JP2006302397A - Opening and closing detection mechanism of lid of insertion port of unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an opening and closing detection mechanism of a lid of an insertion port of a unit, which has structure capable of reducing a limit in the thinning of equipment and a limit in utilizing a space of a side opposite to the insertion port which is to be opened and closed by the lid across supporting shafts as much as possible. <P>SOLUTION: The opening and closing detection mechanism of the lid 21 of the insertion port 11 of the unit opens and closes the insertion port 11 by swinging centering on supporting shafts 22a, 22b, and is constituted such that it has a cam member 30 which is fixed at the end of the supporting shaft 22a and whose face of the outer side of the extended direction of the shaft 22a becomes a cam face 31 and a detecting switch 50, wherein the detecting switch 50 is arranged so that a movable part 51 is abutted on the cam face 31 of the cam member 30, and the cam face 31 has a shape for moving the movable part 51 of the detecting switch 50 between a first position and a second position when the cam member 30 is turned by the turning of the supporting shaft 22 with the swing of the lid 21 between the closing and the opening of the insertion port 11. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an opening / closing detection mechanism for a door plate provided at an insertion opening of a unit body formed on a front panel or the like of a device using a unit body such as a card-like, cassette-like, or disk-like recording medium or a PC card.

  Conventionally, it is provided at the insertion slot of the video cassette (unit body) formed on the front panel of the video deck, and opens and closes the insertion slot following the insertion of the video cassette into the insertion slot and the withdrawal from the insertion slot. A lid (door plate) open / close detection mechanism has been proposed (see, for example, Patent Document 1). The conventional lid opening / closing detection mechanism of the video cassette insertion slot is configured as shown in FIG.

  In FIG. 12, the front panel 2 is fixed to the front end of the cabinet 1 of the video deck, and an insertion port 2 </ b> A is formed at a predetermined portion of the front panel 2. On the back side of the front panel 2, a lid (door plate) 3 supported so as to be swingable about the support shaft 3A is provided. The lid 3 opens and closes the insertion port 2A by swinging around the support shaft 3A following the pushing of the video cassette 5 into the insertion port 2A and withdrawing from the insertion port 2A.

  A limit switch 4 is provided on the inner surface of the top plate of the cabinet 1. When the video cassette 5 is pushed into the insertion slot 2A, the lid swings and the insertion slot 2A is opened, the limit switch 4 is installed at the position of the limit switch 4 operating element 4A (movable lever). ) Is pressed. The operating element 4A of the limit switch 4 is normally in the first position (OFF position), and is moved to the second position (ON position) when pressed by the lid 3.

In such a door cassette opening / closing detection mechanism of the video cassette insertion slot, the lid 3 is closing the insertion slot 2A when the operation element 4A of the limit switch 4 is in the first position (OFF position). When the operation element 4A of the limit switch 4 is in the second position (ON position), it can be detected that the lid 3 is in a state of opening the insertion port 2A.
Japanese Patent Laid-Open No. 11-86378

  However, in such a conventional lid 3 opening / closing detection mechanism, the limit switch 4 is provided on the outer side of the lid 3 with the insertion port 2A opened, and therefore the lid 3 should be opened / closed with the support shaft 3A interposed therebetween. A useless space (see L in FIG. 12) corresponding to the installation space of the limit switch 4 is generated on the opposite side of the insertion port 2A. For this reason, thinning of the device (video deck) is restricted, and use of the space for other purposes is restricted.

  The present invention has been made to solve such a conventional problem, and restricts the thinning of the device and the use of the space on the side opposite to the insertion opening where the door plate should be opened and closed with the support shaft interposed therebetween as much as possible. The present invention provides a door plate open / close detection mechanism for a unit body insertion opening that can be reduced in structure.

  The opening / closing detection mechanism for the door plate of the unit body insertion port according to the present invention is provided at the insertion port of the unit body and pivots the support shaft following the pushing of the unit body into the insertion port and withdrawing from the insertion port. A door plate opening / closing detection mechanism that opens and closes the insertion port by swinging, and is a cam member that is fixed to an end portion of the support shaft, and an outer surface in the extension direction of the support shaft serves as a cam surface And a detection switch that includes a movable part that moves between a first position and a second position, and that can take a detection state corresponding to each of the first position and the second position of the movable part, The switch is arranged so that the movable portion abuts against the cam surface of the cam member, and the cam surface is supported by the swinging of the door plate between closing and opening of the insertion port. The cam member rotates by rotating The movable portion of the detecting switches a configuration having a shape to move between the first position and the second position when that.

  With such a configuration, when the cam member rotates due to the rotation of the support shaft of the door plate due to the swinging of the door plate between the closing and opening of the insertion port, the cam member contacts the cam surface of the cam member. The movable part of the detection switch moves between the first position and the second position. Therefore, it is possible to detect either the state in which the door plate closes the insertion port or the state in which the door plate is opened based on the detection state of the detection switch corresponding to either the first position or the second position of the movable part.

  Since the cam member provided at the end of the support shaft of the door plate has a cam surface on the outer side in the extension direction of the support shaft, the detection switch in which the movable part contacts the cam surface is greatly separated from the extension direction of the support shaft. It will be possible to arrange without.

  The shape of the unit body is not particularly limited. For example, the unit body may be any of a card shape, a cassette shape, and a disk shape, and its function is not particularly limited. For example, a CD, MD, cassette It may be a recording medium such as a tape, a video tape, a memory card, or a communication card or a PC card.

  Further, in the opening / closing detection mechanism for the door plate of the unit body insertion port according to the present invention, the cam surface rotates the support shaft accompanying the swinging of the door plate between the closing and opening of the insertion port. Thus, the cam member can be configured to be displaced in the axial direction of the support shaft when the cam member rotates.

  With such a configuration, when the cam member is rotated by the rotation of the support shaft caused by the swing of the door plate between the closing and opening of the insertion port, the movable portion that comes into contact with the cam surface is substantially the support. The detection switch can be arranged to move in the axial direction of the shaft. Therefore, the detection switch can be brought closer to the axis of the support shaft.

  In the opening / closing detection mechanism for the door plate of the unit body insertion port according to the present invention, the movable portion of the detection switch swings between the first position and the second position about one end portion. It can be set as the structure which has a lever.

  With such a configuration, when the cam member rotates due to the rotation of the support shaft of the door plate due to the swinging of the door plate between the closing and opening of the insertion port, the cam member contacts the cam surface of the cam member. The lever of the detection switch swings between the first position and the second position around one end.

  Furthermore, the door body opening / closing detection mechanism of the unit body insertion port according to the present invention may be configured such that the detection switch is disposed so that the swing locus surface of the lever is substantially parallel to the insertion port. it can.

  With such a configuration, the swing locus surface of the lever of the detection switch that swings between the first position and the second position around the one end is closed and opened by the door plate. Since it is substantially horizontal to the opening, it is not necessary to secure a swinging space for the lever of the detection switch in a direction crossing the support shaft of the door plate that opens and closes the insertion opening.

  According to the door plate opening / closing detection mechanism of the unit body insertion port according to the present invention, the cam member provided at the end of the support shaft of the door plate has a cam surface on the outside in the extension direction of the support shaft. Since the detection switch with which the movable part comes into contact with the cam surface can be arranged without greatly separating from the extending direction of the support shaft, it is possible to limit the thinning of the device using the unit body and sandwich the support shaft. The use restriction on the side opposite to the insertion port where the door plate should be opened and closed can be minimized.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  The opening / closing detection mechanism for the door plate of the unit body insertion opening according to the embodiment of the present invention can be applied to, for example, an in-vehicle audio navigation device. The front panel of this audio navigation apparatus is configured as shown in FIG.

  In FIG. 1, a card insertion slot 11 is formed at a predetermined portion near the upper edge of the front panel 10. The card insertion slot 11 follows the insertion of the PC card (unit body) into the card insertion slot 11 and the withdrawal from the card insertion slot 11 (the insertion and withdrawal in the direction perpendicular to the paper surface). A door plate 21 that opens and closes is provided. A CD insertion slot 12 is formed in the lower vicinity of the card insertion slot 11, and a DVD insertion slot 13 is formed in the lower vicinity of the CD insertion slot 12. Although not shown, a display panel that can be opened and closed is provided on the front surface of the front panel 10, and the front panel 10 is exposed when the display panel is opened.

  The door plate 21 of the card insertion slot 11 is a part of a door assembly 20 as shown in FIG. The door assembly 20 includes a door plate 21, two support shafts 22 a and 22 b provided along the lower edge of the door plate 21, and a stopper piece 23 formed at a predetermined portion of the upper edge of the door plate 21. is doing. The two support shafts 22a and 22b are arranged so as to have the same axis, and a cam member 30 having a cam surface 31 as described later is provided at the end of one of the support shafts 22a.

  Such a door assembly 20 is attached to the back surface of the display panel 10 as shown in FIG. In FIG. 3, two support portions 14a and 14b are formed at predetermined intervals below the card insertion slot 11 with a predetermined interval. The support portion 14a rotatably supports the support shaft 22a, and the support portion 14b The support shaft 22b is rotatably supported. As a result, the door plate 21 can swing around the support shafts 22a and 22b.

  A coiled spring 25 is wound around the end of the support shaft 22a opposite to the end where the cam member 30 is provided. One end of the spring 25 is locked to the back surface of the door plate 21, and the other end (not shown) is locked to the back surface of the front panel 10. Due to the torsional force of the spring 25, the door plate 21 that can swing about the support shafts 22 a and 22 b is urged toward the card insertion slot 11, and the stopper piece 23 abuts against the back surface of the front panel 10. As a result, the door plate 21 closes the card insertion slot 11.

  A stopper protrusion 24 is formed at a predetermined portion of the support shaft 22a, and a restriction protrusion 15 is formed at the back surface portion of the front panel 10 corresponding to the stopper protrusion 24. As a result, the swing range of the door plate 21 with the support shafts 22a and 22b as the axes is such that the stopper protrusion 24 is restricted from the position where the stopper piece 23 abuts against the back surface of the front panel 10 (the card insertion slot 11 is closed). It is restricted to a range up to a position where it abuts against the protrusion 15 (open state of the card insertion slot 11).

  Further, as shown in FIGS. 4 to 6, the circuit board 40 is attached to the rear surface of the front panel 10 so as to be substantially parallel to the rear surface of the front panel 10 adjacent to the card insertion slot 11 (door assembly 20). It is done. The circuit board 40 has a portion extending toward the cam member 30 provided at the end of the support shaft 22a of the door plate 21, and the detection switch 50 is attached to the portion. The detection switch 50 has a lever 51 (movable part) that swings between an off position (release position: first position) and an on position (pressing position: second position) around one end. The detection state corresponding to each of the off position and the on position of the lever 51 can be taken.

  The relative positional relationship between the cam member 30 and the detection switch 50 and the shape of the cam surface 31 of the cam member 30 will be described in detail.

  As shown in FIG. 2, the cam member 30 has a cam surface 31 on the outer surface in the extending direction of the support shaft 22 a. As shown in FIG. 7, the detection switch 50 is arranged so that the lever 51 contacts the cam surface 31. Further, when viewed from the extending direction of the support shaft 22a, as shown in FIGS. 8A and 8B, the main body of the detection switch 50 is substantially parallel to the card insertion slot 11 opened and closed by the door plate 21. Yes. As a result, the swing locus surface of the lever 51 of the detection switch 50 that swings between the OFF position and the ON position (the surface substantially perpendicular to the paper surface in FIGS. 8A and 8B) is the card insertion slot. 11 and approximately parallel.

  As shown in FIGS. 9A and 9B, the cam surface 31 has an inclined surface, and the card insertion slot 11 is closed (see FIG. 9A) and opened (see FIG. 9B). When the cam member 30 is rotated by the rotation of the support shaft 22a accompanying the swinging of the door plate 21 between the two, the axial direction of the support shaft 22a (the left-right direction in FIG. 9) projects to the detection switch 50 side, Further, the shape is displaced so as to return. In a state where the door plate 21 closes the card insertion slot 11 (see FIG. 9A), the lever 51 of the detection switch 50 is in the off position and is in contact with the edge of the cam surface 31. When the door plate 21 swings so as to open the card insertion slot 11, the lever 51 of the detection switch 50 comes into contact with the cam surface 31 protruding to the detection switch 50 side in the axial direction of the support shaft 22a. It is pushed while maintaining the above state to reach the ON position (see FIG. 9B). Further, when the door plate 21 returns from the state of opening the card insertion slot 11 (see FIG. 9B) to the state of closing (see FIG. 9A), the lever 51 of the detection switch 50 is moved to the support shaft 22. The state of abutment with the cam surface 31 that returns from the state of projecting toward the detection switch 50 in the axial direction to the original state is reached, and the OFF position is reached.

  Further, when the cam member 30 is rotated by the rotation of the support shaft 22a accompanying the swing of the door plate 21 between the closing and opening of the card insertion slot 11, the lever 51 of the detection switch 50 is moved as shown in FIG. Are slid on the first effective cam surface 31a (shaded portion of the angle range A) and the second effective cam surface 31b (shaded portion of the angle range B) of the cam surface 31 shown in FIG. Swings between. While the lever 51 is sliding on the first effective cam surface 31a, the detection switch 50 is turned off (SW OFF), and while the lever 51 is sliding on the second effective cam surface 31b, the detection switch 50 is turned on. Turns on (SW ON).

  In the audio navigation apparatus having the door plate 21 open / close detection mechanism as described above, the door plate 21 is detected as follows.

  When the PC card is not inserted into the card insertion slot 11, the door plate 21 urged toward the card insertion slot 11 by the torsional force of the spring 25 is in a state where the stopper piece 23 is abutted against the back surface of the front panel 10. Then, the card insertion slot 11 is closed (see FIGS. 3 to 6 and FIG. 8A). At this time, the lever 51 of the detection switch 50 is in the off position (see FIG. 9A) in contact with the first effective cam surface 31a (see FIG. 10) of the cam surface 31 of the cam member 30, and the detection switch 50. Turns off (SW OFF). It can be detected that the door plate 21 closes the card insertion slot 11 by the OFF state (SW OFF) of the detection switch 50.

  When the PC card is pushed into the card insertion slot 11 while pushing the door plate 21, the door plate 21 follows the pushing of the PC card into the card insertion slot 11 and the front panel 10 is centered on the support shafts 22a and 22b. Swing inside. Then, as shown in FIG. 11, the stopper projection 24 formed on the support shaft 22a hits the regulation projection 15, and the door plate 21 completely opens the card insertion slot 11 (see FIG. 8B). .

  Thus, when the door plate 21 swings inside the front panel 10 to open the card insertion slot 11, the cam member 30 rotates due to the rotation of the support shaft 22a accompanying the swing of the door plate 21. The lever 51 of the detection switch 50 slides on the first effective cam surface 31a of the cam surface 31 protruding to the detection switch 50 side, moves to the second effective cam surface 31b (see FIG. 10), and reaches the ON position. (See FIG. 9B). Accordingly, the detection switch 50 is turned on (SW ON), and it can be detected that the door plate 21 has opened the card insertion slot 11 by the detection switch 50 being turned on (SW ON).

  When the PC card inserted into the card insertion slot 11 is pulled out, the door plate 21 biased by the spring 25 follows the drawer of the PC card, and the card insertion slot about the support shafts 22a and 22b. Swing to the 11 side. Then, the stopper piece 23 abuts against the back surface of the front panel 10 and the door plate 21 closes the card insertion slot 11 (see FIGS. 3 to 6 and FIG. 8A).

  Thus, when the door plate 21 swings toward the card insertion slot 10 and closes the card insertion slot 11, the cam member 30 rotates due to the rotation of the support shaft 22a accompanying the swing of the door plate 21. The lever 51 of the detection switch 50 slides on the second effective cam surface 31b of the cam surface 31 that returns from the overhanging state as described above to the first effective cam surface 31a (see FIG. 10), and is turned off. Return to the position (see FIG. 9A). Accordingly, the detection switch 50 is turned off (SW OFF), and it can be detected that the door plate 21 closes the card insertion slot 11 by the detection switch 50 being turned off (SW OFF).

  According to the opening / closing detection mechanism of the door plate 21 as described above, the cam member 30 provided at the end of the support shaft 22a has the cam surface 31 on the outer side in the extending direction of the support shaft 22a (FIGS. 2 and 2). 7, FIG. 8, and FIG. 9), the detection switch 50 with which the lever 51 comes into contact with the cam surface 31 can be arranged without greatly separating from the extending direction of the support shaft 22a. That is, the detection switch 50 can be disposed closer to the axis of the support shaft 22a. Therefore, the lower part of the support shafts 22a and 22b of the door plate 21 (the downward direction in FIGS. 5 and 6), that is, the door plate 21 on the opposite side of the card insertion slot 11 to be opened and closed with the support shafts 22a and 22b interposed therebetween. For example, the CD insertion slot 12 can be formed closer to the card insertion slot 11. In addition, the audio navigation device can be made thinner.

  Further, the cam surface 31 is rotated by the rotation of the support shaft 22a by the swing of the door plate 21 between the closing (see FIG. 9A) and the opening (see FIG. 9B) of the card insertion slot 11. Since the cam member 30 has a shape that protrudes toward the detection switch 50 in the axial direction of the support shaft 22a and is displaced so as to return when the cam member 30 rotates, the detection switch 50 is further moved to the axis of the support shafts 22a and 22b. You can get closer. Accordingly, it is possible to further reduce the use restriction of the space on the opposite side of the card insertion slot 11 where the door body should be opened and closed with the support shafts 22a and 22b interposed therebetween.

  Further, the main body of the detection switch 50 is disposed substantially parallel to the card insertion slot 11 formed in the front panel 10, and the swing locus surface of the lever 51 of the detection switch 50 is substantially parallel to the card insertion slot 11. (See FIG. 8), it is not necessary to secure a swinging space for the lever 51 in the direction intersecting the front panel 10 (direction intersecting the support shafts 22a and 22b), and the audio navigation device can be saved in the depth direction. Space becomes possible.

  In the above-described example, the opening / closing detection mechanism of the door plate 21 that opens and closes the card insertion slot 11 serving as the insertion slot of the PC card has been described. However, the present invention is not limited to this, and any shape (for example, a card shape) The present invention can be applied to a door plate opening / closing mechanism for opening / closing an insertion port of a unit body of a cassette shape, a disk shape, or the like.

  In addition, the detection switch 50 has a structure including the lever 51. However, the detection switch 50 may have an arbitrary structure as long as it has a movable portion that can move between the first position and the second position. it can.

  As described above, the opening / closing detection mechanism for the door plate of the unit body insertion port according to the present invention has a limitation on the thinning of the device and the space on the opposite side of the insertion port that the door plate should open / close across the support shaft. The insertion slot of the unit body formed on the front panel of an apparatus that has the effect of minimizing usage restrictions as much as possible and that uses a unit body such as a card-like, cassette-like, or disk-like recording medium or PC card. It is useful as an opening / closing detection mechanism for a door plate provided in the door.

It is a front view which shows the surface external appearance of the front panel of the apparatus provided with the opening / closing detection mechanism of the door plate of the recording medium insertion opening which concerns on one Embodiment of this invention. It is a perspective view which shows the structure of a door assembly. It is a perspective view which shows the back surface of the front panel with which the door assembly was attached. It is a perspective view of the back surface of a front panel which shows the arrangement | positioning relationship of a detection switch in the state which a door plate closes a card insertion slot. It is a front view of the back surface of the front panel showing the arrangement relationship of the detection switch in a state where the door plate closes the card insertion slot. It is a front enlarged view of the front panel back surface which shows the arrangement | positioning relationship of a detection switch in the state which a door plate closes a card insertion slot. It is a disassembled perspective view which shows the relative positional relationship of the cam member and detection switch which were provided in the support shaft. It is a side view which shows the relative positional relationship of the cam member provided in the support shaft, and a detection switch. It is a front view which shows the relative positional relationship of the cam surface of the cam member provided in the support shaft, and the lever of a detection switch. It is a figure which shows the part of the cam surface which the lever of a detection switch contacts. It is a fragmentary perspective view of the back surface of a front panel in a state where a door plate opens a card insertion slot. It is a figure which shows the opening / closing detection mechanism of the conventional door plate.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Front panel 11 Card insertion slot 12 CD insertion slot 13 DVD insertion slot 14a, 14b Support part 15 Control protrusion 20 Door assembly 21 Door plate 22a, 22b Support shaft 23 Stopper piece 24 Stopper protrusion 25 Spring 30 Cam member 31 Cam surface 31a First 1 Effective cam surface 31b Second effective cam surface 40 Circuit board 50 Detection switch 51 Lever

Claims (4)

A door plate that is provided at an insertion port of the unit body and that opens and closes the insertion port by swinging around a support shaft following the insertion of the unit body into the insertion port and the drawing out of the insertion port. An open / close detection mechanism,
A cam member fixed to an end portion of the support shaft, and an outer surface in the extending direction of the support shaft is a cam surface;
A movable switch that moves between a first position and a second position, and a detection switch that can take a detection state corresponding to each of the first position and the second position of the movable section;
The detection switch is arranged so that the movable part abuts on the cam surface of the cam member,
The cam surface displaces the movable part of the detection switch when the cam member is rotated by the rotation of the support shaft accompanying the swing of the door plate between the closing and opening of the insertion port. An opening / closing detection mechanism for a door plate of a unit body insertion opening, which has a shape that is moved between a first position and a second position.   The cam surface is displaced in the axial direction of the support shaft when the cam member is rotated by the rotation of the support shaft accompanying the swing of the door plate between the closing and opening of the insertion port. An opening / closing detection mechanism for a door plate of a unit body insertion opening characterized by having a shape.   The unit body insertion port according to claim 1 or 2, wherein the movable portion of the detection switch includes a lever that swings between the first position and the second position about one end portion. Door plate open / close detection mechanism. 4. The opening / closing detection mechanism for a door plate of a unit body insertion port according to claim 3, wherein the detection switch is arranged so that a swing locus surface of the lever is substantially parallel to the insertion port.

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