JPH0454624Y2 - - 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 to be rolled up.

However, conventionally, as this type of entrance and exit posts, as shown in FIG. A recess 2b is formed on the outer periphery, a cylindrical post 1A made of a metal material such as stainless steel is placed over the outer periphery of the support 2, and both ends are press-fitted into the recess 2b to prevent play. There is.

In addition, as another conventional example, as shown in FIG. In addition to forming the fitting part 2c, a trapezoidal notch with only one side tapered or a V-shaped notch 1d 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. In addition, there is one in which the notch 1d is positioned at the fitting part 2c to prevent rattling when the both ends of the post 1B are fitted over the outer periphery of the column 2 of each cassette case A, B. In addition, 1c in the figure is a seam part.

(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 metal part of the post 1B should be made to have a certain thickness, 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 form a locking part with spring properties on a post made by pressing a plate material, thereby preventing rattling, and to prevent the post from shaking. The entrance of VCR tape cassettes, etc., which can reduce costs by making it possible to reduce the wall thickness.
The purpose is to provide an exit post.

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

Figures 1A to 1C show an embodiment of the present invention, in which a substantially cylindrical post 1 formed by rolling a plate material is made of a pressed product, and the sides slightly above and below the center of the post 1 are A portion of the tongue pieces 1a and 1b are formed by punching out substantially in the shape of the tongue pieces 1a and 1b. The tongues 1a, 1b are formed of a bent portion a extending obliquely toward the inside and a locking portion b connected approximately linearly at the tip thereof, and have spring properties.
Note that the tongues 1a and 1b are formed near the seam portion 1c. The post 1 is completed by pressing a plate material and passing through a hardening and polishing process.

On the other hand, a part of the outer periphery of the tip end portion of the support column 2 formed on the upper and lower cassette cases A and B is cut flat along the longitudinal direction to form a stepped portion 2a. Further, the outer diameter of the base of the strut 2 is formed to be approximately equal to the inner diameter of the post 1, so that when the post 1 is fitted into the strut 2, the two are tightly fitted. Note that the diameter of the tip of the support column 1 is tapered as necessary to facilitate fitting.

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. By fitting the post 1 into the case, the post 1 can be incorporated into the case. The assembly procedure is not necessarily limited to this. In this case, the locking portion b of each tongue piece 1a, 1b comes into contact with the stepped portion 2a of the support column 2, and the tongue piece 1a,
Since 1b has spring properties due to its material and shape, the post 1 is pulled in the direction F in Figure C, thereby preventing the post 1 from wobbling. Therefore, it is possible to make the wall thickness of the post 1 thinner, and the post 1 can be formed by pressing a plate material of about 0.2 m/m, which allows the material to be made wider than before. You can save money.

It goes without saying that in the above, the tape is stretched across areas other than the areas where the tongues 1a and 1b are formed.

Furthermore, if the strength of the post itself becomes weak due to thinning the thickness of the material during use, causing problems in use, the strength can be improved by forming a vertical rib on part of the cylindrical portion other than the tape contact surface, and there will be no practical problems.

Incidentally, 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 mechanical deck and an audio cassette mechanical 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 vicinity of the post with spring properties to hold down the support and prevent it from wobbling, (a) the post can be reliably attached to the support, 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 having plate material or spring properties can be easily formed by press working, and is easy to manufacture, and can be obtained at a lower cost and with higher precision than conventional products.

(c) The tongue protruding inside the post has spring properties and presses down on the support, so that part absorbs 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 is an embodiment of the present invention, A is a front view of a post according to the present invention, B is a partial perspective view showing the installed state, C is a sectional view showing the entire installed state, and Figure 2 A is a conventional post. A perspective view of the example post, B is a sectional explanatory view showing the attached state, and FIGS. 3A and 3B are other conventional examples. 1... Post, 1a, 1b... Tongue piece, 1c...
Seam part, 2... Support, 2a... Step part, A... Upper cassette case, B... Lower cassette case.

Claims (1)

[Scope of utility model registration request] The pillar 2 is attached near the seam part 1c of the post 1, which is formed by pressing a plate material and rolling it into a substantially cylindrical shape, and is attached to the substantially cylindrical pillars 2 formed in the upper and lower cassette cases A and B, respectively. Locking part b with spring properties to prevent wobbling when pressed
This locking part b has a pair of tongue pieces 1 which are partially punched out in a substantially shape in the upper and lower parts near the seam part 1c and bent toward the inside.
An entrance and exit post for a tape cassette for a video cassette recorder, etc., characterized by having an a, 1b structure.