Rack assembly and refrigeration equipment

Abstract

The invention discloses a rack assembly and refrigeration equipment. The rack assembly comprises a rack body and an adjusting assembly matched with the rack body. The adjusting assembly comprises a limiting piece matched with the rack body and a driving assembly used for driving the limiting piece to move in the transverse direction, the driving assembly comprises a pressing rod and a driving shaft arranged at one end of the pressing rod, the driving shaft penetrates through the two sides of a limiting block, the pressing rod drives the driving shaft to move, and the limiting block is arranged on the rack body. The driving shaft drives the limiting block to move; and small-range multi-stage adjustment of the rack body can be realized.

Description

Technical Field

[0001] The invention relates to the field of refrigeration, and in particular to a shelf assembly and a refrigeration device. Background Art

[0002] At present, refrigerators on the market are equipped with shelves and bottle holders on their cabinets and doors. In order to improve the utilization of space, most shelves and bottle holders can be adjusted in a large range, or can be disassembled to adjust the space, which can meet the user's needs for different spaces for placing items of different heights. However, it is impossible to adjust the height in a small range, and thus cannot meet the needs of more users.

[0003] In addition, most refrigerators on the market have door shelves that are simply hung on the door, and users can easily remove them. If there are fragile or heavy items in the shelves, children can easily remove them, or the shelves and the items in them may accidentally fall, causing injuries. Summary of the invention

[0004] One of the purposes of the present invention is to provide a shelf assembly to solve the technical problem in the prior art that the shelf body cannot be adjusted within a small range.

[0005] One of the objects of the present invention is to provide a refrigeration device.

[0006] To achieve one of the above-mentioned purposes of the invention, one embodiment of the present invention provides a shelf assembly, including a shelf body and an adjustment assembly arranged in cooperation with the shelf body; the adjustment assembly includes a limit piece arranged in cooperation with the shelf body and a driving assembly for driving the limit piece to move laterally, the driving assembly includes a pressing rod and a driving shaft arranged at one end of the pressing rod, the driving shaft passes through both sides of the limit block, the pressing rod drives the driving shaft to move, and the driving shaft drives the limit block to move.

[0007] As a further improvement of an embodiment of the present invention, the minimum single adjustment range of the shelf body along the height direction is 10-30 mm.

[0008] As a further improvement of one embodiment of the present invention, the limit block is provided with an inclined slide groove, and the drive shaft passes through the inclined slide groove and moves vertically along the inclined slide groove to drive the limit block to move horizontally.

[0009] As a further improvement of one embodiment of the present invention, the driving assembly includes a guide slide seat, the guide slide seat has a hollow receiving groove to accommodate the limit block, and the two side walls of the guide slide seat are provided with vertical grooves, and the two ends of the driving shaft pass through the vertical grooves and move vertically along the vertical grooves.

[0010] As a further improvement of one embodiment of the present invention, the guide slide seat is fixed to the side wall of the shelf body, the pressing rod includes a square rod and a cylindrical rod, the square rod is exposed upward to the side wall to form a pressing portion, the cylindrical rod extends from the lower surface of the square rod, the diameter of the cylindrical rod is smaller than the width of the square rod, and the driving assembly includes a spring sleeved on the cylindrical rod, one end of the spring abuts the square rod, and the other end abuts the guide slide seat.

[0011] As a further improvement of one embodiment of the present invention, a connecting block is provided at one end of the cylindrical rod facing away from the square rod, the connecting block is arranged in the limit block, the driving shaft passes through the connecting block, and the driving shaft passes through the connecting block, the limit block and the guide slide seat in sequence.

[0012] As a further improvement of one embodiment of the present invention, the limit block includes a main block and a protruding block located outside the main block, the main block is provided with a hollow activity space, the inclined slide groove is connected to the activity space, and the connecting block is arranged in the activity space.

[0013] As a further improvement of one embodiment of the present invention, the side wall of the shelf body is provided with a receiving space to accommodate the driving assembly, and the adjustment assembly includes a decorative cover, which covers the receiving space, and the outer surface of the decorative cover is flush with the outer surface of the side wall.

[0014] To achieve one of the above-mentioned purposes of the invention, one embodiment of the present invention provides a refrigeration device, comprising a shelf assembly as described in any of the above-mentioned technical solutions and a positioning groove arranged in cooperation with the shelf assembly.

[0015] As a further improvement of an embodiment of the present invention, the positioning groove and the limiting member abut against each other to achieve installation positioning, and the distance between adjacent positioning grooves along the height direction is between 10-30 mm.

[0016] As a further improvement of one embodiment of the present invention, the refrigeration equipment includes a box body and a door body, and the box body and / or the door body are integrally formed with the positioning groove; or, the box body and / or the door body are provided with an adjustment base, and the adjustment base is provided with the positioning groove.

[0017] As a further improvement of one embodiment of the present invention, each of the positioning grooves includes a first abutment plane and a first guide slope, and the positioning protrusion includes a second abutment plane and a second guide slope. When the positioning protrusion is in a positioning state, the second abutment plane abuts against the first abutment plane; the second guide slope abuts upward against and slides over the first guide slope, so that the positioning protrusion slides out of the positioning groove.

[0018] Compared with the prior art, the present invention provides a shelf assembly, including a shelf body and an adjustment assembly arranged in cooperation with the shelf body, which can realize multi-level adjustment of the shelf body in a small range. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 1 is a perspective view of a rack assembly according to one embodiment of the present invention.

[0020] Figure 2 It is a schematic diagram of the cooperation between the shelf assembly and the adjustment base in one embodiment of the present invention.

[0021] Figure 3 It is a schematic diagram of a decomposed adjustment component in one embodiment of the present invention.

[0022] Figure 4 yes Figure 3 A perspective view of the middle adjustment assembly.

[0023] Figure 5 yes Figure 4 Exploded view of the middle adjustment assembly.

[0024] Figure 6 yes Figure 3 A three-dimensional image from another angle.

[0025] Figure 7 yes Figure 6 A perspective view of the middle adjustment assembly.

[0026] Figure 8 yes Figure 7 Exploded view of the middle adjustment assembly.

[0027] Fig. 9 2 is a cross-sectional view of a rack assembly along the front-to-back direction in one embodiment of the present invention.

[0028] Fig.10 yes Fig. 9 Magnified view of the structure in the box.

[0029] Fig.11 It is a three-dimensional diagram of the cooperation between the door body and the shelf assembly in one embodiment of the present invention.

[0030] Fig.12 It is a schematic diagram of the decomposition of the door body and the shelf assembly in one embodiment of the present invention. DETAILED DESCRIPTION

[0031] The present invention will be described in detail below in conjunction with the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional changes made by a person skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0032] As used herein, terms indicating spatial relative positions such as "upper," "above," "lower," and "below" are used for the purpose of convenience to describe the relationship of one unit or feature relative to another unit or feature as shown in the accompanying drawings. Terms of spatial relative position may be intended to include different orientations of the device in use or operation in addition to the orientation shown in the drawings. For example, if the device in the figure is turned over, units described as being "below" or "beneath" other units or features will be located "above" the other units or features. Thus, the exemplary term "below" can encompass both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein interpreted accordingly.

[0033] See also Figure 1-3 , is a schematic structural diagram of a shelf assembly 100 provided in one embodiment of the present invention. The shelf assembly 100 can be applied to a box body or a door body.

[0034] Preferably, the rack assembly 100 includes a rack body 10 and an adjustment assembly 20 arranged in cooperation with the rack body 10, the rack body 10 is used to store items, and the adjustment assembly 20 is used to adjust the height position of the rack body 10 in the vertical direction to adjust the storage space formed above the rack body 10 to accommodate items of different sizes.

[0035] Preferably, the adjustment assembly 20 includes a limit block 30 arranged in cooperation with the rack body 10 and a driving assembly 40 for driving the limit block 30 to move in the lateral direction. The driving assembly 40 includes a pressing rod 41 and a driving shaft 51 arranged at one end of the pressing rod 41, the driving shaft 51 passes through both sides of the limit block 30, the pressing rod 41 drives the driving shaft 51 to move, and the driving shaft 51 drives the limit block 30 to move, so as to realize the lateral movement of the limit block 30.

[0036] Reference Figure 4-10 As shown, the stopper 30 moves in the lateral direction, and the stopper 30 has a positioning state of protruding from the rack body 10, and an adjustment state of being retracted into the rack body 10. Preferably, the rack body 10 can be adjusted in height, and the minimum single adjustment value of the rack body 10 is in the range of 10-30 mm; in a specific embodiment, a small range of 10-15 mm height adjustment can be achieved.

[0037] In this way, the adjustment component 20 can realize the function of multi-level adjustment of the shelf body 10 in a small range, thereby meeting the user's demand for a wider range of space sizes; at the same time, the shelf assembly 100 needs to be driven and adjusted by the pressing rod 41 before the shelf body 10 can be removed, which can prevent children from easily removing it and improve safety.

[0038] The rack body 10 is a drawer-shaped receiving space, which is used to be installed on a door body and / or a box body. The rack body 10 includes side walls 11 located on both sides of the horizontal direction, and the side walls 11 are provided with a receiving space 110, and the receiving space 110 is penetrated toward the outside, and the adjustment component 20 is arranged in the receiving space 110; the rack body 10 also includes a rear wall connecting the two side walls 11. In other embodiments, the adjustment component 20 can also be arranged on the rear wall.

[0039] Preferably, the stop block 30 is provided with an inclined slot 301, and the drive shaft 51 passes through the inclined slot 301 and moves vertically along the inclined slot 301 to drive the stop block 30 to move horizontally. Specifically, the pressing rod 41 drives the drive shaft 51 to move vertically, applies a vertical force to the stop block 30, and the stop block 30 cannot move vertically. The function of the inclined slot 301 is to allow the drive shaft 51 to move vertically and drive the stop block 30 to move horizontally.

[0040] The inclined slide groove 301 is low on the outside and high on the inside, so that when the driving shaft 51 moves downward, the driving limit block 30 moves inward accordingly.

[0041] Preferably, the driving assembly 40 includes a guide slide seat 42, and the guide slide seat 42 has a hollow receiving groove 420 to accommodate the limit block 30. The two side walls of the guide slide seat 42 are provided with vertical grooves 421. The two ends of the driving shaft 51 pass through the vertical grooves 421 and move vertically along the vertical grooves 421, so as to limit the driving shaft 51 to only move vertically.

[0042] The guide slide seat 42 is fixed to the receiving space 110 of the side wall 11 and receives the limit block 30 therein. The guide slide seat 42 is square in shape, and its surrounding walls are attached to the inner wall surface of the receiving space 110 so as to be fixed in the receiving space 110 and cannot move. The receiving groove 420 is horizontally penetrated, so that the limit block 30 can move horizontally in the receiving groove 420 but is vertically limited to the guide slide seat 42.

[0043] A snap-fit ​​protrusion 422 is disposed on the inner side of the guide slide seat 42 corresponding to the receiving groove 420 . The snap-fit ​​protrusion 422 is used to snap-fit ​​and fix with the side wall 11 . The movement of the guide slide seat 42 may also be limited by other fixing methods.

[0044] A vertical groove 421 is set on the side wall of the guide slide seat 42 along the front-to-back direction. Since the guide slide seat 42 is immovable, the drive shaft 51 can only move in the vertical direction, and the drive shaft simultaneously passes through the limit block 30 in the guide slide seat 42. In this way, the drive shaft 51 applies a horizontal force to the limit block through the inclined slide groove 301, so that the limit block 30 moves laterally under the drive of the drive shaft 51.

[0045] Preferably, the pressing rod 41 includes a square rod 411 and a cylindrical rod 412, the square rod 411 is exposed upward to the side wall to form a pressing portion 410, the cylindrical rod 412 extends from the lower surface of the square rod 411, the diameter of the cylindrical rod 412 is smaller than the width of the square rod 412, and the driving assembly 40 includes a spring 43 sleeved on the cylindrical rod 412, one end of the spring 43 abuts the square rod 411, and the other end abuts the guide slide seat 42.

[0046] In this way, when the pressing rod 41 moves downward, the square rod 411 moves downward, while the guide slide 42 does not move, and the square rod 411 will abut against the spring 43 downward, so that the spring 43 has elastic force, which is convenient for subsequent reset. In other embodiments, if the spring 43 is not provided, the limit block 30 cannot be automatically reset, but can also be manually reset by pulling the pressing rod 41.

[0047] Preferably, a connecting block 413 is provided at one end of the cylindrical rod 412 away from the square rod 411, and the connecting block 413 is arranged in the limit block 30. The driving shaft 51 passes through the connecting block 413, and the driving shaft 51 passes through the connecting block 413, the limit block 30 and the guide slide seat 42 in sequence.

[0048] The cylindrical rod 412 is connected to the connecting block 413 by threads, and the cylindrical rod 412, the square rod 411 and the connecting block 413 move as a whole, and the connecting block 413 is located in the limit block 30, and the drive shaft 41 passes through the connecting block, and the spring 43 is sleeved on the cylindrical rod 412, so as to be located between the square rod 411 and the connecting block 413. In other words, the spring 43 abuts against the square rod 411 upwards and abuts against the guide slide seat 42 downwards. In this way, the pressing rod 41 moves downward, the connecting block 413 and the driving shaft 51 move downward, and the spring sleeved on the cylindrical rod 412 is compressed and has elastic force due to the abutment against the guide slide seat 42.

[0049] Preferably, the limit block 30 includes a main block 31 and a protruding block 32 located outside the main block 31 , the main block 31 is provided with a hollow activity space 310 , the inclined slide groove 301 is connected to the activity space 310 , and the connecting block 413 is arranged in the activity space 310 .

[0050] Thus, when the limit block 30 moves in the lateral direction, due to the existence of the activity space 310, the limit block 30 moves relative to the connecting block 413. It is understandable that the distance of the activity space 310 in the lateral direction should not be less than the distance of the inclined slide groove 301 in the lateral direction, so that the connecting block 413 has enough movement space to match the movement of the limit block 30 in the lateral direction.

[0051] The adjustment assembly 20 includes a decorative cover 60 , which covers the receiving space 110 and exposes the limiting block 30 . The outer surface of the decorative cover 60 is flush with the outer surface of the side wall 11 .

[0052] Specifically, refer to Figure 4-5 As shown in 9-10, by pressing the pressing portion 410, the pressing rod 41 moves downward, driving the driving shaft 51 to move vertically downward. At this time, the spring 43 is compressed, and the driving shaft 51 presses downward against the inclined groove 301 of the limit block 30, and the limit block 30 moves inward until it is accommodated in the accommodating space 110.

[0053] When the pressing portion 410 is released, the spring 43 is compressed and has elastic force, which reacts on the square rod 411, causing the square rod 411 to move upward, driving the pressing member 41 to reset upward, and at the same time driving the driving shaft 51 to move upward, and the limit block 30 moves out of the receiving space 110.

[0054] In other embodiments, if there is no spring 43 to reset, the pressing portion 410 is manually pulled up, the pressing rod 41 moves upward, driving the driving shaft 51 to move vertically upward, the driving shaft 51 presses upward against the inclined groove 301 of the limit block 30, and the limit block 30 moves outward.

[0055] The present invention also includes a refrigeration device, such as a refrigerator, which includes the above-mentioned shelf assembly 100. Specifically, the refrigerator includes a box body and a door body. The box body can be correspondingly provided with the above-mentioned shelf assembly 100 that can be adjusted in a small range, and the door body can also be correspondingly provided with the above-mentioned shelf assembly 100 that can be adjusted in a small range. Figure 11-12 As shown, users can configure according to their needs.

[0056] Preferably, the refrigerator includes a positioning groove 200 that is arranged in cooperation with the shelf assembly 100, and the positioning groove 200 is abutted against the limiting block 30 to achieve installation positioning, and the distance between adjacent positioning grooves 200 along the height direction of the refrigerator is between 10-30 mm. Specifically, the distance between the positioning grooves 200 refers to the distance between the bottom or top or the middle of two adjacent positioning grooves 200, that is, the limiting block 30 adjusts the required distance between adjacent positioning grooves 200.

[0057] Preferably, the box body and / or the door body are integrally formed with the positioning groove 200 ; or, the box body and / or the door body are provided with an adjustment base, and the adjustment base is provided with the positioning groove 200 .

[0058] In a specific embodiment, the shelf assembly 100 is applied to a door body. When the door body is foamed, the adjustment base provided with a positioning groove 200 is integrated into the door body lining, and the door body is foamed as a whole, or the door body lining is integrally formed with the positioning groove 200, and the box body is arranged in the same manner.

[0059] Preferably, each of the positioning grooves 200 includes a first abutment plane 201 and a first guide slope 202, and the protruding block 32 includes a second abutment plane 321 and a second guide slope 322. When the limit block 30 is in abutment with the door body and / or the box body and is in a positioning state, the second abutment plane 321 abuts against the first abutment plane 201; the second guide slope 322 abuts upward and slides over the first guide slope 202, so that the protruding block 32 slides out of the positioning groove 200.

[0060] The installation process and adjustment process of the rack assembly 100 will be briefly described below, and only the assembly steps of one side of the rack assembly 100 are shown, and the other side is the same.

[0061] First, the square rod 411 and the round rod 412 are integrally formed, the connecting block 413 is connected to the end of the round rod 412 by threaded connection or other fixing methods, and then the spring 43 is sleeved on the outer circumference of the round rod 412.

[0062] Next, the limit block 30 is installed into the guide slide seat 42, and then the pre-installed pressing piece 41 and the spring 43 are installed into the corresponding hollow receiving groove 420 of the guide slide seat 42. At this time, the connecting block 413 is located in the movable space 310 of the limit block 30. After the corresponding holes of the connecting block 413 and the inclined slide groove 301 and the vertical groove 421 are aligned, the drive shaft 51 is inserted, and the connecting block 413, the guide slide seat 42, and the limit block 30 are fixedly connected, so that the limit block 30 can only move in the guide slide seat 42, and the spring 43 abuts against the square rod 411 upwards and abuts against the guide slide seat 42 downwards.

[0063] Secondly, the assembled drive assembly 40 and the limit block 30 are installed into the receiving space of the shelf body 10. The guide slide seat 42 is fixed to the side wall 11 by the snap-on protrusion 422. The fixing method does not serve as a limiting adjustment and can be other fixing methods; the side surfaces along the front and rear squares of the square rod 411 are in contact with the inner wall surface of the receiving space and move vertically along the inner wall surface of the receiving space 110.

[0064] Finally, the decorative cover is fixed to the shelf body 10 by snapping or other positioning methods, and the assembly is completed.

[0065] First, the pressing rod 41 is pressed by hand, and the square rod 411, the round rod 412 and the connecting block 413 move downward as a whole, driving the driving shaft 51 to move downward along the vertical slot 421 of the guide slide seat 42, and the spring 43 is compressed. At the same time, the driving shaft 51 presses against the inclined slot 301 of the limit block 30, which will apply a horizontal movement component to the limit block 30, so that the limit block 30 moves inward until it is received inside the rack body 10; at this time, the limit block 30 is released from the abutment and positioning with the positioning slot 200, and the rack body 10 can be adjusted in height vertically.

[0066] After releasing the hand, the reaction force of the spring 43 pushes the pressing rod 41 to reset upward, driving the driving shaft 51 to move upward, so as to drive the limiting block 30 to reset outward until it abuts against the positioning groove 200 .

[0067] It is understandable that when the shelf assembly 100 is installed in the positioning groove 200 of the door body and / or the box body, if the elastic force to overcome the spring 43 is small, the shelf assembly 100 can move directly upward for adjustment. Specifically, the shelf body 10 is directly forced upward, the second guide bevel 322 abuts upward and slides over the first guide bevel 202, and the limit block 30 can slide out of the positioning groove 200 for height adjustment.

[0068] In a specific embodiment, if the elastic force of the spring 43 is too large to overcome, the rack assembly 100 cannot move upward directly, and the pressing rod 41 still needs to be pressed manually to retract the limit block 30 into the receiving space 110 and then adjust it upward.

[0069] Since the second abutment plane 321 abuts against the first abutment plane 201 in the vertical direction, it cannot be adjusted downward directly. The limit block 30 needs to be retracted into the rack body 10, and the adjustment member 20 and the positioning groove 200 are released from the abutment and positioning. Then, you can let go and the rack body 10 moves downward. When a click sound is heard, the limit block 30 is stuck in the positioning groove 200 of the lower level, thereby achieving downward adjustment.

[0070] If the shelf body 10 is to be removed from the door body and / or the box body, the pressing part 410 can only be operated to retract the limit block 30 inside to remove the shelf assembly 100. Children cannot easily remove the shelf body 10, thereby preventing the shelf body 10 from being easily removed and falling to injure children.

[0071] The beneficial effects of the present invention are as follows: the shelf body 10 can achieve multi-level adjustment in a small range of at least 10 mm; the shelf assembly 100 can be taken out only by pressing the pressing portion 410, thereby preventing children from accidentally touching or getting hurt.

[0072] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0073] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A shelf assembly, characterized in that: It includes a shelf body and an adjusting component arranged in cooperation with the shelf body; the adjusting component includes a limit block arranged in cooperation with the shelf body and a driving component for driving the limit block to move laterally, the driving component includes a pressing rod and a driving shaft arranged at one end of the pressing rod, the driving shaft passes through both sides of the limit block, the pressing rod drives the driving shaft to move, and the driving shaft drives the limit block to move.

2. The rack assembly according to claim 1, characterized in that: The minimum single adjustment range of the shelf body along the height direction is 10-30 mm.

3. The rack assembly according to claim 1, characterized in that: The limit block is provided with an inclined slide groove, and the driving shaft passes through the inclined slide groove and moves vertically along the inclined slide groove to drive the limit block to move horizontally.

4. The rack assembly according to claim 3, characterized in that: The driving assembly comprises a guide slide seat, which has a hollow receiving groove for receiving a limit block. The two side walls of the guide slide seat are provided with vertical grooves, and the two ends of the driving shaft pass through the vertical grooves and move vertically along the vertical grooves.

5. The rack assembly according to claim 4, characterized in that: The guide slide seat is fixed to the side wall of the shelf body, and the pressing rod includes a square rod and a cylindrical rod. The square rod is exposed upward to the side wall to form a pressing portion, and the cylindrical rod extends from the lower surface of the square rod. The diameter of the cylindrical rod is smaller than the width of the square rod. The driving assembly includes a spring sleeved on the cylindrical rod, one end of the spring abuts the square rod, and the other end abuts the guide slide seat.

6. The rack assembly according to claim 5, characterized in that: A connecting block is provided at one end of the cylindrical rod away from the square rod. The connecting block is arranged in the limiting block. The driving shaft passes through the connecting block. The driving shaft passes through the connecting block, the limiting block and the guide slide seat in sequence.

7. The rack assembly according to claim 6, characterized in that: The limit block comprises a main body block and a protruding block located outside the main body block, the main body block is provided with a hollow activity space, the inclined slide groove is connected with the activity space, and the connecting block is arranged in the activity space.

8. The rack assembly according to claim 1, characterized in that: The side wall of the shelf body is provided with a receiving space to receive the driving assembly, and the adjusting assembly comprises a decorative cover, which covers the receiving space, and the outer surface of the decorative cover is flush with the outer surface of the side wall.

9. A refrigeration device, characterized in that: It comprises the rack assembly according to any one of claims 1 to 8 and a positioning groove arranged in cooperation with the rack assembly.

10. The refrigeration device according to claim 9, characterized in that: The positioning grooves are abutted against the limiting member to achieve installation positioning, and the distance between adjacent positioning grooves along the height direction is between 10-30 mm.

11. The refrigeration device according to claim 9, characterized in that: The refrigeration device comprises a box body and a door body, and the box body and / or the door body are integrally formed with the positioning groove; or the box body and / or the door body are provided with an adjustment base, and the adjustment base is provided with the positioning groove.

12. The refrigeration device according to claim 9, characterized in that: Each of the positioning grooves includes a first abutment plane and a first guide slope, and the positioning protrusion includes a second abutment plane and a second guide slope. When the positioning protrusion is in a positioning state, the second abutment plane abuts against the first abutment plane; the second guide slope abuts upward against and slides over the first guide slope, so that the positioning protrusion slides out of the positioning groove.

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