CN201171654Y - Telescoping tube with automatic extension - Google Patents

Abstract

The utility model discloses a telescopic tube with automatic stretching function, belonging to the field of vacuum cleaners, comprising an outer tube and an inner tube, the inner tube is provided with a rack, the outer tube is equipped with a gear, and the gear is equipped with a coil spring. The two ends of the coil spring are respectively fixed on the gear and the outer tube. The inner tube is inserted from the head of the outer tube to make the rack mesh with the gear. The gear is provided with a boss. The outer tube is equipped with an operating component and a stop component. The operating component passes through The stop assembly is connected to the boss of the gear. In the utility model, a rack is arranged on the inner tube, and a gear with a coil spring is installed on the outer tube. When the stop assembly blocks the boss of the gear, the inner tube is still. It can be extended automatically under the applied force; when the inner tube is to be retracted, the inner tube can be held by hand and pushed into the outer tube to the retracted position. The extension of the inner tube can be realized and the extension distance can be controlled by the button on the handle, and the expansion and contraction can be realized conveniently.

Description

Telescoping tube with automatic extension

【Technical field】

The utility model relates to the field of vacuum cleaners, in particular to a telescopic tube with automatic extension function used in the vacuum cleaner.

【technical background】

In order to meet the needs of all kinds of people, the vacuum cleaner generally has a flexible pipe body. Present telescoping tube all is to cooperate by two hands when stretching, holds inner and outer tube respectively and carries out stretching. When the telescopic tube is telescopic, the hand originally held at the handle has to be loosened to hold the outer tube and press the release button, and the other hand holds the inner tube to pull it out. The operation of this telescopic structure is difficult and inconvenient.

【Content of invention】

The purpose of the utility model is to solve the problems existing in the prior art, and to propose a telescopic tube with automatic stretching function, which can realize telescopic expansion very conveniently.

In order to achieve the above purpose, the utility model patent proposes a telescopic tube with automatic extension function, which includes an outer tube and an inner tube. The inner tube has a rack, the outer tube is equipped with a gear, and the gear is equipped with a disc The two ends of the coil spring are respectively fixed on the gear and the outer tube. The inner tube is inserted from the head of the outer tube to make the rack mesh with the gear. The assembly is connected to the boss of the gear by a stop assembly.

Preferably, the stop assembly includes a stop bar and a first spring, the two ends of the first spring are respectively fixed on the outer tube and the stop bar, the other end of the stop bar bears against the boss, and the operation assembly It includes a button and a second spring, and the two ends of the second spring are respectively fixed on the outer tube and the button, and the rear end of the stop bar cooperates with the button through an inclined plane.

Preferably, the rack is a spur rack, the gear is a spur gear, and the spur gear is installed above the inner tube.

Preferably, the rack is a helical rack, the gear is a bevel gear, and the bevel gear is installed on the side of the inner tube.

Preferably, the tail of the outer tube is a handle, and the button is arranged near the handle.

Beneficial effects of the utility model patent: the utility model is provided with a rack on the inner tube, and a gear with a coil spring is installed on the outer tube. When standing, the inner tube can automatically extend under the force of the coil spring; when you want to shrink the inner tube, you can hold the inner tube with your hand and push it into the outer tube to the retracted position, or push the inner tube forward against the fixed object Return to the retracted position. The extension of the inner tube can be realized through the button on the handle and the extension distance can be controlled without releasing the hand that originally held the operating handle and without the cooperation of the other hand, so that expansion and contraction can be realized conveniently.

【Description of drawings】

Fig. 1 is the structural representation of embodiment one of the telescopic tube with automatic extension function of the utility model;

Fig. 2 is the P-P sectional view of Fig. 1;

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

Fig. 4 is the B-B sectional view of Fig. 2;

Fig. 5 is a schematic diagram of the cooperative structure of the boss and the stop bar in the first embodiment;

Fig. 6 is the structural representation of gear in embodiment one;

Fig. 7 is a structural schematic diagram of Embodiment 2 of the telescopic tube with automatic extension function of the present invention;

Fig. 8 is a P-P sectional view of Fig. 7 .

【Detailed ways】

Embodiment one:

Referring to Figures 1, 2, 3, 4, 5, 6, the telescopic tube with automatic extension function includes an outer tube 1 and an inner tube 2, the inner tube 2 has a rack, and the outer tube 1 is equipped with a gear 3. The coil spring 4 is installed inside the gear 3, and the two ends of the coil spring 4 are respectively fixed on the gear 3 and the outer tube 1, and the inner tube 2 is inserted from the head of the outer tube 1 to make the rack mesh with the gear 3, and the gear 3 is provided with Boss 11, an operating assembly and a stop assembly are mounted on the outer tube 1, and the operating assembly is connected to the boss 11 of the gear 3 through the stop assembly. The tail of the outer tube 1 is a handle, and the button 6 is arranged near the handle. The stop assembly includes a stop bar 5 and a first spring 7, the two ends of the first spring 7 are respectively fixed on the outer tube 1 and the stop bar 5, and the other end of the stop bar 5 bears against the boss 11, The operating assembly includes a button 6 and a second spring 8 , the two ends of the second spring 8 are respectively fixed on the outer tube 1 and the button 6 , and the rear end of the stop bar 5 cooperates with the button 6 through an inclined surface. The rack is a spur rack, the gear 3 is a spur gear, and the spur gear is installed above the inner tube 2 . The gear 3 and the coil spring 4 are loaded through the opening on the outer tube 1, and the opening is sealed by an outer cover 9, and the outer cover 9 is fixed on the outer tube 1 by screws 10.

After the coil spring 4 is installed in the gear 3, the gear 3 is pre-rolled in the natural state so that the coil spring 4 has a certain initial elastic force, and then the inner tube 2 is inserted from the head of the outer tube 1 to the retracted position and the inner tube The rack on the 2 meshes with the gear 3, driving the gear 3 to rotate counterclockwise. The positioning of the gear 3 is positioned by the cooperation of the stop bar 5 and the boss 11 on the gear 3 . In order to extend the inner tube, press the button 6, the button 6 and the slope of the stop bar 5 cooperate to make the stop bar 5 move backward and disengage from the boss 11, the gear 3 is driven by the coil spring 4 to rotate clockwise, and at the same time The inner tube 2 protrudes forward because the rack and the gear 3 are meshed. When the inner tube 2 stretches out to the required length, the button 6 is released. Reset under action, the stop bar 5 moves forward and withstands the boss 11 on the gear 3, and limits the rotation of the gear 3 so as to limit the inner tube 2 to protrude forward. When recovering the inner tube 2, the inner tube 2 can be held by hand and pushed to the retracted position in the outer tube 1, or the inner tube 2 can be pressed forward against the fixture and pushed back to the retracted position.

Embodiment two:

Referring to Figures 7 and 8, the rack is a helical rack, the gear 3 is a bevel gear, and the bevel gear is installed on the side of the inner tube 2.

In this embodiment, on the basis of the first embodiment, the spur gear is changed to a bevel gear, and the bevel gear 3 is installed on the side of the telescopic tube. The straight rack on the top of the inner tube 2 is changed into a helical rack whose side meshes with the bevel gear 3; a coil spring 4 is housed inside the bevel gear, and the functions and control methods of other parts are the same as those in the first embodiment. In this embodiment, the gear and the coil spring can be made relatively large, so that the extension of the inner tube is smoother.

The above-mentioned embodiment is an illustration of the utility model, not a limitation of the utility model, and any scheme after a simple transformation of the utility model belongs to the protection scope of the utility model.

Claims (5)

1. has the telescoping tube that stretches out function automatically, comprise outer tube and interior pipe, it is characterized in that: have tooth bar on the pipe in described, in the outer tube 1 gear is installed, disc spring is equipped with in gear inside, and the disc spring two ends are separately fixed on gear and the outer tube, interior pipe inserts from outer tube head and makes the rack and pinion engagement, gear is provided with boss, and operating assembly and stop assembly are installed on the outer tube, and operating assembly is connected to the boss of gear by stop assembly.

2. as claimed in claim 1 have a telescoping tube that stretches out function automatically, it is characterized in that: described stop assembly comprises the retaining strip and first spring, the two ends of described first spring are separately fixed on outer tube and the retaining strip, the other end of retaining strip withstands boss, described operating assembly comprises the button and second spring, the two ends of second spring are separately fixed on outer tube and the button, and the rear end of retaining strip cooperates with button by the inclined-plane.

3. as claimed in claim 1 or 2 have a telescoping tube that stretches out function automatically, and it is characterized in that: described tooth bar is a spur rack, and described gear is a spur gear, the top of pipe in spur gear is installed in.

4. as claimed in claim 1 or 2 have a telescoping tube that stretches out function automatically, and it is characterized in that: described tooth bar is a helical rack, and described gear is a bevel gear, the side of pipe in bevel gear is installed in.

5. as claimed in claim 2 have a telescoping tube that stretches out function automatically, and it is characterized in that: the afterbody of described outer tube is a handle, and button is arranged on armrest handle place.

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