JP2536659B2 - Reset counter - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reset counter, and more particularly to the structure of a zero-reset member in a reset counter such as a vehicle travel distance meter and a tape recorder counter.

[Prior Art] As is known in Japanese Utility Model Laid-Open No. 59-155660, a conventional device of this type has a plurality of display wheels 2 on a frame 1 as shown in FIGS. Are rotatably supported by shafts 3, respectively, and continuous teeth 4 are integrally formed on the lower side surface of each display wheel 2, and intermittent teeth 5 and a heart cam 6 are integrally formed on the upper side surface thereof. . The shaft 3 is attached to the frame 1.
A support shaft 7 which is a first shaft is rotatably provided in parallel with the support shaft 7, and a key groove 8 is provided on the support shaft 7 over the entire length.
A zeroing member 9 is integrally provided on the rear side of the zeroing member 9 with a key 9A, a plurality of pressing levers 10 for pressing the heart cam 6 are formed on one side of the zeroing member 9, and the continuous teeth 4 and Intermittent tooth 5
A plurality of pinion gears 11 meshing with and rotating each display wheel 2 from the lower digit to the upper digit are rotatably supported by a pinion shaft 12 which is a second shaft. The shaft support 7
One end side of the is projected from the frame 1, and a cam portion 14 is integrally provided on the projected shaft end through a key 13.
A spring 15 is wound around a cylindrical boss portion 14A provided on the cam portion 14, one end of the spring 15 is locked to the frame 1 and the other end thereof is locked to the cam portion 14, and the pinion gear 11 is attached to the cam portion 14 to the display wheel 2. The rotational force in the direction of meshing with the continuous tooth 4 of FIG. A U-shaped frame body 16 is fixed to the frame 1 on the side of the cam portion 14, and the support shaft 7 and the pinion shaft are attached to the frame body 16.
A guide shaft 17 is inserted and fixed orthogonally to 12, and a pressing piece 18 integrated with the operating shaft 17A is slidably provided on the guide shaft 17 in the frame body 16 and the pressing piece 18 is not returned. A spring 19 for urging the zero position is wound.

Then, to align the display wheels 2 to zero, the operation shaft 17A
Is pressed against the bias of the spring 19,
18 presses the cam portion 14 and the cam portion 14 rotates against the bias of the spring 15, and the zeroing member 9 rotates with the support shaft 7 to which the cam portion 14 is attached as a base point. As shown in FIG. 12, each pinion is disengaged from each tooth portion 4, 5 of the display wheel 2 by the rotation, and at the same time, each pressing lever 10 is brought into pressure contact with the heart cam 6 and each display wheel 2 is pressed.
Are all returned to zero.

By the way, the operating shaft 17A of this type of zeroing device is
The tip is inserted on a display plate (not shown) disposed on the upper part of the display wheel, and the operation shafts are provided on the left side of the plurality of display wheels 2 as in the conventional structure described above in consideration of design or operability. 17A is arranged, but not shown, but each display wheel 2
In some cases, it may be arranged on the right side of the display panel, or may be provided corresponding to the center of the display plate, that is, corresponding to the center side of the plurality of display wheels 2. In this case, as shown in FIG.
It is known that the cam portion 14 is extended to the side of the cam portion 14 provided on the end side of the support shaft 7 and the cam portion 14 is pushed by the pushing portion 18A provided at the tip of the arm portion 20. A moment M acts on the arm portion 20 provided in the shape of a cantilever as shown in FIG. 14 due to the biasing force of the spring 15 provided on the cam portion 14 during the pressing operation,
There is a problem that the upper and lower ends of the shaft hole 20A of the arm portion 20 are pressed against the operating shaft 17B and the smooth pressing operation of the operating shaft 17B cannot be performed. Therefore, as shown in FIG. Cam portions 14 and 14 'are respectively provided on the operation shafts, and arm portions 20 and 20' extending to the respective cam portions 14 and 14 'are provided on the operation shaft 17B.
By providing pressing portions 18A and 18B at the tips of these arm portions 20 and 20 ', the moment M of the arm portion 20 caused by pressing the cam portion 14 provided on only one side of the support shaft 7 can be prevented and operated. The one that enables a smooth pressing operation of the shaft 17B is used.

[Problems to be Solved by the Invention] In the above-mentioned conventional technique, since the operation shaft 17B of the zeroing device is provided corresponding to the center side of the plurality of display wheels 2, the support shaft 7 is provided.
The cam portions 14 and 14 'are provided at both ends of the
Since the arm parts 20 and 20 'for pressing the 4,14' are provided, the number of parts of the zero-return device increases and the assembling workability decreases, and the arm provided outside the frame 1 Part 2
There was a problem that the instrument body was enlarged by 0,20 '.

Therefore, the present invention is capable of arbitrarily setting the location of the operating shaft within a prescribed range, enabling a smooth zero-return operation, and reducing the number of parts, which is an excellent reset workability. The purpose is to provide.

[Means for Solving the Problems] The present invention rotatably inserts a plurality of display wheels each provided with a heart cam on a support shaft erected on a frame, and rotates the base side of the zeroing member on the frame. The zeroing member is rotatably supported as a moving base point, and the zeroing member is formed with a plurality of pressing levers for pressing and rotating the heart cams of the respective display wheels integrally with the base, and the respective display wheels are A plurality of pinion gears which are located between the lower digits and are sequentially operated to carry to the upper digits, are rotatably supported by a zeroing member, and a cam portion is provided on the zeroing member, and the cam portion is pressed. In a reset counter in which a pressing drive unit is provided on the operation shaft, and the display wheel is zero-aligned via the pressing drive unit provided on the operation shaft by the pressing operation of the operation shaft, the zeroing member is combined. Shaped by resin The cam shaft provided in the zeroing member is further integrated with the engaging shaft in parallel with the longitudinal direction of the base of the zeroing member, and at least a part of the engaging shaft and the operation. It is arranged so as to face a pressing drive unit provided on the shaft.

[Operation] By pressing the operation shaft with the above configuration,
A rotation moment acts on the zeroing member from the cam portion side of the zeroing member via an engaging shaft that is integrally provided, and the zeroing member rotates.

Embodiments Embodiments of the present invention will be described below with reference to the accompanying drawings.

1 to 4 show a first embodiment of the present invention.
Is a frame made of synthetic resin or the like in which a totalizer unit and a speedometer unit are assembled, and a pair of side walls 24 to which a total counter 23 is attached and fixed to one side of a base portion 22 having a substantially rectangular shape of the frame 21. The shaft 26 of the total counter 23 is inserted into the bearing portion 25 formed at the upper end of the side wall 24 from above and is caulked and fixed. Further, a pair of side walls 27 are provided on the other side of the base portion 22, and a bearing portion 28 is bored at the upper ends of the side walls 27, and the side wall 27 is formed on the side wall 27. The mounting portion 29 is formed.

After attaching a return member described later to the bearing portion 28 to the frame 21, a shaft 31 having a plurality of display wheels 30 is inserted from above and caulked and fixed, and a plurality of the display wheels is provided through the shafts 31.
Each of the display wheels 30 is rotatably supported, and a continuous tooth 32 is integrally formed on the lower side surface of each display wheel 30, and an intermittent tooth 33 and a heart cam 34 are integrally formed on the upper side surface thereof.

Reference numeral 35 denotes a zeroing member made of synthetic resin, which is attached to the frame 21 in parallel with the axis 31 of the display wheel 30.
A rotating portion 37 and an inserting portion 38 having two parallel planes are formed on both sides of the shaft portion 36 which is the base side of the rotating portion 35, and the rotating portion after inserting the inserting portion 38 into the mounting portion 29. The rotating portion 37 is slid to the 37 side to engage the rotating portion 37 in the mounting portion 29, and the zeroing member 35 is rotatably attached to the frame 21. A central portion of the shaft portion 36 is formed in a frame shape having a substantially U-shaped cross section, a plurality of pressing levers 39 for pressing the heart cam 34 are formed on one side of the shaft portion 36, and the other side thereof is 32 continuous teeth
A plurality of pinion gears 40 that mesh with the intermittent teeth 33 and rotate each display wheel 30 to the lower-order girder by means of a pinion shaft 41 are rotatably supported by the pinion shaft 41. Part 36
It is fixed to the zero-return member 35 by penetrating the pinion mounting portion 42 projecting from the. Further, an appropriate number of cam portions 43 are integrally projectingly provided on the zeroing member 35 from the middle of the shaft portion 36 on the base side, and the tip side of each cam portion 43 is bridged to perform zeroing. Member 35
An engaging shaft 44 is integrally formed so as to be parallel to the shaft portion 36 serving as the base portion of the. Further, individually provided cam portions 45 are integrally formed on both end sides of the shaft portion 36, which is the base portion of the zero-return member 35, and are arranged outward from the cam portions 45 in parallel with the shaft portion 36. The engagement shaft 46 is integrally formed.

An operating shaft 48 is inserted into the U-shaped bracket 47 provided corresponding to the position of the engaging shaft 44 so as to be orthogonal to the engaging shaft 44, and a pressing piece serving as a pressing drive unit fixed to the operating shaft 48. A guide shaft 50 into which the engaging shaft 44 is engaged is formed in 49, and a spring 51 provided in the operation shaft 48 is provided with the pressing piece 49.
Is urged upward, and the zeroing member 35 is applied with a rotational force in the direction in which the pinion gear 40 meshes with the display wheel 30 via the engagement shaft 44 engaged with the guide groove 50 of the pressing piece 49. It is energized.

Reference numeral 52 is a gear box accommodating a step motor (not shown). The gear box 52 is fixed to the main body frame 21, and the rotation of the gear 53 provided in the gear box 52 prevents the total counter 23 and the display wheel 30 from rotating. It is configured to be transmitted to the lower digit.

In the figure, 54 is a speedometer fixed in the frame 21, and 55 is a circuit board to which the frame 21 is fixed.

In the above configuration, when the rotational driving force of the gear 53 of the gear box 52 is applied to the display wheel 30 of the lowest digit, the intermittent tooth 33 of one rotation of the display wheel 30 of the lowest digit meshes with the pinion gear 40. This is rotated by one pitch, and the display wheel 30 on the adjacent upper digit side, which is always meshed with the pinion gear 40 and the continuous teeth 32, is carried up by this rotation, and the upper digit is sequentially rotated by repeating this. It is shifted to the side display wheel 30.

Further, when the display wheels 30 are zero-aligned, when the operating shaft 48 is pressed, the pressing piece 49 fixed to the operating shaft 48 descends against the bias of the spring 51, and the guide groove of the pressing piece 49. The engagement shaft 44 located within 50 rotates downward about the shaft portion 36 as a rotation center. This rotation causes each pinion gear to move as shown in FIG.
40 is disengaged from the teeth 32, 33 of the display wheel 30, and at the same time, the pressing levers 39 are pressed against the heart cam 34 so that the display wheels 30 are all zero-aligned. After that, when the pressing force of the operating shaft 48 is released, the operating shaft 48 returns due to the restoring force of the spring 51, and the pressing piece
With the rising of 49, the engagement shaft 44 rotates upward about the shaft portion 36 as a rotation center, and the pinion gear 40 returns to the position where it meshes with the tooth portions 32, 33 of the display wheel.

As described above, in the above embodiment, the zero-return member 35 is formed of synthetic resin, and the zero-return member 35 is provided with the guide groove 50 of the pressing piece 49.
The engaging shaft 44 that engages with the arm portion corresponding to the center side of the display wheel 30.
Since it is integrally projected through 43, the links 14, 14 'are provided on the support shaft of the zeroing member as in the conventional case, and the parts such as the arms 20, 20' for pressing these are not necessary. The number of points can be reduced and the assembling workability can be improved. Further, since the rotary member 37 is integrally formed on the zero-return member 35 so as to be pivotally supported by the frame body 21, the frame can be formed without using a separate component such as the support shaft 7 having the key groove 8 which has been conventionally used. Since it is possible to attach it to 21, the number of parts can be reduced, and the workability of assembling the zero-return member 35 can be further improved.

FIGS. 5 and 6 show a second embodiment of the present invention, in which the same parts as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted. It shows one in which each of the display wheels 30 is zero-aligned by operating the provided engagement shaft 46, and a spring 56 is wound around the cam portion 45 side of the zero-return member 35,
One end of the spring 56 is locked to the frame 21 and the other end is locked to the cam portion 45, so that the pinion gear 40 is attached to the tooth portion of the display wheel 30 on the zeroing member 35.
It applies a rotational force in the direction that meshes with 32, 33.
In this example, the U-shaped bracket 47A is provided corresponding to the position of the engaging shaft 46 on one side, and the pressing piece 49A as a pressing drive portion is located above the engaging shaft 46, and the pressing piece 49A is The guide groove shown in the first embodiment is not provided.

In the above structure, when the operating shaft 48 is pressed, the pressing piece 49A fixed to the operating shaft 48 descends against the bias of the sprinkle 51, and the pressing piece 49A presses the engaging shaft 46, and the engaging shaft Four
6 rotates about the shaft 36 as a rotation center against the bias of the spring 56. By this rotation, each pinion gear 40 is disengaged from each tooth portion 32, 33 of the display wheel 30, and at the same time, each pressing lever 39 is brought into pressure contact with the zero-reset cam 34 so that each display wheel 30 is aligned to zero. Then, when the pressing force of the operating shaft 48A is released, the operating shaft 48A returns due to the restoring force of the spring 51, the engaging shaft 46 rotates upward due to the restoring force of the spring 56, and the pinion gear 40 causes the tooth portions of the display wheel 30 to move. It returns to the position where it meshes with 32, 33.

As described above, in the above embodiment, the zero-return member 35 is made of synthetic resin, and the engagement shaft 46 that engages with the lower side of the pressing piece 49A on the zero-return member 35 is provided with the cam portion 45 on the side of the display wheel 30. Since the projection wheels 30 are integrally projected via the engaging shaft 46, the zeroing member 35 can be rotated through the engaging shaft 46 by the pressing operation of the operating shaft 48A to zero the alignment of the display wheel 30. The same action and effect as those of the embodiment can be obtained.

FIG. 7 shows a third embodiment of the present invention, in which the same parts as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted. Barrel shaft 3
6 are extended on both sides, and cam portions 45A are separately formed integrally on both ends of the extended shaft portion 36. Further, an engaging shaft 44A is formed integrally with the zero-return member 35A by bridging the cam portion 45A and the cam portion 43 protruding from the middle of the shaft portion 36 so as to be parallel to the shaft portion 36. Has been done. Further, the operating shaft 48B is installed so that the pressing piece 49B, which is the pressing drive portion having the same configuration as that of the first embodiment, is positioned on the engaging shaft 44A between the left cam portions 45A and 43, that is, the operating shaft 48B. Is the display wheel 30
It is provided on the right side. Also, in the figure pressing piece 49C,
49D shows another installation example of the operation shafts 48C and 48D.

As described above, in this embodiment, the zeroing member 34A is made of synthetic resin, and the cam portion 45 provided on the zeroing member 35A.
Further provided integrally with A and 43, an engaging shaft 44A is provided in parallel with the longitudinal direction of the shaft portion 36 which is the base portion of the zeroing member 35A, and a part of the engaging shaft 44A and a pressing force provided on the operating shaft 48B. Since the pressing piece 49B, which is a drive section, is disposed so as to face each other, the operation shaft 4
It is possible to perform zero-return alignment via the engaging shaft 44A by pressing the 8B, and the position of the operating shaft can be arbitrarily set within the range of the engaging shaft 44A like the pressing pieces 49C and 49D shown in other installation examples. Can be set, and in this case as well, zero return alignment can be performed, and the same action and effect as in the first embodiment can be obtained.

FIG. 8 shows a fourth embodiment of the present invention, in which the same parts as those of the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted. Cam portions 45 are integrally provided separately on both sides of each of the 36, and the engaging shafts are formed outward from the respective cam portions 45 in parallel with the shaft portion 36 and are integrally engaged with each other.
46A is formed. The engagement shaft 46A is provided closer to the shaft portion 36 side than the axis line position of the engagement shaft 44 provided in the middle of the shaft portion 36 in this example. Therefore, in the case of the pressing operation of the operation shaft 48E set on the left side with respect to the display wheel 30, the inter-axial distance between the shaft portion 36 serving as the rotation support shaft and the engagement shaft 46A provided on the cam portion 45. As a result, the operating axis 4
The stroke due to the pushing movement of the pushing piece 49E provided on the 6A is set small.

On the other hand, the operating shaft set in the middle of the display wheel 30
In the case of the pressing operation of 48, the shaft portion 36 that serves as a rotation support shaft
Since the inter-axis distance between the cam shaft 43 and the engagement shaft 44 provided on the cam portion 43 is set to be far apart by the position of the cam portion 45 described above, the stroke is lengthened by the pushing movement of the pressing piece 49 provided on the operation shaft 48. Is set.

Further, as described above, the stroke can be selected by arbitrarily setting the axial distance between the shaft portion 36 of the zero-return member 35B and the cam portions 43, 45 according to the specifications of the reset counter.

The present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention. For example, the engaging shafts provided integrally with the zero-return member are connected in series. Also, the disposition position of the pressing drive unit with respect to the engagement shaft can be appropriately selected. Further, an arbitrary number of cam portions provided integrally with the zero-return member may be provided, and it may be provided so as to maintain the strength of the engagement shaft depending on the number and the positional relationship. Can be selected as appropriate.

EFFECTS OF THE INVENTION The present invention rotatably inserts a plurality of display wheels each provided with a heart cam on a support shaft installed on a frame, and the base side of the zeroing member is returned to the frame as a rotation base point. The zero member is rotatably supported, and a plurality of pressing levers for pressing and rotating the heart cams of the respective display wheels are integrally formed from the base portion on the zeroing member, and the zero members are positioned between the respective display wheels. Then, a plurality of pinion gears, which carry out a carry operation from the lower digit to the upper digit, are rotatably supported on the zero-return member, and a cam portion is provided on the zero-return member. In a reset counter in which the display wheel is zero-aligned via the pressing drive portion provided on the operation shaft by pressing the operation shaft, the zero-reduction member is made of synthetic resin. With An engaging shaft is provided in parallel with the longitudinal direction of the base portion of the zero-return member, and is further integrated with the cam portion provided on the zero-return member, and is provided on at least a part of the engaging shaft and the operation shaft. Further, the reset counter is provided so as to face the pressing drive section, and the reset counter is capable of performing a smooth zero-return operation, reducing the number of parts, and excellent in workability of assembling.

[Brief description of drawings]

1 to 4 show a first embodiment of the present invention.
The figure is an exploded perspective view, FIG. 2 is a plan view of the main part, FIG. 3, and FIG.
FIG. 5 is a side view showing a working state, FIGS. 5 and 6 show a second embodiment of the present invention, FIG. 5 is a plan view of essential parts, FIG. 6 is a side view showing a working state, and FIG. FIG. 8 is a plan view of an essential part showing a third embodiment, FIG. 8 is a plan view of an essential part showing a fourth embodiment, FIGS. 9 to 12 show a conventional example, FIG. 9 is a front view, First
FIG. 10 is an exploded perspective view, FIGS. 11 and 12 are side views showing the operating state, FIGS. 13 to 15 are other conventional examples, FIG. 13 is a plan view, and FIG. 14 is a main part. Is a front view and FIG. 15 is a plan view. 21 …… Frame 30 …… Display wheel 34 …… Heart cam 35,35A, 35B …… Reset member 39 …… Pressing lever 40 …… Pinion gear 43,45,45A …… Cam section 44,44A …… Engagement shaft 46,46A ...... Engaging shaft 48,48A, 48B, 48C, 48D, 48E ...... Operation shaft 49,49A, 49B, 49C, 49D, 49E ...... Pressing piece (pressing drive section)

Claims (1)

(57) [Claims] 1. A plurality of display wheels, each having a heart cam, are rotatably inserted through a support shaft erected on a frame, and a zeroing member is rotatably mounted on the base of the zeroing member. A plurality of pressing levers that are rotatably supported and that press and rotate the heart cams of the display wheels are integrally formed from the base portion, and the lower digits are located between the display wheels. To a higher digit, the plurality of pinion gears are rotatably supported by a zero-return member, and a cam portion is provided on the zero-return member. In the reset counter in which the display wheel is zero-aligned through the pressing drive portion provided on the operation shaft by the pressing operation of the operation shaft, the zero-reduction member is formed of synthetic resin and Zeroing An engaging shaft is provided in parallel with the longitudinal direction of the base of the zero-reset member, and the pressing drive unit is provided on at least a part of the engaging shaft and the operating shaft. And a counter which is disposed so as to face each other.