JPH0617570A - Hinge for tilt feature - Google Patents

Abstract

PURPOSE:To hold a display member stably at an angle of opening necessary for operation by a method wherein friction mechanisms are provided between an attachment member for supporting the display member and a rotative shaft for supporting, and intermittent driving is made thereby. CONSTITUTION:An attachment member 5 for supporting a display member is attached to the main body side of an apparatus, and attachment bases 5a and 5b, a bearing plate 5c and an earth-attaching plate 5d are provided to the attachment member 5. A rotative shaft 8 is borne by a bearing hole 6, and a part 8b in a large diameter is provided, adjoining a part 8a in a small diameter of the rotative shaft. An operating pin 9 is engaged with an engagement recess 17, depending on rotation angle of the rotative shaft 8, and intermittent driving is made thereby. Therefore, when the display member is closed, it can be opened upward only by operation of a first friction mechanism with the operating pin 9 disengaged from the engagement recess 17. As the display member is opened to a specified degree of opening, the operating pin 9 is engaged with the engagement recess 17, then operation of a second friction mechanism follows.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tilt hinge suitable for use when opening and closing a display body of an office automation equipment such as a notebook type personal computer.

[0002]

2. Description of the Related Art The applicant of the present application has a mounting member to be mounted on the main body of the apparatus, a rotary shaft having a bearing plate of the mounting member for bearing a small diameter portion to support the display body, and the rotary shaft and the bearing. Structure in which various washers are interposed between one side surface of the plate and between the other side surface of the bearing plate and the crimped end of the rotary shaft so that the rotary shaft rotates only when a predetermined rotational torque is applied. We proposed a tilt hinge that can obtain a simple and stable friction torque over the full opening angle of the display.

[0003]

In recent years, particularly in notebook type personal computers, the display body has become heavier than the main body of the apparatus. Therefore, in the conventional tilt hinge described above, since the friction acts over the entire rotation angle of the rotating shaft that rotates together with the display body, when the display body is opened, a lighter device main body is also lifted. Occurred.

In order to solve this point, it was naturally considered that the friction torque of the rotary shaft should be weakened.
Then, there is a new problem that the display body cannot be stably held at the opening angle of 100 ° to 135 ° which is the use angle of the display body.

As another solution, the rotating shaft, but only in the range of a constant opening angle of the display body,
Although it has been considered that the friction torque acts on the display body, such a configuration causes a problem that the display body suddenly drops from an opening angle at which the friction torque does not act.

An object of the present invention is to prevent the device body from being lifted up together when the display body is opened and to stably stop at the use angle of the display body, even if the display body is heavier than the device body. Another object of the present invention is to provide a tilt hinge that has a friction torque that can be retained and that can prevent the display body from dropping suddenly when it is closed.

[0007]

In order to achieve the above-mentioned object, the present invention is directed to a mounting member mounted on the apparatus main body side, and a rotary shaft rotatably supported by a bearing plate of the mounting member for supporting a display body. A first friction mechanism provided between the rotary shaft and the bearing plate; a second friction mechanism provided adjacent to the first friction mechanism; and a second friction mechanism provided at a predetermined position on the rotary shaft. In order to operate only in the range of the rotation angle, it is constituted by an intermittent drive force transmission means installed between the first friction mechanism and the first friction mechanism, and the intermittent drive force transmission means is provided with one of the rotary shaft and the rotary shaft. An operating pin projecting axially from the diameter portion and one of the rotating shaft and the rotating shaft for intermittently fitting the operating pin. Which is constituted by an engaging recess formed in the large diameter portion of the.

Further, the first friction mechanism has a thrust washer in which the rotary shaft is axially inserted between the large diameter portion provided on the rotary shaft and one side surface of the bearing plate, and the other side surface of the bearing plate. The rotary shaft may be composed of a friction washer, a spring washer, and a flat washer for pressing, which are also interposed between the rotary shaft and the crimped end.

Further, in the second friction mechanism, the thrust shaft is interposed between the large diameter portion provided on the rotary shaft rotatably supported by the bearing plate and one side surface of the bearing plate while axially inserting the rotary shaft. A washer, a friction washer, a spring washer, and a flat washer for pressing, which are interposed between the other side surface of the bearing plate and the caulked end of the rotary shaft while inserting the rotary shaft.

The thrust washer and the friction washer are made of phosphor bronze on one side or the other side of the thrust washer, and the friction washer can be further provided with a detent mechanism between the bearing washer and the bearing plate.

[0011]

When the display body is opened, the display body is opened up to a predetermined opening angle in a state where only the first friction mechanism operates, but when the predetermined opening angle is reached, the intermittent driving force transmitting means operates to rotate the rotary shaft. The second friction mechanism acts by engaging the operation pin projecting from the large diameter portion of the engaging groove with the engaging concave portion provided in the large diameter portion of the rotary shaft, and at a larger opening angle than that of the first friction mechanism. It is opened with double friction.

When the display body is closed, the driving force transmitting means closes the display body in a state in which the first friction mechanism and the second friction mechanism operate up to a predetermined closing angle. By disengaging the operating pin from the recess, the intermittent driving force transmitting means does not operate, and the first friction mechanism is closed with the friction acting.

At this time, if the friction torque of the first friction mechanism is made lighter than the weight of the main body of the apparatus, the main body of the apparatus will not be lifted with the opening operation of the display body, and the friction torque of the first friction mechanism The display body does not drop suddenly when it is closed.

When one or both of the thrust washer and the friction washer of the first and second friction mechanisms are made of phosphor bronze, the friction coefficient is so high that the friction torque may decrease due to wear even after long-term use. Absent.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The drawings show an embodiment of the present invention. A display body using a liquid crystal which is heavier than the main body 2 of the apparatus, for example, a main body 2 of a notebook personal computer provided with a keyboard 1 in FIG. 4 is attached via the protrusion 3 so as to be openable and closable. In the embodiment, the display body 4 is shown in an open state, but it is closed when not in use, and the locking piece 4 protruding from the display body 4 is shown.
a and 4a are engaged and locked with locking holes 2a and 2a provided on the apparatus main body 2 side.

The hinge for opening and closing the display body 4 is
It is installed in the portion of FIG. 1 viewed from A, and its structure is shown in FIG. 2 and subsequent figures.

According to the drawings, reference numeral 5 in FIGS. 2 to 4 denotes a mounting member, which is mounted on the apparatus main body 2 side. As shown in FIG. 2, the mounting member 5 is used as the mounting base 5.
a, 5b, bearing plate 5c, and ground mounting plate 5
bearing holes 6 and 7 are provided in the bearing plate 5c. A rotary shaft 8 which also serves as a supporting member bears the small diameter portion 8a in the bearing hole 6.
The rotating shaft 8 has a large diameter portion 8b following the small diameter portion 8a.
Is provided, and an operating pin 9 is provided on the outer periphery of the large diameter portion 8b so as to project in the axial direction. A mounting portion 8c is provided following the large diameter portion 8b, and the protruding portion 3 of the display body 4 is mounted via a bracket 10 fixed to the end portion of the mounting portion 8c. First, the first friction mechanism 15 will be described. Between the large diameter portion 8b and one side surface of the bearing plate 5c, a thrust washer 11 made of, for example, phosphor bronze inserts the small diameter portion 8a into its insertion hole 11a. Intervened. A friction washer 12 and a spring washer 13 made of, for example, phosphor bronze are provided on the other side surface of the bearing plate 5c by inserting the through holes 12a and 13a into the small diameter portion 8a of the rotary shaft 8.
From the outer periphery of the friction washer 12, the locking projection 12
The protrusion b is provided so as to engage with the locking hole 5e provided in the bearing plate 5c. A flat pressing washer 14 is further abutted on the spring washer 13 by inserting the small diameter portion 8a of the rotary shaft 8 into the insertion hole 14a. By caulking the end portion of the small diameter portion 8a, the thrust washer The friction washer 11 and the friction washer 12 are pressed against both sides of the bearing plate 5c of the mounting member 5. The outer diameter of the large diameter portion 8b and the outer diameter of the thrust washer 11 are substantially the same, and the outer diameter of the flat presser washer 14 and the outer diameters of the friction washer 12 and the spring washer 13 are substantially the same. 11 and the friction washer 12 are evenly pressed against the bearing plate 5c of the mounting member 5 over the entire surface.

Next, the second friction mechanism 22 will be described. A rotary shaft 16 is attached to the other bearing hole 7 formed in the bearing plate 5c by caulking one end of the small diameter portion 16a.
An engaging recess 17 that engages with the operating pin 9 intermittently is formed on the outer circumference of the large diameter portion 16b. A thrust washer 18 made of phosphor bronze, for example, is interposed between the large diameter portion 16b and one side surface of the bearing plate 5c while the small diameter portion 16a is axially inserted into the insertion hole 18a. Between the other side surface of the bearing plate 5c and the caulked end of the rotary shaft 16, a friction washer 19 made of phosphor bronze, a spring washer 20,
And insertion washer 21 in the order of presser washer 21
The small diameter portion is axially inserted into a, 20a, and 21a.

The operation pin 9 and the engagement recess 17 are intermittently engaged with each other depending on the rotation angle of the rotary shaft 8, and the two constitute the intermittent driving force transmission means 23.

Therefore, when the display body 4 is closed, as shown in FIG.
Since the operating pin 9 of No. 3 is not engaged with the engaging recess 17,
When the display body 4 is unlocked and opened upward, only the first friction mechanism acts on the rotating shaft that rotates together with the display body 4, and the display body 4 is opened. When opened to a predetermined opening angle (100 ° in the embodiment), the operating pin 9 engages with the engaging recess 17 and the second friction mechanism operates. In the embodiment, the second friction mechanism acts between 100 ° and 135 °.

Needless to say, the tilt hinge according to the present invention can be used as a hinge for opening and closing a lid or the like of a device other than an OA device.

[0022]

Since the present invention is constructed as described above,
The following effects can be achieved.

According to the first aspect of the present invention, the device body is lighter than the display body when the display body is opened by operating only the first friction mechanism up to a predetermined opening angle of the display body with a simple structure. In addition, it is possible to prevent the display body from dropping abruptly when the display body is closed, and in the range of the use opening angle of 100 ° to 135 ° of the display body, the first friction mechanism is provided. In addition, the second friction mechanism can be operated to stably hold the display body.

According to the second and third aspects of the invention, it is possible to generate a stable friction torque on the rotary shaft and the rotary shaft for a long period of time with a simple structure.

When phosphor bronze is used for the friction washer and the friction washer as in claim 4, there is an advantage that the caulking can be strengthened to increase the friction torque and the durability is improved.

[Brief description of drawings]

FIG. 1 is a perspective view of a laptop computer embodying the present invention.

FIG. 2 is an exploded perspective view of a tilt hinge according to the present invention.

FIG. 3 is a plan sectional view of a tilt hinge according to the present invention divided by a portion of a rotary shaft.

FIG. 4 is a plan sectional view of a tilt hinge according to the present invention divided by a portion of a rotation shaft.

FIG. 5 is a side view of the tilt hinge with the display body closed.

FIG. 6 is a side view of the tilt hinge when the display body is opened up to 100 °.

FIG. 7 is a side view of the tilt hinge with the display body opened to 135 °.

[Explanation of symbols]

 1 Keyboard 2 Device Main Body 3 Projection Part 4 Display Body 5 Mounting Member 5a Mounting Base 5c Bearing Plate 6, 7 Bearing Hole 8 Rotating Shaft 8a Small Diameter Axis 9 Operating Pin 10 Bracket 11 Thrust Washer 12 Friction Washer 13 Spring Washer 14 Flat Washer for Presser 15 First Friction Mechanism 16 Rotating Shaft 17 Engagement Recess 18 Thrust Washer 19 Friction Washer 20 Spring Washer 21 Flat Presser Washer 22 Second Friction Mechanism 23 Intermittent Driving Force Transmission Mechanism

Claims (4)

[Claims] 1. A mounting member mounted to the apparatus main body side, a rotary shaft pivotally supported by a bearing plate of the mounting member for supporting a display body, and a rotary shaft provided between the rotary shaft and the bearing plate. A first friction mechanism, a second friction mechanism provided adjacent to the first friction mechanism, and a first friction mechanism for operating the second friction mechanism only within a range of a predetermined rotation angle of the rotary shaft. An intermittent driving force transmitting means installed between the rotating shaft and the rotating shaft, and the operating pin projecting in the axial direction from the large diameter portion of one of the rotating shaft and the rotating shaft; It is characterized by comprising an engaging recess provided in a large diameter portion of one of the rotating shaft and the rotating shaft for intermittently fitting with the pin. Tilt hinge. 2. A thrust washer in which a first friction mechanism is interposed between a large diameter portion provided on a rotary shaft and one side surface of the bearing plate while axially inserting the rotary shaft, and another side surface of the bearing plate. The tilt hinge according to claim 1, characterized in that the tilt hinge comprises a friction washer, a spring washer, and a flat washer for pressing, which are also interposed between the swaging end of the rotating shaft and the swiveling end. 3. A thrust having a second friction mechanism interposed between a large diameter portion provided on a rotary shaft rotatably supported by a bearing plate and one side surface of the bearing plate while axially inserting the rotary shaft. A washer, and a friction washer, a spring washer, and a flat washer for holding, which are interposed while inserting the rotating shaft between the other side of the bearing plate and the caulked end of the rotating shaft,
The tilt hinge according to claim 1. 4. The thrust washer and the friction washer are made of phosphor bronze on one side or the other side of the thrust washer and the friction washer, and the friction washer is further provided with a detent mechanism between the bearing washer and the bearing plate. 4. The tilt hinge described in 4.