JP2000237384A - Game ball detector and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily increase the margin of a coil by efficiently arranging detection coils. SOLUTION: Two detection coils 31, 32 and a circuit board 4 are housed between a body 1a and a cover constituting a casing 1. A coil 7 is wound on the coil barrel part of a coil bobbin 5 and a pair of terminals 9a and 9b are insertion molded so as to project in the normal direction from one flange part. When the two coils 31, 32 are connected with the board 4, a sufficient gap is formed between inner terminals 9b, 9b and the mounting surface of the board 4. That is, since the terminals 9b, 9b on one side of the coils 31, 32 do not occupy the mounting surface of the board 4 and an electronic component 10 can be mounted at a position opposing the terminals 9b, the degree of freedom of the design of the circuit 4 is increased and the size of the bobbin 5 is increased as a result to increase the margin of the coil 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a game ball detector for detecting the passage of a game ball (so-called pachinko ball) used in a game board (so-called pachinko) and counting the number of the game balls. .

[0002]

2. Description of the Related Art Conventionally, as a game ball detector for detecting a game ball made of metal (steel ball), a high-frequency current is passed through a detection coil arranged near a passage portion of the game ball.
It is known to detect the passage of a game ball by using a change in the impedance of a detection coil (for example, Japanese Patent Application Laid-Open Nos. 9-56875 and 9-264965).
Reference). That is, the fact that the impedance of the detection coil changes due to an eddy current loss when the game ball passes near the detection coil in which the high-frequency current is flowing. In general, the detection coil is also used as the oscillation coil of the high-frequency oscillation circuit, and the signal processing circuit detects the oscillation stop of the high-frequency oscillation circuit due to the change in the impedance of the detection coil and the change in the level of the oscillation output. The corresponding output is generated.

A circuit section including a high-frequency oscillation circuit and a signal processing circuit is mounted on a circuit board composed of a printed board, and a detection coil is connected to the circuit board. The detection coil and the circuit board are housed in a casing made of an insulating material such as a synthetic resin. Here, the circuit section detects changes in the output of the high-frequency oscillation circuit,
Malfunction may occur due to the influence of static electricity, metals other than play balls, magnets, and the like. Therefore, the inventor of the present invention connected two sensing coils each formed of an air-core coil in series so that the absolute values of the magnetic moments of the high-frequency magnetic fields generated from the two sensing coils were the same and the directions were opposite to each other. A game ball detector that solves problems such as noise resistance by reducing a part of the high-frequency magnetic field, lowering the detection accuracy due to mutual interference between the two detection coils, and erroneous detection when a permanent magnet is approached. is suggesting.

FIG. 14 shows the above-mentioned conventional game ball detector. The synthetic resin casing 1 covers a body 1a having a through hole 2 penetrating vertically through which a game ball passes, and a portion of the body 1a where the through hole 2 is not formed (the right half in FIG. 14). And a cover (not shown). In a portion where the cover is covered, two detection coils 20 and 20 are provided between the body 1a and the cover.
And a circuit board 4 composed of a printed board.

The detection coil 20 has a winding 23 wound around a winding body 22 of a coil bobbin 21 made of a synthetic resin as shown in FIG.
The two terminals of the winding 23 are respectively connected to a pair of substantially L-shaped terminals 25, 25 protruding from 4.
Then, as shown in FIG.
Reference numeral 0 denotes each terminal 25 which is disposed so that the other flange portion 24 of the coil bobbin 21 abuts on the peripheral wall 2a of the through hole 2 and is inserted into a substantially U-shaped concave portion 4c provided at an end of the circuit board 4.
25 is soldered to a conductive portion (land) formed on the periphery of the concave portion 4c, and is electrically connected to a circuit portion mounted on the circuit board 4. Here, a light beam method is generally used for solder bonding. The light beam is irradiated from the upper direction in FIG. 15, and the thread solder K is supplied, for example, from the illustrated direction. The advantage of such a terminal structure is that the circuit board 4
In this case, a conical fillet is easily formed in the soldering with the solder, and the soldering quality is improved.

[0006]

However, since an air-core coil does not have a core such as ferrite, a winding specification (wire diameter, wire diameter, resistance, etc.) having an inductance value and a resistance value sufficient for stable high-frequency oscillation is provided. In order to obtain the number of turns, it is necessary to increase the winding allowance of the winding as compared with the case where the core is provided. Reducing the cross-sectional area of the bobbin portion 22 of the coil bobbin 21 may be one of measures to secure the winding allowance, but there is a limit in forming the coil bobbin 21 with a synthetic resin. If the above problem cannot be solved by itself, the only way to achieve the above winding specifications is to increase the space occupied by the detection coil 20 itself in the casing 1.

On the other hand, if the size of the detection coil 20 is increased within the limited size of the casing 1, the circuit board 4 must be reduced, but the circuit board 4 must be reduced due to the mounting components. Also have limitations. Therefore, it is important how to take a structure that increases the winding allowance of the winding 23 while ensuring the minimum size of the circuit board 4 within the limited size of the casing 1. Conversely, the winding width of the winding 23 is determined depending on the structure in which the detection coil 20 and the circuit board 4 can be efficiently arranged, and the stability of oscillation is affected. In addition, since the number of the detection coils is two instead of one, the detection coils 20 and 20 are required to have a structure that does not increase wasteful space and can be manufactured at low cost.

In the structure shown in FIG. 14, terminals 25 on the inner side (adjacent side) of the two detection coils 20, 20 arranged side by side also cross the circuit board 4 and are soldered to the conductive portion. And are electrically connected by the conductor pattern of the circuit board 4. Detection coil 20, 2
Since the terminal 25 inside 0 is not electrically connected to the circuit components mounted on the circuit board 4, occupying the space of the circuit board 4 as described above is an inefficient structure. This causes the winding margin of the winding 23 to not be large.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the invention according to claims 1 to 3 is to efficiently arrange a detection coil to easily increase a winding allowance. The object of the present invention is to provide a game ball detector capable of performing the above.

A fourth object of the present invention is to provide a game ball detector capable of efficiently arranging the detection coils to easily increase the winding allowance and manufacturing the detection coils at low cost. To provide.

It is still another object of the present invention to provide a method for manufacturing a game ball detector capable of improving the solderability between a terminal of a detection coil and a circuit board.

[0012]

SUMMARY OF THE INVENTION In order to achieve the above object, a first aspect of the present invention is to provide a casing having a through hole through which a metal play ball passes, and a casing arranged close to the through hole in the casing. A circuit part for detecting that a game ball has passed through the passage hole based on a change in impedance of the two detection coils and a flow of the high-frequency current to each detection coil and of the detection coils is mounted at a fixed position in the casing. A fixed circuit board is provided, and the detection coil has a coil wound around a coil bobbin made of an insulating material, and a pair of terminals having both ends of the winding connected to one end, respectively, protruding from the same side surface of the coil bobbin. The respective terminals of the two detection coils are arranged on the same surface side with respect to the circuit board in a state where they are arranged in the casing, and one of the adjacent detection coils Are electrically connected to each other, non-adjacent terminals of each detection coil are respectively connected to the circuit board, and terminals electrically connected to the terminals of the other detection coils are at a predetermined distance from the surface of the circuit board. The space occupied by the terminals of the detection coil on the circuit board is reduced, and the detection coil can be efficiently arranged to easily increase the winding allowance.

According to a second aspect of the present invention, in the first aspect of the present invention, a plane including a pair of terminals of each detection coil is substantially parallel to a surface of a circuit board facing these terminals in a state of being disposed in the casing. As described above, each terminal is formed to protrude from the side surface of the coil bobbin, and the two detection coils can be formed in the same shape, thereby reducing the manufacturing cost.

According to a third aspect of the present invention, in the first or second aspect of the present invention, two adjacent terminals of the two detection coils are joined by soldering, and the adjacent terminals are joined directly by soldering. This simplifies the connection work of the detection coil.

In order to achieve the above object, a fourth aspect of the present invention is directed to a casing having a through hole through which a metal play ball passes, and two detection devices arranged in the casing in close proximity to the through hole. A coil and a circuit board on which a high-frequency current is applied to each detection coil and a circuit portion for detecting that a playing ball has passed through the passage hole based on a change in impedance of the detection coil is mounted and fixed at a fixed position in a casing; The detection coil has a winding wound around a coil bobbin made of an insulating material, and both ends of the winding are each formed by projecting a pair of terminals connected to one end thereof from the same side surface of the coil bobbin. The two detection coils are arranged side by side in the casing such that the projecting direction is substantially orthogonal to the normal direction of the circuit board surface, and the other detection coils are arranged in the casing. The inner terminals adjacent to the coil are electrically connected to each other, and the outer terminals that are not adjacent to the other detection coils are connected to the circuit board, respectively. It is characterized in that the outer terminals protrude from the terminal, and the inner terminals protrude from a position displaced along the normal direction of the circuit board by about half the terminal diameter from the approximate center of the width dimension. The space occupied by the terminals of the coil on the circuit board is reduced, the detection coil can be efficiently arranged, the winding allowance of the winding can be easily increased, and the two detection coils can be formed in the same shape. Since the arrangement direction with respect to the circuit board is not restricted, the manufacturing cost can be further reduced.

In order to achieve the above object, the invention according to claim 5 includes a casing having a through hole through which a metal play ball passes, a detection coil disposed in the casing near the through hole, A circuit board is mounted on which a high frequency current is supplied to the detection coil and which detects that the playing ball has passed through the passage hole based on a change in the impedance of the detection coil, and is fixed at a fixed position in the casing. In the coil, a winding is wound around a coil bobbin made of an insulating material, and a pair of terminals having both ends of the winding connected to one end respectively protrude from the coil bobbin, and at least one terminal is formed on the surface of the circuit board. A method of manufacturing a game ball detector soldered to a conductive part, comprising: applying a preliminary solder to the conductive part on the surface of the circuit board so as to be biased toward one end of a terminal of the detection coil. It is characterized by irradiating a light beam to the thread solder supplied from the side where the spare solder is not biased and soldering the terminal to the conductive part, improving the solder jointability between the terminal of the detection coil and the circuit board. It is possible to provide a possible method of manufacturing a game ball detector.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (Embodiment 1) As shown in FIG. 1, a casing 1 made of a synthetic resin is composed of a body 1a having a vertically penetrating through hole 2 through which a game ball passes, and a body 1a. A portion where the passage hole 2 is not formed (FIG. 1
In this case, it is formed by combining a cover (not shown) covered on the right half). The site where the cover is Kutsugaechaku, two detection coils 3 _1, 3 ₂ and the circuit board 4 made of printed circuit board is accommodated between the body 1a and the cover.

The detection coils 3 ₁ and 3 ₂ are formed by winding the windings 7 around the winding body 6 of a coil bobbin 5 made of a synthetic resin by the same number of turns in opposite directions. As shown in FIG. 4, substantially rectangular flanges 8a and 8b are formed at both ends of the winding drum 6, and a pair of terminals 9a and 9b are inserted from one of the flanges 8b so as to project in the normal direction. Is molded. Although not shown, the flange 8 of each terminal 9a, 9b is provided.
Both ends of the winding 7 are connected to one end of the b side, respectively. Further, a thin solder is applied to the peripheral surfaces of the tips of the terminals 9a and 9b (hereinafter, such solder is referred to as "finished solder"). Here, the one terminal 9a is substantially at the center in the short width direction of the flange portion 8b and protrudes from the edge of the flange portion 8b from a position about half the thickness of the above-mentioned finished solder. On the other hand, the other terminal 9b is biased to one side from the approximate center of the flange portion 8b in the short width direction and protrudes from the edge of the flange portion 8b from a position about half the thickness of the finish solder.
However, the two detection coils 3 ₁ and 3 ₂ are in a mirror image relationship with the flange 8b as shown in FIG.

As shown in FIG. 2, the _two detection coils 3 ₁ and 3 ₂ configured as described above have a flange 8a on which the terminals 9a and 9b are not protruded as shown in FIG. The flanges 8b are arranged side by side so that the end faces of the flange portions 8b on the terminal 9b side are in contact with each other. At this time, the terminal 9 outside the coil block composed of the _two detection coils 3 ₁ and 3 ₂
a, 9a are opposed to conductive portions (lands) 4a, 4a formed on the end surface of the circuit board 4 with a very small gap therebetween, and the terminals 9b, 9b,
Reference numeral 9b is adjacent to a distance such that the finished solder substantially contacts. Thus, by irradiating the light beam, the terminal 9a and the land 4a and the two terminals 9b, 9b can be easily soldered to each other.
_1, 3 ₂ can connect the circuit board 4 has a circuit portion electrically to be implemented in conjunction with series connection.

Here, when the coil block composed of the _two detection coils 3 ₁ and 3 ₂ is connected to the circuit board 4 as described above, both the outer terminals 9a and 9a and the inner terminals 9b and 9b are connected. A sufficient space is left between the terminals 9 b, 9 b on the mounting surface (the front surface in FIG. 1) of the circuit board 4 and the mounting surface of the circuit board 4. As a result, as shown in FIG. 1 and FIG. 3, the electronic components (chip resistors, capacitors, etc.) 10 can be arranged on the mounting surface of the circuit board 4 at the position facing the inner terminals 9b, 9b. That is, one terminal 9b, 9b of the detection coils 3 ₁ , 3 ₂ does not occupy the mounting surface of the circuit board 4,
In addition, since the electronic component 10 can be mounted at a position facing the terminals 9b, 9b, the degree of freedom in designing the circuit board 4 is increased, and the size of the coil bobbin 5 is increased, so that the winding allowance of the winding 7 can be increased. .

Since the mounting of the electronic component 10 and the like on the circuit board 4 is performed by a reflow method, the terminals 9a, 9
Solder paste (preliminary solder) is also printed on lands 4a, 4a to which a is soldered. As shown in FIG. 6A, the solder paste P1 is printed using a metal mask having openings similar to the lands 4a, 4a, and the terminals 9a, 9a are landed using the thread solder K while irradiating a light beam. 4a, 4a
When soldering to the lands 4a, the terminals 9a, 9a of the lands 4a, 4a
The temperature in the shaded area of a is unlikely to rise, and the land 4a,
4a becomes difficult to uniformly wet, and the solder hardly turns to the side opposite to the side where the thread solder K is supplied. Therefore, FIG.
As shown in (b), the solder 9 may be added only to one end in the width direction of the terminals 9a, 9a, and the terminals 9a may not be sufficiently joined.

Therefore, using a metal mask having a substantially trapezoidal opening, as shown in FIG.
a is slightly protruded from the side end of a
The solder paste P2 is printed in a substantially trapezoidal shape that does not protrude from the side end of “a”. By doing so, the solder paste P2 melted by the temperature rise during reflow soldering
5B, the portion protruding from the land 4a rises above the land 4a, and the solder paste P2 is shifted to one end in the width direction of the terminal 9a as shown in FIG. 5B. When the light beam is applied to supply the thread solder K from the thin side of the solder paste P2, the solder is attached to the thin side of the solder paste P2, and fillets can be formed substantially uniformly on both sides in the width direction of the terminal 9a. . As a result, the detection coil 3 _1, 3 ₂ terminals 9a, the 9a and the circuit board 4 lands 4a,
Thus, high soldering quality can be ensured by improving the solder jointability with 4a.

(Embodiment 2) By the way, in Embodiment 1, the two detection coils 3 ₁ and 3 ₂ are in a mirror image relationship.
Two different types of coil bobbins 5 must be manufactured, and a mold is required for each, resulting in high cost.

Therefore, in the present embodiment, as shown in FIG. 10, the two terminals 9a and 9b are shifted to one side from the approximate center of the flange 8b of the coil bobbin 5 in the short width direction and the flange 8b
From the inner edge of the above-mentioned solder, about half the thickness of the finish solder. That is, it two detection coils 3 _1, 3 ₂ of the coil bobbin 5 and the same shape. However, the windings 7 are wound in opposite directions.

The two detection coils 3 ₁ and 3 ₂ configured as described above are connected to terminals 9a and 9b as shown in FIGS.
The flange 8a, which is not protruded, passes through the peripheral wall 2a of the passage hole 2.
Are arranged side by side so as to abut against. At this time, the terminals 9a, 9a outside the coil block composed of the _two detection coils 3 ₁ , 3 ₂ have a slight gap with respect to the conductive portions (lands) 4a, 4a formed on the end surface of the circuit board 4. The terminals 9b, 9b on the inner side of the coil block are also opposed to each other from the mounting surface of the circuit board 4 with a clearance substantially equal to the clearance, and adjacent to each other at a distance such that the finished solder is substantially in contact with each other. Become. By irradiating the light beam, the terminal 9a and the land 4a, and the two terminals 9b, 9b
Can be easily soldered to each other.
One of the detecting coil 3 _1, 3 ₂ can connect the circuit board 4 has a circuit portion electrically to be implemented in addition to the series connection (see FIGS. 7 and 8).

Here, when the coil block composed of the _two detection coils 3 ₁ and 3 ₂ is connected to the circuit board 4 as described above, both the outer terminals 9 a and 9 a and the inner terminals 9 b and 9 b are connected. A gap is left between the terminals 9 b, 9 b on the mounting surface (the front surface in FIG. 7) of the circuit board 4 and the mounting surface of the circuit board 4. As a result, as shown in FIG. 7 and FIG.
The conductor pattern 11 can be formed by applying a resist to the mounting surface of the circuit board 4 at a position facing 9b. That is, one of the terminals 9b, 9b of the detection coils 3 ₁ , 3 ₂ does not occupy the mounting surface of the circuit board 4, and the conductor pattern 11 can be formed at a position facing the terminals 9b, 9b. The degree of freedom of design is increased, and the dimension of the coil bobbin 5 is increased, so that the winding margin of the winding 7 can be increased. Moreover, in the present embodiment, since the coil bobbins 5 of the _two detection coils 3 ₁ and 3 ₂ have the same shape, the coil bobbins 5 can be manufactured by one mold, and the manufacturing cost of the detection coils 3 ₁ and 3 ₂ is reduced. There is an advantage that can be.

[0027] (Embodiment 3) By the way, because they ₁ 3 two detection coils, 3 ₂ of the coil bobbin 5 and the same shape in the embodiment 2, the manufacturing cost of the coil bobbin 5 is able to be produced in a single mold although it is to reduce, using the same ones the two sensing coils 3 _1, 3 ₂ winding 7 against the bobbin 5 from the opposite direction must winding not, as a detection coil 3 _1, 3 ₂ Can not do it. In the present embodiment, not only the coil bobbins 12 have the same shape, but also the same coils can be used as the detection coils 3 ₁ and 3 ₂ .

As shown in FIG. 12, the coil bobbin 12
Are substantially U-shaped flanges 14a, 14b at both ends of the winding drum 13.
And two terminals 1 are attached to one flange 14b.
5a and 15b are provided. One terminal 15a
Is substantially at the center in the short width direction of the flange portion 14b and
The protrusion protrudes from the inner edge of the terminal 15a from a position about half the thickness of the finish solder applied to the terminal 15a. The other terminal 15b protrudes from a substantially central portion of the flange portion 14b facing the winding drum portion 13, and is approximately parallel to the end surface of the flange portion 14b and approximately from the center in the short width direction of the flange portion 14b to the thickness of the finished solder. It is extended only by shifting. Then, two detection coils 3 ₁ by winding the winding 16 in the same direction relative to the winding drum portion 13 of the coil bobbin 12, 3 ₂ can be manufactured.

[0029] In Thus, one of the detecting coil 3 ₂ As shown in FIG. 13 from the placed first in the casing 1, the other sensing coil 3 ₁ change the orientation arranged in the casing 1. At this time, one of the terminals 15b, 15b is shifted from the approximate center of the flange portion 14b in the short width direction by the thickness of the finished solder, so that when the two detection coils 3 ₁ , 3 ₂ are arranged side by side in the casing 1, they are mutually separated. They are almost touching. Therefore, the two terminals 15b, 15b can be easily soldered by applying the thread solder while irradiating the light beam. The terminals 15b, 15b and the winding drum 13
Since there is a sufficient space between them, there is no danger of short circuit.
In addition, as shown in FIG.
A notch 4b for escaping 5b, 15b is provided.

On the other hand, the outer terminals 15a, 15a
4b is located substantially at the center in the short width direction.
Even if the inside is opposite to the left and right in FIG. 13, the relative distance to the circuit board 4 does not change, and it can be easily connected to the lands 4 a of the circuit board 4.

As described above, according to the present embodiment, since the coil bobbins 12 of the _two detection coils 3 ₁ and 3 ₂ have the same shape, not only a common mold is required, but also the detection coils 3 ₁ and 3 ₂ have the same shape. since it winding direction of the winding 16 in the same, it is sufficient to manufacture only one type as the detecting coil 3 _1, 3 _2. That is, since the two detection coils 3 ₁ and 3 ₂ are arranged in the opposite directions in the casing 1, the generated high-frequency magnetic flux just cancels out. In the first embodiment, the electronic component 10 can be arranged on the mounting surface of the circuit board 4 facing the inner terminals 9b, 9b. However, as a practical matter, the electronic component 10 is limited to low-profile components such as chip resistors and chip capacitors. On the other hand, in the present embodiment, it is impossible to arrange components under the inner terminals 15b, 15b, but the space occupied in the casing 1 can be minimized, and the detection coil of the circuit board 4 3 ₁ ,
A position close to 3 ₂ it is possible to arrange the tall component 17 such as an IC.

[0032]

According to the first aspect of the present invention, there is provided a casing having a through hole through which a metal play ball passes, two detecting coils arranged in the casing in close proximity to the passing hole, and each detecting coil. A circuit board mounted with a circuit part for detecting that the playing ball has passed through the passage hole based on a change in the impedance of the detection coil while passing a high-frequency current to the detection coil, and a circuit board fixed at a fixed position in the casing, The winding is wound around a coil bobbin made of an insulating material, and both ends of the winding are formed by projecting a pair of terminals respectively connected to one end from the same side surface of the coil bobbin, and arranged in a casing. Each terminal of the two detection coils is arranged on the same surface side with respect to the circuit board, and one adjacent terminal of each detection coil is electrically connected to each other. The non-adjacent terminals are respectively connected to the circuit board, and the terminals electrically connected to the terminals of the other detection coils are arranged at a predetermined distance from the surface of the circuit board. There is an effect that the space occupied in the circuit board is reduced, and the detection coil can be efficiently arranged to easily increase the winding allowance.

According to a second aspect of the present invention, each terminal of the coil bobbin is arranged such that a plane including a pair of terminals of each detection coil is substantially parallel to a surface of a circuit board opposed to the terminals when the terminals are arranged in the casing. Because it is made to protrude from the side,
There is an effect that the two detection coils can be formed in the same shape and the manufacturing cost can be reduced.

According to the third aspect of the present invention, one adjacent terminal of the two detection coils is joined by soldering. Therefore, by directly soldering the adjacent terminals, the connection work of the sensing coil can be simplified. This has the effect.

According to a fourth aspect of the present invention, there is provided a casing having a through hole through which a metal play ball passes, and two detection coils arranged in the casing in close proximity to the through hole.
A circuit board mounted with a circuit portion for detecting that a game ball has passed through the passage hole based on a change in impedance of the detection coil while allowing a high-frequency current to flow through each detection coil, and a circuit board fixed at a fixed position in the casing, The detection coil is formed by winding a coil around a coil bobbin made of an insulating material and projecting a pair of terminals having both ends of the winding respectively connected to one end from the same side surface of the coil bobbin. The two detection coils are arranged in the casing so as to be substantially orthogonal to the normal direction of the circuit board surface,
The inner terminals adjacent to the other detection coils are electrically connected to each other while being disposed in the casing, and the outer terminals not adjacent to the other detection coils are respectively connected to the circuit board, and the circuit board on the side surface of the coil bobbin. The outer terminals protrude from the approximate center of the width dimension along the normal direction of the circuit board, and the inner terminals are shifted from the approximate center of the width dimension by about half the terminal diameter along the normal direction of the circuit board. Since the terminals are protruded, the space occupied by the terminals of the detection coil on the circuit board is reduced, the detection coil can be efficiently arranged, the winding winding can be easily increased, and the two detection coils have the same shape. Since it can be formed and the arrangement direction with respect to the circuit board is not restricted, there is an effect that the manufacturing cost can be further reduced.

According to a fifth aspect of the present invention, there is provided a casing having a through hole through which a metal play ball passes, a detecting coil disposed in the casing in close proximity to the passing hole, and a high frequency current flowing through the detecting coil. A circuit board for detecting that the playing ball has passed through the passage hole based on a change in the impedance of the detection coil, and a circuit board fixed at a fixed position in the casing, wherein the detection coil is a coil bobbin made of an insulating material. The two ends of the winding are respectively projected from the coil bobbin, and both ends of the winding are projected from the coil bobbin, and at least one terminal is soldered to a conductive part formed on the surface of the circuit board. A method for manufacturing a game ball detector comprising the steps of: preliminarily soldering a conductive portion on a surface of a circuit board to one side of a terminal of a detection coil; Since the light beam is applied to the thread solder supplied from the other side and the terminal is soldered to the conductive part, there is a method of manufacturing a game ball detector that can improve the soldering property between the terminal of the detection coil and the circuit board. There is an effect that it can be provided.

[Brief description of the drawings]

FIG. 1 is a partially omitted plan view showing a first embodiment with a cover removed.

FIG. 2 is a side cross-sectional view of the same as above, with a cover removed and a part thereof omitted.

FIG. 3 is a side view of the detection coil in the first embodiment.

4A and 4B show a coil bobbin in the above embodiment, wherein FIG. 4A is a front view, FIG. 4B is a side view, and FIG. 4C is another side view.

FIGS. 5A and 5B are explanatory views for explaining a manufacturing method of the above.

6 (a) and 6 (b) are explanatory diagrams for explaining a manufacturing method of the above.

FIG. 7 is a partially omitted plan view of the second embodiment with a cover removed.

FIG. 8 is a side cross-sectional view showing the same as above with a cover removed and a part thereof omitted.

FIG. 9 is a side view of the detection coil in the above.

10A and 10B show a coil bobbin in the above embodiment, wherein FIG. 10A is a front view, FIG. 10B is a side view, and FIG. 10C is another side view.

FIG. 11 is a partially omitted plan view of the third embodiment with a cover removed.

FIGS. 12A and 12B show the coil bobbin in FIG. 12, wherein FIG. 12A is a front view and FIG. 12B is a side view.

FIG. 13 is a side view of the detection coil in the above.

FIG. 14 is a partially omitted plan view showing a conventional example with a cover removed.

FIG. 15 is a partially omitted side sectional view showing a state in which the cover is removed, showing the above.

FIGS. 16A and 16B show the same coil bobbin, FIG. 16A is a front view, FIG. 16B is a side view, and FIG. 16C is another side view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Casing 2 Passing hole 3 Detecting coil 4 Circuit board 5 Coil bobbin 9a, 9b Terminal 10 Electronic component

Claims (5)

[Claims] 1. A casing having a through hole through which a metal play ball passes, two detection coils arranged side by side in the casing in close proximity to the passage hole, and a high-frequency current flowing through each detection coil for detection. A circuit board for detecting that the play ball has passed through the passage hole based on a change in the impedance of the coil is mounted and a circuit board fixed at a fixed position in the casing, and the detection coil is provided on a coil bobbin made of an insulating material. The winding is wound, and both ends of the winding are formed by projecting a pair of terminals respectively connected to one end from the same side surface of the coil bobbin, and each terminal of the two detection coils is disposed in the casing. Are arranged on the same surface side with respect to the circuit board, and one terminal adjacent to each detection coil is electrically connected to each other, and the non-adjacent terminal of each detection coil is connected. Wherein the terminals electrically connected to the circuit board and the terminals electrically connected to the terminals of the other detection coils are arranged at a predetermined distance from the surface of the circuit board. 2. A state in which each terminal is projected from a side surface of a coil bobbin such that a plane including a pair of terminals of each detection coil is substantially parallel to a surface of a circuit board facing these terminals in a state where the terminals are arranged in a casing. The game ball detector according to claim 1, wherein the game ball detector is formed. 3. The game ball detector according to claim 1, wherein adjacent one terminals of the two detection coils are joined by soldering. 4. A casing having a through hole through which a game ball made of metal passes, two detection coils arranged side by side in the casing in close proximity to the through hole, and a high-frequency current flowing through each detection coil for detection. A circuit board for detecting that the play ball has passed through the passage hole based on a change in the impedance of the coil is mounted and a circuit board fixed at a fixed position in the casing, and the detection coil is provided on a coil bobbin made of an insulating material. The winding is wound, and both ends of the winding are formed by projecting a pair of terminals connected to one end from the same side surface of the coil bobbin, and the terminal projecting direction is substantially orthogonal to the normal direction of the circuit board surface. The two sensing coils are arranged side by side in the casing so that the inner terminals adjacent to the other sensing coils are electrically connected to each other while being arranged in the casing. The outer terminals that are not adjacent to the other detection coils are connected to the circuit board, and the outer terminals protrude from the approximate center of the width dimension along the normal direction of the circuit board on the side surface of the coil bobbin. A game ball detector characterized in that the inner terminal protrudes from a position displaced along the normal direction of the circuit board by about half the terminal diameter from the terminal. 5. A casing having a through hole through which a game ball made of metal passes, a detecting coil disposed in the casing in close proximity to the passing hole, a high-frequency current flowing through the detecting coil and an impedance of the detecting coil. A circuit board for detecting that the game ball has passed through the passage hole based on the change, and a circuit board fixed at a fixed position in the casing, and the detection coil is wound around a coil bobbin made of an insulating material. Turned and both ends of the winding project from the coil bobbin a pair of terminals respectively connected to one end,
A method for manufacturing a playing ball detector, wherein at least one terminal is soldered to a conductive portion formed on a surface of a circuit board, the method comprising: A method for manufacturing a game ball detector, comprising: performing soldering, and irradiating a light beam to a thread solder supplied from a side where the spare solder is not biased to solder-connect a terminal to a conductive portion.