MXPA03005846A - Coin returning device for public telephones and the like. - Google Patents

Abstract

The present invention refers to a coin returning device for public telephones and the like, which is characterized in that it comprises a detachable structure or a fastening front shield (2); a roller (4) that is mounted with a freedom of spin by means of a transversal axis (6) that is driven by a front tab (5). Said tab being useful for emerging a casing through a window (3) of the detachable structure or fastening front shield (2) over which the transversal axis (6) of the roller (4) spin is attached. The invention further comprising a trap useful for blocking the coin passage, which tilts over the casing due to the roller (4) and casing action (1); the two latter elements are assembled therebetween in such a manner that the play between the roller (4) and casing (1) is higher than that of the roller (4) and detachable structure or fastening front shield (2); the aforesaid avoiding the entrance of objects that may block the roller and the casing therebetween.

Description

CURRENCY DEVOLUTION DEVOLUTION FOR PUBLIC AND SIMILAR TELEPHONES OBJECT OF THE INVENTION The present invention relates to a device used in public telephones and the like, for returning coins to the user, both of coins not consumed, and coins rejected as defective. The object of the invention is to achieve a device that offers optimal performance from the point of view of security, making fraudulent manipulations in the telephone through it impossible. These manipulations are intended to block the return to prevent the user from recovering their coins, which are subsequently recovered by the fraudster.

BACKGROUND OF THE INVENTION In the preferred field of practical application of the invention, that of public telephones, coin return devices are used based on the typical and classic trapdoor system. This system has the disadvantage that the contact surface between the moving part and the fixed part that houses it is very large, which forces the use of small boxes, with the consequent practical difficulty that this entails for the users, who sometimes get stuck their fingers in the box, since the use of larger boxes brings with it the possibility of fraudulent manipulations on the phone through it.

DETAILED DESCRIPTION OF THE INVENTION The coin return device proposed by the invention solves in a fully satisfactory manner the problem described above, so that also using a trapdoor, as is conventional, said trap door is inaccessible to the user, since between it and the insert that is Fixed to the housing of the phone there is a roller that when it leaves free the front opening of the insert to access the coins is placed before the said trapdoor, closing and protecting it. More specifically, said roller, hollow and with a wide opening, is provided with a tongue for actuation thereof which also acts as a tilt limit stop for the roller. In a lower limit situation for said tongue, the roller closes the window of the frontal hairpiece of the device, making the latter inaccessible, at the same time that it releases the trapdoor allowing it to open so that the coins can access the interior of the device, whereas when the tongue is tilted upwards to open the window of the central hairpiece and the user can recover the coins, the roller acts on the trapdoor closing it and standing in front of it, specifically in a limit situation in which the trapdoor makes stop on lateral fins establishing an optimal closure.

In addition, the roller incorporates a lateral lug, which emerges to the outside through an arched groove established in one of the sides of the device's own housing, so that in each roll movement of the roller, that is to say in each access maneuver to the Inside the device, said pin affects an external control microswitch which, from a management system, allows controlling an anomalous situation in the box, such as for example that the trapdoor has been closed by blocking the roller. It would even be possible to act on the device, specifically on said roller, by simply adding an engine to control its movement.

BRIEF DESCRIPTION OF THE DRAWINGS To complement the description that is being made and in order to help a better understanding of the characteristics of the invention, according to a preferred example of practical realization thereof, an assembly of drawings is included as an integral part of said description. With an illustrative and non-limiting character, the following has been represented: Figure 1 shows an antera-lateral perspective view of a coin return device for public telephones or the like made in accordance with the object of the present invention, which appears in a situation of external closing and opening for the inner trapdoor. Figure 2 shows a side-rear perspective of the box of the previous figure, in the same situation. Figures 3 and 4.- They show representations similar to those of figures 1 and 2 but in the opposite position, that is to say with their front opening in an open position and their trapdoor closed. Figure 5 shows, finally, a representation similar to that of Figure 2 in which a coin drop ramp has been coupled to the interior of the device.

PREFERRED EMBODIMENT OF THE INVENTION In view of the figures outlined can be seen as the coin return device proposed by the invention is constituted from a housing (1), rigidly attached to a hairpiece or front shield (2), in which a window is established central (3) for access to the interior of the housing (1), window that is normally closed by a roller (4) provided with a tongue (5) manually operated and mounted with freedom of rotation on the housing (1) through of a transverse axis (6).

This roller (4) is open inferiorly to allow free access to the bottom of the casing (1) and through its rear edge faces a trapdoor (7), also rear, capable of sealing or not a rear window (8) of the casing (1), provided with lateral fins (9) on which said flap (7) abuts when closed and which avoids fraudulent access through the space between the roller (7) and the casing (1), as seen in particular in Figure 4. According to this structure and as seen in Figures 1 and 2, when the tongue (5) of driving the roller (4) is in the lower limit situation, and said roller ( 4) seals the front window (3), the rear edge of the roller (4) is distanced from the flap (7), and this, hingedly attached to the housing (1) through an upper tilt shaft (10), It tilts by simple gravity towards the opening situation shown in figure 2, so that the Onedas can access the interior of the box through the rear opening (8). When the user tries to access said coins by acting upwardly on the tongue (5), the rotation of the roller (4) first causes the actuation thereof on the trap (7), which passes to the closing situation shown in FIG. Figure 4, in which it rests on the side flaps (9), in which, furthermore, said flap is protected and stabilized by the roller (4) itself, firmly preventing access to the interior of the telephone.

In addition, the roller (4) incorporates a lateral lug (11) that emerges to the outside of the casing (1) through an arched groove (12), with a center of curvature located on the axis (6) of rotation of the roller (4). ), a microswitch (13) which is activated by the lug (11) in the closed position for the flap (7) interposing to the path of said lug (11), that is to say in the situation shown in figure 4, which must be temporary, corresponding exclusively to the time necessary to extract the coins from the interior of the box, so that if this situation were maintained unlawfully, for example due to a jamming of the roller (4), such situation could be detected by a external control system, to carry out an appropriate maneuver, such as locking the telephone until a maintenance worker unblocks the roller (4). As shown in Figure 5 to the rear area of the casing, in correspondence with the opening (8) for accessing the coins inside the cassette, a coin drop ramp (14), which favors the access of the coins, can be adapted. same through the opening (8) when the trapdoor (7) is open and that makes it possible to adapt it to different telephone models, without adding or modifying this element (14), while the rest of the set is not modified. Finally, the clearance between the insert (2) and the roller (4) is minimal, barely 0.4 mm in a preferred embodiment. The clearance, however, between the roller (4) and the housing (1) is large, approximately 2 mm. In this way, a blockage of the moving part is unfeasible: any instrument that you want to use to jam, will have to be less than 0.4 mm thick and when you penetrate more inside the device, you will find a clearance of 2 mm, so that blocking is not possible on that contact surface.

Claims (1)

1. NOVELTY OF THE INVENTION CLAIMS 1a.- Device for returning coins for public or similar telephones, comprising: a hairpiece or frontal fastening shield (2); A roller (4) mounted with freedom of rotation through a transverse axis (6) operable through a front tab (5) emerging through a window (3) of the front fastening shield or shield (2); a casing (1) on which the transversal axis (6) of rotation of the roller (4) is fixed; a trapdoor for blocking the passage of coins, swinging on the housing by the action of the roller (4); These elements are joined to each other in such a way that the clearance between the roller (4) and the casing (1) is greater than the clearance between the roller (4) and the insert or front shield (2). 2a.- Device for returning coins for public telephones or similar, according to claim 1, further characterized in that the front tab (5) acts as a tilt limit stop for the roller, between the upper and lower ends of the corresponding window of access to the interior of the box. 3a.- Device for returning coins for public telephones or similar, according to claim 1, further characterized in that the rear hatch (7) is mounted pivotably on an axis (10) located in correspondence with its upper edge, and in a situation of closure affects a pair of lateral fins (9) that frame the opening of the coins falling into the box. 4a.- Return device for public telephones or similar, in accordance with the previous claims, further characterized in that the roller (4) incorporates a side lug (11), emerging to the outside of the housing through an arched slot ( 12), concentric with the pivot axis of the roller itself, which in the closed position for the rear hatch acts on a microswitch that allows to detect remotely the closing situation of said hatch and an eventual blocking of the roller when said situation remains unduly . 5a.- Device for returning coins for public telephones or similar, in accordance with claim 3, further characterized in that it includes a motor for external control of the return device. 6a.- Return device for public telephones or similar, in accordance with the preceding claims, further characterized in that the casing (1) is capable of receiving, in correspondence with the rear access opening of coins inside the cassette, a collector ramp in the fall of said coins.