CN100370152C

CN100370152C - Automatic locking mechanism

Info

Publication number: CN100370152C
Application number: CNB2005101214189A
Authority: CN
Inventors: 龚伟良
Original assignee: Ma Zhitang
Current assignee: Ma Zhitang
Priority date: 2005-12-31
Filing date: 2005-12-31
Publication date: 2008-02-20
Anticipated expiration: 2025-12-31
Also published as: CN1811206A

Abstract

The present invention discloses an automatic locking mechanism. The bottom board of the present invention is provided with a guide sliding chute; a sliding rod which is arranged in the sliding chute can longitudinally move along the sliding chute, and the end part of the sliding rod is hinged with a rotatable locking block; the size of the width direction of the locking block is smaller than the width of the sliding chute, and the size of the long direction is larger than the width of the sliding chute, which causes locks to slide in the sliding chute or to be clamped in a notch; the width of the end part of the sliding chute is enlarged to form a rotating cavity, the locking block can rotate in the rotating cavity, and the edge of the rotating cavity is provided with two shifting parts which can shift the locking block to rotate. The size of the width direction of the locking block is smaller than the width of the sliding chute, and the size of the long direction is larger than the width of the sliding chute, so when the locking block is shifted to aim the long direction at the notch, the locking block can be clamped and can not be pulled, which causes the sliding rod to be locked; when the locking block is shifted to aim the width direction at the notch, the sliding rod is unlocked. The present invention which has the advantages of simple structure, convenient operation and firm and reliable locking can bear larger outer force.

Description

A kind of automatic locking mechanism

Technical field

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

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.

Summary of the invention

The object of the present invention is to provide a kind of simple in structurely, easy to operate, and reliable lock can be born the automatic locking mechanism of bigger external force.

Automatic locking mechanism of the present invention, base plate has guide chute, slide bar can vertically move along groove in groove, the hinged rotating lock dog in slide bar end, the undersized of the width direction of lock dog in the size of groove width, length direction greater than groove width, make lock dog can be in groove slippage or be stuck in notch, the end cross size of groove enlarges and forms the rotation chamber that can rotate for lock dog within it, there is all right one way or the other platform of dialling that lock dog rotates of stirring at the edge that rotates the chamber.

Automatic locking mechanism of the present invention, its lock dog width direction size is different with lengthwise dimension, vertically move along groove when promoting slide bar, driving lock dog moves to when rotating in the chamber, lock dog can be stirred by group platform in the chamber and rotate to than the cross direction aligned notches, greater than groove width, thereby lock dog can be stuck and can't spur than the cross direction size, thereby makes slide bar locking.Promote slide bar once more, narrower direction aligned notches be stirred and be gone back to lock dog will by the platform of dialling in the chamber once more, and narrower direction size is less than groove width, thereby this moment, lock dog will slide with slide bar, thereby realization is to the release of slide bar.This locking mechanism structure is simple, long service life, and required precision is not high, and cost is low; It is by promoting and the pulling slide plate can be realized locking and release to it, thereby easy to operate.Simultaneously, the locking of mechanism is to be stuck in notch by lock dog to realize, its locking firmly, reliably can be born bigger external force.

Description of drawings

Fig. 1 is the sectional view of automatic locking mechanism;

Fig. 2 is plan view and the locking mechanism locking state schematic representation of Fig. 1;

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

Fig. 4 is the schematic representation of automatic locking mechanism;

Fig. 5 is the schematic representation of automatic locking mechanism;

Fig. 6 is the schematic representation of automatic locking mechanism;

Fig. 7 is for using the chair headrest frame of automatic locking mechanism of the present invention.

Embodiment

Embodiment 1, as Fig. 1,2,3, a kind of automatic locking mechanism, its base plate 1 has guide chute 2, and slide bar 3 inserts in can be along groove 2 longitudinal sliding motions in the groove 2, the hinged lock dog 4 in slide bar 3 ends turns, lock dog 4 is a rectangle, the one opposite side song that concaves, the undersized of lock dog 4 width directions in the size of groove width, length direction greater than groove width, the end cross size expansion of groove forms a rotation chamber 5 that can supply lock dog 4 to rotate within it, and the edge that rotates chamber 5 has two can stir group platforms 6 that lock dog 4 rotates.

In order to prevent that lock dog 4 from dropping from slide bar 3, can a cover plate 7 be installed above base plate 1, as Fig. 4, it can prevent that lock dog 4 from dropping, and can prevent that again foreign matter from entering chute 2 and influencing mechanism's proper functioning.

In the present embodiment, base plate 1 can closely be formed by connecting by the locking plate 1c that substrate 1a, the guide plate 1b discord that has a guiding groove have a lock groove, as Fig. 4.

Lock dog 4 rotates more flexiblely when making release, and in the present embodiment, a side of rotating chamber 5 is a circular arc.

Embodiment 2, and as shown in Figure 5, another kind of automatic locking mechanism of the present invention, its lock dog 4 are oval, and all the other are identical with embodiment 1.Lock dog 4 locking states are shown in dotted line.

Embodiment 3, as shown in Figure 6, another kind of automatic locking mechanism of the present invention, its lock dog 4 is a rectangular, all the other are identical with embodiment 1.

Embodiment 4, as shown in Figure 7, a kind of chair headrest frame that uses automatic locking mechanism of the present invention, it includes the headrest-plate 8 that is fixed on the headrest, and it is hinged that headrest-plate 8 passes through upper and lower supporting bar 9,10 and upper and lower hinge plate 11,12 and side plate 13, and 13 of lower flap 12 and side plates are connected with elastic component 14, this elastic component 14 can be cylinder or stage clip, present embodiment is a cylinder, and the slide bar 3 of automatic locking mechanism 15 links to each other with lower flap 12, and its base plate 1 links to each other with side plate 13.When the headrest frame is in when erecting state, push headrest downwards to amounting to the position, locking mechanism 15 is fixed in pillow and amounts to the position, slide bar 3 lockings as Fig. 8.Push headrest once more, slide bar 3 releases, thus pillow is upspring once more.

Claims

1. automatic locking mechanism, it is characterized in that: have base plate, base plate (1) is by substrate (1a), guide plate (1b) and locking plate (1c) are formed, base plate (1) has guide chute (2), slide bar (3) is in chute (2), can vertically move along chute (2), the hinged rotating lock dog in slide bar (3) end (4), the undersized of the width direction of lock dog is in groove width, the size of length direction is greater than groove width, make lock dog (4) can be in groove slippage or be stuck in notch, the end cross size of chute enlarges and forms a rotation chamber (5) that can supply lock dog (4) to rotate within it, and there is all right one way or the other group platform (6) that lock dog (4) rotates of stirring at the edge that rotates chamber (5).

2. automatic locking mechanism according to claim 1 is characterized in that: described lock dog (4) is an opposite side bent rectangular that concaves.

3. automatic locking mechanism according to claim 1 is characterized in that: described lock dog (4) is ellipse or rectangular.