JP2004204979A - Hinge device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hinge device suitable for a two-folded type portable telephone. <P>SOLUTION: The hinge device is to connect a first member and a second member relatively openable and closable. The hinge device is composed of a shaft having a flange part on one end part, a case body rotatably provided while being locked by one end part of the shaft allowing the shaft to be inserted in a central part in an axial direction, a fixed cam having a cam part on one end part provided on one side in the case body being prevented from rotating by the shaft, a fixing member having a rotation-stopping means on an outer periphery mounted to a free end side of the shaft outside the case, a slider cam having the cam part on a side facing the cam part of the fixed cam slidably provided in the axial direction, allowing the shaft to be inserted in the central part in the axial direction, being prevented from rotating by the case body, and a compression spring elastically provided between the slider cam and the fixing member while being wound around the shaft. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a hinge device particularly suitable for a small information terminal such as a mobile phone.
[0002]
[Prior art]
Among small information terminals, for example, a two-fold type in which a keyboard body and a display device are separately formed, and both are relatively openably and closably connected using a hinge device, such as a mobile phone. is there.
[0003]
2. Description of the Related Art Conventionally, as a hinge device for a two-fold type mobile phone, the one disclosed in the following patent document is known.
[0004]
[Patent Document 1] Japanese Patent Laid-Open Publication No. 2000-337008
Patent Document 1 discloses a shaft having a locking portion at one end, a case body inserted through the shaft in the axial direction of a central portion and locked by the locking portion, and an opening of the case body. A slider cam, which is slidably locked in the axial direction in a key groove provided on the end side, has a cam portion on one end surface, and has the shaft penetrated in the axial direction of the central portion, and faces a cam portion of the slider cam. A rotating cam having a cam portion on the end surface thereof and having the shaft inserted in the axial direction of a central portion thereof, and a rotating cam, which is housed in the case body while being returned and wound around the shaft, between the case body and the rotating sliding cam. It consisted of a compression spring mounted between them.
[0006]
[Problems to be solved by the invention]
In the above-described conventional hinge device, the lubricant applied to each cam easily leaks from the key groove or the open end of the case body during use, and the force associated with use is reduced by the keyway portion of the case body. And the case is added to the open end side of the case, so that there is a disadvantage that a problem easily occurs in strength.
[0007]
SUMMARY OF THE INVENTION An object of the present invention is to provide a hinge device which prevents a lubricant from leaking out of a case body, increases strength and increases durability, and is particularly applicable to a folding type mobile phone. is there.
[0008]
In the following, a case where the present invention is applied to a two-fold type mobile phone will be described. However, it is needless to say that the hinge device according to the present invention can be applied to a small portable information terminal other than the two-fold type mobile phone. .
[0009]
[Means for Solving the Problems]
In order to achieve the above-described object, the present invention is to connect a first member and a second member so as to be relatively openable and closable, and comprises: a shaft having a flange at one end; A case body inserted in the axial direction and rotatably provided at one end of the shaft and rotatably provided, and a cam provided at one end provided inside the case body with rotation restricted by the shaft. A fixed cam having a portion, a fixed member having a rotation preventing means attached to the outer periphery of the case attached to the free end side of the shaft on the free end side, and the shaft being inserted in the axial direction of the central portion to restrict the rotation of the case body. A slider cam having a cam portion on the side opposite to the fixed cam slidably provided in the axial direction while being slidably provided, and a coil spring rewindingly wound around the shaft between the slider cam and the fixed member. A compression spring, and the case body is formed as a full throttle having a rotation preventing means provided on the outside and inside thereof, and the cam portion on the fixed cam side projects relatively high toward the slider cam side. The slider cam side cam portion has a convex portion having a gentle slope and a steep slope on one side.
[0010]
In this case, according to the present invention, the case body has a side wall supported by the shaft, and a slide washer can be interposed between the fixed cam and the flange of the shaft on both sides of the side wall. .
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described below in detail with reference to the drawings. In FIG. 1, the one indicated by the reference sign 1 is a two-fold type mobile phone, and the one indicated by the reference sign 2 is indicated by the keyboard body constituting the first member and the reference sign 3. This is a display device comprising, for example, a liquid crystal display device constituting the second member.
[0012]
The hinge devices A, A according to the present invention connect the keyboard body 2 as the first member and the display device 3 as the second member so as to be relatively openable and closable. It is mounted between the mounting portions 2a, 2a and the mounting portion 3a of the display device 3. Although a pair of hinge devices A, A are used in the drawing, one hinge device may be used. Since the hinge devices A, A shown in FIG. 1 are symmetrical and have the same configuration, only the configuration of one hinge device A will be described below.
[0013]
2 to 10, what is indicated by the reference numeral 5 is a shaft made of SUM24L, which is carburized and quenched. The shaft 5 has a flange 5a at one end, and the shaft 5 A medium diameter portion 5d having a large diameter portion 5b and having a deformed portion 5c following the large diameter portion 5b, a small diameter portion 5e following the middle diameter portion 5d, and a radial direction provided at one end of the small diameter portion 5e. Has a deformation mounting portion 5g having an insertion hole 5f.
[0014]
The one indicated by the reference symbol 6 is a case body. The case body 6 has a drum-shaped cross-section with one end open by providing a pair of flattening portions 6a, 6a in the outer peripheral axis direction, and a shaft is provided in a bearing hole 6c provided in a side wall 6b. The large diameter part 5b of 5 is axially inserted, and is rotatably locked by the flange part 5a so as not to come out in the axial direction. A sliding washer 7 is interposed between the flange 5a and the side wall 6b. A fixed cam 8 is attached to the deformed portion 5c of the middle diameter portion 5d of the shaft 5 while inserting the deformed portion 5c into the deformed insertion hole 8a, and between the fixed cam 8 and the side wall 6b. The slide washer 9 is interposed by inserting the medium diameter portion 5d into an insertion hole 9a provided in the axial direction of the center portion.
[0015]
On the open end side of the case body 6, a detent mounting part 5 g provided on the free end side of the shaft 5 is inserted into and engaged with a deformed mounting hole 10 a provided in the axial direction of the central portion thereof, and a detent means 10 b is provided on the outer periphery. The provided fixing member 10 is mounted so as not to come off by the mounting pin 11 and to rotate together with the shaft 5. A slider cam 12 is disposed at a position facing the fixed cam 8 in the case body 6 such that the small diameter portion 5e of the shaft 5 is slidably inserted into an insertion hole 12a provided in the axial direction of the center portion. A compression spring 13 is elastically provided between the slider cam 12 and the fixed member 10 by being rewinded around the shaft 5 and the small-diameter portion 5e, and constantly presses the slider cam 12 toward the fixed cam 8.
[0016]
On the outer periphery of the slider cam 12, a rotation preventing means 12b composed of a flat portion is provided, and the opposing surfaces of the fixed cam 8 and the slider cam 12 are provided with a convex portion 14a, a concave portion 14b, a convex portion 15a, and a concave portion, respectively. Cam portions 14 and 15 made of 15b are provided. Although not shown, a viscous lubricating oil such as silicone oil is applied to the sliding contact portions of the cam portions 14 and 15.
[0017]
Then, as shown in FIGS. 1, 2 and 5 in particular, the side of the case body 6 of the hinge device A is inserted into and engaged with the deformation mounting hole 3b provided in the mounting portion 3a of the display device 3, and the fixed cam 11 Is inserted and fixed in a modified mounting hole 2b provided in the mounting portion 2a of the keyboard body 2, and the assembly of the hinge devices A, A is completed.
[0018]
Therefore, as shown in FIG. 5, when the display device 3 as the second member is closed with respect to the keyboard body 2 as the first member, as shown by the arrow (a) in FIG. The convex portion 15a of the cam portion 15 of the slider cam 12 is in a state where the convex portion 15a of the cam portion 14 of the fixed cam 8 is partially recessed. When the display device 3 as the second member is opened with respect to the keyboard body 2 as the first member from this state, the case body 6 rotates together with the mounting portion 3a of the display device 3, and the cam portion 14 of the fixed cam 8 is rotated. 11 moves to the gentle climbing slope 15c of the slider cam 12 as shown by arrows (b) and (c) in FIG. 11, as shown by arrow (d) in FIG. 11. To 122 °. After 122 °, the convex portion 14a of the cam portion 14 of the fixed cam 8 falls into the concave portion 15b of the cam portion 15 of the slider cam 12, and automatically becomes 160 ° as shown by the arrow (e) in FIG. Opened until.
[0019]
When closing the opened display device 3, as shown in FIG. 11, the convex portion 14 a of the cam portion 14 of the fixed cam 8 encounters a resistance when the concave portion 15 b of the cam portion 15 of the slider cam 12 escapes. However, after that, the convex portion 14a of the cam portion 14 of the fixed cam 8 goes down the inclined surface 15c of the cam portion 15 of the slider cam 12, so that it is smoothly closed to 0 ° by the pressing force of the compression spring 13. .
[0020]
As another embodiment, the case body can be attached to the attachment part on the keyboard body side, which is the first member, and the surroundings provided outside and inside the case body, outside the fixed member, and outside the slider cam are provided. The stopping means is not limited to the above-described embodiment. Further, the flange of the shaft may be provided in a direction opposite to that of the above-described embodiment, and the case body may be configured to be locked by an E-ring. Further, the shapes of the deformed portion, the deformed mounting portion, and the deformed insertion hole of each shaft of the fixed cam and the fixed member are not limited to those of the embodiment, but may be various known shapes. As for the material of the shaft, the case body, the fixed cam, the fixing member, and the slider, the material of the shaft, the fixed cam, and the slider cam requires strength and wear resistance. Therefore, a hard metal material is preferable. However, the present invention is not limited to the embodiment. If necessary, it can be made of a material such as SUS or POM.
[0021]
Although the slider washer is used to enhance the slidability, it is optional to use it at the same time as a friction washer. The mounting pin, which is a means for fixing the shaft and the fixing member, could be omitted by providing a flange on the side of the shaft.
[0022]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be created.
[0023]
According to this structure, the case body is in the shape of a full throttle, and the sliding cam for applying the lubricant and the respective cam portions of the sliding cam and the fixed cam are provided inside the case body. As a result, it is possible to prevent the lubricant from leaking to the outside during use as much as possible.In addition, the pressure contact of each cam portion near the center of the shaft, friction rotation, etc. Since the force is received, the force can be efficiently dispersed, the loss of the rotation / sliding force can be reduced, and the effect of increasing the wear resistance and the durability can be obtained.
[0024]
Further, according to the present invention, the side wall of the case body which rotates in a press-contact state between the flange portion of the metal shaft and the fixed cam is prevented as much as possible, and the durability is improved. The effect that it can raise can be produced.
[Brief description of the drawings]
FIG. 1 is a plan view of a portable telephone using a hinge device according to the present invention, in which a keyboard body as a first member and a display device as a second member are opened.
FIG. 2 is a front view of the hinge device according to the present invention.
FIG. 3 is a right side view of the hinge device shown in FIG. 2;
FIG. 4 is a left side view of the hinge device shown in FIG. 2;
FIG. 5 is a front sectional view of the hinge device shown in FIG. 2;
FIG. 6 is a front view of a shaft of the hinge device shown in FIG. 2;
FIG. 7 is a plan view of a fixed cam of the hinge device shown in FIG. 2;
8 is a plan view of a fixed cam of the hinge device shown in FIG.
FIG. 9 is a right side view of a fixed cam of the hinge device shown in FIG. 2;
FIG. 10 is a left side view of the slider cam of the hinge device shown in FIG. 2;
FIG. 11 is an explanatory diagram for explaining the movement of the cam portion of the slider cam with respect to the cam portion of the fixed cam of the hinge device shown in FIG. 2;
FIG. 12 is a longitudinal sectional view for explaining the movement of the hinge device shown in FIGS. 2 and 5;
[Explanation of symbols]
A Hinge device 1 Mobile phone 2 Keyboard body 2a Attachment part 3 Display device 3a Attachment part 3b Deformation attachment hole 5 Shaft 5a Flange part 5b Large diameter part 5c Deformation part 5d Medium diameter part 5e Small diameter part 5f Insertion hole 5g Deformation attachment part 6 Case Body 6a Detent means 6b Side wall 6c Bearing hole 7 Sliding washer 8 Fixed cam 8a Deformed insertion hole 9 Slide washer 9a Insertion hole 10 Fixed member 10a Deformed mounting hole 10b Detent means 11 Mounting pin 12 Slider cam 12a Insertion hole 12b Detent means 13 Compression spring 14 Cam part 14a Convex part 14b Concave part 15 Cam part 15a Convex part 15b Concavity 15c

Claims (2)

A first member and a second member are connected to each other so as to be relatively openable and closable. The shaft has a flange at one end, and the shaft is inserted in the axial direction of a central portion, and the shaft is inserted into one end of the shaft. A case body rotatably provided and locked, a fixed cam having a cam portion at one end provided on one side inside the case body, the rotation being restrained by the shaft; and a free end of the shaft. A fixing member having a rotation preventing means attached to an outer periphery attached to the outside of the case on the side; and a shaft inserted through the shaft in the axial direction of the central portion and slidably provided in the axial direction while being restrained from rotating by the case body. A slider cam having a cam portion on a side opposed to the fixed cam, and a compression spring elastically mounted between the slider cam and the fixed member while being returned to the shaft. The cam body on the fixed cam side is composed of a left-right symmetrical convex part which protrudes relatively high toward the slider cam side, while the base body is constituted by a full throttle provided with detent means on the outside and inside thereof. A hinge device wherein the cam portion on the slider cam side has a convex portion having a gentle slope and a steep slope on one side. The case body has a side wall that is supported by the shaft, and a slide washer is interposed between a flange portion of the shaft and the fixed cam on both sides of the side wall. 3. The hinge device according to claim 1.

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