Magnetic head testing device

Abstract

The invention relates to the technical field of magnetic head production, in particular to a magnetic head testing device which comprises a rack, a supporting plate is arranged on the rack, a threaded pipe is fixed to the supporting plate, a lifting motor is further fixed to the rack, a screw is fixed to the output end of the lifting motor, the screw is in threaded connection with the threaded pipe, and the threaded pipe is connected with the lifting motor. A rotating motor is further fixed on the supporting plate, a testing disc is fixed at the output end of the rotating motor, magnetic strips are evenly fixed on the peripheral side of the upper end of the testing disc, shielding covers cover the magnetic strips, a table top is further fixed on the rack, a rotating disc is further arranged on the table top, a plurality of placing modules are further evenly arranged on the rotating disc, and the placing modules are arranged on the rotating disc. The placing module comprises a fixing block, a fixing groove is formed in the fixing block, a testing opening penetrating through the fixing block is further formed in the bottom of the fixing groove, and a plurality of air cylinders are further fixed to the portion, above the rotating disc, of the rack. The device can test a plurality of magnetic heads at a time, and the test efficiency of the magnetic heads is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of magnetic head manufacturing technology, and in particular to a magnetic head testing device. Background Technology

[0002] A banknote counter is a machine used to verify the authenticity of banknotes and count their quantity. Due to the massive scale of cash circulation and the heavy workload of cash handling at bank teller counters, banknote counters have become indispensable equipment, combining counting and counterfeit detection. With the development of printing, photocopying, and electronic scanning technologies, the level of counterfeit banknote production is becoming increasingly sophisticated, necessitating continuous improvement in the counterfeit detection performance of banknote counters. Based on the different paths the banknotes take, banknote counters are divided into horizontal and vertical types. Counterfeit detection methods typically include fluorescence recognition, magnetic analysis, and infrared penetration.

[0003] For example, patent application number CN202121767811.6 discloses a magnetic head sensitivity testing device, including a base plate, a screw and multiple support rods above the base plate, the screw being driven to rotate by a transverse motor, a slide plate above the base plate, a threaded tube fixed on the slide plate at a position corresponding to the screw, the screw extending into the threaded tube and threadedly connected to the threaded tube, support tubes fixed on the slide plate at positions corresponding to the support rods, the support rods extending into the support tubes and slidably connected to the support tubes, a lead screw I is provided on one side of the slide plate, the lead screw I is driven to rotate by a motor I, a slider threadedly connected to the lead screw I is provided on the lead screw I, and multiple magnetic strips are uniformly fixed on the slider. This type of device fixes the magnetic head to be tested on a bracket, which is then snapped onto a slide. When the first magnetic head on the bracket is aligned with the connector, the piston rod on the cylinder extends, and the connector moves closer to the pin on the magnetic head. The connector and the pin on the magnetic head assemble together, and motor I drives lead screw I to rotate. Since lead screw I is threadedly connected to the slide, the first magnetic strip on the slider is aligned with the magnetic head being tested. The transverse motor drives the screw to rotate. Since the screw is threadedly connected to the threaded pipe, when the screw rotates, the slider moves away from the magnetic head being tested. Eddy currents are formed in the magnetic field of the magnetic head by the magnetic stripe. The magnetic head senses the magnetic stripe by the sensing chip on the magnetic head, thus achieving the purpose of the magnetic head sensing the magnetic stripe and thus achieving the testing of the magnetic head. However, although this type of device can hold multiple magnetic heads at once, it actually requires one magnetic head to be tested before another magnetic head can be tested, which is inefficient.

[0004] This invention was proposed in response to the shortcomings of existing technologies. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a magnetic head testing device.

[0006] This invention can be achieved through the following technical solutions: This invention discloses a magnetic head testing device, comprising a frame, a support plate on the frame, a threaded tube fixed on the support plate, a lifting motor fixed on the frame, a screw fixed at the output end of the lifting motor, the screw being threadedly connected to the threaded tube, a rotary motor fixed on the support plate, a test disk fixed at the output end of the rotary motor, magnetic strips uniformly fixed on the upper periphery of the test disk, each magnetic strip covered with a shield, a platform fixed on the frame, a turntable on the platform, multiple placement modules uniformly arranged on the turntable, each placement module including a fixing block, a fixing groove on the fixing block, a test port penetrating the fixing block at the bottom of the fixing groove, multiple cylinders fixed on the frame above the turntable, a connecting plate above the turntable, the piston rod ends of each cylinder being fixed to the connecting plate, multiple test plates fixed on the connecting plate, and probes at the bottom of each test plate. Each magnetic head to be tested is placed in its fixed slot on a fixed block. The cylinder is activated, extending the piston rod and lowering the test plates. The probes on the test plates then descend, contacting the pins of the magnetic heads. A test motor drives the test disk to rotate, causing the magnetic strips to rotate with it. Eddy currents are generated within the magnetic head's magnetic field in the strips. An induction chip on the magnetic head senses these eddy currents, thus achieving the magnetic head's sensing function and enabling testing. A shielding cover is placed over the magnetic strips, with gradually increasing permeability. The high permeability of the shielding generates eddy currents that attenuate the electromagnetic field. Furthermore, the eddy currents themselves also generate a magnetic field, which affects the magnetic strips. The magnetic field is canceled out, thereby attenuating the magnetic field radiated by the magnetic strip. After the magnetic field is attenuated, the magnetic head can still sense the corresponding content of the magnetic strip when the magnetic strip moves, so the sensitivity of the magnetic head meets the requirements. The screw is driven to rotate by the lifting motor. When the screw rotates, the threaded tube moves in the screw direction, and the support plate drops a certain height. After the support plate drops, the distance between the magnetic head and the magnetic strip increases. The magnetic head senses the content of each magnetic head again, and the sensitivity of the magnetic head is tested again until the magnetic head can no longer sense the content of the magnetic strip. The sensitivity of the magnetic head can be confirmed. This device can realize the sensitivity test of the magnetic head and can test multiple magnetic heads at the same time, which greatly improves the testing efficiency of the magnetic head.

[0007] Preferably, the support plate is further fixed with multiple support rods, and the frame is provided with support tubes at positions corresponding to the support rods, and the support rods are slidably connected to the support tubes at the corresponding positions.

[0008] Preferably, the turntable is rotatably connected to the table surface, and a ring rack is fixed on the turntable. A rotary motor is fixed on the table surface, and a gear is fixed at the output end of the rotary motor, the gear meshing with the ring rack. When placing the magnetic head, the rotary motor drives the gear to rotate, the turntable rotates, and the magnetic head is transferred after each fixed block is rotated to the designated position, which can realize the placement and removal of the magnetic head in one position.

[0009] Preferably, the placement module includes a rotating shaft mounted on a turntable and rotatably connected to the turntable. A fixing plate is fixed to the top of each rotating shaft, and fixing blocks are provided on both sides of each fixing plate. The rotating shaft is driven to rotate by a feeding motor. After all the magnetic heads are placed within the fixing blocks, after the magnetic head on one side of the fixing plate is tested, the probe rises, and the feeding motor drives the rotating shaft to rotate 180 degrees. The magnetic head on the other side of the fixing block then reaches below the probe, allowing for testing of the magnetic head on that side. During testing, the tested magnetic head is removed and a new magnetic head is placed, enabling continuous testing of the magnetic heads and greatly improving testing efficiency.

[0010] Preferably, each of the rotating shafts is fixed with a pulley, the pulleys are connected by a synchronous belt, and the output end of the feeding motor is fixed to one of the rotating shafts.

[0011] Compared with existing technologies, the present invention has the following advantages: This device can perform sensitivity testing on magnetic heads and can test multiple magnetic heads at once, greatly improving the testing efficiency of magnetic heads. Attached Figure Description

[0012] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure of the present invention from another angle; In the diagram: 1. Frame; 2. Table; 3. Turntable; 4. Rack; 5. Gear; 6. Rotary motor; 7. Rotating shaft; 8. Fixing plate; 9. Fixing block; 10. Fixing groove; 11. Test port; 12. Test disc; 13. Probe; 14. Shielding cover; 15. Test motor; 16. Support plate; 17. Threaded tube; 18. Lifting motor; 19. Screw; 20. Support rod; 21. Support tube; 22. Pulley; 23. Synchronous belt; 24. Feeding motor; 25. Cylinder; 26. Connecting plate; 27. Test plate; Detailed Implementation

[0013] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings: Example

[0014] like Figures 1 to 2As shown, this embodiment discloses a magnetic head testing device, including a frame 1, a support plate 16 on the frame 1, a threaded tube 17 fixed on the support plate 16, a lifting motor 18 fixed on the frame 1, a screw 19 fixed at the output end of the lifting motor 18, the screw 19 being threadedly connected to the threaded tube 17, a rotary motor 6 fixed on the support plate 16, a test disk 12 fixed at the output end of the rotary motor 6, magnetic strips evenly fixed on the upper periphery of the test disk 12, each magnetic strip covered with a shielding cover 14, and a magnetic head testing device is also fixed on the frame 1. The table 2 is equipped with a turntable 3, and multiple placement modules are evenly arranged on the turntable 3. Each placement module includes a fixing block 9, a fixing groove 10, and a test port 11 penetrating the fixing block 9 at the bottom of the fixing groove 10. Multiple cylinders 25 are fixed on the frame 1 above the turntable 3. A connecting plate 26 is also provided above the turntable 3. The piston rod ends of the cylinders 25 are all fixed to the connecting plate 26. Multiple test plates 27 are also fixed on the connecting plate 26. Probes 13 are also provided at the bottom of the test plates 27. Each magnetic head to be tested is placed in the fixing slot 10 of each fixing block 9. The cylinder 25 is activated, the piston rod on the cylinder 25 extends, and each test plate 27 descends. Each probe 13 on the test plate 27 descends, and after the probe 13 contacts the pins of the magnetic head, the test motor 15 drives the test disk 12 to rotate. Each magnetic strip rotates with the test disk 12, and eddy currents are formed in the magnetic field of the magnetic head. The eddy currents are sensed by the induction chip on the magnetic head, thereby realizing the purpose of the magnetic head sensing the magnetic strips, thus realizing the testing of the magnetic head. Since the magnetic strips are covered with shielding covers 14, and the permeability of each shielding cover 14 gradually increases, the eddy current effect generated by the high permeability shielding cover 14 attenuates the electromagnetic field, and the eddy currents themselves also produce A magnetic field is generated to cancel out the magnetic field of the magnetic strip, thereby attenuating the magnetic field radiated by the magnetic strip. After the magnetic field is attenuated, the magnetic head can still sense the corresponding content of the magnetic strip when the magnetic strip moves, so the sensitivity of the magnetic head meets the requirements. The screw 19 is driven to rotate by the lifting motor 18. When the screw 19 rotates, the threaded tube 17 moves in the direction of the screw 19, and the support plate 16 drops a certain height. After the support plate 16 drops, the distance between the magnetic head and the magnetic strip increases, and the magnetic head senses the content of each magnetic head again, and the sensitivity of the magnetic head is tested again until the magnetic head can no longer sense the content of the magnetic strip. The sensitivity of the magnetic head can be confirmed. This device can realize the sensitivity test of the magnetic head and can test multiple magnetic heads at the same time, which greatly improves the testing efficiency of the magnetic head.

[0015] Among them, multiple support rods 20 are fixed on the support plate 16, and support tubes 21 are provided on the frame 1 at positions corresponding to the support rods 20. The support rods 20 and the support tubes 21 at corresponding positions are slidably connected. Example

[0016] This embodiment discloses a magnetic head testing device. Based on the structure and principle of Embodiment 1, the turntable 3 is rotatably connected to the platform 2. A ring rack 4 is also fixed on the turntable 3, and a rotary motor 6 is fixed on the platform 2. A gear 5 is fixed to the output end of the rotary motor 6, and the gear 5 meshes with the ring rack 4. When placing the magnetic head, the rotary motor 6 drives the gear 5 to rotate, and the turntable 3 rotates, rotating each fixed block 9 to the designated position before transferring the magnetic head. This allows for the placement and removal of the magnetic head in one location. Example

[0017] This embodiment discloses a magnetic head testing device. Based on the structure and principle of Embodiment 1, the placement module of this embodiment includes a rotating shaft 7 mounted on a turntable 3 and rotatably connected to the turntable 3. A fixing plate 8 is fixed to the top of each rotating shaft 7, and fixing blocks 9 are provided on both sides of the fixing plate 8. The rotating shaft 7 is driven to rotate by a feeding motor 24. After all magnetic heads are placed in the fixing blocks 9, after the magnetic head on one side of the fixing plate 8 is tested, the probe 13 rises, and the feeding motor 24 drives the rotating shaft 7 to rotate 180 degrees, allowing the magnetic head on the other side of the fixing block 9 to reach below the probe 13 for testing. During testing, the tested magnetic head is removed and placed again, enabling continuous testing of the magnetic heads and greatly improving the testing efficiency.

[0018] Each rotating shaft 7 is fixed with a pulley 22, which is connected by a synchronous belt 23. The output end of the feeding motor 24 is fixed to one of the rotating shafts 7.

[0019] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A magnetic head testing device, characterized in that, The device includes a frame with a support plate on it. A threaded tube is fixed to the support plate. A lifting motor is also fixed to the frame, and a screw is fixed to the output end of the lifting motor. The screw is threadedly connected to the threaded tube. A rotary motor is also fixed to the support plate, and a test plate is fixed to the output end of the rotary motor. Magnetic strips are evenly fixed to the upper periphery of the test plate, and each magnetic strip is covered with a shield. A platform is also fixed to the frame, and a turntable is set on the platform. Multiple placement modules are evenly arranged on the turntable. Each placement module includes a fixing block with a fixing groove. A test port penetrating the fixing block is set at the bottom of the fixing groove. Multiple cylinders are also fixed to the frame above the turntable. A connecting plate is also set above the turntable, and the piston rod ends of the cylinders are fixed to the connecting plate. Multiple test plates are also fixed to the connecting plate, and probes are set at the bottom of the test plates.

2. The magnetic head testing device according to claim 1, characterized in that: Multiple support rods are also fixed on the support plate, and support tubes are provided on the frame at positions corresponding to the support rods. The support rods are slidably connected to the support tubes at the corresponding positions.

3. The magnetic head testing device according to claim 1, characterized in that: The turntable is rotatably connected to the table, and a ring rack is fixed on the turntable. A rotary motor is fixed on the table, and a gear is fixed at the output end of the rotary motor. The gear meshes with the ring rack.

4. The magnetic head testing device according to claim 1, characterized in that: The placement module includes a rotating shaft mounted on a turntable and rotatably connected to the turntable. A fixing plate is fixed to the top of each rotating shaft, and fixing blocks are provided on both sides of each fixing plate. The rotating shaft is driven to rotate by a feeding motor.

5. The magnetic head testing device according to claim 4, characterized in that: Each of the rotating shafts is fixed with a pulley, which is connected by a synchronous belt. The output end of the feeding motor is fixed to one of the rotating shafts.

Images