ES1221516U - Trolley with lockable frame. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Trolley with lockable frame, of the type comprising a base (1) with wheels (2) and a frame (3) formed by at least one telescopic rod (4, 4'), formed by a lower bar (4) topped in a handle (5) and coupled in a larger bar (4') and with a bridge (6) in the main bar (4') next to the minor bar (4), the bridge having two openings (62) for the step of each telescopic bar (4, 4') characterized in that: the bridge (6) comprises at least one hole (61) for passing a latch (7), which intersects an opening (62), and which allows the contact of the latch (7) with the minor rod (4); the latch (7) comprises a head (71) and a shank (72) with a notch (73), with a first position in which the shank (72) is located within the opening (62) and a second position in wherein the notch (73) is aligned with the opening (62); and the smaller bar (4) has at least one groove of dimensions commensurate with the part of the rod (72) located within the opening (62), and alignable with the bore (61). (Machine-translation by Google Translate, not legally binding)

Description

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Trolley with lockable frame.

TECHNICAL SECTOR

The present invention relates to a carriage for carrying backpacks or other elements, which incorporates a lockable frame.

It is applicable in the field of the manufacture of travel, school and transport elements.

STATE OF THE TECHNIQUE

It is known in the state of the art the utility model ES1068123U which discloses a carriage with an extendable frame attached to a base by an articulation (in this case, two joints, one for each bar of the frame), and which has two elements of lock to prevent the rotation of the joint and the folding of the car.

This type of car is common in the art and offers an effective solution for carrying backpacks. However, the natural way of use is pulling the car, with the arm behind the body. Such postures can cause injuries and problems when the load is too high.

If it is desired to place the load in front, as recommended to avoid injuries, the effort transmitted along the frame can cause the telescopic bar lock to be skipped, picking up the frame and preventing the advance.

It is therefore desirable to have a car with a more reliable frame, which can be pushed into the safest position for the user.

BRIEF EXPLANATION OF THE INVENTION

The invention consists of a carriage with a lockable frame according to the claims. This car solves, in its different embodiments, the problems detected in the state of the art.

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The trolley with lockable frame of the invention is of the type comprising a base with wheels and a frame formed by at least one telescopic bar. The telescopic bar, in turn is formed by a smaller bar topped on a handle and internally coupled to a larger bar. This major bar has a bridge near the end where the minor bar is attached. The bridge, meanwhile, has two openings for the passage of each telescopic bar.

In addition to these characteristics, the bridge comprises at least one drill hole of an insurance that intersects with an opening. This drill is aligned with an eye on the major bar that allows the insurance contact with the minor bar. If the bridge is located next to the main bar, that eye is not necessary, since the insurance can directly access the lower bar.

The insurance comprises a head and a rod with a notch. The lock, inside the drill has a first position in which part of the rod, or active part, is located inside the opening and a second position in which the notch is aligned with the eye of the main bar and the opening of the bridge , so that the insurance does not interfere with the movement of the minor bar.

In order to be able to relate to the insurance, the minor bar has at least one groove of dimensions in accordance with the rod part located within the opening, and aligned with the rod and the hole. A stable frame position will be generated for each slot that is aligned with the bridge drill.

It is preferred that the car has a set of insurance for each telescopic bar.

To facilitate the introduction of the rod into the groove without the minor bar losing strength, it is preferred that the rod has a narrowing adjacent to the notch. This narrowing corresponds to the active part of the rod, which remains inside the opening in the first position of the insurance.

The lock may comprise a spring return to the first position.

The relative position between the notch and the part of the rod that remains within the opening will define the type of movement necessary to move from the first position, or

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lock position, and the second position. It is preferred that the notch is between the head and the active part of the rod, which enters into the opening, to simplify the operation.

Other embodiments will be described later.

DESCRIPTION OF THE DRAWINGS

For a better understanding of the invention, the following figures are included.

Figure 1: Side view of a schematic base example in folded position (Fig. 1B) and folded (Fig. 1A).

Figure 2: Perspective view of an example of insurance.

Figure 3: Front view (Fig. 3A) and rear view (Fig. 3B) of an example of a bridge with the lock of figure 2.

Figure 4: View of the inside of the opening of the bridge with the lock of figures 2 and 3 in its two positions: lock (Fig. 4A) and release (Fig. 4B).

EMBODIMENTS OF THE INVENTION

Next, a mode of realization of the invention is briefly described, as an illustrative and non-limiting example of this, based on the figures provided.

The invention is provided for a car as shown in the example of Figures 1A and 1B. It comprises a base (1) for supporting a backpack, with wheels (2) and a telescopic frame (3).

The frame (3) has a folded position (figure 1B) and at least one unfolded position (Fig. 1A). For this, the frame (3) is formed by a series of telescopic bars (4.4 ’) that are joined by the upper part in a handle (5), and by the middle part in a bridge (6). In the stowed position, the handle (5) is at the height of the bridge (6), and preferably partially hidden therein.

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Between the base (1) and the bridge (6) there are some larger bars (4 ’), where the smaller bars (4) are coupled, which are those that move to lengthen the frame. As is known in the art, the smaller bars (4) have marks, formed by incisions or holes that mark the stable positions of the frame. When they only have one brand, there is only one position displayed. If several are created, there are several stable positions. On the other hand, the smaller bars (4) have stops that prevent the complete exit of the interior of the larger bars (4 ’).

The preferred embodiment of the invention is shown in Figures 2 to 5. It can be seen how the stable position of the minor bars (4) is generated from a lock (7) on the bridge (6). Generally, insurance (7) will be provided for each set of bars (4, 4 ’), arranged in two holes (61) of the bridge (6).

An embodiment of the insurance (7) is shown in detail in Figure 2. It comprises a head (71), where it can be operated, and a rod (72) with a notch (73) on one side. The figure shows how notch (72) is bordered by a narrowing (74) of interlocking, which corresponds to a section of the rod (72) of smaller width, and arranged at the edge of the notch (73) farther from the head (71). This narrowing (74) corresponds to the active part of the rod (72). It is equally possible, although this alternative has not been represented, that the narrowing (74) is close to the head (71).

For its part, the bridge (6) has the borehole (61) near the opening (62) of the telescopic bars (4.4 ’), so that the lock (7) can influence them. For this, in a first position the narrowing (74) is located inside the opening (62) (figure 4A) and in a second position, the narrowing (74) leaves the opening (62) and the insurance assembly (7 ) is out of this (figure 4B). For this, the notch (73) will be of dimensions according to the opening (62) so as not to obstruct the passage of the minor bar (4) (Figure 4).

The position of the major bar (4 ’) must allow the safety (7) to come into contact with the minor bar (4). Therefore, it will be under the bridge (6) or have an eye that allows access. Finally, the smaller bar (4) will have at least one groove (not shown) of size corresponding to the narrowing (73), so that the narrowing (73) can enter the groove with little play. Preferably

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It will have a groove for the deployed position and a groove for the folded position.

If the rod (72) has the narrowing (74), and the groove is in accordance with each other, they define all the possible positions of the insurance (7), which cannot be removed from the drill (61) since the rest of the rod (72 ) cannot pass through the slot.

This mechanism is especially solid because the effort to remove the insurance (7) is completely transverse to the effort transmitted by the frame (3), so that an accidental release is not possible. Therefore, it is possible to push along the frame (3), such as when the carriage is placed in front of the user.

To use this car, the user will start from a stowed position (usually not locked by the safety lock (7)) and pull the handle (5) to separate it from the bridge (6), deploying the telescopic bar (4.4 ’). When the desired position is reached, which may be indicated in the minor bar (4), it acts on the locks (7), which are introduced into the slots of the respective minor bars (4). At that time, the frame (3) is perfectly secured and the carriage can be pushed.

To collect it, the head (71) of the insurance (7) is actuated and the frame (3) can be retracted to reduce its dimensions.

The latch (7) may comprise a spring that makes it tend to the first position, or position for locking the telescopic bars (4.4 ’).

The combination of material and shape of the insurance (7) should be strong enough to transmit the forces between both parts of the telescopic rod (4.4 ’), such as polypropylene or resin.

Claims (5)

5 10 fifteen twenty 25 30 1. Carriage with lockable frame, of the type comprising a base (1) with wheels (2) and a frame (3) formed by at least one telescopic bar (4.4 '), formed by a minor bar (4) finished off in a handle (5) and coupled in a major bar (4 ') and with a bridge (6) in the major bar (4') near the minor bar (4), the bridge having openings (62) for the step of each telescopic rod (4.4 ') characterized by: the bridge (6) comprises at least one hole (61) of passage of an insurance (7), which intersects with an opening (62), and which allows the contact of the insurance (7) with the minor bar (4); the lock (7) comprises a head (71) and a rod (72) with a notch (73), with a first position in which the rod (72) is located inside the opening (62) and a second position in that the notch (73) is aligned with the opening (62); Y The minor bar (4) has at least one groove of dimensions in accordance with the rod part (72) that can be placed inside the opening (62) and can be aligned with the hole (61). 2. Car, according to claim 1, whose rod (72) has a narrowing (74) adjacent to the notch (73) and which is inside the opening (62) in the first position of the insurance (7). 3. Car, according to claim 1, whose insurance (7) comprises a spring return to the first position. 4. Car, according to claim 1, whose notch (73) is between the head (71) and the rod part (72) located within the opening (62). 5. Car, according to claim 1, which has an insurance (7) for each telescopic bar (4.4 ’).