JP2012237417A - Hinge device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hinge device, which includes a free-stop structure while facilitating the opening/closing of a rotary part side, and also has good incorporating property with a simplified structure.SOLUTION: The hinge device 1 includes: a columnar support shaft 50 holding a first member 10 and a second member 20 to be relatively rotatable; a fitting holding part 15 formed integrally on the first member 10 and including a fitting hole for inserting the columnar support shaft 50 with a predetermined gap; a curved piece 22 formed integrally on the second member 20 and screwed to a body 21 of the second member while being curved substantially at 180° to hold the columnar support shaft 50; a friction plate 40 fixed between the body 21 and the curved piece 22 by a screw 23 and positioned to surround the columnar support shaft 50, the friction plate causing a predetermined frictional force relative to the rotation of the second member 20; and one-way springs 61, 62 which idle the columnar support shaft 50 when the second member 20 is rotated in an opening direction and give a resisting force to the columnar support when it is rotated in a closing direction.

Description

  The present invention relates to a hinge device used in various electronic devices such as a personal computer, a mobile phone, and a game machine.

  In general, as an electronic device as described above, a structure in which a main body and an image display unit (rotating unit) such as a liquid crystal screen are folded and the image display unit is rotated from the main unit when used is known. . In such an electronic device, various hinge devices are disposed between the main body and the image display unit.

  Usually, the hinge device has a first member fixed to the main body portion side and a second member fixed to the image display portion side, and the first member and the second member are relative to each other by a common rotating shaft. It can be rotated automatically. In this case, the rotation shaft is press-fitted into one member (for example, the first member), generates a predetermined torque by the frictional engagement force, and the rotation shaft for the other member (for example, the second member). The structure is applied so that it will not come off. Specifically, for example, the central portion of the rotating shaft is formed into a cylindrical shape, this portion is press-fitted into one member, and both sides thereof are fitted into the other member as a polygonal cross section having a larger diameter than the central cylindrical shape. As a result, the rotation shaft is prevented from coming off, and a predetermined torque is generated in the cylindrical region in the center portion. According to such a structure, the image display unit can be rotated with respect to the main body unit, and can be stopped at an arbitrary rotation position by the torque generated by the frictional force as described above (so-called free stop structure). Become.

However, with such a structure, a large torque is applied when the image display unit is opened, and there is a problem that the usability is poor. That is, when the image display unit is opened, since the self-weight torque of the image display unit is added in addition to the free stop torque, the opening operation becomes heavy.
Therefore, for example, in Patent Document 1, two cylindrical springs are cam-coupled with a predetermined play angle along the axial direction between the rotating part side and the fixed part side, and the inner side of one cylindrical spring is Discloses a hinge device provided with a one-way clutch. This one-way clutch is arranged so as to be in a free state when the rotating part side is opened, and to be wedge-coupled when the rotating part is closed. In the direction in which the rotating part is closed, torque is generated by a cylindrical spring so as to be able to perform a free stop.

JP2003-194044

  According to the generally known hinge device described above, the rotating shaft has a cylindrical portion at the center, and both sides are formed in a polygonal shape. There is a problem that the nature is also bad. Also, in the hinge device disclosed in Patent Document 1 described above, two shaft members (cylindrical spring, fixed shaft) are arranged in the axial direction to cam them together, and accommodate a one-way clutch. The structure is complicated, and it is necessary to process and incorporate each shaft portion with high accuracy, which increases the cost.

  The present invention has been made paying attention to the above-mentioned problems, and provides a hinge device that is easy to open and close on the rotating portion side, has a free-stop structure, and has a simple structure and good integration. For the purpose.

  In order to achieve the above-described object, the present invention provides a first member and a first member that are disposed between a fixed portion and a rotating portion and hold the rotating portion so as to be rotatable relative to the fixed portion. A hinge device having two members, wherein the hinge device is formed integrally with the first member and a columnar support shaft that holds the first member and the second member so as to be relatively rotatable. A fitting holding part having a fitting hole through which a cylindrical support shaft is inserted at a predetermined interval, and the second member are integrally formed, and the cylindrical support shaft is held within the predetermined interval. A curved piece that is bent by approximately 180 ° and is screwed to the main body of the second member, and is fixed between the main body and the curved piece of the second member by the screw, and the cylindrical support shaft is wound. A friction plate that is arranged to generate a predetermined frictional force with respect to the rotation of the second member; A one-way resistance member that idles the columnar support shaft when rotated in the opening direction of the rotating portion and applies a resistance force to the columnar support shaft when rotated in the closing direction; It is characterized by that.

  The hinge device having the above-described configuration is disposed, for example, between a fixed portion of an electronic device and an image display portion (rotating portion) rotated with respect to the fixed portion, and the first member is disposed on the fixed portion side. The second member is fixed to the rotating portion side and used (they are relatively rotatable, so the first member is fixed to the rotating portion side and the second member is set to the rotating portion side. May be fixed). In this case, the friction plate disposed so as to wind the columnar support shaft generates a predetermined frictional force with respect to the rotation of the second member, and the one-way resistance member is When rotating in the opening direction of the rotating part, the cylindrical support shaft is idled, and when rotating in the closing direction, a resistance force is applied to the cylindrical support shaft. The frictional force by the plate can be set weak, and the one-way resistance member can be set to such an extent that the rotating portion does not naturally rotate due to the load due to its own weight. That is, by setting the frictional force by the friction plate to be weak, the rotating part can be opened with a weak force, and the resistance of the one-way resistance member against the rotational force to be closed by its own weight. It can be blocked by force, and a free stop structure can be obtained. In other words, since the one-way resistance member does not act on the torque when the pivoting portion is opened (the free stop torque does not act), the pivoting portion is opened with a force about the weight torque of the pivoting portion. It is possible to lighten the opening operation. In this case, since the resistance force in the closing direction can be adjusted by adjusting the resistance force of the one-way resistance member, for example, a display that performs a touch operation in the closing direction is arranged on the rotating unit. However, if the resistance is set to such a resistance that the rotating portion does not rotate carelessly by the touch operation, it is possible to prevent the rotation from moving during the touch operation.

  In the above-described configuration, basically, the first member and the second member are rotatably held by the columnar support shaft, and only incorporate the friction plate and the one-way resistance member. The structure is simplified and the cost can be reduced, and the assembling work can be easily performed.

  According to the present invention, it is possible to obtain a hinge device that is easy to open and close on the rotating portion side, has a free stop structure, has a simple structure, and is easy to incorporate.

It is a figure which shows one Embodiment of the hinge apparatus which concerns on this invention, (a) is a perspective view, (b) is the perspective view which looked at figure (a) from the arrow direction D1. It is a figure which shows the structure of a 1st member, (a) is the perspective view seen from the upper surface side, (b) is the perspective view seen from the back surface side. It is a figure which shows the structure of a 2nd member, (a) is the perspective view seen from the upper surface side, (b) is the perspective view seen from the back surface side, (c) is center sectional drawing. It is a figure which shows an example of the friction board integrated in a hinge apparatus, (a) is a perspective view, (b) is a side view which looked at figure (a) from the arrow direction D2, (c) is a figure (b). The top view seen from arrow direction D3. The perspective view which shows an example of the column-shaped support shaft integrated in a hinge apparatus. The figure which shows an example of the one way resistance member integrated in a hinge apparatus. The disassembled perspective view of each member which comprises a hinge apparatus.

  Hereinafter, an embodiment of a hinge device according to the present invention will be specifically described with reference to FIGS. 1 to 7.

  As shown in these drawings, the hinge device 1 according to the present embodiment is disposed between a fixed portion (device main body portion) and a rotating portion (image display portion) of an electronic device (not shown). As shown in the figure, the hinge device 1 is installed at a rotating portion between the fixed portion and the rotating portion. The hinge device 1 includes a first member 10 and a second member 20, a fixing portion (not shown) of the electronic device is fixed to the first member 10, and a rotating portion (not shown) The two members 20 are fixed. Since the first member 10 and the second member 20 are structured to be relatively rotatable, the rotation member may be fixed to the first member 10 and the fixing portion may be fixed to the second member 20 ( This embodiment will be described as the former).

  The first member 10 and the second member 20 can be integrally formed of synthetic resin or the like, and the two members are assembled with each other and held relatively rotatable by a columnar support shaft 50 described later. Has been. In this case, the first member 10 and the second member 20 may be made of metal, one of which may be a metal and the other may be a synthetic resin.

  The first member 10 includes a plate-shaped main body 11 and a fitting holding portion 15 having the same shape integrally formed so as to bulge on both sides of the main body 11. As shown in FIG. 2, they are integrally formed with a predetermined interval W. The main body 11 is formed with a screwing portion 11a into which a fixing member (such as a screw) for fixing a fixing portion of an electronic device is screwed, and each of the fitting holding portions 15 has a cylindrical shape. A circular fitting hole 15a for fitting the spindle 50 is formed on the same axis. As shown in FIG. 2, the fitting holding portion 15 is integrally formed with a cover portion 15b, and a one-way spring 60 to be described later is disposed in the cover portion 15b. Yes.

  The second member 20 is integrally formed with a plate-like main body 21 and a central portion of the main body 21, and is positioned within a predetermined interval W of the first member 10 so as to hold a columnar support shaft 50. And a bending piece 22 that bends approximately 180 °. As shown in FIG. 3, the curved piece 22 is configured such that a cylindrical support shaft 50 can be inserted through the curved region 22 a, and the curved piece 22 is bent and overlapped with the main body 21 with a predetermined gap. A screw hole 22b is formed to be screwed to 21 (screw 23 is inserted). The main body 21 is also formed with a screw hole 21a through which the screw 23 is inserted and a screw hole 21b in which a screw 25 for stopping the screw 23 inserted through the screw hole 21a is disposed. Further, the main body 21 is formed with a screwing portion 21c into which a fixing member (such as a screw) for fixing the rotating portion of the electronic device is screwed.

  Between the main body 21 of the second member 20 and the bending piece 22 formed to be bent with respect to the main body 21, the second support member 20 is fixed by the screw 23 and arranged so as to wind a columnar support shaft 50. A friction plate 40 is provided to generate a predetermined friction force with respect to the rotation of the second member 20 (see FIG. 4). The plate-like member 40 is formed of a material that is relatively easily elastically deformed (has a repulsive force) and is resistant to wear, and is an inner surface of the curved piece 22 that is integrally formed with the main body 21 of the second member 20. A curved piece side plate-like portion 41 that is in contact with the inner surface, a main body side plate-like portion 42 that is in contact with the inner surface of the main body 21, and the two plate-like portions are connected along the inner surface of the curved region 22 a of the curved piece 22. And a curved portion 43. Then, by assembling such a friction plate 40 to the second member, a predetermined frictional force is generated between the inner peripheral surface of the curved portion 43 and the outer peripheral surface of the columnar support shaft 50, and the second member 20. A predetermined frictional force is generated with respect to the rotation.

  Openings 41a and 42a through which the screws 23 are inserted are respectively formed in the curved piece side plate-like portion 41 and the main body side plate-like portion 42, and the friction plate 40 is formed in the second member 20 as shown in FIG. In the assembled state, the screw 23 is inserted into the screw hole 22b of the curved piece 22, the openings 41a and 42a, and the screw hole 21a of the main body 21, and the friction plate 40 is secured by the screw 25 in the screw hole 21b on the back side. Fixed.

  In addition, a protrusion 43a that protrudes inward from the inner surface of the main body side plate-like portion 42 is formed at the central portion in the axial direction of the curved portion 43 of the friction plate 40 of the present embodiment, and an end surface of the protrusion 43a. A protrusion 43b is formed at the center. Such a protrusion 43a can be formed by forming a processing opening 42b below the opening 42a of the main body side plate-like portion 42 and bending the lower end region of this portion inside. is there.

  The fitting hole 15a formed in the fitting holding portion 15 of the first member 10 and the curved region 22a of the second member 20 in which the friction plate 40 is disposed have a cylindrical shape as shown in FIG. The support shaft 50 is inserted. A circumferential groove 51 is formed at the center of the cylindrical support shaft 50, and a protrusion 43 b formed at the center of the friction plate 40 is engaged with the circumferential groove 51. Yes. For this reason, the columnar support shaft 50 is configured not to come off in the axial direction in the assembled state.

  Further, on the outer peripheral surface of the cylindrical support shaft 50, grease holding grooves 52 and 52 for holding grease are formed on both sides of the circumferential groove 51 and within a range where the friction plate 40 contacts. Is preferred. The grease retaining grooves 52 and 52 are filled with grease when the cylindrical support shaft 50 is assembled, so that when the rotating portion (not shown) is rotated with respect to the fixed portion, that is, When the friction plate 40 rotates together with the second member 20 around the outer peripheral surface of the columnar support shaft 50, the friction plate 40 can rotate smoothly and no squeak noise is generated. In addition, it is possible to prevent foreign matters, oil, and the like from entering from the outside, and to prevent torque fluctuations with respect to the second member 20 from occurring over a long period of time.

  Then, when the rotating portion (the second member 20 having the rotating portion fixed) is rotated in the opening direction of the rotating portion (the second member 20 to which the rotating portion is fixed), the cylindrical supporting shaft 50 is idled to A one-way resistance member 60 is provided for applying a resistance force to the columnar support shaft 50 when it is rotated in the closing direction.

  For example, as shown in FIG. 6, such a one-way resistance member 60 is configured by a one-way spring that is fixed to the first member 10 at one end side and wound around the columnar support shaft 50. Is possible. That is, according to such a one-way spring, the structure is simplified, the cost is reduced, and the hinge device is prevented from being enlarged. In the present embodiment, the one-way resistance member 60 by the one-way spring is installed on both sides of the curved piece 22 of the second member 20, and one end sides 61 a and 62 a of the one-way springs 61 and 62 are the first member 10. 1 and is covered with a fitting holding portion 15 (cover portion 15b) of the first member 10 as shown in FIG. For this reason, the one-way springs 61 and 62 installed on both sides stabilize the resistance, and the appearance can be improved without exposing the one-way spring.

  For each member as described above, as shown in FIG. 7, the cylindrical support shaft 50 is inserted while the second member 20 provided with the friction plate 40 is aligned with the first member 10. However, it can be easily assembled by attaching the one-way springs 61, 62, and finally the screw 23 is inserted and the nut 25 is screwed to the end portion thereof, so that the friction plate 40 and the columnar shape are formed. Are integrated in a state where a predetermined frictional force is generated between the shaft 50 and the support shaft 50. In this case, the columnar support shaft 50 is prevented from coming off by engaging a projection 43b formed at the center of the friction plate 40 with the circumferential groove 51, and the support shaft 50 has a polygonal cross section. Since it is neither a shape nor milling, the processing cost does not increase, and the assembling work and the disassembling work can be easily performed.

  For example, the hinge device 1 having the above-described configuration fixes the first member 10 with a screw or the like using a screwing portion 11a to a fixing portion of an electronic device, and screws the rotating image display portion. The second member 20 is fixed using the portion 21c. In this case, the friction plate 40 disposed so as to wind the columnar support shaft 50 generates a predetermined frictional force with respect to the rotation of the second member 20, and further, one end is the first member. The one-way springs 61 and 62 fixed to 10 cause the cylindrical support shaft 50 to idle when rotated in the opening direction of the rotating portion, and the cylindrical support shaft when rotated in the closing direction. 50 is provided with resistance. For this reason, it becomes possible to set the frictional force by the friction plate 40 to be weak, and it is possible to rotate (lift and rotate) the rotating part with a very weak force. The one-way springs 61 and 62 may be provided with a desired spring force according to the configuration of the rotating part and the usage mode. For example, if the one-way springs 61 and 62 are set so that they do not rotate naturally due to the load due to the weight of the rotating part, the rotating part can be opened with a weak force and be closed by its own weight. It is possible to prevent the turning force that is generated by the resistance force of the one-way springs 61 and 62, and a free stop structure can be obtained. That is, when the rotating part is opened, since the free stop torque does not act by the support shaft 50 and the one-way springs 61 and 62, the rotating part can be opened with a light force. In this case, in a structure in which a display that performs a touch operation in the closing direction is arranged on the rotating portion, the one-way springs 61 and 62 having a slightly large resistance force are provided in consideration of the load caused by the touch operation. It ’s fine. In this way, the rotating part can be lightly opened (as described above, the light opening operation in which the free stop torque does not act), and the rotating part can be inadvertently rotated even if a touch operation is performed. It is possible to obtain a free stop structure that prevents this.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to above-described embodiment, It can change variously. For example, the one-way resistance member described above may be configured by a one-way clutch, and such a one-way member may be configured to be provided only at one place on the support shaft. Further, the columnar support shaft can be appropriately deformed, for example, by forming a hollow portion therein, and the means attached to the fixed portion and the rotating portion can also be appropriately deformed.

  In addition, a plurality of hinge devices as described above can be installed according to the size of the electronic device, the usage mode of the rotating unit (image display device), and the like. Further, the friction plate 40 and the columnar support shaft 50 can be implemented by a combination of various materials so that a preferable frictional force is generated.

DESCRIPTION OF SYMBOLS 1 Hinge apparatus 10 1st member 15 Fitting holding | maintenance part 20 2nd member 40 Friction plate 50 Cylindrical support shaft 60 One-way resistance members 61 and 62 One-way spring

Claims (5)

A hinge device having a first member and a second member disposed between a fixed portion and a rotating portion and holding the rotating portion so as to be rotatable relative to the fixed portion,
A columnar support shaft that rotatably holds the first member and the second member;
A fitting holding portion that is integrally formed with the first member and has a fitting hole that allows the cylindrical support shaft to be inserted therethrough at a predetermined interval;
A curved piece that is integrally formed with the second member and is bent by approximately 180 ° and screwed to the body of the second member so as to hold the cylindrical support shaft within the predetermined interval;
The second member is fixed by the screw between the main body and the curved piece, and is disposed so as to wind the columnar support shaft. A friction plate for generating a frictional force;
A one-way resistance member that spins the cylindrical support shaft when rotating in the opening direction of the rotating portion, and applies a resistance force to the cylindrical support shaft when rotated in the closing direction;
A hinge device comprising:   A hinge device characterized in that a circumferential groove is formed on an outer peripheral surface of the cylindrical support shaft, and a protrusion engaging with the circumferential groove is formed at the center of the friction plate.   The grease retaining groove for retaining grease is formed on an outer peripheral surface of the cylindrical support shaft on both sides of the circumferential groove and within a range where the friction plate contacts. 2. The hinge device according to 2.   4. The one-way resistance member according to claim 1, wherein the one-way resistance member is a one-way spring fixed at one end to the first member and wound around the columnar support shaft. 5. Hinge device.   The hinge device according to claim 4, wherein the one-way spring is installed on both sides of the curved piece and is covered with the fitting holding portion.

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