An adjustable height trolley handle

Abstract

The utility model relates to the technical field of handcart, and disclose a kind of adjustable height handcart handrail, comprising: the vehicle plate main body, four gyro wheels are fixedly installed in the vehicle plate main body bottom;Two connecting plates are fixedly installed in the vehicle plate main body top end;Rotary shaft is rotatably connected in two connecting plates interior;Two vertical boards are fixedly sleeved in rotary shaft outside;Horizontal plate is fixedly installed in two vertical board top end;Two telescopic plates are fixedly sleeved in rotary shaft outside;Two slides are respectively slidably connected in two telescopic plate interior;The adjustable height handcart handrail, height is adjusted flexible and stable: through the close sliding fit of telescopic plate and slide, in combination with the accurate locking design of bolt, both can realize the free adjustment of handrail height to adapt to different height users or high goods carrying demand, can also avoid component shaking in the adjustment process, guarantee the structure firm after locking, improve use safety.

Description

Technical Field

[0001] This utility model relates to the field of handcart technology, specifically to an adjustable height handcart handle. Background Technology

[0002] Most handcart handles on the market are of fixed height and cannot be flexibly adjusted according to the user's height or the height of the goods being moved. This results in taller users having to bend over to hold the handle, and the handle obstructing operation when the goods are too high, which affects both user comfort and moving efficiency.

[0003] While some adjustable handrails can adjust height, they often suffer from large gaps in the telescopic components, leading to wobbling during adjustment and poor stability when locked, posing safety hazards. Furthermore, most trolley handrails lack angle adjustment and folding functions, taking up significant space when not in use and making storage and transportation inconvenient. In addition, some adjustable structures suffer from unreasonable component layouts, making them prone to interference during movement or causing concentrated stress, resulting in rapid localized wear and a short lifespan. This makes it difficult to balance practicality, stability, and durability, failing to meet diverse usage needs. Utility Model Content

[0004] In view of the shortcomings of the prior art, this utility model provides an adjustable height handrail for a trolley to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: An adjustable height handrail for a trolley, comprising: The vehicle body has four rollers fixedly installed at its bottom. Two connecting plates are fixedly installed on the top of the vehicle body; a rotating shaft is rotatably connected inside the two connecting plates; Two vertical plates are fixedly sleeved on the outside of the rotating shaft; a horizontal plate is fixedly installed on the top of the two vertical plates; Two telescopic plates are fixedly sleeved on the outside of the rotating shaft; Two sliding plates are slidably connected inside the two telescopic plates, respectively; An extension plate, which is fixedly installed on the top of the two slide plates; Two bolts are threaded into the interior of the two telescopic plates, respectively.

[0006] Furthermore, it also includes: A limiting block is fixedly installed on the top of the vehicle body; An annular plate is fixedly installed on the top of the limiting block; An insert plate is movably inserted inside the limiting block; A socket is provided inside the rotating shaft, and the insert plate is adapted to the socket.

[0007] Furthermore, the inner wall of the telescopic plate is fitted to the outer wall of the slide plate.

[0008] Furthermore, one end of the bolt extends into the interior of the telescopic plate and is correspondingly positioned to correspond with the sliding plate.

[0009] Furthermore, the two vertical plates are symmetrically distributed on both sides of the bottom of the horizontal plate.

[0010] Furthermore, the two telescopic plates are located on the outside of the two vertical plates respectively.

[0011] Furthermore, the length of the insert plate is greater than the thickness of the limiting block, and the diameter of the insert plate is adapted to the diameter of the insertion hole.

[0012] Furthermore, the extension plate is arranged parallel to the horizontal plate, and the length of the extension plate is the same as the length of the horizontal plate.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. The height-adjustable handrail of this trolley is flexible and stable in height adjustment: through the close sliding cooperation between the telescopic plate and the sliding plate, combined with the precise locking design of the bolts, the height of the handrail can be freely adjusted to suit the needs of users of different heights or the handling of taller goods, while avoiding the shaking of parts during the adjustment process, ensuring the structural stability after locking, and improving the safety of use.

[0014] 2. The height-adjustable handrail of this trolley is practical in terms of angle and folding function: With the matching interlocking structure of the insert plate and the socket, the rotation of the pivot can be easily released or locked. It can flexibly adjust the tilt angle of the handrail to optimize the grip and force application experience, and can also fold the handrail to fit the main body of the trolley, reducing the space occupied when not in use and improving the convenience of use and storage.

[0015] 3. The height-adjustable handrail of this trolley is evenly stressed and durable: the vertical plates are symmetrically distributed at the bottom of the horizontal plates, which can evenly transmit the gripping force to the pivot and avoid local stress concentration that could lead to deformation; the design of the telescopic plate fitting with the slide plate and the insertion plate fitting with the insertion hole reduces the gaps and wear between components and extends the service life of the overall structure.

[0016] 4. The height-adjustable trolley handle provides a superior grip experience: the extension plate is parallel to the horizontal plate and has the same length, ensuring that the grip range and the direction of force on the hand are consistent before and after height adjustment, avoiding grip discomfort caused by structural deviations, adapting to grip needs in different usage scenarios, and improving user comfort.

[0017] 5. The adjustable height handrail has a reasonable and compact structure: the telescopic plate is located on the outside of the vertical plate to avoid interference between parts. While realizing multiple functions such as height adjustment, angle adjustment, and folding, it ensures that the overall structure is simple and compact, does not take up too much extra space, and takes into account both functionality and practicality.

[0018] 2. The height-adjustable handrail of this trolley. Attached Figure Description Figure 1 This is a three-dimensional structural schematic diagram of the present utility model; Figure 2 This is a side view of the structure of this utility model; Figure 3 This is a three-dimensional schematic diagram of the horizontal plate and related structures of this utility model.

[0019] In the diagram: 1. Main body of the vehicle platform; 2. Roller; 3. Connecting plate; 4. Rotating shaft; 5. Vertical plate; 6. Horizontal plate; 7. Telescopic plate; 8. Slide plate; 9. Extension plate; 10. Bolt; 11. Limiting block; 12. Ring plate; 13. Insert plate; 14. Insertion hole. Detailed Implementation

[0020] 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 protection scope of the present utility model.

[0021] Example: Please refer to the following: Figure 1-3 , An adjustable height handrail for a trolley, comprising: The main body of the vehicle platform 1 has four rollers 2 fixedly installed at its bottom. Two connecting plates 3 are fixedly installed on the top of the vehicle body 1; a rotating shaft 4 is rotatably connected inside the two connecting plates 3; Two vertical plates 5 are fixedly sleeved on the outside of the rotating shaft 4; a horizontal plate 6 is fixedly installed on the top of the two vertical plates 5. Two telescopic plates 7 are fixedly sleeved on the outside of the rotating shaft 4; Two skateboards 8 are slidably connected inside two telescopic plates 7; Extension plate 9 is fixedly installed on the top of the two slide plates 8; Two bolts 10 are threaded into the interior of the two telescopic plates 7 respectively; Specifically, the main body 1 of the cart is the load-bearing foundation of the overall structure. The four rollers 2 at the bottom provide rolling support for the movement of the handcart, realizing the overall displacement of the device. The two connecting plates 3 at the top of the main body 1 provide rotation mounting fulcrums for the rotating shaft 4, allowing the rotating shaft 4 to rotate around the connecting plates 3. The two vertical plates 5 fixed on the outside of the rotating shaft 4 and the top horizontal plate 6 form the basic handrail grip structure for users to grip and push. At the same time, the two telescopic plates 7 fixed on the outside of the rotating shaft 4 and the internally sliding plate 8 form a height-adjustable telescopic structure. The extension plate 9 at the top of the plate 8 can extend the height of the handrail as the plate 8 moves. The bolts 10 connected by the threads inside the telescopic plate 7 can limit or release the plate 8 by tightening or loosening the threads, providing a guarantee for locking or adjusting operations after height adjustment. In the embodiment, it also includes: Limiting block 11 is fixedly installed on the top of vehicle body 1; An annular plate 12 is fixedly installed on the top of the limiting block 11; Insert plate 13 is movably inserted inside limit block 11; The socket 14 is located inside the rotating shaft 4, and the insert plate 13 is adapted to the socket 14. Specifically, the limiting block 11 is fixed to the top of the vehicle body 1, and its top ring plate 12 can guide the movement of the insert plate 13. The insert plate 13 is movably inserted into the limiting block 11 and is adapted to the insertion hole 14 on the rotating shaft 4. When the armrest needs to be folded, the insert plate 13 is pulled up to disengage it from the insertion hole 14, thereby releasing the rotation restriction on the rotating shaft 4. At this time, the vertical plate 5 can be rotated around the connecting plate 3 to drive the armrest to fold. When the tilt angle of the armrest needs to be adjusted, the insert plate 13 is pulled out in the same way, and the horizontal plate 6 is rotated to drive the vertical plate 5 and the rotating shaft 4 to rotate to a suitable tilt angle. Then the insert plate 13 is inserted into the insertion hole 14. The rotating shaft 4 is positioned by the engagement of the insert plate 13 and the insertion hole 14, thereby fixing the tilt state of the armrest. In this embodiment: the inner wall of the telescopic plate 7 is fitted to the outer wall of the sliding plate 8; Specifically, the inner wall of the telescopic plate 7 and the outer wall of the slide plate 8 are designed to fit together. This eliminates the gap between them and prevents the slide plate 8 from swaying laterally when adjusting its height inside the telescopic plate 7. The fitted structure ensures that the slide plate 8 can only move vertically along the inner wall of the telescopic plate 7, ensuring the stability of the handrail structure during height adjustment. This prevents the user from having an unstable grip or a decrease in adjustment accuracy due to component wobbling, while also reducing wear caused by gaps between components and extending service life. In this embodiment: one end of the bolt 10 extends into the interior of the telescopic plate 7 and is correspondingly positioned to correspond with the slide plate 8; Specifically, one end of the limiting bolt 10 extends into the telescopic plate 7 and is correspondingly positioned with the slide plate 8. This structural design ensures that the bolt 10 can effectively contact and press the slide plate 8. When it is necessary to lock the position of the slide plate 8, tighten the bolt 10, and the end of the bolt 10 extending into the telescopic plate 7 can directly abut against the outer wall of the slide plate 8, restricting the sliding of the slide plate 8 through friction. When it is necessary to adjust the height, loosen the bolt 10, and the end of the bolt 10 disengages from the slide plate 8, releasing the friction restriction and allowing the slide plate 8 to slide freely. This setting directly determines the effectiveness of the locking function and avoids locking failure due to the bolt 10's inability to contact the slide plate 8. In the embodiment: two vertical plates 5 are symmetrically distributed on both sides of the bottom of the horizontal plate 6; Specifically, two vertical plates 5 are symmetrically distributed on both sides of the bottom of the horizontal plate 6. The core purpose is to evenly distribute the force on the horizontal plate 6 to the two vertical plates 5. When the user holds the horizontal plate 6 and pushes the trolley, the horizontal plate 6 will be subjected to pushing or pulling forces. The symmetrically distributed vertical plates 5 can evenly distribute the force to the pivot 4, avoiding deformation caused by excessive local stress on a single vertical plate 5 or pivot 4 due to force concentration. This ensures the load-bearing strength and service life of the handrail's basic structure, while also ensuring that the handrail remains horizontal and stable during use and prevents tilting. In the embodiment: the two telescopic plates 7 are located on the outside of the two vertical plates 5 respectively; Specifically, the two telescopic plates 7 are located on the outside of the two vertical plates 5 respectively. This layout design is mainly to avoid interference between the telescopic plates 7 and the vertical plates 5 during movement. The vertical plates 5 need to rotate with the pivot 4 to achieve the folding or tilting of the handrail, while the telescopic plates 7 are used to support the skateboard 8 to achieve height adjustment. By placing the telescopic plates 7 on the outside of the vertical plates 5, the two can operate independently without affecting each other when the vertical plates 5 rotate and the skateboard 8 extends and retracts. At the same time, it makes reasonable use of the space outside the pivot 4 to ensure that the overall structure is compact and avoids structural bulkiness or movement stagnation caused by overlapping parts. In the embodiment: the length of the insert plate 13 is greater than the thickness of the limiting block 11, and the diameter of the insert plate 13 is adapted to the diameter of the insertion hole 14. Specifically, by limiting the length of the insert plate 13 to be greater than the thickness of the limiting block 11 and the diameter to match the diameter of the insertion hole 14, the positioning reliability of the insert plate 13 is ensured; the length of the insert plate 13 to be greater than the thickness of the limiting block 11 ensures that the insert plate 13 can penetrate the limiting block 11 and penetrate the insertion hole 14 simultaneously when inserted, forming a sufficient engagement depth and avoiding accidental dislodgement due to shallow insertion; the diameter of the insert plate 13 to match the diameter of the insertion hole 14 can eliminate the gap between the two, prevent the insert plate 13 from shaking in the insertion hole 14, ensure the stable positioning effect of the rotating shaft 4, and avoid the angle deviation of the handrail due to the loosening of the insert plate 13 during use; In the embodiment: the extension plate 9 is arranged parallel to the horizontal plate 6, and the length of the extension plate 9 is the same as the length of the horizontal plate 6; Specifically, the extension plate 9 and the horizontal plate 6 are parallel and of the same length. From the perspective of user experience and structural function, the parallel setting can ensure that the force direction of the user's hand is consistent when holding the extension plate 9 or the horizontal plate 6, avoiding discomfort caused by angle deviation. The consistent length makes the overall appearance of the armrest symmetrical and coordinated, and at the same time ensures that the extension plate 9 can still maintain the same grip range as the horizontal plate 6 after the height is extended, meeting the grip needs of users of different heights and ensuring the uniformity of the armrest function and the convenience of use after the height is adjusted. Working principle: The main body 1 of the cart serves as the core load-bearing foundation. Four rollers 2 at its bottom provide rolling support for the overall movement of the cart, while two connecting plates 3 at the top provide rotation fulcrums for the pivot 4. Two symmetrically distributed vertical plates 5 fixed to the outside of the pivot 4, along with the top horizontal plate 6, form the basic handrail grip structure for the user to hold and apply force. Simultaneously, two telescopic plates 7 located outside the pivot 4 and on the outside of the vertical plates 5, together with the internally sliding slide plate 8, form a height-adjustable telescopic structure. An extension plate 9 at the top of the slide plate 8, parallel and of equal length to the horizontal plate 6, can extend the handrail height as the slide plate 8 moves. Bolts 10, threaded inside the telescopic plates 7, extend one end into the telescopic plate 7 and correspond to the slide plate 8; when tightened, they can... The sliding plate 8 is locked when pressed against it, and can be released to adjust the height when loosened. In addition, the limiting block 11 fixed at the top of the main body 1 has a ring plate 12 at the top that guides the movable insert plate 13. The length of the insert plate 13 is greater than the thickness of the limiting block 11 and its diameter is adapted to the insertion hole 14 on the rotating shaft 4. Pulling out the insert plate 13 can release the restriction on the rotating shaft 4, making it easier to rotate the vertical plate 5 to drive the armrest to fold or adjust the tilt angle. When inserted, the rotating shaft 4 can be positioned by locking, ensuring the stability of the armrest angle. The overall structure not only ensures the stability of height adjustment, the effectiveness of locking and the reliability of angle adjustment, but also improves the comfort and functional unity of use through the rational layout of components and the design of the grip structure.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A height-adjustable handrail for a trolley, characterized in that, include: The vehicle body (1) has four rollers (2) fixedly installed at the bottom. Two connecting plates (3) are fixedly installed on the top of the vehicle body (1); a rotating shaft (4) is rotatably connected to the inside of the two connecting plates (3); Two vertical plates (5) are fixedly sleeved on the outside of the rotating shaft (4); a horizontal plate (6) is fixedly installed on the top of the two vertical plates (5); Two telescopic plates (7) are fixedly sleeved on the outside of the rotating shaft (4); Two sliding plates (8) are slidably connected inside the two telescopic plates (7); An extension plate (9) is fixedly mounted on the top of the two slide plates (8); Two bolts (10) are threaded into the interior of the two telescopic plates (7), respectively.

2. The height-adjustable handrail for a trolley according to claim 1, characterized in that, Also includes: A limiting block (11) is fixedly installed on the top of the vehicle body (1); An annular plate (12) is fixedly installed on the top of the limiting block (11); Insert plate (13), which is movably inserted inside the limiting block (11); A socket (14) is provided inside the rotating shaft (4), and the insert plate (13) is adapted to the socket (14).

3. The height-adjustable handrail for a trolley according to claim 1, characterized in that, The inner wall of the telescopic plate (7) is fitted to the outer wall of the sliding plate (8).

4. The height-adjustable handrail for a trolley according to claim 1, characterized in that, One end of the bolt (10) extends into the interior of the telescopic plate (7) and is correspondingly positioned to correspond with the slide plate (8).

5. The height-adjustable handrail for a trolley according to claim 1, characterized in that, The two vertical plates (5) are symmetrically distributed on both sides of the bottom of the horizontal plate (6).

6. The height-adjustable handrail for a trolley according to claim 1, characterized in that, The two telescopic plates (7) are located on the outside of the two vertical plates (5).

7. The height-adjustable handrail for a trolley according to claim 2, characterized in that, The length of the insert plate (13) is greater than the thickness of the limiting block (11), and the diameter of the insert plate (13) is adapted to the diameter of the insertion hole (14).

8. The height-adjustable handrail for a trolley according to claim 1, characterized in that, The extension plate (9) is arranged parallel to the horizontal plate (6), and the length of the extension plate (9) is the same as the length of the horizontal plate (6).

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