JP2010027991A - Rotary door mechanism of case and video-audio apparatus using the mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary door mechanism having a simple structure and capable of delaying a speed near the opening end of a rotary door to stop the door quietly regarding the rotary door mechanism of a case to be used for a video-audio apparatus. <P>SOLUTION: The rotary door mechanism includes: a bearing and a rotating shaft for journaling a rotary door; a twist spring whose one end is engaged with the case and whose other end is engaged with the rotary door; and a spring support shaft for journaling the twist spring. The twist spring includes a twisting part for winding the spring support shaft, a bending part formed between the twisting part and the rotary door and an engagement straight part arranged on the other end side of the bending part and engaged with an engaging groove part of the rotary door. When the rotary door is closed, a straight line OP connecting a center point O of the rotating shaft to an engagement point P between the engagement straight part of the twist spring and the engaging groove part of the rotary door intersects with a straight line PQ connecting a bending point Q for regulating the bending part of the twist sprint to the engagement point P approximately at right angles. When the rotary door is opened, the straight line OP and the straight line PQ are arranged so as to be approximately parallel. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a rotating door device for a housing used for an operation portion of an audiovisual apparatus, and in particular, includes a housing and a rotating door, and a bearing and a rotating shaft that pivotally support the rotating door; A torsion spring having one end locked to the housing and the other end locked to the pivot door, and a spring support shaft that pivotally supports the torsion spring, and the pivot shaft and the spring support shaft are The present invention relates to a revolving door device for a case that is spaced apart.

  The open / close door provided on the operation panel on the front of the housing of the audiovisual equipment is used to store operation buttons that are not frequently used, and is composed of a metal panel with the same material and appearance as the operation panel. The These open / close doors include a slide door whose open / close mechanism is a slide mechanism, a rotary door which is a rotary mechanism (or a rotary door which is a rotary mechanism), and the like. In the revolving door device, regardless of whether the door is opened or closed, the grounded housing and the metal panel of the door are kept conductive, preventing problems such as electrostatic breakdown of the integrated circuit, and easy assembly. It is preferable not to disturb the smooth movement of the door. There are cases where a damper mechanism is used and a torsion spring is used so that the revolving door moves smoothly.

  Conventionally, for example, there is a grounding mechanism for an open / close door of an electronic device casing including a casing, a pivot door, and a pivot mechanism by the applicant of the present application. This rotating mechanism is a cylindrical convex shaft, a rotating shaft portion, a bearing portion that rotatably accommodates the rotating shaft portion, and a resin molded integrally with the rotating shaft portion and attached to the housing. A rotating shaft holding portion, a bearing holding portion that is molded integrally with the bearing portion and attached to the rotating door, and an elastic metal piece obtained by bending a metal plate, one end of the rotating door A first conducting member fixed to the bearing holding portion so as to be positioned at the axial end portion of the rotation shaft portion regardless of rotation, and a metal screw, screwed so as to penetrate the rotation shaft in the axial direction And a second conducting member fixed to the rotating shaft portion so that the tip of the rotating member protrudes, regardless of whether the turning door is opened or closed, and one end of the first conducting member and the tip of the second conducting member However, it is pressed by the elastic force of the first conducting member to maintain conduction by contact, thereby grounding the casing and the pivot door (special Document 1).

  Conventionally, there is one that uses a torsion spring to regulate the opening / closing speed of the rotating door. For example, a housing having a shaft portion and a shaft of this housing so as to obtain a door structure that can be easily assembled without being affected by the elastic force of a spring while reducing the number of parts required for door mounting and its operation. A door formed with a bearing groove that is rotatably fitted to the part, and a claw part that is attached to the door and forms a bearing paired with the bearing groove and applies a pressing force to the side wall of the housing is formed. There is a door device comprising a panel having an elastic portion, and a spring having one end disposed on the housing and the other end engaged with the door (Patent Document 2).

Japanese Patent No. 3952921 (FIGS. 1 to 5) JP-A-8-326400 (FIGS. 1 to 4)

  However, in the case of a revolving door device using a torsion spring, it may not be sufficient to restrict the opening / closing speed of the revolving door. Specifically, the restriction of the torsion spring becomes weak near the end of the opening of the revolving door, and torque proportional to the opening angle of the revolving door is not generated. As a result, as the revolving door opens. There is a problem that the speed becomes faster and the speed becomes maximum near the end of opening. In the case of the pivoting door device of the audiovisual equipment, the speed is slow near the end of the pivoting door and the last is slow and quiet so as to appeal the high accuracy of the pivoting door. It is preferable to stop.

  The present invention has been made to solve the above-described problems of the prior art, and an object thereof is related to a rotating door device for a housing used in audiovisual equipment, and has a simple structure, and An object of the present invention is to provide a revolving door device that can be quietly stopped at a low speed near the end of opening of the revolving door.

  A revolving door device for a housing of the present invention is a revolving door device for a housing comprising a housing and a revolving door, and includes a bearing and a revolving shaft that pivotally supports the revolving door, and one end. Includes a torsion spring that is locked to the casing and the other end is locked to the pivot door, and a spring support shaft that pivotally supports the torsion spring, and the torsion spring winds the spring support shaft A torsion part, a bent part formed between the torsion part and the rotating door, an engagement linear part provided on the other end side of the bent part and engaged with an engaging groove part of the rotating door, When the pivot door is closed, a straight line OP connecting the center point O of the pivot shaft and the engagement point P between the engagement linear portion of the torsion spring and the engagement groove portion of the pivot door is: Arranged so that the straight line OP and the straight line PQ are substantially parallel to each other when the pivot door is opened and is substantially orthogonal to the straight line PQ connecting the bending point Q that defines the bent part of the torsion spring and the engaging point P. Is done.

  Preferably, the revolving door device of the housing of the present invention has a torsion spring substantially proportional to the turning angle α when the turning door is turned and the turning angle α is larger than a predetermined value. When the rotating door is rotated so that the torque is increased and the rotation angle α is maximized, the straight line OP and the straight line PQ are almost orthogonal again.

  Preferably, the rotating door device of the housing of the present invention has an engagement point P1 when the rotating door is closed with respect to a straight line A defined as a straight line connecting the rotating shaft and the spring support shaft that are separated from each other. And the engagement point P2 when the revolving door is rotated to the maximum, are set so as to be located on both sides of the straight line A, and the bending point Q1 when the revolving door is closed, and the revolving door Is set so that the bending point Q <b> 2 when it rotates to the maximum is positioned on one side of the straight line A.

  Preferably, the revolving door device of the housing of the present invention further includes a damper mechanism connected to the revolving door.

  Moreover, the audiovisual apparatus of the present invention includes any one of the above-described rotating door devices.

  Hereinafter, the operation of the present invention will be described.

  The revolving door device of the housing of the present invention comprises a housing and a revolving door, a bearing and a revolving shaft that pivotally supports the revolving door, one end locked to the housing, and A torsion spring whose other end is locked to the rotary door and a spring support shaft that pivotally supports the torsion spring are included. The torsion spring is provided on the other end side of the bending portion formed by a twisting portion that winds the spring support shaft, a bent portion formed between the torsion portion and the rotating door, and is engaged with the rotating door. And an engaging straight line portion that engages with the groove portion. The torsion spring whose one end is locked to the casing rotates so that the engaging linear part engaged with the revolving door twists the torsional part as the revolving door is greatly opened. Therefore, the torque of the torsion spring can be increased almost in proportion to the twisting angle. Therefore, the torsion spring of the pivot door device controls the speed of the pivot door.

  Here, the torsion spring has a bent portion between the torsion portion and the engagement straight portion. The bent portion is an angle of about 60 ° to 120 ° (preferably about 70 ° to 110 °) sandwiching the bending point Q of the linear spring material between the twisted portion of the torsion spring and the rotary door. This is the part that is bent. The bending point Q indicates an arcuate locus having a center of the spring support shaft as a concentric circle as the rotating door rotates. In addition, the torsion spring has an engagement straight line portion that engages with the engagement groove portion of the rotating door that rotates. At these engagement points P, the engagement linear portion of the torsion spring engages with the rotation door. While engaging the mating groove portion, the structure is configured to transmit forces acting on each other while sliding with each other depending on the rotation angle α. The engagement point P indicates a substantially arc-shaped locus having a center of the rotation axis as a concentric circle as the rotation door rotates.

  In the case of the revolving door device of the housing of the present invention, when the revolving door is closed, the engagement point P between the center point O of the revolving shaft and the engaging linear portion of the torsion spring and the engaging groove portion of the revolving door. And the straight line OP connecting the bending point Q that defines the bent portion of the torsion spring and the engaging point P are substantially orthogonal to each other, and the straight line OP and the straight line PQ are , Arranged so as to be substantially parallel. Note that “substantially orthogonal” means a state where the engagement angle θ defined by the straight line OP and the straight line PQ is preferably about 90 °, and includes a case where the angle range is about 70 ° to 110 °. Also, “substantially parallel” means a state where the engagement angle θ defined by the straight line OP and the straight line PQ is preferably about 180 °, including a case where the angle range is about 160 ° to 200 °. A state in which the connecting line OPQ is close to a straight line.

  Therefore, in the case of the pivot door device of the present invention, when the pivot door is pivoted and the pivot angle α becomes larger than a predetermined value, the torque of the torsion spring is approximately proportional to the pivot angle α. And the straight line OP and the straight line PQ are almost orthogonal again when the pivot door is pivoted so that the pivot angle α is maximized. That is, when the engagement angle θ defined by the center point O of the rotation shaft, the engagement point P, and the bending point Q of the torsion spring is closed, the rotation angle α is small. In contrast, when the pivot door is opened and the pivot angle α is increased, the value is about 90 ° to about 180 °, and further changes to approach 270 °.

  The engagement angle θ defined by the center point O, the engagement point P, and the bending point Q of the rotation axis is closely related to the direction in which the force vector acting between the torsion spring and the rotation door acts. To do. That is, when the turning door is closed and the turning angle α is decreased, the straight line OP and the straight line PQ are substantially orthogonal to each other, and the engagement angle θ is arranged to be an angle close to about 90 °. On the other hand, when the rotation door is opened and the rotation angle α is increased, the straight line OP and the straight line PQ are substantially parallel, the engagement angle θ is close to about 180 °, and the center point of the rotation shaft O, the engagement point P, and the bending point Q of the torsion spring are arranged in a substantially straight line. When the pivot door is pivoted so that the pivot angle α is maximized, the straight line OP and the straight line PQ are again substantially orthogonal, and the engagement angle θ is an angle close to about 270 °. Is done.

  That is, in the case of the rotating door device of the housing of the present invention, by appropriately providing the bending point Q to the torsion spring, the engagement angle θ is approximately equal in the vicinity of the opening of the rotating door and the maximum rotation angle α. The direction of the torque vector of the torsion spring coincides with the rotation direction of the revolving door so that the torque of the torsion spring is efficiently controlled so as to regulate the rotation of the revolving door. Can do. As a result, a large value can be obtained without reducing the torque of the torsion spring, and the revolving door device of the housing that can be quietly stopped by reducing the speed near the opening end of the revolving door is realized. It is possible to appeal the high operational accuracy of the revolving door. In addition, the revolving door apparatus of the housing | casing of this invention may adjust the delicate rotation speed of a revolving door by further having a damper mechanism connected with a revolving door.

  More specifically, in the rotating door device of the housing of the present invention, the rotating shaft and the spring support shaft are separately provided and separated from each other, so that the straight line A defined as a straight line connecting them is The engagement point P1 when the pivot door is closed and the engagement point P2 when the pivot door is rotated to the maximum are set so as to be located on both sides of the straight line A, and the pivot door is closed. The bending point Q1 when the turning door is rotated and the bending point Q2 when the turning door is rotated to the maximum are set so as to be positioned on one side of the straight line A. That is, as a result of the rotation shaft and the spring support shaft being separated from each other, the rotation angle α of the rotation door and the torque of the torsion spring are less likely to be proportional. As described above, it is possible to improve so that the speed is reduced in the vicinity of the opening end of the rotating door.

  The revolving door device of the housing of the present invention and the audiovisual apparatus using the same are simple in structure, and the speed is reduced near the end of opening of the revolving door, so that the revolving door is quietly stopped. be able to.

  The revolving door device of the housing of the present invention and the audiovisual apparatus using the same are simple in structure, and the speed is reduced near the end of opening of the revolving door, so that the revolving door is quietly stopped. For the purpose of providing a rotating door device, a rotating shaft that pivotally supports the rotating door, a torsion spring whose one end is locked to the casing, and whose other end is locked to the rotating door, A spring support shaft that pivotally supports the torsion spring, the torsion spring winding the spring support shaft, a bent portion formed between the torsion portion and the rotary door, and a bent portion An engaging linear portion that is provided on the other end side of the rotating door and engages with an engaging groove portion of the rotating door. When the rotating door is closed, the center point O of the rotating shaft and the torsion spring A straight line OP connecting the engagement straight line portion and the engagement point P between the engagement groove portion of the revolving door is substantially orthogonal to a straight line PQ connecting the bending point Q and the engagement point P defining the bending portion of the torsion spring. , If the Dotobira opens, and the straight line OP, and the straight line PQ is, by to be arranged substantially in parallel, it is realized.

  Hereinafter, although the rotation door apparatus of the housing | casing by preferable embodiment of this invention and the audiovisual apparatus using the same are demonstrated, this invention is not limited to these embodiment.

  FIG. 1 is a diagram for explaining a revolving door device 1 of a housing according to a preferred embodiment of the present invention, and a part of an audiovisual apparatus (not shown in its entirety) provided with the revolving door device 1 as viewed from diagonally forward. It is an enlarged view. For example, the revolving door device 1 stores switches for selecting functions in the inside of the revolving door 3 in an audiovisual apparatus such as an AV receiver having a housing 2, in the direction of the arrow shown in the figure. Therefore, in the “Close” state in which the revolving door 3 is closed, the design is improved without exposing the switch to the front surface, while in the “Open” state in which the revolving door 3 is opened, the switch is in the front surface. It can be exposed to improve operability. The revolving door 3 is locked by a locking mechanism (not shown) in the “Close” state. When the locking mechanism is released, the revolving door 3 is in an “Open” state, and rotates so as to be largely opened by its own weight. .

  2-4 is sectional drawing explaining operation | movement of the rotation door apparatus 1 of a present Example. 2 shows a “Close” state in which the revolving door 3 is closed, FIG. 3 shows a state at an intermediate position where the revolving door 3 is revolving, and FIG. 4 shows that the revolving door 3 is opened. It is a figure which shows the state of "Open" which is each, Comprising: (a) is a sectional side view of the revolving door apparatus 1, respectively, About (b), operation | movement of the revolving door apparatus 1 is demonstrated typically. It is a figure to do. In addition, illustration and description are abbreviate | omitted about the detailed structure of the housing | casing 2 of the audiovisual apparatus and the rotation door 3 which are unnecessary for description of operation | movement.

  The revolving door device 1 includes a revolving door 3, a torsion spring 10 and a damper 5, which will be described later, and a heavy aluminum door panel 30. It is pivotally supported by a material 20 (shown only on the left pivotal support member when viewed from the front). The shaft support member 20 pivotally supports a bearing 21 that engages with the rotation shaft 31 of the rotation door 3, a locking portion 22 that locks one end of the torsion spring 10, and the twisting portion 11 of the torsion spring 10. The spring support shaft 23 is integrally formed with resin. That is, the torsion spring 10 that controls the speed at which the pivot door 3 pivots is different from the bearing 21 that is the center of the pivot axis of the pivot door 3 and is twisted to the spring support shaft 23 located on the upper side. The moving part 11 is fixed.

  Here, the center of rotation of the bearing 21 and the rotating shaft 31 is a point O, and the center point of the spring support shaft 23 and the torsion spring 10 generates a rotational torque is a point R. Assuming that a straight line connecting the points R is a straight line A, the points O, R, and the straight line A are straight lines that substantially coincide with a vertical line that indicates the vertical direction of the housing 2, and are moved in the rotating door device 1. Indicates no reference position. On the other hand, when the tip position where the pivot door 3 pivots is a point S, for example, the pivot angle α of the pivot door 3 can be an angle defined by a straight line connecting the points R-O-S. . As shown in FIGS. 2 to 4, in the “Close” state, the rotation angle α is small and close to about 0 ° (in the case of FIG. 2, α is about 5 °). As the door 3 opens (in the case of FIG. 3, α is about 50 °), and in the “Open” state, the rotation angle α is close to about 90 ° (in the case of FIG. 4). Is about 80 °.)

  Rotating shafts 31 made of resin are attached to the left and right ends of the door panel 30 of the rotating door 3. The rotation shaft 31 is supported by the bearing 21 of the shaft support member 20 and rotates with the rotation of the rotation door 3. Then, the fan-shaped gear 32 formed integrally with the rotating shaft 31 and the engaging groove portion 33 engaged with the torsion spring 10 also rotate together with the rotating door 3. The gear 32 meshes with the gear of the damper 5 attached to the shaft support member 20 and controls the speed at which the rotary door 3 rotates. Further, the engaging groove portion 33 has a concave groove into which one end side of the torsion spring 10 is fitted, and the torsion spring 10 is engaged with the engaging groove portion 33, but depending on the rotation angle α, it slides on each other. It is structured to transmit the forces that interact with each other. The point of engagement between the engagement straight line portion 13 of the torsion spring 10 and the engagement groove portion 33 of the rotating door 3 is defined as a point P. The engagement point P indicates a substantially arcuate locus having the center point O of the rotation shaft 31 as a concentric circle as the rotation door 3 rotates.

  The torsion spring 10 is obtained by processing a spring steel material having a wire diameter of about 0.9 mm, and a torsion part 11 for winding the spring support shaft 23 of the shaft support member 20 with a diameter of about 7.5 mm, and a shaft support member. One of the linear portions 12 that are locked to the locking portion 22 of 20, the other of the engaging linear portions 13 that are locked to the engaging groove portion 33 of the rotating door 3, the twisting portion 11, and the engaging linear portion 13 and a bent portion 14 formed between the two. The bent portion 14 is a portion where a linear spring material is bent at an angle of about 110 °, and the position thereof is defined as a bending point Q. The bending point Q is a point indicating an arcuate locus having a point R indicating the center of the spring support shaft 23 as a concentric circle as the rotating door 3 rotates.

  At the engagement point P of the torsion spring 10, the engagement linear portion 13 of the torsion spring 10 engages with the engagement groove portion 33 of the rotation door 3, but it interacts with each other while sliding with each other depending on the rotation angle α. Transmit power. As shown in the drawing, the engagement angle θ is defined by the center point O of the rotation shaft 31, the engagement point P of the engagement linear portion 13 and the engagement groove portion 33, and the bending point Q of the torsion spring 10. The angle is a parameter indicating the generation of force acting between the torsion spring 10 and the revolving door 3 with the engagement point P interposed therebetween. In the case of this embodiment, when the pivot door 3 is in the “Close” state and the pivot angle α is small, the straight line OP is substantially perpendicular to the straight line PQ, and the engagement angle θ is about 90 °. When the rotation angle α of the rotary door 3 is increased, the straight line OP and the straight line PQ are substantially parallel, the engagement angle θ is about 180 °, and the line OPQ connecting the points is Close to a straight line. When the rotation door 3 is in the “Open” state and the rotation angle α is further increased, the straight line OP and the straight line OQ are almost orthogonal again, and the engagement angle θ further approaches 270 °. To change.

  As shown in FIG. 2, in the “Close” state in which the revolving door 3 is closed, the revolving door 3 is closed, so that the door panel 30 of the revolving door 3 is composed of the housing 2 and the pivot support member 20. Hiding in. The engagement point P1 between the engagement straight line portion 13 of the torsion spring 10 and the engagement groove portion 33 of the rotary door 3 is a position illustrated on the left side with respect to the straight line A connecting the point O and the point R. It is located on the back side of the moving door device 1. On the other hand, the bending point Q <b> 1 of the torsion spring 10 is a position illustrated on the right side with respect to the straight line A and is located on the front side of the rotary door device 1. Therefore, when the rotation angle α is small and the rotation door 3 is in the “Close” state, the straight line OP1 is substantially orthogonal to the straight line P1Q1, and the engagement angle θ is approximately 90 °, which is approximately 105 °. .

  Next, as shown in FIG. 3, until reaching the state of “Open” in which the pivot door 3 is opened, the pivot door 3 is pivoted and opened so that the pivot angle α is about 50 °. The engagement point P between the engagement linear part 13 of the torsion spring 10 and the engagement groove part 33 of the rotary door 3 draws a locus as it rotates, and is shown on the left side with respect to the straight line A connecting the points O and R. It moves to the right side from the position where it moves, and moves from the back side to the front side of the revolving door device 1. On the other hand, the bending point Q of the torsion spring 10 draws a locus at a position illustrated on the right side with respect to the straight line A and is located on the front side of the rotating door device 1. When the revolving door 3 is opened, the straight line OP and the straight line PQ become substantially parallel, and the engagement angle θ is close to about 180 ° and becomes about 190 °. As will be described later, when the rotation angle α is increased to about 30 ° or more, the torque of the torsion spring 10 increases substantially in proportion to the rotation angle α.

  Finally, as shown in FIG. 4, in the “Open” state in which the revolving door 3 is opened to the maximum, the revolving door 3 is revolved to the maximum, and the revolving angle α is about 80 °. The engagement point P2 between the engagement straight line portion 13 of the torsion spring 10 and the engagement groove portion 33 of the rotary door 3 is a position illustrated on the right side with respect to the straight line A connecting the point O and the point R. It is located on the front side of the moving door device 1. On the other hand, the bending point Q <b> 2 of the torsion spring 10 is a position illustrated on the right side with respect to the straight line A and is located on the front side of the rotary door device 1. Therefore, when the rotation angle α is maximized and the rotation door 3 is in the “Open” state, the engagement angle θ is about 230 °, and the straight line OP2 is substantially perpendicular to the straight line P2Q2 again. It becomes a state. As can be seen by comparing FIG. 3 and FIG. 4, when the turning door 3 of the present embodiment is turned to the maximum and the turning angle α is changed from about 50 ° to about 80 °, the torsion spring 10. In this range, the torque vector of the torsion spring 10 and the rotation direction of the revolving door 3 coincide with each other so that the torque of the torsion spring 10 can be efficiently applied to the revolving door. 3 can be operated so as to restrict the rotation.

  5 to 7 are cross-sectional views for explaining the operation of the rotating door device 4 of the comparative example in which the torsion spring 10 having the bending point Q in the present embodiment is changed to the torsion spring 40 having no bending point. That is, FIG. 5 shows a “Close” state in which the revolving door 3 is closed, FIG. 6 shows a state in an intermediate position where the revolving door 3 is revolving, and FIG. It is a figure which shows the state of "Open", Comprising: (a) is a sectional side view of the revolving door apparatus 1, respectively, (b) WHEREIN: The operation | movement of the revolving door apparatus 4 is demonstrated typically. It is a figure to do. In addition, the same code | symbol is attached | subjected about the part which is common in a present Example, and illustration and description are abbreviate | omitted.

  The torsion spring 40 of the comparative example is obtained by processing the same steel material as that of the torsion spring 10 of the present embodiment, and a torsion part 41 that winds the spring support shaft 23 of the shaft support member 20 with a diameter of about 7.5 mm; , One linear portion 42 that is locked to the locking portion 22 of the shaft support member 20, and the other engagement linear portion 43 that is locked to the engagement groove portion 33 of the rotary door 3, There is no bent portion between the twisting portion 41 and the engaging linear portion 43. In the following description, the engagement linear portion 43 of the torsion spring 40 is made to correspond to the engagement point P where the engagement linear portion 13 of the torsion spring 10 of the present embodiment engages with the engagement groove portion 33 of the rotating door 3. The engagement with the engagement groove 33 of the rotating door 3 is illustrated as an engagement point T. Further, the position indicating the direction in which the engagement straight line portion 43 extends is illustrated as a point U in contrast to the bending point Q that defines the position of the bending portion 14 of the torsion spring 10 of the present embodiment.

  As shown in FIG. 5, in the “Close” state in which the rotating door 3 is closed in the comparative example, the engagement point T <b> 1 between the engaging linear portion 43 of the torsion spring 40 and the engaging groove portion 33 of the rotating door 3 is , A position illustrated on the left side with respect to the straight line A connecting the points O and R, and located on the back side of the rotary door device 1. On the other hand, the point U <b> 1 indicating the direction of the engagement linear portion 43 of the torsion spring 40 is also a position illustrated on the left side with respect to the straight line A and is located on the back side of the rotary door device 1. Therefore, when the rotation angle α is small and the rotation door 3 is in the “Close” state, the engagement angle δ at which the straight line OT1 and the straight line T1U1 are engaged is about 145 °.

  Next, as shown in FIG. 6, when the pivot door 3 of the comparative example is pivoted and opened so that the pivot angle α is about 50 °, it rotates with the engagement linear portion 43 of the torsion spring 40. The engagement point T with the engagement groove 33 of the movable door 3 draws a locus as it rotates, and moves to the right from the position shown on the left side with respect to the straight line A connecting the points O and R. Move from the back side to the front side. On the other hand, the point U indicating the direction of the engagement linear portion 43 of the torsion spring 40 draws a locus that moves from the position illustrated on the left side to the right side with respect to the straight line A, and is positioned on the front side of the revolving door device 4. ing. When the revolving door 3 is opened, the straight line OT and the straight line TU are substantially perpendicular, and the engagement angle δ is close to about 250 °. As will be described later, when the rotation angle α becomes larger than about 50 °, the torque of the torsion spring 40 is not proportional to the rotation angle α.

  Then, as shown in FIG. 7, in the “Open” state in which the pivot door 3 of the comparative example is opened, the pivot door 3 pivots to the maximum and the pivot angle α is about 80 °. The engagement point T2 between the engagement linear part 43 of the torsion spring 40 and the engagement groove part 33 of the rotary door 3 is a position shown on the right side with respect to the straight line A connecting the points O and R, and It is located on the front side of the moving door device 4. On the other hand, a point U <b> 2 indicating the direction of the engagement linear portion 43 of the torsion spring 40 is a position illustrated on the right side with respect to the straight line A and is located on the front side of the rotary door device 1. Therefore, when the rotation angle α is maximized and the rotation door 3 is in the “Open” state, the engagement angle δ is about 270 °, and the straight line OT2 is substantially perpendicular to the straight line T2U2 again. It becomes a state. As can be seen by comparing FIGS. 6 and 7, when the rotation door 3 of the comparative example is rotated so as to be opened to the maximum and the rotation angle α is changed from about 50 ° to about 80 °, the torsion spring 40 is Since there is no bending point, in this range, the change in the engagement angle δ is small, and as a result, the torque of the torsion spring 40 is not transmitted so as to efficiently regulate the rotation of the revolving door 3.

  FIG. 8 shows that the torsion springs 10 to 40 with respect to the rotation angle α of the rotary door 3 are generated at the engagement points P to T in the rotary door device 1 of this embodiment and the rotary device 4 of the comparative example. It is a graph showing the torque to make. In the case of the present embodiment, when the rotation angle α becomes larger than about 30 °, the torque transmitted by the torsion spring 10 having the bending point Q in proportion to the rotation angle α is transmitted to the engagement point P. Becomes bigger. On the other hand, in the case of the comparative example, when the rotation angle α is increased to about 50 ° or more, in the torsion spring 40 having no bending point Q, the torque transmitted to the engagement point T is proportional to the rotation angle α. Disappear.

  That is, when the rotation angle α is in the range of about 50 ° to about 80 °, the rotary door 3 is about to rotate at an increased speed due to its own weight, but in the rotary door device 1 of the present embodiment, Since a large torque proportional to the rotation angle α of the torsion spring 10 having the bending point Q can be transmitted to the rotary door 3, the speed can be decreased in the vicinity of the opening end of the rotary door 3. In addition, the revolving door device 1 of the present embodiment has the damper 5 connected to the revolving door 3, and by adjusting this, the speed near the end of opening of the revolving door 3 is reduced. Adjustment is possible, and the rotating door 3 of the audiovisual apparatus can be stopped quietly, and the high operation accuracy can be appealed. On the other hand, in the rotating door device 4 of the comparative example, the torque is not proportional to the rotation angle α of the torsion spring 40 having no bending point Q in the range of the rotation angle α from about 50 ° to about 80 °. Since the rate of increase decreases, the speed cannot be sufficiently slowed even if the damper 5 is provided in the vicinity of the opening end of the revolving door 3.

  In the revolving door device of this embodiment and the comparative example, the bearing 21 or the revolving shaft 31 that is the center of revolving of the revolving door 3 and the spring support shaft 23 around which the torsion part that stores the torque of the torsion spring is wound. Are provided separately and separated from each other. Therefore, in the revolving door device 1 of the present embodiment, the torsion spring 10 is provided with the bent portion 14 defined by the bending point Q1, and the engagement straight line of the torsion spring 10 is further provided. By defining the position of the engagement point P between the portion 13 and the engagement groove portion 33 of the rotating door 3, the above effect is obtained. That is, as a result of the rotation shaft 31 and the spring support shaft 23 being separated from each other, the rotation angle α of the rotation door 3 and the torque of the torsion spring 4 are less likely to be proportional in the comparative example. In the rotating door device 1, the torsion spring 10 is provided with a bent portion 14, and a straight line A defined by the center point O of the bearing 21 or the rotating shaft 31 and the center point R of the spring support shaft 23 is The engagement point P1 when the revolving door 3 is closed and the engagement point P2 when the revolving door is rotated to the maximum are set so as to be located on both sides of the straight line A, and the revolving door 3 Is set so that the bending point Q1 when the door is closed and the bending point Q2 when the rotary door 3 rotates to the maximum are positioned on one side of the straight line A.

  As a result, in this embodiment, as described above, the speed of the revolving door 3 can be improved so as to decrease in the vicinity of the opening end where “Open” becomes “open”, and the revolving door device 1 that quietly stops is realized. To do. The audiovisual apparatus including the revolving door device 1 can appeal its high operation accuracy. In the present embodiment, the case where the damper 5 is used will be described. However, even when the damper 5 is not provided, the bending door 14 is silently examined by considering how the bending portion 14 of the torsion spring 10 is bent. Can be stopped.

  In addition, this invention is not limited to the said Example. The revolving door device 1 is not limited to the revolving door device of audiovisual equipment such as an AV receiver. In the revolving door device 1 described above, the torsion spring 10 is provided with the bent portion 14 of about 110 ° defined by the bending point Q. However, the angle of the bending point Q may be an angle near about 90 °. . That is, the angle of the bending point Q is the engagement point P1 when the rotating door 3 is closed with respect to the straight line A defined by the center point O and the center point R, and the case where the rotating door rotates to the maximum. The engagement point P2 is set to be located on both sides of the straight line A, and the bending point Q1 when the rotating door 3 is closed, and the bending point when the rotating door 3 rotates to the maximum It suffices if Q2 can be set to be positioned on one side of the straight line A.

  The revolving door device of the present invention can be applied not only to audiovisual equipment but also to electric and electronic devices that include an operation device that is pressed by a user.

It is a perspective view explaining the rotation door apparatus 1 by preferable embodiment of this invention. (Example 1) It is sectional drawing explaining operation | movement of the rotation door apparatus 1 by preferable embodiment of this invention. (Example 1) It is sectional drawing explaining operation | movement of the rotation door apparatus 1 by preferable embodiment of this invention. (Example 1) It is sectional drawing explaining operation | movement of the rotation door apparatus 1 by preferable embodiment of this invention. (Example 1) It is sectional drawing explaining operation | movement of the rotation door apparatus 4 of a comparative example. (Comparative Example 1) It is sectional drawing explaining operation | movement of the rotation door apparatus 4 of a comparative example. (Comparative Example 1) It is sectional drawing explaining operation | movement of the rotation door apparatus 4 of a comparative example. (Comparative Example 1) It is a graph showing the torque which the torsion spring with respect to rotation angle (alpha) of the rotation door 3 produces | generates at an engagement point. (Example 1, Comparative Example 1)

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 4 Rotating door apparatus 2 Housing | casing 3 Rotating door 5 Damper 10, 40 Torsion spring 11, 41 Torsion part 12, 42 Linear part 13, 43 Engagement linear part 14 Bending part 20 Supporting member 21 Bearing 22 Engagement Stop part 23 Spring support shaft 30 Door panel 30
31 Rotating shaft 32 Gear 33 Engaging groove

Claims (5)

A revolving door device of a housing comprising a housing and a revolving door,
A bearing and a pivot shaft for pivotally supporting the pivot door, a torsion spring having one end locked to the casing and the other end locked to the pivot door, and the torsion spring pivotally supported And a spring support shaft that
The torsion spring is provided on the other end side of the bent portion, a bent portion formed between the twisted portion and the rotating door, and a twisted portion that winds the spring support shaft. An engagement straight line portion that engages with the engagement groove portion of the pivot door,
A straight line OP connecting the center point O of the pivot shaft and the engagement point P between the engagement linear part of the torsion spring and the engagement groove part of the pivot door when the pivot door is closed. Is substantially orthogonal to a straight line PQ connecting the bending point Q that defines the bent portion of the torsion spring and the engagement point P,
When the pivot door is opened, the straight line OP and the straight line PQ are arranged so as to be substantially parallel.
A revolving door device for the housing. When the pivot door is pivoted and the pivot angle α becomes larger than a predetermined value, the torque of the torsion spring increases substantially in proportion to the pivot angle α, and the pivot angle is further increased. When the pivot door is pivoted so that α is maximized, the straight line OP and the straight line PQ are substantially orthogonal again.
A pivot door device for a housing according to claim 1. For a straight line A defined as a straight line connecting the rotating shaft and the spring support shaft that are separated from each other,
The engagement point P1 when the pivot door is closed and the engagement point P2 when the pivot door rotates to the maximum are set so as to be located on both sides of the straight line A, and
The bending point Q1 when the rotating door is closed and the bending point Q2 when the rotating door rotates to the maximum are set to be positioned on one side of the straight line A. ,
The revolving door apparatus of the housing | casing of Claim 1 or 2. A damper mechanism connected to the pivot door;
The revolving door apparatus of a housing | casing in any one of Claim 1 to 3. An audiovisual apparatus including the pivot door device of the housing according to claim 1.