JPH0442204Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to the structure of a pad attachment member for attaching a pad of a steering wheel.

Conventional technology Conventionally, in a steering wheel, a wheel ring and a boss part are connected by a plurality of spoke parts, a pad is attached to a pad attachment member that is integrally fixed to the boss part, and the pad is used to connect the boss part and the spoke part. I try to cover it. As shown in FIG. 8, the pad mounting member 20 includes a pad mounting member 22 having a locking recess 22a for locking a locking protrusion 21a on the back surface of the pad 21, and a boss on the back surface of the pad mounting member 22. The pad mounting member 22 is made of a hard synthetic resin (ABS resin,
The boss fixing portion 23 is made of a soft synthetic resin (polyurethane, etc.) to provide a good feel. This pad attachment member 20 is attached to the ninth and tenth pads.
As shown in the figure, the parting line (A-A
line) as the contact surface of the two molds 25 and 26.
5 and 26 in the left-right direction (the arrow 25a in FIG. 10 indicates the moving direction of the mold 25), a locking through hole 22c having a locking protrusion 22b on the inner surface is formed.
is molded into the pad attachment part 20, and when molding the boss part fixing part 23 after molding this pad attachment part 20, a tape 27 is attached to the inner end of the locking through hole 22c of the pad attachment part 20. The through hole 22c is closed to prevent the soft synthetic resin from entering the locking through hole during molding of the boss fixing portion 23, thereby forming the locking recess 22a.

Problems to be Solved by the Invention However, with the above structure, it is very complicated to paste tape on the inner end of each locking through hole when forming the boss fixing part, and the tape is partially attached. There was a problem that polyurethane etc. often entered the locking through hole due to peeling.

Therefore, an object of the present invention is to solve the above-mentioned problem, and it is not necessary to apply tape to each locking through hole when molding the boss fixing part, and the locking recess can be easily formed. An object of the present invention is to provide a pad attachment member.

Means for Solving the Problems In order to achieve the above object, the present invention provides a pad attachment part made of a hard synthetic resin to which a steering wheel pad is attached that covers the spoke part and the boss part; A lock comprising a boss fixing part integrally molded on the back surface and fixed to the boss part and made of a soft synthetic resin, and having a locking protrusion on the inner surface for locking the locking protrusion of the pad. The recessed portion is integrally formed on the surface of the pad attachment portion. The locking recess is constituted by a square frame having four side walls rising from the bottom surface, and the locking protrusions are provided at predetermined locations on the inner surface of the side walls. It has a square frame shape that protrudes inside the locking recess, and has a through hole in the one side wall that penetrates the one side wall with the shortest dimension from the locking protrusion of the locking recess to the bottom surface as the height dimension. It was configured as follows.

Effect of the invention When molding the locking recess of the pad attachment member with the upper mold and the lower mold, a core is inserted into the cavity for forming the locking recess between the upper mold and the lower mold, and the mold is locked in the cavity. At the same time as forming the locking recess, use the core to form a through hole in one side wall as a punch hole for the core, with the height dimension being the shortest dimension from the locking protrusion of the locking recess to the bottom surface. Meanwhile, the core and the lower mold form the bottom surface of the locking recess.

Embodiments Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

As shown in FIGS. 1 and 2, in the steering wheel according to this embodiment, a wheel ring 1 and a boss portion 3 are connected by two spoke portions 2, 2, and a pad 5 is attached to a pad mounting member 4. The upper surface of the boss portion 3 and the upper surfaces of the spoke portions 2, 2 are covered with the pad 5.

The pad 5 has a plurality of locking protrusions 5 on its back surface.
a,..., 5a, and each of the locking protrusions 5
A slit 5b is formed in the axial direction from the distal end surface of the locking projection 5a so that the locking protrusion 5c of each locking projection 5a can freely bend inward in the radial direction.

As shown in FIGS. 3, 4, and 5, the pad mounting member 4 is made of ABS with integrally molded locking recesses 6a for locking the locking protrusions 5a on the back surface of the pad.
A pad attachment part 6 made of resin or a hard synthetic resin such as polypropylene, and a boss made of a soft synthetic resin such as polyurethane that covers the peripheral edge of the boss plate 3a of the boss part 3 on the back side of the pad attachment part 6. It consists of a fixing part 7.

The pad attachment part 4 has a substantially rectangular plate shape, and after being fixed or temporarily fixed to the boss plate 3a, the soft synthetic resin is molded on the back surface, and the pair of engagement parts are attached to both ends of the surface. Recessed part 6
a, 6a. As shown in FIGS. 6 and 7, each of the locking recesses 6a is made of a rectangular box, and has a locking protrusion 6b on the entrance side edge of its inner surface.
Each locking protrusion 5a of the pad 5 is attached to the locking protrusion 6b.
The protrusion 5c is inserted into the locking recess 6a while being bent radially inward using the slit 5b,
The locking protrusion 5a is connected to the locking protrusion 6b of the locking recess 6a.
to attach the pad 5 to the pad attachment member 4. Further, the locking recess 6a has a through hole 6c formed in one side wall thereof, the height of which is the shortest dimension from the locking protrusion 6b to the bottom surface 6d. There will be 12 holes.

When the boss fixing part 7 is made of polyurethane, it is in a liquid state until it is injected into a mold, and after being filled into the mold, it foams by reaction and becomes an elastic body.

Note that 8 is a movable contact piece of the horn, and 9 is a fixed contact piece that comes into contact with the movable contact piece 8 of the horn.

The pad attachment member 4 having the above structure is molded as follows. That is, first, the pad attachment part 6 having a total of four locking recesses 6a, . . . , 6a is molded from a hard synthetic resin. At this time, each locking recess 6a constitutes a cavity that forms a side wall 6e between the upper die 10 and the lower side 11, and the core 12 is inserted into the cavity, as shown in FIGS. The bottom surface 6 is formed between the core 12 and the lower mold 11.
d, and a through hole 6c as a hole for the core 12 to form a locking recess 6a. After forming the locking recess 6a, a boss fixing part 7 covering the peripheral edge of the boss plate 3a is integrally molded from a soft synthetic resin on the back surface of the pad attachment part.

The above steering wheel has boss plate 3
After forming a boss portion 3 by integrally fixing a boss 3b to a, the wheel ring 1 and the boss portion 3 are connected by a pair of spoke portions 2, 2,
After attaching the movable contact piece 8, fixed contact piece 9, etc. to the pad attachment member 4 that is integral with the boss plate 3a, insert and engage each locking protrusion 5a of the pad 5 into each locking recess 6a of the pad attachment member 4. Stop, Pad5
Attach it to the pad attachment member 6.

According to the above embodiment, when the pad mounting member 4 is molded from hard synthetic resin, each of the locking recesses 6 is already formed.
Since the bottom surface 6d of a is formed and the locking recess 6a is reliably molded, there is no need to apply tape or the like, and resin molding can be easily performed.

Note that the present invention is not limited to the above-mentioned embodiments, and can be implemented in various other ways. For example, the shapes of the locking protrusion 5a of the pad 5 and the locking recess 6a of the pad attachment member 6 may be any shape.

Effects of the invention According to the above configuration, since the through hole has a height dimension that is the shortest dimension from the locking protrusion to the bottom surface in one side wall of the locking recess of the pad attachment part, the through hole can be used to remove the core. It can be used as a hole, and when molding the locking recess with the upper mold and the lower mold, the bottom surface can be reliably molded with the core and the lower mold. Therefore, when molding the boss fixing part from soft synthetic resin after molding the pad attachment member from hard synthetic resin,
The locking recessed portion having the bottom surface is reliably molded, there is no need to paste tape at all, and resin molding can be easily performed. Furthermore, in the conventional method, the locking recess could not be reliably formed due to peeling of the tape, etc., but the present invention can completely eliminate such problems. In addition, since the height of the through hole is the shortest dimension from the locking protrusion to the bottom surface, if you use this through hole as a core punching hole and mold the locking recess with the upper and lower molds. , it is possible to form a locking recess having a locking protrusion on the inner surface of each side wall without performing roughness removal. In addition, since the locking recess is composed of four side walls, the locking protrusion formed on the inner surface is a continuous square frame shape, which is more rigid than a discontinuous one with a notch. It can be done.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view taken along the - line in Fig. 2 of a steering wheel according to an embodiment of the present invention, Fig. 2 is a front view of the steering wheel with the pad removed, and Fig. 3 is a right side view of the pad mounting member. Half front view, Figure 4 is a sectional view taken along the - line in Figure 2, Figure 5
The figure is a bottom view of the pad attachment member, Figure 6 is an enlarged perspective view of the locking recess of the pad attachment member, Figure 7 is an explanatory view showing the molded state of the locking recess, and Figure 8 is of a conventional steering wheel. FIG. 9 is a cross-sectional view corresponding to FIG. 1, FIG. 9 is a perspective view of a locking recess of a conventional pad attachment member, and FIG. 10 is an explanatory view showing a molded state of the locking recess. 1...wheel ring, 2...spoke part, 3
... Boss part, 3a ... Boss plate, 3b ... Boss, 4 ... Pad mounting member, 5 ... Pad, 5a
... Locking projection, 5b ... Locking projection, 6 ... Pad mounting member, 6a ... Locking recess, 6b ... Locking projection, 6c ... Through hole, 6d ... Bottom surface, 6e ... Side wall, 7...Boss part fixing part, 8...Movable contact piece, 9
... fixed contact piece, 10 ... upper mold, 11 ... lower mold,
12... Core, 20... Pad mounting member, 21...
... Pad, 21a ... Locking protrusion, 22 ... Pad attachment part, 22a ... Locking recess, 22b ... Locking protrusion, 23 ... Boss part fixing part, 24 ... Boss plate, 25, 26 ... ...type, 27...tape.

Claims (1)

[Claims for Utility Model Registration] A pad attachment part 6 made of hard synthetic resin for attaching the steering wheel pad 5 that covers the spoke part 2 and the boss part 3, and a pad attachment part 6 integrally molded on the back surface of the pad attachment part 6. A locking concave portion is configured of a boss portion fixing portion 7 which is fixed to the boss portion 3 and is made of a soft synthetic resin, and has a locking protrusion 6b on the inner surface for locking the locking protrusion 5a of the pad 5. 6a is integrally formed on the surface of the pad mounting portion 6 for a steering wheel, wherein the locking recess 6a is constituted by a square frame having four side walls 6e rising from the bottom surface 6d. At the same time, the locking protrusion 6b is provided at a predetermined location on the inner surface of the side wall 6e, and the locking protrusion protrudes inward in the locking recess in a square frame shape, and the locking recess is provided on the one side wall. A pad mounting member for a steering wheel, characterized in that it has a through hole 6c penetrating the one side wall, with the shortest dimension from the locking protrusion 6b of the pad 6a to the bottom surface 6d being the height dimension.