Flat plate trolley with telescopic handle

Abstract

The utility model discloses a flat trolley with a telescopic handle, which relates to the technical field of trolleys and comprises a trolley body, a handle fixed on one side of the trolley body, an elastic rod and a grip. The elastic rod comprises a fixed cylinder and a telescopic rod; a limiting structure is arranged between the fixed cylinder and the telescopic rod; one-way self-locking is formed between the positioning pin and the positioning groove; a grip is fixed to the top of the telescopic rod. The elastic rod is arranged, so that the height of the grip can be adjusted according to the height of a user, and the flat plate trolley is more convenient to use; the limiting structure is arranged, the limiting structure comprises the positioning grooves evenly formed in the length direction of the limiting structure, and the positioning pin is inserted into any positioning groove, so that pre-positioning of the height of the grip is achieved, the height adjusting difficulty is lowered, and adjusting is more convenient; in addition, one-way self-locking is formed between the positioning pin and the positioning groove, so that the situation that the adjusted height slides down due to dragging force is avoided, and the height stability is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of trolleys, and particularly relates to a flat trolley with a telescopic handle. Background Art

[0002] Flat trolleys are essential tools during the process of goods transportation. However, the height of the handle of the current flat trolleys is fixed and cannot be changed according to the different heights of users, which brings a lot of inconvenience to users. Content of the Utility Model

[0003] The purpose of the utility model is to provide a flat trolley with a telescopic handle, which realizes the adjustable height of the handle, thus making the flat trolley more convenient to use.

[0004] To achieve the above purpose, the utility model provides a flat trolley with a telescopic handle, which comprises a vehicle body and a handle fixed on one side of the vehicle body. The handle includes an elastic rod and a grip fixed on the top of the elastic rod; the elastic rod includes a fixed cylinder installed on the vehicle body and a telescopic rod slidably installed in the fixed cylinder and its upper end can extend out of the fixed cylinder; a limiting structure is arranged between the fixed cylinder and the telescopic rod; the limiting structure includes a positioning pin slidably installed on the side wall of the fixed cylinder and positioning grooves opened on the side wall of the telescopic rod and evenly arranged along its length direction; the inner end of the positioning pin can extend into the inner cavity of the fixed cylinder and can be inserted into any positioning groove; its outer end extends out of the fixed cylinder; the inner end of the positioning pin extends into the inner cavity of the fixed cylinder under the elastic acting force between the positioning pin and the fixed cylinder; a one-way self-locking is formed between the positioning pin and the positioning groove; a grip is fixed on the top of the telescopic rod.

[0005] After adopting the above structure, by setting the elastic rod, the height of the grip can be adjusted according to the height of the user, thus making the flat trolley more convenient to use; by setting the limiting structure, the limiting structure includes positioning grooves evenly arranged along its length direction, and the positioning pin is inserted into any positioning groove, realizing the pre-positioning of the grip height, reducing the difficulty of height adjustment and making the adjustment more convenient; in addition, by forming a one-way self-locking between the positioning pin and the positioning groove, the adjusted height can be prevented from sliding down due to pulling force, thus ensuring the stability of the height.

[0006] In order to enable the positioning pin to slide stably on the fixed cylinder, a fixed block is fixed on the side wall of the fixed cylinder, a slideway is opened on the fixed block, and the positioning pin is slidably installed in the slideway; the slideway communicates with the inner cavity of the fixed cylinder.

[0007] In order to reduce the friction between the positioning pin and the slideway and ensure that the positioning pin can slide into the positioning groove under the action of gravity, the slideway is in the shape of a kidney-shaped hole and is arranged obliquely upward, and the positioning pin is in a cylindrical structure and is rotatably installed in the slideway.

[0008] To increase the elastic force of the positioning pin and ensure its smooth rolling into the positioning groove, a return spring is provided between the slideway and the positioning pin.

[0009] To achieve the one-way self-locking of the temperature between the positioning pin and the positioning groove, the positioning groove is a ratchet groove. After the inner end of the positioning pin is inserted into the ratchet groove, the positioning pin abuts against the top of the ratchet groove and forms a rigid support.

[0010] To improve the stability of the grip support force, a set of elastic rods are respectively provided on both sides of the grip.

[0011] To achieve the consistency of height adjustment on both sides of the grip and increase the gravity of the positioning pin to ensure its more stable sliding, the positioning pins on the two fixed cylinders are connected to each other.

[0012] To achieve the self-locking after the height adjustment of the grip, a threaded hole is provided on the fixed block. The threaded hole communicates with the outside and the slideway, and a locking bolt is screwed into the threaded hole. The inner end of the locking bolt abuts against the positioning pin.

[0013] After adopting the above technical solutions, the beneficial effects of the present utility model are as follows:

[0014] The flat trolley with a telescopic handle of the present utility model solves the technical problem that the handle height of the flat trolley in the prior art is not adjustable, resulting in inconvenience for users. By providing elastic rods, the present utility model realizes that the grip can be adjusted in height according to the height of the user, making the flat trolley more convenient to use; by providing a limiting structure, the limiting structure includes positioning grooves uniformly arranged along its length direction, and the positioning pin is inserted into any positioning groove, realizing the preliminary positioning of the grip height and reducing the difficulty of height adjustment, making the adjustment more convenient; in addition, by forming a one-way self-locking between the positioning pin and the positioning groove, the adjusted height is prevented from sliding down due to pulling force, thus ensuring the stability of the height. Description of the Drawings

[0015] Figure 1 is a schematic structural diagram of a flat trolley with a telescopic handle of the present utility model;

[0016] Figure 2 is Figure 1 the structural diagram of the handle in

[0017] Figure 3 is Figure 2 the partial enlarged view of A in

[0018] Figure 4 is Figure 1 the partial enlarged view of B in

[0019] In the figure, 1 is the vehicle body, 2 is the handle, 21 is the fixed cylinder, 210 is the fixed block, 211 is the positioning pin, 212 is the slideway, 213 is the return spring, 214 is the locking bolt, 215 is the connecting rod, 22 is the telescopic rod, 221 is the positioning groove, and 23 is the grip. Detailed implementation mode

[0020] The present utility model will be further described below in conjunction with the accompanying drawings.

[0021] The orientations involved in this specification are based on the orientation of a flat trolley with a telescopic handle in normal operation of the present utility model, without limiting its orientation during storage and transportation, only representing relative positional relationships and not absolute positional relationships.

[0022] As Figure 1 shown, a flat trolley with a telescopic handle includes a vehicle body 1 and a handle 2 fixed to one side of the vehicle body 1. The handle 2 includes an elastic rod and a grip 23 fixed to the top of the elastic rod.

[0023] The elastic rod includes a fixed cylinder 21 installed on the vehicle body 1 and a telescopic rod 22 slidably installed in the fixed cylinder 21 and having its upper end extendable out of the fixed cylinder 21; a limiting structure is provided between the fixed cylinder 21 and the telescopic rod 22.

[0024] As Figure 2 , Figure 3 and Figure 4 collectively shown, the limiting structure includes a positioning pin 211 slidably installed on the side wall of the fixed cylinder 21 and positioning grooves 221 opened on the side wall of the telescopic rod 22 and uniformly arranged along its length direction; the inner end of the positioning pin 211 can extend into the inner cavity of the fixed cylinder 21 and can be inserted into any one of the positioning grooves 221; its outer end extends out of the fixed cylinder 21; an elastic acting force between the positioning pin 211 and the fixed cylinder 21 causes the inner end of the positioning pin 211 to extend into the inner cavity of the fixed cylinder 21.

[0025] A fixed block 210 is fixed on the side wall of the fixed cylinder 21. A slideway 212 is opened on the fixed block 210. The positioning pin 211 is slidably installed in the slideway 212; the slideway 212 communicates with the inner cavity of the fixed cylinder 21, thereby ensuring that the inner end of the positioning pin 211 extends into the inner cavity of the fixed cylinder 21.

[0026] In this embodiment, a slideway 212 is arranged on the fixed block 210 in an inclined upward direction. The slideway 212 is a waist-shaped hole structure. A positioning pin 211 is slidably installed in the slideway 212. The positioning pin 211 is a cylindrical structure and is rolled and installed in the slideway 212. Because the slideway 212 is arranged in an inclined upward direction, under the action of its gravity (the elastic force mentioned above), the positioning pin 211 will roll downward and get stuck on the outer wall of the telescopic rod 22. When any positioning groove 221 is connected to the slideway 212, the positioning pin 211 will roll into the positioning groove 221, thereby realizing the position positioning of the fixed cylinder 21 and the telescopic rod 22.

[0027] In practical applications, the positioning pin 211 can also adopt an elastic pin structure, and a return spring 213 is clamped between the slide 212 and the positioning pin 211. At this time, the spring force of the return spring 213 acts as an elastic force to insert the inner end of the positioning pin 211 into any positioning groove 221.

[0028] In this embodiment, in order to strengthen the force of the positioning pin 211, a return spring 213 is also provided between the slideway 212 and the positioning pin 211. The dual force of the return spring 213 and the positioning pin 211 ensures that the positioning pin 211 is elastically inserted into the positioning groove 221.

[0029] One-way self-locking is formed between the inner end of the positioning pin 211 and the positioning groove 221. The one-way self-locking can realize that the telescopic rod 22 slides upwards but cannot slide downwards.

[0030] In order to achieve this function, the positioning groove 221 in the present embodiment is a ratchet groove, that is, the cross-section of the positioning groove 221 is a right-angled triangle structure, and its top and the slot position are right-angled surfaces; when the positioning pin 211 rolls into the positioning groove 221 from the slot, the top of the positioning pin 211 is stuck on the right-angled surface at the top of the positioning groove 221, and the positioning pin 211 rests on the slot top of the ratchet groove and forms a rigid support, thereby achieving self-locking; and when the telescopic rod 22 moves upward, the bottom inclined surface of the positioning groove 221 interacts with the positioning pin 211, forcing the positioning pin 211 to withdraw from the positioning groove 221; when the positioning groove 221 at the bottom of the telescopic rod 22 is aligned with the slide 212, the positioning pin 211 re-enters the positioning groove 221, thereby achieving the upward sliding of the telescopic rod 22. Of course, other structures can also be used for one-way self-locking. For example, a wedge block is set at one end of the positioning pin 211 inserted into the positioning groove 221, and one-way self-locking is achieved through the guiding effect of the wedge block. This embodiment does not limit this.

[0031] When the one-way self-locking is released, the positioning pin 211 is pulled out of one end of the slideway 212 to make the positioning pin 211 escape from the positioning groove 221 , thereby achieving self-locking contact.

[0032] The top of the telescopic rod 22 is fixed with a grip 23; in order to ensure the support stability of the grip 23, a set of elastic rods are respectively arranged on both sides of the grip 23.

[0033] In order to realize the one-way self-locking on both the left and right sides simultaneously, the positioning pins 211 on the two fixed cylinders 21 are connected to each other. That is, the central axis positions of the two positioning pins 211 are fixedly connected through a connecting rod 215. The connecting rod 215 ensures the synchronism of the two positioning pins 211 and increases the gravity of the positioning pins 211, so as to ensure that they smoothly roll into the positioning groove 221.

[0034] In this embodiment, a locking structure can be selectively added. When the height of the grip 23 is adjusted, in order to realize position locking, a threaded hole is opened on the fixed block 210. The threaded hole communicates with the outside and the slideway 212. A locking bolt 214 is screwed into the threaded hole. The inner end of the locking bolt 214 abuts against the positioning pin 211, pressing the positioning pin 211 in the positioning groove 221, and realizing the locking of the height of the grip 23.

[0035] As Figure 1 、 Figure 2 、 Figure 3 and Figure 4 collectively shown, the adjustment process of a flat trolley with a telescopic handle according to the present invention is as follows:

[0036] The height of the handle 2 is increased:

[0037] Loosen the locking bolt 214 to avoid interfering with the movement of the positioning pin 211; lift the grip 23 upward. When the telescopic rod 22 moves upward, the bottom slope of the positioning groove 221 and the positioning pin 211 interact with each other, forcing the positioning pin 211 to withdraw from the positioning groove 221; the telescopic rod 22 moves upward. When the next positioning groove 221 is aligned with the slideway 212, the positioning pin 211 re-enters the positioning groove 221, realizing the upward sliding of the telescopic rod 22.

[0038] The height of the handle 2 is decreased. Lift the connecting rod 215 with one hand. The connecting rod 215 drives the positioning pins 211 on both sides to withdraw from the positioning groove 221. Under the action of gravity or pressure, the telescopic rod 22 moves downward; when the height is adjusted, release the connecting rod 215, and the positioning pin 211 re-enters the corresponding positioning groove 221, realizing the downward movement of the telescopic rod 22.

[0039] Certainly, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by those skilled in the art within the scope of the essence of the present invention should also fall within the protection scope of the present invention.

Claims

1. A flat trolley with a telescopic handle, comprising a vehicle body and a handle fixed to one side of the vehicle body, characterized in that: The handle includes an elastic rod and a grip fixed to the top of the elastic rod; The elastic rod includes a fixed cylinder mounted on the vehicle body and a telescopic rod slidably mounted in the fixed cylinder and having its upper end extendable out of the fixed cylinder; a limiting structure is provided between the fixed cylinder and the telescopic rod; The limiting structure includes a positioning pin slidably mounted on the side wall of the fixed cylinder and positioning grooves formed on the side wall of the telescopic rod and uniformly arranged along its length direction; the inner end of the positioning pin can extend into the inner cavity of the fixed cylinder and can be inserted into any one of the positioning grooves; its outer end extends out of the fixed cylinder; the inner end of the positioning pin extends into the inner cavity of the fixed cylinder by an elastic force between the positioning pin and the fixed cylinder; a one-way self-locking is formed between the positioning pin and the positioning groove; A grip is fixed to the top of the telescopic rod.

2. The flat trolley with a retractable handle according to claim 1, characterized in that: A fixed block is fixed on the side wall of the fixed cylinder, a slideway is formed on the fixed block, and the positioning pin is slidably mounted in the slideway; the slideway communicates with the inner cavity of the fixed cylinder.

3. The flat trolley with a retractable handle according to claim 2, wherein: The slideway is in a kidney-shaped hole structure and is inclined upward, and the positioning pin is in a cylindrical structure and is rollably mounted in the slideway.

4. The flat trolley with a retractable handle according to claim 3, wherein: A return spring is provided between the slideway and the positioning pin.

5. The flat trolley with a retractable handle according to claim 3, wherein: The positioning groove is a ratchet groove, and when the inner end of the positioning pin is inserted into the ratchet groove, the positioning pin abuts against the top of the ratchet groove and forms a rigid support.

6. The flat trolley with a retractable handle according to claim 4, wherein: A set of the elastic rods is respectively arranged on both sides of the grip.

7. The flat trolley with a retractable handle according to claim 6, characterized in that: The positioning pins on the two fixed cylinders are connected to each other.

8. A flat trolley with a retractable handle according to claim 2, characterized in that: A threaded hole is formed on the fixed block, the threaded hole communicates with the outside and the slideway, and a locking bolt is screwed in the threaded hole, and the inner end of the locking bolt abuts against the positioning pin.

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