JPH0656829U - Stylus pen - Google Patents

Abstract

(57) [Summary] [Purpose] The number of parts and the number of assembling steps are small, the assembling process is easy, and the strength is higher than before. [Structure] A stepped portion is provided inside the pen shaft 11, and a snap fit 15 is provided at the rear end of the component holder 10. [Effect] In addition to the achievement of the above object, it facilitates the molding of parts and is more suitable for mass production.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cordless stylus pen used in a coordinate input device.

[0002]

[Prior art]

 FIG. 2 shows an example of a conventional stylus pen of this type. The component holder 50 is a member that holds electronic components such as trimmer capacitors 56 and 57 and mechanical components such as the core 59, and is housed in the pen shaft. Here, the pen shaft is a housing of the pen and a member that the user holds when using the pen. In the conventional example shown in FIG. 2, the pen shaft is separated at substantially the center thereof, and the pen shaft is composed of two members, a pen shaft front portion 51 and a pen shaft rear portion 52.

That is, at the time of assembly, the component holder 50 was inserted into the pen shaft front portion 51 and adhered thereto, and then the pen shaft rear portion 52 was adhered to the pen shaft front portion 51.

Furthermore, the pen shaft front portion 51 was provided with a hole for attaching the side switch knob 54. On the other hand, the trimmer capacitors 56 and 57 must be arranged in the mounting holes of the side switch knobs 54 on the pen shaft front portion 51 in order to satisfy the electronic circuit design requirement that the individual adjustments are required for each product during assembly. Adjustment holes for the trimmer capacitors 56 and 57 were provided. Therefore, the side switch knob 54 is larger than the size necessary to function as the original side switch knob as shown in FIG. 2 so as to cover the adjustment holes of the trimmer capacitors 56 and 57. It was a thing.

[0005]

[Problems to be solved by the device]

 However, the stylus pen has a problem that the pen shaft is not sufficiently strong because the pen shaft is composed of two members separated at substantially the center thereof. Also, bonding by adhesion consists of steps such as application of adhesive, drying, and pressing for a certain period of time after bonding, and if any of these steps is insufficient, the expected strength There was a problem that could not be obtained. In addition, inserting the component holder 50 into the front portion 51 of the pen shaft from the rear side and adhering the component holder 50 has a problem in relation to how to receive a writing pressure load from the tip of the pen. This is because the direction of applying pressure when adhering and the direction of receiving pen pressure when using the pen are completely opposite.

In view of the above-mentioned problems of the prior art, the present invention mainly improves the members constituting the appearance of the stylus pen, thereby reducing the number of parts and the number of assembling steps, facilitating the assembling process and more than the conventional method. The purpose is to provide a stylus pen that brings the strength of the.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the stylus pen according to the present invention is a cordless stylus pen in which electronic parts and mechanism parts are housed in a pen shaft, and the pen shaft is formed of a cylinder having a step portion inside and A snap-fit is provided at the rear end of the component holder that is stored in the shaft.

It is effective to insert a pen tip cover into the tip of the pen shaft.

Further, it is preferable to insert a pen rear cover at the rear end of the pen shaft.

Further, a side switch knob is provided at a portion of the pen shaft where the finger is touched when the pen is used, and a hole provided in the pen shaft for mounting the side switch knob is formed in the hole so as to also serve as an adjustment hole of the trimmer capacitor. Trimmer capacitors can be provided at corresponding positions.

[0011]

Since the stylus pen according to the present invention is configured as described above, when the component holder is inserted into the pen shaft, the component holder and the pen shaft are instantly mechanically connected.

The pen tip cover inserted into the tip of the pen shaft works so as to press the rear end of the component holder against the stepped portion inside the pen shaft.

Further, the pen rear cover inserted into the rear end of the pen shaft functions to cover the rear end of the pen shaft after the trimmer capacitor located at the rear end of the component holder is adjusted.

Further, the hole provided in the pen shaft for attaching the side switch knob functions so that the side switch knob can be attached after adjusting the trimmer capacitor.

[0015]

【Example】

 FIG. 1 shows an embodiment of a stylus pen of the present invention. Since the present invention mainly improves the members constituting the appearance of the stylus pen, the electronic parts such as the trimmer capacitors 16 and 17 mounted on the part holder 10 and the mechanical parts such as the core body 19 will be described. Although omitted, it is disclosed in detail in “Stylus Spen” (Japanese Patent Application No. 3-136770) proposed by the same applicant.

The pen shaft 11 has a stepped portion inside a cylindrical member. Here, the stepped portion means a portion whose inner diameter is smaller than other portions over a certain length. It is easier to manufacture a member having such a shape from a plastic molded product by injection molding technology, and a product with high dimensional accuracy can be obtained.

A snap fit 15 is provided at the rear end of the component holder 10 housed in the pen shaft 11. As disclosed in Japanese Patent Application No. 3-136770, the component holder 10 is formed as a plastic molded product, but the snap fit 15 is integrated with the component holder 10 as a part of the component holder 10. Formed.

The snap fit 15 is made of a plastic molded product as described above. When the component holder 10 is gradually inserted into the pen shaft 11, first, the rear end of the snap fit 15 is inserted into the pen. It contacts the stepped portion of the shaft 11. When it is pushed in again, the snap fit 15 has a shape as shown in Fig. 1 so that the snap fit 15 also plays a role like a leaf spring, and the snap fit 15 slightly bends and is inserted beyond the stepped portion. Will be done. Then, when the surface that should be the rear end surface of the part holder 10 is pressed against the front surface of the stepped portion if the snap fit 15 is not applied, the hooked portion of the snap fit 15 will be caught at the rear end of the stepped portion. .

If the shape and size of the stepped portion of the pen shaft 11 and the snap fit 15 are designed to be fitted to each other, the pen shaft will be free from rattling due to the high dimensional accuracy of injection molding. The mechanical connection between 11 and the component holder 10 is made.

Further, the writing pressure load applied to the core body 19 is evenly transmitted to the stepped portion of the pen shaft 11 via the component holder 10.

The pen tip cover 12 is press fitted into the tip of the pen shaft 11. Here, the pen tip cover is a member that protects the stored items integrally with the pen shaft, and protects them without impairing the functions of the members such as the core of the pen provided at the pen tip. Say something. That is, the core body 19 exerts its original function when exposed from the hole provided at the tip of the pen tip cover 12. The pen tip cover 12 not only protects the pen core body 19 and other members, but also presses the pen core cover 19 to press the component holder 10 against the stepped portion of the pen shaft 11.

The pen rear cover 13 is press fitted into the rear end of the pen shaft 11. Here, the pen rear cover is a member that protects stored items integrally with the pen shaft, and is provided at the end opposite to the pen tip cover. The presence of the post-pen cover 13 not only enables the trimmer capacitor 16 to be adjusted, but also when the pen shaft 11 and the component holder 10 are mated with each other and need to be removed for some reason, It is meaningful to insert a tool such as a flat-blade screwdriver or a special jig from the rear of the shaft 11 and remove the catch of the snap fit 15 on the stepped portion of the pen shaft 11 to enable it.

The side switch knob 14 is a knob for enabling the side switch 18 to be turned on and off. When the pen user grips the pen shaft 11 and uses the pen, the pen shaft 11 is attached to a portion of the pen shaft 11 where the finger touches. A mounting hole for this purpose is provided in the pen shaft 11, which also serves as an adjusting hole for the trimmer capacitor 17.

[0024]

[Effect of device]

 Since the present invention is configured as described above, it has the following effects.

Compared with the conventional bonding method that involves three steps of applying an adhesive, drying, and pressing after bonding, as compared with the conventional method of bonding, it is only necessary to insert it, resulting in a significantly shorter assembly process. Reduction was realized.

In addition, the disadvantage that the pressing direction at the time of adhesion and the direction of receiving the writing pressure load are opposite is eliminated, and there is no rattling in mechanical connection or joining between the members without bonding. Was realized without.

Furthermore, simplification in injection molding technology has been realized. That is, in the conventional case, the front portion of the pen shaft is tapered so that the tip end thereof is tapered, and it is necessary to hold a member for accommodating such as the core body 59 and the like, so that a considerable accuracy is required for the thickness of the molded product. It was Although this does not make molding impossible, it caused complications in molding such as adjusting the gate balance in injection molding. According to the present invention, the shape of the pen shaft is further simplified, and by separating the pen tip cover from the pen shaft, molding of the parts becomes easier.

Further, the ease of molding also brings about a cost reduction.

Further, it becomes possible to easily adjust the trimmer capacitor and to make the side switch knob small.

As described above, it can be said that the present invention provides a stylus pen more suitable for mass production, mainly by modifying the structure or shape of the members constituting the appearance thereof.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a main part showing an embodiment of a stylus pen of the present invention.

FIG. 2 is a main part configuration diagram showing an example of a conventional stylus pen.

[Explanation of symbols]

 10,50 Parts holder 11 Pen shaft 12 Pen tip cover 13 Pen rear cover 14,54 Side switch knob 15 Snap fit 16,17,56,57 Trimmer condenser 18,58 Side switch 19,59 Core body 51 Pen shaft front part 52 Pen shaft rear part

[Procedure amendment]

[Submission date] July 19, 1991

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

[Figure 1]

Claims (4)

[Scope of utility model registration request] 1. A cordless stylus pen in which electronic parts and mechanical parts are housed in a pen shaft, wherein the pen shaft is made of a cylinder having a stepped portion inside, and a rear part holder is housed in the pen shaft. A stylus pen with a snap fit on the end. 2. The stylus pen according to claim 1, wherein a pen tip cover is inserted into the tip of the pen shaft. 3. The stylus pen according to claim 1, wherein a pen rear cover is fitted on the rear end of the pen shaft. 4. A side switch knob is provided on a portion of the pen shaft where a finger touches when the pen is used, and a hole provided on the pen shaft for attaching the side switch knob corresponds to the trimmer capacitor adjusting hole. The stylus pen according to claim 1, 2 or 3, wherein a trimmer capacitor is provided at a position where the stylus pen is provided.