JP3708315B2 - Door structure of recording / reproducing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a door structure that covers a loaded portion of a medium such as a disc in a disc player such as a CD player or a recording medium reproducing apparatus such as a cassette tape player.
[0002]
[Prior art]
A disc player such as a CD player and a recording medium playback device such as a cassette tape player are generally provided with a door for protecting a recording medium loading portion such as a disc. For such door types, a structure suitable for the loading method of a disk or the like is used. In the case of a playback apparatus of a type in which a user directly loads a disk or the like in a loading position, a rotating structure door is often used. The door with this rotating structure is a structure in which a flat door body is pivoted to the playback device body side, and the door body is always biased to the door open side by a spring. When the door is closed, the door body is engaged. When the door is opened, the locked state is released by a button operation or the like, and the door is opened by the elastic force of the spring.
[0003]
[Problems to be solved by the invention]
In the door having such a rotating structure, since the elastic force of the spring is relatively strong, a problem occurs in a portion added to a contact portion between the spring and the apparatus main body or the door. For example, since the force of the spring is strong, the abutting part of the apparatus main body is deformed, and particularly when it abuts on the back side of the apparatus surface, it is deformed and looks bad. Therefore, it is necessary to install a reinforcing iron plate. is there. In addition, when the tip of the spring hits the door or the main body of the device, the tip of the spring is relatively sharp, so it is stuck, and if the door moves poorly or is bad, it cannot be opened or closed. It is also possible to fall. In addition, the spring is usually mounted by inserting the winding portion of the spring into the rotation shaft, applying a force against the elastic force of the spring to bring the spring into a predetermined state, and loading both ends of the spring at predetermined positions. Therefore, there is a problem that the work is difficult.
[0004]
The present invention has been made in view of such problems, and an object of the present invention is to provide a door structure of a recording medium reproducing apparatus that can reduce the number of reinforcing parts and that can be easily assembled.
[0005]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention provides a door body that is pivotally fixed to cover a recording medium loading section, a winding section, a fulcrum side line section that contacts the apparatus main body side of the recording medium playback apparatus, In the door structure of the recording medium reproducing apparatus, which includes a return line spring that urges the door body toward the open side, and is provided on the apparatus body side. A recess in which the ridge portion is stored and fixed, an action side hole that is provided above the recess and through which the action side line portion of the return spring passes, and a fulcrum side line portion of the return spring that passes through the action side line portion of the return spring. The fulcrum side hole includes a fulcrum protrusion provided below the fulcrum side hole on the opposite side of the recess and abutting against an intermediate portion of the fulcrum side line portion of the return spring.
[0006]
Further, in such a configuration, a groove portion provided in the door main body and extending in a direction in which the action side line portion of the return spring extends, and an intermediate portion of the action side line portion of the return spring provided in the groove portion are provided. The return spring and the sliding protrusion that is brought into a sliding state by the opening and closing operation of the door body are provided.
[0007]
【Example】
Next, an embodiment of the present invention will be described. FIG. 1 is a block diagram showing the structure near the door of a disc player in one embodiment of the present invention. In order to make the explanation easy to understand, only the main part is described, and a disk turntable and an optical pickup for reading signals that are not directly related to the door structure are omitted.
[0008]
The door structure mainly includes a disk drive mechanism of a disk player, a signal processing unit, an audio circuit such as an amplifier, etc., and a main body 1 molded with a resin or the like that constitutes the outer casing of the disk player, and a door main body. A door main body 2 configured and molded from resin or the like, a door cover portion 3 having an L-shaped cross section that covers the door main body 2 and molded from resin or the like, and a spring 4 that gives the door main body 2 a restoring force in the opening direction. The door 5 is configured by combining the door body 2 and the door cover 3.
[0009]
First, the configuration of the main body 1 will be described. A disk loading hole 10 that forms a disk loading space is provided on the upper surface of the main body 1, and a turntable on which the disk is mounted, an optical pickup that reads the signal of the disk, and the like are provided at the bottom of the disk loading hole 10. A drive hole 11 for projecting into the disk loading space is provided.
The disk loading hole 10 is also open on the back side of the main body 1. Further, a step portion 12 is formed at the edge of the disk loading hole 10 so as to come into contact with the outer peripheral end portion of the door 5 when the door 5 is closed and to position the door 5 in the closed state. Shaft projections 13 for locking the door main body 2 protrude from the upper part of the open side of the back side of the disk loading hole 10, and these shaft projections 13 are chamfered at the corners of a rectangular parallelepiped whose longitudinal direction is slightly longer than the lateral direction. It has become a shape.
[0010]
At the bottom of the disk loading hole 10, there is provided a recess 14 for storing and fixing the spring 4, and a gear structure hole 15 into which a gear plate for restricting the opening speed of the door 5 when the door 5 described later is opened, In addition, a recess 16 is provided in a side surface of the disk loading hole 10 into which a projection for preventing the door 5 from being pulled out, which will be described later, enters. A push button 17 for opening the door is provided near the lower right of the disk loading hole 10 in FIG. In addition, each part of these disc loading holes 10 is integrally molded with the main body part 1 by resin molding.
[0011]
Next, the door main body 2 will be described with reference to FIG. FIG. 2 is a configuration diagram showing the structure of the door body 2, (A) is a bottom view, (B) is a top view, and (C) and (D) are side views. The outer shape of the door body 2 is slightly smaller than the shape formed by the inner side of the step portion 12 of the disk loading hole 10, and ribs 21 are provided in various places for strength maintenance, material reduction, and weight reduction. . A coupling groove 22 for coupling to the door cover 3 is provided along the outer periphery of the upper surface. In addition, since the bottom surface of the door main-body part 2 is visible when the door 5 is opened, a surface treatment is applied to improve the appearance.
[0012]
Moreover, the bearing part 23 which engages with the axial protrusion 13 and comprises a rotating shaft is comprised in the back | inner side edge part of FIG. The bearing portion 23 has a substantially circular dimension having a diameter that is substantially the same (slightly smaller) as the major axis of the shaft protrusion 13, and an open portion that is smaller than the major axis of the shaft protrusion 13 and substantially the same (slightly larger) dimension as the minor diameter. The circular hole 24 includes an opening hole 25 having a slightly smaller width on the side of the circular hole 24 that opens the circular hole 24 to the outside space. The circular hole 24 and the opening hole 25 are provided so as to protrude from the door cover 3. A protruding wall 26 is formed.
[0013]
1 is formed in the lower end of the right side surface of FIG. 1 in the door main body 2 and is formed in a fan shape with an angle of 90 degrees around the rotation axis of the door 5, and a gear is formed on the outer periphery. A gear plate 27 is formed, and the gear plate 24 is provided with a retaining protrusion 28 for preventing the door body 2 from coming off from the body 1. Further, a substantially fan-shaped retaining plate 29 formed toward the lower side of FIG. 1 is formed at the back side end of the left side surface of FIG. 1 in the door body 2, and the body of the door body 2 is formed on the retaining plate 29. A retaining protrusion 30 for preventing the part 1 from coming off is provided. And the locking protrusion 31 for locking the door 5 formed toward the lower side of FIG. 1 in the closed state is formed on the front side end of the right side surface of FIG. A locking claw 33 whose tip is a slope 32 is formed at the tip of the locking projection 31. A spring groove 32 in which a linear portion of one end of the spring is located is provided on the bottom surface of the door body 2, and a contact protrusion 33 with which the spring contacts is provided in the spring groove 32. In addition, each part of these door main-body parts 2 is integrally molded with the door main-body part 2 by resin molding.
[0014]
Next, the door cover part 3 is demonstrated using FIG. FIG. 3 is a configuration diagram showing the structure of the door cover portion 3, (A) is a bottom view, (B) is a top view, and (C) is a side view. The outer shape of the door cover portion 3 is formed in a shape slightly smaller than the outer shape of the disk loading hole 10 (a shape placed on the step portion 12). A coupling projection wall 35 for coupling to the coupling groove 22 is provided on the bottom surface of the door cover portion 3. The coupling projection wall 35 has a coupling projection for increasing the coupling force with the door body 2. 26 (the fitting groove 22 of the door main body 2 is provided with a fitting hole for fitting the coupling projection 2 at a corresponding position). Further, since the upper surface of the door cover portion 3 serves as an upper surface design of a disc player, a surface treatment is applied to improve the appearance, and decorations such as letters are applied.
[0015]
The spring 4 is formed by winding a highly elastic metal wire such as stainless steel or phosphor bronze, and comes into contact with the wound winding portion 50 and the door main body portion 2 to provide a restoring force to the door main body portion 2. The action point side line portion 51 to be applied and the fulcrum side line portion 52 which is in contact with the main body portion 1 and serves as a fulcrum portion. And the winding part 4 of the spring 4 is accommodated and fixed in the recessed part 14, and the action point side line part 51 and the fulcrum side line part 52 protrude from the hole provided in the recessed part 14, and are respectively the door main-body part 2 and the main-body part 1. Abut.
[0016]
Next, an assembly method will be described. First, the spring 4 is inserted into the recess 14 of the main body 1. At this time, the action point side line portion 51 protrudes above the concave portion 14 in FIG. 1 and the fulcrum side line portion 52 protrudes below the concave portion 14 in FIG. Then, the door 5 is fitted into the disc loading hole 10. Finally, the coupling projection wall 35 of the door cover part 3 is press-fitted into the coupling groove 22 of the door body part 2 to couple the door body part 2 and the door cover part 3 so that the rotating shaft part, ribs, etc. can be seen. Do not. At this time, the bonding strength may be increased using an adhesive or the like as necessary.
[0017]
Next, a method for fitting the door 5 into the disc loading hole 10 will be described with reference to FIG. 4A and 4B are schematic configuration diagrams showing a schematic structure of the door shaft locking mechanism. FIG. 4A shows the time when the insertion is started, and FIG. 4B shows the time when the insertion is completed. First, the door body 2 is erected, and the shaft protrusion 13 is inserted into the opening hole 25 with the opening hole 25 of the bearing 23 facing the shaft protrusion 13. At this time, since the shaft protrusion 13 has a narrower width with respect to the direction of entry into the opening hole 25, the shaft protrusion 13 reaches the circular hole 24. 4 (B) is then rotated (the door 5 is in a closed state). At this time, the retaining protrusions 28 and 30 come into contact with the wall surface of the main body 1 and the gear plate 27 and the retaining plate 29 are moved. It is bent and inserted into the gear structure hole 15 and the recess 16. When the door 5 is rotated to the position shown in FIG. 4B, the shaft protrusion 13 is wider in the direction of escape to the opening hole 25, so that the shaft protrusion 13 cannot be removed from the circular hole 24 and the retaining protrusion 28. Is caught on the edge of the gear structure hole 15, and the retaining protrusion 30 is caught in the recess 16, thereby preventing the door 5 from falling out of the disk loading hole 10.
[0018]
A damper gear 52 that performs a buffering operation is provided below the gear structure hole 15. When the gear plate 27 shown in FIG. 4B is inserted into the gear structure hole 15, the tooth portion 51 of the gear plate 27. Then, the toothed portion 53 of the damper gear 52 is meshed so that the door 5 opens at an appropriate speed when the door 5 is opened. The damper gear 52 can be configured using existing components such as an oil damper and a friction damper.
[0019]
The door 5 is removed from the disk loading hole 10 by first rotating the door 5 to the state shown in FIG. In this state, the shaft protrusion 13 has a narrower width with respect to the direction of entry into the opening hole 25, and thus the shaft protrusion 13 can be removed from the circular hole 24. At this time, since the retaining protrusions 28 and 30 are caught on the edge of the gear structure hole 15, the edge of the recess 16, etc., the gear plate 27 and the retaining plate 29 are bent so that the door 5 is moved from the disk loading hole 10. remove.
[0020]
Next, the door return mechanism will be described. FIG. 5 is a schematic configuration diagram showing a schematic structure of the door return mechanism. The spring 4 that applies a return (opening) force to the door 5 is stored in the recess 14. The recess 14 is formed integrally with the main body 1 in a space for accommodating the spring 4, but the recess 14 is provided with a tongue piece 62 that holds the spring 4 so as not to come out of the recess 14. An insertion hole 63 through which the portion 51 is inserted is provided. Then, a fulcrum protrusion 64 with which the fulcrum side line portion 51 of the spring 4 abuts is brought into contact with the edge of the insertion hole 63 on the side opposite to the concave portion 14 (molded integrally with the main body portion 1). (Not the tip) is in contact. Further, a protrusion reinforcing rib 65 for reinforcing the fulcrum protrusion 64 is provided so as to protrude integrally with the fulcrum protrusion 64. Further, the action point side line portion 51 of the spring 4 protrudes from the recess 14 toward the disk loading hole 10, the action point side line portion 51 extends along the spring groove 32, and an intermediate portion thereof abuts against the abutting protrusion 33. It is like that.
[0021]
With such a configuration, an elastic force in the opening direction is applied to the door 5 from the spring 4. The center of rotation of the door 5 and the winding portion 50 of the spring 4 do not coincide with each other, and the action point side line portion 51 of the spring 4 moves along the spring groove 32 as the door 5 rotates. Since the intermediate portion of the action point side line portion 51 is in a state of sliding with the contact protrusion 33, the tip end portion of the action point side line portion 51 of the spring 4 does not pierce the door 5, and the door 5 is smoothly opened and closed. Is possible.
[0022]
Next, the door opening operation mechanism will be described. FIG. 6 is a schematic configuration diagram showing a schematic structure of the door opening operation unit. The door opening operation mechanism includes a push button 17, an operating part 70, and a locking projection 31 provided on the door main body part 2. The operating part 70 is made of resin, and is fixed to the main body 1 so as to be rotatable about the operating shaft 71. The operating portion 70 is formed with an elastic piece 72 whose end is in contact with the main body portion 1 to give an elastic force in the direction of arrow A, and a locking claw 73 having a slope 74 at the tip. ing. In addition, an action tongue piece 75 is formed on the operating piece 70, and the action bar 71 of the push button 17 is in contact therewith.
[0023]
Next, the operation will be described. When the door 5 is closed, the locking claw 73 and the locking claw 33 are engaged. Here, when the push button 17 is pressed, the action tongue piece 75 is pressed by the action bar 7 and the action part 70 rotates in the direction of arrow B around the action axis. Then, the engagement between the locking claw 73 and the locking claw 33 is released, and the door 5 is opened by the elastic force of the spring 4. When the pressing of the push button 17 is released, the action portion 70 returns to the same position as the door 5 closed state by the elastic force of the elastic piece 72. When the door 5 is pressed and moved in the closing direction, the inclined surface 32 of the locking claw 33 presses the inclined surface 74 of the locking claw 73, and the action portion 70 rotates in the B direction. Then, the locking claw 33 gets over the locking claw 73. At the same time, the pressing state of the inclined claw 32 of the engaging claw 33 against the inclined surface 74 of the engaging claw 73 is released, and the action portion 70 returns to the same position as the door 5 closed state by the elastic force of the elastic piece 72. For this reason, the latching claw 73 and the latching claw 33 are engaged, and the door 5 is kept closed.
[0024]
As described above in detail, according to the present embodiment, the spring 4 is stored and fixed in the recess 14 instead of the rotating shaft, so that it is difficult to fix the shaft to be inserted into the bearing while resisting the spring force. Since there is no need to perform work, assembly is facilitated. Further, the spring 4, the main body 1, and the abutting portion can be set at positions not so much related to the rotation axis of the door, and a structure that increases the strength of the corresponding contacting portion can be relatively freely performed. A suitable door structure can be realized at low cost without relying on Moreover, since the door cover part 3 can hide the poor-looking bearing part and the reinforcing rib, the appearance of the product can be improved.
[0025]
【The invention's effect】
As described above in detail, according to the present invention, it is possible to realize a door structure of a recording / reproducing apparatus that has good appearance, has a small number of parts, and is easy to assemble.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing a structure near a door of a disc player in an embodiment of the present invention.
FIG. 2 is a configuration diagram showing a structure of a door body 2;
FIG. 3 is a configuration diagram showing a structure of a door cover part 3;
FIG. 4 is a schematic configuration diagram showing a schematic structure of a door shaft locking mechanism.
FIG. 5 is a schematic configuration diagram showing a schematic structure of a door return mechanism.
FIG. 6 is a schematic configuration diagram showing a schematic structure of a door opening operation unit.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Main-body part 2 ... Door main-body part 3 ... Door cover part 4 ... Spring 5 ... Door part

Claims (2)

A door body pivotally fixed to cover the recording medium loading section;
It is composed of a winding line part, a fulcrum side line part that comes into contact with the apparatus main body side of the recording medium playback device, and a working side line part that comes into contact with the door body, and is constituted by a return spring that biases the door body toward the open side. In the door structure of the recording medium playback device,
A recess provided on the device body side, in which the winding portion of the return spring is housed and fixed;
A working side hole provided above the recess and through which a working side line portion of the return spring passes;
A fulcrum side hole provided below the recess and through which the fulcrum side line portion of the return spring passes;
A door structure for a recording medium reproducing apparatus, comprising: a fulcrum protrusion provided below the fulcrum side hole on the opposite side of the recess and abutting against an intermediate part of a fulcrum side line portion of the return spring. A groove portion provided in the door body and extending in a direction in which a working side line portion of the return spring extends;
2. The sliding portion provided in the groove portion, which is in contact with an intermediate portion of a working-side line portion of the return spring, and which is brought into a sliding state with the return spring by opening / closing operation of the door body. The door structure of the recording medium reproducing device described.

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