JPH0322247A - Loading clamp mechanism - Google Patents

Abstract

PURPOSE:To simplify the moving system of a player by executing both the clamp of a disk and the saving motion of a roller after insertion is completed by a motor which moves the disk by driving roller, switching the motion by a tooth lacked gear and moving the disk to the position of engagement between this tooth lacked gear and a driving gear by a lever. CONSTITUTION:When a compact disk 3 is lightly inserted to an inserting port 2, a motor 32 is driven by a detecting means such as an optical sensor, etc., and the disk 3 is moved to the direction of a turn table and set in an initial state. Next, when the disk 3 is deeply inserted into a player enclosure 1, this disk is abutted to a tentacle pin 8 of an insertion completing lever 6 and the lever 6 is turned. Then, a trigger lever 10 is moved. Next, a tooth lacked gear 27 is rotated and a C type cam 33 is separated from a folk leg part 20 of the lever 10. Then, a projection 35, which is provided on the outside surface of the gear 27, is rotated and the lever 10 and insertion completing lever 6 are operated again. Thus, a process is finished to insert the disk.

Description

[Detailed Description of the Invention] [Summary] Disc transport (loading) by one motor
In a compact disc player, a lever that has a tentacle at the disc insertion completion position is driven by a motor to drive the rollers that perform the insertion process, as well as to clamp the disc when it has reached the insertion completion position and retract the roller. The loading-clamp mechanism is provided with a mechanism for engaging and disengaging a partially toothed gear that causes a disc clamping and roller retraction movement with respect to a gear, and further includes a mechanism that allows the tentacle of the lever to engage and disengage the disc when the disc is played, if necessary. A cam mechanism that prevents the disc from being moved by the tentacles of the lever after the disc reaches the insertion completion position until it is clamped; and a cam mechanism that prevents the disc from being moved by the tentacles of the lever; A cam mechanism is also provided to temporarily restrain the partially toothed gear so that it does not engage with the drive gear.

[Industrial Field of Application] The present invention relates to a disc loading and clamping mechanism suitable for use in, for example, a vehicle-mounted compact disc player.

[Conventional technology]

FIG. 6 shows a conventional example. 40 is a disc to be inserted (loaded) into Funpaku 1 disc player, 41
42 is a pressure roller that presses the disk by force P, and 42 is a drive roller that transports the disk 40, which is driven at a reduced speed by a dedicated motor 43 and gear transmission 44. In this example, a position detection sensor 45 such as an optical sensor detects that the disk 40 has reached the insertion completion position, and the signal starts another motor 46 to cause the disk to slide through a gear transmission 47. By moving the lever 48 to the right, the clamper 49 is lowered by the cam groove 50, and the disc 40 is clamped onto a turntable (not shown).

Only one motor 43 instead of motors 43 and 46
In the case of driving by only the gear 52 of the transmission 44, the plunger 51 switches the gear 52 of the transmission 44 so that it can also engage the transmission 47. Plunger 51 is sensor 45
The switching operation is performed by

Also, in order to stop the disc at that position when the disc reaches the insertion completion position, it is sufficient to have two stopper pins installed in the housing, but in line with recent trends, one compact disc player Diameter 12cm and 3
If it were to be possible to use either of the two types of disks (cm), there would be a problem that a fixed stopper pin would not be able to handle the two types of disks.

[Problem to be solved by the invention]

When the motors 43 and 46 are used together as in the prior art,
Two gear transmission systems such as 44 and 47 are also required for deceleration. If we were to use only the motor 43, we would have to add the plunger 51 and related parts, which would increase the number of parts and require a large space for them. It cannot be downsized.

Previous attempts have been made to detect the complete insertion position of the disc by mechanical means, that is, by using a lever with tentacles, but the mechanism for moving the lever to a safe position after clamping the disc is complicated, and many It required a large number of parts and a considerable amount of space. This lever is biased by a spring, so after the disc is moved by the rollers to the insertion completion position, the lever pushes the disc back again until the clamper descends to clamp the disc onto the turntable. , troubles such as misalignment may occur.

If the process from disk insertion (loading) to clamp and roller lowering is switched and driven by a single motor and gear transmission, there is also the problem that the switching mechanism tends to malfunction, and countermeasures are needed to prevent this.

The present invention solves these problems in the prior art, and also addresses new concerns that arise when adopting a switching drive.
The problem to be solved by the invention is to take countermeasures in advance.

[Means to solve the problem]

The loading-clamping mechanism of the present invention basically consists of:
In a compact disc player, a single motor for driving a roller for transporting a disc also performs a retracting motion of the roller after clamping the disc and inserting the disc. The clamping of the disk and the retraction movement of the roller after the insertion is completed are controlled by the other end of the lever, which is rotatably pivoted at the position and has a tentacle provided at one end that is placed in the position where the insertion of the disk is completed. It is characterized by being configured to move a partially toothed gear that transmits power to the raising mechanism to a position where it starts meshing with a driving gear provided in a transmission mechanism that drives the roller. , in some cases, the tentacle provided at one end of the lever, which is placed in the completed insertion position of the disk, is moved away from the engagement position with the periphery of the disk after clamping the disk. The partially toothed gear is provided with a protrusion for moving the other end thereof, and before the disc is at the disc insertion completion position, the disc is clamped by the tentacle of the lever that is engaged with the peripheral edge of the disc. so as not to be moved to
A cam mechanism for temporarily holding the lever at the disk insertion completion position is provided between the partially toothed gear and the lever; It is also possible to provide a cam mechanism between the partially toothed gear and the lever to temporarily restrain the partially toothed gear so that the gear does not move to a position where it starts meshing with the drive gear. It is something.

[For production]

Since the present invention has the structure as described above, the clamping of the disk and the retracting movement of the roller after completion of insertion are simultaneously performed by a motor that drives the roller and transports the disk. The switching of motion is by means of a partially toothed gear, and its movement into engagement with the drive gear is effected by a lever having a tentacle in the position of complete insertion of the disc.

After the disc is clamped on the turntable, the action of rotating the lever to move the tentacle away from the peripheral edge of the disc is performed by a protrusion provided on the partially toothed gear.

After the disc reaches the insertion completion position on the turntable, but before the disc is clamped, a cam mechanism installed on the partially toothed gear is used to prevent the disc from shifting due to the biasing force of the lever with tentacles. , to prevent trouble by restricting the movement of the lever at that time.

Furthermore, a disadvantage of switching mechanisms using partially toothed gears is that there is a risk of malfunction due to vibration, etc., so a cam mechanism that locks and waits just before the partially engaged gear enters the engagement position is provided to ensure operation. I consider it a thing.

〔Example〕

An example of the overall structure of a compact disc player embodying the present invention is shown in FIG. 1 (plan perspective view) and FIG. 2 (side perspective view). In these figures, 1 is a housing of a compact disc player, 2 is an insertion/ejection opening for inserting or ejecting a compact disc with a diameter of 12 cm or Gcm, and 3 is a 3 cm diameter compact disc placed on a turntable (not shown). Shows a compact disc. 4 and 5
These pins are positioning pins for correctly positioning the disc 3 on the turntable.Detailed explanation will be omitted since these pins are not directly related to the present invention, but these pins are provided on a rotating lever. The state shown in FIG. 1 is a position for positioning a disk 3 having a diameter of 8 cm. Diameter 120
When a disk number m is inserted, pins 4 and 5 are
The lever supporting the is pivoted to move the locating pins 4 and 5 to a position corresponding to a 12 cm diameter disc.

Reference numeral 6 in FIG. 1 is a lever (abbreviated as insertion completion lever) for detecting the completion of insertion of the disk 3. It is pivoted by a pin 7, and the left end pin 8 is connected to the positioning pins 4 and 5 for the disk. When the disk 3 is fed in by an insertion/ejection roller (not shown) until it collides with the positioning bins 4 and 5, a slight angle is formed around the pin 7. Rotate only
This causes the trigger lever to move as described below. Since this compact disc player is compatible with two types of discs, 8 cm and 12 cm in diameter, the pivot pin 7 of the insertion lever 6 can be used to identify the disc without being directly installed in the housing 1. It is installed on a lever 9 that rotates by a mechanism, and when a disk with a diameter of 12 cm is inserted, the pin 7 at the pivot point moves, and the pin 8 that becomes the tentacle moves to a position suitable for the disk. Therefore, in any case, irrespective of the diameter of the disc, the pin 8 of the insertion lever 6 will contact the periphery of the disc shortly before the disc is directly above the turntable, and the disc will be placed on the turntable by the positioning pin 4.5. As described above, the pin 7 rotates slightly around the pin 7 while moving until it stops directly above the pin 7.

As shown in FIG. 3, 10 is a trigger lever having an elongated hole l2 that engages with the pin 11 at the right end of the insertion lever 6, and is inserted into the bins 13 and l4 planted on the upper right side of the housing 1. It is supported by engaging elongated holes 15 and 16 so that it can slide only in the vertical direction in FIGS. 1 and 2. The trigger lever 10 has a tension spring 17 (Fig. 3).
It is biased upward l\ in FIGS. 1 and 2 by .

The trigger lever IO is integrally provided with a fork 18 as seen in FIGS. 2 and below, and as shown in detail in FIG. One leg 19 is provided with a protrusion 22 on the inside. Therefore, the fork 18 forms a leg gap 23 between the two legs 19 and 20, a recess 24 inside the projection 22, and recesses 25 and 26 on the left and right sides of the neck 21.

A partially toothed gear 27 that engages with the fork 18 is rotatably supported on a shaft 28 provided in the housing 1, and a part 29 of its periphery is not provided with teeth. Only the provided portion 30 meshes with the gear 31 on the drive side, and only then can power be transmitted. Although the gear train in the middle is not shown, the gear 3l is configured to be driven at a reduced speed by a motor 32 shown in FIG.

A C-shaped cam 33 is integrally formed on the outer surface of the partially toothed gear 27, so that at least a portion of the cam 33 enters the leg gap 23 formed in the fork 18 of the trigger lever 10. Trigger lever 10 is engaged. Two pin-shaped protrusions 34.3 are provided at predetermined positions on the outer surface of the partially toothed gear 27.
5 is provided. These protrusions engage with recesses 25 and 26 formed on the left and right sides of the neck 2l of the fork 18.

A small-diameter partially toothed gear (not shown) is integrally provided on the inner surface of the partially toothed gear 27, and the toothed portion of the gear is connected to the slide lever 36, which is movable in a direction parallel to the moving direction of the trigger lever 10. Only when the partially toothed gear 27 is engaged with the gear 3l, the slide lever 36 is moved vertically in FIGS. 1 and 2. In FIG. 5, it can be moved left and right.

The slide lever 36 has a pin 38 (Figures 2 and 5).
A cam surface shaped like an arm of the clanber (not shown) is mounted on the cam surface, and when the slide lever 36 is moved upward in FIG. 2 and rightward in FIG. 5, the clamper is lowered. Then, the disc 3 is clamped onto the turntable.

Also, in conjunction with the lowering of the clamp, the slide lever 36
A support lever for a roller (not shown) that presses and moves the disk 3 from below is rotated by the pin that engages with the cam groove 39, and the roller is lowered to a position where rotation of the disk 3 is not hindered.

Next, the operation of the compact disc player of the embodiment will be described. When a compact disc 3 with a diameter of 8 cm or 12 cm is lightly inserted into the insertion/ejection opening 2, the motor 32 is activated by a detection means such as an optical sensor, and drives a roller (not shown) to transport the disc 3 toward the turntable. . The main structure of the present invention is in the initial state shown in FIG. 5(A) up to this state.

When the disc 3 enters deeply into the player's housing 1, it first hits the pin 8, which is the tentacle of the insertion completion lever 6, so that the insertion completion lever 6 is rotated clockwise. As a result, the engagement between the pin 1l and the elongated hole 12 causes the trigger lever 10 to move to the lth position.
It is moved downward in FIGS. 3 and 2, and to the left in FIGS. 3 to 5, against the tension spring 7.

When the neck 21 of the trigger lever 10 pushes the protrusion 34 in the recess 25 to the left (FIGS. 3 to 5), the toothless portion 29 is moved relative to the drive gear 3l in the initial state (A). The partially toothed gear 27, which was facing and had no meshing, is rotated to the left by a slight angle, so that the toothed portion 30 moves to the position where it meshes with the drive gear 31 (see Fig. 5 (B). ) state) Since the gear 31 is decelerated by the same gear train in conjunction with the motor 32 transporting the disk 3, when the partially toothed gear 27 starts meshing,
Immediately, the partially toothed gear 27 is driven to rotate. At this time, at almost the same time, a small diameter partially toothed gear (not shown) on the inner surface side of the partially partially toothed gear 27 also starts meshing with the rack 37.
By rotationally driving the partially toothed gear 27, the slide lever 36 is moved to the right in FIG. 5 and upward in FIG. 2 (the state shown in FIG. 5(C)).

Prior to this, when the trigger lever 10 moves and pushes the protrusion 34 of the partially toothed gear 27 and rotates the partially toothed gear 27 to a position where it meshes with the drive gear 31, as shown in FIG.
), one leg 20 of the fork of the Traeger lever 10 is a C-shaped cam 3 provided on a partially toothed gear 27.
3, and the trigger lever 10 is prevented from further movement. This means that the rotation of the insertion completion lever 6 is stopped at that position, so the pin 8 at the tip of the insertion completion lever 6 acts as a stopper for the disk 3. This action, in cooperation with the positioning pins 4, 5, helps to accurately position the disc 3 on the turntable. The action of the trigger lever 0, the insertion lever 6, and therefore the C-shaped cam 33 as a stopper for the disk 3 continues until the state shown in FIG. 5(E), which will be described later.

When the partially toothed gear 27 is rotated from the state shown in FIG. 5(C) to the state shown in FIG. 5(D), the slide lever 36 is moved largely to the right (FIG. 5), thereby The roller that has been transporting the disk 3 moves away from the disk 3 due to the action of the cam groove 39 and descends, so the disk 3 is free for a short period of time when the clamper descends to the position where it presses the disk 3 due to the action of the pin 38. be placed in a state of At this time, the disk 3 may be pushed back through the pin 8 by the insertion lever 6 (see FIG. 3), which is urged in the return direction by the spring 17, and may be displaced from the turntable. In the illustrated embodiment, a protrusion 22 is formed on the fork leg 19 of the trigger lever 10, and at this stage, the protrusion 22 forms a C-shaped cam 33 as shown in FIG. 5(D).
The trigger lever 10 and the insertion lever 10 are held so as not to move in any direction by the engagement of the fork 18 and the C-shaped cam 33. Therefore, once the disc 3 is positioned on the turntable, it will not be displaced again.

This holding state continues until the state shown in FIG. 5(E), during which time the slide lever 36 advances and the clamping of the disk 3 is completed. It should be noted that if only this effect is desired, it is sufficient that the leg portion 19 of the fork engages with the outer periphery of the C-shaped cam 33, so it is not necessarily necessary to provide the protrusion 22.

After the partially toothed gear 27 further rotates and the outer periphery of the C-shaped cam 33 separates from the fork leg 20 of the trigger lever 10, the trigger lever 10 becomes movable, but at this time,
The projection 35 provided on the outer surface of the partially toothed gear 27 rotates and contacts the neck 21 of the trigger lever 10, pushing it to the left in FIGS. 3 to 5, so that the trigger lever 10 is not inserted. Complete lever 6 is moved again, this time pin 8
is separated from the periphery of the clamped disk 3. This is the state shown in FIG. 5(F), and as a result, the disc 3 can freely rotate on the turntable without being disturbed by the pin 8 of the insertion lever 6. The disc insertion process is completed.

As mentioned above, the action of restraining the fork 18 by the C-shaped cam 33 and holding the trigger lever 10 and therefore the insertion completion lever 6 at that position is achieved by the fork 18 being connected to the leg l9.
Further, in order to make the pin 8 of the insertion completion lever 6 act as a stopper for the disk 3, the fork 18 only needs to have a leg part 20, but as in the illustrated embodiment, the fork 18 has a leg part 19. When the protrusion 22 is provided on the protrusion 22 to form the concave portion 24, an effect is generated to hold the partially toothed gear 27 from engaging the drive gear 3l in the initial state shown in FIG. 5(A). .

In a car-mounted compact disc player, it is quite conceivable that the partially toothed gear 27 will rotate somewhat due to vibrations from the outside, and if the partially toothed gear 27 rotates by the time the disc 3 is placed on the turntable. If the disc meshes with the drive gear 31, the clamper starts to descend and the roller starts to retreat, making it impossible to insert the disc. However, if the initial free rotation angle is set large so that the partially toothed gear 27 rotates greatly and then meshes with the drive gear 31, the disc 3 does not push the pin 8 significantly after it contacts the pin 8 of the fully inserted lever 6. Since the partially toothed gear 27 is not driven, the operation becomes slow and the start of the player's performance is delayed.

In the present invention, when the concave part 24 is formed by providing the protrusion 22 on the leg part 19 of the fork 18, one end of the C-shaped cam 33 is held by the concave part 24, and the partially toothed gear 27 is held just before it meshes with the drive gear 31. By the way, it becomes possible to manufacture a player that can be stopped reliably, has a quick response, and is free from malfunctions.

Needless to say, when ejecting the disk 3, the above-mentioned insertion process proceeds in the opposite direction in response to the ejection command, and the operation is automatically performed until the disk 3 is stopped on the insertion/ejection day.

〔Effect of the invention〕

According to the present invention, the drive system of a compact disc player can be simplified, the number of parts can be reduced, and the overall size can be reduced. Moreover, its operation is reliable, and once the disc has landed on the floor, it will not be kicked out, or the clamp or roller retraction mechanism will not malfunction, and when the time comes, it will start operating immediately. can.

Further, since the present invention employs a mechanical disc detection means, it is possible to relatively easily construct a player that uses two types of compact discs, large and small.

[Brief explanation of the drawing]

FIG. 1 is a plan perspective view showing the overall structure of an embodiment of the present invention;
Fig. 2 is a side perspective view of the same, Fig. 3 is a perspective view showing the main parts of the embodiment of the present invention, Fig. 4 is a side view thereof, and Fig. 5 shows a comparison of various operating states of the main parts. The side perspective view, FIG. 6, is a conceptual diagram schematically showing the structure of a conventional example. 1... Housing, 2... Insertion/ejection port, 3...
・Compact disc, 4.5... Positioning pin, 6... Insertion completion lever 7...
・Pivot pin, 8... Pin, 9... Lever 10... Trigger lever 11... Pin, 13.14... Pin, 17... Tension spring, 19.20... Leg Part, 22...Protrusion, 24,25.26...Recess, 28...Shaft, 30...Toothed part, 32...Motor, 34.35...Protrusion, 37... - Rack, 39...Cam groove, 41...Pressure roller, 43.46...Motor, 45...Position detection sensor, 49...Clamper, 5l...Plunger. l2... Long hole, 15.16... Long hole, 18... Fork, 21... Neck, 23... Leg gap, 27... Gear with missing teeth, 29... Toothless Part, 31... Drive gear, 33... C-shaped cam, 36... Slide lever 38... Pin, 40... Disc, 42... Drive roller, 44.47... Gear transmission Device, 48...Slide lever 50...Cam groove, 4l:1 6th 40...Compact disc 43. 46...Motor 49...Clamper 50...Cam groove 51...Plunger

Claims (1)

[Scope of Claims] 1. A compact disc player in which a single motor for driving a roller for transporting the disc also causes the clamping of the disc and the retracting movement of the roller after completion of insertion, Clamping and completion of insertion of the disk by the other end of the lever, which is rotatably pivoted at a predetermined position corresponding to the diameter of the disk, and has a tentacle provided at one end that places the tentacle at the completion of insertion of the disk. The partially toothed gear that transmits power to a mechanism that causes a subsequent retraction movement of the roller is configured to move to a position where it starts meshing with a drive gear provided in a transmission mechanism that drives the roller. A loading-clamp mechanism featuring: 2. In order to separate the tentacle provided at one end of the lever, which is placed at the disk insertion completion position, from the engagement position with the periphery of the disk after clamping the disk, the other end of the lever is moved. 2. The loading-clamping mechanism according to claim 1, wherein a protrusion for movement is provided on the partially toothed gear. 3. Move the lever toward the disk so that the disk in the disk insertion completion position is not moved by the tentacles of the lever engaging the periphery of the disk before the disk is clamped. 2. The loading-clamp mechanism according to claim 1, further comprising a cam mechanism provided between said partially toothed gear and said lever to temporarily hold the gear in the insertion completion position. 4. A cam mechanism for temporarily restraining the partially toothed gear is provided so that the partially partially toothed gear does not move to the meshing start position with the driving gear before the disk reaches the insertion completion position. Loading according to claim 1, characterized in that it is provided between the partially toothed gear and the lever.
Clamp mechanism.