Key slot recognition device

Abstract

This invention provides a key slot identification device, which includes a detection unit and a linkage structure corresponding to the detection unit. The key slot identification device has a keyhole. The linkage structure includes a linkage part and a detection part. The linkage part is located at the keyhole and can be driven by a key inserted into and rotated in the keyhole, causing the detection part to move to the detection area of ​​the detection unit. This invention eliminates the need for clamping, aligning, and positioning the key, and also eliminates the need to wait for the contacts to slowly advance and detect each key slot individually. It can efficiently complete the key slot identification work with simple operation, effectively improving blade assembly efficiency.

Description

Technical Field

[0001] This invention relates to the field of automated lock manufacturing technology, and specifically to a key slot recognition device. Background Technology

[0002] An automatic lock leaf assembly machine includes a key fixing seat, a key slot identification device, a leaf feeding device, and a leaf stacking device.

[0003] A key holder is provided with a key clamp that can hold a horizontally placed key with the key's grooves facing upwards. The key groove recognition device includes a contact member that can move horizontally along the extension direction of the key. The contact member's contact point extends downwards and can float up and down. When the contact member floats up and down, it can drive a lever to swing up and down and move between multiple detection switches. When the contact member moves horizontally, it can continuously contact the different grooves of varying depths on the key. Correspondingly, the lever moves to the detection range of different detection switches. The system can identify the blade corresponding to each key groove and feed and stack the blades according to the identification results.

[0004] The problem with the existing key slot recognition device is that when recognizing the key's tooth slots, the key must first be clamped with a clamp, and then the contact part must be slowly moved to recognize each of the multiple tooth slots on the key. The whole process is time-consuming and affects production efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a key slot recognition device that is simple to operate and quick to identify key slots, thereby effectively improving production efficiency.

[0006] The key slot recognition device provided by the present invention includes a linkage structure and a detection unit for detecting the linkage structure; the key slot recognition device is provided with a key socket; at least two linkage structures are arranged sequentially along the insertion direction of the key socket; the linkage structure includes a linkage part and a detection part, the linkage part is disposed at the key socket, and the linkage part can be driven by a key inserted into the key socket and rotated, thereby moving the detection part to the detection area of ​​the detection unit.

[0007] As can be seen from the above scheme, the key slot recognition device of the present invention is set in the form of a lock. Since multiple key slots have different depths or different angles, inserting and turning the key can simultaneously cause multiple linkage structures to move with different displacements. Therefore, multiple linkage structures can enter the detection area of ​​different detection units. The system can then detect the blade corresponding to each key slot and perform the next step of blade matching control. It is evident that the operator only needs to insert and turn the key, and the system can obtain the detection result. Compared with the prior art, the present invention does not require clamping, aligning, or positioning the key, nor does it require waiting for the contacts to slowly advance and detect and identify one by one. It can complete the key slot recognition work efficiently with simple operation.

[0008] A further design is to allow the linkage to rotate around the keyhole.

[0009] As can be seen from the above, compared with setting the linkage part to a linear movement form, this setting makes it easier for the linkage part to form a tight cooperation with the rotating key and facilitates the generation of a larger displacement for the detected part. It also allows multiple different detection units that cooperate with the same detected part to be arranged separately, avoiding the problem of incorrect identification.

[0010] A further proposed solution is that the linkage structure includes a swing arm, with the linkage part and the detected part located at the two ends of the extension of the swing arm, and the swing arm can swing around the keyhole.

[0011] As can be seen from the above, the linkage structure, including the swing arm, arranges multiple detection units corresponding to the same linkage structure at intervals along the circumference. Under this setting, the multiple recognition units are distributed at large intervals, which can effectively avoid the problem of misidentification.

[0012] A further proposed solution is that the linkage structure includes a reset mechanism, and the key slot recognition device includes a fixed part; the reset mechanism includes an elastic element, which is disposed between the fixed part and the swing arm.

[0013] Another further option is that the reset mechanism includes a flexible traction component and a counterweight component. The counterweight component and the swing arm component are respectively tractioned at both ends of the extension of the flexible traction component. The middle of the extension of the flexible traction component is supported on a fixed part, and the counterweight component is suspended by the flexible traction component.

[0014] As can be seen from the above, in the design of the reset mechanism, the elastic element can indeed achieve the reset of the pendulum rod very well; however, when the operator turns the key, the elastic element is actually in the process of storing energy, and the resetting force on the pendulum rod gradually increases. Therefore, the operator needs to gradually increase the torque. On the other hand, the combination of flexible traction components such as slings and counterweights not only provides the resetting force for the pendulum rod, but also keeps the resetting force constant. Therefore, the operator does not need to gradually increase the force when turning the key, making the operation easier.

[0015] A further proposed solution involves multiple swing arms comprising a single straight swing arm and multiple bent swing arms arranged sequentially along the insertion direction. Each bent swing arm includes a first extension, a transverse extension, and a second extension, all connected at right angles from the linkage to the detection part. The multiple swing arms conform to the following design principles: taking the single straight swing arm as a base, among the multiple bent swing arms arranged on the same side of the straight swing arm in the insertion direction: the closer to the straight swing arm, the longer the first extension, the shorter the transverse extension, and the shorter the second extension of the bent swing arm; the farther away from the straight swing arm, the shorter the first extension, the longer the transverse extension, and the longer the second extension of the bent swing arm.

[0016] As can be seen above, the multiple toothed grooves on the key are arranged sequentially along the length of the key. Similarly, the multiple photoelectric switches in the multiple photoelectric switch groups are also arranged along the length of the key. However, the size span of the multiple photoelectric switches in each photoelectric switch group is much larger than the size span of all the toothed grooves on the key. Therefore, the multiple linkage parts of the multiple swing rods need to be compactly arranged side by side, while the multiple detected parts need to be arranged with a large interval. For this reason, the multiple swing rods need to be bent. Under this premise, it is also necessary to consider that the multiple swing rods bent together should not interfere with each other. Therefore, the present invention derives the above design principle, which can satisfy the requirement that the multiple swing rods are compactly arranged at one end and widely spaced at the other end without interfering with each other.

[0017] Another further option is that the linkage structure includes an active component and a passive component, with the linkage part set on the active component and the detection part set on the passive component. When the active component rotates, the passive component is driven by the active component to translate or rotate linearly.

[0018] As can be seen from the above, when the driven part of the linkage structure moves along a straight line or curve, multiple detection units corresponding to the same linkage structure are arranged at intervals along the straight line or curve. This arrangement makes the overall structure of the key slot recognition device compact and its size small.

[0019] A further approach is to use tooth surface transmission between the driving and driven components.

[0020] As can be seen from the above, compared with the linkage slider mechanism, the use of gear and rack mechanism is not only beneficial to the transmission accuracy, but also makes the overall structure of the key slot recognition device more compact and more conducive to small size design.

[0021] A further embodiment is that the key slot identification device includes a rotating connecting seat, a pin, and a fixing plate; the rotating connecting seat has multiple slots arranged at intervals along the insertion direction, with adjacent slots forming a baffle wall, and the rotating connecting seat has pin holes and second insertion holes that penetrate through the multiple baffle walls along the insertion direction; the fixing plate has through holes and mounting notches opening at the outer periphery of the fixing plate, and multiple fixing plates are respectively installed into multiple slots, with the pin passing through the multiple through holes and multiple pin holes arranged in an alternating manner; the linkage part is rotatably installed into the mounting notch.

[0022] As can be seen from the above, the multiple toothed grooves of the key are compactly arranged along its length. The linkage components of the multiple linkage structures are not only relatively thin, but also need to be rotatably installed onto the rotating connecting seat one by one. Under these conditions, the connection between the linkage components and the rotating connecting seat presents installation difficulties. To address this, the present invention adds a fixing plate and a pin. The linkage component can be easily embedded in the mounting notch of the fixing plate. When the fixing plate is placed into the slot, both the fixing plate and the linkage component are restricted by the retaining wall. After inserting the pin, the fixing plate is fixed, while the linkage component retains only rotational freedom. This design effectively reduces assembly difficulty and improves production efficiency.

[0023] A further approach is to have at least two detection units corresponding to the linkage structure, and to have multiple detection units corresponding to the linkage structure arranged at intervals along the moving direction of the detected part of the linkage structure. Attached Figure Description

[0024] Figure 1 This is a structural diagram of the first embodiment of the key slot recognition device of the present invention with some parts removed, viewed from a first perspective.

[0025] Figure 2 This is a structural diagram of the bent swing rod in the first embodiment of the key slot recognition device of the present invention.

[0026] Figure 3 This is an exploded view of the structure of the first embodiment of the key slot recognition device of the present invention.

[0027] Figure 4 This is a structural diagram of the key in the first embodiment of the key slot recognition device of the present invention.

[0028] Figure 5 This is a cross-sectional view of three different key slots on the key in the first embodiment of the key slot recognition device of the present invention.

[0029] Figure 6 This is a schematic diagram showing the three different key slots on the key and their respective cooperation with the swing rod in the first embodiment of the key slot recognition device of the present invention.

[0030] Figure 7 This is a structural diagram of the first embodiment of the key slot recognition device of the present invention with some parts removed, viewed from a second perspective.

[0031] Figure 8 This is a structural diagram of a second embodiment of the key slot recognition device of the present invention.

[0032] Figure 9 This is a structural diagram of the third embodiment of the key slot recognition device of the present invention.

[0033] Figure 10 This is a schematic diagram of the detection results of each photoelectric switch group in an embodiment of the key slot recognition device of the present invention. Detailed Implementation

[0034] First embodiment of key slot recognition device

[0035] The automatic lock blade assembly machine can identify different blades that match the tooth grooves on the key through the key slot recognition device, and then control the corresponding blade feeding device to send out the blades.

[0036] See Figure 1 The key slot recognition device 2 in this embodiment includes a fixed base 29 for fixing to the workbench; it also includes a rotating connecting base 28, multiple swing rods 21, a first photoelectric switch group 221, a second photoelectric switch group 222, and a third photoelectric switch group 223. The second and third photoelectric switch groups 222 and 223 each include 8 photoelectric switches, while the first photoelectric switch group 221 includes 9 photoelectric switches. In this embodiment, the swing rods 21 are the linkage structure of the present invention, and the photoelectric switches are the detection units of the present invention. The rotating connecting base 28 is fixed on the fixed base 29. See [reference needed]. Figure 2 The two extended ends of the swing rod 21 are a linkage part 211 and a detection part 212, respectively. The linkage part 211 is provided with a first insertion hole 210 that passes through both sides of its own thickness. The linkage part 211 is rotatably mounted on the rotating connecting seat 28. The detection part 212 is the swing free end. In this embodiment, the first photoelectric switch group 221, the second photoelectric switch group 222, and the third photoelectric switch group 223 are arranged at intervals around the swing center of the linkage part 211. After the swing rod 21 swings with the location of the linkage part 211 as the swing center, it can reach the detection area of ​​any one of the first photoelectric switch group 221, the second photoelectric switch group 222, and the third photoelectric switch group 223.

[0037] See Figure 2 Of the multiple lever components 21, only one extends in a straight line, while the others are bent to varying degrees. This is because each lever component 21 is used to mate with each toothed groove on the key 9, and... Figure 4 As shown, multiple tooth grooves, including the first tooth groove 91, the second tooth groove 92, and the third tooth groove 93, are along the length direction of the key 9. Figure 1As shown in the x-axis direction, similarly, multiple photoelectric switches in the three photoelectric switch groups are also arranged along the x-axis direction. However, in the x-axis direction, the size span of one photoelectric switch group is much larger than the size span of all the toothed grooves on the key 9. Therefore, the multiple linkage parts 211 of the multiple swing rods 21 need to be compactly arranged side by side, while the multiple detected parts 212 need to be arranged with a larger interval. Therefore, as shown in the x-axis direction, the multiple linkage parts 211 of the multiple swing rods 21 need to be compactly arranged side by side, while the multiple detected parts 212 need to be arranged with a larger interval. Figure 2 As shown, the bent swing arm 21 includes a first extension 21a, a transverse extension 21b, and a second extension 21c, which are sequentially bent at 90-degree angles from the linkage part 211 to the detection part 212. Further, see also... Figure 1 and Figure 3 To prevent the lateral extensions 21b of multiple bent pendulum members 21 from interfering with each other and to ensure the effective movement of multiple pendulum members 21, the following design rules should be met among the multiple pendulum members 21: Taking the single straight pendulum member 21 as the basis, in the x-axis direction, bent pendulum members 21 can be set on both sides of the straight pendulum member 21. On the same side of the straight pendulum member 21, among the multiple bent pendulum members 21, the closer to the straight pendulum member 21, the longer the first extension 21a, the shorter the lateral extension 21b, and the shorter the second extension 21c of the bent pendulum member 21. Conversely, the farther away from the straight pendulum member 21, the shorter the first extension 21a, the longer the lateral extension 21b, and the longer the second extension 21c of the bent pendulum member 21.

[0038] In addition, in this embodiment, multiple photoelectric switches in the first photoelectric switch group 221, multiple photoelectric switches in the second photoelectric switch group 222, and multiple photoelectric switches in the third photoelectric switch group 223 are all arranged along the x-axis direction in their respective groups. Whether the pendulum member 21 extends in a straight line or in a bent direction, the length of all the pendulum members 21 is equal in the projection along the x-axis direction.

[0039] See Figure 3 The key slot identification device 2 also includes a pin 26 and a fixing piece 27. The rotating connecting seat 28 has multiple slots 281 arranged at intervals along the x-axis, with baffles 282 formed between adjacent slots 281. The rotating connecting seat 28 also has pin holes 280 and second insertion holes 283 that penetrate the multiple baffles 282 along the x-axis. The fixing piece 27 has two through holes 270 and an installation notch 271 opening at the outer periphery of the fixing piece 27. Multiple fixing pieces 27 can be installed into multiple slots 281 respectively. Then, the through holes 270 and pin holes 280 are aligned, and the pin 26 passes through the staggered through holes 270 and pin holes 280 to fix the multiple fixing pieces 27 onto the rotating connecting seat 28.

[0040] The linkage part 211 has a circular outer contour, while the mounting notch 271 has a circular inner contour. After the linkage part 211 is installed into the mounting notch 271, it is restricted by the mounting notch 271 and can only swing around a fixed axis. Since the opening angle of the mounting notch 271 is less than 180 degrees, the linkage part 211 will not disengage from the mounting notch 271 along the extension direction of the fixing piece 27. Furthermore, when the fixing piece 27 is installed into the rotating connecting seat 28, both sides of the mounting notch 271 are restricted by a baffle 282 in the thickness direction of the fixing piece 27. Therefore, a reliable rotational connection is formed between the swing rod 21 and the rotating connecting seat 28. At this time, the multiple second insertion holes 283 and the multiple first insertion holes 210 on the linkage parts 211 are interconnected to form the keyhole 200 of the present invention, and the multiple linkage parts 211 rotate around the keyhole 200.

[0041] See Figure 4 and Figure 5 In this embodiment, the key 9 is provided with eight toothed grooves, which are composed of three different toothed grooves. The three toothed grooves are the first toothed groove 91, the second toothed groove 92, and the third toothed groove 93. In this embodiment, the eight toothed grooves on the key 9 are arranged in sequence as the second toothed groove 92, the third toothed groove 93, the first toothed groove 91, the second toothed groove 92, the third toothed groove 93, the second toothed groove 92, the first toothed groove 91, and the second toothed groove 92.

[0042] See Figure 5 When the key 9 is placed horizontally, its width is aligned with the horizontal direction, and its thickness is aligned with the vertical direction. Refer to the cross-sections of the first tooth groove 91, the second tooth groove 92, and the third tooth groove 93. In this embodiment, the first tooth groove 91 is not actually grooved; its cross-section is approximately rectangular, and the first mating surface 911 of the first tooth groove 91 extends horizontally. The second tooth groove 92 and the third tooth groove 93 are both grooved to varying degrees, resulting in different angles of inclination between the second mating surface 921 of the second tooth groove 92 and the third mating surface 931 of the third tooth groove 93 and the horizontal direction. The angle between the extension direction of the third mating surface 931 and the horizontal direction is larger than that of the second mating surface 921.

[0043] See Figure 6When key 9 is inserted into keyhole 200 along the x-axis, the eight toothed grooves will respectively enter the first insertion hole 210 of the corresponding swing rod 21. The inner contour of the first insertion hole 210 is approximately rectangular, and different toothed grooves with different outer contours will produce different linkage effects after entering and rotating the first insertion hole 210. When the first toothed groove 91 enters the first insertion hole 210 and key 9 is turned, ignoring the influence of the mating clearance, the first mating surface 911 of the first toothed groove 91 will immediately abut against the inner wall of the first insertion hole 210 and immediately drive the corresponding swing rod 21 to swing. When key 9 rotates 90°, the swing rod 21 corresponding to the first toothed groove 91 will also rotate 90°. When the second toothed groove 92 enters the first socket 210 and the key 9 is turned, the second mating surface 921 forms a first angle α with the inner wall of the first socket 210. After the key 9 turns through angle α, the second mating surface 921 can abut against the inner wall of the first socket 210, thus driving the rocker arm 21. Therefore, when the key 9 turns 90°, the rocker arm 21 corresponding to the second toothed groove 92 turns 90°-α. Similarly, when the third toothed groove 93 enters the first socket 210 and the key 9 is turned, the third mating surface 931 forms a second angle b with the inner wall of the first socket 210. After the key 9 turns through angle b, the third mating surface 931 can abut against the inner wall of the first socket 210, thus driving the rocker arm 21. Therefore, when the key 9 turns 90°, the rocker arm 21 corresponding to the third toothed groove 93 turns 90°-b. In this embodiment, the first included angle a is 30° and the second included angle b is 60°.

[0044] Combined Figure 7 The arrangement of the first photoelectric switch group 221, the second photoelectric switch group 222, and the third photoelectric switch group 223 is related to the first included angle α and the second included angle β. In this embodiment, the swing rod 21 in the initial position is vertical, the line connecting the first photoelectric switch group 221 and the keyhole 200 extends horizontally and forms a 90-degree angle with the swing rod 21, the angle between the line connecting the second photoelectric switch group 222 and the keyhole 200 and the swing rod 21 is 90°-α = 60°, and the angle between the line connecting the third photoelectric switch group 223 and the keyhole 200 and the swing rod 21 is 90°-β = 30°.

[0045] Therefore, when the key 9 is inserted into the keyhole 200 and the key 9 is turned, the nine rocker arms 21 will be driven by the corresponding tooth grooves and rotate at the corresponding angles. The detection part 212 of the nine rocker arms 21 will reach the detection area of ​​the corresponding photoelectric switch in the first photoelectric switch group 221, the second photoelectric switch group 222 and the third photoelectric switch group 223.

[0046] In addition, in this embodiment, the key 9 has eight toothed grooves, the second photoelectric switch group 222 and the third photoelectric switch group 223 each have eight photoelectric switches, while the number of rocker arm members 21 and the number of photoelectric switches in the first photoelectric switch group 221 are nine. This arrangement is intended to provide a ninth rocker arm member 21 that engages with the ungrooved portion of the key 9, in addition to the eight rocker arm members 21 that each engage with one of the eight toothed grooves. When the key 9 rotates, the ungrooved portion of the key 9 engages with the rocker arm member 21, allowing the rocker arm member 21 to rotate 90° and reach the detection area of ​​the ninth photoelectric switch in the first photoelectric switch group 221. The system controls multiple photoelectric switch groups to start the recognition process based on the detection signal corresponding to the ninth rocker arm member 21. The reason is... (See...) Figure 7 Taking a swing arm 21 that is about to rotate 90° as an example, the swing arm 21, which mates with the toothed groove, will inevitably pass through the detection areas of the second photoelectric switch group 222 and the third photoelectric switch group 223 before reaching the detection area of ​​the first photoelectric switch group 221. If multiple photoelectric switch groups are always in the start detection state, the system will make a misjudgment. To this end, the present invention uses the ninth swing arm 21 as the start-stop control swing arm and the ninth photoelectric switch in the first photoelectric switch group 221 as the start-stop control photoelectric switch that keeps the system in working state. When the start-stop control swing arm reaches the detection area of ​​the start-stop control photoelectric switch of the first photoelectric switch group 221, and all other swing arms 21 have also reached the detection area of ​​their corresponding photoelectric switch groups, the system activates each photoelectric switch group according to the detection signal of the start-stop control swing arm obtained by the start-stop control photoelectric switch, thereby avoiding misjudgment.

[0047] In this embodiment, the mounting base 29 includes a vertical sidewall and multiple cantilever arms 291 extending horizontally from the surface of the sidewall. The cantilever arms 291 are the fixing parts of the invention, and both the sidewall and the cantilever arms 291 are fixedly installed. The first photoelectric switch group 221, the second photoelectric switch group 222, and the third photoelectric switch group 223 are each fixed to the mounting base 29 via their respective cantilever arms 291. See also... Figure 8 In this embodiment, each swing rod 21 and the cantilever 291 are provided with a tension spring 23, which serves as a reset mechanism and an elastic element. After multiple swing rods 21 complete the identification, they can be reset by the restoring force of the tension spring 23.

[0048] Second embodiment of key slot recognition device

[0049] See Figure 8 In this embodiment, the reset mechanism 73 includes a cable 731 and a weight 732. The weight 732 and the swing rod 71 are respectively pulled at both ends of the extension of the cable 731. The middle of the extension of the cable 731 is supported on the fixed part 791, and the weight 732 is suspended by the cable 731.

[0050] Third embodiment of key slot recognition device

[0051] See Figure 9 In this embodiment, the key slot recognition device does not use a rocker arm as a linkage structure. The linkage structure includes an active member 811 and a driven member 812. The linkage part is disposed on the active member 811, and the recognized part 8121 is disposed in the form of a protrusion at the edge of the driven member 812. Under the restriction of the device, the active member 811 can only rotate, and the driven member 812 can only translate along a straight line. The active member 811 and the driven member 812 are connected by tooth surface transmission. The active member 811 is also provided with an inner periphery that is roughly rectangular, for forming a keyhole and a key through which the key passes. Multiple photoelectric switches and multiple identified parts 8121 are arranged on opposite sides of the follower 812 in the width direction. The multiple photoelectric switches and multiple identified parts 8121 are respectively set at different distances in front of the follower 812 in the forward direction. When the operator turns the key, the multiple driving parts 811 rotate at different angles, so that the multiple follower 812 can move forward at different distances and reach different distances, thereby allowing the identified parts 8121 to reach the detection area of ​​the corresponding detection unit.

[0052] Furthermore, in the first embodiment, the eight photoelectric switches of the three photoelectric switch groups are arranged in a row along the x-axis, which results in a relatively large overall size of the key slot recognition device. This embodiment, however, arranges the multiple identified parts 8121 and multiple photoelectric switch groups in a staggered manner along the linear extension direction of the driven member 812. This arrangement significantly reduces the space required for arranging the photoelectric switches, making the key slot recognition device more compact and smaller in size. Since some keys have more and more different types of toothed grooves, this embodiment allows for the inclusion of more linkage structures and photoelectric switches.

[0053] In addition, in this embodiment, the follower 812 is a long condition, the follower 812 is vertically arranged and its translation direction is vertical. Under this arrangement, when the key is turned to complete the recognition and the key is pulled out, the follower 812 can fall back to its original position by its own gravity.

[0054] staff holding Figure 4 The key 9 shown is inserted into the keyhole 200 and twisted 90 degrees. Under the force of the key 9, the detection part 212 of the eight swing rods 21 swings to the detection area of ​​the corresponding photoelectric switch.

[0055] At this moment, when the start-stop control lever reaches the detection area of ​​the start-stop control photoelectric switch of the first photoelectric switch group 221, and all other levers 21 also reach the detection area of ​​their corresponding photoelectric switch groups, the system activates each photoelectric switch group based on the detection signal of the start-stop control lever obtained by the start-stop control photoelectric switch. The system then obtains the detection signals of all photoelectric switches.

[0056] If all the rocker arms 21 driven by key 9 swing accurately, the circular patterns corresponding to the eight photoelectric switches of the first photoelectric switch group 221, the eight photoelectric switches of the second photoelectric switch group 222, and the eight photoelectric switches of the third photoelectric switch group 223 on the display screen will appear as follows: Figure 10 When illuminated as shown, it can be seen that if all the rocker arms 21 driven by key 9 swing accurately, all the rocker arms 21 can reach the detection area of ​​the corresponding photoelectric switch. Therefore, Figure 10 In each of the three circular patterns in columns 1-8, one pattern must be lit. Conversely, if none of the three patterns in any column 1-8 are lit, it indicates that the key's upper tooth groove is not properly machined, causing the rocker arm 21 to fail to reach the detection area of ​​the photoelectric switch. In this case, the system will stop the subsequent assembly work.

[0057] Finally, it should be emphasized that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A key slot recognition device, comprising a linkage structure and a detection unit for detecting the linkage structure; Its features are: The key slot recognition device is equipped with a key insertion hole; At least two of the linkage structures are arranged sequentially along the insertion direction of the keyhole; The linkage structure includes a linkage part and a detection part. The linkage part is located at the keyhole. The linkage part can be driven by a key inserted into the keyhole and rotated, and the detection part can be moved to the detection area of ​​the detection unit. The linkage can rotate around the keyhole; The linkage structure includes a swing arm, with the linkage part and the detected part located at the two ends of the extension of the swing arm, and the swing arm can swing around the keyhole; The multiple swing rods include a straight swing rod component arranged sequentially along the insertion direction and multiple bent swing rod components. The bent swing rod component includes a first extension section, a transverse extension section, and a second extension section that are sequentially bent at right angles and connected from the linkage part to the detection part. The following design principles apply to the multiple pendulum rods: Based on a single, straight pendulum member, in the insertion direction, among multiple bent pendulum members arranged on the same side of the straight pendulum member: The closer the bend of the swing rod is to a straight line, the longer the first extension, the shorter the lateral extension, and the shorter the second extension. The further away from the straight line the bend of the pendulum member, the shorter the first extension, the longer the lateral extension, and the longer the second extension.

2. The key slot recognition device according to claim 1, characterized in that: The linkage structure includes a reset mechanism, and the key slot recognition device includes a fixing part; The reset mechanism includes an elastic element, which is disposed between the fixed part and the swing arm.

3. The key slot recognition device according to claim 2, characterized in that: The linkage structure includes a reset mechanism, and the key slot recognition device includes a fixing part; The reset mechanism includes a flexible traction component and a counterweight component. The counterweight component and the swing arm component are respectively tractioned at both ends of the extension of the flexible traction component. The middle part of the extension of the flexible traction component is supported on the fixed part. The counterweight component is suspended by the flexible traction component.

4. The key slot recognition device according to claim 1, characterized in that: The linkage structure includes an active component and a passive component. The linkage part is disposed on the active component, and the detected part is disposed on the passive component. When the active component rotates, the passive component is driven by the active component to translate or rotate linearly.

5. The key slot recognition device according to claim 4, characterized in that: Tooth surface transmission occurs between the driving member and the driven member.

6. The key slot recognition device according to any one of claims 1 to 5, characterized in that: The key slot identification device includes a rotating connecting seat, a pin, and a fixing piece; The rotating connector is provided with multiple slots arranged at intervals along the insertion direction, and a baffle is formed between adjacent slots. The rotating connector is also provided with a pin hole and a second insertion hole that penetrate through the multiple baffles along the insertion direction. The fixing piece is provided with a through hole and an installation notch opening at the outer peripheral edge of the fixing piece. The multiple fixing pieces are respectively installed into the multiple slots. The pin passes through the multiple through holes and the multiple pin holes arranged in an alternating manner. The linkage is rotatably installed into the mounting notch.

7. The key slot recognition device according to any one of claims 1 to 5, characterized in that: The number of detection units corresponding to the linkage structure is at least two, and the plurality of detection units corresponding to the linkage structure are spaced apart along the moving direction of the detected part of the linkage structure.

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