Anti-locking structure of plug-in access control card slot

Abstract

The utility model belongs to the field of access control equipment structures, and particularly discloses an anti-jamming structure of a plug-in access control card slot, which comprises a shell and a sensing module arranged on the inner side surface of the shell, a socket is arranged on the end face of the shell, a plurality of first compression rollers arranged in the shell are arranged on one side of the socket, the plurality of first compression rollers are arranged at intervals, and a plurality of second compression rollers are arranged on the other side of the socket. The other opposite side of the socket is provided with a support hinged in the shell, a spring connected with the support and the shell, a second press roller and a third press roller, the second press roller and the third press roller are oppositely arranged on the two sides of a hinge fulcrum of the support, the second press roller and the third press roller are rotationally matched with the support, and the spring is arranged on one side of the hinge fulcrum of the support. The inserting opening, the second pressing roller and the third pressing roller are sequentially arranged, and when the third pressing roller is pressed to swing to a set angle, the distance between the second pressing roller and the first pressing roller is reduced to form an extrusion gap; according to the scheme, the entrance guard card can be prevented from tilting up in the entrance guard card slot, and the moving resistance is reduced, so that the moving smoothness and accuracy are improved.

Description

Technical Field

[0001] This utility model relates to the field of access control equipment structure, and in particular to an anti-jamming structure for an insertable access control card slot. Background Technology

[0002] With the development of IoT and communication technologies, contactless communication authentication has been widely applied to products in various fields. Among them, access control systems are one of the products that widely use contactless communication authentication. It mainly uses short-range signal communication and matching authentication to form an instant pairing relationship, acting as the switch of the access control system. This replaces the mechanical transmission and physical sensing structures in the access control system, simplifying the physical structure, thereby reducing the size, material costs, and assembly difficulty.

[0003] Currently, the unlocking method of contactless communication authentication access control systems mainly involves contactless communication authentication between the access card and the sensing module in the access card slot, thereby triggering the electronic lock to unlock. Before the access card communicates and authenticates with the sensing module, it needs to move within the access card slot to a designated position (i.e., within the sensing range of the sensing module). To avoid the access card not being able to move accurately and smoothly due to excessive gaps in the access card slot, a pair of pressure rollers is often used to clamp the access card. However, the contact between the pressure rollers and the access card is a single-point contact on one side. During the movement, the access card is prone to tilting around the contact point, causing it to get stuck and unable to move accurately, and may even cause wear and damage to the access card. When multiple pairs of pressure rollers are used, the assembly gap between the paired pressure rollers is often too small due to limitations in processing precision and the need to meet guiding requirements, which hinders the smooth movement of the access card. Utility Model Content

[0004] The purpose of this invention is to provide an anti-jamming structure for an insertable access card slot, which prevents the access card from tilting up in the slot, allowing the access card to move accurately into place, while reducing the resistance that hinders the access card, thereby improving the smoothness of the access card's movement.

[0005] The technical solution provided by this utility model is as follows: an anti-jamming structure for an insertable access card slot, comprising a housing and a sensing module disposed on the inner surface of the housing. An insertion port is provided on the end face of the housing. A plurality of first pressure rollers disposed within the housing are provided on one side of the insertion port. The plurality of first pressure rollers are arranged at intervals and are all rotatably engaged with the housing. A pressure roller assembly is provided on the opposite side of the insertion port. A slot channel is formed between the pressure roller assembly and the plurality of first pressure rollers. The pressure roller assembly includes a bracket hinged within the housing, a spring connecting the bracket and the housing respectively, and a second pressure roller and a third pressure roller disposed on both sides of the hinge fulcrum of the bracket. The second pressure roller and the third pressure roller are rotatably engaged with the bracket. The spring is disposed on one side of the hinge fulcrum of the bracket. The insertion port, the second pressure roller, and the third pressure roller are arranged sequentially. When the third pressure roller is pressed to swing to a set angle, the distance between the second pressure roller and the first pressure roller is reduced to form a squeezing gap for clamping the access card.

[0006] In the aforementioned anti-jamming structure of the insertable access card slot, the card slot channel extends obliquely toward the inner surface of the housing.

[0007] In the above-mentioned anti-jamming structure of the insert-type access control card slot, a first guide plate and a second guide plate are provided on the inner side of the housing, and the slot, the first guide plate, the second pressure roller, the third pressure roller and the second guide plate are sequentially arranged on the same side of the card slot channel.

[0008] In the above-mentioned anti-jamming structure of the insertable access card slot, a number of third guide plates are also provided on the inner side of the housing. The third guide plates are parallel to the first guide plate and the second guide plate, and the first pressure roller is disposed between adjacent third guide plates.

[0009] In the aforementioned anti-jamming structure of the insertable access card slot, a rubber layer is provided on the outer circumferential surface of the first pressure roller, the second pressure roller, and the third pressure roller.

[0010] In the aforementioned anti-jamming structure of the insertable access card slot, a clamp is connected inside the housing, and a notch is provided on the clamp. The bracket is detachably locked inside the clamp and rotates with the clamp.

[0011] In the above-mentioned anti-jamming structure of the insertable access card slot, there are two clamps, and the bracket is provided with a positioning part located between the two clamps. The outer diameter of the positioning part is larger than the inner diameter of the clamp.

[0012] In the aforementioned anti-jamming structure of the insertable access card slot, an installation groove is provided on the inner surface of the housing, and the two ends of the installation groove are open. The sensing module is detachably connected to the installation groove.

[0013] In the aforementioned anti-jamming structure of the insertable access card slot, the mounting slot is provided with several connecting posts for connection with bolts, and the connecting posts pass through the sensing module.

[0014] In the aforementioned anti-jamming structure of the insertable access card slot, the outer surface of the housing is provided with connecting ears for connecting to the panel, and the connecting ears are respectively located on opposite sides of the housing.

[0015] The beneficial effects of this utility model after adopting the above technical solution are as follows:

[0016] This technical solution constructs a card slot channel to guide the movement of access cards by setting a first pressure roller and a pressure roller assembly. The access card enters the card slot channel from the insertion port. Under the limiting action of the insertion port, the access card sequentially contacts the first pressure roller arranged at intervals and passes through the second pressure roller. At this time, the second pressure roller does not contact the access card but maintains a distance from it. The second pressure roller first limits the tilting of the access card within an allowable range, avoiding large deviations in the initial movement direction and avoiding increasing the movement resistance of the access card in the early stage. Subsequently, when the access card enters the gap between the first and third pressure rollers, the third pressure roller squeezes the access card, increasing the movement resistance of the access card. The access card, through the reaction force, pushes the third pressure roller outward, causing the second pressure roller to swing in the opposite direction relative to the third pressure roller around the hinge fulcrum of the bracket, that is, swinging towards the first pressure roller. The second pressure roller continuously approaches the first pressure roller until it comes into contact with the access card. At this point, the second and first pressure rollers together form a compression gap, and the springs connecting the bracket and the housing deform synchronously. The third pressure roller also abuts against the access card. Together, the third and second pressure rollers press the access card firmly against the first pressure roller. The single-point contact on one side of the access card changes to non-single-point contact, preventing the access card from tilting during later movement. Simultaneously, by rotating the bracket, the accuracy error of the third pressure roller is transferred to the second pressure roller, preventing increased resistance to the access card's movement due to an excessively small gap between the second and third pressure rollers. This technical solution not only prevents the access card from tilting within the access card slot, ensuring accurate movement, but also reduces resistance to the access card, thereby improving the smoothness of its movement. Attached Figure Description

[0017] Figure 1 This is a front view of the anti-jamming structure of the insert-type access control card slot according to Embodiment 1 of this utility model;

[0018] Figure 2This is a cross-sectional view of the anti-jamming structure of the insert-type access control card slot in Embodiment 1 of this utility model;

[0019] Figure 3 This is the utility model Figure 2 A magnified view of a portion of A;

[0020] Figure 4 This is a schematic diagram of the pressure roller assembly of Embodiment 1 of this utility model;

[0021] Figure 5 This is a diagram illustrating the effect of the anti-jamming structure of the insert-type access control card slot in Embodiment 1 of this utility model.

[0022] Figure 6 This is a top view of the anti-jamming structure of the insert-type access control card slot in Embodiment 1 of this utility model;

[0023] Figure 7 This is a side view of the anti-jamming structure of the insertable access card slot of Embodiment 1 of this utility model.

[0024] Reference numerals: 1. Housing; 2. Sensing module; 3. Panel; 4. First pressure roller; 5. Pressure roller assembly; 6. Access card;

[0025] 11. Connecting ear; 12. Mounting slot; 13. First guide plate; 14. Socket; 15. Third guide plate; 16. Connecting slot; 17. Second guide plate; 18. Connecting post;

[0026] 51. Second pressure roller; 52. Spring; 53. Clamp; 531. Notch; 54. Support; 541. Positioning part; 55. Third pressure roller. Detailed Implementation

[0027] The technical solution of this utility model will be further described in detail below with reference to specific embodiments, but this does not constitute any limitation on this utility model.

[0028] Example 1:

[0029] like Figure 1-7As shown, an anti-jamming structure for an insertable access control card slot includes a housing 1 and a sensing module 2 disposed on the inner surface of the housing 1. An insertion port 14 is provided on the end face of the housing 1. A plurality of first pressure rollers 4 disposed within the housing 1 are provided on one side of the insertion port 14. The plurality of first pressure rollers 4 are spaced apart and rotatably engaged with the housing 1. A pressure roller assembly 5 is provided on the opposite side of the insertion port 14. A slot channel is formed between the pressure roller assembly 5 and the plurality of first pressure rollers 4. The pressure roller assembly 5 includes a bracket 54 hinged within the housing 1. A spring 52 connects the bracket 54 and the housing 1 respectively, and a second pressure roller 51 and a third pressure roller 55 are respectively provided on both sides of the hinge fulcrum of the bracket 54. The second pressure roller 51 and the third pressure roller 55 are rotatably engaged with the bracket 54. The spring 52 is provided on one side of the hinge fulcrum of the bracket 54. The insertion port 14, the second pressure roller 51, and the third pressure roller 55 are arranged in sequence. When the third pressure roller 55 is pressed to swing to a set angle, the distance between the second pressure roller 51 and the first pressure roller 4 is reduced to form a squeezing gap for clamping the access card.

[0030] The specific working principle is as follows: by setting the first pressure roller 4 and the pressure roller assembly 5, a card slot channel is constructed to guide the movement of the access card 6. The access card 6 enters the card slot channel from the insertion port 14. Under the limiting action of the insertion port 14, the access card 6 contacts the first pressure roller 4 arranged at intervals in sequence and passes through the second pressure roller 51. At this time, the second pressure roller 51 does not contact the access card 6, but maintains a distance from the access card 6. The second pressure roller 51 first limits the tilting of the access card 6 within the allowable range, avoids a large deviation in the early movement direction, and avoids increasing the movement resistance of the access card 6 in the early movement. Subsequently, when the access card 6 enters the gap between the first pressure roller 4 and the third pressure roller 55, the third pressure roller 55 squeezes the access card 6, increasing the resistance to movement of the access card 6. The access card 6 pushes the third pressure roller 55 outward through the reaction force, causing the second pressure roller 51 to swing in the opposite direction relative to the third pressure roller 55 around the hinge fulcrum of the bracket 54, that is, swinging towards the first pressure roller 4. The second pressure roller 51 continuously approaches the first pressure roller 4 until it comes into contact with the access card 6. At this point, a squeezing gap is formed between the second pressure roller 51 and the first pressure roller 4, and the spring 52 deforms synchronously. The third pressure roller 55 also abuts against the access card 6. Together with the second pressure roller 51, the third pressure roller 55 presses the access card 6 firmly against the first pressure roller 4. The single-point contact on one side of the access card 6 changes to a non-single-point contact, preventing the access card 6 from tilting during subsequent movement. Simultaneously, by rotating the bracket 54, the accuracy error of the third pressure roller 55 is transferred to the second pressure roller 51, preventing increased resistance to the movement of the access card 6 due to an excessively small gap between the second and third pressure rollers 51 and 55. This technical solution not only prevents the access card 6 from tilting within the access card slot, ensuring accurate movement, but also reduces resistance to the access card 6, thereby improving the smoothness of its movement.

[0031] Combination Figure 2 and Figure 5 As shown, in this embodiment, the spring 52 is disposed between the hinge fulcrum of the second pressure roller 51 and the bracket 54. At this time, the spring 52 is a tension spring. When the second pressure roller 51 approaches the first pressure roller 4, the spring 52 extends. When the third pressure roller 55 is no longer compressed, the spring 52 contracts, driving the second pressure roller 51 away from the first pressure roller 4 until the second pressure roller 51 swings back to the initial position.

[0032] In some embodiments, the spring 52 can also be disposed between the hinge point of the third pressure roller 55 and the bracket 54. In this case, the spring 52 is a compression spring. When the third pressure roller 55 moves away from the first pressure roller 4, the spring 52 is compressed. When the third pressure roller 55 is no longer compressed, the spring 52 extends and pushes the third pressure roller 55 closer to the first pressure roller 4, indirectly driving the second pressure roller 51 away from the first pressure roller 4, until the third pressure roller 55 swings back to the initial position.

[0033] Combination Figure 2 , Figure 5 and Figure 7 As shown, in a further improvement, the card slot channel is inclined and extends toward the inner surface of the housing 1.

[0034] The card slot channel is tilted so that the insertion port 14 on the housing 1 is far away from the panel 3, increasing the distance between the access card 6 and the panel 3 at that point, freeing up the space between the access card 6 and the panel 3, making it easier for the operator to hold the access card 6.

[0035] like Figure 2 As shown, preferably, the inner side of the housing 1 is provided with a first guide plate 13 and a second guide plate 17, and the insertion port 14, the first guide plate 13, the second pressure roller 51, the third pressure roller 55 and the second guide plate 17 are sequentially arranged on the same side of the slot channel.

[0036] Based on the limiting position of the slot 14, the first guide plate 13 is set so that the access card 6 is guided by the first guide plate 13 before reaching the second pressure roller 51. The first guide plate 13 limits the tilting of the access card 6 within the allowable range, and avoids large deviations in the movement direction in advance. The setting of the second guide plate 17 balances the squeezing force generated by the first pressure roller 4 opposite to the second guide plate 17, so as to prevent the access card 6 from warping and deforming, thereby avoiding the reduction of movement smoothness due to increased movement resistance of the access card 6.

[0037] In another preferred embodiment, a plurality of third guide plates 15 are provided on the inner side of the housing 1. The third guide plates 15 are parallel to the first guide plate 13 and the second guide plate 17, and the first pressure roller 4 is disposed between adjacent third guide plates 15.

[0038] The third guide plate 15 is designed to prevent the access card 6 from getting stuck on the first pressure roller 4 during movement.

[0039] Another improvement is that the outer circumferential surfaces of the first pressure roller 4, the second pressure roller 51, and the third pressure roller 55 are all provided with a rubber layer.

[0040] The rubber layer improves the tolerance of the first pressure roller 4, the second pressure roller 51, and the third pressure roller 55 to accuracy errors. For example, when the gap between the third pressure roller 55 and the first pressure roller 4, and / or the second pressure roller 51 and the first pressure roller 4 is too large, the rubber layer can fill the gap. Conversely, when the gap between the third pressure roller 55 and the first pressure roller 4, and / or the second pressure roller 51 and the first pressure roller 4 is too small, the space can be released by the deformation of the rubber layer itself, thereby increasing the gap.

[0041] like Figure 4 As shown, the specific connection between the bracket 54 and the housing 1 is as follows: a clamp 53 is connected inside the housing 1, and a notch 531 is opened on the clamp 53. The bracket 54 is detachably locked inside the clamp 53 and rotates with the clamp 53.

[0042] During installation, the bracket 54 is inserted into the inner ring of the clamp 53 through the notch 531 of the clamp 53.

[0043] In practical applications, there are two clamps 53, and the bracket 54 is provided with a positioning part 541 located between the two clamps 53. The outer diameter of the positioning part 541 is larger than the inner diameter of the clamp 53.

[0044] The two clamps 53 cooperate with the positioning part 541. By setting the outer diameter of the positioning part 541 to be larger than the inner diameter of the clamp 53, the bracket 54 cannot slide relative to the clamp 53 along the axial direction of the clamp 53, thus ensuring the working stability and reliability of the pressure roller assembly 5.

[0045] like Figure 2 As shown, a connecting groove 16 is also provided on the inner side of the housing 1, and the clamp 53 is fixed on the connecting groove 16. The specific fixing method can be ultrasonic welding, adhesive or bolt connection, etc. This embodiment does not impose too many restrictions on this.

[0046] like Figure 1 As shown, as a further improvement of this embodiment, a mounting groove 12 is provided on the inner surface of the housing 1. The two ends of the mounting groove 12 are open, and the sensing module 2 is detachably connected in the mounting groove 12.

[0047] The mounting slot 12 allows the sensing module 2 located there to be closer to the access card 6 located in the card slot channel through its concave structure, thereby comprehensively improving the sensing efficiency and sensing quality.

[0048] In this embodiment, the second guide plate 17 and the bottom of the mounting groove 12 are combined into one, that is, the second guide plate 17 is the bottom of the mounting groove 12, which simplifies the structure and reduces the volume, weight and cost of materials.

[0049] like Figure 3 As shown, the specific connection method of the fixed sensing module 2 is as follows: the mounting groove 12 is provided with a number of connecting posts 18 for bolt connection, and the connecting posts 18 penetrate the sensing module 2.

[0050] In the specific connection, the bolt is screwed into the connecting post 18, and the head of the bolt presses against the sensing module 2. A washer can also be added between the head of the bolt and the sensing module 2 so that the sensing module 2 can be fixed by bolts of different lengths, improving the versatility of parts and reducing procurement costs.

[0051] Combination Figure 1 and Figure 6 As shown, in addition, the outer surface of the housing 1 is provided with connecting ears 11 for connecting with the panel 3, and the connecting ears 11 are respectively located on opposite sides of the housing 1.

[0052] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. A dead card prevention structure of an inserted access card slot, comprising a shell and an induction module arranged on the inner side surface of the shell, and a socket is arranged on the end surface of the shell, characterized in that, One side of the socket is provided with a plurality of first pressure rollers disposed within the housing. The plurality of first pressure rollers are arranged at intervals and are all rotatably engaged with the housing. On the opposite side of the socket is provided a pressure roller assembly. A slot channel is formed between the pressure roller assembly and the plurality of first pressure rollers. The pressure roller assembly includes a bracket hinged within the housing, a spring connecting the bracket and the housing respectively, and a second pressure roller and a third pressure roller disposed on opposite sides of the hinge fulcrum of the bracket. The second pressure roller and the third pressure roller are both rotatably engaged with the bracket. The spring is disposed on one side of the hinge fulcrum of the bracket. The socket, the second pressure roller, and the third pressure roller are arranged in sequence. When the third pressure roller is pressed to swing to a set angle, the distance between the second pressure roller and the first pressure roller is reduced to form a squeezing gap for clamping the access card.

2. The anti-jamming structure of the plug-in access card slot according to claim 1, wherein, The slot channel extends at an angle toward the inner surface of the housing.

3. The anti-jamming structure of the plug-in access card slot according to claim 1, wherein, The inner side of the housing is provided with a first guide plate and a second guide plate, and the slot, the first guide plate, the second pressure roller, the third pressure roller and the second guide plate are sequentially arranged on the same side of the slot channel.

4. The anti-jamming structure of the plug-in access card slot according to claim 3, characterized in that, The inner side of the housing is also provided with a plurality of third guide plates, the third guide plates being parallel to the first guide plate and the second guide plate, and the first pressure roller being disposed between adjacent third guide plates.

5. The anti-jamming structure of the plug-in access card slot according to claim 1, wherein, The outer circumferential surfaces of the first pressure roller, the second pressure roller, and the third pressure roller are all provided with a rubber layer.

6. The anti-jamming structure of the plug-in access card slot according to any one of claims 1-5, characterized in that, The housing is connected to a clamp with a notch. The bracket is detachably engaged with the clamp and rotates with it.

7. The anti-jamming structure of the plug-in access card slot according to claim 6, characterized in that, The bracket has two clamps, and the bracket has a positioning part located between the two clamps. The outer diameter of the positioning part is larger than the inner diameter of the clamp.

8. The anti-jamming structure of the plug-in access card slot according to any one of claims 1-5, characterized in that, The inner surface of the housing has a mounting groove with both ends open, and the sensing module is detachably connected to the mounting groove.

9. The anti-jamming structure of the plug-in access card slot according to claim 8, characterized in that, The mounting slot is provided with several connecting posts for bolt connection, and the connecting posts pass through the sensing module.

10. The anti-jamming structure of the plug-in access card slot according to any one of claims 1-5, characterized in that, The outer surface of the housing is provided with connecting ears for connecting to the panel, and the connecting ears are located on opposite sides of the housing.

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