JP2005194840A - Door opening/closing mechanism and electronic equipment having the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a door opening/closing mechanism which is improved in design and reliability of its operation, and to provide electronic equipment having the same. <P>SOLUTION: The door opening/closing mechanism has an arm body 25 which has one end thereof connected to a door body 2 and the other end thereof rotatably connected to a main body 3 of the electronic mechanism, and is rotated with respect to the main body to thereby move the door body with respect to the main body; a cam 34 which is moved in interlock with rotating operation of the arm body; an operating lever 51 which has an engaging portion 56 for slidably engaging with the cam, and is rotated according to an engaging location of the engaging portion with the cam; and a spring member 59 which energizes the operating lever in a direction in which the engaging portion is pressed to the cam. Then the cam has a blocking operating section 34a which applies a moving force to the door body in a direction from an opening position to a blocking position, generated by an energizing force of the spring member transmitted via the engaging portion of the operating lever. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a technical field of a door body opening / closing mechanism and an electronic apparatus including the door body opening / closing mechanism. More specifically, the present invention relates to a technical field for improving design and reliability of operation by applying a moving force toward a closed position to a door body using a cam and a spring member.

  Various electronic devices, for example, drive devices that handle various recording media such as disk-shaped recording media and tape cassettes, information processing devices such as personal computers, communication devices represented by telephones and facsimiles, PDAs (Personal Digital) Some information terminal devices such as Assistant) have a door body that is opened and closed between an open position and a closed position with respect to a main body in which predetermined parts are arranged.

  As an electronic apparatus including such a door body, for example, one end of the door body is rotatably supported by the front panel of the main body, and the recording medium formed on the front panel of the main body by rotating the door body There is a disk drive device that opens and closes the opening (see, for example, Patent Document 1).

Registered Utility Model No. 2519467

  By the way, the door body needs to be held at the closed position without causing backlash.

  Therefore, in some conventional electronic devices, a magnet is attached to one of the front panel and the door, and a metal piece made of a magnetic material attracted to the magnet is attached to the other.

  However, when magnets or metal pieces are attached to the front panel and door body, when the door body is opened, the magnet and metal pieces enter the user's field of view, resulting in a decrease in design. is there.

  Moreover, by using a magnet, the magnetic force may adversely affect each part arranged in the main body and the recording medium, or the holding force for holding the door body in the closed position may be reduced due to a decrease in magnetic force due to secular change.

  On the other hand, some conventional electronic devices have male and female catchers attached to the front panel and the door body in order to hold the door body in the closed position without rattling.

  However, when the catcher is attached to the front panel and the door, as in the case described above, there is a problem that when the door is opened, the catcher enters the user's field of view and the design is deteriorated. .

  In addition, the male catcher is particularly likely to protrude from the front panel or the door body. For example, the user may accidentally touch the catcher, and the catcher may be damaged.

  Accordingly, it is an object of the present invention to provide a door body opening / closing mechanism and an electronic apparatus equipped with the door body overcoming the above-described problems to improve design and operational reliability.

  In order to solve the above-described problems, the door body opening / closing mechanism of the present invention and the electronic apparatus including the door body are connected to the door body at one end and rotatably connected to the main body, and to the main body. An arm body that rotates and moves the door body with respect to the main body, a cam that is moved in conjunction with the rotation operation of the arm body, and an engagement portion that slidably engages with the cam and the cam And a spring member that urges the action lever in a direction in which the engagement portion is pressed against the cam. A closing action portion is provided that applies a moving force in a direction from the opening position to the closing position on the door body by the biasing force of the spring member transmitted through the joint portion.

  Therefore, in the door body opening / closing mechanism of the present invention and the electronic apparatus including the door body, the engaging portion of the action lever is pressed against the closing action portion of the cam by the spring member, so that the door body moves toward the closing position. The movement force of is given.

  The door body opening / closing mechanism of the present invention is a door body opening / closing mechanism that opens and closes a door body that is moved between an open position and a closed position with respect to the main body, one end of which is connected to the door body and the other end is the main body. An arm body that is pivotally connected to the main body and is rotated with respect to the main body to move the door body with respect to the main body, a cam that is moved in conjunction with the pivoting operation of the arm body, and a slide on the cam. An action lever that has an engagement part that is movably engaged and is rotated according to an engagement position of the engagement part with respect to the cam, and a spring that urges the action lever in a direction in which the engagement part is pressed against the cam A closing action portion that applies a moving force in the direction from the open position to the closing position on the door body by the biasing force of the spring member transmitted to the cam via the engaging portion of the action lever. It is formed.

  Accordingly, since the door body is held at the closed position by the biasing force of the spring member, there is no need for a magnet or a catcher for holding the door body at the closed position, and the design quality is lowered when these are provided. There is nothing.

  In addition, there is no need to worry about the adverse effects of the magnetic force of the magnet on each part arranged in the main body, and there is no problem of breakage of the catcher protruding from the door body.

  In the invention described in claim 2, the moving force in the direction from the closed position to the open position of the door body by the urging force of the spring member transmitted to the cam via the engaging portion of the action lever. Since the opening action | operation part which provides is formed, the door body can be reliably moved to an open position.

  In addition, since the closing action part and the opening action part are formed in the same cam, it is necessary to provide separate mechanisms for applying a moving force in the two directions of the closing position and the opening position to the door body. Therefore, the number of parts can be reduced.

  In the invention described in claim 3, since the closing action part and the opening action part of the cam are continuously formed, the movement of the door body is not stopped halfway, and the smoothness of the door body is achieved. A moving state can be secured.

  In the invention described in claim 4, since the cam is formed integrally with the arm body, the number of parts can be reduced.

  In the invention described in claim 5, since the rotatable shaft member is used as the engaging portion of the action lever, a smooth sliding operation with the cam is ensured, and the operation reliability is improved. Can be achieved.

  In the invention described in claim 6, since the stopper that holds the door body moved from the closed position to the open position in the open position is provided in the operating lever, it is necessary to provide a separate dedicated stopper. Therefore, the number of parts can be reduced.

  An electronic device having a door body opening / closing mechanism of the present invention is an electronic device having a door body opening / closing mechanism for opening / closing a door body that is moved between an open position and a closing position with respect to a main body, and one end portion of which is An arm body connected to the door body and the other end thereof being rotatably connected to the main body and rotating with respect to the main body to move the door body with respect to the main body, in conjunction with the turning operation of the arm body A cam to be moved; an engaging portion that is slidably engaged with the cam; and an operating lever that is rotated in accordance with an engaging position of the engaging portion with respect to the cam; A spring member that urges the cam in a direction to be pressed against the cam, and the urging force of the spring member that is transmitted to the cam via the engaging portion of the action lever moves the door body from the open position to the closed position. It is characterized in that a blocking action portion for imparting the moving force is formed.

  Accordingly, since the door body is held at the closed position by the biasing force of the spring member, there is no need for a magnet or a catcher for holding the door body at the closed position, and the design quality is lowered when these are provided. There is nothing.

  In addition, there is no need to worry about the adverse effects of the magnetic force of the magnet on each part arranged in the main body, and there is no problem of breakage of the catcher protruding from the door body.

  In the invention described in claim 8, the moving force in the direction from the closed position to the open position on the door body by the biasing force of the spring member transmitted to the cam via the engaging portion of the action lever. Since the opening action | operation part which provides is formed, the door body can be reliably moved to an open position.

  In addition, since the closing action part and the opening action part are formed in the same cam, it is necessary to provide separate mechanisms for applying a moving force in the two directions of the closing position and the opening position to the door body. Therefore, the number of parts can be reduced.

  In the invention described in claim 9, since the closing action part and the opening action part of the cam are continuously formed, the movement of the door body is not stopped halfway, and the smoothness of the door body is achieved. A moving state can be secured.

  In the invention described in claim 10, since the cam is formed integrally with the arm body, the number of parts can be reduced.

  In the invention described in claim 11, since the rotatable shaft member is used as the engaging portion of the action lever, a smooth sliding motion with the cam is ensured, and the operational reliability is improved. Can be achieved.

  In the invention described in claim 12, since the stopper that holds the door body moved from the closed position to the open position in the open position is provided in the action lever, it is necessary to provide a dedicated stopper separately. Therefore, the number of parts can be reduced.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS The best mode of a door body opening / closing mechanism and an electronic apparatus having the same according to the present invention will be described below with reference to the accompanying drawings. In the best mode shown below, the electronic device of the present invention is applied to a disk drive device that records and / or reproduces information signals with respect to a disk-shaped recording medium. The present invention is applied to a door body opening / closing mechanism provided in the drive device.

  Note that the scope of application of the present invention is not limited to the disk drive device and the door opening / closing mechanism provided thereto, and the electronic apparatus of the present invention can be used in various electronic devices such as tape cassettes other than disk-shaped recording media. Drive devices that handle various recording media, information processing devices such as personal computers, communication devices such as telephones and facsimiles, information terminal devices such as PDAs (Personal Digital Assistants), still cameras, electronic cameras, and video The door body opening / closing mechanism of the present invention can be widely applied to door devices opening / closing mechanisms provided in these various electronic devices and other devices and devices other than electronic devices. be able to.

  The electronic device (disk drive device) 1 includes a door body 2 and a main body 3 (see FIGS. 1 and 2).

  For example, the door body 2 is formed in a horizontally long rectangular shape using a metal material such as aluminum, and is moved between a closed position (see FIG. 1) and an open position (see FIG. 2) with respect to the main body 3 to be opened and closed. The The weight of the door body 2 is, for example, 500 g.

  On the back surface 2a of the door body 2, that is, the surface facing the front surface of the main body 3 at the closed position, concave portions 2b and 2b are formed at both left and right ends (see FIG. 3). Two support shaft members 4, 4,... Extending in the left-right direction are disposed in the recesses 2b, 2b, respectively, and the support shaft members 4, 4,... Are fitted in the recesses 2b, 2b. The pressing members 5 and 5 attached to the door body 2 prevent the dropout from the door body 2.

  The main body 2 is formed by arranging required parts on a housing 6 (see FIGS. 1 and 2). The housing 6 is formed in a horizontally long box shape, and the length in the left-right direction is the same as that of the door body 2. The front surface portion of the housing 6 is provided as a front panel 7, and the front panel 7 includes an opening / closing surface portion 7a positioned on the upper side and an exposed surface portion 7b positioned on the lower side of the opening / closing surface portion 7a.

  The opening / closing surface portion 7a is a portion facing when the door body 2 is in the closed position. The front surface of the open / close surface portion 7a is located behind the front surface of the exposed surface portion 7b by the step portion 8 formed at the continuous portion of the open / close surface portion 7a and the exposed surface portion 7b (see FIG. 4). Therefore, as shown in FIG. 4, the door body 2 is positioned directly above the stepped portion 8 in the closed position, and the surface 2c of the door body 2 and the front surface of the exposed surface portion 7b are positioned on substantially the same plane. Is done.

  Various operation buttons 9, 9,... Are arranged on the opening / closing surface portion 7 a of the door body 2. As the operation buttons 9, 9,..., For example, a power button for turning on / off the power, a tray operation button for moving a disk tray on which a disk-shaped recording medium is placed, disk-shaped recording Recording button and playback button for recording and playback of information signals on the medium, pause button for pausing playback state, stop button for stopping playback operation, volume button for changing volume, etc. Is provided.

  A horizontally long insertion / removal opening 10 is formed at a substantially central portion of the opening / closing surface portion 7b (see FIG. 2). The insertion / removal opening 10 is an opening for pulling out a disk tray (not shown) from the inside of the housing 6 and storing the disk tray in the housing 6. When the tray operation button is operated to pull out the disk tray from the inside of the housing 6 to place the disk-shaped recording medium, and when the tray button is operated again to store the disk tray in the housing 6, the disk The disk-shaped recording medium is relatively lifted from the disk tray and mounted on the disk table, and information signals are recorded or reproduced on the disk-shaped recording medium by rotating the disk table and driving the optical pickup.

  Vertically long arm projecting holes 11 and 11 are formed at both left and right ends of the open / close surface portion 7b, respectively.

  On the exposed surface portion 7b of the door body 2, a horizontally long display panel 12 is disposed at the center in the left-right direction (see FIGS. 1 and 2). The display panel 12 is a liquid crystal display, for example, and displays various types of information such as the operating state of the electronic device 1. A remote control light receiving unit 13 is provided at one end in the longitudinal direction of the display panel 12.

  The electronic device 1 includes door body opening / closing mechanisms 14 and 15 for moving the door body 2 relative to the main body 3 (see FIG. 2). The door body opening / closing mechanism 14 is disposed, for example, at the left end portion of the housing 6, and the door body opening / closing mechanism 15 is disposed, for example, at the right end portion of the housing 6. The door body opening / closing mechanism 14 and the door body opening / closing mechanism 15 are different from each other only in that the door body opening / closing mechanism 15 is partially omitted from the door body opening / closing mechanism 14. The opening / closing mechanism 14 will be described in detail, and only the difference from the door body opening / closing mechanism 14 will be briefly described for the door body opening / closing mechanism 15.

  The door body opening / closing mechanism 14 includes a bracket 16, and necessary parts are attached to or supported by the bracket 16 (see FIGS. 5 and 6).

  The bracket 16 has a horizontally long mounted portion 17 and an arm support portion 18 provided continuously at the left end of the mounted portion 17.

  The attached portion 17 is attached to the back surface of the front panel 7 of the housing 6 by, for example, screwing.

  The arm support portion 18 includes a front surface portion 19, a connecting portion 20 that protrudes rearward from the lower half of the right edge of the front surface portion 19, and a support protrusion 21 that protrudes rearward from the left edge of the front surface portion 19. And a shaft support portion 22 protruding rearward from the upper end portion of the right edge of the front surface portion 19. In the arm support portion 18, the rear edge of the continuous portion 20 is continued to the left edge of the attached portion 17. Shaft support holes 21a and 21b are formed at the upper end of the support protrusion 21 so as to be separated from each other in the front-rear direction. In the shaft support portion 22, shaft support holes 22a and 22b are formed at positions corresponding to the shaft support holes 21a and 21b of the support protrusion 21, respectively, separated from each other in the front-rear direction.

  A support shaft 23 is inserted into and supported by the shaft support holes 21 a and 22 a of the arm support portion 18.

  A D-cut support shaft 24 having a D-shaped cross section is inserted into and supported by the shaft support holes 21 b and 22 b of the arm support portion 18. In a state where the D-cut support shaft 24 is supported by the arm support portion 18, a part of the D-cut support shaft 24 protrudes greatly from the arm support portion 18 to the right.

  An arm body 25 is rotatably supported by the arm support portion 18, and the arm body 25 includes a first support arm 26, a second support arm 27, a third support arm 28, and a fourth support arm 29. (See FIGS. 5 to 7).

  As shown in FIG. 7, the first support arm 26 includes a base portion 26a and side portions 26b and 26b formed by being bent by 90 ° with respect to the base portion 26a, and the longitudinal direction of the side portions 26b and 26b. Is supported by the support shaft member 4 positioned on the upper side supported by the door body 2 in a freely rotatable manner.

  The second support arm 27 includes a base portion 27a and side portions 27b and 27b formed by being bent by 90 ° with respect to the base portion 27a, and one end portion in the longitudinal direction of the side portions 27b and 27b is the first portion. The first support arm 26 and the second support arm 27 are rotatable with respect to each other at the other end in the longitudinal direction of the side portions 26b and 26b of the support arm 26 via a rotation fulcrum shaft 30. It is said that. In the second support arm 27, the other ends in the longitudinal direction of the side portions 27 b and 27 b are rotatably supported by the arm support portion 18 of the bracket 16 via the support shaft 23.

  The third support arm 28 includes a base portion 28a and side portions 28b and 28b formed by bending 90 ° with respect to the base portion 28a, and one end portion in the longitudinal direction of the side portions 28b and 28b is the door body 2. Is supported by the support shaft member 4 positioned on the lower side so as to be rotatable. An insertion hole 28c is formed in the base portion 28a of the third support arm 28, and the second support arm 27 is inserted into the insertion hole 28c. In a state where the second support arm 27 is inserted into the insertion hole 28c of the third support arm 28, the side portions 28b and 28b of the third support arm 28 and the side portions 27b and 27b of the second support arm 27 Are supported so as to be rotatable with respect to each other via a rotation fulcrum shaft 31.

  The fourth support arm 29 includes a base portion 29a and side portions 29b and 29b formed by bending 90 ° with respect to the base portion 29a, and one end portion in the longitudinal direction of the side portions 29b and 29b is a third portion. The other end in the longitudinal direction of the side portions 28b and 28b of the support arm 28 is rotatably supported via a rotation fulcrum shaft 32, and the fourth support arm 29 and the third support arm 28 can rotate with respect to each other. It is said that. The other end of the fourth support arm 29 in the longitudinal direction of the side portions 29 b and 29 b is rotatably supported by the arm support portion 18 of the bracket 16 via the D-cut support shaft 24. On the other hand, it is impossible to rotate. The base 29a of the fourth support arm 29 is formed with a clearance hole 29c for preventing interference with the second support arm 29 when the second support arm 27 is rotated.

  The fourth support arm 29 is provided with protrusions 33 and 33 that are continuous with the other ends of the side portions 29b and 29b, respectively (see FIGS. 7 and 8). The protrusions 33 and 33 are formed by being bent by 90 ° in a direction approaching each other with respect to the side portions 29b and 29b.

  The fourth support arm 29 is provided with cams 34, 34 continuously from the protrusions 33, 33, respectively. The cams 34, 34 are formed by being bent 90 ° with respect to the protrusions 33, 33 and are positioned facing each other. Each part of the periphery of the cams 34, 34 is formed as a closing action part 34a, 34a and an opening action part 34b, 34b, respectively. The blocking action parts 34a, 34a and the opening action parts 34b, 34b are continuous, and the blocking action parts 34a, 34a are formed shorter than the opening action parts 34b, 34b.

  An urging spring 35 is supported on the D-cut support shaft 24. The urging spring 35 is, for example, a torsion coil spring, and includes a coil portion 35a and arm portions 35b and 35c. As shown in FIG. 8, the urging spring 35 has a coil portion 35a that is externally fitted to the D-cut support shaft 24, one arm portion 35b elastically contacted with the support shaft 23, and the other arm portion 35c. It is elastically contacted with the protrusion 33 of the fourth support arm 29. Accordingly, a biasing force is applied to the arm body 25 by the biasing spring 35 in the direction F shown in FIG. 8, that is, the direction in which the door body 2 is moved from the open position to the closed position.

  A gear unit 36 is attached to the bracket 16 (see FIGS. 5 and 6). The gear unit 36 is formed by supporting each required gear on a gear case 37 (see FIG. 9).

  The gear case 37 is formed by connecting a first member 38 and a second member 39 on the left and right sides, and a spring support protruding leftward is provided at a position near the front end of the first member 38 located on the left side. A protrusion 40 is provided, and a screw hole 40 a is formed in the spring support protrusion 40. The first member 38 is provided with a support shaft 41 protruding leftward at a position near the rear end.

  A damper 42 is attached to the inner surface of the second member 39. The damper 42 is, for example, an oil damper. The damper 42 includes a tank portion 42a in which oil is enclosed and a gear portion 42b that is rotatably supported by the tank portion 42a. When the gear portion 42b is rotated, the damper 42 is rotated by the oil enclosed in the tank portion 42a. Braking force is applied.

  A one-way clutch 43 is engaged with the gear portion 42 b of the damper 42, and the one-way clutch 43 is formed by connecting a first gear 44 and a second gear 45, and the first member 38 and the second member 39 are connected to each other. Supported between. In the one-way clutch 43, the second gear 45 is engaged with the gear portion 42 b of the damper 42.

  A shaft insertion hole 44a formed in a substantially oval shape is formed at the center of the first gear 44 (see FIG. 10).

  A shaft insertion hole 46 is formed at the center of the second gear 45 (see FIGS. 10 and 12). The shaft insertion hole 46 includes a central portion 46a formed in a circular shape and pin arrangement portions 46b, 46b, 46b formed around the central portion 46a at equal intervals in the circumferential direction. The pin placement portions 46b, 46b, 46b are formed on the outer side of the central portion 46a, and are curved surface portions 46c, 46c, 46c that are displaced outward as they go in one direction in the circumferential direction (R1 direction shown in FIG. 11), and the curved surface portion 46c. , 46c, 46c, and are surrounded by flat portions 46d, 46d, 46d extending substantially in the radial direction.

  A connecting support shaft 47 is inserted into the center portion 46a of the shaft insertion hole 44a of the first gear 44 and the shaft insertion hole 46 of the second gear 45 (see FIG. 10). The connection support shaft 47 includes a cut surface portion 47 a having a substantially oval cross-sectional shape and a round shaft portion 47 b having a circular cross-sectional shape, and the cut surface portion 47 a is inserted into the shaft of the first gear 44. The round shaft portion 47 b is inserted into the center portion 46 a of the shaft insertion hole 46 of the second gear 45. Accordingly, the first gear 44 cannot rotate with respect to the connection support shaft 47, and the second gear 45 can rotate with respect to the connection support shaft 47.

  Round shaft-like action pins 48, 48, 48 are arranged in pin arrangement portions 46 b, 46 b, 46 b of the shaft insertion hole 46 of the second gear 45, respectively.

  When the first gear 44 is rotated in the R2 direction shown in FIG. 11 in the one-way clutch 43, the action pins 48, 48, 48 are moved in the R2 direction as the connection support shaft 47 rotates. The action pins 48, 48, 48 are in contact with the curved surface portions 46c, 46c, 46c, respectively, and are sandwiched between the round shaft portion 47b and the curved surface portions 46c, 46c, 46c of the connection support shaft 47 (see FIG. 11). Accordingly, the rotational force of the first gear 44 is transmitted from the connection support shaft 47 to the second gear 45 via the action pins 48, 48, 48, and the first gear 44 is integrated with the second gear 45. Is rotated.

  On the other hand, when the first gear 44 is rotated in the R1 direction shown in FIG. 12 in the one-way clutch 43, the action pins 48, 48, 48 are moved in the R1 direction as the connection support shaft 47 rotates. The action pins 48, 48, 48 are in contact with the flat portions 46 d, 46 d, 46 d, respectively, and move along the flat portions 46 d, 46 d, 46 d in the direction of escaping from the round shaft portion 47 b of the connection support shaft 47, that is, in the radial direction (See FIG. 11). Therefore, the rotational force of the first gear 44 is not transmitted from the connection support shaft 47 to the second gear 45, the first gear 44 is rotated alone, and the second gear 45 is not rotated.

  The one-way clutch 43 has a second gear 45 that is larger in diameter than the first gear 44, and also functions as a reduction gear when the door body 2 is moved from the closed position to the open position.

  An intermediate gear 49 is supported on the first member 38, and the intermediate gear 49 is engaged with the first gear 44 (see FIG. 9). The intermediate gear 49 is meshed with the large diameter portion 50 a of the reduction gear 50 supported by the first member 38, and the small diameter portion 50 b of the reduction gear 50 is meshed with the connecting gear 51.

  The connection gear 51 is supported between the first member 38 and the second member 39, and a shaft insertion hole 51a having a D-shaped cross section is formed at the center of the connection gear 51. . The D-cut support shaft 24 protruding rightward from the arm support portion 18 is inserted into the shaft insertion hole 51 a of the connection gear 51. Since the shaft insertion hole 51 a of the connection gear 51 has a D-shaped cross section, it cannot be rotated with respect to the D-cut support shaft 24 and is rotated with the rotation of the fourth support arm 29. It is rotated integrally with the D-cut support shaft 24.

  When the connection gear 51 is rotated, the reduction gear 50, the intermediate gear 49, and the first gear 44 of the one-way clutch 43 are rotated. At this time, when the door body 2 is moved from the closed position to the open position, the rotation direction of the first gear 44 is the R2 direction shown in FIG. 11 and FIG. The transmission path between the gear 44 and the second gear 45 is connected, and the second gear 45 and the gear portion 42b of the damper 42 are rotated. Therefore, when the door body 2 moves from the closed position to the open position, a braking force is applied to the movement of the door body 2 by the damper 42, and the door body 2 is moved at a slow speed.

  Conversely, when the door 2 is moved from the open position to the closed position when the first gear 44 is rotated along with the rotation of the connecting gear 51, the rotation direction of the first gear 44 is reversed. 11 and FIG. 12, the transmission path between the first gear 44 and the second gear 45 of the one-way clutch 43 is disconnected, and the second gear 45 is not rotated. Therefore, when the door body 2 moves from the closed position to the open position, no braking force is applied to the movement of the door body 2 by the damper 42.

  An action lever 52 is rotatably supported on the support shaft 41 of the gear case 37 (see FIGS. 5 and 6).

  As shown in FIG. 5, the action lever 52 is integrally formed with two side portions 53, 53 that face each other and two connection portions 54, 55 that connect the upper edges of the side portions 53, 53. Made up.

  Support holes 53a and 53a are formed at the rear end portions of the lower end portions of the side surface portions 53 and 53, respectively. The action lever 52 is rotatably supported by the gear case 37 with the support shaft 41 inserted into the support holes 53a and 53a. A shaft member 56 is rotatably supported between the front end portions of the side surface portions 53 and 53. The shaft member 56 serves as an engaging portion that is slidably engaged with the cam 34 provided on the fourth support arm 29.

  The side piece 53 located on the right side is provided with a protruding piece 57 protruding rightward, and the protruding piece 57 is formed with a long screw insertion hole 57a in the front and rear.

  A screw member 58 is inserted into the screw insertion hole 57a of the projecting piece 57 from below, and the screw member 58 is screwed into the screw hole 40a of the gear case 37 from below. A spring member 59 that is a compression coil spring is supported on the screw member 58, and the spring member 59 is contracted between the head portion 58 a of the screw member 58 and the lower surface of the protruding piece 57. Therefore, the action lever 52 is always urged by the spring member 59 in the direction in which the shaft member 56 moves substantially upward. The upward movement of the action lever 52 is restricted by the protrusion 57 coming into contact with the spring support protrusion 40 of the gear case 37 from below.

  The door body opening / closing mechanism 15 located on the right side is symmetrical with respect to the door body opening / closing mechanism 14 and includes a bracket 16 and an arm body 25, but includes a gear unit 36 and an action lever 52. Absent. Therefore, the door body opening / closing mechanism 15 includes only the minimum components necessary for opening / closing the door body 2, and the number of parts is reduced.

  Below, operation | movement of the door body opening / closing mechanism 14 is demonstrated (refer FIG. 13 thru | or FIG. 23). The operation of the door body opening / closing mechanism 15 is the same as the operation of the door body opening / closing mechanism 14 for the same components as those of the door body opening / closing mechanism 14, and thus the description thereof is omitted.

  First, the state of each part when the door body 2 is in the closed position will be described (see FIGS. 13 and 14).

  The arm body 25 is in a state in which the first support arm 26 and the second support arm 27 are folded, and the third support arm 28 and the fourth support arm 29 are folded. (Refer to FIG. 13). Since the arm body 25 is arranged in the folded state at the closed position as described above, the space for arranging the arm body 25 is small, and the electronic device 1 can be downsized accordingly.

  The shaft member 56 of the action lever 52 is engaged with the end of the closing action part 34a of the cam 34 provided on the fourth support arm 29 opposite to the opening action part 34b (see FIG. 14). As described above, the action lever 52 is always urged by the spring member 59 in the direction in which the shaft member 56 moves substantially upward, so that the door 2 is moved to the closed position by the fourth support arm 29. The turning force in the direction (S1 direction shown in FIG. 14) is applied. Accordingly, the door body 2 is pressed against the open / close surface portion 7a of the front panel 7 at the closed position (see FIG. 13).

  Since the door body 2 is pressed against the opening / closing surface portion 7a by the urging force of the spring member 59 at the closed position, a thin shock absorbing material is provided on the back surface 2a of the door body 2 so that the door body 2 contacts the opening / closing surface portion 7a. You may make it aim at absorption of the impact of time and sound insulation.

  When the door body 2 is moved from the closed position to the open position, the arm body 25 is rotated with the first support arm 26 about the rotation fulcrum shaft 30 and the second support arm 27 is supported. The third support arm 28 is rotated about the rotation fulcrum shaft 31 and the rotation fulcrum shaft 32 as a fulcrum, and the fourth support arm 29 is integrated with the D-cut support shaft 24. (See FIG. 15).

  In the initial state in which the door body 2 moves from the closed position to the open position, the door body 2 is opened to the spring force of the biasing spring 35 supported by the spring member 59 and the D-cut support shaft 24. Moved towards. At this time, since the arm body 25 is configured by four arms and seven rotation fulcrums, the door body 2 is moved substantially forward (see FIG. 15). Therefore, the lower end portion of the door body 2 does not contact the stepped portion 8 of the front panel 7 and the door body 2 is smoothly moved.

  Further, in order to avoid contact between the lower end portion of the door body 2 and the stepped portion 8, it is not necessary to increase the gap between the lower end portion of the door body 2 and the stepped portion 8. Probability can be reduced.

  Furthermore, since the gap between the lower end portion of the door body 2 and the stepped portion 8 can be reduced, the appearance is good and the design can be improved.

  When the fourth support arm 29 is rotated, the action lever 52 is slid with the closing action part 34a of the cam 34 and moved toward the opening action part 34b, with the support shaft 41 as a fulcrum. Then, it is rotated in the direction Q2 shown in FIG.

  When the door body 2 is moved from the closed position toward the open position, as described above, the transmission path between the first gear 44 and the second gear 45 of the one-way clutch 43 is connected, and the second gear 45 is connected. And the gear portion 42b of the damper 42 are rotated. Therefore, the braking force by the damper 42 is applied to the door body 2, and the door body 2 is moved at a slow speed.

  When the door body 2 is continuously moved toward the open position, the door body 2 is gradually rotated so as to incline toward the near side (see FIG. 16).

  In the action lever 52, the shaft member 56 reaches a continuous point between the closing action part 34a and the opening action part 34b of the cam 34 (see FIG. 17).

  When the door body 2 is further moved toward the opening position, the action lever 52 causes the shaft member 56 to slide with the opening action portion 34b of the cam 34 (see FIG. 18). Since the action lever 52 is always urged by the spring member 59 in the direction in which the shaft member 56 moves substantially upward, the door 2 is moved to the open position by the fourth support arm 29 via the action lever 52. The turning force in the direction (S2 direction shown in FIG. 18) is applied. The door body 2 is given a moving force from the closed position to the open position by its own weight, and is directed toward the open position while receiving the braking force of the damper 42 against the spring force of the biasing spring 35. It is moved (see FIG. 19).

  When the door body 2 is subsequently moved toward the open position, the shaft member 56 of the action lever 52 is separated from the closing action portion 34a of the cam 34 (see FIG. 20), and the action lever 52 of the spring member 59 is interposed. Thus, no spring force is applied to the fourth support arms 29. Accordingly, the door body 2 is moved toward the open position only by its own weight while receiving the braking force of the damper 42 against the spring force of the biasing spring 35. At this time, the action lever 52 is restricted from rotating by the spring member 59 so that the protrusion 57 contacts the spring support protrusion 40 of the gear case 37 from below (see FIG. 20).

  When the door body 2 is further moved toward the open position, the movement of the door body 2 is restricted by the cam 34 coming into contact with the stopper 54a of the action lever 52 and is held at the open position (see FIG. 21).

  In the state moved to the open position, the door body 2 is positioned in a substantially horizontal state below the display panel 12 provided on the front panel 7 (see FIG. 22). Accordingly, the entire surface of the display panel 12 can be viewed from the front side, and the remote control light receiving unit 13 is not blocked by the door body 2.

  On the other hand, when the door body 2 is moved from the open position toward the closed position, an operation opposite to the above-described operation when the door body 2 is moved from the closed position toward the open position is performed. That is, in the arm body 25, the first support arm 26 and the second support arm 27 are gradually folded, and the third support arm 28 and the fourth support arm 29 are gradually folded. In 52, the shaft member 56 is slid from the opening action portion 34b of the cam 34 to the closing action portion 34a, and reaches the closing position.

  When the door body 2 is moved from the open position to the closed position, the transmission path between the first gear 44 and the second gear 45 of the one-way clutch 43 is disconnected as described above, and the second gear 45 Is not rotated, and the braking force by the damper 42 is not applied to the door body 2. At this time, in a state where the shaft member 56 of the action lever 52 is in sliding contact with the opening action portion 34b of the cam 34, the biasing force in the direction in which the door member 2 is moved from the closed position to the open position by the spring member 59 is applied. Although applied, an urging force in the direction of moving from the open position to the closed position is applied by the urging spring 35 supported by the D-cut support shaft 24. Therefore, the urging force by the spring member 59 with respect to the door body 2 is relatively reduced, and the door body 2 can be moved toward the closed position with a small force.

  When the door body 2 is moved from the open position toward the closed position, the spring member 59 and the biasing force are applied when the shaft member 56 of the action lever 52 is in sliding contact with the closing action portion 34a of the cam 34. A biasing force in the direction of moving from the open position to the closed position is applied by the spring 35. Therefore, the door body 2 can be reliably moved to the closed position.

  As described above, the door body 2 is moved between the closed position and the open position, and this moving state is conceptually shown in FIG. As shown in FIG. 23, when the door body 2 is moved (M1 to M4) at a position close to the closed position, the door body 2 is moved substantially back and forth, and the lower end portion of the door body 2 is connected to the stepped portion 8 of the front panel 7. The door body 2 is smoothly moved without contact.

  FIG. 24 is a graph showing the relationship between the opening angle of the door body 2 and the load received from the door body 2 with and without the urging spring 35. The weight of the door body 2 is 500 g, and in the figure, the horizontal axis indicates the opening angle of the door body 2, which is 0 ° at the closed position and 90 ° at the open position. The vertical axis represents the load received from the door body 2, and is a value measured by applying a push-pull gauge perpendicular to the door body 2 at the center in the left-right direction at the upper end of the door body 2.

  Note that the data shown in FIG. 24 does not include the biasing force of the spring member 59.

  As shown in the figure, it is understood that when the urging spring 35 is provided, the load received from the door body 2 is greatly reduced as compared with the case where the urging spring 35 is not provided. Therefore, as described above, the door body 2 can be moved toward the closing position with a small force.

  Note that the load on the door body 2 is negative at the opening angle of 0 ° and in the vicinity thereof. This is because when the door body 2 starts to move from the closed position to the open position, that is, 0. This is because the door body 2 is moved so that the center of gravity is lifted at an opening angle of about 10 ° to 10 °, and at this opening angle, a load is applied from the open position to the urging position due to its own weight. In addition, the load on the door body 2 is reduced when the opening angle reaches from 80 ° to 90 °. This is because the door body 2 is in the vertical direction so that the center of gravity is in the vertical direction when the opening angle is between 70 ° and 80 °. This is because the door 2 is a trajectory that moves so as to approach the main body 3 in a state where the door 2 is moved and then moved toward the open position.

  In the above, as an example of the arm body 25, the first support arm 26 and the second support arm 27 are rotatably connected to each other, and the third support arm 28 and the fourth support arm 29 are rotated to each other. Although an example in which the intermediate part of the second support arm 27 and the intermediate part of the third support arm 28 are rotatably connected is shown, the arm body is limited to such an example. As long as the first support arm 26 and the second support arm 27 are rotatably connected to each other and the third support arm 28 and the fourth support arm 29 are rotatably connected to each other. The intermediate portion of the first support arm 26 and the intermediate portion of the fourth support arm 29 are rotatably connected, and the intermediate portion of the first support arm 26 and the intermediate portion of the third support arm 28 are rotated. An intermediate part of the second support arm 27 connected or movable 4 of the intermediate portion may be rotatably connected to the support arm 29.

  As described above, by using the arm body 25 that rotatably connects the intermediate portion of the second support arm 27 and the intermediate portion of the third support arm 28, the door body opening / closing mechanisms 14, 15 It is possible to facilitate the design and reduce the size.

  Moreover, although the example which used the torsion coil spring as the urging | biasing spring 35 was shown above, the urging | biasing spring 35 is not restricted to a torsion coil spring, The urging | biasing door body 2 toward an obstruction | occlusion position from an open position is shown. Other types of springs, for example, coil springs, may be used.

  Further, the urging spring 35 may be disposed at any position on the transmission path from the one-way clutch 43 to the door body 2.

  As described above, the electronic device 1 includes the urging spring 35 that urges the door body 2 from the open position to the closed position in addition to the one-way clutch 43, and thus, with a small force as described above. The door body 2 can be moved from the open position to the closed position.

  Further, when the door body 2 is moved from the open position toward the closed position, the biasing force toward the closed position by the biasing spring 35 in addition to the braking force by the one-way clutch 43 with respect to the movement of the door body 2. Therefore, the braking force by the one-way clutch 43 can be reduced by that amount, the reduction gear ratio supported by the gear case 37 can be reduced, the number of gears can be reduced, and the size of the gear can be reduced. Can be small.

  Therefore, the space of the gear can be reduced and the number of parts can be reduced, and the electronic device 1 can be reduced in size.

  Furthermore, by using a torsion coil spring as the urging spring 35 and supporting it on the D-cut support shaft 24, the arrangement space of the urging spring 35 can be effectively utilized, and the electronic device 1 can be downsized. it can.

  In the electronic device 1, the action lever 52 is urged in a predetermined direction by the spring member 59, and the closing action portion 34 a is formed on the cam 34 to urge the door body 2 in the direction from the open position to the closed position. Therefore, the door body 2 is held at the closed position without rattling.

  Therefore, it is not necessary to attach a magnet, a catcher, or the like for holding the door body 2 in the closed position to the front panel 7 or the door body 2, and design quality is not deteriorated when these are attached.

  In addition, there is no need to worry about the adverse effects of the magnetic force of the magnet on each part and recording medium arranged in the main body 3, and there is no problem of breakage of the catcher protruding from the door body 2 or the front panel 7.

  Furthermore, since the cam 34 is provided with an opening action portion 34b that applies a moving force in the direction from the closed position to the open position, the door body 2 can be reliably moved to the open position. it can.

  Further, since the closing action portion 34a and the opening action portion 34b are formed in the cam 34 which is the same part, each of the doors 2 is provided with a separate moving force in the two directions of the closing position and the opening position. No mechanism is required and the number of parts can be reduced.

  Furthermore, since the closing action part 34a and the opening action part 34b are continuously formed on the cam 34, the movement of the door body 2 is not stopped halfway, and the smooth movement state of the door body 2 can be achieved. Can be secured.

  Further, since the cam 34 is formed integrally with the fourth support arm 29, the number of parts can be reduced.

  Further, since the rotatable shaft member 56 is used as the engaging portion that is slidably engaged with the cam 34, a smooth sliding operation with the cam 34 is ensured, and the operation reliability is improved. Can be achieved.

  In addition, since the stopper 54a for holding the door 2 in the open position is provided on the action lever 52, it is not necessary to provide a dedicated stopper separately, and the number of parts can be reduced.

  In the above, the door body 2 that opens and closes the insertion / removal opening 10 is shown as an example of the door body, but the door body in the present invention is not limited to the door body that closes the opening, and the opening / closing operation is performed. For example, a cover that protects various objects and parts may be used.

  The specific shapes and structures of the respective parts shown in the above-described best mode are merely examples of the implementation of the present invention, and the technical scope of the present invention is limited by these. It should not be interpreted in a general way.

FIG. 2 to FIG. 24 show the best mode of the present invention, and this figure is a perspective view of an electronic device showing a state in which a door body is in a closed position. It is a perspective view of the electronic device which shows the state which has a door body in an open position. It is an enlarged rear view of a door body. It is sectional drawing which shows the state which has a door body in the obstruction | occlusion position. It is a disassembled perspective view of a door body opening / closing mechanism. It is a perspective view of a door body opening / closing mechanism. It is an expansion disassembled perspective view of an arm body. It is an expansion perspective view which shows the relationship between an arm body and a gear unit. It is an expansion disassembled perspective view of a gear unit. It is an expansion disassembled perspective view of a one-way clutch. It is an expanded sectional view showing the operation state of the one-way clutch when the door body is moved from the closed position to the open position. It is an expanded sectional view which shows the operation state of a one-way clutch when a door body is moved toward an obstruction | occlusion position from an open position. 14 to 23 show the operation of the door body opening / closing mechanism, and this figure is a side view showing the state when the door body is in the closed position together with the housing. It is a side view which shows a state when a door body exists in a blockade position. It is a side view which shows a state immediately after the door body is moved from the closed position to the open position, together with a housing, with a part in cross section. FIG. 16 is a side view showing the state in which the door body is moved from the closed position toward the open position, with a case, partially in section, following FIG. 15. It is a side view which shows the state in which the shaft member is engaged with the continuous point of the obstruction | occlusion action part of a cam, and an open action part. It is a side view which shows the state in which the shaft member is engaged with the release action part of the cam. FIG. 17 is a side view showing the state in which the door body is moved from the closed position to the open position, with a case, partially in section, following FIG. 16. It is a side view which shows the state in which the shaft member was separated from the cam. It is a side view which shows the state by which the door body was moved to the open position. It is a side view which shows the state by which the door body was moved to the open position with a housing | casing by making a part into a cross section. It is a conceptual diagram which shows the movement state between the obstruction | occlusion position of a door body, and an open position. It is the graph which showed the relationship between the opening angle of a door body, and the load received from a door body, when not providing an urging | biasing spring.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Electronic device, 2 ... Door body, 3 ... Main body, 14 ... Door body opening / closing mechanism, 15 ... Door body opening / closing mechanism, 25 ... Arm body, 34 ... Cam, 34a ... Blocking action part, 34b ... Opening action part, 52 ... Operating lever, 54a ... Stopper, 56 ... Shaft member (engaging part), 59 ... Spring member

Claims (12)

A door body opening / closing mechanism that opens and closes a door body that is moved between an open position and a closed position with respect to a main body,
An arm body having one end connected to the door body and the other end rotatably connected to the main body and rotated relative to the main body to move the door relative to the main body;
A cam that is moved in conjunction with the rotational movement of the arm body;
An action lever that has an engaging portion that is slidably engaged with the cam and is rotated according to an engaging position of the engaging portion with respect to the cam;
A spring member that biases the action lever in a direction in which the engaging portion is pressed against the cam;
The cam has a closing action portion that applies a moving force in the direction from the open position to the closing position by the biasing force of the spring member transmitted through the engaging portion of the action lever. The door body opening and closing mechanism. An opening action portion is formed on the cam to apply a moving force in the direction from the closed position to the open position on the door body by the biasing force of the spring member transmitted through the engaging portion of the action lever. The door body opening and closing mechanism according to claim 1. The door body opening / closing mechanism according to claim 2, wherein a closing action part and an opening action part of the cam are continuously formed. The door body opening / closing mechanism according to claim 1, wherein the cam is formed integrally with the arm body. The door body opening / closing mechanism according to claim 1, wherein a rotatable shaft member is used as the engaging portion of the action lever. The door opening / closing mechanism according to claim 1, wherein the action lever is provided with a stopper for holding the door moved from the closed position toward the open position in the open position. An electronic device including a door body opening / closing mechanism that opens and closes a door body that is moved between an open position and a closed position with respect to a main body,
An arm body having one end connected to the door body and the other end rotatably connected to the main body and rotated relative to the main body to move the door relative to the main body;
A cam that is moved in conjunction with the rotational movement of the arm body;
An action lever that has an engaging portion that is slidably engaged with the cam and is rotated according to an engaging position of the engaging portion with respect to the cam;
A spring member that biases the action lever in a direction in which the engaging portion is pressed against the cam;
The cam has a closing action portion that applies a moving force in the direction from the open position to the closing position by the biasing force of the spring member transmitted through the engaging portion of the action lever. Electronic equipment equipped with a door body opening and closing mechanism. An opening action portion is formed on the cam to apply a moving force in the direction from the closed position to the open position on the door body by the biasing force of the spring member transmitted through the engaging portion of the action lever. An electronic apparatus comprising the door opening / closing mechanism according to claim 7. The electronic device provided with the door body opening / closing mechanism according to claim 8, wherein the closing action part and the opening action part of the cam are formed continuously. The electronic device provided with the door body opening / closing mechanism according to claim 7, wherein the cam is formed integrally with the arm body. The electronic device provided with the door body opening / closing mechanism according to claim 7, wherein a rotatable shaft member is used as the engaging portion of the action lever. The electronic device provided with the door body opening / closing mechanism according to claim 7, wherein the action lever is provided with a stopper for holding the door body moved from the closed position toward the open position in the open position.

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