Currency detector magnetic head convenient to replace

Abstract

The invention relates to the technical field of currency detectors, in particular to a currency detector magnetic head convenient to replace, which comprises a main body, a mounting opening is formed in the bottom of the main body, a magnetic head mechanism is slidably connected in the mounting opening, and the magnetic head mechanism comprises a mounting shell slidably connected with the inner wall of the mounting opening. A main magnetic head and auxiliary magnetic heads located on the two sides of the main magnetic head are arranged at the top of the mounting shell, auxiliary wheels located between the main magnetic head and the auxiliary magnetic heads are rotationally connected to the top of the mounting shell, a first mounting cavity is formed in the bottom of the mounting shell, a plurality of butt joints are slidably connected into the first mounting cavity, and a first spring is arranged between each set of butt joints. One end of the butt joint penetrates through the mounting shell and extends into the clamping opening of the mounting opening, and an inclined groove is formed in the bottom of the butt joint. The mounting shell is automatically fixed through cooperation of the butt joint, the first spring and the bayonet, the buckle block is pressed to drive the movable plate during replacement, the butt joint is contracted to relieve clamping, tools are not needed, and the maintenance time is shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of banknote detectors, and in particular to a magnetic head for a banknote detector that is easy to replace. Background Art

[0002] In the financial sector, banknote detectors are essential equipment for verifying currency authenticity, and their performance is directly related to the security and efficiency of currency circulation. The magnetic head, a core component of a banknote detector, is primarily used to read the magnetic signature of banknotes, playing a crucial role in verifying their authenticity.

[0003] However, a significant issue with the magnetic heads commonly found in currency detectors currently on the market is the cumbersome nature of replacement. Traditional magnetic heads are typically attached to the detector body using a complex fixed structure. When the heads become worn, aged, or damaged due to long-term use and require replacement, operators often require specialized tools, consuming significant time and effort to remove and install the heads. This not only increases maintenance costs but can also cause the detector to malfunction during maintenance, impacting currency verification efficiency and causing inconvenience for both financial institutions and users.

[0004] In addition, the inconvenience of replacing traditional magnetic heads may cause some users to delay replacing damaged magnetic heads because they find it troublesome to replace them. This will reduce the accuracy of the banknote detector, increase the risk of misjudgment, leave hidden dangers for the circulation of counterfeit currency, and seriously threaten the safety of currency circulation. Summary of the Invention

[0005] The present invention provides a magnetic head for a currency detector that is easy to replace, so as to solve the problem of troublesome replacement of the magnetic head for a currency detector in the prior art mentioned in the above background art.

[0006] In order to solve the above technical problems, the present invention adopts a technical solution: providing a magnetic head for a currency detector that is easy to replace, comprising a main body, a mounting opening being formed at the bottom of the main body, and a magnetic head mechanism being slidably connected to the mounting opening;

[0007] The magnetic head mechanism includes a mounting shell slidably connected to the inner wall of the mounting port, a main magnetic head and auxiliary magnetic heads located on both sides of the main magnetic head are provided on the top of the mounting shell, and an auxiliary wheel located between the main magnetic head and the auxiliary magnetic head is rotatably connected to the top of the mounting shell;

[0008] The bottom of the mounting shell is provided with a mounting cavity 1, in which a plurality of docking joints are slidably connected, and a spring 1 is provided between each set of docking joints. One end of the docking joint passes through the mounting shell and extends into the bayonet of the mounting port, and an oblique groove is provided at the bottom of the docking joint;

[0009] A movable plate is slidably connected to the mounting cavity below the docking head. A docking block slidably connected to the inclined groove is provided on the top of the movable plate. A buckle block penetrating the mounting shell is provided on the bottom of the movable plate.

[0010] The present invention is further configured such that a drive cavity is opened on one side of the main body, a transmission mechanism is provided inside the main body at the top of the magnetic head mechanism, the transmission mechanism includes a transmission rod rotatably connected to the inner wall of the main body, one end of the transmission rod extends into the drive cavity and is fixedly connected to a transmission disk, and the transmission rod is fixedly connected to a plurality of transmission wheels on the circumferential outer wall inside the main body.

[0011] The present invention is further configured such that the outer wall of the transmission wheel is provided with an installation groove 2, a cleaning block is slidably connected to the inner wall of the installation groove 2, a limiting groove is provided on the inner wall of the installation groove 2, and a positioning block is provided on the outer wall of the cleaning block that is slidably connected to the limiting groove; an inclined surface is provided on the bottom of the cleaning block near the transmission rod.

[0012] The present invention is further configured such that an installation groove 1 is provided on the outer wall of the transmission rod at a position corresponding to the cleaning block, a movable rod is slidably connected in the installation groove 1, an extrusion block is provided on the surface of the movable rod and is slidably connected to the bottom inclined surface of the cleaning block, a limiting groove is provided on the top of the extrusion block, and a limiting block is provided at the bottom of the inclined surface and is slidably connected to the limiting groove.

[0013] The present invention is further configured such that a sliding rod is fixedly connected to a position near the transmission disk in the driving cavity, a slide plate is sleeved on the outer wall of the sliding rod, one end of the movable rod passes through the transmission rod and the transmission disk and extends into the driving cavity, and a docking hole is opened on the outer wall of the slide plate for rotationally connecting to the end of the movable rod.

[0014] The present invention is further configured such that a telescopic rod is provided on a side of the slide plate close to the transmission disc, and one end of the telescopic rod is connected to the inner wall of the driving cavity.

[0015] The present invention is further configured such that a pin header is further provided on the top of the installation shell, and the pin header is located at a position on the top of the installation shell close to the surrounding outer walls.

[0016] The advantageous effects of the magnetic head of a currency detector that is easy to replace according to the present invention are as follows:

[0017] 1. The mounting shell engages with the bayonet in the mounting port of the main body through the docking joint. The spring's elastic support automatically snaps into place to secure the mounting shell. To replace the mounting shell, simply press down on the buckle block to slide the movable plate. The docking block on top of the movable plate pushes the docking joint inward through the inclined slot, releasing the engagement. The mounting shell can then be removed from the mounting port. No specialized tools are required, significantly reducing maintenance time.

[0018] 2. The integrated design of transmission and cleaning functions. The drive cavity on one side of the main body is linked to a transmission mechanism via a transmission wheel and a transmission rod. When external power drives the transmission wheel to rotate, the transmission rod synchronously drives the internal transmission wheel to rotate. The cleaning block on the outer wall of the transmission wheel slides in conjunction with the positioning block and the limit slot. During rotation, it moves radially along the second mounting slot. Its bottom inclined surface slides in contact with the extrusion block of the movable rod. The guidance of the limit block and the limit slot allows the cleaning block to extend and adhere to the surface of the magnetic head, achieving automatic cleaning of the main and auxiliary magnetic heads, preventing dust accumulation from affecting identification accuracy.

[0019] 3. Optimized power transmission stability: The slide rod and the slide plate in the drive chamber form a sliding guide structure. The end of the movable rod is rotatably connected to the slide plate through a docking hole. When the transmission wheel rotates, the movable rod rotates synchronously with the transmission rod, pushing the slide plate to slide back and forth along the slide rod. The elastic support of the telescopic rod ensures that the movable rod and the cleaning block maintain stable contact at all times, preventing shaking during transmission and improving the reliability of the cleaning action.

[0020] 4. The overall structure is designed in a modular manner, integrating the magnetic head mechanism, transmission mechanism, and cleaning mechanism into the main body. This not only enables the rapid replacement of the magnetic head, but also reduces the frequency of manual maintenance through the automatic cleaning function of the transmission system, reduces the risk of misjudgment due to component wear or dust accumulation, ensures the long-term stable operation of the banknote detector, and improves the security and efficiency of currency circulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, a detailed description is given below with reference to the accompanying drawings.

[0022] It should be noted that, unless otherwise defined, the technical or scientific terms used in the present invention should have the usual meanings understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0023] Figure 1 This is a three-dimensional structural diagram of a magnetic head of a currency detector that is easy to replace according to the present invention;

[0024] Figure 2This is a bottom view of a magnetic head of a currency detector that is easy to replace according to the present invention;

[0025] Figure 3 This is a diagram of the internal structure of a magnetic head of a currency detector that is easy to replace according to the present invention;

[0026] Figure 4 This is an isolated diagram of a magnetic head of a currency detector that is easy to replace according to the present invention;

[0027] Figure 5 This is an enlarged view of the magnetic head mechanism of a currency detector that is easy to replace;

[0028] Figure 6 This is a diagram showing the separation of a magnetic head mechanism of a currency detector that is easy to replace;

[0029] Figure 7 This is an enlarged view of the transmission mechanism of the magnetic head of a currency detector that is easy to replace according to the present invention;

[0030] Figure 8 This is a partial exploded view of the transmission mechanism of the magnetic head of a currency detector that is easy to replace according to the present invention.

[0031] The following are marked in the figure:

[0032] 1. Main body; 11. Mounting port; 12. Magnetic head mechanism; 121. Mounting shell; 122. Pin header; 123. Main magnetic head; 124. Auxiliary wheel; 125. Secondary magnetic head; 126. Mounting cavity 1; 127. Docking joint; 1271. Inclined groove; 1272. Spring 1; 128. Movable plate; 1281. Docking block; 1282. Buckle block;

[0033] 13. Drive chamber; 14. Transmission mechanism; 141. Transmission rod; 1411. Transmission plate; 1412. Mounting slot 1; 142. Movable rod; 1421. Extrusion block; 1422. Limiting slide; 143. Transmission wheel; 1431. Mounting slot 2; 1432. Limiting slot; 144. Cleaning block; 1441. Limiting block; 1442. Positioning block; 145. Slide rod; 146. Slide plate; 1461. Docking hole; 147. Telescopic rod; 15. Transmission assembly. DETAILED DESCRIPTION

[0034] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other; the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left" and "right" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the positions or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limitations of the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. In addition, unless otherwise expressly specified and limited, the term "connection" should be understood in a broad sense, for example, "connection" can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or a transmission connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two elements or the interaction relationship between two elements.

[0036] See also Figures 1-8 A magnetic head for a currency detector that is easy to replace includes a main body 1, a mounting opening 11 is provided at the bottom of the main body 1, and a magnetic head mechanism 12 is slidably connected to the mounting opening 11;

[0037] The magnetic head mechanism 12 includes a mounting shell 121 slidably connected to the inner wall of the mounting opening 11. A main magnetic head 123 and auxiliary magnetic heads 125 located on both sides of the main magnetic head 123 are provided on the top of the mounting shell 121. An auxiliary wheel 124 is rotatably connected to the top of the mounting shell 121 and is located between the main magnetic head 123 and the auxiliary magnetic head 125.

[0038] The bottom of the mounting shell 121 defines a mounting cavity 126 , within which a plurality of docking joints 127 are slidably connected. A spring 1272 is provided between each set of docking joints 127 . One end of the docking joint 127 passes through the mounting shell 121 and extends into the bayonet of the mounting port 11 . An inclined slot 1271 is defined at the bottom of the docking joint 127 .

[0039] A movable plate 128 is slidably connected to the bottom of the docking joint 127 in the mounting cavity 126. A docking block 1281 slidably connected to the inclined groove 1271 is provided on the top of the movable plate 128. A buckle block 1282 that passes through the mounting shell 121 is provided at the bottom of the movable plate 128. A pin header 122 is also provided on the top of the mounting shell 121. The pin header 122 is located at a position on the top of the mounting shell 121 close to the surrounding outer walls.

[0040] By adopting the above technical solution, a mounting cavity 126 is defined at the bottom of the mounting shell 121, within which a plurality of docking joints 127 are slidably connected. One end of the docking joint 127 extends through the mounting shell 121 and into the bayonet of the mounting port 11. Through the bayonet, it is fixedly connected to the main body 1, ensuring the stability of the magnetic head mechanism 12. A spring 1272 is provided between each set of docking joints 127. The spring 1272 provides a reset force for the docking joints 127, ensuring that the docking joints 127 automatically reset after being subjected to external forces. When the movable plate 128 moves, the docking block 1281 compresses the chute 1271, thereby driving the docking joints 127 to move, enabling rapid disassembly of the magnetic head mechanism 12.

[0041] A driving cavity 13 is provided on one side of the main body 1. A transmission mechanism 14 is provided on the top of the magnetic head mechanism 12 inside the main body 1. The transmission mechanism 14 includes a transmission rod 141 rotatably connected to the inner wall of the main body 1. One end of the transmission rod 141 extends into the driving cavity 13 and is fixedly connected to a transmission disk 1411. The transmission rod 141 is located on the outer circumferential wall inside the main body 1 and is fixedly connected to a plurality of transmission wheels 143. The outer wall of the transmission wheel 143 is provided with a second mounting groove 1431. A cleaning block 144 is slidably connected to the second mounting groove 1431. A limiting groove 1432 is provided on the inner wall of the second mounting groove 1431. The outer wall of the sorting block 144 is provided with a positioning block 1442 which is slidably connected to the limit groove 1432; the bottom of the cleaning block 144 is provided with an inclined surface near the transmission rod 141, and the outer wall of the transmission rod 141 is provided with a mounting groove 1412 at a position corresponding to the cleaning block 144, and the movable rod 142 is slidably connected in the mounting groove 1412, and the surface of the movable rod 142 is provided with an extrusion block 1421 which is slidably connected to the inclined surface at the bottom of the cleaning block 144, and a limiting slide groove 1422 is provided on the top of the extrusion block 1421, and a limiting block 1441 which is slidably connected to the limiting slide groove 1422 is provided at the bottom of the inclined surface.

[0042] By adopting the above technical solution, a sloped surface is provided at the bottom of cleaning block 144 near transmission rod 141. A mounting groove 1412 is provided on the outer wall of transmission rod 141 at a position corresponding to cleaning block 144. A movable rod 142 is slidably connected within mounting groove 1412. An extrusion block 1421 on movable rod 142 is slidably connected to the sloped surface of cleaning block 144, squeezing the sloped surface to move cleaning block 144 upward or downward. A limiting groove 1422 is provided at the top of extrusion block 1421, and a limiting block 1441 is provided at the bottom of the sloped surface of cleaning block 144, which is slidably connected to limiting groove 1422. The cooperation between limiting block 1441 and limiting groove 1422 ensures that cleaning block 144 will not separate from extrusion block 1421 during movement.

[0043] A slide rod 145 is fixedly connected to a position near the transmission disk 1411 in the driving chamber 13, and a slide plate 146 is provided on the outer wall of the slide rod 145. One end of the movable rod 142 passes through the transmission rod 141 and the transmission disk 1411 and extends into the driving chamber 13. A docking hole 1461 is provided on the outer wall of the slide plate 146 for rotationally connecting to the end of the movable rod 142. A telescopic rod 147 is provided on the side of the slide plate 146 close to the transmission disk 1411, and one end of the telescopic rod 147 is connected to the inner wall of the driving chamber 13.

[0044] By adopting the above technical solution, the outer wall of the slide 146 is provided with a docking hole 1461 that is rotatably connected to the end of the movable rod 142. The movable rod 142 is rotatably connected to the slide 146 through the docking hole 1461. This design allows the movable rod 142 to maintain a certain degree of flexibility when the slide 146 moves, while at the same time transmitting power or control signals through the slide 146. The telescopic rod 147 is used to push or pull the slide 146 to slide on the slide rod 145, thereby achieving control of the movable rod 142 and other components of the transmission mechanism 14.

[0045] The working principle and usage process of the embodiment of the present invention are as follows:

[0046] A transmission assembly 15 is disposed within the drive chamber 13 and is connected to the transmission disc 1411 via a transmission belt, thereby driving the transmission mechanism 14 to rotate. In a normal state, the output end of the telescopic rod 147 pushes the slide 146, so that the slide 146 is located at the end of the slide rod 145 away from the transmission disc 1411. Simultaneously, the slide 146 pulls the movable rod 142, so that the extrusion block 1421 no longer squeezes the inclined surface of the cleaning block 144. Therefore, the cleaning block 144 is now located at the bottom of the second mounting slot 1431. This ensures that the cleaning block 144 does not affect the normal operation of the banknote detector. The docking joint 127 within the magnetic head mechanism 12 is pushed by the first spring 1272, so that one end of the docking joint 127 is always inserted into the latch, thereby ensuring that the magnetic head mechanism 12 is securely mounted to the mounting port 11.

[0047] When the magnetic head mechanism 12 needs to be disassembled, first turn off the power to the machine, then detent 1282 is triggered, and the movable plate 128 is moved inside the mounting cavity 126 by detent 128. When the movable plate 128 moves, the docking block 1281 is driven to move, and the movement of the docking block 1281 squeezes the inclined groove 1271 of the docking joint 127, and the docking joint 127 is moved by squeezing the inclined groove 1271. The movement of the docking joint 127 causes the outer end to disengage from the bayonet, so that the magnetic head mechanism 12 can be directly pulled out of the mounting port 11. When installing the magnetic head mechanism 12, detent 1282 is triggered again to retract the end of the docking joint 127, and the magnetic head mechanism 12 is inserted into the mounting port 11 in the correct direction, so that the pin header 122 docks with the electrode, and then the detent 1282 is released to complete the installation.

[0048] After the magnetic head mechanism 12 has been used for a certain period of time, dirt will be present on its surface. The dirt will affect the detection of the magnetic head, thereby affecting the function of the banknote detector to detect banknotes. Therefore, the magnetic head needs to be cleaned after being used for a certain period of time. When the banknote detector stops detecting banknotes and needs to be cleaned, the slide 146 is first pulled by the output end of the telescopic rod 147, and the movable rod 142 is moved by pulling the slide 146. When the telescopic rod 147 pulls the slide 146 closer to the transmission disk 1411, the movable rod 142 will drive the extrusion block 1421 to squeeze the inclined surface of the cleaning block 144, and the cleaning block 144 is moved up and leaked out from between the transmission wheels 143 by squeezing the inclined surface. The limit block 1441 cooperates with the limit slide groove 1422 to prevent the inclined surface from detaching from the extrusion block 1421. When the cleaning block 144 moves in the second mounting groove 1431, the positioning block 1442 cooperates with the limit groove 1432 to prevent the cleaning block 144 from deviating.

[0049] After the cleaning block 144 is extended, the transmission disk 1411 is driven to rotate through the transmission assembly 15. The rotation of the transmission disk 1411 will drive the cleaning block 144 to rotate through the transmission rod 141 and the transmission wheel 143. By driving the cleaning block 144 to rotate, the surface of the magnetic head is cleaned. When the cleaning is completed, the telescopic rod 147 pushes the slide 146, so that the slide 146 pulls the extrusion block 1421 to reset through the movable rod 142.

[0050] In summary, compared with the prior art, the embodiments of the present invention have the following advantages:

[0051] Advantage 1: Convenient head replacement design. The sliding connection between mounting port 11 and head mechanism 12, as well as the clever coordination between connector 127 and movable plate 128, enables quick head removal and installation. Operators simply need to detent block 1282 to easily replace the head, without the need for specialized tools, significantly saving time and effort.

[0052] Advantage 2: Stable magnetic head fixing mechanism. Under the push of spring 1272, the joint 127 can be firmly inserted into the bayonet, ensuring the stable connection between the magnetic head mechanism 12 and the installation port 11, thereby improving the operational reliability and safety of the banknote detector.

[0053] Advantage 3: Efficient head cleaning function. The design of the transmission mechanism 14 enables the cleaning block 144 to extend and rotate when needed to clean the head surface. Through the push and pull of the telescopic rod 147 and the cooperation of the movable rod 142 and the extrusion block 1421, the cleaning block 144 is automatically extended and reset, improving cleaning efficiency and convenience.

[0054] Advantage 4: The intelligent positioning and anti-drift mechanism of the cleaning block 144, the cooperation between the limiting slide groove 1422 and the limiting block 1441, and the cooperation between the positioning block 1442 and the limiting groove 1432, ensure that the cleaning block 144 will not deviate or fall off during the extension and rotation process, thereby improving the stability and durability of the cleaning block 144.

[0055] Advantage 5: Integrated drive and transmission design. The connection between the transmission assembly 15 and the transmission plate 1411, as well as the overall design of the transmission mechanism 14, makes the drive and transmission components of the currency detector more compact and efficient. This integrated design not only improves the operating efficiency of the currency detector, but also reduces maintenance costs.

[0056] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A magnetic head for a currency detector that is easy to replace, comprising a main body (1), characterized in that: The bottom of the main body (1) is provided with a mounting opening (11), and a magnetic head mechanism (12) is slidably connected inside the mounting opening (11); The magnetic head mechanism (12) comprises a mounting shell (121) slidably connected to the inner wall of the mounting port (11); a main magnetic head (123) and auxiliary magnetic heads (125) located on both sides of the main magnetic head (123) are provided on the top of the mounting shell (121); and an auxiliary wheel (124) located between the main magnetic head (123) and the auxiliary magnetic head (125) is rotatably connected to the top of the mounting shell (121); The bottom of the mounting shell (121) is provided with a mounting cavity (126), a plurality of docking joints (127) are slidably connected in the mounting cavity (126), a spring (1272) is provided between each group of docking joints (127), one end of the docking joint (127) passes through the mounting shell (121) and extends into the bayonet of the mounting port (11), and an inclined groove (1271) is provided at the bottom of the docking joint (127); A movable plate (128) is slidably connected to the mounting cavity (126) below the docking joint (127), a docking block (1281) slidably connected to the inclined groove (1271) is provided on the top of the movable plate (128), and a buckle block (1282) penetrating the mounting shell (121) is provided on the bottom of the movable plate (128).

2. The easily replaceable magnetic head for a currency detector according to claim 1, characterized in that: A driving cavity (13) is provided on one side of the main body (1), and a transmission mechanism (14) is provided on the top of the magnetic head mechanism (12) inside the main body (1). The transmission mechanism (14) includes a transmission rod (141) rotatably connected to the inner wall of the main body (1), one end of the transmission rod (141) extends into the driving cavity (13) and is fixedly connected to a transmission disk (1411), and a plurality of transmission wheels (143) are fixedly connected to the circumferential outer wall of the transmission rod (141) located inside the main body (1).

3. The easily replaceable magnetic head for a currency detector according to claim 2, characterized in that: The outer wall of the transmission wheel (143) is provided with a second installation groove (1431), and a cleaning block (144) is slidably connected in the second installation groove (1431); the inner wall of the second installation groove (1431) is provided with a limiting groove (1432), and the outer wall of the cleaning block (144) is provided with a positioning block (1442) slidably connected to the limiting groove (1432); the bottom of the cleaning block (144) is provided with an inclined surface near the transmission rod (141).

4. The easily replaceable magnetic head for a currency detector according to claim 3, characterized in that: The outer wall of the transmission rod (141) is provided with an installation groove (1412) at a position corresponding to the cleaning block (144), and a movable rod (142) is slidably connected in the installation groove (1412). The surface of the movable rod (142) is provided with an extrusion block (1421) that is slidably connected to the bottom inclined surface of the cleaning block (144), and a limiting slide groove (1422) is provided on the top of the extrusion block (1421), and a limiting block (1441) is slidably connected to the limiting slide groove (1422) at the bottom of the inclined surface.

5. The easily replaceable magnetic head for a currency detector according to claim 2, characterized in that: A sliding rod (145) is fixedly connected to a position near the transmission disk (1411) in the driving cavity (13); a slide plate (146) is sleeved on the outer wall of the sliding rod (145); one end of the movable rod (142) passes through the transmission rod (141) and the transmission disk (1411) and extends into the driving cavity (13); and a docking hole (1461) is opened on the outer wall of the slide plate (146) for rotationally connecting with the end of the movable rod (142).

6. The easily replaceable magnetic head for a currency detector according to claim 5, characterized in that: A telescopic rod (147) is provided on one side of the slide plate (146) close to the transmission disc (1411), and one end of the telescopic rod (147) is connected to the inner wall of the driving cavity (13).

7. The easily replaceable magnetic head for a currency detector according to claim 1, characterized in that: A pin header (122) is also provided on the top of the installation shell (121), and the pin header (122) is located at a position on the top of the installation shell (121) close to the surrounding outer walls.

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