JPS6018140A - Floor sucking tool of electric cleaner - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a floor suction tool for a vacuum cleaner.

Conventional Structure and Problems Conventionally, in the floor suction tool of a vacuum cleaner, there have been roughly two methods for rotatably holding the rotary pipe that fits into and is connected to the extension pipe. One method is to remove the rotary pipe 2 from the suction tool main body 1, insert it together with the retaining ring 3, and match it with the connecting pipe 6, as shown in Fig. 1. To remove the tap, slip into the retaining ring grooves 4 and 6 and remove the retaining ring 3.
A method of holding the rotary pipe 2 rotatably by evenly hooking the rotary pipe 2.

Another method is to fit the rotary pipe 8 together with a retaining ring 9 on the outside of the suction joint 7 as shown in FIG. 2, and to hold the retaining ring 9 in grooves 10 and 10'.

However, according to the former method, a gap is likely to be formed between the connecting pipe 6, the suction tool main body 1, and the rotary pipe 2, and the suctioned dirt accumulates, making rotation uncertain. Also, it has no resistance to the flowing air, and □ generates wind noise, making it louder. In the latter case, if a soft material such as polypropylene is used to increase the durability of the rotary pipe 8 and at the same time provide an inexpensive floor suction device, the suction joint 7 of the floor suction device may If you pry the rotating pipe 8 in the direction, the rotating pipe 8 will extend in the vertical direction, the retaining ring 9 will no longer be caught in the retaining ring grooves 10 and 10' of the rotating pipe 8, and the rotating pipe 8 will come off and be ready for actual use. It had the disadvantage of being of no use.

OBJECTS OF THE INVENTION The present invention eliminates the above-mentioned conventional drawbacks and provides a floor suction tool for a vacuum cleaner that is highly usable.

Structure of the Invention The floor suction tool for a vacuum cleaner of the present invention includes a suction joint having a retaining groove in a cylindrical portion, and a retaining ring groove that fits on the outer periphery of the cylindrical portion of the suction joint and has a retaining ring groove on the inner surface. A rotating pipe having an upper part, a circular retaining ring having a partial notch, which simultaneously engages a retaining groove and a retaining ring groove to rotatably connect the suction joint and the rotary pipe, and a circular retaining ring having a partial notch. The intended purpose is achieved by providing a part of the retaining groove with a retaining protrusion that prevents the retaining ring from falling into the retaining groove.

Description of examples One embodiment will be described below with reference to FIGS. 3 to 7.

In the figure, reference numeral 11 denotes a suction device main body, which is rotatably attached so that a suction joint 12 can rotate within a certain range. 1
3 is a connecting pipe, which is formed so that the intake passage is smooth. 14 is a carpet sled, with an opening 15 in the center.
An intake passage 17 extends to the left and right of the opening 15. A brush 18 is provided parallel to the intake passage 17 and fixed to the carpet sled 14.

19 is the front rotating roller, 2o is the rear rotating roller,
The distance between the cleaning surface and the carpet sled 14 is maintained.

21 is a rotary pipe, which is formed to fit smoothly into the suction joint 12. A retaining ring groove 22 is integrally provided on the inner surface of the rotary pipe 21, and a retaining groove 23 is integrally provided in the cylindrical portion 12' of the suction joint 12. When the rotary pipe 21 is fitted into the suction joint 12, the retaining ring groove 22 and the retaining groove 23 face each other at the same position, creating a retaining space 24. Reference numeral 26 denotes a retaining ring, which has a circular cross section and an annular shape with a portion cut away. The width of the retaining ring groove 22 and the retaining groove 23 are slightly larger than the wire diameter of the retaining ring 26, and the depth of the retaining ring groove 22 is approximately the same as the wire diameter of the retaining ring 25. The depth of the retaining groove 23 is slightly larger than the wire diameter of the retaining ring 25. Also, the normal outermost diameter of the retaining ring 25 is slightly larger than the diameter of the retaining ring groove 22, and when the outermost diameter is made the smallest by applying force to shorten the notch, the retaining ring 25 The inner diameter is cut out so that it is smaller than the diameter of the retaining groove 23. Further, a projection 26 to prevent the suction joint 12 from being removed is provided directly above the groove 23 to prevent the suction joint 12 from being removed. The length of the retaining protrusion 26 is slightly smaller than the notch width created when the retaining ring 25 is wrapped around the retaining groove 23, and its height is approximately M (1/12) of the retaining ring 25. It is (very small). Further, the end portion of the pull-out stop protrusion 26 and the base C of the pull-out stop groove 23 are rounded and smoothly processed. For removal, the end of the retaining ring 25 may also be rounded.

In the above configuration, as shown in FIG.
2, a retaining ring 26 is wound around the retaining groove 23. At this time, the retaining projection 26 should be located between the notches of the retaining ring 25. Next, the rotary pipe 21 is fitted into the suction joint 12 with the tip of the bent portion 27 facing downward. When the positions of the retaining groove 23 and the retaining ring groove 22 coincide to form a retaining space 24, the retaining ring 25 elastically spreads outward and is inscribed in the retaining ring groove 22. The groove depth of the retaining ring groove 22 is approximately equal to the wire diameter of the retaining ring 26, so the retaining ring 25 is placed equally in both the retaining groove 23 and the retaining ring groove 22. It acts as a catch and prevents it from coming out.

Next, when the rotary pipe 21 is turned half a turn and the tip of the 9 part 27 is bent completely upward as in normal use, the retaining ring 26 expands outward and is inscribed in the retaining ring groove 22. Therefore, it rotates half a turn together with the rotary pipe 21, and the notch comes to the opposite side of the locking protrusion 260. At this time, even if a force is applied in the direction shown in FIG. 5 to pry the rotary pipe 21, the angle a forming the retaining ring groove 22 exerts a force pushing it up towards the retaining groove 23, but the retaining ring groove 22 is not pulled out. Since the protrusion 26 supports it, the retaining ring 25 does not move, and therefore the rotary pipe 21 does not come off from the suction joint 12. Therefore, soft but durable and inexpensive resin materials such as polypropylene can be used.Also, in the past, a rotary pipe was attached to the suction device body and used as a unit component, but in the example, it is assembled with the suction joint. They can be combined into unit parts, are not bulky, and can be easily assembled. Furthermore, compared to the conventional method of inserting and holding a rotary pipe as shown in Fig. 1, it does not make noise and does not interfere with reverse rotation due to intrusion of dirt. The end of the retaining protrusion 26 and the base of the retaining groove 23 are rounded and smoothed, so when the rotary pipe 21 is turned half a turn during assembly and when in use, the rotary pipe 21 is connected to the suction joint 12. When rotating against the pull-out retaining ring 25, the cutout end surface of the retaining ring 25 does not catch on the retaining protrusion 26, and the rotation can be performed smoothly.

Furthermore, the length of the retaining protrusion 26 is smaller than the width of the notch created when the retaining ring 25 is wrapped around the retaining groove 23, and even if the maximum length of the retaining protrusion 26 is the length of half the circumference of the retaining groove, the rotation This has the effect of preventing the pipe 21 from coming off, and the retaining ring 25 can be shortened when it comes off.

In the above embodiment, the innermost diameter of the retaining ring 25 is larger than the outer diameter of the retaining groove 23, but the innermost diameter of the retaining ring 25 may be smaller than the outer diameter of the retaining groove 23. In short, it is sufficient that the engagement of the retaining ring 25 with the retaining groove 23 and the retaining ring groove 22 is always performed by the retaining protrusion 2-6.

Effects of the Invention As described above, according to the present invention, by providing the pull-out prevention protrusion in the pull-out prevention groove of the suction joint, it is possible to provide a floor suction tool that is inexpensive, has excellent durability, and is highly usable. The effect is extremely large.

[Brief explanation of the drawing]

Figures 1 and 2 are cross-sectional views of different conventional examples, and Figure 3 is a cross-sectional view of a different conventional example.
The figure is a sectional view of a floor suction device according to an embodiment of the present invention.
The figure is a bottom view of the suction device for the same floor, Figure 5 is an enlarged sectional view of part A in Figure 3, Figure 6A is an enlarged perspective view of the suction joint, B is a partial sectional view thereof, and Figure 7 is the main part. FIG. 12... Suction joint, 21... Rotating pipe, 22... Retaining ring groove, 23...
Retaining groove, 26... Retaining ring, 26...
...Protrusion to stop removal. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 3 Figure 21 Figure 4 Figure 5

Claims (3)

[Claims] (1) A suction joint with a cylindrical part provided with a retaining groove, a rotary pipe that fits on the outer periphery of the cylindrical part of the suction joint and has a retaining ring groove on its inner surface, and The retaining ring is simultaneously engaged with the retaining ring groove to rotatably connect the suction joint and the rotary pipe, and the retaining ring is provided with a circular retaining ring having a partial notch. A vacuum cleaner floor suction tool with a protrusion to prevent the retaining ring from falling into the retaining groove. (2) The floor suction tool for a vacuum cleaner according to claim 1, wherein the end of the removal-prevention projection and the base of the removal-prevention groove are rounded. (3) The width of the removal stop protrusion is smaller than the width of the notch of the removal stop ring, and is set smaller than half the circumference of the removal stop groove. Suction tool.