JPH09269993A - Reset counter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reset counter with which a lock state caused by the position deviation of engagement between a display ring and a pinion can be canceled without adding any number of parts to the components of the counter. SOLUTION: Concerning the reset counter with which the engagement between the pinion and a display ring 4 is canceled when a return-to-zero(RTZ) member 5 is turned and RTZ arrangement is provided by pressing and turning a heart cam 3 of the display ring 4 through the presser level of the RTZ member 5, at the section of intermittently lacked teeth 8 positioned on the downstream side of forward rotations of the display ring 4 or continuous teeth 7 arranged on the same axial line as these intermittently lacked teeth 8, a pinion guide part 25 is provided by obliquely notching that section on the down-stream side from the peaks of teeth at the tips of these teeth toward the bottoms of the teeth.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reset counter used for a counter such as a vehicle odometer and a tape recorder, and more particularly to a display wheel alignment mechanism in the reset counter. ．

[0002]

2. Description of the Related Art A conventional device of this type is shown in FIGS.
As shown in FIG. 2, a plurality of display wheels 4 each having a heart cam 3 provided on a support shaft 2 mounted on a frame 1 are rotatably provided as a reset counter for accumulating mileage of an automobile or the like. The zeroing member 5 is rotatably supported on the frame 1 with the shaft portion 6 which is the base portion side of the zeroing member 5 as a pivot point, and is continuously connected to the lower digit side of each display wheel 4. The tooth 7 is provided, and the intermittent tooth 8 having two teeth and the engagement receiving portion 10 formed on the entire circumference except for the valley 9 between the intermittent teeth 8 are provided on the upper girder side. Is formed with a plurality of pressing levers 11 for integrally pressing and rotating the heart cams 3 of the respective display wheels 4 from the base side thereof, and is arranged between the respective display wheels 4 to display the lower digit side. A member for zeroing a plurality of pinions 12 that carry out a carry operation from the wheel 4 to the display wheel 4 on the upper digit side Is rotatably supported on a pinion support shaft 13 provided in the pinion 12, and the pinion 12 has an even number of teeth, and the tooth width of the lower-order digit side of the pinion 12 is set every other tooth of the engagement receiving portion 10. Short teeth 14 formed by notching the height and width thereof and long teeth 15 formed by extending the thickness of the engagement receiving portion 10 as they are in the axial direction are alternately provided, and the upper gear side of the pinion 12 is provided. The continuous teeth 7 and the pinion 12 of the display wheel 4 located at the position are constantly meshed, and the pinion 12
With respect to the display wheel 4 located on the lower digit side, the short teeth 14 of the pinion 12 are located along the side wall portion of the engagement receiving portion 10 of the display wheel 4, and the long teeth 15 on both sides thereof are engaged and received. Part 10
The pinion 12 abuts against the peripheral surface of the pinion 12 and is supported to prevent rotation, and maintains the meshed state between each pinion 12 and each display wheel 4.

A drive transmission gear 16 to which the rotation is transmitted to a further lower digit side of the lowest digit display wheel 4 via a flexible cable or a stepping motor arranged around the vehicle as a drive source. Is arranged and transmits the rotational drive of the drive transmission gear 16 to the display wheel 4 of the lowest digit through the intermediate gear 17 rotatably inserted in the pinion support shaft 13 to display the lowest digit. When the wheel 4 rotates, the intermittent tooth 8 of the display wheel 4 abuts on the short tooth 14 of the pinion 12, whereby the pinion 12 rotates with the display wheel 4 and the long tooth 15 of the pinion 12 has a trough 9 between the intermittent teeth 8. Then, when it rotates further, the next short tooth 14 is engaged with the engagement receiving portion 1
At the same time as being guided to the wall surface portion of 0, the long teeth 15
The long tooth 15 of the pinion 12 disengages from the engagement receiving portion 10 again.
The pinion 1 comes into contact with the peripheral surface of the
The upper digit display wheel 4 is carried up by one character by the rotation of 2. Thus, the lower digit display wheel 4 and the upper digit display wheel 4 are sequentially added and displayed via the pinion 12. It is configured to be.

A crank-shaped arm 18 for rotating the zeroing member 5 is extendedly formed on one end side of the shaft portion 6 which is the base portion of the zeroing member 5. An operation shaft 2 provided so as to be able to press and return to a bracket 19 formed on the frame 1 side via a coil spring 20.
One of the pressing pieces 22 is fitted and connected, and the coil spring 20 inserted into the operation shaft 21 urges the pressing piece 22 upward, and the urging force fits and connects to the pressing piece 22. The pinion 12 assembled to the zeroing member 5 is urged through the crank-shaped arm 18 in the direction in which the pinion 12 meshes with the display wheel 4.

When the display wheels 4 are zero-aligned,
When the operating shaft 21 is pressed against the urging force of the coil spring 20, the zero-reset member 5 rotates via the crank-shaped arm 18, whereby each pinion 12 causes the continuous teeth 7 of the display wheel 4 and the like. It is disengaged from the intermittent tooth 8 and at the same time, each pressing lever-1
1 is pressed against the heart cam 3 so that the respective display wheels 4 are aligned to zero at once, and when the pressing force of the operating shaft 21 is released thereafter, the zeroing member 5 is restored by the restoring force of the coil spring 20,
The long teeth 15 and the short teeth 14 of each pinion 12 are returned to the positions where they mesh with the continuous teeth 7 of each display wheel 4 and the engagement receiving portion 10.

Further, generally, at the time of zero-reset operation, as shown in FIG.
As shown in FIG. 1, from the meshed state of the pinion 12 shown in FIG.
As shown in FIG. 2, since the pinion 12 is separated from the display wheel 4, there is a case where the pinion 12 is deviated due to disturbance such as vibration, and when the pinion 12 is re-engaged with the display wheel 4 in this delusional state. May have a non-uniform number sequence of zero values on the display wheel 4, and in order to avoid this, the angular boss portions 23 are respectively provided on the side surface portions of the pinions 12.
Is integrally formed, and a plate-shaped elastic member 24 that presses one surface of the square boss portion 23 is provided on the zero-return member 5, and even if the pinion 12 is separated from the display wheel 4 during the zero-return operation,
The elastic member 24 presses and regulates one surface of each of the square bosses 23 to maintain the pinion 12 at a predetermined position to suppress delusion and match the meshing position between the pinion 12 and the display wheel 4 to a specified state. Display wheel 4
Is to align the sequence of zero values of
Further, the backlash caused by the meshing between the display wheel 4 and the pinion 12 can be suppressed by the elastic member 24 that presses one surface of the square boss portion 23, and the delusion of each pinion 12 due to the backlash can be suppressed. By doing so, it is possible to arrange the number strings on the display wheel 4.

[0007]

By the way, generally, when the display wheel 4 and the pinion 12 are meshed with each other, when the display wheel 4 makes one rotation, the intermittent teeth 8 formed on the display wheel 4 become pinion 12. And the next upper digit display wheel 4
Since it is configured to carry one digit by one digit, as described above, the position of each display wheel 4 is reset to the zero display position via the zero reset member 5 by pressing the operating shaft 21. As shown in FIG. 13, the meshing state of each display wheel 4 and the pinion 12 after the rotation of the pinion 12 includes the short tooth 14 of the pinion 12 immediately behind the intermittent tooth 8 of the two teeth formed on the display wheel 4. It is configured to be positioned and meshed.

Accordingly, in the case of the above-mentioned conventional structure, the pressing lever-1 of the zero-reset member 5 is pressed by the pressing of the operating shaft 21.
In the process in which 1 is pressed against the heart cam 3 of each display wheel 4 to perform the zero return operation of each display wheel 4 to the zero display position, the operation shaft 21 is released from the press and the zero return member 5 is returned to the return operation. Before the display wheels 4 and the pinion 12 are engaged with each other, the display wheels 4 rotatably inserted in the support shaft 2 may be deviated due to vibration or the like and may be displaced from a predetermined meshing position.
Alternatively, the pressing lever 11 provided on the zeroing member 5 is
When the cam 3 is not pushed completely without fail, as shown in FIG.
When the short teeth 14 of the pinion 12 enter the position of the valley portion 9 between the pinion 12 and the pinion 12 that is displaced due to the rotation of the drive transmission gear 16, the pinion 12 rotates,
The long teeth 15 positioned on both sides of the short teeth 14 abut on the peripheral surface of the engagement receiving portion 10, respectively, and the pinion 12 is held in the non-rotating state, so that the pinion 12 is locked, and the rotation on the drive source side is driven. If it is transmitted to the transmission gear 16, there is an inconvenience that a load is applied to the tooth tips of the drive transmission gear 16 and the display wheel 4 or the tooth tips of the pinion 12.

Therefore, the present invention has been made in view of the above-mentioned problems, and locks the lock state due to the displacement of the engagement between the display wheel and the pinion without adding the number of parts to the constituent elements of the counter. An object is to provide a reset counter that can be eliminated.

[0010]

In order to achieve the above-mentioned object, the present invention rotatably inserts a plurality of display wheels each having a heart cam on a support shaft erected on a frame. The frame is configured to rotatably support the zeroing member with the base side of the zeroing member as a rotation base point, continuous teeth are provided on the lower digit side of each display wheel, and two teeth are intermittently provided on the upper digit side. Teeth and engagement receiving portions formed on the entire circumference except for the valleys between the intermittent teeth are provided, and the zero-return member integrally presses the heart cams of the respective display wheels from the base portion. A plurality of pinions that move are formed, and a plurality of pinions that are located between the respective display wheels and that carry out the carry operation from the display wheel on the lower girder side to the display wheel on the upper girder side are rotated to the zeroing member. This pinion supports an even number of teeth and the teeth on the lower digit side of the pinion Alternately provided with short teeth formed by notching every other height corresponding to the height and width of the engagement receiving portion and long teeth formed by directly extending the thickness of the engagement receiving portion in the axial direction. When the zeroing member is rotated, the engagement between the pinion and the display wheel is released, and the heart cam of the display wheel is pressed and rotated by the pressing lever of the zeroing member to perform the zeroing alignment. In the reset counter, the intermittent tooth located on the downstream side with respect to the forward rotation of the display wheel, or the continuous tooth portion arranged on the same axis as the intermittent tooth, has a tooth tip A reset counter is characterized in that a pinion guide portion is provided by obliquely notching downstream from the height toward the tooth bottom. In addition, the intermittent tooth positioned downstream with respect to the forward rotation of the display wheel and the continuous tooth portion arranged on the same axis as the intermittent tooth are downstream from the tooth height of the tip toward the tooth bottom. This is because a pinion guide portion is provided by obliquely notching the side. Further, a square boss portion is provided on a side surface portion of each pinion, and an elastic member that presses one surface of the square boss portion to suppress delusion of each pinion is provided on the zero-reset member.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION When the zeroing member is rotated, the engagement between the pinion and the display wheel is released, and the heart cam of the display wheel is pressed and rotated by the pressing lever of the zeroing member. In the reset counter configured to perform zero-return alignment, an intermittent tooth located on the downstream side with respect to the forward rotation of the display wheel, or a continuous tooth portion arranged on the same axis as the intermittent tooth, has the tooth. Since the pinion guide portion is provided by obliquely notching downstream from the tooth height toward the tooth bottom, the heart cam of the display wheel is pushed and rotated by the pushing lever of the zeroing member to return. Even if the display wheel is deviated due to slight vibrations during zero alignment, the pinion guide portion provided by obliquely cutting downstream from the tooth height of the tooth tip toward the tooth bottom to return the rotation of the pinion. When meshing with the indicator wheel associated with The short teeth of the pinion are guided obliquely along the slope of the pinion guide part, that is, from the tooth height of the tooth tip toward the tooth bottom toward the downstream side, and the intermittent tooth located on the downstream side with respect to the forward rotation of the display wheel. The short teeth of the pinion fall immediately rearward of the pinion, thereby avoiding the locked state between the display wheels and the pinion during the zero-return alignment.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings by taking a reset counter for integrating and displaying the traveling distance of an automobile or the like as an example. 1 to 6 show a first embodiment of the present invention, in which a support shaft 2 for a display wheel is installed in parallel between frames 1 forming a part of an indicating instrument. ,
A number is displayed on the outer peripheral surface, and a plurality of display wheels 4 each having a heart cam 3 provided on the side surface are rotatably inserted and supported, and the frame 1 is made of a synthetic resin material. The zero-return member 5 is rotatably supported with the shaft portion 6 which is the base side of the member 5 as a rotation base point, and the continuous teeth 7 are provided on the lower digit side of each of the display wheels 4 and two teeth are provided on the upper digit side. Intermittent teeth 8
And an engagement receiving portion 10 formed on the entire circumference except for the valley portion 9 between the intermittent teeth 8, and the zero-returning member 5 is integrally formed from the base side thereof with the respective harbors of the respective display wheels 4. A plurality of pressing levers 11 for pressing and rotating the cams 3 are integrally formed, and are located between the display wheels 4 and are located on the lower digit side.
To a display wheel 4 on the upper digit side, a plurality of pinions 12 are pivotally supported on a pinion support shaft 13 provided on the zeroing member 5, and the pinion 12 has an even number of teeth. As a short tooth 14 formed by notching the height of the engagement receiving portion 10 and the width thereof every other tooth width on the lower girder side of the pinion 12, and the thickness of the engagement receiving portion 10 as an axis line. The long teeth 15 formed by directly extending in the direction are alternately provided, and the continuous teeth 7 and the pinion 12 of the display wheel 4 located on the upper digit side of the pinion 12 always mesh with each other, and the pinion 12
With respect to the display wheel 4 located on the lower digit side, the short teeth 14 of the pinion 12 are located along the side wall portion of the engagement receiving portion 10 of the display wheel 4, and the long teeth 15 on both sides thereof are engaged and received. Part 10
The pinion 12 abuts against the peripheral surface of the pinion 12 and is supported to prevent rotation, and maintains the meshed state between each pinion 12 and each display wheel 4.

A drive transmission gear 16 for transmitting the rotation from the drive source side is disposed on the lower digit side of the lowest digit display wheel 4 as described in the conventional example. Is configured to be transmitted to the display wheel 4 of the lowest digit through the intermediate gear 17 rotatably inserted in the pinion support shaft 13, and the display wheel 4 of the lowest digit is rotated. Then, the intermittent teeth 8 of the display wheel 4 hit the short teeth 14 of the pinion 12, the pinion 12 rotates together with the display wheel 4, and the long teeth 15 of the pinion 12 fall into the valley 9 between the intermittent teeth 8 and rotate further. At the same time as the next short tooth 14 is guided to the wall surface portion of the engagement receiving portion 10, the long tooth 15
Is disengaged from the valley 9 and the long teeth 15 of the pinion 12 again come into contact with the peripheral surface of the engagement receiving portion 10 to return to the initial state, and the rotation of the pinion 12 causes the display wheel 4 of the upper digit to move by one character. Only the carry-up operation is performed, and in this manner, the display wheel 4 of the lower digit is sequentially moved from the display wheel 4 of the lower digit to the pinion 12.
Is configured to be added and displayed via.

A crank-shaped arm 18 for rotating the zeroing member 5 is integrally formed at one end of the shaft portion 6 which is the base portion of the zeroing member 5, and is formed in this arm. Mu 18
Is fitted and connected to a pressing piece 22 of an operating shaft 21 which is provided to be able to press and return to a bracket 19 formed on the frame 1 side via a coil spring 20, and is connected to the operating shaft 21. The inserted coil spring 20 urges the pressing piece 22 upward, and by this urging force, the coil spring 20 is assembled to the zeroing member 5 via the crank-shaped arm 18 fitted and connected to the pressing piece 22. The attached pinion 12 is urged in a direction in which it meshes with the display wheel 4.

Further, a square boss portion 23 is integrally formed on a side surface portion of each pinion 12, and a plate-like elastic member 24 for pressing one surface of the square boss portion 23 is provided integrally with the zeroing member 5. Even when the pinion 12 is disengaged from the display wheel 4 during the zero-return operation, the elastic member 24 presses one surface of each of the square bosses 23 to maintain the pinion 12 at a predetermined position and suppress delusion. The elastic member 24 that presses one surface of the square boss portion 23 also suppresses the amount of backlash due to the meshing between the display wheel 4 and the pinion 12, so that the delusion of each pinion 12 is suppressed and the display wheel 4 of the display wheel 4 is suppressed. I try to align the numbers

Further, in the first embodiment of the present invention, each indicator wheel 4 has a tooth bottom from a tooth height position of the tip of the intermittent tooth 8 located on the downstream side with respect to the forward rotation of the indicator wheel 4. The pinion guide portion 25 is formed by obliquely notching toward the position on the downstream side.

In the reset counter having the above structure, when the drive transmission gear 16 rotates in the normal forward direction, that is, in the adding direction, the display wheel 4 of the lowest digit rotates via the intermediate gear 17, and this rotation operation is performed. Accordingly, the intermittent teeth 8 of the lowest-order digit display wheel 4 mesh with the short teeth 14 of the pinion 12 every one rotation of the lowest-order digit display wheel 4, and the long teeth 15 of the pinion 12 then intermittently tooth the lowest-order digit display wheel 4. It falls into the valley 9 between 8 and further rotates to move the next short tooth 14 to the lowest digit display wheel 4.
Of the long tooth 1 while being guided to the wall surface portion of the engagement receiving portion 10 of
5 disengages from the valley portion 9 and the long teeth 15 of the pinion 12 again come into contact with the peripheral surface of the engagement receiving portion 10 to return to the initial meshed state, and the rotation operation of the pinion 12 causes the lowest digit display wheel 4 to rotate. The display wheel 4 of the next digit is operated to carry up by one character. Thus, the display wheel 4 of the upper digit is sequentially transmitted through the pinion 12 for each rotation of the display wheel 4 of the lower digit. To be done.

When the drive transmission gear 16 rotates in the subtraction direction, the lowest digit display wheel 4 is reversely rotated through the intermediate gear 17, and with this reverse rotation operation, the next digit of the lowest digit display wheel 4 is rotated. In the short tooth 14 portion of the pinion 12 that meshes with the continuous tooth 7 portion of the display wheel 4 of FIG.
At this time, a part of the intermittent tooth is partially abutted on the intermittent tooth 8 by the pinion guide portion 25 formed by obliquely cutting downstream from the tooth height position of the tooth tip toward the tooth bottom position. The short tooth 14 of the pinion 12, though it is missing
The meshing between the part and the intermittent tooth 8 is transmitted without any hindrance, whereby the lowest digit display wheel 4 is reversely operated and the intermittent tooth 8 pushes the short tooth 14 of the pinion 12 to rotate the pinion 12. The long tooth 15 of 12 falls into the valley 9 between the intermittent teeth 8 of the lowest digit display wheel 4 and further rotates, so that the next short tooth 14 comes to the wall portion of the engagement receiving portion 10 of the lowest digit display wheel 4. At the same time as being guided, the long teeth 15 are disengaged from the troughs 9 and the long teeth 15 of the pinion 12 again come into contact with the peripheral surface of the engagement receiving portion 10 to return to the first meshed state, and by this rotation operation of the pinion 12. The display wheel 4 of the next digit of the lowest digit display wheel 4 is lowered by one character without any trouble.

When the display wheels 4 are zero-aligned,
When the operating shaft 21 is pressed against the urging force of the coil spring 20, the zero-reset member 5 rotates via the crank-shaped arm 18, whereby each pinion 12 causes the continuous teeth 7 of the display wheel 4 and the like. It is disengaged from the intermittent tooth 8 and at the same time, each pressing lever-1
1 is pressed against the heart cam 3 so that the respective display wheels 4 are aligned to zero at once, and when the pressing force of the operating shaft 21 is released thereafter, the zeroing member 5 is restored by the restoring force of the coil spring 20,
The long teeth 15 and the short teeth 14 of each pinion 12 are made to return to the position where they mesh with the continuous teeth 7 and the engagement receiving portion 10 of each display wheel 4, and at this time, the pinion 12 causes the display wheel 4 to move at the time of zeroing operation. Even if they are separated from each other, the elastic member 24 presses and regulates one surface of each of the square boss portions 23, so that the pinion 12 can be maintained at a predetermined position and delusion can be suppressed, and the operation shaft 21 can be pressed. Before the display wheels 4 and the pinions 12 engage with each other in the process of releasing and returning the zero-reset member 5, the display wheels 4 rotatably inserted into the support shaft 2 are deviated due to vibration or the like to cause a predetermined movement. Even if the tooth lever 3 is slightly displaced from the meshing position, or even if the pressing lever 11 provided on the zero-reset member 5 does not push the heart cam 3 securely, as shown in FIG. Tooth height ahead The pinion guide portion 25 provided by cutting obliquely to the downstream side toward the tooth bottom, the pinion 1
When the short tooth 14 of the pinion 12 is engaged with the display wheel 4 accompanying the return of the rotation of 2, the slant surface of the pinion guide portion 25, that is, the short tooth 14 is guided obliquely downstream from the tooth height of the tooth tip toward the tooth bottom. As shown in FIG. 6, the short tooth 14 of the pinion 12 falls immediately behind the intermittent tooth 8 located on the downstream side with respect to the forward rotation of the display wheel 4, which causes each display at the time of zero return alignment. It is possible to avoid the locked state of the wheel 4 and the pinion 12.

FIG. 7 shows a second embodiment of the present invention. In this embodiment, each display wheel 4 has a display wheel 4
In the continuous tooth 7 portion arranged on the same axis as the intermittent tooth 8 located on the downstream side with respect to the rotation in the forward direction, the tip of the tooth is inclined toward the downstream side from the tooth height position to the tooth bottom position. The pinion guide part 25 is formed by cutting out.

In the reset counter having the above-mentioned structure, when the display wheels 4 are aligned for zero return, the pinion 12 is moved by the pinion 12 at the time of zero return operation in the same manner as the first embodiment.
Even if they are separated from each other, the elastic member 24 presses and regulates one surface of each of the square boss portions 23, so that the pinion 12 can be maintained at a predetermined position and delusion can be suppressed, and the operation shaft 21 can be pressed. Before the display wheels 4 and the pinions 12 engage with each other in the process of releasing and returning the zero-reset member 5, the display wheels 4 rotatably inserted into the support shaft 2 are deviated due to vibration or the like to cause a predetermined movement. Even if the position is slightly deviated from the meshing position, or even if the pressing lever 11 provided on the zero-reset member 5 does not push the heart cam 3 securely, the display wheel 4 is rotated in the forward direction. On the other hand, the pinion guide provided on the portion of the continuous tooth 7 arranged on the same axis as the intermittent tooth 8 located on the downstream side, is cut out obliquely downstream from the tooth height of the tooth tip toward the tooth bottom. By part 25 When the pinion 12 meshes with the display wheel 4 when the pinion 12 returns to its rotation, the short teeth 14 of the pinion 12 are guided along the slope of the pinion guide portion 25, that is, from the tooth height of the tooth tip toward the tooth bottom and obliquely toward the downstream side. As a result, the short teeth 14 of the pinion 12 fall immediately behind the intermittent tooth 8 located on the downstream side with respect to the forward rotation of the display wheel 4, and thereby the respective display wheels 4 and the pinion 12 at the time of zero-realignment alignment. The lock state of can be avoided.

Although not shown, the intermittent tooth 8 located on the downstream side with respect to the forward rotation of the display wheel 4 and the intermittent tooth 8 thereof.
Similar to the above-described embodiment, the pinion guide portions 25, which are diagonally cut away from the tooth height of the tooth tip toward the tooth bottom on the downstream side, are provided in the continuous teeth 7 portion arranged on the same axis line as In this case, the inclination angle of the pinion guide portion 25, the notch size, and the like may be set appropriately.

In each of the embodiments described above, the pinion 1
The elastic member 24 that presses and urges the second square boss portion 23 is made of a synthetic resin material integrally with the zero-reset member 5, but may be formed of a flat spring material.
It may be molded separately from synthetic resin or may be formed of a flat spring material, and the angular boss portion is formed in accordance with the number of continuous teeth 7 of the display wheel 4 or the number of pinion 12. The shape and size of 23 may be set.

[0024]

According to the present invention, a plurality of display wheels, each having a heart cam, are rotatably inserted through a support shaft mounted on the frame, and the zeroing member is provided on the frame. The zeroing member is rotatably supported with the base side of the above as a rotation base point, continuous teeth are provided on the lower girder side of each of the display wheels, and two intermittent teeth are provided on the upper girder side, and between these intermittent teeth. An engaging receiving portion formed on the entire circumference excluding the valley portion is provided, and the zeroing member is provided with a plurality of pressing levers that integrally press and rotate the heart cams of the respective display wheels from the base portion. A plurality of pinions that are formed between the display wheels on the lower girder side and are operated between the display wheels on the lower girder side to the display wheels on the upper girder side are pivotally supported by the zeroing member. Is an even number of teeth, and the height of the engagement receiving portion is set every other tooth width on the lower digit side of the pinion. And short teeth formed by notching the width thereof and long teeth formed by extending the thickness of the engagement receiving portion as they are in the axial direction are alternately provided, and the pinion is rotated when the zeroing member is rotated. In the reset counter, in which the engagement between the display wheel and the display wheel is released, and the heart cam of the display wheel is pressed and rotated by the pressing lever of the zero-return member to perform the zero-return alignment. The intermittent tooth located on the downstream side with respect to the direction rotation, or the continuous tooth portion arranged on the same axis as the intermittent tooth, is obliquely cut downstream from the tooth height of the tooth tip toward the tooth bottom. By providing the pinion guide portion, the heart wheel of the display wheel is pressed and rotated by the pressing lever of the zero-return member to perform zero-realignment, and the display wheel may be deviated due to some vibration or the like. Also, from the tooth height of the tooth tip, By the pinion guide portion that is obliquely cut out on the downstream side toward the direction of the pinion, the short teeth of the pinion are engaged on the slope of the pinion guide portion during meshing with the display wheel due to the return of rotation of the pinion, i.e. Guided diagonally toward the bottom toward the downstream side, the short teeth of the pinion will fall immediately behind the intermittent teeth located on the downstream side with respect to the forward rotation of the display wheel, which will cause It is possible to avoid the locked state of each display wheel and the pinion in the above, and in addition to the pinion guide portion, a square boss portion is provided on the side surface portion of each pinion, and one surface of the square boss portion is pressed. By providing an elastic member for suppressing delusion of each pinion on the zeroing member, even if the pinion is separated from the display wheel at the time of zeroing operation of each display wheel, one surface of each angular boss portion is Bullet There is an effect that the pinion can be stably fed into the pinion guide portion by maintaining the pinion at a predetermined position without delusion by restricting the pressure by the elastic member, and the conventional configuration. There is also an effect that the reset counter mechanism can be formed without adding new parts to the element parts.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a reset counter showing the entire structure of a first embodiment of the present invention.

FIG. 2 is a perspective view of a display wheel showing a main part structure of a reset counter of the embodiment.

FIG. 3 is a perspective view of an essential part showing a zeroing member of the embodiment.

FIG. 4 is a perspective view showing a main part of a zeroing member according to the embodiment.

FIG. 5 is an operation diagram showing an initial state of meshing between the intermittent teeth of the display wheel and the pinion at the time of returning to the zero-return alignment operation in the embodiment.

FIG. 6 is an operation diagram showing a meshing state of the intermittent teeth of the display wheel and the short teeth of the pinion during the zero-return alignment operation of the embodiment.

FIG. 7 is a perspective view of an essential part showing the display wheel structure of the first embodiment of the present invention.

FIG. 8 is an exploded perspective view showing a conventional example device of a reset counter mechanism.

9 is a side view showing an assembled state of the reset counter mechanism in FIG.

FIG. 10 is a partial side view showing a main part of the reset counter mechanism in FIG.

FIG. 11 is an operation diagram showing a normal meshing state between the intermittent teeth of the display wheel of the reset counter mechanism and the pinion.

FIG. 12 is an operation diagram showing a disengaged state between the intermittent teeth of the display wheel and the short teeth of the pinion when the zeroing member is operated by the conventional device.

13 is an operation diagram showing a normal meshing state between the intermittent teeth of the display wheel and the short teeth of the pinion when the reset counter mechanism of FIG.

14 is an operation diagram showing an abnormal meshing state between the intermittent teeth of the display wheel and the short teeth of the pinion when the reset counter mechanism of FIG.

[Explanation of symbols]

 1 Frame 2 Support Shaft 3 Heart Cam 4 Display Wheel 5 Zero-Reset Member 7 Continuous Tooth 8 Intermittent Tooth 9 Valley 10 Engagement Receiver 11 Push Lever 12 Pinion 13 Pinion Support Shaft 14 Short Tooth 15 Long Tooth 23 Square Boss part 24 Elastic member 25 Pinion guide part

Claims (3)

[Claims] 1. A plurality of display wheels, each having a heart cam, are rotatably inserted into a support shaft erected on the frame, and the base side of the zeroing member is rotated on the frame. The zeroing member is rotatably supported as a base point, continuous teeth are provided on the lower girder side of each of the display wheels, and two teeth are intermittently provided on the upper girder side and all but the troughs between the intermittent teeth are provided. An engaging receiving portion formed on the periphery is provided, and the zeroing member is formed with a plurality of pressing levers for integrally pressing and rotating the heart cams of the respective display wheels from the base portion. A plurality of pinions that are located between the display wheels and that carry up from the display wheel on the lower girder side to the display wheel on the upper girder side are rotatably supported by the zero-return member. As an even number, every other tooth width on the lower girder side of the pinion is the height of the engagement receiving portion and its width. Short teeth formed by notches and long teeth formed by extending the thickness of the engagement receiving portion as they are in the axial direction are provided alternately, and the pinion and the display wheel when the zeroing member is rotated. In the reset counter, in which the engagement of the display wheel is released and the heart cam of the display wheel is pressed and rotated by the pressing lever of the zero-return member to perform zero-return alignment, the forward rotation of the display wheel is prevented. The intermittent tooth located on the downstream side or the continuous tooth portion arranged on the same axis as the intermittent tooth is notched obliquely downstream from the tooth height of the tooth tip toward the tooth bottom, and the pinion guide portion. A reset counter characterized by being provided with. 2. An intermittent tooth located on the downstream side with respect to the forward rotation of the display wheel and the continuous tooth portion arranged on the same axis as the intermittent tooth, from the tooth height of the tooth tip to the tooth bottom. 2. The reset counter according to claim 1, wherein a pinion guide portion is provided by obliquely notching toward the downstream side of the reset counter. 3. A square boss portion is provided on a side surface portion of each pinion, and an elastic member that presses one surface of the square boss portion to suppress delusion of each pinion is provided on the zeroing member. The reset counter according to claim 1 or 2.