DE102022004628A1 - Retractable leash with automatic freewheel - Google Patents

Abstract

The invention relates to a retractable leash device, preferably for dogs, which is provided with a roller (2) located in a housing (1), on which the leash (5) unwinds against a spring (6) and winds up again with the help of the spring (6). Conventional retractable leashes are provided with a brake button (14) which, when activated, prevents the leash (5) from unwinding any further, but also prevents it from winding up. The difference to conventional retractable leashes is that winding up remains possible even when the brake button (14) is pressed. This is possible by installing a freewheel (3) between the roller (7) and the brake disk (4). Due to the invention, the leash can no longer sag or become tangled when the brake button is pressed.

Description

The invention relates to a device according to the preamble of claim 1. Retractable leashes are preferably used for leading animals. The invention relates to a freewheel in which a leash is unwound and rewound from a roller mounted in a housing against the force of a spring, the freewheel being arranged in such a way that when the brake button is pressed it only rotates freely when the leash is wound up, so that a tight leash is always guaranteed and the leash can no longer sag. In the unwinding direction the freewheel is blocked and the brake button engages, unwinding is not possible.

State of the art:

Most retractable leashes, e.g. DE000007818193U1 or DE000008410345U1 , are only equipped with a return spring and a brake button, whereby the disadvantage is that when the brake button is pressed while the leash is partially or completely unwound and the dog, for example, is running quickly towards the handler, the leash can slacken a lot if the brake button is not released quickly enough.

This is very dangerous because the dog can become tangled in its own leash and quickly lose control, which can result in the dog being injured or accidents occurring.

Task:

The aim of the invention is to create a safe retractable leash that prevents the leash from slackening and causing the dog, for example, to become tangled and lose control.

This object is achieved by the use of claim 1.

The main advantage of the invention is that the leash always remains tight.

With dogs, for example, there are often encounters in which the dog quickly runs back in the direction of the leash handler. In this case, despite the brake being applied, it is guaranteed that the leash can wind up and thus remain taut by using a freewheel, and the dog, for example, remains under control.

Another advantage is that it is easier to bring the dog back to you more quickly and easily.

With a conventional retractable leash, the dog is pulled towards the leash handler by pressing the lock button and pulling at the same time, about an arm's length, then the leash handler must quickly release the lock button to bring his arm back towards the dog so that he can then press the lock button again to pull the dog towards him by an arm's length.

This process is repeated until the dog reaches the leash handler and the leash is completely rolled up. During this process, there is a great risk that the leash handler will lose control, especially if he is in a stressful situation.

With the invention, this danger no longer exists, as the leash handler only has to activate the locking button once and can then pull the dog safely towards him by continuously pulling and stretching his arm.

• 1 eine Vorderansicht der Rollleine in Schnittdarstellung mit Klemmrollenfreilauf
• 2 eine Seitenansicht der Rollleine in Schnittdarstellung
• 3 eine vergrößerte Ansicht des Klemmrollenfreilaufs
• 4 einen stark vergrößerten Ausschnitt des Klemmrollenfreilaufs, Ansicht A zeigt ihn rechts frei drehend, Ansicht B zeigt ihn beim Versuch links zu drehen, verklemmt.

The following examples are explained in more detail using the drawings. They show:

• 1 a front view of the retractable line in section with clamp roller freewheel
• 2 a side view of the retractable line in section
• 3 an enlarged view of the roller freewheel
• 4 a greatly enlarged section of the clamping roller freewheel, view A shows it rotating freely to the right, view B shows it jammed when trying to turn to the left.

1 shows a sectional view, the bearing pin 7 is firmly connected to the housing 1. The freewheel 3 rotates on the bearing pin 7, freely rotating in the winding direction and locked in the unwinding direction, rotation is not possible. The line roller 2 is mounted so it can rotate about a shaft 7. The line roller 2 is firmly connected to the bearing pin 7. The outer ring of the freewheel 3 is firmly connected to the brake disk 4. Furthermore, the locking button 14 can be seen, which is guided in the housing 1. If it is pressed, it locks the locking disk 4 and unwinding is no longer possible, but due to the invention, winding is still possible. If the locking button 14 is released, it is pressed back into its starting position by the spring 13, and the line 5 can then be rolled up and unrolled again. The handle area 15 can also be seen, with which the retractable line is held.

2 also shows a sectional view. As can be seen from the figure, the line roller 2 is arranged freely rotatable on the shaft 10. The Shaft 10 is connected to the inner end of spring 6, the outer end of spring 6 is connected to the line reel 2, this enables automatic winding of line 5. Cover 9 is provided for optimal storage of line reel 2. Bearing 8 also serves as a storage facility, in this case for brake disk 4. Brake disk 4 is connected to freewheel 3 in a rotationally fixed manner. Inside freewheel 3 is bearing pin 7, which is firmly connected to line reel 2. Freewheel 3 is also the storage facility for bearing pin 7. Position 12 shows the locking lever, which can be pushed into holes 16 by pressing in order to hold line 5 at a fixed length, meaning line reel 2 can no longer rotate. After locking lever 12 is released, spring 17 pushes the lever back to its original position and line reel 2 can rotate freely again.

3 shows the clamping roller freewheel in a highly magnified view. The rollers 18 roll normally in the bearing ring 20 as long as the clamping ring 19 turns clockwise; rotation is possible. However, if the clamping ring 19 turns clockwise, the rollers 18 run into a narrow space so that they jam and rotation is no longer possible.

4 shows a section of the clamping roller freewheel. In illustration A you can see how the rollers 18 move into the left part of the clamping ring 19 when the clamping ring turns clockwise. The rollers 18 can roll freely. In this state, the clamping roller freewheel works like a freely running needle bearing, and the line 5 can be rolled up. In illustration B you can see that the rollers 18 move into the right area of the clamping ring 19 when the clamping ring 19 turns to the left. Due to the reduction in the space between the bearing ring 20 and the clamping ring 19, the rollers 18 can no longer roll and the clamping roller freewheel jams. The clamping roller freewheel cannot rotate, and therefore the line 5 cannot roll up either.

List of reference symbols:

1

Housing

2

Linen roll

3

Freewheel

4

Locking disc

5

rope

6

Retractor spring

7

Wave

8th

storage

9

Lid

10

axis

11

Screws

12

Locking lever

13

Feather

14

Lock button

15

Handle

16

Drilling

17

Feather

18

roll

19

Clamp ring

20

Bearing ring

QUOTES INCLUDED IN THE DESCRIPTION

This list of documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions.

Cited patent literature

• DE 000007818193 U1 [0002]
• DE 000008410345 U1 [0002]

Claims (5)

Retractable leash for a retractable and retractable leash for leading animals, with a leash reel (2) which is rotatably mounted in a housing (1), from which the leash (5) can be unwound against the force of a spring (6) and is rewound by the spring force, characterized in that the locking disk (4) is provided with a freewheel (3), this runs on the shaft (7) which is connected in a rotationally fixed manner to the leash reel (2), wherein the freewheel rotates freely in the winding direction and locks in the unwinding direction, so that it is ensured that when the locking button (14) is actuated, the leash is locked in the unwinding direction and can wind up freely in the winding direction. Retractable leash Claim 1 , in which the brake disc [4] in the housing [1] is provided with a bearing [8] Retractable leash Claim 1 - 2 , in which a locking lever [13] is located on the housing [1], which blocks the disc [2] for the purpose of inspection, cleaning, or to set and maintain a fixed length of the line [5]. Retractable leash Claim 1 - 3 , where the locking lever [13] functions as a safety button, the locking lever [13] functions in the opposite way to the Patent claim 1 , the line [5] can only unwind if the lock button [13] is pressed, if the lock button [13] is released, the unwinding of the line [5] is prevented by blocking the brake disc [4], the line [5] can only be rolled up, which ensures greater safety for less experienced line handlers. Retractable leash Claim 1 - 4 , in which a pawl freewheel, sprag freewheel, clamp ring freewheel, loop spring freewheel or a toothed disc freewheel is installed instead of the clamp roller freewheel. In principle, however, all types of freewheels are possible, as long as it is guaranteed that they can rotate freely in one direction and are locked in the other direction.

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