JPS6344904Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a switch actuation mechanism that operates a detection switch by engaging with a moving object that has reached a predetermined position, and in particular, the present invention relates to a switch actuation mechanism that operates a detection switch by engaging with a moving object that has reached a predetermined position. This relates to the operating mechanism of a switch that detects.

FIG. 1 shows a schematic perspective view of a video disc player. In the figure, a chassis 2 of a player main body 1 includes a through hole 3 formed approximately in the center thereof and a guide hole 4 formed in the vicinity of the through hole 3 in the longitudinal direction of the player. Through hole 3
is equipped with disk 5 to make it faster (e.g.
A drive device 6 that rotates at a speed of 1800 rpm) is provided such that a disk mounting portion protrudes from the 2 surfaces of the chassis. A slider 8 equipped with a pick-up means 7 for picking up recorded information on the disk 5 is provided below the chassis 2 so as to be movable relative to the chassis 2 in the radial direction of the disk 5. move along.

A lid member 9 is attached to the player body 1 so as to be openable and closable. This lid member 9 is a lid body 9a attached to the player body 1 so as to be openable and closable.
and a food plate 9b which rotatably holds a clamper 10 for clamping the disk 5 mounted on the drive device 6 and is fixed to the lid body 9a. A window 11 is provided for checking the rotational state from the outside. Further, the lid member 9 is provided with a lock pin 12 for maintaining the lid member 9 in a closed state, and this lock pin 12 is fitted into a hole 13 formed in the player body 1 when the lid member 9 is in the closed state. It is configured to be locked by a locking means (not shown) constituted by a plunger or the like. Note that 14a and 14b are operating mechanism sections that include various operating buttons.

In this configuration, since reproduction is performed from the inner circumference to the outer circumference of the disk 5, the slider 8 equipped with the pick-up means 7 is always at the innermost circumference position (so-called park position) shown in the figure except during reproduction. Further, the lid member 9 is configured to be openable only when the slider 8 is in the park position.
That is, a detection switch 15 is provided to detect that the slider 8 is at the park position.
Only when the detection switch 15 is in the on state, the plunger of the locking means is actuated by turning on the opening operation button, and the locking pin 12 is unlocked and can be opened.

Here, the detection switch 15 is fixed to the chassis with screws, etc., but it is extremely difficult to securely fix the switch 15 in a desired position due to the dimensional accuracy of the mounting holes of the detection switch 15, screws, etc. Therefore, the park position of the slider 8 cannot be detected accurately. Therefore, even though the slider 8 is in the park position, the detection switch 15 is in the OFF state and the lid member 9 cannot be opened, or the switch 15 is in the ON state before reaching the park position. Problems may occur, such as the playback start position being shifted.

SUMMARY OF THE PRESENT DISCLOSURE OF THE PRESENT DISCLOSURE The present invention has been made in consideration of the above, and has as its object to provide a switch operating mechanism which can reliably detect a predetermined position of a moving object regardless of misalignment of the fixed position of the detection switch.

The switch actuation mechanism according to the present invention includes an engagement piece that can engage with a movable body, an actuation piece that operates a detection switch, and a reference piece that faces the engagement piece (or actuation piece). A member that swingably supports the reference piece and the engaging piece (or actuating piece) is provided so as to be rotatable, and an adjustment means that passes through one of the reference piece and the engaging piece (or actuating piece) and is screwed into the other allows adjustment according to the fixed position of the detection switch, etc. It is characterized in that the relative position of the engaging piece and the actuating piece is adjusted by adjusting the position of the engaging piece and the actuating piece.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 2 is a perspective view of one embodiment of the switch operating mechanism according to the present invention, and a schematic plan view of a slider position detection mechanism in a disc player using the switch operating mechanism according to FIG. 3 is shown. In the switch operating mechanism 20 shown in FIG. 2, a rotating member 22 that is rotatably supported by a pin (not shown) inserted into its center hole 21 is engaged with a slider 8 as a moving body in FIG. It is provided with a reference piece 25 that faces the engaging piece 23, the actuating piece 24 that activates the detection switch 15 that detects the park position of the slider 8, the engaging piece 23, and the actuating piece 24. Here, for example, the engagement piece 23 is attached to the rotating member 22 so as to be swingable. An adjustment screw 26 serving as an adjustment means that passes through the reference piece 25 is screwed into the engagement piece 23.
By rotating this adjustment screw 26, the engagement piece 23 swings in response to this rotation, so that the relative position between the engagement piece 23 and the operating piece 24 can be adjusted.

In FIG. 3, 30 is a mechanical chassis provided below the chassis 2 shown in FIG.
A guide rail 31a that guides the slider 8,
31b. The park position of the slider 8 is defined by a slider stopper 33.
The stopper 33 is configured to move in the sliding direction of the slider 8 by rotation, and is locked by a fixing screw 34. The two-dot chain line indicates the state in which the slider 8 is located at the rearmost end (the outermost circumference in the radial direction of the disk).
In this state, the slider 8 contacts the cushion 35 and engages one end of the limit lever 36 to rotate it. As a result, the limit lever 36 operates a switch 37 at the other end that detects that the slider 8 is located at the rearmost end.

Next, the switch operating mechanism 2 in such a configuration
0 adjustment method will be explained.

First, after adjusting the position of the slider stopper 33 using the jig A38 and locking it with the fixing screw 34, the jig B39, which is longer than the jig A38, is positioned as shown in the third figure. On the other hand, for example, an input terminal of the light emitting device 40 is connected between the common terminal and the normally open terminal of the detection switch 15. Then, while pressing the slider 8 against the jig B39, gradually loosen the adjustment screw 26 of the switch operating mechanism 20, and when the lamp of the light emitting device 40 lights up, the adjustment screw 26
Stop the rotation of 6. Next, even if a jig C (not shown), which is longer than the jig B39, is replaced with the jig B and the slider 8 is pressed against the jig C, the lamp will not light up. After adjusting, move the slider 8 in the left and right directions in the figure and confirm that the lamp blinks. Note that the lengths of jigs A, B, and C are, for example, 77.8 mm, 78.3 mm, and 78.75 mm, respectively.

As detailed above, according to the present invention, even if the detection switch cannot be accurately fixed at the desired position due to the dimensional accuracy of the detection switch's mounting holes, screws, etc., the engagement piece 23 and the actuation piece By adjusting the relative position with respect to slider 24, the predetermined position of slider 8 can be reliably detected.

In addition, the switch actuation mechanism is separate from the detection switch, and the rotating member having the engagement piece, the actuation piece, and the reference piece is integrally constructed, so it is excellent in mass production.
Not only can costs be reduced, but it can also be used with any type of switch with a simple assembly process of simply attaching the rotating member.

In the above embodiment, a case has been described in which the present invention is applied to a switch that detects the park position of the slider 8, but the present invention is not limited to this.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view of a video disc player, FIG. 2 is a perspective view of an embodiment of a switch operating mechanism according to the present invention, and FIG. 3 is a diagram of a slider position detection mechanism in a disc player using such a switch operating mechanism. FIG. Explanation of the symbols of the main parts, 2... Chassis, 5...
... Disk, 6 ... Drive device, 7 ... Pickup means, 8 ... Slider, 9 ... Lid member, 10
... Clamper, 15, 37 ... Switch, 20
...Switch operating mechanism, 23...Engagement piece, 24...
...Operating piece, 26...Adjustment screw, 33...Slider stopper.

Claims (1)

[Claims for Utility Model Registration] (1) A detection switch that detects that a moving body is at a predetermined position is provided, and the detection switch is activated by engaging with the moving body that has reached the predetermined position. A switch actuation mechanism, comprising an engagement piece that can engage with the movable body, an actuation piece that actuates the detection switch, and a reference piece that faces the engagement piece or the actuation piece. a rotary member that swingably supports the actuating piece and is rotatable; A switch operating mechanism comprising an adjusting means for adjusting the relative position of the operating piece. (2) The switch operating mechanism according to claim 1, wherein the movable body is a slider mounted with a pickup means in a disc player and movable in the radial direction of the disc.