TWI640245B - Retractable leash - Google Patents

Abstract

A telescopic traction belt comprising an outer casing in which a rewinding mechanism composed of a reel and a return spring is provided, and a traction belt wound around the reel and pulled out from the outer casing, the traction belt being adjacent to the belt The tail position is provided with a stop, the outer casing is provided with a gate passage for the traction belt to enter and exit, the gate passage is defined by two gates, and the width is greater than the thickness of the traction belt and less than the thickness of the stop, the traction belt The maximum pull-out length is such that when the stop is blocked by the gate, the entire length of the traction belt is prevented from being pulled out of the outer casing to tear the rewind mechanism.

Description

Telescopic traction belt

The invention relates to a telescopic traction belt, in particular to a telescopic traction belt with a protection device.

Many pet owners' favorite hobby is to walk with their pets. For example, many dog and cat owners carry pets for outdoor walks on a daily or almost daily basis. Unfortunately, this can lead to unnecessary encounters. For example, a pet may attack other animals or people. In addition, pets may be distracted and run away or run into the streets, where they may be hit by people or hit by cars and injured or even die. Due to these dangers, many cities require pets to use traction belts outdoors.

The type of traction belt that is particularly popular with pet owners is the telescopic traction belt. The telescopic leash allows the pet owner to change the distance between the pet and the owner at any time. In particular, when a pet is safe, the pet can go further and further, and when the pet becomes more and more unsafe, keep the pet closer to the owner.

The conventional telescopic traction belt includes a casing in which a reel mechanism composed of a reel and a return spring (spring) and a leash which is wound around the reel and can be pulled out from the casing. When the leash is pulled out of the outer casing, the reel will rotate in the direction in which the leash is pulled out, while the spring is retracted to reserve the elastic energy. When the leash is released, the return spring releases the elastic energy to drive the reel to reverse rotation, retracting the leash back to the reel.

Since the return spring of the telescopic traction belt is connected to the reel, the traction belt is wound around the outer circumference of the reel, so when the full length of the traction belt is pulled out of the outer casing, the traction belt will The rewind mechanism is pulled directly, and as the speed at which the leash is pulled out is too fast, the force added to the rewind mechanism is excessive. In particular, when the telescopic traction belt is used for the purpose of weight reduction, cost reduction, etc., and a weak rewind mechanism is used, the rewind mechanism is easily torn when the leash is pulled out at a speed exceeding a critical speed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to provide a telescopic traction belt having a protection device which can prevent the entire length of the traction belt from being pulled out of the outer casing and prevent the rewinding mechanism from being torn.

The telescopic traction belt of the present invention comprises an outer casing having an upper casing wall, a lower casing wall and a side casing wall; a reel assembled in the casing and rotating around a central shaft disposed in the casing; a reversing spring assembled in the reel and connected to the reel and the central shaft respectively; and a traction belt wound around the outer circumference of the reel and capable of being pulled out from the outer casing, the traction belt having a belt Tail and take the lead. Wherein the traction belt is provided with a stop near the tail; the outer casing includes an opening disposed on the side casing wall, and a gate is respectively extended from the side casing walls on the rear sides of the opening, and the inside of the two gates Defining a gate passage between the side edges, the width of the gate passage being greater than the thickness of the traction belt and less than the thickness of the stop, the maximum length of the traction belt from the gate passage being pulled out of the outer casing is stopped at the stop When the two gates are stopped.

The outer casing further includes a door gear extending from the side wall of the front side of the opening to the same side of the gate, and a door passage is defined between the inner sides of the two door gears, and the inner side of the two door gears respectively Maintaining a gap with the inner side of the two gates; the doorway passage is formed directly in front of the gate passage, and the width of the doorway passage is greater than the thickness of the traction belt and less than the thickness of the stop; the gate is facing Traction The direction in which the belt is pulled out is curved into an arc shape, and the top edge and the bottom edge of the gate are respectively separated from the upper casing wall and the lower casing wall, so that only the outer side of the gate is connected to the side casing wall to have elasticity. .

The outer casing is formed by an upper casing and a lower casing, the upper casing including all of the upper casing wall and a portion of the side casing wall; the lower casing including all of the lower casing wall and the side Another portion of the casing wall, the central shaft being integrally formed with the lower casing wall.

The traction belt includes a ring member coupled to the lead for connecting a strap, the strap is coupled to the ring member by a hook coupled to a front end thereof, and the telescopic traction belt is received in a pocket The pouch is sewn to a walking strap worn on a pet or a collar that is placed over the pet's neck so that the pet owner can pull the leash restraint to control the pet through the strap.

The stop is formed by folding the tail of the traction belt toward the leading direction, and then folding back and stitching together with the belt of the traction belt. The stop may also be separately molded to the traction belt by a hard material.

The telescopic traction belt further includes a guide disposed in front of the opening and located in front of the door gear, the guide includes a tunnel and a guide suspended in the center of the tunnel; the traction belt from a side wall of the tunnel and The guide passes between.

The outer casing further includes a circular ring concentric with the central shaft and projecting from the upper surface of the lower casing wall; the drum has a wheel disc below the drum, and the wheel remains rotated in the ring.

The channel is trapezoidal and the width is decreasing from the outside to the inside; the guide is straight elliptical and remains suspended by a cantilever extending from the other side wall of the tunnel.

The outer surfaces of the two door gears are respectively provided with a latch, and the two sides of the guide seat each have a tongue and groove, and the guide seat is engaged with the latch by the tongue and groove to be positioned at the opening of the outer casing.

The effect of the present invention against the prior art is that it has a rewind mechanism protection device that can limit the maximum pull-out length of the leash, so that the leash can be pulled out of the outer casing at a speed exceeding a critical speed, and the rewind mechanism can be ensured to be safe and non-destructive.

The detailed description of the present invention and other objects and features of the present invention will be fully understood by reference to the accompanying claims

10‧‧‧Retractable leash

20‧‧‧ Shell

21a‧‧‧ Lower casing

21b‧‧‧Upper casing

22a‧‧‧ lower wall

22b‧‧‧Upper shell wall

23a, 23b‧‧‧ side shell wall

24‧‧‧ center axis

25‧‧‧ Ring

26, 26a, 26b‧‧‧ openings

27, 27a, 27b‧‧ ‧ gate

28, 28a, 28b‧‧ ‧ gate channel

29, 29a, 29b‧‧ ‧ door file

30‧‧‧ reel

31, 31a, 31b‧ ‧ gap

32,32a,32b‧‧‧Carmen

33‧‧‧Slots

34, 34a, 34b‧‧‧ door channel

35‧‧‧ center hole

36‧‧‧ Groove

37‧‧‧ Roulette

38‧‧‧ hook

40‧‧‧Return spring

41‧‧‧ hook

42‧‧‧Connecting Department

50‧‧‧ traction belt

51‧‧‧With circle

52‧‧‧ ring members

53‧‧ § stop

60‧‧ ‧ guide

61‧‧‧榫榫

62‧‧‧ Holes

63‧‧‧ Guides

64‧‧‧Cantilever

70‧‧‧Leave

71‧‧‧ hook

72‧‧‧ pocket

73‧‧‧ Walking belt

Fig. 1 is an external view of the telescopic traction belt of the present invention.

Fig. 2 is an exploded view of the components of the present invention.

Figure 3 is a plan view showing the upper casing of the present invention, showing the state in which the traction belt is wound around the reel.

Figure 4 is a schematic view showing the state of use of the present invention.

Fig. 5 is a plan view similar to Fig. 3, showing the state in which the maximum pulling length of the traction belt is stopped when the stop is blocked by the door.

As shown in the first to third figures, the telescopic traction belt 10 disclosed in the present invention comprises a casing 20, a reel 30, a reversing spring 40, a traction belt 50 and a guide 60. The outer casing 20 is formed by the lower casing 21a and the upper casing 21b, and defines a space for accommodating other components of the telescopic traction belt 10. In the embodiment of the drawings, the outer casing 20 is shaped like a large circle and a small circle. It is understood that such shapes are intended to be illustrative and illustrative, and are not intended to be limited to any particular shape, and other desirable shapes are intended to be included within the scope of the present invention. The lower casing 21a includes a lower casing wall 22a, and a side casing wall 23a extending vertically upward from the periphery of the lower casing wall 22a, and a fixed central shaft 24, and a central axis are disposed at the center of the lower casing wall 22a. The ring 25, concentrically protruding from the upper surface of the lower casing wall 22a, supports the rotation of the spool 30 and holds the center point of the spool 30 in the ring 25. The lower casing 21a further includes an opening 26a provided in the side casing wall 23a, and a side gate wall 23a extending from the rear sides of the opening 26a respectively extends a gate 27a toward the other side, and an inner side boundary of the two gates 27a defines a gate passage 28a. As the traction belt 50 pulls out and retracts the entrance and exit of the outer casing 20. The bottom edge of the shutter 27a is separated from the lower casing wall 22a, and the outer side of the shutter 27a is connected to the side casing wall 23a to provide elasticity, thereby mitigating the impact. The lower housing 21a further includes two door stops 29a extending from the side shell walls 23a on the front sides of the opening 26a to the shutters 27a on the same side, and a door passage 34a is defined between the inner sides of the two door stops 29a. Located directly in front of the gate passage 28a, the action is the same as that of the gate passage 28a, and the inner side of the second door 29a is respectively held with a gap 31a with the inner side of the second gate 27a to limit the maximum deformation amount of the shutter 27a, and the gate 27a is prevented. Excessive deformation and breakage. Further, the outer surfaces of the two door stops 29a are each provided with a latch 32a for assembly of the guide 60.

The shape of the upper casing 21b coincides with that of the lower casing 21a, and the upper and lower sides are opposed to each other to constitute the outer casing 20. The upper casing 21b is substantially identical in construction to the lower casing 21a, and includes an upper casing wall 22b, a side casing wall 23b, an opening 26b, a gate 27b, a gate passage 28b, a door stop 29b, a gap 31b, a cassette 32b, and The door passage passages 34b and, respectively, and the lower casing wall 22a, the side casing wall 23a, the opening 26a of the lower casing 21a, The shutter 27a, the shutter passage 28a, the door stop 29a, the gap 31a, the latch 32a, and the door passage 34a correspond to each other, and the difference is that the central shaft 24 and the ring 25 provided in the lower casing 21a are not in the upper casing 21b. Need it again. When the lower casing 21a and the upper casing 21a are vertically joined to form a closed casing 20, the openings 26a, 26b, the gates 27a, 27b, the gate passages 28a, 28b, the door stops 29a, 29b, the gaps 31a, 31b, the card The rafts 32a, 32b and the doorway passages 34a, 34b will form a complete opening 26, gate 27, gate passage 28, door stop 29, gap 31, cassette 32 and doorway passage 34.

The spool 30 is disposed in the outer casing 20 and rotates about a central axis 24 of the lower casing 20a. To facilitate rotation and winding, the spool 30 is cylindrical and includes a central bore 35 that rotates about the central axis 24 and a recess 36 that is concentric with the central bore 35 to receive the return spring 40. The spool 30 further includes a wheel 37 formed at the bottom, which is held in rotation in the ring 25 of the lower casing 21a. That is, in addition to the rotational movement of the spool 30, the central shaft 24 and the ring 25 can retain the center point of the spool 30 within the outer casing 20.

The return spring 40 is disposed in the recess 36 of the spool 30 as a power source for transmitting rotational motion to the spool 30. The return spring 40 is a spring that wraps the spring material of the sheet into a spiral shape, and this scroll spring is also called a spring. The return spring 40 has a hook portion 41 at the inner end and a connecting portion 42 at the outer end. The hook portion 41 is coupled to a slot 33 provided in the center shaft 24, and the connecting portion 42 is fixed to the outer circumference of the spool 30. When the leash 50 is pulled out of the outer casing 20, the retracting spring 40 is crimped as the reel 30 rotates, thereby accumulating elastic energy. When the force acting on the return spring 40 is released, the return spring 40 releases the elastic energy to drive the spool 30 to rotate in the reverse direction, and the traction belt 50 is wound back into the spool 30. The return spring 40 and the spool 30 constitute a rewind mechanism (not numbered) of the telescopic traction belt 10.

The leash 50 is wound around the outer circumference of the reel 40 and can be pulled out from the outer casing 20 up to the maximum length and connected to the collar or the shoulder of the neck or body of the pet to be constrained to control (Harness) The length can be adjusted by the user as needed to keep the pet close to the user's needs. For example, if the user wishes to allow the pet to be between 5 and 10 meters apart, the maximum length of the leash 50 can be 10 meters. The traction belt 50 is made of a material that can withstand the pulling of the user and the pet, such as nylon, metal, leather, and the like. The leash 50 has a tail and a leader at opposite ends, wherein the tail forms a band 51 which can be directly looped to a hook 38 disposed on the outer circumference of the reel 30. The leader of the leash 50 is coupled to a ring member 52, such as a circular ring or D-ring, for attaching a strap 70. As shown in FIG. 4, the strap 70 is coupled to the ring member 52 by a Snap Hook 71 coupled to the front end thereof, and the pet owner holds the strap 70 to pull the traction belt 50 to control the pet. effect. As for the telescopic traction belt 10, it is housed in a pouch 72 that is sewn to a walking belt 73 worn on the pet or a collar that is placed over the pet's neck. That is to say, the telescopic traction belt 10 will be carried by the pet. This design is directly held by the pet owner in comparison with the conventional telescopic traction belt, which can reduce the load of the pet owner, and the pet also achieves the effect of load training. Of course, the strap 70 can also be attached to a fixed object (not shown), such as a trunk, a column, etc., so that the pet has a radius of the effective length of the traction belt 50 centered on the fixed object without the owner's companionship. Free activities within the scope of the. The traction belt 50 further includes a stop 53 that cooperates with the gate passage 28 to limit the maximum pull-out length of the traction belt 50. That is, the entire length of the traction belt 50 can be prevented from being pulled out of the outer casing 20. The stop 53 is disposed near the end of the belt of the traction belt 50, and is produced by folding the tail of the traction belt 50 toward the leading direction by a length of about 10 to 15 mm. After being folded back, it is stitched together with the belt body of the traction belt 50. The stop 53 can also be a hard material such as plastic or metal that is individually formed and secured to the traction belt 50. The widths of the gate passages 28 and the door passages 34 are both greater than the thickness of the traction belt 50 and less than the thickness of the stop 53. The maximum length of the traction belt 50 pulled out of the outer casing 20 from the gate passage 28 and the door passage 34 stops at the stop. When designed to be blocked by the gate 27, this design prevents the entire length of the traction belt 50 from being pulled out of the outer casing 20, preventing the rewinding mechanism from being torn.

The guide 60 is assembled to the opening 26 of the outer casing 20 and is located forward of the door stop 29 to assist the traction belt 50 to smoothly rewind the reel 30. The guide 60 is adapted to the shape of the opening 26, and each of the two sides has a tongue and groove 61. The two grooves 61 are respectively engageable with the latch 32 disposed on the outer surface of the second door 29, so that the guide 60 is Positioned in the opening 26 of the outer casing 20. The guide 60 further includes a passage 62 and a guide 63 at the center of the passage 62. The passage 62 has a trapezoidal cross section and a width which decreases from the outside to the inside. The guide 63 has a straight elliptical shape and passes through one of the passages 62. A cantilever 64 extending from the side wall is suspended in the center of the tunnel 62 to provide a rounded surface. The function of the guide 60 is that when the traction belt 50 is pulled out and is twisted due to the use process, the guide 63 having the rounded surface can be engaged with the other inwardly inclined side wall of the tunnel 62, which will pass between the two. The traction belt 50 is guided so that the traction belt 50 can be smoothly wound around the reel 30.

As shown in Figures 4 and 5, the pet carries the telescopic leash 10 through the walking strap 73 (or the collar that is placed over the neck) worn by the pet, and the pet owner holds the strap attached to the leash 50 by hand. At 70 o'clock, as the pet walks or ran away from the distance, the traction belt 50 will be pulled out of the outer casing 20 from the gate passage 28 and the door passage 34, at which time the reel 30 is rotated in the direction in which the traction belt 50 is pulled out. At the same time, the return spring 40 is crimped to reserve elastic energy. When the leash 50 is continued to pull out until the stop 53 When the gate 27 is stopped, the maximum length of the traction belt 50 is allowed to be pulled out of the outer casing 20. Since the shutter 27 has elasticity, when the traction belt 50 is pulled out to the maximum length at a relatively high speed, the shutter 27 will be bent by the impact of the stopper 53 and deformed in the direction of the door stop 29 until stopped by the door stop 29. When the gate 27 achieves the mitigating impact, most of the external force can be transmitted to the door stop 29, so that the top and bottom edges are still connected to the upper casing wall 22b and the lower casing wall 22a, respectively, and have sufficient strength. 29 withstand the impact.

Since the stop 53 can prevent the entire length of the traction belt 50 from being pulled out of the outer casing 20, and the stop 53 is still a certain length from the belt loop 51 of the connecting reel 53, when the traction belt 50 is pulled out of the maximum length, the reel The 30 and the return spring 40 do not need to be subjected to any external force, so that the rewind mechanism can be prevented from being torn. That is, even if the traction belt 50 is pulled out of the outer casing 20 at a speed exceeding the critical speed, the rewind mechanism can be secured.

When the traction belt 50 is released, that is, when the pet approaches the owner, the return spring 40 is stretched to release the elastic energy, thereby driving the reel 30 to rotate in the opposite direction, and under the action of the guide 60, the traction belt 50 smoothly rewinds the reel 30.

The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformation using the specification and the drawings of the present invention may be directly or indirectly applied to Other related technical fields are equally included in the scope of patent protection of the present invention.

Claims (10)

A telescopic traction belt comprising: an outer casing having an upper casing wall, a lower casing wall and a side casing wall; a reel assembled in the casing and rotating around a central shaft disposed in the casing; a spring assembled in the reel and connected to the reel and the central shaft, respectively; and a traction belt wound around the outer circumference of the reel and capable of being pulled out from the outer casing, the traction belt having a tail and a a leader; the traction belt is provided with a stop near the tail; the outer casing includes an opening disposed on the side wall, and a gate is respectively extended from the side wall of the rear side of the opening, A gate passage is defined between the inner sides of the two gates, the width of the gate passage being greater than the thickness of the traction belt and less than the thickness of the stop, and the maximum length of the traction belt from the gate passage being pulled out of the outer casing ends The stop is when the two gates are stopped. The telescopic traction belt of claim 1, wherein the outer casing further comprises a door gear extending from the side wall of the front side of the opening to the same side of the gate, and a door stop is defined between the inner sides of the two door gears. a channel, and the inner side of the two door gears respectively maintain a gap with the inner side of the two gates; the doorway passage is formed directly in front of the gate passage, and the width of the doorway passage is greater than the thickness of the traction belt Less than the thickness of the stop; the gate is curved into an arc shape in a direction in which the traction belt is pulled out, and the top and bottom edges of the gate are separated from the upper and lower casing walls, respectively, so that the gate is only The outer side is connected to the side wall and has elasticity. The telescopic traction belt of claim 1, wherein the outer casing is formed by an upper casing and a lower casing, the upper casing comprising all of the upper casing wall and a portion of the side casing wall; the lower casing The body includes all of the lower casing wall and another portion of the side casing wall, the central shaft being integrally formed with the lower casing wall. The telescopic traction belt of claim 1, wherein the traction belt includes a ring member coupled to the leader for attaching a strap, the strap connecting the ring member by a hook coupled to a front end thereof, and The telescopic traction belt is housed in a pouch that is sewn to a walking belt worn on a pet or a collar that is placed over the pet's neck so that the pet owner can pull the leash through the strap Constraint to control the pet. The telescopic traction belt according to claim 1, wherein the stop is formed by folding the tail of the traction belt toward the leading direction, and then folding back and stitching together with the belt of the traction belt. The telescopic traction belt of claim 1, wherein the stop is fixed to the traction belt after the individual materials are formed. The telescopic traction belt of claim 2, further comprising a guide disposed in front of the opening and located in front of the door, the guide comprising a tunnel and a guide suspended in the center of the tunnel; the traction belt A passage is formed between one of the side walls of the tunnel and the guide. The telescopic traction belt of claim 3, wherein the outer casing further comprises a ring concentric with the central axis and protruding from the upper surface of the lower casing wall; the reel has a roulette below the reel, the reel remains The ring rotates. The telescopic leash as claimed in claim 7, wherein the tunnel is trapezoidal and the width is decreased from the outside to the inside; the guide has a straight elliptical shape and is suspended by a cantilever extending from the other side wall of the tunnel. The telescopic traction belt of claim 9, wherein the outer surface of the two door gears is respectively provided with a latch, each side of the guide has a tongue and groove, and the guide uses the tongue and groove to mutually engage with the card Positioned in the opening of the outer casing.