JPS6145193B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION When an external device controlled by a timer has to be repaired after a certain period of use, for example, the filter of an air purifier can be repaired after a certain period of use to prevent clogging. When cleaning,
This invention relates to a cumulative time display device for a timer that displays the cumulative time after the time required for repair has elapsed, so that only the display board stops operating and continuously displays that the time required for repair has elapsed.

In the case of conventional timers, any timer indicates when the usage time that requires repair has elapsed, but if the usage time exceeds a certain amount of time, the timer is automatically reset. Therefore, if the display is not noticed within the display time, the external device connected to the timer will be operated for an excessively long time, which may cause the device to malfunction.

In order to solve this drawback, we installed a toothless gear with a toothless part on the display board that integrates and displays the operating time of the timer, and the display board drive gear, which is driven by the rotational force of the drive motor, By meshing with the toothless gear, the display board rotates with the display board drive gear in accordance with the rotation of the timer's drive motor, and the display board will not become missing after a period of use that requires repair of the external equipment. The display board drive gear is located in the missing tooth part of the gear and the display board no longer rotates, and the display board will continue to rotate unless the administrator notices that the usage time of the external equipment that requires repair has passed and resets it. A timer cumulative time display device that prevents breakdowns due to overwork of external equipment by continuously displaying that the usage time has elapsed can be found in Japanese Patent Application Laid-Open No. 161085/1985. I can do it.

However, the display board that integrates and displays the operating time of this timer is provided with a partially toothed gear having a missing tooth section, and the display board drive gear driven by the rotational force of the drive motor is engaged with the partially toothed gear on the display board. In a device in which the display board drive gear is located at the missing tooth part of the display board's missing tooth gear and the display board no longer rotates, the display board drive gear and the missing tooth of the display board drive gear Since the end of the display board drive gear is always in contact with the end of the missing tooth part, there is a problem that a rattling noise is generated due to contact between the display board drive gear and the end of the missing tooth part of the display board drive gear, and abnormal wear of the display board drive gear. In order to avoid this problem, careful attention must be paid to the selection of materials for the display board drive gear and gears with missing teeth, which is complicated in terms of design. There are financial constraints that prevent it from being used. That is, this type of device using the above-mentioned partially toothed gear rotates the partially toothed gear in a direction opposite to the direction in which the partially toothed gear is rotated by the display plate driving gear.
If the spring is not always applied, the partially toothed gear will not be reset to its home position during reset. Therefore, even if the display board driving gear is located in the missing tooth part of the missing tooth gear of the display board and the meshing between the missing tooth gear and the display board driving gear is released, the biasing force of the spring will prevent the missing tooth gear from moving. The end of the toothless part is always in contact with the display board drive gear, and the teeth of the display board drive gear are always in contact with the end of the toothless part while the timer is operating, resulting in wear of the teeth and noise. will occur.

In view of the conventional problems, the present invention selectively engages an engaging protrusion provided on a rotating display plate with a spiral groove provided on the surface of a rotating gear driven by the rotational force of a drive motor. In addition, by displaying the cumulative operation time of the timer based on the amount of rotation of the display plate that is guided and rotated by the spiral groove, noise is reduced, there are no restrictions on the material of the gear, and the structure and structure are It is an object of the present invention to provide a timer cumulative time display device that is more advantageous in terms of space than conventional display devices.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a timer cumulative time display device according to the present invention will be described in detail below with reference to the drawings.

FIG. 1 is an exploded perspective view of a timer cumulative time display device according to the present invention, FIG. 2 is a plan view of the assembled state seen from above, and FIG. 3 is a plan view seen from the back.

In Figures 1 to 3, 1 is a device board;
2 is a cover fixed to the substrate 1 with screws. A gear 3 is rotatably supported on a shaft 4 that is pivotally supported on the substrate 1, and the gear 3 is driven by the rotational force of a drive motor disposed within a known timer mechanism 5.
Reference numeral 6 denotes a rotating shaft 7 rotatably supported on the substrate 1.
The gear 6 is fixed to the gear 3, and the gear 6 is always arranged in meshing relationship with the gear 3. 8 is a gear fixed to the rotating shaft 7. A gear 9 is rotatably supported on a shaft 10 that is supported on the substrate 1, and the gear 9 is always in a meshing relationship with the gear 8. Reference numeral 11 denotes a gear rotatably supported on the base plate 1. The gear 11 is always in meshing relationship with the gear 9, and the surface facing the cover 2 has a spiral groove 11A continuous to the center position. is provided. 12 is a display board made of an elastic plate-like material. The display board 12 includes display sections 12a ₁ , 12a ₂ , 12
a ₃ , and a support plate portion 12B having a long hole 12b.
A boundary portion 12C between the support plate portion 12B and the support plate portion 12B is a bent stepped portion. The display board 12 has a support plate portion 12B.
It is rotatably supported by a pin 13 screwed into the screw hole 1b of the board 1 through the elongated hole 12b, and the surface of the gear 11 facing the helical groove 11A is engaged with the helical groove 11A. A matable engagement protrusion 14 is fixedly provided. Further, the display board 12 is a display board section 12.
When no pressing force is applied to A toward the spiral groove 11A, the display plate portion 12A has moved to a position far away from the gear 11, as shown by the solid line in FIG. The joint protrusion 14 also has a spiral groove 1.
1A is released, and when a pressing force is applied to the spiral groove 11A side, the display plate portion 12A approaches the gear 11 as shown by the dashed line in FIG. 14 is also adapted to engage with the spiral groove 11A. Further, the display plate 12 has one end engaged with a tension coil spring 16 and the other end of the tension coil spring 16 engaged with a pin 15 implanted in the substrate 1.
When the engagement between the engagement protrusion 14 of No. 2 and the spiral groove 11A of the gear 11 is released, the rotation is always returned to the clockwise direction by the biasing force of the spring 16. It is regulated by contact with a pin 17 implanted in 1. 18 obtains information on the repair status of external equipment and displays the display board section 1 of the display board 12.
The control member 18 is slidably pivoted to the substrate 1 and has a key-shaped portion 18a that is engaged with the display panel portion 12A of the display panel 12. Furthermore, it is always biased upward in FIG. 2 by a compression spring 19 disposed between the base plate 1 and the flange 18b. Therefore, when no external force is applied to the control member 18, the display plate 1
2 overcomes the elastic force of itself and moves the display plate portion 12A toward the spiral groove 11A side of the gear 11, and the engagement protrusion 1
4 and the spiral groove 11A. Reference numeral 20 denotes a rotatable actuating member for operating the sliding movement of the control member 18, which rotates around a shaft 21 as a fulcrum. The actuating member 20 is configured to rotate clockwise when, for example, a filter of an air purifier is loaded, and rotate counterclockwise when the filter is removed. Note that the actuating member 20 does not necessarily have to be a component of the present device. In addition, the cover 2 is provided with a viewing window 2A at a position corresponding to the display part of the display board 12, and this is provided when the display board 12 is in the most clockwise position as shown in the first figure. Corresponding to the display board _12a3 of the display board 12, the display board 12
As the values shift counterclockwise, the display portions 12a ₂ and 12a ₁ become corresponding to each other.

The operation of the timer cumulative time display device according to the present invention constructed as described above will now be described.

Figures 1 to 3 show the filter being removed for repair from an external device. That is, the actuating member 20 is rotated counterclockwise, and the control member 18 is displaced downward against the biasing force of the spring 19. Therefore, the display plate 12 is displaced downward by its own elastic force as shown by the solid line in FIG. 2, and the spiral groove 11 of the gear 11
The engagement with A has been released. Therefore, display board 1
2 is the regulating pin 1 due to the biasing force of the spring 16.
In this state, the engagement protrusion 1 of the display plate 12 is rotated clockwise to the position regulated by
4 is located at a position corresponding to the outermost groove part of the spiral groove 11A of the gear 11, and is located at a position corresponding to the outermost groove part of the spiral groove 11A of the gear 11.
From A, the display board _12a3 of the display board 12 is visible.

Then, when the cleaning and repair of the filter of the air purifier is finished and the filter is loaded, the actuating member 20 is rotated clockwise in response to the loading operation, thereby causing the control member 18 to move the spring 19
Due to the biasing force of the display board 12 and against the elastic force of the display board 12 itself, the display board 12 is displaced upward in FIG.
The display plate portion 12A approaches the spiral groove 11A side of the gear 11, and the engagement protrusion 14 is pressed into engagement with the spiral groove 11A. In this state, when a drive motor (not shown) is driven by the operation of the timer 5 that cooperates with the operation of external equipment, the driving force of the drive motor is transferred to the gear 3,
The signal is transmitted to the gear 11 through a speed reduction mechanism consisting of 6, 8, 9, and 11, and the gear 11 rotates. When this gear 11 rotates, the spiral groove 11A of this gear 11
Since the engagement protrusion 14 is engaged with the helical groove 11A, the engagement protrusion 14 is guided by the helical groove 11A and gradually moves toward the center of the helical groove 11A.
Therefore, the display plate 1 integrated with the engaging protrusion 14
2 also resists the biasing force of the spring 16 and rotates counterclockwise about the shaft 13 as a fulcrum. Along with this, the display portions 12a ₃ , 12a ₂ , 12a ₁ of the display board 12 corresponding to the viewing window hole 2A of the cover 2 also gradually change, and the cumulative operating time of the timer is displayed. When the engagement protrusion 14 finally reaches the center portion 11A ₁ of the spiral groove 11A, the engagement protrusion 14 is held in the center portion 11A ₁ because the center portion 11A ₁ is simply formed into a round slot. , that state continues. In this state, the display section 12 of the display board 12 is located at a position corresponding to the viewing window hole 2A.
a ₁ is located. Therefore, the administrator can see that the time for repair has come by looking at the display section _12a1 through the viewing window 2A, and this state continues as long as no cleaning and repair work is performed.

Then, the manager realized that it was time for repairs,
When the filter is removed for cleaning work, the control member 18 is moved downward in FIG. 2 as described above, and the engagement between the engagement protrusion 14 and the spiral groove 11A is released, so that the display plate 11 rotates and returns to the position where it is regulated by the regulating pin 17 due to the biasing force of the spring 16. That is, this state is the state shown in FIGS. 1 to 3.

Similarly, when the filter is cleaned and repaired and attached to an external device, the integration display will start from the origin as described above, but the outermost part of the spiral groove 12A of the gear 11 There is a guide wall 11A ₂ up to the vicinity of the outer edge of the gear.
is provided, so even if the same part of the spiral groove 11A and the engagement protrusion 14 are not always returned to the corresponding position, the guide wall _11A2 always returns them to the predetermined position during one revolution of the gear 11. He will be guided by this and will make a fresh start. In the above embodiment, the display portions 12a ₁ , 12a ₂ , 12a ₃ of the display board 12 are provided at positions corresponding to the spiral groove 11A, but the fourth
It may be configured as shown.

As explained above, the cumulative time display device of the timer of the present invention has the engagement protrusion 14 provided on the rotatable display plate 12 on the surface of the rotating gear 11 driven by the rotational force of the drive motor. Spiral groove 1 provided in
1A and displays the accumulated operating time of the timer based on the amount of rotation of the display plate 12 guided and rotated by the spiral groove 11A, making it easy to repair external equipment. Once the required usage time has elapsed, the display board will no longer operate and will continue to operate until the administrator notices that the usage time has elapsed and resets the external equipment requiring repair. Not only can it continue to display the message and prevent failures due to overwork of external equipment, but even in the warning position, the engaging protrusion simply slips in the center of the spiral groove, which is different from the conventional method. There is no rattling noise,
In addition, since the spiral groove can be used in conjunction with a part of the speed reduction mechanism,
This has the effect that a compact display device can be obtained.

Note that the elongated hole 1 provided in the display board 12 of this embodiment
2b is shaped like a long hole so that the display board 12 can move in its longitudinal direction and serves to automatically correct the accuracy of the distance between the center of rotation of the display board 12 and the spiral groove 11A.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of an integrated time display device for a timer according to the present invention, FIG. 2 is a plan view of the assembled state seen from above, and FIG. 3 is a plan view seen from the back. FIG. 4 is a perspective view showing a modification and usage example of the display board shown in FIGS. 1 to 3. 11...Gear, 11A...Spiral groove, 12...Display plate, 14...Engaging protrusion.

Claims (1)

[Claims] 1. An engagement protrusion provided on the movable display board is selectively engaged with a spiral groove provided on the surface of a rotating gear driven by the rotational force of a drive motor, and the spiral groove guides and rotates. A timer cumulative time display device, characterized in that the cumulative operating time of the timer is displayed based on the amount of rotation of the display plate.