JP3223944B2 - Digitizer structure of portable information terminal - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a PDA (Pers) equipped with a digitizer (for example, a resistive transparent digitizer).
The present invention relates to a portable information terminal such as an online digital assistant, and more particularly to a structure of a digitizer.

[0002]

2. Description of the Related Art A conventional information terminal device is provided with a special cover for protecting an upper film of a digitizer.

[0003] As shown in FIG. 14 (a), a resistive transparent tablet as a digitizer is composed of an upper film 1.
Wiring pattern 2 of base glass 24
4a is transferred with a conductive paste 5 or the like, and a flexible printed wiring board 6 is connected thereto, and a connector (not shown)
14 or, as shown in FIG. 14 (b), a product in which the upper film 8 and the lower film 9 are bonded to each other on the upper surface of the base glass 24, and a part of each film is stretched to connect the connector ( (Not shown).

[0004]

However, the above-mentioned conventional structure requires a special cover, and has the drawback that the entire thickness is increased and the weight is increased.

[0005] Further, the step of transferring the wiring pattern 2 of the upper film 1 to the lower side and the flexible printed wiring board 6
And it was difficult to insert the connector in a narrow place, and the tablet could not be easily replaced.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to enable a digitizer to slide along guide grooves on both sides of a display unit of an information terminal so that it can be inverted. Accordingly, the present invention provides a novel digitizer structure for a portable information terminal in which the base glass is placed on the upper surface to protect the digitizer.

[0007]

In order to solve the above-mentioned problems, the present invention provides a display unit provided in a portable information terminal, wherein guide grooves are provided along both sides of the display unit. Provided on the side of the digitizer placed on is a convex portion that is slidable in the guide groove,
The digitizer is reversibly assembled.

[0008] In addition, a guide portion is provided along both sides of a display portion provided in the portable information terminal, and a digitizer placed on the display portion is inserted along the guide groove. And the digitizer is configured to be reversible.

The portable information terminal is characterized in that terminals are formed by metal balls urged by springs, and terminals for contacting the metal balls are provided on the digitizer side. Things.

The terminal on the digitizer side is supported by sandwiching the base glass of the digitizer, and the wiring pattern of the digitizer is sandwiched between the terminal and the base glass so as to be electrically connected. It is characterized by having done.

[0011] Further, a fixing means for fixing the digitizer by engaging the side of the digitizer with the side of the display unit is provided.

[0012]

According to the present invention, the convex portion formed on the side of the digitizer is slid back and forth along the guide groove provided on the information terminal device and turned 180 degrees so that the base glass of the digitizer becomes the upper surface. To protect the display and digitizer.

Further, since the digitizer placed on the display unit is inserted along the guide groove and can be inserted into the guide groove by inverting the digitizer, the display unit and the digitizer are protected. Becomes possible.

Further, since the terminal on the digitizer side is in contact with a metal ball urged by a spring, which is a terminal of the information terminal, the digitizer can be easily inverted or replaced.

Further, since the wiring pattern of the digitizer is sandwiched between the clip-shaped terminal and the base glass and is electrically connected, the wiring pattern of the upper film is transferred to the lower side as in the conventional case. This eliminates the need for extra steps, and also eliminates the need for a flexible printed wiring board, thereby reducing component costs.

Also, since the digitizer is fixed to the main body by engaging the side of the digitizer with the side of the display unit, the digitizer can be securely fixed to the information terminal even during use or inversion. It is possible to prevent unexpected accidents.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. In the figure, reference numeral 10 denotes a main body of the portable information terminal, which has a display unit 11 at substantially the center, and guide grooves 12a, 12a provided on both sides thereof as shown in FIGS. Left and right convex portions 21a, 21 at the base end of the frame 21 of the digitizer 20 placed on the display unit 11.
a are slidably inserted into the guide grooves 12a. A first terminal 13 connected to a printed circuit board 13b (FIGS. 3 and 7) is provided in the main body 10 on a side perpendicular to the guide grooves 12a. The first terminal 13 includes a conductive spring 13a connected to a circuit on a printed circuit board 13b and a metal ball 13c urged by the spring 13a. FIG. 2 is a diagram showing a state in which the projection 21a of the digitizer 20 is moved along the guide groove 12a and the digitizer 20 is moved from the state of FIG. 1, and FIG. 3A is for explaining the state of FIG. FIG. 3B is a cross-sectional view before the state of FIG. 2 is reached. In this way, the digitizer 20 can be turned 180 degrees.

Reference numeral 22 denotes a second terminal which is a clip-shaped terminal made of a metal having a spring property, and is disposed at the tip of the frame 21 of the digitizer 20 and can be configured as follows. . That is, as shown in FIGS. 6 and 7, the lower piece 22g of the second terminal 22 is pressed against the lower surface of the base glass 24 of the digitizer 20 made of a resistive transparent tablet, and the upper piece 22a of the terminal 22 has a tip. The upper surface of the upper film 25 of the digitizer 20 is pressed and the upper piece 22 is pressed.
The branch pieces 22e cut and raised from a are pressed against the wiring patterns 24a on the base glass 24, respectively. Therefore,
Wiring pattern 2 of upper film 25 on wiring pattern 24a
5a is pressed and the wiring pattern 24a is
Since the terminal 22 is electrically connected to the terminal 22 via the terminal e, the terminal 22 becomes a terminal of the digitizer 20. Also, as shown in FIG. 8, when there are an upper film 25 and a lower film 26, the second terminal 22 has the same configuration, and the branch piece 22e is
To be pressed against the wiring pattern 26a.

As shown in FIGS. 9 and 10, the second terminal 22 has a lower piece 22g and an upper piece 22b pressed against the lower surface of the base glass 24 of the digitizer 20. The base piece 22d is inserted between the wiring pattern 25a on the lower surface of the upper film 25 and the upper surface of the base glass 24, and the branch piece 22f and the base piece 22 cut and raised from the base piece 22d.
This is a structure in which the upper film 25 is interposed between the upper film 25 and the upper film d.

Further, as shown in FIG.
The lower piece 22g has a structure in which the lower piece 22g is pressed against the lower surface of the base glass 24, and the upper piece 22a is formed by extending the end of the upper film 25 and pressing the upper surface of the wiring pattern 25a on the back surface which is turned up 180 degrees. Also in this case, the terminal 22 and the wiring pattern 25a have a structure that ensures conduction.

FIG. 4 and FIG.
2 shows a structure for fixing to a position. Frame 2 of digitizer 20
At the front end of the main body 1, a cylindrical locking piece 21 c urged by a leaf spring 21 b projects.
The digitizer 20 is fixed to the main body 10 so as not to move at the time of non-reversal and reversal by this structure. You. The leaf spring 21b
The left and right ends of the leaf spring 21 are shaped to fit into the holes 21f of the frame 21.
b can be attached to the recess 21g of the frame 21. FIG. 4 is a perspective view of a main part, FIG. 5A shows a non-inverted state where the digitizer 20 can be used, and FIG. 5B shows an inverted state.

FIGS. 12 and 13 show another embodiment of the present invention. The digitizer 20 of this embodiment includes a main body 1
It can be turned 180 degrees laterally from 0. That is, as shown in FIG. 12, guide grooves 12b, 1 each having one open side on both sides of the display unit 11 of the main body 10.
2b, a connector socket 15 is disposed on a side perpendicular to the guide grooves 12b, 12b, and a dummy socket 16 is disposed at a position corresponding to the connector socket 15 on this side. Rails 21d are provided on both sides of the frame 21 of the digitizer 20 so as to be slidably fitted to the guide grooves 12b, 12b, and the leading end of the frame 21 is fitted to the connector socket 15 as shown in FIG. A clip-shaped terminal 23 is provided.
A protruding terminal 23 a is integrally formed at the tip of the terminal 3, and the terminal 23 a is configured to be connected to the connector socket 15.

[0023]

As described above, according to the present invention, the following effects can be obtained. (1) The display section provided in the portable information terminal is provided with guide grooves along both sides thereof, and the side of the digitizer placed on the display section slides in the guide grooves. Since the protruding portion that enables movement is provided and the digitizer is assembled to be reversible, when the digitizer is reversed, the base glass becomes the surface, so that the upper film is not scratched or stained when carrying, etc. No cover is required. Thus, the weight of the main body can be reduced and the thickness can be reduced.

(2) A guide groove is provided along both sides of a display unit provided in the portable information terminal, and a digitizer mounted on the display unit is arranged along the guide groove. Since the digitizer is inserted and the digitizer is configured to be reversible, the display unit and the digitizer can be protected with a simple structure by reversing the digitizer when carrying the portable device, similarly to (1). Further, the exchange of the digitizer is facilitated, and the serviceability is improved.

(3) Further, the portable information terminal is formed with a metal ball urged by a spring to form a terminal, and the digitizer side is provided with a terminal for making contact with the metal ball, so that the terminal is narrow. There is no need to insert a flexible printed circuit board or the like into the connector at a location, and the digitizer can be easily replaced.

(4) The terminal on the digitizer side is supported with the base glass of the digitizer interposed therebetween.
Since the wiring pattern of the digitizer is sandwiched between the terminal and the base glass so as to be electrically connected, an extra step for transferring the wiring pattern of the upper film to the lower side as in the related art is required. And a flexible printed wiring board is not required,
Further, in the case of the upper and lower film types, the number of tablets to be taken is greatly increased, so that the cost of parts can be reduced.

(5) Since the fixing means for fixing the digitizer by engaging the side of the digitizer with the side of the display unit is provided, the digitizer can be securely fixed to the main body at the time of inversion and non-inversion. It has excellent effects such as helping to prevent accidents.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention and is a perspective view of a state where a digitizer is set up.

FIG. 2 is a perspective view showing an embodiment of the present invention, in a state where the digitizer is moved along a guide groove to be turned upside down.

3A and 3B are longitudinal sectional views showing one embodiment of the present invention, in which FIG. 3A is a sectional view for explaining the state of FIG. 1 and FIG. 3B is a sectional view up to the state of FIG.

FIG. 4 is a perspective view showing a structure (fixing means) for fixing the digitizer of the present invention to a main body.

FIGS. 5A and 5B are longitudinal sectional views showing one embodiment of the present invention, wherein FIG. 5A shows a state of normal use, and FIG.

FIG. 6 is a perspective view of a terminal of the present invention.

FIG. 7 is an enlarged view of a portion A in FIG.

FIG. 8 is a sectional view showing another embodiment of the present invention.

FIG. 9 is a perspective view of another terminal of the present invention.

FIG. 10 is a sectional view showing the structure of the terminal of FIG. 9;

FIG. 11 is a perspective view of another terminal of the present invention.

FIG. 12 is a perspective view showing another embodiment of the present invention.

13 is a partial longitudinal sectional view showing the structure of the terminal shown in FIG.

FIGS. 14A and 14B are longitudinal sectional views showing the structure of a conventional digitizer, wherein FIG. 14A is a diagram of a case of only an upper film, and FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Main body of portable information terminal 11 Display part 12a Guide groove 13 First terminal 13a Spring 13b Printed circuit board 13c Metal ball 14 Notch (fixing means) 15 Connector socket 16 Dummy socket 20 Digitizer 21 Frame 21a Convex part 21b Leaf spring 21c Locking piece (fixing means) 21d Rail 22 Second terminal (clip-shaped terminal) 22a, 22b Upper piece 22d Original piece 22e, 22f Branch piece 22g Lower piece 24 Base glass 25 Upper film

──────────────────────────────────────────────────続 き Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G06F 3/03 G06F 3/033-3/037 G06F 1/16

Claims (5)

(57) [Claims] 1. A display provided in a portable information terminal is provided with guide grooves along both sides thereof, and a side of a digitizer mounted on the display is provided with a guide groove. Is provided with a slidable part,
A digitizer structure for a portable information terminal, wherein the digitizer is reversibly mounted. 2. A display unit provided in the portable information terminal is provided with guide grooves along both sides thereof, and a digitizer mounted on the display unit is inserted along the guide grooves. The digitizer structure of a portable information terminal, wherein the digitizer is configured to be reversible. 3. The portable information terminal device according to claim 1, wherein a terminal is formed by a metal ball urged by a spring, and a terminal for contacting the metal ball is provided on the digitizer side. Item 3. The digitizer structure of a portable information terminal according to item 1 or 2. 4. The digitizer-side terminal is supported with the base glass of the digitizer interposed therebetween.
4. The structure of a digitizer of a portable information terminal according to claim 3, wherein the wiring pattern of the digitizer is sandwiched between the terminal and the base glass so as to be electrically connected. 5. The portable information according to claim 1, further comprising fixing means for engaging the side of the digitizer with the side of the display to fix the digitizer. The structure of the digitizer of the terminal.