JP2572522Y2 - Sensor mechanism in time clock - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a sensor mechanism used in a time recorder to detect various information on an inserted time card and automatically perform a counting operation and the like.

[0002]

2. Description of the Related Art This type of sensor mechanism is disclosed in
As disclosed in Japanese Patent No. 50277, it is used for reading various kinds of information such as a mark of a personal identification code of a card holder and performing automatic processing such as card counting work. Conventionally, this sensor mechanism has a configuration as shown in FIG. That is, the base end of the printed circuit board 6 of the sensor mechanism 5 is screwed to one frame 2 of the guide frames 2 and 3 before and after forming the card guide path 1 for inserting the time card of the time clock via the spacer 7. Then, the reflection type photosensor 8 is mounted on the extending end of the substrate 6 by soldering or the like.
A time card 10 that passes through a card guide path 1 through a window hole 9 formed in the frame 2 with a detection end face 8a of the sensor 8
At the detection position 11.

Then, at the detection position of various information on the time card 10 inserted into the card guide path 1 in the direction of the arrow, an optical detection operation is performed by the reflection type photo sensor 8.

[0004]

However, a problem with the above-described conventional configuration is that it is difficult to accurately and constantly maintain a constant distance G from the detection end face 8a of the sensor 8 to the corresponding face 10a of the card 10. is there. That is, in order to accurately read the information on the card 10 by the reflection type photosensor 8, it is desirable that the interval G is constant. If the interval G fluctuates excessively, the sensor cannot be read, and the reliability of the sensor function is reduced. Sex is impaired. For example, this reading interval G
Is set to 0.6 mm, it has been experimentally confirmed that the reading accuracy is lost if the error exceeds 0.2 mm from the distance. However, since the error of 0.2 mm is extremely small, in the conventional configuration shown in FIG. 5, excessive attention must be paid to the attachment of the sensor to the frame. there were.
In particular, in this conventional configuration, warpage of the substrate 6, variation in the mounting state, variation in the shape of the sensor itself, and the like have been one of the hindrance factors to the improvement in accuracy. Furthermore, the time card itself has a variation in its thickness and fluctuates depending on the running condition on the card guide path, and it is unavoidable that it is difficult to significantly improve the accuracy.

The present invention has been made in view of the above-described problems in the conventional configuration, and its object is to always maintain a constant and accurate reading interval without paying too much attention to the accuracy of the related components of the sensor mechanism. It is an object of the present invention to provide an inexpensive and more reliable sensor mechanism for a time clock with less variation between products in a sensor detection function.

[0006]

In order to achieve the above-mentioned object, the present invention provides a method in which a detection end face of a reflection type photo sensor is spaced from a corresponding face of a time card inserted along a card guide path at a detection position. On the premise that the sensor performs an operation of detecting various types of information on the time card by the sensor, a holder provided with a holder for accommodating the reflective photosensor is provided, and the sensor is provided in the holder of the holder. A contact edge protruding further from the detection end surface of the time card and entering the card guide path at the detection position, and the back surface of the time card inserted into the card guide path at the detection position opposite to the corresponding surface. A receiving portion for contact is provided, an interval between the receiving portion and the abutting edge of the holding portion is set to be equal to or less than the thickness of the time card, and the corresponding abutting edge is set to the time card And abutting a corresponding surface, it is to propose a sensor mechanism for time recorder of maintaining comprising configuration the distance between the corresponding surface and said detection end surface of the reflection type photosensor timecard constant.

In the present invention, the holder is provided with a fixing portion for fixing the holder on the time clock and an elastic portion interposed between the fixing portion and the holding portion. The present invention proposes a configuration for obtaining a pressing force for applying the sensor to the corresponding surface of the time card.Also, as another configuration, an opening is formed in a guide frame that forms a card guide path at the detection position,
A card pressing elastic member having a curved portion that is in contact with the time card inserted into the card guide path through the opening is provided on the back surface opposite to the corresponding surface of the time card, and the time card is pressed by the elastic member. Is proposed to apply the corresponding surface of (1) to the contact edge of the holding portion of the holder.

[0008]

In the detecting operation of the sensor mechanism of the present invention, the contact edge of the holder is always kept in contact with the time card passing through the card guide path, and the contact edge between the corresponding contact edge and the detection end face of the sensor. That is, since the reading interval is constant, the detection can be automatically kept constant by the detection in the applied state. Since the distance between the contact edge and the receiving portion is set to be equal to or less than the thickness of the inserted time card, the contact edge is always applied to the time card. In order to reliably maintain the action of the contact, in the configuration in which the elastic portion and the fixing portion are provided in the holder as described above, the corresponding contact edge is formed by utilizing the spring elasticity of the elastic portion. The card is applied to the corresponding surface with a predetermined spring pressure, and the card is supported by a receiving portion such as a guide frame on the back surface or the back surface, so that the applied state is reliably maintained. Further, as described above, in the configuration in which the opening is formed in the guide frame and the curved portion of the card holding elastic member forming the receiving portion is opposed to the back surface of the card through the opening, the spring elastic member of the elastic member is used. Due to the spring elasticity of the card, the card is pressed toward the contact edge of the holder, so that the contact state between the contact edge and the corresponding surface of the card is reliably maintained.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a first embodiment of the present invention will be described with reference to FIGS. In the figure, reference numerals 12 and 13 denote guide frames before and after a time clock forming a card guide path 14. A card 15 is inserted into the card guide path 14 in the direction of the arrow, and a window hole 16 formed in one frame 12 is provided. The sensor mechanism 18 of the present invention reads various kinds of information such as the identification mark of the card owner displayed on the corresponding surface 15a of the card by printing or the like at the detection position 17 set at the position of "1." Is performed. The detection operation for this is performed by the sensor mechanism 18.

The sensor mechanism 18 of the present invention includes a holder 20.
The holder 20 has a fixing portion 20 a screwed and fixed to the frame 12 with screws 21, a holding portion 20 b for holding the reflection type photosensor 22 in an interior state, and both portions 20.
a and 20b are connected to each other and are formed of an elastic portion 20c having a spring elasticity and formed in an arm shape.

In the first embodiment, the holder 20 is formed by integral molding of plastic. The elastic part 20c obtains spring elasticity by the bend property of the plastic material. The holding portion 20b has a mounting hole 23 for accommodating the sensor 22 therein, and has a rounded front edge facing the time card 15 as an abutting edge 24, which is detected as shown in FIG. At the position 17, it is placed against the time card 15 passing through the card guide path 14. In this state, a receiving portion that supports the card 15 from behind the one guide frame 13 behind it is configured.

The urging force for maintaining the contact edge 24 in the contact state is obtained by the spring elasticity of the elastic portion 20c. When the card 15 is not in the card guide path 14, the contact edge 24 is slightly deeper into the card guide path 14 due to spring elasticity. 1 and is pushed out slightly, so that the corresponding contact edge 24 always maintains the applied state shown in FIG. 1 with a predetermined spring pressure during card running. The urging force of this contact should be set so as not to give an excessive resistance to the free running of the card, but it is not a place that requires strict accuracy. It can be set appropriately in consideration of the above. In any case, the holding portion 20b of the holder 20 is in a state in which the contact end edge 24 enters the card guideway 14 due to the spring elasticity of the elastic portion 20c. If not present, the distance E between the contact edge 24 and the inner wall surface of the guide frame 13 forming the receiving portion is set to be equal to or less than the thickness D of the time card 15 as shown in FIG. With such a setting, when the card 15 is inserted, the card 15 is surely brought into a contact state, and due to a slight running resistance given by the contact, disturbance such as swinging and running too much during card traveling is suppressed,
There is an effect of obtaining a more stable running state. Further, as shown in the drawing, the contact edge 24 is rounded in the card running direction, so that there is no danger of damaging the card surface due to the contact. Further, as shown in FIG. 2, the contact edge 24 is applied to the card 15 by the sensor 22.
, And only the left and right walls 24a are not included, so that there is no possibility that the detection such as abrasion of a mark or the like in the detection area on the card due to collision will be hindered.

The reflection type photosensor 22 is fitted and fixed in the mounting hole 23 of the holding portion 20b, and is electrically connected to the wiring 26 on a substrate 25 adhesively fixed to the rear end of the holding portion 20b. The detection end face 22a of the sensor is positioned so as to be drawn into the mounting hole 23 by a distance G from the most protruding position of the contact edge 24 of the holding portion 20b. That is, this interval G is the reading interval of the sensor at the time of detection. Therefore, regardless of the running state of the card 15, the detection can always be performed at a constant interval G, and an accurate detection operation can always be performed.

In order to define the position of the detection end face 22a,
In the first embodiment, an annular stopper 27 is integrally protruded from the inner peripheral wall of the mounting hole 23, and the sensor 22 is pushed into the mounting hole 23 until the stopper 22 abuts against the stopper 27 so that the position of the detection end face 22 a is adjusted. It can be done easily. Note that, instead of the stopper 27, a configuration in which the inner diameter of the mounting hole 23 is stepped to perform position regulation is also possible.

As described above, since the detection end face 22a is drawn inward by the distance G from the contact edge 24, the wall surrounding the contact edge surrounding the detection edge 22a is not affected by unnecessary disturbance light. This also has the effect of reducing the number of errors, and can further prevent malfunction in detection.

The holder 20 of the sensor mechanism 18 according to the first embodiment of the present invention described above has a fixed part 20a, a holding part 20b and an elastic part 20c integrally formed by integral molding of plastic, and a spring of the elastic part 20c. The embodiment using the bend property of plastic for elasticity was shown. However, in place of this, it is also possible to configure each part with individual members and materials. For example, the holding portion 20a may be replaced by the spacer 4 shown in FIG. 5 and the elastic portion 20c may be changed to use a metal leaf spring, which is included in the present invention. However, the one-piece plastic structure shown in the first embodiment is more preferable in that it is advantageous in terms of manufacturing cost and easy to assemble and mount.

Next, the second embodiment of the present invention will be described with reference to FIGS.
This embodiment will be described below with the same reference numerals given to the components corresponding to those of the first embodiment. In the second embodiment, as shown in FIG. 3, a card pressing elastic member 30 is provided on the rear side of the guide frame 13 with fixing screws 31.
Thus, it is fixed at the base end 30a.
The elastic member is formed by bending a single leaf spring material.
The portion extending from 0a rises from the surface of the guide frame 13, and the distal end is integrally bent as a rounded curved portion 30b as seen in FIG. 4A. The curved portion 30b is formed in the guide frame 13 through an opening 32 formed at the detection position 17 through the card guide path 14.
It is maintained in a state of entering the inside and constitutes a receiving portion.

The sensor mechanism 18 of the second embodiment has the above-described card pressing elastic member 30. On the other hand, the holder 20 of the sensor mechanism 18 is different from that of the first embodiment in FIG. As shown in (1), the holder 20b of the holder accommodating the reflection type photosensor 22 therein has the same structure. However, in the second embodiment, the holder 20
Is attached to one end of a substrate 25, and the substrate 25 is fixed to the guide frame 12 via a spacer 34 by bolts 33, and the elastic portion and the fixing portion shown in the first embodiment are not integrally provided. In this case, the spacer 34 is used as a fixing portion of the holder, and it can be regarded as one holder including the substrate 25, but in any case, there is no portion corresponding to the elastic portion in the first embodiment. The contact edge 24 of the holder 20 is connected to the window 16 of the guide frame 12.
, And occupies a fixed position in which it protrudes to a position slightly entering the card guide path 14 or a position substantially flush with the card guide path 14.

The curved portion 30b of the elastic member 30, which forms a receiving portion with respect to the fixed contact edge 24, has one wall 2 forming the contact edge 24 at the detection position 17 as shown in FIG.
When the card is not inserted, it is urged by the spring elasticity of the elastic member 30 when the card is not inserted, as shown in the figure, or is positioned at a slight distance therefrom. This interval is set to be equal to or less than the thickness of the time card.

Therefore, if a time card (not shown) is inserted into the card guide path 14 in the direction of the arrow shown in FIG. 4A, the card is brought into contact with the contact end by the urging action of the bending portion 30b at the detection position 17. Since the pressing edge is pressed against the edge 24, the corresponding contact edge 24 is securely applied to the corresponding surface of the card, and the reading interval between the detection end surface 22a of the sensor 22 in the holding portion 20b and the corresponding surface of the card is reduced. It is always kept constant. Further, since the curved portion 30b is rounded in the card feeding direction, it guides the card smoothly and prevents trouble in card feeding or card damage.

As described above, as shown in the second embodiment, the holder is provided with a biasing force for positively abutting the contact edge 24 on the corresponding surface of the card, as in the first embodiment. Instead, the corresponding contact edge is fixed, and the receiving edge is provided by a receiving portion from the opposite side. In the second embodiment, the elastic member 30 is formed of a single leaf spring material.
Although a simple and inexpensive configuration is desirable, it can be composed of a plurality of members. In addition, the present invention is not limited to these embodiments and can include various modifications.

[0022]

As described above, according to the present invention, a holder for holding a reflection type photosensor is provided, and a contact edge of the holder is provided on a corresponding surface of a time card passing through a card guide path during a detection operation. Since the contact structure is adopted, the distance between the detection end face of the sensor and the card surface, that is, the reading interval can always be kept constant, the reading error is eliminated, and more accurate sensor detection is possible. In addition, such high accuracy can be achieved without paying special attention to improving the accuracy of related parts and eliminating variations, etc. Thus, it is possible to provide a more reliable time clock sensor mechanism.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a main part of a sensor mechanism according to a first embodiment of the present invention.

FIG. 2A is an enlarged sectional view of a main part taken along line 2-2 of FIG. 1, and FIG. 2B is an enlarged explanatory view of a main part of FIG.

FIG. 3 is a rear view of a main part of a second embodiment of the present invention.

4A is a cross-sectional view taken along the line AA of FIG. 3, and FIG. 4B is a cross-sectional view taken along the line BB of FIG.

FIG. 5 is a longitudinal sectional view of a main part of a sensor mechanism having a conventional configuration.

[Explanation of symbols]

 15 Time card 17 Detection position 18 Sensor mechanism 20 Holder 20a Fixed part 20b Holding part 20c Elastic part 22 Reflective photo sensor 22a Detection end face 24 Contact edge 30 Card pressing elastic member 30b Curved part

Claims (3)

(57) [Scope of request for utility model registration] 1. A detection end face of a reflection type photosensor is opposed to a corresponding surface of a time card inserted along a card guide path at a detection position at an interval, and various kinds of information on the time card are detected by the sensor. In a sensor mechanism of a time clock for performing an operation, a holder having a holding portion accommodating the reflection type photosensor is provided, and a contact edge protruding from a detection end face of the sensor is further formed on the holding portion of the holder. At the detection position, a receiving portion is provided which comes into contact with the card guide path and which comes into contact with the back surface opposite to the corresponding surface of the time card inserted into the card guide path at the detection position. Set the interval with the contact edge to be equal to or less than the thickness of the time card, apply the contact edge to the corresponding surface of the time card at the detection position, and Over de corresponding surface time recorder of the sensor mechanism characterized by being kept constant the distance between the detection end face of the reflective photosensor. 2. A detection end face of a reflection type photosensor is opposed to a corresponding face of a time card inserted along a card guide path at a detection position at an interval, and various kinds of information on the time card are detected by the sensor. In a sensor mechanism of a time clock that performs an operation, the sensor mechanism includes a holding unit that holds the reflection-type photosensor, a fixed unit fixed on the time clock, and an elastic unit provided between the fixed unit and the holding unit. A holder is provided, and a contact edge protruding further from a detection end face of the sensor is formed on a holding portion of the holder. Wherein the contact edge is applied to maintain a constant distance between the corresponding surface of the time card and the detection end surface of the sensor. Of the sensor mechanism. 3. A detection end face of a reflection type photo sensor is opposed at a detection position to a corresponding surface of a time card inserted along a card guide path at an interval, and various kinds of information on the time card are detected by the sensor. In a sensor mechanism of a time clock for performing an operation, a holder having a holding portion accommodating the reflection type photosensor is provided, and a contact edge protruding from a detection end face of the sensor is further formed on the holding portion of the holder. At the detection position, the card guide path is approached, and at the detection position, an opening is formed in the guide frame forming the card guide path, and the back side of the time card inserted into the card guide path is opposite to the corresponding surface. A card pressing elastic member having a curved portion that is in contact with the opening through the opening; And abutting surfaces on the abutting edges of the holding portion of the holder, the time clock of the sensor mechanism which is characterized by comprising maintaining the distance between the corresponding surface and said detection end surface of the reflection type photosensor timecard constant.