JP3531204B2 - Coin identification sensor - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coin discriminating sensor used in a coin discriminating section of a coin discriminating device used in a ticket vending machine, a vending machine or the like.

[0002]

2. Description of the Related Art Generally, a plurality of coin identification sensors used in a coin identification device are arranged so as to face a coin passage surface, and when a coin passes, a change in magnetic flux generated between the opposing sensors is detected. It is used to identify coins.

Conventionally, this type of coin identification sensor has a structure as shown in FIGS. In FIGS. 4 and 5, 1 is a winding coil formed by concentrically winding a copper wire, and 2 is a high magnetic permeability arranged so as to surround the winding coil 1 in order to increase the inductance of the winding coil 1. Is a ferrite core.

The winding coil 1 is preliminarily wound as an air-core coil by an automatic winding machine, subjected to alcohol welding, fixed in a coil shape, and then inserted and fixed in the ferrite core 2. Further, from the opening surface of the ferrite core 2, the winding start end portion 1a and the winding end portion 1 of the winding coil 1 are
In a state where b is pulled out, the coin is fixed to an area suitable for identification of coins with an adhesive, and thereafter, the winding start / end portions 1a and 1b of the winding coil 1 are guided to a printed circuit board,
The assembler was manually connecting to the subsequent circuit while soldering.

[0005]

However, in the structure of such a conventional identification sensor, the winding start and end portions 1a and 1b of the winding coil 1 are exposed to the outside of the ferrite core 2 from the identification sensor. Winding coil 1
The beginning and end of the winding at the beginning and end of winding
Since a and 1b could not be clearly recognized, there was a possibility that incorrect connection might occur when the coin identification sensor was attached.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a coin identification sensor capable of preventing the wrong connection of the coin identification sensor.

[0007]

Means for Solving the Problems] coin discrimination sensor of the present invention in order to achieve this purpose, a ferrite core, a bobbin is inserted into this <br/> ferrite cores, winding wound on the bobbin Wire coil and planted on the bobbin
And a first end to which the starting end of the winding coil is connected
Bei the metal terminal, and a second metal terminal end portion of the winding <br/> feeder coil while being implanted in the bobbin is connected
For example, the first in the bobbin, with varied respectively the shape of the planting設用pedestal portion of the second metal terminal, wherein
Winding to pull the start end of the winding coil out of the bobbin
The bobbin is provided with a feeder line, and
The width of the ferrite core into which the
The widths of the metal terminals are substantially the same.

[0008]

With this configuration, since the winding start end and the winding end of the coin identification sensor can be clearly recognized, it is possible to prevent the coin identification sensor from being erroneously connected.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 and 2 show a coin identification sensor according to the present invention, in which 1 is a winding coil, 2 is a ferrite core, 3 is a bobbin inserted into the ferrite core 2,
4a and 4b are first and second metal terminals implanted in the bobbin 3, 5a and 5b are pedestals for press-fitting the metal terminals 4a and 4b into the bobbin 3, and 6 is a winding coil 1.
A winding thread passage portion for guiding the winding wire at the beginning and end of winding to the outside of the bobbin 3, and an adhesive 7 for bonding the bobbin 3 and the ferrite core 2. Also, FIG.
[FIG. 3] is a plan view of a bobbin 3 which constitutes a coin discriminating sensor in one embodiment of the present invention, and a pedestal portion 5a for a starting end portion has a substantially circular outer shape. Also, the pedestal part 5b for the terminal part
Has a substantially rectangular outer shape, and three of these are provided in order to accommodate the difference in the length of the terminal. Next, each part will be described in detail.

As the winding coil 1, a first-class polyurethane adhesive copper wire (wire diameter 0.1 mm: manufactured by Tokyo Special Electric Wire Co., Ltd.) is used. After the copper wire coating is welded with methyl alcohol, the winding itself is fixed. It uses what can be made. It was necessary to select a bobbin 3 made of a material having high heat resistance in order to prevent thermal deformation when passing through the solder dip tank in automation of soldering of the coin identification sensor.

Specifically, materials such as polyphenylene sulfide (PPS) type, polypropylene (PPP) type, polybutylene terephthalate (PBT) type, etc. can be used, but in the present embodiment, PBT type materials are selected. did.

[0012] This is because the PBT material is excellent in thermoplasticity, so that the injection method can be performed by ordinary injection molding.
This is because it has a high degree of freedom in molding conditions and has a feature that it can be reused as a recycled material.

Further, the bobbin 3 is characterized by being provided with three winding yarn path portions 6 for drawing out winding start and winding end portions of the winding coil 1.

This is a bobbin 3 for coin identification sensor.
This is because the accuracy of coin identification is more stable as the winding state of the winding coil 1 to be wound on the bobbin 3 is more aligned, and especially when the winding coil 1 is wound on the bobbin 3. It is necessary to avoid winding disorder due to the step of the wire.

Therefore, the winding start of the winding coil 1 and
At the end of winding, it is necessary to form a winding yarn path portion 6 on the bobbin 3 so that a step is not generated between adjacent windings, and to release a wire diameter width of one winding at the beginning of winding. It was

A plurality of metal terminals 4a, 4b are planted in the pedestal portions 5a, 5b of the bobbin 3, and the start and end portions of the winding coil 1 are connected to the plurality of metal terminals 4a, 4b.
Wrap it around. In addition, the metal terminals 4a, 4b
Forms a metal terminal by using an inexpensive CP wire having good solderability. Furthermore, the metal terminals 4a and 4b are 0.5 m
The prismatic shape is m-square. By making this into a prismatic shape, it is possible to easily cut and shape the end of the winding coil 1 wound around the metal terminals 4a and 4b, and the coin identification sensor itself can be efficiently manufactured. It has features that make it possible.

Further, the plurality of metal terminals 4a and 4b had to have the positional relationship as shown in FIG. Specifically, the angles of the straight lines connecting the two metal terminals located diagonally among the four metal terminals 4a and 4b in FIG. 2 are 127.6 degrees and 52.4 degrees, respectively. By arranging the four metal terminals 4a and 4b on the bobbin 3 at positions intersecting with each other, the width A in the lateral direction of the ferrite core 2 and the metal terminals 4a-4b, 4b-4b are arranged. Since the widths of the narrow portions can be matched, when inserting and fixing the bobbin 3 into the ferrite core 2, it is possible to prevent the ferrite core 2 and the bobbin 3 from rotating at the same time, and yet It can have the characteristic that the positioning is uniquely determined.

Further, in order to prevent the coin identification sensor from being erroneously connected, the shape of the base portion 5a of the metal terminal 4a around which the starting end portion of the winding coil 1 is wound is made different from the shape of the other base portions 5b. Specifically, as shown in FIG. 2, the pedestal portion 5a is a round pedestal portion and the pedestal portion 5b is a square pedestal portion.

In this manner, by making the pedestal portion 5a of the metal terminal 4a around which the starting end portion of the winding coil 1 is wound different from the shape of the other pedestal portion 5b, the starting end portion and the terminating end portion of the winding coil 1 in the coin identification sensor. The parts can be clearly distinguished, and it is possible to prevent erroneous connection when the coin identification sensor is mounted.

Although the pedestal portions 5a and 5b are changed in shape in this embodiment, the metal terminals 4a and 4b may have different lengths. In this case, it is possible by individually changing the terminal dimensions of the metal terminal press-fitting jig, and in the case of a coin identification sensor having a large number of the metal terminals to be implanted, the coin identification sensor itself may be erroneously attached. This is an effective way to prevent it.

Metal terminals 4 provided on the pedestals 5a and 5b
The holes for inserting a and 4b are formed as through holes in the bobbin 3. This is because when the soldering is performed in the solder dip tank after the metal terminals 4a and 4b are press-fitted into the bobbin 3, the heat transferred to the metal terminals 4a and 4b can be quickly released through the through hole, and the soldering can be performed. This is because there is an effect of preventing the metal terminals from coming off due to the difference between the thermal expansion coefficients of the metal terminals 4a and 4b and the thermal expansion coefficient of the bobbin 3 at that time.

The ferrite core 2 is arranged so as to surround the winding coil 1 in order to increase the inductance of the winding coil 1 wound around the bobbin 3. Although the shape of the ferrite core 2 differs depending on the coin discriminating method, any shape of a pot type core, a drum type core, and an E type core can be used. Uses a ferrite core.

Further, when the ferrite core 2 is made of a material having a high magnetic permeability, the inductance as a coin discriminating sensor increases. However, it is necessary to consider the frequency characteristic in which the coin identification sensor is used, and it is not enough to increase the inductance of the coin identification sensor. Generally, the frequency characteristics of the ferrite core 2 and
Since the magnetic permeability affects the cost of the ferrite core 2, it is necessary to select a ferrite core having an appropriate magnetic permeability in the frequency band used.

Therefore, in the coin discriminating sensor according to the present embodiment, since the oscillation frequency of the discriminating circuit connected in the subsequent stage is around 100 to 200 kHz, the ferrite core 2 used is most stable in the above frequency band. It has characteristics and the permeability of the ferrite core is 20.
A material having a value of 00 to 3000 was selected. In particular,
H5A (ferrite core material made by TDK) or 2C
Three materials (ferrite core material manufactured by Tomita Electric Co., Ltd.) are used.

As described above, according to this embodiment, the ferrite core 2 and the bobbin 3 inserted into the ferrite core 2 are used.
And a winding coil 1 wound around the bobbin 3, and the bobbin 3 has a plurality of implanted metal terminals 4
a and 4b are provided, and the plurality of metal terminals 4 are provided.
In the case of winding the starting end portion and the terminating end portion of the winding coil 1 around a and 4b, the pedestal portion 5a is different only in the winding starting end portion from the other pedestal portions 5b. The start end of the winding coil 1 and the end of the winding coil 1 in the sensor can be clearly recognized, and erroneous connection of the coin identification sensor can be prevented. Further, according to this embodiment, the metal terminals 4a and 4b implanted in the bobbin 3 can be directly mounted on the printed circuit board, so that automatic soldering is possible and the workability of mounting the coin identification sensor is improved. It can be significantly improved.

[0026]

As described above, according to the present invention, the starting end of the winding coil and the ending end of the winding coil of the coin identification sensor are made different by changing the shapes of the plurality of pedestals in which the metal terminals are implanted. Since the parts can be clearly recognized, incorrect connection can be prevented.

Further, Runode a metal terminal, be wrapped beginning of winding coils, the end portions to the metal terminal by an automatic machine
it can. Furthermore, a winding thread passage is formed on the bobbin.
Therefore, the winding state is not
It Therefore, the accuracy of coin identification can be stably obtained. Further
Also, the width of the ferrite core and the first and second metal ends
By making the widths between the children substantially the same,
When inserting it into the ferrite core and fixing it,
It is possible to simultaneously stop rotation of the iron core and the bobbin .

[Brief description of drawings]

FIG. 1 is a perspective view of a coin identification sensor according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of a coin identification sensor according to an embodiment of the present invention.

FIG. 3 is a plan view of a bobbin that constitutes a coin identification sensor according to an embodiment of the present invention.

FIG. 4 is a perspective view of a conventional coin identification sensor.

FIG. 5 is an exploded perspective view of a conventional coin identification sensor.

[Explanation of symbols]

1 winding coil 2 Ferrite core 3 bobbins 4a First metal terminal 4b Second metal terminal 5a Pedestal 5b Pedestal 6 winding thread part 7 adhesive

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Claims (3)

(57) [Claims] And 1. A ferrite core, a bobbin to be inserted into the ferrite core, a winding coil wound on the bobbin, the starting end of the <br/> winding coils while being implanted in the bobbin A first metal terminal to which is connected ,
And a second metal terminal end portion of the winding coil while being implanted in the bobbin is connected, the first in the bobbin, the shape of the planting設用pedestal portion of the second metal terminal respectively Different from the winding coil
In front of the winding thread path to pull the start end out of the bobbin.
The bobbin is provided and the bobbin is inserted.
Between the width of the ferrite core and the first and second metal terminals
A coin identification sensor whose widths are substantially the same . 2. The coin identification sensor according to claim 1, wherein the first and second metal terminals have a prismatic shape. 3. The coin identification sensor according to claim 2, wherein the bobbin is provided with a through hole into which the first and second metal terminals are press-fitted.