JPH081404U - Tilt hinge for OA equipment - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To provide a tilt hinge for OA equipment capable of holding a relatively heavy display body at a use opening angle only by frictional force. [Structure] A mounting member 5 composed of a mounting base 5a and a bearing plate 5b mounted on the main body of the apparatus, and a rotary shaft 7 serving also as a supporting member for a display body bearing a small diameter portion 7b provided at one end of the bearing plate. A slider washer 8 interposed between the large diameter portion 7d of the rotary shaft and one side surface of the bearing plate, a friction washer 9, a spring washer 10 and a press washer 11 interposed on the other side surface of the bearing plate. Consists of. By caulking the end of the small diameter part, the rotating shaft is configured to rotate together with the spring washer only when a predetermined rotating torque is applied, and a frictional force is generated between the friction washer and the spring washer. To configure.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a tilt hinge for OA equipment, which is particularly suitable for opening and closing a display body of an OA equipment such as a laptop or tabletop word processor or a personal computer.

[0002]

[Prior art]

 Conventionally, this type of tilt hinge requires the display body to be stably stopped and held at an arbitrary position at the use opening angle (90 ° to 135 °) with respect to the device body, and as a configuration for this, it is attached to the device body. The mounting base and the bearing plate are bent at right angles to each other, and a bearing hole is formed in the bearing plate of the mounting member configured to have an angled cross section.The rotary shaft having the flange is inserted into this bearing hole to sandwich the bearing plate. With the slider washer and spring washer on the left and right, insert the rotary shaft into the center of the rotary shaft, and crimp the ends of the rotary shaft to generate frictional force on both sides of the bearing plate. Use the display unit fixed to this rotating shaft so that it rotates only by It is known that the device can be stopped and held at an arbitrary position.

[0003]

[Problems to be solved by the device]

 This conventional tilt hinge for OA equipment requires a strong caulking torque in order to hold the display body at its intermediate opening angle only by the frictional force. Therefore, when it is used for a long time, the friction part, especially the metal spring washer and the bearing are used. There was a drawback that abrasion occurred with the plate, the initial rotational torque decreased, and the stop holding ability of the display body at the opening angle used decreased.

An object of the present invention is to provide a tilt hinge for OA equipment, which is particularly devised so as to prevent abrasion of a friction portion and prevent the stop-holding ability of the display body at a use opening angle even after long-term use. There is.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides a mounting member which is mounted on the main body of the apparatus and is composed of a bearing plate, and a display body in which the bearing plate of this mounting member has a small diameter portion at one end. A rotating shaft that also serves as a supporting member, a slider washer having a small diameter portion inserted in the center between the large diameter portion of the rotating shaft and one side surface of the bearing plate, and the other bearing plate It consists of a friction washer, a spring washer, and a press washer that are inserted on the side surface while inserting the small diameter part of the rotary shaft through its center part.The friction washer is fixed to the bearing plate, and the slider washer and the bearing plate are Between the friction washer and the spring washer While lubricating oil is applied to the shaft, the end of the small diameter portion is caulked so that the rotary shaft rotates together with the spring washer only when a predetermined rotational torque is applied. It is configured so that a frictional force is generated between the washer and the spring washer.

In this case, according to the present invention, the slider washer can be made of a synthetic resin sheet such as nylon or phosphor bronze.

This invention can further comprise the friction washer made of phosphor bronze.

[0008]

[Action]

 When the mounting base of the mounting member is fixed to the main body of the device, the mounting part of the rotary shaft is fixed to the display body, and the display body is opened and closed, the rotary shaft interposes the bearing plate and the slider washer or friction washer is interposed. Since it is swaged and does not rotate unless there is a predetermined rotation torque, the display body can be freely stopped at any position of the opening angle used, and the friction part of the slider washer or friction washer can be stopped. The applied lubricating oil prevents friction, and the frictional force does not decrease even after long-term use.

At that time, if the slider washer and the friction washer are made of phosphor bronze, since they have excellent wear resistance, even if they are caulked with a stronger caulking torque, the rotational torque will decrease due to abrasion after long-term use. This can be prevented even further.

[0010]

【Example】

 FIG. 1 shows an embodiment of the present invention, in which a display body 4 using a liquid crystal is attached to a main body 2 of a word processor having a keyboard 1 in FIG. There is. In the embodiment, the display body 4 is shown in an open state, but it is closed when not in use, and the locking pieces 4a, 4a protruding from the display body 4 are provided on the apparatus main body 2 side. It is locked by engaging with the stop holes 2a, 2a.

The tilt hinge that opens and closes the display body 4 is installed in the portion viewed from A in FIG. 1, and the structure thereof is shown in FIG. 2 and subsequent figures.

According to the drawings, 5 is a stainless steel mounting member, which is mounted on the apparatus main body 2 side. The mounting member 5 is formed by bending a mounting base 5a and a bearing plate 5b so as to have a substantially L shape on the front surface, and a bearing hole 6 is provided in the bearing plate 5b. A rotating shaft 7 made of stainless steel, which also serves as a supporting member, bears the small diameter portion 7c in the bearing hole 6. The rotating shaft 7 has a large diameter portion 7d following the small diameter portion 7c, and the mounting portion 7a formed by cutting off both sides of one side of the large diameter portion 7d has mounting holes 7e, 7e provided therein. A part of the display body 4 is fixed by screws 7b and 7b through the shaft 7, and the rotary shaft 7 rotates together with the display body 4 by being supported at a bearing portion of the mounting member 5 with respect to the bearing plate 5b.

Between the large diameter portion 7d of the rotary shaft 7 and one side surface of the bearing plate 5b, a slider washer 8 made of, for example, phosphor bronze has a small diameter portion 7c inserted through an insertion hole 8a formed at the center thereof. The friction washer 9 and the spring washer 10 made of phosphor bronze are provided on the other side surface of the bearing plate 5b by inserting the small diameter portion 7c of the rotary shaft 7 into the through holes 9a, 10a. ing. The slider washer 8 may be a synthetic resin sheet such as nylon. The spring washer 10 is further provided with a pressing washer 11 which is brought into contact with the small diameter portion 7c of the rotary shaft 7 through the insertion hole 11a. By caulking the end of the small diameter portion 7c, the slider washer 8 and the friction washer 9 are pressed against both sides of the bearing plate 5b of the mounting member 5.

The friction washer 9 has a locking piece 9b that engages with a locking hole 5d provided in the bearing plate 5b, and by being fixed to the bearing plate 5b of the mounting member 5, the rotary shaft 7 is fixed. It does not rotate with it. However, the spring washer 10 and the pressing washer 11 rotate together with the rotary shaft 7, and a frictional force is mainly generated between the friction washer 9 and the spring washer 10. Since the outer diameter of the large diameter portion 7d and the outer diameter of the slider washer 8 are substantially the same, and the outer diameter of the metal pressing washer 11 and the outer diameter of the spring washer 10 are substantially the same, the slider washer 8 The friction washer 9 and the friction washer 9 are evenly pressed against the bearing plate 5b of the mounting member 5 over the entire surface. Between the slider washer 8 and the bearing plate 5b, and between the friction washer 9 and the spring washer 10, lubricating oils 12 and 13 made of, for example, molymate or molybdenum-based grease are applied.

The spring washer 10 is formed by radially and alternately arranging three irregularities 10b and 10c at equal intervals, and the surfaces of the irregularities 10b and 10c are flat. As a result, the spring washer 10 is pressed toward the bearing plate 5b by the holding washer 11 having the substantially same outer diameter as that of the spring washer 10, and a large stable frictional force with the bearing plate 5b is obtained. It is a factor. The shape of the spring washer is not limited to that of the embodiment, and may be a corrugated shape, a dish shape, or the like.

The large diameter portion 7d of the rotary shaft 7 is provided with a stopper pin 7g so as to project, and the bearing plate 5b is provided with a projecting piece 5c which abuts against the stopper pin 7g.

The crimping torque for crimping the end of the small diameter portion 7b of the rotary shaft 7 can be arbitrarily selected depending on the weight of the display body.

It goes without saying that the display body may be for various kinds of OA equipment such as a personal computer in addition to the one for the word processor as in the embodiment.

FIG. 6 and FIG. 7 are graphs showing the results of the durability test of the tilt hinge configured as described above. In both cases, the rotational torque of the designed rotating shaft was set to 39 kg · mm, and after assembly 48 The test was conducted after opening and closing after a lapse of time to see if it can withstand the required 20,000 opening and closing operations.

As can be seen from the drawing, after 48 hours, the initial torque becomes 42 kg · mm, which is larger than the set value, but after that, it drops slightly, then rises again from 5,000 times to 44 kg after 10,000 times.・ After reaching mm, it gradually descends again and returns to the set value of 39 kg · mm at 20,000 times. Also, the dynamic torque has almost no change up to 10,000 times, and gradually drops from this, and the one in Fig. 6 rises again from 15,000 times and returns to the set value of 39 kg · mm at 20,000 times. Understand. It can be seen that the one in FIG. 7 drops slightly from 15,000 times to 35 kg · mm at 20,000 times, which is slightly lower than the set value. However, the drop of the dynamic torque to this extent is within the range of 20% with respect to the set value, and is within the range that does not cause a problem in holding the display body at the use opening angle. Generally, a tolerance of 20% is acceptable.

[0021]

[Effect of device]

 Since the present invention is configured as described above, the following effects can be obtained.

According to the first aspect of the present invention, the friction torque of the rotating shaft is largely changed even when the opening and closing operation is performed 20,000 times assuming a display body that is small and does not occupy a large installation space. Since it does not occur, the display body can be stably stopped and held at an arbitrary opening angle for use, and this stable stop and hold ability does not change for many years.

At this time, when the construction of claims 3 to 4 is adopted, the small diameter portion can be caulked more strongly, and it is well used with the spring washer and is used for opening and closing a heavier display body. However, after long-term use, the ability of the display body to stop and hold at the intermediate opening angle of the display does not diminish due to wear.

[Brief description of drawings]

FIG. 1 is a perspective view of, for example, a word processor embodying the present invention.

FIG. 2 is a front sectional view taken along line A in FIG. 1, showing a tilt hinge according to the present invention.

FIG. 3 is an exploded perspective view of the tilt hinge according to the present invention.

FIG. 4 is a right side view of FIG. 2;

FIG. 5 is a right side view showing a state in which the rotary shaft is rotated in the state of FIG.

FIG. 6 is a graph showing a result of a durability test of the tilt hinge according to the present invention.

FIG. 7 is a graph showing the results of a durability test of the tilt hinge according to the present invention.

[Explanation of symbols]

 2 Device body 4 Display body 5 Mounting member 5a Mounting base 5b Bearing plate 5c Projecting piece 5d Locking hole 6 Bearing hole 7 Rotating shaft 7a Mounting portion 7b Screw 7c Small diameter portion 7d Large diameter portion 7e Mounting hole 7f Female screw portion 8 Slider washer 9 Friction washer 9b Locking piece 10 Spring washer 11 Presser washer

Claims (4)

[Scope of utility model registration request] 1. A mounting member comprising a mounting base and a bearing plate, which is mounted on the main body of the apparatus, and a rotary shaft which also functions as a supporting member for a display body which has a bearing plate of the mounting member bearing a small diameter portion at one end thereof. , A slider washer in which a small diameter portion is inserted in the center portion between the large diameter portion of the rotating shaft and one side surface of the bearing plate, and a small diameter portion of the rotating shaft on the other side surface of the bearing plate. The friction washer, spring washer,
And a pressing washer, the friction washer is fixed to a bearing plate, and lubricating oil is applied between the slider washer and the bearing plate and between the friction washer and the spring washer, while the end of the small diameter portion is applied. The rotary shaft is configured to rotate together with the spring washer only when a predetermined rotational torque is applied by caulking, and a frictional force is mainly generated between the friction washer and the spring washer. A tilt hinge for OA equipment, which is characterized in that 2. The tilt hinge for OA equipment according to claim 1, wherein the slider washer is made of a synthetic resin sheet such as nylon. 3. The tilt hinge for OA equipment according to claim 1, wherein the slider washer is made of phosphor bronze. 4. The tilt hinge for OA equipment according to claim 1, wherein the friction washer is made of phosphor bronze.