Center lock and tent

Abstract

The utility model discloses a center lock and a tent. The center lock comprises a connecting piece which comprises a top cap and a bottom cap, and the top cap and the bottom cap can move up and down relatively; the center rod is arranged between the top cap and the bottom cap and between the center rod and the connecting piece; and the locking assembly is arranged between the central rod and the connecting piece. When the center lock is in the locking state, the locking assembly is locked, and the locking assembly provides first locking force enabling the shielding product to be stably in the unfolding state. When the center lock is in the keeping state, the locking assembly fixedly connects the bottom cap, the center lock and the top cap through second locking force, and the second locking force is smaller than the first locking force; when the center lock is in the unlocking state, the locking assembly is unlocked to allow the bottom cap and the top cap to move relatively. The center lock has a maintaining state, the center rod and the connecting piece can be maintained to be locked, but the locking force is small, and therefore unlocking can be conveniently achieved under the action of small operation external force.

Description

Technical Field

[0001] The utility model relates to a central lock and a tent, in particular to a tent which is more convenient to fold and operate. Background Art

[0002] Sheltering products such as tents are generally used for outdoor activities and are stably supported on the ground when in use. One type of tent is a foldable tent that can be folded when not in use, thus facilitating packaging, transportation, storage, etc. For example, a foldable tent disclosed in CN107476647A includes a plurality of column components and a plurality of top rod components. Each top rod component includes a first top rod and a second top rod. The inner ends of the first top rods are rotatably connected to each other. The outer end of the first top rod and the inner end of the second top rod of each top rod component are rotatably connected. The outer end of the second top rod and the upper end of the column component are rotatably connected. When the tent is in the unfolded state, the first top rod and the second top rod are respectively unfolded relative to each other, and the plurality of columns are relatively far away from each other. When the tent is in the folded state, the first top rod and the second top rod are respectively close to each other, and the plurality of columns are close to each other. When folding this tent, the user first unlocks the locking connection structure (central lock) in the center of the tent top inside the tent and then drills out of the tent. Once unlocked, the top rod components flip relative to each other. During the flipping process, at least part of the top rod moves downward and occupies the space below. The user needs to bend down to drill out of the tent. Such tents have some defects. The user needs to enter and exit the tent during the process of folding the tent to perform corresponding operations (unlock the central lock inside the tent). In some cases, the user even needs to bend down to reduce the height to smoothly enter and exit, and the use is not convenient enough.

[0003] The above information disclosed in the background art section is only used to enhance the understanding of the background of the present application. Therefore, it may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Utility Model

[0004] The utility model relates to a central lock which has a holding state and can maintain the relative fixed connection between the central rod and the connecting piece, but the locking force of the locking component is relatively small, so that it can be easily unlocked under the action of a relatively small operating external force. The utility model also relates to a tent having the central lock. When the tent needs to be folded, the user converts the central lock from the locked state to the holding state inside the tent. At this time, the tent remains unfolded, and the user can conveniently move outside the tent. Outside the tent, a relatively small operating external force is applied to the central lock through the top rod unit, and the central lock can be completely unlocked, and the tent can be folded outside, which is more convenient to use.

[0005] The first aspect of the utility model provides a central lock for locking a sheltering product in the unfolded state. The central lock includes:

[0006] A connecting member for connecting the rods of the shielding product, the connecting member includes a top cap and a bottom cap located below the top cap, and the top cap and the bottom cap are arranged to be relatively movable up and down;

[0007] A central rod is arranged between the top cap and the bottom cap;

[0008] A locking assembly is arranged between the central rod and the connecting member;

[0009] Wherein, the central lock has a locked state, an unlocked state and a holding state between the locked state and the unlocked state;

[0010] When the central lock is in the locked state, the locking assembly is locked so that the bottom cap, the central rod and the top cap are fixedly connected, and the locking assembly provides a first locking force to keep the shielding product stably in the unfolded state;

[0011] When the central lock is in the holding state, the locking assembly is locked with a second locking force and fixes the bottom cap, the central rod and the top cap together, and the second locking force is less than the first locking force to allow the central lock to be switched to the unlocked state outside the shielding product;

[0012] When the central lock is in the unlocked state, the locking assembly is unlocked to allow the top cap and the bottom cap to move relative to each other.

[0013] In some embodiments, the locking assembly is movably arranged on the central rod. In the locked state, the locking assembly and the bottom cap are locked with each other. In the holding state, the locking assembly and the bottom cap are locked or in contact with each other. In the unlocked state, the locking assembly and the bottom cap are separated from each other.

[0014] In some embodiments, when the central lock is in the locked state, the top cap and the bottom cap have a first distance. When the central lock is in the unlocked state, the top cap and the bottom cap have a second distance, and the first distance is greater than the second distance; a first elastic member is arranged between the top cap and the bottom cap to provide a boosting force for the top cap and the bottom cap to move away from each other. More preferably, the first elastic member is a compression spring.

[0015] In some specific and preferred embodiments, the locking assembly includes a handle movably sleeved on the central rod, and the handle can rotate and move up and down relative to the bottom cap; a locking protrusion is provided on the handle, and a locking groove is provided on the bottom cap. When the locking protrusion is located in the locking groove, the central lock is in a locked state; a limiting groove is further provided on the bottom cap, and the limiting groove is located below the locking groove and is communicated with each other through a sliding groove. The limiting groove has an upper groove wall and an open bottom. After the locking protrusion enters the limiting groove, the central lock is in a holding state. At this time, the locking protrusion abuts against the upper groove wall and can move from the bottom of the limiting groove to below the bottom cap under the action of an external force.

[0016] More preferably, the central lock further includes a second elastic member, and the second elastic member is disposed between the handle and a limiting section on the central rod. In the holding state, the second elastic member is in a deformed state to prevent the locking protrusion from disengaging downward from the bottom of the limiting groove. Optionally, the second elastic member is a compression spring.

[0017] More preferably, the sliding groove extends substantially in the vertical direction, and the locking groove and the limiting groove respectively extend laterally to the same side from the upper end and the lower end of the sliding groove; the locking groove has an open end and a closed end opposite to the open end, and the bottom cap further has a guiding inclined surface facing downward, and the guiding inclined surface extends obliquely downward from the open end of the locking groove. During the process of the central lock being converted to the locked state, the guiding inclined surface contacts the locking protrusion and enters the open end of the locking groove; the central lock further includes a third elastic member, and the third elastic member is disposed between the handle and the central rod to provide an elastic force for rotating the handle so that the locking protrusion moves to the closed end of the locking groove. Optionally, the third elastic member is a tension spring.

[0018] In some specific and preferred embodiments, the central lock further includes a lock seat provided on the central rod and located below the bottom cap, and the locking assembly includes a rotary lock catch pivotally connected to the lock seat or the central rod. The rotary lock catch has a first locking hook and a second locking hook, and the first locking hook and the second locking hook are respectively located on opposite sides of the pivot; when the central lock is in the locked state, the first locking hook and the bottom cap are locked to each other and have a first locking surface in contact and cooperation, and at this time, there is a first included angle between the first locking surface and the horizontal plane; when the central lock is in the holding state, the first locking hook disengages from the bottom cap, the second locking hook and an unlocking lock catch provided on the bottom cap are locked to each other and have a second locking surface in contact and cooperation. The second locking surface is an inclined surface, and at this time, there is a second included angle between the second locking surface and the horizontal plane. The second included angle is greater than the first included angle and less than 90 degrees.

[0019] More preferably, the center lock also includes a fourth elastic member, which is arranged between the unlocking lock catch and the lock seat or the center rod, so as to keep the rotating lock catch in an initial position when the center lock is in an unlocked state and drive the first locking surface and the bottom cap to contact and cooperate; in this initial position, the top inclined surface of the first lock hook is located directly below a bottom inclined surface of the bottom cap, so that when the top inclined surface and the bottom inclined surface slide relative to each other, the first lock hook is pushed outward to cause the fourth elastic member to deform.

[0020] More preferably, the unlocking lock buckle can be telescopically arranged in the bottom cap.

[0021] More preferably, the first angle is 0-10°, and the second angle is 45-85°.

[0022] More preferably, a first locking hole recessed inwardly is provided on the outer surface of the bottom cap, and in a locked state, the first locking hook is inserted into the first locking hole, and the first locking surface is in tight contact with a bottom groove wall of the first locking hole.

[0023] More preferably, the unlocking lock buckle can be telescopically arranged in the bottom cap.

[0024] More preferably, the lower part of the unlocking lock buckle is provided with a second lock hole recessed outward, and the second lock hole and the outer surface of the center rod are opposite to each other. When in the holding state, the second lock hook is inserted into the second lock hole, and the inclined bottom of the second lock hook and the second lock hole contact each other to provide the second locking force.

[0025] More preferably, the fourth elastic member is a torsion spring.

[0026] The second aspect of the utility model provides a tent having an unfolded state and a folded state, the tent comprising a top frame and a plurality of supporting legs extending up and down, the top frame being supported by the plurality of supporting legs, the area between the top frame and the plurality of supporting legs being an internal space; the top frame comprising a plurality of top rod units, each of the top rod units comprising an inner top rod, an outer top rod and an oblique rod capable of being relatively flipped, the outer end of the oblique rod being rotatably connected to the inner top rod;

[0027] The tent also includes the central lock, and each of the top rod units is rotatably connected via the central lock, wherein the inner end of each inner top rod is rotatably connected to the top cap, and the inner end of each diagonal rod is rotatably connected to the bottom cap; when the tent is converted from an unfolded state to a folded state, the central lock is unlocked and kept in a holding state, and then the top rod unit is operated outside the internal space to convert the central lock into an unlocked state, and each of the top rod units is folded close to each other.

[0028] Another aspect of the present utility model provides a folding method for a tent, which includes the following steps: converting the central lock from the locked state to the holding state to keep the tent in the deployed state; rotating the outer top rod to turn it downward, causing the bottom cap to move relative to the top cap and completely disengage from the locking assembly, converting the central lock to the unlocked state, bringing the respective top rod units closer together, bringing the respective support legs closer together, and converting the tent to the folded state.

[0029] Another aspect of the present utility model provides an unfolding method for a tent, which includes the following steps: rotating the outer top rod to turn it upward, releasing the first elastic member to push the top cap and the bottom cap away from each other, opening the respective top rod units, moving the respective support legs away from each other, and automatically converting the central lock to the locked state to lock the tent in the deployed state.

[0030] The present utility model adopts the above solutions and has the following advantages:

[0031] The central lock of the present utility model has a holding state, which can maintain the fixed connection between the central rod and the connecting member while the locking force of the locking assembly is relatively small, so that it can be easily unlocked under the action of a relatively small operating external force. For a tent using this central lock, when it is necessary to fold the tent, the user converts the central lock from the locked state to the holding state inside the tent. At this time, the tent remains deployed, and the user can conveniently move outside the tent. Outside the tent, a relatively small operating external force is applied to the central lock through the top cover unit, and the central lock can be completely unlocked, and the tent can be folded on the outside; during the folding process of the tent, the situation where the user bends down to enter and exit the tent can be avoided, and it is relatively convenient to use. Description of the Drawings

[0032] In order to more clearly illustrate the technical solutions of the present utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0033] Figure 1 Fig. is a perspective view of a tent in the deployed state according to Embodiment 1 of the present utility model.

[0034] Figure 2 For Figure 1 The partial enlarged view at A in

[0035] Figure 3 Fig. is a perspective view of a tent in the folded state according to Embodiment 1 of the present utility model.

[0036] Figure 4 Fig. is the disassembled area of a central lock according to Embodiment 1 of the present utility model, where the top cap is not shown.

[0037] Figure 5 Stereogram of a handle according to Embodiment 1 of the present utility model.

[0038] Figure 6 Schematic diagram of a central lock in a locked state according to Embodiment 1 of the present utility model.

[0039] Figure 7 Schematic diagram of a central lock in a holding state according to Embodiment 1 of the present utility model.

[0040] Figure 8 For Figure 7 Partial enlarged view at B in

[0041] Figure 9 Schematic diagram of a central lock in an unlocked state according to Embodiment 1 of the present utility model.

[0042] Figure 10 Another schematic diagram of a central lock in a holding state according to Embodiment 1 of the present utility model.

[0043] Figure 11 For Figure 10 Cross-sectional view taken along the C-C direction in

[0044] Figure 12 Another schematic diagram of a central lock in a holding state according to Embodiment 1 of the present utility model.

[0045] Figure 13 For Figure 12 Cross-sectional view taken along the D-D direction in

[0046] Figure 14 For Figure 13 Partial enlarged view at E in

[0047] Figure 15 Stereogram of a tent in an unfolded state according to Embodiment 2 of the present utility model.

[0048] Figure 16 For Figure 15 Partial enlarged view at F in

[0049] Figure 17 Exploded view of a central lock according to Embodiment 2 of the present utility model.

[0050] Figure 18 Schematic diagram of a central lock in a locked state according to Embodiment 2 of the present utility model.

[0051] Figure 19 Schematic diagram of a central lock in a holding state according to Embodiment 2 of the present utility model.

[0052] Figure 20 Schematic diagram of a central lock in the unlocked state according to Embodiment 2 of the present utility model.

[0053] Figure 21 Another schematic diagram of a central lock in the holding state according to Embodiment 2 of the present utility model.

[0054] Figure 22 For Figure 21 Cross-sectional view of the central lock in

[0055] Figure 23 For Figure 22 Partial enlarged view at H in

[0056] In the above figures,

[0057] tent; 200, top frame; 201, top rod unit; 202, outer telescopic unit; 300, support leg; 301, connecting rod; 302, sliding sleeve; 400, internal space;

[0058] 1, inner top rod; 2, outer top rod; 3, diagonal rod; 4, first elastic member; 5, central lock;

[0059] 51, top cap; 52, bottom cap; 53, central rod;

[0060] 521, lock groove; 521a, open end; 521b, closed end; 522, sliding groove; 523, limiting groove; 523a, upper groove wall; 523b, bottom; 524, guiding inclined surface; 531, limiting section; 54, handle; 541, locking projection; 542, lower cover; 543, second elastic member; 544, third elastic member;

[0061] 525, first lock hole; 526, bottom inclined surface; 532, lock seat; 55, rotary lock catch; 550, pivot; 551, first lock hook; 551a, first locking surface; 551b, top inclined surface; 552, second lock hook; 552a, second locking surface; 56, unlocking lock catch; 561, second lock hole; 562, lock catch cover; 563, unlocking spring; 57, fourth elastic member. Detailed implementation manners

[0062] The following elaborates on the preferred embodiments of the present utility model in conjunction with the accompanying drawings, so that the advantages and features of the present utility model can be more easily understood by those skilled in the art. It should be noted here that the description of these embodiments is for helping to understand the present utility model, but does not constitute a limitation to the present utility model. In addition, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0063] In this document, the directions or positional relationships indicated by the terms "up", "down", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present application.

[0064] Figures 1 to 23 The drawings are drawn in true proportion. To keep the specification concise, the proportions of each component are not listed one by one. However, the proportions and positions of each component should be regarded as part of the content of this specification. Example 1

[0065] The present embodiment provides a central lock, which is used in a shelter product, the shelter product has an unfolded state and a folded state, and the central lock can lock the shelter product in the unfolded state. In the present embodiment, the shelter product can be a tent with an unfolded state and a folded state, the tent is used in outdoor activities to provide shelter, such as sunshade or rain protection.

[0066] Reference Figures 1 to 3 As shown, the tent 100 includes a top frame 200 and a plurality of support legs 300 supporting the top frame 200. The top frame 200 is used to open or fix the top tarpaulin of the tent 100. The tent 100 may also include a cloth located on the side of the tent 100, and the cloth is spread out between adjacent support legs 300. The number of support legs 300 is not less than 3, such as 4 as shown in the accompanying drawings. The support legs 300 extend generally up and down, with the lower end of the support leg 300 standing on the ground and the upper part connected to the top frame 200. In some examples, the support legs 300 are telescopic support legs 300, including an upper rod and a lower rod that can be slidably connected (e.g., sleeved), so that the length of the support legs 300 can be adjusted. Figure 1 In the unfolded state shown, the support legs 300 are extended to place the top frame 200 in a higher position. Figure 1 The lower rods of the supporting legs 300 are not shown. Figure 3 In the folded state shown, the support legs 300 are retracted to reduce the overall folded height of the tent 100 for easy storage, transportation and storage.

[0067] The internal space 400 of the tent 100 is jointly defined by the top frame 200 and the support legs 300. The space directly below the top frame 200 is the internal space 400 of the tent 100. The top frame 200 includes a plurality of foldable top rod units 201, and the plurality of top rod units 201 are connected to a central lock 5 located at the top of the center of the tent 100; the number of top rod units 201 corresponds to the number of support legs 300, and the outer end of each top rod unit 201 is connected to the upper part of a corresponding support leg 300. The top frame 200 further includes a plurality of outer telescopic units 202, and one outer telescopic unit 202 is connected to the upper parts of every two adjacent support legs 300. The outer telescopic unit 202 can be folded and unfolded laterally, so that the support legs 300 move away from each other during the unfolding process and move closer to each other during the folding process. For example, the outer telescopic unit 202 is composed of a plurality of cross-shaped link assemblies hinged in sequence, and each cross-shaped link assembly includes two links 301 hinged to each other in the middle. Among the cross-shaped link assemblies connected to the support legs 300, one end of the upper link 301 is hinged to the upper end of the support leg 300, and one end of the lower link 301 is hinged to a sliding sleeve 302 on the support leg 300; when folding or opening, the sliding sleeve 302 can slide up and down on the support leg 300, and the outer telescopic unit 202 is relatively unfolded or folded.

[0068] Each top rod unit 201 includes an inner top rod 1 and an outer top rod 2 that can relatively flip. The inner top rods 1 of the respective top rod units 201 are rotationally connected through the central lock 5, and the outer end of the outer top rod 2 is hinged to the upper end of the support leg 300. In the embodiment shown in the drawings, the outer end of the inner top rod 1 and the inner end of the outer top rod 2 of each top rod unit 201 are directly pivotally connected to each other, the inner end of the inner top rod 1 is pivotally connected to the central lock 5, and the outer end of the outer top rod 2 is pivotally connected to the upper end of the support leg 300.

[0069] The central lock 5 includes an opening driving member, allowing the tent 100 to operate the outer top rod 2 or the opening driving member outside the internal space 400 during the process of converting from the folded state to the unfolded state, so that the inner top rod 1 flips upward relative to the outer top rod 2 to unfold. Specifically in the example shown in the drawings, the opening driving member is a first elastic member 4. When the user stands outside the tent 100 and the central lock 5 is not in the locked state, the tent 100 can be unfolded or folded by rotating the outer top rod 2.

[0070] During the process of the tent 100 converting from the folded state to the unfolded state, the central lock 5 locks each top rod unit 201 by operating the outer top rod 2 or the opening driving member outside the internal space 400. Specifically in the example shown in the drawings, when the user stands outside the tent 100 and rotates the outer top rod 2, the central lock 5 can be locked, that is, each top rod unit 201 is locked, so that the tent 100 is stably in the unfolded state.

[0071] The first elastic member 4 can be a compression spring, which provides assistance for the inner ejector rod 1 to flip upward and open. When the tent 100 is in the folded state, the first elastic member 4 is in a deformed state to push the inner ejector rod 1 to flip upward when the outer ejector rod 2 is operated.

[0072] Combined with Figures 4 to 14 As shown, the central lock 5 includes a connecting member for connecting to the top rod unit of the tent. The connecting member specifically includes a top cap 51 and a bottom cap 52 that moves up and down relative to the top cap 51. The top cap 51 is located above the bottom cap 52. The inner ejector rod 1 of each top rod unit 201 is rotatably connected to the top cap 51. Each top rod unit 201 further includes an inclined rod 3. The outer end of the inclined rod 3 is rotatably connected to the inner ejector rod 1, and the inner ends of the inclined rods 3 are respectively rotatably connected to the bottom cap 52. The first elastic member 4 is in contact with the bottom cap 52. In the example shown in the drawing, the first elastic member 4 is arranged between the top cap 51 and the bottom cap 52. When the tent 100 is in the unfolded state, the top cap 51 and the bottom cap 52 have a first distance, and the first elastic member 4 is in the original state, that is, not deformed; when the tent 100 is in the folded state, the top cap 51 and the bottom cap 52 have a second distance, and the first elastic member 4 is in a compressed state, and the first distance is greater than the second distance.

[0073] Furthermore, the first elastic member 4 is sleeved on a central rod 53. The central rod 53 is fixedly connected to or integral with the top cap 51, and the central rod 53 extends vertically downward from the top cap 51. The bottom cap 52 is slidably arranged on the central rod 53, preferably sleeved on the central rod 53. The compression spring as the first elastic member 4 is sleeved on the central rod 53, its upper end abuts on the top cap 51, and its lower end abuts on the bottom cap 52. When the tent 100 is folded, the bottom cap 52 moves upward, that is, approaches the top cap 51, and the distance between the two becomes shorter, and the compression spring is compressed. When the tent 100 is unfolded, after the user rotates the outer ejector rod 2 until the elastic restoring force of the compression spring is sufficient to overcome the constraint of the dead weight of the rod member, the compression spring pushes the bottom cap 52 to move away from the top cap 51, and the distance between the two becomes larger, so that the inner end of the inner ejector rod 1 moves upward relative to the bottom cap 52, and the inner ejector rod 1 flips upward and opens.

[0074] During the process of the tent 100 being converted from the unfolded state to the folded state, the central lock 5 is unlocked and placed in a holding state (such as Figures 7 to 8 and Figures 10 to 14 shown), and then the outer ejector rod 2 is operated outside the internal space 400 or the driving member is opened to convert the central lock 5 into an unlocked state, and the top rod units 201 approach each other. Specifically, when the tent 100 is in the unfolded state, the central lock 5 is in the locked state, as Figure 6 shown. When the tent 100 is in the folded state, the central lock 5 is in the unlocked state, as Figure 9 shown. During the folding process of the tent 100, the central lock 5 also has a holding state between the locked state and the unlocked state, such as Figures 7 to 8 and Figures 10 to 14As shown. In this holding state, the tent 100 can still be maintained in the deployed state, but applying a small force to the rods of the tent 100 can cause the tent 100 to fold under its own weight (for example, jiggling or rotating one of the outer top rods 2), and the central lock 5 is converted to the unlocked state.

[0075] The central lock 5 further includes a locking component that is movably disposed on the central rod 53. When the central lock 5 is in the locked state, the locking component and the bottom cap 52 are locked together to provide a first locking force that keeps the tent 100 stably in the deployed state. When the central lock 5 is in the unlocked state, the locking component and the bottom cap 52 are disengaged. When the central lock 5 is in the holding state, the locking component and the bottom cap 52 are in contact or locked together to provide a second locking force that is less than the first locking force, so that the tent 100 is maintained in the deployed state and allows the user to disengage the locking component from the bottom cap 52 when operating the outer top rod 2 outside the internal space 400, so that the central lock 5 is converted from the holding state to the unlocked state.

[0076] The locking component includes a handle 54 that is movably sleeved on the central rod 53, and the handle 54 can rotate and move up and down relative to the bottom cap 52. A locking protrusion 541 is provided on the handle 54, and a locking groove 521 is provided on the bottom cap 52 (as Figure 5 shown). When the locking protrusion 541 is located in the locking groove 521, the central lock 5 is in the locked state. A limiting groove 523 is also provided on the bottom cap 52. The limiting groove 523 is located below the locking groove 521 and is communicated with each other through a sliding groove 522. As Figure 8 and Figure 14 shown, the limiting groove 523 has an upper groove wall 523a and an open bottom 523b. After the locking protrusion 541 enters the limiting groove 523, the central lock 5 is in the holding state. At this time, the locking protrusion 541 abuts against the upper groove wall 523a and moves from the bottom 523b of the limiting groove 523 to below the bottom cap 52 after operating the outer top rod 2. The sliding groove 522 extends generally in the up and down direction, and the locking groove 521 and the limiting groove 523 extend laterally to the same side from the upper end and the lower end of the sliding groove 522 respectively. In the embodiment shown in the drawings, the locking groove 521 extends horizontally from the upper end of the sliding groove 522, the limiting groove 523 extends horizontally from the lower end of the sliding groove 522, and the locking groove 521 and the limiting groove 523 are on the same side of the sliding groove 522. The upper part of the handle 54 can be inserted into the bottom cap 52, and the locking protrusion 541 is provided on the upper part of the handle 54; when the central lock 5 is in the locked state and the holding state, the upper part of the handle 54 is inserted into the bottom cap 52 and is clamped between the bottom cap 52 and the central rod 53, as Figure 11 and Figure 13 shown.

[0077] The central lock 5 further includes a second elastic member 543. The second elastic member 543 is disposed between the handle 54 and the limiting section 531 on the central rod 53. When in the holding state, the second elastic member 543 is in a deformed state to prevent the locking protrusion 541 from disengaging downward from the bottom 523b of the limiting groove 523. The limiting section 531 is fixed on the lower part of the central rod 53. The handle 54 is sleeved on the central rod 53, and the limiting section 531 is located inside the handle 54. The second elastic member 543 is a compression spring, which is sleeved on the central rod 53, with its upper end abutted against the top of the handle 54 and its lower end abutted against the limiting section 531. When the handle 54 is pulled downward so that the locking protrusion 541 slides downward along the sliding groove 522 to the limiting groove 523, the second elastic member 543 is in a deformed state; after the handle 54 is rotated and enters the limiting groove 523, the elastic force of the second elastic member 543 has a tendency to push the handle 54 upward to reset, so that the locking protrusion 541 can be abutted against the upper groove wall 523a of the limiting groove 523, and thus will not move downward unexpectedly and disengage from the bottom 523b of the limiting groove 523. That is, the central lock 5 is maintained in the holding state by the second elastic member 543, so that it is convenient for the user to move to the outside of the tent 100 after operating the handle 54, and then operate the outer top rod 2 to completely fold the tent 100. At this time, the central lock 5 is converted to the unlocked state.

[0078] As Figure 8 shown, the lock groove 521 has an open end 521a and a closed end 521b opposite to the open end 521a. The bottom cap 52 further has a downward-facing guide inclined surface 524, and the guide inclined surface 524 extends downward and obliquely from the open end 521a of the lock groove 521. During the unfolding process of the tent 100, the guide inclined surface 524 contacts the locking protrusion 541 and enters the open end 521a of the lock groove 521. The bottom of the bottom cap 52 has a notch or a channel facing the guide inclined surface 524. During the unfolding process of the tent 100, the locking protrusion 541 enters and contacts the guide inclined surface 524 through the notch or the channel. Under the action of the guide inclined surface 524, the handle 54 moves upward and rotates, and the locking protrusion 541 enters the open end 521a of the lock groove 521 along the guide inclined surface 524. The guide inclined surface 524 can be a part of the groove wall of the sliding groove 522 or the upper groove wall 523a of an inclined groove communicating with the sliding groove 522.

[0079] Further, the central lock 5 further includes a third elastic member 544 disposed between the handle 54 and the central rod 53 to provide an elastic force for rotating the handle 54 so that the locking projection 541 moves into the closed end 521b of the locking groove 521. During the upward movement of the handle 54 relative to the bottom cap 52, the handle 54 rotates, causing the third elastic member 544 to twist and be in a deformed state; when the locking projection enters the open end 521a of the locking groove 521, the third elastic member 544 is released, and its elastic restoring force drives the handle 54 to rotate in the reverse direction, so that the locking projection enters the closed end 521b from the open end 521a of the locking groove 521. In the example shown in the attached drawings, the third elastic member 544 is a tension spring, the upper end of the tension spring is connected to the limiting section 531 of the central rod 53, and the lower end of the tension spring is connected to the lower cover 542 of the handle 54; after the handle 54 rotates, the tension spring is stretched and twisted. The number of the third elastic members 544 can be one or more. In some other embodiments, the third elastic member 544 can also be a torsion spring or a spring piece, etc., which is not limited herein.

[0080] Next, in conjunction with Figures 1 to 14 the method for deploying or folding the tent 100 of this embodiment will be described in detail.

[0081] The tent 100 is composed of Figure 1 the deployed state shown in Figure 3 When being converted to the folded state shown in Figure 3 , the central lock 5 is initially in the locked state. At this time, the user enters the tent 100 and rotates the handle 54 to move the locking projection 541 to the open end 521a (the upper end of the sliding groove 522) of the locking groove 521; then, the handle 54 is pulled downward to move the locking projection 541 downward along the sliding groove 522 (specifically, the vertically extending groove wall of the sliding groove 522) until it reaches the limiting groove 523; by rotating in the reverse direction or by means of the elastic force of the third elastic member 544, the handle 54 rotates in the reverse direction by a small angle, and the locking projection 541 enters the limiting groove 523 and is located below the upper groove wall 523a thereof. At this time, the central lock 5 is converted to the holding state, and a small second locking force is provided by the second elastic member 543 to keep the tent 100 in the deployed state. The user can move outside the tent 100 at this time; then, the user rotates the outer top rod 2 downward, the inner top rod 1 and the outer top rod 2 flip downward, the bottom cap 52 moves upward and completely disengages from the handle 54, the central lock 5 is converted to the unlocked state, each top rod unit 201 moves closer to each other, each support leg 300 moves closer to each other, and the tent 100 is converted to

[0082] The tent 100 is converted from Figure 3 the folded state shown in Figure 1When in the unfolded state as shown, the central lock 5 is initially in the unlocked state. At this time, under the reset of the third elastic member 544, the locking protrusion 541 faces the guiding inclined surface 524 on the bottom cap 52, that is, directly below the notch or channel at the bottom of the bottom cap 52. When the user pulls the outer top rod 2 upward outside the tent 100, the outer end of the inner top rod 1 moves upward accordingly, the first elastic member 4 is released, and its elastic force is sufficient to overcome the self-weight of the rod member, and then it pushes the bottom cap 52 away from the top cap 51, and the inclined rod 3 flips, so that each top rod unit 201 is opened. During the movement of the bottom cap 52, the bottom cap 52 and the handle 54 gradually approach, the locking protrusion 541 and the guiding inclined surface 524 come into contact and enter the open end 521a of the lock groove 521 under guidance, and then automatically move to the closed end 521b of the lock groove 521 under the elastic reset force of the third elastic member 544 to achieve complete locking, and the central lock 5 automatically switches to the locked state, locking the tent 100 in the unfolded state.

[0083] The above tent 100 has the following advantages: During the opening process of the tent 100, the user can operate outside the tent 100, avoiding entering the tent 100 to operate when the tent 100 is not fully opened, and the tent 100 can be automatically locked after being opened; during the folding process of the tent 100, after the user unlocks the central lock 5, the central lock 5 is in a holding state, and the tent 100 remains in the unfolded state so that the user can move outside the tent 100, and then operate outside the tent 100 to completely fold the tent 100, and the central lock 5 automatically switches from the holding state to the unlocked state. During the unfolding or folding process of the tent 100, it avoids the situation that the user bends down to enter and exit the tent 100 when the tent is not fully and stably opened, which is convenient and safe to use and has a good experience. Embodiment 2

[0084] This embodiment provides another different central lock, which is used in a shielding product. The shielding product has an unfolded state and a folded state, and the central lock can lock the shielding product in the unfolded state. In this embodiment, referring to Figure 14 and Figure 15 As shown, the shielding product can be a tent with an unfolded state and a folded state, and the tent is used in outdoor activities to provide shielding, such as sunshading or rain shielding, etc. The same Figures 1 to 3As shown, the tent 100 of this embodiment also includes a top frame 200 and a plurality of support legs 300 that support the top frame 200. The structures of the top frame 200 and the support legs 300 are the same as those of the tent 100 in Embodiment 1. The internal space 400 of the tent 100 is jointly defined by the top frame 200 and the support legs 300. The space directly below the top frame 200 is the internal space 400 of the tent 100. The top frame 200 includes a plurality of foldable top rod units 201, and the plurality of top rod units 201 are connected to a central lock 5 located at the top of the center of the tent 100; the number of top rod units 201 corresponds to the number of support legs 300, and the outer end of each top rod unit 201 is connected to the upper part of a corresponding support leg 300. The top frame 200 further includes a plurality of outer telescopic units 202, and an outer telescopic unit 202 is connected to the upper parts of every two adjacent support legs 300. The outer telescopic unit 202 can be folded and unfolded laterally, so that the support legs 300 move away from each other during the unfolding process and move closer to each other during the folding process. For example, the outer telescopic unit 202 is composed of a plurality of cross-shaped link assemblies hinged in sequence, and each cross-shaped link assembly includes two links 301 hinged to each other in the middle. Among the cross-shaped link assemblies connected to the support legs 300, one end of the upper link 301 is hinged to the upper end of the support leg 300, and one end of the lower link 301 is hinged to a sliding sleeve 302 on the support leg 300; when folding or opening, the sliding sleeve 302 can slide up and down on the support leg 300, and the outer telescopic unit 202 is relatively unfolded or folded.

[0085] Each top rod unit 201 includes an inner top rod 1 and an outer top rod 2 that can be flipped relative to each other. The inner top rods 1 of the respective top rod units 201 are rotationally connected through the central lock 5, and the outer end of the outer top rod 2 is hinged to the upper end of the support leg 300. In the embodiment shown in the drawing, the outer end of the inner top rod 1 and the inner end of the outer top rod 2 of each top rod unit 201 are directly pivotally connected to each other. The inner end of the inner top rod 1 is pivotally connected to the central lock 5, and the outer end of the outer top rod 2 is pivotally connected to the upper end of the support leg 300.

[0086] Combined with Figures 16 to 23As shown, the central lock 5 includes a connecting member for connecting to the top pole unit of the tent. The connecting member specifically includes a top cap 51 and a bottom cap 52 that moves up and down relative to the top cap 51. The top cap 51 is located above the bottom cap 52. The inner top pole 1 of each top pole unit 201 is rotatably connected to the top cap 51. Each top pole unit 201 further includes an inclined pole 3. The outer end of the inclined pole 3 is rotatably connected to the inner top pole 1, and the inner ends of the inclined poles 3 are respectively rotatably connected to the bottom cap 52. The first elastic member 4 is in contact with the bottom cap 52. In the example shown in the drawings, the first elastic member 4 is disposed between the top cap 51 and the bottom cap 52, and the first elastic member 4 is in its original state, that is, not deformed. When the tent 100 is in the unfolded state, there is a first distance between the top cap 51 and the bottom cap 52. When the tent 100 is in the folded state, there is a second distance between the top cap 51 and the bottom cap 52. The first elastic member 4 is in a compressed state, and the first distance is greater than the second distance.

[0087] The opening drive member is provided on the central rod 53 of the central lock 5. The central rod 53 is fixedly connected to or integral with the top cap 51, and the central rod 53 extends vertically downward from the top cap 51. The bottom cap 52 is slidably provided on the central rod 53. The first elastic member 4 is a compression spring sleeved on the central rod 53, with its upper end resting on the top cap 51 and its lower end abutting against the bottom cap 52. When the tent 100 is folded, the bottom cap 52 moves upward, that is, approaches the top cap 51, and the distance between the two becomes shorter, and the compression spring is compressed. When the tent 100 is unfolded, after the user rotates the outer top pole 2 until the elastic restoring force of the compression spring is sufficient to overcome the constraint of the self-weight of the pole, the compression spring pushes the bottom cap 52 to move away from the top cap 51, and the distance between the two becomes larger, causing the inner end of the inner top pole 1 to move upward relative to the bottom cap 52, and the inner top pole 1 to flip upward and open.

[0088] During the process of the tent 100 being converted from the unfolded state to the folded state, the central lock 5 is unlocked and placed in a holding state. Subsequently, outside the internal space 400, the outer top pole 2 or the opening drive member is operated to convert the central lock 5 to the unlocked state, and the top pole units 201 move closer to each other. Specifically, when the tent 100 is in the unfolded state, the central lock 5 is in the locked state. When the tent 100 is in the folded state, the central lock 5 is in the unlocked state. During the folding process of the tent 100, the central lock 5 also has a holding state between the locked state and the unlocked state. In this holding state, the tent 100 can still be maintained in the unfolded state, but applying a small force to the poles of the tent 100 can cause the tent 100 to fold under its own weight (such as shaking or rotating one of the outer top poles 2), and the central lock 5 is converted to the unlocked state.

[0089] The central lock 5 further includes a locking assembly movably disposed on the central rod 53. When the central lock 5 is in the locked state, the locking assembly and the bottom cap 52 are locked to each other to provide a first locking force for stably maintaining the tent 100 in the deployed state. When the central lock 5 is in the unlocked state, the locking assembly and the bottom cap 52 are disengaged. When the central lock 5 is in the holding state, the locking assembly and the bottom cap 52 are in contact or locked to each other to provide a second locking force smaller than the first locking force, so as to keep the tent 100 in the deployed state and allow the user to disengage the locking assembly from the bottom cap 52 when operating the outer top rod 2 outside the internal space 400, so that the central lock 5 is changed from the holding state to the unlocked state.

[0090] The central lock 5 further includes a lock base 532 disposed on the central rod 53 and below the bottom cap 52. The above-mentioned locking assembly includes a rotary lock 55 pivotally connected to the lock base 532 or the central rod 53 through a pivot 550. The rotary lock 55 has a first locking hook 551 and a second locking hook 552. The first locking hook 551 and the second locking hook 552 are respectively located on opposite sides of the pivot 550, forming a structure similar to a lever or a seesaw. The axis line of the pivot 550 extends horizontally, and the first locking hook 551 and the second locking hook 552 are respectively located on opposite sides of the central rod 53. When the central lock 5 is in the locked state, the first locking hook 551 and the bottom cap 52 are locked to each other and have a first locking surface 551a in contact and cooperation. At this time, there is a first included angle between the first locking surface 551a and the horizontal plane. When the central lock 5 is in the holding state, the first locking hook 551 disengages from the bottom cap 52, and the second locking hook 552 and an unlocking lock 56 provided on the bottom cap 52 are locked to each other and have a second locking surface 552a in contact and cooperation. At this time, there is a second included angle between the second locking surface 552a and the horizontal. As Figure 23 shown, the second included angle is greater than the first included angle and less than 90 degrees. Further, the first included angle is 0 to 10°, and the second included angle is 45 to 85°. The smaller the included angle is, the greater the locking force with the bottom cap 52 or the unlocking lock 56 is. The closer the second included angle approaches 90°, the easier it is for the second locking hook 552 to disengage from the unlocking lock 56.

[0091] The rotary lock 55 is an integral part pivotally connected to the lock base 532. A first lock hole 525 recessed inward is provided on the outer surface of the bottom cap 52. When in the locked state, the first locking hook 551 is inserted into the first lock hole 525, and the first locking surface 551a of the first locking hook 551 abuts against the bottom groove wall of the first lock hole 525. The first locking surface 551a is disposed downward and approximately horizontally to obtain a greater first locking force.

[0092] The top of the first locking hook 551 also has a top inclined surface 551b that faces and inclines inward, and the bottom of the bottom cap 52 has a cooperating bottom inclined surface 526. When the central lock 5 is in the unlocked state, the top inclined surface 551b of the first locking hook 551 is directly below a bottom inclined surface 526 of the bottom cap 52. Further, the central lock 5 further includes a fourth elastic member 57, and the fourth elastic member 57 is disposed between the unlocking latch 56 and the lock seat 532 or the central rod 53 to keep the rotating latch 55 in the initial position when the central lock 5 is in the unlocked state. In this initial position, the top inclined surface 551b of the first locking hook 551 is directly below a bottom inclined surface 526 of the bottom cap 52, so as to push the first locking hook 551 outward when the top inclined surface 551b and the bottom inclined surface 526 slide relative to each other, and at this time the fourth elastic member 57 is deformed; until the first locking surface 551a of the first locking hook 551 is located at a position substantially level with the first locking hole 525, the fourth elastic member 57 is released, and its elastic force drives the first locking hook 551 to move inward so as to insert into the first locking hole 525 to achieve locking. In the example shown in the drawings, the fourth elastic member 57 is a torsion spring; in some other embodiments, the fourth elastic member 57 can also be other forms of springs such as a compression spring or a tension spring, which are not limited herein.

[0093] The unlocking latch 56 is vertically telescopically disposed in the bottom cap 52. Specifically, a latch cover 562 is provided on the bottom cap 52, a cavity is formed between the latch cover 562 and the bottom cap 52, the unlocking latch 56 is inserted into the cavity, and an unlocking spring 57 for enabling the lower end portion of the unlocking latch 56 to extend out of the cavity is disposed between the unlocking latch 56 and the inner wall of the cavity. An outwardly recessed second locking hole 561 is provided on the lower portion of the unlocking latch 56, and the second locking hole 561 faces the outer surface of the central rod 53. In the holding state, the second locking hook 552 is inserted into the second locking hole 561. The second locking surface 552a of the second locking hook 552 faces outward and downward, and it contacts the inclined bottom wall of the second locking hole 561 to provide a relatively small second locking force. Under the action of a relatively small external force, the second locking surface 552a will disengage from the second locking hole 561, and the second locking hook 552 and the unlocking latch 56 will disengage from each other to achieve unlocking.

[0094] The following will be combined with Figures 15 to 23 to describe in detail the method for deploying or folding the tent 100 of this embodiment.

[0095] The tent 100 is composed of Figure 15When converting from the shown unfolded state to the folded state, the central lock 5 is initially in the locked state. At this time, the user enters the tent 100 and rotates the rotary lock catch 55 to rotate the first lock hook 551 outwardly away from the bottom cap 52 (the first lock hole 525). At the same time, the second lock hook 552 is inserted into the second lock hole 561 of the unlocking lock catch 56. The central lock 5 is converted to the holding state, and a relatively small second locking force is provided through the second locking surface (bevel surface) of the second lock catch to keep the tent 100 in the unfolded state. The user can move outside the tent 100 at this time. Then, the user rotates the outer ejector rod 2 downward, the inner ejector rod 1 and the outer ejector rod 2 flip downward, and the bottom cap 52 moves upward. Under the action of the inclined second locking surface, the second lock catch disengages from the second lock hole 561. The central lock 5 is converted to the unlocked state, and each ejector rod unit 201 moves closer to each other, and each support leg 300 moves closer to each other, and the tent 100 is converted to the folded state.

[0096] When the tent 100 is converted from the folded state to Figure 15 the shown unfolded state, the central lock 5 is initially in the unlocked state. At this time, under the reset of the fourth elastic member 57, the first lock hook 551 is located directly below the bottom cap 52, and the top inclined surface 551b of the first lock hook 551 faces the bottom inclined surface 526 of the bottom cap 52. The user pulls the outer ejector rod 2 upward outside the tent 100, and the outer end of the inner ejector rod 1 moves upward accordingly. The first elastic member 4 is released, and its elastic force is sufficient to overcome the self-weight of the rod member, and then it pushes the bottom cap 52 away from the top cap 51, and the diagonal rod 3 flips to open each ejector rod unit 201. During the movement of the bottom cap 52, the bottom cap 52 and the lock seat 532 / rotary lock catch 55 gradually approach. The bottom inclined surface 526 of the bottom cap 52 contacts the top inclined surface 551b of the first lock hook 551 and pushes the first lock hook 551 outward, and the fourth elastic member 57 deforms. When the first locking surface 551a is flush with the first lock hole 525, the fourth elastic member 57 is released, and its elastic force pushes the first lock hook 551 inward to insert into the first lock hole 525, and the first locking surface 551a contacts the bottom wall of the first lock hole 525 to achieve complete locking, and the central lock 5 is automatically converted to the locked state to lock the tent 100 in the unfolded state.

[0097] The above-mentioned tent 100 has the following advantages: During the opening process of the tent 100, the user can operate outside the tent 100, avoiding the situation of entering the tent 100 for operation when the tent 100 is not fully opened. Moreover, the tent 100 can be automatically locked after it is opened; during the folding process of the tent 100, after the user unlocks the central lock 5, the central lock 5 is in a holding state, and the tent 100 remains in the unfolded state for the user to move outside the tent 100, and then the user operates outside the tent 100 to fully fold the tent 100, and the central lock 5 automatically changes from the holding state to the unlocked state. During the unfolding or folding process of the tent 100, it avoids the situation that the user bends down to enter and exit the tent 100 when the tent is not fully and stably opened, which is convenient and safe to use and provides a good experience.

[0098] Unless otherwise specified, the rotational connection and hinge in the above-mentioned embodiments refer to pivot connection.

[0099] As shown in this specification and the claims, the terms "comprising" and "including" only imply including the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0100] It can be further understood that in the present disclosure, "a plurality of" means two or more, and other quantifiers are similar.

[0101] It can be further understood that the terms "first", "second", etc. are used to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other, and do not represent a specific order or importance. In fact, the expressions such as "first" and "second" can be used interchangeably. For example, without departing from the scope of the present disclosure, the first information can also be called the second information, and similarly, the second information can also be called the first information.

[0102] The above-mentioned embodiments are only for illustrating the technical concept and characteristics of the present invention, and are a preferred embodiment. The purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly, and it cannot be used to limit the protection scope of the present invention.

Claims

1. A center lock for locking a shielding product in an unfolded state, characterized in that: The central lock comprises: A connecting piece, which is used to connect the rod of the shielding product, the connecting piece includes a top cap and a bottom cap located below the top cap, and the top cap and the bottom cap are arranged to be relatively movable up and down; a center rod disposed between the top cap and the bottom cap; A locking assembly, which is disposed between the central rod and the connecting member; Wherein, the central lock has a locked state, an unlocked state and a holding state between the locked state and the unlocked state; When the center lock is in a locked state, the locking assembly is locked so that the bottom cap, the center rod and the top cap are fixedly connected, and the locking assembly provides a first locking force that keeps the shielding product stable in the unfolded state; When the center lock is in the holding state, the locking assembly locks and fixedly connects the bottom cap, the center rod and the top cap with a second locking force, wherein the second locking force is smaller than the first locking force, so as to allow the center lock to be switched to the unlocking state outside the shielding product; When the center lock is in the unlocked state, the locking assembly is unlocked to allow the top cap and the bottom cap to move relative to each other.

2. The center lock according to claim 1, characterized in that: The locking assembly is movably arranged on the center rod. In the locked state, the locking assembly and the bottom cap are locked with each other. In the holding state, the locking assembly and the bottom cap are locked or contacted. In the unlocked state, the locking assembly and the bottom cap are separated from each other.

3. The center lock according to claim 1, characterized in that: When the center lock is in a locked state, the top cap and the bottom cap have a first distance, and when the center lock is in an unlocked state, the top cap and the bottom cap have a second distance, and the first distance is greater than the second distance; a first elastic member is provided between the top cap and the bottom cap to provide assistance for the top cap and the bottom cap to move away from each other.

4. The center lock according to any one of claims 1 to 3, characterized in that: The locking assembly includes a handle movably mounted on the center rod, the handle can be rotated relative to the bottom cap and moved up and down; a locking protrusion is provided on the handle, and a locking groove is provided on the bottom cap, and the center lock is in a locked state when the locking protrusion is located in the locking groove; a limiting groove is also provided on the bottom cap, and the limiting groove is located below the locking groove and is connected to each other through a sliding groove, the limiting groove has an upper groove wall and an open bottom, and the center lock is in a retained state after the locking protrusion enters the limiting groove, at which time the locking protrusion abuts against the upper groove wall and can move from the bottom of the limiting groove to the bottom of the bottom cap under the action of external force.

5. The center lock according to claim 4, characterized in that: The center lock also includes a second elastic member, which is arranged between the handle and the limiting section on the center rod. In the holding state, the second elastic member is in a deformed state to prevent the locking protrusion from disengaging downward from the bottom of the limiting groove.

6. The center lock according to claim 4, characterized in that: The slide groove generally extends in the up-down direction, and the locking groove and the limiting groove extend laterally to the same side from the upper end and the lower end of the slide groove respectively; the locking groove has an open end and a closed end opposite to the open end, and the bottom cap also has a guiding inclined surface facing downward, and the guiding inclined surface extends downwardly from the open end of the locking groove. During the process of the center lock being converted into a locked state, the guiding inclined surface and the locking protrusion contact and enter the open end of the locking groove; the center lock also includes a third elastic member, and the third elastic member is arranged between the handle and the center rod to provide an elastic force to rotate the handle so that the locking protrusion moves to the closed end of the locking groove.

7. The center lock according to any one of claims 1 to 3, characterized in that: The center lock also includes a lock seat arranged on the center rod and located below the bottom cap, and the locking assembly includes a rotating lock buckle connected to the lock seat or the center rod through a pivot, and the rotating lock buckle has a first lock hook and a second lock hook, and the first lock hook and the second lock hook are respectively located on opposite sides of the pivot; when the center lock is in a locked state, the first lock hook and the bottom cap are mutually locked and have first locking surfaces that contact and cooperate with each other, and at this time, a first angle is formed between the first locking surface and the horizontal plane; when the center lock is in a held state, the first lock hook is disengaged from the bottom cap, and the second lock hook and the unlocking lock buckle arranged on the bottom cap are mutually locked and have a second locking surface that contacts and cooperates, and the second locking surface is an inclined surface, and at this time, a second angle is formed between the second locking surface and the horizontal, and the second angle is greater than the first angle and less than 90 degrees.

8. The center lock according to claim 7, characterized in that: The center lock further comprises a fourth elastic member, which is arranged between the unlocking lock catch and the lock seat or the center rod, so as to keep the rotating lock catch in an initial position and drive the first locking surface to contact and cooperate with the bottom cap when the center lock is in an unlocking state; In the initial position, the top slope of the first locking hook is located directly below a bottom slope of the bottom cap, so that when the top slope and the bottom slope slide relative to each other, the first locking hook is pushed outward to deform the fourth elastic member.

9. The center lock according to claim 7, characterized in that: A first locking hole recessed inwardly is provided on the outer surface of the bottom cap, and in the locked state, the first locking hook is inserted into the first locking hole, and the first locking surface is in close contact with the bottom groove wall of the first locking hole; the unlocking lock buckle can be telescopically arranged in the bottom cap up and down; a second locking hole recessed outwardly is provided at the lower part of the unlocking lock buckle, and the second locking hole and the outer side surface of the center rod are opposite to each other, and in the holding state, the second locking hook is inserted into the second locking hole, and the inclined bottom of the second locking hook and the second locking hole are in contact with each other to provide the second locking force; the first angle is 0-10°, and the second angle is 45-85°.

10. A tent having an unfolded state and a folded state, the tent comprising a top frame and a plurality of supporting legs extending up and down, the top frame being supported by the plurality of supporting legs, the area between the top frame and the plurality of supporting legs being an internal space; the top frame comprising a plurality of top rod units, each of the top rod units comprising an inner top rod, an outer top rod and an inclined rod capable of being relatively flipped, the outer end of the inclined rod being rotatably connected to the inner top rod; characterized in that The tent also includes a central lock as described in any one of claims 1 to 9, and each of the top rod units is rotatably connected via the central lock, wherein the inner end of each inner top rod is rotatably connected to the top cap, and the inner end of each diagonal rod is rotatably connected to the bottom cap; when the tent is converted from an unfolded state to a folded state, the central lock is unlocked and kept in a holding state, and then the top rod unit is operated outside the internal space to convert the central lock to an unlocked state, and each of the top rod units is folded close to each other.

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