Bolt structure and transport case
The combined structure of the latch plate, drive assembly and guide sleeve solves the problems of inconvenient operation and easy loss of the latch structure in the existing transport box, realizes the simplification of the latch operation and the synchronous and stable fixation of multiple pins.
Patent Information
- Application Number
- CN202423108480.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-16
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-12-16
AI Technical Summary
The latch structure in the existing transport box has the problems of being inconvenient to operate, being too long and being easy to lose.
The latch plate is driven by the meshing of the rack and the gear, and the pin is inserted into the guide sleeve to achieve stable guidance of the latch plate and multiple fixed-point insertion.
The latching operation is simplified, the excessive length of the pins and the loss of independent settings are avoided, and the synchronous movement and stable fixation of multiple pins are achieved.
Smart Images
Figure CN223444311U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to transportation equipment technical field, concretely relates to a latch structure and transportation case. BACKGROUND
[0002] In some existing transportation cases, telescopic columns are arranged, such as telescopic columns for adjusting the height of the upper layer transportation frame in the double-layer transportation frame, and telescopic angle columns for hoisting. The telescopic column has a latch hole, and the latch is inserted into the latch hole to fix the telescopic column. However, the existing latch structure usually has problems such as inconvenient operation, too long length, and easy loss due to independent arrangement.
[0003] Therefore, a latch structure and transportation case are needed to at least partially solve the above problems. SUMMARY
[0004] A series of simplified concepts are introduced in the summary part, which will be further described in detail in the specific embodiment part. The summary part of the utility model does not mean to try to limit the key features and necessary technical features of the claimed technical solution, and even less means to determine the protection scope of the claimed technical solution.
[0005] To at least partially solve the above problems, the utility model provides a latch structure in the first aspect, which is used for fixing the telescopic column of the transportation case. The telescopic column includes an inner column provided with a first pin hole and an outer column provided with a second pin hole. The latch structure includes:
[0006] A latch plate, the latch plate includes:
[0007] A connecting beam; and
[0008] A pin column, one end of the pin column is fixedly connected to the connecting beam;
[0009] A driving assembly, the driving assembly includes:
[0010] A rack, the rack is arranged in parallel with the pin column and is fixedly connected to the connecting beam;
[0011] A pivoting lever, the pivoting lever is fixedly provided with a gear, and the gear is engaged with the rack to drive the latch plate to move; and
[0012] A guide sleeve, which is used for being fixed to the outer column and guiding the movement of the latch plate, so that the latch plate can move to the other end of the pin column to insert into or disengage from the first pin hole and the second pin hole. Wherein, the guide sleeve is a hollow structure, and the pin column and / or the rack are arranged in the guide sleeve.
[0013] According to the utility model discloses a latch structure, through the setting drive of rack and pinion, transmission mechanism is simple, efficient, reliable. Rack and pin are parallelly arranged separately, can avoid the length of pin post too long. And, through the pin post or rack is set in the guide sleeve, thereby when the latch plate moves to the pin post and separates the pinhole of telescopic stand, under the action of guide sleeve, do not need to take down the latch plate alone, avoid losing. The utility model discloses a latch structure still has the connecting beam, so that the rack and multiple pin posts can be fixed to the connecting beam to move simultaneously, can realize multiple fixed point insertion.
[0014] Optionally, the guide sleeve includes a first guide sleeve, the first guide sleeve is correspondingly arranged with the position and size of the second pin hole of the outer layer stand, and the pin post is arranged in the first guide sleeve.
[0015] Optionally, the guide sleeve includes a second guide sleeve, the second guide sleeve has a guide groove extending along the moving direction of the latch plate, and the rack is arranged in the guide groove of the second guide sleeve.
[0016] Optionally, the driving assembly includes at least two supports, the supports are used for being fixed to the transport box, the pivot lever is arranged in the supports and can pivot in the supports.
[0017] Optionally, the driving assembly further includes a pawl, the pivot lever is further provided with a ratchet wheel, the pawl is used for being fixed to the transport box and cooperating with the ratchet wheel to make the pivot lever pivot in one direction; and / or
[0018] The pivot lever is fixedly provided with a handle.
[0019] Optionally, the latch structure further includes a tension spring, one end of the tension spring is fixedly connected to the latch plate, the other end is used for being fixedly connected to the outer layer stand, and the tension spring has a pulling force on the latch plate in the direction towards the outer layer stand.
[0020] Optionally, the latch plate has an unlocked position, in the unlocked position, the pin post is separated from the first pin hole and the second pin hole;
[0021] The first guide sleeve is provided with a spring pin, the pin post is provided with at least one third pin hole for inserting the spring pin, and the third pin hole is arranged at the position of the pin post so that the spring pin is inserted into the third pin hole at least when the latch plate is in the unlocked position.
[0022] Optionally, the latch plate includes at least two pin posts, the at least two pin posts are arranged in parallel and fixedly connected to the same side of the connecting beam, and each pin post is arranged in one guide sleeve.
[0023] Optionally, the latch plate comprises a first pin post and a second pin post;
[0024] The first pin post and the second pin post are used for being respectively inserted into different pin holes of the same telescopic stand; or
[0025] The first pin post and the second pin post are used for being respectively inserted into pin holes of different telescopic stands.
[0026] The utility model discloses a second aspect provides a transport case, the transport case includes telescopic stand and the latch structure of any one of the first aspect. The telescopic stand includes inner layer stand and outer layer stand, the outer layer stand is set on the outside of the inner layer stand, the inner layer stand is provided with first pin hole, the outer layer stand is provided with second pin hole, the inner layer stand can move along the axial direction relative to the outer layer stand. Wherein, the guide sleeve is fixedly connected to the outer layer stand, and the pin post can be inserted or separated from the first pin hole and the second pin hole.
[0027] Optionally, the inner layer stand is provided with at least two first pin holes arranged at intervals; and / or
[0028] The outer layer stand is provided with at least two second pin holes arranged at intervals.
[0029] Optionally, the pivot lever is fixedly provided with a first rotating wheel, the driving assembly further comprises an operating rod, the operating rod is fixedly provided with a second rotating wheel and a handle, the first rotating wheel and the second rotating wheel are driven by a belt, and the height of the second rotating wheel is lower than the height of the first rotating wheel.
[0030] According to the transport case of the utility model, the latch structure of telescopic stand is simple to operate, the rack and the pin post are arranged in parallel, the length of the pin post can be avoided to be too long. A plurality of pin posts can be driven to move simultaneously through the connecting beam, and the latch plate does not need to be separated from the transport case. For the position that is difficult to operate due to high height, the transmission belt and the rotating wheel can be operated at a lower position. BRIEF DESCRIPTION OF DRAWINGS
[0031] The following drawings of the utility model are used as a part of the utility model for understanding the utility model. The drawings of the utility model show the embodiments of the utility model and the description thereof, which are used to explain the principle of the utility model.
[0032] Figure 1 It is a structural schematic view of the transport case according to the specific embodiment of the utility model;
[0033] Figure 2 It is Figure 1 It is a partial enlarged schematic view of region A;
[0034] Figure 3 It isFigure 2 Partial enlarged view of the middle region B;
[0035] Figure 4 Part structure schematic view of the latch structure shown in Figure 3
[0036] Figure 5 Part structure schematic view of the driving assembly of the latch structure shown in Figure 2
[0037] Figure 6 Partial enlarged view of the middle region C; and Figure 2
[0038] Figure 7 Partial enlarged view of the transport box shown in Figure 1
[0039] BRIEF DESCRIPTION OF THE DRAWINGS
[0040] 10: Latch plate
[0041] 11: Connecting beam
[0042] 12: Pin post
[0043] 12a: Third pin hole
[0044] 21: Rack
[0045] 22: Gear
[0046] 23: Pivoting lever
[0047] 24: Bracket
[0048] 25: Handle
[0049] 26: Ratchet wheel
[0050] 27: Pawl
[0051] 28: Operating lever
[0052] 29: First rotating wheel
[0053] 30: Second rotating wheel
[0054] 31: Belt
[0055] 32: First guide sleeve
[0056] 33: Second guide sleeve
[0057] 34: Spring pin
[0058] 40: Tension spring
[0059] 110: Inner layer stand
[0060] 110a: first pin hole
[0061] 120: outer layer post
[0062] 120a: second pin hole
[0063] 121: fixing plate
[0064] 200: transport case
[0065] D1: length direction
[0066] D2: width direction
[0067] D3: height direction DETAILED DESCRIPTION
[0068] In the following description, numerous specific details are set forth to provide a more thorough understanding of the present application. However, it will be apparent to one of ordinary skill in the art that the present application can be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the present application.
[0069] For a thorough understanding of the present application, reference should be made to the following detailed description. It should be understood that the embodiments described herein are only examples of the present application and that many variations and modifications can be made which will be apparent to those having ordinary skill in the art. It is the intent, therefore, to encompass all such variations and modifications as fall within the scope of the present application. The description of illustrative embodiments is intended to be read in connection with the accompanying drawings, which are depicted below.
[0070] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.
[0071] Numerical ordinals such as "first" and "second" as used in this application are used merely to identify a particular feature, and do not imply any specific order or order of sequence. Further, use of the terms "first" and "second" are not intended to limit the quantity of such features to two, unless specifically called for. For example, the term "first component" does not imply the existence of a "second component", and the term "second component" does not imply the existence of a "first component".
[0072] It should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer" and similar expressions used herein are for illustrative purposes only and are not limiting.
[0073] The utility model provides a latch structure and transport case, the latch structure is used for fixing the telescopic stand of transport case. Telescopic stand includes the inner layer stand of first pin hole and the outer layer stand of second pin hole, the inner layer stand can move along the axial direction with the outer layer stand, the pin column of latch structure is inserted into first pin hole and second pin hole, can prevent the relative movement of inner layer stand and outer layer stand.
[0074] Now, exemplary embodiments according to the utility model will be described in more detail with reference to the accompanying drawings.
[0075] As Figures 1 to 5 The utility model provides a latch structure for fixing the telescopic stand of transport case 200. The latch structure includes a latch plate 10, a driving assembly, and a guide sleeve. The latch plate 10 is used to fix the telescopic stand, the driving assembly is used to drive the movement of the latch plate 10, and the guide sleeve is used to limit the movement of the latch plate 10 and guide the movement of the latch plate 10.
[0076] The latch plate 10 includes a connecting beam 11 and a pin column 12. One end of the pin column 12 is fixedly connected to the connecting beam 11, and the other end of the pin column 12 can be inserted into or withdrawn from the pin hole of the telescopic stand as the latch plate 10 moves. The driving assembly includes a rack 21 and a pivoting lever 23. The rack 21 is parallel to the pin column 12 and is fixedly connected to the connecting beam 11. The pivoting lever 23 is fixedly provided with a gear 22. The gear 22 is engaged with the rack 21 to drive the movement of the latch plate 10. The guide sleeve is a hollow structure and is fixed to the outer layer stand 120. The pin column 12 and / or the rack 21 are arranged in the guide sleeve to guide the movement of the latch plate 10. Thus, the latch plate 10 can be moved to the other end of the pin column 12 to insert or separate from the first pin hole 110a and the second pin hole 120a, so as to convert the telescopic stand between the fixed state and the unlocked state.
[0077] The latch structure of the utility model can drive the movement of the latch plate 10 by rotating the pivoting lever 23 to drive the rack 21 through the gear 22, control the pin column 12 of the latch plate 10 to insert or withdraw from the pin hole, and fix or unlock the telescopic stand, which is convenient to operate. The pin column 12 and / or the rack 21 are arranged in the guide sleeve, and the latch plate 10 does not need to be separated from the transport case 200. The rack 21 is parallel to the pin column 12, which can avoid the pin column 12 being too long. In addition, the connecting beam 11 can fixedly connect multiple pin columns 12, and the multiple pin columns 12 can move simultaneously, for example, to fix or unlock multiple telescopic stands simultaneously, or to fix or unlock the same telescopic stand through two or more pin columns 12.
[0078] It should be noted that the extension direction of the pin column 12 and the pivot lever 23 and the moving direction of the latch plate 10 are not limited in the latch structure of the utility model. For example, the latch structure can be used for the telescopic stand whose pin hole is along the length direction D1 of the transport box 200, accordingly, the pin column 12 extends along the length direction D1 of the transport box 200, the latch plate 10 moves along the length direction D1 of the transport box 200, and the pivot lever 23 extends along the width direction D2 of the transport box 200. For example, the connecting beam 11 is along the height direction D3 of the transport box 200, the pivot lever 23 is along the height direction D3 of the transport box 200, and the plurality of pin columns 12 are connected to the connecting beam 11 at intervals along the height direction D3 of the transport box 200.
[0079] Preferably, as shown in Figure 1 and Figure 2 , the pivot lever 23 is arranged to extend along the length direction D1 of the transport box 200, the pin column 12 extends along the width direction D2 of the transport box 200, and the latch plate 10 moves along the width direction D2 of the transport box 200, for fixing the telescopic stand whose pin hole is along the width direction D2 of the transport box 200.
[0080] In order to position and support the pivot lever 23, the driving assembly comprises at least two supports 24, the support 24 is used for being fixed to the transport box 200, for example, being fixed to the outer stand 120, and the pivot lever 23 is arranged to pass through the support 24 and can pivot in the support 24. Thus, the pivot lever 23 is pivotably connected to the transport box 200 through the support 24, and the latch plate 10 is driven to move by the transmission of the gear 22 and the rack 21 in the pivoting process. Preferably, the pivot lever 23 is fixedly provided with a handle 25, which is convenient for the operator to rotate the pivot lever 23.
[0081] Preferably, as shown in Figure 4 and Figure 5 , two gears 22 are arranged at intervals on the pivot lever 23, and the connecting beam 11 is fixedly connected with two racks 21, and the two racks 21 are preferably located on the two sides of the pin column 12 respectively. Thus, the driving of the pivot lever 23 to the latch plate 10 is more stable. Of course, the pivot lever 23 can be provided with only one gear 22 or more gears 22, and the connecting beam 11 can be fixedly connected with one or more racks 21. For example, the connecting beam 11 is fixedly connected with only one rack 21 at the middle position.
[0082] Preferably, the latch plate 10 comprises at least two pins 12, which are spaced and parallel, and fixedly connected to the same side of the connecting beam 11, so that the pins 12 can move with the connecting beam 11. The plurality of pins 12 can be respectively inserted into the pin holes of different telescopic columns to simultaneously fix the plurality of telescopic columns, and the plurality of pins 12 can be simultaneously withdrawn from the pin holes of different telescopic columns to simultaneously unlock the plurality of telescopic columns. Alternatively, at least part of the pins 12 are used to be inserted into different pin holes on the same telescopic column, so that the fixation of the telescopic column has higher structural strength.
[0083] In a specific embodiment, as shown in Figure 4 , the latch plate 10 comprises a first pin 12 and a second pin 12. As shown in Figure 2 and Figure 7 , three groups of telescopic columns are arranged side by side along the length direction D1 of the transport box 200, and the telescopic column in the middle is arranged with two pin holes along the length direction D1. The first pin 12 and the second pin 12 of the upper latch plate 10 are used to be inserted into the two pin holes arranged along the length direction D1 of the middle telescopic column. The first pin 12 and the second pin 12 of the lower latch plate 10 are used to be inserted into the pin holes of different telescopic columns, i.e. the pin holes of the two groups of telescopic columns on both sides of the middle telescopic column.
[0084] For the movement guide of the latch plate 10, the latch structure comprises at least one guide sleeve, and the pins 12 or the racks 21 can be arranged in the guide sleeve to move the latch plate 10 in the axial direction of the guide sleeve. After the pins 12 are withdrawn from the pin holes of the telescopic columns, the latch plate 10 can still be kept in the guide sleeve without being separated from the transport box 200. It should be noted that the number of guide sleeves can be different from the number of pins 12, for example, part of the pins 12 are arranged in the guide sleeve. Preferably, at least part of the pins 12 and the racks 21 are arranged in the guide sleeve. More preferably, each pin 12 is arranged in one guide sleeve, and each rack 21 is arranged in one guide sleeve.
[0085] As shown in Figure 3 and Figure 4 , the latch structure comprises a first guide sleeve 32, which is arranged corresponding to the second pin hole 120a of the outer column 120, and the pin 12 is arranged in the first guide sleeve 32. That is, the first guide sleeve 32 is arranged corresponding to the position and size of the second pin hole 120a of the outer column 120, and one pin 12 is arranged in one guide sleeve, so that the pin 12 can be moved along the guide sleeve and inserted into the pin hole of the telescopic column. Preferably, the first guide sleeve 32 is arranged corresponding to the number of second pin holes 120a of the outer column 120.
[0086] The outer peripheral contour of the cross section of the pin 12 is preferably identical to the shape of the pin hole of the telescopic stand. The inner peripheral contour of the cross section of the guide sleeve is preferably identical to the pin hole. The inner peripheral dimension of the guide sleeve is preferably identical to the dimension of the pin hole, and the outer peripheral dimension of the pin 12 is slightly smaller than the pin hole, so that the pin 12 can move within the guide sleeve but not too loosely.
[0087] The guide sleeve comprises a second guide sleeve 33 having a guide groove extending in the moving direction of the latch plate 10, and the rack 21 is arranged in the guide groove of the second guide sleeve 33. The second guide sleeve 33 is preferably a downwardly open groove, and can also be a cylinder. It can be understood that even in the embodiment without the first guide sleeve 32, the rack 21 can still keep the latch plate 10 stable after moving to the position where the pin 12 is disengaged from the pin hole of the telescopic stand under the support of the gear 22 and the limiting of the second guide sleeve 33, so that the latch plate 10 does not have to be separated from the transport case 200.
[0088] The latch structure further comprises a tension spring 40, one end of which is fixedly connected to the latch plate 10, and the other end is used for fixedly connecting to the outer layer stand 120. The tension spring 40 has a pulling force on the latch plate 10 in the direction towards the outer layer stand 120. The pulling force of the tension spring 40 can prevent accidental movement of the latch plate 10, and avoid the pin 12 from being disengaged from the pin hole of the telescopic stand due to tilting, jolting, etc. of the transport case 200 in use. The tension spring 40 can be connected to the connecting beam 11 of the latch plate 10, or can be connected to the pin 12.
[0089] The latch plate 10 has an unlocked position and a locked position. In the unlocked position, the pin 12 is disengaged from the first pin hole 110a and the second pin hole 120a, and the inner layer stand 110 and the outer layer stand 120 can move relatively. In the locked position, the pin 12 is inserted into the first pin hole 110a and the second pin hole 120a, and prevents the relative movement of the inner layer stand and the outer layer stand 120.
[0090] The latch structure further comprises a spring pin 34, and the pin 12 is provided with at least one third pin hole 12a for the spring pin 34 to be inserted into. For example, the third pin hole 12a is arranged at the position of the pin 12, so that when the latch plate 10 moves to the unlocked position, the pin head of the spring pin 34 is inserted into the third pin hole 12a, and the further movement of the latch plate 10 is prevented. For example, the third pin hole 12a can also be arranged at the position of the pin 12, so that when the latch plate 10 moves to the locked position, the pin head of the spring pin 34 is inserted into the third pin hole 12a, and the position of the latch plate 10 is fixed, i.e. the telescopic stand is kept in the locked state. In an example not shown, the spring pin 34 is arranged in the first guide sleeve 32, and the first guide sleeve 32 is provided with a hole through which the pin head of the spring pin 34 passes. Alternatively, as shown, the outer layer stand 120 has a fixing plate 121, and the spring pin 34 can be arranged in the fixing plate 121 of the outer layer stand 120. Figure 4
[0091] The driving assembly further comprises a pawl 27, and the pivoting rod 23 is further provided with a ratchet wheel 26, and the pawl 27 is used for being fixed to the transport box 200 and cooperating with the ratchet wheel 26 to make the pivoting rod 23 pivot unidirectionally. For example, the pawl 27 is arranged to prevent the pivoting rod 23 from rotating in the direction of inserting the first pin hole 110a and the second pin hole 120a into the driving pin plate 10. Therefore, the pivoting rod 23 can be prevented from being reversed during the rotation of the pivoting rod 23 by the operator. The pawl 27 can be fixed to the outer stand column 120 or other stand columns of the transport box 200.
[0092] As shown in Figure 1 and Figure 7 , the transport box 200 comprises a telescopic stand column, which comprises an inner stand column 110 and an outer stand column 120, the outer stand column 120 is sleeved outside the inner stand column 110, the inner stand column 110 is provided with a first pin hole 110a, the outer stand column 120 is provided with a second pin hole 120a, and the inner stand column 110 can move axially relative to the outer stand column 120.
[0093] The transport box 200 comprises the above-mentioned pin structure, and the pin column 12 of the pin structure is inserted into the first pin hole 110a and the second pin hole 120a to prevent the relative movement of the outer stand column 120 and the inner stand column 110. The pin structure comprises a guide sleeve, which is fixedly connected to the outer stand column 120, and the pin column 12 can move in the guide sleeve to be inserted into or separated from the first pin hole 110a and the second pin hole 120a, thereby fixing or unlocking the telescopic stand column.
[0094] In order to adjust the telescopic stand column to different heights, the inner stand column 110 of the transport box 200 is provided with at least two first pin holes 110a arranged at intervals along the height direction D3, or the outer stand column 120 is provided with at least two second pin holes 120a arranged at intervals along the height direction D3. In addition, the inner stand column 110 and the outer stand column 120 are both provided with at least two pin holes arranged at intervals along the height direction D3, and the connecting beam 11 can also be arranged to extend along the height direction D3, and a plurality of pin columns 12 are connected to the connecting beam 11 at intervals along the height direction D3, so as to fix the telescopic stand column by the plurality of pin columns 12. Of course, the inner stand column 110 and the outer stand column 120 of the transport box 200 can also be provided with at least two pin holes arranged at intervals along other directions.
[0095] When the position of the pin hole of the telescopic stand column is high and the operator is not convenient to perform the pivoting operation on the pivoting rod 23, the operating position can be lowered by the transmission device. Specifically, as shown in Figure 2As shown, the pivot lever 23 is fixedly provided with a first rotating wheel 29, the driving assembly further comprises an operating lever 28, the operating lever 28 is fixedly provided with a second rotating wheel 30 and a handle 25, the first rotating wheel 29 and the second rotating wheel 30 are driven through a belt 31. Wherein, the height of the second rotating wheel 30 is lower than the height of the first rotating wheel 29. When the operating personnel rotates the operating lever 28 through the handle 25 of the operating lever 28, the rotation of the second rotating wheel 30 drives the second rotating wheel 30 to rotate through the belt 31, and further drives the pivot lever 23 and the gear 22 fixed on the pivot lever 23 to rotate, realizing driving the movement of the bolt plate 10.
[0096] Unless otherwise defined, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. The features described in one embodiment can be applied to another embodiment, unless the features are not compatible with the other embodiment or are otherwise stated.
[0097] The application has been described by the above embodiments, but it should be understood that the above embodiments are only for the purpose of example and illustration, the application is not limited to the above embodiments, and more kinds of variations and modifications can be made according to the teaching of the application, and these variations and modifications all fall within the scope of the application claimed.
Claims
1. A latch structure for fixing a telescopic column of a transport box, wherein the telescopic column comprises an inner column provided with a first pin hole and an outer column provided with a second pin hole, characterized in that: The latch structure comprises: A latch plate, comprising: connecting beams; and a pin, one end of which is fixedly connected to the connecting beam; A drive assembly, comprising: a rack, the rack being arranged parallel to the pin and fixedly connected to the connecting beam; a pivoting rod, wherein a gear is fixedly mounted on the pivoting rod, and the gear is engaged with the rack to drive the latch plate to move; and A guide sleeve is used to be fixed to the outer column and guide the movement of the latch plate, so that the latch plate can move to the other end of the pin to insert into or disengage from the first pin hole and the second pin hole, wherein the guide sleeve is a hollow structure, and the pin and / or the rack are inserted into the guide sleeve.
2. The latch structure according to claim 1, wherein: The guide sleeve includes a first guide sleeve. The first guide sleeve is arranged to correspond to the position and size of the second pin hole of the outer column. The pin is inserted into the first guide sleeve.
3. The latch structure according to claim 1, wherein: The guide sleeve includes a second guide sleeve having a guide groove extending along the moving direction of the latch plate, and the rack is inserted into the guide groove of the second guide sleeve.
4. The latch structure according to claim 1, wherein: The driving assembly includes at least two brackets, wherein the brackets are used to be fixed to the transport box, and the pivot rod is arranged in the brackets and can pivot in the brackets.
5. The latch structure according to claim 1, wherein: The drive assembly further comprises a pawl, and the pivot rod is further provided with a ratchet, wherein the pawl is used to be fixed to the transport box and cooperate with the ratchet to enable the pivot rod to pivot in one direction; and / or The pivot rod is fixedly provided with a handle.
6. The latch structure according to claim 1, wherein: The latch structure further includes a tension spring, one end of which is fixedly connected to the latch plate, and the other end of which is used to be fixedly connected to the outer column. The tension spring exerts a pulling force on the latch plate in a direction toward the outer column.
7. The latch structure according to claim 1, wherein: The latch plate has an unlocked position, in which the pin is disengaged from the first pin hole and the second pin hole; The latch structure also includes a spring pin, and the pin column is provided with at least one third pin hole for inserting the spring pin, and the position of the third pin hole on the pin column is set so that the spring pin is inserted into the third pin hole at least when the latch plate is in the unlocked position.
8. The latch structure according to any one of claims 1 to 7, characterized in that: The latch plate includes at least two pins, which are spaced apart and arranged in parallel and fixedly connected to the same side of the connecting beam. Each of the pins is inserted into one of the guide sleeves.
9. The latch structure according to claim 8, characterized in that: The latch plate includes a first pin and a second pin; The first pin and the second pin are respectively inserted into different pin holes of the same telescopic column; or The first pin and the second pin are used to be inserted into the pin holes of different telescopic columns respectively.
10. A transport box, characterized in that: The transport box comprises: A telescopic column, the telescopic column comprising an inner column and an outer column, the outer column being sleeved on the outer side of the inner column, the inner column being provided with a first pin hole, the outer column being provided with a second pin hole, and the inner column being capable of axial movement relative to the outer column; The latch structure according to any one of claims 1 to 9, Wherein, the guide sleeve is fixedly connected to the outer layer column, and the pin can be inserted into or out of the first pin hole and the second pin hole.
11. The transport box according to claim 10, characterized in that: The inner column is provided with at least two first pin holes spaced apart from each other; and / or The outer column is provided with at least two second pin holes arranged at intervals.
12. The transport box according to claim 10, characterized in that The pivot rod is fixedly provided with a first rotating wheel, and the driving assembly further comprises an operating rod, the operating rod is fixedly provided with a second rotating wheel and a handle, and the first rotating wheel and the second rotating wheel are driven by a belt. Wherein, the height of the second rotating wheel is lower than that of the first rotating wheel.