JPH0747084Y2 - Connection structure for tubular members of vacuum cleaner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a connecting structure for tubular members of an electric vacuum cleaner.

(Prior Art) Conventionally, for example, Japanese Utility Model Laid-Open No. 165945/1987 discloses a connecting structure for tubular members such as extension pipes of electric vacuum cleaners.

In such a connecting structure, a protrusion extending in the axial direction is provided on the outer peripheral surface of the tip end of one extension pipe, and a fitting recess for fitting the protrusion is provided on the rear inner peripheral surface of the other extension pipe. The front end of the extension tube is inserted into the rear part of the other extension tube, and the projection of the tip end is fitted into the fitting recess of the rear part to connect one extension tube to the other extension tube.

The projections and the fitting recesses are for positioning, and the male connection terminals and the female connection terminals for supplying power to the motor provided in the suction port body are provided at the front end portion and the rear end portion of the extension tube. The male connection terminal and the female connection terminal are reliably connected when one extension pipe and the other extension pipe are connected.

(Problems to be solved by the invention) However, in the case of such an extension pipe connection structure, it is necessary to tightly fit the fitting recess and the protrusion in consideration of the sealing property and rattling between the extension pipes when they are connected. If the fitting is tight, the projection and the fitting recess extend in the axial direction, so a large force is required when connecting the extension pipe, and the operability of connecting and disconnecting is extremely poor. There was a problem of becoming.

The present invention focuses on such a problem and improves operability when connecting and disconnecting a tubular member of an electric vacuum cleaner,
Moreover, it is intended to improve the sealing property of the connection end portion and prevent the connection portion from sticking.

(Means for Solving the Problems) In order to solve the above problems, a tubular member connecting structure of an electric vacuum cleaner according to the present invention is inserted into an end portion of one tubular member and inside an end portion of the other tubular member. A small-diameter portion that can be held is provided in a stepped manner, an engaging projection is provided on the outer peripheral surface of the small-diameter portion, and a notch into which the engaging projection is inserted at the end of the other tubular member, and a notch facing the inside of the notch. And a hook button having a hook portion that can be engaged and disengaged with the engaging projection, and the small diameter portion of the one tubular member is inserted into the end portion of the other tubular member to engage the engagement. In a connecting structure for a tubular member of an electric vacuum cleaner, which connects the tubular members by engaging the hook portion with a protrusion, an annular contact formed on an axial surface of a step portion of the one tubular member. Surface and an end surface portion of the other tubular member that abuts on the abutting surface To form an annular protrusion extending along the circumferential direction of the tubular member, said annular protrusion on the other, characterized in that the bored a fitting recess fitted in the axial direction.

(Operation) According to the tubular member connecting structure of the electric vacuum cleaner of the present invention, when the small diameter portion of one tubular member is inserted into the end portion of the other tubular member, the annular convex portion and the fitting concave portion are fitted to each other. One tubular member and the other tubular member are connected. Then, on either one of the annular contact surface formed on the axial surface of the step portion of the one tubular member and the end surface portion of the other tubular member that abuts on this contact surface, the circumference of the tubular member is Since an annular convex portion extending along the direction is formed and a fitting concave portion is formed on the other side, the annular convex portion is fitted in the axial direction, that is, the annular convex portion and the fitting concave portion are formed in the axial direction. Since it does not extend to one end, a small force is required when inserting and disconnecting the small diameter part of one tubular member into the end of the other tubular member, and the operability of connecting and disconnecting is good. . Moreover, since the annular convex portion and the fitting concave portion are formed along the circumferential direction,
The fitting improves the sealing property of the connecting portion between the one tubular member and the other tubular member and prevents rattling of the connecting portion.

(Example) Hereinafter, a connecting structure of tubular members of an electric vacuum cleaner according to an example of the present invention will be described with reference to the drawings.

Reference numeral 1 is an electric vacuum cleaner, and 2 is an extension tube as one tubular member. The extension tube 2 is connected to a hand-side operation portion 3 as the other tubular member.

At the end of the extension pipe 2, a small diameter portion 4 to be inserted into the hand-side operation portion 3 is provided in a stepped manner. That is, the stepped portion 8 is formed on the outer peripheral surface of the end portion with the extension tube, and the tip end is the small diameter portion 4. An annular contact surface 8A is formed on the axial end surface of the stepped portion 8.
Are formed.

The hand-side operation portion 3 is provided with an inserted end portion 5 into which the small diameter portion 4 of the extension tube 2 is inserted. Covers 6 and 7 are provided on the outer surfaces of the extension tube 2 and the hand-side operation section 3, respectively.

The small-diameter portion 4 of the extension tube 2 is inserted into the inserted end portion 5 of the hand-side operating portion 3, and the axial end surface portion of the inserted end portion 5 of the hand-side operating portion 3 is inserted.
When 5B is brought into contact with the contact surface 8A of the step portion 8 of the extension tube 2, the end portions 6a, 7a of the cover portions 6, 7 come into contact with each other. The covers 6 and 7 cover a part of the outer peripheral surfaces of the extension tube 2 and the hand-side operation section 3. On the outer peripheral surface of the small-diameter portion 4, an engagement protrusion 9 is provided so as to project toward the front side in the insertion direction.

Further, a cutout 10 for inserting the engaging projection 9 is formed in the inserted end portion 5 of the hand operation portion 3. A hook button 11 is provided behind the notch 10 in the inserted end portion 5.
A hook portion 12 that engages with the engagement protrusion 9 is formed at one end of the hook button 11, and a spring is provided at the other end of the hook button 11.
An operation projection 14 is formed which is biased upward by 13.

The cover 7 has a hole for allowing the operation protrusion 14 to move up and down.
15 are open. The hook button 11 has an inserted end 5
A rotary shaft 11a provided on the shaft allows the rotary shaft 11a to rotate.

An annular convex portion 16 extending in the circumferential direction of the extension tube 2 is formed on the contact surface 8A of the step portion 8 at the base of the small diameter portion 4. In addition, a fitting concave portion 17 into which the annular convex portion 16 is fitted is formed on the end surface 5B of the inserted end portion 5.
Are formed. The fitting concave portion 17 is formed in the circumferential direction of the inserted end portion 5 of the hand operation portion 3. Cover parts 6, 7
Also on each of the end faces, an arcuate convex portion 19 and a fitting concave portion 20 into which the arcuate convex portion 19 is fitted are formed.

Then, the small-diameter portion 4 of the extension pipe 2 is inserted into the inserted end portion 5 of the hand operation portion 3, and the axial end surface portion 5B of the insertion end portion 5 of the hand operation portion 3 is inserted into the step portion 8 of the extension pipe 2. When the extension tube 2 is connected to the hand operation portion 3 by abutting against the contact surface 8A, the annular convex portion 16 and the fitting concave portion 17 are fitted together, and further the circular arc convex portion 19 and the fitting concave portion 20 are fitted together. To do.

The annular convex portion 16 is formed in the circumferential direction of the extension tube 2, that is, along the annular contact surface 8A, and the fitting concave portion 17 is formed in the axial end surface portion 5B of the inserted end portion 5, so that The fitting improves the sealing property of the connection portion between the extension tube 2 and the hand operation portion 3, and eliminates rattling at the connection portion between the extension tube 2 and the hand operation portion 3.

Then, the hook portion 12 of the hook button 11 is engaged with the engagement protrusion 9 of the small diameter portion 4 to fix the connection.

By the way, an annular convex portion 16 extending along the circumferential direction of the extension tube 2 is formed on the annular contact surface 8A formed on the axial surface of the step portion 8 of the extension tube 2, and the contact surface 8A is abutted against the annular convex portion 16. Hand operation part 3 to touch
In the axial end surface portion 5B of the inserted end portion 5, a fitting concave portion 17 into which the annular convex portion 16 is fitted in the axial direction is bored, that is, the tubular convex portion 16 and the fitting concave portion 17 are axial. Since it does not extend in the direction, a small force is required when inserting and connecting the small diameter portion 4 of the extension tube 2 into the inserted portion 5 and connecting / disconnecting it.
The operability of removal is good.

Reference numeral 21 is a boss for fixing the cover, and 22 is a bolt for fixing the cover. Incidentally, in this embodiment, the annular convex portion is provided on the extension pipe 2 side.
16 is provided, and the fitting recess 17 is formed on the hand operation portion 3 side,
It goes without saying that an annular convex portion may be provided on the hand operation portion 3 side and a fitting concave portion may be provided on the step portion 8 of the extension tube 2.

(Effects of the Invention) As described above, the connection structure of the tubular member of the electric vacuum cleaner according to the present invention has an annular contact surface formed on the axial surface of the step portion of one tubular member and this contact surface. An annular convex portion extending along the circumferential direction of the tubular member is formed on any one of the end surface portions of the other tubular member that abuts the surface, and the annular convex portion is axially fitted to the other end. Since the fitting recess is drilled,
When the small diameter portion of one tubular member is inserted into the end portion of the other tubular member and one tubular member is connected to the other tubular member, the annular convex portion and the fitting concave portion are fitted together. Then, on either one of the annular contact surface formed on the axial surface of the step portion of the one tubular member and the end surface portion of the other tubular member that abuts on this contact surface, the circumference of the tubular member is Since an annular convex portion extending along the direction is formed and a fitting concave portion is formed on the other side, the annular convex portion is fitted in the axial direction, that is, the annular convex portion and the fitting concave portion are formed in the axial direction. Since it does not extend to one end, a small force is required when inserting and disconnecting the small diameter part of one tubular member into the end of the other tubular member, and the operability of connecting and disconnecting is good. . In addition, since the annular convex portion and the fitting concave portion are formed along the circumferential direction, the fitting improves the sealing property of the connecting portion between the one tubular member and the other tubular member, and the rattling of the connecting portion occurs. Is also prevented.

This prevents dust from appearing at the connection between the tubular members and noise from the connection, and prevents glitches at the connection when the vacuum cleaner is used. Further, it is possible to improve quietness and a feeling of use when using the vacuum cleaner.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a connection structure between an extension tube and a hand operation part of an electric vacuum cleaner according to an embodiment of the present invention, and FIG. 2 is a schematic explanatory view of the electric vacuum cleaner according to the present invention. DESCRIPTION OF SYMBOLS 1 ... Vacuum cleaner, 2 ... Extension tube (tubular member), 3 ... Hand operation part (tubular member), 4 ... Small diameter part, 6, 7 ... Cover part, 8
... step, 16 ... annular convex, 17 ... fitting concave, 19 ... annular convex,
20 ... Fitting recess, 5B ... Axial end face, 8A ... Abutting face

Claims (1)

[Scope of utility model registration request] 1. A small-diameter portion that can be inserted and held in the inner surface of the end of the other tubular member is provided at the end of one tubular member, and an engaging projection is provided on the outer peripheral surface of the small-diameter portion so as to project. A notch for inserting the engaging projection and a hook button having a hook portion that is biased toward the notch and is detachable from the engaging projection are provided at the end of the other tubular member. A tubular member connection structure for an electric vacuum cleaner in which a small-diameter portion of one tubular member is inserted into an end portion of the other tubular member, and the hook portion is engaged with the engaging projection to connect both tubular members. In one of the annular contact surface formed on the axial surface of the step portion of the one tubular member and the end surface portion of the other tubular member that abuts this abutting surface, the tubular member To form an annular convex portion that extends along the circumferential direction, and the annular convex portion is fitted on the other side in the axial direction. A connecting structure for a tubular member of an electric vacuum cleaner, characterized in that a fitting recess formed therein is bored.