JPH0510814U - Friction hinge - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a friction hinge having a simple structure, having no play at the time of rotation operation, and having a good operation feeling at the time of rotation operation. A boss case 17 of a friction hinge 30 has an inner diameter portion formed into a large diameter hole portion 17a and a small diameter hole portion 17b, while the support shaft 15 rotates integrally with the display cover body 6.
Is a large diameter shaft portion 15a and a small diameter shaft portion 1 also having a collar 15c.
5b and stepped. A coil spring 18 is closely wound between the support shaft 15 and the boss case 17 so that both ends of a straight line having a parallel cross section and having the same length are connected by arcs. ..

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a friction hinge.

[0002]

[Prior Art]

 Conventionally, in an information device in which a display unit such as a liquid crystal display is rotatably attached to the device body, in general, the display unit serves as a cover for covering a keyboard and the like when the information device is not used, When doing so, it was necessary to hold the display unit at an arbitrary position. In addition, there is a demand to hold an appropriate load so that the cover does not drop suddenly when it is closed. To provide such a function, the device body and the display are usually arranged as shown in Fig. 5. It was connected by the friction hinge 50.

The friction hinge 50 is formed in a close contact coil shape with a support shaft 51, and has a coil spring 52 whose inner diameter is arranged in close contact with the support shaft 51, and one end of the coil spring 52 is fixed. And the mounting member 53. Then, by rotating a display unit (not shown) attached to the support shaft 51, the display unit is held at an arbitrary position by utilizing the contact pressure between the coil spring 52 and the support shaft 51. You can

[0004]

[Problems to be solved by the device]

 However, with this friction hinge, there is some play from when a force is applied to the display unit until the inner diameter of the coil spring changes and the display unit starts to rotate. There was an angle that could not be obtained, so the feeling of operation was poor.

The present invention has been made to solve the above-mentioned problems, and provides a friction hinge having a simple structure, having no play at the time of turning operation, and having a good operation feeling at the time of turning operation. To aim.

[0006]

[Means for Solving the Problems]

 In order to achieve this object, the friction hinge of the present invention includes a coil spring wound closely and having a substantially oval cross section, and a support shaft rotatably arranged inwardly inside the coil spring. And a case member that supports one end of the coil spring and the support shaft.

[0007]

[Action]

 In the friction hinge of the present invention having the above-mentioned configuration, between the major axis direction of the inner diameter portion of the coil spring having a substantially oval shape closely wound and the support shaft arranged inscribed in the inner diameter portion of the coil spring. The contact pressure is used to obtain the holding load between the coil spring and the spindle.

[0008]

【Example】

 An embodiment of a credit transaction processing device having a friction hinge according to the present invention will be described below with reference to the drawings.

FIG. 2 is a perspective view showing the external appearance of the device of the present invention, and FIG. 3 is a side view. Reference numeral 1 is a main body of the apparatus, which is covered with a case cover 1a made of plastic or the like. Reference numeral 2 is a card insertion portion for the credit card reading means 3, and reference numerals 4 and 5 are keyboards for inputting data. A display unit 7 and the keyboard 5 are provided on the lower surface of a display cover body 6 that is configured to be rotatable and lifted so as to cover the upper surface of a keyboard 4 that is provided near the front of the upper surface of the main body 1.

The display unit 7 includes a liquid crystal element (LCD) panel for displaying information such as input data, a fluorescent display panel, an EL panel (electroluminescence panel), and the like. The voucher 10 stored in the voucher storage section 8 consisting of a cassette box 9 which can be attached to and detached from the rear end of the main body 1 is sent by a pin tractor 11 to a printing device 12 as a voucher preparation section, and from a voucher exit 13 on the upper surface of the main body 1. put out.

In the main body 1, communication means capable of transmitting transaction data input from the keyboards 4 and 5 to an external central processing unit and receiving processing result data from the central processing unit (FIG. (Not shown), and also includes the communication unit and the control unit 14 as a control unit for controlling the printer 12 and the apparatus main body.

The base end of the display cover body 6 is rotatably supported by the support shafts 15 and 15 on the left and right sides of the front and rear midway of the upper surface of the main body 1, and covers the keyboard 4 when the credit transaction processing device is not used. Thus, the display cover body 6 is closed and fixed to the body 1 by the stopper lever 16. When using this device, the stopper lever 16 is removed to open the display cover body 6 at an arbitrary angle.

FIG. 1 shows a friction hinge 30 of the present invention for holding the posture of the display cover body 6 at an arbitrary opening angle, which is directed to the left and right sides in the middle of the upper surface of the case cover 1a of the main body 1. The inner diameter portion of the boss case 17 disposed inside the protruding portions 1b and 1c of the case cover 1a is formed into the large diameter hole portion 17a and the small diameter hole portion 17b, while rotating integrally with the display cover body 6. The support shaft 15 is formed in a stepped shape including a large-diameter shaft portion 15a and a small-diameter shaft portion 15b, which also have a collar 15c. The coil spring 18, which is inserted between the support shaft 15 and the boss case 17, is closely wound so that its cross section is parallel and both ends of a straight line are connected by arcs. While being pressed into the outer circumference of the large-diameter shaft portion 15a of the support shaft 15 so that approximately half of the inner diameter portion of the coil spring 18 comes into contact with the support portion 15a, the coil spring 18 is contacted with the linear spring portion. The circular arc portion of the outer diameter portion is prevented from coming into contact with the inner peripheral surface of the large diameter hole portion 17a of the boss case 17.

Further, the remaining approximately half of the outer diameter portion of the coil spring 18 is press-fitted (contacted with the contact pressure raised) so as to contact the inner peripheral surface of the small diameter hole portion 17b of the boss case 17. In addition, the linear portion of the inner diameter of the coil spring 18 is prevented from coming into contact with the outer peripheral surface of the small diameter shaft portion 15b of the support shaft 15, and the tip of the small diameter portion 15b is attached to the side end portion 6a of the display cover body 6. Reference numeral 19 is a retaining ring.

Next, the operation of the credit transaction processing device will be described. First, when a credit card (not shown) is inserted into the card insertion portion 2, the sensor reads it. The card feeding roller 20 and the pressing roller 21 feed the credit card to the left while the reading head 22 reads the contents stored in the credit card and communicates with the external central processing unit by the communication means. This will allow you to inquire about credit card accidents (whether a loss report has been submitted, etc.). The inquiry result can be immediately displayed on the display unit 7. Further, the contents of transaction by credit card and the like are inputted from the keyboard portions 4 and 5 while observing the display portion 7.

The slip 10 in the cassette box 9 is sent to the printing section by the pin tractor 11, the platen 23 and the paper pressing roller 24, and the processing result obtained from the contents input from the communication means and the keyboard sections 4 and 5 is obtained. Is printed by the printer 12. The printer 12 includes a print head 26 such as a dot print head mounted on a carriage 25 that moves linearly in parallel with the platen 23, and a ribbon cassette 27. Then, the voucher 10 on which the transaction processing result is printed and output is cut from the perforations at the voucher exit 13 and the voucher creating operation is completed.

In this case, by tilting the display cover body 6 toward the operator side (front side of the main body 1), the cutting operation of the slip 10 coming out of the slip exit 13 becomes easy.

By the way, while the credit transaction processing device is in use, as shown by the alternate long and short dash line in FIG. 3, the operator rotates the display cover body 6 so that the operator can easily see the display portion 7, and the display cover body 6 is properly adjusted. It is necessary to hold it at a proper inclination angle. Since the friction hinge 30 of the present embodiment is configured as described above, when the coil spring 18 is rotated in the same direction as its winding (for example, right-handed) direction, it is elastically deformed so that its winding diameter is reduced. On the other hand, when the coil spring 18 is rotated in the direction opposite to the winding direction, the coil spring 18 is elastically deformed so that the winding diameter increases. Therefore, when the display cover body 6 is rotated by hand with a predetermined torque or more, for example, in the direction in which the inner diameter of the coil spring 18 is tightened (the winding diameter is reduced) on the outer peripheral surface of the support shaft 15 of the large diameter shaft portion 15a. When rotated, the contact pressure on the inner peripheral surface of the small diameter hole portion 17b of the boss case 17 is reduced and the boss case 17 is easily rotated. Then, when the display cover body 6 is released at the turning position, the winding diameter of the coil panel 18 is restored to its original state, and the display cover body 6 stops at that position and holds the tilt angle. You can do it.

Further, as described above, the coil spring 18 is formed to have a shape in which both ends of a straight line having a parallel cross section and the same length are connected by an arc, so that the straight part of the inner diameter portion of the coil panel 18 is formed. Is in contact with the outer circumference of the large-diameter shaft portion 15a of the support shaft 15, there is no play when reversing the rotation direction of the coil spring 18, and the position of the display cover body 6 corresponds exactly to the rotation operation amount of the operator. .. Therefore, when reversing the direction of rotation of the coil spring 18, the uncomfortable feeling of operation as in the prior art is not felt.

Further, the holding load for holding the display cover body 6 can be changed by changing the diameter of the large-diameter shaft portion 15a of the support shaft 15 or the diameter of the small-diameter hole portion 17b of the boss case 17. Obviously, the direction can be set.

It should be noted that when the display cover body 6 is opened, the keyboards 4 and 5 can be operated, but if there are many types (numbers) of keyboards, it is difficult to understand the key operation. However, as in the embodiment, a keyboard 5 such as a function key is provided at a portion adjacent to the lower end of the display unit 7 of the display cover body 6, and the lower end of the display unit 7 corresponds to each of the keyboards 5. The key function is displayed to greatly improve the usability. Also, by moving a part of the large number of keyboards to the display cover body 6 side, the number of keyboards installed on the upper surface side of the main body 1 can be reduced, and the main body 1 can be made compact.

A switch 28 is provided on the lower surface when the display cover body 6 is closed or on the upper surface of the case cover 1a facing the display cover body 6, and when the display cover body 6 is closed, the switch 28 is pressed to display the display. If the LCD main body of the section 7 or the LCD backlight is energized or linked so as to turn off the power, it is possible to prevent forgetting to turn off the power or shortening the life due to forgetting to turn off the display section 7. Further, when the display cover body 6 is opened, the power is automatically turned on, or the display unit 7 can be operated, which has an advantage that the time until the start of the operation can be shortened.

Further, as shown in FIG. 2, if a lock lever 29 is provided at an inconspicuous portion such as a side surface of the case cover 1a of the main body 1 and the display cover body 6 in the closed state is locked, the operator can Others will not be able to open it carelessly, which will improve the safety of handling the device.

Further, instead of the friction hinge 30 of the present embodiment, as shown in FIG. 4, it is formed in a shape in which both ends of a straight line having a close cross section and having the same length are connected by arcs. The support shaft 41 is arranged so as to be in contact with the linear portion of the inner diameter of the coil spring 42, and the one end of the coil spring 42 and the support shaft 41 are attached to the case 43 formed integrally with the case cover 1a of the main body 1. Even if the friction hinge 40 configured by connecting is used, the operation feeling is not bad as in the conventional case for the same reason as described above.

[0025]

[Effect of the device]

 As is clear from the above description, according to the friction hinge of the present invention, the structure is simple, the operation feeling at the time of turning operation is good, and further, it can be held at a desired position.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a friction hinge embodying the present invention.

FIG. 2 is a perspective view of a credit transaction processing apparatus having a friction hinge according to the present invention.

FIG. 3 is a schematic side sectional view of a credit transaction processing device.

FIG. 4 is a perspective view of a friction hinge embodying the present invention in another form.

FIG. 5 is a perspective view of a conventional friction hinge.

[Explanation of symbols]

 15 Spindle 17 Boss Case 18 Coil Spring 30 Friction Hinge

Claims (1)

[Claims for utility model registration] [Claim 1] A coil spring closely wound and formed in a substantially oval cross section, and a rotatably arranged spindle inscribed inside the coil spring, A friction hinge, comprising: a case member supporting one end of the coil spring and the support shaft.