Carriage convenient to unfold

Abstract

The utility model discloses a carriage convenient to unfold, which belongs to the field of carriages, and is characterized in that a rotating part of an unfolding plate is sleeved on a screw rod by adopting a connecting plate, and two ends of the screw rod are connected with a non-rotating piston, so that when the unfolding plate is unfolded, the piston is driven to move through the screw rod along with rotation; pistons at the two ends of the lead screw are connected with two different piston grooves respectively, one piston groove is communicated with the outside to limit the speed according to the size of a through hole, and the other piston groove is connected with hydraulic equipment to limit the speed of an unfolded driving box. Therefore, when the unfolding plate is unfolded, the dangerous situation that a motor or a circuit breaks down and rapidly descends can be better avoided, meanwhile, the unfolding plate is unfolded downwards, the bottom of the unfolded unfolding plate is provided with a screw and sleeve combination capable of being unfolded and supported, the unfolding plate can be used as a platform after being unfolded, and use is convenient. Power generation equipment and the like can be placed on the platform and pushed into the carriage, and loading of the power generation equipment and the like is facilitated.

Description

Technical Field

[0001] The utility model belongs to the field of carriages, and particularly relates to a carriage which is easy to unfold. Background Art

[0002] The carriage, as a protective shell for loading items during automobile transportation, is divided into a closed structure and a roofless open structure. During the use of special vehicles such as emergency power supply, since the carriage needs to be loaded with equipment such as wires, generators, batteries, etc., in order to avoid risks such as water ingress into the equipment, the equipment mostly adopts an openable closed carriage. However, when the prior art is used, ordinary carriages mostly use the rear door to open for equipment loading and unloading, and some carriages that can be opened on the side also mostly use a motor-driven lifting or upward opening method. The unfolded side panels are simply fixed by motors. If there is a motor or circuit failure, there is a risk of rapid descent, which can easily cause risks in use and low safety. At the same time, after the carriage is unfolded, equipment loading and unloading can only be carried out in a narrow carriage, which is inconvenient when lifting heavy items such as generators. Utility Model Content

[0003] 1. Technical issues to be resolved

[0004] In order to overcome the problems of the prior art, ordinary carriages mostly use the rear door to open for equipment loading and unloading, and some carriages that can be opened on the side also use motor-driven lifting or upward opening. The unfolded side panels are simply fixed by motors. If a motor or circuit failure occurs, there is a risk of rapid falling, which can easily cause risks in use and has low safety. At the same time, after the carriage is unfolded, equipment loading and unloading can only be carried out in a narrow carriage, which is inconvenient when lifting heavy items such as generators.

[0005] (II) Technical solution

[0006] The utility model is realized by the following technical scheme: the utility model proposes a compartment that is easy to unfold, and the structure of the compartment includes a bottom plate, side pillars, a rear door plate, a top plate, side plates and a front plate, the four sides of the top of the bottom plate are fixedly connected to the four sides of the bottom of the top plate through the side pillars, a front plate is fixed on one side between the bottom plate and the top plate, a rear door plate is hinged between the bottom plate and the top plate away from the front plate, and side plates are also fixed on both sides of the bottom plate and the top plate perpendicular to the front plate;

[0007] The side panel comprises an expansion panel, an adsorption panel, an electromagnet, a first latch, a connecting pipe, a hydraulic pump, an electromagnetic valve, a partition panel, a side door panel, a second latch, a main panel body, a connecting panel, a through hole, a first piston groove, a first piston, a screw rod, a second piston groove, a first through hole, a second through hole and a second piston. The main panel body is fixed between the bottom panel and the top panel. The side door panel is hingedly connected through the main panel body adjacent to the front panel. The partition panel is fixed between the side panels and the bottom panel and the top panel on both sides. The expansion panel is located through the main panel body. One side of the expansion panel is connected to the partition panel. The other side of the expansion panel is located on the side of the side door panel away from the front panel. An adsorption panel is embedded and fixed on the top of the expansion panel adjacent to the top panel. An electromagnet is embedded and fixed on the top panel adjacent to the expansion panel. The electromagnet is used to attract the adsorption panel. A connecting plate is fixed at the bottom of the expansion panel. The connecting plate is embedded on the side end surface of the bottom panel. The bottom panel A screw rod is assembled inside the side adjacent to the connecting plate, and the screw rod is clearance-matched with the bottom plate. The screw rod passes through the connecting plate and is threadedly connected to the connecting plate. The two ends of the screw rod are respectively fixedly connected with a first piston and a second piston. The first piston and the second piston are both arranged in the bottom plate. The first piston and the second piston are provided in the bottom plate. A first piston groove and a second piston groove are provided at the place where the first piston and the second piston are provided. The first piston and the second piston are respectively interference-fitted with the first piston groove and the second piston groove. The first piston groove passes through the bottom plate through a through hole away from the screw rod end, and the two ends of the second piston groove are respectively connected with the first through hole and the second through hole. The hydraulic pump is fixed on the bottom plate, and the hydraulic pump is connected to one end of the connecting pipe through an electromagnetic valve, and the other end of the connecting pipe is connected to the first through hole and the second through hole. A first latch is fixed to the bottom of the side of the expansion plate adjacent to the bottom plate, and the first latch is used to lock the expansion plate and the bottom plate.

[0008] Furthermore, an adjustable cover may be locked to a portion of the through hole that passes through the bottom plate away from the first piston side, and a filter screen having a diameter smaller than that of the through hole may be fixedly passed through the adjustable cover.

[0009] Furthermore, a positioning cover, a support screw, a support sleeve and a support pad are provided on the unfolding plate. The unfolding plate is embedded with a support sleeve hinged on the side away from the bottom plate. The support sleeve is sleeved on the support screw away from the hinged side of the unfolding plate. The support screw is threadedly connected to the support sleeve. A support pad is fixed on the side of the support screw away from the support sleeve. The positioning cover is used for limiting and fixing the support screw and the support pad when they are embedded and stored on the unfolding plate.

[0010] Furthermore, there are more than two positioning covers, support screws, support sleeves and support pads, and the more than two positioning covers, support screws, support sleeves and support pads are symmetrically arranged on the unfolding plate about the upper and lower center lines.

[0011] Furthermore, the second latch is composed of a handle bar, a limit plate, an assembly plate, a latch rod, a balance bar, a compression spring, a top pressure plate, a latch slot and a baffle bar. The assembly plate is fixed to the unfolding plate, and the assembly plate is fixed with more than two limit plates on the side away from the unfolding plate. The latch rod is penetrated and assembled on more than two limit plates. A top pressure plate is fixed on the side end face of the latch rod, and the top pressure plate is located between the two limit plates. A compression spring is provided between the top of the top pressure plate and the limit plate. A balance bar is fixed on the top of the top pressure plate. The top of the balance bar penetrates the limit plate, and the compression spring is sleeved on the balance bar. The top of the latch rod penetrates the limit plate and is fixed to the handle bar on the rear end face. The top of the bottom plate is provided with a latch slot. The bottom of the latch rod penetrates the limit plate and is latched in the latch slot. The baffle bar is fixed to the unfolding plate, and the baffle bar is located above the handle bar.

[0012] Furthermore, the first piston and the second piston are not rotatable in the first piston groove and the second piston groove.

[0013] (III) Beneficial effects

[0014] One of the above technical solutions has the following advantages or beneficial effects:

[0015] In order to solve the problem that in the prior art, ordinary carriages mostly adopt the method of opening the rear door to load and unload equipment when in use, and some carriages that can be opened on the side also adopt the method of motor-driven lifting or upward opening. The unfolded side panels are simply fixed by motors. If there is a motor or circuit failure, there is a risk of rapid descent, which is easy to cause the risk of use and low safety. At the same time, after the carriage is unfolded, equipment can only be loaded and unloaded in a narrow carriage, which is inconvenient when lifting heavy objects such as generators. By providing side panel unfolding panels that can be locked by electromagnets, latches, piston grooves, etc., the unfolded panels of the side panels can be fully fixed when not unfolded, and the rotation part of the unfolding panels adopts connecting plates to be sleeved on The method is on the screw rod, and both ends of the screw rod are connected to non-rotatable pistons, so that when the expansion plate is expanded, the piston will be driven to move through the screw rod as it rotates, and the pistons at both ends of the screw rod are respectively connected to two different piston grooves. One piston groove is connected to the outside and the speed is limited by the size of the through hole, while the other piston groove is connected to the hydraulic equipment to expand the drive box to limit the speed, so that when the expansion plate is expanded, it can better avoid the dangerous situation of rapid descent due to motor or circuit failure. At the same time, the expansion plate is expanded downward, and the bottom after expansion is provided with an expandable support screw and sleeve combination, so that the expansion plate can be used as a platform after expansion, and the power generation equipment can be placed on the platform and then pushed into the carriage, so as to facilitate the loading of the power generation equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0017] Figure 1 This is a schematic diagram of the structure of a carriage that is easy to unfold according to the utility model;

[0018] Figure 2 It is a cross-sectional structural schematic diagram of the left view of the utility model;

[0019] Figure 3 It is a cross-sectional structural schematic diagram of the front view of the utility model;

[0020] Figure 4 For this utility model Figure 3 A is a schematic diagram of the enlarged structure of the middle part;

[0021] Figure 5 It is a schematic diagram of the cross-sectional structure of the side panel assembly portion of the front view of the utility model;

[0022] Figure 6 For this utility model Figure 5 Schematic diagram of the enlarged structure of B;

[0023] Figure 7 For this utility model Figure 5 Schematic diagram of the enlarged structure of C in the middle;

[0024] In the figure: bottom plate-1, side column-2, rear door plate-3, top plate-4, side plate-5, front plate-6, unfolding plate-a, adsorption plate-b, electromagnet-c, first latch-d, connecting pipe-e, hydraulic pump-f, solenoid valve-g, partition plate-h, side door plate-i, second latch-j, main plate body-k, connecting plate-l, through hole-m, first piston groove-n, first piston-o, screw rod-p, second piston groove-q, first through hole-r, second through hole-s, second piston-t, adjusting cover-u, filter screen-v, positioning cover-a1, supporting screw rod-a2, supporting sleeve-a3, supporting pad-a4, handle-j1, limit plate-j2, assembly plate-j3, latch rod-j4, balance rod-j5, compression spring-j6, top pressure plate-j7, latch groove-j8, and stop rod-j9. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below in conjunction with the embodiments, but the implementation manner of the present invention is not limited thereto.

[0026] The utility model provides a compartment that is easy to unfold: its structure includes a bottom plate 1, side pillars 2, a rear door plate 3, a top plate 4, side plates 5 and a front plate 6, the top four sides of the bottom plate 1 are fixedly connected to the bottom four sides of the top plate 4 through the side pillars 2, the front plate 6 is fixed on one side between the bottom plate 1 and the top plate 4, the rear door plate 3 is hinged between the bottom plate 1 and the top plate 4 away from the front plate 6, and the side plates 5 are also fixed on both sides of the bottom plate 1 and the top plate 4 perpendicular to the front plate 6;

[0027] The side plate 5 includes an expansion plate a, an adsorption plate b, an electromagnet c, a first latch d, a connecting pipe e, a hydraulic pump f, a solenoid valve g, a partition plate h, a side door plate i, a second latch j, a main plate body k, a connecting plate l, a through hole m, a first piston groove n, a first piston o, a screw rod p, a second piston groove q, a first through hole r, a second through hole s and a second piston t. The main plate body k is fixed between the bottom plate 1 and the top plate 4. The main plate body k is adjacent to the front plate 6 and is hinged with a side door plate i. The partition plate h is fixed to The expansion plate a penetrates the main body k and is located between the side plates 5 on both sides and the bottom plate 1 and the top plate 4. One side of the expansion plate a is connected to the partition plate h. The other side of the expansion plate a is located on the side of the side door plate i away from the front plate 6. The top of the expansion plate a is adjacent to the top plate 4 and is inlaid with an adsorption plate b. The top plate 4 is adjacent to the expansion plate a and is inlaid with an electromagnet c. The electromagnet c is used to attract the adsorption plate b. The bottom of the expansion plate a is fixed with a connecting plate l. The connecting plate l is inlaid on the side end surface of the bottom plate 1. A screw rod p is assembled inside the side of the bottom plate 1 adjacent to the connecting plate l, and the screw rod p is clearance-matched with the bottom plate 1. The screw rod p penetrates the connecting plate 1 and is threadedly connected to the connecting plate 1. The two ends of the screw rod p are respectively fixedly connected with a first piston o and a second piston t. The first piston o and the second piston t are both arranged in the bottom plate 1. The first piston o and the second piston t are provided in the bottom plate 1. A first piston groove n and a second piston groove q are provided at the place where the first piston o and the second piston t are provided. The first piston o and the second piston t are respectively interference-fitted with the first piston groove n and the second piston groove q. The first piston groove n penetrates the bottom plate 1 through a through hole m away from the end of the screw rod p. The two ends of the second piston groove q are respectively connected with the first through hole r and the second through hole s. The hydraulic pump f is fixed on the bottom plate 1. The hydraulic pump f is connected to one end of the connecting pipe e through an electromagnetic valve g. The other end of the connecting pipe e is connected to the first through hole r and the second through hole s. A first latch d is fixed to the bottom of the side of the expansion plate a adjacent to the bottom plate 1. The first latch d is used to lock the expansion plate a and the bottom plate 1.

[0028] The through hole m that penetrates the bottom plate 1 away from the first piston o can also be locked with an adjustable cover u, and a filter screen v with a diameter smaller than that of the through hole m is fixedly penetrated on the adjustable cover.

[0029] Among them, the unfolding plate a is provided with a positioning cover a1, a support screw a2, a support sleeve a3 and a support pad a4. The unfolding plate a is embedded with a support sleeve a3 on the side away from the bottom plate 1, and the support sleeve a3 is sleeved on the support screw a2 away from the hinged side of the unfolding plate a. The support screw a2 is threadedly connected with the support sleeve a3, and a support pad a4 is fixed on the side of the support screw a2 away from the support sleeve a3. The positioning cover a1 is used for limiting and fixing the support screw a2 and the support pad a4 when they are embedded and stored on the unfolding plate a.

[0030] Among them, there are more than two positioning covers a1, support screws a2, support sleeves a3 and support pads a4, and the more than two positioning covers a1, support screws a2, support sleeves a3 and support pads a4 are symmetrically arranged on the unfolding plate a along the upper and lower center lines.

[0031] The second latch j is composed of a handle j1, a limit plate j2, an assembly plate j3, a latch rod j4, a balance rod j5, a compression spring j6, a top pressure plate j7, a latch slot j8 and a stop rod j9. The assembly plate j3 is fixed on the unfolding plate a. More than two limit plates j2 are fixed on the side of the assembly plate j3 away from the unfolding plate a. The latch rod j4 is assembled through more than two limit plates j2. A top pressure plate j7 is fixed on the side end face of the latch rod j4. The top pressure plate j7 is located between the two limit plates j2. A compression spring j6 is provided between the top of the pressure plate j7 and the limit plate j2, a balance rod j5 is fixed on the top of the top pressure plate j7, the top of the balance rod j5 passes through the limit plate j2, the compression spring j6 is sleeved on the balance rod j5, the top of the latch rod j4 passes through the limit plate j2 and a handle bar j1 is fixed to the rear end face, a latch groove j8 is provided on the top of the bottom plate 1, the bottom of the latch rod j4 passes through the limit plate j2 and is latched in the latch groove j8, the blocking rod j9 is fixed on the unfolding plate a, and the blocking rod j9 is located above the handle bar j1.

[0032] The first piston o and the second piston t are not rotatable in the first piston groove n and the second piston groove q.

[0033] Implementation scheme: During use, the partition plate h of the carriage divides the interior of the carriage into two compartments, which is convenient for loading different equipment in the carriage. The compartment located at the rear door panel 3 is directly loaded by opening the rear door panel 3, while the compartment located at the front panel 6 can be loaded by opening the side door panel i when taking small tools. When the compartment located at the front panel 6 is loaded with large equipment, the equipment can be loaded by opening the expansion plate a. When the expansion plate a is opened, it is necessary to pull up the second latch j to unlock the latch. When the second latch j is pulled up, the latch rod j4 can be pulled up by the handle j1 to disengage from the latch slot j8, and the handle j1 can be rotated to cross the stop rod j9 and then hung on the stop rod j9. After unlocking the second latch j, the adsorption lock of the electromagnet c is released and the hydraulic pump f is driven to work. To open the expansion plate a. When the expansion plate a is opened, the second piston groove q is controlled to move in the second piston groove q by the hydraulic pump f, so that the second piston groove q drives the screw rod p to move. During the movement of the screw rod p, since the screw rod p cannot rotate, the connecting plate l threadedly connected to the screw rod p drives the expansion plate a to expand. After the expansion plate a is fully expanded, the positioning cover a1 can be released to restrain the support screw a2 and the support pad a4, and then the support screw a2, the support sleeve a3 and the support pad a4 are expanded through the hinge of the support sleeve a3, and the support screw a2 is selected for height adjustment to achieve support for the expansion plate a after expansion, forming a platform, which is convenient for placing the power generation equipment on the platform and pushing it into the carriage or unloading it after pushing the equipment in the carriage, so as to facilitate the loading and unloading of the power generation equipment.

[0034] During the unfolding process of the unfolding plate a, if the electromagnet c fails, the unfolding plate a will slightly separate from the assembly position of the electromagnet c due to gravity. At this time, since the hydraulic pump f has not been turned on, the second piston t cannot move in the second piston groove q, so that the unfolding plate a is in a restricted state of the second piston t, thereby preventing the unfolding plate a from being instantly lowered and opened. If the hydraulic pump f is damaged, the unfolding plate a will also be affected by the movement rate of the first piston o in the first piston groove n when it is lowered and opened. The through hole m connected to the outside can fix and limit the movement rate of the first piston o in the first piston groove n, further avoiding the danger of the unfolding plate a being quickly lowered due to damage to the opening device, and the through hole m connected to the outside can also be locked with an adjustment cover u, which is convenient for adjusting the fixed limit speed, so as to facilitate the opening and use of the carriage;

[0035] After the unfolding panel a of the carriage is unfolded, the handle j1 can be moved to disengage the stop rod j9, so that the latch rod j4 is pressed by the compression spring j6 and is in a latch state. When the unfolding panel a is closed, the latch rod j4 can automatically enter the latch groove j8 for locking due to the compression spring j6, so that the unfolding panel a can be in a stable state when closed, with the electromagnet c adsorbing, the first latch d locking, and the hydraulic pump f limiting, to avoid opening due to shaking when closed.

[0036] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "up", "down", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0037] The control method of the present invention is to control by manually starting and closing the switch. The wiring diagram of the power element and the provision of power supply are common knowledge in the field, and the present invention is mainly used to protect mechanical devices, so the present invention will not explain the control method and wiring arrangement in detail.

[0038] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0039] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A compartment that is easy to unfold, the structure of which comprises a bottom plate (1), side pillars (2), a rear door plate (3), a top plate (4), side plates (5) and a front plate (6), wherein the top four sides of the bottom plate (1) are fixedly connected to the bottom four sides of the top plate (4) through the side pillars (2), the front plate (6) is fixed to one side between the bottom plate (1) and the top plate (4), the rear door plate (3) is hingedly connected to the bottom plate (1) and the top plate (4) on the side away from the front plate (6), and the side plates (5) are also fixed to both sides of the bottom plate (1) and the top plate (4) perpendicular to the front plate (6); Features: The side plate (5) comprises an unfolding plate (a), an adsorption plate (b), an electromagnet (c), a first latch (d), a connecting pipe (e), a hydraulic pump (f), an electromagnetic valve (g), a partition plate (h), a side door plate (i), a second latch (j), a main plate body (k), a connecting plate (l), a through hole (m), a first piston groove (n), a first piston (o), a screw rod (p), a second piston groove (q), a first through hole (r), a second through hole (s) and a second piston (t); the main plate body (k) is fixed between the bottom plate (1) and the top plate (4); the main plate body (k) is hingedly connected with the side door plate (i) on the side adjacent to the front plate (6); the partition plate (h) is fixed to The unfolding plate (a) passes through the main body (k) between the side plates (5) and the bottom plate (1) and the top plate (4) on both sides; one side of the unfolding plate (a) is connected to the partition plate (h); the other side of the unfolding plate (a) is located on the side of the side door plate (i) away from the front plate (6); an adsorption plate (b) is inlaid and fixed on the top of the unfolding plate (a) adjacent to the top plate (4); an electromagnet (c) is inlaid and fixed on the top plate (4) adjacent to the unfolding plate (a); the electromagnet (c) is used to attract the adsorption plate (b); a connecting plate (l) is fixed on the bottom of the unfolding plate (a); the connecting plate (l) is inlaid on the side end surface of the bottom plate (1); the bottom plate (1) adjacent to the connecting plate (l) side A screw rod (p) is assembled inside, the screw rod (p) is clearance-matched with the bottom plate (1), the screw rod (p) passes through the connecting plate (l) and is threadedly connected to the connecting plate (l), the two ends of the screw rod (p) are respectively fixedly connected with a first piston (o) and a second piston (t), the first piston (o) and the second piston (t) are both arranged in the bottom plate (1), the first piston (o) and the second piston (t) are provided in the bottom plate (1), and a first piston groove (n) and a second piston groove (q) are provided at the first piston (o) and the second piston (t), the first piston (o) and the second piston (t) are respectively interference-matched with the first piston groove (n) and the second piston groove (q), and the first piston groove (n) is far away from the screw rod (p). The end of the second piston groove (q) passes through the bottom plate (1) through the through hole (m), the two ends of the second piston groove (q) are respectively connected to the first through hole (r) and the second through hole (s), the hydraulic pump (f) is fixed on the bottom plate (1), the hydraulic pump (f) is connected to one end of the connecting pipe (e) through the solenoid valve (g), and the other end of the connecting pipe (e) is connected to the first through hole (r) and the second through hole (s), the first latch (d) is fixed to the bottom of the expansion plate (a) adjacent to the bottom plate (1), the first latch (d) is used to lock the expansion plate (a) and the bottom plate (1), and the first piston (o) and the second piston (t) cannot rotate in the first piston groove (n) and the second piston groove (q).

2. The easily deployable carriage according to claim 1, characterized in that: The through hole (m) can be locked with an adjustable cover (u) at the bottom plate (1) on the side away from the first piston (o), and a filter screen (v) with a diameter smaller than that of the through hole (m) is fixedly penetrated on the adjustable cover.

3. The easily deployable carriage according to claim 1, characterized in that: The unfolding plate (a) is provided with a positioning cover (a1), a support screw (a2), a support sleeve (a3) ​​and a support cushion block (a4); the side of the unfolding plate (a) away from the bottom plate (1) is inlaid with a support sleeve (a3) ​​hingedly connected; the side of the support sleeve (a3) ​​away from the hinged side of the unfolding plate (a) is sleeved on the support screw (a2); the support screw (a2) is threadedly connected to the support sleeve (a3); the side of the support screw (a2) away from the support sleeve (a3) ​​is fixed with a support cushion block (a4); the positioning cover (a1) is used for limiting and fixing the support screw (a2) and the support cushion block (a4) when they are inlaid and stored on the unfolding plate (a).

4. The easily deployable carriage according to claim 3, characterized in that: There are more than two positioning covers (a1), support screws (a2), support sleeves (a3) ​​and support pads (a4), and the more than two positioning covers (a1), support screws (a2), support sleeves (a3) ​​and support pads (a4) are symmetrically arranged on the unfolding plate (a) along the upper and lower center lines.

5. The easily deployable carriage according to claim 1, characterized in that: The second latch (j) is composed of a handle bar (j1), a limit plate (j2), an assembly plate (j3), a latch rod (j4), a balance rod (j5), a compression spring (j6), a pressure plate (j7), a latch groove (j8) and a stop rod (j9); the assembly plate (j3) is fixed on the unfolding plate (a); at least two limit plates (j2) are fixed on the side of the assembly plate (j3) away from the unfolding plate (a); the latch rod (j4) is assembled through the at least two limit plates (j2); a pressure plate (j7) is fixed on the side end face of the latch rod (j4); the pressure plate (j7) is located between the two limit plates (j2); the pressure plate A compression spring (j6) is provided between the top of the top pressure plate (j7) and the limit plate (j2); a balance rod (j5) is fixed on the top of the top pressure plate (j7); the top of the balance rod (j5) passes through the limit plate (j2); the compression spring (j6) is sleeved on the balance rod (j5); the top of the latch rod (j4) passes through the limit plate (j2); a handle bar (j1) is fixed on the rear end face; a latch groove (j8) is provided on the top of the bottom plate (1); the bottom of the latch rod (j4) passes through the limit plate (j2) and is latched in the latch groove (j8); the blocking rod (j9) is fixed on the unfolding plate (a); and the blocking rod (j9) is located above the handle bar (j1).

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