JP3690586B2 - Cassette insertion slot structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an insertion slot structure for a cassette containing a recording medium.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, an information recording / reproducing apparatus using a cassette containing a recording medium, for example, an MD (mini disk), is used to close an insertion slot in order to prevent dust from entering the cassette from the insertion slot. A flap is attached.
FIG. 4 shows a conventional MD insertion slot structure. The insertion slot 100 is provided on the back side of a front panel (not shown) of the MD playback device, and includes a flap 102, a rotation shaft 101, and a rotation shaft 101 that rotate in an arc shape around the rotation shaft 101 as the MD is inserted. The movement of the flap 102 in the left-right direction is regulated by coming into contact with both ends of the stopper 103 and the rib 104 and the rotary shaft 101 that regulate the movement of the flap 102 in the front-rear direction (MD insertion / ejection direction) by fitting. Two ribs 105, an outer frame portion of the insertion port 100, and a guide rib 106 having a function as a positioning and guiding member (guide) for inserting and discharging the MD are schematically configured. The flap 102 is urged in the closing direction by a spring (not shown).
[0003]
[Problems to be solved by the invention]
By the way, in the conventional insertion port structure, since the two ribs 105 are provided on both the left and right sides of the flap 102 as described above, it is necessary to make a wide space for disposing the insertion port 100 on the back side of the front panel. However, there is a problem that the arrangement positions of operation buttons and the like provided in the playback device are limited.
In some cases, the ribs 104, 105, 106 and the like are integrally formed with the front panel using a synthetic resin or the like, but the conventional insertion port structure increases the number of parts constituting the insertion port. Therefore, the shape of the mold for forming the front panel becomes complicated, and it takes time to manufacture the mold, and the sink at the time of molding the front panel (the dent generated when the resin hardens and shrinks) occurs. There was a problem that it became easier.
Further, when the rotating shaft 102 is fitted to the rib 104, it is necessary to flex the rib 104 and the rotating shaft 102 elastically, so that there is a problem that workability is poor.
[0004]
In view of the above problems, an object of the present invention is to provide a cassette insertion slot structure with a small number of parts and easy to manufacture.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, the cassette insertion slot structure according to claim 1 opens and closes the guide member (30) for guiding the cassette (MD60) containing the recording medium into the apparatus and the cassette insertion slot of the apparatus. A cassette insertion slot structure including a rotatable flap (20), and a bearing hole (32) for rotatably supporting a rotation shaft (21) of the flap on the guide member, A slit (31) extending from the back side of the guide member to the bearing hole is formed, and a part of the bearing hole is formed on the inner surface of the slit at the end of the slit on the bearing hole side. Forming a protrusion (33), forming an opening (34) in the vicinity of the protrusion on the guide member, and contacting the rotation shaft with the contact hole (21a) contacting the bearing hole; Bearing hole A movement restricting means (flap support portion 21b) having a larger diameter, the slit having a width larger than the diameter of the abutting portion, and between the apex portion of the protrusion and the inner surface on the opposite side of the slit. And the movement restricting means restricts the movement of the rotary shaft relative to the slit in the axial direction, and the movement of the rotary shaft along the slit is restricted by the protrusion. It is characterized by being regulated by the part .
[0006]
According to the cassette insertion slot structure of claim 1, the insertion slot (10) is roughly constituted by the guide member and the flap, that is, the number of parts constituting the insertion slot is reduced, and the structure of the insertion slot is simplified. Can be anything.
In addition, since the structure of the insertion opening is simplified, it is possible to reduce the time required for producing a mold used for forming the insertion opening, and it is possible to suppress sink marks generated during the formation of the insertion opening.
Further, when the rotating shaft is fitted into the bearing hole, the rotating shaft only needs to be moved from the back side of the guide member through the slit to the bearing hole, so that workability is improved.
Further, the rotation shaft itself is provided with a movement restricting means for restricting the movement of the rotation shaft in the longitudinal direction. That is, the rotation shaft itself has a function of positioning the rotation shaft, so that a member for restricting the movement of the rotation shaft in the left-right direction, which is conventionally provided on the left and right sides of the insertion port, is not necessary. The space on the left and right sides of the insertion slot can be used effectively.
Further, by providing an opening and a protrusion in the vicinity of the bearing hole, when the rotary shaft is fitted into the bearing hole, the inner surface portion of the slit that comes into contact with the rotary shaft moves elastically to the opening. The fitting operation is facilitated and the movement of the rotating shaft along the slit is restricted.
[0009]
The cassette insertion slot structure according to claim 2 is the cassette insertion slot structure according to claim 1 , wherein the slits are formed substantially in parallel along the cassette insertion direction from the back side of the guide member. The first slit (31a) and the second slit (31b) formed so as to extend from the end of the first slit to the bearing hole substantially perpendicular to the cassette insertion direction. The means is characterized in that the diameter is larger than that of the contact portion .
[0010]
According to the cassette insertion opening structure of the third aspect, the same effect as in the first or second aspect can be obtained, and the movement restricting means has a part of the rotation shaft larger in diameter than the bearing hole. It is the formed part. That is, the movement of the rotating shaft is restricted by the side surface (21b ′) of the movement restricting means, which is a part of the rotating shaft, coming into contact with the side surface (30a) of the guide member. Therefore, the movement restricting means can be easily formed.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the cassette insertion slot structure according to the present embodiment will be described with reference to the drawings. In the present embodiment, an MD is used as a cassette for storing a recording medium. Moreover, let the X-axis direction shown in FIGS. 1-3 be the front-back direction, and let the Y-axis direction be the left-right direction. The MD 60 is inserted in the positive direction of the X axis.
[0012]
As shown in FIGS. 1 to 3, the cassette insertion slot 10 is generally configured by a flap 20 and a guide member 30.
[0013]
The flap 20 is a substantially rectangular thin plate made of, for example, metal or synthetic resin, and is provided inside the guide member 30 to open and close the MD insertion slot 11.
The flap 20 includes a rotation shaft 21 at an upper edge portion thereof.
[0014]
The rotating shaft 21 is a rod-shaped body made of metal, synthetic resin, or the like, and supports the flap 20 and is rotatably supported by bearing holes 32 described later at both ends thereof.
As shown in FIG. 1, a spring 40 (tensile spring) is used to bias the flap 20 in the closing direction. One end of the spring 40 is hooked on a spring locking portion 22 provided on the rotary shaft 21, and the other end is hooked on, for example, an MD reproducing apparatus main body.
Accordingly, the flap 20 closes the MD insertion slot 11 in accordance with the urging force of the spring 40 except during normal time, that is, when the MD 60 is inserted and discharged. At the time of MD insertion / ejection, the flap 20 is pressed by the MD 60 to rotate in an arc shape around the rotation shaft 21, thereby opening the MD insertion port 11.
[0015]
Moreover, the rotating shaft 21 is provided with the contact part 21a and the flap support part 21b, as shown in FIG.
The abutting portion 21a is a member that partially abuts on a bearing hole 32 described later, and the diameter D1 of the corresponding abutting portion 21a is formed to be smaller than the diameter D2 of the bearing hole 32.
The flap support portion 21b is a member used as a movement restricting means for supporting the flap 20 and restricting the movement of the rotation shaft in the left-right direction. The diameter D3 of the flap support portion 21b is larger than the diameter D2 of the bearing hole 32. It is formed to be large.
And the contact part 21a is extended and provided from the left-right both sides | surfaces 21b 'of the flap support part 21b.
[0016]
The guide member 30 is integrally formed with a front panel 50 (see FIG. 2) of the MD reproducing apparatus in a substantially square frame shape by using a synthetic resin such as plastic, for example. The guide member 30 is formed so that its inner dimension is slightly larger than the outer dimension of the MD 60, and is provided extending rearward in a state of surrounding the MD insertion slot 11 of the front panel 50. Therefore, when the MD 60 is inserted, the MD 60 is positioned in the vertical and horizontal directions by the guide member 30 and has the effect of being accurately guided into the apparatus.
[0017]
A slit 31, a bearing hole 32, a protrusion 33, and an opening 34 are provided on each of the left and right side surfaces of the guide member 30 (hereinafter referred to as “guide member side surface 30a”).
The slit 31 is provided so as to be substantially L-shaped when viewed from the side. Here, of the substantially L-shaped slit 31, a portion provided in parallel to the front-rear direction is defined as a first slit 31 a, upward from the front end of the first slit 31 a, in the front-rear direction. A portion provided in a direction substantially orthogonal to the second slit 31b is a second slit 31b.
[0018]
The first slit 31a is provided at the lower edge portion of the guide member side surface 30a, and the rear portion thereof reaches the rear surface side of the guide member side surface 30a.
The second slit 31b is provided upward from the front end portion of the first slit 31a to the upper edge portion of the guide member side surface 30a.
The first slit width B1 and the second slit width B2 (FIG. 2) so that the rotary shaft 21 can pass through the slit 31 when the rotary shaft 21 is fitted into a bearing hole 32 described later. Is larger than the diameter D1 of the abutting portion 21a of the rotating shaft.
[0019]
The bearing hole 32 is provided at the upper end portion of the second slit 31b to support the rotary shaft 21 so as to be rotatable. The bearing hole 32 is roughly formed from an upper end portion of the second slit 31b and an upper portion of a protrusion 33 described later, and a part of the lower side of the bearing hole 32 is opened. Further, as described above, the diameter D2 of the bearing hole 32 is larger than the diameter D1 of the abutting portion 21a of the rotating shaft and smaller than the diameter D3 of the flap support portion 21b.
Therefore, in the state where the rotating shaft 21 is supported by the bearing hole 32, the movement of the rotating shaft 21 in the left-right direction is restricted by the side surface 21b 'of the flap support portion 21b coming into contact with the inner surface of the guide member side surface 30a. Will be.
[0020]
The protrusion 33 forms a part of a later-described bearing hole 32 at the upper end portion of the second slit 31b, and is provided to restrict the downward movement of the rotary shaft 21. In the present embodiment, the projection 33 is provided on the front inner surface of the two front and rear inner surfaces of the second slit 31b.
Note that the width B3 (see FIG. 2) of the gap formed between the apex portion of the protrusion 33 and the rear inner surface of the second slit 31b is relative to the diameter D1 of the abutting portion 21a of the rotating shaft. Keep it slightly smaller.
[0021]
The opening 34 is formed in a substantially rectangular shape, and is provided behind the second slit 31 b and in the vicinity of the protrusion 33. By providing the opening 34, when the rotary shaft 21 is fitted into the bearing hole 32, the inner surface portion of the second slit 31b that comes into contact with the rotary shaft 21 is elastic in the direction of widening the width B3 of the gap. The fitting operation is facilitated.
[0022]
Next, a procedure for fitting the rotating shaft 21 into the bearing hole 32 will be described.
First, the rotating shaft 21 integrated with the flap 20 is inserted into the first slit 31a from the rear end side of the first slit 31a.
Then, the abutting portion 21a of the rotating shaft is brought into contact with the apex portion of the protrusion 33 and the inner surface of the rear side of the second slit 31b.
[0023]
When the rotating shaft 21 is further moved upward from this state, the inner surface portion of the second slit 31b that is in contact with the rotating shaft 21 is elastically moved rearward. By this movement, the width B3 of the gap temporarily becomes larger than the diameter D1 of the contact portion 21a of the rotary shaft, so that the rotary shaft 21 can pass through the gap portion.
Then, by further moving the rotary shaft 21 upward, the rotary shaft 21 is fitted into the bearing hole 32 and the operation is completed.
[0024]
According to the insertion slot structure of the cassette according to the present embodiment, the insertion slot 10 is roughly constituted by the flap 20 and the guide member 30, that is, the number of parts constituting the insertion slot 10 is reduced, and the insertion slot 10 The structure can be simplified.
In addition, since the structure of the insertion slot 10 is simplified, the time required to manufacture a mold used for molding the insertion slot 10 can be reduced, and sink marks generated when the insertion slot 10 is molded can be suppressed. it can.
[0025]
Further, when the rotating shaft 21 is fitted into the bearing hole 32, the rotating shaft 21 only needs to be moved from the back side of the guide member 30 to the bearing hole 32 through the slit 31, so that workability is improved.
Further, as described above, since the diameter D3 of the flap support portion 21b of the rotating shaft is larger than the diameter D2 of the bearing hole 32, the movement of the rotating shaft 21 in the left-right direction is restricted. That is, the rotating shaft itself has a function of regulating the positioning by restricting the movement of the rotating shaft in the left-right direction. Therefore, a member for restricting the movement of the rotation shaft in the left-right direction, which has been conventionally provided on the left-right side of the insertion port, is not necessary, and the space on the left-right side of the insertion port 10 can be used effectively. In addition, since the positioning of the rotating shaft in the left-right direction is performed at a shorter distance (span) compared to the conventional case, the component dimensional tolerance required when manufacturing the rotating shaft 21 and the flap 20 can be further reduced. The rotating shaft 21 and the flap 20 with little dimensional error can be manufactured.
[0026]
In addition, although this Embodiment demonstrated the insertion slot structure of MD, it is not limited to this, For example, it can apply also to the insertion slot structure of a video deck, etc.
Further, although the front panel 50 and the guide member 30 are integrally formed, the front panel 50 and the guide member 30 may be manufactured separately and joined together in subsequent steps.
Moreover, you may shape | mold the flap 20 and the rotating shaft 21 integrally.
Further, the diameter D3 of the flap support portion 21b of the rotating shaft is made larger than the diameter D2 of the bearing hole 32. However, the present invention is not limited to this, and for example, the rotating shaft has the same diameter over the entire length direction. Protrusions are provided on the left and right ends of the shaft. And it is good also as what regulates the movement to the left-right direction of the rotating shaft 21 by this protrusion contacting the guide member side surface 30a.
[0027]
The protrusion 33 may be provided on the rear inner surface of the two front and rear inner surfaces of the second slit 31b, and the opening 34 may be provided on the front side of the second slit 31b.
Further, the urging method for urging the flap 20 in the closing direction is not limited to the method using the tension spring 40 and the spring locking portion 22 shown in the present embodiment. It is assumed that a well-known energizing method such as a method of using is used.
[0028]
【The invention's effect】
According to the cassette insertion slot structure of claim 1, the insertion slot is roughly constituted by the guide member and the flap, that is, the number of parts constituting the insertion slot is reduced, and the structure of the insertion slot is simplified. it can.
In addition, since the structure of the insertion port is simplified, it is possible to reduce the time required to manufacture a mold used for forming the insertion port, and it is possible to suppress sink marks generated when the insertion port is formed.
Further, when the rotating shaft is fitted into the bearing hole, the rotating shaft only needs to be moved from the back side of the guide member through the slit to the bearing hole, so that workability is improved.
In addition, since the rotation shaft itself has a function of positioning the rotation shaft, a member for restricting the movement of the rotation shaft in the left-right direction, which is conventionally provided on the left and right sides of the insertion port, is no longer necessary. The space on the left and right sides of the insertion slot can be used effectively.
[0029]
Further, by providing an opening in the vicinity of the bearing hole, when the rotary shaft is fitted into the bearing hole, the inner surface portion of the slit that comes into contact with the rotary shaft moves elastically to the opening. Work becomes easier.
[0030]
According to the insertion port structure according to claim 2, wherein the cassette, together with achieving the same effects as claim 1, the side surface of the movement restricting means is part of a rotary shaft (21b ') is, the guide member side surface (30a ) Is restricted from moving the rotary shaft. Therefore, the movement restricting means can be easily formed.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an insertion slot structure of a cassette according to an embodiment.
FIG. 2 is a side view showing a cassette insertion slot structure according to the present embodiment.
FIG. 3 is a perspective view of a main part showing a cassette insertion slot structure according to the present embodiment.
FIG. 4 is a perspective view showing a conventional MD insertion slot structure.
[Explanation of symbols]
11 Cassette insertion slot (MD insertion slot)
20 Flap 21 Rotating shaft 30 Guide member 31 Slit 31a First slit 31b Second slit 32 Bearing hole 33 Projection 34 Opening 60 Cassette (MD)

Claims (2)

A cassette insertion slot structure comprising a guide member that guides a cassette containing a recording medium into the apparatus, and a rotatable flap that opens and closes the cassette insertion slot of the apparatus.
The guide member is formed with a bearing hole that rotatably supports a rotation shaft included in the flap, and a slit that extends from the back side of the guide member to the bearing hole,
On the inner surface of the slit at the end of the slit on the bearing hole side, a protrusion is formed that forms a part of the bearing hole.
Forming an opening in the vicinity of the protrusion in the guide member;
The rotating shaft is provided with an abutting portion that abuts on the bearing hole, and a movement restricting means having a diameter larger than that of the bearing hole.
The width of the slit is larger than the diameter of the contact portion, and the width of the gap generated between the apex portion of the protrusion and the inner surface on the opposite side of the slit is smaller than the diameter of the contact portion,
Restricting movement in the axial direction of the rotary shaft relative to the slit by the movement restricting means ,
The cassette insertion slot structure is characterized in that movement of the rotating shaft along the slit is restricted by the protrusion . The cassette insertion slot structure according to claim 1,
  The slit includes a first slit formed substantially parallel to the insertion direction of the cassette from the back side of the guide member, and an end of the first slit to the bearing hole substantially perpendicular to the cassette insertion direction. With a second slit formed to reach
  The cassette insertion slot structure, wherein the movement restricting means has a diameter larger than that of the contact portion.

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