A type of buckle

Abstract

This application discloses a snap fastener for limiting the position of multiple plates in a stacked state. The snap fastener includes a snap connector at the lower end, a connecting shaft at the middle end, and a limiting cover at the upper end. The snap connector is adapted to move axially into and out of the plates, and the plates include a bottom plate at the bottom. The snap connector includes at least one radially protruding limiting rib. The bottom plate has a snap hole with a polygonal cross-section. The polygonal structure has a straight line connecting the midpoint and the vertex. When the limiting rib is aligned with the straight line, the snap connector is adapted to move axially into and out of the snap hole, thus entering an active state. When the limiting rib passes through the bottom plate, the plates are all sleeved on the connecting shaft, and the limiting cover abuts against the top plate. At this time, rotating the snap connector circumferentially causes the limiting rib to misalign with the straight line, making the limiting rib abut against the bottom plate and clamping the plates with the limiting cover, thus entering a locked state. The snap fastener of this application is simple and labor-saving to install.

Description

Technical Field

[0001] This application relates to the field of automotive parts technology, specifically to a type of clip. Background Technology

[0002] Nowadays, buckles are ubiquitous in our daily lives. Due to their convenience and stability, they are frequently seen in various fields.

[0003] For example, in the automotive parts industry, there exists a type of clip specifically designed for securing automotive plastic panels. Current technology typically uses a round-headed plastic clip. This clip generally includes a slot and a hole. The slot is a circular plastic piece used to enter and hold the automotive trim panel in place, while the hole is used to engage with the sheet metal holes in the door panel. During installation, the worker simply needs to forcefully push the trim panel with the clip into the sheet metal hole to complete the installation.

[0004] However, the above structure has the following drawbacks: it requires workers to hit it hard during installation, which is laborious and inconvenient. In addition, the plastic buckle mainly relies on its own shape to achieve the snap-fit, which is not stable enough. Moreover, it is easy to be damaged when disassembling and cannot be used repeatedly for a long time. Summary of the Invention

[0005] The purpose of this application is to provide a buckle that is highly stable and convenient.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows: a buckle for limiting the position of multiple plates in a stacked state, characterized in that: the buckle includes a buckle connector at the lower end, a connecting shaft at the middle end, and a limiting cover at the upper end; the buckle connector is adapted to enter and exit the plate along the axial direction; the plate includes a bottom plate at the bottom; the buckle connector includes at least one limiting rib protruding radially; the bottom plate is provided with a buckling hole; the cross-section of the buckling hole is polygonal.

[0007] The polygonal structure has a straight line connecting the midpoint and the vertex. When the limiting rib is aligned with the straight line, the snap-fit ​​connector is adapted to move in and out of the snap-fit ​​hole axially, thus entering the active state. When the limiting rib passes through the base plate, the plates are all sleeved on the connecting shaft, and the limiting cover abuts against the uppermost plate. At this time, the snap-fit ​​connector is rotated circumferentially so that when the limiting rib is misaligned with the straight line, the limiting rib is adapted to abut against the base plate and cooperate with the limiting cover to clamp the plate, thus entering the locked state.

[0008] The existing buckles are basically push-button type, which requires a lot of force to press the buckle into the snap-fit ​​hole when in use. This is laborious, inconvenient, and consumes a lot of energy for the workers. Moreover, since they are mostly made of nylon, they are very easy to damage the internal structure during disassembly by prying them open, resulting in scrap and waste. Furthermore, if there are no spare parts available, it will lead to an extremely difficult situation.

[0009] The buckle of this application adopts a rotary snap-fit ​​structure. It is inserted and rotated to achieve snap-fit, which is more labor-saving and convenient, and the connection is more stable. When disassembling, you only need to rotate it again to make the limiting rib disengage from the snap-fit ​​hole. Therefore, it is very convenient to disassemble and assemble. Moreover, the way workers exert force during disassembly and assembly is unlikely to damage the buckle structure. Therefore, the buckle of this application can be reused for a long time.

[0010] As a preferred embodiment, the snap-fit ​​connector and the limiting cover are separately provided, and the snap-fit ​​connector is adapted to rotate relative to the limiting cover. During the process of the snap-fit ​​changing from the active state to the locked state, the limiting cover remains stationary relative to the base plate.

[0011] As another preferred embodiment, the snap-fit ​​connector is fixedly connected to the lower end of the connecting shaft, and a connecting block is fixedly connected to the upper end of the connecting shaft. The limiting cover is provided with an insertion hole, and a stop block is provided below the insertion hole. The insertion hole and the stop block are circumferentially offset. When the limiting rib is aligned with the insertion hole, the snap-fit ​​connector is adapted to enter and exit the insertion hole axially. When the snap-fit ​​connector passes through the insertion hole and moves below the stop block, the snap-fit ​​connector is adapted to rotate circumferentially relative to the limiting cover. When the limiting rib rotates to be offset from the insertion hole, the limiting rib is adapted to abut against the stop block and cooperate with the connecting block to restrict the relative axial movement of the snap-fit ​​connector and the limiting cover.

[0012] Further preferably, when the limiting rib and the stop block are aligned and the snap connector is inserted into the snap hole, the stop block is adapted to be inserted into the snap hole synchronously, and when the snap connector rotates circumferentially, the stop block is adapted to abut against the inner wall of the snap hole, thereby achieving that the limiting cover is stationary relative to the base plate.

[0013] Further preferably, the limiting cover is provided with a placement groove, the connecting block is disposed in the placement groove and rotates circumferentially synchronously with the snap-fit ​​connector, and the placement groove is provided with a radially protruding limiting groove, the connecting block is provided with a radially protruding snap-fit ​​protrusion, the limiting groove and the snap-fit ​​protrusion are adapted to each other, when the snap-fit ​​protrusion enters the limiting groove, the snap-fit ​​protrusion cooperates with the limiting groove to restrict the circumferential rotation of the connecting block.

[0014] Further preferably, the limiting groove includes a first limiting groove and a second limiting groove. When the snap-fit ​​protrusion engages with the first limiting groove, the limiting rib and the insertion hole are aligned. When the snap-fit ​​protrusion engages with the second limiting groove, the limiting rib and the stop block are aligned. When the snap-fit ​​connector passes through the base plate and the connecting block is rotated, so that when the snap-fit ​​protrusion engages with the first limiting groove, the limiting rib is adapted to align with the perpendicular line between the midpoint and the edge of the polygonal structure.

[0015] Further preferably, the limiting cover is provided with an elastic ring formed by secondary injection molding, the limiting cover is provided with a placement groove, the top end of the elastic ring is adapted to extend upward and beyond the bottom surface of the placement groove, the bottom end of the elastic ring is adapted to extend downward and beyond the bottom surface of the limiting cover, and when the buckle and the plate are locked, the bottom end of the elastic ring is adapted to abut against the edge of the connecting hole in the uppermost plate.

[0016] Further preferably, the polygonal structure is a square, and the square has four straight connecting lines. Correspondingly, there are four limiting ribs that are evenly arranged circumferentially on the side wall of the snap connector, and the limiting ribs have a fin-shaped structure that gradually decreases in size from top to bottom.

[0017] In a further preferred embodiment, the limiting cover is provided with a skirt that is angled downwards. When the buckle and the plate are locked, the skirt is adapted to abut against the plate that is located at the top.

[0018] Further preferably, a knob is fixedly provided on the connecting block.

[0019] Compared with the prior art, the beneficial effects of this application are as follows:

[0020] This application employs a rotating snap-fit ​​connector, allowing the snap-fit ​​to engage by rotating it after insertion into the snap-fit ​​hole. Compared to the traditional pressing type, this method is more labor-saving and convenient. Furthermore, the interlocking between the limiting rib and the plate provides greater stability compared to the traditional snap-fit ​​method that utilizes the snap-fit's own shape. Moreover, the snap-fit ​​can be easily removed by simply rotating it again, effectively preventing damage to the structure and extending its service life. Attached Figure Description

[0021] Figure 1 This is a structural diagram of the snap-fit ​​plate body in this application.

[0022] Figure 2 This is an exploded view of the clips and plate body of this application.

[0023] Figure 3 This is a schematic diagram of the base plate of this application.

[0024] Figure 4 This is a schematic diagram of the snap-fit ​​and base plate in the open state of this application.

[0025] Figure 5 This is a schematic diagram of the snap-fit ​​and base plate locked in the present application.

[0026] Figure 6 This is an exploded view of the clip in this application.

[0027] Figure 7 This is a schematic diagram of the structure of the snap-fit ​​limiting cover in this application.

[0028] Figure 8 This is a top view of the retaining cover in the snap fastener of this application.

[0029] Figure 9 This is a top view of the buckle of this application when it is engaged with the snap-fit ​​protrusion and the first limiting groove.

[0030] Figure 10 This is a schematic diagram of the structure of the buckle in this application when it engages with the snap-fit ​​protrusion and the first limiting groove.

[0031] Figure 11 This is a schematic diagram of the connection between the buckle of this application and the base plate when the buckle engages with the snap-fit ​​protrusion and the first positioning groove.

[0032] Figure 12 This is a top view of the buckle of this application when it engages with the snap-fit ​​protrusion and the second-position limiting groove.

[0033] Figure 13 This is a schematic diagram of the structure of the buckle in this application when it engages with the snap-fit ​​protrusion and the second-position limiting groove.

[0034] Figure 14 This is a schematic diagram of the connection between the buckle and the base plate when the buckle engages with the snap-fit ​​protrusion and the second-position limiting groove.

[0035] Figure 15 This is a cross-sectional view of the elastic ring in the buckle of this application under no external force.

[0036] Figure 16 This is a cross-sectional view of the elastic ring in the buckle of this application under the compression of the limiting block and the plate.

[0037] Figure 17 This is a schematic diagram of another embodiment of the snap-fit ​​base plate of this application.

[0038] Figure 18 This is a schematic diagram of another embodiment of the snap-fit ​​base plate of this application.

[0039] In the diagram: 1. Snap-fit ​​connector; 11. Limiting rib; 2. Coupling shaft; 3. Limiting cover; 31. Insertion hole; 32. Stop block; 33. Placement groove; 331. First-position limiting groove; 332. Second-position limiting groove; 34. Skirt; 400. Base plate; 401. Snap-fit ​​hole; 5. Connecting block; 51. Snap-fit ​​protrusion; 52. Knob; 6. Elastic ring. Detailed Implementation

[0040] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0041] In the description of this application, it should be noted that the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., which indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application 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 should not be construed as limiting the specific protection scope of this application.

[0042] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0043] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0044] Nowadays, buckles are ubiquitous in our daily lives. Due to their convenience and stability, they are frequently seen in various fields.

[0045] For example, in the automotive parts industry, there exists a type of clip specifically designed for securing automotive plastic panels. Current technology typically uses a round-headed plastic clip. This clip generally includes a slot and a hole. The slot is a circular plastic piece used to enter and hold the automotive trim panel in place, while the hole is used to engage with the sheet metal holes in the door panel. During installation, the worker simply needs to forcefully push the trim panel with the clip into the sheet metal hole to complete the installation.

[0046] However, the above structure has the following drawbacks: it requires workers to hit it hard during installation, which is laborious and inconvenient. In addition, the plastic buckle mainly relies on its own shape to achieve the snap-fit, which is not stable enough. Moreover, it is easy to be damaged when disassembling and cannot be used repeatedly for a long time.

[0047] Therefore, as an improvement, such as Figures 1-16 As shown, the preferred embodiment of this application is as follows:

[0048] A buckle is used to limit the position of multiple plates in a stacked state. The buckle includes a buckle 1 at the lower end, a connecting shaft 2 at the middle end, and a limiting cover 3 at the upper end. The buckle 1 is adapted to enter and exit the plate in the axial direction. The plate includes a bottom plate 400 at the bottom. The buckle 1 includes at least one limiting rib 11 protruding radially. The bottom plate 400 is provided with a buckle hole 401. The cross-section of the buckle hole 401 is polygonal.

[0049] The polygonal structure has a straight line connecting the midpoint and the vertex. When the limiting rib 11 is aligned with the straight line, the snap-fit ​​connector 1 is adapted to move in and out of the snap-fit ​​hole 401 along the axial direction, thus entering the active state. When the limiting rib 11 passes through the base plate 400, the plates are all sleeved on the connecting shaft 2, and the limiting cover 3 abuts against the plate set at the top. At this time, the snap-fit ​​connector 1 is rotated circumferentially so that when the limiting rib 11 is misaligned with the straight line, the limiting rib 11 is adapted to abut against the base plate 400 and cooperate with the limiting cover 3 to clamp the plate, thus entering the locked state.

[0050] The aforementioned structure incorporates a rotary snap-fit ​​connector 1, allowing the snap-fit ​​of this application to be engaged by rotating it after insertion into the snap-fit ​​hole 401. Compared to the traditional press-type snap-fit, this method is more labor-saving and convenient. Furthermore, the abutment between the limiting rib 11 and the plate body provides greater stability compared to the traditional snap-fit ​​method that utilizes the shape of the snap-fit ​​itself. Moreover, the snap-fit ​​of this application can be easily removed by simply rotating it again, effectively preventing damage to the structure and extending its service life.

[0051] like Figures 3-5 As shown in this application, the snap-fit ​​hole 401 on the base plate 400 is a polygonal structure. In the polygonal structure, there is a straight line X1 connecting the midpoint and the vertex. This straight line X1 is the line with the longest straight distance among the lines connecting the midpoint to each point on the side. Therefore, it is only necessary to set the straight distance of the limiting rib 11 to match X1 so that it can be inserted into the snap-fit ​​hole 401 in a state aligned with X1. Since X1 is usually the longest line, when the length of the limiting rib 11 matches the length of X1, when the limiting rib 11 is inserted into the snap-fit ​​hole 401, after any angle of rotation, the limiting rib 11 will basically have a part that extends beyond the snap-fit ​​hole 401, thereby abutting against the base plate 400 and achieving snap-fit. The above structure is simple and stable, and easy to operate.

[0052] In this embodiment, the polygonal structure is a square with four straight lines. Correspondingly, there are four limiting ribs 11 evenly distributed circumferentially on the side wall of the snap-fit ​​connector 1, and the limiting ribs 11 are fin-shaped structures that gradually decrease in size from top to bottom. The square structure has the advantages of simplicity and ease of generation. Since a square has four vertices, i.e., four X1, for the sake of structural neatness, aesthetics, and maximum stability, there are also four limiting ribs 11 evenly distributed on the snap-fit ​​connector 1, and the limiting ribs 11 are fin-shaped structures that gradually decrease in size from top to bottom. This makes the snap-fit ​​connector 1 have an overall arrow-shaped structure. This structure has strong penetration ability and a self-adjusting function, which makes it more convenient to insert into the snap-fit ​​hole 401. Even with a certain amount of deviation, it can achieve automatic correction.

[0053] Or, such as Figure 17 As shown, in other embodiments, the polygonal structure can also be triangular. In this case, the snap-fit ​​hole 401 has three X1s. Correspondingly, the limiting ribs 11 can also be set to three, and the included angle between the limiting ribs 11 and the limiting ribs 11 is 120°.

[0054] Or, as Figure 18 As shown, in other embodiments, the polygonal structure can also be an irregular shape. In this case, although the snap-fit ​​hole 401 has six vertices, since two of the vertices are concave, the connection between them is relatively short. Therefore, when setting it, four limiting ribs 11 can still be set.

[0055] In summary, regardless of whether the structure of the snap-fit ​​hole 401 is a regular or irregular shape, a corresponding snap-fit ​​connector 1 structure can be designed to achieve rotational snap-fit. However, when the structure of the snap-fit ​​hole 401 is a regular shape, such as an equilateral triangle, a directional shape, or a regular pentagon, the overall structure is more reasonable and stable, more in line with common sense, easier to understand, and thus easier to produce and use.

[0056] Furthermore, the inventors of this application discovered that if the limiting cover 3 rotates with the snap-fit ​​connector 1, in actual use, it will cause the limiting cover 3 and the plate to move relative to each other frequently, and there will be friction between the two contact surfaces. On the one hand, this makes it more difficult for the workers to rotate the snap-fit ​​connector 1, resulting in high labor intensity. On the other hand, it will increase the wear of both, which is not conducive to maintaining their lifespan and thus achieving long-term cyclic use.

[0057] Therefore, in this embodiment, the snap-fit ​​connector 1 and the limiting cover 3 are separately configured, and the snap-fit ​​connector 1 is adapted to rotate relative to the limiting cover 3. During the process of the snap-fit ​​changing from the active state to the locked state, the limiting cover 3 remains stationary relative to the base plate 400. The above structure can effectively prevent relative displacement between the limiting cover 3 and the plate body during the rotation of the snap-fit ​​connector 1.

[0058] Specifically, such as Figures 6-14 As shown, in this embodiment, the snap-fit ​​connector 1 is fixedly connected to the lower end of the connecting shaft 2, and the upper end of the connecting shaft 2 is fixedly connected to the connecting block 5. The limiting cover 3 is provided with an insertion hole 31, and a stop block 32 is provided below the insertion hole 31. The insertion hole 31 and the stop block 32 are offset circumferentially. When the limiting rib 11 is aligned with the insertion hole 31, the snap-fit ​​connector 1 is adapted to enter and exit the insertion hole 31 axially. When the snap-fit ​​connector 1 passes through the insertion hole 31 and moves to below the stop block 32, the snap-fit ​​connector 1 is adapted to rotate circumferentially relative to the limiting cover 3. When the limiting rib 11 rotates to be offset from the insertion hole 31, the limiting rib 11 is adapted to abut against the stop block 32 and cooperate with the connecting block 5 to restrict the relative axial movement of the snap-fit ​​connector 1 and the limiting cover 3. To achieve a rotatable connection between the connector 1 and the limiting cover 3, this application adopts a method of setting an insertion hole 31 on the limiting cover 3, and inserting the connector 1 into the limiting cover 3. This structure is simple and stable, and reliably ensures that the limiting cover 3 and the connector 1 can rotate relative to each other while being stably connected.

[0059] Furthermore, this application also employs the technical means of setting a stop block 32 and setting the insertion hole 31 to be circumferentially offset from the stop block 32. The function of the stop block 32 is to ensure that the limiting cover 3 will not rotate. This is because the limiting cover 3 will be subjected to the downward pressure of the connecting block 5 during use, and the user needs to rotate the snap connector 1 while pressing down the connecting block 5. At this time, there is a certain friction between the connecting block 5 and the limiting cover 3, which may cause the limiting cover 3 to rotate. The presence of the stop block 32 can completely avoid this situation.

[0060] However, the presence of the stop block 32 reduces the insertion space of the connector 1. Therefore, the inventors of this application have configured the insertion hole 31 to be circumferentially offset from the stop block 32. Specifically, as shown in the figure... Figure 7 As shown, the stop blocks 32 are respectively set at the left, right, top, and bottom. Therefore, the insertion holes 31 are set to extend at the four oblique angles respectively. The above structure allows the insertion holes 31 to play a guiding role in advance. When the operator inserts the connector 1, he only needs to align the connector 1 and the insertion hole 31 to effectively ensure that the connector 1 will not contact the stop blocks 32 during the downward movement. It can move smoothly to below the stop blocks 32. Once the connector 1 moves to below the stop blocks 32, its circumferential rotation is no longer restricted by the stop blocks 32 and can rotate freely. Once the connector 1 rotates circumferentially, causing the limiting rib 11 and the insertion hole 31 to misalign, the limiting rib 11 will be restricted by the stop blocks 32 if it wants to move upward. In addition, the connecting block 5 at the upper end of the connecting shaft 2 can restrict the limiting rib 11 from moving downward, thereby realizing the axial limitation of the connector 1 and the limiting cover 3.

[0061] Specifically, in this embodiment, when the limiting rib 11 and the stop block 32 are aligned, and the snap connector 1 is inserted into the snap hole 401, the stop block 32 is adapted to be inserted into the snap hole 401 synchronously. Furthermore, when the snap connector 1 rotates circumferentially, the stop block 32 is adapted to abut against the inner wall of the snap hole 401, thereby achieving relative stillness of the limiting cover 3 relative to the base plate 400. The above structure is simple and stable, and can effectively ensure that the stop block 32 can cooperate with the inner wall of the snap hole 401, thereby achieving relative stillness of the limiting cover 3.

[0062] Furthermore, the inventors of this application discovered that if the rotation of the snap-fit ​​connector 1 is not restricted, in actual use, the snap-fit ​​connector 1 may rotate and detach after being affected by external forces such as vibration, resulting in insufficient stability and posing a significant danger. Therefore, if... Figure 8 As shown, in this embodiment, the limiting cover 3 is provided with a placement groove 33, the connecting block 5 is placed in the placement groove 33 and rotates circumferentially synchronously with the snap-fit ​​connector 1, and the placement groove 33 is provided with a radially protruding limiting groove, the connecting block 5 is provided with a radially protruding snap-fit ​​protrusion 51, the limiting groove and the snap-fit ​​protrusion 51 are adapted to each other, when the snap-fit ​​protrusion 51 enters the limiting groove, the snap-fit ​​protrusion 51 cooperates with the limiting groove to restrict the circumferential rotation of the connecting block 5. The placement groove 33 provides space for the connecting block 5 to rotate, while the limiting groove can restrict the rotation of the connecting block 5, that is, restrict the rotation of the snap-fit ​​connector 1, so that the snap-fit ​​connector 1 is fixed in a certain state. Therefore, as long as the position of the limiting groove is set in advance, the snap-fit ​​connector 1 can be adjusted to be 100% stable in a certain state, which is convenient for the staff to use.

[0063] Specifically, in this embodiment, the limiting groove includes a first limiting groove 331 and a second limiting groove 332. When the snap-fit ​​protrusion 51 engages with the first limiting groove 331, the limiting rib 11 and the insertion hole 31 are aligned. When the snap-fit ​​protrusion 51 and the second limiting groove 332 engage, the limiting rib 11 and the stop block 32 are aligned. When the snap-fit ​​connector 1 passes through the base plate 400 and the connecting block 5 is rotated, the limiting rib 11 is adapted to align with the perpendicular line between the midpoint and the edge of the polygonal structure when the snap-fit ​​protrusion 51 engages with the first limiting groove 331.

[0064] The limiting groove has two positions: a first limiting groove 331 and a second limiting groove 332. When the engaging protrusion 51 engages with the first limiting groove 331, the locking state is as follows: Figure 9 and Figure 10 As shown, at this time, the limiting rib 11 and the insertion hole 31 are aligned, and the stop block 32 is misaligned. Therefore, the snap-fit ​​connector 1 can move smoothly axially within the insertion hole 31. When the limiting rib 11 moves below the stop block 32, and the snap-fit ​​protrusion 51 rotates to engage with the second limiting groove 332, the snap-fit ​​state is as follows. Figure 12 and Figure 13As shown, at this time, the limiting rib 11 and the stop block 32 are aligned, and the stop block 32 and the limiting rib 11 can be smoothly and synchronously inserted into the snap-fit ​​hole 401.

[0065] In summary, the installation process for this product is as follows:

[0066] 1. Make the snap-fit ​​protrusion 51 engage with the first stop limiting groove 331, and move the snap-fit ​​connector 1 axially downward;

[0067] 2. When the snap-fit ​​connector 1 moves to below the stop block 32, rotate the connecting block 5 to make the snap-fit ​​protrusion 51 and the second limit groove 332 engage, complete the assembly, and enter the combined state.

[0068] After assembly, the usage procedure for this product is as follows:

[0069] 1. For example Figure 14 As shown, in the combined configuration, the limiting rib 11 and the stop block 32 can be inserted into the snap-fit ​​hole 401 simultaneously and moved until the limiting rib 11 completely passes through the snap-fit ​​hole 401.

[0070] 2. For example Figure 11 As shown, rotating the connecting block 5 causes the snap-fit ​​protrusion 51 to engage with the first snap-fit ​​groove again. At this time, the limiting rib 11 and the base plate 400 abut against each other, thereby achieving locking.

[0071] It is worth mentioning that in this embodiment, when the snap-fit ​​protrusion 51 and the first snap-fit ​​groove are engaged, the limiting rib 11 is adapted to align with the perpendicular line between the midpoint and the edge of the polygonal structure. In this state, the limiting rib 11 extends horizontally beyond the snap-fit ​​hole 401 to the maximum extent, that is, it abuts against the base plate 400 to the maximum extent, thus achieving the strongest stability. To achieve the above effect, it is only necessary to set the included angle between the first snap-fit ​​groove and the second snap-fit ​​groove according to the actual situation during setup. For example, in this embodiment, since the snap-fit ​​hole 401 is square, the included angle between the line X1 connecting the midpoint and the vertex and the perpendicular line X2 connecting the midpoint and the edge is 45°. Setting the first snap-fit ​​groove and the second snap-fit ​​groove at this angle in advance can achieve the function of automatic locking and stabilizing this state.

[0072] In other embodiments, such as Figure 17 In an equilateral triangle, the angle between the line X1 connecting the midpoint and a vertex and the perpendicular X2 from the midpoint to a side is 60°. Figure 18 As shown, in this irregular shape, the angle between the line X1 connecting the midpoint and the vertex and the perpendicular line X2 connecting the midpoint and the side is also 45°. Therefore, the specific angle needs to be adjusted according to the specific structure.

[0073] Furthermore, in this embodiment, the snap-fit ​​protrusions 51, like the limiting grooves, are arranged in pairs in each group and are symmetrically arranged. The above structure plays a role in increasing stability.

[0074] Furthermore, such as Figure 15 and Figure 16 As shown, in this embodiment, the limiting cover 3 is provided with an elastic ring 6 formed by secondary injection molding. The limiting cover 3 is provided with a placement groove 33. The top end of the elastic ring 6 is adapted to extend upward and beyond the bottom surface of the placement groove 33, and the bottom end of the elastic ring 6 is adapted to extend downward and beyond the bottom surface of the limiting cover 3. When the buckle and the plate are locked, the bottom end of the elastic ring 6 is adapted to abut against the edge of the connecting hole in the uppermost plate.

[0075] like Figure 15 As shown, without external force, the top end of the elastic ring 6 is adapted to extend upwards and beyond the bottom surface of the placement groove 33, and the bottom end of the elastic ring 6 is adapted to extend downwards and beyond the bottom surface of the limiting cover 3, while... Figure 16 As shown, when the connecting block 5 is pressed into the placement groove 33, thereby driving the limiting cover 3 to press down the plate, the top of the elastic ring 6 will be squeezed by the connecting block 5, and the bottom of the elastic ring 6 will abut against the edge of the connecting hole in the uppermost plate.

[0076] The functions of the top of the elastic ring 6 are as follows: 1. Since the connecting block 5 needs to rotate under pressure, it will have a certain amount of friction with the surface of the placement groove 33. Long-term use can easily cause wear. The elastic ring 6 can replace the placement groove 33 to bear the main friction, thereby increasing the service life. 2. When the connecting block 5 presses down on the elastic ring 6, the snap-fit ​​connector 1 passes through the base plate 400 and rotates, so that the limiting rib 11 and the base plate 400 abut against each other. When released, based on the rebound, the elastic ring 6 will give the connecting block 5 an upward force, so that the limiting rib 11 is subjected to an upward force, making the connection with the base plate 400 tighter and more stable.

[0077] The function of the bottom end of the elastic ring 6 is as follows: when the limiting cover 3 contacts the top plate, the bottom end of the elastic ring 6 will abut against the edge of the connecting hole in the uppermost plate, thereby playing a role in waterproofing and dustproofing.

[0078] It is worth mentioning that the elastic ring 6 is made by secondary injection molding, which makes the connection between the elastic ring 6 and the limiting cover 3 tighter.

[0079] Furthermore, in this embodiment, the limiting cover 3 is provided with a downwardly angled skirt 34. When the buckle and the plate are locked, the skirt 34 is adapted to abut against the uppermost plate. The above structure serves the functions of sealing and noise reduction.

[0080] Furthermore, in this embodiment, a knob 52 is fixedly provided on the connecting block 5. The above structure provides a force carrier for the operator to rotate the connecting block 5, making the buckle of this application simpler and easier to use.

[0081] Furthermore, in this embodiment, the elastic ring 6 is made of TPE, which has good anti-slip and anti-wear properties, while the limiting cover 3, the snap connector 1, and the connecting shaft 2 are made of POM, which has high tensile strength, fatigue resistance, creep resistance, and good dimensional stability.

[0082] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A latch for limiting the position of multiple plates in a stacked state, characterized in that: The buckle includes a snap-fit ​​connector at the lower end, a connecting shaft at the middle end, and a limiting cover at the upper end. The snap-fit ​​connector is adapted to enter and exit the plate body axially. The plate body includes a bottom plate at the lowest point. The snap-fit ​​connector includes at least one limiting rib protruding radially. The bottom plate is provided with a snap-fit ​​hole, and the cross-section of the snap-fit ​​hole is polygonal. The polygonal structure has a straight line connecting the midpoint and the vertex. When the limiting rib is aligned with the straight line, the snap-fit ​​connector is adapted to move in and out of the snap-fit ​​hole axially, thereby entering the active state. When the limiting rib passes through the base plate, the plates are all sleeved on the connecting shaft, and the limiting cover abuts against the plate at the top. At this time, the snap-fit ​​connector is rotated circumferentially so that when the limiting rib is misaligned with the straight line, the limiting rib is adapted to abut against the base plate and cooperate with the limiting cover to clamp the plate, thereby entering the locking state. The snap connector and the limiting cover are separately provided, and the snap connector is adapted to rotate relative to the limiting cover. During the process of the snap fastener changing from the active state to the locked state, the limiting cover is stationary relative to the base plate. The snap-fit ​​connector is fixedly connected to the lower end of the connecting shaft, and a connecting block is fixedly connected to the upper end of the connecting shaft. The limiting cover has an insertion hole, and a stop block is provided below the insertion hole. The insertion hole and the stop block are circumferentially offset. When the limiting rib is aligned with the insertion hole, the snap-fit ​​connector is adapted to enter and exit the insertion hole axially. When the snap-fit ​​connector passes through the insertion hole and moves below the stop block, the snap-fit ​​connector is adapted to rotate circumferentially relative to the limiting cover. When the limiting rib rotates to be offset from the insertion hole, the limiting rib is adapted to abut against the stop block and cooperate with the connecting block to restrict the relative axial movement of the snap-fit ​​connector and the limiting cover. The limiting cover is provided with a placement groove, the connecting block is placed in the placement groove and rotates circumferentially synchronously with the snap-fit ​​connector, and the placement groove is provided with a radially protruding limiting groove, the connecting block is provided with a radially protruding snap-fit ​​protrusion, the limiting groove and the snap-fit ​​protrusion are adapted to each other, when the snap-fit ​​protrusion enters the limiting groove, the snap-fit ​​protrusion cooperates with the limiting groove to restrict the circumferential rotation of the connecting block; The limiting groove includes a first limiting groove and a second limiting groove. When the snap-fit ​​protrusion engages with the first limiting groove, the limiting rib and the insertion hole are aligned. When the snap-fit ​​protrusion engages with the second limiting groove, the limiting rib and the stop block are aligned. When the snap-fit ​​connector passes through the base plate and the connecting block is rotated so that when the snap-fit ​​protrusion engages with the first limiting groove, the limiting rib is adapted to align with the perpendicular line between the midpoint and the edge of the polygonal structure.

2. The buckle of claim 1, wherein: When the limiting rib and the stop block are aligned, and the snap connector is inserted into the snap hole, the stop block is adapted to be inserted into the snap hole synchronously, and when the snap connector rotates circumferentially, the stop block is adapted to abut against the inner wall of the snap hole, thereby achieving that the limiting cover is stationary relative to the base plate.

3. The buckle of claim 1, wherein: The limiting cover is provided with an elastic ring formed by secondary injection molding. The limiting cover is provided with a placement groove. The top end of the elastic ring is adapted to extend upward and beyond the bottom surface of the placement groove. The bottom end of the elastic ring is adapted to extend downward and beyond the bottom surface of the limiting cover. When the buckle and the plate are locked, the bottom end of the elastic ring is adapted to abut against the edge of the connecting hole in the uppermost plate.

4. The clasp of claim 1, wherein: The polygonal structure is a square, and the square has four straight connecting lines. Correspondingly, there are four limiting ribs that are evenly arranged on the side wall of the snap connector along the circumference, and the limiting ribs have a fin-shaped structure that gradually decreases in size from top to bottom.

5. The buckle of claim 1 wherein: The limiting cover is provided with a skirt that is angled downwards. When the buckle and the plate are locked, the skirt is adapted to abut against the plate that is located at the top.

6. The buckle of claim 1 wherein: A knob is fixedly installed on the connecting block.

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