KR101353900B1 - Pin for assembling and the assist handle having it - Google Patents

Abstract

The present invention relates to an interference fit pin and a vehicle assist handle using the same. According to an embodiment of the present invention, there is provided a handle portion having a first hinge hole and a connecting member having a second hinge hole positioned concentrically with the first hinge hole, wherein the first hinge hole and the second hinge hole are provided. It is coupled to the hinge hole to rotatably connect the handle portion and the connecting member, the body portion inserted into the first hinge hole and the second hinge hole, the outer diameter larger than the body at the rear end of the body portion And a serration portion that is forcibly fitted into the first hinge hole or the second hinge hole, wherein the body portion and the serration portion are integral with each other, and the assembly pin of the assist handle is injection molded with synthetic resin. to provide.

Description

Assist handle assembly pin and vehicle assist handle including the same {Pin for assembling and the assist handle having it}

The present invention relates to an interference fit pin and a vehicle assist handle using the same.

In general, the assist handle of the vehicle refers to a handle mounted inside the vehicle to provide convenience to the occupant.

The assist handle must be able to support the weight of the occupant and therefore must be firmly fixed to the frame of the vehicle. In addition, if the occupant does not use, it is preferable not to protrude from the inside of the vehicle. As such, the assist handle has a structure that is pulled out on an approximately flat surface so as to protrude into the handle only when the occupant is needed, or the handle body is rotated.

Looking at Patent Document 1, as shown in Figure 1, approximately 'c' shaped handle 100, both ends of the handle is rotatably coupled and the base 10, the handle ( It relates to an assist handle including a damper mounted to the connecting portion of the base 100 and the base 10 to rotate the handle elastically in one direction.

Connection of the handle 100 and the base 10 is made by a rotating shaft member 24 having a substantially cylindrical shape. Such a rotating shaft member requires a high rigidity because the weight of the occupant transmitted from the handle acts as a working load, and as the rotation center of the handle takes an operating load of the damper.

In the prior art, this rotating shaft member is made of metal. In particular, the cold-rolled carbon steel increases the rigidity, the surface is nickel-zinc plating treatment to prevent corrosion.

The rotating shaft member of the metal material according to the prior art is required to be plated after processing the metal base material, so a manufacturing time of about 3 days is required. In addition, environmentally harmful substances are generated during the plating process, which may cause environmental pollution.

Republic of Korea Patent Publication No. 10-2010-0020112 (2010.02.22) Republic of Korea Utility Model Registration No. 20-0259434 (December 20, 2001)

The present invention seeks to improve the hinge pin of the rotary assist handle to solve the above problems. The problem to be solved in the present invention will be more clearly understood during the description process of the invention.

In order to solve the above problems, the present invention is provided with a handle portion having a first hinge hole and a connection member having a second hinge hole positioned concentrically with the first hinge hole. A body part which is coupled to the hinge hole and the second hinge hole to rotatably connect the handle part and the connecting member, the body part inserted into the first hinge hole and the second hinge hole, and at the rear end of the body part. It has an outer diameter larger than a normal body portion, and includes a serration portion that is forcibly fitted into the first hinge hole or the second hinge hole, wherein the body portion and the serration portion are integrally formed and assisted by injection molding with synthetic resin. Provides a pin for assembly of the handle.

Furthermore, the material of the body portion and the serration portion may be polyphenylene sulfide (PPS).

In one embodiment, the serration part may include an extension body extending from the body part and a plurality of radially disposed on an outer circumferential surface of the extension body, and a fitting protrusion protruding in parallel with a length direction of the body part.

In another embodiment, the fitting protrusion is formed of each side of the left and right sides and the upper surface of each of the sides forming an inclined 135 degrees to 150 degrees with the outer surface of the extension body, the connection between the side and the upper surface Corners can be rounded.

In another embodiment, the opposing side surfaces of the fitting protrusions adjacent to each other may be extended to each other, and in another embodiment, the serration part may have a plurality of extension bodies extending from the body part and a plurality of lattice shapes from the extension body. The protruding part may include a protruding block in which a tip portion exposed along the insertion direction of the body part forms an acute angle.

These embodiments may additionally have at least one recessed slit groove parallel to the longitudinal direction in the body portion, or a tapered portion having a diameter gradually protruding from the end portion of the serration portion.

According to the embodiments of the present invention, by manufacturing the assembly pins made of synthetic resin it is possible to replace the pin of the metal material according to the prior art. This is more environmentally friendly, productivity is improved, and has the effect of increasing the economics.

Furthermore, the various serration parts are firmly fitted to the handle part and the connection member made of plastic, so that the separation of the assembly pins can be more reliably prevented.

The slit groove formed in the body portion increases the rigidity of the assembling pin to prevent breakage of the assembling pin during the assembling process or during use, and increases the resistance to torsion, thereby preventing the failure of the assist handle.

In addition, the effects of the additional invention will be clearly understood during the process of understanding the invention through the following detailed description of the invention and the accompanying drawings.

1 is a perspective view according to the prior art.
Figure 2 is a schematic perspective view of the assembly pin according to the first embodiment of the present invention.
3 is a cross-sectional view according to AA shown in FIG. 1.
Figure 4 is a perspective view showing the main part of the assembly pin according to the second embodiment of the present invention.
Fig. 5 is a sectional view showing a main part of the second embodiment.
6 is a sectional view showing a main part of the assembling pin according to the third embodiment of the present invention.
Figure 7 is a perspective view showing the main part of the assembly pin according to the fourth embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described the configuration, function and operation of the assist handle assembly pin and the assist handle of the vehicle including the same according to the present invention. However, the drawing numbers for the same or similar components shall be used in unison.

The assist handle according to the embodiment of the present invention includes an approximately 'c' shaped handle portion, a connecting member rotatably coupled to both ends of the handle portion, and an assembly pin for hinge coupling the connecting member and the handle portion.

The connecting member is fixed to the inner wall of the vehicle, and the method of fixing the connecting member to the inner wall of the vehicle is known according to the known bolts, clamps and the like.

The connection member may be provided with elastic means for elastically rotating the handle portion in any one direction. The elastic means may be a coil spring, the configuration of the connection member and the handle portion including the elastic means is the same as that shown in Figure 1, or similar to other known techniques.

First hinge holes are formed at both ends of the handle portion. In addition, the connecting member is formed with a second hinge hole concentric with the first hinge hole. By fitting the assembly pin through the first hinge hole and the second hinge hole, the handle portion can rotate with the assembly pin as the rotation axis.

2 and 3 show the assembly pin according to the first embodiment of the present invention.

The assembly pin 10 has a shape of an elongated cylindrical rod to be coupled to the first hinge hole of the handle portion which is concentrically aligned and the second hinge hole of the connection member.

The assembling pin 10 inserted into the first hinge hole and the second hinge hole is formed of the body portion 1, the serration portion 2, and the tapered portion 3 sequentially with reference to the drawings. Here, the tapered portion 3 can be omitted as a secondary configuration.

The body portion 1 is a cylindrical portion that is in contact with the inner circumferential surfaces of the first hinge hole and the second hinge hole to hinge-engage the handle portion and the connecting member, and the serration portion 2 is formed in the first hinge hole or the second hinge hole. It is a part for preventing the assembly pin 10 coupled to the handle portion and the connection member to be retracted to fall out. The maximum outer diameter of this serration part 2 is larger than the outer diameter of the body part 1.

One of the features of the present invention is that, unlike the prior art, the assembly pin 10 is manufactured by synthetic resin molding. Synthetic resin that can be used in the present embodiment may be selected from the hard one having a physical property equivalent or more improved than the pins of the metal used in the prior art. Specifically, one of the plastics suitable for manufacturing the assembly pin according to the embodiment of the present invention is polyphenylene sulfide (PPS). Furthermore, a small amount of glass fiber may be added to secure the rigidity of the synthetic resin.

The front end portion 11 of the body portion 1 is shaped to decrease in diameter toward the front end so as to be easily inserted into the first hinge hole and the second hinge hole.

The connection point 12 between the trunk of the body 1 and the inclined front end portion, which maintains a constant diameter along the longitudinal direction, is curved.

If the connection point between the inclined front end of the body part and the body part is connected without curved surface treatment, the angled connection point is caught around the first hinge hole or the second hinge hole and excessive force is applied to the insertion of the assembly pin. It may be required or the pin may be damaged. However, this concern is addressed by curving the connection points 12 as in the embodiment.

In addition, at least one slit groove 13 recessed in parallel with the longitudinal direction of the body portion 1 is formed on the outer circumferential surface of the body portion 1. One slit groove 13 is formed or two, three are formed radially on the outer peripheral surface of the body.

Slit grooves increase the rigidity of the body portion. In addition, the slit groove receives the torsion of the body portion made of synthetic resin to prevent breakage of the body portion. This slit groove can be omitted.

The serration portion 2 is formed extending to the rear end of the body portion (1). Specifically, the serration part 2 includes an extension body 21 extending from the body part 1 and a fitting protrusion 22 protruding radially from the outer circumferential surface of the extension body.

The diameter of the extension body 21 may be the same or somewhat larger than the diameter of the body portion (1). In addition, the diameter of the extension body 21 may be somewhat smaller than the body portion (1). In particular, when the diameter of the extension body 21 is formed smaller than the diameter of the body portion 1, it is possible to increase the height of the protrusion of the fitting protrusions to be described later. Such increase in size of the fitting protrusion facilitates mold design for reducing the manufacturing error of the fitting protrusion, and helps to reduce the manufacturing tolerance of the assembly pin.

The fitting protrusion 22 is a member that protrudes radially from the extension body 21 to make the maximum diameter of the serration portion 2 larger than the diameter of the body portion 1. That is, considering the imaginary circle connecting the top dead center of the fitting protrusion 22, this imaginary circle is larger than the outer diameter of the body part 1. As shown in FIG.

The fitting protrusion 22 protrudes in parallel with the longitudinal direction of the body portion 1. The number of fitting protrusions 22 can be variously changed.

Referring to FIG. 3 in which a cross section of the serration portion 2 is shown, the fitting protrusion 22 is substantially triangular in shape. The protruding end of the fitting protrusion 22 is formed to be angular, and the end is crushed while being forcibly inserted into the inner circumferential surface of the first hinge hole or the inner circumferential surface of the second hinge hole. In addition, the inner circumferential surface of the first hinge hole or the inner circumferential surface of the second hinge hole that is in contact with the fitting protrusion 22 is also crushed while being plastically deformed so as to be depressed by the fitting protrusion, thereby making the interference fit between the two.

Referring back to FIG. 2, the tapered portion 3, whose diameter gradually decreases, protrudes from the end portion of the serration portion 2. The tapered portion 3 is an exposed first hinge hole or second hinge hole (hereinafter referred to as an 'exposed hinge hole') after the assembly pin 10 is completely inserted into the first hinge hole or the second hinge hole. End caps (not shown) are coupled to the) to form a seat. That is, the closing cap may have a coupling portion fitted into the exposed hinge hole, and the taper portion is provided at the rear end of the assembly pin to provide room for insertion of the coupling portion into the exposed hinge hole. If the closing cap does not need to be coupled to the assist handle, or even if the closing cap is provided, the taper may be omitted if it does not engage the inner circumferential surface of the exposed hinge hole.

4 and 5 are views of the assembly pin according to the second embodiment of the present invention.

The assembly pin 10 according to the second embodiment includes a body portion, a serration portion 2 and a tapered portion 3. The assembling pin according to the second embodiment may have the technical features of the first embodiment without departing from the contents described below, and duplicate description thereof will be omitted.

In the second embodiment, the serration portion 2 includes an extension body 21 and fitting protrusions 22 protruding in an approximately trapezoidal cross-sectional shape from the extension body.

Referring to FIG. 5, the inclined side surfaces 221 of the left and right sides of the fitting protrusion 22 form an inclination angle C of 135 degrees to 150 degrees with the outer surface of the extension body 21. In addition, a flat upper surface 222 is formed at the upper ends of both sides, and the connecting edges of the upper surface 222 and the side surface 221 are rounded to form a curved surface 223.

As the fitting protrusion 22 according to the second embodiment forms a trapezoidal cross section, crushing due to contact with the inner circumferential surface of the hinge hole is made smaller than that of the angled form of the first embodiment. In addition, since the volume of the fitting protrusion 22 can be increased, the rigidity of the fitting protrusion is increased, and the fitting protrusion 22 has an advantage of being strongly pressed into the hinge hole. In particular, precise molding is possible by not forming an acute angle in the assembly pin manufactured by injection molding of synthetic resin, and thus, even coupling force can be expected by reducing the fitting height and height tolerance.

6 is a cross-sectional view of the assembling pin according to the third embodiment of the present invention.

The assembly pin according to the third embodiment includes a body portion, a serration portion 2 and a tapered portion. The assembly pin according to the third embodiment may have the technical features of the first embodiment and the second embodiment without departing from the contents described below, and redundant description thereof will be omitted.

The fitting protrusions 22 protrude from the extension body 21 and the side surfaces of the fitting protrusions 22 form a curved surface with the side surfaces of the adjacent fitting protrusions 22. Therefore, the outer circumferential surface of the serration portion 2 is formed as one continuous curved surface by the fitting protrusions 22 continuously connected.

This third embodiment has the advantage that the stress concentration formed on the surface of the serration portion is not concentrated at a specific point when the fitting protrusion is brought into contact with the inner circumferential surface of the hinge hole by the interference fitting so that the shape of the fitting protrusion is maintained as possible. Has That is, since the stiffness of the fitting protrusion is increased, the bonding force between the two is greatly improved while greatly plastic deformation of the inner circumferential surface of the hinge hole in contact with the serration portion.

7 is a diagram illustrating a serration unit according to a fourth embodiment of the present invention.

The assembly pin 10 according to the fourth embodiment includes a body portion 1, a serration portion 2, and a tapered portion 3. The assembly pin according to the fourth embodiment may have the technical features of the first to third embodiments as it is within the scope not in conflict with the contents described below, and duplicate descriptions are omitted.

In the fourth embodiment, the serration part 2 includes a plurality of protruding blocks 23 protruding in a lattice form from the extension body.

Protruding block 23 has a substantially rectangular or rhombus shape. The protruding block 23 protrudes outwardly more than the outer circumferential surface of the body portion 1, so that the maximum outer diameter of the serration portion 2 is larger than the outer diameter of the body portion 1.

In addition, in the protruding block 23, the tip portion 231 exposed along the insertion direction of the body portion 1 forms an acute angle. The direction indicated by the arrow in the figure is the direction in which the assembly pin 10 is inserted into the first and second hinge holes. The distal end portion 231 of the protruding block 23 formed at an acute angle allows the start portion of the serration portion 2 whose diameter starts to increase to be easily inserted into the first hinge hole or the second hinge hole. This lowers the initial pressing force required for insertion of the assembly pin, resulting in an increase in the productivity of the assist handle.

According to the present invention, by replacing the rotating shaft of the assist handle with the assembly pin of the synthetic resin material, compared to the conventional metal pin, the plating process can be omitted, the production of environmentally harmful substances is prevented. In addition, there is an economic advantage by using a synthetic resin that is cheaper than metal. Furthermore, by forming the assembling pin with a polyphenylene sulfide material, the tensile strength can be greatly increased than that of the metal. Since the assembly pin of the synthetic resin material according to the present invention takes only about half a time to manufacture, there is an advantage that the manufacturing period is shortened compared to the conventional technology using metal.

The fitting protrusion in the serration part is accompanied by plastic deformation that is somewhat crushed during the interference fitting due to the characteristics of the synthetic resin material. At the same time, the inner circumferential surface of the first hinge hole and the inner circumferential surface of the second hinge hole are also plastically deformed in accordance with the serration portion. Since the serration portion and the inner peripheral surface of the hinge hole in contact with each other is properly plastically deformed, the interference fit is made, thereby increasing the bonding force between the two.

When the diameter of the body of the assist handle is approximately 4 mm, the protrusion height of the fitting protrusion or the protruding block is only about 0.1 mm. Considering the manufacture of the embodiments according to the present invention by injection molding a synthetic resin it can be seen that the precise molding of the fitting protrusion or protruding block is not easy. However, various structural features of the serration part provided by the present invention can solve such technical difficulties, thereby allowing the replacement of conventional metal pins with synthetic pins.

10: pin
1: Body part
11 front end 12 connection point 13 slit groove
2: serration
21: extension body 22: fitting protrusion 221: side
222: upper surface 223: curved surface 23: protruding block 231: tip
3: tapered part

Claims (9)

A handle portion having a first hinge hole and a connecting member having a second hinge hole positioned concentrically with the first hinge hole, the handle being coupled to the first hinge hole and the second hinge hole, By rotatably connecting the part and the connecting member,
A body part inserted into the first hinge hole and the second hinge hole;
At the rear end of the body portion has a larger outer diameter than the body portion, and includes a serration portion forcibly fitted into the first hinge hole or the second hinge hole,
The body portion and the serration portion is integrally formed pins for the assembly of the assist handle that is injection molded with synthetic resin. In claim 1,
The body part and the serration part material is PPS (Polyphenylene sulfide, polyphenylene sulfide) of the assist handle assembly pin. In claim 1,
The serration part
An extension body extending from the body portion;
A plurality of radially arranged on the outer peripheral surface of the extension body, the assembly pin of the assist handle including a fitting protrusion protruding in parallel with the longitudinal direction of the body portion. 4. The method of claim 3,
The fitting protrusion
It is formed of each side of the left and right sides and the upper surface connecting each upper end of the side forming an inclination of 135 to 150 degrees with the outer surface of the extension body,
A connecting pin of the side and the upper surface is assembled pin of the assist handle is rounded. 4. The method of claim 3,
Opposite side of the adjacent fitting projection is an assembly pin of the assist handle is extended to extend to each other. In claim 1,
The serration part
An extension body extending from the body portion;
And a plurality of protrusions protruding from the extension body in a lattice shape and including protruding blocks having acute angles exposed along the insertion direction of the body part. 7. The method according to any one of claims 1 to 6,
Assembling pin of the assist handle is formed in the body portion parallel to the longitudinal direction and formed at least one recessed slit groove. 7. The method according to any one of claims 1 to 6,
Assembling pin of the assist handle protruding the tapered portion is gradually reduced in diameter at the end of the serration portion. A handle portion having first hinge holes formed at both ends thereof,
A connection member coupled to each end of the handle part and having a second hinge hole formed therein;
An assist handle comprising the assembling pin according to any one of claims 1 to 6, which is connected to the first hinge hole and the second hinge hole.

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