JPH0587634U - Signal detection pen - Google Patents

Abstract

(57) [Abstract] [Purpose] In a signal detection pen having a conductive shaft, the shock resistance performance of the switch against the movement of the conductive shaft is improved. An inner shaft cylinder into which a signal detecting conductive shaft is slidably fitted, a switch located at a rear end portion of the signal detecting conductive shaft, an elastic member arranged at a rear portion of the switch, and the conductive member. A conductive shaft stopper was fixed to the inner cylinder for fitting the shaft. [Effect] The switch will not be damaged even if a strong impact is applied to the pen tip or a heavy load is applied by a person with high writing pressure.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a detection pen for the input part of a digitizer, and is intended to prevent the switch from being destroyed from the impact (heavy load) that occurs when it is dropped or used by a person with high writing pressure.

[0002]

[Prior Art]

 The switch of the detection pen of various conventional tablet-type input devices detects the rearward movement of the tip of the detection pen when the tip of the detection pen comes into contact with the tablet. As a switch as this detecting means, a contact type means using a tact switch, a membrane switch or the like is adopted. A conventional example will be described with reference to FIG. Each of the front and rear ends of the shaft cylinder 1 has an opening, which penetrates from the front part to the rear part. Similar to the barrel 1, the shield pipe 2 penetrates from the front part to the rear part and is arranged inside the barrel 1. The inner shaft cylinder 3 is made separable into a cylindrical shape by combining two bodies, and is fixedly arranged inside the shield pipe 2 after being made cylindrical. A coil-shaped spring 8 is inserted between the inside of the shield pipe 2 and the inner barrel 3 to press the inner barrel 3 against the tail plug 13. The inner barrel 3 holds the conductive shaft 4 and the switch 5, and the inner barrel 3 has a support guide portion for setting the switch 5 and a support guide 9 for supporting the switch 5 from the rear and a conductive member. A groove 14 is bored in which the shaft 4, the ring 6 and the spring 7 can be set. A ring 6 for fixing the conductive shaft 4 to the inner shaft cylinder 3 is fixed to an intermediate portion of the conductive shaft 4, and a coiled spring 7 is mounted in the groove 14. The switch 5 is joined to a signal transmission cable 12 (not shown). The cable 12 is held by a tail plug 13 fitted to the rear part of the barrel 1.

[0003]

[Problems to be solved by the device]

 In the above-mentioned conventional signal detecting pen, when the detecting conductive shaft 4 receives a heavy impact or is used with a high writing pressure, there is no stopper even if the detecting conductive shaft 4 is pushed backward, The switch 5 served as a stopper. Therefore, since only the switch 5 is impacted, not only the outer shape of the switch 5 but also the internal contacts are destroyed. Then, the objective of this invention is providing the signal detection pen which solved this problem.

[0004]

[Means for Solving the Problems]

 The present invention has been made in order to solve the above-mentioned conventional problems. The inner shaft cylinder into which the signal detecting conductive shaft is slidably fitted, and the sleeve located at the rear end portion of the signal detecting conductive shaft. The present invention proposes a signal detecting pen in which a switch, a resilient member arranged at the rear portion of the switch, and a conductive shaft stopper are formed in an inner cylinder for fitting the conductive shaft.

[0005]

[Action]

 In the present invention, the inner shaft cylinder is provided with a stopper so that the conductive shaft can move only a fixed amount, and the support guide for supporting the switch of the inner shaft cylinder has a strong spring property, so that a heavy load is applied to the switch. At this time, the spring property of the support guide works until the conductive shaft is stopped by the stopper, allowing the switch to escape to the rear.

[0006]

【Example】

 Embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a vertical sectional view of a first embodiment of a signal detecting pen of the present invention, FIG. 2 is an enlarged vertical sectional view of a switch portion in the first embodiment before use, in a normal state and in a shock, and FIG. It is a longitudinal cross-sectional view of the switch unit of the embodiment. The same reference numerals are used in the same parts as in the conventional example. First, FIG. 1 will be described. A stopper 11 for restricting the amount of movement of the ring 6 is provided in the inner shaft cylinder 3, and the outer diameter of the spring 16 is made smaller than the outer diameter of the ring 6 so that the ring 6 hits the stopper 11 and the operating range of the conductive shaft 4 is increased. It has become a certain amount. The shape of the support guide 10 of the inner barrel 3 is a shape having a strong spring property. The reason why the support guide 10 needs to have a strong spring property is that the average writing pressure applied when it is generally used is about 300 g, and it is expected that a weak spring will bend even during normal use. This will affect the writing quality of.

Next, the operation will be described with reference to FIG. In normal use, when the tip of the conductive shaft 4 is brought into contact with the tablet, the ring 6 fixed to the conductive shaft 4 moves simultaneously when the conductive shaft 4 moves backward, but before the stopper 11 hits the switch 11, the switch 5 turns on the conductive shaft. ON input at the rear end of 4. Thus, in normal use, the switch 5 serves as a stopper for the conductive shaft 4. Originally, it is desirable to have a structure in which the switch 5 is turned on when the ring 6 hits the stopper 11 and stops from the beginning, but since the dimensions of each component inevitably fluctuate, the switch 5 stops when the conductive shaft 4 stops. There is a problem that is not turned on. Therefore, when the switch 5 is turned on, a gap is required between the ring 6 and the stopper 11 to absorb the dimensional variation.

Next, when a strong impact or a heavy load is applied to the tip of the conductive shaft 4, the ring 6 fixed to the conductive shaft 4 hits the stopper 11 provided on the inner shaft cylinder 3 until it stops, so that it is supported. The springiness of the guide 10 is activated to allow the entire switch 5 to escape to the rear. (See FIG. 2C) The contact between the ring 6 and the stopper 11 prevents the conductive shaft 4 from moving rearward, and when the load on the tip of the conductive shaft 4 disappears, the support guide 10 operates the switch 5 as before use. Push it back to its original position.

Next, FIG. 3 shows an embodiment in which a metal leaf spring 15 is installed between the rear portion of the switch 5 and the support guide without providing the support guide of the inner barrel 3 with spring properties. Similar to the support guide 10 of the first embodiment, the leaf spring 15 is capable of temporarily allowing the switch 5 to move rearward and restoring the strong impact and heavy load of the conductive shaft 4. Further, instead of the leaf spring 15, an elastic material such as a coil spring, and an elastic body such as sponge, rubber, urethane, or foam styrol can be applied.

[0010]

[Effect of the device]

 The present invention can be operated in the same way as the conventional one in normal use, and even if a strong impact or heavy load is applied to the pen tip, the support guide at the rear of the switch or the spring property of the elastic member works and the switch escapes backward. Therefore, it is possible to realize a structure in which only the switch is not impacted. Therefore, the switch is not destroyed.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a signal detection pen.

FIG. 2 is a longitudinal cross-sectional view of the main part of the first embodiment, showing an enlarged view before use, during normal use, and at impact

FIG. 3 is a vertical sectional view of a switch section according to a second embodiment.

FIG. 4 is a vertical cross-sectional view of a conventional switch section.

[Explanation of symbols]

 1 Shaft Tube 2 Shield Pipe 3 Inner Shaft Tube 4 Conductive Shaft 5 Switch 6 Ring 7 Spring 8 Spring 9 Support Guide 10 Support Guide 11 Stopper 12 Cable 13 Tail Plug 14 Groove 15 Leaf Spring 16 Spring

Claims (1)

[Scope of utility model registration request] 1. An inner cylinder into which a signal detecting conductive shaft is slidably fitted, a switch located at a rear end portion of the signal detecting conductive shaft, and an elastic member arranged at a rear portion of the switch. A signal detecting pen characterized in that a conductive shaft stopper is provided in an inner cylinder for fitting the conductive shaft.