CN1333147C

CN1333147C - A tubular latch

Info

Publication number: CN1333147C
Application number: CNB2005100001005A
Authority: CN
Inventors: 柯林·悉尼·密得顿
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-01-09
Filing date: 2005-01-07
Publication date: 2007-08-22
Anticipated expiration: 2025-01-07
Also published as: GB0522475D0; TW200716841A; TW200523444A; TWI274099B; CN100465408C; GB0400441D0; CN1880715A; GB2409878A; CN1637223A; GB2418453B; GB2418453A; GB2409878B

Abstract

A tubular latch comprises a casing 1, a latch bolt lath in the form of a U-shaped strip (8,9,10) slidably mounted in the casing and an inner forend (3) having a central recessed area (4) secured to one end of the casing. A first spring (15) is arranged to act on the web (8) of the latch bolt lath to urge the latch bolt through an aperture in the inner forend and a follower (19) is arranged to act on one of the arms (9) of the latch bolt to retract the latch bolt lath against the action of the spring (15). The latch bolt is provided with a bolt head (11) which projects from the inner forend (3). A second spring in the form of a torsion spring (21) is coiled round the follower (19), one end (22) of the spring engaging in a slot in the follower and the other end (23) of the torsion spring engaging a side wall of the casing half (1). The follower has a central core containing an aperture for the reception of a spindle and a driving plate (26) with a shoulder (27) which is engageable with an upstand (17) projecting from the arm (9) of the latch bolt lath. The follower (19) can be turned by means of a handle or knob on a spindle extending through the central aperture in the follower and this turning movement of the follower entrains the latch bolt lath by virtue of the engagement of the upstand (17) by the shoulder (27) to retract the bolt head (11). An aperture (28) and a cut-out region (29) in the walls of the casing halves permit the use of bolt-through furniture.

Description

Tube type latch

Technical field

The present invention relates to a kind of improvement of tube type latch.

Background technology

A kind of form of existing tube type latch is to use a single spring, and this spring is set operates on the bolt latch.And aforesaid arrangement, because spring does not have enough strength and handle or knob can be reset to their original positions, so that this situation can not be used unsprung door handle or knob.If use powerful spring so that the suitable strength that resets to be provided, the strength that then imposes on the bolt latch will be excessive.

So far, be to use first spring on this bolt latch, to operate once being used for solution to the problems described above, and use second spring on driven pulley, to operate.The collocation mode of this kind just can allow relative light-dutyer spring to operate on this bolt latch, and the spring of a brute force then operates on driven pulley simultaneously, to be fit to the use of unsprung handle or knob.A major defect of this kind collocation mode is: can use coil spring earlier, this will not be suitable for the use that latch is worn the door lock of attached formula.

Summary of the invention

The object of the present invention is to provide a kind of tube type latch to overcome the problem of above-mentioned prior art collocation mode, wherein this tube type latch is one can accept the door lock that latch is worn attached formula, and this tube type latch can use the door handle without mounting spring.

The invention provides a tube type latch in view of the above, it comprises housing, one bolt latch, be mounted slidably in this housing, one inner forestock, be fixed in this housing one end, first spring, be arranged on this bolt latch and operate, protrude out from housing after impelling this bolt latch to pass perforate in the inner forestock, also comprise a driven pulley, be arranged on this bolt latch and operate, to resist the running of this first spring, this bolt latch of pulling back, wherein this driven pulley provides second spring of tool torque spring form, whereby, this bolt can be operated without the door handle of mounting spring, and wherein this bolt latch has the bolt pinboard of a U-shaped strip, has fork to be located on this bolt pinboard thin slice, and wherein the support arm of this U-shaped strip provides a male member, this male member is arranged in the elongated perforation of housing one, and this male member can support an end of this perforation, can limit the bolt pinboard in the housing.

According to a preferred embodiment of the present invention, this driven pulley comprises a central core district, it has a perforation, rotating shaft with a ccontaining door lock, one driving-disc is positioned near the perforation in central core district, and this driving-disc can be bonded with each other with this bolt pinboard, and a shoulder supports mutually with in vivo a fixed point.

This fixed point comprise one on the wall of this housing projection and the body of rod that goes out.

This second spring, one end engages with this driven pulley, and a zone line is wound on this driven pulley, and the other end of this torque spring then can not engage with the assembly that driven pulley rotates with one.

One termination of this second spring is combined among the hole or hole of this driven pulley.

One end of this second spring engages with a male member on the driven pulley.

The assembly that can not rotate with driven pulley that engages with the other end of this torque spring is a sidewall of this housing.

This housing provides at least one hole that runs through to pass through for the rotating shaft of handle or knob, and this rotating shaft is suitable for being arranged in the perforation of driven pulley.

This housing provides at least one hole, and the latch of wearing attached formula door lock for latch passes.

This bolt latch has a fork, and it is established from inner forestock is prominent, and this fork can be rotatably set on this bolt pinboard, and whereby, fork can be suitable for the bolt that left hand or the right hand grip with generation via 180 ° rotation.

This inside forestock comprises the disk body with depressed part, and this fork is arranged in this depressed part.

To elaborate with the accompanying drawing illustrated embodiment for the present invention now.

Description of drawings

Fig. 1 is the front elevation drawing according to an embodiment of bolt of the present invention;

Fig. 2 for along Π among Fig. 1-Π line direction of arrow cut open sectional view, and

Fig. 3 is the plane full view of the bolt among Fig. 1 and Fig. 2.

Drawing reference numeral explanation: half housing 1,2; Inner forestock 3; Concavity district 4; Ear 5; The body of rod 6,7; Rectangular thin slice 8;

Support arm

9,10; Fork 11; Latching 12; Space bar 13; Central uplift zone 14; Coil spring (first spring) 15; Depressed area 16; Cylinder 17; Depressed area 18; Driven pulley 19; Opening 20; Torque spring 21; One end 22 of torque spring; The other end 23 of torque spring; Cam pack 24; Shoulder 25; Cam pack (driving-disc) 26; Shoulder 27; Hole 28; Excision portion 29; Outside forestock panel 31; Perforate 32.

The specific embodiment

Consult accompanying drawing, comprise a tubular shell according to bolt of the present invention, it is made up of two 1,2 of half housings that are suitable for mutually combining.Inside forestock 3 with a concavity district 4 is arranged on the end of this half housing 1,2 that mutually combines, and this forestock is by the dash forward ear 5 that sets out and fixing of an end that is formed on this half housing 1,2.The other end of these half housings all provides the aperture that is a straight line, and has a pair of body of rod 6,7 to be positioned among this aperture.

One bolt pinboard is mounted slidably in this housing, and this bolt pinboard is made up of a rectangular thin slice 8 and

several support arms

9 and 10 formed U-shaped strips.Fork 11 is located on the rectangular thin slice 8 of this bolt pinboard by latching 12, can rotate with this rectangular thin slice to cause this fork.When the normal position of bolt pinboard, this fork 11 is to be positioned among the depressed area 4 of this forestock 3, and this fork and this depressed area distance slightly, so that this fork can be with these forestock 3 rotations.

One space bar, 13 clips are in the narrow hole of this 2 half housing, and this space bar has a central uplift zone 14, for an end of placing a coil spring 15.The other end of this coil spring 15 then is positioned at the rear end of this latching 12, and therefore, this coil spring can be pushed the bolt pinboard to face to the direction of forestock 3, makes it to withdraw from outside the shell.

The bolt pinboard one of support arm 9 support brachium than another, and should be provided with a depressed area 16 by long support arm 9, it ends at a cylinder 17 that protrudes, this cylinder 17 is arranged in the 18 formed narrow holes, depressed area on the sidewall of these half housings 1,2.The scope that this bolt pinboard moves be able to be limited in the position of cylinder 17 in narrow hole in housing.

Each half housing also provides an annular breach, and two ends of driven pulley 19 then are arranged in these breach.This driven pulley is provided with the opening 20 of a square truncation surface, with the rotating shaft (figure does not show) of a ccontaining door handle assembly.One torque spring 21 is located at the round middle section of this driven pulley 19, one end 22 of this torque spring is incorporated among the narrow hole of this driven pulley, the other end 23 of this torque spring then combines with a sidewall of this half housing 1, and the position of combination is the depressed area 16 that is arranged on the bolt pinboard support arm 9.

This driven pulley 19 has the first radial cam pack 24 that stretches out, and it has a shoulder 25, and this shoulder is to offset with this body of rod 6 by the running of this torque spring 21.This driven pulley 19 also has the second radial cam pack 26 that stretches out, and it has a shoulder 27, and this shoulder is to combine with cylinder 17 on the bolt pinboard.17 of this cylinders are to offset with this shoulder 27 by the strength of coil spring 15.

This two and half housing 1,2 also is provided with the hole 28 of straight line and is provided with excision portion 29 away from this forestock 3 in the housing rear end.

In use, will be arranged in the aperture of door of the similar item of door or door according to bolt housing of the present invention.Hole 28 in housing and excision portion 29 can make this latch pass through, so the door lock (as the door lock of handle or knob and so on) that latch is worn attached formula just can be assemblied on the similar articles of door or door.The square truncation surface rotating shaft that two ends are provided with handle or knob is to be located among the opening 20 of these driven pulley 19 square truncation surfaces.This fork 11 can rotate according to the demand mode of the similar item of being opened door or door by left hand or right-hand lay.Forestock 3 outside being located at this inside forestock 3 outside forestock panel 31 and be fixed on the similar item of door or door, fix then and interted the screw of perforate 32 on outside forestock or the panel, this screw also passes the straight line perforate in the inner forestock, and the last interlock of this screw (screwing togather) is among door or fellow's entity material.

If swing handle or knob, this square rotating shaft will make driven pulley 19 rotations, and prop up the running of torque spring 21, and this shoulder 27 will force this cylinder 17 to prop up the running of coil spring 15, come mobile bolt pinboard to enter into this housing, whereby, bolt fork 11 also can move in this housing in the lump, so that can open door or the fellow who does not have bolt.And when decontroling handle, the strength of torque spring 21 will mobile driven pulley, make it be back to a certain position again, in this position, shoulder 25 offsets with the body of rod 6, and this shoulder 27 can return back to a certain position simultaneously, in this position, coil spring 15 can force fork 11 outstanding in housing, and the mobile combination that only can be subject to the cylinder 17 on shoulder 27 that should be outstanding.

The tensile strength of this coil spring 15 can get final product because it only need operate slight elastic force to the bolt pinboard less than the tensile strength of this torque spring 21.And suppose that this elastic force is between 6 to 12N T.The powerful torque spring of healing then can more make the use of unsprung handle become possibility, because these unsprung handles can be returned to normal position by the strength of this torque spring 21.

The present invention is not restricted to the described embodiments, but can make the variation and the modification of equivalence according to it.For example, an end of torque spring is not arranged in the narrow hole of this driven pulley 19, and is arranged in the hole of driven pulley, perhaps makes an end of this torque spring 21 and does the arrangement that engages with the male member on driven pulley.

Claims

1, a kind of tube type latch, comprise a housing, one bolt latch, be located at slidably in this housing, one inner forestock, be fixed on an end of this housing, one spring, be set on this bolt latch and operate, protrude from outside this housing to impel this bolt latch to pass the perforate on this inside forestock, also comprise a driven pulley, be set on this bolt latch and operate the running of resisting this spring to pull back this bolt latch, wherein this driven pulley provides second spring of torque spring form, this bolt can be operated by the handle that does not have spring whereby, and wherein this bolt latch has the bolt pinboard of a U-shaped strip, and the rectangular thin slice of this U-shaped strip bolt pinboard is provided with a fork, and a support arm of this U-shaped strip provides a male member, this male member is arranged in a microscler hole of housing, and this male member props up an end of this hole, with the bolt pinboard in the restriction housing.

2, tube type latch as claimed in claim 1, wherein this driven pulley comprises a central core district, it has a perforation, rotating shaft with a ccontaining door lock, one driving-disc is positioned near the perforation in central core district, and this driving-disc can be bonded with each other with this bolt pinboard, and a shoulder supports mutually with in vivo a fixed point.

3, tube type latch as claimed in claim 2, wherein this fixed point comprise one on the wall of this housing projection and the body of rod that goes out.

4, tube type latch as claimed in claim 1, wherein this second spring, one end engages with this driven pulley, and a zone line is wound on this driven pulley, and the other end of this torque spring then can not engage with the assembly that driven pulley rotates with one.

5, tube type latch as claimed in claim 4, wherein a termination of this second spring is combined among the hole or hole of this driven pulley.

6, tube type latch as claimed in claim 4, wherein an end of this second spring engages with a male member on the driven pulley.

7, tube type latch as claimed in claim 4, wherein the assembly that can not rotate with driven pulley that engages with the other end of this torque spring is a sidewall of this housing.

8, tube type latch as claimed in claim 1, wherein this housing provides at least one hole that runs through to pass through for the rotating shaft of handle or knob, and this rotating shaft is suitable for being arranged in the perforation of driven pulley.

9, tube type latch as claimed in claim 8, wherein this housing provides at least one hole, and the latch of wearing attached formula door lock for latch passes.

10, tube type latch as claimed in claim 1, wherein this bolt latch has a fork, and it is dashed forward from inner forestock and establishes, and this fork can be rotatably set on this bolt pinboard, whereby, fork can be suitable for the bolt of left hand or right hand gripping via 180 ° rotation with generation.

11, tube type latch as claimed in claim 10 wherein should comprise the disk body with depressed part by the inside forestock, and this fork is arranged in this depressed part.