1. Field of the Invention
The present invention relates to a guiding mechanism disposed within an optical storage carrier player, especially to kind guiding mechanism with an opening or a deformation portion formed on the base to prevent the upward bending of the center portion of the guiding-rod.
2. Background of the Invention
Recently, because the techniques of electronics relevant industry are progressing daily, the practical application of relevant technique of the optical storage carrier player is also more prevalent. Especially, the storing equipment of a optical storage carrier player is forging toward high-speed era and requires high speed for storing and retrieving data.
Under the requirement of high rotating speed of a optical storage carrier player, the quality of the driving mechanism of the optical reading-head will severely influences the speed and stability of the data storage and reading process. Please refer to FIG. 1, which is an illustration for driving mechanism of screw-rod type of prior optical storage carrier player. The intended-to-action CD (not shown in the drawing) applies a main axis motor 10 arranged on the base plate 1 to drive itself. The driving mechanism 30 has a driving motor 31, and a gear set 32 connecting to a screw transmission rod 33 that passes through the reading-head 20, the reading-head 20 is used to read the CD data. The screw-transmission rod 33 passes through one side of the reading-head 20 to receive the driving force provided by the screw-transmission rod 33; and the guiding mechanism 50 passes through the other side of the reading-head 20. Because the rotation of the driving motor 31 drives the gear set 32 to make the screw-transmission rod 33 rotate and transmit, the reading-head 20 can move along the longitudinally axis of the guiding mechanism 50 for reading the CD data.
Please refer to FIG. 2, which is an illustration for the rack-typed-driving mechanism for the prior optical storage carrier player. The intended-to-move CD (not shown in the drawing) is driven by a main-axis motor 10 arranged on a base plate 1. And the driving mechanism 30 has a driving motor 31. The driving motor 31 drives a rack set 34 with a gear set 32. And the reading-head 20 is then applied for reading the CD data. One side of the reading-head 20 arranges with a moving seat 35 that is connected to rack set 34 and rides over a guiding mechanism 50. And another side passes through a guiding mechanism 50. Since the driving motor 31 rotates, drives the gear set 32, and makes the racket 34 move, so the reading-head 20 is driven to move along the longitudinal axis of the guiding rod of the guiding mechanism 50 for reading the CD data.
From above-mentioned prior art, we know that the stability of a optical reading-head 20 when the reading-head 20 is moving along the guiding mechanism 50 will influence the speed and stability of storing and reading the CD data. Please refer to FIG. 3, which is an embodiment illustration for the prior guiding mechanism. Because in prior driving-device, the screw rod type and the rack type individually have one set and two sets guiding mechanism 50, in order to understand easily and without confusion, one set guiding mechanism will be chosen for illustration.
The guiding mechanism 50 arranges with a guiding rod 51 that is a round rod can provide a reading-head 20 to move along an longitudinal axis of the guiding rod 51. One end of the guiding rod is placed on an receiving slot 531. The receiving slot 531 is arranged on a base 53. One side of the base 53 is arranged with an appropriate depth and becomes the receiving slot 531. A fastening device 52 is corresponding to the base 53 and can connect with the base 53. When the guiding rod 51 is placed on the receiving slot 531, the fastening device attached onto the base 53 to press the guiding rod 51 toward the receiving slot 531.
If the depth of the receiving slot 531 is designed larger than the height of the round rod, a gap will be created when the fastening device connects with the base 53, and it will make the guiding rod swing and shake in the receiving slot 531. Of course, the movement of the reading-head 20 is relatively unstable and creates a big barrier for reaching the high-speed requirement of a optical storage carrier player.
On the other hand, if the depth of the receiving slot 531 is designed smaller than the height of the round rod, it will cause the center portion of the guiding rod bending upward when the fastening device 52 presses the end of the guiding rod toward the base 53. When the reading head 20 moves, this situation will cause a wearing-out of the guiding rod 51 or a unstable movement of the reading head 20, or even can cause a machine failure or damage.
Therefore, the design or manufacture personnel usually devote a large amount of cost to improve the matching tolerance between the guiding rod 51 and the receiving slot 531. But because the frequent changes of surrounding temperature and frequency make the materials inflate in hot temperature and shrink in cold temperature, the problems of gap and upward bending happen all the time. These problems influence the driving speed of the reading-head and further severely influence the reading quality and efficiency of a optical storage carrier player, therefore a solution for this shortcoming is very urgent.
The main object of the present invention is to provide a guiding mechanism, through a structure improvement of a base to reach a smooth application of a guiding mechanism, the driving speed of a reading-head can be further improved and the reading quality and efficiency of the optical storage carrier player will become the best one.
To achieve above-mentioned objects, a guiding mechanism of the present invention includes: (a) a guiding rod for supporting a reading-head sliding thereon along a longitudinal axis of the guiding rod, the guiding rod having a first end and a center portion, (b) a base for supporting the first end of the guiding rod, the base having a receiving slot formed on a upper surface of the base, and a V-shaped opening formed on a bottom surface of the receiving slot, (c) a fastening device disposed on the base for pressing the guiding rod toward the receiving slot, and (d) a deformation portion formed on the upper surface of the base.
In order to prevent an upward bending of the center portion, the combination of a first height of the deformation portion and a depth of the receiving slot is larger than a second height of the guiding rod.
The deformation portion comprises an U-shaped portion and a circled portion formed on the upper surface of the base. The first end of the guiding rod is disposed beneath the U-shaped portion, and the fastening device is disposed on the circled portion.
When the first end of the guiding rod being pressed toward the receiving slot by the fastening device, (a) the first end of the guiding rod is positioned above the opening, and (b) the first height of the deformation portion is simultaneously reduced by the fastening device to make the fastening device firmly press the first end of the guiding rod.
For your esteemed review committee members to further understand and recognize the present invention, a detailed description matching with several drawings is presented as following.