Coded disc module and card reader

Abstract

The utility model discloses a coded disc module and a card reader, and relates to the technical field of precision measuring equipment, the coded disc module comprises a housing, a coded disc and a locking mechanism, the housing is provided with an inner cavity; the code disc is rotationally mounted in the inner cavity; the locking mechanism comprises a follower and a locking piece, the follower is fixed at one end of the code disc, the follower is provided with a plurality of grooves, and the plurality of grooves are arranged around the follower; the locking piece is arranged on the cavity wall of the inner cavity and used for being clamped into one of the grooves when the code disc stops rotating so as to limit the position of the code disc. The technical scheme provided by the utility model has the technical effect that the detection accuracy of the card reader is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of precision measurement equipment, and particularly relates to a code disk module and a card reader. Background Art

[0002] An encoder is a device that converts mechanical position into an electrical signal and is commonly used to detect rotational angle, moving distance, speed, etc. The code disk is a key component in the encoder, which converts mechanical position into pulse or digital signals output through photoelectric or electromagnetic principles. Encoders can be divided into three types: incremental, absolute, and hybrid. The incremental encoder outputs pulse signals to represent position changes and requires zeroing to determine the reference position. The absolute encoder can directly output a unique code representing the current absolute position and does not require zeroing. The hybrid encoder combines the characteristics of incremental and absolute encoders to provide higher-precision measurement.

[0003] In a card reader, the role of the code disk is to convert specific information of the card (such as the track information of a magnetic stripe card or the chip information of an IC card) into an electrical signal so that the reader can identify and process this information. This usually involves non-contact communication between the card and the reader, such as RFID technology, where the antenna between the chip built into the card and the reader exchanges data through radio waves.

[0004] In the prior art, in order to achieve precise position detection, a magnetic detection type code disk is widely used. The traditional method obtains position information by the magnetic head sensing the magnetic marks on the code disk. However, this traditional method has certain deficiencies, mainly reflected in the relatively low detection accuracy. Summary of the Utility Model

[0005] The main object of the utility model is to propose a code disk module and a card reader, aiming to improve the detection accuracy of the card reader.

[0006] To achieve the above object, a code disk module proposed by the utility model includes:

[0007] A housing provided with an inner cavity;

[0008] A code disk rotatably installed in the inner cavity; and

[0009] A locking mechanism including a follower and a locking member. The follower is fixed to one end of the code disk, and the follower is provided with a plurality of grooves arranged around the follower; the locking member is arranged on the inner cavity wall and is used to snap into one of the grooves when the code disk stops rotating to limit the position of the code disk.

[0010] In one embodiment, the housing is further provided with a mounting hole communicating with the inner cavity;

[0011] The code disc module further includes a connecting shaft passing through the mounting hole. One end of the connecting shaft extends into the inner cavity and is rotatably connected to the inner cavity; the other end of the connecting shaft is used to connect to the driving wheel of the card reader; the follower is sleeved on the connecting shaft.

[0012] In one embodiment, the follower includes:

[0013] A limiting block, a plurality of the grooves are located on the circumferential outer wall of the limiting block; and

[0014] A mounting flange, the mounting flange is connected to one end of the limiting block and passes through the code disc; the connecting shaft sequentially passes through the mounting flange and the limiting block and is rotatably connected to the inner cavity.

[0015] In one embodiment, a limiting groove is provided on the side of the follower facing away from the mounting hole, and the connecting shaft passes through the limiting groove;

[0016] The locking mechanism further includes a first spring installed in the limiting groove. The first spring is sleeved on the connecting shaft, and both ends of the first spring are elastically abutted against the inner cavity wall and the groove wall of the limiting groove respectively.

[0017] In one embodiment, the locking mechanism further includes a locking spring piece sleeved on the connecting shaft, and the locking spring piece is elastically abutted against the side of the code disc facing the mounting hole.

[0018] In one embodiment, the locking mechanism further includes an elastic gasket installed between the locking spring piece and the code disc.

[0019] In one embodiment, the locking member includes:

[0020] A second spring, one end of the second spring is connected to the inner cavity wall; and

[0021] A ball locking tooth, the ball locking tooth is connected to the other end of the second spring, and the ball locking tooth is used to be clamped with one of the grooves.

[0022] In one embodiment, the shape of each groove is adapted to the shape of the ball locking tooth.

[0023] In one embodiment, the code disc module further includes a photoelectric sensor installed on the outer wall of the housing. The housing is provided with a detection hole communicating with the inner cavity, and the photoelectric sensor is correspondingly arranged with the detection hole for detecting the position of the code disc.

[0024] The present utility model also provides a card reader, which comprises:

[0025] A housing;

[0026] A microprocessor disposed within the housing;

[0027] An adjustment circuit disposed within the microprocessor and electrically connected to the microprocessor for adjusting the signal returned by the card and transmitting it to the microprocessor; and

[0028] The code disk module as described above, which is installed within the housing and is spaced apart from the microprocessor.

[0029] The code disk module of the technical solution of the present utility model includes a housing, a code disk and a locking mechanism. The housing is provided with an inner cavity; the code disk is rotatably installed within the inner cavity; the locking mechanism includes a follower and a locking member. The follower is fixed to one end of the code disk, and the follower is provided with a plurality of grooves which are arranged around the follower; the locking member is disposed on the inner cavity wall for engaging with one of the grooves when the code disk stops rotating to define the position of the code disk; thus, when the code disk stops rotating, the locking member can engage with one of the grooves on the follower, thereby locking the positions of the follower and the code disk. This design not only simplifies the position adjustment and fixing process of the code disk, but also improves the detection accuracy of the card reader. Description of the Drawings

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0031] Figure 1 It is a schematic structural diagram of an embodiment of the code disk module provided by the present utility model;

[0032] Figure 2 It is a top view of the code disk module provided by the present utility model;

[0033] Figure 3 For Figure 2 The cross-sectional view taken along line A-A in

[0034] Explanation of the Reference Numerals in the Drawings:

[0035] 10. Housing; 10a, Inner cavity; 20, Code disk; 30, Locking mechanism; 31, Follow-up member; 311, Limit block; 312, Mounting flange; 31a, Groove; 31b, Limit groove; 32, Locking member; 321, Second spring; 322, Ball catch teeth; 33, First spring; 34, Locking spring piece; 35, Elastic gasket; 40, Connecting shaft; 50, Photoelectric sensor.

[0036] The realization, functional features and advantages of the purpose of the present utility model will be further described in conjunction with the embodiments with reference to the accompanying drawings. Detailed implementation manners

[0037] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts fall within the protection scope of the present utility model.

[0038] It should be noted that if there are directional indications (such as up, down, left, right, front, back,...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0039] In addition, if there are descriptions such as "first" and "second" involved in the embodiments of the present utility model, the descriptions of "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between the embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0040] The present utility model proposes a code disk module.

[0041] Please refer to Figures 1 to 3, in an embodiment of the present utility model, the code disk 20 module includes a housing 10, a code disk 20 and a locking mechanism 30. The housing 10 is provided with an inner cavity 10a; the code disk 20 is rotatably installed in the inner cavity 10a; the locking mechanism 30 includes a follower 31 and a locking member 32. The follower 31 is fixed to one end of the code disk 20. The follower 31 is provided with a plurality of grooves 31a, and the plurality of grooves 31a are arranged around the follower 31; the locking member 32 is arranged on the wall of the inner cavity 10a and is used to snap into one of the grooves 31a when the code disk 20 stops rotating, so as to limit the position of the code disk 20.

[0042] The housing 10 is made of a high-strength wear-resistant material, is cylindrical in shape, and is provided with an inner cavity 10a. The space of the inner cavity 10a is sufficient to accommodate the code disk 20 and its related components, and ensure that the code disk 20 can rotate freely. The code disk 20 is rotatably installed in the inner cavity 10a. The diameter of the code disk 20 matches the diameter of the inner cavity 10a of the housing 10 to ensure that the code disk 20 does not rub against the wall surface of the inner cavity 10a when rotating. The follower 31 is fixed to one end of the code disk 20. The follower 31 is designed to be cylindrical and is provided with a plurality of grooves 31a. The plurality of grooves 31a are evenly arranged around the follower 31, and the depth and width of each groove 31a are sufficient to accommodate the locking member 32. The locking member 32 is arranged on the wall of the inner cavity 10a, and its shape and size match the grooves 31a on the follower 31. The material of the locking member 32 has sufficient hardness and wear resistance to ensure that it can firmly snap into one of the grooves 31a when the code disk 20 stops rotating.

[0043] When the code disk 20 rotates, the follower 31 rotates accordingly. Since the grooves 31a on the follower 31 are evenly distributed, the code disk 20 can stop at any position. When the code disk 20 stops rotating, the locking member 32 automatically snaps into one of the grooves 31a on the follower 31, thereby limiting the position of the code disk 20 and preventing it from rotating arbitrarily. The setting of the inner cavity 10a of the housing 10 provides a stable and enclosed environment for the rotation of the code disk 20, greatly reducing the influence of external factors on the rotation of the code disk 20 and improving the stability and reliability of the rotation of the code disk 20.

[0044] In the present utility model, by arranging the locking mechanism 30 in the inner cavity 10a, the locking mechanism 30 includes a follower 31 and a locking member 32. The follower 31 is fixed to one end of the code disk 20 and is provided with a plurality of grooves 31a, and these grooves 31a are arranged around the follower 31; thus, when the code disk 20 stops rotating, the locking member 32 can snap into one of the grooves 31a on the follower 31, thereby locking the positions of the follower 31 and the code disk 20. This design not only simplifies the position adjustment and fixing process of the code disk 20, but also improves the detection accuracy of the card reader.

[0045] In an embodiment, please refer toFigures 1 to 3 The housing 10 is further provided with a mounting hole communicating with the inner cavity 10a; the code disk 20 module further includes a connecting shaft 40 passing through the mounting hole, one end of the connecting shaft 40 extends into the inner cavity 10a and is rotatably connected to the inner cavity 10a; the other end of the connecting shaft 40 is used to connect with the driving wheel of the card reader; the follower 31 is sleeved on the connecting shaft 40.

[0046] The code disk 20 module includes a connecting shaft 40 passing through the mounting hole, one end of the connecting shaft 40 extends into the inner cavity 10a and is rotatably connected to the rotating part in the inner cavity 10a. The other end of the connecting shaft 40 extends out of the inner cavity 10a and is provided with a structure connected to the driving wheel of the card reader. The follower 31 is sleeved on the connecting shaft 40. The follower 31 is preferably made of wear-resistant material to meet the requirements of long-term use. The fitting clearance between the follower 31 and the connecting shaft 40 is appropriate to ensure that the follower 31 can move smoothly during the rotation of the connecting shaft 40.

[0047] During use, the driving wheel of the card reader drives the connecting shaft 40 to rotate. The connecting shaft 40 is connected to the rotating part in the inner cavity 10a through a rotating disk, so as to drive other components in the inner cavity 10a to move. The follower 31 moves along with the rotation of the connecting shaft 40 to achieve coordinated work with the card reader.

[0048] By providing a mounting hole communicating with the inner cavity 10a, the connection between the code disk 20 module and the inner cavity 10a is made more compact and stable. This design not only improves the compactness of the overall structure, but also facilitates the installation and maintenance of the code disk 20 module. Compared with the prior art, this structural optimization significantly reduces the installation difficulty and improves the production efficiency. Secondly, the connecting shaft 40 of the code disk 20 module passing through the mounting hole, one end of which extends into the inner cavity 10a and is rotatably connected to the inner cavity 10a, and the other end is used to connect with the driving wheel of the card reader. This design effectively realizes the precise transmission between the code disk 20 module and the card reader, ensuring the stability and reliability of the code disk 20 module during operation.

[0049] In one embodiment, please refer to Figures 1 to 3 , the follower 31 includes a limiting block 311 and a mounting flange 312, and a plurality of grooves 31a are located on the circumferential outer wall of the limiting block 311; the mounting flange 312 is connected to one end of the limiting block 311 and passes through the code disk 20; the connecting shaft 40 passes through the mounting flange 312 and the limiting block 311 in sequence and is rotatably connected to the inner cavity 10a.

[0050] By integrating the structural design of the limit block 311 and the mounting flange 312, the stability of the follower 31 is effectively improved. The design of the multiple grooves 31a on the circumferential outer wall of the limit block 311 not only enhances the structural strength of the limit block 311 but also provides better guiding, making the entire follower 31 move more smoothly during the movement process and reducing the damage caused by vibration or impact.

[0051] The connecting shaft 40 sequentially passes through the mounting flange 312 and the limit block 311 and is rotatably connected to the inner cavity 10a, making the entire installation process more convenient, saving installation time and cost; and increasing the contact area between the connecting shaft 40 and the follower 31, making the connection between the connecting shaft 40 and the follower 31 more stable.

[0052] In one embodiment, please refer to , a limit groove 31b is provided on the side of the follower 31 facing away from the mounting hole, and the connecting shaft 40 passes through the limit groove 31b; the locking mechanism 30 further includes a first spring 33 installed in the limit groove 31b, the first spring 33 is sleeved on the connecting shaft 40, and both ends of the first spring 33 are elastically abutted against the wall of the inner cavity 10a and the wall of the limit groove 31b respectively.

[0053] A limit groove 31b is provided on the side of the follower 31 facing away from the mounting hole. The position of the limit groove 31b is reasonably designed to ensure that when the connecting shaft 40 passes through the limit groove 31b, its movement trajectory is precisely controlled. The connecting shaft 40 passes through the limit groove 31b. One end of the connecting shaft 40 is fixedly connected to the main body structure of the follower 31, and the other end extends to the outside for connection with other components.

[0054] The locking mechanism 30 includes a first spring 33 installed in the limit groove 31b. The first spring 33 is sleeved on the connecting shaft 40, and both ends of the first spring 33 are elastically abutted against the wall of the inner cavity 10a and the wall of the limit groove 31b respectively. With this setting, the first spring 33 can provide appropriate elastic force for the follower 31, so that the entire follower 31 can also remain suspended in the inner cavity 10a of the housing 10 when being driven to rotate by the connecting shaft 40, avoiding the contact between the follower 31 and the wall of the inner cavity 10a of the housing 10, and enabling the follower 31 to perform high-speed rotational motion along with the connecting shaft 40.

[0055] On the other hand, the first spring 33 is sleeved on the connecting shaft 40, and its two ends are elastically abutted against the wall of the inner cavity 10a and the wall of the limit groove 31b respectively, forming an elastic support. This design enables the connecting shaft 40 to absorb part of the energy through the elastic deformation of the spring when subjected to external forces, thereby reducing the impact on the connecting shaft 40 and extending its service life.

[0056] In one embodiment, please refer to Figures 1 to 3, the locking mechanism 30 further includes a locking spring piece 34 sleeved on the connecting shaft 40, and the locking spring piece 34 elastically abuts against one side of the code disk 20 facing the mounting hole.

[0057] One end of the connecting shaft 40 is connected to the code disk 20, and the other end extends to an external device. The code disk 20 is a circular disk-shaped structure, which is provided with a perforation for the connecting shaft 40 to pass through. The locking spring piece 34 is a circular disk-shaped structure, and a circular through hole matching the connecting shaft 40 is provided inside it. The locking spring piece 34 has certain elasticity, and the locking block uses its own elasticity to press the code disk 20 in the direction away from the mounting hole, so that one side of the code disk 20 facing the mounting hole does not contact the wall of the inner cavity 10a, thereby ensuring that the code disk 20 can be normally driven to rotate by the connecting shaft 40.

[0058] In the specific implementation process, when the connecting shaft 40 rotates, the locking spring piece 34 rotates accordingly, and a certain pressure is always maintained on the contact surface between the locking spring piece 34 and the code disk 20, thereby realizing the locking of the code disk 20 on the connecting shaft 40.

[0059] In one embodiment, please refer to Figures 1 to 3 , the locking mechanism 30 further includes an elastic gasket 35 installed between the locking spring piece 34 and the code disk 20.

[0060] Specifically, the locking spring piece 34 is bent, one end of which is fixed on the locking mechanism housing, and the other end contacts the elastic gasket 35. The elastic gasket 35 is made of rubber or similar elastic material, and its shape is adapted to the contact end of the locking spring piece 34 to ensure a good contact effect. The code disk 20 is located above the elastic gasket 35 and is closely attached to the elastic gasket 35.

[0061] During the operation, when the user applies an external force to the locking mechanism, the locking spring piece 34 is under pressure and bends and deforms. At this time, the elastic gasket 35 is compressed and undergoes a certain elastic deformation. Since the elastic gasket 35 is closely attached to the code disk 20, the code disk 20 also undergoes elastic deformation. When the external force disappears, the locking spring piece 34 and the code disk 20 return to their original states, and the elastic gasket 35 also returns to its initial state, thereby realizing the locking and unlocking functions of the locking mechanism 30.

[0062] The elastic gasket 35 can effectively absorb and disperse the impact force generated by the locking spring piece 34 during the locking process, reduce the risk of damage to the code disk 20, and thus improve the buffering performance of the locking mechanism. Compared with the prior art, this design significantly reduces the possible mechanical damage during the locking process.

[0063] The presence of the elastic gasket 35 makes the locking force of the locking mechanism more uniform, avoiding the displacement or damage of the code disk 20 caused by uneven locking force. This improvement in stability not only ensures the locking effect but also helps to extend the service life of the locking mechanism.

[0064] In one embodiment, see Figures 1 to 3 The locking member 32 includes a second spring 321 and a ball latch 322. One end of the second spring 321 is connected to the wall of the inner cavity 10a. The ball latch 322 is connected to the other end of the second spring 321. The ball latch 322 is used to engage with one of the grooves 31a.

[0065] When the code disk 20 needs to be locked, the code disk 20 stops moving, so that the ball latch 322 is pushed into one of the grooves 31a of the limit block 311 of the follower 31 by the rebound force of the second spring 321. After the ball latch 322 enters one of the grooves 31a, the elastic force of the second spring 321 causes the ball latch 322 to tightly engage with the groove 31a, thereby achieving locking.

[0066] When the code disk 20 needs to be unlocked, the code disk 20 is driven to rotate at high speed, and the ball latch 322 is bounced out in sequence by the multiple grooves 31a on the limit block 311 of the code disk 20, so that the ball latch 322 no longer locks the limit block 311, and thus no longer locks the code disk 20.

[0067] The second spring 321 is made of an elastic material with a high elastic modulus, ensuring good elasticity even during multiple locking and unlocking operations. The ball latch 322 is designed to tightly engage with the groove 31a, enhancing locking stability. The material of the ball latch 322 should ensure stable performance in harsh environments such as high temperature and high pressure. The wall of the inner cavity 10a should be designed to ensure a secure connection with the second spring 321 to prevent it from falling off during operation.

[0068] One end of the second spring 321 is connected to the wall of the inner cavity 10a, ensuring that the second spring 321 effectively controls the ball latch 322. The ball latch 322 is connected to the other end of the second spring 321, so that the ball latch 322 can flexibly engage with the groove 31a, thereby achieving accurate locking of the code disk 20.

[0069] In existing technologies, unstable connection methods often lead to loosening of the structure when subjected to force, thus affecting the performance and safety of the product. The ball-engaging teeth 322 of the present invention are designed to tightly engage with the groove 31a, maintaining structural stability even under high forces, thereby ensuring the reliability and safety of the product in complex environments.

[0070] In one embodiment, see Figures 1 to 3 The shape of each groove 31 a matches the shape of the ball tooth 322 .

[0071] Since the shape of the groove 31a is adapted to that of the ball detent 322, the combination between the two is tighter, enhancing the overall strength and stability of the component. This design effectively reduces the loosening or detachment of the locking mechanism 30 caused by vibration or impact, thereby extending the service life of the product.

[0072] In one embodiment, refer to Figures 1 to 3 Figures 1 to 3 , the code disk 20 module further includes a photoelectric sensor 50 mounted on the outer wall of the housing 10. The housing 10 is provided with a detection hole communicating with the inner cavity 10a. The photoelectric sensor 50 is arranged corresponding to the detection hole for detecting the position of the code disk 20.

[0073] In the traditional technology, the detection of the position of the code disk 20 often relies on mechanical sensors or magnetic sensors. These methods either have detection errors or have high environmental requirements. The photoelectric sensor 50 in this case can accurately capture the position information of the code disk 20, effectively avoiding the unstable operation or misalignment of the code disk 20 caused by position errors, thereby ensuring the accurate reading and output of the code disk 20.

[0074] The present utility model also provides a card reader, which includes a housing, a microprocessor, an adjustment circuit and a code disk 20 module; the microprocessor is arranged in the housing; the adjustment circuit is arranged in the microprocessor and electrically connected to the microprocessor for adjusting the signal returned by the card and transmitting it to the microprocessor; the code disk 20 module is installed in the housing and is arranged at an interval from the microprocessor. The specific structure of the code disk 20 module refers to the above embodiment. Since this card reader adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one.

[0075] The adjustment circuit design adopted by the present utility model is directly arranged in the microprocessor and electrically connected to the microprocessor, which can quickly and accurately adjust the signal returned by the card. This design effectively shortens the signal processing time, improves the signal adjustment efficiency of the entire card reader, enables faster data reading, and significantly enhances the user experience.

[0076] As the core component of the card reader, the microprocessor integrates the adjustment circuit inside, which helps to improve the data processing ability. Compared with the prior art, the present utility model can better process complex data, reduce the possibility of data loss and errors, thereby ensuring the security and accuracy of the data.

[0077] The above are only exemplary embodiments of the present utility model, and do not limit the patent scope of the present utility model. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present utility model.

Claims

1. A code disk module, characterized in that, The code disk module includes: A housing having an inner cavity; A code disk rotatably mounted within the inner cavity; and A locking mechanism including a follower and a locking member. The follower is fixed to one end of the code disk, and the follower is provided with a plurality of grooves disposed around the follower. The locking member is provided on the inner cavity wall for engaging with one of the grooves when the code disk stops rotating to define the position of the code disk.

2. The code disk module according to claim 1, wherein, The housing is further provided with a mounting hole communicating with the inner cavity; The code disk module further includes a connecting shaft passing through the mounting hole. One end of the connecting shaft extends into the inner cavity and is rotatably connected to the inner cavity. The other end of the connecting shaft is used to connect with the driving wheel of the card reader. The follower is sleeved on the connecting shaft.

3. The code disk module according to claim 2, characterized in that, The follower includes: A limiting block, and a plurality of the grooves are located on the outer circumferential wall of the limiting block; and A mounting flange connected to one end of the limiting block and passing through the code disk. The connecting shaft sequentially passes through the mounting flange and the limiting block and is rotatably connected to the inner cavity.

4. The code disk module according to claim 3, characterized in that, A limiting groove is provided on the side of the follower facing away from the mounting hole, and the connecting shaft passes through the limiting groove; The locking mechanism further includes a first spring mounted in the limiting groove. The first spring is sleeved on the connecting shaft, and both ends of the first spring are elastically abutted against the inner cavity wall and the groove wall of the limiting groove respectively.

5. The code disk module according to claim 2, wherein, The locking mechanism further includes a locking elastic sheet sleeved on the connecting shaft, and the locking elastic sheet is elastically abutted against the side of the code disk facing the mounting hole.

6. The code disk module according to claim 5, characterized in that, The locking mechanism further includes an elastic gasket mounted between the locking elastic sheet and the code disk.

7. The code disk module according to any one of claims 1 to 6, characterized in that, The locking member includes: A second spring, one end of the second spring is connected to the inner cavity wall; and A ball engaging tooth connected to the other end of the second spring, and the ball engaging tooth is used for engaging with one of the grooves.

8. The code disk module according to claim 7, wherein The shape of each groove is adapted to the shape of the ball engaging tooth.

9. The code disk module according to claim 1, characterized in that, The code disk module further includes a photoelectric sensor mounted on the outer wall of the housing. The housing is provided with a detection hole communicating with the inner cavity, and the photoelectric sensor is correspondingly arranged with the detection hole for detecting the position of the code disk.

10. A card reader, characterized in that, The card reader includes: A housing; A microprocessor disposed within the housing; An adjustment circuit disposed in the microprocessor and electrically connected to the microprocessor for adjusting the signal returned by the card and transmitting it to the microprocessor; and The code disk module according to any one of claims 1 to 9, the code disk module is mounted within the housing and is spaced apart from the microprocessor.

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