JPH0528492Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a means and structure for switching the operating time of a cylindrical recorder that complies with JIS specifications. The purpose of the idea is to switch between one-day use and seven-day use, for example, without changing the crystal oscillator that drives the cylinder, the motor, and the mechanical transmission mechanism from the motor to the cylinder. For this purpose, the usage time can be changed using an external switch. This external switch is configured to control a drive circuit and change the drive cycle of the step motor using its output. Conventionally, when changing the usage time, the gears of the mechanical transmission mechanism had to be replaced and assembled, which was troublesome, and the drawbacks were the complexity of the structure and the difficulty in achieving accuracy. Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a plan view showing the transmission structure of an embodiment of the present invention. 1 is the coil, 2 is the stator, 3
is a rotor, and 1, 2, and 3 constitute a step motor. 4 is a reduction gear train extending from the rotor 1 to the cylinder 5. In this embodiment, a deceleration of 1/43200 is performed. Note that the reduction ratio up to reduction gear 6 is 1/
If it is 21600, let's say that the rotation period of rotor 3 is 2.
When expressed in seconds, the speed reduction wheel has the same period as the hour hand on a regular clock. This is convenient because a general clock mechanism can be applied to the structure of the reduction gear 6. In addition, in this embodiment, the number of teeth of pinion 7 of reduction gear 6 is
The number of teeth of the central gear on the cylinder 5 was set to 88. 88 teeth is JIS when the cylinder nominal diameter is 93mm
This is the one set in . If the rotation period of the rotor 3 is 2 seconds, the period of the cylinder 5 is 24 hours. The purpose of the present invention is to select the rotation period of the cylinder 5 in accordance with JIS while keeping the mechanical configuration as shown in FIG. 1 unchanged.

According to JIS, a cylinder with a nominal diameter of 93 mm has a usage time of 26 hours and 36 minutes for one day, and 175 hours for a usage time of seven days.
A cylindrical period of 29 minutes is specified. If the thickness of the recording paper is assumed to be approximately 0.1 mm, the effective length of the recording paper is equivalent to 264 mm for 1-day use and 280 mm for 7-day use, which is generally used. 93mm cylinder circumference 292
The effective length for each mm is 90.4% for daily use,
7-day use accounts for 95%. 5-1 in FIG. 1 indicates the effective length for one day, and 5-7 indicates the effective length for seven days. In the present invention, the step motor, reduction gear train, and crystal oscillator remain unchanged, and switching between, for example, 1-day use and 7-day use is performed by operating the drive circuit. The drive circuit outputs a drive pulse to the coil 1 shown in FIG. The 1-day version has a short pulse cycle, and the 7-day version has a long pulse cycle, but as mentioned above, the ratio of the effective length of each recording paper to the 5 circumferences of the cylinder is not equal, so simply multiply it by 7. I can't explain it. For this purpose, a plurality of electrical signals are extracted from the level of the frequency dividing stage included in the drive circuit, and are synthesized and processed to create a predetermined pulse period and a difference between the periods. When the rotor 3 rotates half a rotation with a reversal pulse and the gear reduction ratio is 1/43200, the interval between reversal pulses is calculated from the rotation period of the cylinder for a cylinder with a nominal diameter of 93 mm according to JIS, and is 1.1083 seconds for one day. For 7 days
This corresponds to 7.3117 seconds.

FIG. 2 is an electrical waveform diagram according to the embodiment, and briefly explains a method of synthesizing the intervals of inversion pulses for one day. A is the electrical signal of the frequency division stage when the crystal source oscillation is 32.768 KHz and divided by 1/2. The pulse width is shown on the left in seconds. An electrical waveform like B is created by extracting the electrical signals at the division stage level with pulse widths of 1 second, 0.0625 seconds, and 0.03125 seconds and performing AND processing. 8 is the starting line when reset. Waveform B is the sum of the above pulse widths after the reset start, that is,
Stands up after 1.094 seconds. C is a pulse differentiated at a high frequency of 2048 Hz, and is a signal generated at an interval of 1.094 seconds each time it is reset. D is an inversion pulse for driving a pulse motor that has undergone waveform shaping and inversion processing, and the interval between the inversion pulses is
1.094 seconds, which is applied to both ends of coil 1. 1.094 seconds is an error of approximately 1% compared to JIS's 1.1083 seconds. In order to improve the precision, if signals from higher frequencies of the frequency dividing stage A are also taken in and synthesized, the precision can be improved almost infinitely. The product according to the invention is thus manufactured.

FIG. 3 is a driving circuit diagram of an embodiment of the present invention. 9 is a crystal resonator, 9' is an oscillation circuit, 10 is a first frequency division stage, and 11 is a frequency division stage. Figure 3 describes switching between 1-day use and 7-day use. 12
is an external switch for switching. Reference numeral 13 denotes an AND circuit for synthesizing daily signals, which synthesizes the electrical signals of a plurality of levels from the frequency dividing stage 11. 14
is an AND circuit for synthesizing the 7-day signals, and synthesizes the electrical signals of a plurality of levels from the frequency dividing stage 11. 1
5 and 16 are AND gates which are selected and opened by the switch 12. Reference numeral 17 denotes an OR circuit, and when one-day operation is selected, for example, a reset-started waveform as shown in FIG. 2B is obtained. 18 is
It is RSFF and is reset by the 2K hertz high frequency from the first frequency dividing stage 10, and is set at the rising edge of the output of the OR circuit 16. The output of the RSFF 18 produces whisker-like pulses when reset immediately after being set. Figure 2C. 19 is a reset line of the frequency dividing stage 11. Each time there is an output from the RSFF 18, the frequency dividing stage 11 is reset and started, so that a pulse with a period of 1.094 seconds is generated on the output line 20.
Reference numeral 21 is a toggle type FF that performs inversion processing. There is waveform shaping for the pulse motor, and waveform D in FIG. 2 is applied to both ends of the coil 1. In this way, the cylinder 5 of FIG. 1 moves at a selected period. In the description of the embodiment, selection of 1-day use and 7-day use was described, but it is also possible to select including 2-hour use, 31-day use, and 62-day use using the same method. Furthermore, it is equally possible to perform composition processing on the other selection without performing composition processing on one of the selections. It is also possible to select one of them without specifying it. In the present invention, what is referred to as a synthesis circuit also includes methods of frequency division stage synthesis processing including coincidence detection processing other than the present embodiment. Further, there are two types of cylindrical recorders: one in which the cylinder 5 is driven externally, and the other in which a driving section is provided inside the cylinder, and the present invention is applicable to both types. According to the present invention, it is possible to change the usage time extremely easily and quickly in a cylindrical recorder including JIS specifications, and it also simplifies the mechanical structure of the recorder, makes it cheaper, reduces failure rate, and improves accuracy. can be improved.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing the transmission configuration of an embodiment of the present invention, FIG. 2 is an electric waveform diagram for explaining the embodiment of the present invention, and FIG. 3 is a drive circuit diagram of the embodiment of the present invention. . 5... Cylinder, 5-1, 5-7... Recording paper effective length, 1... Coil, 2... Stator, 3... Rotor, 4... Reduction gear train, 9... Crystal oscillator, 11 ...Frequency division stage, 13, 14...AND circuit which is a synthesis circuit, 12...Switch.

Claims (1)

[Scope of utility model registration request] Under the conditions that the nominal diameter of the cylinder and its circumferential speed are set in the JIS standard, at least two types of prescribed recording paper corresponding to the respective usage times are obtained by wrapping prescribed recording paper of different usage times around the same cylinder. In a cylindrical recorder that has means for selecting the rotational speed of the cylinder so as to obtain the peripheral speed, there is only one crystal oscillator, a crystal oscillation circuit, and a frequency divider that divides the output frequency of the crystal oscillation circuit by 1/2. a combining circuit having at least two groups of input signals consisting of electrical signals extracted from a plurality of intermediate or final stages of the frequency dividing circuit; a switch and a gate circuit that output a signal having a period corresponding to the circumferential speed to the synthesis circuit; a drive circuit that uses the output of the synthesis circuit as a drive signal; and a step motor driven by the drive circuit. and a fixed reduction gear train in meshing state that drives the cylinder from the rotor shaft of the step motor, and when switching the predetermined circumferential speed, the reduction gear train is operated without touching the reduction gear train. A cylindrical recorder that can be operated using only a switch.