CN115946987A - Lock assembly and pallet box - Google Patents

Abstract

The application discloses tool to lock subassembly and tray case. The lock assembly comprises a lock box, a lock rotating shaft and a lock handle; the lock box is provided with a first supporting wall and a second supporting wall, the first supporting wall and the second supporting wall form a handle mounting groove, and the lock box is provided with a shaft part supporting hole; the lock rotating shaft penetrates through the shaft part supporting hole and is provided with a lock hook; the lock handle is capable of swinging between a hooking position where the lock hook is hooked to the end wall and an unlocking position where the lock hook is separated from the end wall, and a maximum dimension between the lock handle and the outer side surface in a length direction of the lock case is smaller than a dimension of the side post in a width direction of the side wall. Therefore, the maximum size between the lock handle and the outer side face is smaller than the size of the side upright column in the width direction of the side wall, when the lock assembly is arranged on the side wall of the tray box, the half-folding door can be close to the side upright column as far as possible, the size of the half-folding door of the tray box in the width direction of the side wall can be as large as possible, and goods can be conveniently loaded and unloaded through the door opening of the side wall.

Description

Lock assembly and pallet box

Technical Field

The application relates to the container field, particularly to tool to lock subassembly and tray case.

Background

In the tray case including half folding door, the lateral wall is provided with the tool to lock subassembly. The tool to lock subassembly sets up in the upper end of the side stand of lateral wall. With the tray box in the assembled condition, the latch assembly is used to hook the end wall to connect the end wall and the side wall. The upper end of the side wall is provided with a door opening. The half-folding door is pivotally connected to the side wall for opening or closing the door opening.

The lock assembly includes a lock handle. The lock handle extends towards the center of the side wall in the width direction of the side wall to project out of the side post. Thus, to clear the lock handle. A space is provided between the door opening and the side pillar in the width direction of the side wall. Part of the lock handle is located in the space between the door opening and the side pillar.

Thus, the size of the door opening in the width direction of the side wall is small, and it is inconvenient to load and unload goods through the door opening.

To this end, the present application provides a lock assembly and pallet box to at least partially address the above-mentioned problems.

Disclosure of Invention

In this summary, concepts in a simplified form are introduced that are further described in the detailed description section. This summary of the application is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

To solve at least in part the above technical problem, the present application provides a lock assembly for connecting to a top end of a side pillar of a side wall of a pallet box for hooking an end wall of the pallet box, the lock assembly comprising:

the lock box is provided with a first supporting wall and a second supporting wall which are arranged at intervals along the length direction of the lock box so as to form a handle mounting groove, and the lock box is provided with a shaft part supporting hole with the axial direction parallel to the length direction of the lock box, and the shaft part supporting hole is positioned on the first supporting wall and the second supporting wall;

the locking rotating shaft is rotatably arranged in the shaft part supporting hole in a penetrating mode, and a locking hook is arranged at one end, extending out of the outer side face of the first supporting wall and far away from the second supporting wall, of the locking rotating shaft;

and the maximum size between the lock handle and the outer side surface is smaller than the size of the side column along the width direction of the side wall along the length direction of the lock box.

According to the tool to lock subassembly of this application, the maximum dimension between lock handle and the lateral surface is less than the setting of the size of the width direction along the lateral wall of side stand, and when the tool to lock subassembly set up in the lateral wall of tray case, along the width direction of lateral wall, half-folding door can be close to the side stand as far as possible, and the size of the width direction along the lateral wall of the half-folding door of tray case can be as big as possible, conveniently loads and unloads goods through the door opening of lateral wall.

Alternatively, with the lock handle in the hooked position, the lock handle does not project beyond the outer profile of the lock case.

Optionally, the lock box further comprises a handle mounting groove bottom wall located at the bottom of the handle mounting groove, the handle mounting groove bottom wall and the box outer face of the lock box are arranged at intervals, a handle mounting hole is formed in the handle mounting groove bottom wall, the lock handle is located at the hooking position, the lock handle is partially located in the handle mounting hole, and the box inner face of the lock handle is flush with the box inner face of the lock box.

Optionally, the lower end of the lock handle is provided with an operating portion, and in the case where the lock handle is located at the hooking position, there is a space between the operating portion and the bottom wall of the handle mounting groove.

Optionally, the lower end of the handle mounting groove extends to a side of the operation portion away from the outer side surface along the length direction of the lock case to constitute a handle operation portion.

Optionally, the lock case further has a third support wall and a fourth support wall spaced apart from each other in a length direction of the lock case to constitute a stopper mounting groove, the lock case further being provided with a stopper support hole having an axial direction parallel to an axial direction of the shaft portion support hole, the stopper support hole being located in the third support wall and the fourth support wall and communicating with the handle mounting groove,

the tool to lock subassembly still includes the pin, and the pin is along the axial direction in pin supported hole movably wears to locate the pin supported hole between the limiting position and the position of leaving, and the lock handle is provided with the spacing portion of pin, and the spacing end that is close to the lateral surface of the pin that is located limiting position sets up in the case outside of the part that is located the spacing portion of pin of the lock handle of hookup position to block the lock handle and swing towards the unblock position.

Optionally, the stopper support hole is located between the shaft portion support hole and a lower end of the lock handle in a height direction of the lock case, and/or

The third supporting wall and the fourth supporting wall are both located on one side, close to the second supporting wall, of the first supporting wall, and the stop lever limiting portion is located at one end, far away from the outer side face, of the lock handle.

Optionally, the tool to lock subassembly still includes the stop lever operating parts and the stop lever spring, the stop lever operating parts is connected to the stop lever, the stop lever operating parts is located stop lever mounting groove department, the stop lever is located under the condition of limiting position, the stop lever operating parts supports and connects to the third support wall, the stop lever is located to the stop lever spring housing, the one end of stop lever spring supports and connects to the stop lever operating parts, the other end of stop lever spring supports and connects to the fourth support wall to exert the effort that can make the stop lever move towards limiting position to the stop lever operating parts.

Optionally, at least one of the limiting end and the box inner surface of the lock handle is provided with an inclined surface for guiding the blocking rod, and one end of the inclined surface for guiding the blocking rod, which is close to the outer side surface, is closer to the box inner surface of the lock box relative to the other end, which is far away from the outer side surface, along the length direction of the lock box.

Optionally, the inclined surface of the guide bar comprises a bar guide inclined surface provided at the stopper end,

the lock box also has an operation limiting part located at the stop lever mounting groove, the operation limiting part comprises a first operation limiting part located on the upper side of the stop lever and a second operation limiting part located on the lower side of the stop lever, the stop lever operation part penetrates through the stop lever, the upper end of the stop lever operation part is located on the outer side of the first operation limiting part, the lower end of the stop lever operation part is located on the outer side of the second operation limiting part, and therefore the first operation limiting part and the second operation limiting part can block the stop lever operation part to rotate.

Optionally, a part of the lock handle is recessed towards the inner surface of the lock handle case to form a stopper rod limiting portion, and the limiting end of the stopper rod at the limiting position is disposed at the outer side of the case of the bottom wall of the stopper rod limiting portion at the hooking position to block the lock handle from swinging towards the unlocking position.

Alternatively, the operation restricting portion is configured to protrude toward the case outside of the lock case.

Alternatively, in the case where the lock handle is located at the hooking position, the outside of the case of the second operation limiting portion is located outside the case of the bottom wall of the pin limiting portion in the thickness direction of the lock case,

along the direction of height of lock box, the lower extreme of the spacing portion of pin is located the lower extreme department of the spacing portion of second operation, and the tip that is close to the lock handle of the spacing portion of second operation has finger guide inclined plane, and along the thickness direction of lock box, the one end that is close to the lateral surface on finger guide inclined plane is close to the case inner face of lock box more for the other end of keeping away from the lateral surface.

The application also provides a tray case, and the tray case includes:

a chassis;

an end wall;

the lateral wall, the lateral wall is provided with aforementioned tool to lock subassembly.

According to the tray case of this application, tray case includes foretell tool to lock subassembly, and the maximum dimension between lock handle and the lateral surface is less than the setting of the width direction's of edge lateral wall size of side stand, and when the tool to lock subassembly set up in tray case's lateral wall, along the width direction of lateral wall, half-folding door can be close to the side stand as far as possible, and the width direction's of edge lateral wall size of the half-folding door of tray case can be as big as possible, conveniently loads and unloads goods through the door opening of lateral wall.

Optionally, the pallet box further comprises a half-folding door comprising a latch assembly, the latch assembly being located at an upper corner of the half-folding door,

at least one side wall comprises a side wall middle cross beam and side upright columns, the side wall middle cross beam is located between two ends of the side wall along the height direction of the side wall, two ends of the side wall middle cross beam are respectively connected to the two side upright columns to form a door opening, the lower end of a lock box of the lock assembly is connected to the top ends of the side upright columns, one end of the half-folding door is connected to the side wall middle cross beam in a pivoting mode between a covering position covering the door opening and an opening position opening the door opening, the lock assembly is connected to the bolt lock assembly under the condition that the half-folding door is located at the covering position to fix the half-folding door at the covering position, and the half-folding door extends from one side upright column to the other side upright column along the width direction of the side wall.

Alternatively, a portion of the inner side portion of the lock case near the center of the side wall in the width direction of the side wall is extended and projected toward the center of the side wall to constitute a lock case coupling portion having a latch hole, an axial direction of which is parallel to a height direction of the side wall,

the bolt lock assembly comprises a bolt lock seat and a bolt rod, the bolt lock seat is provided with a bolt supporting hole, the axial direction of the bolt supporting hole is parallel to the height direction of the half-folding door, the bolt rod movably penetrates through the bolt supporting hole along the axial direction of the bolt hole, the half-folding door is located under the condition of covering and closing positions, the part of the bolt lock seat is located below the lock box connecting portion, and the bolt rod stretches into the bolt hole.

Optionally, the bolt pole includes first pole section and second pole section, the diameter of first pole section is greater than the diameter of second pole section, bolt supporting hole includes first hole section and second hole section, the internal diameter size of first hole section is greater than the internal diameter size of second hole section, bolt lock subassembly still includes the bolt spring, the second pole section is located and is located first hole section to the bolt spring housing, first hole section is worn to locate by first pole section, second hole section is worn to locate by the second pole section, the connection face of first pole section of one end butt of bolt spring and second pole section, the connection face of first hole section of other end butt of bolt spring and second hole section to exert the effort that makes first pole section stretch out first hole section to the bolt pole.

Optionally, the end facade of the end of bolt lock seat near the center of half folding door has a door handle mounting hole, door handle mounting hole intercommunication bolt supported hole, the outer peripheral face of bolt pole has bolt pole rack portion, bolt lock subassembly still includes door handle and door handle installation round pin, door handle is provided with door handle gear portion, door handle wears to locate door handle mounting hole, door handle rotationally is connected to bolt lock seat through door handle installation round pin, the axial direction of door handle installation round pin is on a parallel with the thickness direction of half folding door, door handle gear portion and bolt pole rack portion mesh, in order to drive the axial direction removal in bolt hole along the bolt pole.

Alternatively, a portion of the lock case coupling part near the center of the side wall extends upward in the width direction of the side wall to constitute a hooking upright wall, a space is provided between the hooking upright wall and the second support wall in the width direction of the side wall to constitute a door coupling groove, the lock case is provided with a door coupling groove notch communicated to an upper end of the door coupling groove,

the part of the seat body of the bolt lock seat extends upwards to form a vertical wall on the lock seat, the upper end of the vertical wall on the lock seat extends and protrudes along the width direction of the half-folding door away from the center of the half-folding door to form a top wall of the lock seat, the end part of the top wall of the lock seat, which is away from the vertical wall on the lock seat, extends and protrudes downwards to form a connecting hook head, a gap exists between the free end of the connecting hook head and the seat body along the height direction of the half-folding door to form a connecting gap,

under the condition that the half-folding door is positioned at the covering position, the part of the top wall of the lock seat is positioned in the gap of the door connecting groove, and the connecting hook head is positioned in the door connecting groove.

Optionally, the lock box further includes a lock box upper wall connected to the upper end of the second support wall, the lock box upper wall includes a connection groove upper wall located at the door connection groove, the connection groove upper wall is located above the hooking upright wall, and a space exists between the connection groove upper wall and the hooking upright wall in a height direction of the side wall to constitute a door connection groove gap communicating with the door connection groove.

Optionally, a portion of the top surface of the upper wall of the lock case extends upward to form a stacking column, the lower surface of the upper wall of the connecting groove is configured as a lower inclined surface of the upper wall of the connecting groove, the top surface of the top wall of the lock base is provided with an upper inclined surface of the connecting hook head, and the lower inclined surface of the upper wall of the connecting groove is located above the upper inclined surface of the connecting hook head and parallel to the upper inclined surface of the connecting hook head when the half-folding door is in the covering position.

Optionally, the lock case further comprises a door attachment slot bottom wall at the door attachment slot, the door attachment slot bottom wall being located at a case inner end of the lock case.

Drawings

In order that the advantages of the application will be readily understood, a more particular description of the application briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings. Understanding that these drawings depict only typical embodiments of the application and are not therefore to be considered to be limiting of its scope, the application will be described and explained with additional specificity and detail through the use of the accompanying drawings.

FIG. 1 is a perspective view of one orientation of a pallet box according to a preferred embodiment of the present application, wherein the pallet box is in an erected condition with a half-fold door in a closed position;

FIG. 2 is an enlarged partial view of the tray box of FIG. 1 taken in another direction, A, with the tray box in an erected position and the half-fold door in a closed position;

FIG. 3 is a perspective view of the tray case of FIG. 1 in another orientation with the tray case in an assembled state and the half-fold door in an open position;

FIG. 4 is a perspective view of the latch assembly of the pallet box of FIG. 1 with the lock handle in the hooked position and the stop lever in the limit position;

FIG. 5 is a perspective view of one orientation of a lock box of the lock assembly of the pallet box of FIG. 4;

FIG. 6 is a perspective view of another orientation of the lock box of the lock assembly of the pallet box of FIG. 5;

FIG. 7 is a perspective view of another orientation of the lock box of the lock assembly of the pallet box of FIG. 5;

FIG. 8 is a perspective view of one orientation of a lock handle of the lock assembly of the pallet box of FIG. 4;

FIG. 9 is a perspective view of another orientation of the lock handle of the lock assembly of the pallet box of FIG. 8;

FIG. 10 is a perspective view of a half-flap door of the pallet box of FIG. 1;

FIG. 11 is an enlarged partial view of the tray box of FIG. 10 at B of the half-folding door;

FIG. 12 is a schematic cross-sectional view of a partial enlarged view at B of the half-folding door of the tray box of FIG. 10; and

fig. 13 is a perspective view of a latch receptacle of the half-folding door of the tray box of fig. 10.

Description of the reference numerals

100: the chassis 110: chassis upright post

200: end wall 210: locking piece

211: the locking hole 220: end upright post

230: end upper beam 300: side wall

310: side uprights 320: half-folding door

321: door upper beam 322: door column

323: the door panel 324: door lower beam

330: half-hinge door hinge 340: door opening

350: side wall middle cross member 400: lock assembly

410: the latch hook 420: lock rotating shaft

430: the lock handle 431: stop lever limiting part

432: operation unit 433: lock handle guide ramp

434: stopper rod limiting part bottom wall 435: lock handle boss

436: handle sleeve portion 437: inclined plane of operation part

440: handle mounting pin 500: lock box

501: latch hook mounting groove 502: stacking column

503: stacking surface 504: gap

505: second guide slope 506 of half-folding door: outer side surface

510: handle mounting groove 511: first supporting wall

512: second support wall 513: shaft part support hole

514: handle mounting hole 515: upper wall of lock box

516: lock box lower wall 517: bottom wall of handle mounting groove

518: lower edge 520: mounting groove for stop lever

521: third support wall 522: fourth supporting wall

523: stopper support hole 524: first operation limiting part

525: second operation limiting portion 526: finger guide inclined plane

527: spring mounting groove 530: handle operating part

540: the door coupling groove 541: bottom wall of door connecting groove

542: connecting groove upper wall 543: lower inclined surface of upper wall of connecting groove

544: door connection slot notch 550: lock box connecting part

551: the latch hole 552: hook-jointed vertical wall

610: the catch bar 611: stop lever guide slope

620: the lever operation member 621: operating end of stop lever

630: the lever spring 700: latch lock assembly

701: half-folding door first guide slope 702: gap of connecting hook head

710: latch lock seat 711: connecting hook head

712: the connection notch 713: bolt support hole

714: connecting hook head upper inclined plane 715: bolt rod mounting hole

716: door handle mounting hole 717: door handle pin hole

718: rivet mounting groove 720: bolt rod

721: first pole segment 722: second pole segment

723: latch lever rack 724: first hole section

725: second bore section 726: seat body

727: latch seat upper standing wall 728: top wall of lock base

730: latch spring 740: door handle

741: door handle connecting portion 742: door handle operating part

743: door handle connection hole 744: door handle gear part

750: door handle mounting pin

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present application. It will be apparent, however, to one skilled in the art, that the embodiments of the present application may 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 embodiments of the present application.

Preferred embodiments of the present application will be described below with reference to the accompanying drawings. It is to be understood that the terms "upper", "lower", and the like are used herein for purposes of illustration only and are not to be construed as limiting.

Ordinal words such as "first" and "second" are referred to herein merely as labels, and do not have any other meaning, e.g., a particular order, etc.

In the following description, a detailed structure will be presented for a thorough understanding of embodiments of the present application. It is apparent that the implementation of the embodiments of the present application is not limited to the specific details familiar to those skilled in the art. The following detailed description of the preferred embodiments of the present application, however, the present application may have other embodiments in addition to these detailed descriptions.

The present application provides a lock assembly 400. The latch assembly 400 may be used with a pallet bin. When the locker assembly 400 is provided to the sidewall 300 of the tray case, the locker assembly 400 may be as small as possible in the width direction of the sidewall 300. In this way, the sidewall 300 may be provided with as large a door opening 340 as possible. The half-folding door 320 connected to the sidewall 300 for closing the door opening 340 may be located as close as possible to both side pillars 310 of the sidewall 300.

As shown in fig. 1 to 3, the pallet box includes a bottom plate 100, two end walls 200 and two side walls 300. The two end walls 200 are pivotally connected to both end portions of the chassis 100 in the first horizontal direction D1, respectively. The two side walls 300 are pivotally connected to two side portions of the chassis 100 in the second horizontal direction D2, respectively. Thus, the tray box has an assembled state and a folded state. When the tray box is in the folded state, the end walls 200 and the side walls 300 are both stacked above the bottom tray 100. In the assembled state of the pallet box, the plane of the end wall 200 is perpendicular to the first horizontal direction D1, and the plane of the side wall 300 is perpendicular to the second horizontal direction D2. With the tray box in the assembled state, the two end walls 200 are located inside the box in the second horizontal direction D2 of the two side walls 300.

Herein, the "inside of the case" means a side of a certain first member closer to the center of the chassis in the first direction in the case where the tray case is in the assembled state. The "case outside" refers to a side of the first member away from the center of the chassis in the first direction when the tray case is in the assembled state. For example, the inside of the side wall 300 in the second horizontal direction D2 is a side of the side wall 300 closer to the center of the chassis 100 in the second horizontal direction D2 when the tray box is in the erected state. The outside of the side wall 300 in the second horizontal direction D2 is a side of the side wall 300 away from the center of the chassis 100 in the second horizontal direction D2 when the tray box is in the erected state.

The "box inner face" refers to a surface of the first member near the center of the chassis 100 in the first direction in the case where the pallet box is in the assembled state. "out of the box" means the surface of the first member away from the center of the chassis 100 in the first direction with the tray box in the erected condition. For example, the inner surface of the side wall 300 in the second horizontal direction D2 is a surface of the side wall 300 near the center of the chassis 100 in the second horizontal direction D2 when the tray box is in the erected state. The outside of the side wall 300 in the second horizontal direction D2 is a surface of the side wall 300 away from the center of the chassis 100 in the second horizontal direction D2 in the case where the tray box is in the erected state.

Referring to fig. 1 to 9, the lock assembly 400 includes a lock case 500, a lock rotation shaft 420 and a lock handle 430. The latch rotating shaft 420 is provided with a latch hook 410. The latch assembly 400 may be disposed on the sidewall 300. The end wall 200 includes a locking aperture 211. With the tray housing in the assembled state, the latch hooks 410 can be rotated into the latch holes 211 to connect the end wall 200 and the side wall 300. The lock assembly 400 is disposed on the side wall 300, and when the tray box is in an assembled state, the width direction of the side wall 300 is parallel to the first horizontal direction D1, the height direction of the side wall 300 is parallel to the height direction D3 of the chassis 100, the thickness direction of the side wall 300 is parallel to the second horizontal direction D2, the height direction of the lock box 500 is parallel to the height direction D3 of the chassis 100, the length direction of the lock box 500 is parallel to the first horizontal direction D1, the thickness direction of the lock box 500 is parallel to the second horizontal direction D2, the width direction of the end wall 200 is parallel to the second horizontal direction D2, the height direction of the end wall 200 is parallel to the height direction D3 of the chassis 100, and the thickness direction of the end wall 200 is parallel to the first horizontal direction D1.

As shown in fig. 4 to 9, the lock box 500 has a first supporting wall 511, a second supporting wall 512 and a lock box upper wall 515. The length direction of the first support wall 511 and the length direction of the second support wall 512 both extend in the height direction of the lock case 500. The upper end of the first support wall 511 and the upper end of the second support wall 512 are both connected to the lock case upper wall 515. The first and second support walls 511 and 512 are spaced apart along the length of the lock case 500. Thus, the lock case 500 constitutes a handle installation recess 510 at the interval between the first and second support walls 511 and 512. When the lock box 500 is disposed on the side wall 300, the first supporting wall 511 is located on one side of the second supporting wall 512 away from the center of the side wall 300 along the width direction of the side wall 300.

The upper portions of the first and second support walls 511 and 512 each have an axle portion support hole 513. The shaft portion support hole 513 penetrates the first support wall 511 and the second support wall 512. The axial direction of the shaft portion support hole 513 is parallel to the length direction of the lock case 500. The locking rotation shaft 420 is rotatably inserted into the shaft supporting hole 513. The surface of the first support wall 511 remote from the second support wall 512 is the outer side 506. An end of the locking rotation shaft 420 protruding out of the outer side surface 506 of the first support wall 511 is provided with a locking hook 410. When the lock case 500 is disposed on the sidewall 300, the hook end of the lock hook 410 protrudes out of the inner surface of the case along the second horizontal direction D2 of the sidewall 300. The lock case upper wall 515 extends to the case outside of the first support wall 511 in the length direction of the lock case 500. Thus, the first support wall 511 and the lock case upper wall 515 constitute the lock hook installation groove 501. Portions of the shackle 410 are positioned within the shackle mounting groove 501.

With continued reference to fig. 4-9, the upper end of the lock handle 430 is connected to the lock spindle 420. In this way, the lock handle 430 can be rotated between the hooking position and the unlocking position, thereby rotating the lock rotating shaft 420 and thus rotating the lock hook 410. The latch assembly 400 is disposed on the side wall 300, and when the tray box is in the assembled state and the latch handle 430 is in the hooking position, the hook head of the latch hook 410 enters the latch hole 211 of the end wall 200 to connect the end wall 200 and the side wall 300. When the latch assembly 400 is disposed on the side wall 300 and the tray case is in the assembled state, and the latch handle 430 is in the unlocked position, the latch hook 410 is separated from the end wall 200 to unlock the end wall 200, thereby releasing the connection between the end wall 200 and the side wall 300.

Referring to fig. 2 and 4, a maximum dimension H1 between the lock knob 430 and the outer side 506 in a length direction of the lock case 500 is smaller than a dimension H2 of the side post 310 in a width direction of the side wall 300. Thus, the length of the lock case 500 along the length direction of the lock case 500 is small, and when the locker module 400 is used in a tray box having the half-folding door 320, the two side pillars 310 of the side wall 300 may directly constitute the door opening 340 of the side wall 300, the half-folding door 320 for covering the door opening 340 may be located as close to the side pillars 310 as possible, and the size of the half-folding door 320 along the width direction of the side wall 300 may be as large as possible, thereby facilitating loading and unloading of goods.

In this embodiment, the maximum dimension H1 between the lock handle 430 and the outer side surface 506 is smaller than the dimension H2 of the side pillar 310 in the width direction of the side wall 300, so that when the lock assembly 400 is installed on the side wall 300 of the tray box, the half-folding door 320 can be as close to the side pillar 310 as possible in the width direction of the side wall 300, and the dimension of the half-folding door 320 of the tray box in the width direction of the side wall 300 can be as large as possible, thereby facilitating loading and unloading of goods through the door opening 340 of the side wall 300.

Preferably, with the lock handle 430 in the hooked position, the lock handle 430 is located within the lock box 500 and does not protrude beyond the outer profile of the lock box 500. Therefore, the pallet box in the assembled state can be conveniently transported.

Preferably, as shown in fig. 4, 8 and 9, the upper end of the lock handle 430 has a handle sleeve portion 436. The lock handle 430 has an operating portion 432 at a lower portion thereof. The handle sleeve portion 436 has a circular tube structure. The handle sleeve portion 436 is located in the space between the first support wall 511 and the second support wall 512. The lock rotation shaft 420 is inserted through the handle bushing part 436. The handle bushing part 436 is provided with a pin mounting hole having an axial direction perpendicular to the axial direction of the handle bushing part 436. The lock assembly 400 also includes a handle mounting pin 440. The handle mounting pin 440 is preferably a resilient cylindrical pin. The handle mounting pin 440 is inserted into the pin mounting hole and then inserted through the lock rotation shaft 420 to connect the handle bushing part 436 to the lock rotation shaft 420, thereby connecting the lock handle 430 to the lock rotation shaft 420.

Referring to fig. 4 to 7, the lock case 500 further has a handle mounting groove bottom wall 517 at the bottom of the handle mounting groove 510. The handle mounting groove bottom wall 517 is connected to the inside face of the first support wall 511 in the thickness direction of the lock case 500, the inside face of the second support wall 512 in the thickness direction of the lock case 500, and the inside face of the lock case upper wall 515 in the thickness direction of the lock case 500 to constitute a bottom wall of the handle mounting groove 510. The handle mounting groove bottom wall 517 has a space from the case outside of the lock case 500 in the thickness direction of the lock case 500. Thus, the strength of the lock case 500 is large.

As shown in fig. 4, with the lock handle 430 in the hooked position, the case outer face of the operating portion 432 in the thickness direction of the lock case 500 is substantially flush with the case outer face of the lock case 500 in the thickness direction of the lock case 500. Thus, the pallet box in the assembled state is convenient to transport.

The operating portion 432 and the handle mounting groove bottom wall 517 are disposed at intervals in the thickness direction of the lock case 500 to constitute an operating space in which the operating portion 432 is operated by fingers. Thus, the operation part 432 is convenient to operate.

Returning to fig. 2, end wall 200 includes locking elements 210, end studs 220, and end upper beams 230. End posts 220 are located at both ends of end wall 200 along the width of end wall 200. The latch 210 is connected to the upper end of the end post 220. The latch 210 is also connected to both ends of the end upper beam 230. The locking member 210 has a locking hole 211 on the outside of the case in the second horizontal direction D2. When the tray box is in the assembled state, the opening of the lock hole 211 faces the side wall 300. Sidewall 300 also includes side uprights 310. Side pillars 310 are located at both ends of the side wall 300 in the width direction of the side wall 300. The lower wall of the lock case 500 is connected to the upper end of the side post 310. When the pallet box is in the assembled state, the end pillar 220 is located inside the box in the second horizontal direction D2 of the side pillar 310.

When the tray box is in the assembled state, the operating portion 432 of the latch handle 430 is pulled to rotate the hook head of the latch hook 410 into the latch hole 211, so that the end wall 200 is connected to the side wall 300, or the hook head is separated from the latch hole 211, so that the end wall 200 is disconnected from the side wall 300.

As shown in fig. 4 and 5, the lock box 500 also has a lock box lower wall 516 located at the lower end of the lock box 500. Thus, the strength of the lock case 500 is large. The upper end of the lock handle 430 is located on the underside of the lock case upper wall 515. The lower end of the lock handle 430 is located on the upper side of the lock case lower wall 516. The upper end of the lock handle 430 is located near the lock box upper wall 515. The lower end of the lock handle 430 is located adjacent the lock box lower wall 516. Thus, the length of the lock handle 430 may be as long as possible to reduce the operating force required to rotate the lock handle 430.

With continued reference to fig. 4 and 5, the lock assembly 400 further includes a stop lever 610. The lock box 500 also has a third support wall 521 and a fourth support wall 522. The third support wall 521 and the fourth support wall 522 are both located below the second support wall 512. The upper end of the third support wall 521 and the upper end of the fourth support wall 522 are both connected to the lower end of the second support wall 512. The third support wall 521 is located on a side of the fourth support wall 522 adjacent to the outer side surface 506 along the length of the lock case 500. The third support wall 521 and the fourth support wall 522 are located on a side of the first support wall 511 close to the second support wall 512 along the length direction of the lock case 500. The third supporting wall 521 and the fourth supporting wall 522 are spaced apart from each other along the length direction of the lock case 500. In this way, the lock case 500 constitutes the bar installation groove 520 at the interval between the third and fourth support walls 521 and 522.

The lower end of the third support wall 521 is located above the lower end of the first support wall 511 in the height direction of the lock case 500. The lower end of the first support wall 511 is connected to one end of the lock case lower wall 516. The lower end of the fourth support wall 522 is connected to the other end of the lock case lower wall 516. Thus, the first support wall 511, the lock case upper wall 515, the second support wall 512, the fourth support wall 522 and the lock case lower wall 516 form a circumferentially closed structure. The case outer face of the first support wall 511 in the thickness direction of the lock case 500, the case outer face of the lock case upper wall 515 in the thickness direction of the lock case 500, the case outer face of the second support wall 512 in the thickness direction of the lock case 500, the case outer face of the third support wall 521 in the thickness direction of the lock case 500, and the case outer face of the fourth support wall 522 in the thickness direction of the lock case 500 are flush with the case outer face of the lock case lower wall 516 in the thickness direction of the lock case 500. The lower end of the lever installation groove 520 is communicated to the handle installation groove 510. Thus, the third supporting wall 521 is a partition wall of the handle mounting groove 510 and the lever mounting groove 520. That is, the third support wall 521 is a groove wall of both the handle mounting groove 510 and the bar mounting groove 520.

As shown in fig. 4 and 5, the third and fourth support walls 521 and 522 are each provided with a stopper support hole 523. The stopper support hole 523 penetrates the third support wall 521 and the fourth support wall 522. The axial direction of the stopper support hole 523 is parallel to the length direction of the lock case 500. The blocking rod 610 penetrates through the blocking rod support hole 523. Thus, the stopper 610 can move between the limit position and the escape position in the axial direction of the stopper support hole 523. The end of the stop lever 610 close to the first support wall 511 is a limit end. With the lock handle 430 in the hooking position, when the lever 610 is in the restricting position, the restricting end of the lever 610 protrudes out of the third support wall 521 and enters the handle installation groove 510. At this time, the stopper end is located outside the case in the thickness direction of the lock case 500 of the stopper portion bottom wall 434 of the lock handle 430 described later. Thereby, the lock handle 430 can be blocked from leaving the hooking position. With the stop lever 610 in the off position, the limit end is away from the lock release handle 430. At this time, the lock handle 430 can swing.

With continued reference to fig. 4 and 5, the lock assembly 400 further includes a lever operating member 620 and a lever spring 630. The axial direction of the stop lever operating member 620 is perpendicular to the axial direction of the stop lever 610. The lever operating member 620 is coupled to the lever 610. Specifically, the lever operating member 620 is preferably a hexagon socket head cap screw. The stop lever 610 is provided with a threaded through hole. The axial direction of the threaded through-hole is perpendicular to the axial direction of the stopper rod 610. The lever operating member 620 is screwed to the threaded through hole. The lever operating member 620 is located at the lever mounting groove 520. With the lever 610 in the limit position, the lever operating member 620 abuts the third support wall 521. In this way, the third support wall 521 can block the lever operating member 620 from continuing to move toward the first support wall 511, so that the lever 610 can be prevented from moving away from the fourth support wall 522. Further, the lever 610 may be moved in the axial direction of the lever support hole 523 by dialing the lever operation member 620.

The bar spring 630 may be a cylindrical helical compression spring. The stop lever spring 630 is sleeved on the stop lever 610. One end of the lever spring 630 abuts the lever operating member 620 and the other end abuts the fourth support wall 522. The bar spring 630 is in a compressed state. Thus, the lever spring 630 can apply a force to the lever operating member 620. This force can move the stop lever 610 toward the limit position.

As shown in fig. 4 and 5, the bar installation groove 520 further has an operation limiting part. The operation limiting portion includes a first operation limiting portion 524 and a second operation limiting portion 525. The first operation limiting part 524 is located at an upper side of the lever 610. The second operation limiting portion 525 is located at a lower side of the lever 610. The upper end of the lever operating member 620 extends to the upper side of the lever 610 after passing through the lever 610. The upper end of the lever operating member 620 is located outside the first operation restricting portion 524 in the thickness direction of the lock case 500. The lower end of the stopper operating piece 620 is located outside the case of the second operation limiting portion 525 in the thickness direction of the lock case 500. Specifically, the lower end of the lever operating member 620 is a lever operating end 621. The diameter of the lever operating end 621 is larger than the diameter of the rest of the lever operating member 620. The lever operating end 621 is close to the second operation limiting portion 525, and the upper end of the lever operating member 620 is close to the first operation limiting portion 524. In this way, the rotation angle of the stopper operating member 620 can be reduced, the stopper operating member 620 is prevented from rotating to protrude to the outside of the case of the lock case 500 in the thickness direction of the lock case 500, and the later stopper guide slope 611 can be made to face the outside of the case of the lock case 500 in the thickness direction of the lock case 500.

Specifically, the lever operating member 620 is a hexagon socket head cap screw. The bolt head of the hexagon socket head cap screw is the stop lever operation end 621. The outer peripheral surface of the bolt head is close to the second operation limiting portion 525, and the outer peripheral surface of the threaded end portion of the hexagon socket head screw is close to the first operation limiting portion 524.

It should be noted that, herein, "close" refers to a range of a minimum distance between two members of 0mm to 5mm. For example, the second member being close to the third member means that the second member abuts against the third member (the minimum distance between the second member and the third member is 0 mm), or the interval between the second member and the third member is less than or equal to 5mm and greater than 0mm.

With continued reference to fig. 4 and 5, the first operation limiting portion 524 and the second operation limiting portion 525 are spaced apart from each other along the height direction of the lock box 500. A spring installation groove 527 is concavely formed in a portion of the lock case 500 outside the case in a thickness direction of the lock case 500. The spring installation groove 527 is located between the first operation limiting part 524 and the second operation limiting part 525. The spring installation groove 527 provides an installation space for the bar spring 630. Portions of the bar spring 630 are located in the spring mounting groove 527. The first operation limiting part 524, the spring installation groove 527 and the second operation limiting part 525 together form a bottom wall of the stop lever installation groove 520. Thus, the installation of the bar spring 630 is facilitated.

As shown in fig. 4, 8 and 9, the portion of the lock handle 430 outside the case in the thickness direction of the lock case 500 is recessed toward the case inner surface of the lock handle 430 in the thickness direction of the lock case 500 to form a stopper 431. The stopper 431 is located at an end of the lock handle 430 away from the first support wall 511 in the axial direction of the handle bushing part 436. The stopper portion 431 is located between the handle bushing portion 436 and the operating portion 432 in the height direction of the lock case 500.

The stopper 431 is open toward the outside of the case of the lock handle 430 in the thickness direction of the lock case 500 and toward the fourth support wall 522. The stopper 431 has a stopper bottom wall 434. The stopper bottom wall 434 is located at one end of the lock handle 430 near the inside of the case of the lock handle 430 in the thickness direction of the lock case 500. The stopper support hole 523 is located between the shaft portion support hole 513 and the operating portion 432 in the height direction of the lock case 500. Thus, the stopper 610 is located below the lock rotating shaft 420 in the height direction of the lock case 500. The stopper 610 is located at the middle of the lock handle 430 in the height direction of the lock case 500. When the lock handle 430 is in the hooking position and the stopper 610 is in the stopper position, the stopper end of the stopper 610 is located on the outside of the case in the thickness direction of the lock case 500 of the stopper bottom wall 434.

The stopper end of the lever 610 has a lever guide slope 611 (an example of a slope guiding the lever). In the length direction of the lock case 500, an end of the stopper guide slope 611 close to the first support wall 511 is closer to the case inner face of the lock case 500 in the thickness direction of the lock case 500 than an end far from the first support wall 511. The stopper guide slope 611 faces the outside of the case of the lock case 500 in the thickness direction of the lock case 500. The box inner surface of the bar stopper bottom wall 434 has a lock handle guide slope 433 (another example of a slope for guiding the bar). The position of the lock handle guide slope 433 corresponds to the position of the stopper guide slope 611. In the thickness direction of the lock case 500, an end of the lock handle guide slope 433 close to the first support wall 511 is closer to the inside face of the case of the lock case 500 in the thickness direction of the lock case 500 than an end far from the first support wall 511. Thus, in the case where the lock handle 430 is located at the hooking position, the inclination direction of the lock handle guide slope 433 is the same as that of the stopper guide slope 611.

When the lock handle 430 is in the hooking position, the lower end of the stopper 431 and the lower end of the second operation limiting portion 525 are substantially flush with each other in the height direction of the lock case 500. The lower end of the stopper 431 is located below the lower end of the third support wall 521. The lower end of the stopper 431 is spaced apart from the lower end of the third support wall 521. Thereby providing space for the finger to operate the lever operating member 620.

As shown in fig. 4 and 5, the operation restricting portion protrudes from the handle mounting groove bottom wall 517 toward the case outer surface of the lock case 500 in the thickness direction of the lock case 500. Thus, the strength of the lock case 500 at the operation restricting portion is large.

When the lock handle 430 is located at the hooking position, the outside of the second operation limiting portion 525 in the thickness direction of the lock case 500 is located outside the case of the stopper limiting portion bottom wall 434 in the thickness direction of the lock case 500. The end of the second operation limiting portion 525 near the lock handle 430 has a finger guide slope 526. One end of the finger guide slope 526 near the first support wall 511 is closer to the case inner face of the lock case 500 in the thickness direction of the lock case 500 than the other end in the length direction of the lock case 500. When the finger operates the lever operating member 620, the finger guide slope 526 can guide the movement of the finger, and the second operation limiting portion 525 is prevented from blocking the finger.

With continued reference to fig. 4 and 5, the lower end of the handle mounting groove 510 extends along the length direction of the lock case 500 to the side of the operating portion 432 away from the outer side surface 506 to form a handle operating portion 530. The handle mounting groove bottom wall 517 extends to a side of the operating portion 432 away from the outer side surface 506 in the longitudinal direction of the lock case 500 to constitute a bottom wall of the handle operating portion 530. Therefore, an operation space is provided for fingers to extend into the space between the operation part 432 and the bottom wall 517 of the handle mounting groove, and the operation is convenient.

Referring to fig. 4, the operation steps for opening the lock assembly 400 are: extending an index finger or middle finger from the handle operating portion 530 into the space between the operating portion 432 and the handle mounting groove bottom wall 517; the index finger or middle finger is hooked on the operation portion 432; the thumb is inserted into the lower end of the stop lever limiting part 431, then the thumb points to the direction far away from the first supporting wall 511 to push the stop lever operating end 621, so that the stop lever 610 leaves the limiting position, the limiting end retracts into the third supporting wall 521, the stop lever 610 stops the lock handle 430, and the stop lever spring 630 is compressed in the process; the index finger or middle finger then lifts the operating portion 432 to rotate the latch hook 410 out of the latch aperture 211, completing the opening of the latch assembly 400.

Referring to fig. 4, the operation steps of the locking assembly 400 are as follows: pressing the operating part 432 to rotate the lock handle 430, and further, the lock handle guide slope 433 abuts against the stopper guide slope 611 of the stopper 610; as the operation part 432 is continuously pressed, the stopper end of the stopper 610 moves away from the lock knob 430 by the interaction of the lock knob guide slope 433 and the stopper guide slope 611, and the stopper spring 630 is compressed. After the bottom wall 434 of the stop lever limiting portion of the lock handle 430 passes over the stop lever 610, the stop lever 610 moves to the limiting position under the action of the stop lever spring 630, so that the limiting end extends out of the third supporting wall 521 and enters the stop lever limiting portion 431, thereby blocking the bottom wall 434 of the stop lever limiting portion and completing the automatic locking of the lock assembly 400.

Since the pallet box provided with the lock assembly 400 locks the lock assembly 400 when it is erected (the pallet box is in an erected state), the lock assembly 400 is opened after the unloading is completed to fold the pallet box (so that the pallet box is in a folded state). Both locking and unlocking the lock assembly 400 and 400 are performed without cargo in the pallet box. Thus, neither the side walls 300 nor the end walls 200 of the pallet box are subjected to the cargo's outward bulging force when the latch assembly 400 is locked and when the latch assembly 400 is unlocked. The operating force required to lock the lock assembly 400 and unlock the lock assembly 400 need not be significant. The lock handle 430 is configured to accommodate both locking and unlocking operations of the lock assembly 400 and 400.

As shown in fig. 4 to 9, a portion of the handle mounting groove bottom wall 517 is provided with a handle mounting hole 514. The handle mounting hole 514 is located at the interval between the first and second support walls 511 and 512. The handle mounting hole 514 penetrates the lock case 500. The lower edge 518 of the handle mounting hole 514 is located at the lower end of the second operation limiting portion 525 in the height direction of the lock case 500. With the lock handle 430 in the hooked position, portions of the handle sleeve portion 436 and portions of the stop lever stop bottom wall 434 are positioned within the handle mounting aperture 514. With the lock handle 430 located at the hooking position, the inside surface of the case of the lock handle 430 in the thickness direction of the lock case 500 is flush with the inside surface of the case of the lock case 500 in the thickness direction of the lock case 500. Thus, in the case where the thickness of the lock case 500 is small, it is possible to provide a sufficient installation space for the lock handle 430 so that the size of the lock handle 430 in the thickness direction of the lock case 500 is as large as possible, thereby securing the strength of the lock handle 430.

When the lock handle 430 is in the hook position, the lower edge 518 of the handle attachment hole 514 abuts the lock handle 430, and the lock handle 430 is prevented from rotating in the direction of the inside of the case of the lock case 500 in the thickness direction of the lock case 500.

As shown in fig. 1, 2, 3 and 10, the tray box includes a half-folding door 320. At least one of the sidewalls 300 is provided with a half-folding door 320. The side wall 300 provided with the half-folding door 320 further includes a side wall middle cross member 350. The length direction of the cross member 350 in the side wall is parallel to the width direction of the side wall 300. Both ends of the cross member 350 in the sidewall are connected to the middle portions of the two side pillars 310, respectively, in the height direction of the sidewall 300. Thus, the side wall center cross member 350 and the portions of the two side pillars 310 located above the side wall center cross member 350 enclose the door opening 340.

As shown in fig. 10, half-folding door 320 includes door upper beam 321, door pillar 322, and deadbolt assembly 700. The length direction of the door upper beam 321 is parallel to the width direction of the half-folded door 320. The length direction of the door pillar 322 is parallel to the height direction of the half-folding door 320. Deadbolt lock assembly 700 is two. Deadbolt lock assembly 700 is located at an upper corner of half-folding door 320. Deadbolt assembly 700 is attached to an upper end of door stud 322. The latch assembly 700 is also connected to the end of the door upper beam 321.

Referring to fig. 1, 3 and 10, the half-folding door 320 further includes a door lower beam 324. The length direction of the door lower beam 324 is parallel to the width direction of the half-folded door 320. The side wall 300 also includes two half-hinge hinges 330. The upper end of the half-folding door hinge 330 is connected to the lower end of the door pillar 322 and the end of the door sill 324. The lower end of the half-hinge 330 is connected to the end of a cross-member 350 in the side wall. Thus, the half-folding door 320 can be rotated between a closed position to close the door opening 340 and an open position to open the door opening 340. In the case where the half-folding door 320 is connected to the side wall 300, the width direction of the half-folding door 320 is parallel to the width direction of the side wall 300.

As shown in fig. 1, 3, and 10, the door pillar 322 and the side pillar 310 of the half-folding door 320 are adjacent to each other in the width direction of the side wall 300. The dimension of the half-folding door 320 in the width direction of the half-folding door 320 is slightly smaller than the minimum distance between the two side pillars 310. Thus, the half-flap 320 extends from one side pillar 310 to the other side pillar 310 along the width of the side wall 300. Thus, the half-folded door 320 is nearly fully open except for a portion of the lock box 500 of the lock assembly 400 that protrudes into the door opening 340.

As shown in fig. 1 to 3, 5, 6, 11 to 13, the lock case 500 is connected to the top end of the side post 310. An inner side portion of the lock case 500 near the center of the side wall 300 in the width direction of the side wall 300 is extended and projected toward the center of the side wall 300 to constitute a lock case connection portion 550. Thus, the lock box 500 forms a notch 504 below the lock box connection portion 550. The lock case connection portion 550 has a latch hole 551. The axial direction of the latch hole 551 is parallel to the height direction of the lock case 500.

Deadbolt assembly 700 includes a deadbolt lock housing 710 and a deadbolt lever 720. Latch lock housing 710 includes a housing body 726. The holder body 726 has a latch support hole 713. The axial direction of the latch support hole 713 is parallel to the height direction of the half-folding door 320. The latch lever 720 is inserted through the latch support hole 713. The latch lever 720 is movable in the latch support hole 713. When the half-folding door 320 is in the closed position, the portion of the latch holder 710 having the latch support hole 713 is positioned in the notch 504, and the latch rod 720 is inserted into the latch hole 551. In this way, the upper end of the half-folding door 320 may be attached to the sidewall 300 to secure the half-folding door 320 in the closed position.

As shown in fig. 11 to 13, the latch lever 720 is a stepped lever including a first lever section 721 and a second lever section 722. The upper portion of the latch rod 720 is a first rod segment 721. The lower portion of the latching lever 720 is a second lever segment 722. The diameter of the first pole segment 721 is greater than the diameter of the second pole segment 722. The latch support hole 713 is a stepped hole including a first hole section 724 and a second hole section 725. The upper portion of the latch support hole 713 is a first hole section 724. The lower portion of the pin support hole 713 is a second hole section 725. The inner diameter of the first bore section 724 is greater than the inner diameter of the second bore section 725. Deadbolt lock assembly 700 also includes a deadbolt spring 730. The latch spring 730 is disposed around the second rod section 722. The first rod segment 721 is disposed through the first bore segment 724. A portion of the second rod segment 722 is disposed through the first bore segment 724 and another portion is disposed through the second bore segment 725. Latch spring 730 is located within first bore section 724. One end of the latch spring 730 abuts the connecting surfaces of the first and second pole segments 721, 722 and the other end of the latch spring 730 abuts the connecting surfaces of the first and second bore segments 724, 725. Latch spring 730 is in a compressed state. The latch spring 730 can apply a force to the latch lever 720 such that the upper end of the first lever segment 721 extends out of the latch support hole 713.

With continued reference to fig. 11-13, along the width direction of the half-folding door 320, the seat body 726 has a door handle mounting hole 716 on the end elevation near the center of the half-folding door 320. The door handle mounting hole 716 extends in the width direction of the half-folded door 320 to communicate with the latch pin support hole 713. The seat body 726 is provided with a door handle pin hole 717. The axial direction of the door handle pin hole 717 is parallel to the thickness direction of the half flap 320. The door handle pin hole 717 is located at the door handle mounting hole 716 to communicate with the door handle mounting hole 716.

A portion of the outer peripheral surface of the first segment 721 of the latch rod 720 has a latch rod rack portion 723. Deadbolt assembly 700 further includes a door handle 740 and a door handle mounting pin 750. The door handle 740 is a plate member. The door handle 740 has a door handle connection part 741 at a middle portion thereof. The door handle connecting part 741 has a door handle connecting hole 743. The axial direction of the door handle attachment hole 743 is parallel to the thickness direction of the half flap 320. The door handle connection part 741 is located in the door handle mounting hole 716. The door handle mounting pin 750 is inserted through the door handle pin hole 717 and the door handle connecting hole 743. Thus, the door handle connection part 741 can rotate about the door handle mounting pin 750.

A door handle gear portion 744 is provided on one side of the door handle connecting portion 741, which is away from the center of the half-folding door 320, in the width direction of the half-folding door 320. The door handle gear portion 744 meshes with the latch lever rack portion 723. A door handle operating part 742 is provided on the other side of the door handle connecting part 741 near the center of the side wall 300 in the width direction of the half-folded door 320. Thus, the door handle operation part 742 is rotated to rotate the door handle connection part 741. In this process, door handle gear portion 744 and latch rod rack portion 723 cooperate to drive latch rod 720 up and down (in the axial direction of latch support hole 713).

Referring to fig. 2, 11 to 13, the operation steps of opening the half-folding door 320 are as follows: holding the door handle operating portion 742 and the door upper beam 321 of one latch lock assembly 700 with one hand, and holding the door handle operating portion 742 and the door upper beam 321 of the other latch lock assembly 700 with the other hand; both hands rotate the door handle operating part 742 toward the door upper beam 321 to move the latch lever 720 downward; when door handle 740 abuts the upper edge of door handle mounting hole 716, door handle 740 stops rotating and latch lever 720 stops moving downward. At this time, the latch lever 720 is withdrawn from the latch hole 551; the half-folding door 320 is then turned downward, completing the opening of the half-folding door 320. After the half-folding door 320 is opened, the upper door beam 321 of the half-folding door 320 is positioned below the middle cross beam 350 of the side wall, and the length direction of the door pillar 322 is parallel to the height direction of the side wall 300. At this time, the latch lever 720 is reset to extend out of the latch supporting hole 713 by the latch spring 730. Note that the maximum distance between the door handle operating portion 742 and the door upper beam 321 is such that they can be held simultaneously by one hand.

Referring to fig. 2, 11 to 13, the operation steps of closing the half-folding door 320 are as follows: lifting up the door upper beam 321 of the half-folding door 320 to make the latch lever 720 abut against the lock case connection 550; holding the door handle operating portion 742 and the door upper beam 321 of one latch lock assembly 700 with one hand, and holding the door handle operating portion 742 and the door upper beam 321 of the other latch lock assembly 700 with the other hand; both hands rotate the door handle operating part 742 toward the door upper beam 321 to move the latch lever 720 downward; when door handle 740 abuts the upper edge of door handle mounting hole 716, door handle 740 stops rotating and latch lever 720 stops moving downward. At this time, the first rod section 721 of the latch rod 720 is retracted into the latch support hole 713, and then the half-folding door 320 is rotated until the length direction of the door pillar 322 is parallel to the height direction of the side wall 300 and the door upper rail 321 is positioned above the side wall middle cross rail 350. Then both hands release door handle operating portion 742, latch rod 720 moves upward under the action of latch spring 730, and latch rod rack portion 723 drives door handle gear portion 744 to rotate. When door handle 740 abuts the lower edge of door handle mounting hole 716, door handle 740 stops rotating and latch lever 720 stops moving. At this time, the latch rod 720 is inserted into the latch hole 551, completing the closing of the half-folding door 320.

It will be appreciated that in an embodiment not shown, a guide slope may be provided on the inner face of the box in the thickness direction of the half-folding door at the upper end of the first pole segment. A guide slope is provided at the lower end of the lock case connecting portion outside the case in the thickness direction of the lock case. Therefore, when the half-folding door is closed, only the half-folding door needs to be rotated, when the guide inclined plane of the first rod section is abutted to the guide inclined plane of the lock box connecting part, the bolt rod moves downwards under the matching of the guide inclined plane of the first rod section and the guide inclined plane of the lock box connecting part, and the bolt spring is compressed; when the bolt rod is aligned with the bolt hole, the bolt rod moves upwards to be inserted into the bolt hole under the action of the bolt spring, and the semi-folding door is automatically closed. No operation of the latch lock assembly is required. At this time, the operation step of opening the half-folding door is not changed.

As shown in fig. 5 to 7, in the height direction of the lock case 500, an end of the lock case connection portion 550 remote from the first support wall 511 is extended and projected upward to constitute a hooking standing wall 552. A space exists between the hooking standing wall 552 and the second support wall 512 along the length of the lock case 500. In this way, the lock case 500 constitutes the door coupling groove 540 at the interval between the hooking standing wall 552 and the second support wall 512. The lock case 500 is further provided with a door coupling groove gap 544 coupled to an upper end of the door coupling groove 540.

Specifically, along the width direction of the side wall 300, a portion of the lock case upper wall 515 near the center of the side wall 300 is a connection groove upper wall 542. The coupling groove upper wall 542 is located at the door coupling groove 540 along the length direction of the lock case 500. The door coupling groove 540 is positioned above the blocking lever mounting groove 520 in the height direction of the lock case 500. A space exists between the top surface of the lock case coupling portion 550 and the coupling slot upper wall 542 to form a door coupling slot gap 544. The door coupling slot 540 also has a door coupling slot bottom wall 541.

As shown in fig. 3, 5, 7, 11 to 13, a portion of the holder body 726 near the center of the half-folding door 320 extends and protrudes upward in the width direction of the half-folding door 320 to form a lock holder upper standing wall 727. The upper end of the latch seat upper standing wall 727 extends and protrudes away from the center of the half-folded door 320 in the width direction of the half-folded door 320 to form a latch seat top wall 728. The end of the lock base top wall 728 remote from the lock base upper upstanding wall 727 extends downwardly and projects to define the connector hook 711. Along the height direction of the half-folding door 320, a space is formed between the coupling hook 711 and the seat body 726 to form a coupling notch 712. The coupling notch 712 penetrates the latch holder 710 in the thickness direction of the half-folded door 320.

With the half-folded door 320 in the closed position, as shown in fig. 2, a portion of the lock base top wall 728 is located within the door attachment slot gap 544, the attachment hook head 711 is located within the door attachment slot 540, and the lock case attachment portion 550 is located within the attachment gap 712.

The coupling hook 711 and the door coupling groove 540 cooperate to restrict the relative movement of the half-folding door 320 and the side wall 300 in the width direction of the side wall 300. The coupling strength of the half-folding door 320 and the lock case 500 is enhanced, and thus the coupling strength of the half-folding door 320 and the side pillar 310 is enhanced. Specifically, when the end wall 200 receives an outward expansion force in the first horizontal direction D1 applied by the cargo, the upper end of the side pillar 310 is driven to deform in the width direction of the side wall 300 toward the outside of the side pillar 310 in the first horizontal direction D1. At this time, the coupling hook 711 is hooked to the hooking standing wall 552, and the side post 310 is prevented from being deformed. Thus, the latch rod 720 and the latch hole 551 may not be engaged to prevent the deformation of the side post 310 in the width direction of the side wall 300. The latch hole 551 may be provided as an elongated hole. The long axis direction of the pin hole 551 is parallel to the width direction of the side wall 300. Thus, when the half-folding door 320 is closed with a small amount of deformation of the side pillar 310 in the width direction of the side wall 300, the insertion of the latch lever 720 into the latch hole 551 is facilitated.

The coupling hook 711 has a coupling hook notch 702 and a half-folding door first guide slope 701 on an inner surface of the case in a thickness direction of the half-folding door 320. In the width direction of the half-folding door 320, one end of the half-folding door first guide slope 701, which is close to the center of the half-folding door 320, is closer to the outside of the box of the half-folding door 320 in the thickness direction of the half-folding door 320 than the other end. The hooking standing wall 552 has a half-folding door second guide slope 505 on the outside of the case in the thickness direction of the lock case 500. One end of the half-folding door second guide slope 505 near the first support wall 511 is closer to the case inner face of the lock case 500 in the thickness direction of the lock case 500 than the other end in the length direction of the lock case 500.

If the side pillar 310 is slightly deformed toward the outside of the side pillar 310 in the first horizontal direction D1 in the width direction of the side wall 300, the half-folding door first guide slope 701 contacts the half-folding door second guide slope 505 during the closing of the half-folding door 320. In the process of closing the half-folding door 320, the half-folding door 320 can also be closed to the closing position under the guiding action of the first guiding inclined plane 701 and the second guiding inclined plane 505 of the half-folding door. When the side upright column 310 deforms, the half-folding door 320 is conveniently closed.

In an embodiment not shown, a guide slope may be provided at an outer side edge of the inner face of the box in the thickness direction of the half-folding door, which is far from the lock holder upper standing wall, of the connection hook head and at a groove opening standing edge of the second support wall, which is far from the first support wall, to facilitate the closing of the half-folding door when the side pillar is deformed. The working principle of the guide inclined plane is the same as that of the first guide inclined plane of the half-folding door and the second guide inclined plane of the half-folding door, and the description is omitted here.

When the half-folding door 320 is in the closed position, the door coupling groove bottom wall 541 is located in the coupling hook notch 702 so that the box inner surface of the holder body 726 in the thickness direction of the half-folding door 320 and the box inner surface of the lock box 500 in the thickness direction of the lock box 500 are flush with each other. The box inner face of the seat body 726 in the thickness direction of the half-folded door 320 is flush with the box inner face of the half-folded door 320 in the thickness direction of the half-folded door 320. The box inner face of the lock box 500 in the thickness direction of the lock box 500 and the box inner face of the side wall 300 in the thickness direction of the side wall 300 are flush. Thus, when the half-folding door 320 is in the closed position, the box inner surface of the half-folding door 320 in the thickness direction of the half-folding door 320 and the box inner surface of the side wall 300 in the thickness direction of the side wall 300 are flush with each other. Further, the coupling hook 711 abuts the door coupling groove bottom wall 541 to determine the position of the half-folding door 320 with respect to the side wall 300 in the thickness direction of the side wall 300, thereby aligning the latch lever 720 and the latch hole 551 in the thickness direction of the side wall 300.

As shown in fig. 5, 11-13, a portion of the top surface of the lock case upper wall 515 extends upward to form a stacking column 502. The top surface of the lock box upper wall 515 is a stacking surface 503. The stacking surface 503 is used to support another pallet box stacked above the pallet box. The provision of the coupling groove upper wall 542 can increase the length dimension of the stacking surface 503 in the longitudinal direction of the lock case 500. Thereby facilitating stacking of the pallet boxes with large stacking holes. In addition, the provision of the coupling groove upper wall 542 may increase the strength of the lock case 500.

The lower surface of the coupling groove upper wall 542 is configured as a coupling groove upper wall lower slope 543. Along the length direction of the lock case 500, one end of the connecting groove upper wall lower inclined surface 543 which is far away from the first support wall 511 is farther away from the lower end of the lock case 500 than the other end. The top surface of the portion of the lock block top wall 728 is configured to engage the hook head upper ramp 714. When the half-folding door 320 is in the closed position, the lower inclined surface 543 of the upper wall of the connecting groove and the upper inclined surface 714 of the connecting hook head are correspondingly arranged. At this time, the connecting groove upper wall lower inclined surface 543 is located above the connecting hook head upper inclined surface 714 and is parallel to the connecting hook head upper inclined surface 714. The coupling hook upper inclined surface 714 can support the deformed coupling groove upper wall 542 during stacking. In addition, the connecting groove upper wall lower inclined surface 543 is arranged, so that the strength of the connecting groove upper wall 542 can be increased.

In a not shown embodiment, the connecting groove upper wall can also be eliminated. At this moment, when the half-folding door is positioned at the covering position, the top surface of the top wall of the lock seat is flush with the stacking surface of the lock box.

As shown in fig. 11-13, door handle mounting pin 750 is a rivet. The seat body 726 is provided with rivet mounting grooves 718 on both the box outer face and the box inner face in the thickness direction of the half-folding door 320. Rivet mounting slots 718 are located at door handle mounting holes 716. After the rivet is installed, the two ends of the rivet are located in the rivet installation grooves 718 and do not protrude out of the outer profile of the latch base 710.

With continued reference to fig. 11-13, the lock housing top wall 728 has a latch rod mounting hole 715. The latch lever mounting hole 715 and the latch support hole 713 are concentric. The diameter of the latch rod mounting hole 715 is larger than the diameter of the latch rod 720. The latch lever 720 and the latch spring 730 may be fitted into the latch supporting hole 713 via the latch lever mounting hole 715.

As shown in fig. 2 and 8, a portion of the lock handle 430 near the end surface of the first support wall 511 in the length direction of the lock case 500 protrudes outward to constitute a lock handle boss 435. With the lock handle 430 in the hooked position, the lock handle boss 435 engages the first support wall 511. The lower end of the lock handle boss 435 is located near the catch 610 in the height direction of the lock case 500. Thereby, it is possible to reduce a contact area of the lock handle 430 and the first support wall 511, reduce a frictional force, and increase flexibility in operation of the lock handle 430. In addition, the engagement of the lock handle projection 435 with the first support wall 511 prevents the lock handle 430 from being deflected outward in the length direction of the lock case 500 due to an assembly gap or the like, thereby reducing the overlapping amount of the catch 610 and the lock handle 430.

As shown in fig. 9, the operating portion 432 of the lock handle 430 may be provided with an operating portion slope 437. The operation portion slope 437 is located at one end of the case inner surface of the operation portion 432 in the thickness direction of the lock case 500, which is away from the first support wall 511. One end of the operation portion slope 437 near the first support wall 511 is closer to the handle mounting groove bottom wall 517 than the other end in the length direction of the lock case 500. This can increase the space for operating the operating portion 432 of the finger-operated lock handle 430.

Returning to fig. 1 and 10, the half-folding door 320 is connected to the lockset assembly 400 by a deadbolt assembly 700. The door upper beam 321 constitutes a side upper beam of the tray case in a one-piece beam manner. Compared with the non-full-open half-folding door tray box in the prior art, the side upper beam is high in strength. The sidewall 300 with the half-folded door 320 of the present embodiment has only a door panel 323 of the half-folded door and two cover panels, i.e., a lower side panel, positioned below the door opening 340. The tray box has the advantages of small number of parts, simple structure and low cost.

In the tray box with the non-fully-opened half-folding door in the prior art, a gap exists between the half-folding door and the side upright column along the width direction of the side wall. Thus, the door upper beam of the half-folding door, and the two side wall upper beams located on both sides of the half-folding door in the width direction of the side walls constitute the side upper beams of the tray box. The side wall sheathing panels of the tray box include a door panel of a half-folding door, a lower side sheathing panel of a side wall positioned below a door opening, and two upper sheathing panels connected to two side wall upper beams.

Referring back to fig. 1 and 3, the chassis 100 has chassis uprights 110 at four corners. The elevation of the chassis pillar 110 towards the end wall 200 and the elevation towards the side wall 300 each have an elongated slot (not shown) extending in the height direction D3 of the chassis 100. Both ends of the end wall underbeam of the end wall 200 have end wall hinge axes extending outwardly in a length direction of the end wall underbeam. Both ends of the side wall lower beam of the side wall 300 have side wall hinge shafts (not shown) extending outward in the length direction of the side wall lower beam. The end wall hinge axis and the elongated slot cooperate to allow the end wall 200 to hinge with the chassis upright 110. The hinge axis of the side wall is engaged with the elongated slot to hinge the side wall 300 to the chassis upright 110. The end wall 200 is pivotally foldable about an end wall hinge axis to an end wall folded position of the chassis 100 and the side wall 300 is pivotally foldable about a side wall hinge axis to a side wall folded position of the chassis 100. The end wall 200 may be folded first and then the side wall 300 may be folded.

The application also provides a pallet box. The pallet box may be the pallet box described previously.

In this embodiment, the tray box includes the aforementioned lock assembly, the maximum dimension H1 between the lock handle 430 and the outer side surface 506 is smaller than the dimension H2 of the side pillar 310 in the width direction of the side wall 300, when the lock assembly 400 is disposed on the side wall 300 of the tray box, the half-folding door 320 can be as close to the side pillar 310 as possible in the width direction of the side wall 300, and the dimension of the half-folding door 320 of the tray box in the width direction of the side wall 300 can be as large as possible, so that the cargo can be loaded and unloaded through the door opening 340 of the side wall 300.

The present application has been described in terms of the above-described embodiments, but it should be understood that the above-described embodiments are for purposes of illustration and description only and are not intended to limit the application to the scope of the described embodiments. Furthermore, it will be understood by those skilled in the art that the present application is not limited to the embodiments described above, and that many variations and modifications may be made in accordance with the teachings of the present application, all falling within the scope of the present application as claimed. The scope of protection of this application is defined by the appended claims and their equivalents.

Unless defined otherwise, 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 herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Terms such as "component" and the like, when used herein, can refer to either a single part or a combination of parts. Terms such as "mounted," "disposed," and the like, as used herein, may refer to one component being directly attached to another component or one component being attached to another component through intervening components. Features described herein in one embodiment may be applied to another embodiment, either alone or in combination with other features, unless the feature is otherwise inapplicable or otherwise stated in the other embodiment.

Claims (22)

1. A lock assembly for connection to the top end of a side post of a side wall of a pallet box for hooking an end wall of the pallet box, the lock assembly comprising:

a lock case having a first support wall and a second support wall spaced apart from each other along a length direction of the lock case to form a handle installation groove, the lock case being provided with a shaft portion support hole having an axial direction parallel to the length direction of the lock case, the shaft portion support hole being located at the first support wall and the second support wall;

the locking rotating shaft is rotatably arranged in the shaft part supporting hole in a penetrating mode, and a locking hook is arranged at one end, extending out of the outer side face of the first supporting wall, far away from the second supporting wall;

a lock handle, an upper end of the lock handle being located in the handle mounting groove, the upper end of the lock handle being connected to the lock rotation shaft so that the lock handle can swing between a hooking position where the lock hook is hooked to the end wall and an unlocking position where the lock hook is separated from the end wall, a maximum dimension between the lock handle and the outer side surface in a length direction of the lock case being smaller than a dimension of the side post in a width direction of the side wall.

2. The lock assembly of claim 1, wherein with the lock handle in the hooked position, the lock handle does not protrude beyond an outer profile of the lock box.

3. The lock assembly of claim 1, wherein the lock case further includes a handle mounting groove bottom wall located at a bottom of the handle mounting groove, the handle mounting groove bottom wall being spaced apart from an exterior of the lock case, the handle mounting groove bottom wall being provided with a handle mounting hole, and with the lock handle in the hooked position, a portion of the lock handle is located in the handle mounting hole, and an interior of the lock handle is flush with an interior of the lock case.

4. The lock assembly as claimed in claim 3, wherein the lock handle is provided at a lower end thereof with an operating portion, and the operating portion is spaced from the handle mounting groove bottom wall in the condition that the lock handle is located at the hooking position.

5. The lock assembly as claimed in claim 4, wherein a lower end of the handle mounting groove extends to a side of the operating portion away from the outer side surface in a length direction of the lock case to constitute a handle operating portion.

6. The lock assembly according to claim 1, wherein the lock case further has a third support wall and a fourth support wall spaced apart along a length direction of the lock case to constitute a bar installation groove, the lock case further being provided with a bar support hole having an axial direction parallel to an axial direction of the shaft portion support hole, the bar support hole being located at the third support wall and the fourth support wall and communicating with the handle installation groove,

the tool to lock subassembly still includes the pin, the pin is followed the axial direction in pin supported hole is movably worn to locate between the limiting position and the position of leaving the pin supported hole, the lock handle is provided with the spacing portion of pin, is located limiting position being close to of pin the spacing end of lateral surface sets up in being located the hookup position the lock handle the 5 outsides of the case of the part of the spacing portion of pin, in order to stop the lock handle orientation the unblock position swing.

7. The lock assembly as claimed in claim 6,

the stopper support hole is located between the shaft support hole and the lower end of the lock handle in the height direction of the lock case, and/or

The third supporting wall and the fourth supporting wall are located on one side, close to the second supporting wall, of the first supporting wall, and the stop lever limiting portion is located at one end, far away from the outer side face, of the lock handle.

8. The lock assembly according to claim 6, further comprising a stop lever operation member and a stop lever spring, wherein the stop lever operation member is connected to the stop lever, the stop lever operation member is located at the stop lever installation groove, the stop lever is located at the limit position, the 5 stop lever operation member abuts against the third support wall, the stop lever spring is sleeved on the stop lever, one end of the stop lever spring abuts against the stop lever operation member, and the other end of the stop lever spring abuts against the fourth support wall, so as to apply an acting force capable of moving the stop lever toward the limit position to the stop lever operation member.

9. The lock assembly of claim 8, wherein at least one of the limit stop and the box inner face of the 0-lock handle is provided with a slope of a guide bar, and one end of the slope of the guide bar, which is close to the outer side face, is closer to the box inner face of the lock box than the other end, which is far from the outer side face, along the length direction of the lock box.

10. The lock assembly as claimed in claim 9, wherein the slope of the guide bar comprises a bar guide slope provided at the stopper end,

5 the lock box still has and is located the spacing portion of operation of pin mounting groove department, the spacing portion of operation is including being located the first spacing portion of operation of the upside of pin, and be located the spacing portion of second operation of the downside of pin, the pin operating parts runs through the pin, the upper end of pin operating parts is located the case outside of the spacing portion of first operation, the lower extreme of pin operating parts is located the case outside of the spacing portion of second operation, so that first operation spacing portion with the spacing portion 0 of second operation can block the pin operating parts rotates.

11. The lock assembly of claim 10, wherein a portion of the lock handle is recessed toward an inner surface of the lock handle case to form the bar retaining portion, and the retaining end of the bar in the retaining position is disposed outside of the case at a bottom wall of the bar retaining portion of the lock handle in the hooking position to block the lock handle from swinging toward the unlocking position.

12. The lock assembly as claimed in claim 11, wherein the operation restricting portion is configured to protrude toward a case outside of the lock case.

13. The lock assembly as claimed in claim 12, wherein the second operation restricting portion has a case outer surface located outside the case of the bottom wall of the pin restricting portion in a thickness direction of the lock case with the lock handle located at the hooking position,

follow the direction of height of lock box, the lower extreme of the spacing portion of pin is located the lower extreme department of the spacing portion of second operation, being close to of the spacing portion of second operation the tip of lock handle has finger guide inclined plane, follows the thickness direction of lock box, finger guide inclined plane be close to the one end of lateral surface is for keeping away from the other end of lateral surface is closer to more the case inner face of lock box.

14. A pallet box, characterized in that it comprises:

a chassis;

an end wall;

a side wall provided with a lock assembly according to any one of claims 1 to 13.

15. The tray box of claim 14, further comprising a half-flap door comprising a latch assembly located at an upper corner of the half-flap door,

at least one the lateral wall includes lateral wall centre sill and side stand, follows the direction of height of lateral wall, the lateral wall centre sill is located between the both ends of lateral wall, the both ends of lateral wall centre sill are connected to two respectively the side stand to constitute the door opening, the lower extreme of the lock box of tool to lock subassembly is connected to the top of side stand, the one end of half-folding door is closing the position of closing of door opening with open but pivot ground is connected to the lateral wall centre sill between the open position of door opening, half-folding door is located under the condition of the position of closing, the tool to lock subassembly is connected to the bolt lock subassembly, in order will half-folding door is fixed in the position of closing, follows the width direction of lateral wall, half-folding door by one the side stand extends to another the side stand.

16. The tray case according to claim 15, wherein, in a width direction of the side walls, portions of inner sides of the lock cases near centers of the side walls are extended and projected toward centers of the side walls to constitute lock case attaching portions having latch holes whose axial directions are parallel to a height direction of the side walls,

the bolt lock assembly comprises a bolt lock seat and a bolt rod, the bolt lock seat is provided with a bolt supporting hole, the axial direction of the bolt supporting hole is parallel to the height direction of the half-folding door, the bolt rod is movably arranged in the bolt supporting hole in a penetrating mode along the axial direction of the bolt hole, the half-folding door is located under the covering position, the part of the bolt lock seat is located below the lock box connecting portion, and the bolt rod extends into the bolt hole.

17. The tray bin of claim 16, wherein the latch rod includes a first rod segment and a second rod segment, the first rod segment having a diameter greater than a diameter of the second rod segment, the latch support hole including a first hole segment and a second hole segment, the first hole segment having an inner diameter greater than an inner diameter of the second hole segment, the latch lock assembly further including a latch spring, the latch spring being received in the second rod segment and positioned within the first hole segment, the first rod segment being received in the first hole segment, the second rod segment being received in the second hole segment, one end of the latch spring abutting a connection surface of the first rod segment and the second rod segment, the other end of the latch spring abutting a connection surface of the first hole segment and the second hole segment to apply a force to the latch rod that extends the first rod segment out of the first hole segment.

18. The tray box of claim 16, wherein an end vertical surface of the latch lock base near the center of the half-folding door is provided with a door handle mounting hole which is communicated with the latch support hole, an outer circumferential surface of the latch rod is provided with a latch rod rack portion, the latch lock assembly further comprises a door handle and a door handle mounting pin, the door handle is provided with a door handle gear portion, the door handle is arranged in the door handle mounting hole in a penetrating manner, the door handle is rotatably connected to the latch lock base through the door handle mounting pin, an axial direction of the door handle mounting pin is parallel to a thickness direction of the half-folding door, and the door handle gear portion is meshed with the latch rod rack portion to drive the latch rod to move along the axial direction of the latch hole.

19. The tray case according to claim 16, wherein a portion of the lock case coupling part near a center of the side wall in a width direction of the side wall extends upward to constitute a hooking standing wall, a space is provided between the hooking standing wall and the second supporting wall in the width direction of the side wall to constitute a door coupling groove, the lock case is provided with a door coupling groove notch communicated to an upper end of the door coupling groove,

the part of the seat body of the bolt lock seat extends upwards to form a lock seat upper standing wall, the upper end of the lock seat upper standing wall extends and protrudes along the width direction of the half-folding door away from the center of the half-folding door to form a lock seat top wall, the end part of the lock seat top wall, which is away from the lock seat upper standing wall, extends and protrudes downwards to form a connecting hook head, and a gap is formed between the free end of the connecting hook head and the seat body along the height direction of the half-folding door to form a connecting gap,

the half-folding door is positioned at the covering position, the part of the top wall of the lock base is positioned in the gap of the door connecting groove, and the connecting hook head is positioned in the door connecting groove.

20. The tray case of claim 19, wherein the lock case further includes a lock case upper wall connected to an upper end of the second support wall, the lock case upper wall including a coupling groove upper wall at the door coupling groove, the coupling groove upper wall being located above the hooking standing wall, a space being present between the coupling groove upper wall and the hooking standing wall in a height direction of the side wall to constitute the door coupling groove notch communicating with the door coupling groove.

21. The tray case of claim 20, wherein a portion of the top surface of the upper wall of the lock case extends upward to form a stacking column, the lower surface of the upper wall of the coupling groove is configured as a lower inclined surface of the upper wall of the coupling groove, the top surface of the top wall of the lock housing is provided with an upper inclined surface of the coupling hook head, and the half-folding door is positioned at the covering position, the lower inclined surface of the upper wall of the coupling groove is positioned above the upper inclined surface of the coupling hook head and is parallel to the upper inclined surface of the coupling hook head.

22. The tray case of claim 19, wherein the lock box further includes a door attachment slot bottom wall at the door attachment slot, the door attachment slot bottom wall being located at an inner case end of the lock box.

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