TWI447310B - Safety hook - Google Patents

Description

Safety hook

The present invention relates to a safety hook, and more particularly to a safety hook having a safety lock.

The first figure shows a cross section of a conventional swivel hook (Shovel Snap Hook) 80. The rotating hook 80 includes a hook body 81 and a retaining latch 82 that supports the sliding of the hook body 81. One end of the hook body 81 forms a hook portion 85 for hooking the connector 70, such as a buckle collar 71 on a pet collar, a pet walking strap, etc.; the other end of the hook body 81 forms a journal 86 for mounting a swivel 83 . The swivel 83 is used to connect a webbing 90 or the like, such as a rope, chain, or the like. There is also a spring element 84 acting between the hook body 81 and the detachment latch 82 using a compressive force to hold the detachment preventing latch 82 in the position of the closing hook 85 by its elastic force, so that the hook portion 85 and the detachment preventing latch 82 are provided. A closed hole 87 is defined, thereby being interlocked with the buckle 71 for connection purpose.

The second figure is a cross section of another conventional rotary hook 80a. The rotating hook 80a is substantially identical to the rotating hook 80, and is also a hook body 81a having a hook portion 85a and a journal 86a, a retaining latch 82a for opening and closing the hook portion 85a, and a rotating ring 83a held by the journal 86a. And a spring element 84a supported between the hook body 81a and the detachment prevention latch 82a. The difference between the two rotary hooks 80 and 80a is that the latter anti-off latch 82a is hinged to the hook body 81a, and the spring member 84a is a torsion spring that acts using a torsional force, and the anti-latch 82a is normally held by the elastic force on the closed hook. The portion 85a is positioned to define a closed hole 87a that is interlocked with the buckle 71.

Further, the latches 82 and 82a of the above-described rotary hooks 80 and 80a each have a latching lever 88 and 88a projecting outward to facilitate the operation of the latches 82 and 82a. However, the protruding latching handles 88 and 88a are likely to be mis-actuated by the buckle 71 or other external force, and the latching latches 82 and 82a are automatically opened, causing the hooks 85 and 85a to open, causing the retaining ring 71 to fall off and be lost. Connections, when severe, can also cause accidents. For example, a dog that was originally fastened may have suddenly rushed out because of this accidental fallout, resulting in a car crash or even biting a passerby.

The present invention has been made to solve the above problems, and an object thereof is to provide a safety hook having a latching function, which can prevent the latching prevention from being erroneously opened and ensure safety.

The safety hook of the present invention comprises a hook body having an opening at the front end, a swivel ring at the end of the hook body, an anti-release bolt hinged inside the hook body, and a safety lock that is held to prevent the latch from sliding, and a spring supported between the hook body and the anti-latch, the latch arm of the anti-latch is normally closed by the elastic force of the spring, and the lower part of the latch arm has a notch, and the lower part of the opening defines a closed hole for The connected buckles interlock with each other. When the safety lock is slid to the locking position, the latching function can be generated for the anti-lifting latch, and the anti-lifting latch is prevented from being accidentally moved to open the opening, thereby causing the buckle to fall off from the hook body. When the safety lock is slid to the unlocking position, the anti-latch is allowed to be operated to swing outward, leaving the latch arm away from the opening of the hook body to release the buckle.

The utility model has the advantages of the conventional rotary hook, which has the possibility that the safety lock can lock the anti-latch, so that the anti-latch can be opened without being mistakenly prevented. The connector accidentally falls off, greatly improving the safety of the rotating hook.

The technical content and other objects and features of the present invention will be fully understood from the following description of the accompanying drawings.

As shown in the third to fifth figures, the safety hook 10 disclosed by the present invention is composed of a hook body 20, an anti-latch 30, a spring 40, a safety lock 50 and a swivel ring 60. among them: The hook body 20 includes an opening 21 provided at the front end, a passage connecting the safety hook 10 as a buckle 71 shown in the first figure, and a latch chamber 22 disposed inside and communicating with the opening 21 for receiving the anti-detachment. Latch 30. The hook body 20 further includes a journal 23 formed at the end, a recess 24 provided on one side, and a mounting hole 26 located below the opening 21, the function of which is left to be described later.

The anti-latch 30 is disposed in the latch chamber 22 of the hook body 20 and has a mounting hole 32 on the same axis as the mounting hole 26 for a fastener 25 such as a rivet to pass through. The latch 30 is hinged to the hook body 20 such that the latch-off latch 30 can swing relative to the hook body 20 with the fastener 25 as a fulcrum. Further, the detachment preventing latch 30 has a latch arm 31 extending to the upper portion of the opening 21 of the hook body 20 to open and close the opening 21 as the detachment preventing latch 30 swings. The lower side of the latch arm 31 further has a notch 33, and the notch 33 defines a closed hole 34 with the lower portion 27 of the opening 21 so as to be interlocked with the buckle 71 to achieve the connection. The anti-latch 30 further includes a chute 35 having a pair of latching holes 36 and a pair of unlocking holes 37 symmetrically disposed on the two side walls of the chute 35 for holding the safety lock 50 in the latching position and unlocking Used by the bit. The chute 35 may be provided inside the anti-latch 30 as shown in the fourth figure, but may be provided on the surface of the anti-latch 30. Anti-latch 30 further There is a notch 38 provided on the outside of the chute 35, which is aligned with the groove 24 of the hook body 20 to receive the operating handle 51 of the safety lock 50.

The spring 40 is an elastic member that automatically returns the anti-latch 30 to its original position. One end of the spring 40 abuts the tail 39 formed at the end of the anti-latch 30, and the other end is tensioned against the inner wall of the latch chamber 22, so that the latch arm 31 normally closes the upper portion of the opening 21 by its elastic force. In the embodiment of the drawings, the spring 40 is a compression spring that acts as a compressive force, and other equivalent elastic elements may be employed without being limited by the compression spring.

The safety lock 50, which is held by the chute 35 of the anti-latch 30, slides to lock or release the anti-latch 30. The safety lock 50 includes an operating handle 51 and a spring pin 52. The operating handle 51 is provided for the finger to move the safety lock 50 while facilitating the operation of the anti-latch 30. The spring pin 52 is a plate member extending inwardly from the inner side of the operating handle 51 and inserted into the sliding groove 35, and is elastically separated by being half-divided, and the free ends of the two opposite halves respectively protrude outward to form a protrusion. 53 engages with the latching pocket 36 or the unlocking pocket 37 in the chute 35 in conjunction with the sliding of the safety lock 50, thereby holding the safety lock 50 in the latched or unlocked position, thereby inhibiting or allowing the latch-up latch 30 to be operated. In the embodiment of the drawings, although the projection 53, the locking pocket 36 and the unlocking pocket 37 are all disposed in pairs, only one projection 53, a locking pocket 36 and an unlocking pocket 37 can achieve the same effect.

The swivel 60 has a shaft hole 61 and a journal 23 of the hook body 20 in a rotational fit, so that the swivel 60 can be coupled to the hook body 20 to rotate around the journal 23 to connect the webbing 90 shown in the first figure or the like. Things, such as ropes, chains, etc.

As shown in the fifth figure, according to the present invention, when the safety lock 50 is slid inwardly so that the projection 53 is fitted into the locking pocket 36, the operating handle 51 is simultaneously immersed in the hook body. In the groove 24 of the recess 20 and the notch 38 of the anti-latch 30, the latching function is generated on the anti-latch 30 by the operation of the handle 51 to sink into the hook body 20, so that the anti-latch 30 is kept in the locked state. The anti-latch 30 is prohibited from being operated when the safety lock 50 is not opened, and the possibility of the anti-latch 30 being erroneously moved is minimized, and the connected buckle 71 is prevented from accidentally falling off.

As shown in the sixth figure, when the safety lock 50 is slid outwardly so that the projection 53 is fitted into the unlocking hole 37, the operating handle 51 simultaneously withdraws from the recess 24 and the notch 38, thereby releasing the latching function of the anti-latch 30. The detachment preventing latch 30 is allowed to be operated via the operating handle 51 or the recess 28 formed above the latch arm 31 to swing the latching latch 30 outwardly, leaving the latch arm 31 away from the opening 21 of the hook body 20 to release the retaining ring 71. .

Of course, the above embodiments may be modified without departing from the scope of the invention, and all the matters included in the above description and the drawings are to be considered as illustrative and not limiting the scope of the invention. .

10‧‧‧Safety hook

20‧‧‧ hook body

21‧‧‧ openings

22‧‧‧Latch room

23‧‧‧ journal

24‧‧‧ Groove

25‧‧‧ fasteners

26‧‧‧Installation holes

27‧‧‧ lower

28‧‧‧ recess

30‧‧‧Anti-latch

31‧‧‧Latch arm

32‧‧‧Assembly holes

33‧‧‧ gap

34‧‧‧Closed hole

35‧‧‧Chute

36‧‧‧Locking points

37‧‧‧ unlocking hole

38‧‧‧ notch

39‧‧‧Tail

40‧‧‧ Spring

50‧‧‧Security lock

51‧‧‧Operation handle

52‧‧ ‧ spring bolt

53‧‧‧

60‧‧‧swing

61‧‧‧Axis hole

70‧‧‧Connectors

71‧‧‧ buckle

80,80a‧‧‧Rotating hook

81,81a‧‧‧Lepbody

82,82a‧‧‧Anti-latch

83,83a‧‧ ́s ring

84,84a‧‧. Spring

85,85a‧‧‧Hooks

86,86a‧‧‧ journal

87,87a‧‧‧closed hole

88,88a‧‧‧ shank

90‧‧‧webbing

The first picture is a cross-sectional view of a conventional rotary hook.

The second figure is a cross-sectional view of another conventional rotary hook.

The third figure is an external view of the invention in a locked state.

The fourth figure is an exploded view of the components of the present invention.

Figure 5 is a cross-sectional view of the present invention in a locked state.

Figure 6 is a cross-sectional view of the present invention in an unlocked state.

10‧‧‧Safety hook

20‧‧‧ hook body

21‧‧‧ openings

22‧‧‧Latch room

23‧‧‧ journal

25‧‧‧ fasteners

27‧‧‧ lower

28‧‧‧ recess

30‧‧‧Anti-latch

31‧‧‧Latch arm

33‧‧‧ gap

34‧‧‧Closed hole

35‧‧‧Chute

36‧‧‧Locking points

37‧‧‧ unlocking hole

38‧‧‧ notch

39‧‧‧Tail

40‧‧‧ Spring

50‧‧‧Security lock

51‧‧‧Operation handle

52‧‧ ‧ spring bolt

53‧‧‧

60‧‧‧swing

61‧‧‧Axis hole

Claims (4)

A safety hook comprises: a hook body having an opening disposed at the front end, a latch chamber disposed inside to communicate the opening, and a groove formed on one side; and an anti-latching device disposed in the latch chamber And being hinged to the hook body, having a latch arm extending to an upper portion of the opening, and a sliding slot having at least a locking hole and an unlocking hole, the latch arm having a notch below the lower portion of the opening Defining a closed hole, the outer side of the sliding slot is provided with a notch aligned with the groove; a spring is supported between the hook body and the anti-release latch, so that the latching arm normally closes the opening by its elastic force And a safety lock, comprising an operating handle and a spring bolt, the spring bolt is inserted into the sliding slot of the anti-latch and has at least one protrusion; when the safety lock is slid, the protrusion of the spring bolt is embedded When the locking groove of the chute is closed, the operating handle is immersed in the groove of the hook body and the notch of the anti-latch, and the anti-latch is kept in a locked state; when the safety lock is slid, the spring is latched When the protrusion is embedded in the unlocking hole of the sliding slot, the operating handle exits the groove and the notch The retaining latch to release the latching function, which allows the retaining bolt is operated to swing outwardly away from the opening so that the latch arms of the hook. The safety hook of claim 1, further comprising a swivel that rotates about a journal formed at an end of the hook. The safety hook of claim 1, wherein the anti-latch includes a pair of unlocking holes and a pair of locking holes respectively symmetrically disposed on the chute On the two side walls, the spring bolt is formed inwardly from the inner side of the operating handle, and is elastically separated by half, and the protrusion protrudes outward from the free ends of the two opposite halves of the spring bolt. Made into. The safety hook of claim 1, wherein the anti-latch further comprises a recess formed above the latch arm.