JP2007085469A - Hinges mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the hinge mechanism which reduces the number of component items and a space while the damper effect is obtained, in the hinge mechanism which pivots a rotary member rotatably to a fixed member. <P>SOLUTION: The hinge mechanism to pivot the rotary member which is rotatable to a fixed member is provided with: a fixing cam 8 fixed to the case which becomes the body of a fixed member; a rotary cam 7 provided in the rotary member and rotated along with the rotary member; and a biasing member 10 to bias either of the above cams at least to the pressure contacting direction. The rotating member has a rotary shaft 6 with a key part 30 on its one end part; and a shaft with a housing recess 14 to house the key part 30, engages the rotary shaft 6 and the shaft 5 so that the shaft 5 rotates along with the rotation of the rotary shaft 6, and makes a viscous fluid 11 lie between a shaft 5 to be housed rotatably to a case and the case. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention is applied to a display unit such as a notebook type or a desktop personal computer, an opening / closing lid of a mobile phone or various mechanical devices, and an opening / closing member that needs to adjust the rotation angle of a water heater, home appliance, printer, air conditioner, compact, etc. The present invention relates to a hinge mechanism.

  Conventionally, a rotating member is pivotally supported with respect to a main body portion (fixing member), and in order to be able to adjust the rotating angle of this rotating member, it is automatically operated only by operating the rotating member to a desired rotating angle. Various hinge mechanisms have been proposed in which the rotating member is held in its position.

  Among these, in the contact surface between the friction surface provided on the pivot of the rotating member and the friction surface of the fixed member, rubber or other elastic bodies constituting the friction surface may cause inconvenience of deterioration over time. For example, Japanese Patent Application Laid-Open No. 64-59999 discloses one that can be used without much inferior locking mechanism. This is provided with a cam having a travel part on both the fixed member and the rotating member as a position locking means, and a spring means for pressing the cam constituting the friction surface. It has two symmetrical protruding parts.

  The conventional hinge using the cam has a problem that when the panel is opened and closed, the panel collides with a mating part or makes a sound when the panel collides.

  Therefore, there is a product that takes measures by installing a damper, but it requires two parts: a hinge and a damper.

Japanese Unexamined Patent Publication No. 64-599992

  Therefore, there are many parts, and a large space for mounting two parts is required.

  An object of the present invention is to solve such problems of the prior art. In a hinge mechanism in which a rotating member is pivotally supported with respect to a fixed member, a damper effect can be obtained and a component can be obtained. An object of the present invention is to provide a hinge mechanism capable of reducing the number of points and saving space.

  The present invention employs the following configuration in order to achieve this object.

  That is, the hinge mechanism of the present invention is a hinge mechanism that pivotally supports the rotating member with respect to the fixing member, and is provided in the fixing cam fixed to the case serving as the main body of the fixing member, and the rotating member. A rotating cam that rotates, and an elastic member that urges at least one of the two cams in the press-contact direction, the rotating member having a rotating shaft having a key portion at one end and a shaft having a storage recess for storing the key portion; The rotating shaft and the shaft are connected so that the shaft rotates as the rotating shaft rotates, and a viscous fluid is interposed between the shaft and the case rotatably accommodated in the case. It is a feature.

  According to this configuration, the shaft is connected to the rotating shaft having the rotating cam so that the shaft rotates with the rotation of the rotating shaft, and the viscous fluid is interposed between the shaft and the case. A damper having a viscous member can be integrally formed.

  Moreover, it is desirable to provide play in the rotational direction at the connecting portion between the rotating shaft and the shaft.

  Since play is provided in the rotational direction at the connecting portion between the rotation shaft and the shaft, a hinge mechanism that can obtain a damper effect in a desired rotation angle range can be provided.

  The key portion can be shaped like a cone with a guide, and a key groove in which the guide is housed can be provided in the housing recess of the shaft.

  By making the key part into a conical shape with a guide, it is possible to connect the rotating shaft and the shaft while maintaining the strength in a space-saving manner.

  The cam part which has the said rotating shaft, a fixed cam, a rotating cam, and an elastic member can be set as the unit structure.

  Since the cam portion is unitized, assembly with the shaft and case can be easily performed.

  In a normal use state in which the rotation shaft is connected to the storage recess, the storage recess can be configured to have a predetermined space behind the cone.

  With this configuration, when the cam part is pushed toward the back of the case, the entire cam part that is unitized against the spring pressure can be pushed into the back, making it easier to attach to the mating part. it can.

  The torque can be changed by changing the clearance between the case and the shaft.

  The present invention is configured as described above, and in the hinge mechanism in which the rotating member is pivotally supported with respect to the fixed member with the hinge mechanism and the damper effect by the cam, the damper effect can be obtained and the number of parts can be reduced and saved. A hinge mechanism capable of realizing space can be provided.

  Next, embodiments of the present invention (hereinafter referred to as “examples”) will be described in detail with reference to the drawings.

  1 is an exploded perspective view of a hinge mechanism according to an embodiment of the present invention, FIG. 2 is a perspective view of the assembled state, FIG. 3 is a sectional view of FIG. 2, and FIG. It is a side view which shows an example of use. 5 is a front view showing the rotating shaft, FIG. 6 is a cross-sectional view taken along line AA in FIG. 5, FIG. 7 is a cross-sectional view taken along line BB in FIG. 5, and FIG. FIG. 9 is an exploded perspective view showing the cam portion, FIG. 10 is a perspective view showing the cam portion assembled (unitized), and FIG. 11 is an assembled view. FIG. 12 and FIG. 13 are cross-sectional views illustrating torque change, FIG. 14 is a side view illustrating the shape of the mounting portion, and FIG. It is sectional drawing which shows the attachment method.

  As shown in FIG. 4, in the hinge mechanism according to the embodiment of the present invention, the rotation member is pivotally supported with respect to the fixed member, and the rotation angle of the rotation member with respect to the fixed member is 0 degree, that is, the folding position. To about 180 degrees. The angle that can be rotated may be arbitrarily set according to the method of use.

  Next, details of the hinge mechanism 1 will be described with reference to FIGS. 1 and 2. The hinge mechanism 1 is rotatably accommodated in a cylindrical case 4 with a bottom having a columnar storage recess 13 (which is a main body of the fixing member 2) and the columnar storage recess 13, and is key-shaped. A bottomed cylindrical shaft 5 having a housing recess 14, a rotating shaft 6 that is partly housed in a key-shaped housing recess 14, a ring-shaped rotating cam 7 that rotates together with the rotating shaft 6, and a rotating cam 7 A ring-shaped immobilizing cam 8 disposed opposite to each other, a rotating cam 7 and a shaft 5, which are attached to the rotating shaft 6, and a fixed cam 6 and a washer 9 for preventing the rotating cam 7 from coming off. Grease, silicone, which is attached between the washer 9 and the rotary cam 7 and is filled in a cylindrical storage recess 13 and a biasing member (compression spring) 10 for biasing the rotary cam 7 toward the fixed cam 8. Viscous fluid 11 such as oil and this viscous flow 11 is made of O-ring 15 serving as a seal member for sealing between the shaft 5 so as not to leak from the case 4.

  An attachment hole 16 for attaching the fixed cam 8 is formed in the vicinity of the open end of the case 4, and when the case 4 is attached to the device around the attachment hole 16, the protrusion 17 is provided to prevent rotation. Is formed. The case 4 is provided with a slit 45 so that a locking projection 18 of the fixed cam 8 described later can be easily locked in the mounting hole 16 (so that the opening end of the case 4 is easily elastically deformed).

  The fixed cam 8 is provided with an engaging projection 18 that fits into the mounting hole 16 of the case 4, and a first cam 19 is formed on the surface facing the rotating cam 7 toward the rotating cam 7. An insertion hole 20 through which the rotary shaft 6 is inserted is formed inside the fixed cam 8. As will be described later, the outer peripheral portion of the rotating shaft 6 that is in contact with the inner peripheral portion of the insertion hole 20 is formed in a columnar shape so as to be rotatable with respect to the insertion hole 20.

  The rotating cam 7 has a second cam 22 protruding from the surface facing the fixed cam 8 toward the fixed cam 8, and a substantially square fitting hole that fits into a substantially rectangular column portion 28 of the rotating shaft 6 to be described later. 24 is formed.

  As shown in FIGS. 5, 6, and 7, the rotary shaft 6 includes a substantially square attachment portion 25 for attachment to a member that opens and closes such as a panel, and a shaft portion 26 that is formed integrally with the attachment portion. The shaft portion 26 is formed subsequent to the cylindrical portion 27 formed adjacent to the mounting portion 25 (the portion that rotatably contacts the inner peripheral portion of the insertion hole 20 of the fixed cam 8), and the cylindrical portion 27. A substantially prismatic part 28 whose surface is dropped from the substantially cylindrical part 27, a recess 29 provided in the substantially prismatic part 28, and a diameter that decreases toward the other end following the substantially prismatic part 28. It consists of a conical part 31 and a guide part 32 formed in the conical part 31 in the longitudinal direction. The conical part 31 and the guide part 32 form a key part 30, and the key part 30 is accommodated in the accommodating recess 14 of the shaft 5. As shown in FIG. 6 and FIG. 7 as a cross-sectional view of FIG. 5, the guide portion 32 is formed so that the cross-sectional area increases as the diameter of the conical portion 31 decreases. In this way, the rotary shaft 6 can be connected to the shaft 5 while saving the space by forming the key portion 30 in the shape of the conical portion 31 and the guide portion 32 formed therein.

  The washer 9 is formed with a square hole that fits into the recess 29 of the rotating shaft 6. The concave portion 29 is formed longer in the length direction than the width of the washer 9 in accordance with the urging state of the urging member 11.

  The key-shaped storage recess 14 formed in the shaft 5 is formed so that the key portion 30 of the rotating shaft 6 is fitted, but the key groove 33 of the storage recess 14 has an angle (width) in the rotation direction from the guide portion 32. Is made large and has a play in the direction of rotation.

  In the state where the shaft 5 is inserted into the case 4 and assembled, the viscous fluid 11 is interposed in the clearance 34 between the case 4 and the shaft 5. Can be changed. The torque can be reduced by increasing the clearance 34 as shown in FIG. 12, and conversely, the torque can be increased by reducing the clearance 34 as shown in FIG. Therefore, by changing the clearance, the torque can be changed even if the viscous fluid 11 is one kind of oil (grease).

  Next, an example of an assembly method of the hinge mechanism 1 will be described.

  As shown in FIG. 9, the cam portion 23 is inserted into the shaft portion 26 of the rotating shaft 6 in the order of the fixed cam 7, the rotating cam 8, and the biasing member 10, and then the washer 9 is fitted into the recess 29. 10 and FIG. 11 can be unitized. Further, an O-ring 15 is fitted in the outer peripheral portion near the open end of the shaft 5. Subsequently, the united cam portion 23 is inserted and connected to the housing recess 14 of the shaft 5 with the guide 32 of the key portion 30 and the key groove 33 of the housing recess 14 aligned. Then, when the shaft 5 connected to the cam portion 23 is pushed into the case 4 filled with the viscous fluid 11, the engagement protrusion 18 of the fixed cam 8 engages with the mounting hole 16 of the case 4, as shown in FIGS. 2 and 3. It will be in the assembled state as shown, and an assembly will be completed. Since the cam portion 23 is unitized, the hinge mechanism 1 can be easily assembled.

  The storage recess 14 is formed to be longer than the conical part 31, and is configured to provide a predetermined space part 35 behind the conical part 31 in a normal use state as shown in FIG. Therefore, as shown in FIG. 15, when the cam portion 23 is pushed toward the back of the case 4, the entire cam portion 23 unitized against the spring pressure can be pushed into the back. As shown in FIG. 14, various attachment portion shapes can be adopted, the attachment portion shape has a high degree of freedom, and has a structure that can be easily attached to a counterpart component (such as an instrument body or an opening / closing panel).

Next, the overall operation of the above embodiment will be described. FIG. 4 shows a use example in which the hinge mechanism of the present invention is incorporated in a device. The case 4 is attached to the device main body 41 and the attachment portion 25 of the rotating shaft 6 is attached to the panel. 42 is attached. A description will be given assuming that the panel is opened when it is opened and closed from 0 degrees to nearly 180 degrees. 4a to 4e show the position of the panel 42 when it is opened from 0 degree to nearly 180 degrees, and a to e in FIG. 8 are key grooves 33 corresponding to the positions of the panel 42 from a to e in FIG. And the guide 32 are shown. Further, f to j in FIG. 4 indicate the position of the panel 42 when stored from nearly 180 degrees to 0 degree, and f to j in FIG. 8 correspond to the positions of the panels 42 from f to j in FIG. The relationship between the keyway 33 and the guide 32 is shown. Since there is play in the rotational direction between the keyway 33 and the guide 32 during the initial operation both when opened and when stored, there is no damper effect. That is, ab and f-g have play between the rotating shaft 6 (guide 32) and the shaft 5 (key groove 33), so even if the rotating shaft 6 rotates (the guide 32 hits the key groove 33). The shaft 5 does not rotate and does not have a damper effect. As shown in FIG. 8, be-e and g-j have a damper effect as the shaft 5 rotates as the rotating shaft 6 rotates.

It is a disassembled perspective view of the hinge mechanism 1 which concerns on an Example of this invention. It is a perspective view of the assembled state of the hinge mechanism 1 which concerns on an Example of this invention. It is sectional drawing of the assembled state of the hinge mechanism 1 which concerns on an Example of this invention. It is a side view which shows the usage example of this invention Example. It is a front view which shows a rotating shaft. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is explanatory drawing which shows the positional relationship of the keyway and guide at the time of opening and closing. It is a disassembled perspective view which shows the cam part of this invention. It is a perspective view which shows the cam part of the assembled (unitized) state of this invention. It is sectional drawing which shows the cam part of the assembled (unitized) state of this invention. It is sectional drawing explaining the torque change of this invention. It is sectional drawing explaining the torque change of this invention. It is a figure explaining the shape of the attaching part of this invention. It is sectional drawing which shows the attachment method of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hinge mechanism 4 Case 5 Shaft 6 Rotating shaft 7 Rotating cam 8 Fixed cam 10 Energizing member 11 Viscous fluid 13 Storage recessed part 14 Storage recessed part 16 Mounting hole 18 Engagement protrusion 19 First cam 22 Second cam 30 Key part 31 Conical part 32 Guide 33 Keyway 34 Clearance 35 Space

Claims (6)

  In a hinge mechanism in which a rotating member is rotatably supported with respect to a fixing member, a fixing cam fixed to a case serving as a main body of the fixing member, a rotating cam provided on the rotating member and rotating together with the rotating member, at least both An elastic member that urges one of the cams in the press-contact direction, and the rotating member includes a rotating shaft having a key portion at one end and a shaft having a storage recess for storing the key portion, and the rotating shaft and the shaft. A hinge mechanism characterized in that a shaft is connected so as to rotate with the rotation of a rotating shaft, and a viscous fluid is interposed between the shaft rotatably accommodated in the case and the case.   The hinge mechanism according to claim 1, wherein play is provided in a rotational direction at a connecting portion between the rotation shaft and the shaft.   3. The hinge mechanism according to claim 1, wherein the key portion has a conical shape with a guide, and a key groove in which the guide is stored is provided in a storage recess of the shaft.   The hinge mechanism according to claim 1, wherein the rotating shaft, the fixed cam, the rotating cam, and a cam portion having an elastic member are unitized.   5. The hinge mechanism according to claim 1, wherein, in a normal use state in which the rotating shaft is connected to the storage recess, the storage recess is provided with a predetermined space portion behind the conical portion.   The hinge mechanism according to claim 1, wherein the torque is changed by changing a clearance between the case and the shaft.

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