JPH0325297Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a cleaner device for pick-up needles, and particularly to a cleaner device for pick-up needles that is configured to efficiently use the entire width of the cleaner portion for cleaning the pick-up needles to extend the cleaning life. The present invention relates to a cleaner device.

2. Prior Art For example, as a disc-shaped recording medium reproducing device having a pick-up stylus that contacts the recording surface of a disc-shaped recording medium and reproduces signals as the disc-shaped recording medium rotates, an apparatus using a grooveless capacitance method is used. It has been known. In such playback devices, the pick-up needle is brought into contact with the recording surface to play back the signal, so the pick-up needle is prone to dust, etc.
A pick-up needle cleaner device was needed to clean the pick-up needle. As a conventional cleaner device for pick-up needles, for example, a cleaner member provided with a cleaning brush material is provided in the regeneration device, and after the regeneration is completed, the pick-up needle returns from the regeneration position to the standby position before regeneration. There is a device that removes dust and the like that passes through a cleaner member and adheres to the tip of the needle by rotating the cleaner member.

Problems to be Solved by the Invention However, in the conventional pick-up needle cleaner device described above, the position of the cleaner member remains constant after the pick-up needle has finished regenerating, and the pick-up needle is always cleaned in the same part of the cleaner member. However, there was a problem in that the portion of the cleaner member that comes into contact with the pick-up needle is easily soiled and has a short cleaning life. Therefore, the conventional cleaner device has a problem in that the cleaner member needs to be replaced relatively frequently.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a pick-up needle cleaner device that solves the above-mentioned problems.

Means and Effects for Solving the Problems The present invention rotates a pick-up needle cleaner member to clean the pick-up needle when the pick-up needle that contacts a disc-shaped recording medium and reproduces signals moves to a non-reproducing position. In a pick-up needle cleaner device, means for rotating a cleaner member whose rotation center is variable when the pick-up needle moves to a non-regeneration position, and means for intermittently rotating in conjunction with the rotation of the cleaner member; means for varying a rotation center signal of the cleaner member in conjunction with the intermittent rotation,
The whole cleaning member for cleaning the pick-up needle is used efficiently to extend the cleaning life.

Embodiment FIG. 1 shows an embodiment of a pick-up needle cleaner device according to the present invention. FIGS. 2 and 3 show the main parts of a grooveless capacitive disk-shaped recording medium reproducing apparatus (hereinafter referred to as the reproducing apparatus) to which the cleaner device shown in FIG. 1 is applied.

In each figure, the cleaner device 1 shown in FIG. 1 is installed on the chassis 3 of the reproduction device 2 as shown in FIG. As shown in FIG. 2, when the disc 4 is mounted on the turntable 5, the playback device 2 is operated by a pick-up needle 6 provided at the tip of the cantilever 6.
The carriage 7 with a is a carriage drive mechanism 8.
It is configured to move in the direction of arrow _X1 from the standby position before playback. Further, in the reproduction device 2, when the carriage 7 moves in the direction of arrow _X1 and reaches above the disk 4, the pickup needle 6a is brought into contact with the disk 4 rotating together with the turntable 5 to reproduce the signal. Furthermore, after the playback is finished, the carriage moves in the direction of arrow _X2 and returns to its original standby position.

As shown in FIG _.
The cleaner device 1 is disposed on an extension of a trajectory A (indicated by a chain line in FIG. 3) through which the pick-up needle 6a passes when moving in the _X2 direction.

Here, the cleaner device 1 will be explained with reference to FIGS. 4 to 7.

As shown in FIGS. 1 and 7, a cleaner base 10 is provided with a cleaner member 9 formed by bundling a plurality of brush materials. The cleaner member 9 connects the base of the brush 9a made of pig hair to the cleaner base 1.
It is fitted into the mounting hole 10a of 0 and fixed.
The mounting holes 10a are arranged in the directions of arrows X ₁ and X ₂ and in the directions of arrows X ₁ and X ₂
It is provided in a direction that is inclined from the direction. Also,
The mounting holes 10a are provided in two rows, and each row is provided in a dogleg shape at a position shifted from each other.

Therefore, two rows of brushes 9a are formed on the cleaner base 10, the brushes 9a having bristles implanted in each attachment hole 10a, and the rows of brushes 9a are formed at positions shifted from each other.

Further, the cleaner section 9 is composed of a straight portion B formed by brushes 9a arranged in the directions of arrows X ₁ and X ₂ , and a rotating portion C formed by brushes 9a arranged in a direction inclined from the straight portion C. .

Note that the straight portion B of the cleaner member 9 is provided at a position through which the pick-up needle 6a passes. Further, the cleaner base 10 has a protruding pin 11 that protrudes upward, a cylindrical bearing portion 12, and an oval through hole 13.

Reference numeral 14 denotes an engaging member, which includes a bearing portion 14a having a shaft hole.
, an engagement pin 14b that fits into and engages the through hole 13 of the cleaner base 10, and a spring hook portion 14c. Reference numeral 15 denotes a rotating body, which includes a bearing portion 15a into which the vertical shaft 3a is inserted from the chassis 3, a shaft 15b that fits into the bearing portion 14a of the engaging member 14 and the bearing portion 12 of the cleaner base 10, and a spring hook portion. 1
5c, and a gear portion 15d. Further, the rotating body 15 has an abutting portion 15f that protrudes from the side of the arm portion 15e extending from the bearing portion 15a, and an abutting portion 15f that abuts the arm portion 15e.
5e and a concave portion 15g at the tip. Reference numeral 16 denotes a coil spring, one end of which is hooked to a spring hook 14c of the cleaner base 10, and the other end hooked to a spring hook 15c of the rotating body 15.

Therefore, as shown in FIG.
It is rotatably supported on 5 with an engaging member 14 interposed therebetween.

The gear 17 is supported by a shaft 3b extending vertically from the chassis 3, and is fitted into a gear portion 15d of the rotating body 15, and has a ratchet lever 1 extending in an arc shape on the upper part.
7a, and a cylindrical bearing portion 17b. 18
is a ratchet gear, gear 1 as shown in Figure 6.
8a, a ratchet 18b provided below the gear 18a, and a through hole 18c that fits into the bearing portion 17b of the gear 17. Therefore, the ratchet gear 18 is coaxially stacked on top of the gear 17. Also, the ratchet 1 of the ratchet gear 18
A ratchet lever 17a of the gear 17 is in contact with the gear 8b.

As shown in FIG. 1, the tip of the ratchet lever 17a is oriented to engage with the stepped portion _18b1 of the ratchet 18b. Reference numeral 19 denotes a stopper, whose tip 19a abuts against the ratchet gear 18, and is fixed on the chassis 3. When the ratchet gear 18 rotates clockwise, the stopper 1
The tip 19a of the ratchet 18b is the inclined part 1 of the ratchet 18b.
It is elastically displaced in the outer circumferential direction along _8b2 . Further, when the ratchet gear 18 rotates counterclockwise, the tip 19a of the stopper 19 abuts and engages with the stepped portion _18b1 of the ratchet 18. Therefore, the ratchet gear 18 is only allowed to rotate clockwise by the stopper 19, and is prevented from rotating counterclockwise.

A variable gear 20 has a gear 20a that meshes with the gear 18a, an eccentric cam 20b that projects downward eccentrically from the center of the gear 20a, and a shaft hole 20c that fits into a shaft 3c that extends vertically from the chassis 3. The variable gear 20 is rotatably supported by a shaft 3c, and depending on the rotational position, the eccentric cam 20
The position of b is displaced. 21 is a coil spring, and one end is hooked to the recess 15g of the rotating body 15, and the other end is hooked to the hook 3d on the chassis 3. Therefore, the rotating body 15 is rotated by the tensile force of the spring 21.
It is energized clockwise around the center.

Note that since the rotating body 15 is biased by the spring 21, the contact portion 15f is connected to the eccentric cam 2 of the variable gear 20.
It is brought into contact with 0b. Therefore, the rotating body 15
changes its stop position according to the rotational position of the variable gear 20. 22 and 23 are gear holding members, which are fixed to the chassis 3 and also hold the ratchet gear 18,
It comes into contact with the upper surface of the variable gear 20 and holds it so that it does not come off the shafts 3b and 3c.

Next, the operation of the pick-up needle cleaner device constructed as described above will be explained.

In Figures 1 and 2, carriage 7 after regeneration is indicated by arrow X ₂
direction and return to the standby position. As the carriage 7 returns to the standby position, the pick-up needle 6a passes from point D to point E on the straight portion B of the brush 9a.
Therefore, the dust attached to the needle 6a is first removed while the needle 6a passes through the straight portion B of the brush 9a.

As shown in FIG. 7, when the pick-up needle 6a reaches point E, the carriage 7 comes into contact with the protruding pin 1 of the cleaner base 10. Further, when the carriage 7 is displaced in the direction of arrow _X2 , the cleaner base 10
is pressed by the protruding pin 11 and rotates counterclockwise about the shaft 15b. Therefore, the rotating portion C of the brush 9a comes into contact with the pickup needle 6a from a direction substantially perpendicular to the straight portion B of the brush 9a. That is, the pick-up needle 6a is cleaned by the brush 9a between point F and point G along with the rotation of the cleaner base 10, and the dust adhering to it during playback is removed.

Note that the pick-up needle 6a is raised when returning from the reproduction position, but immediately before reaching the cleaner device 1, it is lowered to a position where it can be cleaned.

Further, as the cleaner base 10 rotates counterclockwise, the engaging member 1 resists the tensile force of the spring 16.
4 rotates in the circumferential direction. Therefore, as the cleaner base 10 rotates, the cleaner base 10 comes into contact with the protruding pin 15h of the rotating body 15.
5 rotates in the same direction around the shaft 3a as the cleaner base 10 rotates. As a result, the rotating body 15
The gear 17 meshed with the gear portion 15d rotates a predetermined angle clockwise. The ratchet lever 17a of the gear 17 engages with the stepped portion _18b1 of the ratchet 18b, causing the ratchet gear 18 to integrally rotate in the same direction. Therefore, the variable gear 20 meshed with the gear 18a of the ratchet gear 18 rotates counterclockwise by a predetermined angle. That is, the variable gear 20 is rotationally displaced along with the rotation of the cleaner base 10 so as to vary the contact position of the eccentric cam 20b with respect to the contact portion 15f.

Here, when the playback mode is operated again, the pick-up needle 6a is raised to the position where it is separated by the brush 9a, and the carriage 7 moves to the playback position in the direction of arrow _X1.
move in the direction. The movement of the carriage 7 releases the pressure on the protruding pin 11 of the cleaner base 10, and the carriage 7 is separated from the protruding pin 11. During this time, the pick-up needle 6a was not cleaned in the rotating part C, but as soon as it was separated, the pick-up needle 6a descended and came into contact with the brush 9a, and in the direct part B, the pick-up needle 6a was cleaned in the _X1 direction as well as in the _X2 direction. become.

Note that the rotating body 15 is rotationally displaced clockwise by the tensile force of the spring 21. The rotating body 15 is a contact portion 15
f is brought into contact with the eccentric cam 20b of the variable gear 20 and stopped.

However, the variable gear 20 is rotated by a predetermined angle with respect to before the carriage 7 moves, and the eccentric cam 20
Since b has been displaced, the stopping position of the rotating body 15 is shifted from the position before operation. As the rotating body 15 rotates, the cleaner base 10 also rotates back clockwise due to the tensile force of the spring 16. However, since the stop position of the rotating body 15 is shifted, the rotating body 1
The shaft 15b, which is the rotating shaft of the cleaner base 10 supported on the cleaner base 5, stops at a position shifted from the position before operation.

That is, since the brush 9a of the cleaner member 9 is at a position shifted from the previous cleaning position with respect to the trajectory A that the pick-up needle 6a passes, the next time the carriage 7 returns to the standby position, the pick-up needle 6a will be moved to the straight line portion B. At this point, the brush 9a passes through a different part of the brush 9a from the previous time and is cleaned.
Furthermore, since the shaft 15b of the cleaner base 10 has been displaced, the pick-up needle 6a also passes through a different part of the brush 9a in the rotating part C, and dust is removed.

Note that when the rotating body 15 rotates clockwise, the gear 17 rotates counterclockwise, and the ratchet lever 17a moves toward the inclined portion 18b ₂ of the ratchet 18b.
, but the ratchet gear 18 is the stopper 1.
9, counterclockwise rotation is prevented. Therefore, the ratchet gear 18 and the variable gear 20 are allowed to rotate in only one direction due to the engagement between the ratchet 18b and the stopper 19.

In this way, the above operation causes the pick-up needle 6 to
Since the shaft 15b, which is the rotating shaft of the cleaner base 10, is changed each time the brush 9a returns to the standby position, the brush 9a passes through a different position on the cleaner base 10 each time the brush 9a returns. Note that the eccentric cam 20b is set so that the full width of the brushes 9a provided in two rows can be used depending on the rotation stop position thereof.

Therefore, only one part of the cleaner member 9 does not become particularly dirty, and the entire brushes 9a provided in two rows can be used efficiently to clean the pick-up needle 6a. Therefore, the cleaner member 9 formed by the brush 9a can clean the pick-up needle 6a for a longer period of time than in conventional devices. Further, the life of the cleaner member 9 is extended and the number of times the cleaner member 9 is replaced is reduced, which is convenient for the user as the troublesome replacement work is reduced.

Furthermore, when the cleaner member 9 is completely dirty and needs to be replaced, there is no need to remove the spring 16 and all that is required is to remove the cleaner base 10.
Replacement work can be done relatively easily.

In the above explanation, the pick-up stylus cleaner device is applied to a grooveless capacitance type playback device, but the device is not limited to this, and can be applied to, for example, a record player that plays records. Of course, it is also possible to remove the dust that has been removed.

Effects of the Invention As described above, the pick-up needle cleaner device according to the present invention rotates the cleaner member when the pick-up needle moves to the non-reproduction position, and at the same time includes a member that intermittently rotates the rotation center position of the cleaner member. Since the pick-up needle can be varied by using the width of the cleaner member, the entire width of the cleaner member can be used to clean the pick-up needle, which extends the life of the cleaner member, reducing the number of replacements of the cleaner member.
It has the advantage that it is very convenient for the user of the reproduction device because the number of troublesome replacement operations is reduced.

[Brief explanation of the drawing]

FIG. 1 is a plan view for explaining one embodiment of the cleaner device for pick-up needles according to the present invention, and FIGS. 2 and 3 are a disk-shaped recording medium reproducing device to which the cleaner device shown in FIG. 1 is applied. 4 is an exploded perspective view of the cleaner device shown in FIG. 1, and FIG. 5 is a side sectional view showing the rotating body with the engaging member and cleaner base assembled. figure,
FIG. 6 is a side sectional view showing the attached state of the gear, latchet gear, and variable gear, and FIG. 7 is a plan view when the cleaner member and rotating body rotate to clean the pick-up needle 6a. 1... Cleaner device, 6a... Pick-up needle, 9
...Cleaner member, 9a...Brush, 10...Cleaner base, 11...Protrusion pin, 14...Engagement member, 15
... Rotating body, 17a... Ratchet lever, 18... Ratchet gear, 19... Stopper, 20... Variable gear, 20b... Eccentric cam.

Claims (1)

[Scope of Claim for Utility Model Registration] In a pick-up needle cleaner device that rotates a pick-up needle cleaner member to clean the pick-up needle when the pick-up needle that contacts a disk-shaped recording medium and reproduces a signal moves to a non-reproducing position. means for rotating a cleaner member whose center of rotation is variable when the pick-up needle moves to a non-reproduction position; means for intermittent rotation in conjunction with the rotation of the cleaner member; and means for intermittent rotation in conjunction with the rotation of the cleaner member; and means for varying the rotational center position of the cleaner member.