JPH0454625Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to an inlet and outlet post used in a tape cassette for a video cassette recorder, etc., and which functions as a tape guide.

(Prior Art) The tape in the cassette body of a tape cassette for a video cassette recorder (hereinafter simply referred to as VCR) is stretched over an inlet and an outlet post, as is well known, so that it runs smoothly, and is attached to one of a pair of reels. It is configured so that it can be wound up.

However, conventionally, as shown in FIG. 4A and B, this type of entrance and exit posts have been formed with cylindrical pillars 2 formed on the upper and lower cassette cases A and B, respectively, and on the outer periphery of their bases. There is a structure in which a recess 2b is formed, a cylindrical post 1A made of a metal material such as stainless steel is provided on the outer periphery of the column 2, and both ends of the post are press-fitted into the recess 2b to prevent play.

In addition, as another conventional example, as shown in FIG. In addition to forming a shaped fitting part 2c, a trapezoidal notch tapered on only one side or a V-shaped notch 1e as shown in the figure is formed in a part of both ends of the post 1B, which is formed by rolling a plate material into a cylindrical shape. There is a structure in which the notch 1e is positioned in the fitting part 2c to prevent backlash from occurring when the both ends of the post 1B are fitted over the outer periphery of the column 2 of each cassette case A, B.

(Problem that the invention aims to solve) However, the former uses a cylindrical round bar or a seamless pipe as the material, and in this case, the pipe itself is expensive, so the post is inevitably expensive. I had a problem.

In addition, in the latter case, in order to reduce material costs, the mainstream is to form a plate material by rolling it into a cylindrical shape. However, an acute-angled metal part like a V-shape is in contact with a rib-like fitting part 2c formed to prevent backlash, and this fitting part 2c is made of a synthetic resin material such as plastic. Since the convex portion is about m cubic in size, the thickness of the metal part of the post 1B should be set to a certain level, that is, about 0.5 m/m, in order to prevent rattling due to wear and tear caused by vibrations generated during use. Unavoidably, there was still the problem of high costs.

The present invention was proposed in view of the above points, and its purpose is to process a plate material and form a locking part in the post that engages with a notch in the support column formed in the cassette case. This prevents backlash and makes it possible to reduce the thickness of the post itself, thereby reducing costs.
Its purpose is to provide entrance and exit posts for VCR tape cassettes, etc.

(Means for solving problems) The present invention will be explained below with reference to the drawings.

Figures 1A to 1D show one embodiment of the present invention, in which a substantially cylindrical post 1 formed by rolling a plate material 1a as shown in Figure A into a ball as shown in Figure B is a pressed product. It consists of In this case, a pair of notches 1 are formed diagonally outward from the edge in the expanded state at the upper and lower portions of the substantially central portions of both ends of the material 1a.
b are respectively formed, and the central portion thereof is bent inward to form a locking portion 1c. In other words, as shown in FIG. 2 in detail, a locking portion 1c that is bent inward is formed in a part of the seam portion 1d of the post 1. This locking portion 1c has spring properties due to its material and bending.

It should be noted that the post 1 is completed by pressing a plate material as described above, and passing through a hardening and polishing process.

On the other hand, a part of the outer periphery of the distal end of the support column 2, which is formed in the upper and lower cassette cases A and B, and whose distal end is tapered as necessary, has a substantially V-shape in the vertical direction. A notch-shaped locking portion 2a is formed, and the locking portion 1c is bent inwardly into the concave locking portion 2a and protrudes in a substantially V-shape.
is locked. The outer diameter of the base of the strut 2 is formed to be approximately equal to the inner diameter of the post 1, and when the post 1 is fitted into the strut 2, the two are configured to fit tightly together.

Therefore, when assembling, for example, fit the lower end of the post 1 into the pillar 2 of the lower cassette case B, wrap tape (not shown), and then attach the upper end of the post 1 to the pillar 2 of the upper cassette case A. 2, the post 1 can be incorporated into the case. The assembly procedure is not necessarily limited to this. In this case, the locking portion 1c of the post 1 having spring properties is locked within the locking portion 2a formed on the support column 2, thereby preventing rattling. Therefore, in the past, the wall thickness of the post was considered in order to prevent rattling, but in the present invention, the locking means is used to prevent rattling, making it possible to reduce the wall thickness. The post 1 can be formed by pressing a plate material of about 0.2 m/m as the material 1a, and the material can be saved by a large amount compared to the conventional method.

In addition, it goes without saying that in the above, the tape is stretched over an area other than the area where the locking part 1c is formed.

In addition, if the strength of the post itself is weak due to thinning the material and there is a problem in use, it is possible to improve the strength by forming vertical ribs on a part of the cylindrical part other than the tape contact surface. can be done, and there is no problem in practical use.

FIG. 2 shows a second embodiment of the present invention, and this embodiment is characterized in that a notch 1b is formed only at one end of the material 1a, and that part is used as a locking part 1c.

3A and 3B show a third embodiment of the present invention, in which a total of four incisions 1b are made in the ends of the material 1a, and two locking parts 1c are made in the seam part 1d of the post 1. , 1c is different from the first embodiment. In this case, since the center portion of the post 1 is circular, the strength of the post 1 is increased compared to the first embodiment. Other configurations and the like are substantially the same as those of the previous embodiment.

The post having the above structure can also be used as a fixed post installed in a tape mechanical deck such as a VCR cassette deck or an audio cassette deck. In other words, the post of the present invention can be easily installed by providing an integral support on the chassis side of the mechanical deck without using fixing means such as inserts, and then attaching it to the support. It is possible.

(Effects of the invention) As described above, according to the invention, the seam of the post is formed by pressing a plate material and rolling it into a substantially cylindrical shape, and is attached to the substantially cylindrical pillars formed in the upper and lower cassette cases. Since a locking part is formed in the section to prevent wobbling by being locked in a notch formed in the pillar, (a) the post can be reliably attached to the pillar, and the wall thickness of the post can be reduced. can be made thinner, and costs can be reduced compared to conventional products.

(b) The locking means of the post can be easily formed by press working, and is easy to manufacture, and can be obtained at a lower price and with higher precision than conventional products.

(c) The locking part protruding from the inside of the post has spring properties and is designed to hold down the support, so that part can absorb vibrations that may occur during use, reducing wear and tear during use. Less is.

There are advantages such as

[Brief explanation of the drawing]

Figure 1 shows the first embodiment of the present invention, where A is a developed view of a plate-shaped material, B is a perspective view of a post machined into a cylindrical shape, C is a sectional view showing the installed state, and D is A in Figure C. −
2 is a developed view of the material used in the second embodiment of the present invention, Figure 3 A and B are the third embodiment of the present invention, and Figure 4 A is a post of a conventional example. Figure 5 is a perspective view, B is a cross-sectional explanatory view showing the installed state, Figure 5 is A,
(b) are other conventional examples. 1... Post, 1a... Material, 1b... Notch, 1c... Locking part, 1b... Seam part, 2...
Post, 2a...Locking part, A...Upper cassette case, B...Lower cassette case.

Claims (1)

[Scope of utility model registration request] The post 1 is formed by pressing a plate material and rolling it into a substantially cylindrical shape, and is attached to the substantially cylindrical supports 2 formed in the upper and lower cassette cases A and B, respectively. In addition, a substantially V-shaped locking portion 1c is formed which is locked in the substantially V-shaped notch 2a and has a spring property to prevent rattling. An entrance/exit post for a tape cassette for a video cassette recorder, etc., characterized in that the part is bent inward.