JPH0595764U - Stamp - Google Patents

Abstract

(57) [Summary] [Purpose] Since the printing body is always located inside the outer cylinder and protrudes from the outer cylinder when in use, the desk top and paper surface are not accidentally soiled.
In addition, the stamping force applied to the printing body is kept constant, enabling clear marking. A stamp having a shape memory alloy interposed between a fixing plate on one end side of a shaft and a stopper provided on an inner wall of an outer cylinder, and a coil spring constantly holding a printing body inward from a lower end of the outer cylinder.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a stamp.

[Prior Art]

 In conventional stamps, the printing body is always located inside the outer cylinder (or slide), and the printing surface does not come into contact with the paper surface even when it is placed on the desk during storage or use. This type of stamp can be imprinted at any time by simply pressing it, so it is erroneously pressed and the desk top and the paper surface are stained with ink. For example, Japanese Utility Model Publication No. 48-23538, Japanese Utility Model Publication No. 50-24814, and Japanese Utility Model Publication No. 55-20530 are known. All of these devices have the drawback that they can be stamped by pressing, so that the desk and the paper surface become dirty. Further, the printing body pressing force at the time of stamping is difficult for the stamper to adjust, or the stamping force is difficult to adjust because it is an elastic force due to a slight compression of the coil spring.

[0002]

[Problems to be solved by the device]

 The present invention uses the stamp of the printing body, the printing body is always located inward of the outer cylinder, and it is in a state where printing cannot be performed at all times.When used, the printing body is slightly projected from the lower end of the outer cylinder. This is a stamp that allows the stamping pressure to be kept constant.

[0003]

[Means for solving problems]

 A shape memory alloy 7 was provided between the fixed plate 4 and the stopper 6, and the coiled spring 8 always positioned the printed body 2 inward of the lower end of the outer cylinder 5.

[0004]

[Action]

 The shape memory alloy 7 is shrunk, and the printing body 2 is projected from the lower end of the outer cylinder 5 so that printing can be performed.

[0005]

Embodiments Embodiments of the present invention will be specifically described below. Embodiment 1 of the present invention is shown in FIG. Reference numeral 1 denotes a print body holding frame, which is made of metal, synthetic resin, or the like. Reference numeral 2 denotes a printing body, which is a printing body made of porous rubber impregnated with ink. Reference numeral 3 is a shaft, which is connected to the fixed plate 4 at one end and to the upper surface of the print body holding frame 1 at the other end. The shaft 3 and the fixing plate 4 are preferably made of synthetic resin, but needless to say, may be made of metal. Reference numeral 5 is an outer cylinder. A stopper 6 is provided on the inner wall of the outer cylinder 5. A spring receiver 9 is provided on the inner wall of the outer cylinder top plate. 7 is a shape memory alloy, which has the shape of a coil spring and has the property of returning to its original shape at 50 ° C to 70 ° C. It can be easily deformed with a small force at room temperature. One end of the shape memory alloy 7 is fixed to the fixed plate 4, and the other end is fixed to the stopper 6. Further, each terminal of the shape memory alloy 7 is connected to the battery 10 and the switch 11. Reference numeral 8 denotes a coil spring which constantly pulls the fixing plate 4 upward to hold the printing body 2 inward of the outer cylinder 5. Next, when using the stamp, when the switch 11 is turned on, the shape memory alloy 7 is heated, contracts against the force of the coil spring 8, and moves the print body holding frame 1 downward, The printing body 2 is projected from the lower end of the outer cylinder 5 so that the printing can be performed. The stamping pressing force is the difference between the contracting force of the shape memory alloy 7 and the contracting force of the coil spring 8. If left untouched after printing, the shape memory alloy 7 returns to normal temperature, and the force of the coil spring 8 causes the printed body 2 to return inward from the lower end of the outer cylinder 5. In this embodiment, the positions of the coil spring 8 and the shape memory alloy 7 may be exchanged, and if a power source of 100 V AC is used instead of the battery 10, heating can be instantly performed. The temperature at which the shape memory alloy 7 returns to the original temperature may be at least 40 ° C. or higher, and the heating method is not limited to this example.

A second embodiment of the present invention is shown in FIG. The description of the configuration overlapping with that of the first embodiment will be omitted. The fixed plate 4 is provided with a coil spring receiver 9 ″ and the stopper 6 is provided with a coil spring receiver 9 ′, and the coil spring 8 always pushes the printed body 2 upward at room temperature. It is provided on the outer side of 8, and its both terminals are connected to the battery 10 and the switch 11. 12 is a lid for replacing the battery, and the stamping force is the contraction force of the shape memory alloy 7 and the coil spring 8. The difference in resilience is the same as in Example 1 when using the stamp of this embodiment.As described above, in the stamps of each embodiment, the printing body 2 is always inward from the lower end of the outer cylinder 5. When it is held and used, the shape memory alloy 7 is heated so that the printing body 2 is projected from the lower end of the outer cylinder 5, and the stamping force can be made constant by the contraction force of the coil spring 8 and the shape memory alloy 7.

[0007]

【effect】

 Since the printing sheet 2 is configured as described above, the printing body 2 is only exposed during use, and therefore the desk top and the paper surface are not accidentally soiled. Furthermore, since the stamping pressure is constant, clear marking can be performed.

[Brief description of drawings]

FIG. 1 is a partially broken sectional view of a first embodiment of the present invention.

FIG. 2 is a partially broken sectional view of a second embodiment of the present invention.

[Explanation of symbols]

 1 Printed material holding frame 2 Printed material 5 Outer cylinder 7 Shape memory alloy 8 Coil spring

Claims (1)

[Scope of utility model registration request] 1. A print body holding frame 1 holds a print body 2;
A fixed plate 4 is fixed to one end side of the shaft 3 and the other end side is fixed to the print body holding frame 1, and a shape memory alloy 7 is interposed between the fixed plate 4 and a stopper 6 provided on the inner wall of the outer cylinder 5. A stamp characterized in that the print body 2 is held inward from the lower end of the outer cylinder 5 by a coil spring 8 at all times.