JP3421392B2 - Floating lock mechanism - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive unit for reproducing a recording medium contained in a cartridge, which is mounted on a chassis in a floating manner, and locks the floating state of the drive unit. More particularly, the present invention relates to a floating lock mechanism in which a floating lock member is improved. 2. Description of the Related Art Generally, in a device requiring excellent vibration resistance, such as an in-vehicle CD player, a disk drive unit is mounted on a chassis in a floating manner. However, the drive unit is required to be in the floating state only at the time of reproduction, and at the time of the disk loading operation, it is required to lock the drive unit at a predetermined position in order to secure loading accuracy. Therefore, a floating lock mechanism has been conventionally proposed. This mechanism includes a movable floating lock member that engages with the drive unit and locks the floating state of the drive unit. The movement of the floating lock member locks and releases the drive unit. In recent years, the development of digital audio equipment has been remarkable. Among them, minidiscs (hereinafter referred to as MDs) have the following advantages a to c and have attracted widespread attention. That is, a. Extremely compact and housed in a cartridge for easy portability. ◎ b. Less deterioration of information. c. It has a recording and playback function. [0004] Accordingly, research and development of models and mechanisms corresponding to user needs for MD players for reproducing MDs have been promoted. For example, as the loading mechanism in the MD player, since the MD is housed in a cartridge, a cartridge loading mechanism that pulls the cartridge into the drive unit while holding the side surface of the cartridge and drops the cartridge together with the cartridge holder can be considered. [0005] When an MD player is used in an in-vehicle device or the like, a cartridge loading mechanism as described above is used to obtain excellent vibration resistance and operability. It is desired to use a floating lock mechanism together. However, when two mechanisms are provided, there is a problem that the configuration is complicated.
In particular, since the MD player for reproducing a compact MD is set small, the installation space for the mechanism is small, and it has been extremely difficult to simplify the configuration. The present invention has been proposed to solve the above problems, and an object of the present invention is to make a floating lock member for locking a floating state of a drive unit perform a raising / lowering operation of a cartridge. An object of the present invention is to provide a floating lock mechanism which simplifies the configuration of a cartridge loading mechanism and thereby contributes to simplification of a device having both a cartridge loading mechanism and a floating lock mechanism. In order to achieve the above-mentioned object, the present invention provides a drive unit for reproducing a recording medium contained in a cartridge, which is mounted on a chassis in a floating manner, and the drive unit is mounted on the drive unit. A floating lock mechanism provided with a movable floating lock member that engages and locks a floating state of a drive unit, wherein a cartridge holder that holds the cartridge is provided in the drive unit so as to be able to move up and down, and the floating lock member includes: A guide portion for guiding the raising and lowering operation of the cartridge holder is formed, and a cam portion for contacting the guide portion and moving the floating lock member to raise and lower the cartridge holder is formed on the cartridge holder. And a restricting portion for restricting the cartridge holder to the raised position by abutting. In the present invention having the above-described structure, in a standby state before the cartridge is pulled into the cartridge holder, the floating lock member locks the drive unit, and the guide portion is connected to the regulating portion on the cartridge holder side. Abuts and regulates the cartridge holder to the raised position. When the cartridge holder holds the cartridge, the floating lock member starts moving from this state so as to release the lock of the drive unit. With this movement, the guide section moves from the regulating section to the cam section, and furthermore, the guide section moves along the cam section to guide the lowering operation of the cartridge holder. Therefore, the cartridge holder descends onto the drive unit while holding the cartridge, and drops the cartridge into the drive unit. At this point, the floating lock member completes the unlocking operation of the drive unit, and the drive unit enters a reproducible state. On the other hand, when the floating lock member moves to perform the locking operation of the drive unit, the guide portion comes into contact with the cam portion from the opposite direction to guide the ascending operation of the cartridge holder. Therefore, the cartridge holder rises to the standby state while holding the cartridge. Then, when the guide portion comes into contact with the regulation portion on the cartridge holder side, the regulation portion regulates the cartridge holder to the raised position. At this point, the floating lock member ends the lock operation of the drive unit. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [Configuration of the present embodiment] An embodiment of the present invention will be specifically described below with reference to FIGS. This embodiment is applied to an MD player that plays back an MD stored in a cartridge C (shown in FIG. 4). 1 and 2
Is a left side view of the present embodiment, FIG. 3 is a plan view thereof, and FIG. 4 is a front view thereof. FIGS. 1, 3 and 4 show a standby state, and FIG. 2 shows a reproduction state. In the figure, members indicated by alternate long and short dash lines are the chassis 1
Floating means (not shown) such as a damper and a damper spring are installed inside the side surface. By inserting the damper shaft 2a into the floating means, the drive unit 2 is mounted in a floating manner. Drive unit 2 is M
It has a turntable on which D can be placed, and reproduces MD stored in cartridge C. At the both ends of the left side edge portion of the drive unit 2 and near the center of the right side edge portion, engaged portions 3 having notches formed in the horizontal direction are provided (shown in FIG. 2). A floating lock roller 8, which locks the floating state of the drive unit 2 in proximity to the engaged portions 3, is provided movably in the horizontal direction. The floating lock roller 8 has a lock pin 10 at the center thereof which can be inserted into the engaged portion 3, the left and right end portions are spread outward and have a drum shape as a whole, and the outermost portion is a guide portion 9. ing. Each floating lock roller 8 is attached to roller driving means (not shown) for driving the floating lock roller 8 so as to disengage the lock pin 10 with the engaged portion 3. A cartridge holder 4 is arranged above the drive unit 2 so as to be able to move up and down. The cartridge holder 4 has a cartridge insertion opening 4a formed at a front side edge portion, and holds the cartridge C inserted therefrom. Further, a cam portion 5 is provided on the left and right side surfaces of the cartridge 4 at positions corresponding to the engaged portions 3. The cam portion 5 is disposed so as to contact the guide portion 9 of the floating lock roller 8, and is configured to be vertically inclined so that the cartridge holder 4 is moved up and down by the movement of the floating lock roller 8. Further, a regulating portion 6 which is a horizontal side portion is formed continuously with the cam portion 5. The restricting portion 6 is a portion that contacts the guide portion 9 and restricts the cartridge holder 4 to the raised position. Further, a holder spring 7 is hung on the drive unit 2 and the cartridge holder 4, and the cartridge holder 4 is urged toward the drive unit 2 by the spring force of the holder spring 7. [Operation of this embodiment] Standby state: See FIG. 1 In this embodiment having the above-described configuration, in the standby state before the cartridge C is pulled into the cartridge holder 4, the lock pin 10 of the floating lock roller 8 Is engaged with the engaged portion 3 of the drive unit 2 and locks the drive unit 2. At this time, the guide portion 9 on the floating lock roller 8 side is in contact with the regulating portion 6 on the cartridge holder 4 side, and regulates the cartridge holder 4 to the raised position. Loading operation / floating lock release operation: see FIG. 2 The cartridge C is inserted into the cartridge holder 4 from the cartridge insertion slot 4a, and the cartridge holder 4 holds the cartridge C. When the holding of the cartridge C is completed, the roller driving means (not shown) operates, and the floating lock roller 8 starts moving so that the lock pin 10 is disengaged from the engaged portion 3. This movement causes the guide section 9 to move from the regulating section 6 to the cam section 5. Further, since the holder spring 7 urges the cartridge holder 4 toward the drive unit 2, the guide 9 moves along the cam 5. As a result, the cartridge holder 4 descends onto the drive unit 2 while holding the cartridge C, and drops the cartridge C into the drive unit 2.
At this point, the floating lock roller 8 is completely separated from the cartridge holder 4 to end the unlocking operation of the drive unit 2, and the drive unit 2 is in a reproducible state. Unloading operation / floating lock operation On the other hand, when the floating lock roller 8 moves to perform the floating lock operation of the drive unit 2, the guide portion 9 moves toward the cam portion 5, and the guide portion 9 Abut and move along. Therefore, the cartridge holder 4 rises to the rising position in the standby state while holding the cartridge C. When the guide portion 9 comes into contact with the regulating portion 6 on the cartridge holder 4 side, the regulating portion 6 regulates the cartridge holder 4 to the raised position. At this time, the lock pin 10 of the floating lock roller 8 is
And the floating lock operation has been completed. [Effects of the present embodiment] According to the present embodiment as described above, the guide portion 9 of the floating lock roller 8 is provided.
By contacting the cam unit 5, the lifting operation of the cartridge holder 4 can be controlled, so that the operation of dropping the cartridge C in the cartridge loading mechanism can be executed. Therefore, the configuration of the cartridge loading mechanism can be easily simplified. As a result, it is possible to simplify the configuration of the MD player having both the cartridge loading mechanism and the floating lock mechanism, and to realize an MD player most suitable for use in a vehicle. In addition,
The present invention is not limited to the embodiments described above, and the shapes, dimensions, and the like of the respective constituent members can be appropriately changed. As described above, according to the present invention, a guide portion for guiding the raising / lowering operation of the cartridge holder is formed on the floating lock member for locking the floating state of the drive unit. The floating lock member controls the raising and lowering operation of the cartridge by forming a cam portion which comes into contact with the guide portion and raises and lowers the cartridge holder by movement of the floating lock member, and a restricting portion which restricts the cartridge holder to the raised position. Therefore, the configuration of the cartridge loading mechanism is simplified,
This has contributed to simplification of equipment having both the cartridge loading mechanism and the floating lock mechanism.

[Brief description of the drawings] FIG. 1 is a left side view showing one embodiment of the present invention (standby state). FIG. 2 is a left side view of the embodiment (reproduction state). FIG. 3 is a plan view of the present embodiment. FIG. 4 is a front view of the present embodiment. [Explanation of symbols] 1 chassis 2 Floating unit 2a Damper shaft 3 Engaged part 4 Cartridge holder 4a Cartridge insertion slot 5 Cam part 6 Regulatory Department 7 Holder spring 8 Floating lock roller 9 Guide part 10 Lock pin C cartridge

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G11B 17/04 G11B 33/02

Claims (1)

(57) [Claim 1] A drive unit for reproducing a recording medium stored in a cartridge is mounted on a chassis in a floating manner, and is engaged with the drive unit to lock a floating state of the drive unit. In a floating lock mechanism provided with a movable floating lock member, a cartridge holder for holding the cartridge is provided in the drive unit so as to be able to move up and down, and a guide portion is formed in the floating lock member for guiding the raising and lowering operation of the cartridge holder. A cam portion for abutting the cartridge holder to move up and down the cartridge holder by movement of the floating lock member; and abutting the cartridge holder to the ascending position by abutting the guide portion. Floating lock mechanism and forming a regulating portion win.