Support Rod and Printer

Abstract

The present application provides a support rod for a cleaning paper roll of a printer, and a printer using the support rod, the support rod having a first connection part, a second connection part, and a main body part, the first connection part being connected to an apparatus, the second connection part being connected to the apparatus, the main body part being located between the first connection part and the second connection part in the axial direction of the support rod, and being removably connected to the first connection part and the second connection part, so that the main body part can be connected to or separated from the apparatus, and the support rod can be driven to rotate. The support rod in the present application can be conveniently removed without the need to move other components of the printer, thus facilitating replacement of the cleaning paper roll.

Description

[Technical field]

[0001] This application relates to support rods, and more particularly to support rods used in cleaning paper rolls in solder paste printers. [Background technology]

[0002] In the sealing / affixing process to the surface of a printed circuit board, a solder paste printer is used to print solder paste onto an electronic product (such as a circuit board). A solder paste printer typically includes a stencil (also called a template), a solder paste application device, and a mechanism such as a scraper or squeegee. During printing, a circuit board is automatically fed into the solder paste printer and first aligned with the stencil in the solder paste printer before the solder paste is printed onto the circuit board. Once the circuit board is aligned with the stencil in the printer, the solder paste is dispensed by moving the scraper or squeegee in a skimming motion over the stencil to force the solder paste through the holes in the stencil and onto the circuit board. After the printing operation, the circuit board is sent to another process step in a printed circuit board converting production line.

[0003] After printing of one or more circuit boards is completed, there may be residual solder paste on the stencil, which will affect the printing of the next circuit board. For this reason, solder paste printers often have cleaning paper under the stencil to wipe off any residual solder paste on the stencil, thus preventing it from affecting the next circuit board. Summary of the Invention

[0004] According to a first aspect of the present application, there is provided a support rod for a cleaning paper roll of a solder paste printer, the support rod comprising a first connection portion, a second connection portion and a main body portion, the first connection portion being connected to an apparatus and the second connection portion being connected to the apparatus, the main body portion being located between the first connection portion and the second connection portion in an axial direction of the support rod and being removably connected to the first connection portion and the second connection portion, whereby the main body portion can be connected to or separated from the apparatus, and the support rod can be rotationally driven.

[0005] In the support rod as described above, a first engagement portion and a second engagement portion are provided at a first end and a second end of the main body portion, respectively, a first fitting portion is provided at one end of the first connecting portion, and a second fitting portion is provided at one end of the second connecting portion, the first engagement portion can fit into the first fitting portion, and the second engagement portion can fit into the second fitting portion, limiting rotation of the main body portion relative to the first connecting portion or the second connecting portion.

[0006] In the support rod as described above, the first engagement portion is at least one recess formed so as to recess inwardly from the end face of the first end of the main body portion, the second engagement portion is at least one recess formed so as to recess inwardly from the end face of the second end of the main body portion, the first fitting portion is at least one convex portion formed so as to protrude outwardly from the end face of one end of the first connecting portion, and the second fitting portion is at least one convex portion formed so as to protrude outwardly from the end face of one end of the second connecting portion, and at least one convex portion of each of the first fitting portion and the second fitting portion can enter at least one corresponding recess of the first engagement portion and the second engagement portion of the main body portion, thereby limiting the rotation of the main body portion relative to the first connecting portion or the second connecting portion.

[0007] In the support rod as described above, the first engagement portion and the second engagement portion each have a plurality of recesses, which are uniformly distributed in the circumferential direction, and the first fitting portion and the second fitting portion each have a plurality of protrusions, which are uniformly distributed in the circumferential direction.

[0008] In the support rod as described above, the support rod is provided with a pair of fasteners, and the first connection portion and the second connection portion are each connected to the main body portion by a corresponding one of the pair of fasteners, and each of the pair of fasteners can move in the axial direction, thereby connecting the main body portion to the first connection portion or the second connection portion.

[0009] In the support rod as described above, each of the first connection portion and the second connection portion includes a guide segment, and a corresponding one of the pair of fasteners can pass through the guide segment and enter the main body portion, thereby connecting to the main body portion.

[0010] In the support rod as described above, the at least one recess extends radially of the support rod through a side wall of the body portion.

[0011] In the support rod as described above, each of the first connecting portion and the second connecting portion comprises a hollow segment, the hollow segment being connected to a side of the guide segment remote from the main body portion, The hollow segment includes a receiving cavity extending radially through the hollow segment relative to the support rod to form at least one window in a side wall of the hollow segment, and at least a portion of a corresponding one of the pair of fasteners is located within the receiving cavity.

[0012] In the support rod as described above, the support rod is used to support a cleaning paper roll in an electronic printer.

[0013] In the support rod as described above, the length of the main body is equal to or greater than the width of the cleaning paper roll.

[0014] According to a second aspect of the present application, a printer is further provided, the printer comprising a first stencil support, a second stencil support, and a pair of support rods, the first stencil support and the second stencil support extending in a first direction and arranged side by side, a stencil mounting space for mounting a stencil is formed between the first stencil support and the second stencil support, each of the pair of support rods extending in a second direction, the pair of support rods being located below the first stencil support and the second stencil support, each of the pair of support rods having a first connection portion and a second connection portion. The support rod has a connection portion and a main body portion, the first connection portion is connected to the printer, the second connection portion is connected to the printer, the main body portion is located between the first connection portion and the second connection portion in the axial direction of the support rod and is detachably connected to the first connection portion and the second connection portion, thereby allowing the main body portion to be connected to or separated from the printer, the main body portion passes through the stencil mounting space and thereby can be pulled out from above the first stencil support and the second stencil support, and the pair of support rods can be rotated.

[0015] In the printer as described above, the main body portion is located directly below the stencil mounting space, the first connection portion is located at least partially below the first stencil support, the second connection portion is located at least partially below the second stencil support, and the first direction is substantially perpendicular to the second direction.

[0016] In the printer as described above, a first engagement portion and a second engagement portion are provided at a first end and a second end of the main body portion, respectively, a first fitting portion is provided at one end of the first connection portion, and a second fitting portion is provided at one end of the second connection portion, the first engagement portion can be fitted into the first fitting portion, and the second engagement portion can be fitted into the second fitting portion, limiting rotation of the main body portion relative to the first connection portion or the second connection portion.

[0017] In the printer as described above, the first engagement portion is at least one recess formed so as to be recessed inward from an end face of the first end of the main body portion, the second engagement portion is at least one recess formed so as to be recessed inward from an end face of the second end of the main body portion, the first fitting portion is at least one protrusion formed so as to protrude outward from an end face of one end of the first connecting portion, and the second fitting portion is at least one protrusion formed so as to protrude outward from an end face of one end of the second connecting portion, and at least one protrusion of each of the first fitting portion and the second fitting portion can enter at least one corresponding recess of the first engagement portion and the second engagement portion of the main body portion, thereby restricting rotation of the main body portion relative to the first connecting portion or the second connecting portion.

[0018] In the printer as described above, the first engagement portion and the second engagement portion each have a plurality of recesses that are uniformly distributed in the circumferential direction, the first mating portion and the second mating portion each have a plurality of protrusions that are uniformly distributed in the circumferential direction, and each of the plurality of recesses extends radially of the corresponding support rod through a side wall of the main body portion.

[0019] In the printer as described above, each of the support rods has a pair of fasteners, the first connection portion and the second connection portion are each connected to the main body portion by a corresponding one of the pair of fasteners, each of the pair of fasteners can move in the axial direction thereby connecting the main body portion to the first connection portion or the second connection portion, each of the first connection portion and the second connection portion has a guide segment, and the corresponding one of the pair of fasteners can pass through the guide segment and enter the main body portion thereby being connected to the main body portion.

[0020] In the printer as described above, each of the first connection portion and the second connection portion comprises a hollow segment, the hollow segment being connected to a side of the guide segment remote from the main body portion, the hollow segment comprising an accommodating cavity extending radially through the hollow segment to each of the support rods and forming at least one window in a side wall of the hollow segment, and at least a portion of a corresponding one of the pair of fasteners is located within the accommodating cavity.

[0021] In the printer as described above, the length of the main body is equal to or greater than the width of the cleaning paper roll.

[0022] The support rods herein can be conveniently removed without having to move other components of the solder paste printer, thus facilitating replacement of the cleaning paper roll. [Brief description of the drawings]

[0023] [Figure 1A] FIG. 2 is a schematic top view of the cleaning paper roll support rod and surrounding components at its installation location in the solder paste printer of the present application. [Figure 1B] FIG. 1B is a schematic side view of the support rod of FIG. 1A and its installation position. [Figure 2A] FIG. 1B is a three-dimensional view of the support rod of FIG. 1A. [Figure 2B] FIG. 2B is an exploded view of the support rod of FIG. 2A. [Diagram 3] FIG. 2C is a three-dimensional view of the main body portion of FIG. 2B. [Figure 4A] FIG. 2 is a three-dimensional view of a first connection portion provided with a fastener according to the present application. [Figure 4B] FIG. 4B is an exploded view of the first connection portion and fastener of FIG. 4A. [Diagram 5] 1 is a schematic diagram of a solder paste printer according to the present application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] Various specific embodiments of the present application are described below with reference to the accompanying drawings, which form a part of this specification. Although directional terms such as "front", "rear", "upper", "lower", "left", "right", "top" and "bottom" are used in the present application to describe the orientation of various exemplary structures and elements of the present application, it should be understood that these terms are used herein merely for ease of description and are determined based on the exemplary orientation shown in the drawings. Since the embodiments disclosed in the present application can be arranged according to different orientations, these directional terms serve merely as explanations and should not be considered as limitations. Wherever possible, the same or similar reference numerals used in the present application refer to the same components.

[0025] FIG. 1A is a schematic top view of a cleaning paper roll support rod of a solder paste printer in the present application and surrounding components at its installation position, and FIG. 1B is a schematic side view of the support rod of FIG. 1A and surrounding components at its installation position.

[0026] 1A and 1B, the solder paste printer has a pair of stencil supports 112 and 113, and two sides of a stencil (not shown) are supported by the stencil supports 112 and 113, respectively. A pair of support rods 101 and 102 are provided below the stencil supports 112 and 113. When viewed from above the solder paste printer, both ends of the support rods 101 and 102 are obscured by the stencil supports 112 and 113, respectively, and the middle parts of the support rods 101 and 102 are located below the area where the stencil is located.

[0027] A stencil mounting space 115 is formed between the stencil supports 112 and 113, and the stencil mounting space 115 is used to mount a stencil. The stencil supports 112 and 113 extend in a first direction. The support rods 101 and 102 extend in a second direction (the axial direction of the support rods), and the first direction is substantially perpendicular to the second direction, i.e., the angle between the first direction and the second direction is 85 degrees to 95 degrees.

[0028] The support rods 101 and 102 are connected to two ends of the cleaning paper, respectively, and the cleaning paper is wound around the support rods to form a reel. The cleaning paper is wound in opposite directions on the support rods 101 and 102, and a cleaning paper working area is formed between the support rods 101 and 102, and the cleaning paper in the working area can clean the stencil. One end of each of the support rods 101 and 102 is connected to a driving means, so that the support rods 101 and 102 can rotate, thereby driving the cleaning paper in rotation. In operation, used cleaning paper can be wound around the support rods 101 or 102 by rotating the support rods 101 and 102 so that unused cleaning paper enters the working area.

[0029] To replace the cleaning paper, the support rods 101 and 102 need to be removed from the solder paste printer. In this application, due to the limited installation space, the support rods 101 and 102 need to be removed from above the stencil supports 112 and 113. In the process of using the solder paste printer, it is preferable not to remove the stencil supports 112 and 113, to avoid that the removal of the stencil supports 112 and 113 will change the stencil position, thereby affecting the processing accuracy of the circuit board. Since both ends of the support rods 101 and 102 are blocked by the stencil supports 112 and 113, respectively, making it difficult to remove them as a unit, the application provides multi-segment stencil support rods 101 and 102 to facilitate the replacement of the cleaning paper.

[0030] The support rods 101 and 102 have the same structure but are attached at different positions. The specific structure of the support rods is described below by taking the support rod 101 as an example.

[0031] FIG. 2A is a three-dimensional view of the support rod of FIG. 1A. FIG. 2B is an exploded view of the support rod of FIG. 2A. As shown in FIG. 2A and FIG. 2B, the support rod 101 is in the form of a long rod including a first connecting portion 201, a main body portion 202, a second connecting portion 203, and a pair of fasteners 251 and 252. The first connecting portion 201 and the second connecting portion 203 are both connected to a solder paste printer. The main body portion 202 is located between the first connecting portion 201 and the second connecting portion 203, and is connected to the first connecting portion 201 and the second connecting portion 203 by the fasteners 251 and 252. The main body portion 202 can be removed from the first connecting portion 201 and the second connecting portion 203. The cleaning paper is wrapped around the main body portion 202.

[0032] The main body 202 has a first end 211 and a second end 212, the first end 211 is provided with a first engagement portion 215, and the second end is provided with a second engagement portion 216. A first fitting portion 225 is provided at one end of the first connection portion 201, and a second fitting portion 226 is provided at one end of the second connection portion 203, the first engagement portion 215 can be fitted with the first fitting portion 225, and the second engagement portion 216 can be fitted with the second fitting portion 226, and the rotation of the main body 202 relative to the first connection portion 201 or the second connection portion 203 can be restricted. When the support rod 101 is rotationally driven by the driving means, the first connection portion 201, the main body 202, and the second connection portion 203 rotate together. The first connecting portion 201, the main body portion 202, and the second connecting portion 203 are removably connected by fasteners.

[0033] 3 is a three-dimensional view of the main body 202 of FIG. 2B, and as shown in FIG. 3, a gripping portion 308 is provided in an intermediate portion between the first end 211 and the second end 212 of the main body 202. The gripping portion 308 is provided with a plurality of serrated ribs for gripping the cleaning paper and preventing the cleaning paper from slipping relative to the main body 202. The first engagement portion 215 and the second engagement portion 216 have the same structure and are arranged symmetrically, and their structures will be described below using the first engagement portion 215 as an example.

[0034] As shown in FIG. 3 , the first end 211 has an end face 310, the end face 310 including a circular central region 311 and an annular peripheral region 312 disposed around the central region 311. The body portion 202 has a threaded hole 328 recessed axially inward from the central region 311 of the end face 310, the threaded hole 328 configured to mate with a fastener. The center of the threaded hole 328 coincides with the central axis of the support rod 101. The body portion 202 further includes four recesses 306 recessed inward from the peripheral region 312 of the end face 310. The four recesses 306 are evenly distributed in the circumferential direction. Each of the four recesses 306 extends radially of the support rod through a side wall 329 of the body portion 202, and thus the recesses 306 have openings in both the side wall 329 and the end face 310. In one embodiment of the present application, the side walls 361 and 362 are substantially parallel to each other, i.e., the recesses 306 have a uniform width in the radial direction. There is a gap between the recesses 306 and the screw holes 328 in the radial direction, i.e., the recesses 306 and the screw holes 328 are spaced apart. The first engagement portion 215 includes four recesses 306.

[0035] In another embodiment of the present application, the recesses 306 no longer extend through the side wall 329, and therefore openings are only provided in the end face 310. In another embodiment of the present application, the number of recesses 306 is a different number.

[0036] Each recess 306 is recessed inward by a certain distance in the radial direction, and the depth of the recess is 1 / 8 or more of the diameter of the end face of the main body. Each recess 306 has a pair of side walls 361 and 362 arranged opposite to each other, and when the support rod rotates, the protrusion of the first connection part abuts against the side wall 361 or the side wall 362, thereby rotating the main body.

[0037] Fig. 4A is a three-dimensional view of the first connection portion provided with a fastener in the present application, and Fig. 4B is an exploded view of the first connection portion and fastener in Fig. 4A, and as shown in Fig. 4A and Fig. 4B, the fastener 421 is located in the first connection portion 201. The first connection portion 201 includes a housing 401 and a fastener mounting block 402, and the housing 401 and the fastener mounting block 402 are configured as removable components to facilitate the installation of the fastener 421.

[0038] The first connecting portion 201 has a first end 441 and a second end 442, the first end 441 being configured to be connected to a solder paste printer device, and the second end 442 being configured to be connected to the main body portion 202 of the support rod. The second end 442 has four protrusions 406 formed to protrude outward in the axial direction from the end face 428, the four protrusions 406 being evenly distributed in the circumferential direction. The four protrusions 406 are close to the outside of the first connecting portion 201, the four protrusions 406 are shaped to match the four recesses 306 of the main body portion 202, and can be inserted into the four recesses 306. The four protrusions 406 constitute the second fitting portion 226.

[0039] In another embodiment of the present application, a recess is disposed on the main body portion 202 and a protrusion is provided on the first connecting portion 201, and fitting between the main body portion 202 and the first connecting portion 201 is also possible.

[0040] The housing 401 has a housing cavity 490 recessed inwardly from the end of the housing 401 adjacent the body portion. The housing includes a front segment 481 and a rear segment 482.

[0041] The first connection portion 201 includes a guide segment 431 and a hollow segment 432, the guide segment 431 proximate the second end 442 and the hollow segment proximate the first end 441. The guide segment 431 is composed of a housing front segment 481 and a fastener mounting block 402 disposed therein, the fastener mounting block 402 being connected to the housing 401 and filling the space within the front segment 481, such that the guide segment 431 forms a solid body. The fastener mounting block 402 is provided with a threaded hole extending axially therethrough for passing a fastener.

[0042] The hollow segment 432 has a receiving cavity 450 that extends radially through a sidewall of the hollow segment 432, thereby forming a window 460. The window 460 allows an operator to conveniently manipulate the fastener 431.

[0043] The fastener 421 includes a head 425 and a body 426. The head 425 has a larger diameter, and the body 426 is connected to the head 425 and has a smaller diameter. The head 426 is provided with a thread on the outside, which can be fitted with a threaded hole in the body and a threaded hole in the fastener mounting block 402. The body 426 has a larger length in the axial direction than the fastener mounting block 402, so that the fastener 421 can pass through the fastener mounting block 402 and enter the body 202. The fastener 421 is disposed in the first connecting portion 201, with its head located in the hollow segment and its body passing through the guide segment 431. The operator can operate the head 425 through the window 460, so that the fastener 421 moves axially relative to the first connecting portion 201. The head can enter the threaded hole in the body 202, thereby connecting the first connecting portion 201 to the body 202.

[0044] In the present application, in order to facilitate the attachment of the fastener 421, the first connecting portion 201 is provided with a removable fastener mounting block 402, and the fastener 421 is first fitted into the fastener mounting block 402, and then the fastener mounting block 402 and the fastener 421 are fitted together into the housing 401. The fastener mounting block 402 can be fixedly connected to the housing 401 by welding or screw connection, etc.

[0045] In the present application, the guide segment 431 has a certain length to ensure that the fastener 421 does not easily tilt by axial movement in the process of rotation, so that the first connecting portion 201 and the body portion 202 are easy to be engaged and disengaged with each other. In one embodiment of the present application, the length of the guide segment 431 is 30 mm or more.

[0046] In the present application, the engagement between the convex portion and the concave portion prevents relative rotation between the main body portion 202 and the first connecting portion 201. When the support rod rotates, the first connecting portion 201 drives the main body portion 202 mainly by relying on the engagement between the convex portion and the concave portion, rather than relying on threads or other connection methods, so that loosening or tightening due to the action of force when the support rod rotates can be avoided.

[0047] The structure of second connecting portion 203 is similar to that of first connecting portion 201, and therefore, description thereof will not be repeated here.

[0048] In the present application, the length of the main body 202 is substantially equal to the distance between the stencil supports 112 and 113. The cleaning paper roll is wound around the main body 202, and the joint between the main body 202 and the first connecting portion 201 or the second connecting portion 203 is not covered by the cleaning paper roll or is only slightly covered by the cleaning paper roll. That is, the length of the main body 202 is equal to or greater than the width of the cleaning paper in the axial direction of the support rod, or is slightly smaller than the width of the cleaning paper. Therefore, the main body 202 can be easily removed and attached, and interference with the cleaning paper roll during removal and attachment can be avoided.

[0049] In the present application, the two ends of the support rod are provided with elastic elements, which can move a small distance in the axial direction, but this is not enough to pull the support rod directly out of the device. When the support rod needs to be disassembled, the fasteners 421 in the first connecting part 201 and the second connecting part 203 are rotated so that they move away from the main part 202, and then the main part 202 is moved a very small distance in the axial direction so that its recess moves away from the protrusion of the corresponding connecting part, and then moved in the opposite direction. This allows the main part 202 to be disassembled. Then, the cleaning paper roll wound around the main part 202 can be replaced.

[0050] The support rod in the present application can be easily removed and installed without moving the stencil support, and can accommodate high processing precision requirements.

[0051] FIG. 5 is a schematic diagram of the solder paste printer in the present application. Referring to FIG. 1A and FIG. 5, the solder paste printer includes a pair of stencil supports 112 and 113 arranged opposite to each other, and a stencil mounting space 115 is formed between the stencil supports 112 and 113. The stencil mounting space 115 is used to mount a stencil. A solder application device 501 is located above the stencil mounting space 115. A cleaning paper roll device 502 is located below the stencil mounting space 115. The cleaning paper roll device includes a pair of support rods 101 and 102 and a cleaning paper roll wound around the support rods 101 and 102. The axial direction of the support rods 101 and 102 is substantially perpendicular to the extension direction of the stencil supports 112 and 113. The main body portion 202 of each of the support rods 101 and 102 is located directly below the stencil mounting space. At least a portion of the first connecting portion 201 and at least a portion of the second connecting portion 203 are located directly below the stencil supports 112 and 113, with the inner end of the first connecting portion 201 extending beyond or flush with the inner edge of the stencil support 112, and the inner end of the second connecting portion 203 extending beyond or flush with the inner edge of the stencil support 113. When the main body portion 202 is separated from the first connecting portion 201 and the second connecting portion 202, an operator can pull the main body portion 202 out from above the stencil mounting space 115.

[0052] Although the present disclosure has been described in connection with the example embodiments outlined above, various alternatives, modifications, variations, improvements, and / or substantial equivalents, whether already known or currently or soon foreseeable, may be apparent to those skilled in the art. In addition, the technical effects and / or technical problems described herein are illustrative rather than limiting, and thus the disclosure herein may be used to solve other technical problems and have other technical effects. Thus, the example embodiments of the present disclosure as described above are intended to be illustrative and not limiting. Various changes can be made without departing from the spirit or scope of the present disclosure. Thus, the present disclosure is intended to include all known or previously developed alternatives, modifications, variations, improvements, and / or substantial equivalents.

Claims

1. In the support rod, A first connection part (201) connected to the device; A second connection (203) connected to the device; a main body portion (202) located between the first connecting portion (201) and the second connecting portion (203) in the axial direction of the support rod and removably connected to the first connecting portion (201) and the second connecting portion (203), such that the main body portion (202) is connectable to or detachable from the device, and the support rod is rotatably drivable; A support rod comprising:

2. The support rod of claim 1, characterized in that a first engagement portion (215) and a second engagement portion (216) are provided at a first end (211) and a second end (212) of the main body portion (202), a first fitting portion (225) is provided at one end of the first connection portion (201), and a second fitting portion (226) is provided at one end of the second connection portion (203), and the first engagement portion (215) is engageable with the first fitting portion (225) and the second engagement portion (216) is engageable with the second fitting portion (226) to limit rotation of the main body portion (202) relative to the first connection portion (201) or the second connection portion (203).

3. The first engagement portion (215) is at least one recess (306) formed so as to be recessed inward from an end face of the first end of the main body portion (202), the second engagement portion (216) is at least one recess (306) formed so as to be recessed inward from an end face of the second end of the main body portion (202), the first fitting portion (225) is at least one protrusion (406) formed so as to protrude outward from an end face of one end of the first connecting portion (201), and the second fitting portion (226) is at least one protrusion (406) formed so as to protrude outward from an end face of one end of the second connecting portion (203).

3. The support rod according to claim 2, characterized in that the at least one protrusion (406) is formed to protrude outward from an end face at one end of the first fitting portion (225) and the second fitting portion (226), and the at least one protrusion (406) of each of the first fitting portion (225) and the second fitting portion (226) is capable of entering at least one corresponding recess (306) of the first engagement portion (215) and the second engagement portion (216) of the main body portion (202), thereby restricting rotation of the main body portion (202) relative to the first connection portion (201) or the second connection portion (203).

4. the first engagement portion (215) and the second engagement portion (216) each include a plurality of recesses (306), the plurality of recesses (306) being uniformly distributed in a circumferential direction; the first fitting portion (225) and the second fitting portion (226) each include a plurality of protrusions (406), the plurality of protrusions (406) being uniformly distributed in a circumferential direction; Each of the plurality of recesses (306) extends radially of the support rod through a side wall (329) of the body portion (202).

4. The support rod according to claim 3.

5. the support rod comprises a pair of fasteners (421), the first connection portion (201) and the second connection portion (203) are each connected to the body portion (202) by a corresponding one of the pair of fasteners (421), each of the pair of fasteners (421) being movable in the axial direction, thereby allowing the body portion (202) to be connected to the first connection portion (201) or the second connection portion (203); Each of the first connecting portion (201) and the second connecting portion (203) includes a guide segment (431), and a corresponding one of the pair of fasteners (421) can pass through the guide segment (431) and enter into the body portion (202), thereby being connected to the body portion (202).

4. The support rod according to claim 3.

6. Each of the first connecting portion (201) and the second connecting portion (203) comprises a hollow segment (432), the hollow segment (432) being connected to a side of the guide segment (431) away from the main body portion (202); the hollow segment (432) includes a receiving cavity (450) that extends through the hollow segment (432) in a radial direction of the support rod to form at least one window (460) in a side wall of the hollow segment (432), and at least a portion of a corresponding one of the pair of fasteners (421) is located within the receiving cavity (450); 6. The support rod according to claim 5.

7. the support rod is used to support a cleaning paper roll in an electronic printer; The length of the main body (202) is equal to or greater than the width of the cleaning paper roll.

2. The support rod according to claim 1.

8. In the printer, a first stencil support (112) and a second stencil support (113) extending in a first direction and arranged side by side, wherein a stencil mounting space (115) for mounting a stencil is formed between the first stencil support (112) and the second stencil support (113); a pair of support rods (101, 102), each of the pair of support rods (101, 102) extending in a second direction, the pair of support rods (101, 102) positioned below the first stencil support (112) and the second stencil support (113), each of the pair of support rods (101, 102) A first connection unit (201) connected to the printer; A second connection part (203) connected to the printer; a main body portion (202) located between the first connecting portion (201) and the second connecting portion (203) in the axial direction of the support rod and removably connected to the first connecting portion (201) and the second connecting portion (203), thereby allowing the main body portion (202) to be connected to the printer or separated from the printer; A pair of support rods (101, 102) each having Equipped with The main body (202) can pass through the stencil mounting space (115), and can be pulled out from above the first stencil support (112) and the second stencil support (113), and the pair of support rods (101, 102) can be rotated. A printer characterized by:

9. the main body portion (202) is located directly below the stencil mounting space (115), the first connection portion (201) is located at least partially below the first stencil support (112), and the second connection portion (203) is located at least partially below the second stencil support (113); The first direction is substantially perpendicular to the second direction.

9. The printer according to claim 8.

10. 9. The printer of claim 8, wherein a first engagement portion (215) and a second engagement portion (216) are provided at a first end (211) and a second end (212) of the main body portion (202), a first fitting portion (225) is provided at one end of the first connection portion (201), and a second fitting portion (226) is provided at one end of the second connection portion (203), and the first engagement portion (215) is engageable with the first fitting portion (225) and the second engagement portion (216) is engageable with the second fitting portion (226) to limit rotation of the main body portion (202) relative to the first connection portion (201) or the second connection portion (203).

11. The first engagement portion (215) is at least one recess (306) formed so as to be recessed inward from an end face of the first end of the main body portion (202), the second engagement portion (216) is at least one recess (306) formed so as to be recessed inward from an end face of the second end of the main body portion (202), the first fitting portion (225) is at least one protrusion (406) formed so as to protrude outward from an end face of one end of the first connecting portion (201), and the second fitting portion (226) is at least one protrusion (406) formed so as to protrude outward from an end face of one end of the second connecting portion (203).

11. The printer according to claim 10, characterized in that the at least one protrusion (406) is formed to protrude outward from an end face at one end of the first fitting portion (225) and the second fitting portion (226), and the at least one protrusion (406) of each of the first fitting portion (225) and the second fitting portion (226) is capable of entering at least one corresponding recess (306) of the first engagement portion (215) and the second engagement portion (216) of the main body portion (202), thereby restricting rotation of the main body portion (202) relative to the first connection portion (201) or the second connection portion (203).

12. the first engagement portion (215) and the second engagement portion (216) each include a plurality of recesses (306), the plurality of recesses (306) being uniformly distributed in a circumferential direction; the first fitting portion (225) and the second fitting portion (226) each include a plurality of protrusions (406), the plurality of protrusions (406) being uniformly distributed in a circumferential direction; Each of the recesses (306) extends radially through a side wall (329) of the body portion (202) and in a radial direction of the corresponding support rod (101, 102). The printer according to claim 11 .

13. Each of the support rods (101, 102) comprises a pair of fasteners (421), and each of the first connection portion (201) and the second connection portion (203) is connected to the main body portion (202) by a corresponding one of the pair of fasteners (421), and each of the pair of fasteners (421) is movable in the axial direction, thereby connecting the main body portion (202) to the first connection portion (201) or the second connection portion (203); Each of the first connecting portion (201) and the second connecting portion (203) includes a guide segment (431), and a corresponding one of the pair of fasteners (421) can pass through the guide segment (431) and enter into the body portion (202), thereby being connected to the body portion (202). The printer according to claim 11 .

14. Each of the first connecting portion (201) and the second connecting portion (203) comprises a hollow segment (432), the hollow segment (432) being connected to a side of the guide segment (431) away from the main body portion (202); the hollow segment (432) includes a receiving cavity (450) that extends through the hollow segment (432) in a radial direction of each of the support rods to form at least one window (460) in a side wall of the hollow segment (432), and at least a portion of a corresponding one of the pair of fasteners (421) is located within the receiving cavity (450); 14. The printer of claim 13.

15. 9. The printer of claim 8, wherein the length of the body portion (202) is equal to or greater than the width of the cleaning paper roll.

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