TWM328519U - Cam for hinge and hinge apparatus - Google Patents

Abstract

It is to provide a cam for hinge which is excellent in strength and wear resistance, and further, excellent in slipping character, and is usable for a long period without trouble, though it is compact. The present devise provides a cam for hinge which has solved those problems, and the cam for hinge is characterized by having a Vickers hardness in the range of HV 1200-1500, a surface roughness of 0.03-0.1μm and a friction coefficient of 0.04-0.1. The above problem is solved by a cam for hinge which comprises two cam pieces, one of which rotates against the other, wherein cam faces facing to each other of both of the cam pieces have a Vickers hardness in the range of HV 1200-1500, a surface roughness of 0.03-0.1μm and a friction coefticient of 0.04-0.1.

Description

M328519

VIII. New Description ^ [New Technical Field] This device relates to a hinged cam and a hinge device for folding a device such as a folding mobile phone, an electronic dictionary and a game machine. < [Prior Art] The hinge disclosed in Japanese Patent No. 347 1 743 is a second disk member which is continuously disposed along the same axis in a tandem manner, and is used as a member of a first disk member. The sliding cam member and a coil spring are formed. By inserting a shaft into the constituent members and fixing them together to form a slidable state, the sliding cam member can be forced by the elasticity of the coil spring to contact the second disc member at the sliding cam. A through space is formed between the piece and the back side, and a cutting groove for sliding is formed in the cylindrical body of the first dish. Therefore, the combination allows the sliding member of the first disk member to be exposed outside the sliding space and the sliding cutting groove which is cut in the axial direction from the front end of the cylindrical body. The state is moved in the axial direction for the opening and closing action of the second member (cover portion) of the hinge device when opening and closing, and fixing the folding device. Through such a configuration, only a simple The operation of inserting the constructed body onto the first and second hinge cylinders ensures engagement and nesting on the first and second hinge cylinders, and ensures that the first and second members can be opened. Rotating state. Therefore, the hinge for opening and closing and then fixing the folding device can be made faster -4-

M328519 is fast and easy to carry out. Furthermore, by providing a stopper plastic claw on the second disc member, it is ensured that there is no possibility of slipping off the body of the construction. In the hinge disclosed in Japanese Patent No. 2005-1401 52A, the metal portion or the ceramic material is used for powder injection molding to mold the cam portion and the concave cam portion, and the extremely precise size and High resistance to friction. In the hinge disclosed in Japanese Patent Publication No. 2002-276642A and Japanese Patent No. 2004-332919A, the cam of the hinge is made of a hard and iron-based sintered alloy (having a base material hardness of HV 500 or higher). Made, and the surface state of the cam is made to have a preset surface roughness (which is a surface roughness profile obtained by measuring the surface roughness within a measuring length of 0.8 mm. Draw a depth of 1 μηι a straight line parallel to a line passing through two or more cusps in the contour. The predetermined surface roughness is represented by summing the distances of the front straight lines through the peaks of the contours, which is 40- 80%). Furthermore, the cam has oil impregnation capability. By satisfying them, the hinge can exhibit a smooth motion in the initial stage of self-actuation. In order to obtain a cam for such a hinge, the ferrous base sintered alloy used is a carbon steel composition containing Cu and C, or such as Cr, Mo, V, W, and Ni or the like. These coarse powders are formed by powder compression molding, sintered, hardened and annealed, impregnated with a lubricant, and then subjected to barrel polishing. [New content] Folding mobile phones and other folding mobile devices must be one year-5- M328519 *月* ΐ正·1 1 One year of miniaturization, so the hinge for the opening part must also be miniaturized . In the hinge device described in Japanese Patent No. 3471743, in order to be miniaturized, the sliding cam member of the first disk member is inserted into the cylindrical body in an exposed state and cut in the axial direction from the front end. The sliding groove is used for sliding and is free to rotate in the axial direction. Therefore, when the diameter of the cylindrical body is reduced, the sliding cam member can secure its diameter due to the exposed portion of the sliding cutting groove. Therefore, the rotational torque can be effectively received. However, in order to further miniaturize 'the sliding cam member and the second disc member (hardness, wear resistance, etc.) must be improved. As described in Japanese Patent No. 2005-140152, it can be used. The sintered body of the ceramic powder material is used as a cam to achieve a hardening result which can improve the wear resistance. However, the ceramic sintered body is rather fragile and is liable to rupture the convex-concave portion of the cam during repeated opening and closing operations, which may reduce the torque. In the cams described in Japanese Patent No. 2002-276642A or Japanese Patent No. 2004-3 3 29 1 9A, the handling of opening and closing of their hinge devices can be improved by improving the surface roughness of the cam surface. However, it also has its limits. For example, when the diameter of the cam is set to 3 mm, the contact surfaces of the cams made of the ferrous base sintered alloy described in the above reference may be applied repeatedly. The card feels and the 40N spring force necessary for the free stop torque is tens of thousands of times, resulting in wear and reduced torque. -6 -

M328519 The purpose of this device is to solve these problems and provide a hinge cam which, although miniaturized, has excellent strength and wear resistance, and has excellent sliding characteristics and can be used for a long time. No reason

The device provides a hinged cam that overcomes the aforementioned problems, the cam of the hinge being characterized by having a Vickers hardness in the range of 1200 1500 1500, a surface roughness of 0.03-0. Ιμηη, and 0.04 -0.1 coefficient of friction. The Vickers hardness of HV 1200-1500, the surface roughness of 0.03-0.Ιμπι, and the coefficient of friction of 〇.〇4_0.1 are set to prevent wear and tear when repeated application of about 40 Ν spring force for tens of thousands of times. fracture. For example, by using a cam according to the hinge of the device as a hinge cam having a diameter of 3 - 4 mm for a mobile phone or the like, even in the case where a spring force of about 40 N is applied thousands of times, the contact surface It will not wear or wear, and it will prevent the torque from decreasing. In the cam of the device, the convex portion and the inner concave portion are formed on the mutually facing cam surfaces in the cylindrical cam member which is rotatable about the center axis and the other member. By engaging the convex portion with the inner concave portion, it can prevent the cam from acting. The outer convex portions and the inner concave portions are formed substantially in the radial direction, and the number of each of them is usually one or two. These cam members have a diameter of 3-4 mm. The width (length along the axial direction) varies depending on its use or the like, and is usually 1 · 5 - 2 · 5 mm, but is not particularly limited thereto. The cam of this device has a dimension of HV 1 200- 1 500 00 on the cam surface. M328519

Hardness. The surface of the cam surface has a rough seam of 0.03-0. Ιμπι and a coefficient of friction of 0.04-0.1. As for the material of the cam members, ceramic is preferred, and among them, chromium oxide is particularly suitable. The oxidized chromium-based ceramic material has an oxidation pin containing tombs which is 60% by weight or more, preferably 80% by weight or more, more preferably 9 % by weight or more. High's particularly good is 95% by weight or more. As for other components other than chromium oxide, for example, cerium oxide and aluminum oxide may be mentioned. The cam of the device can be molded, powder pressed, CIΜ or the like, dislocated by a ceramic coarse powder to which other components are selectively added, for example, an oxidation pin powder in a ceramic material based on chromium oxide. And then sintered to make it. The sintered body is further subjected to barrel polishing to obtain a rough surface roughness of 0.1 μm or less. Further, in order to obtain a friction coefficient of 0·1 or less, a lubricant can be applied to the surface of the cam. The cam of the device can be used in a variety of hinge devices. For example, it may be used in a hinge device including a casing, a friction plate, a coil spring, a sliding cam member, a rotating cam member, and a shaft member extending therethrough; the casing is in the form of a cylinder. Having a bottom portion for rotatably inserting the shaft member therein; the friction plate is fixed to the shaft member to interlock with the rotation of the shaft member' and is disposed in a housing The inner bottom surface contacts -8- M328519 in a poor positive position on January 4th, in order to generate friction therebetween when the shaft member is rotated; the coil spring is inserted into the outer casing; the sliding cam a member rotatably inserting the shaft member and slidable along an axial direction of the outer casing under the force of the coil spring; the rotating cam member being fixed to the shaft member and the shaft member The rotations are interlocked together and are rotatable relative to the sliding cam member and relative to the outer casing; a φ cam portion is formed on both the sliding cam member and the rotating cam member, and is According to this Rotating the cam member to intermesh or separate from each other; and the cam surfaces facing each other on the two cam members have a Vickers hardness in the range of HV 1 200 - 1 500, and a surface roughness of 0.03-0 · Ιμπι Degree, and a coefficient of friction of 0.04-0.1. In the hinge device including the outer casing, the coil spring, the sliding cam member and the rotating cam member, the hinge device is characterized by the following constitution; • β ( a ) the outer casing has a positioning inner wall on its inner side wall a recess or a convex portion. (b) The coil spring is sleeved in the outer casing. (c) The peripheral shape of the sliding cam member can be inserted into the inner side wall of the outer casing and can be slid in the axial direction in the outer casing by the pressing of the coil spring. (d) the periphery of the sliding cam member has an outer convex portion or an inner concave portion which can be inserted into the positioning concave portion or the convex portion formed on the inner side wall of the outer casing by inserting the outer convex portion or the inner concave portion The -9-M328519 rotation relative to the housing is prohibited within the unit. (e) The rotating cam member is rotatable relative to the sliding cam member and the outer casing. (f) The cam portion is formed between the slide cam member and the rotary cam member, and the like can be engaged or disengaged from each other according to the rotation of the rotary cam member. (g) The cam portion formed on the slide cam member protrudes outward from the outer periphery of the slide cam member. (h) The cam portion formed on the rotary cam member has a length in the diametrical direction corresponding to the cam portion on the slide cam member. In such a hinge device, by providing a friction plate that allows the shaft member to pass through in contact with the bottom surface of the inner casing, the friction coefficient of the cam surface can be increased, so that it can be at the convex portion of the cam. Any other position than the position where the inner recess engages can be parked. The friction plate rubs against the inner bottom side surface of the outer casing by rotation with the shaft member and generates friction. Therefore, the friction generated between the friction plate and the outer casing can supplement the friction reduction of the cam, and the effect of free parking can be achieved. Although the application of the cam of this device is not particularly limited, it is preferably used, for example, on the hinge portion of the mobile phone. [Embodiment] Hereinafter, a cam of a hinge which is an example of the device will be described with reference to the drawings. Figure 1 is a schematic external view showing a mobile telephone, wherein the -10-M328519 correction supplements the use of a hinge device including an example of a cam of the device, wherein the hinge device 1 is inserted through a body 2 And the cylindrical bearing members 3, 5 protruding from the end of a cover portion 4 are rotatably coupled to the cover portion 4 in the body portion 2 as shown in Figs. 2 and 3, the hinge device 1 includes a casing 10 A sliding cam member 20, a rotating cam hinge 30, a hook member 40, and a shaft member 50 inserted therethrough. • See Figures 3 and 4 for the housing! The tether is a cylindrical member' having a bottom, and a circular through hole 1 1 for insertion of the shaft member 50 (only shown in Fig. 4) is formed at the center of the end surface of the base. The cylindrical body of the outer casing 10 includes a coil spring 60 for urging the sliding cam member 20 and the like. A release groove 12 can be formed on the periphery of the outer casing 10 by cutting from the orifice 〇 a to a predetermined position in the axial direction. On the inner periphery of the outer casing 10, a recessed portion 13 for positioning is formed from the orifice 1 〇 a cut to a predetermined position in the axial direction. Further, a groove portion 14 extends in the axial direction on the outer periphery of the outer casing 1 . The recessed portion 13 for positioning and the groove portion 14 are disposed at a distance to avoid excessively thinning the thickness of the outer casing 10. As shown in Figs. 3 and 5, the slide cam member 20 is a cylindrical member slidably inserted into the opening 1 〇 a of the outer casing 1 . A circular through hole 21 into which the shaft member 50 is inserted is formed in the middle of the slide cam member 20; L·. Further, the sliding cam member 20 is provided with a tapered outer cam member 23 which is on the side opposite to the outer casing 1 (hereinafter referred to as a first projection -11 - M328519).

The end of the wheel surface 22) protrudes. The convex cam portions 23 extend symmetrically from the center position in the radial direction, and the like

The end protrudes from the periphery of the sliding cam member 20. The protruding portion 23a of the convex cam portion 23 is slidable within the release groove 12 of the outer casing 10. Further, an outer convex portion 24 which is shaped like a rib is formed on the periphery of the sliding cam member 20 in the axial direction. The positioning outer convex portion 24 is engaged with the positioning inner concave portion 13 on the outer casing 1 to restrict the rotation of the sliding member which is slidable along the positioning inner concave portion 13. The sliding cam member 20 is provided with a ring-shaped gate 25 surrounding a circular through hole 2 1 located at the center of the cam member, such as a longitudinal sectional view of FIG. 5(d) and a bottom in FIG. 5(e) The view is shown for extremely accurate dimensional accuracy (eg roundness, etc.). At this time, it is provided with an adhesive exterior, so that the through hole 2 1 is not adversely affected by the brake cutting. The slide cam member 20 is provided with an annular molding portion 26 which becomes the same surface as the upper surface of the cam portion surrounding the through hole 21. This is because of the following reasons. That is to say, the sintering operation is carried out after the powder molding process. At that time, when the upper surface portion is on the upper side, the protruding portion 23a on the outer periphery of the outer cam portion 23 is slightly suspended due to its weight. Then, the cam portion 33 is brought into contact with the cam portion 23 at the inner periphery to reduce the rotational torque caused by the short sliding radius. Therefore, it is required that the cam surface is in the bottom side. However, since the area of the convex cam portion 23 is small relative to the upper surface, it will be unable to be supported. Therefore, by forming a molding table that does not contribute to torque at the same height as the inner periphery -12 - M328519

The strip is replenishing the surface, even if the sintering operation is carried out with the cam surface being on the bottom side, the weight of the cam will still be supported. The molding of the annular molding portion 26 is extremely difficult to carry out by press molding, but it is simple to mold by powder. The function of the annular forming portion 26 is that when the through hole 2 1 of the sliding cam member 20 slides along the central axis, the length of the guiding guide is increased, and the sliding can be made easy to tilt due to the strong spring force. The cam member 20 performs a sliding motion. In addition, due to the rotating cam member

The area of the upper surface of 20 is increased, which is also the case. Alternatively, even when the upper surface side is on the bottom side, the suspension does not occur due to the same planar shape. As shown in Figures 3 and 6, the rotating cam member 30 has a second cam surface 32 which is engageable with the first cam surface 22 of the sliding cam member 2A. The rotary cam member 30 is a cylindrical member, and an elliptical through hole 31 is formed at the center for the shaft member 50 to be inserted. On the second cam surface 32 of the rotary cam member 30, a concave cam portion 33 is formed which engages the cam portion 23 of the slide cam member 20. The concave cam portion 3 3 is also tapered to have an oblique angle similar to the convex cam portion 23, and they are blocked by continuous friction when engaged. For the purpose of fixing the rotating cam member 30 without rotating relative to the cover portion 4, a groove portion 34 is provided on the periphery thereof. As shown in Figs. 3 and 7, the hook member 40 is provided at the center with an elliptical through hole 41 for the shaft member to be inserted. Further, the hook member 40 is provided with a pair of claw-shaped hook portions 42, and for example, it can be hooked on the cylindrical bearing member 5 provided on the cover portion 4 of the mobile phone for fixing -13-

M328519 will be fixed. Of course, the hook member 40 is not limited to the shape shown in Fig. 7, and may be of various shapes.

As already mentioned above, the shaft member 50 has a constituent portion through which each member of the hinge device passes. As shown in FIG. 3 and FIG. 8 , the shaft member 50 is provided with a flange portion 5 1 , a first round rod portion 5 2 , and a first fixed portion 5 3 from the end of the base portion. A second round rod portion 5 4 , a second fixed portion 5 5 , and a narrowed end portion 56 . The flange portion 51 of the shaft member 50 has a diameter that is engageable with the base end surface of the outer casing 1 。. The first round bar portion 52 is a portion formed into a circular cross section and extends from the center of the flange portion 51. The first round bar portion 52 is rotatably inserted into the circular through hole 11 of the outer casing 10. The first fixing portion 53 is a portion formed in an elliptical cross section behind the first round bar portion 52. A friction plate 62, which will be described later, is fitted over the first fixing portion 53. The second round bar portion 54 is a rod-shaped portion formed into a circular cross section, and is inserted into the coil spring 60, the circular through hole 2 1 of the sliding cam member 20, and the like. The second fixing portion 55 is a rod-like portion formed to have an elliptical cross section, and is inserted into the elliptical through holes 3 1 and 4 1 of the rotating cam member 30 and the hook member 40. The narrowed end portion 5 6 has a configuration in which the hinge device can be shrunk when the hinge device is assembled, or a ring-shaped member is used to prevent the members from slipping off.

In each of the foregoing members, the sliding cam member 20 and the rotating cam member 30 are made of a chrome oxide-based ceramic material, and include zirconia having a molar percentage of 97% and cerium oxide having a molar percentage of 3%. And has in HV -14-

M328519 1 The Vickers hardness in the range of 200- 1 500, the cam surfaces 22, 23 have a surface roughness of 0.03-0.1 μηι, and the cam surfaces have a friction coefficient of 0.04-0.1. The diameter of the two cam members 20, 30 is 3 mm. These cam members 20, 30 are prepared by a conventional method of injection molding, dewaxing, sintering, and then barrel polishing through CIM, and lubricant is applied to the cam surfaces 22, 32. All other components are made of stainless steel or plastic.

Next, referring mainly to Figs. 2 and 3, the detailed structure of the hinge device 1 and the assembly of each component will be described. In the hinge device, the shaft member 50 is inserted into the circular through hole 1 1 of the outer casing 10 through a plastic plastic spacer 61. By inserting the shaft member 50 through the plastic spacer 61 and the base end of the outer casing 10 until it comes into contact with the flange portion 51, each portion of the shaft member can be disposed in each member. In the case where the outer casing 1 is in contact with the flange portion, first, the first round portion 5 2 of the shaft member 50 is first inserted into the base end of the plastic spacer 61 and the outer casing 1 . After the outer casing 10, the shaft member 50 is inserted into the friction plate 62. A permanent through hole 62a is formed at the center of the friction plate 62, which meshes with the first fixed portion 53 of the shaft member 50. That is, when the shaft member is inserted, the friction plate 62 is fitted over the first fixing portion 53 and interlocked with the rotation of the shaft member 50. The second round bar portion 54 of the shaft member 50 is sequentially inserted into the spring washer 63, the coil spring 60, and the slide cam member 20, and is positioned in the cylindrical portion of the outer casing 10. At this time, the sliding cam member 20 is sleeved to be -15-

M328519 causes the positioning convex portion 24 to be engaged with the positioning concave portion 13 of the outer casing 10,

The projecting portion 23a of the outer cam portion 23 is engaged in the release groove 12 of the outer casing 1''. After being inserted into the outer casing 1 and the sliding cam member 2, the shaft member 50 is further inserted into the rotating cam member 30 by the second fixing portion 55. The rotating cam member 30 is sleeved on the shaft member 50 so that the second cam surface 32 comes into contact with the first cam surface 22 of the sliding cam member. Therefore, on the shaft member 50, the cam portion 23 of the first cam surface 22 engages in the concave cam portion 3 3 of the second cam surface 32. Further, the hook member 40 is inserted into the second fixing portion 5 5 of the shaft member 5 。. It is configured such that the rotary cam member 3 and the hook member 4 are bored through the elliptical through holes 31, 41 and fixed to the second fixed portion 55 of the shaft member 50. Therefore, the rotating cam member 3 〇 and the hook member 4 转动 rotate with the shaft member 5 during the opening and closing of the cover portion 4 which will be described later. Finally, the spacer 6 4 is inserted over the narrowed end 56 of the shaft member 5 。. After the spacer 64 is placed, the end of the narrowed end portion 54 is wrinkled by a hammer. The annular member is used to prevent the members from slipping off. This hinge assembly is completed by assembling the components in accordance with the process described. As shown in Fig. 9(a), a guide rail 3a is provided on the inner periphery of the cylindrical bearing member 3. The hinge device 1 is inserted into the cylindrical bearing member 3, and the groove portion 14 is engaged with the guide rail 3a to fix the outer casing 丨〇. In the solid state, the hook member 40 and the rotating cam member 3 project from the cylindrical bearing member 3 and are inserted into the cylindrical bearing member 5 of the cover portion 4. -16-

The M328519 is provided with a guide rail 5 a similar to the cylindrical bearing member 3. The groove portion 34 is engaged with the guide rail 5a of the cylindrical bearing member 5 to fix the rotating cam member 30. Further, in this hinge device, the hook portion 4 2 of the hook member 40 is hooked at the end of the guide rail 5a. With the above configuration, the cover portion 4 can be coupled to the body 2 by the key device 1. In the illustrated example, the body 2 and the cover 4 of the telephone are connected by the hinge device. In this case

In the configuration, the body 2 of the mobile phone is engaged with the casing 1 ,, and the cover 4 is engaged with the rotating cam member 30 and the hook member 40. However, it is also possible to use the reversed configuration to engage the body 2 with the rotating cam member 30 and the hook member 40, and the cover portion 4 is engaged with the outer casing 1''. The first drawing is an enlarged view showing the state before the rotation, and the 1st drawing is an enlarged view showing the state during the rotation of the sliding cam member 20 and the rotary cam member 30 of the hinge device. Next, the operation of the hinge device will be described mainly with reference to Fig. 1 and Fig. 11. As previously mentioned, the hinge device 1 connects the body 2 and the cover 4 of the mobile phone together in an openable and closable manner. When the body 2 and the cover portion 4 of the mobile phone are in the closed state, as shown in FIG. 1 , the concave cam portion 3 3 of the rotating cam member 30 is fixed to the cam portion of the sliding cam member 20 23 on. At this time, the slide cam member 20 is urged by the coil spring 60 inserted into the casing 1 to maintain the state in which the rotation of the rotary cam member 30 is restricted. When the cover portion 4 of the mobile phone is opened, the cam member 30 and the hook structure -17- are rotated.

The M328519 member 40 rotates in accordance with the movement of the cover portion 4 in the opening direction. Since the rotating cam member 30 and the hook member 40 are sleeved on the second fixing portion 55, the shaft member 50 is simultaneously rotated. When the rotating cam member 30 starts to rotate, the sleeve between the concave cam portion 3 3 and the cam portion 23 of the sliding cam portion 20 gradually slides away. As shown in Fig. 1, the concave cam portion 33 pushes the convex cam portion 23 rearward along the tapered shape with the sliding. Therefore, the rotary cam member 30 slides the slide cam member 20 toward the outer casing 10 while rotating. At this time, on the slide cam member 20, the projecting portion 23a of the outer cam portion 23 slides in the release groove 12 of the outer casing 10. If the rotary cam member 30 is further rotated, the concave cam portion 3 3 is again engaged with the cam portion 23 when rotated to 180 degrees (the state in which the cover portion 4 is opened at an angle of 180 degrees). When the concave cam portion 33 is again engaged with the convex cam portion 23, the convex cam portion 23 will fall into the concave portion of the concave cam portion 33 due to the pressing of the coil spring 60. This action of the convex cam portion 23 at this time produces a click sound that is transmitted to the user. Here, the rotational torque when the rotary cam member 30 is rotated is also transmitted to the slide cam member 20 which is in contact therewith. Therefore, the rotational torque transmitted from the rotating cam member 30 exerts a rotational force on the sliding cam member 20. The rotational power acting on the slide cam member 20 causes the positioning outer convex portion 24 provided on the outer peripheral edge to come into contact with the positioning inner concave portion 13 of the outer casing 1A. Therefore, the positioning recessed portion 13 of the outer casing 1 接收 receives the rotational power due to contact with the positioning outer convex portion 24. -18- M328519

Therefore, it is preferable that the positioning outer convex portion 24 and the positioning inner concave portion 13 have a structure that extends relatively long in the axial direction. By extending the positioning outer convex portion 24 and the outer convex cam portion 2 3 in the axial direction, the rotational power can be more dispersed. Further, the positioning concave portion 13 and the positioning outer convex portion 24 provided on the outer casing 1 and the sliding cam member 20 can be reversely interchanged. The positioning outer protrusion formed on the outer casing 1 can be engaged with the sliding cam member 20

The positioning is used inside the recess. Further, preferably, the outer peripheral surface is formed in a shape and size which can be inserted into the inner peripheral surface of the outer casing 1 by a certain frictional force. With such a configuration, the surface contact between the sliding cam member 20 and the outer casing 10 generates a certain frictional force. Therefore, the rotational torque from the rotating cam member 30 can be dispersed in the contact portion between the inner periphery of the outer casing 1 and the outer periphery of the sliding cam member 20. Further, when the rotary cam member 30 is stopped during the rotation (the state in which the intermediate position during the opening or closing operation of the cover portion 4 is stopped), the cam portion 23 of the slide cam member 20 is caused by the coil spring 60 The second cam surface 3 2 of the rotating cam member 30 is pushed by the spring force. At this time, the friction plate 62 in the outer casing 10 is pressed by the coil spring 60 through the spring washer 63. Therefore, the friction plate 6 2 acts as a brake to restrict the rotation of the rotary cam member 30 and the shaft member 50, and it will be fixed at the stop position. According to the aforementioned hinge device, the axial length is inserted into the release groove 1 2 of the outer casing 10 by the outer cam portion 23 of the sliding cam member 20 -19-

The M328519 is shortened, so it can achieve miniaturization of this device. Furthermore, the hinge device of the present device is of course not limited to the foregoing embodiments, but can be applied to various applications and improvements as needed. For example, although in the present embodiment of the hinge device 1, the convex cam portion 23 is configured to be engaged with the concave cam portion 33 by the rotation of the rotary cam member by 18 degrees, it may be configured to It can be engaged at any position where it is rotated. The form of the convex cam portion 23 and the concave cam portion 33 can be designed in various forms depending on the purpose, such as the position during the rotation. The cam of this unit can be applied to a variety of hinges that apply cam action. Examples of such hinges are switches for personal computers and car sounds and users of folding mobile phones. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an external view showing a schematic structure of a mobile phone to which a cam of a hinge of the presenting apparatus is applied. Fig. 2 is a view showing the structure of a hinge device to which a cam of the hinge is coupled, wherein (a) is a front view and (b) is a side sectional view. Fig. 3 is an external view showing the exploded state of the aforementioned hinge device. Fig. 4 is a view showing the type of the outer casing of the aforementioned hinge device. Fig. 5 is a view showing the type of the sliding cam member of the aforementioned hinge device. Figure 6 is a view showing the type of the rotating cam member of the aforementioned hinge device -20- M328519

figure. Fig. 7 is a view showing the form of the hook member of the aforementioned hinge device. Fig. 8 is a view showing the pattern of the shaft member of the aforementioned hinge device. Fig. 9 shows the state in which the aforementioned hinge device is coupled to a mobile phone. • The first drawing is an enlarged view showing the state of the sliding cam member and the rotating cam member before the aforementioned hinge device is rotated. Figure 11 is an enlarged view showing the state of the sliding cam member and the rotating cam member during the rotation of the aforementioned hinge device. [Main component comparison table] 1 β·Hinging device 2: Main body 3: Cylindrical bearing member 3a: Guide rail 4: Cover portion 5: Cylindrical bearing member 5 a: Guide rail 10: Housing 1 0 a : Hole 1 1 : Circular through hole 1 2 : Release groove - 21 - M328519 Positioning inner recess groove part sliding cam piece circular through hole first cam surface outer convex cam part z protruding part positioning outer convex part gate forming part rotating cam piece Elliptical through hole second cam surface concave cam portion groove portion hook member elliptical through hole hook portion shaft member flange portion first round rod portion first fixed portion second round rod portion second fixed portion -22

M328519 5 6 : Shrinking end . 60 : Coil spring 61 : Plastic gasket 6 2 : Friction plate 62a : Through hole 63 : Spring gasket " 64 : Gasket

-twenty three-

Claims (1)

M328519 Supplementary Nine, the scope of application for patents. 1 · A hinged cam comprising two cam members, one of which is rotatable relative to the other, wherein the cam surfaces facing each other in the two cam members have a position Vickers hardness in the range of HV 1 200- 1 5 00, surface roughness of 0.03-Ο.ίμιη, and coefficient of friction of 0.04-0.1. 2. The hinged cam of claim 1, wherein the two cam members are made of a ceramic material. • A hinged cam according to the scope of claim 2, wherein the ceramic material is based on an oxidized pin. The hinged cam according to claim 3, wherein the ceramic material is based on an oxidized pin, has a chromium oxide content of 90% by weight or more, and contains at least cerium oxide. 5. The hinged cam of claim 1, wherein the cam surface is coated with a lubricant. 6. The hinged cam of claim 1, wherein the cam members have a diameter of 3 to 4 mm. The hinge cam according to any one of claims 1 to 6, which is coupled to a mobile phone. 8. A hinge device comprising a housing, a friction plate, a coil spring, a sliding cam member, a rotating cam member, and a shaft member extending therethrough; the housing is in the form of a cylinder having a bottom portion The shaft member is rotatably inserted therein; the friction plate is fixed to the shaft member and rotates with the shaft member - 24 M328519 is locked together and disposed at a position in contact with the bottom surface of the outer casing for generating friction therebetween when the shaft member is rotated; the coil spring is inserted into the outer casing; the shaft member The sliding cam member rotatably inserted therein is slidable in the axial direction of the outer casing by the force of the coil spring; the rotating cam member is fixed to the shaft member to be coupled with the shaft member Turn Dynamically interlocking together 'and rotatable relative to the sliding cam member and relative to the outer casing; cam portion ' is formed on both the sliding cam member and the rotating cam member ' and according to the rotating cam member Rotating and meshing with each other; and the cam surfaces facing each other on the two cam members, having a Vickers hardness in the range of 1200 to 1500, a surface roughness of 〇·〇3_〇1μηι, and 0 · 0 4 - 0 · 1 coefficient of friction. -25- M328519 Patent Application No. 96200671 Chinese Pattern Revision Page Republic of China 96 Year 11 First Picture Revision on March 29 M328519 七明说单图-简字符U: The table is the map of the generation of the map. The table is represented by the map: the representative of the map is set to one or two u^r0 κ (ν κίν nursery set S installed J key release hinge ί shell external The position part wheel is convexly convex and convex, and the face part table: the concave wheel oa is convex 1 with one, the first part is protruding, the groove is KH __U, the mouth is convex and the external shape is used. Round fixed ellipse 'bit t— RH piece vertical wheel wheel convex convex concave concave inner position, component groove structure groove shaft member positioning part hook edge •• protruding hook piece pad, position plastic 7J B, standing Mouth: fixed 61 solid, one second spring first bomb:: rotary 3 5 tired 5 5 position 60 7J ZJ vertical mouth " pole end, round end plate. 1 2 slitting sheet 1st shrinking pad 2 4 6 2 4 5 5 5 6 6 6 a hole through the piece pad with spring psi bomb