JPS5840206B2 - Key panel replacement method for computing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a connection mechanism between a key panel in a calculator or the like in which a calculation mode is designated and a calculation device or the like.

<Prior art> Conventional key panel replacement methods are as shown in Figure 1a,
As shown in b and c, the locking claw 2 protrudingly formed on one edge of the key panel 1 is inserted into the locking hole 5 provided in the cabinet 4 of the calculator 3, and the keys arranged on the key panel 1 are inserted. Insert the operation key 7 of the calculator 3 into the insertion hole 6, and then slide the slide block 8 provided at a position facing the locking hole 5 of the cabinet 4 as shown in FIG. The key panel 1 was fixed to the operating surface of the calculator 3 by fitting the fixing hole 10 of the slide block 8 into a cutout piece 9 formed protruding from the other edge of the panel 1.

In addition, the calculation mode can be changed by operating the mode changeover switch 11 provided on the cabinet 4 and using the key panel 1.
It matched the calculation mode specified in .

In the conventional key panel replacement method described above, replacing the key panel 1 and selecting the calculation mode are independent operations, so the calculation mode specified on the key panel 1 and the calculation mode selected by the mode changeover switch 11 must not match. There was a risk of miscalculation.

Further, the number of key panels 1 is equal to the number of calculation modes, and a calculator or the like that performs high-order program calculations requires several or more key panels 1.

<Object of the Invention> In view of the above-mentioned current situation, the present invention provides an engaging part that can engage with the mode changeover switch on the key panel, so that the calculation mode specified on the key panel when the key panel is installed can be changed to the mode changeover switch. By using both the front and back sides of the key panel to specify the calculation mode, the number of required key panels can be halved.
Furthermore, it is an object of the present invention to provide a new and useful key panel exchange method in which the engaging portions are arranged symmetrically when the key panel is attached to the front side and the back side, and the mode changeover switch can be set to the corresponding calculation mode. purpose.

<Example> An example of the present invention will be described in detail below with reference to the drawings.

FIG. 2a is a perspective view of a calculator and a key panel according to an embodiment of the present invention.

FIG. 2 is a perspective view of a main part when a key panel is attached to the calculator.

A key panel 12 with a designated calculation mode is made of a magnetized material, is attached to the cabinet 14 by a magnet 15 installed on the top surface of the cabinet 14 of a calculator 13, and is magnetically attracted and fixed.

A locking pawl 16 is formed protruding from one edge of the key panel 12 and is inserted into a locking hole 17 provided in the cabinet 14 .

An engaging recess 19 is cut out in the edge of the key panel 12 where the locking pawl 16 is formed, and is engaged with a sliding mode changeover switch 18 installed near the locking hole 17 of the cabinet 14.

In the key panel 12, the mode changeover switch 18 is inserted into the engagement recess 19, and the mode changeover switch 18 is slid to a position where the locking pawl 16 can fit into the locking hole 17, and the locking pawl 16 is engaged. The key panel 12 is fitted into the stop hole 17.
The operation keys 21 of the calculator 13 are fitly inserted into the key insertion holes 20 arranged on the top surface and fixed to the operation part of the cabinet 14 via the magnet 15.

A removable water 22 is formed protruding from the edge of the key panel 12 opposite to the edge where the locking pawl 16 is formed, and the removable water 22 is connected to a second
As shown in the figure, when the key panel 12 is installed, the cabinet 1
4 Protrude the tip outward from the main body.

The key panel 12 can be removed from the cabinet 14 by operating the detachable water 22.

The calculation mode designation and mode switching method of the key panel 12 according to the present invention will be explained in detail below with reference to FIGS. 3 and 4.

Figure 3 shows A and B. Four key panels 12 are shown in which four types of calculation modes, C and D, are designated.

Each key panel 12 is provided with a locking pawl 16, an engaging recess 19, and a detachable water 22 shown in FIG.

FIG. 4 shows a further improvement of the key panel 12 shown in FIG. 3. By specifying the calculation mode on both the front and back sides of the two key panels 12, four types of calculation modes, A, B, C, and D, can be specified. It is something that

That is, when the key panel 12 with calculation mode A designated is turned over, calculation mode D is designated on the back side, which is similar to the key panel 12 designated with calculation mode D shown in FIG.
corresponds to

The same applies to the key panel 12 in which calculation mode B in FIG. 4 is designated.

Since the two locking claws 16 are provided in symmetrical positions, the engaging recesses 19 can be attached to the key panel 12 when the front side is used and when the back side is used.
The mode switching switch 18 is arranged in a line-symmetrical position with the center of the axis of symmetry as an axis of symmetry, and the mode switching of the mode switching switch 18 is operated and controlled by this symmetrical arrangement conversion.

5A, 5B, 5C, and 5D are a configuration diagram and a side sectional view illustrating one embodiment of the storage form of the key panel 12 according to the present invention.

When storing the key panel 12 that is not in use, an embodiment may be considered in which a separate case is newly provided or a storage mechanism is provided on the back side of the cabinet 14 or inside the cabinet 14.

However, if the key panel 12 is placed in a separate case, there is a risk of losing the key panel 12, and if a storage mechanism is provided on the back side or inside the cabinet 14, the thickness of the calculator body will increase, and the operation of the battery storage lid on the back side will be hindered.

Therefore, the unused key panel 12 is placed on the operating surface of the cabinet 14 as shown in FIGS.
It is stored in a stacked manner at the bottom of 2.

The operating surface of the cabinet 14 is constructed as shown in FIG. 5C, and those of the key panels 12 that are not used are stored with the upper and lower edges reversed as shown in FIG. 5C.

At this time, key panel 1 is placed on the mode selector switch 18 side.
The attachable/detached water 22-type command edge of 2 is opposite, but the key panel 12
When the operation key 21 is inserted into the key entry hole 20, the edge of the key panel 12 forming the detachable water 22 does not come into contact with the mode changeover switch 18, and the degree of freedom of the mode changeover switch 18 is maintained.

The key panel 12 to be used is mounted on this key panel 12 by the operation described above.

FIG. 5d is an explanatory diagram showing the storage positional relationship of the used key panel 12 (on the left side in the figure) and the unused key panel 12 (on the right side in the figure) when the calculator main body is stored.

The dashed-dotted line in the figure indicates a reference line for comparison.

Although the above embodiment has been described with two key panels, the present invention is not limited to this, and even with one key panel,
Further, it is also possible to carry out the same procedure for three or more sheets.

In addition to the slide type switch, the mode changeover switch can also use multiple button keys corresponding to the placement positions of the engagement recesses, and the same key as the operation key can be used to unify the group of keys on the operation surface. is also possible.

The engagement recess of the key panel may be formed on one side edge of the key panel, and FIG. 6 shows an embodiment of this.

FIG. 6 shows a locking claw 16 on one side edge of the key panel 12.
An engagement recess 19 is formed, and one key panel 12 indicates a storage position when in use and the other key panel 12 indicates a storage position when not in use.

Effects> As explained in detail above, the present invention mechanically connects the calculation mode selection of the mode changeover switch to the specified calculation mode of the key panel, and furthermore, uses this connection mechanism to reduce the number of regular key panels by half. This feature effectively prevents erroneous calculations due to mismatch between the calculation mode specified on the key panel and the calculation mode selected on the mode selection switch. Since the specified calculation mode is reliably selected, a wide variety of calculation modes can be reliably executed using a small number of permanent key panels.

Furthermore, the key panel replacement method of the present invention has a simple configuration;
It is compatible with conventional equipment and has various excellent effects such as reducing the number of parts and improving the functionality of arithmetic devices.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1a, 1b and 1c are block diagrams showing a conventional key spring replacement method. FIG. 1a is an exploded perspective view of the calculator body and key panel. FIG. 1 is a side sectional view showing the structure of the calculator cabinet. FIG. 1C is a side sectional view showing the state in which the key panel is attached to the cabinet. FIG. 2a is a perspective view of a calculator main body and a key panel showing one embodiment of the present invention. FIG. 2 is a perspective view of a main part when a key panel is attached to the calculator. FIGS. 3 and 4 are detailed views of the key panel for explaining calculation mode designation and mode switching method of the key panel according to the present invention, and FIG. 3 shows four key panels with four types of mode designations. FIG. 4 shows one embodiment of the present invention,
A front view and a back view of two key panels in which four types of modes are specified are shown. FIGS. 5a, b, c, and d show an embodiment of a mechanism for storing a key panel according to the present invention. FIG. 5a is a perspective view of the calculator body and a plurality of key panels. FIG. 5 is a side sectional view showing the structure of the calculator cabinet. FIG. 5C is a side sectional view when a plurality of key panels are housed in the electric body. FIG. 5d is an explanatory diagram showing the storage positional relationship between the used key panel and the unused key panel when the main body of the calculator is stored. FIG. 6 is a plan view showing an embodiment in which a connecting mechanism is formed on the side edge of the key panel. 12...Key panel, 13...Calculator,
14... Cabinet, 16... Locking claw, 17... Locking hole, 18... Mode changeover switch, 19... Attachment Matching recess.

Claims (1)

[Claims] 1 A key panel with calculation modes specified on both the front and back sides,
In the coupling mechanism with the arithmetic device having a mode changeover switch for selecting the arithmetic mode, the key panel is provided with an engaging portion that engages with the mode changeover switch, and the engaging portion is configured to be connected to the arithmetic device when the arithmetic device is attached. a first calculation mode selection mechanism that sets the mode changeover switch to a specified calculation mode; and a first calculation mode selection mechanism that is arranged at positions symmetrical to each other when the front and back surfaces of the key panel are attached, and that changes the selected calculation mode of the mode changeover switch. 2 calculation mode selection mechanisms, and both the first calculation mode selection mechanism and the second calculation mode selection mechanism have the mode changeover switch in a selection position corresponding to the calculation mode specified on the key panel. A key panel replacement method for an arithmetic unit, characterized in that the key panel can be set.