printer

Abstract

One embodiment of the present invention is a printer comprising: a main housing; a printer cover configured to be openable and closable relative to the main housing with a rotation axis serving as a fulcrum; a platen roller rotatably mounted to the printer cover; a print head; a first connector disposed at a first position of the main housing; a second connector disposed on the printer cover so as to connect to the first connector when the printer cover is closed; and a platen holder disposed on the main housing for rotatably holding a first portion of the platen roller at a second position of the main housing when the printer cover is closed. The first position is disposed adjacent to the second position.

Description

Technical Field

[0001] The present invention relates to a printer that prints information on a printing medium. Background Art

[0002] Conventionally, a thermal printer is known that presses a printing medium between a thermal head and a platen roller and selectively heats a heating element on the thermal head to print on the printing medium by thermal transfer (hereinafter referred to as a "printer").

[0003] In some printers, a holder cover is openably and closably attached to a paper holder, which is mounted near the printer unit of the main body housing to store recording paper (e.g., Japanese Patent Application Laid-Open No. 2005-205733). Furthermore, the holder cover is secured when the printer unit is closed by engaging a locking member provided on the printer unit with an engaging protrusion provided on the holder cover. Furthermore, at this time, the rotating shaft of the platen roller is maintained in a state guided by the guide portion, and the connector consisting of the connection terminal portion on the main body housing and the contact electrode 38 on the holder cover remains connected.

[0004] However, in the printer disclosed in Japanese Patent Application Laid-Open No. 2005-205733, the distance from the rotation axis of the bracket cover to the position where the locking member and the engaging protrusion engage is approximately half the distance from the rotation axis of the bracket cover to the front end of the bracket cover. Meanwhile, the distance from the rotation axis of the bracket cover to the position where the connector is located is approximately equal to the distance from the rotation axis of the bracket cover to the front end of the bracket cover. Therefore, the distance from the position where the locking member and the engaging protrusion engage to the connector is approximately half the distance from the rotation axis of the bracket cover to the front end of the bracket cover. Furthermore, the connector is located approximately twice as far from the rotation axis of the bracket cover as the position where the locking member and the engaging protrusion engage.

[0005] Therefore, even if the locking member is locked with the engaging protrusion, the coupled state of the connector may be unstable.

[0006] In addition, when there is an error in the rotational position of the bracket cover of the engaging protrusion when the locking portion is engaged with the engaging protrusion, an error of about twice the error occurs in the rotational position of the bracket cover of the contact electrode, making it possible that the connector connection state is insufficient. Summary of the Invention

[0007] Therefore, an object of the present invention is to provide a printer in which a first connector provided on the main body side and a second connector provided on an openable and closable printer cover are well connected.

[0008] According to one aspect of the present invention, there is provided a printer comprising:

[0009] Main body shell;

[0010] a printer cover, which is configured to be openable and closable relative to the main housing with the rotation axis as a fulcrum;

[0011] a platen roller mounted on the printer cover in a manner rotatable relative to the printer cover;

[0012] a print head, which, when the printer cover is in a closed state, clamps the print medium together with the platen roller and prints on the print medium;

[0013] a first connector disposed at a first position of the main housing;

[0014] a second connector provided on the printer cover so as to be connected to the first connector when the printer cover is closed; and

[0015] a platen holding unit provided in the main housing for rotatably holding a predetermined portion of the platen roller at a second position of the main housing when the printer cover is closed;

[0016] The first position is provided so as to be close to the second position.

[0017] According to one aspect of the present invention, the connection between the first connector provided on the main body and the second connector provided on the openable and closable printer cover can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1A This is a perspective view showing the front, left side, and top of a printer according to one embodiment with the printer cover closed.

[0019] Figure 1B This is a perspective view showing the front, left side, and top of a printer according to one embodiment with the printer cover closed.

[0020] Figure 2 This is a perspective view showing the left side and top of a printer with the printer cover open, according to one embodiment.

[0021] Figure 3 This is a side cross-sectional view of a printer according to one embodiment.

[0022] Figure 4 This is a side view of a printer according to one embodiment.

[0023] Figure 5 This is a rear view of a printer according to one embodiment.

[0024] Figure 6 It is a plan view showing the structure of a main body-side connector of a printer according to one embodiment, and is a cross-sectional view taken along line AA and a cross-sectional view taken along line BB.

[0025] Figure 7 This is a perspective view showing the inner printer cover and outer printer cover of a printer according to one embodiment.

[0026] Figure 8 This is a cross-sectional view showing a state in which a bearing that receives a platen shaft is sandwiched between the inner and outer printer covers in a printer according to one embodiment.

[0027] Figure 9 This is a perspective view showing a main body connector, a platen shaft support portion, a platen holding bracket, and their surrounding portions of a printer according to one embodiment.

[0028] Figure 10 This is a perspective view showing a platen holding bracket and its surrounding parts of a printer according to one embodiment.

[0029] Figure 11 This is a side view showing an arm portion of a platen holding bracket and its surroundings of a printer according to one embodiment.

[0030] Figure 12 This is a side view showing the printer cover, platen shaft, arm, platen shaft support, etc. of a printer according to one embodiment.

[0031] Figure 13 This is a perspective view showing the inner surfaces of the inner and outer printer covers, the cover-side connectors, and the platen shaft of a printer according to one embodiment.

[0032] Figure 14 This is a perspective view showing the rear end of the printer body, the printer cover, and the hinges according to one embodiment.

[0033] Figure 15 This figure shows a platen support portion and a trajectory of circular motion of the platen in a printer according to one embodiment.

[0034] Figure 16 It is a plan view showing the structure of a cover-side connector of a printer according to one embodiment, and is a cross-sectional view taken along line AA and a cross-sectional view taken along line BB.

[0035] Figures 17A-17B middle, Figure 17A 1 is a side view showing a cover-side connector of a printer according to one embodiment. Figure 17B This is a side view showing a state of displacement in the axial direction of a cover-side connector male terminal of a printer according to one embodiment.

[0036] Figure 18 This is a circuit diagram showing a main body cover connector and a circuit connected thereto of a printer according to one embodiment.

[0037] Figure 19 This is a side view showing how the printer cover of a printer according to one embodiment deforms when an external impact is applied to the printer cover. DETAILED DESCRIPTION

[0038] Hereinafter, one embodiment of a printer according to the present invention will be described with reference to the drawings.

[0039] (1) Overall structure of the printer

[0040] Below, refer to Figure 1A 、 Figure 1B as well as Figure 2 The printer 1 according to the embodiment will be described.

[0041] Figure 1A These are perspective views showing the front, top, and left side views of the printer 1 according to the embodiment with the printer cover 3 closed. Figure 1B These are perspective views showing the front, top, and left side views of the printer 1 according to the embodiment with the printer cover 3 open. Figure 2 It is a perspective view showing the top and left side of the printer 1 according to the embodiment.

[0042] like Figure 1A 、 Figure 1B as well as Figure 2 As shown, the printer 1 of this embodiment includes a main body housing 2 , a printer cover 3 , a display panel 4 , a platen roller 10 , and a thermal head 28 (an example of a “print head” in the present invention).

[0043] For example, as in Figure 1A As understood in the text, the outer bottom surface 131 of the printer 1 (see Figure 4 The printer (e.g., the bottom surface of the printer) is roughly rectangular, with the direction along its long side defined as the front-to-back direction. Specifically, the side with the display panel 4 is defined as the front (FR), and the side opposite to it, where the printer cover is located, is defined as the rear (RR). Based on this front-to-back direction, the right side (RH), left side (LH), top side (UP), and bottom side (LO) are defined. In the following description, the right side (RH) or left side (LH) direction is referred to as the lateral direction, and the top side (UP) or bottom side (LO) direction is referred to as the vertical direction, as appropriate.

[0044] like Figure 2As shown, a roll body storage chamber 9 may be provided inside the printer 1 for storing a roll body 355 formed by winding a continuous paper (an example of the "print medium" of the present invention) 353 into a roll shape. An inner bottom surface 2a for placing the roll body 355 may also be formed in the main body housing 2 (see Figure 3 ). The continuous paper 353 includes a backing paper and a plurality of labels temporarily attached to the backing paper.

[0045] The printer cover 3 opens and closes the interior of the printer 1. A hinge 8 including a hinge shaft 81 is provided at the rear end of the printer cover 3 to pivotally support the printer cover 3 relative to the main body housing.

[0046] As will be described later, the hinge 8 is slidable in the front-rear direction.

[0047] The display panel 4 provides an input and output interface for the user, and is, for example, a liquid crystal display panel with a touch panel function.

[0048] like Figure 2 As shown, on the side of the printer cover 3 opposite to the side where the hinge 8 is located, that is, on the front end side, the platen roller 10 is supported so as to be rotatable in both forward and reverse directions. Figure 3 As shown, when the printer cover 3 is closed, the platen roller 10 is disposed behind the thermal head 28 .

[0049] The platen roller 10 is a conveying unit that conveys the continuous paper 353 drawn from the roll 355 held in the roll storage chamber 9 by a pair of roll guides 6a. The platen roller 10 is formed so as to extend along the width direction of the roll 355. The platen roller 10 is mechanically connected to a stepping motor (not shown) or the like for driving.

[0050] The thermal head 28 is a printing unit that prints information such as text, symbols, graphics, or barcodes on the continuous paper 353 drawn from the roll body 355. Figure 3 As shown, when the printer cover 3 is closed, the printing surface of the thermal head 28 faces the paper path of the continuous paper 353 and faces the platen roller 10. On the printing surface of the thermal head 28, multiple heating resistors (not shown) that generate heat when energized are arranged along the width of the continuous paper 353. The thermal head 28 is connected to a circuit board (not shown) that transmits printing signals to the thermal head 28.

[0051] A coil spring 157 is provided on the rear side of the thermal head 28 as a biasing member for applying a biasing force to the thermal head 28 .

[0052] When printing is performed with the printer cover 3 closed, the continuous paper 353 is conveyed by the platen roller 10 and is held between the platen roller 10 and the thermal head 28. At this time, the thermal head 28 is pressed against the platen roller 10 by the aforementioned force, thereby generating a print head pressure suitable for printing.

[0053] (2) Main body shell

[0054] The main body shell 2 has a portion that covers the space of the lower half of the roll body storage chamber 9 from the left and right sides, rear and bottom near the roll body storage chamber 9 located in the rear half of the printer 1, and a portion that covers the space that accommodates the mechanism and circuit located in the front half of the printer 1 from the left and right sides, front, bottom and top.

[0055] (3) Printer cover

[0056] The printer cover 3 is located near the roll storage chamber 9 and covers the upper half of the roll storage chamber 9 from the left and right sides, the rear, and the top.

[0057] The printer cover 3 can be Figure 1A The closed position shown is the same as Figure 1B The printer cover 3 is opened and closed about the rotation axis of the hinge 8 between the open positions at the maximum opening angle as shown. Here, the maximum opening angle is the opening angle of the printer cover 3 by the cover side buffer member 151 (see Figure 4 、 Figure 5 ) and the main body side cushioning member 141 (see Figure 4 、 Figure 5 ) and the printer cover 3 cannot be rotated any further.

[0058] In one embodiment, Figure 7 As shown, the printer cover 3 has a double-layer structure of an inner printer cover 36 and an outer printer cover 37 to ensure strength, but the present invention is not limited to this.

[0059] (4)Paper pressing roller

[0060] like Figure 7 As shown, when the outer printer cover 37 and the inner printer cover 36 are separated, the platen roller 10 can be temporarily held by the temporary holding portion 19 provided on the outer printer cover 37. A pair of bearings 61 are provided at both ends of the platen shaft 10a.

[0061] Figure 8 A cross section perpendicular to the platen shaft 10 a is shown at the bearing 61 when the outer printer cover 37 and the inner printer cover 36 are screwed together to form the integrated printer cover 3 .

[0062] like Figure 8 As shown, the pair of bearings 61 are held between the bearing retaining portion 37a provided on the inside of the outer printer cover 37 and the bearing retaining portion 36b provided on the outside of the inner printer cover 36. This allows the platen shaft 10a to be rotatably secured to the printer cover 3 when the outer and inner printer covers 37, 36 are screwed together to form the integrated printer cover 3.

[0063] (5) Paper pressing shaft support

[0064] like Figure 2 As shown, the main housing 2 is equipped with a pair of platen shaft supports 26. These supports are located near the left and right ends (an example of a second position) of the platen shaft 10a located at the front end of the printer cover 3 when the printer cover 3 is closed. The platen shaft supports 26 are formed on the main frame of the main housing 2.

[0065] More specifically, when the printer cover 3 is in the closed position, the pair of platen shaft support portions 26 support the pair of first supported portions 10c (see FIG. 1 ) located near the left and right ends of the platen shaft 10a. Figure 7 , an example of the second portion of the platen roller) are each supported in a rotatable manner.

[0066] like Figure 15 As shown, the front and rear surfaces of the first supported portion 10c of the paper pressing shaft 10a, in particular, abut against the vertical surfaces of the front side wall 26d and rear side wall 26e of each paper pressing shaft support 26. This restricts the front-to-back movement of the paper pressing shaft 10a. Furthermore, a vertical surface refers, for example, to a surface perpendicular to the outer bottom surface 131. However, the surfaces formed by the front side wall 26d and rear side wall 26e are not limited to vertical surfaces; any surfaces that are opposed to each other and support the first supported portion 10c of the paper pressing shaft 10a may be used.

[0067] exist Figure 9 The perspective view of FIG1 shows a platen shaft support portion 26 provided near the right end of the main body casing 2 of the printer 1 .

[0068] (6) Paper holding bracket

[0069] like Figure 2 As shown in FIG. 1 , a pair of arm portions 27g of the paper holding bracket 27 (an example of a paper holding portion) are provided near the left and right ends. Figure 10 As shown, the paper platen holder 27 includes a pair of arms 27g and a beam 27h connecting them. The beam 27h is provided with a hook 27i for bridging a coil spring 29. Furthermore, the pair of arms 27g is provided with a hole 27j for the rotation shaft 27a to pass through. Although not shown, the rotation shaft 27a passes through the main frame of the main housing 2.

[0070] Therefore, the paper holding bracket 27 can be rotated in a manner that the pair of arm portions 27g tilt in the front-back direction with the rotating shaft 27a as a fulcrum. In particular, the coil spring 29 tilts the pair of arm portions 27g in the direction of tilting forward (the direction in which the elevation angle θ decreases (see FIG. Figure 11 ))Apply force on.

[0071] like Figure 11 As shown, each arm 27g is provided with an upper gripping portion 27d and a lower gripping portion 27e in order of distance from the rotation axis 27a. A gripping portion groove 27b is formed between the upper gripping portion 27d and the lower gripping portion 27e.

[0072] like Figure 9 As shown, a right platen shaft support portion 26 is provided near the right end of the main body housing 2. A right arm portion 27g is provided adjacent to the center of the right platen shaft support portion 26. Although not shown, a left platen shaft support portion 26 is similarly provided near the left end. A left arm portion 27g is provided adjacent to the center of the left platen shaft support portion 26.

[0073] like Figure 12 As shown, when the printer cover 3 is in the closed position, the lower surface (floating prevention surface) 27k of the upper gripping portion 27d of each arm 27g of the platen holding bracket 27 and the second supported portion 10d of the platen shaft 10a (see FIG. Figure 7 , an example of the first portion of the platen roller). Furthermore, when the printer cover 3 is in the closed position, the upper surface (sinking prevention surface) 27p of the lower gripping portion 27e of each arm 27g of the platen holding bracket 27 contacts the second supported portion 10d of the platen shaft 10a (see Figure 7 Therefore, when the printer cover 3 is in the closed position, the second supported portion 10d of the platen shaft 10a is restricted from vertical movement by the anti-floating surface 27k and the anti-sinking surface 27p.

[0074] That is, in Figure 12 The platen roller 10 is provided with two pairs of surfaces (floating prevention surfaces 27k and sinking prevention surfaces 27p) that restrict the clockwise and counterclockwise circular motion of the second supported portion 10d of the platen roller 10 as the printer cover 3 swings. This prevents the platen roller 10 from swinging beyond a predetermined distance from its locked position (position Q(x1, y1, z1) described below) through the upper grip 27d, lower grip 27e, and grip groove 27b, ensuring reliable support.

[0075] Reference Figure 13The paper pressing shaft 10a has a first supported portion 10c near the end thereof and a second supported portion 10d further from the end (i.e., closer to the center). The vertical surfaces of the front side wall 26d and rear side wall 26e of the paper pressing shaft support 26 abut against the first supported portion 10c. The anti-floating surface 27k and the anti-sinking surface 27p contact the second supported portion 10d. The same applies to the other end of the paper pressing shaft 10a.

[0076] Therefore, as in Figure 12 As shown in the enlarged figure, when the printer cover 3 is in the closed position, the movement of the paper pressing shaft 10a is restricted from four directions by four surfaces: the vertical surface of the front side wall portion 26d of the paper pressing shaft support portion 26, the vertical surface of the rear side wall portion 26e, the floating prevention surface 27k of the paper pressing holding bracket 27, and the sinking prevention surface 27p.

[0077] When the printer cover 3 is in the open position, the elevation angle θ of the arm 27g is the minimum elevation angle θ1 (see Figure 11 As the printer cover 3 moves from the open position to the closed position, the paper pressing shaft 10a contacts the upper surface 27f. As the printer cover 3 is moved closer to the closed position, the upper surface 27f, which is inclined relative to the radius of the arm 27g, is pushed by the paper pressing shaft 10a, causing the elevation angle θ of the arm 27g to gradually increase. When the paper pressing shaft 10a passes the front end 27n of the arm 27g, the elevation angle θ of the arm 27g reaches its maximum elevation angle θ2. As the printer cover 3 is moved closer to the closed position, the paper pressing shaft 10a slowly moves below the front end 27n of the arm 27g. The arm 27g rotates toward a decreasing elevation angle θ while maintaining contact between the paper pressing shaft 10a and the front end 27n, due to the force of the coil spring 29. When the paper pressing shaft 10a moves below the anti-floating surface 27k, the elevation angle θ of the arm 27g reaches its minimum elevation angle θ1. At this point, the platen shaft 10a is restricted from upward movement by the anti-floating surface 27k and from downward movement by the anti-sinking surface 27p. This position, in which the platen shaft 10a is locked by the arm 27g, corresponds to the closed position of the printer cover 3.

[0078] To release the lock, the cover open button 51b is pressed, causing the arm 27g to swing against the restoring force of the coil spring 29, increasing the arm's elevation angle θ. This causes the printer cover 3 to swing toward the open position due to the force of the hinge 8, releasing the platen shaft 10a from the grip groove 27b.

[0079] (7) Hinge

[0080] like Figure 4 and Figure 5As shown, a hinge 8 is provided on an upper edge portion 127 of the rear surface portion 121 of the main body housing 2 so as to extend in the lateral direction.

[0081] The lower edge 129 of the rear surface 123 of the printer cover 3 is connected to the upper edge 127 of the rear surface 121 of the main body housing 2 via the hinge 8 , so that the printer cover 3 can be opened and closed by the hinge 8 .

[0082] like Figure 14 As shown, the hinge 8 includes a hinge shaft 81 , a main body-side elongated bearing hole 82 , an inner printer cover-side circular bearing hole 83 , an outer printer cover-side circular bearing hole 84 , and a torsion spring 85 .

[0083] A pair of main body side bearing slots 82 are provided at the left and right ends near the rear end of the spool storage chamber 9. The main body side bearing slots 82 have a major axis in the front-to-back direction. However, the major axis of the main body side bearing slots 82 may be slightly offset from the front-to-back direction.

[0084] A pair of inner printer cover side bearing circular holes 83 are provided at the rear end of the inner printer cover 36 .

[0085] A pair of outer printer cover side bearing circular holes 84 are provided at the rear end of the outer printer cover 37 .

[0086] The hinge shaft 81 is inserted through a pair of inner printer cover side bearing circular holes 83 and a pair of outer printer cover side bearing circular holes 84 , and has both ends inserted into a pair of main body side bearing elongated holes 82 .

[0087] The hinge shaft 81 (an example of a rotation shaft) is provided on the upper edge portion 127 of the rear surface portion 121 of the main body housing 2 so as to extend in the lateral direction (see Figure 4 ), the main body side bearing slot 82, the inner printer cover side bearing round hole 83, and the outer printer cover side bearing round hole 84 are also provided at the upper edge 127 of the rear surface 121 of the main body case 2. Therefore, the printer cover 3 is located at a position slightly above the horizontal boundary 133 between the main body case 2 and the printer cover 3 (see FIG. 1 ). Figure 5 ) There are circular holes 83 for the inner printer cover side bearing and circular holes 84 for the outer printer cover side bearing at the lower position.

[0088] The inner and outer printer covers 36 and 37 are screwed together during use. When screwed together, the inner and outer printer covers 36 and 37 can rotate about the hinge axis 81 while still integrated. On the other hand, when not screwed together, the inner and outer printer covers 36 and 37 can each rotate separately about the hinge axis 81. Figure 2The inner printer cover 36 and the outer printer cover 37 are shown as being integrated by screw fastening. Figure 7 The inner printer cover 36 and the outer printer cover 37 are shown without being screwed to be separated from each other.

[0089] Therefore, if the hinge shaft 81 slides in the front-to-back direction, the integrated inner printer cover 36 and outer printer cover 37 slide in the front-to-back direction. In other words, if the hinge shaft 81 slides in the front-to-back direction, the printer cover 3 slides in the front-to-back direction.

[0090] Furthermore, the integrated inner printer cover 36 and outer printer cover 37 can rotate together about the hinge shaft 81. In other words, the printer cover 3 can rotate about the hinge shaft 81.

[0091] The torsion spring 85 biases the printer cover 3 to open the closed printer cover 3 .

[0092] The main body side bearing long hole 82 having a longitudinal axis in the front-rear direction allows the hinge shaft 81 to slide in the front-rear direction. In other words, the hinge shaft 81 can slide in a direction perpendicular to the hinge shaft 81 in a horizontal plane.

[0093] Figure 15 The movement of the paper platen shaft 10a when the printer cover 3 is closed is shown. Figure 15 In FIG. 1 , positions B22 , B23 , and B24 indicate the center position of the platen shaft 10 a , and loci S20 , S23 , and S24 indicate the loci of the center position of the platen shaft 10 a .

[0094] Reference Figure 15 , when the hinge shaft 81 is located at the rear end position A1 (refer to Figure 12 ) (i.e., when the hinge shaft 81 is located at the rear end of the main body side bearing slot 82), the paper pressing shaft 10a performs a circular motion along the trajectory S20 in response to the swing of the printer cover 3. When the paper pressing shaft 10a reaches position B22, it contacts the rear side wall 26e of the paper pressing shaft support 26. The hinge shaft 81 can then be moved within the main body side bearing slot 82 between position A1 and position A2 at the front end (see Figure 12) in the front-to-back direction, the platen shaft 10a, while in contact with the rear wall 26e, follows trajectory S23 and reaches position B23. After reaching position B23, the platen shaft 10a follows the vertical surfaces of the front wall 26d and rear wall 26e of the platen shaft support 26 to position B24. When the platen shaft 10a is at position B24, it reaches near the bottom 26c, and the printer cover 3 is closed. At this point, the first supported portion 10c of the platen shaft 10a is sandwiched between the vertical surfaces of the front wall 26d and rear wall 26e, supported by these vertical surfaces.

[0095] Just before the printer cover 3 is closed, the platen shaft 10a moves vertically along trajectory B24. This movement also causes the cover-side connector 321, which is attached to the printer cover 3 along with the platen shaft 10a, to move vertically. This movement causes the male connector terminals 323 of the cover-side connector 321 to contact the female connector terminals 303 of the main body connector 301, significantly reducing the possibility of contact failure.

[0096] If the hinge shaft 81 cannot slide in the front-back direction, the platen shaft 10a cannot pass through the track S23, and thus the platen shaft 10a cannot reach the bottom 26c. Since the hinge shaft 81 can slide in the front-back direction through the main body side bearing slot 82, it can reach the bottom 26c.

[0097] Furthermore, if the printer cover 3 is not a two-layer structure consisting of the inner printer cover 36 and the outer printer cover 37 but is an integral structure, only one pair of left and right circular holes for the printer cover bearings may be provided.

[0098] (8) Cover-side cushioning components and main body-side cushioning components

[0099] like Figure 5 As shown, a plurality of main body side cushioning members 141 are arranged in a horizontal direction on the rear surface portion 121 of the main body housing 2. Figure 5 In the illustrated example, three main body-side cushioning members 141 are arranged side by side in the horizontal direction on each of the left and right sides of the rear surface portion 121 of the main body housing 2 .

[0100] Similarly, a plurality of cover-side buffer members 151 are arranged in a row in the horizontal direction on the rear surface portion 123 of the printer cover 3. Figure 5 In the example shown, three cover-side cushioning members 151 are arranged side by side in the horizontal direction on each of the left and right sides of the rear surface portion 123 of the printer cover 3 .

[0101] In one embodiment, Figure 5As shown, the main body side cushioning member 141 and the cover side cushioning member 151 may be provided in pairs at the same position in the lateral direction.

[0102] exist Figure 5 In the example shown, the main body-side cushioning member 141 has five surfaces, consisting of a front end surface 142 and four side surfaces. Furthermore, the cover-side cushioning member 151 also has five surfaces, consisting of a front end surface 152 and four side surfaces. This is merely an example, and the shapes of the surfaces of the main body-side cushioning member 141 and the cover-side cushioning member 151 can be designed appropriately.

[0103] (9) Main body side connector and hood side connector

[0104] like Figure 12 、 Figure 9 as well as Figure 13 As shown, the main body side connector 301 is provided in the main body side connector installation portion 313 (an example of a first position), and the cover side connector 321 is provided in the cover side connector installation portion 329 .

[0105] like Figure 12 As shown, when the printer cover 3 is in the closed position, the body-side connector female terminals 303 of the body-side connector 301 contact the cover-side connector male terminals 323 of the cover-side connector 321. The six contact points between the body-side connector female terminals 303 and the cover-side connector male terminals 323 exist on a single imaginary plane parallel to the exterior bottom surface 131 of the printer 1.

[0106] Reference Figure 6 and Figure 9 The main body side connector 301 (an example of a first connector) provided in the main body side connector installation portion 313 has the following structure.

[0107] The main body connector contact surface 309 (an example of a first contact surface) is provided with a main body connector first recess 305, and inside this recess are provided six main body connector second recesses 307 arranged in a 2×3 grid pattern. A main body connector female terminal 303 is disposed at the bottom of each main body connector second recess 307.

[0108] A pair of side protrusions 311 are provided on both sides of the main body side connector contact surface 309. The main body side connector contact surface 309 is parallel to the external bottom surface 131 of the printer 1.

[0109] Reference Figure 16 and Figure 13 The cover-side connector 321 (an example of a second connector) provided on the inner printer cover 36 has the following structure.

[0110] Six cover-side connector male terminals 323 are arranged in a 2×3 grid pattern on the cover-side connector contact surface 325 (an example of a second contact surface). When the printer cover 3 is in the closed position, the cover-side connector contact surface 325 is parallel to the exterior bottom surface 131 of the printer 1.

[0111] A pair of side grooves 327 are provided on both sides of the cover-side connector abutting surface 325 .

[0112] When the printer cover 3 is closed, the six main body-side connector female terminals 303 and the six cover-side connector male terminals 323 contact each other.

[0113] In addition, as in Figure 12 As shown in FIG, when the printer cover 3 is closed, the cover-side connector contact surface 325 contacts the main body-side connector contact surface 309 .

[0114] Furthermore, the pair of side grooves 327 engage with the pair of side protrusions 311. This engagement prevents liquids such as water from entering the area sandwiched between them. Furthermore, because the pair of side grooves 327 and the pair of side protrusions 311 extend in the front-to-back direction, this engagement prevents the main body-side connector abutment surface 309 from sliding laterally relative to the cover-side connector abutment surface 325. Consequently, the cover-side connector male terminals 323 corresponding to the respective main body-side connector female terminals 303 are prevented from sliding laterally relative to the respective main body-side connector female terminals 303.

[0115] In addition, in other embodiments, the body-side connector 301 may be provided with a side groove portion, and the cover-side connector 321 may be provided with a side protrusion portion.

[0116] Reference Figure 17A The cover side connector male terminal 323 has a portion exposed (protruding) from the cover side connector abutting surface 325 and a portion not exposed from the cover side connector abutting surface 325. Figure 16 In FIG. 1 , only the portion of the cover-side connector male terminal 323 exposed (protruding) from the cover-side connector abutting surface 325 is shown.

[0117] In addition, the cover side connector male terminal 323 is able to be connected to the cover side connector male terminal base 324 which is cylindrical and has a larger diameter than the cover side connector male terminal. Figure 17B As shown, it is assembled inside the hood-side connector male terminal base 324 so as to be displaced in the axial direction within a predetermined range.

[0118] The cover-side connector male terminal base 324 is fixed to the outer printer cover 37 via a fixing member 331 .

[0119] Reference Figure 17BThe length D of the portion protruding toward the front side relative to the cover-side connector abutting surface 325 (the aforementioned predetermined range) ranges from Dmim (the shortest length) in state S1 to Dmax (the longest length) in state S3. Furthermore, the cover-side connector male terminal 323 is biased in a direction in which the length D of the portion protruding toward the front side relative to the cover-side connector abutting surface 325 increases, for example, by a spring (not shown).

[0120] When the printer cover 3 is open, the cover-side connector male terminal 323 is in state S3, and the length D = Dmax. When the printer cover 3 is closed, the cover-side connector male terminal 323 is in state S2. The length of the portion protruding toward the front side relative to the cover-side connector contact surface 325 at this time is Dstd. The length Dstd is the length when the printer cover 3 is closed and the cover-side connector contact surface 325 contacts the main body connector contact surface 309. Here, Dmim < Dstd < Dmax, and preferably, Dstd ≒ (Dmim + Dmax) / 2.

[0121] The length D of the printer cover 3 when it is open is Dmax. Furthermore, during the process of closing the printer cover 3 from its open state, the cover-side connector male terminal 323 reaches the main body connector female terminal 303. At this point, the cover-side connector abutment surface 325 does not reach the main body connector abutment surface 309.

[0122] The length D gradually decreases until the cover-side connector abutting surface 325 reaches the main body-side connector abutting surface 309 , and when the cover-side connector abutting surface 325 reaches the main body-side connector abutting surface 309 , the length D becomes Dstd.

[0123] Reference Figure 2 and Figure 9 In one embodiment, the main body-side connector mounting portion 313 is located adjacent to the rear (RR) of the platen shaft support portion 26 and adjacent to the rear (RR) of the arm portion 27g in the front-to-back direction. The main body-side connector mounting portion 313 is located approximately at the same position as the platen shaft support portion 26 in the lateral direction and is located adjacent to the left side (LH) (i.e., the outer side) of the arm portion 27g. The main body-side connector mounting portion 313 is located at approximately the same height as the bottom 26c of the platen shaft support portion 26 in the vertical direction.

[0124] The main body side connector installation portion 313 is provided integrally with the main body frame. In particular, the main body side connector contact surface 309 and the pair of side protrusions 311 are formed as part of the main body frame.

[0125] Magnets may be placed near both the main body connector 301 and the cover-side connector 321. Alternatively, a magnet may be placed near one of the connectors 301 and 321, and a ferromagnetic body may be placed near the other. With this configuration, the main body connector 301 and the cover-side connector 321, which are temporarily brought into close proximity, are attracted to each other by magnetic force, ensuring a secure connection between the connectors.

[0126] When the printer cover 3 is closed, the platen shaft 10a is positioned vertically and front-to-back by the platen shaft support 26 and the platen holding bracket 27. Therefore, the main body connector 301 is positioned accurately relative to the platen shaft 10a.

[0127] On the other hand, as referenced Figure 17A As described above, the fixing member 331 that secures the cover-side connector male terminal base 324 is fixed to the outer printer cover 37, and the cover-side connector contact surface 325 is part of the outer surface of the outer printer cover 37. Furthermore, the platen shaft 10a is rotatably fixed relative to the printer cover 3. Therefore, the relative position of the cover-side connector 321 to the platen shaft 10a in the printer cover 3 is highly accurate.

[0128] As described above, in the printer 1 , the relative positional relationship between the main body connector 301 and the cover connector 321 is highly accurate when the printer cover 3 is closed.

[0129] As described above, when the printer cover 3 is closed, the platen shaft 10a is positioned in four directions: up, down, and front and back, by the platen shaft support 26 and the platen holding bracket 27. This ensures high precision in the relative positional relationship between the body-side connector 301 and the cover-side connector 321. Consequently, the contact between the body-side connector female terminals 303 and the cover-side connector male terminals 323 is maintained.

[0130] According to other viewpoints, Figure 9 and Figure 12 As shown, in the printer 1, the position where the main body connector mounting portion 313 is located (an example of a first position) is positioned close to, and preferably adjacent to, the position where the platen holding bracket 27 holds the second supported portion 10d of the platen shaft 10a (an example of a second position). This position creates a closer contact point between the main body connector 301 and the cover-side connector 321 than the position where the second supported portion 10d of the platen shaft 10a is held, minimizing contact positional deviation and improving contact stability between the connectors.

[0131] exist Figure 3In the figure, regarding the front and rear directions of the printer 1, when viewed from a direction perpendicular to the external bottom surface 131, the side where the platen roller 10 is located when the printer cover 3 is in the closed state is defined as the front side, and the side where the hinge 8 (or hinge shaft 81) is located is defined as the rear side.

[0132] like Figure 12 As shown, the position where the main body side connector setting portion 313 is provided is located between the position where the paper pressing holding bracket 27 holds the second supported portion 10d of the paper pressing shaft 10a and the hinge shaft 81, based on the front-to-back direction of the printer 1 when the printer cover is in the closed state.

[0133] As described above, the vertical displacement of the second supported portion 10d of the platen shaft 10a is restricted by the platen holding bracket 27. Therefore, the body-side connector 301, located between the second supported portion 10d of the platen shaft 10a and the hinge shaft 81 in the front-to-back direction, and the cover-side connector 321 fixed to the printer cover 3 to which the platen shaft 10a is mounted, maintain high contact stability.

[0134] Specifically, in printer 1, the connector contact point is located between the hinge and the locked position of the printer cover and the main body housing, thereby improving contact stability. If the connector contact point were not located between the hinge and locked positions, deformation of the main body housing or deviation from the locked position could easily affect the position of the contact point.

[0135] Since the settings of the position detection sensor 343 or the tag sensor 345 are reset when the main body connector 301 and the cover connector 321 are separated while the printer 1 is being carried, the contact stability between the main body connector 301 and the cover connector 321 is important.

[0136] (10) Peripheral circuits

[0137] Reference Figure 18 The main body side connector female terminals 303 - 1 to 303 - 6 are connected to the main body side circuit 335 . In addition, the main body side circuit 335 is connected to a power supply 334 .

[0138] Furthermore, of the six sets of main body-side female connector terminals 303-1 to 303-6 and cover-side male connector terminals 323-1 to 323-6, the first and second sets of main body-side female connector terminals 303-1 and 303-2 and cover-side male connector terminals 323-1 and 323-2 correspond to reflective position detection sensors 343. Reflective position detection sensors 343 illuminate continuous paper 353 and detect black position detection marks on continuous paper 353 based on the intensity of the reflected light. The first set of cover-side male connector terminals 323-1 and the second set of cover-side male connector terminals 323-2 are connected to the position detection sensors 343 via intra-substrate wiring 339-1 and 339-2, respectively, on the flexible substrate 337.

[0139] The third and fourth sets of main body-side female connector terminals 303-3 and 303-4 and cover-side male connector terminals 323-3 and 323-4 correspond to transmissive tag sensors 345. Transmissive tag sensors 345 detect tags on continuous paper 353 based on the intensity of light received from a light-emitting element 347 via a light-emitting optical filter 351, continuous paper 353, and a light-receiving optical filter 349. The third set of cover-side male connector terminals 323-3 and the fourth set of cover-side male connector terminals 323-4 are connected to the tag sensors 345 via intra-substrate wiring 339-3 and 339-4, respectively, on a flexible substrate 337.

[0140] The fifth and sixth sets of body-side female connector terminals 303-5 and 303-6 and cover-side male connector terminals 323-5 and 323-6 are used to detect opening and closing of the printer cover 3. The fifth set of cover-side male connector terminals 323-5 and the sixth set of cover-side male connector terminals 323-6 are short-circuited by intra-substrate wiring 339-5 on the flexible substrate 337.

[0141] The main body-side connector female terminal 303 - 6 and the cover-side connector male terminal 323 - 6 of the sixth group correspond to the ground line.

[0142] Reference Figure 2 The front surface 9a and rear surface 36a of the continuous paper path are provided on the main body and inside the printer cover 36, respectively. The front surface 9a and rear surface 36a of the continuous paper path form a path for the continuous paper 353 to pass through just before reaching the platen roller 10 and thermal head 28 when the printer cover 3 is closed.

[0143] A light-emitting optical filter 351 and a light-receiving optical filter 349 are provided on the front surface 9a and rear surface 36a of the continuous paper path, respectively. When the printer cover 3 is closed, the light-emitting optical filter 351 and the light-receiving optical filter 349 face each other across the continuous paper 353 being conveyed from the roll body 355 to the thermal head 28.

[0144] A light emitting element 347 is arranged on the inner surface side of the light emitting side optical filter 351. Figure 7 As shown, a sensor substrate 341 carrying a tag sensor 345 is disposed behind the continuous paper path rear surface 36a. When the printer cover 3 is closed, the tag sensor 345 faces the light emitting element 347.

[0145] like Figure 7 As shown, in the cover side connector setting portion 329, the cover side connector male terminal 323 ( Figure 7 The flexible substrate 337 (not visible in the figure) is connected to the sensor substrate 341 via the edge of the inner surface of the inner printer cover 36 (the surface opposite to the outer printer cover 37).

[0146] Refer again Figure 6 When the printer cover 3 is opened, the body-side connector female terminal 303, which is connected to the body-side circuit 335 receiving power from the power supply 334, is exposed. The body-side connector female terminal 303 is located recessed relative to the body-side connector contact surface 309. Specifically, since the tip of the body-side connector female terminal 303, which contacts the cover-side connector male terminal 323, is located within the body-side connector second recess 307, static discharge caused by a user touching the body-side connector female terminal 303 is prevented.

[0147] When the printer cover 3 is open, the user could potentially touch the cover-side connector male terminal 323. However, since power is not supplied to the position detection sensor 343 and tag sensor 345 connected to the cover-side connector male terminal 323 when the printer cover 3 is open, these electronic components can be protected from damage due to electrostatic discharge and other factors.

[0148] In the example shown in the figure, the main body side connector is a female type and the cover side connector is a male type, but the present invention is not limited thereto. The main body side connector may be a male type and the cover side connector may be a female type.

[0149] In existing printers, the sensors on the printer cover are connected to the electronic circuitry in the main body housing via cables near the hinge that rotatably connects the printer cover to the main body housing. Consequently, the cables flex each time the printer cover is opened or closed, potentially causing breakage. Furthermore, since the electronic circuitry and sensors remain electrically connected during the printer cover's opening and closing, electrical failures can occur. Furthermore, special components are required to route these cables. This wiring also requires significant time, making it a burden when replacing the printer cover.

[0150] In contrast, the printer 1 of this embodiment does not utilize cables that pass through the hinge 8 near the printer cover 3, which rotatably connects the printer cover 3 to the main housing 2. Therefore, the cables do not become disconnected when the printer cover is opened or closed. Furthermore, there is no need for dedicated components for cable routing. Since there is no time required for cable routing, replacement of the printer cover 3 is easy.

[0151] When the printer cover 3 is open, the position detection sensor 343 and the tag sensor 345 are not electrically connected to the main body circuit 335 (an example of a circuit connected to the power supply), and other circuit components located in the printer cover 3 are also not electrically connected to the main body circuit 335. Therefore, electrical failures such as discharges caused by these electronic components located in the printer cover 3 when the printer cover 3 is open can be avoided.

[0152] like Figure 3 As shown, when printing, the coil spring 157 applies force to the platen roller 10 backward via the thermal head 28 and the print medium. Although the force direction of the coil spring 157 is the front-back direction of the printer 1, as shown in FIG. Figure 15 As shown, since the platen shaft 10a is supported from the rear by the rear side wall portion 26e of the platen shaft support portion 26, rearward displacement of the platen shaft 10a is suppressed.

[0153] Since the side protrusions 311 and the side grooves 327 are kept engaged, the cover-side connector abutting surface 325 is restricted from lateral movement relative to the main body-side connector abutting surface 309, but is still able to move in the front-to-back direction. Even if the platen shaft 10a moves slightly in the front-to-back direction, the cover-side connector abutting surface 325 slides on the main body-side connector abutting surface 309 in the front-to-back direction, and contact between the connectors is maintained.

[0154] Furthermore, even if the distance from the main body side connector abutting surface 309 to the cover side connector abutting surface 325 changes due to the change of the position or posture of the platen roller 10 in the front-back direction, the connection state between the main body side connector 301 and the cover side connector 321 is well maintained. Figure 17BAs shown, the cover-side connector male terminal 323 is urged in a direction in which the length of the portion protruding toward the surface side relative to the cover-side connector abutting surface 325 increases. Therefore, the variation in the protruding length of the cover-side connector male terminal 323 absorbs the variation in the distance, and the contact state between the main body-side connector female terminal 303 and the cover-side connector male terminal 323 is well maintained.

[0155] Next, the impact absorbency will be described.

[0156] like Figure 19 As shown, there is a case where, when an impact (external force F) is applied to the printer cover 3 from the outside, the hinge shaft 81 moves along the main body side bearing slot 82 (see FIG. Figure 14 ) deforms in a sliding manner to absorb impact.

[0157] In addition, there is a situation where, when an impact is applied to the printer cover 3 from the outside, the hinge shaft 81 slides along the long hole 82 for the main body side bearing and the paper pressing shaft 10a is held by a pair of arms 27g of the paper pressing holding bracket 27, and the paper pressing roller 10 slides in the front-to-back direction to absorb the impact.

[0158] Even when such an impact is applied, the contact state between the main body-side connector female terminal 303 and the cover-side connector male terminal 323 is maintained in a good state for the following reason.

[0159] The major axis of the main body-side bearing slot 82 extends in the front-rear direction so that the hinge shaft 81 can slide perpendicularly to the hinge shaft 81 on a surface horizontal to the outer bottom surface 131 of the printer 1 .

[0160] As already described, the main body-side connector abutting surface 309 and the cover-side connector abutting surface 325 are parallel to the external bottom surface 131 of the printer 1 .

[0161] like Figure 12 As shown, when the printer cover 3 is in the closed position, the orientation of the floating prevention surface 27k and the sinking prevention surface 27p located at the upper and lower positions of the holding portion groove 27b is roughly the same as the orientation of the main body side connector abutment surface 309 and the cover side connector abutment surface 325.

[0162] Therefore, even if an external impact is applied, the contact state between the main body-side connector abutting surface 309 and the cover-side connector abutting surface 325 hardly changes, and the contact state between the main body-side connector female terminal 303 and the cover-side connector male terminal 323 is also well maintained.

[0163] Furthermore, a force is applied to the cover-side connector male terminal 323 in a direction that increases the length of the portion protruding toward the surface relative to the cover-side connector abutment surface 325. Therefore, even if the vertical distance between the main body-side connector abutment surface 309 and the cover-side connector abutment surface 325 fluctuates due to an impact, the change in the protruding length of the cover-side connector male terminal 323 can absorb this distance fluctuation. Consequently, the contact between the main body-side connector female terminal 303 and the cover-side connector male terminal 323 is well maintained.

[0164] The printer 1 can be placed vertically. Figure 4 and Figure 5 As shown, the printer 1 can be placed upright with the plane PL formed by the front end surfaces 142 of the plurality of main body-side cushioning members 141 and the front end surfaces 152 of the plurality of cover-side cushioning members 151 serving as the bottom surface.

[0165] For example, if the printer 1 is placed on a non-flat surface, or if the printer 1 can maintain its upright position even if tilted slightly, the hinge shaft 81 may slide along the main body bearing slot 82. In this case, the printer cover 3 slides relative to the main body case 2.

[0166] Even in this case, for the same reasons as those described regarding impact absorption, the contact state between the main body side connector abutment surface 309 and the cover side connector abutment surface 325 hardly changes, and the contact state between the main body side connector female terminal 303 and the cover side connector male terminal 323 is well maintained.

[0167] The present invention can be implemented in various other forms without departing from its spirit or main features. Therefore, the above-mentioned embodiments are merely illustrative and should not be interpreted in a limiting sense. The scope of the present invention is indicated by the claims and is not limited by the main text of the specification. Furthermore, all modifications and variations within the scope of the equivalents of the claims are included within the scope of the present invention.

[0168] For example, in the above-described printer 1, the position of the platen shaft 10a is controlled in four directions, namely, the vertical and horizontal directions, by the platen shaft support 26 and the platen holding bracket 27. However, the present invention is not limited to this. Alternatively, the platen shaft support 26 may not be provided, and the platen holding bracket 27 may be used to control the displacement of the platen shaft 10a. Even with this configuration, Figure 11 As shown, the platen shaft 10a is also restrained in the vertical direction by the floating prevention surface 27k and the sinking prevention surface 27p. This ensures the relative positional accuracy of the body-side connector 301 with respect to the platen shaft 10a when the printer cover 3 is closed. This ensures high relative positional accuracy between the body-side connector 301 and the cover-side connector 321.

[0169] The present invention relates to patent application No. 2020-191920 filed with the Japan Patent Office on November 18, 2020, and patent application No. 2021-167817 filed with the Japan Patent Office on October 13, 2021, the entire contents of which are incorporated into this specification by reference.

Claims

1. A printer, characterized in that: have: Main body shell; a printer cover, which is configured to be openable and closable relative to the main housing with a rotation axis as a fulcrum; a paper pressing roller mounted on the printer cover in a manner capable of rotating relative to the printer cover; a print head, which, when the printer cover is in a closed state, clamps the print medium together with the platen roller and prints on the print medium; a first connector disposed at a first position of the main housing; a second connector provided on the printer cover so as to be connected to the first connector when the printer cover is in a closed state; as well as a paper platen holding portion, which is provided at a second position of the main housing and, when the printer cover is in a closed state, holds the first portion of the paper platen roller in a rotatable manner and restricts the vertical movement of the paper platen roller, thereby locking the main housing to the printer cover in the closed state; The first position is provided close to the second position.

2. The printer according to claim 1, wherein: When viewed from a direction perpendicular to the bottom surface of the printer, the front-to-back direction of the printer is defined by taking the side where the platen roller is located when the printer cover is closed as the front side and the side where the rotation axis is located as the rear side. When the printer cover is closed, the first position is located between the rotation axis and the second position with respect to the front-to-back direction.

3. The printer according to claim 2, wherein: The main body housing has a long hole formed therein, through which the rotating shaft is inserted and through which the rotating shaft can slide in the front-rear direction of the printer. The main body housing has a second portion supporting the platen roller in the front-rear direction of the printer, and two opposing portions. The first connector and the second connector are connected in a direction along the first opposite side.

4. The printer according to claim 3, wherein: The first connector has a first contact surface that is parallel to the bottom surface of the printer when the first connector is connected to the second connector. The second connector has a second contact surface that is parallel to the bottom surface of the printer when the second connector is connected to the first connector. When the printer cover is in the closed state, the second contact surface of the second connector can slide on the first contact surface in the front-to-back direction of the printer.

5. The printer according to claim 4, characterized in that A groove or a protrusion is provided on the first contact surface, The second contact surface is provided with a protrusion or a groove, When the printer cover is in the closed state, the groove or the protrusion provided on the first contact surface engages with the protrusion or the groove provided on the second contact surface.

6. The printer according to any one of claims 3 to 5, characterized in that: A biasing member is provided for biasing the print head toward the platen roller. The force applying direction of the force applying component is the front-rear direction of the printer.

7. The printer according to any one of claims 1 to 5, characterized in that: When the printer cover is in the closed position, the first position is located lower than the platen roller, with the height direction being perpendicular to the printer bottom.

8. The printer according to any one of claims 1 to 5, characterized in that: When the printer cover is in the closed position, the first position is located higher than the bottom end of the printer cover, with the height direction being perpendicular to the printer bottom surface.

9. The printer according to any one of claims 1 to 5, characterized in that: In the width direction of the printer, a distance from the center of the printer to the first position is longer than a distance from the center of the printer to the platen.

10. The printer according to any one of claims 1 to 5, characterized in that: The first connector is connected to a circuit connected to a power source of the printer. The second connector is connected to the circuit when connected to the first connector.

11. The printer according to any one of claims 1 to 5, characterized in that: The first connector has a female terminal, The second connector has a male terminal.

12. The printer according to claim 11, wherein: The female terminal of the first connector is arranged in a recess provided in the main housing. The front end of the female terminal of the first connector, which contacts the male terminal of the second connector, is located in the recessed portion.

13. The printer according to claim 11, wherein: The male terminal of the second connector is connected in a state where it is biased toward the female terminal of the first connector.

14. The printer according to any one of claims 1 to 5, characterized in that: A sensor is provided on the printer cover and detects the printing medium. The sensor is connected to the second connector.

15. The printer according to any one of claims 1 to 5, characterized in that: The printer cover comprises an inner printer cover and an outer printer cover. The second connector is provided on the inner printer cover.

16. The printer according to claim 15, wherein: A substrate including a circuit connected to the second connector is provided on a surface of the inner printer cover that is closer to the outer printer cover.

17. The printer according to any one of claims 1 to 5, characterized in that: Magnets are arranged near both the first connector and the second connector, or a magnet is arranged near one connector and a ferromagnetic body is arranged near the other connector.

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