JPS6121745Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a mechanism for preventing continuous coin insertion, which has a function of preventing damage when coins are forced into the coin insertion mechanism of public telephones, vending machines, etc.

Generally, in public telephones, coins inserted into a telephone are sorted by appearance, thickness, material, etc., genuine coins are accumulated, and defective or deformed coins are returned. Inserting coins is likely to cause malfunctions, and therefore, it is necessary to prevent the next coin insertion until a series of processes such as sorting of previously inserted coins is completed.

The present invention was created in view of the above points, and its purpose is to constantly press the coin slot with a spring member so as to block the coin slot, and to place the tip of the inserted coin on the coin slot side. The shutter is formed with a coin insertion guide surface that applies a force in the direction of opening the insertion slot when engaged with the shutter, and the armature is energized by detecting the inserted coin in the coin orbit. A simple configuration with an electromagnet that restricts the movement of the shutter in the opening direction prevents continuous insertion of coins, and if the next coin is forcibly inserted either intentionally or by mistake, the electromagnet will stop. The present invention provides a coin insertion mechanism having a mechanism damage prevention function in which the shutter can be opened by moving the armature in the restoration direction with a force exceeding the suction force.

Hereinafter, details of the present invention will be explained using embodiments shown in the drawings.

Fig. 1 is a perspective view of a public telephone incorporating a coin insertion mechanism according to the present invention, Fig. 2 is a sectional view taken along the line - - in Fig. 1, and Fig. 3a is a plan view of the coin insertion mechanism according to the present invention. , FIG. 4B is a plan view of the same, and FIG. 4 is a partially cutaway perspective view of the same. In these figures, the reference numeral 1 denotes a housing body, and 2 denotes a front housing whose one end is rotatably supported on the housing body 1, and a front part 2a of this front housing 2. is provided with a dial part 3 and a coin return slot 4, and
A coin passage hole 2c through which a coin (not shown) passes is bored at a predetermined position of the inclined surface portion 2b. Further, the inclined surface portion 2b has a coin passage hole 2c.
A decorative board 5 is attached to cover the coin, and a coin slot 5a into which coins are inserted is formed approximately in the center of the decorative board 5.

On the other hand, a coin insertion mechanism 6 is disposed within the front casing 2 at a position continuous with the coin insertion slot 5a. That is, this coin insertion mechanism 6 is
A metal bracket 7 fixed to the back surface of the inclined surface portion 2b of the front casing 2 with a screw (not shown).
a lower plate 8 fixed to the bracket 7; an upper plate 10 disposed at a constant interval from the lower plate 8 and forming a coin track 9 together with the lower plate 8;
A synthetic resin spacer 11 is interposed between the upper plate 10 and the lower plate 8 to maintain a constant distance between the upper plate 10 and the lower plate 8 and forms a side wall of the coin track 9; It is slidably held by a guide portion 11a provided at the upper end of the spacer 11, and is normally pressed by a plate spring 12 fixed to the bracket 7 to close the coin insertion slot 5a, and is pressed so as to close the coin insertion slot 5a. On the side of the opening 5a, there is a coin insertion guide surface 1 that applies a force in the direction of opening the coin insertion opening 5a by engaging with the tip of the coin to be inserted.
Shutter 13 with 3a cut out, and support shafts 14, 1 installed at regular intervals on the upper plate 10.
A cylindrical protrusion 1 is rotatably supported on the coin track 9 and protrudes into the coin track 9 through a guide hole 10a formed in the upper plate 10 on its open end side.
Coin introduction levers 16, 17 with 6a, 17a
, a spring 18 suspended between the coin introduction levers 16 and 17 and always urging the coin introduction levers 16 and 17 toward each other; and a core 19.
It consists of an excitation coil 20, an armature 21, a coil spring 22, etc., and the upper plate 10 and the lower plate 8.
The electromagnet 23 is fixed to the grip portion 71 of the bracket 7, where other members such as the electromagnet 23 are not located.

The coin insertion mechanism 6 according to the present embodiment is configured as described above. To explain this in more detail, the bracket 7 is formed to have a U-shaped cross section so as to hold the electromagnet 223. A grip part 71;
A fixing part 72 provided on one end side of the grip part 71 and fixed to the inclined surface part 2b of the front casing 2
and a mounting part 73 which is provided at right angles to the fixing part 72 and whose upper end part 731 is bent into an L-shape. Further, the lower plate 8 is fixed to the mounting portion 73 of the bracket 7 with screws 24, and is maintained at a constant distance from the upper plate 10 via the spacer 11.
Further, the guide portions 11a of the spacer 11 are provided at both ends of the shutter 13, and the protrusion portions 11a are provided at both ends of the shutter 13.
3b into which the guide portion 11a can be inserted, and the side wall 11b constituting the guide portion 11a is bent inward on the side closer to the upper plate 10, so that the planar shape has a substantially L-shape. It is showing. Due to the presence of the bent end 11c of the side wall 11b, the projection 13b of the shutter 13 is restricted from moving toward the top plate 10, and the projection 113b is in contact with the bent end 11c. In this state, a slight gap smaller than the thickness of the coin is provided between the coin input port side of the shutter 13 and the top plate 10. The coin insertion guide surface 13a provided on the shutter 13 is provided by cutting the upper corner on the coin insertion slot side into a concave curved shape. Due to this presence, the coins inserted from the coin slot 5a slide on the coin slot guide surface 13a and are smoothly guided into the coin track 9. Note that the shutter 13
The gap between the shutter 13 and the top plate 10 is formed to be smaller than the thickness of the coin, but when the coin slides on the coin insertion guide surface 13a and enters the gap between the shutter 13 and the top plate 10, Therefore, the shutter 13 moves in the opposite direction to the upper plate 10, that is, in the opening direction, so that the coin can smoothly enter the coin track 9.

Coin introduction levers 16 and 17 are rotatably supported on support shafts 14 and 15 provided upright on the upper plate 10.
are protrusions 16a and 17 provided on the open end side.
By engaging the guide hole 10a formed in the upper plate 10, the upper plate 10 is configured to be able to freely rotate within the range of the guide hole 10a.
Furthermore, the protrusions 16a and 17a protrude into the coin track 9 through the guide hole 10a, and their tips reach the position of the lower plate 8,
It is suspended horizontally between the upper plate 10 and the lower plate 8. Further, although the distance between the protrusions 16a and 17a is normally formed to be smaller than the diameter of the coin, when the protrusions 16a and 17a are in contact with the outer end 10b of the guide hole 10a,
In other words, in the fully opened state, the diameter is larger than the diameter of the coin. That is, the distance between the protrusions 16a and 17a is
Coin slot 5a as shown in Figures 5 and 6
A coin 25 is inserted into the protrusion 16a, 1.
When the contact position of the coin 25 with respect to the coin 7a reaches the center point of the length of the coin 25 in the insertion direction, it opens to the maximum extent against the elasticity of the spring 18. Orbit 9
By applying force to push the coin 25 inward, when the contact point slightly passes the center point, the coin 25 is caused by the elastic return force of the spring 18 to return to its original state. , so that it automatically enters into the coin track 9.

Note that a cutout window 26 is provided at the lower end portions of the upper plate 10 and the lower plate 8 at positions facing each other, and a bent tongue piece (FIG. (not shown) is equipped with a detector 27 for detecting passage of the coin.

On the other hand, to explain in detail the configuration of the electromagnet 23 fixed to the gripping part 71 of the bracket 7, it includes a frame 29 fixed to the gripping part 71 with a screw 28, and one end supported by the frame 29. A fixed core 19, a bobbin 30 fitted onto the core 19, and an excitation coil 20 wound around the bobbin 30 are pivotably supported on the frame 29, and the surface thereof is It consists of an armature 21 arranged to face the core 19, and a coil spring 22 that always biases the armature 21 in the opposite direction to the core 19.

Also, a bracket 7 is attached to the armature 21.
A lever portion 211 is provided extending toward the mounting portion 73 of the shutter 13, and the open end 211a of this lever portion 211 is located behind the shutter 13, that is, when the electromagnet 23 is not energized. When the armature 21 is energized, the armature 21 is attracted to the core 19, and its open end 211a moves in the closing direction of the shutter 13 and comes into contact with the rear thereof. It is configured to restrict movement of the shutter 13 in the opening direction.

An outline of the operation after coin insertion in this embodiment with the configuration described in detail above is as follows.

1 Coin insertion 2 Detector 27 detects passage of coin and communicates to control circuit (not shown) 3 Control circuit commands energization to electromagnet 23 (attraction) 4 Late arrival of coins 5 Accumulation of genuine coins or return of defective coins 6 Detection of accumulation and return 7 Restoration command from the control circuit to the electromagnet 23 (recovery) 8 Preparation for next coin insertion completed Therefore, the electromagnet 23 remains energized until a series of processes such as sorting the inserted coins are completed. ,
Since the movement of the shutter 13 is restricted by the open end 211a of the lever portion 211 extending from the armature 21, it is possible to prevent coin insertion by normal force.

However, in the electromagnet 23, the next coin is inserted into the shutter 1 from the coin slot 5a.
3 and the upper plate 10 with a force above a certain level, in other words, with a force exceeding the attraction force of the electromagnet 23, the armature 21, that is, the lever part 211 moves in the recovery direction, and Therefore, damage to this mechanism is prevented when a coin is forced into the shutter 13 even though its movement is restricted.

As a precaution, the time required for a series of processes such as sorting is usually about 500 msec to 1 second.
If the attraction force of the electromagnet 23 is set above a certain level, the operation can be completed within the time required to push in the next coin against the attraction force. Furthermore, even if the next coin is inserted into the mechanism while the electromagnet 23 is energized, in other words, during a series of processing such as sorting, it is sufficient to guide it to the return slot as is known. This not only makes the user aware that the next coin is prohibited from being inserted, but also prevents the mechanism from being damaged if the coin is forced in.

As explained above, according to the present invention, continuous insertion of coins is prevented in a coin insertion mechanism of a public telephone, a vending machine, etc. by a shutter whose movement is restricted by an armature attracted and energized by an electromagnet. In addition, in the event that the user tries to forcefully insert coins continuously, the armature can be moved in the recovery direction against the attraction force of the electromagnet, so that the coin inserting mechanism will not be directly affected by the excessive force. This has the effect that damage to the structure can be reliably prevented.

Additionally, according to the present invention, the coin slot is closed by the shutter except when coins are being inserted, which has the effect of reliably preventing the intrusion of insects, dust, etc. has.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a public telephone incorporating a coin insertion mechanism according to the present invention, Fig. 2 is a sectional view taken along the line - - in Fig. 1, and Fig. 3a is a plan view of the coin insertion mechanism according to the invention. , FIG. 4 is a partially cutaway front view of the same, and FIGS. 5 and 6 are explanatory diagrams of the same operation. 5a... Coin slot, 6... Coin slot mechanism, 1
2... Leaf spring, 13... Shutter, 13a...
Coin insertion guide surface, 21... Armature, 2
3...Electromagnet.

Claims (1)

[Scope of utility model registration request] A shutter which is disposed on the back side of the coin slot to be movable in a direction perpendicular to the coin slot and which is supported by a spring member so as to normally close the coin slot, and the direction of movement of the shutter. an armature whose operating end is movable back and forth and is normally located at a certain distance from the shutter and which contacts the shutter to restrict its movement during operation; and an armature which detects an inserted coin in the coin trajectory. and an electromagnet that is energized to move the armature in the closing direction of the shutter, and a coin slot on the coin slot side of the shutter that moves the shutter in the opening direction by engaging with the tip of the coin inserted. A coin insertion mechanism characterized by having a guide surface formed thereon.