JP2841010B2 - How to attach movable members - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a movable member, for example, V
The present invention relates to a method for mounting a tension arm in a TR (video tape recorder).

[0002]

2. Description of the Related Art Generally, in a VTR, a large number of movable members such as a tension arm and a reel base brake lever are mounted on a frame. In VTR,
A large number of non-movable members, for example, bearings of the tension arm and columns of a printed circuit board are fixed to a frame made of sheet metal. On the other hand, a so-called outsert molding, in which a plurality of non-movable members are integrally molded with a plastic such as polyacetal (POM) on a frame made of sheet metal, is known. Many of the non-movable members in the VTR are formed by outsert molding and fixed to the frame. With respect to such a non-movable member, it is necessary to first form the movable member itself in a separate process, and attach the movable member to a receiving portion provided on the frame so as to be movable.

[0003]

Therefore, when attaching the movable member, a step of molding the movable member itself and a step of rotatably attaching the movable member to the receiving portion provided on the frame are required. Required, and this mounting step is required for each movable member. For this reason, many steps were required to attach the movable member. The present invention has been made in view of the above, and it is an object of the present invention to provide a method of attaching a movable member that can attach the movable member in fewer steps.

[0004]

According to the present invention, there is provided a method for mounting a movable member, comprising the steps of: providing a plate with a circular hole penetrating the plate; A plurality of concave portions are provided over a predetermined angle range centered on the hole, the main portion of the rotating body is provided on the other surface of the plate material, the shaft portion is provided in the round hole, and the one side is provided. On the surface, avoiding the concave portion, radially larger than the shaft portion, and a size that can be fitted in the concave portion, and outsert molding a retaining portion of an angle range sufficiently smaller than the predetermined angle, Thereafter, the rotating body is rotated so that the retaining portion fits into the concave portion, whereby the rotating body is rotatably attached to the plate member. .

[0005] The plate is provided with a long hole penetrating the plate, and a concave portion having a predetermined length on one side of the plate along the longitudinal direction of the long hole. The main portion of the sliding body is provided on the other surface of the plate member, a penetrating portion is provided on a very small portion of the elongated hole, and the elongate hole is provided on the one surface without the concave portion. Outsert molding a retaining portion that is large in a direction orthogonal to the longitudinal direction and that is large enough to fit in the concave portion and that is sufficiently smaller than the predetermined length. The sliding member is slid so that the sliding member is fitted to the plate member, whereby the sliding member is slidably attached to the plate member.

[0006]

According to the method of mounting the movable member having the above-described structure, the shaft of the rotating body formed outsert on the plate is
By this molding, it shrinks and becomes slightly thinner than the round hole.
Also, due to this contraction, the plate is sandwiched between the main portion and the retaining portion, and the rotation of the rotating body with respect to this plate becomes heavy. In this outsert molded state, the rotating body is forcibly rotated to fit the retaining portion into the recess.
Thereby, the sandwiching of the plate by the main portion and the retaining portion is loosened, and the rotation of the rotating body with respect to the plate is reduced. Also,
In the case of the sliding body as well, the penetrating portion of the outsert molded sliding body becomes thinner due to the shrinkage, but since the plate material is sandwiched between the main portion and the retaining portion, the sliding body slides against the plate material. Becomes heavy. In this outsert molded state, the sliding body is forcibly slid and the retaining portion is fitted into the concave portion. Thereby, the sandwiching of the plate by the main portion and the retaining portion is loosened, and the sliding of the sliding body against the plate is reduced.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG. In FIG. 1, (a), (b), and (c) show a state at the time of outsert molding, where (a) is a cross-sectional front view of a frame described later, (b) is a bottom face, and (c) Indicates side surfaces of the frame.
(D) and (e) show a state in which a lever described later is rotated after the outsert molding, (d) shows a bottom surface, and (e) shows a side surface of a cross section of the frame. FIG.
In the figure, reference numeral 1 denotes the frame made of a sheet metal, and the frame 1 is provided with a circular hole 2 penetrating therethrough. A fan-shaped recess 4 is provided over a predetermined angle range. The recesses 4 are provided at two points symmetrically about the center of the round hole 2.

The lever 5 has the main part 6 on the other side 7 of the frame 1, the shaft 8 in the round hole 2, and the retaining part 9 on the one side 3 of the frame 1. In addition, they are integrally formed by well-known outsert molding.
The two retaining portions 9 are point-symmetric with respect to the center of the shaft portion 8, are larger in the radial direction than the shaft portion 8, and have a size that can be fitted into the recess 4. Moreover, the angle range is sufficiently narrower than the angle range of the concave portion 4 and is formed so as to avoid the concave portion 4 as shown in FIGS. 1 (a), 1 (b) and 1 (c).

As described above, in a state where the lever 5 is formed on the frame 1 by outsert molding, the lever 5 contracts slightly, and as shown in FIGS. 8 is slightly thinner than the round hole 2,
As shown in (a), since the frame 1 is sandwiched between the main part 6 and the retaining part 9, the rotation of the lever 5 with respect to the frame 1 is heavy. By rotating the lever 5 forcibly, the retaining portion 9 is fitted into the concave portion 4 as shown in FIGS. 1 (d) and 1 (e). As a result, the holding of the main portion 6 and the retaining portion 9 on the frame 1 is loosened, and the lever 5 rotates with respect to the frame 1 over a range where the retaining portion 9 is fitted into the concave portion 4. Be free.

In the above description, the case where the rotating body is only the single lever 5 is used. However, in a case where a large number of rotating bodies other than the lever 5 are formed at the same time, the present invention can be implemented in substantially the same manner. Further, the number of the concave portions 4 is not limited to two, and may be more. The number of the retaining portions 9 is not limited to two, and may be larger as long as the number of the concave portions 4 is not exceeded.

In the above embodiment, the case where the lever as the rotating body is attached to the frame has been described. However, as shown in FIG. 2, the present invention can be applied to the case where the slider as the sliding body is attached to the frame. In FIG. 2, (a) and (d) show a state at the time of outsert molding, where (a) shows a plane and (b) shows a frame.
2 shows a side surface taken along the line AA of FIG.
(B), (c), and (e) show a state in which a slider described later is slid after the outsert molding. (B) is a plane, (c) is a bottom surface, and (e) is a frame. b)
2 shows a side surface taken along a line BB of FIG. FIG.
In the above, 11 is the frame made of sheet metal,
The frame 11 is provided with a long hole 12 penetrating therethrough. On a surface 13 on one side of the frame 11 on both sides along the longitudinal direction of the long hole 12, a concave portion 14 having a predetermined length is provided. Is provided.

The slider 15 has a main portion 16 on the other surface 17 of the frame 11, a penetrating portion 18 in the elongated hole 12, and a retaining portion 19 on the one surface 13 of the frame 11. In addition, they are integrally formed by well-known outsert molding. The two retaining portions 19 are symmetrical with respect to the center line of the elongated hole 12 and are larger than the penetrating portion 18 in a direction orthogonal to the longitudinal direction of the elongated hole 12. It is large enough to fit in the recess 14, and its length in the longitudinal direction is sufficiently shorter than the length of the recess 14, and is formed so as to avoid the recess 14 as shown in FIG. In this outsert molding, a well-known mold for outsert reaching the long hole 12 is used so that the penetrating portion 18 does not cover the entire long hole 12.

As described above, when the slider 15 is formed on the frame 11 by the outsert molding, the slider 15 contracts slightly. Therefore, as shown in FIG. Although it becomes slightly narrower,
As shown in (a), since the frame 11 is sandwiched between the main portion 16 and the retaining portion 19, the sliding of the slider 15 with respect to the frame 11 is heavy. By forcibly sliding the slider 15 to the left in FIG.
(B) The retaining portion 19 is fitted into the concave portion 14 as shown in (c) and (e). Thereby, the main part 16
The slider 15 is slidable with respect to the frame 11 over a range in which the stopper 19 is fitted into the recess 14.

In the above description, the sliding body is only a single slider 15, but in addition to this slider 15,
Even when a large number of sliding members, the above-mentioned rotating members, and non-movable members are formed at the same time, the present invention can be implemented in substantially the same manner.

[0015]

According to the method of mounting a movable member having the above-described structure, the movable member can be formed and mounted in fewer steps than in the conventional method.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing one embodiment of the present invention.

FIG. 2 is a schematic view showing another embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 frame 2 round hole 3 one side surface 4 concave portion 5 lever 6 main portion 7 other side surface 8 shaft portion 9 retaining portion 11 frame 12 long hole 13 one side surface 14 concave portion 15 slider 16 main portion 17 other side Surface 18 Penetration part 19 Retaining part

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B29C 45/00-45/84 B29C 33/00-33/76 H05K 7/00-7/20 G11B 15 / 43 G11B 33/12

Claims (2)

(57) [Claims] 1. A plate having a round hole penetrating the plate,
A plurality of concave portions are provided on one surface of the plate material over a predetermined angle range around the round hole, and a main portion of a rotating body is provided on the other surface of the plate material in the round hole. Is an angle range that is larger than the shaft portion in the radial direction, and that can be fitted into the recess, and that is sufficiently smaller than the predetermined angle, while avoiding the recess on the one surface. The retaining member is outsert-molded. Thereafter, the rotating member is rotated so that the retaining member is fitted into the concave portion, whereby the rotating member is rotatably attached to the plate member. A method for attaching a movable member, characterized in that: 2. A plate material, comprising: an elongated hole penetrating the plate material;
A concave portion having a predetermined length is provided on one surface of the plate material on both sides along the longitudinal direction of the slot, and a main portion of a sliding body is provided on the other surface of the plate material, A part of the inside has a penetrating part, and the one side surface is larger than the penetrating part in a direction orthogonal to the longitudinal direction of the long hole, and can be fitted in the concave part. Outsert molding of a retaining portion having a size that is sufficiently smaller than the predetermined length, and then sliding the sliding body so that the retaining portion fits into the concave portion; A moving member mounting method, wherein a moving body is slidably mounted on the plate member.