JPS62192050A - Rental video apparatus - Google Patents

Abstract

PURPOSE:To make it possible to back up a timer for a long time even when a cheap primary battery is used, by cutting off a conduction to a timer from a back up power source hereafter when the lapse of a regulated time is detected by a timer means. CONSTITUTION:In a rental video apparatus, when the counting circuit 3 of a timer means 8 counts a clock pulse, and a counted value arrives at a regulated value, an output goes from an L level to an H level, and transistors Q41 and Q42 are turned off, and a back up power source switch circuit 4 goes to an off state, and voltage supplying from a back up battery 5 to each part is terminated. A switch SW62 is turned off at a discrimination circuit 6, and an output voltage V0 goes to 0V, therefore, a state where a reproduction is impossible is generated. The off state of the circuit 4 continues until a push SWS11 in a trigger circuit 1 is depressed, and no power consumption in the battery 5 is rendered, thereby, an unnecessary battery exhaustion can be prevented.

Description

[Detailed description of the invention] Industrial applications The present invention relates to rental video equipment.

2. Description of the Related Art An example of a device to which the above rental video equipment is applied is a video tape recorder (hereinafter referred to as a VTR). Conventionally, a rental VTR configured to limit the period of use has been configured as shown in FIG. That is, the VTR main body 15 is connected to the ACffi source input terminal 11 via the switch circuit 14, and opening and closing of the switch circuit 14 is controlled by a timer circuit 12 supplied with power from the AC power input terminal 11.

To briefly explain the operation of FIG. 3, first, by pressing the start switch circuit 13, the timer circuit 12 starts integrating the energization time, turns on the switch circuit 14, and supplies the ACffi power to the VTR main body 15. Make it available for use. When the cumulative time of the timer circuit 12 reaches a specified time, the timer circuit 12 turns off the switch circuit 14 and turns off the power to the VTR body 15, making it unusable.

Problems to be Solved by the Invention However, with the conventional configuration that integrates the energization time as described above, it is difficult to solve the problem, especially when using a rental V that the user takes home and uses.
TR has the following problems.

In other words, if the user wants to be unable to use the device after the rental period has passed, for example, if the rental period is one week, the specified time of the timer circuit 12 is set to 24 hours x 7 days = 168 hours and the rental is made. However, if the user who received the rental only uses it for one hour a day, even after the 7-day rental period, a total of 168
■This creates an inconvenient situation for the lending side, where the TR15 can be used for a long period of time. In other words, by disabling playback after the rental period has passed, the problem is that it does not meet the needs of facilitating customer management and preventing theft and loss of VTRs.

Therefore, instead of limiting the usable state by the cumulative value of the energization time, it may be possible to limit the usable state by the elapsed time from the rental time, but in this case, it is necessary to operate the timer circuit using a backup power source. There is. Furthermore, in this case, it is necessary to reduce the power consumption of the timer circuit as much as possible, and to use an inexpensive and long-life backup power source.

In general, the lifespan of large-capacity capacitors and rechargeable secondary batteries, which are often used as backup power sources, is semi-permanent, but if they are sufficiently charged after being energized for a long time, they can be used as short-term backup power sources. There are products that are left in stores, such as rental VTRs, or are only turned on for a short period of time when the user borrows them and returns home.The time when the power is not on is much longer than the time when the power is on, so the earning rate is low. When considering low usage patterns, they have no advantages compared to primary batteries, and have the disadvantage of being high in cost. Further, even if a primary battery is used, a long-life lithium battery has the drawback of high cost.

SUMMARY OF THE INVENTION An object of the present invention is to provide rental video equipment that can back up a timer circuit for a long period of time even when a general inexpensive primary battery is used instead of an expensive primary battery that can be expected to have a long life.

Means for Solving the Problems The rental video equipment of the present invention includes a timer means that counts clock signals and turns the operating state of the video equipment into an unusable state when the counted value reaches a predetermined value, and the video equipment main body. A backup power source is provided which is independent from the power source of the device and backs up the timer means, and is configured to render the main body of the video equipment unusable after the timer means detects the elapse of a specified time. According to this structure, the timer means is characterized in that the timer means is provided with a backup power switch circuit that turns off the communication from the backup power source 11i after a predetermined time has elapsed. !
Since the video equipment is back-amplified by the source, the time elapsed from the rental start time is counted regardless of the power supply state of the video equipment itself, and when the timer means has finished counting the specified value, the video equipment itself is rendered unusable. A backup power switch circuit switches to reduce consumption of the backup power supply.

Embodiments Hereinafter, embodiments of the present invention will be explained based on FIGS. 1 and 2.

FIG. 1 shows a first embodiment. 1 is Bush switch S
□, a trigger circuit consisting of a resistor R□, 2 an oscillation circuit that generates clock pulses of a constant period, 3 counts the clock pulses, and when the counted value reaches a specified value, the output changes from the rLJ level. rHJ level, r I-I
A counting circuit that is reset by a J-level reset signal,
4 is a transistor Q4. .

04m, diode D 411 DJ21 D43, and resistor R4.

A backup power switch circuit composed of R421R4ff, 5 is a 7-volt battery as a backup power source, 6 is a comparator 61, a switch 6□, and a resistor R6
□, RG□, a discrimination circuit that turns on the switch 62 when the output voltage of the backup power switch circuit 4 is equal to or higher than the comparison voltage V set by the resistors R61 and R6□; This is a VTR main body as a video equipment main body that supplies VQC and is controlled to enable or disable playback by the output voltage of a switch 6□.

Here, the oscillation circuit 2, the counting circuit 3, and the discrimination circuit 6 constitute a timer means 8 as claimed in the claims.

First, when the bush switch S11 is pressed, a base current flows through the transistor Q42, turning it into a transistor 1', and a reset voltage is applied to the counting circuit 3, so that the output reaches the rlJ level. Then, the transistor Q41 is turned on and the base current of the transistor Q42 flows, so that even if the switch S is turned off, the transistor Q4z is kept on from then on. In other words, voltage is supplied from the battery 5 to each part through the backup power switch circuit 4 which is kept in the on state, and the counting circuit 3 is powered by the bushing switch S□
, turns off, and when the reset is released, a pulse cursor (~ starts).On the other hand, when the VTR main body 7 is in the energized state.

The power supply voltage Vco is applied to the discrimination circuit 6, and the comparator 6
Since the battery voltage VU, which is higher than the comparison voltage Vr of □, is applied as the compared input, the switch 6□ is turned "on",
The output voltage becomes v o ” v cc. This output voltage V
If, for example, input the power supply voltage to the video circuit system of the VTR main body 7, it is possible to easily control whether or not to allow reproduction, and in the above case, the reproduction is possible.

Next, the counting circuit 3 outputs clock pulses from 1 to 1, and when the count value reaches the specified value, the output changes from rLJ level to rI
IJ level, transistor Q4□ is turned off, and therefore transistor Q42 is also turned off, that is, the backup power switch circuit 4 is turned off.

On the other hand, the voltage supply from the battery 5 to each part is stopped.

In the discrimination circuit 6, the switch 6□ is turned off and the output 'heavy pressure V
Since o=O volts, it becomes impossible to reproduce.

This OFF state of the backup FF power switch circuit 4 continues until the bushing switch S, □ is pressed again.
There is no power consumption of battery 5. In addition, Bushu Switch S
The xh is installed in blue so that it can only be operated at the store when being loaned.

As described above, according to this embodiment, after the specified count value, that is, the set time, the backup power switch circuit is turned off and the voltage supply to all circuits is stopped, so unnecessary battery consumption can be prevented. Operation is also possible with a push switch S11
It is very easy to use as you just press . Furthermore, since the compared input to the discrimination circuit 6 after the timer starts is the output voltage of the backup power switch circuit 4, that is, the voltage itself of the voltage 5, the battery voltage can be changed by setting the comparison input voltage ■ to the battery replacement voltage. You can also check.

FIG. 2 shows a second embodiment, and the same reference numerals are used to denote the same functions as in the second embodiment, and the explanation thereof will be omitted.

The difference from FIG. 1 is that the comparison human power V is applied to the non-inverting input terminal of the comparator 6□ of the discrimination circuit 6, and the output voltage of the counting circuit 3 is applied to the inverting input terminal e of the compared input, and The point is that the power supply voltage of the circuit 3 is always supplied directly from the battery 5.

In the case of FIG. 2, when the button switch S is pressed, the counting circuit 3 is reset and the output goes to the "L" level, the backup source switch circuit 4 is held in the on state, and the oscillation circuit 2 is energized and starts operating. Further, since the compared input of the discrimination circuit 6 is at the "L" level of the counting circuit 3 which is lower than the comparison voltage vr, the comparator 61 is on, the switch 62 is also on, and the output voltage V o
" V c c and the VTR body 7 becomes ready for playback. Next, when the count value of the counting circuit 3 reaches the specified value, the output changes from rLJ to rHJ, and the backup power switch circuit 4 turns off. Oscillation circuit 2 stops operating.

Therefore, the output of the counting circuit 3 remains as "■(", the comparator 6 of the discrimination circuit 6 is off, the switch 6□ is also off, the output voltage VO=O, and the VTR main body 7 becomes unable to reproduce. This off state of the backup power switch circuit 4 continues until the switch SIL is pressed again and the output of the counting circuit 3 is reset from rHJ to rLJ.
During this period, the counting circuit 3 is in a stationary state without any clock pulse input, and its power consumption can be reduced to a negligible level, so that the battery 5 is hardly consumed.

As described above, even in this second embodiment, the consumption of the battery 5 is small and the operation is simple. Moreover, unlike the first embodiment, since the VTR body 7 is made usable when the output of the counting circuit 3 as the compared input of the discriminating circuit 6 is rl=J, the voltage of the battery 5 is In the event of an accident where the battery 5 becomes low due to some reason or the battery 5 is disconnected, there is a fail-safe function on the usable side, making it difficult for users to complain.

In FIG. 2, voltage is constantly applied to the counting circuit 3 from the battery 5, and power is applied to the oscillation circuit 2 from the battery 5 via the backup power switch circuit 4; It is also possible to reduce power consumption by constantly applying a voltage and turning the voltage to the counting circuit 3 on and off using the backup power switch circuit 4.

In addition, 1. In the second embodiment, the bush switch 811 is used, but it may be replaced with a reed switch operated by a magnet or the like.Also, the display circuit for indicating whether or not the VTR body 7 is ready for use is replaced with a discriminating circuit. It is also easy to add the backup power switch circuit 4 inside the transistor Q4.
J, remove diodes D4□ and D43, and replace diode D
4. It is also possible to operate the circuit in a configuration in which it is directly connected to the output of the counting circuit 3. Furthermore, the video equipment itself must comply with the above V'E.
” It goes without saying that the invention is not limited to the R main unit, but can be applied to all portable video equipment.

As described in the detailed description of the invention, the rental video equipment of the present invention is configured such that when the timer means detects the passage of a specified time, the power supply from the backup power supply backing up the timer means is turned off thereafter. Therefore, when the usable period of the rental video equipment is defined by the time elapsed from the start of rental by the timer means, the power consumption of the backup battery can be reduced, and a low-cost primary battery can be used as the backup power source. It can also be used as a battery with a long power supply life, and stable operation of the timer means can be expected over a long period of time.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a first embodiment of rental video equipment of the present invention, FIG. 2 is a block diagram of a second embodiment, and FIG. 3 is a block diagram of a conventional example.

Claims (1)

[Claims] 1. A timer means for counting clock signals and disabling the operating state of the video equipment body when the counted value reaches a predetermined value, and a separate power supply independent of the power supply for the video equipment body. Yes, the timer means is provided with a backup power source that backs up the timer means, and is configured to render the main body of the video equipment in an unusable state after the timer means detects the elapse of a specified time, and the timer means is configured to turn on power from the backup power source after the elapse of the specified time. Rental video equipment equipped with a backup power switch circuit to turn off the power. 2. The timer means includes an oscillator circuit that generates clock pulses of a constant period, a counting circuit that counts the number of clock pulses and inverts the output when the number exceeds a preset value, and an output of this counting circuit or a backup power switch circuit. The backup power switch circuit is configured with a discrimination circuit that discriminates the voltage level of the output and determines the operating state of the video equipment itself, and a trigger circuit that starts the operation of the oscillation circuit and counting circuit.When the output is detected, the backup power switch circuit oscillates from the backup power supply Turn on the voltage supply to at least one of the circuit and the counting circuit,
The rental video equipment according to claim 1, characterized in that it is configured to be turned off by the output of the counting circuit. 3. The backup power switch circuit is configured to turn on/off the voltage supply to both the oscillation circuit and the counting circuit, and the discrimination circuit, which operates by being supplied with voltage from the power supply of the video equipment, is configured to be connected to the backup power switch circuit. 3. The rental video equipment according to claim 2, wherein the video equipment itself is rendered unusable when the output is below a set voltage. 4. The counting circuit is always supplied with voltage from the backup power source, the backup power switch circuit is configured to turn on and off the voltage supply to the oscillation circuit, and the discrimination circuit is configured to operate by being supplied with voltage from the power source of the video equipment itself. 3. The rental video equipment according to claim 2, wherein the video equipment itself is rendered unusable when the output voltage of the counting circuit is equal to or higher than a set voltage.