Locking device for folding trolley

Abstract

The utility model belongs to the field of trolleys, and particularly relates to a locking device for a folding trolley, which comprises a support frame, a support plate assembled on the support frame, an adjusting shaft lever assembled on the support frame, an adjusting sleeve assembled on the adjusting shaft lever, a support cylindrical frame assembled on the adjusting sleeve, and a folding locking mechanism assembled on the support cylindrical frame. The folding locking mechanism comprises a mounting block, the mounting block is provided with a fixed block, the fixed block is assembled with the supporting frame, the mounting block is provided with a traction arc opening, the mounting block is provided with a rotating rod, the rotating rod is provided with a push plate, the rotating rod is provided with a pedal, the push plate is provided with a connecting plate, the connecting plate is provided with an assembling hole, the mounting block is provided with a movable rod, and the movable rod is provided with a buckle plate. According to the locking device for the folding trolley, the problems that through cooperation of the pedal and the buckle plate, the form of the trolley is single in the using process, and the trolley is difficult to fold are solved.

Description

Technical Field

[0001] This utility model relates to the field of handcarts, specifically a locking device for folding handcarts. Background Technology

[0002] Shopping carts are primarily used to help people easily move items, especially in shopping scenarios, greatly reducing their burden. Whether it's fresh, crisp vegetables, tempting fruits, or various household goods, they can all be carried steadily. For the elderly, as they age and their physical strength declines, carrying heavy shopping bags becomes very strenuous; the emergence of shopping carts has solved this problem perfectly, allowing them to easily pull their items home, saving effort and time. For young people, small carts also play an important role in moving heavy or bulky items, making the task easier and faster.

[0003] However, the existing handcarts still have the following problems in use:

[0004] Existing handcarts have a relatively simple form in use and cannot be adjusted according to the amount of goods, making them difficult to fold and inconvenient to operate. Therefore, it is necessary to develop a locking device for folding handcarts for use in the existing handcart industry. Utility Model Content

[0005] To address the shortcomings of existing technologies, which are limited in form and cannot be adjusted according to the amount of goods, making folding the trolley difficult and inconvenient to operate, this invention proposes a locking device for folding trolleys.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a locking device for a folding handcart, comprising:

[0007] A support frame is provided, with a support plate fixedly mounted at its bottom. Drive wheels are symmetrically mounted on the support frame, close to the support plate. Adjusting shafts are symmetrically and movably mounted on the support frame, with an adjusting sleeve fixedly mounted at one end of each shaft. A supporting cylindrical frame is movably mounted on the adjusting sleeve. Auxiliary wheels are mounted at the bottom of each supporting cylindrical frame, close to and above the drive wheels. Operating blocks are fixedly mounted on each supporting cylindrical frame, with two operating blocks respectively close to the auxiliary wheels. A connecting rod is fixedly mounted between the two operating blocks. Operating plates are symmetrically and fixedly mounted on the upper side of the support frame, located on one side of the supporting cylindrical frame.

[0008] A folding locking mechanism includes a mounting block, on which a fixing block is fixedly mounted. The fixing block is fixedly mounted to the support frame, and the mounting block is located on one side of the support cylindrical frame. Each mounting block is provided with a traction arc opening. Each mounting block is movably mounted with a movable rod on its inner wall. Each movable rod is fixedly mounted with a buckle plate. Each buckle plate is provided with a latch, which is close to the traction arc opening and engages with the connecting rod.

[0009] A stabilizing mechanism, comprising an assembly block fixedly mounted on the back of the operating panel.

[0010] Preferably, the traction arc and the connecting rod are movably assembled, and a rotating rod is movably assembled on each of the two mounting blocks. A push plate is fixedly assembled on each of the rotating rods. The push plate is located inside the mounting block. The top of the snap-on plate fits against the bottom of the push plate. A pedal is fixedly assembled on the rotating rod. The pedal is located between the two mounting blocks. A connecting plate is fixedly assembled on the end face of each push plate. Each connecting plate is provided with an assembly hole.

[0011] Preferably, each of the buckle plates is fixedly fitted with an assembly rod, and a telescopic spring is fixedly fitted on the assembly rod and the assembly hole.

[0012] Preferably, the upper side of the support frame is symmetrically fixedly equipped with an operation plate, which is located on one side of the supporting cylindrical frame. Each operation plate is fixedly equipped with a first card plate and a second card plate, and each of the first and second card plates is provided with a card slot.

[0013] Preferably, the adjusting shaft is located in the slots of the first and second plates, so that the supporting cylindrical frame can be inserted into the slots of the first and second plates respectively.

[0014] Preferably, each end face of the operation panel is provided with a first mounting port and a second mounting port. Handles are symmetrically fixedly mounted on the upper surface of the supporting cylindrical frame, and rubber anti-collision pads are symmetrically fixedly mounted on the upper surface of the supporting cylindrical frame, with the rubber anti-collision pads close to the handles.

[0015] Preferably, the support cylindrical frame is fixedly equipped with clamping rods, all of which are close to the auxiliary wheel, and the operating block is provided with threaded holes.

[0016] Preferably, when the second mounting port of the operating plate engages with the locking rod, the first mounting port communicates with the threaded hole, and fastening bolts are threaded onto the first mounting port and the threaded hole of the operating block.

[0017] The advantages of this utility model are:

[0018] When the device is not in use, this invention requires the user to press down on the pedal. The pedal drives the rotating rod to rotate, which in turn causes the push plate to deflect. Under the elastic force of the telescopic spring, the push plate pushes the latch plate downward. The latch plate deflects through the movable rod, bringing the latch closer to the traction arc. The adjusting shaft deflects on the support frame, causing the supporting cylindrical frame to drive the connecting rod on the operating block to deflect. The deflected connecting rod moves between the traction arc and the latch. When the pedal is released, the elastic force of the telescopic spring returns the latch plate to its original position on the movable rod, changing the position of the latch on the traction arc. The combined force of the traction arc and the latch engages the connecting rod, facilitating the folding of the auxiliary wheels and making storage convenient. This allows the handcart to be easily folded and its usage configuration to be adjusted according to the amount of goods, improving operational efficiency. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the assembly structure of the handcart, folding locking mechanism, and stabilizing mechanism of this utility model.

[0021] Figure 2 This is a schematic diagram of the assembly structure of the handcart, folding locking mechanism, and stabilizing mechanism of this utility model.

[0022] Figure 3 This is a schematic diagram of the assembly structure of the handcart, folding locking mechanism, and stabilizing mechanism of this utility model.

[0023] Figure 4 This is a cross-sectional view of the auxiliary wheel and folding locking mechanism assembly of this utility model.

[0024] Figure 5 This is a cross-sectional view of the stabilizing mechanism of this utility model.

[0025] In the picture:

[0026] 10. Support frame; 11. Support plate; 12. Drive wheel; 13. Control panel;

[0027] 20. Adjusting shaft; 21. Supporting cylindrical frame; 22. Handle; 23. Auxiliary wheel;

[0028] 30. Pedal; 31. First assembly port; 32. Second assembly port; 33. First clamping plate;

[0029] 40. Second card plate; 41. Card slot; 42. Operating block; 43. Connecting rod;

[0030] 50. Folding locking mechanism; 5001. Mounting block; 5002. Fixing block; 5003. Traction arc; 5004. Rotating rod; 5005. Push plate; 5006. Connecting plate; 5007. Assembly hole; 5008. Movable rod; 5009. Buckle plate; 5010. Bayonet; 5011. Assembly rod; 5012. Telescopic spring.

[0031] 51. Adjusting sleeve; 52. Rubber anti-collision pad; 53. Threaded hole;

[0032] 60. Fastening bolts; 61. Clamping rods. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0034] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0035] This application discloses a locking device for a folding handcart. (Refer to...) Figure 1 and Figure 4 and Figure 5A locking device for a folding trolley includes a support frame 10, with a support plate 11 fixedly mounted at the bottom of the support frame 10. Drive wheels 12 are symmetrically mounted on the support frame 10, with the drive wheels 12 close to the support plate 11. Adjusting shafts 20 are symmetrically and movably mounted on the support frame 10, with an adjusting sleeve 51 fixedly mounted at one end of each adjusting shaft 20. A supporting cylindrical frame 21 is movably mounted on the adjusting sleeve 51, and auxiliary wheels 23 are mounted at the bottom of each supporting cylindrical frame 21, with the auxiliary wheels 23 close to the drive wheels 12. Above the drive wheel 12, each of the supporting cylindrical frames 21 is fixedly equipped with an operating block 42. Two operating blocks 42 are respectively close to the auxiliary wheel 23, and a connecting rod 43 is fixedly installed between the two operating blocks 42. Each of the supporting cylindrical frames 21 is equipped with a folding locking mechanism 50, which includes a mounting block 5001. Each mounting block 5001 is fixedly equipped with a fixing block 5002. The fixing blocks 5002 are fixedly assembled to the support frame 10, and the mounting blocks 5001 are located on one side of the supporting cylindrical frame 21. Each mounting block 5001 is equipped with a traction arc 5003, which is movably assembled with the connecting rod 43. Rotating rods 5004 are movably assembled on both mounting blocks 5001. Push plates 5005 are fixedly mounted on each rotating rod 5004, located inside the mounting block 5001. A pedal 30 is fixedly mounted on each rotating rod 5004, located between the two mounting blocks 5001. Connecting plates 5006 are fixedly mounted on the end faces of each push plate 5005, and each connecting plate 5006 has mounting holes 5007. The inner wall of the mounting block 5001 is movably fitted with movable rods 5008. Each movable rod 5008 is fixedly fitted with a buckle plate 5009. The top of the buckle plate 5009 fits against the bottom of the push plate 5005. Each buckle plate 5009 is fixedly fitted with an assembly rod 5011. Each assembly rod 5011 and assembly hole 5007 is fixedly fitted with a telescopic spring 5012. Each buckle plate 5009 is provided with a latch 5010. The latch 5010 is close to the traction arc 5003 and latches the connecting rod 43.

[0036] In this invention, when the equipment is not in use, the foot is used to press down on the pedal 30. The pedal 30 drives the rotating rod 5004 to rotate, causing the rotating rod 5004 to drive the push plate 5005 to deflect. Under the elastic force of the telescopic spring 5012, the push plate 5005 pushes the buckle plate 5009 to move downward. The buckle plate 5009 deflects through the movable rod 5008, and the latch 5010 approaches the traction arc 5003. The adjusting shaft 20 deflects on the support frame 10, causing the supporting cylindrical frame 21 to move downward. The connecting rod 43 on the moving operation block 42 is deflected, and the deflected connecting rod 43 moves on the traction arc 5003 and the latch 5010. At this time, the pedal 30 is released, and under the elastic reset condition of the telescopic spring 5012, the buckle plate 5009 is deflected on the moving rod 5008, and the latch 5010 changes position on the traction arc 5003. Under the combined force of the traction arc 5003 and the latch 5010, the connecting rod 43 is latched, which facilitates the folding of the auxiliary wheel 23 and makes it easy to store.

[0037] Reference Figures 1-3 An operating plate 13 is symmetrically fixedly mounted on the upper side of the support frame 10. The operating plate 13 is located on one side of the supporting cylindrical frame 21. A first locking plate 33 and a second locking plate 40 are fixedly mounted on the operating plate 13. The first locking plate 33 and the second locking plate 40 are provided with a slot 41. The adjusting shaft 20 is located in the slot 41 of the first locking plate 33 and the slot 41 of the second locking plate 40, so that the supporting cylindrical frame 21 can be inserted into the slot 41 of the first locking plate 33 and the slot 41 of the second locking plate 40 respectively. The end face of the operating plate 13 is provided with a first mounting port 31 and a second mounting port 32. A handle 22 is symmetrically fixedly mounted on the upper surface of the supporting cylindrical frame 21. Rubber anti-collision pads 52 are symmetrically fixedly mounted on the upper surface of the supporting cylindrical frame 21. The rubber anti-collision pads 52 are close to the handle 22.

[0038] In this utility model, the support cylindrical frame 21 is deflected by adjusting the shaft 20, so that the slot 41 on the first card plate 33 and the slot 41 on the second card plate 40 respectively insert into the support cylindrical frame 21, so that the support cylindrical frame 21 can be positioned and deflected.

[0039] Reference Figure 3 A locking rod 61 is fixedly mounted on the supporting cylindrical frame 21. The locking rods 61 are all close to the auxiliary wheel 23. The operating block 42 is provided with threaded holes 53. When the second mounting port 32 of the operating plate 13 is engaged with the locking rod 61, the first mounting port 31 is connected to the threaded hole 53. Fastening bolts 60 are threaded on the first mounting port 31 and the threaded hole 53 of the operating block 42.

[0040] In this utility model, the support cylindrical frame 21 can move on the adjusting sleeve 51, which changes the usage form of the device. When the second assembly port 32 of the operating plate 13 is engaged with the locking rod 61, the first assembly port 31 is connected to the threaded hole 53. Fastening bolts 60 are installed on the threaded holes 53 of the operating blocks of the first assembly port 31 and 42 to facilitate pushing the goods.

[0041] Working principle: When the equipment is not in use, the pedal 30 is pressed down with the foot. The pedal 30 drives the rotating rod 5004 to rotate, which in turn causes the push plate 5005 to deflect. Under the elastic force of the telescopic spring 5012, the push plate 5005 pushes the latch plate 5009 downward. The latch plate 5009 deflects through the movable rod 5008, and the latch 5010 approaches the traction arc 5003. The adjusting shaft 20 deflects on the support frame 10, causing the supporting cylindrical frame 21 to drive the connecting rod 43 on the operating block 42 to deflect. The deflected connecting rod 43 moves on the traction arc 5003 and the latch 5010. At this time, the pedal 30 is released, and under the elastic return of the telescopic spring 5012, the latch plate 5009 deflects on the movable rod 5008. The position of the bayonet 5010 on the traction arc 5003 changes, so that the connecting rod 43 is engaged under the combined force of the traction arc 5003 and the bayonet 5010, which facilitates the folding of the auxiliary wheel 23 and makes it easy to store. At the same time, the supporting cylindrical frame 21 is deflected by the adjusting shaft 20, so that the slots 41 on the first clamping plate 33 and the second clamping plate 40 respectively engage with the supporting cylindrical frame 21, so that the supporting cylindrical frame 21 can be positioned and deflected. The supporting cylindrical frame 21 can move on the adjusting sleeve 51, which changes the usage mode of the device. When the second assembly port 32 of the operating plate 13 is engaged with the clamping rod 61, the first assembly port 31 is connected to the threaded hole 53. Fastening bolts 60 are installed on the first assembly port 31 and the threaded hole 53 of the operating block 42 to facilitate the pushing of goods.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A locking device for a folding handcart, characterized in that: include: A support frame (10) is provided, with a support plate (11) fixedly mounted at its bottom. Drive wheels (12) are symmetrically mounted on the support frame (10) and are close to the support plate (11). Adjusting shafts (20) are symmetrically and movably mounted on the support frame (10). An adjusting sleeve (51) is fixedly mounted at one end of each adjusting shaft (20). A supporting cylindrical frame (21) is movably mounted on the adjusting sleeve (51). Auxiliary wheels are mounted at the bottom of each supporting cylindrical frame (21). (23) The auxiliary wheel (23) is close to the active wheel (12) and the auxiliary wheel (23) is located above the active wheel (12). The support cylindrical frame (21) is fixedly equipped with an operating block (42). The two operating blocks (42) are close to the auxiliary wheel (23) respectively. The two operating blocks (42) are fixedly equipped with a connecting rod (43) between them. The upper side of the support frame (10) is symmetrically equipped with an operating plate (13). The operating plate (13) is located on one side of the support cylindrical frame (21). Folding locking mechanism (50), the folding locking mechanism (50) includes mounting block (5001), fixing block (5002) is fixedly mounted on mounting block (5001), fixing block (5002) is fixedly mounted with support frame (10), and mounting block (5001) is located on one side of support cylindrical frame (21), traction arc mouth (5003) is provided on mounting block (5001), movable rod (5008) is movably mounted on inner wall of mounting block (5001), buckle plate (5009) is fixedly mounted on movable rod (5008), buckle plate (5009) is provided with buckle slot (5010), buckle slot (5010) is close to traction arc mouth (5003), and buckle slot (5010) engages with connecting rod (43).

2. The locking device for a folding handcart according to claim 1, characterized in that: The traction arc (5003) is movably assembled with the connecting rod (43). Rotating rods (5004) are movably assembled on the two mounting blocks (5001). Push plates (5005) are fixedly assembled on the rotating rods (5004). The push plates (5005) are located inside the mounting blocks (5001). The top of the buckle plate (5009) is in contact with the bottom of the push plate (5005). A pedal (30) is fixedly assembled on the rotating rods (5004). The pedal (30) is located between the two mounting blocks (5001). A connecting plate (5006) is fixedly assembled on the end face of the push plate (5005). The connecting plate (5006) is provided with mounting holes (5007).

3. A locking device for a folding handcart according to claim 2, characterized in that: Each buckle plate (5009) is fixedly equipped with an assembly rod (5011), and a telescopic spring (5012) is fixedly equipped on the assembly rod (5011) and the assembly hole (5007).

4. A locking device for a folding handcart according to claim 1, characterized in that: The upper side of the support frame (10) is symmetrically fixedly equipped with an operation plate (13). The operation plate (13) is located on one side of the support cylindrical frame (21). The operation plate (13) is fixedly equipped with a first card plate (33) and a second card plate (40). The first card plate (33) and the second card plate (40) are both provided with card slots (41).

5. A locking device for a folding handcart according to claim 4, characterized in that: The adjusting shaft (20) is located in the slot (41) of the first card plate (33) and the slot (41) of the second card plate (40), so that the supporting cylindrical frame (21) can be inserted into the slot (41) of the first card plate (33) and the slot (41) of the second card plate (40) respectively.

6. A locking device for a folding handcart according to claim 4, characterized in that: The end face of the operation plate (13) is provided with a first assembly port (31) and the end face of the operation plate (13) is provided with a second assembly port (32). The upper surface of the support cylinder frame (21) is symmetrically fixedly fitted with handles (22) and the upper surface of the support cylinder frame (21) is symmetrically fixedly fitted with rubber anti-collision pads (52). The rubber anti-collision pads (52) are close to the handles (22).

7. A locking device for a folding handcart according to claim 6, characterized in that: The support cylindrical frame (21) is fixedly equipped with a clamping rod (61), which is close to the auxiliary wheel (23). The operating block (42) is provided with a threaded hole (53).

8. A locking device for a folding handcart according to claim 7, characterized in that: When the second assembly port (32) of the operating plate (13) is engaged with the locking rod (61), the first assembly port (31) is connected to the threaded hole (53), and fastening bolts (60) are threaded on the first assembly port (31) and the threaded hole (53) of the operating block (42).

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