CN101225846A

CN101225846A - Automatic locking mechanism

Info

Publication number: CN101225846A
Application number: CNA2008100262282A
Authority: CN
Inventors: 龚伟良
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-02-02
Filing date: 2008-02-02
Publication date: 2008-07-23

Abstract

The invention discloses an automatic locking mechanism, which is characterized in that a guiding chute is arranged on a bottom plate; a slide bar can move longitudinally in the guiding chute; one end of the slide bar is articulated with a rotatable locking block; the locking block is rectangular, wherein, the size of the width direction is slightly smaller than the chute width, and the size of the length direction is slightly greater than the chute width; two opposite sides on the length direction are curved inwards to form a bayonet; a stop pin is fixed at one end of the guiding chute; the radial center line of the stop pin is deviated from the center line of the locking block; when the guiding chute is near the center line of the stop pin, the short side wall of the stop pin center line is shorter than the long side wall on the other side, so, a space not obstructing the rotation of the locking block can be kept. The automatic locking mechanism has the advantages of simple structure, lower accuracy requirement and reliable action.

Description

A kind of automatic locking mechanism

Technical field

The present invention relates to a kind of reciprocating automatic locking mechanism that limits.

Technical background

A kind of mechanism such as need are two fixed-site, as the Kai Heguan of door, the automotive seats chair back face upward down and upright, and the amounting to and upspring etc. of chair headrest frame needs to use locking mechanism that it is lock onto a certain fixed position usually.Existing locking mechanism mainly contains elastic clip compact form, latch locate mode and dead point biting type etc.The locking mechanism of these forms, the structure that has are complicated partially, and the operation that has is trouble, though structure that has and operation are comparatively simple, lock not too reliably, or can not bear bigger external force.

The patent No. is that 200510121418.9 Chinese patent discloses a kind of locking mechanism, it comprises base plate and locking plate, have guide chute on base plate and the locking plate, the end cross size of groove enlarges and forms a rotation chamber that can supply lock dog to rotate within it, rotate in the chamber boss is arranged, slide bar drives lock dog and can vertically move along groove in groove, and lock dog may be stuck in notch, makes slide bar locking.Because above-mentioned locking mechanism comprises base plate and locking plate, and the chute end also has and rotates the chamber, so its structure is comparatively complicated.And, the chute on base plate, the locking plate and rotate the chamber, required precision is very high, otherwise the position is corresponding inaccurate or cavity is excessive or too small, all can have influence on the use of locking mechanism.

Summary of the invention

The object of the present invention is to provide a kind of simple in structure, not only lower, but also the automatic locking mechanism of reliable in action of required precision.

Automatic locking mechanism of the present invention, base plate has guide chute, slide bar can vertically move in chute, the hinged rotating lock dog in slide bar end, lock dog is rectangle, the undersized of its width direction is slightly larger than groove width in the size of groove width, length direction, the curved one-tenth bayonet socket that concaves of two opposite side on the length direction, at the end of chute constant resistance pin, the radial centre lines of blocking pin departs from the center line of lock dog, the short sidewall of the close blocking pin center line of chute is short than another length of side sidewall, leaves and does not hinder the space that lock dog rotates.

Automatic locking mechanism of the present invention, slide bar can move in chute, and when promotion slide bar drive lock dog moved to blocking pin, lock dog was touched blocking pin and is rotated, and the bayonet socket on its length direction is stuck in long side wall ends, and slide bar can't be return, thus auto lock.Promote slide bar once more, lock dog is touched blocking pin once more and is rotated, and the bayonet socket on its length direction leaves long side wall ends, go back to narrower width direction aligned notches, because therefore the size of width direction is less than groove width,, this moment, lock dog will be with the slide bar travelling backwards of sliding, thereby realized automatic unlocking.This locking mechanism structure is simple, and required precision is not high; Its need are by promoting or the pulling slide bar can be realized auto lock and release to locking mechanism, thereby easy to operate.

Locking mechanism of the present invention can be used for the Kai Heguan of door, and when opening the door, the promotion door promptly drives slide bar and moves, and makes lock dog move to the blocking pin touching, rotate, and lock dog blocks slide bar can't be return, and door is locked and can not closes; After promoting door once more, lock dog rotates and with slide bar travelling backwards chute, door is release.In addition, above-mentioned locking mechanism also can be used for facing upward down of seat back and upright, the amounting to and mechanism such as upspring of chair headrest frame.

Description of drawings

Fig. 1 is the plan view of locking mechanism;

Fig. 2 is the schematic representation of slide bar reach back lock dog operating state;

Fig. 3 is the schematic representation of locking mechanism locking state;

Fig. 4 is the schematic representation of another kind of locking mechanism;

Fig. 5 is the schematic representation of another locking mechanism.

Embodiment

As shown in Figure 1, automatic locking mechanism of the present invention, base plate 1 has guide chute 2, slide bar 3 can vertically move in chute 2, the hinged rotating lock dog 4 in slide bar 3 ends, lock dog 4 is rectangle, the undersized of its width direction is in groove width, the size of length direction is slightly larger than groove width, the curved one-tenth bayonet socket 5 that concaves of two opposite side on the length direction, at the end of chute 2 constant resistance pin 6, the radial centre lines of blocking pin 6 departs from the center line of lock dog 4, and the short sidewall 2A of close blocking pin 6 center lines of chute 2 is short than another length of side sidewall 2B, leaves and does not hinder the space that lock dog rotates.

As Fig. 2, shown in Figure 3, vertically move along chute 2 when promoting slide bar 3, and when driving lock dog 4 and moving to blocking pin 6, lock dog 4 to be touched blocking pins 6 and is rotated, the bayonet socket 5 on its length direction is stuck in long sidewall 2B end, and slide bar 3 can't be return, thus auto lock.As shown in Figure 1, promote slide bar 3 once more, lock dog 4 is touched blocking pin 6 once more and is rotated, bayonet socket 5 on its length direction leaves long sidewall 2B end, go back to narrower width direction aligned notches, because therefore the size of width direction is less than groove width,, this moment, lock dog 4 will be with slide bar 3 travelling backwards of sliding, thereby realized automatic unlocking.

Because when slide bar 3 was return, lock dog 4 was in rotation process, the long sidewall friction of its longwell and chute 2 has resistance, lock dog 4 is rotated have some setbacks.In order to improve the fluency of locking when the release, as shown in Figure 4, be cambered surface 7 away from the end of the long sidewall 2B of blocking pin 6 center lines; Or as shown in Figure 5, two opposite side on lock dog 4 width directions have concave arc 8.

Claims

1. automatic locking mechanism, base plate (1) has guide chute (2), slide bar (3) can vertically move in chute (2), the hinged rotating lock dog in slide bar (3) end (4), lock dog (4) is rectangle, the undersized of its width direction is in groove width, the size of length direction is slightly larger than groove width, the curved one-tenth bayonet socket (5) that concaves of two opposite side on the length direction, at the end of chute (2) constant resistance pin (6), the radial centre lines of blocking pin (6) departs from the center line of lock dog (4), the short sidewall (2A) of close blocking pin (6) center line of chute (2) is short than another length of side sidewall (2B), leaves and does not hinder the space that lock dog rotates.

2. automatic locking mechanism according to claim 1 is characterized in that: the end away from the long sidewall (2B) of blocking pin (6) center line is cambered surface (7).

3. automatic locking mechanism according to claim 1 is characterized in that: two opposite side on lock dog (4) width direction have concave arc (8).