Guardrail structure of luggage barrow

Abstract

The utility model belongs to the technical field of guardrail structures of luggage barrows, in particular to a guardrail structure of a luggage barrow, which is characterized in that a frame comprises a main support and an auxiliary support which are hinged with each other, and the frame can be kept in an unfolded or folded state by adjusting the positions of the auxiliary support and the main support; wheels are arranged below the main support and the auxiliary support. A handle is arranged on the main bracket; a cushion is fixedly arranged on the main bracket; comprising a guardrail, a mounting base is detachably arranged on a main support, and the guardrail is connected to the mounting base; a back plate is arranged on the side, away from the mounting base, of the guardrail and rotationally arranged on the guardrail. A limiting part for the back plate to abut against is arranged on the cushion, the lower end of the back plate is fixed to the limiting part of the cushion, and the upper end of the back plate is fixed to the guardrail; the guardrail is installed on the luggage barrow, the front end of the guardrail is fixed to the main support through an installation base, and the rear end of the guardrail is supported through a back plate. The utility model provides a guardrail structure of a luggage barrow, which is stable in structure.

Description

Technical Field

[0001] This utility model belongs to the technical field of guardrail structure for luggage carts, and specifically refers to a guardrail structure for luggage carts. Background Technology

[0002] To make it easier to carry clothes and other personal items when traveling or on business trips, people invented suitcases. In the past, most suitcases were carried by hand or on the back. To save effort, suitcases with wheels and pull handles appeared. However, these suitcases were still inconvenient for travelers with young children. Therefore, suitcases gradually evolved into structures with child seats on the pull handles.

[0003] For example, Chinese patent CN202420893234.2 discloses a children's luggage stroller, including a vehicle body and a luggage compartment. The vehicle body includes a main support frame and an auxiliary support frame, both of which have wheels at their lower ends. A seat is fixedly mounted on the main support frame. A hinge seat is provided at the lower end of the luggage compartment. A connecting seat is provided at the lower end of the main support frame, and a wheel rod is fixedly mounted on the connecting seat. Wheels are rotatably mounted at both ends of the wheel rod. The hinge seat can be placed on the wheel rod through its open portion, and the luggage compartment can rotate by relying on the wheel rod as a pivot. The luggage compartment is rotated and placed against the main support frame, thus placing the luggage compartment in an installed state. In the installed state, the luggage compartment is located between the wheel rod and the seat. A latch is provided on the luggage compartment. When the luggage compartment is in the installed state, the latch is opened, and the latch wraps around the main support frame, fixing the luggage compartment and the main support frame together. This product incorporates a safety railing on the main frame to address safety concerns when children are seated on the cushion. However, this railing has some drawbacks: it is suspended from the main frame, and when children exert force to support it, the railing may bend or even break, indicating poor stability. Furthermore, the railing lacks a backrest, making it uncomfortable for children to sit on. Summary of the Invention

[0004] The purpose of this invention is to provide a stable luggage cart guardrail structure.

[0005] The purpose of this utility model is achieved as follows:

[0006] A guardrail structure for a luggage cart includes a frame comprising a main support and an auxiliary support hinged together. Adjusting the positions of the auxiliary support and the main support allows the frame to be held in an unfolded or folded state. Wheels are provided below both the main support and the auxiliary support. A handle is provided on the main support. A seat cushion is fixedly provided on the main support. The cart includes a guardrail, and a mounting base is detachably provided on the main support, with the guardrail connected to the mounting base. A back panel is provided on the side of the guardrail away from the mounting base, and the back panel is rotatably mounted on the guardrail.

[0007] The seat cushion is equipped with a limiting part for the back panel to rest against. The lower end of the back panel is fixed to the limiting part of the seat cushion, and the upper end of the back panel is fixed to the guardrail. The guardrail is installed on the luggage cart. The front end of the guardrail is fixed to the main bracket by the mounting seat, and the rear end of the guardrail is supported by the back panel.

[0008] Furthermore, the limiting part is a groove provided on the seat cushion, and the back plate is provided with a protruding edge that cooperates with the groove, and the protruding edge can extend into the groove.

[0009] Furthermore, a pin is provided at the position of the seat cushion and the groove, and the pin can engage with the back plate or the raised edge; pushing the pin separates it from the back plate / raised edge, so that the raised edge of the back plate can be separated from the groove; including an elastic element, the elastic element provides force for the pin to engage with the back plate or raised edge, and the pin is provided with a pushing part, which is exposed to the outside, and the pin and the pushing part move synchronously.

[0010] Furthermore, the guardrail is provided with an annular groove, and the back plate is rotatably mounted on the annular groove. The side walls on both sides of the annular groove restrict the lateral movement of the back plate.

[0011] Furthermore, the grooves of the first clamping member and the back plate are fixed to each other so as to be sleeved on the outside of the annular groove; the grooves of the first clamping member and / or the back plate are provided with spring buckles, and the annular groove is provided with a recess a that cooperates with the spring buckle. When the spring buckle is located in the recess a, the back plate remains in an unfolded state or a folded state.

[0012] Furthermore, the mounting base includes a mounting base body and a clamp, the clamp being hinged to the mounting base body, and the end of the clamp being fixed to the mounting base body; when the clamp is locked to the mounting base body, the mounting base will hold the main support rod tightly.

[0013] Furthermore, the guardrail is rotatably mounted on the mounting base body, the guardrail is provided with an annular groove, the mounting base body is rotatably mounted on the annular groove, and the side walls on both sides of the annular groove restrict the lateral movement of the back plate; when the guardrail is rotated and in the unfolded state, the main support rod is located inside the guardrail; when the guardrail is rotated and in the retracted state, the guardrail is located on the side of the main support rod away from the seat.

[0014] Furthermore, the grooves of the second clamping member and the mounting base body are fixed to each other so as to be sleeved on the outside of the annular groove; the grooves of the second clamping member and / or the mounting base body are provided with spring buckles, and the annular groove is provided with a recess b that cooperates with the spring buckle. When the spring buckle is located in the recess b, the guardrail remains in an unfolded or folded state.

[0015] Furthermore, the end of the clamp is provided with a buckle or a slot, and the main body of the mounting base is provided with a locking element that cooperates with the buckle or slot, and the elastic element provides a force for the locking element to engage with the buckle or slot.

[0016] Furthermore, the mounting base body is provided with a transverse groove, the opening of which is sealed by a cover. The locking member and the elastic member are sequentially placed into the transverse groove and then sealed by the cover. The mounting base body has a groove for the latch or slot to extend into. The engaging part of the locking member can engage with the latch or slot located in the groove under the action of the elastic member.

[0017] The outstanding and beneficial technical effects of this utility model compared to the prior art are:

[0018] 1. This utility model employs a back panel. When unfolded, the back panel not only provides back support for the user, enhancing user comfort, but also connects the seat cushion and the guardrail, providing support for the guardrail. Specifically, one end of the guardrail is fixed to the main support, while the other end is supported by the back panel, resulting in a more stable structure. In particular, the back panel is movable; when the guardrail is folded for storage, it can also rotate for folding, allowing the guardrail to rest against the frame and reducing its size in the folded state.

[0019] 2. The back panel of this utility model can be inserted into the groove on the seat cushion, thereby ensuring the stability of the back panel under stress. Preferably, a pin is provided at the groove position. Under the action of the elastic element, the locking tongue of the pin can engage with the protruding edge groove that is deep in the groove. The user can push the pushing part of the pin to remove the protruding edge of the back panel from the groove, ensuring the stability of the back panel installation.

[0020] 3. The mounting base of this utility model is fixed to the main bracket by a clamp-like structure, which provides better stability. Furthermore, the mounting base has a transverse groove, within which the locking and elastic components are housed. This built-in structure prevents the locking components from contacting external objects, reducing their risk of damage. Additionally, the clamp's latch or slot must be inserted into the groove to be engaged by the locking components. In the locked state, the locking components and the clamp's latch or slot are all internally contained, preventing them from being bumped by external objects. Children sitting in the seat will not touch the clamp's latch or slot, ensuring stability and safety. Attached Figure Description

[0021] Figure 1 This is one of the structural schematic diagrams of the vehicle frame and guardrail in the unfolded state of this utility model;

[0022] Figure 2 This is the second structural schematic diagram of the vehicle frame and guardrail of this utility model in their unfolded state;

[0023] Figure 3 yes Figure 2 A magnified structural diagram at point A;

[0024] Figure 4 This is a schematic diagram of the internal structure of the vehicle frame and guardrail of this utility model in their unfolded state;

[0025] Figure 5 yes Figure 4 A magnified structural diagram at point B;

[0026] Figure 6 yes Figure 4 A magnified structural diagram at point C;

[0027] Figure 7 This is one of the structural schematic diagrams of the frame and guardrail of this utility model in a folded state;

[0028] Figure 8 This is the second structural schematic diagram of the frame and guardrail of this utility model in a folded state;

[0029] Figure 9 yes Figure 8 A magnified structural diagram at point D;

[0030] Figure 10 This is a schematic diagram of the structure of the removable guardrail according to this utility model;

[0031] Figure 11 This is one of the exploded structural diagrams of the guardrail portion of this utility model;

[0032] Figure 12 yes Figure 11 A magnified structural diagram at point E;

[0033] Figure 13 This is the second exploded structural diagram of the guardrail part of this utility model.

[0034] In the diagram: 1-Frame; 11-Main bracket; 12-Auxiliary bracket; 13-Handle; 14-Seat cushion; 141-Groove; 18-Box body; 19-Wheel; 2-Guardrail; 21-Mounting base body; 211-Transverse groove; 212-Cap; 22-Second clamping member; 221-Mounting base spring buckle; 23-Clamping clamp; 231-Card slot; 27-Annular groove; 28-Recess a; 29-Recess b; 3-Back plate; 30-Protruding edge; 301-Protruding edge groove; 31-Groove of back plate; 311-Back plate spring buckle; 32-First clamping member; 4-Pin; 41-Pushing part; 42-Pin locking tongue; 5-Locking member; 50-Interlocking part; 51-Locking member pushing part; 9-Spring. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Figure 1-13 As shown:

[0036] A luggage cart guardrail structure is disclosed. The frame 1 includes a main support 11 and an auxiliary support 12 hinged together. Adjusting the positions of the auxiliary support 12 and the main support 11 allows the frame to be in an unfolded or folded state. The folding and unfolding structure of the frame is not the focus of this application, therefore it is not described in detail. The folding and unfolding structure of the frame is already a relatively mature product on the market, and this part can be referred to in the prior art CN202420893234.2, CN202420094851.6, etc. Wheels 19 are provided below the main support 11 and the auxiliary support 12. A box 18 is detachably mounted on the main support 11 to form a luggage cart. The shape of the box can be freely selected. Handles 13 are provided on the main support 11. A seat cushion 14 is fixedly mounted on the main support 11.

[0037] The system includes a guardrail 2, a main support 11 with a detachable mounting base, and the guardrail 2 connected to the mounting base. A backplate 3 is located on the side of the guardrail 2 away from the mounting base, and the backplate 3 is rotatably mounted on the guardrail 2. A limiting part is provided on the seat 14 for the backplate to rest against; the lower end of the backplate is fixed to the limiting part of the seat, and the upper end of the backplate is fixed to the guardrail. The guardrail 2 is mounted on the frame, with its front end fixed to the main support via the mounting base, and its rear end supported by the backplate. The backplate serves the following purposes: a) It provides back support for the user, making sitting on the seat more comfortable; b) It supports the guardrail 2. That is, one end of the guardrail is fixed to the main support, and the other end is fixed to the seat via the backplate, making the guardrail more stable; c) As... Figure 7 and Figure 8 As shown, the rotating back plate 3, in its stowed state, can rest against one side of the main support 11.

[0038] The limiting part can be in several ways: Method 1: The limiting part is a slot, and the lower end of the back plate is provided with a buckle that engages with the slot. Method 2: The limiting part is a groove 141 on the seat cushion, and the back plate 3 is provided with a protruding edge 30 that engages with the groove 141, extending into the groove 141. Preferably, a pin 4 and an elastic element are provided at the position of the seat cushion and the groove. The elastic element provides force for the pin 4 to engage with the back plate or the protruding edge 30. A pushing part 41 is fixedly provided or integrally formed on the pin 4. Pushing the pushing part 41 separates the pin locking tongue 42 from the protruding edge groove 301 of the back plate, allowing the protruding edge 30 of the back plate to separate from the groove 141. Both of the above solutions are acceptable, and manufacturers can choose either method for production, as long as the back plate 3 is stably fixed to the seat cushion by the locking structure and the locking structure can be easily unlocked.

[0039] Both the front and rear ends of the guardrail 2 are provided with annular grooves 27. The back plate 3 and the mounting base are rotatably mounted on the corresponding annular grooves 27. The side walls on both sides of the annular grooves restrict the lateral movement of the back plate and the mounting base. The annular grooves provide limiting, making the structure more stable.

[0040] The first clamping member 32 and the groove 31 of the back plate are fixed to each other and thus sleeved on the outside of the annular groove 27; a back plate spring buckle 311 is provided on the groove of the first clamping member and / or the back plate, and a recess a28 that cooperates with the back plate spring buckle 311 is provided on the annular groove. When the back plate spring buckle 311 is located in the recess a28, the back plate 3 remains in an unfolded or folded state. The second clamping member 22 and the groove of the mounting base body are fixed to each other and thus sleeved on the outside of the annular groove; a mounting base spring buckle 221 is provided on the groove of the second clamping member and / or the mounting base body, and a recess b29 that cooperates with the mounting base spring buckle 221 is provided on the annular groove. When the mounting base spring buckle 221 is located in the recess b29, the guardrail 2 remains in an unfolded or folded state.

[0041] Preferably, when the guardrail is rotated and in the extended state, the main support pole is located inside the guardrail; when the guardrail is rotated and in the retracted state, the guardrail is located on the side of the main support pole away from the seat. This arrangement provides more space within the guardrail, making it more comfortable for the user; and when retracted, the guardrail does not interfere with the user's use.

[0042] The mounting base includes a mounting base body 21 and a clamp 23. The clamp 23 is hinged to the mounting base body 21, and its end can be fixed to the mounting base body 21. When the clamp 23 is locked to the mounting base body 21, the mounting base holds the main support rod tightly. The end of the clamp 23 is provided with a latch or slot 231, and the mounting base body 21 is provided with a locking member 5 that cooperates with the latch or slot 231. An elastic member provides a force for the locking member 5 to engage with the latch or slot 231.

[0043] The mounting base body 21 is provided with a transverse slot 211. The opening of the transverse slot 211 is sealed by a cover 212. The locking member 5 and the elastic member are sequentially placed into the transverse slot 211 and then sealed by the cover 212. The mounting base body 21 has a groove for the latch or slot 231 to extend into. The engaging part 50 of the locking member can engage with the latch or slot 231 located in the groove under the action of the elastic member. In the locked state, the locking member 5 and the latch or slot 231 of the clamp are all in a built-in state and will not be collided with by external objects. Children sitting in the seat will not touch the latch or slot of the clamp, which is stable and safe. The locking member pushing part 51 can be an independent component or an integral part of the locking member. The elastic member is preferably a spring 9, soft rubber, or other components.

[0044] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A guardrail structure for a luggage cart, the frame comprising a main support (11) and an auxiliary support (12) hinged together, the position of the auxiliary support (12) and the main support (11) being adjusted to allow the frame (1) to remain in an unfolded or folded state; wheels (19) are provided below both the main support (11) and the auxiliary support (12); a handle (13) is provided on the main support; a seat cushion (14) is fixedly provided on the main support (11); characterized in that: Includes guardrail (2), a mounting base is detachably provided on the main support (11), and the guardrail is connected to the mounting base; a back plate (3) is provided on the side of the guardrail away from the mounting base, and the back plate (3) is rotatably mounted on the guardrail (2); The seat cushion (14) is provided with a limiting part for the back panel to abut against. The lower end of the back panel is fixed on the limiting part of the seat cushion and the upper end of the back panel is fixed on the guardrail. The guardrail (2) is installed on the frame (1). The front end of the guardrail is fixed on the main bracket by the mounting seat and the rear end of the guardrail is supported by the back panel.

2. The guardrail structure of the luggage cart according to claim 1, characterized in that: The limiting part is a groove (141) provided on the seat cushion, and the back plate (3) is provided with a protruding edge (30) that cooperates with the groove (141), and the protruding edge (30) can extend into the groove (141).

3. The guardrail structure of the luggage cart according to claim 2, characterized in that: The seat cushion and the groove are provided with a pin (4), which can engage with the back plate or the protrusion (30); push the pin to separate from the back plate / protrusion, so that the protrusion of the back plate can be separated from the groove; including an elastic element, the elastic element gives the pin a force to engage with the back plate or the protrusion, the pin is provided with a pushing part, the pushing part is exposed, and the pin and the pushing part move synchronously.

4. The guardrail structure of the luggage cart according to claim 1, 2, or 3, characterized in that: The guardrail is provided with an annular groove, and the back plate is rotatably mounted on the annular groove. The side walls on both sides of the annular groove restrict the lateral movement of the back plate.

5. The guardrail structure of the luggage cart according to claim 4, characterized in that: The first clamping member (32) and the groove (31) of the back plate are fixed to each other and thus sleeved on the outside of the annular groove (27); the groove of the first clamping member and / or the back plate is provided with a spring buckle, and the annular groove is provided with a recess a that cooperates with the spring buckle. When the spring buckle is located in the recess a, the back plate remains in an unfolded state or a folded state.

6. The guardrail structure of the luggage cart according to claim 1, 2, 3, or 5, characterized in that: The mounting base includes a mounting base body (21) and a clamp (23). The clamp (23) is hinged to the mounting base body (21), and the end of the clamp can be fixed to the mounting base body (21). When the clamp (23) is locked to the mounting base body (21), the mounting base clamps the rod of the main support.

7. The guardrail structure of the luggage cart according to claim 6, characterized in that: The guardrail (2) is rotatably mounted on the mounting base body (21). The guardrail (2) is provided with an annular groove. The mounting base body is rotatably mounted on the annular groove. The side walls on both sides of the annular groove restrict the lateral movement of the back plate. When the guardrail is rotated and in the unfolded state, the main support rod is located inside the guardrail. When the guardrail is rotated and in the retracted state, the guardrail is located on the side of the main support rod away from the seat.

8. The guardrail structure of the luggage cart according to claim 7, characterized in that: The second clamping member (22) and the groove of the mounting base body are fixed to each other and thus sleeved on the outside of the annular groove; the groove of the second clamping member and / or the mounting base body is provided with a spring buckle, and the annular groove is provided with a recess b that cooperates with the spring buckle. When the spring buckle is located in the recess b, the guardrail remains in an unfolded state or a folded state.

9. The guardrail structure of the luggage cart according to claim 7 or 8, characterized in that: The end of the clamp is provided with a buckle or slot (231), and the main body of the mounting base is provided with a locking member (5) that cooperates with the buckle or slot (231). The elastic member provides a force for the locking member to engage with the buckle or slot.

10. The guardrail structure of the luggage cart according to claim 9, characterized in that: The mounting body (21) is provided with a transverse groove (211). The opening of the transverse groove is sealed by a cover (212). The locking member and the elastic member are placed into the transverse groove in sequence and then sealed by the cover. The mounting body has a groove for the buckle or slot to be inserted. The engaging part of the locking member can engage with the buckle or slot located in the groove under the action of the elastic member.

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