JP2004183729A - Fitting structure of male member and female member, and female member used in fitting structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fitting structure which keeps the fitting force even when the fitting force is impaired by the attachment of lubrication accelerator and the water, and to provide a male member (male connector) and a female member (female connector) which are easily and efficiently manufactured to be used in the fitting structure. <P>SOLUTION: In this fitting structure wherein the male member (male connector) formed by a cylindrical projecting member, and an outer face part of the male member (male connector) are fitted into an inner cavity of a cylindrical member or a conduit pipe, the male member (male connector) is provided with a stepped part formed by a plurality of cylindrical parts of which diameters are gradually reduced toward a tip side, and a circular edge part of the tip side of the cylindrical part is joined to the inner cavity face of the cylindrical body or the conduit pipe. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a fitting structure between a male member (male connector) and a female member (female connector), and a female member (female connector) used for the fitting structure.
[0002]
[Prior art]
Conventionally, as a male member (male connector) and a female member (female connector) forming a fitting structure between a male member (male connector) and a female member (female connector), the outer surface as shown in FIG. As the formed male member (male connector) and female member (female connector), a tapered female member (female connector) having a smooth inner lumen shape is known. Since the joining surface between the member (male connector) and the female member (female connector) is in surface contact, if oil or the like adheres to the fitting portion, an oil film will intervene in the joining portion, so that slippage easily occurs. Become.
[0003]
In order to solve the above-mentioned problem, a male member (male connector) having a plurality of trapezoidal portions as shown in FIG. 2 is used instead of the male member (male connector) having a smooth tapered shape as shown in FIG. A connector having a bamboo-shaped step has been proposed. This connector is formed such that the shape connecting the protruding edges of the steps in the long axis direction has a smooth tapered shape (tapered shape) toward the front end portion in the long axis direction.
[0004]
The bamboo-shaped connector has the advantage that it is easy to insert into the lumen of a female member (female connector), and when force acts in the direction of removal, friction increases and it becomes difficult to remove. Have However, in order to form this bamboo-shaped connector, it is necessary to use a special (slide) structure such as splitting the mold, which increases labor and cost, and further limits the number of molds. There were problems such as a decrease in productivity.
[0005]
Further, in order to solve the above problem, a female member (female connector) having a circumferential rib formed on a lumen surface has been proposed instead of a female member (female connector) having a smooth tapered lumen. I have. However, the female member (female connector) in which the circumferential rib is formed on the inner surface of the cavity is not stable in dimensions due to the mold mechanism, and is fitted with the conventionally known bamboo-shaped male member (connector). In this case, each projection acts negatively, which may cause a leak.
[0006]
[Problems to be solved by the invention]
An object of the present invention is to provide a fitting structure that solves the above problems, particularly a fitting structure between a male member (male connector) and a female member (female connector). A mating structure that can maintain the mating force even when lowered by
(2) The variation in dimensions of the molded product used in the fitting structure is reduced, a stable fitting is obtained, and the shape of the outer surface of the male member (male connector) affects the fitting property. A female member (female connector) that can form a stable fitting structure with a male member (male connector) having various outer surface portions and a male member (male connector) having a bamboo-shaped or smooth tapered outer surface portion, for example. connector),
Is to provide.
[0007]
[Means for Solving the Problems]
The first aspect of the present invention is a fitting structure of a male member (male connector) and a female member (female connector), wherein the female member (female connector) is a hollow columnar member, and A fitting structure for a male member (male connector) and a female member (female connector), characterized in that the diameter of the lumen of the cylindrical member is reduced stepwise toward the distal end. By doing so, the above problem could be solved.
The male member (male connector) may be formed with an opening at the tip end side and an inner cavity formed in the entire columnar projecting member, and may have a hollow shape so that liquid or gas can flow.
[0008]
The second aspect of the present invention relates to the first fitting structure, wherein a gap between adjacent step-shaped steps of the female member (female connector) has a smooth tapered shape.
[0009]
A third aspect of the present invention is a hollow member that is a cylindrical body or a conduit whose diameter decreases stepwise as the shape of the lumen becomes closer to the distal end side, and a male member (male connector) is provided in the lumen. The present invention relates to a female member (female connector) capable of forming a fitted structure in which the fitting is performed.
[0010]
A fourth aspect of the present invention relates to the female member (female connector), wherein a smooth taper shape is formed between adjacent step-shaped steps in the female member (female connector).
[0011]
The female member (female connector) employed in the present invention has a smaller variation in the dimensions of the molded product itself as compared with a conventionally known female member (female connector) having a circumferential rib formed on the inner surface of a cavity. A stable fitting is obtained, and the shape of the outer surface of the male member (male connector) has little influence on the fitting property. For example, the conventionally known outer surface portion has a bamboo-shaped or tapered male member (male). Connector) can achieve a stable fitting structure.
[0012]
Further, the female member (female connector) employed in the fitting structure of the present invention has a diameter which becomes smaller as the outer surface portion proposed in the application (Japanese Patent Application No. 2002-65367) previously submitted by the present applicant becomes closer to the distal end. It is also possible to achieve a stable fitting structure with a male member (male connector) having a step formed from a plurality of columnar portions whose size is reduced.
[0013]
In the case of fitting a conventionally known male member (male connector) and a female member (female connector), particularly in the case of fitting a male member (male connector) and a female member (female connector) having a smooth tapered surface, a joining surface As a whole, a friction reducing layer is formed by the lubricity promoter. For example, when the lubricity promoting agent is oily, a friction reducing layer due to an oil film is formed on the entire joint surface, and the male member (male connector) and the female member (female connector) are easily removed. On the other hand, in the fitting structure of the present invention as described above, the stepped step formed in the inner cavity of the female member (female connector) is similar to the circumferential rib provided in the conventionally known inner cavity. In a fitting structure with a male member (male connector) having a smooth function and having a smooth tapered surface, it is possible to divide the spread of the friction reducing layer generated in the case of the fitting structure. As a result, when a conventionally known tapered male member (male connector) is fitted to the female member (female connector), the problem occurs when a slip promoting agent adheres to a joint portion. A remarkable decrease in the fitting force is suppressed, and a stable joining force can be maintained.
[0014]
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Hereinafter, the present invention will be described more specifically based on embodiments.
Embodiment 1
The female member (female connector) of the present embodiment has a cylindrical shape having stepped portions a, b, c, d such that the diameter decreases stepwise as the shape of the lumen becomes closer to the distal end side as shown in FIG. A hollow female member (female connector) 4 which is a body or a conduit.
The female member (female connector) of the present embodiment has a shape in which the diameter decreases stepwise toward the distal end side, so that there is no undercut portion, so that deformation during molding hardly occurs. As a result, the molding size is stabilized and the variation in the molded product size is reduced, so that a stable fitting structure with the male member (male connector) can be obtained.
[0015]
Embodiment 2
As shown in FIG. 4, the female member (female connector) of this embodiment has a smooth taper between the adjacent steps of the step-like portions a, b, c, and d in the female member (connector) 4 of the first embodiment. A female member (connector) 5 having a shape portion f. The female member (female connector) 5 has the same effect as the tapered surface of the female member (female connector) having a smoothly tapered portion f between the steps. When the female member (female connector) of the present embodiment is fitted with a known bamboo-shaped male member (connector) shown in FIG. 2, the a, b, c, and d portions of the female member and the bamboo-shaped protrusion The parts can be securely fitted to each other, and stable fitting can be obtained. In addition, since the step-like shape eliminates the undercut portion as in the first embodiment, deformation during molding is less likely to occur, the molding dimensions are stabilized, and the variation in the molded product dimensions is reduced, and the shape is stable. A fitting structure is obtained.
[0016]
Embodiment 3
The fitting structure 7 of this embodiment shown in FIG. 5 includes a male member (male) having a tapered outer surface shown in FIG. 1 inside the female member (female connector) 4 of the first embodiment shown in FIG. FIG. 3 is a diagram showing a fitting structure when a connector (1) is inserted.
In the fitting structure according to the present embodiment, the stair steps a, b, c, and d formed in the inner cavity of the female member (female connector) according to the first embodiment are formed by the stair step protrusions 1a, 1b, and 1b. A female member (female connector) partially joined to the male member (male connector) at 1c and 1d, and the stepped portions a, b, c, and d are provided with a conventionally known circumferential rib shape in the lumen. The same effect as the circumferential rib shape is obtained. Therefore, even when the lubricity promoter adheres to the joint surface of both connectors, the spread of the lubricity promoter over the entire joint surface can be suppressed, so that a remarkable decrease in the fitting force can be prevented. Further, as described above, the inner cavity of the female member (female connector) is formed in a step-like shape including the step-like portions a, b, c, and d, so that there is no undercut portion. Are less likely to occur, the molding dimensions are stabilized, and variations in the dimensions of the molded product are reduced, and a stable fitting structure is obtained.
[0017]
Embodiment 4
FIG. 6 relates to a male member (connector) 8 having a plurality of stepped columnar projecting members 8a to 8e, which was filed by the present applicant earlier (Japanese Patent Application No. 2002-65367). It can be used for:
The columnar projection member 8 is formed with a plurality of diameter-reduced cylinders whose diameters decrease toward the distal end, is tapered in the longitudinal direction, and has a passage through which a liquid or gas can pass. 10 are formed. The outer wall surface in the longitudinal direction of each reduced-diameter cylinder is substantially parallel to the axis of the male member (male connector). When the outer wall portion of the reduced-diameter cylinder is substantially parallel to the axis, it is easy to form, and is excellent in terms of retaining a fitting force and insertability.
[0018]
Further, the male member (male connector) preferably has a taper angle of 12.5 ± 3.0 / 100, which is assumed when connecting the tip side edges of adjacent reduced diameter cylinders. The step structure having such a taper angle allows easy insertion when inserting into a female member (female connector), and requires a predetermined pulling force when removing, so it can be easily detached due to an unexpected situation. Can be prevented. That is, when the stepped columnar projection of the male member (male connector) is a stepped columnar projection having a small step, when the lubricity promoter is attached to the joint surface of both connectors, the lubricity promoter is joined. Since it easily spreads over the entire surface, it has little effect in preventing the reduction of the frictional force. Conversely, if the step is too large, the joining area itself becomes small and it becomes easy to separate.
Further, the male member (male connector) 8 of the present embodiment is easier to mold than the bamboo shoot-shaped male member (male connector) as shown in FIG. 2, improving the productivity and reducing the manufacturing cost. it can. Although the male member (male connector) 8 of the present embodiment has the passage 1 formed therein, the male member (male connector) 8 does not have the passage 1 and may simply have a connector function.
[0019]
The male member (male connector) 8 is formed integrally with a distal end of a syringe (outer cylinder) 9 of a medical syringe. In the medical syringe on which the male member (male connector) 8 is formed, the male member (male connector) 8 is inserted into the female member (female connector) of the present invention, for example, the female member (female connector) of the first embodiment. Used by fitting. In addition, this fitting structure can exert not only various excellent effects by the female member (female connector) 4 as described in the first embodiment, but also the syringe as described above with the male member (male connector). Since the mold 8 is easy to mold, the syringe itself can be easily molded, the productivity is improved, and the manufacturing cost can be reduced.
[0020]
【The invention's effect】
The present invention relates to a fitting structure fitting of a male member (male connector) and a female member (female connector),
(1) It is possible to achieve a fitting structure capable of maintaining the fitting force even when the fitting force is reduced due to adhesion of a lubricity promoter or water,
(2) The variation in the dimensions of the molded product used in the fitting structure is reduced, a stable fitting structure can be realized, and the shape of the outer surface of the male member (male connector) affects the fitting property. For example, a female member (female connector) that forms a stable fitting structure with a male member (male connector) having a bamboo-shaped or tapered outer surface portion can be provided.
[Brief description of the drawings]
FIG. 1 is a view showing a known male member (connector) whose outer surface has a smooth tapered shape.
FIG. 2 is a view showing a known male member (connector) having a bamboo-shaped step portion formed on an outer surface portion.
FIG. 3 is a diagram showing a hollow female member (connector) whose diameter decreases stepwise as the shape of the lumen becomes closer to the distal end side.
FIG. 4 is a diagram showing a hollow female member (connector) having a smooth tapered portion between steps of the hollow female member (connector) of FIG. 3;
5 is a view showing a fitting structure in which a known male member (connector) whose outer surface portion shown in FIG. 1 has a smooth tapered shape is inserted into an inner cavity of the hollow female member (connector) of FIG. 3; .
FIG. 6 is a view showing a male member (male connector) having a plurality of columnar projecting members on the distal end side.
[Explanation of symbols]
a Stepped portion b Stepped portion c Stepped portion d Stepped portion 1a Edge 1b of stepped portion 1c Edge of stepped portion 1c Edge 1d of stepped portion Edge 5a of stepped portion 5a Stepped portion and taper Edge 5b of stepped portion and edge 5c of tapered portion 5d edge of stepped portion and tapered portion 8d Edge of stepped portion and tapered portion 8a Cylindrical projection member 8b Cylindrical projection member 8c Column-shaped projection member 8d Column-shaped projection member 8e Column-shaped projection member 8f Tip-side edge 8g of column-shaped projection member Tip-side edge 8h of column-shaped projection member Tip-side edge 8i of column-shaped projection member 8i Tip of column-shaped projection member Side edge 8j Tip side edge 8k of columnar projection member Base edge 8l of columnar projection member Base edge 8m of columnar projection member Base edge 8n of columnar projection member 8n Columnar projection Base end side edge 8e of columnar projection Male member of smooth tapered part 1 the outer surface portion is tapered between stair shaped stepped adjacent the proximal edge f (male connector)
2 Male member (male connector) whose outer surface has a bamboo shoot-shaped part
3 Bamboo shoot step 4 Female member (female connector)
5 Female member (female connector)
6 Lumen 7 Fitting structure 8 Male member (male connector)
9 Syringe of medical syringe (outer cylinder)
10 lumen

Claims (8)

A fitting structure of a male member (male connector) and a female member (female connector), wherein the female member (female connector) is a hollow cylindrical member, and the shape of the lumen of the hollow cylindrical member Characterized in that the diameter of the female member (female connector) and the male member (male connector) are reduced in a stepwise manner toward the tip. The fitting structure according to claim 1, wherein a space between adjacent step-shaped steps of the female member (female connector) has a smooth tapered shape. The fitting structure according to claim 1, wherein the outer surface of the male member (male connector) has a tapered shape whose diameter decreases toward the distal end. The fitting structure according to claim 1, wherein an outer surface of the male member (male connector) has a bamboo-shaped protrusion. The fitting according to claim 1 or 2, wherein the outer surface of the male member (male connector) has a step formed of a plurality of columnar portions whose diameter decreases toward the distal end. Joint structure. The male member (male connector) has an opening and a lumen formed on the distal end side, and has a hollow shape through which a liquid or gas can flow through the entire lumen. The fitting structure according to any of the above items. A fitting structure in which a male member (male connector) is inserted into the lumen, the hollow member being a cylindrical body or a conduit whose diameter decreases stepwise toward the distal end. A female member (female connector), characterized in that a female member can be formed. The female member (female connector) according to claim 7, wherein a smooth tapered shape is formed between adjacent step-shaped steps.

Images