CN2803126Y

CN2803126Y - Back regulator of chair

Info

Publication number: CN2803126Y
Application number: CN 200520059947
Authority: CN
Inventors: 夏福明
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-06-10
Filing date: 2005-06-10
Publication date: 2006-08-09
Anticipated expiration: 2015-06-10

Abstract

The utility model relates to a chair backrest regulator which comprises an outer shell, an inner shell, a buckling claw and a buckling claw sheet, wherein one end of the inner shell is provided with a ratchet wheel, and the ratchet wheel, the buckling claw sheet and the buckling claw are arranged in two clamping plates at one end of the outer shell. The ratchet wheel, the buckling claw sheet and the outer shell are connected together through a pin shaft, and the buckling claw sheet is of a cam structure and is provided with a big arc-shaped convexity and a small convexity. One side of the inner shell is provided with a convex block which is positioned at the outer side of the arc-shaped convexity of the buckling claw sheet, and the other side of the inner shell and the edge of the connecting point of the ratchet is provided with flanges. One end of the buckling claw is positioned by a positioning pin and is provided with a torsional spring, and the other end is provided with two to three teeth. Under the normal state, teeth of the buckling claw and ratchets on the ratchet wheel are engaged and are clamped in the concave position between two convexities of the buckling claw sheet. The utility model has the advantages of convenient operation, less occupied space and high product intensity and is not easy to damage in the process of use.

Description

Arm-chair backrest adjuster

Technical field

The utility model relates to a kind of arm-chair backrest adjuster.

Background technology

Present arm-chair backrest adjuster all needs to be provided with a regulating handle at the side of arm-chair, needing to pull the joint handle with hand when regulating backrest angle pulls backrest simultaneously and carries out, it is not too convenient to operate, regulating handle exposes and protrudes from outside the arm-chair in addition, not attractive in appearance, especially be located at influence very much on this class arm-chair of sofa attractive in appearance.

Summary of the invention

The purpose of this utility model is to provide a kind of handle that need not only need pull the arm-chair backrest adjuster that backrest can carry out angular adjustment at the problems referred to above of existing arm-chair backrest adjuster existence.

The purpose of this utility model is achieved in that the utility model comprises a shell, an inner casing, a button pawl and a button calvus, one end of described inner casing is a ratchet, ratchet, button calvus and button pawl are loaded in two clamping plate of shell one end, ratchet, button calvus and shell link together by bearing pin, the button calvus is a cam structure, be provided with a big arc convex and a small embossment, side at inner casing is provided with the outside that projection is positioned at the arc convex of button calvus, the edge of the opposite side of inner casing and ratchet joint is a flange, one end of described button pawl is by the alignment pin location and be provided with torsion spring, the other end is provided with 2-3 tooth, under normal condition the button pawl tooth be meshed with ratchet on the ratchet and be stuck in the recess between two projectioies of detaining calvus.

Adjuster of the present utility model is installed on the side of arm-chair, wherein shell and seat support are fixed together, inner casing and backrest are fixed together, inner casing and backrest interlock, pulling backrest during adjusting earlier makes inner casing rotate towards the direction rotation less with the shell angle around bearing pin forward, when going to certain angle, the arc convex that projection on the inner casing can promote to detain on the calvus rotates, arc convex will make button pawl jack-up its break away from ratchet on ratchet, this moment, inner casing and backrest were in free state, then backrest is pulled the maximum angle that the angle of promptly pulling between backrest and seat support reaches setting in the opposite direction backwards, this moment, the flange small embossment that will promote the button calvus of inner casing one side turned round the button calvus, at this moment detaining pawl is being meshed with ratchet on the ratchet again under the effect of torsion spring restoring force and is being stuck between two projectioies of button calvus, under this state because the button calvus and the button pawl the non-return effect, inner casing can be toward the unidirectional progressive motion of previous crops, can pull backrest towards doing unidirectional progressive motion, thereby regulate the angle of backrest.

Technique effect of the present utility model is:

1, the utility model only need be pulled the angle that backrest can be regulated backrest, and operation is very easy.

2, adjuster of the present utility model is close to the side of arm-chair, does not have the handle of protrusion, and occupation space is few than prior art, do not influence the outward appearance of arm-chair product, especially this class arm-chair of sofa wraps in adjuster of the present utility model in the overcoat of sofa, can't see adjuster from the outside.

3, the button pawl in the utility model adopts two or three teeth, makes the intensity height of product, and is in use not fragile.

The utility model is described in further detail below in conjunction with drawings and Examples.

Description of drawings

Fig. 1 is the structural representation of embodiment when normal operating condition.

Fig. 2 is the front view of shell among the embodiment.

Fig. 3 is the front view of inner casing among the embodiment.

Fig. 4 is the front view of button pawl among the embodiment.

Fig. 5 is the front view of button calvus among the embodiment.

Fig. 6 is embodiment detains calvus jack-up button pawl in adjustment process a schematic diagram.

Fig. 7 is the schematic diagram that embodiment inner casing in adjustment process is in free state.

Fig. 8 is the schematic diagram of embodiment inner casing in adjustment process when being in maximum opening angle.

The specific embodiment

Referring to Fig. 1 to Fig. 5, present embodiment is by a shell 4, an inner casing 1, a button pawl 2, a button calvus 6 and a torsion spring 3 are formed, described shell 4 is formed by connecting the seat support sleeve pipe of using 402 and two clamping plate 401 that are fixed on these sleeve pipe 402 1 ends, described inner casing 1 is formed by connecting backrest sleeve pipe of using 101 and the ratchet 103 that is fixed in these sleeve pipe 101 1 ends, described button calvus 6 is a cam structure, be provided with a big arc convex 602 and a small embossment 601, between big arc convex 602 and small embossment 601, constitute a recess, the ratchet 103 of inner casing 1, button calvus 6 and button pawl 2 are loaded within two clamping plate 401 of shell 4, ratchet 103, button calvus 6 and shell 4 link together by bearing pin 5, ratchet 103, button calvus 6 can rotate around bearing pin 5, side at inner casing 1 is provided with the outside that projection 104 is positioned at the arc convex 602 of button calvus 6, at the opposite side sleeve pipe 101 of inner casing 1 and the edge of ratchet 103 joints is flange 102, one end of button pawl 2 is by the alignment pin location and be provided with torsion spring 3, the other end of button pawl 2 is provided with two teeth, and two teeth of button pawl 2 are meshed with the ratchet on the ratchet 103 and are stuck in the recess between two projectioies of detaining calvus 6.

The adjuster of present embodiment is installed on the side of arm-chair, and wherein the sleeve pipe 402 of shell 4 is fixed together with seat support, and the sleeve pipe 101 and the backrest of inner casing 1 are fixed together, inner casing 1 and backrest interlock.The process of backrest being regulated by present embodiment is as follows:

1, pulling backrest earlier makes inner casing 1 rotate promptly towards the direction rotation less with shell 4 angles around bearing pin 5 forward, when going to certain angle, the arc convex 602 that projection 104 on the inner casing 1 promotes on the button calvus 6 rotates, arc convex 602 makes button pawls 2 jack-up it leave the recess on the button calvus 6 and break away from and get in touch with ratchet on the ratchet 103, become state as shown in Figure 6, inner casing 1 and backrest are in free state in this state, can freely rotate in certain interval.

2, backrest is pulled in the opposite direction promptly pulled the maximum angle that reaches setting until the opening angle of backrest backwards then, being set at backrest in the present embodiment changes into parallel with seat support, the small embossment 601 that the flange 102 of inner casing 1 one sides will promote button calvus 6 when reaching maximum angle soon makes the revolution of button calvus 6, arc convex 602 on the button calvus 6 no longer withstands button pawl 2, button pawl 2 is between two projectioies that are stuck in button calvus 6 under the restoring force of torsion spring 3 again, and be meshed with the ratchet on the ratchet 103, as shown in Figure 8.Because detain the non-return effect of calvus 6 and button pawl 2, inner casing 1 can be pulled backrest towards the unidirectional progressive motion of previous crops toward the unidirectional progressive motion of previous crops under this state, thus the angle that can regulate backrest forward step by step.

If when wanting to regulate the angle of backrest backwards, the process above repeating gets final product.

Claims

1. arm-chair backrest adjuster, it is characterized in that: comprise a shell, an inner casing, a button pawl and a button calvus, one end of described inner casing is a ratchet, ratchet, button calvus and button pawl are loaded in two clamping plate of shell one end, ratchet, button calvus and shell link together by bearing pin, the button calvus is a cam structure, be provided with a big arc convex and a small embossment, side at inner casing is provided with the outside that projection is positioned at the arc convex of button calvus, the edge of the opposite side of inner casing and ratchet joint is a flange, one end of described button pawl is by alignment pin location and be provided with torsion spring, and the other end is provided with 2-3 tooth, under normal condition the button pawl tooth be meshed with ratchet on the ratchet and be stuck in the recess between two projectioies of detaining calvus.

2. arm-chair backrest adjuster according to claim 1 is characterized in that: described button pawl tooth be two.