JPH10292442A - External operating part connection structure of drain plug - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the connection of a drain plug by bendingly projecting a part of an annular member installed in the recessed groove around the inner periphery of a connected cylindrical part on the external operating part side toward the center of the cylindrical part by a small projection inside the recessed groove and pressure contacting a height difference part between a large diameter cylindrical part and a small diameter cylindrical part on the drain plug main body side. SOLUTION: A small projection is formed in a recessed groove 2-12 provided near the end part of the inner peripheral surface of a connected cylindrical part 2-1 located on the external operating part side at equal intervals. When an O-ring 5 is installed in the recessed groove 2-12 in the connected cylindrical part 2-1 on the operating part side for the connection, a portion at which the O-ring 5 rides on a small projection is projected in the direction of the center of the cylindrical part 2-1, and positioned nearer the position of the small diameter part than the large diameter part 1-11 of a connecting part on the drain plug side. On the other hand, when the large diameter part 1-11 on the drain plug side is brought in contact with the projected part of the O-ring 5 and pressed strongly against the operating part side, the O-ring is deformed, the large diameter part 1-11 on the drain plug side passes and is fitted to the inner diameter part of the operating part side, and the aground portion presses a height difference part 1-13 so as to fix the cylindrical part 2-1 on the operating part side and a connection part 1-1 on the drain plug side. Thus the mounting and dismounting of the connection part are facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for connecting an external operation part of a water drainage stopper for connecting an external operation part for remote operation or electric operation to a water drainage main body.

[0002]

2. Description of the Related Art Although the details of the connection structure of the external operation part of the water drainage plug are omitted, various devices such as Japanese Utility Model No. 7-12453 and Japanese Utility Model Application Laid-Open No. 5-42855 have been found, such as the reliability of connection holding and the ease of attachment and detachment. Can be FIG. 4 is a cross-sectional view of a main part showing an example of the joint portion. These joints provide elasticity to the joint cylindrical portion 4 on the side of the external operation portion 2 having the manual operation knob 3, and are provided with claw-like projections at the tip thereof to drain water. Fixing the step of the side joining cylindrical part 1,
A concave groove is provided in the vicinity of the end of the inner peripheral surface of the joining cylindrical portion on the external operation unit side 2, and a C-shaped retaining ring is fitted therein to fix and hold the step portion of the drain plug side joining cylindrical portion. Improvements have been made in terms of ease.

[0003]

However, in the conventional structure as described above, the joining cylindrical portion on the side of the external operation portion has a special shape, or it is necessary to manufacture a special C-shaped retaining ring as a coupling holding member. Each had a problem that led to an increase in production cost.

[0004]

According to the structure for connecting an external operating portion of a water drainage plug according to the present invention, the end of the outer peripheral surface of the joining cylindrical portion on the main body of the water draining plug is aligned with the inner peripheral surface of the joining cylindrical portion on the external operating portion side. It has a large-diameter cylindrical portion to be fitted and a small-diameter cylindrical portion connected to the large-diameter cylindrical portion, and a concave groove is formed in the circumferential direction near the end of the inner peripheral surface of the joining cylindrical portion on the external operation unit side. A small projection directed toward the center of a plurality of, preferably substantially evenly arranged, three cylindrical portions, wherein an annular elastic member is mounted in the concave groove, and a part of the annular elastic member is provided. Is curvedly projected toward the center of the cylindrical portion by a small projection in the groove, and the large-diameter cylindrical portion at the tip of the joining cylindrical portion on the drain plug main body side is fitted beyond the annular elastic member. The step portion between the portion and the small-diameter cylindrical portion is configured to be pressed against the annular elastic member.

[0005] In the above-described configuration, a structure for easily connecting and disconnecting the external operation portion of the water drainage plug can be realized by using a shape that is easy to manufacture and a general-purpose member.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of a main part of a joint showing an embodiment according to the present invention. Referring to FIGS. 2 and 3, the joint is fitted to the inner peripheral surface of a joint cylindrical part 2-1 on the operation part side. The large-diameter cylindrical portion 1-11 on the water drainage side is connected to the small-diameter cylindrical portion 1-1 connected thereto.
The annular side wall of the large-diameter cylindrical portion generated due to the difference in diameter at the boundary with 2 is inserted into a groove 2-12 provided near the end of the inner peripheral surface of the operating-portion-side joining cylindrical portion 2-1. The O-ring 5 is pressed and held. In this example, as shown in FIG. 3, three small projections 2-13 are formed in the groove 2-12 and are substantially equally arranged, and the small projections 2-13 form the inside of the groove 2-12. O-ring 5 is housed so as to protrude inward.

By forming a groove 2-12 having a substantially uniform depth and inserting an O-ring 5 therein, the large-diameter cylindrical portion 1 is formed.
It is conceivable to press and hold the step between the small cylindrical portion 1-12 and the small-diameter cylindrical portion 1-12. However, the O-ring 5 is attached to the inner peripheral surface 2-11 of the joining cylindrical portion 2-1 on the operation unit side. In a state where the large diameter cylindrical portion 1-11 on the drain plug side is fitted to the inner peripheral surface 2-11 of the joining cylindrical portion 2-1 on the operating portion side in a state where it protrudes evenly over the entire circumference. Since the resistance when climbing over the ring 5 is too large and the workability is poor, the present invention aims to provide a function of pressing the main step to only a part of the O-ring 5 in order to improve the workability. It is.

FIG. 2 is a sectional view of the operating portion side joining cylindrical portion 2-1. A concave groove 2-12 is provided in the vicinity of the inner peripheral end of the cylindrical portion 2-1 in the circumferential direction. 3 is a sectional view taken along the line AA 'of FIG. 3. As shown in FIG.
Three small projections 2-13 are provided so as to be substantially equally arranged toward the center of -1.

The outer diameter of the O-ring 5 is substantially equal to the outer diameter of the groove 2-12, and the cross-sectional diameter of the O-ring 5 rides on the small projection 2-13 when the O-ring 5 is mounted in the groove 2-12. Is set to a size that protrudes from the inner diameter of the inner peripheral surface 2-11 of the operating portion side joining cylindrical portion 2-1.

When the operation section side and the drain plug side are joined, O is inserted into the concave groove 2-12 of the operation section side joining cylindrical section 2-1.
When the ring 5 is attached, the portion where the O-ring 5 rides on the small protrusion 2-13 projects toward the center of the cylindrical portion 2-1 and is located at a position smaller in diameter than the large-diameter portion 1-11 of the drain plug side joint. However, the O-ring 5
When the O-ring 5 is pressed strongly against the operating portion side while being in contact with the protruding portion, the O-ring 5 is deformed to allow passage of the large-diameter portion 1-11 of the junction portion on the drain plug side, and as shown in FIG. The diameter portion 1-11 is fitted to the inner diameter portion 2-11 of the operating portion side joining cylindrical portion 2-1 and a step between the large diameter portion 1-11 and the small diameter portion 1-12 of the drain plug side joining cylindrical portion. The portion 1-13 is pressed by the portion of the O-ring 5 riding on the small projection 2-13, and the operating portion-side cylindrical portion 2-1 and the drain plug side joining portion 1-1 are fixed. When separating the operation unit side and the drain cock side, if the two are strongly separated, the large diameter part 1-11 of the drain cock side becomes an O-ring 5
Is separated over the protrusions.

In the example shown in FIGS. 3 and 2, the three small projections each form an arc shape. However, the number is not limited to three, and the shape may be trapezoidal, mountain-shaped, or any other shape.

The annular elastic member inserted into the concave groove is not limited to the above-mentioned O-ring 5 having a circular cross section, but may be deformed when the large-diameter cylindrical portion 1-11 on the drain plug side gets over in the joining operation. If so, the cross-sectional shape is arbitrary.

Further, although not particularly shown, with reference to FIGS. 2 and 3, the concave groove 2-12 of the joining cylindrical portion 2-1 on the operation section side.
By cutting off a portion of the side wall on the opening end side facing the small protrusion 2-13, a concave groove 2-1 is formed in manufacturing the joint cylindrical portion 2-1 formed as the housing on the operation portion side.
Also, the formation of the small projections 2-13 in the concave grooves can be facilitated.

[0014]

The connection structure for the external operation part of the water drainage plug according to the present invention has the effect of realizing a joint structure which is easy to manufacture and can be easily attached and detached by using general-purpose members.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main part of an example of an external operation unit connection structure of a water tap according to the present invention.

FIG. 2 is a cross-sectional view of a joining cylindrical portion on the operation unit side in the example of FIG.

FIG. 3 is a schematic cross-sectional view of the example of FIG.

FIG. 4 is a cross-sectional view of a main part showing a bonding portion of an example of the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drain stopper main body 1-1 Joining cylinder part on drain tap side 1-1 1 Large diameter cylinder part 1-12 Small diameter cylinder part 1-13 Step part 2 External operation mechanism part 2-1 Joint cylinder part on operation part side 2-11 Inner peripheral surface of joining cylindrical part 2-12 Groove 2-13 Small protrusion 3 Manual operation knob 4 Joining part 5 Annular elastic member (O-ring)

Claims (3)

[Claims] 1. A drain plug main body and an external operating part connected to the drain plug main body and an external operating part connection structure of a water drain plug joined by a cylindrical joint part, comprising: External operation unit connection structure. 1) The outer peripheral surface of the joining cylindrical portion on the drain plug main body side includes a large-diameter cylindrical portion whose end is fitted and fitted to the inner peripheral surface of the joining cylindrical portion of the external operation portion, and a small-diameter cylindrical portion connected to the large-diameter cylindrical portion. 2) The inner peripheral surface of the joining cylindrical portion on the side of the external operating portion has a circumferential groove formed near the end thereof, and the groove has a plurality of small protrusions provided in the center direction of the cylindrical portion. 3) An annular elastic member is mounted in the concave groove on the inner peripheral surface of the joining cylindrical portion on the side of the external operating portion, and a part of the annular elastic member is curvedly projected toward the center of the cylindrical portion by a small projection in the groove. 4) The large-diameter cylindrical portion at the distal end of the joining cylindrical portion on the drain plug main body side is fitted over the annular elastic member, and the step between the large-diameter cylindrical portion and the small-diameter cylindrical portion is pressed against the annular elastic member. ing 2. The external operating part of a water drainage stopper according to claim 1, wherein a wall on an opening end side of the cylindrical part of the concave groove on which a plurality of small projections are formed is cut off. Connection structure. 3. The external drain connection structure according to claim 1, wherein the plurality of small projections provided in the concave groove are constituted by three pieces which are arranged substantially evenly. .