JP2009054265A - Disk player for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disk player for vehicle in which rattle noise in a locked state can be prevented surely over a long period independently of ambient temperature change. <P>SOLUTION: A slide member 13 having a lock groove 13b is arranged so as to reciprocate at both left and right sides of a drive unit 2 with a whole mechanism such as disk conveying mechanism and drive mechanism mounted thereon, and a wire spring 15 is attached to the slide members 13 across the lock groove 13b. And when the drive unit 2 is locked while being supported to a case body 1 fixedly, by pressing and bending the wire spring 15 by a lock pin 4 built in the lock groove 13b, rattle between the lock groove 13b and the lock pin 4 is absorbed by elastic force of the wire spring 15. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an in-vehicle disc player that records and / or reproduces information on a disc such as a CD or a DVD, and in particular, a lock switching mechanism capable of switching a drive unit between a locked state and an unlocked state with respect to a frame. The present invention relates to an in-vehicle disc player.

  In an in-vehicle disc player that is used with a disc such as a CD or a DVD loaded, if a drive unit equipped with an optical pickup, a turntable, or the like is fixedly supported inside the frame, Since vibrations from the outside directly act on the optical pickup and disk (during information reproduction and recording) and it is easy to cause problems such as sound skipping, the drive unit is usually attached to the frame body via an elastic member such as a damper. It is designed so that external vibrations and shocks do not act directly on the optical pickup and disc during play. That is, this type of in-vehicle disc player is provided with a lock switching mechanism that switches the drive unit to a locked state or an unlocked state with respect to the frame body, and elastically supports the drive unit on the frame body during a disk playing operation. It is set in the unlocked state, and when the disc is transported (inserted / ejected), the drive unit is restrained to lock the frame.

  Such a lock switching mechanism is composed of a slide member disposed on both the left and right sides of the drive unit so as to be capable of moving back and forth, a lock pin protruding from the inner side wall of the frame, and the like. By moving the member back and forth, the lock pin is engaged with and disengaged from the lock groove formed in the slide member, and can be switched between a locked state and an unlocked state. Here, in order to absorb the difference in the coefficient of thermal expansion between the slide member and the lock pin and the dimensional variation between the two, it is necessary to secure a slight clearance between the lock pin and the lock groove. As a result, a backlash occurs between the lock pin and the lock groove in the locked state, and there is a problem that an abnormal noise called rattle noise is generated while the vehicle is running.

Therefore, conventionally, the groove width of the lock groove formed on the synthetic resin slide member is set to be slightly smaller than the outer dimension of the lock pin, and elastic such as a long hole or a thin part is formed around the lock groove. By forming the imparting portion and using this elasticity imparting portion, the groove width of the lock groove can be changed according to the outer dimension of the lock pin, so that the lock pin can be engaged with the lock groove without backlash. A lock switching mechanism is known (for example, see Patent Document 1). In such a lock switching mechanism, the lock pin pushes and widens the groove width of the lock groove to be in a locked state, so there is no need to secure a clearance between the lock pin and the lock groove, resulting in the clearance. Generation of rattle noise can be prevented.
JP 2004-334960 A

  However, in the conventional lock switching mechanism disclosed in Patent Document 1, an elastic imparting portion that changes the groove width of the lock groove according to the outer dimension of the lock pin is formed on a synthetic resin slide member. In addition, since the elastic characteristics of the synthetic resin under a high temperature environment are extremely worse than those at normal temperature, there is a problem that the function of the elasticity imparting portion is remarkably lowered as the environmental temperature increases. In addition, since the lock pin repeatedly engages and disengages while expanding the lock groove, the groove width of the lock groove gradually increases due to sliding wear with the lock pin, and the effect of suppressing rattle noise decreases with long-term use. There was also a problem of doing.

  The present invention has been made in view of the actual situation of the prior art as described above, and an object of the present invention is to be able to reliably prevent the occurrence of rattle noise in a locked state over a long period of time regardless of environmental temperature changes. To provide a disc player.

  In the present invention, the wire spring is held on the slide member so as to cut the lock groove vertically, and the lock pin is pressed against the wire spring when the drive unit is locked, so that the wire spring is bent and the backlash between the lock groove and the lock pin is reduced. To absorb.

  The in-vehicle disc player according to the present invention holds a wire spring so that a lock groove is vertically cut on a slide member disposed on both sides of a drive unit so as to be able to move forward and backward, and when the drive unit is locked, the lock pin of the frame is attached to the wire spring. Because the play between the lock groove and the lock pin is absorbed by pressing the wire spring, the vibration is applied to the wire spring even if external vibration is applied when the drive unit is locked. It can be absorbed by the elastic force, and the generation of rattle noise due to the clearance between the lock pin and the lock groove can be surely prevented over a long period regardless of the environmental temperature change.

  The present invention provides a frame having a disk insertion slot on the front surface, a disk transport mechanism for automatically transporting a disk inserted from the disk insertion slot between the disk insertion slot and a play position, and the inserted disk as described above. A drive mechanism that chucks and rotates at the play position, a drive unit that is mounted with these disk transport mechanism and drive mechanism and is elastically supported inside the frame body, and locks the drive unit to the frame body Or a lock switching mechanism that switches to an unlocked state, the lock switching mechanism being disposed on both sides of the drive unit so as to be able to move forward and backward, and from the inner wall of the frame to the movement path of the slide member. And a lock groove formed on the slide member. Accordingly, in the in-vehicle disc player in which the drive unit is held in a locked state, a wire spring is held in the slide member so as to vertically cut the lock groove, and the lock pin is attached to the wire spring when the drive unit is locked. It was set as the structure made to press-contact to.

  In the in-vehicle disc player configured as described above, when the drive unit is in the locked state, the wire spring held by the slide member is pressed against the lock pin and bent, thereby causing a play between the lock groove and the lock pin. Because it is absorbed, external vibration can be absorbed by the elastic force of the wire spring, and rattle noise caused by the clearance between the lock pin and the lock groove can be reliably prevented over a long period regardless of environmental temperature changes. be able to.

  In the above configuration, if the wire spring is held on the slide member in a bent state, the wire spring can be attached to the slide member without backlash by the elastic return force of the wire spring itself, and the pretension Since the applied wire spring is further bent when the lock pin is locked, it is preferable that a large elastic force can be generated by a small deformation amount of the wire spring.

  In the above configuration, when the wire spring is held in the lock groove while being inclined with respect to the moving direction of the slide member, the elastic force acting on the lock pin from the wire spring can be divided in the vertical direction and the front-rear direction. Since the play between the lock groove and the lock pin is absorbed in the vertical direction and the front-rear direction by the force, it is preferable that the rattle noise can be prevented more reliably.

  An embodiment will be described with reference to the drawings. FIG. 1 is a perspective view of an in-vehicle disc player according to an embodiment of the present invention, FIG. 2 is a perspective view of a drive unit provided in the disc player, and FIG. 4 is a left side view showing the ejection state of the disc player, FIG. 5 is a right side view showing the play state of the disc player, and FIG. 6 is a left side showing the play state of the disc player. FIG. 7 is a side view of a slide member provided in the disc player, FIG. 8 is a perspective view showing an attached state of the slide member and a wire spring, and FIG. 9 is an explanatory view showing a pressure contact state of the wire spring and a lock pin. FIG.

  As shown in FIG. 1, the in-vehicle disc player according to the present embodiment includes a box-shaped frame 1 that forms an outer shell of a main body device, and a drive unit 2 that is housed inside the frame 1. The drive unit 2 is elastically supported by the frame body 1 via a plurality of dampers 3 and springs (not shown). The front plate of the frame body 1 is formed with a horizontally long disc insertion slot 1a, and lock pins 4 are projected inwardly on both the left and right inner walls of the frame body 1.

  As shown in FIG. 2, the drive unit 2 has a base member 5 made of synthetic resin, and a metal support plate 6 is fixed to the front upper surface of the base member 5 with screws. A synthetic resin guide top 7 is integrated with the lower surface of the support plate 6 by snap coupling or the like. Between this guide top 7 and the inner bottom surface of the base member 5, the disc is conveyed opposite to the disc insertion slot 1 a. A space is defined. As shown in FIGS. 5 and 6, a rubber roller 8 is disposed in the disk conveyance space, and this roller 8 is driven to rotate in both forward and reverse directions by a driving force of a motor (not shown). It has become. The roller 8 is rotatably supported at the rear end of the roller bracket 9, and the front end of the roller bracket 9 is pivotally supported by the base member 5. A spring 10 is stretched between the center front side of the roller bracket 9 and the bottom surface of the base member 5. The roller bracket 9 brings the roller 8 close to the lower surface of the guide top 7 by the elastic force of the spring 10. It is biased in the direction. A pin (not shown) is provided at the rear end of the roller bracket 9, and the pin is inserted into a cam hole of a slide member, which will be described later. It is designed to rotate around. The guide top 7, the roller 8, and the roller bracket 9 constitute a disk transport mechanism.

  The left and right rear ends of the clamp arm 11 are pivotally supported on the rear wall of the base member 5, and a clamper 12 is rotatably supported on the front side of the central portion of the clamp arm 11. Although not shown, a spindle motor, an optical pickup, and the like constituting a drive mechanism are mounted on the back surface side of the base member 5, and the rotation axis of the spindle motor faces the lower surface of the clamper 12. The table is stuck. Further, a slide member 13 made of synthetic resin is disposed outside the left and right side walls of the base member 5, and both the slide members 13 are supported so as to be movable in the front-rear direction (X1-X2 direction) of the base member 5. Has been. Both slide members 13 are connected via a link mechanism (not shown) disposed on the back side of the base member 5, and when one slide member 13 moves back and forth using a motor (not shown) as a drive source, its movement Synchronously with this, the other slide member 13 is also moved forward and backward. In addition, pivot arms 14 are rotatably supported on the left and right side walls of the base member 5, and pins 14 a protruding from the pivot arms 14 are inserted into engagement holes 13 a formed in the slide member 13. Has been. Then, as the slide members 13 move forward and backward, the pin 14a moves in the engagement hole 13a, so that the rotating arm 14 is engaged with and disengaged from the lock plate 1b formed by bending on the left and right side walls of the frame body 1. It is supposed to be.

  As shown in FIG. 7, in addition to the engagement hole 13a, one slide member 13 is formed with a lock groove 13b, a cam hole 13c, and a projection 13d, and the other slide member 13 has a similar lock groove 13b. A cam hole 13c and a protrusion 13d are formed. The lock groove 13b has a horizontally long shape that opens the front end side and closes the rear end side, and the groove width of the lock groove 13b is set slightly larger than the outer dimensions of the lock pin 4 described above. A wire spring 15 is attached to the slide member 13 so as to longitudinally cut the rear end portion of the lock groove 13b. The wire spring 15 is held by the slide member 13 by three locking claws 13e. As shown in FIG. 8, the two locking claws 13e positioned above and below the lock groove 13b open the front side, and the remaining one locking claw 13e positioned in the middle opens the rear side. After the wire spring 15 is inserted into the lower locking claw 13e from obliquely above, the wire spring 15 is bent forward with the middle locking claw 13e as a fulcrum and inserted into the upper locking claw 13e. For example, the wire spring 15 can be held by the slide member 13 in a curved shape so as to swell rearward. Therefore, the wire spring 15 can be attached to the slide member 13 easily and without backlash by its own elastic restoring force without using any special fixing means such as adhesive or caulking. Further, the wire spring 15 is held by the slide member 13 in a rearward tilting posture in which the upper end portion is slightly inclined rearward, and the wire spring 15 is exposed so as to obliquely cross the rear end portion of the lock groove 13b.

  As described above, both slide members 13 move forward and backward using a motor (not shown) as a drive source. As described above, the lock grooves 13b are engaged with the lock pins 4 as the slide members 13 move forward and backward. By releasing, the lock switching mechanism for switching the drive unit 2 to the locked / unlocked state with respect to the frame 1 is operated. Further, as the slide members 13 move forward and backward, a pin (not shown) of the roller bracket 9 relatively moves in the cam hole 13c, whereby the roller bracket 9 is rotated and the roller 8 is moved up and down. Yes. Further, as the slide members 13 move forward and backward, the projections 13d are engaged with and disengaged from cams (not shown) formed on both side walls of the clamp arm 11, whereby the clamp arm 11 is rotated and the clamper 12 becomes the turntable. On the other hand, it moves up and down.

  Next, the operation of the in-vehicle disc player configured as described above will be described.

  As shown in FIGS. 3 and 4, when the disk D is ejected without being inserted into the main body device (standby state), both the slide members 13 are in the forward position on the front side of the base member 5, and Since the lock groove 13b engages with the lock pin 4 of the frame 1 and the rotating arm 14 that engages with the engagement hole 13a of both slide members 13 is in contact with the lock plate 1b of the frame 1, the disk The drive unit 2 on which the entire mechanism such as the transport mechanism and the drive mechanism is mounted is in a locked state in which it is fixedly supported with respect to the frame 1. At this time, since the lock pin 4 entering the lock groove 13b presses the wire spring 15 attached to the slide member 13 backward, the wire spring 15 attached in a pre-curved shape is further bent backward, and FIG. As shown, the reaction force F of the wire spring 15 bent in this way acts on the lock pin 4. As described above, since the wire spring 15 is held by the slide member 13 in a rearward tilting posture in which the upper end portion is slightly inclined rearward, the force F applied from the wire spring 15 to the lock pin 4 is the front-rear (horizontal) direction. Are divided into a component force F1 and a component force F2 in the vertical direction, and the backlash between the lock pin 4 and the lock groove 13b is absorbed not only in the front-rear direction but also in the vertical direction by these component forces F1, F2. Therefore, even if vibration is applied from the outside in the ejected state, this external vibration can be absorbed by the elastic force of the wire spring 15, and rattle noise is generated due to the clearance between the lock pin 4 and the lock groove 13b. Regardless of environmental temperature change, it can be reliably prevented over a long period of time.

  In this ejected state, the projections 13d of the slide members 13 are in contact with a cam (not shown) of the clamp arm 11, so that the clamp arm 11 is rotated upward and the clamper 12 is separated from the turntable. A space in which the disk D can be inserted is secured. Further, since a pin (not shown) of the roller bracket 9 is located at the upper position of the cam holes 13c of the slide members 13, the roller bracket 9 is in a forward inclined posture in which the rear end side supporting the roller 8 is raised. The outer peripheral surface of this is pressed against the lower surface of the guide top 7 under the elastic force of the spring 10.

  In this state, when the disk D is inserted into the apparatus main body from the disk insertion opening 1a of the frame body 1, the disk D reaches the roller 8 through the disk transport space above the roller bracket 9, and during this time, the disk D Since the disk detection means (not shown) is operated by the insertion, a motor (not shown) starts to rotate in one direction based on a signal from the disk detection means. As a result, the roller 8 starts to rotate in one direction by the driving force of the motor, and the disk D sandwiched between the roller 8 and the guide top 7 moves in the insertion direction (arrow X2 direction) by the rotational force of the roller 8. It is automatically conveyed. When the disk D is thus transported above the play position (a position where the center hole of the disk D is between the turntable and the clamper 12), a power switching mechanism (not shown) is operated by the edge of the disk D. Since the driving force of the motor is switched from the roller 8 to the slide member 13 by this power switching mechanism, both the slide members 13 move from the forward position to the backward position of the base member 5 using the motor as a drive source.

  Thus, while both slide members 13 move to the end position in the backward direction, the lock groove 13b of both slide members 13 is separated from the lock pin 4, and the pin 14a of the rotating arm 14 is engaged with the slide member 13. Since the rotation arm 14 and the lock plate 1b are disengaged by moving through the hole 13a, the base member 5 is in an unlocked state elastically supported by the frame body 1 by a plurality of dampers 3 and the like. Further, since the pin of the roller bracket 9 shifts from the upper position to the lower position of the cam hole 13c of both slide members 13, the roller bracket 9 rotates downward against the elastic force of the spring 10, and the roller bracket 9 The roller 8 supported on the rear end side is separated from the lower surface of the disk D. Further, at this timing, the projections 13d of the slide members 13 are separated from the cams of the clamp arms 11, so that the clamp arms 11 that support the clamper 12 rotate downward, and the center of the disk D is between the clamper 12 and the turntable. It will be clamped and will be in a play state as shown in FIG. 5 and FIG. In this play state, a spindle motor (not shown) is driven to integrally rotate the turntable, the disk D, and the clamper 12, and the optical pickup is moved in the radial direction of the disk D. Information reproduction operation or the like is performed.

  Further, when ejecting (ejecting) the disc D that has been reproduced, etc., the reverse operation is performed by turning on the eject button (not shown) and rotating the motor in the other direction. In this case, first, after the clamp arm 11 in the lowered position is rotated upward to release the chucking operation of the disk D by the clamper 12 and the turntable, the roller bracket 9 is rotated upward by the elastic force of the spring 10. By moving, the disk D enters an ejection start state in which the disk D is sandwiched between the guide top 7 and the roller 8, and then the disk D is moved from the play position toward the disk insertion slot 1a by the rotational force of the roller 8 in the other direction. It is automatically conveyed in the discharge direction (arrow X1 direction).

  As described above, in the in-vehicle disc player according to the present embodiment, the wire spring 15 is attached to the slide member 13 arranged to be movable forward and backward on both the left and right sides of the drive unit 2, and the wire spring 15 is attached to the lock groove 13 b of the slide member 13. Since it is exposed so as to be vertically cut inward, when the drive unit 2 is in a locked state in which it is fixedly supported with respect to the frame body 1, the wire spring 15 is pressed by the lock pin 4 that has entered the lock groove 13 b. Thus, the backlash between the lock groove 13b and the lock pin 4 can be absorbed by the elastic force of the wire spring 15. Therefore, even if vibration is applied from the outside when the drive unit 2 is locked, this vibration can be reliably absorbed by the elastic force of the wire spring 15, and in particular, the wire spring 15 has excellent elastic characteristics even in a high temperature environment. Therefore, the occurrence of rattle noise due to the clearance between the lock groove 13b and the lock pin 4 can be reliably prevented over a long period regardless of the environmental temperature change.

  In addition, since the wire spring 15 is attached to the slide member 13 in a bent state, the wire spring 15 can be attached to the slide member 13 easily and without backlash by its own elastic restoring force, and pre-tension is applied. Since the wire spring 15 is further bent when the lock pin 4 is locked, a large elastic force can be generated by a small deformation amount of the wire spring 16.

  Further, since the wire spring 15 is attached to the slide member 13 so as to cross the lock groove 13b obliquely, the elastic force F acting on the lock pin 4 from the wire spring 15 at the time of locking is generated by the longitudinal force F1 and F2 in the vertical direction. The play between the lock groove 13b and the lock pin 4 can be absorbed in the front-rear direction and the up-down direction, and the occurrence of rattle noise can be prevented more reliably.

1 is a perspective view of an in-vehicle disc player according to an embodiment of the present invention. It is a perspective view of the drive unit with which this disc player is equipped. It is a right view which shows the ejected state of this disc player. It is a left view which shows the ejection state of this disc player. It is a right view which shows the play state of this disc player. It is a left view which shows the play state of this disc player. It is a side view of the slide member with which this disc player is equipped. It is a perspective view which shows the attachment state of this slide member and a wire spring. It is explanatory drawing which shows the press-contact state of this wire spring and a lock pin.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Frame 1a Disc insertion slot 2 Drive unit 3 Damper 4 Lock pin 5 Base member 7 Guide top 8 Roller 9 Roller bracket 11 Clamp arm 12 Clamper 13 Slide member 13a Engagement hole 13b Lock groove 13c Cam hole 13d Protrusion 13e Locking claw 14 Rotating arm 15 wire spring

Claims (3)

A frame having a disc insertion slot on the front surface, a disc transport mechanism for automatically transporting a disc inserted from the disc insertion slot between the disc insertion slot and a play position, and a disc inserted at the play position. A drive mechanism that is driven to rotate by king, a drive unit that is mounted with these disk transport mechanism and drive mechanism and is elastically supported inside the frame, and a state in which the drive unit is locked or unlocked with respect to the frame A lock switching mechanism for switching to the slide unit, the lock switching mechanism projecting from both inner sides of the drive unit toward the moving path of the slide member. A locking pin that engages with a locking groove formed in the slide member. Accordingly, in the vehicle-mounted disc Pureya said Doraibuyunitto can be be maintained in a locked state,
An in-vehicle disc player characterized in that a wire spring is held on the slide member so as to cut the lock groove vertically, and the lock pin is pressed against the wire spring when the drive unit is locked.   2. The in-vehicle disc player according to claim 1, wherein the wire spring is attached to the slide member in a bent state.   2. The in-vehicle disc player according to claim 1, wherein the wire spring is inclined with respect to the moving direction of the slide member inside the lock groove.

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