CN-115552134-B - Fastening piece

Abstract

A fastener (10) for releasably securing a member includes a body (11) including a shank (13) and a recess (12), the recess (12) being configured for receiving the member. A door (21) is mounted to slide axially on the handle (13) between a closed position, in which it closes the mouth of the recess for holding said member, and an open position. Elastic means engage the door (21) and the handle (13) to urge the door (21) to the closed position, and latches (24) are mounted on opposite sides of the door (21), wherein each latch is self-closing and engages the body to hold the door in the closed position, thereby providing self-locking firmware that requires three independent actions to release for greater security.

Inventors

• R.W.SCHLIEPER
• Luke James Rich

Assignees

• MRM香港有限公司

Dates

Publication Date

20260508

Application Date

20210514

Priority Date

20200514

Claims (20)

1. 1. A fastener for releasably securing a member, the fastener comprising: a body including a shank having a shank axis and a recess having a mouth and configured to receive the member; A door mounted for axial sliding movement on the stem along the stem axis between a closed position in which the door closes the mouth of the recess for retaining the member and an open position; A resilient means engaging the door and the handle to urge the door to the closed position, and A pair of latches mounted on opposite sides of the door, wherein each of the latches is self-closing, drivingly engages the body to hold the door in the closed position, and is manually movable away from the body to release the door from the closed position.
2. 2. The fastener of claim 1, wherein the recess is disposed proximate one longitudinal end of the body.
3. 3. The fastener of claim 1, wherein the recess is defined by a hook-shaped portion of the body.
4. 4. A fastener according to claim 3, wherein the hook-shaped portion has a non-reentrant form.
5. 5. The fastener of claim 1, wherein the latches are similar, each latch including a latch lever pivotally mounted for rotation about a respective generally transverse pivot axis.
6. 6. The fastener of claim 5, wherein the latch lever is elongated generally in the direction of the shank axis, and each substantially transverse pivot axis lies substantially in a transverse plane transverse to the shank axis.
7. 7. The fastener of claim 5, wherein each substantially transverse pivot axis is disposed intermediate opposite longitudinal first and second ends of the respective latch rod, one of the first and second ends of each latch rod abutting a shoulder on the shank.
8. 8. The fastener of claim 7, further comprising a latch spring and a slot extending through the shank and substantially aligned with the shank axis, wherein the latch spring is received in the slot such that opposite ends of the latch spring abut a respective one of the latch levers to urge the one of the first and second ends inwardly to engage the shoulder.
9. 9. The fastener of claim 5, wherein a one-piece retainer extends through each latch rod to define a pivot axis for each of the latch rods.
10. 10. The fastener of claim 9, wherein the channel in the perimeter of the door receives a portion of the one-piece retainer.
11. 11. The fastener of claim 9, further comprising a latch spring received in a slot extending through the shank and substantially axially aligned, wherein the one-piece retainer comprises a length of wire first formed into a U-shape, the wire having two parallel arms inserted through the latch rod to permanently retain the latch rod and the latch spring before ends of the arms are bent together to form a loop.
12. 12. The fastener of claim 1, wherein the resilient means comprises a coil spring extending around the shank, one end of the coil spring engaging the door and the other end of the coil spring engaging a securing means adjacent one end of the shank.
13. 13. The fastener of claim 12, wherein the securing device is retained in a bore extending through the shank.
14. 14. The fastener of claim 12, wherein the securing means comprises one end of an elongate flexible member.
15. 15. The fastener of claim 1, further comprising a connector having a hooked end complementary to both the door and the hooked end of the body, wherein the connector engages the fastener to protrude from an axial end of the door and is secured by sliding the door to the closed position.
16. 16. A fastener for releasably securing a member, the fastener comprising: A body including a shank and a recess configured to receive the member and defined by a hook-shaped portion of the body; A door mounted for axial sliding on the handle between a closed position in which the door closes the mouth of the recess for holding the member and an open position; A resilient means engaging the door and the handle to urge the door to the closed position, and A pair of latch levers, each mounted for rotation about a respective substantially transverse pivot axis by a respective pivot, the pair of latch levers being mounted on opposite sides of the door, wherein each of the latch levers is generally axially elongated and is closed by a latch spring to engage the body for holding the door in the closed position.
17. 17. The fastener of claim 16, wherein a one-piece retainer extends through each of the latch bars to define a pivot axis for each of the latch bars.
18. 18. The fastener of claim 17, wherein a channel in a perimeter of the door receives a portion of the one-piece retainer.
19. 19. The fastener of claim 17, wherein the one-piece retainer comprises a length of wire first formed into a U-shape, the wire having two parallel arms that are inserted through the latch rod to permanently retain the latch rod and the latch spring before the ends of the arms are bent together to form a loop.
20. 20. The fastener of claim 16, wherein the resilient means comprises a coil spring extending around the shank, one end of the coil spring engaging the door and the other end of the coil spring engaging a securing means adjacent one end of the shank.

Description

Fastening piece Technical Field The present invention relates to fasteners, and more particularly to an automatically locking door control fastener that requires multiple independent actions to release to provide protection against unintended release. Background US8365365B2 describes a hook fastener with a sliding door that is urged by a spring to close the hook opening. It may be used to releasably secure an elongate flexible member such as a belt, sling, tether, rope, chain, or the like. A disadvantage of such fasteners is that the user must perform a separate manual action to rotate the keeper to place the door in its latched closed state. It will thus be appreciated that there is a need to provide a higher degree of security or protection against unintended release, which is available if the need for such separate manual action can be avoided. It is an object of the present invention to address the above-mentioned needs, or more generally, to provide an improved auto-lock door control fastener. Disclosure of Invention According to one aspect of the present invention, there is provided a fastener for releasably securing a member, the fastener comprising: a body including a stem and a recess configured to receive the member; A door mounted for axial sliding on the handle between a closed position in which the door closes the mouth of the recess for holding the member and an open position; A resilient means engaging the door and the handle to urge the door to the closed position, and A pair of latches mounted on opposite sides of the door, wherein each latch is self-closing and engages the body to retain the door in the closed position. The resilient means preferably comprises a member or assembly having resilience, such as a spring (e.g. coil spring, leaf spring, cantilever spring, gas spring), resilient member (e.g. elastomeric block), or the like. The latch may be any known type of latch, such as a sliding latch, a pivoting latch, or a latch that combines sliding and pivoting, and may be made self-closing by providing a resilient latch closure means, such as a spring (e.g., coil spring, leaf spring, cantilever spring, gas spring), a resilient member (e.g., elastomeric block), or the like. Preferably, the recess is disposed proximate one longitudinal end of the body. Preferably, the recess is defined by a hook-shaped portion of the body. Preferably, the hook-shaped portion has a non-reentrant form. Preferably, the latches are similar, each latch comprising a latch lever pivotally mounted for rotation about a respective generally transverse pivot axis. Preferably, the latch lever is generally axially elongated and the two substantially transverse pivot axes lie substantially in a transverse plane. Preferably, the pivot axis is disposed intermediate opposed first and second ends of the latch levers, one of the first and second ends of each latch lever abutting a shoulder on the handle. Preferably, a slot extends through the shank and is substantially axially aligned, opposite ends of a latch spring received in the slot abutting a respective one of the latch levers to urge the one of the first and second ends inwardly. Preferably, the second end protrudes from a concave circumferential surface of the door, most preferably from a conical concave surface. The shafts may be retained in corresponding bores in the body, each shaft pivotally supporting one of the latch levers. Preferably, however, a one-piece keeper extends through each latch lever to define each pivot. Preferably, the channel in the periphery of the door receives part of the one-piece retainer. Preferably, the one-piece keeper comprises a length of wire formed first into a U-shape having two parallel arms that are inserted through the latch lever to permanently retain the latch lever and latch spring before the ends of the arms are bent together to form a loop. Preferably, the resilient means comprises a coil spring extending around the handle, one end of the coil spring engaging the door and the other end engaging a securing means adjacent one end of the handle. Preferably, the securing means is retained in a bore extending substantially transversely through the shaft. Preferably, the securing means comprises one end of an elongate flexible member, such as a wire rope. The present invention provides a fastener that is effective and efficient in operational use and provides protection against accidental release by requiring three independent release actions (two separate latches and sliding of the door) and automatic locking. Drawings Preferred forms of the present invention will now be described, by way of example, with reference to the accompanying drawings, in which: FIG. 1 is an exploded view of a first embodiment of the fastener of the present invention; FIG. 1a is a partial cross-sectional view in a longitudinal plane through one end of the body of the fastener of FIG. 1; FIG. 2 is a perspective view of the fastener of FIG. 1 assembled in