DE10022804A1 - CD holder for CD ROM, DVD etc., includes frame comprising flexible material which reduces tendency to break - Google Patents

Abstract

A CD holder for CD ROM, DVD etc., approximates to a square shape and is narrower than previously designed CD holders. The holder comprises a hinge and separate hinge frame consisting of a flexible material.

Description

1. problem

Conventional CD cases have the following two weaknesses, among others, which are remedied by the solutions presented in this patent:

• A) they tend to break on their hinges because the The flap is attached using two flat profiles is that have no lateral stiffening and therefore break even with a slight fall.
• B) The design of the retaining ring on the transparent CD Cases (so-called crystal cases) in the same material as the remaining shell leads to excessive tendency to break this Part.

2nd solution A. Improved hinge construction

The hinge pins sit on conventional CD cases on two outriggers, which are the weak point of the Show construction. You are with the geometry of the conventional CD case inevitable, however, so that Flap can turn around the drawer. The redesign suggests the edges of the drawer around which the flap turns to round off to do without the boom can. By simultaneously shifting the axis of rotation it is possible to have the flap the same extent as that To give the drawer and so the side walls of the flap in the Stiffen the hinge area. The back surface will divided into an area that is still part of the drawer remains and a second that becomes part of the flap and ensures additional stability of the side profiles. At the same time, this back profile serves as a support for the flap in the open state. The redesign leads to a much more stable and durable Connection of flap and lower part of the CD case, in front everything in the open state. A reverse execution this hinge (upside-down version) rounds the edges the flap and let it screw into the drawer, instead of around them like the conventional CD case.  

To avoid confusing the terms, the The following describes the regular version where the Flap turns around the drawer.

The construction of the pivot point (P) always follows the following scheme (shown in drawing 1):

• 1. First, the desired ratio of a and b is determined, the length of
  • 1. results from the height h (e.g. thickness of the booklet) and the wall thickness of the CD (d) including the surrounding edge (f).
  • 2. results from the difference between the total height of the CD (g) and a. It should be taken into account here that the size of h is inversely related to the height of the field for the lettering on the back (l).
• 2. The vertical coordinate of the pivot point P (y) is b / 2.
• 3. The horizontal coordinate of P (x) results from the Wall thickness of the CD (d) and the axis radius (r1).
• 4. r2 around P determined by the inner edge of the flap (Ka) the contour of the top edge of the drawer (Kb) and also how the lower edge (Kc) must be rounded off (r4). It may be necessary to bevel Ka to make it too strong Avoid rounding off Kb and Kc.

If all components according to the above instructions be constructed, the flap rotates 180 ° and then lies parallel to the drawer. CD and booklet can be removed become.

B. Retaining ring made of soft plastic for insertion in transparent CD cases

By inserting a retaining ring made of color-related or also contrasting soft plastic in the lower Mounting plate, which mostly for optical reasons transparent, but brittle plastic is the both functions transparency (area) and flexibility (Wreath) again allocated the optimal materials. The patent relates to the separation of the two Components and the use of different Materials for both, not on the construction of the Connection of the two parts. Possible constructions are executed in drawing 15.

By using a separate, flexible retaining ring becomes the lifespan of a transparent mounting plate significantly increased, and without any visual loss.  

The two suggestions for improvement outlined above also open up new possibilities in design and should - especially with regard to the new arrival of DVDs - in new, contemporary packaging. This should be the Principle of construction of the conventional CD maintain their constructive advantages with one underline new design.

3. Possible designs

• A) Hinge: The redesign of the hinge leads to (at least) three design variants, depending on the interests of the user, shown in drawings 2 (overview), 3 to 9 and 10 to 14:
  • 1. The outer appearance of the conventional CD case is retained (whereby the area for labeling the back remains as large as possible), the CD booklet retains its previous format and the hinge-side, transparent bar remains, which is indeed very attractive design options offers, e.g. B. Review of a second level. The area of the flap expands to the size of the base area, the extension arms are dropped and the hinge-side edges of the drawer are rounded off or beveled. Drawing 2, version 1.
  • 2. The new CD case becomes approx. 10 mm narrower, approaches the square shape. The format of the CD booklet is extended to the entire area - with the disadvantage that the area for the lettering on the back is approx. 25% narrower. The advantage of this design lies in the closed design, as not only is the lower edge of the back rounded, which cannot be avoided constructively, but all edges are rounded evenly. Drawing 2, version 2. This solution is shown as the preferred one in drawings 3 to 9.
  • 3. The new CD case is about 5 mm narrower, while the format of the conventional CD booklet is retained, only the transparent side bar is narrower than with conventional CDs. The hinge construction from example 2 is "turned upside down" (the terms of the construction instructions must also be reversed accordingly) and thus offers the advantage that the flap turns into the body and the hinge-side edge of the drawer (Kc) is also open to the fingers Condition holds. A disadvantage is the limited possibility of lettering on the back. Drawing 2, version 3, detailed in drawings 10 to 14.
• B) The preferred solution of the retaining ring consists of a square base with 30 mm edge length and strong rounded corners. It has a circumferential groove provided, with which he from below into a corresponding Recess of the mounting plate is pressed. A Version to "clip in" is a glued connection preferable because the two parts are lighter when needed can be separated again. Drawing 15, example 1.

Overview of the drawings

Drawing 1: Geometric basics
Drawing 2: Overview of the different versions
Drawing 3: View and terms
Drawing 4: Section through the hinge (version 2)
Drawing 5: Outside view of drawing 4
Drawing 6: Illustration of the opening process (version 2)
Drawing 7: back view of version 2
Figure 8: View of the hinge from below (version 2)
Drawing 9: View of the front of the new CD case
Figure 10: Section through the hinge (version 3)
Drawing 11: Outside view of drawing 10
Drawing 12: Illustration of the opening process (version 3)
Drawing 13: back view of version 3
Figure 14: View of the hinge from above (version 3)
Drawing 15: Section and top view of the retaining ring

Claims (2)

1. Redesigned CD (CD-ROM, DVD, etc.) - case with improved hinge and separate retaining ring flexible material. 2. Different versions of the above Components.