Detection device and printing apparatus

Abstract

The embodiment of the present application relates to the printing technical field, and discloses especially a detection device and a printing equipment, the detection device comprises a support, a laser detection mechanism and an adjusting mechanism, the support comprises a stand column and a crossbeam installed on the stand column, the crossbeam can be moved along the height direction relative to the stand column, the crossbeam and the stand column jointly enclose a detection space, the laser detection mechanism is arranged on the crossbeam and is used for emitting detection light to the detection space and receiving the detection light passing through the detection space, the adjusting mechanism comprises an adjusting assembly and at least one adjusting gasket, the adjusting gasket is detachably arranged between the crossbeam and the stand column, the adjusting assembly comprises a driving rod, a sliding rod and a sleeve, one end of the driving rod is rotationally connected to the stand column, the other end of the driving rod is fixedly connected with one end of the sliding rod, the other end of the sliding rod is connected with the crossbeam, and the sleeve is fixed to the stand column and sleeved on the sliding rod. The present application realizes convenient lifting through the adjusting assembly, and the height adjustment can be realized by changing the number of adjusting gaskets, so that the efficiency and accuracy are improved.

Description

Technical Field

[0001] This application relates to the field of printing technology, and in particular to a detection device and printing equipment. Background Technology

[0002] A textile digital printer is a high-precision, high-efficiency printing device that uses digital control technology to precisely spray ink onto the surface of fabric or other printing media transported by a guide belt, thereby printing patterns or text. During the printing process, when the printing media has defects such as curling edges, wrinkles, or inclusions of foreign matter, the printhead is prone to colliding with the media or foreign matter, leading to printhead or media damage. Currently, defects in the printing media are mainly identified in advance using laser-based detection devices to avoid collisions. The detection device includes a laser sensor and a bracket. The laser sensor is mounted on the bracket, which is positioned above the guide belt of the printing media and is fixed with bolts.

[0003] In implementing the embodiments of this application, the inventors discovered that when the detection device adopts a bolt-fixed structure, when the height of the laser sensor needs to be adjusted for printing media of different materials and thicknesses, tools are needed to loosen the bolts, manually calibrate them repeatedly, and then tighten them again, which is cumbersome and inefficient. Utility Model Content

[0004] In view of the above problems, embodiments of this application provide a detection device and a printing device that overcome or at least partially solve the above problems.

[0005] To solve the above-mentioned technical problems, this application adopts the following technical solution: A detection device is provided, including a support, a laser detection mechanism, and an adjustment mechanism. The support includes a column and a crossbeam. The crossbeam is mounted on the column and is movable relative to the column along its height direction. The crossbeam and the column together enclose a detection space. The laser detection mechanism is disposed on the crossbeam and is used to emit detection light into the detection space and receive detection light passing through the detection space. The adjustment mechanism includes an adjustment component and at least one adjustment shim, which is movable relative to the column along its height direction. The adjusting shim is detachably disposed between the crossbeam and the column. The adjusting assembly includes a drive rod, a sliding rod, and a sleeve. One end of the drive rod is rotatably connected to the column, and the other end of the drive rod is fixedly connected to one end of the sliding rod. The other end of the sliding rod is connected to the crossbeam. The sleeve is fixed to the column and is sleeved on the sliding rod. When the drive rod rotates relative to the column, the drive rod drives the sliding rod to slide relative to the sleeve along the height direction of the column, thereby driving the crossbeam and the laser detection mechanism to move along the height direction of the column.

[0006] In some embodiments, the outer wall of the sliding rod is provided with a first step and a second step, the second step being located at the other end of the sliding rod. The adjusting assembly further includes a sliding frame and a spring. The sliding frame is fixedly connected to the crossbeam. The sliding frame is provided with a through hole for the other end of the sliding rod to pass through. The surface of the sliding frame facing away from the other end of the sliding rod is used to abut against the first step. The spring is sleeved on the sliding rod, one end of the spring abutting against the surface of the sliding frame facing the other end of the sliding rod, and the other end of the spring abutting against the second step.

[0007] In some embodiments, the adjusting assembly further includes a connecting rod, one end of which is fixedly connected to the other end of the drive rod, and the other end of which is rotatably connected to the sliding rod.

[0008] In some embodiments, the column has a side groove on the side facing the crossbeam, the side groove being used to receive the end of the crossbeam, and the adjusting shim is detachably disposed between the bottom surface of the side groove and the crossbeam along the height direction of the column.

[0009] In some embodiments, the adjustment assembly further includes a handle, which is fixedly connected to one end of the drive rod.

[0010] In some embodiments, the detection device further includes a protective cover that covers the bracket, the laser detection mechanism, and the adjustment mechanism.

[0011] In some embodiments, along the length of the crossbeam, one end of the protective cover is provided with a first through hole and a second through hole, the first through hole being provided corresponding to the handle and the drive rod, and the second through hole being provided corresponding to the adjusting shim.

[0012] In some embodiments, the adjusting shim is provided with a hanging hole; The bracket is provided with a first protrusion, which is used for the hanging hole of the adjusting pad to pass through.

[0013] In some embodiments, the protective cover is provided with a second protrusion for passing through the hanging hole of the adjusting pad.

[0014] In some embodiments, the laser detection mechanism includes a light emitter and a light receiver. Along the length of the crossbeam, the light emitter and the light receiver are respectively disposed on both sides of the detection space. The light emitter is used to emit detection light into the detection space, and the light receiver is used to receive the detection light passing through the detection space.

[0015] In some embodiments, the laser detection mechanism further includes a rotating member, one end of which is rotatably connected to the crossbeam, and the other end of which extends to the detection space. The rotating member is disposed between the light emitter and the light receiver, and the detection light beam is used to detect whether the rotating member is rotating.

[0016] To solve the above-mentioned technical problems, another technical solution adopted in this application is to provide a printing device, including the above-mentioned detection device.

[0017] The beneficial effects of this application embodiment are as follows: Unlike the prior art, this application embodiment provides a detection device and a printing device. The detection device includes a support, a laser detection mechanism, and an adjustment mechanism. The support includes a column and a crossbeam. The crossbeam is mounted on the column and can move relative to the column along its height. The crossbeam and the column together enclose a detection space. The laser detection mechanism is disposed on the crossbeam and is used to emit detection light into the detection space and receive detection light passing through the detection space. The adjustment mechanism includes an adjustment component and at least one adjustment shim. In the height direction of the column, the adjusting shims are detachably disposed between the crossbeam and the column. The adjusting assembly includes a drive rod, a sliding rod, and a sleeve. One end of the drive rod is rotatably connected to the column, and the other end of the drive rod is fixedly connected to one end of the sliding rod. The other end of the sliding rod is connected to the crossbeam. The sleeve is fixed to the column and sleeved on the sliding rod. When the drive rod rotates relative to the column, it drives the sliding rod to slide relative to the sleeve along the height direction of the column, thereby driving the crossbeam and the laser detection mechanism to move along the height direction of the column. This application achieves convenient lifting and lowering of the crossbeam and the laser detection mechanism through the adjusting assembly, and can achieve height adjustment by changing the number of adjusting shims, simplifying the operation process and improving work efficiency. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0019] Figure 1 This is a perspective view of a detection device provided in an embodiment of this application; Figure 2 This is an exploded view of a detection device provided in an embodiment of this application; Figure 3This is a perspective view of a detection device provided in an embodiment of this application with its protective cover removed; Figure 4 yes Figure 3 A magnified view of a portion of region A in the middle. Detailed Implementation

[0020] To facilitate understanding of this application, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected" to another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this specification are for illustrative purposes only.

[0021] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0022] Please see Figure 1 and Figure 2 The detection device 1000 includes a support 1, a laser detection mechanism 2, and an adjustment mechanism 3. Both the laser detection mechanism 2 and the adjustment mechanism 3 are mounted on the support 1. The support 1 has a detection space 10 through which the printing medium passes. The laser detection mechanism 2 emits detection light into the detection space 10 and receives the detection light passing through it, thereby determining whether the printing medium has a height increase defect by observing changes in the detection light. The adjustment mechanism 3 adjusts the height of the laser detection mechanism 2 relative to the printing medium.

[0023] Regarding the aforementioned bracket 1, please refer to some embodiments. Figure 2 The support frame 1 includes a column 11 and a crossbeam 12. The crossbeam 12 is mounted on the column 11, and the crossbeam 12 and the column 11 together enclose a detection space 10 for the printing medium to pass through. The crossbeam 12 is used to mount the laser detection mechanism 2. The crossbeam 12 can move relative to the column 11 along the height direction, thereby driving the laser detection mechanism 2 to move along the height direction of the column 11. The height direction of the column 11 is perpendicular to the length direction of the crossbeam 12.

[0024] In some embodiments, there are two columns 11. Along the length of the crossbeam 12, both ends of the crossbeam 12 are connected to two columns 11 respectively, so that the two columns 11 provide more stable support for the crossbeam 12 and the laser detection mechanism 2.

[0025] For the laser detection mechanism 2 described above, please refer to some embodiments. Figure 2 The laser detection mechanism 2 includes a light emitter 21 and a light receiver 22. Along the length of the crossbeam 12, the light emitter 21 and the light receiver 22 are respectively positioned on both sides of the detection space 10. The light emitter 21 emits detection light into the detection space 10, and the light receiver 22 receives the detection light passing through the detection space 10. The control system of the printing equipment determines whether the printing medium has height-increasing defects such as warping, creases, or attached debris based on changes in the emitted and received light intensity signals. For example, if the detection light emitted by the light emitter 21 passes through the detection space 10 at a preset intensity, and the difference between the light intensity signal received by the light receiver 22 and the emitted light intensity signal is within a preset normal threshold range, then it is determined that the printing medium has no height-increasing defects, and the printing equipment continues to operate normally. If the difference between the received and emitted light intensity signals exceeds a preset abnormal threshold, then it is determined that the printing medium has height-increasing defects, and the control system controls the conveyor belt to stop conveying, the print head to stop ink ejection, etc., to prevent damage caused by collision between the abnormal part and the print head.

[0026] In some embodiments, the laser detection mechanism 2 further includes a rotating member 23, one end of which is rotatably connected to the crossbeam 12, and the other end of which extends into the detection space 10. The distance between the rotating member 23 and the surface of the printing medium is less than or equal to a preset printing distance between the printhead and the surface of the printing medium. The rotating member 23 is disposed between the light emitter 21 and the light receiver 22, and the detection light is used to detect whether the rotating member 23 rotates. In the initial state, the detection light reaches the light receiver 22 after passing through the rotating member 23, and the difference between the light intensity signal received by the light receiver 22 and the emitted light intensity signal is within a preset normal threshold range. When there is a height increase defect in the printing medium, the abnormal part touches the rotating member 23, causing the rotating member 23 to rotate around its rotatable connection with the crossbeam 12, and the difference between the received light intensity signal and the emitted light intensity signal changes, exceeding the preset abnormal threshold. By performing dual detection of light blockage after physical triggering through the rotating member 23, the reliability of height increase defect detection is improved, and the risk of false triggering of small, soft, and low-damage foreign objects by simple laser detection is reduced.

[0027] In some embodiments, please continue reading Figure 2 The rotating component 23 is provided with a protrusion 231, which may or may not overlap with the propagation direction of the detection light. By detecting the obstruction of the detection light passing through the rotating component 23, it is determined whether the rotating component 23 is rotating, thereby determining whether an increase defect exists.

[0028] In some embodiments, there are multiple rotating members 23, which are sequentially arranged on the crossbeam 12 along the length direction of the crossbeam 12, and the height of the multiple rotating members 23 is the same as the initial angle relative to the crossbeam 12.

[0029] Regarding the aforementioned adjustment mechanism 3, please refer to some embodiments. Figures 2 to 4 The adjustment mechanism 3 includes an adjustment component 31 and at least one adjustment shim 32. The adjustment component 31 is used to drive the crossbeam 12 to move along the height direction of the column 11. The adjustment shim 32 is detachably disposed between the crossbeam 12 and the column 11, and the height can be adjusted by changing the number of adjustment shims 32 between the crossbeam 12 and the column 11.

[0030] In some embodiments, please refer to Figure 3 and Figure 4 The adjustment assembly 31 includes a drive rod 311, a sliding rod 312, and a sleeve 313. One end of the drive rod 311 is rotatably connected to the column 11, and the other end of the drive rod 311 is fixedly connected to one end of the sliding rod 312. The other end of the sliding rod 312 is connected to the crossbeam 12. The sleeve 313 is fixed to the column 11 and is fitted onto the sliding rod 312. When the drive rod 311 rotates relative to the column 11, it drives the sliding rod 312 to slide relative to the sleeve 313 along the height direction of the column 11, thereby driving the crossbeam 12 and the laser detection mechanism 2 to move along the height direction of the column 11, realizing the rapid and convenient lifting and lowering of the crossbeam 12. The adjusting shims 32 are provided with a preset thickness. By increasing or decreasing the number of adjusting shims 32, the height of the crossbeam 12 can be accurately adjusted, improving the adjustment accuracy of the detection reference height and the ease of operation.

[0031] In some embodiments, please refer to Figure 3 and Figure 4 A side groove 111 is provided on the side of the column 11 facing the crossbeam 12, and the side groove 111 is used to receive the end of the crossbeam 12. Along the height direction of the column 11, an adjusting shim 32 is detachably provided between the bottom surface of the side groove 111 and the crossbeam 12. The side groove 111 is used to guide and limit the crossbeam 12 and improve structural stability.

[0032] In some embodiments, when the other end of the drive rod 311 faces away from the sliding rod 312, and the relative angle between the drive rod 311 and the column 11 reaches the minimum clamping angle, the adjusting assembly 31 is in a self-locking state, reducing the height deviation of the crossbeam 12 caused by external force vibration and improving the long-term reliability of the adjusting mechanism 3 under complex working conditions. When height adjustment is required, the other end of the drive rod 311 is rotated towards the sliding rod 312 to release the self-locking state of the adjusting mechanism 3.

[0033] In some embodiments, please refer to Figure 4 The adjustment assembly 31 also includes a connecting rod 314, one end of which is fixedly connected to the other end of the drive rod 311, and the other end of which is rotatably connected to one end of the sliding rod 312, thereby improving the smoothness of the sliding rod 312 being driven to move along the height direction of the column 11. There are two connecting rods 314, which are located on both sides of the drive rod 311 and the sliding rod 312, respectively.

[0034] In some embodiments, the outer side wall of the sliding rod 312 is provided with a first step 3121 and a second step 3122, the second step 3122 being located at the other end of the sliding rod 312.

[0035] In some embodiments, the adjustment mechanism 3 further includes a sliding frame 315 and a spring 316. The sliding frame 315 is fixedly connected to the crossbeam 12. The sliding frame 315 is provided with a through hole for the other end of the sliding rod 312 to pass through. A first step 3121 is used to abut against the surface of the sliding frame 315 opposite to the other end of the sliding rod 312. The spring 316 is sleeved on the sliding rod 312. One end of the spring 316 abuts against the surface of the sliding frame 315 facing the other end of the sliding rod 312, and the other end of the spring 316 abuts against the second step 3122. When the sliding rod 312 is driven by the drive rod 311 to slide along the height direction of the column 11, the sliding rod 312 abuts against the sliding frame 315 through the first step 3121, causing the sliding frame 315 and the crossbeam 12 to rise and fall synchronously. At the same time, the spring 316 is always in a compressed state, and the axial elastic restoring force generated continuously acts on the sliding frame 315 with downward pressure, thereby applying a stable downward pressure to the crossbeam 12 and improving the reliability of height adjustment.

[0036] In some embodiments, the adjustment mechanism 3 further includes a handle 317, which is fixedly connected to one end of the drive rod 311. The handle 317 is used by the operator to grip and apply force. By rotating the handle 317, the drive rod 311 is rotated synchronously, thereby driving the sliding rod 312 to rise and fall along the sleeve 313, improving the ease of height movement of the crossbeam 12. The outer wall of the handle 317 is provided with anti-slip texture to increase the friction when gripping.

[0037] In some embodiments, the end of the crossbeam 12 is provided with a positioning protrusion 121, which is used to abut against the adjusting shim 32 to achieve positioning of the crossbeam 12 and the adjusting shim 32.

[0038] In some embodiments, please refer to Figure 3 and Figure 4 The adjusting shim 32 is provided with a hanging hole. The bracket 1 is provided with a first protrusion 113, which is used to pass through the hanging hole of the adjusting shim 32, so that the unused adjusting shim 32 can be hung and stored in the first protrusion 113 to prevent the adjusting shim 32 from being lost or scattered.

[0039] In some embodiments, the column 11 has an opening 112 on one side of the side groove 111 for placing and removing the adjusting shim 32. A first protrusion 113 extends along the outer wall of the column 11 and is located near the opening 112, facilitating quick access to or storage of the shim during adjustment operations. In some examples, the first protrusion 113 is integrally formed with the column 11. In other examples, the first protrusion 113 is a screw disposed on the column 11.

[0040] In some embodiments, please refer to Figure 1 and Figure 2 The detection device 1000 also includes a protective cover 4, which covers the bracket 1, the laser detection mechanism 2 and the adjustment mechanism 3, and plays a protective role such as dust prevention and interference prevention.

[0041] In some embodiments, please refer to Figure 2 Along the length of the crossbeam 12, one end of the protective cover 4 is provided with a first through hole 41 and a second through hole 42. The first through hole 41 is corresponding to the handle 317 and the drive rod 311, and the second through hole 42 is corresponding to the adjusting shim 32 and the opening 112. Through the first through hole 41 and the second through hole 42, the operator can directly hold the handle 317 and pick up and put down the adjusting shim 32 to perform height adjustment without disassembling the protective cover 4, thus improving the convenience of adjustment.

[0042] In some embodiments, the protective cover 4 further includes a removable first cover plate 43 and a second cover plate 44, the first cover plate 43 being used to close the first through hole 41 and the second cover plate 44 being used to close the second through hole 42.

[0043] In some embodiments, please refer to Figure 1 and Figure 2 The protective cover 4 is provided with a second protrusion 45, which is used for the hanging hole of the adjusting shim 32 to pass through, so that the unused adjusting shim 32 can be hung and stored in the second protrusion 45. The second protrusion 45 extends along the outer side wall of the protective cover 4 and is located near the second through hole 42. In some examples, the second protrusion 45 is integrally formed with the protective cover 4. In other examples, the second protrusion 45 is a screw provided on the protective cover 4.

[0044] During the height adjustment of the detection device 1000, the operator first removes the first cover plate 43 at the first through hole 41, exposing the handle 317 inside. Then, by grasping the handle 317 and applying rotational force, the drive rod 311 rotates around its rotational connection point with the column 11. When the other end of the drive rod 311 rotates towards the sliding rod 312, the adjusting mechanism 3 releases its self-locking state. At this time, the drive rod 311 drives the sliding rod 312 to slide within the sleeve 313 along the height direction of the column 11. The first step 3121 on the outer wall of the sliding rod 312, through its abutment with the edge of the through hole of the sliding frame 315, transmits axial displacement to the sliding frame 315, thereby driving the crossbeam 12, which is fixedly connected to the sliding frame 315, to rise and fall synchronously. Next, the operator removes the second cover plate 44 at the second through hole 42, exposing the opening 112, and achieves precise adjustment by adding or removing the adjusting shims 32. Then, the operator rotates the handle 317 in the opposite direction to make the other end of the drive rod 311 rotate away from the sliding rod 312 until the angle between the drive rod 311 and the column 11 decreases until the adjustment mechanism 3 re-enters the self-locking state.

[0045] In this embodiment, the detection device 1000 includes a support 1, a laser detection mechanism 2, and an adjustment mechanism 3. The support 1 includes a crossbeam 12 and a column 11. The crossbeam 12 is mounted on the column 11 and can move relative to the column 11 along its height direction. The column 11 and the crossbeam 12 together enclose a detection space 10 for the printing medium to pass through. The laser detection mechanism 2 is disposed on the crossbeam 12. The adjustment mechanism 3 includes an adjustment component 31 and an adjustment shim 32. The adjustment shim 32 is disposed between the crossbeam 12 and the column 11. The adjustment component 31 includes a drive rod 311, a sliding rod 312, and a sleeve 313. One end of the drive rod 311 is rotatably connected to the column 11, and the other end of the drive rod 311 is fixedly connected to one end of the sliding rod 312. The other end of the sliding rod 312 is connected to the crossbeam 12. The sleeve 313 is fixed to the column 11 and sleeved on the sliding rod 312. When the drive rod 311 rotates relative to the column 11, it drives the sliding rod 312 to slide relative to the sleeve 313 along the height direction of the column 11, thereby moving the crossbeam 12 along the height direction of the column 11. The crossbeam 12 and the laser detection mechanism 2 can be easily raised and lowered by adjusting the assembly 31, and the height can be adjusted by changing the number of adjusting shims 32, simplifying the operation process and improving work efficiency.

[0046] This application also provides an embodiment of a printing device, which includes the detection device 1000 described above. The structure and function of the detection device 1000 can be found in the above embodiments, and will not be described in detail here.

[0047] It should be noted that while preferred embodiments of this application are provided in the specification and accompanying drawings, this application can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are not intended to impose additional limitations on the content of this application; their purpose is to provide a more thorough and comprehensive understanding of the disclosure of this application. Furthermore, the above-described technical features can be combined with each other to form various embodiments not listed above, all of which are considered to be within the scope of this application's specification. Moreover, those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A detection device, characterized in that, include: The support includes a column and a crossbeam, the crossbeam being mounted on the column and movable relative to the column along the height direction of the column, the crossbeam and the column together enclosing a detection space; A laser detection mechanism is disposed on the crossbeam. The laser detection mechanism is used to emit detection light into the detection space and receive detection light passing through the detection space. An adjustment mechanism includes an adjustment component and at least one adjustment shim. Along the height direction of the column, the adjustment shim is detachably disposed between the crossbeam and the column. The adjustment component includes a drive rod, a sliding rod, and a sleeve. One end of the drive rod is rotatably connected to the column, and the other end of the drive rod is fixedly connected to one end of the sliding rod. The other end of the sliding rod is connected to the crossbeam. The sleeve is fixed to the column and is sleeved on the sliding rod. When the drive rod rotates relative to the column, the drive rod drives the sliding rod to slide relative to the sleeve along the height direction of the column, thereby driving the crossbeam and the laser detection mechanism to move along the height direction of the column.

2. The detection device according to claim 1, characterized in that, The outer wall of the sliding rod is provided with a first step and a second step, the second step being located at the other end of the sliding rod; The adjusting assembly further includes a sliding frame and a spring. The sliding frame is fixedly connected to the crossbeam. The sliding frame has a through hole for the other end of the sliding rod to pass through. The surface of the sliding frame facing away from the other end of the sliding rod is used to abut against the first step. The spring is sleeved on the sliding rod, with one end of the spring abutting against the surface of the sliding frame facing away from the other end of the sliding rod, and the other end of the spring abutting against the second step; and / or The adjustment assembly also includes a connecting rod, one end of which is fixedly connected to the other end of the drive rod, and the other end of which is rotatably connected to the sliding rod.

3. The detection device according to claim 1, characterized in that... , The column has a side groove on the side facing the crossbeam, which is used to receive the end of the crossbeam. Along the height direction of the column, the adjusting shim is detachably disposed between the bottom surface of the side groove and the crossbeam.

4. The detection device according to any one of claims 1-3, characterized in that... , The adjustment assembly also includes a handle, which is fixedly connected to one end of the drive rod.

5. The detection device according to claim 4, characterized in that, The detection device also includes a protective cover, which covers the bracket, the laser detection mechanism, and the adjustment mechanism.

6. The detection device according to claim 5, characterized in that, Along the length of the crossbeam, one end of the protective cover is provided with a first through hole and a second through hole. The first through hole is provided corresponding to the handle and the drive rod, and the second through hole is provided corresponding to the adjusting shim.

7. The detection device according to claim 6, characterized in that, The adjusting shim is provided with hanging holes; The bracket is provided with a first protrusion, which is used for the hanging hole of the adjusting shim to pass through; and / or, The protective cover is provided with a second protrusion, which is used for the hanging hole of the adjusting pad to pass through.

8. The detection device according to any one of claims 1-3, characterized in that, The laser detection mechanism includes a light emitter and a light receiver. Along the length of the crossbeam, the light emitter and the light receiver are respectively disposed on both sides of the detection space. The light emitter is used to emit detection light into the detection space, and the light receiver is used to receive the detection light passing through the detection space.

9. The detection device according to claim 8, characterized in that, The laser detection mechanism also includes a rotating component, one end of which is rotatably connected to the crossbeam, and the other end of which extends to the detection space. The rotating component is disposed between the light emitter and the light receiver, and the detection light beam is used to detect whether the rotating component is rotating.

10. A printing device, characterized in that, Includes the detection device as described in any one of claims 1-9.

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