JPS62204489A - Parts for plastic outsert mechanism - Google Patents

Abstract

PURPOSE:To realize a cost down by outserting a plastic at a projecting part provided on a plate shaped member. CONSTITUTION:An oblique base 12 which supports a rotary cylinder is formed integrally with a mechanism substrate 13, and at the circumferential position of a hole part 14 provided in advance on the mechanism substrate 13, plural projecting pieces 12a-12c having different heights are formed with a bending. A plastic 15 is formed with an outsert so as to cover the projecting pieces 12a-12c, and the surface of the substrate 13 among the projecting pieces. Thus, by outserting the plastic 15 against the projecting pieces 12a-12c which are positioned at limited object positions, the plastic can be formed in a uniform thickness as shown in h1 and h2 at the surfaces of the projecting pieces 12a-12c.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a mechanical component in which at least a portion of a plate-like member is made of plastic outsert.

[Summary of the Invention] The present invention provides a plastic outsert mechanism component used, for example, as a component of V'I'R.
The cost of one part is reduced by outserts plastic onto the protruding part provided on the plate-like member.

[Prior art] For example, a structure in which plastic is outsert into a sheet metal is known as a mechanism board for a VTR, but it is possible to obtain a low-cost mechanism component by taking advantage of the mechanical strength and dimensional performance of the sheet metal as a basic member. be able to. However, it is impossible to outsert plastic in all positions of the sheet metal due to dimensional instability of the plastic, occurrence of aging, mechanical strength, etc. N is limited. For example, it cannot be applied to mechanical parts that differ in height and require high dimensional accuracy, such as the inclined base that supports the rotating cylinder of a VTR. .

Therefore, all parts of this type are made of metal materials.

Figure 4 shows the conventional structure of the inclined base mentioned above.
The inclined base 2 that supports the rotary cylinder 1 has a shape whose height differs depending on the position. For example, the height H of the right side part 2b is larger than the height H of the left side part 2a in the figure. ing.

The inclined base 2 is formed by die-casting of aluminum or the like having excellent mechanical strength and coefficient of thermal expansion, and is machined to a desired dimensional accuracy, and then the rotary cylinder 1 is attached thereto via screws. Further, the periphery of the inclined base 2 is attached to the mechanism board 4 via screws 3.

The inclined base 2 may be die-cast integrally with the mechanism board 4.

[Problems to be Solved by the Invention] Mechanical parts are manufactured by die-casting and machining using metal materials for parts with special shapes that require particularly high dimensional accuracy. Therefore, there is an unavoidable increase in the cost of parts.

The present invention was made to solve such problems, and an object of the present invention is to provide a plastic outsert mechanism component that enables cost reduction.

[Means for Solving the Problems] In order to solve the above problems, the present invention forms a plurality of protruding pieces having different heights at arbitrary positions on a plate-like member, and It is characterized by plastic outsert on the surface of the plate-like member between the pieces.

[Operation] Since the target positions where the plastic is outsert are limited to only the plurality of protruding pieces and the surface of the plate member between them, mechanical parts can be manufactured by taking advantage of the advantages of plastic. Therefore, cost reduction can be achieved.

[Embodiment of the Invention] FIG. 1 shows a plastic outsert mechanism component according to an embodiment of the present invention, in which an inclined base 12 supporting a rotating cylinder is integrally formed with a mechanism board 13, and is pre-installed on the mechanism board 13. A plurality of protruding pieces 12 a + 12 b of different sieving sizes are placed on the circumferential position of the hole 14 .
t l 2 c are formed by bending, and these protruding pieces 12a, 12b.

Plastic 15 is formed by outsert to cover the surface of substrate 13 between 12c and these protruding pieces. The protruding piece 1 which is the target position limited in this way
By outsert the plastic to 2a, 12b, 12c, it is possible to form plastic with a uniform thickness on the surfaces of the protruding pieces 12a, L2b, 12c as shown by +11 th2.

FIG. 2 shows the top surface structure of the mechanism board 13 before being outsert, and FIG. 3 shows the top surface structure of the mechanism board 13 after being outsert. Through holes 16 are provided for the mechanism board 13 and the protruding pieces 12a, 12b+12c.
By providing a, L6b, 16c+16d, . . . , the plastic 15 can be formed through the through hole to the back surface at the time of outsert.

If the inclined base 12 is provided using a member common to the mechanism board 13 in this way, by taking advantage of the mechanical strength and dimensional accuracy of the J& plate 13, the protruding pieces 12a at limited target positions, By forming plastic 15 on the surfaces of 12b and 12c, a mechanical component that takes advantage of the advantages of plastic can be obtained. That is, since a structure is obtained in which the dimensional accuracy of the external portion is maintained high, it is possible to form the inclined base substrate 12 that stably supports the one-rotation cylinder 11. Furthermore, machining of the mechanism board 13 can be made unnecessary.

In addition, the effects of aging, thermal expansion, etc. can be kept to an extremely low level.

If reinforcing additives, glass fibers, etc. are included in the plastic 15, dimensional accuracy, stability, mechanical strength, etc. can be further improved.

The number of protruding pieces provided on the mechanism board 1; 3 can be arbitrarily selected as required.

[Effects of the Invention] As described above, according to the present invention, since the plastic is outsert to a limited target position on a part of the mechanism board, it is possible to reduce the cost of parts.

[Brief explanation of drawings]

FIG. 1 is a side view showing an embodiment of the present invention, FIGS. 2 and 3 are top views showing the embodiment of the present invention, and FIG. 4 is a side view showing a conventional example. 12... Inclined base, 12a, 12b, 12c... Projecting piece, 13... Mechanical board, 15... Plastic. 16a, L6b, 16c, L6d...Through holes. 2a Figure 2

Claims (3)

[Claims] (1) In a mechanism component in which plastic is outsert in at least a portion of a plate-like member, a plurality of protruding pieces having different heights are formed at arbitrary positions on the plate-like member, and the surface of each protruding piece and each protruding piece are A plastic outsert mechanism component characterized by outserts plastic on the surface of a plate-like member between. (2) The plastic according to claim 1, characterized in that a through hole is formed at an arbitrary position in the plate member, and the plastic is also outsert on the back surface of the plate member through the through hole. Outsert mechanism parts. (3) The plastic outsert mechanism component according to claim 1, wherein the plate-like member is made of a metal material.