JPH03286281A - total counter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a total counter used in a travel distance meter of an automobile, a counter of a tape recorder, etc., and particularly relates to a motor-driven total counter.

[Conventional technology]

In conventional counters of this kind, for example, in the case of an outer pinion type, two support shafts are installed horizontally in parallel between the left and right side plates of the frame, and a plurality of display wheels are freely rotatably supported on one of the support shafts. A pinion for digit feeding is provided on the other support shaft between each display ring, and a step motor is mounted and fixed on the outside of the lower digit side of the frame, and the rotation of the rotor shaft of this step motor is controlled by the frame. The rotation is transmitted to a pinion for transmitting rotation through a plurality of transmission gears that are pivotally supported in Drives a motor, sequentially transmits the rotation of this step motor from multiple transmission gears and rotation transmission pinions to the lowest digit display wheel,
Furthermore, each display wheel is sequentially shifted and rotated from the lower digit side to the higher digit side via a shift pinion.

However, such a counter has problems in that it is large because the step motor is attached to the outside of the frame, and the structure is complicated because a plurality of transmission gears are pivotally supported on the frame.

As a solution to this problem, Utility Model Application No. 58446
No. 70 proposes an operating time meter. In this system, a step motor is held on a support shaft that supports multiple display shafts so that they can freely rotate, and this step motor is placed between the lowest digit display wheel and the frame. By transmitting the rotation of the rotor shaft to the lowest digit display wheel via a plurality of transmission gears, the step motor can be arranged relatively compactly inside the frame.

[Problem to be solved by the invention]

In the above conventional technology, although the step motor can be arranged coaxially with the display wheel, since the display shaft is arranged coaxially with the step motor, a mounting space with a width in the axial direction is required, and as a result, the counter The problem is that the overall length is long in the axial direction, making it difficult to achieve sufficient miniaturization.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a total counter that can be downsized and simplified in structure.

[Means to solve the problem]

In the total counter of the present invention, the motor is fixed to a frame so that the rotor shaft is installed horizontally, and the rotor shaft is rotatably supported by the frame, and the motor is rotatably supported by the frame, and the rotor shaft is used as a central axis through a pinion for digit feeding. A plurality of display wheels are provided so as to be freely rotatable, and the lowest digit display wheel is fixed to the rotor shaft, and a storage recess is provided on the outer side of the lowest digit display wheel or the highest digit display wheel. A part of the motor is housed in this housing recess, and a lead wire extraction portion of the motor is located outside of the housing recess.

[Effect]

With the above configuration, the rotation of the rotor shaft of the motor is transmitted to the lowest digit display wheel, and each display wheel is sequentially rotated from the lowest digit display wheel via the digit feed pinion. In addition, since a part of the motor is stored in the storage recess of the display wheel, the installation space for the motor is relatively small in the axial direction, and the motor lead wire extraction part is located outside of the storage recess, so there is no space inside the storage recess. This eliminates the need for storage space for the lead wire pull-out portion, and the storage recess can be made smaller accordingly.

〔Example〕

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

1 and 2 show a first embodiment of the present invention. In the figures, 1 is a frame formed in a U-shape, and a rotor shaft 3 is mounted on the inner surface of a left side plate 2 of this frame 1. A pedestal 5 of a step motor 4 is mounted and fixed with screws 6 so as to be installed horizontally. The rotor shaft 3 extends to the right side plate 2A of the frame 1, and its shaft end is rotatably supported by the right side plate 2A via a bearing 7. 8,8A,8
B is a plurality of display wheels made of synthetic resin or the like on which numbers "0 to 9" are displayed, and these are arranged in parallel with the rotor shaft 3 as the central axis. The rotor shaft 3 is press-fitted into the center hole 9 of the lowest digit display shaft 8A, so that the lowest digit display wheel 8A rotates integrally with the rotor shaft 3.

In addition, each display axis 8 from the second digit to the highest digit to one lower digit
is supported so as to be freely rotatable around the rotor shaft 3.

Further, on the outer side of the highest digit display wheel 8B, that is, on the side of the highest digit, there is a cylindrical storage recess 10 centered around the rotor shaft 3.
Approximately 1/3 of the front side of the step motor 4 is housed in this housing recess 10 via a cylindrical spacer 11 made of synthetic resin or the like. In this case, the rotor shaft 3 is loosely inserted into the center of the spacer 11 and the highest digit display wheel 8B. And the most significant digit display wheel 8
B is rotatably supported by a spacer 11 externally mounted on the step motor 4. In addition, the step motor 4
A lead wire pull-out portion 12 is provided on the outer circumferential side of the housing at a position outside the storage recess IO, and this lead wire 13 is electrically connected to a motor drive circuit (not shown). Also, continuous teeth 14 are provided on the lower digit side periphery of each display ring 8, 8A, 8B.
are formed, and intermittent teeth 15 are formed on the upper digit side.

Further, a support shaft 16 is horizontally fixed in parallel to the rotor shaft 3 between the left and right side plates 2.2A of the frame 1, located outside the display wheels 8.8A and 8B. A pinion 17 for shifting is positioned between each of the display shafts 8.8A and 8B and is freely rotatably supported. Also each pinion 1
Long teeth 18 and short teeth 19 are formed alternately on 7, and the long teeth 18 mesh with the continuous teeth 14 and intermittent teeth 15 of the indicator wheels 8 and 8A, and the short teeth 19 mesh with the continuous teeth 14 of the indicator wheels 8 and 8B. The well-known technology is used to shift the digits.

When the step motor 4 is driven via the drive circuit based on the mileage signal from the control unit, the lowest digit display wheel 8A rotates integrally with the rotor shaft 3, and the lowest digit display wheel 8A rotates. is transmitted to the upper digits in order through the shift pinion 17.

In this way, in the above embodiment, the highest digit display wheel 8B
The step motor 4 is installed in the storage recess 10 formed on the outer side of the
For example, approximately 1/3 of the front side is accommodated, so the width of the installation space for the step motor 4 is the highest digit display wheel 8B.
The length between the counter and the left side plate 2 of the frame 1 is about one six wheels, so the length in the axial direction of the counter can be reduced, and miniaturization can be achieved. Furthermore, since the lead wire pull-out portion 12 of the step motor 4 is located outside the storage recess 10, the diameter of the storage recess 10 that occurs when the lead wire pull-out portion 12 is located within the storage recess 10 is increased. Problems associated with the strength of the display wheel 8B or the problem of downsizing the step motor 4 can be avoided. Furthermore, the rotor shaft 3 of the step motor 4 is fixed to the lowest digit display wheel 8 so that both rotate integrally, so that the rotation of the rotor shaft 3 is transmitted to the lowest digit display wheel 8A. The transmission gear group can be omitted and the structure can be simplified. In this case, the drive circuit may be constructed so that the rotation speed of the rotor shaft 3 becomes a desired low speed rotation, if necessary. Also, step motor 4
can be directly attached to the frame 1, so if the frame 1 is made of metal, the motor has an excellent heat dissipation effect.

FIG. 3 shows a second embodiment of the present invention. The same parts as those in the first embodiment are given the same reference numerals and explanations are omitted. In this example, the pedestal 5 of the step motor 4 is attached to the frame 1. The step motor 40 is fixedly attached to the inner surface of the right side plate 2A, and a step motor 40 and a rotor shaft 3 (not shown) are rotatably supported on the left side plate 2, and this rotor shaft 3 and the lowest digit display wheel 8A are connected to the first embodiment. The other indicator wheels are similarly fixed and rotatably supported on the rotor shaft 3. Further, a storage recess 10 is formed on the outer side of the lowest digit display wheel 8A, that is, on the side of the lower digit, and a part of the step motor 4, for example, approximately half of the front side, is stored in the storage recess 10 via a spacer 11. and the lead wire pull-out portion 12 is located outside the storage recess 10.
As in the first embodiment, the lowest digit display wheel 8A rotates integrally with the rotor shaft 3, and is sequentially transmitted to the higher digits by the pinion 17, and the lowest digit display wheel 8A is externally mounted on the step motor 4. Rotate along the outer surface of the spacer 11. Also in this embodiment, the size can be reduced and the structure can be simplified as in the first embodiment.

Note that the present invention is not limited to the above-mentioned embodiments, and various modifications can be made within the scope of the gist of the present invention. For example, the type of motor may be selected as appropriate, and although the rotor shaft is shown as a single rotor shaft, two rotor shafts may be connected. Further, although the outer pinion type counter has been described, it can also be applied to a well-known inner pinion type counter in which a holder having a pinion for digit feeding is pivotally supported is interposed between each display wheel.

Alternatively, the rotation of the lowest digit display wheel may be transmitted to the reset counter via a transmission gear. Further, although the case is shown in which about ⅓ of the motor is housed in the housing recess, the range to be housed may be selected as appropriate.

〔Effect of the invention〕

In the present invention, the motor is fixed to a frame so that the rotor shaft is installed horizontally, and the rotor shaft is rotatably supported by the frame, and the rotor shaft is set as a center axis and the motor is sequentially moved through a pinion for shifting. A plurality of display wheels are provided so as to be freely rotatable, and a lowest digit display wheel is fixed to the rotor shaft, and a storage recess is formed on the outer side of the lowest digit display wheel or the highest digit display wheel. A part of the motor is housed in the housing recess, and the motor lead wire extraction part is located outside of the housing recess, thereby providing a total counter that can be downsized and simplified in structure. Can be provided.

[Brief explanation of drawings]

FIG. 3 is a diagram of the present invention. It is. 1.-frame 4.--.-step motor l〇-Storage recess 17- Binion Cross-sectional view of main parts showing 2nd embodiment ３・～・Rotor shaft 8.8A, 8B --- Display wheel 12--Lead wire pull-out part

Claims (1)

[Claims] (1) The motor is fixed to a frame so that the rotor shaft is installed horizontally, and the rotor shaft is rotatably supported by the frame, and the rotor shaft is set as a center axis and the motor is sequentially moved through a pinion for shifting. A plurality of display wheels are provided so as to be freely rotatable, and a lowest digit display wheel is fixed to the rotor shaft, and a storage recess is formed on the outer side of the lowest digit display wheel or the highest digit display wheel. A total counter, characterized in that a part of the motor is housed in the housing recess, and a lead wire extraction part of the motor is located outside of the housing recess.