CN1225967A

CN1225967A - Three-pawl lock

Info

Publication number: CN1225967A
Application number: CN 99113438
Authority: CN
Inventors: 卞建政
Original assignee: Changzhou Lingtong Exhibition Products Co Ltd
Current assignee: Changzhou Lingtong Exhibition Products Co Ltd
Priority date: 1999-01-28
Filing date: 1999-01-28
Publication date: 1999-08-18
Anticipated expiration: 2019-01-28
Also published as: CN1079655C

Abstract

The three-pawl lock comprises lock shell, lock plate, lock core and eccentric lock wheel. On the lock plate there are two long grooves extended to foont end from respective middle to form three striking plates of left, right and middle on it, the front end of every striking plate is made into the form of U-shaped crotch, and its left and right side striking plates are symmetrical, and every long groove is divided into front, middle and rear three parts, in which the front part and rear part are identical in width, and the width of the middle part is large, so that the front portion of two side striking plates is wider than their rear portion, and the rear portion of the middle striking plate is wider than its front portion, and the rear portion of the middle striking plate is equipped with a forwards supported raker whose raised head is closely pressed on the inside bearing surface of the lock shell, and the oblique plane of three striking plates are closed up to the oblique bearing surface in the front of the lock shell, and the width of said oblique bearing surface is larger than that of oblique surface of striking plate.

Description

Three-pawl lock

The present invention relates to a kind of three-pawl lock, belong to exhibition apparatus.This three-pawl lock is used for the connection of movable exhibition framework as connector.

Chinese patent 87206373U proposes a kind of three-pawl lock, though the point of many deficiencies is still arranged after this lockset to the improvement of former tapered end, improves, relation and structure as three plate tongues, reach the locality of spike on the plate tongue, owing to stick up elastic force deficiency rearward, the supporting deficiency of three plate tongues etc.

The present invention is the improvement to above-mentioned patented technology, and it is bigger to propose a kind of supporting force, and spike is towards rational three-pawl lock.

Technical scheme of the present invention is: a kind of three-pawl lock, by lock housing, jam plate, the eccentric lock wheel constitutes, there are two on the jam plate from the middle elongated slot that extends to front end always, and three plate tongues of two sides and centre about having on the formation jam plate, plate tongue front end is the U-shaped crotch, about two side plate tongue symmetries, elongated slot is not wide elongated slot, divide leading portion, three sections of stage casing and back segments, the two sections width in front and back equate that the stage casing width is big, thereby form in three plate tongues, two side plate tongues, anterior wide than the rear portion, the intermediate plate back of tongue is anterior wide, has spike at the rear of intermediate plate tongue, spike is towards the place ahead, the spike nose is pressed on the bearing surface of lock housing inboard, and the inclined-plane of three plate tongues is close on the oblique bearing surface in lock housing the place ahead, and the width of the oblique bearing surface of lock housing is greater than the width on plate tongue inclined-plane.

Because reasonable, thereby obtain three plate tongues that supporting force is big to the shaped design of three elongated slots, and the spike position, towards change, improved the bearing capacity of lockset, finish the invention task.

Fig. 1 is the lock housing embodiment of three-pawl lock of the present invention.

Fig. 2 is the vertical view of Fig. 1.

Fig. 3 is the A-A sectional view of Fig. 2.

Fig. 4 is the jam plate embodiment of three-pawl lock.

Fig. 5 is the vertical view of Fig. 4.

Fig. 6 is the overall construction drawing of two pawl locksets.

Fig. 7 is the utilization structure figure of three-pawl lock.

Be described in detail the present invention below in conjunction with accompanying drawing.

Three-pawl lock of the present invention is by lock housing (1), jam plate (2), eccentric lock wheel (3) constitutes, there are two on the jam plate (2) from the middle elongated slot that extends to front end always, and three plate tongues of two sides and centre about having on the formation jam plate, plate tongue front end is the U-shaped crotch, about two side plate tongue (21) (23) symmetries, elongated slot is not wide elongated slot, divide leading portion (41), stage casing (42) and (43) three sections of back segments, the two sections width in front and back equate, the stage casing width is big, thereby form in three plate tongues, two side plate tongues (21), (23) anterior wide than the rear portion, intermediate plate tongue (22) rear portion is anterior wide, have spike (24) at the rear of intermediate plate tongue, spike is towards the place ahead, and spike nose (241) is pressed on the inboard bearing surface (141) of lock housing (1), the inclined-plane of three plate tongues (231), (211), (221) be close on the oblique bearing surface (131) (121) (111) in lock housing (1) the place ahead, the width of the oblique bearing surface of lock housing is greater than the width on plate tongue inclined-plane.(Fig. 1,2,3,4,5,6)

Lock housing (1) three the oblique bearing surfaces in the place ahead (111), (121), (131) have partition wall (101) to link to each other, and form not independent, unseparated integral body.

Root two sides of spike (24) have aperture (25).

The rear end of plate tongue (2) bends to U-shaped semi-ring (26).The work plane (361) of the end face of U-shaped semi-ring (261) and eccentric lock wheel is fitted, when rotating the eccentric lock wheel as the active force face of mobile jam plate (2).

During the three-pawl lock assembling, earlier jam plate (2) is inserted by lock housing (1) rear end cavity, be about to eccentric lock wheel (3) after inserting and snap in vestibule (53), this the time make the vestibule (53) of cavity (5) and lock housing (1) on the jam plate (2) be in same position, jam plate (2) can be fixed in the lock housing, form the lockset that constitutes one by lock housing (1), jam plate (2), eccentric lock wheel (3).

During use, push eccentric wheel (3) and be about to three-pawl lock and place in the cavity of a special-shaped hollow pole stock (6), the fixedly hole (61) of eccentric lock wheel (3) is arranged on pole stock (6) face, thus the fixing position of lockset on pole stock (6).Rotation eccentric lock wheel, this the time plate tongue inclined-plane (231) (221) (211) along oblique bearing surface (131) (121) (111) slippage backward of lock housing (1), move behind the spike simultaneously, three U-shaped crotches to two sides separately, two lateral bending hook direction unanimities, middle crotch opens to other direction, thereby fixedlys connected with special pipe (7) formation.(Fig. 7)

Because a series of technological improvement of the present invention makes three-pawl lock of the present invention seem practical, reliable, syndeton intensity height connects the exhibition rack bearing intensity height that the back forms.

Claims

1, a kind of three-pawl lock, by lock housing (1), jam plate (2), eccentric lock wheel (3) constitutes, there are two on the jam plate (2) from the middle elongated slot that extends to front end always, and three plate tongues of two sides and centre about having on the formation jam plate, plate tongue front end is the U-shaped crotch, it is characterized in that: about two side plate tongue (21) (23) symmetries, elongated slot is not wide elongated slot, divide leading portion (41), stage casing (42) and (43) three sections of back segments, the two sections width in front and back equate, the stage casing width is big, thereby form in three plate tongues, two side plate tongues (21), (23) anterior wide than the rear portion, intermediate plate tongue (22) rear portion is anterior wide, has spike (24) at the rear of intermediate plate tongue, spike is towards the place ahead, spike nose (241) is pressed on the inboard bearing surface (141) of lock housing (1), the inclined-plane of three plate tongues (231), (211), (221) be close on the oblique bearing surface (131) (121) (111) in lock housing (1) the place ahead, the width of the oblique bearing surface of lock housing is greater than the width on plate tongue inclined-plane.

2,, it is characterized in that lock housing (1) three the oblique bearing surfaces in the place ahead (111), (121), (131) have partition wall (101) to link to each other, and form not independent, unseparated integral body by the described three-pawl lock of claim 1.

3,, it is characterized in that root two sides of spike (24) have aperture (25) by the described three-pawl lock of claim 1.

4,, it is characterized in that the rear end of plate tongue (2) bends to U-shaped semi-ring (26) by the described three-pawl lock of claim 1.

5, by claim 1,4 described three-pawl locks, the end face (261) that it is characterized in that the U-shaped semi-ring is fitted with the work plane (361) of eccentric lock wheel, when rotating the eccentric lock wheel as the active force face of mobile jam plate (2).