JP3219547B2 - Parts fastening mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a component fastening mechanism for fixing two members with tapping screws.

[0002]

2. Description of the Related Art Conventionally, this type of fastening mechanism has
It is configured as shown in FIG. One member (110) has a screw insertion hole (111) into which a tapping screw (710) fits in a marginal state, and the other member (410) has a fastening hole (411).
Has been established respectively. In order to connect the two members (110) and (410), a tapping screw (710) is inserted from the screw insertion hole (111) side and cut into the fastening hole (411).

[0003]

In the conventional component fastening mechanism, the tapping screw (710) cuts into the fastening hole (411) and penetrates the screw insertion hole (111) in a state where there is room. I have. Therefore, when the coupling between the tapping screw (710) and the fastening hole (411) is loosened to separate the two members (110) and (410), the tapping screw (710) is moved to the member (110 ), It may fall off or be lost, and there is a problem that the workability of disassembling and assembling parts in maintenance and the like is poor. The present invention provides a component fastening mechanism that can prevent the tapping screw (710) from coming off one member (110) even when the tapping screw (710) is loosened.

[0004]

Means for Solving the Problems Of the two members (110) and (410) to be fastened by the tapping screw (710), the member
(110) has a screw insertion hole (111), and the member (410) has a fastening hole (411). The inner surface of the screw insertion hole (111) is covered with a synthetic resin layer (311a), and the tapping screw (7
10) bites into the synthetic resin layer (311a) and the fastening hole (411),
Both members (110) and (410) are connected.

[0005]

[Operation and effect] The tapping screw (710) is formed not only in the fastening hole (411) of the member (410) on the screw tightening side but also in the screw insertion hole (111) of the member (110) on the loosening side. Resin layer (311
a). Therefore, when the tapping screw (710) is loosened to separate the two members (110) and (410), even if the tapping screw (710) comes off the member (410) on the tightening side, the member on the screw loosening side ( The synthetic resin layer (311a) of the member (410) does not fall from the member (110). That is, 2
When separating the two members (110) and (410)
(710) is not dropped or lost, and workability is improved.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. In the present embodiment, of the two members to be fastened, one member is a support base (110a) of a mechanism portion used for a video tape recorder or the like, and the other member is a cradle (410a) of a cabinet (210). It is. As shown in FIG. 1, a mechanism (211) for performing magnetic recording and reproduction is attached to one side of a cabinet (210) of the video tape recorder, and an IC (21) is mounted on the side of the mechanism (211).
A circuit section (212) for processing a signal from the mechanism section (211) by 3) or the like is provided. The mechanism section (211)
Various components are mounted on the support base (110a). Cassette (600) with built-in magnetic tape (601)
Is loaded into the support base (110a), the magnetic tape (601) is moved into the cassette by the pair of leading guide blocks (804).
(600) and wound around a rotary cylinder (800) provided on a support base (110a). In this state, the magnetic tape (601) is conveyed by sandwiching the magnetic tape (601) between the rotating shaft (502) of the capstan motor (500) and the pinch roller (503), and the magnetic tape (601) is moved along the rotating cylinder (800). Recording and reproduction are performed by running the vehicle.

The support base (110a) has four corners of a cabinet.
(210). FIG. 2 shows the supporting base (110a)
Is a partial cross-sectional view of a state where it is attached to the cabinet (210). Support base (110a), cabinet (210)
Is placed on the cradle (410a) projecting upward from
In 10a), a fastening hole (411) having an open upper surface is formed. On the other hand, a screw insertion hole (111) is formed in the support base (110a), and the support base (110a) is attached to the receiving base so that the screw insertion hole (111) and the fastening hole (411) are coaxial. (410a). A fitting piece (310) made of synthetic resin is attached to the inner peripheral edge of the screw insertion hole (111), and a short cylinder (311) provided at the center of the fitting piece (310) has a screw insertion hole ( 111), that is, the screw insertion hole (111) is
a) is coated. As shown in FIGS. 3 and 4, the fitting piece (310) has two leg pieces (313) tightly fitted in the small holes (112) of the chassis (100) and lower ends of the leg pieces (313). Projecting retaining pieces (312) are integrally provided. The retaining piece (312)
The fitting piece (310), the leg piece (313) and the retaining piece (312) are in contact with the surface of the chassis (100), and are provided integrally with the chassis (100) by outsert molding. To attach the support base (110a) to the receiving base (410a), place the supporting base (110a) on the receiving base (410a), and fit the center of the screw insertion hole (111) and the fastening hole.
Align the center of (411). Thereafter, as shown in FIG. 3, a tapping screw (710) having a mountain diameter slightly larger than the inner diameter of the short cylinder (311) and the fastening hole (411) is tightened from above the short cylinder (311). Tapping screw (710) is short tube (311)
While threading the inner wall of the. Since the short cylinder (311) is made of a synthetic resin, a small rotational propulsion force is required when the tapping screw (710) is screwed. The tapping screw (710) penetrating the short cylinder (311) bites into the fastening hole (411), and the head of the tapping screw (710) comes into contact with the fitting piece (310) to receive the support base (110a). The fastening of the platform (410a) is completed. That is, the tapping screw (710) has a short cylinder (311) and a fastening hole (411).
The support base (110a) is screwed into both
(410a). When the tapping screw (710) is loosened and the support base (110a) is detached from the receiving base (410a), even if the engagement between the tapping screw (710) and the receiving base (410a) is released, the tapping screw (710) is removed. Is screwed into the fitting piece (310). That is, the tapping screw (710) is
a) When the video tape recorder is repaired or repaired, the support base (110a) must be
The workability when re-attaching after removing from (210) is improved.

The description of the above embodiments is for the purpose of illustrating the present invention, and should not be construed as limiting the invention described in the claims or reducing the scope thereof. Further, the configuration of each part of the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made within the technical scope described in the claims. Particularly, in this embodiment, the mounting of the support base (110a) of the video tape recorder has been described.
The technical idea of the present invention can be applied to the mounting of other parts.

[Brief description of the drawings]

FIG. 1 is a plan view showing a state where a mechanism unit and a circuit unit are attached to a cabinet.

FIG. 2 is a partial cross-sectional view of the component fastening mechanism of the embodiment.

FIG. 3 is a partial sectional view before the tapping screw is screwed.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a partial sectional view of a conventional component fastening mechanism.

[Description of reference numerals] (110a) Support base (310) Fitting piece (311) Short cylinder (410a) Cradle (710) Tapping screw

──────────────────────────────────────────────────続 き Continuing on the front page (72) Akihiro Suzuki 2-18-18 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Takahiro Okue 2-18 Keihanhondori, Moriguchi-shi, Osaka No. Sanyo Electric Co., Ltd. (56) References JP-A-52-74754 (JP, A) JP-A-52-113163 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F16B 5/00-5/12

Claims (1)

(57) [Claims] 1. A screw for tapping two members (110) and (410).
In the component fastening mechanism fixed at (710), the screw insertion hole (111) of the screw loosening side member (110) of the tapping screw (710)
On the inner surface, a synthetic resin layer (311a) is coated, and the tapping screw (710) is cut into the fastening hole (411) of the synthetic resin layer (311a) and the other member (410). Parts fastening mechanism.