Looseness-free fastening structure

Abstract

The utility model relates to the technical field of mechanical connection, and provides an anti-loosening fastening structure which comprises a connecting rod, a rotary cover and an elastic piece, one end of the connecting rod is provided with an installation portion, the other end of the connecting rod is provided with a connector, the connector is provided with a plurality of sliding grooves distributed in the circumferential direction, and the ends, close to the installation portion, of the sliding grooves penetrate through the connector. The ends, away from the mounting part, of the sliding grooves are closed, and a stop groove is formed between every two adjacent sliding grooves. The rotary cover is provided with a mounting hole used for being connected with the connector in a sleeved mode, a sliding block is arranged on the inner wall of the mounting hole, and the sliding block can slide along the sliding groove and can be embedded in the stop groove; the elastic piece is installed on the connecting rod, abuts against the rotating cover and is used for applying elastic force away from the installation part to the rotating cover. The rotating cover is pressed, so that the sliding block slides along the sliding groove and is separated from the sliding groove to enter the stopping groove, the distance between the rotating cover and the mounting part is shortened, the protruding size of the rotating cover is further shortened, the captive fastening structure is in a contraction state, and the occupied external space is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical connection, in particular to a non-loose fastening structure. Background Art

[0002] Captive screws, also known as captive screws, spring screws, and captive screws, are threaded connections, press rivets, or expansion rivets to the parts to be connected. They are mostly used in display screens, power technology, switches, chassis cabinets, and other industry fields.

[0003] Combination Figure 1 The existing non-loose fastening structure includes a screw 20 and a spring 30. One end of the screw 20 is threadedly connected to the component to be connected, and the other end of the screw 20 has a head 21. One end of the spring 30 abuts against the component to be connected, and the other end of the spring 30 abuts against the head 21 of the screw 20. After the non-loose fastening structure is installed, since the length of the screw 20 is fixed, when the screw 20 is locked, the end of the screw 20 close to the head 21 will obviously protrude from the outside of the component to be connected, resulting in a large space occupation. For example, when the screw 20 is installed on a transparent display screen, the size of the screw 20 protruding from the display screen is too large, the display screen device is not simple, and the transparency of the display screen when viewed from the side and the assembly of other components are affected.

[0004] Therefore, the existing non-loose fastening structure has the technical problem of occupying a large space after installation. Utility Model Content

[0005] The utility model aims to provide a non-detachable fastening structure, aiming to solve the technical problem that the existing non-detachable fastening structure occupies a large space after installation.

[0006] The present application provides a non-loose fastening structure, the non-loose fastening structure comprising:

[0007] A connecting rod, one end of which has a mounting portion, and the other end of which is provided with a connecting head, wherein the connecting head has a plurality of circumferentially distributed sliding grooves, an end of the sliding groove close to the mounting portion passes through the connecting head, an end of the sliding groove away from the mounting portion is closed, and a stop groove is provided between two adjacent sliding grooves;

[0008] A rotating cover, wherein the rotating cover has a mounting hole for sleeve-connecting the connector, and a slider is disposed on the inner wall of the mounting hole, and the slider can slide along the slide groove and can be embedded in the stop groove;

[0009] An elastic member is installed on the connecting rod, the elastic member abuts against the rotating cover, and the elastic member is used to apply an elastic force to the rotating cover away from the mounting portion.

[0010] In one embodiment, the stop groove includes a first guide surface, which is inclined along a first rotation direction toward a direction away from the mounting portion to guide the sliding block that has detached from the previous sliding groove to slide into the stop groove along the first rotation direction.

[0011] In one of the embodiments, the first guide surface is spliced ​​with the groove wall of the previous sliding groove.

[0012] In one embodiment, the stop groove includes a first stop surface, the first stop surface is spliced ​​with the first guide surface, and the angle formed between the first stop surface and the first guide surface is less than or equal to 90°.

[0013] In one embodiment, the connecting head is provided with a second guide surface, and the second guide surface is located between the stop groove and the next slide groove, and the second guide surface is inclined along the first rotation direction in a direction away from the mounting portion to guide the sliding block that has detached from the previous stop groove to slide into the next slide groove along the first rotation direction.

[0014] In one embodiment, the number of the sliding blocks is the same as the number of the sliding grooves and corresponds one to one.

[0015] In one embodiment, a third guide surface is provided at the end of the slider away from the mounting portion, and the third guide surface is inclined along the first rotation direction toward a direction away from the mounting portion to guide the slider to slide into the next stop groove or the slide groove in sequence along the first rotation direction.

[0016] In one of the embodiments, the non-loose fastening structure also includes a guide fixing block, which is fixedly installed on the connecting rod. The guide fixing block is located on the side of the connecting head close to the mounting portion, and the guide fixing block, the groove wall of the sliding groove and the groove wall of the stop groove define the movable space of the slider.

[0017] In one of the embodiments, a plurality of guide portions are provided at one end of the guide fixing block facing the connecting head, the guide portions are distributed at intervals along the circumference of the connecting rod, and the guide portions are used to guide the sliding block to rotate along the first rotation direction.

[0018] In one embodiment, the guide portion includes a fourth guide surface and a fifth guide surface arranged in sequence along the first rotation direction, the fourth guide surface is inclined along the first rotation direction toward the connecting head, and the fifth guide surface is inclined along the first rotation direction toward the mounting portion.

[0019] In one embodiment, a sixth guide surface is provided at the end of the slider close to the mounting portion, and the sixth guide surface is inclined along the first rotation direction toward the direction close to the mounting portion to guide the slider to slide through the guide portion along the first rotation direction.

[0020] In one of the embodiments, one of the guide fixing block and the connector has a connecting hole, and the other of the guide fixing block and the connector has a mounting block, and the mounting block is interference fit with the connecting hole.

[0021] In one embodiment, the elastic member is sleeved on the connecting rod, the elastic member is located on a side of the rotating cover close to the mounting portion, and the elastic member abuts against the rotating cover.

[0022] In one embodiment, the mounting portion is a threaded portion or a riveted portion.

[0023] The beneficial effects of the non-detachable fastening structure provided by the utility model are as follows: the connecting rod is fixedly installed on the part to be connected through the installation part, and the rotating cover is pressed to make the sliding block slide along the sliding groove and disengage from the sliding groove and enter the stop groove, thereby shortening the distance between the rotating cover and the installation part, and then shortening the protruding size of the rotating cover, so that the non-detachable fastening structure is in a contracted state, reducing the external space occupied, and solving the technical problem that the existing non-detachable fastening structure has a large space occupied after installation, thereby reducing the risk of interference between the non-detachable fastening structure and the external structure, and reducing the risk of collision between the non-detachable fastening structure and people and objects. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0025] Figure 1 A schematic diagram of a non-loose fastening structure in the background art;

[0026] Figure 2 An exploded view of a non-loose fastening structure provided in an embodiment of the utility model;

[0027] Figure 3 A diagram showing the initial state of the non-loose fastening structure provided by the embodiment of the utility model when in use;

[0028] Figure 4 A diagram showing a compressed state of the non-loose fastening structure provided by an embodiment of the utility model when in use;

[0029] Figure 5 A schematic diagram of a compression state of a non-loose fastening structure provided by an embodiment of the utility model;

[0030] Figure 6 for Figure 5 Another perspective of the picture;

[0031] Figure 7 for Figure 6 A cross-sectional view of

[0032] Figure 8 A schematic diagram of the initial state of the non-loose fastening structure provided by an embodiment of the utility model;

[0033] Fig. 9 for Figure 8 Another perspective of the picture;

[0034] Fig.10 for Fig. 9 A cross-sectional view of

[0035] Fig.11 A schematic diagram of the structure of a rotating cover with a non-detachable fastening structure provided by an embodiment of the utility model;

[0036] Fig.12 A structural schematic diagram of a guide fixing block of a non-loose fastening structure provided in an embodiment of the utility model;

[0037] Fig.13 A schematic diagram from another perspective of the guide fixing block of the non-loose fastening structure provided in an embodiment of the utility model.

[0038] Among them, the reference numerals in the figure are:

[0039] O, first rotation direction;

[0040] 10. Parts to be connected;

[0041] 20. Screw; 21. Head;

[0042] 30. Spring;

[0043] 100, connecting rod; 110, mounting portion; 120, connecting head; 121, sliding groove; 122, stop groove; 123, first guide surface; 124, first stop surface; 125, second guide surface;

[0044] 200, rotating cover; 201, mounting hole; 210, slider; 211, third guide surface; 212, sixth guide surface;

[0045] 300, elastic member;

[0046] 400, guide fixing block; 410, guide portion; 411, fourth guide surface; 412, fifth guide surface; 420, connecting hole. DETAILED DESCRIPTION

[0047] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0048] Reference throughout the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, when the phrases "in one embodiment" or "in some embodiments" appear in various places throughout the specification, not all references are to the same embodiment. Furthermore, in one or more embodiments, the particular features, structures, or characteristics may be combined in any suitable manner.

[0049] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0050] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0051] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] Please combine Figure 1, the present application provides a non-loose fastening structure. The non-loose fastening structure includes a connecting rod 100, a rotating cover 200 and an elastic member 300. One end of the connecting rod 100 has a mounting portion 110, and the other end of the connecting rod 100 is provided with a connecting head 120, and the connecting head 120 has a plurality of circumferentially distributed sliding grooves 121, and the end of the sliding groove 121 close to the mounting portion 110 passes through the connecting head 120, and the end of the sliding groove 121 away from the mounting portion 110 is closed, and a stop groove 122 is provided between two adjacent sliding grooves 121. The rotating cover 200 has a mounting hole 201 for sleeve-connecting the connecting head 120, and the inner wall of the mounting hole 201 is provided with a slider 210, and the slider 210 can slide along the sliding groove 121 and can be embedded in the stop groove 122. The elastic member 300 is mounted on the connecting rod 100 . The elastic member 300 abuts against the rotating cover 200 . The elastic member 300 is used to apply an elastic force to the rotating cover 200 away from the mounting portion 110 .

[0053] Among them, combined Figure 3 The connecting rod 100 is fixedly mounted on the component to be connected 10 through the mounting portion 110, and the rotating cover 200 protrudes from the component to be connected 10 to a large extent. By pressing the rotating cover 200, the slider 210 slides along the slide groove 121 and disengages from the slide groove 121 and enters the stop groove 122, shortening the distance between the rotating cover 200 and the mounting portion 110, thereby shortening the protrusion of the rotating cover 200, so that the loose fastening structure is in a contracted state (see Figure 4 ), reducing the external space occupied, solving the technical problem that the existing non-loose fastening structure occupies a large space after installation, thereby reducing the risk of interference between the non-loose fastening structure and the external structure, and reducing the risk of collision between the non-loose fastening structure and people and objects.

[0054] Specifically, in the initial state, combined Figure 3 The rotating cover 200 protrudes from the component to be connected 10, which is convenient for the user to operate the rotating cover 200 and then operate the non-loose fastening structure. When the non-loose fastening structure is assembled, the rotating cover 200 is exposed to a larger extent outside the component to be connected 10. At this time, the rotating cover 200 is connected to the component to be connected. Figures 5 to 7 , the user can choose to press the rotating cover 200, so that the slider 210 slides along the slide groove 121 and is limited in the stop groove 122, reducing the protruding size of the rotating cover 200. When the rotating cover 200 needs to be operated again, combined with Figures 8 to 10 The user presses the slider 210 to slide out of the stop groove 122 and into the slide groove 121 , and slides along the slide groove 121 to the end of the slide groove 121 away from the stop groove 122 , so that the user can operate the rotating cover 200 .

[0055] In some embodiments, in combination Figure 2 , Figure 8 and Fig. 9The stop groove 122 includes a first guide surface 123, which is inclined along the first rotation direction O in a direction away from the mounting portion 110 to guide the slider 210 that has been separated from the previous slide groove 121 to slide into the stop groove 122 along the first rotation direction O. Based on this, the first guide surface 123 is inclined along the first rotation direction O in a direction away from the mounting portion 110, that is, when the slider 210 is separated from the slide groove 121, it can naturally slide into the stop groove 122 along the first guide surface 123, and the rotating cover 200 rotates along the first rotation direction O without the need for additional operations or precise alignment, so that the non-loose fastener is switched from the initial state to the compressed state, thereby improving the efficiency and success rate of the slider 210 entering the stop groove 122. Due to the existence of the first guide surface 123, the user does not need to deliberately control the direction or force of the slider 210. The user only needs to simply press the rotating cover 200, and the slider 210 can automatically move to the first guide surface 123 and enter the stop groove 122, and the rotating cover 200 rotates along the first rotation direction O, which greatly reduces the difficulty of operation.

[0056] In addition, since the slider 210 can smoothly enter the next stop groove 122, the risk of the slider 210 being stuck or damaged due to improper operation is reduced, thereby improving the reliability and stability of the entire non-loose fastening structure.

[0057] In one embodiment, in combination Figure 2 , Figure 8 and Fig. 9 The first guide surface 123 is spliced ​​with the groove wall of the previous slide groove 121, so that the transition between the slide groove 121 and the stop groove 122 is more direct. When the slider 210 slides out of the slide groove 121 and can directly enter the stop groove 122 along the first guide surface 123, the slider 210 can maintain a stable motion trajectory, reducing the jitter or deviation caused by the change of direction.

[0058] In some embodiments, in combination Figure 2 , Figure 8 and Fig. 9 The stop groove 122 includes a first stop surface 124, which is spliced ​​with the first guide surface 123, and the angle formed between the first stop surface 124 and the first guide surface 123 is less than or equal to 90°. When the slider 210 slides into the stop groove 122 along the first guide surface 123, it can be stably parked on the first stop surface 124, thereby improving the position stability of the slider 210 in the stop groove 122, and the rotating cover 200 is kept in a compressed state, reducing the risk of the slider 210 being offset or sliding out of the stop groove 122 due to external factors (such as vibration).

[0059] In some embodiments, in combination Figure 2 , Figure 8 and Fig. 9The connector 120 is provided with a second guide surface 125, which is located between the stop groove 122 and the next slide groove 121. The second guide surface 125 is inclined along the first rotation direction O in a direction away from the mounting portion 110 to guide the slider 210 that has escaped from the previous stop groove 122 to slide into the next slide groove 121 along the first rotation direction O. When the rotating cover 200 is in a compressed state, the user presses the rotating cover 200, and the slider 210 slides out of the stop groove 122 along the pressing direction. The second guide surface 125 can provide a smooth transition path, guiding the slider 210 to slide into the next slide groove 121 along the first rotation direction O, thereby reducing the resistance that the slider 210 may encounter during the sliding process. When the slider 210 slides out of the stop groove 122, the second guide surface 125 can ensure that the slider 210 can accurately enter the next slide groove 121, and the movement of the slider 210 and the rotating cover 200 is more stable and reliable, reducing the risk of the slider 210 being stuck or damaged due to improper operation.

[0060] In some embodiments, in combination Figure 2 , the number of the sliders 210 is the same as the number of the slide grooves 121, and they correspond one to one. Since a stop groove 122 is provided between two adjacent slide grooves 121, the number of the multiple sliders 210 is also the same as the number of the multiple stop grooves 122. Based on this, in the initial state, the multiple sliders 210 are respectively located in the corresponding slide grooves 121, and in the compressed state, the multiple sliders 210 are respectively located in the corresponding stop grooves 122, which improves the stability and reliability of the non-loose fastening structure.

[0061] In some embodiments, in combination Figure 2 , Fig.11 The end of the slider 210 away from the mounting portion 110 is provided with a third guide surface 211, and the third guide surface 211 is inclined along the first rotation direction O toward the direction away from the mounting portion 110, so as to guide the slider 210 to slide into the next stop groove 122 or slide groove 121 in sequence along the first rotation direction O. The design of the third guide surface 211 allows the slider 210 to slide into the next stop groove 122 or slide groove 121 when sliding out of a stop groove 122 or slide groove 121, thereby avoiding the possible jamming or jumping of the slider 210 during the sliding process, and reducing the risk of the slider 210 deviating from the predetermined path due to improper operation or external force interference. Due to the existence of the third guide surface 211, the sliding resistance of the slider 210 when switching between the slide groove 121 and the stop groove 122 is reduced, thereby improving the sliding efficiency.

[0062] In some embodiments, in combination Figure 2 , Fig.12 and Fig.13The non-loose fastening structure also includes a guide fixing block 400, which is fixedly mounted on the connecting rod 100. The guide fixing block 400 is located on the side of the connector 120 close to the mounting portion 110. The guide fixing block 400, the groove wall of the slide groove 121, and the groove wall of the stop groove 122 define the movable space of the slider 210. The guide fixing block 400 ensures the maximum travel of the slider 210 after it slides away from the slide groove 121 or the stop groove 122 along the rod length direction of the connecting rod 100, avoids the slider 210 from sliding infinitely, causing the motion path to be prone to errors, and avoids unnecessary displacement or offset. The existence of the guide fixing block 400 makes the entire structure more stable and reduces the risk of the slider 210 being displaced or falling off due to external force or vibration.

[0063] In one embodiment, in combination Figure 2 , Fig.12 and Fig.13 , a plurality of guide portions 410 are provided at one end of the guide fixing block 400 facing the connector 120, and the guide portions 410 are spaced apart along the circumference of the connecting rod 100, and the guide portions 410 are used to guide the slider 210 to rotate along the first rotation direction O. The guide portion 410 guides the slider 210 and the rotating cover 200 to rotate along the first rotation direction O, and smoothly enter the slide groove 121 or the stop groove 122 in sequence, so as to facilitate continuous switching between the initial state and the compressed state, and avoid the slider 210 from deviating from the predetermined path due to external force or improper operation. By providing a plurality of guide portions 410, the fit between the slider 210 and the guide fixing block 400 is tighter. This tight fit can reduce the shaking or jitter of the slider 210 during the rotation process, and further improve the stability and reliability of the movement of the slider 210.

[0064] In one embodiment, the guide portion 410 includes a fourth guide surface 411 and a fifth guide surface 412 sequentially arranged along the first rotation direction O, the fourth guide surface 411 is inclined in the direction close to the connector 120 along the first rotation direction O, and the fifth guide surface 412 is inclined in the direction close to the mounting portion 110 along the first rotation direction O. The fourth guide surface 411 is inclined in the direction close to the connector 120 along the first rotation direction O, so that when the slider 210 starts to rotate from the initial state, it can be pushed forward, and the assisting slider 210 can more easily start to move along the first rotation direction O and enter the next stop groove 122. The fifth guide surface 412 is inclined in the direction close to the mounting portion 110 along the first rotation direction O, so that when the rotating cover 200 is pressed again, the assisting slider 210 can more easily start to move along the first rotation direction O and enter the next slide groove 121, providing a smooth transition for the slider 210. The fourth guide surface 411 and the fifth guide surface 412 together ensure that the slider 210 can continuously and stably rotate along a predetermined path, thereby reducing the position deviation of the slider 210 during the rotation process and improving the positioning accuracy.

[0065] In addition, the fourth guide surface 411 and the fifth guide surface 412 of the guide portion 410 increase the contact area between the slider 210 and the guide fixing block 400, thereby improving the stability and reliability of the guide fixing block 400 to the slider 210 and reducing the risk of position displacement or falling off of the slider 210 due to external force or vibration.

[0066] In one embodiment, a sixth guide surface 212 is provided at the end of the slider 210 close to the mounting portion 110, and the sixth guide surface 212 is inclined along the first rotation direction O toward the direction close to the mounting portion 110 to guide the slider 210 to slide through the guide portion 410 along the first rotation direction O. The inclined design of the sixth guide surface 212 ensures that the slider 210 rotates along the first rotation direction O when passing through the guide portion 410, and ensures that the slider 210 can smoothly enter or leave the guide portion 410, thereby avoiding the slider 210 from getting stuck or jumping off during the sliding process. The sixth guide surface 212 reduces the resistance of the slider 210 passing through the guide fixing block 400.

[0067] In one embodiment, one of the guide fixing block 400 and the connector 120 has a connection hole 420, and the other of the guide fixing block 400 and the connector 120 has a mounting block, and the mounting block is interference-fitted with the connection hole 420 to achieve a fixed connection. Based on this, the guide fixing block 400 and the connector 120 are fixedly connected, and no additional fasteners or connectors are required. The connection can be achieved only through the elastic deformation of the material itself, and the connection between the two can transmit a large torque and axial force, and is not easy to loosen or fall off when impacted, and has high connection stability and high connection reliability.

[0068] In one embodiment, in combination Figure 2 , the elastic member 300 is sleeved on the connecting rod 100, the elastic member 300 is located on the side of the rotating cover 200 close to the mounting portion 110, and the elastic member 300 is against the rotating cover 200. The elastic member 300 can provide elastic force to the rotating cover 200 to prevent the rotating cover 200 from being separated from the connector 120, so that the slider 210 is stably located in the slide groove 121 or the stop groove 122. At the same time, the elastic member 300, as a buffer element between the connecting rod 100 and the rotating cover 200, can effectively absorb and disperse external shocks or vibrations, and reduce damage or destruction to the rotating cover 200 and the connecting rod 100. The elastic member 300 can compensate for the slight displacement caused by factors such as temperature changes and structural deformation to a certain extent, and maintain a stable connection between the rotating cover 200 and the connector 120.

[0069] Optionally, the elastic member 300 is a rubber pad or a spring, which is not limited here.

[0070] In one embodiment, in combination Figures 2 to 4, the mounting portion 110 is a threaded portion or a riveted portion. When the mounting portion 110 is a threaded portion, the connecting rod 100 and the component to be connected 10 are easy to disassemble. When the mounting portion 110 is a riveted portion, the connection between the connecting rod 100 and the component to be connected 10 is firm, the bearing capacity is stronger, and stability can be maintained in a high temperature environment.

[0071] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A non-loose fastening structure, characterized in that: The non-loose fastening structure comprises: A connecting rod, one end of which has a mounting portion, and the other end of which is provided with a connecting head, wherein the connecting head has a plurality of circumferentially distributed sliding grooves, an end of the sliding groove close to the mounting portion passes through the connecting head, an end of the sliding groove away from the mounting portion is closed, and a stop groove is provided between two adjacent sliding grooves; A rotating cover, wherein the rotating cover has a mounting hole for sleeve-connecting the connector, and a slider is disposed on the inner wall of the mounting hole, and the slider can slide along the slide groove and can be embedded in the stop groove; An elastic member is installed on the connecting rod, the elastic member abuts against the rotating cover, and the elastic member is used to apply an elastic force to the rotating cover away from the mounting portion.

2. The non-loose fastening structure according to claim 1, characterized in that: The stop groove comprises a first guide surface, and the first guide surface is inclined in a direction away from the mounting portion along a first rotation direction to guide the sliding block separated from the last sliding groove to slide into the stop groove along the first rotation direction.

3. The non-loose fastening structure according to claim 2, characterized in that: The first guide surface is spliced ​​with the groove wall of the previous sliding groove; And / or, the stop groove includes a first stop surface, the first stop surface is spliced ​​with the first guide surface, and the angle formed between the first stop surface and the first guide surface is less than or equal to 90°.

4. The non-loose fastening structure according to claim 1, characterized in that: The connecting head is provided with a second guide surface, and the second guide surface is located between the stop groove and the next slide groove. The second guide surface is inclined along the first rotation direction toward the direction away from the mounting portion to guide the sliding block that has detached from the previous stop groove to slide into the next slide groove along the first rotation direction.

5. The non-loose fastening structure according to claim 1, characterized in that: The number of the sliders is the same as the number of the slide slots and corresponds one to one; And / or, a third guide surface is provided at the end of the slider away from the mounting portion, and the third guide surface is inclined along the first rotation direction in a direction away from the mounting portion to guide the slider to slide into the next stop groove or the slide groove in sequence along the first rotation direction.

6. The non-loose fastening structure according to claim 1, characterized in that: The non-loose fastening structure also includes a guide fixing block, which is fixedly installed on the connecting rod. The guide fixing block is located on the side of the connecting head close to the mounting portion. The guide fixing block, the groove wall of the sliding groove and the groove wall of the stop groove define the movable space of the slider.

7. The non-loose fastening structure according to claim 6, characterized in that: A plurality of guide parts are arranged on one end of the guide fixing block facing the connecting head. The guide parts are distributed at intervals along the circumference of the connecting rod, and the guide parts are used to guide the sliding block to rotate along the first rotation direction.

8. The non-loose fastening structure according to claim 7, characterized in that: The guide portion comprises a fourth guide surface and a fifth guide surface sequentially arranged along the first rotation direction, the fourth guide surface is inclined toward a direction close to the connector along the first rotation direction, and the fifth guide surface is inclined toward a direction close to the mounting portion along the first rotation direction; And / or, a sixth guide surface is provided at the end of the sliding block close to the mounting portion, and the sixth guide surface is inclined along the first rotation direction toward a direction close to the mounting portion to guide the sliding block to slide through the guide portion along the first rotation direction.

9. The non-loose fastening structure according to claim 6, characterized in that: One of the guide fixing block and the connector has a connecting hole, and the other of the guide fixing block and the connector has a mounting block, and the mounting block is interference-fitted with the connecting hole.

10. The non-loose fastening structure according to any one of claims 1 to 9, characterized in that: The elastic member is sleeved on the connecting rod, the elastic member is located on a side of the rotating cover close to the mounting portion, and the elastic member abuts against the rotating cover; And / or, the mounting portion is a threaded portion or a riveted portion.

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