JPH0517748Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a cash register, and is particularly directed to reducing sound reflected from the bottom case.

[Prior Art] As shown in FIG. 4, a conventional cash register is comprised of a drawer case 11 housing a cash drawer (not shown) and a printer 40 attached via a bottom case 30.

The bottom case 30 is fixed to the drawer case 11 with screws 39 that pass through the holes 38 and are screwed into the female screws 19 of the drawer case 11, and the printer 40 is fixed to the female screws 17 of the drawer case 11 that pass through the holes 36.
The bottom case 30 is attached by screws 37 screwed into the
It is fixed to the bottom case 30 via rubber feet 50, which are cushioning materials attached to the bottom case 30. printer 4
0 is attached by fitting the leg plate 42 into the groove 52 of the rubber foot 50. An air layer 21 is formed between the bottom case 30 and the drawer case 11 that are integrally attached in this manner.

That is, the structure is such that sounds generated by the printer 40, such as print hammer noise and paper scraping noise, are absorbed by using the viscous resistance of the rubber feet 50, which is originally intended to dampen vibrations.

[Problems to be solved by the invention] However, in the conventional cash register structure described above, the print hammer sound etc. generated by the printer 40 is transmitted to the bottom case 30 through the gap in the printer case, etc. There was a problem in that case 30 bounced back and produced a loud noise that was unpleasant to the operator's ears. It is considered that the bottom case 30 acts as a sound reflecting plate. Moreover, since the air layer 21 acts as a resonance box, the reflected noise is further amplified.

Furthermore, since the rubber feet 50 are configured to mechanically support the printer 40, they are necessarily highly hard, and are not necessarily effective in absorbing vibration noise. In addition, the introduction of rubber feet 50 and the like had disadvantages in terms of cost and assembly work.

Therefore, the present invention has been developed in view of the above points, and its purpose is to provide a cash register that can significantly reduce the reflection of noise generated by the printer toward the operator side. There is a particular thing.

[Means for Solving the Problems] This invention provides a cash register having a cash drawer and a printer attached to the drawer case of the cash drawer via a bottom case. The above object is achieved by providing a plurality of holes for communicating the air layer formed between the drawer case and the printer side space, and providing a coating material to close these holes.

[Function] In the present invention having the above configuration, when the noise emitted from the printer is transmitted to the coating material, the coating material generates minute vibrations due to the breathing action of the plurality of holes provided in the bottom case. At the same time, it absorbs incident sound through its sound-absorbing effect. Therefore, noise from the bottom case is not reflected back to the operator side.

[Embodiment] A preferred embodiment of the cash register according to the present invention will be described with reference to FIGS. 1 and 2.

In FIG. 1, the cash register is composed of a drawer case 11 that accommodates a cash drawer (not shown), a printer 40 that forms the main body, and a bottom case 30.
It is integrally fixed by.

In other words, the dot print type printer 40
Connect each leg plate 42 of the bottom case 30 to each hook 32 of the bottom case 30.
The printer 40 and the bottom case 30 are aligned and fixed integrally. At the same time, the three members 11, 30, and 40 are integrally fixed by passing the screw 37 through the hole 36 of the printer 40 and screwing it into the female screw 17 of the drawer case 11. As shown in FIG. 2, the outer surface 14 of the drawer case 11 and the inner surface 35 and edge 38 of the bottom case 30 form a sealed air layer 21.

If the configuration is the same as the conventional one, the outer surface 34 of the bottom case 30 will act as a reflective surface for the sound generated by the printer 40 and incident thereon, such as the print hammer sound, and will cause harsh noise to the operator. Further, the flat plate portion 33 of the bottom case 30 forms a diaphragm, and the sealed air layer 21 causes a resonance effect. These will further amplify the noise.

Here, the technical feature of the present invention is that the reflective surface formed by the outer surface 34 of the bottom case 11 is coated with a soft and flexible sound-absorbing or vibration-absorbing film material 25 made of vinyl chloride, rubber, or the like. The bottom case 30 is provided with a plurality of holes 31 passing through its outer surface 34 and inner surface 35 in order to allow minute vibrational displacement of the coating material 25. That is, the coating material 25 is aligned so that it can close each hole 31, and the coating material 25 is aligned so that it can close each hole 31.
1 is pasted and laid on the outer surface (upper surface) 34 of 1.
Further, the screw 37 is passed through the hole 26 of the coating material 25. Each of the holes 31 prevents the bottom case 11 from acting as a so-called diaphragm by reducing its reflective surface, and also serves to break the resonance box formed by the sealed air layer 21. .

Therefore, when the print hammer sound, paper scraping sound, or cartridge return sound of the printer 40 is transmitted to the outer surface 34 of the bottom case 30, the coating material 25
Since the gap C between the outer surface 34 of the bottom case 30 and the outer surface 34 of the bottom case 30 is communicated with the air layer 21 through the plurality of holes 31, the coating material 25 vibrates with a displacement of an amplitude Δy due to the absorption effect, as shown in FIG. . As a result, the sound generated from the printer 40 is absorbed by the coating material 25, and no reflected amplified and amplified sound is transmitted to the operator.

According to this embodiment, the bottom case 30 has a plurality of holes 31 and 3 communicating with the air layer 21.
1,... and the reflective surface (outer surface 34) formed by the bottom case 30 is provided with a sound-absorbing and vibration-absorbing coating material 25, so that the mechanical sound generated from the printer 40 is amplified and magnified by the reflective surface. The noise is absorbed by the sound absorbing effect of the membrane material 25 without causing noise, and noise in the middle and low range, which is unpleasant and harsh to the operator's ears, is not transmitted.

Furthermore, since the coating material 25 also indirectly absorbs the mechanical vibrations of the printer 40, there is no need to employ multiple rubber feet 5 as in the past, and the entire assembly can be easily performed with a single screw 37, reducing costs. can be reduced.

Furthermore, a plurality of holes 31 are provided in the bottom case 30 to allow vibrational displacement of the coating material 25.
This drastically reduces the diaphragm-like properties of the bottom case 30 itself and destroys the air layer 21, thereby eliminating any room for resonance effects. Also from this point of view, noise propagation can be further reduced.

In the above embodiment, the holes 31 for allowing the displacement of the coating material 25 were provided only in the bottom case 30, but if a plurality of holes 12 are also provided in the drawer case as shown in FIG. Case 11
Since the space 16 inside can also be used as a buffer for the air layer 21, the displacement of the coating material 25 can be further increased. This expands the degree of freedom in selecting the material of the coating material 25 and the hardness and softness of the coating material 25, and increases the flexibility of the printer 40.
This helps to ensure that the sound absorption effect can be achieved depending on the structure and type of the structure. Also, the number of holes 31,
The shape and drilling position can be arbitrarily selected. The same applies to the printing method and model of the printer 40.

[Effects of the invention] In the present invention, a sound absorbing film material that can vibrate and displace in cooperation with the communication with the air layer is provided on the reflective surface formed by the bottom case. Sound is absorbed and no harsh noises or noises are transmitted to the operator.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing an embodiment of a cash register according to the present invention, Fig. 2 is a sectional front view showing the main parts of the cash register, and Fig. 3 is a sectional front view showing the main parts of another embodiment. and FIG. 4 is a side sectional view of a conventional cash register. 11... Drawer case, 21... Air layer, 2
5... Film material, 30... Bottom case, 31...
Hole, 40...Printer.

Claims (1)

[Scope of Claim for Utility Model Registration] In a cash register having a cash drawer and a printer attached to a drawer case of the cash drawer via a bottom case, 1. A cash register characterized in that a plurality of holes are provided to communicate an air layer formed therebetween with the space on the printer side, and a film material is provided to close these holes.