CN2925234Y

CN2925234Y - Guide buffer

Info

Publication number: CN2925234Y
Application number: CN 200620054544
Authority: CN
Inventors: 李绍汉
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-01-27
Filing date: 2006-01-27
Publication date: 2007-07-25
Anticipated expiration: 2016-01-27

Abstract

A guide rail buffering device in the technical field of furniture is provided, which comprises a cylinder, a rear cover, a spring, a piston rod, an O-shaped ring and a top cover. The rear cover is positioned at the rear section of the cylinder; the rear end of the piston rod is positioned inside the cylinder; the top cover is positioned at the front section of the piston rod; the utility model is also composed of a front piston component, a rear piston component and a rear Y-shaped ring; the front piston component is positioned at the rear end of the piston rod; the rear piston component connects to the front piston component to form a piston; the O-shaped ring and the Y-shape ring are bushed to the joint section of the front and rear piston components; the spring is propped between the rear piston component and the rear cover. When the drawer is pushed back from the pulling out status, the fast moving drawers pushes the stopper to drive the piston rod and piston to move backwards, then a negative pressure is formed in the front cavity and a positive pressure is formed in the rear cavity to produce a resistance towards external force, thus slowing down the movement of the drawer. The utility model can be best applicable to the guide rail of drawer.

Description

The guide rail buffer

Technical field

The utility model belongs to field of furniture, especially a kind of buffer that uses on drawer guideway.

Background technology

The end of drawer guideway commonly used partly has an inclined-plane that has a down dip, when drawer was soon closed, the inclined-plane can make drawer quicken tight close under the effect of gravity, but simultaneously can be with the sound once of " bat ", if the user often tries hard to recommend the drawer closure greatly, also can produce such noise.And this drawer grown service time, and closed effect also can be worse and worse.Also have some drawers to have the spring closing device in addition, elongate spring when pulling out drawer simultaneously, in closed drawer, it is closed to trigger the acceleration of spring contraction pulling drawer, and drawer panel and cupboard produce the noise of bigger " bat ".Owing to there is spring force in action, so the closing speed of drawer becomes faster, if user's hand is also contacting the drawer edge, having little time probably to draw back one's hand is just clipped to by drawer and injured.Some people has the custom of trying hard to recommend the drawer closure greatly, sends very big noise when often making drawer closed.

The buffer that a kind of pneumatic type is arranged, when drawer is closed, utilize the rubber ring compressed air in the piston, thereby reach the effect of buffering, structure as disclosed a kind of air-cylinder type guide rail buffer among the patent CN2640321Y (September 15 2004 Granted publication day), it is by overcoat, movable post, spring, the piston cushion rubber, end cap is formed, movable post is installed in the overcoat, the end cap lid on the coat, spring is installed between the overcoat interior movable post and end cap, one end of movable post has boss and draw-in groove that the piston cushion rubber is installed, the soft rubber shock absorber part is installed on the other end of movable post, baffle ring is arranged at the other end of overcoat.But this pneumatic type buffer equally can compressed air when pulling out drawer, causes when pulling out drawer resistance bigger, and is inconvenient uses in, and use a period of time situation about leaking air easily afterwards, and reliability is relatively poor.

Summary of the invention

The purpose of this utility model provides a kind of device that can cushion the drawer closure, and the noise when it can eliminate the drawer closure well moves up to tight close drawer lentamente.

The utility model comprises cylinder, bonnet, spring, piston rod, O type circle and top cover, and bonnet is fixed on the rear portion of cylinder, and the rear end of piston rod places in the cylinder, and top cover is fixed on the front end of piston rod; It also has secondary piston assembly, back piston assembly and back Y shape circle, the secondary piston assembly is fixed on the rear end of piston rod, back piston assembly and secondary piston assembly are connected to each other forms a piston, O type circle is enclosed within the position that the back piston assembly is connected with the secondary piston assembly side by side with back Y shape circle, and the spring roof pressure is between back piston assembly and bonnet.

According to preferred forms of the present utility model, Y shape circle and guide pin bushing before it also comprises, preceding Y shape circle and guide pin bushing penetrate piston rod successively and stretch out the outer position of cylinder, and the front portion of cylinder stretches out and is shaped on tubular cavity, preceding Y shape circle is pressed on the cylinder port, and guide pin bushing is stuck in the tubular cavity.And it also has the cork head, and the front portion of top cover is shaped on consent, and the cork screw plug is gone into the consent of top cover.

Operation principle of the present utility model is: back piston assembly and secondary piston assembly are connected to each other forms a piston together, it is separated into ante-chamber and back cavity to cylinder, spring is arranged in the back cavity, after drawer draws back, because the mounting means difference of forward and backward Y-shaped ring, non-resistance produces in this moment cylinder, and spring makes the front portion that piston is pushed cylinder to piston rod fully protruding automatically, at this moment the volume minimum of ante-chamber and the volume maximum of back cavity.Cylinder is fixed on the appropriate location of drawer retaining rail by cylinder block, when drawer when the state of pulling out back promotes, the tongue piece that is installed on the movable rail of drawer is run into the cork head, the tongue piece of fast moving is pushing away the cork head and is moving together with piston rod, piston backward, Y-shaped ring and piston form negative pressure at ante-chamber like this, back Y-shaped ring and bonnet form malleation at back cavity, produce the damping of opposing external force, the motion that slows down drawer.

The utility model is simple in structure, and is easy to use, can cushion the closure of drawer, eliminated the noise that produces when drawer is closed, also more safe and reliable in the use.

Description of drawings

Below in conjunction with accompanying drawing the utility model is further described:

Fig. 1 is the structure chart of the utility model embodiment;

Fig. 2 is the decomposition installation diagram of embodiment;

Fig. 3 is the schematic diagram of embodiment;

Fig. 4 is the schematic diagram that embodiment installs on drawer guideway.

The specific embodiment

Referring to Fig. 1～Fig. 3, cylinder 1 is elongated, cylindrical, makes with duroplasts.Bonnet 2 is the bottle cap shape, makes with duroplasts, and the internal diameter size of its waist sizes and cylinder 1 is tight fit, and by the rear portion of ultrasonic technology fusion at cylinder 1.Secondary piston assembly 4, back piston assembly 5 are made with duroplasts equally, both rely on the concaveconvex structure of mutual correspondence closely to fasten becomes a complete piston, wherein secondary piston assembly 4 is shaped on axis hole along the axis, and axis hole is interference fit with the piston rod 6 that inserts wherein; The groove that a ring-type is arranged in the stage casing of piston, be placed with the O type circle 8 and the back Y shape circle 9 of rubber system in the groove, they rely on the inwall of elasticity swelling at cylinder, play the effect of sealing, especially back Y shape circle 9 has unidirectional sealing characteristics, when piston moved backward, back Y shape circle 9 fully opened closely to contact with piston with cylinder 1 inwall and makes airtight effect better.The front portion of cylinder 1 stretches out and is shaped on tubular cavity 13, and there are two annular positions the front portion that tubular cavity 13 inner close fittings cylinder 1, and Y shape circle 7 and guide pin bushing 10 are so that seal piston rod 6 and this position before these two annular positions embed respectively.The one-way sealing characteristic of Y shape circle 7 before utilizing, when piston was moved backward, preceding Y-shaped ring 7 fully opened under the rubbing action of piston rod 6, closely contacted with piston rod 6, formed negative pressure, and the vacuum of ante-chamber is higher, and damping is better.Top cover 11 also is to make with duroplasts, is shaped on axis hole along the axis, and axis hole is interference fit with the piston rod 6 that inserts wherein, and its front portion is shaped on consent; Cork head 12 usefulness silicon rubber are made, and its front end is dome shape, and its rear end is cylindrical, and cork head 12 is filled in the consent of top cover 11, can reduce noise, weaken the impact of drawer to top cover 11.

Referring to Fig. 3 and Fig. 4, the guide rail buffer that assembles is by plastic cylinder block 14 supportings, and cylinder block 14 usefulness snap fit are on the retaining rail of drawer guideway; Cylinder block 14 has the installation position 15 of two bridge opening shapes, and the guide rail buffer inserts two bridge openings from a side, and utilizes the flange 16 that is shaped on tubular cavity 13 peripheries to block the bridge opening.The installation site of cylinder block 14 should make the axis of piston rod 6 parallel with the direction of motion of drawer guideway, and makes the tongue piece 17 on the movable rail of drawer aim at cork head 12.

The utility model is fit to use on all drawer guideways.

Claims

1. guide rail buffer, it comprises cylinder (1), bonnet (2), spring (3), piston rod (6), O type circle (8) and top cover (11), bonnet (2) is fixed on the rear portion of cylinder (1), the rear end of piston rod (6) places in the cylinder (1), top cover (11) is fixed on the front end of piston rod (6), it is characterized in that: it also comprises secondary piston assembly (4), back piston assembly (5) and back Y shape circle (9), secondary piston assembly (4) is fixed on the rear end of piston rod (6), back piston assembly (5) is connected to each other with secondary piston assembly (4) forms a piston, O type circle (8) is enclosed within the position that back piston assembly (5) is connected with secondary piston assembly (4) side by side with back Y shape circle (9), and spring (3) roof pressure is between back piston assembly (5) and bonnet (2).

2. guide rail buffer according to claim 1, it is characterized in that: Y shape circle (7) and guide pin bushing (10) before it also comprises, preceding Y shape circle (7) and guide pin bushing (10) penetrate piston rod (6) successively and stretch out the outer position of cylinder (1), the front portion of cylinder (1) stretches out and is shaped on tubular cavity (13), preceding Y shape circle (7) is pressed on cylinder (1) mouth, and guide pin bushing (10) is stuck in the tubular cavity (13).

3. guide rail buffer according to claim 1 is characterized in that: it also comprises cork head (12), and the front portion of top cover (11) is shaped on consent, and cork head (12) is filled in the consent of top cover (11).