Novel teapot

Abstract

The utility model discloses a novel teapot which comprises a teapot body, a filter box and an adjusting piece, and the teapot body is provided with a water storage cavity. A detachable kettle cover is arranged on the kettle body; a first locking part is arranged on the kettle cover; the filter cartridge is mounted in the water storage cavity; the adjusting part comprises a driving rod and a linkage rod, one end of the driving rod penetrates through the kettle cover and extends to the outside, and the driving rod rotates under stress so as to drive the linkage rod to move up and down in the axial direction of the kettle body, so that the filtering box moves up and down in the axial direction of the kettle body; the driving rod is provided with a second locking part, and the second locking part is matched with the first locking part in a locking mode when the driving rod rotates so as to lock or unlock the driving rod. When the filter box needs to be taken out of water, only the driving rod needs to be rotated to enable the linkage rod to move upwards in the height direction of the kettle body so that the filter box can be taken out of the water, the taste of tea can be guaranteed, then the second locking part and the first locking part can be locked so that the filter box can be locked, and the filter box can be prevented from falling down due to tea leaves in the filter box and the gravity of the filter box.

Description

Technical Field

[0001] The utility model relates to the technical field of teapots, in particular to a new type of teapot. Background Art

[0002] A teapot usually comprises a teapot body and a filter box. When the teapot is in use, the tea leaves need to be taken out of the water after soaking for a period of time so that they are no longer soaked in water, as the taste of the tea leaves will be affected after soaking for a long time. However, if the filter box is taken out directly by hand, it is easy to burn the operator, which is unsafe and inconvenient to operate. Although some filter boxes on the market can be moved out of the water through adjusting parts such as rods or ropes, the adjusting parts are easy to fall into the water again due to their own weight, resulting in the phenomenon of breaking the teapot body. As a result, the user needs to use external force to fix the adjusting parts when changing the water, which is extremely inconvenient. Utility Model Content

[0003] In order to overcome at least one of the defects of the above-mentioned prior art, the present invention provides a new teapot, which can remove the filter box in real time through an adjustment member, and then lock the adjustment member so that the filter box can be locked in a user-specified position, which is easy to operate.

[0004] The technical solution adopted by the present invention to solve the problem is:

[0005] A new teapot, comprising:

[0006] A kettle body, the kettle body having a water storage cavity; a detachable kettle lid is provided on the kettle body, the kettle lid is used to cover the water storage cavity; the kettle lid is provided with a first locking portion;

[0007] A filter box, the filter box is installed in the water storage cavity;

[0008] An adjusting member, the adjusting member includes a driving rod and a linkage rod, one end of the driving rod extends through the pot lid to the outside, the other end of the driving rod is connected to the linkage rod, and the other end of the linkage rod is connected to the filter box; the driving rod is used to rotate when subjected to force to drive the linkage rod to move up and down along the axial direction of the pot body, so that the filter box moves up and down along the axial direction of the pot body; a second locking portion is provided on the driving rod, and the second locking portion is used to lock and cooperate with the first locking portion when the driving rod rotates to lock or unlock the driving rod.

[0009] Furthermore, a snap-fit strip is provided on the pot cover, the snap-fit strip is the first locking portion, a snap-fit hole is provided on the driving rod, the snap-fit hole is the second locking portion, and the snap-fit strip is used to snap into or out of the snap-fit hole when the driving rod rotates.

[0010] Further, a first through hole is provided on the kettle lid, and one end of the driving rod is movably inserted into the first through hole.

[0011] Further, a connecting column is provided on the kettle lid, and a second through hole is provided in the connecting column. The first through hole and the second through hole are correspondingly arranged. The driving rod sequentially passes through the first through hole and the second through hole and extends to the outside, and the clamping strip is arranged on the connecting column.

[0012] Further, there are at least two clamping strips. The at least two clamping strips are oppositely arranged and are spaced apart on both sides of the connecting column; the at least two clamping strips are used for clamping into the clamping hole when the driving rod rotates to correspond to the clamping hole.

[0013] Further, the driving rod includes at least two connecting rods hinged to each other. The at least two connecting rods are used for rotating when stressed and bending or unfolding along the radial direction of the kettle body, so as to drive the linkage rod to move up and down along the axial direction of the kettle body; the first locking portion is arranged on one of the connecting rods extending to the outside.

[0014] Further, the adjusting member further includes a handle. The handle is connected to the end of the driving rod away from the kettle body and abuts against the kettle lid. The handle is used for guiding the driving rod to bend along the radial direction of the kettle body when stressed.

[0015] Further, a groove is provided at the bottom of the handle. The first locking portion is located in the groove when the handle abuts against the kettle lid.

[0016] Further, the filter box includes a box body and a box lid. A plurality of filter holes are provided on the box body. The box lid covers the box body and is connected to the linkage rod; a raised strip is provided on the box body. The raised strip extends along the circumferential direction of the box body. A connecting groove is provided at the bottom of the box lid. The raised strip is used for extending into the connecting groove and abutting against the inner wall of the connecting groove when the box lid covers the box body.

[0017] Further, a limiting block is further provided on the box body. The limiting block protrudes from the inner wall of the connecting groove and is used for abutting against the bottom of the raised strip when the raised strip abuts against the inner wall of the connecting groove, so as to lock the raised strip; at least one of the limiting block and the raised strip has a guiding arc surface, and the guiding arc surface is used for guiding the raised strip to abut against the inner wall of the connecting groove.

[0018] In summary, a new type of teapot provided by the present utility model has the following technical effects: when in use, when it is necessary to take out the filter box from the water, only need to rotate the driving rod to make the linkage rod move upward along the height direction of the teapot body, so as to drive the filter box connected to the linkage rod to be taken out from the water, ensuring the taste of the tea;

[0019] In addition, since the second locking portion on the driving rod and the first locking portion on the teapot lid can be locked and matched, after the filter box is taken out of the water, the second locking portion and the first locking portion can be locked to lock the driving rod, so as to lock the filter box, avoiding the filter box from falling due to the gravity of the internal tea leaves and its own weight and falling into the water again to affect the taste of the tea, or the filter box falling and hitting the teapot body, resulting in damage to the teapot body and affecting the use. While the operation is convenient, the use is also safer. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the present utility model;

[0021] Figure 2 is a cross-sectional view of the present utility model;

[0022] Figure 3 is Figure 2 an enlarged structural view of A in

[0023] Figure 4 is a schematic structural diagram of another state of the adjusting member in the present utility model;

[0024] Among them, the meanings of the reference numerals are as follows:

[0025] 10. Teapot body; 11. Water storage cavity; 12. Teapot lid; 121. First locking portion; 122. Connecting column; 13. Handle; 20. Adjusting member; 21. Driving rod; 22. Linkage rod; 221. Second locking portion; 23. Handle; 30. Filter box; 31. Box body; 311. Raised strip; 32. Box lid; 321. Limiting block; 3211. Guiding arc surface. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] For better understanding and implementation, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

[0027] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this utility model belongs. The terms used in the specification of this utility model herein are only for the purpose of describing specific embodiments and are not intended to limit this utility model.

[0029] Referring to Figures 1 to 4 , this utility model discloses a new type of teapot, including: a pot body 10, a filter box 30 and an adjusting member 20. The pot body 10 has a water storage cavity 11, and the filter box 30 is installed in the water storage cavity 11; a detachable pot lid 12 is provided on the pot body 10, and the pot lid 12 is used to cover the water storage cavity 11. A first locking portion 121 is further provided on the pot lid 12. Specifically, the adjusting member 20 includes a driving rod 21 and a linkage rod 22. One end of the driving rod 21 passes through the pot lid 12 and extends to the outside, and the other end of the driving rod 21 is connected to the linkage rod 22. The other end of the linkage rod 22 is connected to the filter box 30. When the driving rod 21 is stressed, it rotates to drive the linkage rod 22 to move up and down along the axial direction of the pot body 10, thereby driving the filter box 30 to move up and down along the axial direction of the pot body 10; a second locking portion 221 is provided on the driving rod 21, and the second locking portion 221 is locked and cooperated with the first locking portion 121 when the driving rod 21 rotates to lock or unlock the driving rod 21.

[0030] On the basis of the above structure, when the teapot is in the initial state, the driving rod 21 is movably inserted into the pot lid 12, and the end of the driving rod 21 away from the linkage rod 22 abuts against the end face of the pot lid 12. In this way, the end of the driving rod 21 outside the water storage cavity 11 will not slide down, so that the filter box 30 can be stably suspended in the water storage cavity 11, and the end of the driving rod 21 located outside the water storage cavity 11 can be held by the user, so that the user can apply an external force to the driving rod 21 outside.

[0031] When specifically used, put the tea leaves into the filter box 30, and then the filter box 30 extends into the pot body 10 through the linkage rod 22 and the driving rod 21 until it is completely immersed in the water, so that the tea leaves can fully react with the water. When the tea leaves need to be taken out of the water after soaking for an appropriate time, at this time, the user can apply an external force to the driving rod 21 outside to drive the linkage rod 22 to move upward along the axial direction of the pot body 10 (that is, the height direction of the pot body 10), so as to drive the filter box 30 to move upward along the axial direction of the pot body 10 until the filter box 30 is higher than the water surface, ensuring the taste of the tea and improving the customer experience.

[0032] More specifically, after the tea leaves in the filter box 30 are soaked, the weight of the filter box 30 itself will increase. When the driving rod 21 takes it out of the water, the filter box 30 may fall due to its increased weight and hit the kettle body, resulting in damage to the kettle body. Therefore, the user still needs to use external force to fix the driving rod 21 to ensure that the filter box 30 will not fall. Thus, in this embodiment, by providing a first locking portion 121 on the kettle lid 12 and a second locking portion 221 on the driving rod 21, after the filter box 30 is taken out of the water, the second locking portion 221 is locked with the first locking portion 121 to lock the driving rod 21 and lock the filter box 30, preventing the filter box 30 from falling due to the gravity of the internal tea leaves and itself and hitting the kettle body, affecting the use of the kettle body, or the filter box falling into the water again, resulting in an overly strong tea flavor and affecting the taste. The structure is practical and the operation is more convenient.

[0033] In addition, when the driving rod 21 is driven by an external force to drive the linkage rod 22 to move upward, if the driving rod 21 is not locked, the driving rod 21 may also slide around the kettle body to the water outlet and block the water outlet, affecting the user's pouring of water. Therefore, in this embodiment, by locking and cooperating the second locking portion with the first locking portion, the driving rod 21 can be locked after driving the linkage rod 22 to move upward to a specified position, avoiding problems such as the driving rod 21 sliding, affecting the user's pouring of water or damaging the kettle body, and the structure is more practical.

[0034] Similarly, when the user believes that the tea flavor in the kettle has become weak, unlock the second locking portion 221 and the first locking portion 121. At this time, apply an external force to the driving rod 21 again externally, so that the driving rod 21 drives the linkage rod 22 to move downward along the axis of the kettle body 10, driving the filter box 30 to move downward along the axis of the kettle body 10 until it is immersed in the tea water.

[0035] It should be noted that the first locking portion 121 can be a connecting structure such as a columnar or strip-shaped structure, and the second locking portion 221 is a groove or hole structure formed on the driving rod 21 for passing through the first locking portion 121 to make the two lock and cooperate; of course, the first locking portion 121 can also be a groove or hole structure formed on the kettle lid 12, and the second locking portion 221 is a columnar or strip-shaped connecting structure provided on the driving rod 21, which can also achieve the above functions, and can be designed according to actual needs.

[0036] In addition, during assembly, a bracket can be provided on the outer periphery of the kettle body 10, and then the driving rod 21 is placed transversely along the radial direction (i.e., the width direction) of the kettle body 10, wherein one end located outside the water storage chamber 11 is rotatably mounted on the bracket via a connecting shaft or rod, and the structure of the connecting shaft or rod is formed into a lever, so that the driving rod 21 is formed into a seesaw structure. In this way, when the driving rod 21 is pressed, the driving rod 21 can move up and down along the axial direction (height direction) of the kettle body 10, and at this time, it synchronously drives the linkage shaft connected to the other end to move up and down along the axial direction of the kettle body 10;

[0037] Of course, the driving rod 21 and the linkage rod 22 can also be rotatably connected by a lever or a rotating shaft, so that the driving rod 21 can be bent or reset and unfolded in the radial direction of the kettle body 10 when subjected to force. When it is in a bent state, the linkage shaft moves upward along the axial direction of the kettle body 10. When it is reset and unfolded, the linkage shaft also resets and moves downward along the axial direction of the kettle body 10.

[0038] Preferably, the driving rod 21 and the linkage rod 22 in this embodiment are hinged via a rotating shaft, so that the driving rod 21 can bend or reset in the radial direction of the kettle body 10 when subjected to force, making the assembly structure simpler.

[0039] In addition, the filter box 30 can be formed by a box body 31 with a filter mesh or filter holes, so that tea leaves can react with water after being placed in the filter box 30.

[0040] Preferably, the first locking portion 121 in this embodiment is a snap-fit strip provided on the pot lid 12, and the second locking portion 221 is a snap-fit hole provided on the driving rod 21, and the snap-fit strip is engaged with or disengaged from the snap-fit hole when the driving rod 21 rotates.

[0041] It should be noted that if a snap-in hole is provided on the pot lid 12, external dust or impurities may enter the water storage chamber 11 through the snap-in hole and contaminate the water in the water storage chamber 11. Therefore, in this embodiment, a snap-in strip is provided on the pot lid 12 to engage with the snap-in hole on the drive rod 21 to achieve a locking fit, so as to avoid the water in the water storage chamber 11 being contaminated due to the snap-in hole provided on the pot lid 12, and the structure is more practical.

[0042] Furthermore, a first through hole is provided on the pot cover 12 . During assembly, one end of the driving rod 21 is movably inserted into the first through hole so that the driving rod 21 can extend into or out of the water storage chamber 11 through the first through hole.

[0043] In addition, a connecting column 122 is provided on the pot lid 12, and a second through-hole is provided on the connecting column 122. The first through-hole and the second through-hole are arranged correspondingly. During assembly, the snap-fit strip is arranged on the connecting column 122, and the driving rod 21 passes through the first through-hole and the second through-hole in sequence and extends to the outside.

[0044] Specifically, through the arrangement of the connecting column 122, the connection between the clamping strip and the kettle lid 12 is more stable. As a support point, the connecting column 122 can bear greater tensile force, making the driving rod 21 not easy to loosen or fall off in the locked state, and the structure is more stable.

[0045] Furthermore, there are at least two clamping strips in this embodiment. During assembly, at least two clamping strips are arranged oppositely, spaced on both sides of the connecting column 122, and when the driving rod 21 rotates to correspond to the clamping hole, at least two clamping strips are clamped into the clamping hole.

[0046] On the basis of this structure, when in use, when the user needs to take out the filter box 30 from the water and applies an external force to the driving rod 21, since there are at least two clamping strips and they are arranged oppositely and spaced apart, in this way, the user can lock the driving rod 21 through the clamping strips from both the left and right sides of the kettle lid 12, so that the user is no longer limited to one side when applying force, and the operation is more convenient.

[0047] It should be noted that the number of clamping strips can be set to three, four or more according to actual needs, so that the customer can lock the driving rod 21 from multiple angles, which is convenient for the user to operate.

[0048] Furthermore, the driving rod 21 includes at least two connecting rods hinged to each other. When the at least two connecting rods are stressed, they rotate and bend or unfold along the radial direction of the kettle body 10 to drive the linkage rod 22 to move up and down along the axial direction of the kettle body 10, and the first locking portion 121 is arranged on one of the connecting rods extending to the outside.

[0049] Specifically, in this embodiment, the driving rod 21 is composed of at least two connecting rods hinged to each other (such as hinged through a rotating shaft or a hinge) so that the two connecting rods are rotatably connected, making the entire driving rod 21 can be in a bent or unfolded state during rotation. During assembly, one of the connecting rods is located in the water storage cavity 11 and is connected to the linkage rod 22, and one end of the other connecting rod extends into the water storage cavity 11 and is rotatably connected to the connecting rod for connecting the linkage rod 22, while the other end extends to the outside. When the user applies an external force to it outside, it can rotate and bend along the radial direction of the kettle body 10 when stressed. When it is bent, it can drive the connecting rod for connecting the linkage rod 22 to move upward along the radial direction of the kettle body 10 to drive the filter box 30 to move upward along the axial direction of the kettle body 10; similarly, when the filter box 30 needs to be reset, an external force is applied again to make it in an unfolded state, and at this time the filter box 30 is also reset and moves back to the original position, and the entire structure is simply assembled.

[0050] Preferably, the specific number of connecting rods can be set according to the height of the kettle body 10 or according to the various heights that need to be adjusted to the filter box 30, and can specifically be two, three or more.

[0051] In addition, in order to facilitate the operator user to apply external force, the adjustment member 20 also includes a handle 23. During assembly, the handle 23 is connected to the end of the drive rod 21 away from the kettle body 10. In this way, the user can hold the handle 23 to apply external force to the drive rod 21. The handle 23 increases the gripping area of the drive rod 21, which is convenient for operation. Moreover, due to the presence of the handle 23, when the filter box 30 is in the initial state, the handle 23 abuts against the outer periphery of the kettle cover 12, so that the drive rod 21 can be fixed after sliding down to the limit, and the linkage rod 22 connected to the drive rod 21 no longer falls after being extended into the water storage chamber 11, so that the filter box 30 can be suspended in the water and no longer sinks, and the structure is more practical.

[0052] More specifically, a groove is provided at the bottom of the handle 23, and the first locking portion 121 is located in the groove when the handle 23 abuts against the pot lid 12. In this way, due to the presence of the groove at the bottom of the handle 23, when the driving rod 21 is in the initial state, the handle 23 can be covered on the outer periphery of the first locking portion 121, making the exterior of the pot body 10 look simpler.

[0053] Furthermore, the above-mentioned filter box 30 includes a box body 31 and a box cover 32. By setting a plurality of filter holes on the box body 31, and then sealing the box cover 32 on the box body 31 and connecting it with the linkage rod 22, after the tea leaves are placed in the box body 31, the water in the pot body 10 can enter the box body 31 through the plurality of filter holes and fully react with the tea leaves.

[0054] In addition, a raised strip 311 is provided on the box body 31, and the raised strip 311 is extended along the circumference of the box body 31, and a connecting groove is provided at the bottom of the box cover 32. When in use, tea leaves can be placed in the box body 31 and then the box cover 32 is sealed on the top of the box body 31. At this time, the raised strip 311 on the circumference of the box body 31 can extend into the connecting groove and abut against the inner wall of the connecting groove to lock the box cover 32 to prevent it from loosening.

[0055] More specifically, a limit block 321 is further provided on the box body 31, and the limit block 321 is protruded from the inner wall of the connecting groove. In this way, when the raised strip 311 abuts against the inner wall of the connecting groove, the limit block 321 can abut against the bottom of the raised strip 311 to support the raised strip 311, so as to lock the raised strip 311 and prevent the raised strip 311 from detaching from the connecting groove, so that the connection between the box cover 32 and the box body 31 is tightened and used to abut against the bottom of the raised strip 311 when the raised strip 311 abuts against the inner wall of the connecting groove.

[0056] It should be noted that the limiting block 321 can be arranged in an inclined plane or an arc surface, so that the convex strip 311 can slide over the limiting block 321 through the guidance of the inclined plane or the arc surface and slide into the connecting groove, so that the limiting block 321 is located at the bottom of the convex strip 311 and abuts against the convex strip 311. Also, the convex strip 311 can be smoothly guided by the arc surface or the inclined plane to slide into the connecting groove and abut against it. Of course, when the lid 32 needs to be detached from the box body 31, the user can apply an external force to the box body 31 or the lid 32. At this time, due to the guidance of the arc surface or the inclined plane on the limiting block 321, the convex strip 311 is more likely to slide over the limiting block 321 and detach from the connecting groove after being stressed. The whole connecting structure is simple and practical, and the lid 32 and the box body 31 can be quickly disassembled without the help of other connecting parts.

[0057] Preferably, in this embodiment, a guiding arc surface 3211 is provided on at least one of the limiting block 321 and the convex strip 311 to guide the convex strip 311 to cross the limiting block 321 and abut against the inner wall of the connecting groove through the guiding arc surface 3211, so that the convex strip 311 and the limiting block 321 slide closer to each other more smoothly.

[0058] Specifically, the guiding arc surface 3211 can be only provided on the limiting block 321, or only provided on the convex strip 311. Of course, the guiding arc surface 3211 can also be provided on both the limiting block 321 and the convex strip 311 at the same time.

[0059] The technical means disclosed in the solution of the present utility model are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present utility model.

Claims

1. A new type of teapot, characterized in that, Comprising: A kettle body having a water storage cavity; a detachable kettle lid is provided on the kettle body, and the kettle lid is used to seal the water storage cavity; A first locking portion is provided on the kettle lid; A filter box installed in the water storage cavity; An adjusting member including a driving rod and a linkage rod. One end of the driving rod extends through the kettle lid to the outside, the other end of the driving rod is connected to the linkage rod, and the other end of the linkage rod is connected to the filter box; the driving rod is used to rotate when a force is applied to drive the linkage rod to move up and down along the axial direction of the kettle body, so that the filter box moves up and down along the axial direction of the kettle body; a second locking portion is provided on the driving rod, and the second locking portion is used to lock and cooperate with the first locking portion when the driving rod rotates to lock or unlock the driving rod; The filter box includes a box body and a box lid. A plurality of filter holes are provided on the box body, and the box lid seals the box body and is connected to the linkage rod; a raised strip is provided on the box body, the raised strip extends along the circumferential direction of the box body, and a connecting groove is provided at the bottom of the box lid. The raised strip is used to extend into the connecting groove and abut against the inner wall of the connecting groove when the box lid seals the box body.

2. The novel teapot according to claim 1, wherein, A clamping strip is provided on the kettle lid, the clamping strip is the first locking portion, a clamping hole is provided on the driving rod, and the clamping hole is the second locking portion. The clamping strip is used to be clamped or disengaged from the clamping hole when the driving rod rotates.

3. The novel teapot according to claim 2, characterized in that, A first through hole is provided on the kettle lid, and one end of the driving rod is movably inserted into the first through hole.

4. The novel teapot according to claim 3, wherein, A connecting column is provided on the kettle lid, and a second through hole is provided on the connecting column. The first through hole and the second through hole are correspondingly arranged. The driving rod sequentially passes through the first through hole and the second through hole and extends to the outside, and the clamping strip is arranged on the connecting column.

5. The novel teapot according to claim 4, wherein At least two clamping strips are provided, and at least two clamping strips are oppositely arranged and are spaced apart on both sides of the connecting column; at least two clamping strips are used to be clamped into the clamping hole when the driving rod rotates to correspond to the clamping hole.

6. The novel teapot according to any one of claims 1-5, characterized in that, The driving rod includes at least two connecting rods hinged to each other. At least two connecting rods are used to rotate and bend or unfold along the radial direction of the kettle body when a force is applied to drive the linkage rod to move up and down along the axial direction of the kettle body; the first locking portion is provided on one of the connecting rods extending to the outside.

7. The novel teapot according to any one of claims 1-5, characterized in that, The adjusting member further includes a handle, the handle is connected to the end of the driving rod away from the kettle body and abuts against the kettle lid, and the handle is used to guide the driving rod to bend along the radial direction of the kettle body when a force is applied.

8. The novel teapot according to claim 7, characterized in that, A groove is provided at the bottom of the handle, and the first locking portion is located in the groove when the handle abuts against the kettle lid.

9. The novel teapot according to claim 1, characterized in that, The box body is further provided with a limiting block, which protrudes from the inner wall of the connecting groove and is used to abut against the bottom of the protruding strip when the protruding strip abuts against the inner wall of the connecting groove, so as to lock the protruding strip; at least one of the limiting block and the protruding strip has a guiding arc surface, and the guiding arc surface is used to guide the protruding strip to abut against the inner wall of the connecting groove.

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