JPH0340830Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a paper size detection mechanism for a paper cassette case that stores cassettes of paper.

[Prior Art] A conventional paper size detection mechanism will be explained with reference to FIG. The drawing is a perspective view of the main part, and in the figure 1
1 is a cassette case, and 2a, 2b, and 2c are convex portions protruding from the tips of the cassette cases, and are designed to correspond to the size of paper stored in each cassette case 1. 3 is the above convex portion 2
These protrusions are arranged side by side on a, 2b, and 2c, and are designed to notify that the cassette case 1 has been stored in the device.

4a, 4b, 4c are micro switches installed in the device, which correspond to the projections 2a, 2b, 2c, so that when the cassette case 1 is inserted into the device, the microswitches The printer is operated to detect the paper size.

5 is also a micro switch installed in the device, which corresponds to the above protrusion 3, and is operated by the protrusion 3 when the cassette case 1 is inserted to detect the insertion of the cassette case. ing. A time chart of the above operations is shown in FIG.

[Problem that the invention attempts to solve]

According to the above configuration, the sequence in which the microswitches are turned on differs depending on how the microswitches are installed, so all microswitches that should be pressed are turned on when the internal program detects the ON status of the microswitches. It is necessary to guarantee the time until

In addition, since the amount of movement after the micro switch is activated is small due to the structure of the micro switch, even if the set state of the cassette case is slightly shifted due to vibration or external force, the micro switch will be activated.
There were times when the power went off, causing functional problems.

[Means for solving problems]

The present invention provides a paper size detection mechanism for a cassette case for feeding cut paper, which includes a plurality of first microswitches for detecting the paper size of the cut paper in the cassette case, and a mechanism for inserting the cassette case into the apparatus. A second micro switch for detecting the cassette case is arranged in the same line in the direction perpendicular to the insertion direction of the cassette case, and
The first and second protrusions are arranged integrally on the side surface of the cassette case and on the same line in a direction perpendicular to the insertion direction of the cassette case, and the first and second protrusions The second protrusion is made long in the insertion direction to ensure the operation of the first and second microswitches when the cassette case is inserted into the device, and the second protrusion that operates the second microswitch is made long. It is characterized in that it is located rearward in the insertion direction of the cassette case from the position of the first protrusion that activates the first micro switch.

[Effect]

According to the above configuration, when a cassette case containing a predetermined amount of paper is inserted into the device, the protrusion for detecting the paper size first activates the corresponding microswitch to notify the paper size, and then the protrusion for detecting insertion operates the corresponding microswitch. It is detected by activating a micro switch.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. Figure 1 is a perspective view of the main parts of the cassette case, Figure 4
The figure is a perspective view showing the state of the protrusion of the cassette case and the micro switch, and FIG. 5 is a plan view showing the state of the protrusion of the cassette case and the micro switch.
The protrusions b and 6c are attached to the side of the cassette case, and their tips are sloped so as not to get in the way of insertion, and are long in the insertion direction to ensure the operating time of the micro switch described later. A plurality of protrusions are combined so that the paper size can be determined by the combination of the presence or absence of the protrusions 6a, 6b, and 6c.

7 is a protrusion formed integrally with the protrusions 6a, 6b, 6c, and the tip of the protrusion 7 is positioned rearward with respect to the tips of the protrusions 6a, 6b, 6c as shown in FIG. The tip of the above protrusion 6
Like a, 6b, and 6c, it is formed obliquely, and the length of the rear part is maintained in the insertion direction to ensure the operating time of the micro switch described later.

4a, 4b, 4c are the projections 6a, 6b, 6c
This is a microswitch installed on the main body of the device corresponding to the paper size, and is used to detect the paper size. 5 is a micro switch provided on the main body of the device corresponding to the protrusion 7, and the cassette case 1
This is to detect the insertion of.

The operation of this embodiment with the above configuration is that when the cassette case 1 is inserted into the device, the protrusions 6a, 6b, 6c first actuate the corresponding micro switches 4a, 4b, 4c to remove the paper. Detect size. When the cassette case 1 is further inserted, the micro switch 5 is actuated by the protrusion 7 to detect the insertion of the cassette case 1 into the apparatus. The protrusions 6a, 6b, 6c, and 7 maintain the ON state of the microswitches 4a, 4b, 4c, and 5 even if the cassette case 1 vibrates to some extent in order to stabilize the operation of the microswitches 4a, 4b, 4c, and 5. It is formed to be long in the insertion direction of the cassette case 1 so as to obtain the desired length. And protrusion 7 is protrusion 6
a, 6b, 6c are micro switches 4a, 4b,
After activating 4c, micro switch 5 is activated with a delay.
Further, as shown in FIG.
The setting of the device into the predetermined position within the device is completed only by inserting the device. Even when the cassette case 1 is fully set, the projections 6a, 6
b, 6c and 7 are each micro switch 4a, 4
b, 4c and 5 are kept in operation. A time chart of the above operation is shown in FIG.

[Effect of idea]

According to the present invention described above, the first micro switch for detecting the paper size of the cut paper in the cassette case and the second micro switch for detecting the insertion of the cassette case into the device are arranged in the direction of insertion of the cassette case. The first and second protrusions are disposed in the device in the same line in the direction perpendicular to the microswitch, and the first and second protrusions are integrally disposed on the side surface of the cassette case so as to be in positions to respectively actuate the first and second microswitches. Furthermore, the second protrusion that operates the second microswitch is located rearward in the insertion direction of the cassette case from the position of the first protrusion that operates the first microswitch, and By increasing the length of the protrusion to ensure time by a predetermined length and operating the microswitch while inserting the cassette case, the following effects can be obtained.

When the micro switch that detects that the cassette case is inserted into the device is turned on, the micro switch that identifies the paper size must be activated.
This means that when the micro switch that detects that a cassette case is inserted turns on, the micro switch for paper size identification can be detected immediately, which was previously not necessary. This eliminates the need for time guarantees in internal programs.

In addition, since the micro switch that detects that the cassette case has been inserted is turned on, a predetermined insertion length can be obtained, which has the effect of preventing malfunctions due to vibration or external force on the cassette case. .

Furthermore, the method for mounting the microswitch having the above effects is simple and has the advantage that it can be concentrated in one place.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the main parts of a cassette case showing an embodiment of the present invention, Fig. 2 is a perspective view of main parts of a conventional example, Fig. 3 is a time chart according to the conventional example, and Fig.
The figure is a perspective view of the main part of this embodiment, FIG. 5 is a plan view showing the state of the protrusion of the cassette case and the microswitch, and FIG. 6 is a time chart. 1...Cassette case, 4a, 4b, 4c...
Micro switch, 5...Micro switch, 6
a, 6b, 6c... protrusion, 7... protrusion.

Claims (1)

[Scope of Claim for Utility Model Registration] In a paper size detection mechanism of a cassette case for feeding cut paper, a plurality of first microswitches for detecting the paper size of the cut paper in the cassette case and a device of the cassette case. A second microswitch for detecting insertion into the cassette case is arranged in the same line in a direction perpendicular to the insertion direction of the cassette case, and is in a position to operate the first and second microswitches. The first and second protrusions are arranged integrally on the side surface of the cassette case and on the same line in the direction perpendicular to the insertion direction of the cassette case, and the first and second protrusions are arranged so that the cassette case is inserted into the device. The second microswitch is made long in the insertion direction to ensure the operation of the first and second microswitches in the inserted state, and the second microswitch operates the second microswitch.
A paper size detection mechanism characterized in that the protrusion is located rearward in the insertion direction of the cassette case from the position of the first protrusion that activates the first micro switch.