out, improve the efficiency of adjustment.

Description

Technical Field

[0001] This utility model relates to the field of lawnmower technology, and in particular to a rotary locking mechanism. Background Technology

[0002] During the use of a lawnmower, the angle of the mowing head needs to be adjusted to modify the trimming angle. The angle of the mowing head also needs to be adjusted during the trimming process, which is different from the angle of conventional mowing. Therefore, most lawnmowers nowadays use an angle-adjustable head.

[0003] For example, announcement number "CN223261949U" discloses "an adjustable lawnmower head," which includes a handle, an adjustment component fixedly mounted at one end of the handle, a connecting plate at the end of the adjustment component away from the handle, a rotating disk rotatably mounted at the lower center of the connecting disk, multiple mowing blades fixedly mounted on the outer wall of the rotating disk, multiple arc grooves on the lower surface of the connecting disk, sliders slidably mounted within the arc grooves, a push rod fixedly mounted at the end of the slider away from the arc groove, and multiple transmission rods also mounted on the outer wall of the rotating disk, the transmission rods cooperating with the sliders and positioned above the mowing blades. However, in practical applications, this type of angle adjustment method is rather cumbersome. Utility Model Content

[0004] In view of the problem mentioned in the background art that the angle adjustment process of the prior art is cumbersome, this utility model provides a rotary locking mechanism that can be quickly unlocked by pressing a button, thereby enabling rapid angle adjustment of the machine head and improving the adjustment efficiency.

[0005] To achieve the above objectives, the present invention adopts the following technical solution.

[0006] A rotary locking mechanism includes a connecting rod rotatably connected to a base, a push button slidably connected to the base, a locking block slidably connected to the connecting rod, an internal elastic element between the locking block and the connecting rod, a fitting portion on the base capable of engaging the locking block, the internal elastic element capable of driving the locking block to abut against the fitting portion, a through hole on the base, and a top shaft on the push button capable of passing through the through hole and abutting against the locking block, the push button capable of pressing the locking block away from the fitting portion. During lawnmower use, different cutting angles are required. For example, during edge trimming, the mower head needs to be level, while during regular lawn mowing, different cutting angles are needed. Therefore, it is necessary to control the tilt adjustment of the mower head relative to the handle, while ensuring the relative stability between the mower head and the handle after adjustment. In existing technology, bolts and nuts are used for fastening. When the angle needs to be adjusted, the bolts and nuts are loosened and then the mower head is adjusted. After adjusting to the appropriate angle, the bolts and nuts are tightened. In the above process, the tightening and loosening of bolts and nuts requires rotation and is operated with the help of external tools. This process is cumbersome and time-consuming. Furthermore, due to the long operation time during adjustment, the mower head cannot be quickly constrained. This results in a certain deviation between the mower head and the pre-calibrated position after adjustment, leading to inaccurate adjustment angle.

[0007] To address the aforementioned issues, this application includes a locking block that slides relative to the connecting rod. An internal elastic element is positioned between the locking block and the connecting rod, allowing the locking block to move away from the connecting rod. The connecting rod is connected to a base, which in turn moves the locking block towards the base. A fitting portion is positioned on the base relative to the locking block, engaging with it to lock the connecting rod. In the locked state, the internal elastic element continuously applies pressure to the locking block, ensuring it remains engaged with the fitting portion and preventing relative rotation between the connecting rod and the base. Furthermore, while the locking block slides on the connecting rod, it cannot rotate relative to it, thus requiring control of the locking mechanism. The sliding connection between the block and the connecting rod is an unconventional cylindrical structure, thus achieving a circumferential rotation limiting effect. Furthermore, a push button is slidably connected to the base, and the push button is equipped with a top shaft. The top shaft abuts against the locking block through a perforation on the base. Therefore, when the push button slides relative to the base (i.e., the push button is pressed), the top shaft overcomes the elastic force of the internal elastic element and moves the locking block toward the connecting rod, causing the locking block to separate from the fitting part. The locking block loses its limiting constraint effect, and the connecting rod and the base can rotate relative to each other. After the machine head is adjusted to a suitable angle, the push button is released, and the locking block resets under the action of the internal elastic element and engages with the fitting part again. This can quickly lock the relative position of the base and the connecting rod, thereby ensuring the accuracy of the machine head adjustment.

[0008] Preferably, an external elastic element is provided between the press button and the base. The external elastic element between the press button and the base can push the press button to reset, so that the press button can achieve a self-resetting effect after being released, avoiding interference with the reset of the locking block.

[0009] Preferably, the push button includes a limiting shaft, and the base is provided with a limiting hole seat. The limiting shaft is slidably connected within the limiting hole seat, and a limiting stop is provided at the end of the limiting shaft. The limiting stop can abut against the end face of the limiting hole seat. The push button has a limiting shaft, and the base has a limiting hole seat. The limiting shaft is slidably connected within the limiting hole seat, and a limiting stop is connected at the end of the limiting shaft. The limiting stop can be a plate-like structure with a width greater than the limiting shaft, or it can form a limiting constraint effect through a connected wide-head screw. This ensures that the limiting stop abuts against the end face of the limiting hole seat during the movement of the limiting shaft, preventing the limiting shaft from dislodging from the limiting hole seat and ensuring that the push button always maintains a connection with the base.

[0010] Preferably, the connecting rod has a connecting hole, and the locking block includes a guide shaft slidably connected to the connecting hole. The connecting hole has a radial slot, and the guide shaft has limiting fins. The limiting fins are engaged with the radial slot and can slide relative to it. By providing a connecting hole with a radial slot in the connecting rod, and a guide shaft with limiting fins on the locking block, the limiting fins engage with the radial slot and can slide relative to it, thus fixing the circumferential relative position between the locking block and the connecting rod, preventing relative rotation between them.

[0011] Preferably, several limiting fins are provided, and each limiting fin is evenly distributed in a ring on the guide shaft. By providing several limiting fins and distributing them evenly in a ring on the guide shaft, the connection stability between the locking block and the connecting rod is improved, and the uniformity of force distribution is enhanced.

[0012] Preferably, the locking block includes a plurality of limiting teeth disposed towards the fitting portion, and the fitting portion includes a plurality of fitting grooves. When the locking block abuts against the fitting portion, the limiting teeth engage with the fitting grooves. The limiting teeth on the locking block and the fitting grooves on the fitting portion ensure the engagement between the locking block and the fitting portion through the engagement between the fitting grooves and the limiting teeth. Furthermore, having a plurality of both limiting teeth and fitting grooves improves the stability of the engagement connection.

[0013] Preferably, the base includes symmetrically arranged fitting parts and pressing buttons on both sides of the connecting rod. The connecting rod is symmetrically arranged with locking blocks that respectively engage with the fitting parts and pressing buttons on both sides. The two ends of the internal elastic element are respectively connected to the locking blocks on both sides. Two fitting parts and pressing buttons are symmetrically arranged on the base, with the fitting parts and pressing buttons respectively located on both sides of the connecting rod. Locking blocks are connected to both sides of the connecting rod, and an internal elastic element is arranged between the two locking blocks. By having the two ends of the internal elastic element abut against the locking blocks, the two locking blocks can contract and expand synchronously, ensuring uniform locking and limiting between the locking blocks and the fitting parts.

[0014] Preferably, the base is formed by two side plates, at least one of which has a connecting shaft. The connecting shaft passes through a locking block and an internal elastic element and connects to the opposite side plate or connecting shaft. The base is formed by combining two side plates, wherein a connecting shaft is provided on one or both side plates. The connecting shaft can pass through a locking block and an internal elastic element located at the center and connect to the other side plate. If both side plates have connecting shafts, the two connecting shafts are mated or sleeved, and then the two side plates are connected together by bolts or other connecting components.

[0015] Preferably, a damping elastic element is connected to the base, and a damping block is connected to the damping elastic element, with the damping block abutting against the connecting rod. The damping elastic element on the base, which drives the damping block to abut against the connecting rod, provides a damping effect on the relative rotation between the connecting rod and the base, thereby providing feedback for adjustments made by the operator.

[0016] Preferably, the connecting rod is provided with several arc-shaped connecting grooves, and the damping block has an arc-shaped protrusion on the side near the connecting rod, which can engage with each arc-shaped connecting groove. The connecting rod has several arc-shaped connecting grooves, and the damping block has an arc-shaped protrusion that can mate with the arc-shaped groove. Several arc-shaped connecting grooves are provided, and each groove is interconnected. This allows the arc-shaped protrusion to continuously switch engagement with the arc-shaped connecting groove during the relative rotation of the base and the connecting rod. Due to the arc shape of the protrusion and groove, the damping block can be driven by the damping elastic element to repeatedly cyclically move during the relative rotation of the base and the connecting rod, generating frequent vibrations and improving the feedback effect for the operator. Furthermore, the arc-shaped structure also improves the smoothness of the arc-shaped protrusion switching between the arc-shaped grooves.

[0017] The beneficial effects of this utility model are as follows: (1) It can improve the smoothness of the rotation lock adjustment, improve the adjustment efficiency, and ensure the relative stability between the base and the connecting rod; (2) Through the cooperation of internal and external elastic elements, a rapid self-resetting effect can be achieved, improving the convenience of operation; (3) Through the damping elastic element and damping block, an effective feedback effect can be formed during the adjustment process, thereby improving the perception effect during the adjustment process. Attached Figure Description

[0018] Figure 1 This is an exploded view of the present invention.

[0019] Figure 2 This is an isometric drawing of this utility model.

[0020] Figure 3 This is a partial isometric view of the connecting rod portion in this utility model.

[0021] Figure 4 This is a partial isometric view of the base portion of this utility model.

[0022] Figure 5 This is an exploded view of Example 2.

[0023] In the picture: 1. Base, 11. Press button, 111. Top shaft, 112. Limiting shaft, 12. Fitting part, 121. Fitting groove, 13. Through hole, 14. External elastic element, 15. Limiting hole seat, 16. Side plate, 161. Connecting shaft, 17. Mounting groove. 2 connecting rods, 21 locking block, 211 guide shaft, 212 limiting fin, 213 limiting tooth, 22 internal elastic element, 23 connecting hole, 231 radial slot; 31 Damping elastic element, 32 Damping block, 33 Arc connecting groove, 34 Arc protrusion. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0025] Example 1: like Figure 1 , 2 As shown, a rotary locking mechanism includes a connecting rod 2, a base 1 rotatably connected to the connecting rod 2, a push button 11 slidably connected to the base 1, a locking block 21 slidably connected to the connecting rod 2, an internal elastic element 22 provided between the locking block 21 and the connecting rod 2, a fitting part 12 provided on the base 1 that can engage and connect the locking block 21, the internal elastic element 22 can drive the locking block 21 to abut against the fitting part 12, a through hole 13 provided on the base 1, a top shaft 111 provided on the push button 11 that can pass through the through hole 13 and abut against the locking block 21, and the push button 11 can squeeze the locking block 21 away from the fitting part 12. During lawnmower use, different cutting angles are required. For example, during edge trimming, the mower head needs to be level, while during regular lawn mowing, different cutting angles are needed. Therefore, it is necessary to control the tilt adjustment of the mower head relative to the handle, while ensuring the relative stability between the mower head and the handle after adjustment. In existing technology, bolts and nuts are used for fastening. When the angle needs to be adjusted, the bolts and nuts are loosened and then the mower head is adjusted. After adjusting to the appropriate angle, the bolts and nuts are tightened. In the above process, the tightening and loosening of bolts and nuts requires rotation and is operated with the help of external tools. This process is cumbersome and time-consuming. Furthermore, due to the long operation time during adjustment, the mower head cannot be quickly constrained. This results in a certain deviation between the mower head and the pre-calibrated position after adjustment, leading to inaccurate adjustment angle.

[0026] To address the aforementioned issues, this application includes a locking block 21 that slides relative to the connecting rod 2. An internal elastic element 22 is provided between the locking block 21 and the connecting rod 2. This internal elastic element 22 drives the locking block 21 to move away from the connecting rod 2. The connecting rod 2 is connected to the base 1, thereby causing the locking block 21 to move towards the base 1. A fitting portion 12 is provided on the base 1 at a position relative to the locking block 21. The fitting portion 12 engages with the locking block 21, locking the connecting rod 2 through the locking block 21. In the locked state, the internal elastic element 22 continuously applies pressure to the locking block 21, ensuring that the locking block 21 remains engaged with the fitting portion 12, preventing relative rotation between the connecting rod 2 and the base 1. Furthermore, while the locking block 21 is slidably connected to the connecting rod 2 and can slide relative to it, it cannot rotate relative to it. Therefore, it is necessary to control the locking block 21. The sliding connection between the base 1 and the connecting rod 2 is an unconventional cylindrical structure, thereby achieving a circumferential rotation limiting effect. Furthermore, a push button 11 is slidably connected to the base 1, wherein the push button 11 is provided with a top shaft 111. The top shaft 111 abuts against the locking block 21 through the through hole 13 on the base 1. Therefore, when the push button 11 slides relative to the base 1 (i.e., the push button 11 is pressed), the top shaft 111 will overcome the elastic force of the internal elastic element 22 and move the locking block 21 toward the connecting rod 2, so that the locking block 21 separates from the fitting part 12, and the locking block 21 loses its limiting constraint effect. The connecting rod 2 and the base 1 can rotate relative to each other. After the machine head is adjusted to a suitable angle, the push button 11 is released, and the locking block 21 is reset under the drive of the internal elastic element 22 and engages with the fitting part 12 again. This can quickly lock the relative position of the base 1 and the connecting rod 2, thereby ensuring the accuracy of the machine head adjustment.

[0027] like Figure 1 As shown, an external elastic element 14 is provided between the press button 11 and the base 1. The external elastic element 14 provided between the press button 11 and the base 1 can push the press button 11 to reset, so that the press button 11 can achieve a self-resetting effect after being released, avoiding interference with the reset of the locking block 21.

[0028] like Figure 1 , 4As shown, the push button 11 includes a limiting shaft 112 and a limiting hole seat 15 on the base 1. The limiting shaft 112 is slidably connected within the limiting hole seat 15, and a limiting stop is provided at the end of the limiting shaft 112. The limiting stop can abut against the end face of the limiting hole seat 15. The push button 11 has a limiting shaft 112, and the base 1 has a limiting hole seat 15. The limiting shaft 112 is slidably connected within the limiting hole seat 15, and a limiting stop is connected at the end of the limiting shaft 112. The limiting stop can be a plate-like structure with a width greater than the limiting shaft 112, or it can be formed by connecting a wide-head screw to create a limiting constraint effect. This allows the limiting stop to abut against the end face of the limiting hole seat 15 during the movement of the limiting shaft 112, preventing the limiting shaft 112 from dislodging from the limiting hole seat 15, and ensuring that the push button 11 always maintains a connection with the base 1. In this embodiment, a wide-head screw is connected to the end of the limiting shaft 112 for limiting. The nut diameter of the wide-head screw is larger than the diameter of the limiting shaft 112 (the wide-head screw is not shown in the figure).

[0029] like Figure 1 , 3 As shown, a connecting hole 23 is provided in the connecting rod 2. The locking block 21 includes a guide shaft 211 that is slidably connected to the connecting hole 23. A radial slot 231 is provided in the connecting hole 23. A limiting fin 212 is provided on the guide shaft 211. The limiting fin 212 is engaged with the radial slot 231 and can slide relative to it. The connecting hole 23 is provided in the connecting rod 2, and a radial slot 231 is provided in the connecting hole 23. Correspondingly, a guide shaft 211 is provided on the locking block 21, and a limiting fin 212 is provided on the guide shaft 211. The limiting fin 212 is engaged with the radial slot 231, and the limiting fin 212 can slide relative to the radial slot 231, thereby fixing the circumferential relative position between the locking block 21 and the connecting rod 2, preventing relative rotation between them.

[0030] like Figure 3 As shown, several limiting fins 212 are provided, and each limiting fin 212 is evenly distributed in a ring on the guide shaft 211. By providing several limiting fins 212 and distributing them evenly in a ring on the guide shaft 211, the connection stability between the locking block 21 and the connecting rod 2 is improved, and the uniformity of force distribution is enhanced.

[0031] like Figure 3 , 4As shown, the locking block 21 includes a plurality of limiting teeth 213 disposed on one side of the fitting portion 12, and the fitting portion 12 includes a plurality of fitting grooves 121. When the locking block 21 abuts against the fitting portion 12, the limiting teeth 213 engage with the fitting grooves 121. The limiting teeth 213 are provided on the locking block 21, and the fitting grooves 121 are provided on the fitting portion 12. The engaging connection between the fitting grooves 121 and the limiting teeth 213 ensures the engaging connection between the locking block 21 and the fitting portion 12. Furthermore, by providing a plurality of limiting teeth 213 and fitting grooves 121, the stability of the engaging connection can be improved.

[0032] like Figure 1 As shown, the base 1 includes fitting parts 12 and pressing buttons 11 symmetrically arranged on both sides of the connecting rod 2. Locking blocks 21 are symmetrically arranged on the connecting rod 2, respectively engaging with the fitting parts 12 and pressing buttons 11 on both sides. The two ends of an internal elastic element 22 are connected to the locking blocks 21 on both sides. Two fitting parts 12 and pressing buttons 11 are symmetrically arranged on the base 1, with the fitting parts 12 and pressing buttons 11 respectively located on both sides of the connecting rod 2. Locking blocks 21 are connected to both sides of the connecting rod 2, and an internal elastic element 22 is arranged between the two locking blocks 21. By having the two ends of the internal elastic element 22 abut against the locking blocks 21, the two locking blocks 21 can contract and expand synchronously, ensuring the uniformity of the locking limit between the locking blocks 21 and the fitting parts 12.

[0033] like Figure 1 As shown, the base 1 is formed by two side plates 16. At least one side plate 16 is provided with a connecting shaft 161. The connecting shaft 161 passes through the locking block 21 and the internal elastic element 22 and connects to the opposite side plate 16 or the connecting shaft 161. The base 1 is formed by combining two side plates 16. The connecting shaft 161 is provided on one or both side plates 16. The connecting shaft 161 can pass through the locking block 21 and the internal elastic element 22 provided at the center and connect to the other side plate 16. If both side plates 16 are provided with connecting shafts 161, the two connecting shafts 161 are mated or sleeved, and then the two side plates 16 are connected together by bolts or other connecting components.

[0034] Example 2: like Figure 5 As shown, a damping elastic element 31 is connected to the base 1, and a damping block 32 is connected to the damping elastic element 31. The damping block 32 abuts against the connecting rod 2. The damping elastic element 31 on the base 1 drives the damping block 32 to abut against the connecting rod 2, thereby providing a damping effect on the relative rotation between the connecting rod 2 and the base 1, and thus providing feedback for the operator's adjustments. In this embodiment, a mounting groove 17 is provided on the base 1, through which the damping elastic element 31 and the damping block 32 are mounted.

[0035] like Figure 5 As shown, the connecting rod 2 is provided with several arc-shaped connecting grooves 33, and the damping block 32 has an arc-shaped protrusion 34 on the side near the connecting rod 2. The arc-shaped protrusion 34 can engage with each of the arc-shaped connecting grooves 33. The connecting rod 2 is provided with several arc-shaped connecting grooves 33, and the damping block 32 is provided with an arc-shaped protrusion 34. The arc-shaped protrusion 34 can mate with the arc-shaped groove. There are several arc-shaped connecting grooves 33, and each arc-shaped connecting groove 33 is interconnected. During the relative rotation of the base 1 and the connecting rod 2, the arc-shaped protrusion 34 can continuously switch and engage with the arc-shaped connecting groove 33. Due to the arc-shaped design of the arc-shaped protrusion 34 and the arc-shaped connecting groove 33, during the relative rotation of the base 1 and the connecting rod 2, the damping elastic element 31 can drive the damping block 32 to repeatedly cycle, generating a frequent vibration effect, improving the feedback effect for the operator, and the arc-shaped structure can also improve the smoothness of the arc-shaped protrusion 34 switching between the arc-shaped connecting grooves 33.

[0036] In addition to the structural features described above, this embodiment also includes a connecting rod 2, which is rotatably connected to a base 1. A pressing button 11 is slidably connected to the base 1. A locking block 21 is slidably connected to the connecting rod 2. An internal elastic element 22 is provided between the locking block 21 and the connecting rod 2. The base 1 is provided with a fitting part 12 that can engage with the locking block 21. The internal elastic element 22 can drive the locking block 21 to abut against the fitting part 12. The base 1 is provided with a through hole 13. The pressing button 11 is provided with a top shaft 111 that can pass through the through hole 13 and abut against the locking block 21. The pressing button 11 can squeeze the locking block 21 away from the fitting part 12. An external elastic element 14 is provided between the pressing button 11 and the base 1. The push button 11 includes a limiting shaft 112, and a limiting hole seat 15 is provided on the base 1. The limiting shaft 112 is slidably connected in the limiting hole seat 15, and a limiting stop is provided at the end of the limiting shaft 112, which can abut against the end face of the limiting hole seat 15. The connecting rod 2 is provided with a connecting hole 23, and the locking block 21 includes a guide shaft 211 slidably connected to the connecting hole 23. A radial slot 231 is provided in the connecting hole 23, and a limiting fin 212 is provided on the guide shaft 211. The limiting fin 212 is engaged with the radial slot and can slide relative to it. Several limiting fins 212 are provided, and each limiting fin 212 is evenly distributed in a ring on the guide shaft 211. The locking block 21 includes a plurality of limiting teeth 213 disposed on one side of the fitting portion 12. The fitting portion 12 includes a plurality of fitting grooves 121. When the locking block 21 abuts against the fitting portion 12, the limiting teeth 213 engage with the fitting grooves 121. The base 1 includes fitting portions 12 and pressing buttons 11 symmetrically disposed on both sides of the connecting rod 2. The connecting rod 2 is symmetrically disposed with locking blocks 21 that respectively engage with the fitting portions 12 and pressing buttons 11 on both sides. The two ends of the internal elastic element 22 are respectively connected to the locking blocks 21 on both sides. The base 1 is formed by two side plates 16. At least one side plate 16 is provided with a connecting shaft 161. The connecting shaft 161 passes through the locking block 21 and the internal elastic element 22 and connects to the opposite side plate 16 or the connecting shaft 161.

[0037] In addition to the above embodiments, within the scope disclosed in the claims and description of this utility model, the technical features of this utility model can be reselected and combined to form new embodiments. These can be achieved by those skilled in the art without creative effort. Therefore, these embodiments not described in detail in this utility model should also be regarded as specific embodiments of this utility model and within the protection scope of this utility model.

Claims

1. A rotary locking mechanism, characterized in that, The device includes a connecting rod, which is rotatably connected to a base. A push button is slidably connected to the base. A locking block is slidably connected to the connecting rod. An internal elastic element is provided between the locking block and the connecting rod. The base has a fitting part that can engage with the locking block. The internal elastic element can drive the locking block to abut against the fitting part. The base has a through hole. The push button has a top shaft that can pass through the through hole and abut against the locking block. The push button can squeeze the locking block away from the fitting part.

2. The rotary locking mechanism according to claim 1, characterized in that, An external elastic element is provided between the press button and the base.

3. The rotary locking mechanism according to claim 1, characterized in that, The push button includes a limiting shaft, and a limiting hole seat is provided on the base. The limiting shaft is slidably connected in the limiting hole seat, and a limiting stop is provided at the end of the limiting shaft. The limiting stop can abut against the end face of the limiting hole seat.

4. A rotary locking mechanism according to claim 1, characterized in that, The connecting rod has a connecting hole, and the locking block includes a guide shaft that is slidably connected to the connecting hole. The connecting hole has a radial slot, and the guide shaft has a limiting fin. The limiting fin is engaged with the radial slot and can slide relative to it.

5. A rotary locking mechanism according to claim 4, characterized in that, The limiting fins are provided in a plurality of manner, and each limiting fin is evenly distributed in a ring on the guide shaft.

6. A rotary locking mechanism according to claim 1, characterized in that, The locking block includes a plurality of limiting teeth disposed on one side of the fitting portion, and the fitting portion includes a plurality of fitting grooves. When the locking block abuts against the fitting portion, the limiting teeth engage with the fitting grooves.

7. A rotary locking mechanism according to claim 1, characterized in that, The base includes fitting parts and pressing buttons symmetrically arranged on both sides of the connecting rod. Locking blocks are symmetrically arranged on the connecting rod to engage with the fitting parts and pressing buttons on both sides respectively. The two ends of the internal elastic element are respectively connected to the locking blocks on both sides.

8. A rotary locking mechanism according to claim 1, characterized in that, The base is formed by two side plates, and at least one of the side plates is provided with a connecting shaft. The connecting shaft passes through the locking block and the internal elastic element and is connected to the opposite side plate or connecting shaft.

9. A rotary locking mechanism according to any one of claims 1-8, characterized in that, A damping elastic element is connected to the base, and a damping block is connected to the damping elastic element. The damping block abuts against the connecting rod.

10. A rotary locking mechanism according to claim 9, characterized in that, The connecting rod is provided with several arc-shaped connecting grooves, and the damping block has an arc-shaped protrusion on the side near the connecting rod. The arc-shaped protrusion can engage with each arc-shaped connecting groove.

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