JP2011214328A - Hinge device and electronic device using the hinge device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hinge device which exhibits a new function effect, and an electronic device using the hinge device.SOLUTION: The hinge device for rotatably connecting a first member 1 to a second member 2 includes: a cam portion 4 provided to a first rotator 3 rotating with the rotation of the first member 1, and a cam engagement portion 6 provided to a second rotator 5 rotating with rotation of the second member 2. The cam portion and the cam engagement portion are provided to be relatively rotatable, and biased by a biasing body 7 to be irregularity-engaged with each other. The biased engagement of the cam portion 4 and the cam engagement portion 6 is performed or half-performed, whereby the rotating positions of the first member 1 and the second member 2 are retained.

Description

  The present invention is used, for example, to pivotally mount a main body part provided with an operation part and a superposition part provided with a display part in a personal computer, a word processor, or a mobile phone, which is called a notebook type, so that it can be pivoted up and down. The present invention relates to a hinge device and an electronic device using the hinge device.

  For example, in an openable mobile phone or a notebook personal computer, a superposition unit having a display unit is provided to a main body unit having an operation unit so that it can be freely opened and closed via a hinge device. In some cases, the hinge device is provided with a superposition holding function for maintaining the closed state so that the overlapped portion does not rotate and open in an overlapped state where the portion is covered with the main body.

  That is, for example, a cam portion (for example, a convex portion) provided on the first rotating body that rotates together with the rotation of the main body portion that is provided to be rotatable relative to each other about the rotation shaft portion of the hinge device, and the rotation of the overlapping portion A cam engaging portion (for example, a concave portion) provided on the second rotating body that rotates with movement, and when the closed overlapping state is reached, the cam portion and the cam engaging portion are engaged by a biasing body (spring). By doing so, this superposition state is configured to be engaged and held, and is engaged again at the time of opening rotation, and a predetermined rotation position is configured to be engaged and held. For example, when the polymerization is closed, the polymerization is held in the closed state while being engaged or engaged, and when it is started and rotated nearly 180 degrees, the engaged state is again held during the engagement or engagement. It is comprised so that.

  By configuring the hinge device in this way, it is possible to automatically energize the urging body by providing a closed state holding device and releasing a complicated operation such as unlocking it without any troublesome operation. Thus, this superposition state is engaged and held, and can be released if it is rotated against this closing bias. In other words, it is always biased to stop opening in the superposed state, and when it is desired to turn and rotate, if it rotates against this biasing force, the cam engagement is released and it can be opened and rotated as it is.

  By the way, for example, when the overlapping portion is swung up and down by rotating the overlapping portion with respect to the main body portion from the closed overlapping state, the cam portion and the cam engaging portion are cam-engaged as described above. (Cam engagement in the middle of engagement) is released, and the convex portion of the cam portion moves outside the concave portion of the cam engaging portion, and is cam-engaged with the concave portion again.

  When the convex portion of the cam portion moves outside the concave portion of the cam engaging portion (between the concave portions), the cam portion and the cam engaging portion are biased in the direction of approaching (engaging) with each other by the biasing body. Therefore, the convex portion slides while being in pressure contact with the sliding surface between the concave portions.

  That is, the pressing force by the urging member becomes a rotation resistance (rotation torque), and during the rotation, if the rotation torque is large, the rotation torque stops at a position where the hand is released by the rotation torque. Can be realized. That is, it is possible to realize a free stop that can be smoothly rotated by hand without being rotated by its own weight, but can be automatically stopped and held at that position when the hand is released.

  The present applicant holds the hand of the overlapping portion opened with respect to the main body portion by the rotational resistance (rotational torque) between the convex portion (top portion) of the cam portion and the sliding surface between the concave portions of the cam engaging portion. A hinge device that achieves a good free stop state by stopping rotation at the released position and an electronic device using this hinge device have been completed and a patent application has been filed (Patent Document 1).

JP 2003-161311 A

  By the way, in order to realize a good free stop by generating sufficient rotation resistance to support the heavy body part while the performance and size of the hinge device are increasingly required, this free stop It is necessary to increase the pressure contact of the convex portion against the sliding surface to realize the above, but the durability of the sliding portion (sliding surface and convex portion) decreases as the pressure contact of the convex portion against the sliding surface increases. To do.

  Therefore, in the past, this sliding part has been applied with grease to obtain a good sliding with a stable rotation resistance and to improve the durability. In this case, since the grease is scraped off as it is used repeatedly, the grease is cut and the sliding is deteriorated. In addition, the durability may be significantly lowered after all.

  The present applicant pays attention to the above-mentioned problems, and as a result of repeating various experiments and researches, has developed an innovative hinge device and an electronic device using the hinge device with extremely high commercial value.

  The gist of the present invention will be described with reference to the accompanying drawings.

  A hinge device that rotatably connects the first member 1 and the second member 2, the cam portion 4 provided on the first rotating body 3 that rotates together with the rotation of the first member 1, and the second The cam engaging portion 6 provided on the second rotating body 5 that rotates with the rotation of the member 2 is provided so as to be relatively rotatable with respect to each other, and is configured to be urged by the urging body 7 to engage with each other. The cam portion 4 and the cam engagement portion 6 are biased or biased by the biasing body 7 so that the first member 1 and the second member 2 rotate. In the hinge device configured to hold the moving position, the cam portion 4 has a grease retaining recess 10 on the sliding surface 8 of the second rotating body 5 on which the cam portion 4 slides. An arcuate groove having a length in the sliding direction and having the center of rotation of the second rotating body 5 as the center of the arc is provided in the sliding surface 8. Those of the hinge apparatus characterized by being configured the grease reservoir recess 10.

  The hinge device according to claim 1, wherein a plurality of the grease storage recesses 10 are arranged in a radial direction from the rotation center of the second rotating body 5.

  In addition, a hinge device that rotatably connects the first member 1 and the second member 2, the cam portion 4 provided on the first rotating body 3 that rotates together with the rotation of the first member 1, The cam engaging portion 6 provided on the second rotating body 5 that rotates along with the rotation of the second member 2 is provided so as to be relatively rotatable with respect to each other, and is urged by the urging body 7 so as to engage with each other. The first member 1 and the second member 2 are configured such that the cam portion 4 and the cam engagement portion 6 are biased or biased by the biasing body 7. In the hinge device configured to hold the rotational position, the plurality of grease retaining recesses 10 are provided on the sliding surface 8 of the second rotating body 5 on which the cam portion 4 slides during rotation. The grease reservoir recesses 10 are arranged side by side on the sliding surface 8 in a row in the sliding direction of the cam portion 4, and the sliding A plurality of rows of grease storage recesses 10 arranged in parallel in the sliding direction of the cam portion 4 are provided on the moving surface 8 in a radial direction from the rotation center of the second rotating body 5. The present invention relates to a hinge device.

  Further, the grease retaining recess 10 is provided on the downward sliding surface 8a of the cam engaging portion 6 that slides when the cam portion 4 is engaged with the engaging cam portion 6. The hinge device according to any one of claims 1 to 3.

  The grease reservoir recess 10 has an arcuate groove having a length in the sliding direction of the cam portion 4 and having the center of rotation of the second rotating body 5 as the center of the arc. 5. The hinge device according to claim 4, wherein the hinge device is provided.

  6. The grease retaining concave portion 11 is provided at the bottom of the cam engaging portion 6 formed by a concave portion in which the cam portion 4 formed by a convex portion is engaged with the concave and convex portions. The hinge device according to any one of the above items.

  Further, in the rotation region where the cam portion 4 engages with the cam engaging portion 6, the cam portion 4 falls when the cam portion 4 slides with respect to the downward sliding surface 8 a provided on the cam engaging portion 6. The first member 1 and the second member 2 are provided with a rotation urging function that urges the rotation of the first member 1 and the second member 2 due to the depression. In the rotation region in which the cam portion 4 is engaged with and disengaged from the cam engagement portion 6 by the rotation, a rotation resistance is generated when the cam portion 4 slides with respect to the sliding surface 8. 7. A free stop function is provided which is in a free stop state in which the first member 1 and the second member 2 are rotated and stopped at a position where the hand which rotates the first member 1 and the second member 2 is released. It concerns on the hinge apparatus of any one of these.

  Moreover, the main body part provided with the operation part 12 or the display part 13 on the upper surface is referred to as the first member 1 or the second member 2, and the overlapping part provided with the display part 13 or the operation part 12 on the lower surface is referred to as the second member. 2 or the first member 1, and a hinge device characterized in that the end portions of the main body portion and the overlapping portion are pivotally connected by the hinge device according to claim 1. It relates to the electronic equipment used.

  Since the present invention is configured as described above, compared to the above-described conventional example, grease breakage does not occur even after repeated use, and good sliding of the sliding part can be maintained, and durability of the sliding part can be maintained. It can be dramatically improved, and these effects are achieved by a structure that can realize good sliding with always stable rotation resistance, and it has extremely high commercial value such as excellent practicality. An innovative hinge device and an electronic device using the hinge device are provided.

  Further, in the invention described in claim 2, it is an epoch-making hinge device such as a structure capable of realizing good sliding with more stable rotation resistance.

  Moreover, in invention of Claim 3, it becomes an epoch-making hinge apparatus which exhibits the effect similar to invention of Claim 1 mentioned above.

  Moreover, in invention of Claims 4-6, it becomes an epoch-making hinge apparatus, such as becoming the structure which can improve the durability of a sliding part further.

  Further, in the invention described in claim 7, it is possible to realize a good rotation biasing function and a free stop function while realizing the above-described good sliding with the stable rotation resistance. Hinge device.

  In the invention according to claim 8, it is possible to provide an electronic apparatus using an innovative hinge device that exhibits the above-described effects.

FIG. 3 is an explanatory diagram of a use state of the first embodiment. 1 is a perspective view showing Example 1. FIG. 1 is an exploded perspective view showing Example 1. FIG. FIG. 3 is an explanatory perspective view illustrating a main part according to the first embodiment. FIG. 3 is an explanatory perspective view illustrating a main part according to the first embodiment. FIG. 3 is a front view illustrating a main part according to the first embodiment. It is AA sectional drawing of FIG. FIG. 3 is a schematic operation explanatory diagram of the first embodiment. FIG. 6 is a perspective view illustrating a main part according to a second embodiment. FIG. 6 is a front view showing a main part according to a second embodiment. It is CC sectional drawing of FIG. FIG. 10 is a perspective view illustrating a main part according to a third embodiment. FIG. 10 is a front view of a main part according to a third embodiment. It is BB sectional drawing of FIG. FIG. 6 is an enlarged front view of a main part according to a third embodiment. It is DD sectional drawing of FIG. FIG. 10 is a perspective view of a main part according to a fourth embodiment. FIG. 10 is a front view of a main part according to a fourth embodiment.

  An embodiment of the present invention which is considered to be suitable will be briefly described with reference to the drawings showing the operation of the present invention.

  The rotating positions of the first member 1 and the second member 2 are maintained when the cam portion 4 and the cam engaging portion 6 are biased or biased by the biasing body 7.

  That is, for example, when the first member 1 and the second member 2 are placed in the overlapped closed state, the cam portion 4 and the cam engagement portion 6 are biased by the biasing body 7 or during the biasing engagement. By providing so, the superposition | polymerization obstruction | occlusion state of this 1st member 1 and the 2nd member 2 is hold | maintained.

  Further, for example, when the first member 1 and the second member 2 are opened and rotated from this overlapped state and the cam portion 4 is disengaged from the cam engaging portion 6, the cam portion 4 slides on the sliding surface 8. However, when the cam portion 4 slides, the cam portion 4 is urged by the urging body 7 and is in pressure contact with the sliding surface 8 to generate a rotation resistance (rotation torque). This rotation resistance is, for example, a so-called damper function that suppresses rapid rotation of the first member 1 and the second member 2, and further, for example, an arbitrary rotation depending on the magnitude of this rotation resistance. A so-called free stop function that can maintain this rotation stop state even if the hand is released at the position can be provided.

  Further, when the cam portion 4 slides with respect to the sliding surface 8 as the first member 1 and the second member 2 rotate, the grease in the grease retaining recess 10 provided on the sliding surface 8 is always smooth. Sliding is achieved.

  Specifically, the durability of the sliding portion formed by the sliding surface 8 and the cam portion 4 is improved due to the presence of grease, and the grease is held in the grease retaining recess 10, that is, Since the grease is held in a portion where the cam portion 4 that slides on the sliding surface 8 does not reach (a portion that is not scraped off), the sliding portion does not break off as in the conventional example described above.

  Accordingly, even if the use is repeated, the grease does not break, and the smooth sliding of the sliding part can be maintained, and the durability of the sliding part can be dramatically improved.

  By the way, in the present invention, when the grease reservoir recess 10 is provided on the sliding surface 8, the arc portion has a length in the sliding direction of the cam portion 4 and the rotation center of the second rotating body 5 is the arc center. A concave groove is provided on the sliding surface 8 to constitute the grease retaining recess 10, and this configuration not only maintains smooth sliding with the grease interposed but also a cam portion with respect to the sliding surface 8. The change of the contact area when the 4 slides can be prevented as much as possible, and good sliding with always stable rotation resistance (rotation torque) can be obtained.

  That is, for example, when the grease reservoir recess 10 is randomly provided on the sliding surface 8, the contact area of the cam portion 4 with respect to the sliding surface 8 varies depending on the rotational position, and the rotational resistance caused by the sliding of the cam portion 4. However, by providing the grease retaining recess 10 on the sliding surface 8, good sliding with stable rotational resistance cannot be obtained, and as a result, sliding from unstable sliding becomes impossible. The durability of the moving part may be reduced. If the contact area of the cam portion 4 with respect to the sliding surface 8 is set to be constant by randomly providing the grease retaining recesses 10 on the sliding surface 8, an infinite number of grease retaining recesses 10 having a small diameter will be provided. However, this is not practical in mass production because it is difficult to set the rotational torque and the mass productivity and cost are deteriorated.

  In this regard, according to the present invention, as described above, the grease retaining recess 10 has a length in the sliding direction, and the arcuate groove having the center of rotation of the second rotating body 5 as the center of the arc is formed on the sliding surface 8. In other words, from this configuration, for example, in what area the grease reservoir recess 10 is provided within a predetermined area of the sliding surface 8 that contacts when the cam portion 4 slides. Since the setting of how much rotation resistance is generated can be performed very easily, the contact area of the cam portion 4 with respect to the sliding surface 8 can be set constant, and the rotation caused by the sliding of the cam portion 4 The resistance can be made uniform at any rotational position. In this respect, the present invention is excellent in mass productivity and cost.

  Moreover, according to the present invention, when the cam portion 4 slides with respect to the sliding surface 8 due to the configuration described above, the grease becomes a streak in the sliding direction and is always supplied between the sliding surface 8 and the cam portion 4. Since the amount of grease is also uniform, good sliding with stable rotational resistance can be obtained. The present applicant has confirmed through repeated experiments that the good sliding with stable rotational resistance can be obtained by providing the grease reservoir recess 10 in the sliding direction.

  As described above, according to the present invention, it is possible to uniformly interpose grease while ensuring the contact area of the cam portion 4 with the sliding surface 8, and to improve the generation of durability and durability. Even if the grease reservoir recess 10 is provided, the original function of the sliding portion is not impaired.

  In the invention according to claim 4, the same effect as that of the present invention described above can be obtained.

  A specific embodiment 1 of the present invention will be described with reference to FIGS.

  As shown in FIG. 1, the present embodiment is applied to a laptop-type notebook personal computer. A main body having a key operation unit 12 is a first member 1, and a display unit 13 (LCD) is provided. In the pivot structure which can make the 2nd member 2 into a predetermined angle open state (use position) from the obstruction | occlusion state which this 1st member 1 and the 2nd member 2 superposed | polymerized as the superposition | polymerization part with which it was equipped. The hinge device H of the present invention is applied.

  In this embodiment, the first connecting body 14 (connecting bracket) connected to the first member 1 (main body part) is provided with the pivot shaft 15 in a non-rotating state and connected to the second member 2 (overlapping part). A bearing portion 16a (hole) into which the pivot shaft 15 is rotatably inserted is provided in the connecting body 16 (connecting metal fitting). In the drawing, the first member 1 and the pivot shaft 15 are formed as separate members, and the first member 1 and the pivot shaft 15 are connected in a non-rotating state. The one member 1 and the pivot shaft 15 may be configured integrally.

  Further, a ring-shaped second rotating body 5 is attached to the right side in the drawing of the bearing portion 16a in a non-rotating state, and the bearing portion 16a provided with the second rotating body 5 is connected to the pivot shaft via the friction plate 17. 15 is rotatably fitted.

  Specifically, the convex portion 5a protrudes from the peripheral portion of the second rotating body 5 toward the bearing portion 16a, while the concave portion 16b into which the convex portion 5a is fitted at one peripheral portion of the bearing portion 16a. The second rotating body 5 is attached to the bearing portion 16a in a non-rotating state by the fitting relationship between the convex portion 5a and the concave portion 16b. In the drawing, the bearing portion 16a and the second rotating body 5 are formed as separate members, and the bearing portion 16a and the second rotating body 5 are connected in a non-rotating state. The part 16a and the second rotating body 5 may be configured integrally.

  On the other hand, a ring-shaped first rotating body 3 is fitted in an opposing state from the outside (right side of the drawing) of the second rotating body 5 on the pivoting shaft 15 fitted with the bearing portion 16a. Reference numeral 3 denotes a rotation-preventing state with respect to the pivot shaft 15 and is slidable along the pivot shaft 15 in the length direction of the pivot shaft 15.

  Specifically, the cross-sectional shape of the predetermined range of the pivot shaft 15 is formed in an oval shape, while the shape of the central hole of the first rotating body 3 is also formed in an oval shape corresponding to the cross-sectional shape of the pivot shaft 15. Thus, when the first rotating body 3 is fitted on the pivot shaft 15, the first pivot body 3 is prevented from rotating with respect to the pivot shaft 15, and the length of the pivot shaft 15 is extended along the pivot shaft 15. It is configured to be slidable in the vertical direction.

  Further, on the side surface of the first rotating body 3 facing the second rotating body 5, convex portions 4 as cam portions 4 are provided to project at two opposing positions, while the first rotating body 3 of the second rotating body 5. On the opposite side surface, concave portions 6 as cam engaging portions 6 with which the cam portions 4 are engaged are formed in two opposite locations.

  Further, in this embodiment, the pair of cam portions 4 (convex portions) are provided as end faces of the first rotating body 3 at positions that are not on the same circumference on the side surface facing the second rotating body 5, and the pair of cam members The joint portion 6 (concave portion) is the end face of the second rotating body 5 and is provided at a position not on the same circumference on the side surface facing the first rotating body 3.

  Therefore, even if at least the first connecting body 3 is rotated 180 degrees relative to the second connecting body 5 from the rotation lock state (overlapping closed state) in which the cam portion 4 is engaged with the cam engaging portion 6, it is again engaged. It is the structure which does not become a rotation lock state collectively.

  The mounting structure of the bearing portion 16a to the pivot shaft 15 will be described. The plate 18 is fitted on the distal end of the pivot shaft 15, and the pivot shaft 15 is fixed by caulking. An elastic body 7a (ring-shaped disc spring 7a is adopted in the drawing) as a biasing body 7 (engagement biasing mechanism) is arranged in a fitted state on a pivot shaft 15 between the moving body 3 and the pivoting shaft 15. The disc spring 7a is urged in the engagement direction when the cam portion 4 is disengaged from or disengaged from the cam engaging portion 6 (the first rotating body 3 is separated from the second rotating body 5). It is configured as follows. The elastic body 7a may be a coil spring fitted on the pivot shaft 15.

  In the present embodiment, the biasing member 7 is configured so that the engagement between the cam portion 4 and the cam engagement portion 6 is not disengaged, and the rotation lock state is maintained. The cam engagement portion 6 is rotated by rotating the cam engagement portion 6 (second rotation body 5) together with the bearing portion 16a while sliding the first rotation body 3) against the biasing body 7 in the separation direction. On the other hand, the cam portion 4 is engaged and disengaged, and the second member 2 is rotated relative to the first member 1.

  In this embodiment, when both the first member 1 and the second member 2 are in a closed state where they are overlapped, the cam portion 4 and the cam engaging portion 6 are engaged with each other in a rotationally locked state. The state is configured to be held by the biasing body 7.

  In the region from the position immediately before the first member 1 and the second member 2 are completely closed to the closed state, that is, the rotation region where the cam portion 4 is engaged with the cam engaging portion 6, When the cam portion 4 slides with respect to the downward sliding surface 8a provided in the cam engaging portion 6 with the urging force of the urging body 7, a sagging action occurs. A rotation urging function for urging the rotation with the two members 2 is provided.

  In this embodiment, the pair of opposed top surfaces 8 other than the pair of cam engaging portions 6 provided on the second rotating body 5 are in pressure contact with the biasing body 7 when the pair of cam portions 4 are rotated. In the rotation region other than the rotation lock state in which the cam portion 4 engages with the cam engagement portion 6, the cam portion 4 is urged by the biasing body 7 to each of the sliding surfaces 8. It is comprised so that the rotation resistance by press-contacting may be provided.

  That is, the pair of cam portions 4 are in a state other than the rotation lock state (the overlapped state of the first member 1 and the second member 2) by the rotation resistance in which the urging body 7 presses against the pair of sliding surfaces 8. In the rotation region, the second member 2 is configured to be a free stop that can be stopped at any angle with respect to the first member 1. In this embodiment, the rotation is sufficient to realize this free stop. The urging force of the urging body 7 is set so as to generate dynamic resistance.

  Next, the operation will be described. In the overlapped state of the first member 1 and the second member 2, the cam portion 4 is engaged with the cam engaging portion 6 by the biasing body 7, so that the strong rotation Resistance is created and this occlusion is maintained. At this time, the cam portion 6 is positioned on the downward sliding surface 8a and is in a stopped state.

  On the other hand, when the second member 2 is raised with respect to the first member 1 from the closed holding state, the bearing portion 16a rotates with respect to the pivot shaft 15, but at this time, the cam engaging portion 6 (second rotating body). 5) With respect to 5), the cam portion 4 (first rotating body 3) rotates together with the bearing portion 16a, and the cam engaging portion 6 moves in the separating direction against the biasing body 7, and the engagement is disengaged. Will do.

  When the second member 2 is opened (started up), the cam 4 is pressed against the sliding surface 8 by the urging member 7, so that a rotational resistance is generated and a free stop occurs.

  Conversely, when the second member 2 is brought close to the first member 1 and brought close to the overlapped closed state to some extent, the cam engaging force between the cam portion 4 and the cam engaging portion 6 works to turn the biasing force in the closing direction. After that, it automatically bends and turns to a closed state.

  That is, the inside of the concave portion of the cam engaging portion 6 is an engaging portion with which the cam portion 4 is engaged, and the top surface 8 between the concave portions is in a state of being pressed by the biasing body 7 when the cam portion 4 rotates. Since the sliding surface 8 is slid, the cam member 4 is rotated from the sliding surface 8 into the recess by the urging member 7 so that the second member 2 rotates in the closing direction. A biasing force will be generated.

  Further, in this embodiment, as described above, the cam portions 4 are provided at two opposing positions of the first rotating body 3, and the cam engaging portions 6 are provided at two opposing positions of the second rotating body 5. The rotation lock in which the cam engaging portion 6 is engaged with the cam engaging portion 6 because the cam engaging portion 6 is not provided on the same circumferential surface of the first rotating body 3 and the second rotating body 5. Even if at least the first connecting body 3 is rotated 180 degrees relative to the second connecting body 5 from the state (polymerization closed state), the second member 2 is not engaged and locked. It is also possible to use the display unit 13 in a state opened 180 degrees from the closed state.

  For example, when there is no desk or table, such as in a car or train, you may sit on a seat and use a laptop computer on your knees (thighs). When the unit 13 is standing with respect to the operation unit 12, the display unit 13 is very difficult to see and use. In this respect, according to the present embodiment, as described above, the display unit 13 can be used 180 degrees opened from the closed state. It becomes the composition which demonstrates.

  In addition, in this embodiment, each of the opposed sliding surfaces 8 of the second rotating body 5 on which the pair of cam portions 4 slide is rotated, and grease retaining recesses 10 are provided, and the cam portions 4 are long in the sliding direction. The grease storage recess 10 is formed by providing the sliding surface 8 with an arc-shaped concave groove having a center and a center of rotation of the second rotating body 5.

  Specifically, as shown in FIGS. 4 and 5, a pair of grease reservoir recesses 10 having a length in the sliding direction of the cam portion 4 are formed on the sliding surface 8 from the rotation center of the second rotating body 5. They are arranged side by side so as to form two rows with a predetermined interval in the radial direction.

  The number of grease reservoir recesses 10 is not limited to two.

  Therefore, when the cam portion 4 slides with respect to the sliding surface 8 as the first member 1 and the second member 2 rotate, the grease in the grease retaining recess 10 provided on the sliding surface 8 is always smooth. Sliding is achieved.

  Specifically, the durability of the sliding portion formed by the sliding surface 8 and the cam portion 4 is improved due to the presence of grease, and the grease is held in the grease retaining recess 10, that is, Since the grease is held in a portion where the cam portion 4 that slides on the sliding surface 8 does not reach (a portion that is not scraped off), the sliding portion does not break off as in the conventional example described above.

  Accordingly, even if the use is repeated, the grease does not break, and the smooth sliding of the sliding part can be maintained, and the durability of the sliding part can be dramatically improved.

  In this embodiment, when the grease retaining recess 10 is provided on the sliding surface 8, the grease retaining recess 10 is provided on the sliding surface 8 with a length in the sliding direction of the cam portion 4. From the configuration, not only the smooth sliding with the grease interposed but also the change of the contact area when the cam portion 4 slides on the sliding surface 8 can be prevented as much as possible. Thus, it is possible to obtain good sliding with always stable rotation resistance (rotation torque).

  As described above, the present embodiment can apply grease uniformly while ensuring the contact area of the cam portion 4 with the sliding surface 8, and can improve the generation of durability and durability. Even if the grease reservoir recess 10 is provided, the original function of the sliding portion is not impaired.

  A specific embodiment 2 of the present invention will be described with reference to FIGS.

  In the present embodiment, a plurality of (three or more) grease reservoir recesses 10 are provided on the sliding surface 8 of the second rotating body 5 on which the pair of cam portions 4 slide when rotating, and the plurality of grease reservoir recesses 10 are provided. From the plurality of grease reservoir recesses 10 arranged in parallel in the sliding direction of the cam portion 4 and in parallel with the sliding surface 8 in the sliding direction of the cam portion 4. This is a case where a plurality of rows are provided in the radial direction from the rotation center of the second rotating body 5.

  Specifically, a plurality of circular grease reservoir recesses 10 are arranged on the sliding surface 8 at equal intervals in the sliding direction of the cam portion 4, and radial from the rotation center of the second rotating body 5. Are arranged in parallel in a state of a plurality of rows (three rows) at equal intervals. That is, the arcuate groove of Example 1 described above is intermittently provided and exhibits the same function.

  Accordingly, as in the first embodiment described above, the grease can be uniformly applied while ensuring the contact area of the cam portion 4 with respect to the sliding surface 8, and the generation of good rotation resistance and the durability can be improved. Even if the grease reservoir recess 10 is provided, the original function of the sliding portion is not impaired.

  The rest is the same as in Example 1.

  A specific third embodiment of the present invention will be described with reference to FIGS.

  In the present embodiment, as in the second embodiment, a plurality of grease reservoir recesses 10 are provided on the sliding surface 8 of the second rotating body 5 on which the pair of cam portions 4 slide during rotation, and the plurality of grease reservoirs are provided. A plurality of grease reservoirs in which the recesses 10 are arranged in parallel with the sliding surface 8 in a row in the sliding direction of the cam portion 4 and are arranged in parallel in the sliding direction of the cam portion 4 on the sliding surface 8. A plurality of rows of recesses 10 are provided in the radial direction from the rotation center of the second rotating body 5, and the cam engagement portion 6 slides when the cam portion 4 engages with the engagement cam portion 6. This is a case where the grease retaining recess 10 is provided on the downward sliding surface 8a.

  The grease reservoir recess 10 provided on the descending sliding surface 8a is provided with an arc-shaped concave groove having a length in the sliding direction of the cam portion 4 and having the center of rotation of the second rotating body 5 as the center of the arc. It is configured.

  Further, in this embodiment, the grease retaining concave portion 11 is provided at the bottom of the cam engaging portion 6 constituted by the concave portion with which the cam portion 4 constituted by the convex portion is engaged with the concave and convex portions.

  Accordingly, as in the first and second embodiments described above, the grease can be uniformly applied while ensuring the contact area of the cam portion 4 with respect to the sliding surface 8, and the generation of good rotation resistance and improved durability. Even if the grease reservoir recess 10 is provided, the original function of the sliding portion is not impaired.

  Further, in this embodiment, the grease retaining recess 10 is provided on the downward sliding surface 8a, which is a part to which a strong load is applied, so that the durability can be further improved, and the cam engagement composed of the recess is also provided. A large amount of grease can be held by providing the grease reservoir concave portion 11 at the bottom of the portion 6.

  The rest is the same as in Example 1.

  A specific fourth embodiment of the present invention will be described with reference to FIGS.

  In this embodiment, the grease retaining recess 10 is provided on the downward sliding surface 8a of the cam engaging portion 6 that slides when the cam portion 4 is engaged with the engaging cam portion 6.

  The grease reservoir recess 10 provided on the descending sliding surface 8a is provided with an arc-shaped concave groove having a length in the sliding direction of the cam portion 4 and having the center of rotation of the second rotating body 5 as the center of the arc. It is configured.

  Further, in this embodiment, the grease retaining concave portion 11 is provided at the bottom of the cam engaging portion 6 constituted by the concave portion with which the cam portion 4 constituted by the convex portion is engaged with the concave and convex portions.

  Therefore, by providing the grease reservoir recess 10 on the downward sliding surface 8a, which is a part to which a strong load is applied, the durability can be further improved, and at the bottom of the cam engaging portion 6 constituted by the recess. A large amount of grease can be held by providing the grease reservoir concave portion 11.

  The rest is the same as in Example 1.

  The present invention is not limited to the first, second, third, and fourth embodiments, and the specific configuration of each component can be designed as appropriate.

DESCRIPTION OF SYMBOLS 1 1st member 2 2nd member 3 1st rotation body 4 Cam part 5 2nd rotation body 6 Cam engaging part 7 Energizing body 8 Sliding surface 8a Down sliding surface
10 Grease reservoir recess
11 Grease reservoir recess
12 Operation unit
13 Display section

Claims (8)

  A hinge device that rotatably connects a first member and a second member, wherein the cam portion is provided on a first rotating body that rotates with the rotation of the first member, and with the rotation of the second member. A cam engaging portion provided on the rotating second rotating body is provided so as to be relatively rotatable with respect to each other, and is configured to be urged by the urging body to engage with each other so as to engage with each other. In the hinge device configured such that the rotation position of the first member and the second member is maintained by the engagement portion being energized or energized by the energizing body, A sliding surface of the second rotating body on which the cam portion slides is provided with a grease retaining recess, a length in the sliding direction of the cam portion, and the rotation center of the second rotating body. Is provided with an arc-shaped concave groove having a circular arc center on the sliding surface to constitute the grease reservoir concave portion. That hinge device.   The hinge device according to claim 1, wherein a plurality of the grease reservoir recesses are arranged in a radial direction from a rotation center of the second rotating body.   A hinge device that rotatably connects a first member and a second member, wherein the cam portion is provided on a first rotating body that rotates with the rotation of the first member, and with the rotation of the second member. A cam engaging portion provided on the rotating second rotating body is provided so as to be relatively rotatable with respect to each other, and is configured to be urged by the urging body to engage with each other so as to engage with each other. In the hinge device configured such that the rotation position of the first member and the second member is maintained by the engagement portion being energized or energized by the energizing body, The cam portion has a plurality of grease reservoir recesses on the sliding surface of the second rotating body that slides when rotating, and the plurality of grease reservoir recesses are arranged in a row in the sliding direction of the cam portion. A plurality of fronts arranged in parallel on the sliding surface and arranged in parallel in the sliding direction of the cam portion on the sliding surface Hinge device being characterized in that a plurality columns columns of grease reservoir recess from the center of rotation of said second rotary member in the radial direction.   The grease retaining recess is provided on a downward sliding surface of the cam engaging portion that slides when the cam portion is engaged with the engaging cam portion. The hinge apparatus of Claim 1.   The grease reservoir recess has a length in the sliding direction of the cam portion, and is configured by providing an arc-shaped concave groove on the descending sliding surface in which the rotation center of the second rotating body is an arc center. The hinge device according to claim 4, wherein   6. The grease retaining concave portion is provided at the bottom of the cam engaging portion formed by a concave portion in which the cam portion constituted by a convex portion is engaged with the concave and convex portions. The hinge apparatus as described.   In the rotation region where the cam portion engages with the cam engaging portion, a dropping action occurs when the cam portion slides with respect to a downward sliding surface provided in the cam engaging portion, and this dropping action is generated. A rotation biasing function for biasing the rotation of the first member and the second member by rotating the first member and the second member so that the cam portion is engaged with the cam member. In the rotation region engaged / disengaged from the joint portion, a rotation resistance is generated when the cam portion slides with respect to the sliding surface, and the rotation resistance causes the first member and the second member to rotate. The hinge device according to any one of claims 1 to 6, further comprising a free stop function that is in a free stop state in which the rotation is stopped at a position where the hand to be moved is released.   The main body part provided with the operation part or the display part on the upper surface is the first member or the second member, and the overlapping part provided with the display part or the operation part on the lower surface is the second member or the first member. Electronic equipment using a hinge device, wherein the end portions of the main body portion and the overlapping portion are pivotally connected by the hinge device according to any one of claims 1 to 7.

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