JP4786991B2 - Printer and measuring device - Google Patents

Description

  The present invention relates to a printer including a support plate that supports an insertion shaft that is inserted into a central portion of a roll paper for printing, a printing unit that performs printing on the roll paper, and a measuring device including the printer. It is about.

As this type of printer, a printer disclosed in Japanese Patent Laid-Open No. 2001-192153 is known. This printer is configured to be able to set a paper feed magazine that can accommodate roll paper (recording paper roll), and this paper feed magazine supports paper holder devices fitted to both ends of the roll paper core. A roll support frame is attached. In this case, the support surface of the roll support frame is formed with a slit composed of a vertical portion into which the shaft support portion of the paper holder device is inserted and an inclined portion that is inclined with respect to the vertical portion (insertion direction of the shaft support portion). The paper holder device is supported by inserting the shaft support portion into the slit.
JP 2001-192153 A (page 3-5, FIG. 6)

  However, when the above printer is attached to a measuring device, for example, the following problems arise. That is, in the paper feed magazine of this printer, the slit for inserting the shaft support portion of the paper holder device is composed of a vertical portion and an inclined portion. In this case, when the roll paper becomes lighter as the remaining amount decreases, the roll part of the roll paper may be slid to the vertical part side along the slit along with the shaft support part by pulling out the roll paper by the printer. Here, this type of measuring device generally has a normal posture with the display unit facing forward (hereinafter also referred to as “upright posture”) and a posture with the display unit facing upward (hereinafter referred to as “side-down posture”). It can be used in two postures. In this case, for example, when the printer is attached to the measuring device so that the vertical portion is facing upward in the upright posture, the vertical portion is turned sideways (horizontal) when the measuring device is used in the lying position. . Therefore, in this printer, when the measuring device is used in a lying position, the roll paper that has become lighter due to the decrease in the remaining amount is slid to the vertical portion side of the slit together with the shaft support portion of the paper holder, and is turned sideways. However, there is a problem in that there is a possibility that the print may be hindered from the vertical portion.

  The present invention has been made in view of such problems, and a main object of the present invention is to provide a printer and a measurement apparatus that can reliably prevent the insertion shaft inserted into the roll paper from falling off the support plate.

In order to achieve the above object, in the printer according to claim 1, an insertion shaft that is inserted through the center of the roll paper for printing and a slit that can be inserted through the end of the insertion shaft are provided from the edge to the center thereof. A pair of support plates that respectively support the respective end portions that are formed through the slits, and a print unit that performs print processing on the roll paper while pulling out one end side of the roll paper. and a printer, wherein the slits before Symbol a first straight portion formed in a central portion, is formed by connecting the front Symbol the edge side of the first linear portion Rutotomoni the edge side of the end portion To the end of the connecting portion side with the first straight portion from the second straight portion formed so as to be close to the print portion, and connected to the edge side of the second straight portion. A third straight portion, and pulling the roll paper A virtual straight line along the pull-out direction, a virtual straight line along the first straight line portion, and a virtual straight line along the second straight line portion constitute a first virtual triangle, and the virtual straight line along the pull-out direction; The virtual straight line along the pull-out direction and the first straight line part when the second virtual triangle is configured by the virtual straight line along the second straight line part and the virtual straight line along the third straight line part The first straight line portion is formed so that the inner angle of the first virtual triangle sandwiched between the virtual straight line along the first line and the second straight line part extends along the pull-out direction. The second straight line portion is formed so that the inner angle of the first virtual triangle sandwiched between the virtual straight lines forms an acute angle, and the virtual straight line along the pull-out direction and the virtual straight line along the third straight line portion, The inner angle of the second virtual triangle sandwiched between The third straight portion is formed so as to form a.

The printer of claim 2, in the printer according to claim 1 Symbol mounting, provided with the support plate outside of the disposed a plate-shaped elastic member to a position of so as to face an outer surface of said support plate, said The elastic member contacts the end in a state where the end of the insertion shaft is located on the edge side of the slit, and the end in a state where the end is located on the center side. A convex portion that is separated from the portion is provided on the tip side.

According to a third aspect of the present invention, there is provided a measuring apparatus comprising: the printer according to the first or second aspect; and a measuring unit that measures an electrical parameter of an input signal, wherein the printer measures the electrical measured by the measuring unit. Print processing is executed based on the parameters.

According to the printer of claim 1 and the measuring apparatus of claim 3 , the first straight portion formed so as to form an acute angle with respect to the roll paper drawing direction, and the acute angle with respect to the direction opposite to the drawing direction. For example, the printer is used in a normal posture (upright posture) by forming a slit on the support plate with the second straight portion formed so as to be connected to the first straight portion. In the state, even if the roll paper that has become lighter as the remaining amount decreases is slid to the edge side of the support plate along the first linear portion together with the insertion shaft by the drawer, the first linear portion and the first linear portion Since the end portion of the insertion shaft can be brought into contact with the corner portion with the two straight portions, further sliding of the roll paper and the insertion shaft can be reliably regulated. In addition, even when the roll paper becomes lighter as the remaining amount decreases in the state where the printer is used in the sideways position (side down position), the same as in the upright position, By causing the end portion of the insertion shaft to contact the corner portion of the first straight portion and the second straight portion, further sliding of the roll paper and the insertion shaft can be reliably controlled. Therefore, according to the printer and the measuring apparatus, it is possible to reliably prevent the insertion shaft inserted into the roll paper from dropping from the support plate.

Further, by forming the slit comprises a third linear portion formed by connecting the second linear portion so as to form an acute angle to the direction out can pull, for example, using the printer in its side position In the state, even if the drawing of the roll paper is stopped by the end of printing and the insertion shaft slides downward along the second linear portion, the insertion shaft is inserted into the corner portion between the second linear portion and the third linear portion. Can be brought into contact with each other. For this reason, the slide beyond the insertion shaft can be reliably regulated. As a result, even in this state, the insertion shaft can be reliably prevented from falling off the support plate.

According to the printer of claim 2 and the measuring apparatus of claim 3 , the end of the insertion shaft is in contact with the end in the state where the end of the insertion shaft is located on the edge side of the support plate in the slit, and the end is In the state where the slit is positioned on the center portion side of the support plate, the elastic member is formed by providing the protrusion on the tip portion side, which is separated from the end portion, for example, at the end of the immediately preceding print process. The end of the insertion shaft is supported by the corners of the straight portion and the third straight portion, and the roll paper and the insertion shaft slide to the edge side of the support plate along the third straight portion by the start of the printing process. Even if this occurs, even if such a state occurs as a result of the movement of the end of the support plate toward the edge side of the support plate relative to the position of the projection, even if such a state occurs, the insertion shaft from the support plate To prevent the falling out of Kill.

  Hereinafter, the best mode of a printer and a measuring apparatus according to the present invention will be described with reference to the accompanying drawings.

  First, the configuration of the waveform measuring apparatus 1 will be described with reference to the drawings.

  A waveform measurement apparatus 1 shown in FIG. 1 is an example of a measurement apparatus according to the present invention, and includes a measurement unit 2 (see FIG. 2), a display unit 3, an operation unit 4, and a printer 5. The waveform measuring apparatus 1 includes a substantially rectangular parallelepiped casing 10, in which the measuring unit 2 and the printer 5 are housed, and the display unit 3 and the operation unit 4 are provided on the front panel 10 a of the casing 10. It is arranged. Further, an opening (not shown) for pulling out an end portion of a roll paper 100 (see FIG. 3) sent out from the printer 5 is formed on the top surface 10b (see FIG. 2) of the housing 10. ing. As shown in FIG. 2, the top surface 10 b is configured to be openable and closable with an end portion on the back surface 10 d side as a fulcrum, and functions as a cover of the printer 5. The waveform measuring apparatus 1 has a posture with the display unit 3 facing forward (upright posture) as shown in FIGS. 1 and 2 and a posture with the display unit 3 facing upward (side-down posture) as shown in FIG. In order to enable use in two postures, for example, a rubber insulator 31 having an anti-vibration function and an anti-slip function is attached to the bottom surface 10c and the back surface 10d of the housing 10.

  In accordance with the operation signal output from the operation unit 4, the measurement unit 2 measures the electrical parameter of the measurement target signal input from the outside, and outputs measurement data. For example, the display unit 3 is configured by an LCD panel and displays a waveform based on measurement data output from the measurement unit 2 in accordance with an operation signal output from the operation unit 4. As shown in FIG. 1, the operation unit 4 includes various switches and dials, and outputs an operation signal corresponding to the operation of the switches and dials.

  As shown in FIGS. 3 and 4, the printer 5 includes a base portion 11, a print portion 12, an insertion shaft 13, a pair of support plates 14 and 14, and a pair of shaft pressers 15 and 15. In order to facilitate understanding of the invention, the illustration of the shaft retainer 15 is saved in FIG. 4 and FIGS. The base portion 11 is formed, for example, by bending a metal plate, and is configured to be attachable to the upper part (the top surface 10b side) inside the housing 10. The printing unit 12 is attached to the base unit 11 and rolls waveforms, characters, and the like based on the measurement data output from the measurement unit 2 while pulling out the end of the roll paper 100 in accordance with the operation signal output from the operation unit 4. Print on paper 100. For example, the insertion shaft 13 is formed in a cylindrical shape with resin, and is inserted into the center of the roll paper 100 to hold the roll paper 100 rotatably.

  For example, the support plate 14 is formed in a rectangular plate shape with metal and is erected on the base portion 11 so as to face each other as shown in FIG. 3. Further, as shown in FIG. 4, the support plate 14 is formed with a slit 21 that is slightly wider than the diameter of the end portion 13a of the insertion shaft 13 from the edge portion 14a to the central portion 14b. In this case, the slit 21 has a function of guiding the inserted end portion 13a from the edge portion 14a to the central portion 14b and supporting the end portion 13a. As shown in FIG. 4, the slit 21 includes a straight portion 22a, a straight portion 22b, and a straight portion 22c, and is formed in a zigzag shape as a whole. Here, the straight line portion 22a corresponds to the first straight line portion in the present invention, and the drawing direction in which the roll paper 100 is pulled out by the print unit 12 (the direction of arrow A shown in FIG. 7 and the direction of arrow C shown in FIG. 7). ) Is formed in the central portion 14b of the support plate 14 so as to form an acute angle (for example, 45 ° or approximately 45 °). The straight portion 22b corresponds to the second straight portion in the present invention, and has an acute angle (one example) with respect to the direction opposite to the pull-out direction (the direction of arrow B shown in FIG. 4 and the direction of arrow D shown in FIG. 7). 45 ° or substantially 45 °), and is formed so as to be connected to the edge portion 14a side of the linear portion 22a. The straight portion 22c corresponds to the third straight portion in the present invention, and is connected to the edge portion 14a side of the straight portion 22b so as to form an acute angle (45 ° or substantially 45 ° as an example) with respect to the pulling direction. In addition, it is formed so as to communicate with the edge portion 14a.

  The shaft retainer 15 corresponds to an elastic member in the present invention. For example, by bending a metal plate having elasticity, a convex portion 15a is integrally formed on the tip end side (upper side in FIG. 3), and is substantially rectangular as a whole. It is configured. Further, as shown in the figure, the shaft retainer 15 is erected (disposed) at a position outside the support plate 14 in the base portion 11 so as to face the outer surface of the support plate 14. In this case, the shaft retainer 15 has the convex portion 15a that contacts the end portion 13a in a state where the end portion 13a of the insertion shaft 13 is inserted through the slit 21 of the support plate 14 and is positioned on the edge portion 14a side of the support plate 14. In addition, the standing position is defined so that the convex portion 15a is separated from the end portion 13a in a state where the end portion 13a is located on the center portion 14b side of the support plate 14.

  Next, the operation of the waveform measuring apparatus 1 will be described with reference to the drawings.

  When using the waveform measuring apparatus 1, the top surface 10 b of the housing 10 is opened with the waveform measuring apparatus 1 in an upright posture, and the roll paper 100 is set in the printer 5. Specifically, first, the insertion shaft 13 is inserted through the central portion (center hole) of the roll paper 100. Next, both end portions 13 a of the insertion shaft 13 are inserted into the linear portion 22 c of the slit 21 from the edge portion 14 a side of the support plate 14. At this time, the insertion shaft 13 (the roll paper 100 through which the insertion shaft 13 is inserted) is pushed down obliquely downward along the straight line portion 22c formed so as to form an acute angle with respect to the drawing direction of the roll paper 100. . In this case, the shaft retainer 15 is more easily elastically deformed by pushing down the insertion shaft 13 obliquely downward than in the configuration in which the insertion shaft 13 is pushed down directly. Therefore, the insertion shaft 13 is inserted into the linear portion 22c with a slight force. It can be inserted. Next, the insertion shaft 13 in which the end portion 13a is inserted into the straight portion 22c is guided by the roll paper 100 and the insertion shaft 13 to the straight portion 22a via the straight portion 22c and the straight portion 22b. Then, as shown in FIG. 4, the linear portion 22 a is supported at the end portion on the central portion 14 b side of the support plate 14. Thereby, the setting of the roll paper 100 is completed.

  Next, for example, when measuring an electrical parameter (voltage as an example) of an input signal, the operation unit 4 is operated to set measurement conditions, and then the measurement unit 2 starts measurement. At this time, for example, the measurement unit 2 samples an input signal and outputs measurement data regarding the voltage. Subsequently, the display part 3 displays the waveform based on measurement data by performing a display process. Subsequently, when the waveform of the measured voltage is printed on the roll paper 100, the operation unit 4 is operated to cause the printer 5 to start printing. At this time, the printing unit 12 of the printer 5 executes the printing process to pull out the end portion of the roll paper 100 to the front panel 10a side (the arrow A side shown in FIG. 4) of the housing 10, and the measurement unit 2 A waveform based on the measurement data output from is printed on the roll paper 100. Further, the printing unit 12 sends the end of the printed roll paper 100 to the opening side formed on the top surface 10 b of the housing 10. Thereby, the edge part of the roll paper 100 printed by the printing part 12 is pulled out from an opening part. In this case, since the shaft retainer 15 is erected on the outer side of the support plate 14, the movement of the insertion shaft 13 in the length direction is restricted by the lower portion of the projecting portion 15 a of the shaft retainer 15.

  Here, for example, as shown in FIG. 5, when the roll paper 100 becomes light as the remaining amount decreases, the roll paper 100 is pulled out by the print unit 12 being pulled out to the front panel 10 a side. The insertion shaft 13 and the slit 21 may be slid along the straight portion 22a toward the edge portion 14a of the support plate 14 (in the drawing direction of the roll paper 100). In this case, in the printer 5, a straight portion 22b that forms an acute angle with respect to the direction opposite to the direction in which the roll paper 100 is pulled out is formed to be connected to the edge portion 14a side of the straight portion 22a. For this reason, even if the roll paper 100 and the insertion shaft 13 are slid, the end portion 13a of the insertion shaft 13 comes into contact with the corner portions of the straight portions 22a and 22b as shown in FIG. Further sliding of the paper 100 and the insertion shaft 13 is restricted.

  Next, when the printing unit 12 of the printer 5 finishes the printing process, the drawing of the roll paper 100 by the printing unit 12 is stopped. At this time, the roll paper 100 and the insertion shaft 13 slide downward along the straight portion 22a due to their own weight, and are supported by the end portion of the support plate 14 on the central portion 14b side in the straight portion 22a.

  On the other hand, as described above, the waveform measuring apparatus 1 is configured to be usable in two postures of an upright posture and a sideways posture. For this reason, for example, when the measurement location is suitable for a usage pattern in which the display unit 3 is viewed from above, as shown in FIG. 6, it is possible to perform measurement in a lying posture with the display unit 3 facing upward. Yes. In this case, when the printer 5 is caused to execute a printing process in this sideways posture, the printing unit 12 of the printer 5 performs measurement while pulling the end of the roll paper 100 upward (in the direction of arrow C shown in FIG. 7). A waveform based on the measurement data output from the unit 2 is printed on the roll paper 100.

  Here, for example, as shown in FIG. 8, when the roll paper 100 becomes light as the remaining amount decreases, the roll paper 100 is inserted into the insertion shaft by the pulling of the roll paper 100 upward by the print unit 12. 13 may be slid to the edge portion 14 a side of the support plate 14 along the straight portion 22 a of the slit 21. In this case, even if the roll paper 100 and the insertion shaft 13 are slid, the end portion 13a of the insertion shaft 13 comes into contact with the corner portion of the straight portion 22a and the straight portion 22b in the same manner as the operation in the upright posture. Therefore, further sliding of the roll paper 100 and the insertion shaft 13 is restricted. For this reason, the drop-off of the insertion shaft 13 from the support plate 14 is reliably prevented.

  Next, when the printing unit 12 of the printer 5 finishes the printing process, the drawing of the roll paper 100 by the printing unit 12 is stopped. At this time, the roll paper 100 and the insertion shaft 13 slide downward along the straight portion 22a due to their own weight, and are supported by the end portion of the support plate 14 on the central portion 14b side in the straight portion 22a. In this case, in the printer 5, a straight portion 22 c that forms an acute angle with respect to the drawing direction of the roll paper 100 is formed to be connected to the edge portion 14 a side of the straight portion 22 b. Therefore, as shown in FIG. 9, for example, even if the roll paper 100 and the insertion shaft 13 slide downward along the straight portion 22b, the corners of the straight portion 22b and the straight portion 22c As a result of the end portion 13a abutting and the insertion shaft 13 being supported at that position, even in this state, the insertion shaft 13 is prevented from dropping off from the shaft retainer 15.

  Next, when the printer 5 is caused to execute the printing process again, the printing unit 12 of the printer 5 pulls the end of the roll paper 100 upward (in the direction of the arrow C shown in FIG. 9) and from the measurement unit 2. A waveform based on the output measurement data is printed on the roll paper 100. In this case, the insertion shaft 13 in which the end portion 13a is supported by the corner portion of the straight portion 22b and the straight portion 22c moves upward along the straight portion 22b together with the roll paper 100, and the straight portion 22a and the straight portion. The end 13a of the insertion shaft 13 abuts at the corner with 22b, and the insertion shaft 13 is supported at that position. On the other hand, in this printer 5, the shaft retainer 15 stands up so that the convex portion 15 a contacts the end portion 13 a in a state where the end portion 13 a of the insertion shaft 13 is positioned on the edge portion 14 a side of the support plate 14 in the slit 21. It is installed. For this reason, for example, at the end of the immediately preceding print process, as shown in the figure, the end part 13a of the insertion shaft 13 is supported by the corners of the straight line part 22b and the straight line part 22c, and the print process starts. As a result, even if the roll paper 100 and the insertion shaft 13 are slid upward along the linear portion 22c, the movement of the end portion 13a above the position of the convex portion 15a is restricted by the convex portion 15a. Further, the drop-off of the insertion shaft 13 from the support plate 14 is reliably prevented.

  As described above, according to the printer 5 and the waveform measuring apparatus 1, the linear portion 22a formed so as to form an acute angle with respect to the drawing direction of the roll paper 100 and the acute angle with respect to the direction opposite to the drawing direction. By forming the slit 21 with the linear portion 22b formed so as to be connected to the linear portion 22a in the shaft holder 15, for example, in the state where the waveform measuring device 1 is used in an upright posture, Assume that the roll paper 100 that has become lighter as the remaining amount is reduced is slid to the edge portion 14a side of the support plate 14 along the straight shaft portion 22a together with the insertion shaft 13 by pulling out the roll paper 100 by the print unit 12. In addition, since the end portion 13a of the insertion shaft 13 can be brought into contact with the corner portions of the straight portion 22a and the straight portion 22b, the roll paper 100 and the insertion shaft 13 can be further connected. It is possible to restrict the slide securely. Further, in the state where the waveform measuring apparatus 1 is used in the lying position, even if the roll paper 100 becomes lighter as the remaining amount decreases, the straight line portion 22a is used in the same manner as when used in the upright position. Further sliding of the roll paper 100 and the insertion shaft 13 can be reliably regulated by bringing the end portion 13a of the insertion shaft 13 into contact with the corner portion of the linear portion 22b. Therefore, according to the printer 5 and the waveform measuring apparatus 1, it is possible to reliably prevent the insertion shaft 13 inserted through the roll paper 100 from dropping from the support plate 14.

  Further, according to the printer 5 and the waveform measuring apparatus 1, the slit 21 is formed by including the linear portion 22c formed so as to be connected to the linear portion 22b so as to form an acute angle with respect to the drawing direction. Even when the waveform measuring apparatus 1 is used in a horizontal position, even if the printing unit 12 stops pulling out the roll paper 100 and the insertion shaft 13 slides downward along the straight line portion 22b in a state where the waveform measuring apparatus 1 is used in a horizontal position. The end portion 13a of the insertion shaft 13 can be brought into contact with the corner portions of the straight portion 22b and the straight portion 22c. For this reason, the slide beyond the insertion shaft 13 can be reliably regulated. As a result, even in this state, the insertion shaft 13 can be reliably prevented from falling off from the support plate 14.

  Further, according to the printer 5 and the waveform measuring apparatus 1, the end 13a of the insertion shaft 13 is in contact with the end 13a in the state where the end 13a is located on the edge 14a side of the support plate 14 in the slit 21, and the end 13a. In the state in which the slit 21 is positioned on the central portion 14b side of the support plate 14, the shaft pressing member 15 is configured with the convex portion 15a spaced from the end portion 13a on the distal end portion side. At the end, the end 13a of the insertion shaft 13 is supported by the corners of the straight portion 22b and the straight portion 22c, and the roll paper 100 and the insertion shaft 13 are even along the straight portion 22c by the start of the printing process. Even if it is slid to the edge portion 14a side of the support plate 14, the end portion 13a is located above the position of the convex portion 15a (on the edge portion 14a side of the support plate 14). Results movement is restricted by the convex portions 15a, even if such a condition occurs, it is possible to reliably prevent the falling of the insertion shaft 13 from the support plate 14.

  In addition, this invention is not limited to said structure. For example, the example in which the slit 21 provided with the three straight portions of the straight portion 22a, the straight portion 22b, and the straight portion 22c is formed in the shaft retainer 15 is described above, but four or more straight portions connected in a zigzag manner are provided. A shaft retainer in which a slit is formed can also be employed. Moreover, it can replace with the linear part 22c, and can also employ | adopt the structure which forms the linear part connected with the edge part 14a side of the linear part 22b so that it may make a right angle with respect to the drawer | drawing-out direction. In addition, the shaft retainer 15 in which the convex portion 15a is integrally formed by bending the metal plate has been described as an example. However, the convex portion 15a is formed separately, and the convex portion 15a is fixed to the elastic metal plate. It is also possible to employ a shaft press that has been used. Further, it is possible to employ a shaft press that is made of a material that does not have elasticity and that does not include the convex portion 15a. In this case, by defining the standing position of the shaft presser at a position outside the support plate 14 and spaced apart from each other by a distance slightly longer than the length of the insertion shaft 13, the length of the insertion shaft 13 is increased. Can be controlled. Moreover, although the example which applied the measuring apparatus which concerns on this invention to the waveform measuring apparatus 1 was mentioned above, the measuring apparatus which concerns on this invention is not limited to the waveform measuring apparatus 1, It can apply to various measuring apparatuses. Further, the printer 5 can be attached to various devices other than the measuring device, and the printer 5 can be used alone.

1 is a front view of a waveform measuring device 1. FIG. 1 is a side view of a waveform measuring device 1. FIG. 2 is a perspective view of a printer 5. FIG. 3 is a side view of the printer 5. FIG. FIG. 6 is a side view of the printer 5 in an upright posture in a state in which the insertion shaft 13 is in contact with corner portions of a straight portion 22a and a straight portion 22b. It is a side view of the waveform measuring apparatus 1 in the lying position. FIG. 6 is a side view of the printer 5 in a lying position. FIG. 6 is a side view of the printer 5 in a sideways posture in a state where an insertion shaft 13 is in contact with corner portions of a straight line portion 22a and a straight line portion 22b. FIG. 4 is a side view of the printer 5 in a sideways posture in a state where an insertion shaft 13 is in contact with corner portions of a straight line portion 22b and a straight line portion 22c.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Waveform measuring apparatus 2 Measuring part 5 Printer 12 Print part 13 Insertion shaft 13a End part 14 Support plate 14a Edge part 14b Center part 15 Axle pressing 15a Convex part 21 Slit 22a 1st linear part 22b 2nd linear part 22c 3rd linear part 100 roll paper

Claims (3)

Insertion shafts that are inserted through the center of the roll paper for printing, and slits that can be inserted through the ends of the insertion shafts from the edges to the center, and the ends that are inserted through the slits. A printer including a pair of support plates that respectively support the printing unit, and a printing unit that performs a printing process on the roll paper while pulling out one end side of the roll paper,
The slits before Symbol a first straight portion formed in a central portion, before Symbol said formed by connecting the edge side Rutotomoni the edge side of the from end first straight portion of the first straight portion A second straight portion formed so as to be closer to the print portion as it goes toward the end portion on the connection site side, and a third straight portion formed so as to be connected to the edge side of the second straight portion. With
The virtual straight line along the drawing direction of the roll paper, the virtual straight line along the first straight part, and the virtual straight line along the second straight part form a first virtual triangle, and along the drawing direction. A virtual straight line along the pull-out direction when the second virtual triangle is configured with a virtual straight line, a virtual straight line along the second straight line portion, and a virtual straight line along the third straight line portion; The first straight line portion is formed such that the internal angle of the first virtual triangle sandwiched between the virtual straight line along the first straight line portion forms an acute angle, and the virtual straight line and the second straight line along the pull-out direction are formed. The second straight line portion is formed so that the internal angle of the first virtual triangle sandwiched between the virtual straight line along the portion forms an acute angle, and along the virtual straight line along the pull-out direction and the third straight line portion The second virtual sandwiched between two virtual lines Printer rectangular interior angle is the third straight portion is formed at an acute angle. A plate-like elastic member disposed at a position outside the support plate so as to face the outer surface of the support plate;
The elastic member is in contact with the end in a state where the end of the insertion shaft is positioned on the edge side of the slit and in a state where the end is positioned on the center side. the printer of claim 1 Symbol placement is configured to include a protrusion away from the end to the distal end side. A printer according to claim 1 or 2 , and a measurement unit for measuring an electrical parameter of an input signal,
The printer is a measurement device that executes a print process based on the electrical parameters measured by the measurement unit.

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