Card swiping device for hotel door lock

Abstract

The application provides a card swiping device of a hotel door lock, which comprises a base, a limiting sheet, an induction module and a decorative sheet, wherein the base comprises a plate-shaped main body and a plurality of positioning beads fixed on the plate-shaped main body respectively; the plate-shaped main body comprises a pasting surface, a crimping surface, a through hole and a clamping part; each positioning bead comprises an elastic member and an extension head; the limiting sheet comprises a first annular main body and a clamping hook; the induction module comprises a printed circuit board, an induction coil, a wiring terminal and a plurality of luminous bodies, and the light-emitting surfaces of the plurality of luminous bodies are respectively directed to the outer periphery of the printed circuit board; the luminous ring comprises a second annular main body made of a light-transmitting material, and the second annular main body is formed with a central through hole and a frosted layer surrounding the outer periphery; and the decorative sheet comprises a sheet-shaped main body; the limiting sheet, the luminous ring, the induction module and the decorative sheet are fixed together to form a buckling block which can be buckled to the plate-shaped main body. The application can ensure the stable fixation of the card swiping device of the hotel door lock, and avoid the uneven light emission of the luminous ring caused by the fixing screw.

Description

Technical Field

[0001] This invention relates to the field of door locks, and more specifically, to a card swiping device for hotel door locks. Background Technology

[0002] The existing hotel door lock card reader devices mainly fall into the following two categories: One method involves using screws to fix the light ring to the door panel and then stacking a card-swiping coil (i.e., an induction coil) on top of the light ring. Since screws are needed to fix the light ring, they will block the light emitted by the LEDs inside the light ring, causing the light to dim at the location corresponding to the screws when the card-swiping device lights up. Another method is to use a magnet to attach the card reader coil to the mounting base. Although the card reader coil is not likely to be shaken off when the door is opened or closed, its easy detachability makes it easy for it to be taken away by someone, causing the product to malfunction. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a new card reader for hotel door locks, addressing the issues of uneven light emission in the above-mentioned card reader fixed with screws and the easy disassembly of the card reader fixed with magnetic attraction.

[0004] The technical solution of the present invention to solve the above-mentioned technical problems is to provide a card swiping device for hotel door locks, comprising: A base for fixing to the lock hole of a door panel includes a plate-shaped body and a plurality of positioning beads respectively fixed to the plate-shaped body; the plate-shaped body includes a mounting surface, a pressing surface and a through hole, and the edge of the through hole forms a snap-fit ​​portion; each positioning bead includes an elastic element and a telescopic head pushed by the elastic element, and when the elastic element is in a free state, the top end of the telescopic head protrudes from the pressing surface, and when the elastic element is in a maximum compressed state, the top end of the telescopic head is recessed into the pressing surface or flush with the pressing surface; The limiting piece includes a first annular body and a hook, wherein the hook is connected to the first annular body and protrudes from the back of the first annular body; The sensing module includes a printed circuit board, an induction coil, a terminal block, and multiple light emitters. The induction coil is located on the front side of the printed circuit board, and the terminal block and light emitters are located on the back side of the printed circuit board. The light-emitting surfaces of the multiple light emitters face the outer periphery of the printed circuit board. The light-emitting ring includes a second annular body made of light-transmitting material. The thickness of the second annular body is not less than the sum of the thickness of the printed circuit board and the size of the light-emitting body protruding from the back of the printed circuit board. The second annular body has a central through hole adapted to the sensing module and a frosted layer surrounding the outer periphery. Decorative sheet, including a sheet-like body made of non-transparent material; The limiting piece, the light-emitting ring, the sensing module, and the decorative piece are fixed together to form a fastening block. In the fastening block, the first annular body, the second annular body, and the sheet-like body are stacked in sequence. The sensing module is located in the central through hole of the second annular body, and the front of the printed circuit board faces the decorative piece. The light-emitting range of the multiple light-emitting bodies covers the entire outer periphery of the second annular body. The fastening block is assembled to the base by means that the back of the first annular body is in contact with the pressing surface of the sheet-like body, and the hook and the snap-fit ​​part are engaged. As a further improvement of the present invention, a groove is formed on the front side of the plate-shaped body of the base, and the pressing surface is formed by the bottom wall of the groove; the size of the first annular body is smaller than the size of the groove, and when the fastening block is assembled to the base, the first annular body is embedded in the groove.

[0005] As a further improvement of the present invention, the shape and size of the through hole are adapted to the shape and size of the lock hole, and the edge of the through hole has two locking portions spaced 180° apart; the limiting piece includes two hooks respectively connected to the first annular body and distributed at 180°.

[0006] As a further improvement of the present invention, each of the snap-fit ​​portions includes a clearance opening and a circumferential limiting strip, and the clearance opening is adjacent to the circumferential limiting strip; Each of the hooks includes a connecting arm and a locking plate. The connecting arm is vertically connected to the back of the first annular body, and the locking plate is connected to the end of the connecting arm and extends vertically outward from the first annular body. The width of the locking plate is less than the width of the clearance opening, and the thickness of the locking plate is less than the distance between the bottom surface of the circumferential limiting strip and the mounting surface of the plate-shaped body. The hook engages with the locking part by the locking plate passing through the clearance opening and rotating to the inside of the circumferential limiting strip.

[0007] As a further improvement of the present invention, the width of the circumferential limiting strip is greater than the width of the card plate.

[0008] As a further improvement of the present invention, notches are formed on both sides of each connecting arm on the first annular body, the connection between the connecting arm and the first annular body is recessed into the outer periphery of the first annular body, and the outer edge of the card plate is flush with the outer periphery of the first annular body.

[0009] As a further improvement of the present invention, the outer periphery of the plate-shaped body, the second annular body and the sheet-shaped body are all circular, and the plate-shaped body, the second annular body and the sheet-shaped body have the same outer diameter.

[0010] As a further improvement of the present invention, the plurality of light-emitting elements are evenly distributed on a circumference with the center of the printed circuit board as the center, and the wiring terminal is located inside the circumference where the plurality of light-emitting elements are located.

[0011] As a further improvement of the present invention, the back side of the printed circuit board has eight light-emitting elements, and the light-emitting range of each light-emitting element corresponds to one-eighth of the outer perimeter of the second annular body.

[0012] As a further improvement of the present invention, the pressing surface of the plate-shaped body has at least two countersunk holes located on both sides of the through hole, and positioning beads are fixed on both sides of each countersunk hole. The plate-shaped body is fixed to the door panel by screws passing through the countersunk holes in such a way that the mounting surface is attached to the door panel surface and the through hole is opposite to the lock hole on the door panel.

[0013] The present invention has the following beneficial effects: by fastening the fastening block with the light-emitting ring to the base fixed to the door panel, while ensuring stable fixation, it avoids uneven light emission of the light-emitting ring caused by the fixing screw. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a card-swiping device for a hotel door lock provided in an embodiment of the present invention.

[0015] Figure 2 This is a cross-sectional structural diagram of the card swiping device for a hotel door lock provided in an embodiment of the present invention.

[0016] Figure 3 This is an exploded structural diagram of the card reader for a hotel door lock provided in an embodiment of the present invention.

[0017] Figure 4 This is a schematic diagram of the sensing module in the card reader of the hotel door lock provided in an embodiment of the present invention.

[0018] Figure 5 This is a schematic diagram of the light-emitting ring in the card reader of the hotel door lock provided in an embodiment of the present invention.

[0019] Figure 6 This is a schematic diagram of the base in the card reader of the hotel door lock provided in an embodiment of the present invention.

[0020] Figure 7 This is a schematic diagram of the limiting piece in the card reader of the hotel door lock provided in an embodiment of the present invention.

[0021] Figure 8 This is a schematic diagram of the back of the card reader of the hotel door lock provided in an embodiment of the present invention. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0023] like Figures 1-3 The diagram shows a schematic of the card-swiping device for a hotel door lock according to the present invention. This card-swiping device can be installed at the keyhole of a hotel room door and electrically connected to the electronic lock of the hotel room door, thereby enabling card-swiping unlocking of the room door. The card-swiping device of this embodiment includes a base 10, a limiting piece 20, a light-emitting ring 30, a sensing module 40, and a decorative piece 50. The base 10 is fixed to the keyhole of the hotel room door panel. The limiting piece 20, the light-emitting ring 30, the sensing module 40, and the decorative piece 50 are fixed together to form a snap-fit ​​block, and the snap-fit ​​block is assembled to the base 10 in a snap-fit ​​manner.

[0024] Combination Figure 3 , Figure 6 As shown, the base 10 includes a plate-shaped body 11 and a plurality of positioning beads 12 (e.g., Figure 6 (As shown in the four diagrams). The aforementioned plate-shaped body 11 can be made of rigid materials such as metal or plastic. It includes a mounting surface, a pressing surface 111, and a through hole 112. The mounting surface and the pressing surface 111 are arranged facing away from each other on the plate-shaped body 11. When the base 10 is fixed to the door panel, the mounting surface of the plate-shaped body 11 is in contact with the surface of the door panel. The through hole 112 extends from the pressing surface 111 to the mounting surface, and the edge of the through hole 112 forms a snap-fit ​​portion. A plurality of positioning beads 12 are respectively fixed to the plate-shaped body 11. Each positioning bead 12 includes an elastic element (such as a compression spring or a spring sheet) and a telescopic head pushed by the elastic element. When the elastic element is in a free state (i.e., the telescopic head is not pushed), the top end of the telescopic head protrudes from the pressing surface 111; when the elastic element is in a maximum compressed state, the top end of the telescopic head is recessed into the pressing surface 111 or flush with the pressing surface 111.

[0025] Specifically, the positioning bead 12 may further include a cylindrical outer shell, with one end having an opening and the other end being closed. An elastic element and a telescopic head are respectively installed inside the cylindrical outer shell, with both ends of the elastic element abutting against the telescopic head and the inner wall of the cylindrical outer shell (e.g., the inner wall opposite the opening), respectively. The elastic element pushes the telescopic head so that its tip protrudes outside the opening of the cylindrical outer shell. When the tip of the telescopic head is pushed by an external force, its head can retract into the opening of the cylindrical outer shell, simultaneously compressing the elastic element. Specifically, the elastic element can be a compression spring, and the elastic head can be a ball bearing. The positioning bead 12 can be fixed to the plate-shaped body 11 by a tight fit.

[0026] Combination Figure 7 As shown, the aforementioned limiting piece 20 includes a first annular body 21 and a hook. The first annular body 21 is generally thin and has a through hole 211. The hook is connected to the first annular body 21 and protrudes from the back of the first annular body 21. In practical applications, the first annular body 21 and the hook can be an integral structure; for example, the first annular body 21 and the hook can be formed by stamping and bending the same metal sheet.

[0027] Combination Figure 2 , Figure 4 As shown, the sensing module 40 includes a printed circuit board 41, an induction coil (not shown), a terminal block 43, and multiple light emitters 42. The induction coil is located on the front side of the printed circuit board 41, while the terminal block 43 and the light emitters 42 are located on the back side of the printed circuit board 41. The light-emitting surfaces of the multiple light emitters 42 face the outer periphery of the printed circuit board 41, meaning the light emitted by the light emitters 42 faces away from the center of the printed circuit board 41. Those skilled in the art will understand that in the above-mentioned sensing module 40, the induction coil, the light emitters 42, and the terminal block 43 are all electrically connected to the printed circuit board 41. The terminal block 43 can be electrically connected to the control board of the electronic lock via a cable, thereby transmitting the induced current generated by the induction coil when swiping the card to the control board of the electronic lock, and obtaining power and control signals from the control board of the electronic lock to control the light emitters 42 to emit light. In particular, the light emitters 42 can be light-emitting diodes (LEDs), and each light emitter 42 can include R, G, and B three-color LEDs, so that each light emitter 42 can generate colored light under the control of the electronic lock's control board.

[0028] Combination Figure 2 , Figure 5 As shown, the light-emitting ring 30 includes a second annular body 31, which is made of a light-transmitting material (such as transparent polycarbonate). The thickness of the second annular body 31 is not less than the sum of the thickness of the printed circuit board 41 and the size of the light-emitting body 42 protruding from the back of the printed circuit board 41. The second annular body 31 has a central through-hole 311 and a frosted layer 312. The shape and size of the central through-hole 311 are adapted to the shape and size of the sensing module 40. For example, when the printed circuit board 41 of the sensing module 40 is circular, the central through-hole 311 is also circular, and the diameter of the central through-hole 311 is slightly larger than the outer diameter of the printed circuit board 41. The frosted layer 312 is located on the outer peripheral surface of the second annular body 31 and surrounds the second annular body 31. In this way, the sensing module 40 can be embedded as a whole into the central through hole 311 of the second annular body 31. Since the thickness of the second annular body 31 is not less than the sum of the dimensions of the printed circuit board 41 and the light-emitting body 42 protruding from the back of the printed circuit board 41, when the front of the printed circuit board 41 is level with the end face of the second annular body 31, the light-emitting body 42 will not protrude from the other end face of the second annular body 31. The light emitted by it can penetrate through the inner ring surface of the second annular body 31 and illuminate the frosted layer 312. The light is scattered in the frosted layer 312, so that the frosted layer 312 presents a light-emitting effect.

[0029] The decorative piece 50 includes a sheet-like body 51, which is made of a non-transparent material, such as polycarbonate doped with non-transparent particles. Furthermore, the decorative piece 50 may have a card-swiping icon or similar feature to indicate when a user should swipe their card.

[0030] Combination Figure 2 , Figure 3 As shown, the aforementioned limiting piece 20, light-emitting ring 30, sensing module 40, and decorative piece 50 are fixed together to form a fastening block. For example, the limiting piece 20, light-emitting ring 30, sensing module 40, and decorative piece 50 can be fixed together by means of adhesive. In this fastening block, the first annular body 21, the second annular body 31, and the sheet-like body 51 are stacked sequentially. The sensing module 40 is located in the central through hole 311 of the second annular body 31, and the front of the printed circuit board 41 faces the decorative piece 50. The light-emitting range of the multiple light-emitting bodies 42 covers the entire outer periphery of the second annular body 31. The snap-fit ​​block is assembled to the base 10, and the back of the first annular body 21 is in contact with the pressing surface 111 of the plate-shaped body 11, and the hook and the snap-fit ​​part are engaged. At the same time, the limiting piece 20 in the snap-fit ​​block pushes the positioning bead 12 that protrudes from the pressing surface 111. The positioning bead 12 reacts to the limiting piece 20 under the action of the elastic element, and cooperates with the snap-fit ​​structure to make the snap-fit ​​block and the base 10 stably fixed together. When assembling the card reader device for the aforementioned hotel door lock, first fix the base to the lock hole of the door panel, then use a cable to electrically connect the control board of the electronic lock to the wiring terminals of the induction module 40, and then assemble the latching block onto the base 10. Since no screws pass through the light-emitting ring 30, the light ring around the outer periphery of the light-emitting ring 30 can be ensured to be continuous and uniform. At the same time, since the latching block and the base 10 are connected by a snap-fit ​​method, and the pressing surface 111 of the base 10 has positioning beads 12 that push the latching block, the connection between the latching block and the base 10 can be ensured to be stable and fixed and not easy to disassemble.

[0031] Combination Figure 2 , Figure 6 As shown, in one embodiment of the present invention, a groove is formed on the front side of the plate-shaped body 11 of the base 10, and the pressing surface 111 is formed by the bottom wall of the groove; correspondingly, the size of the first annular body 21 of the limiting piece 20 is smaller than the size of the groove, that is, the radial dimension of the first annular body 21 is smaller than the radial dimension of the groove, and the thickness of the first annular body 21 is smaller than the depth of the groove, and when the fastening block is assembled to the base 10, the first annular body 21 is embedded in the groove.

[0032] The above structure helps to reduce the overall thickness of the card reader of the hotel door lock. In particular, the radial dimension of the first annular body 21 can be slightly smaller than the radial dimension of the groove, and the thickness of the first annular body 21 is slightly smaller than the depth of the groove, so that the first annular body 21 can be just embedded into the groove. This allows the first annular body 21 to limit the locking block and prevent the locking block from sliding in the radial direction after it is engaged with the base 10.

[0033] In one embodiment of the present invention, the shape and size of the through hole 112 on the plate-shaped body 11 of the base 10 are adapted to the shape and size of the lock hole on the door panel. For example, the through hole 112 can be elliptical. In this way, when the base 10 is fixed to the door panel, the lock hole can be exposed through the through hole 112. In an emergency (i.e., when the card cannot be swiped to open the door), the latching block can be removed and the door can be opened with a mechanical key. In order to ensure the stability of the fixation between the latching block and the base 10, the edge of the through hole 112 has two locking parts spaced 180° apart. Correspondingly, the limiting piece 20 includes two hooks respectively connected to the first annular body 21 and distributed at 180°, that is, there are two connection points distributed at 180° between the latching block and the base 10.

[0034] like Figure 6 As shown, in one embodiment of the present invention, each snap-fit ​​portion includes a clearance opening 113 and a circumferential limiting strip 114, that is, the radial dimension of the through hole 112 at the clearance opening 113 is greater than its radial dimension at the circumferential limiting strip 114, and the clearance opening 113 is adjacent to the circumferential limiting strip 114.

[0035] Accordingly, such as Figure 7 As shown, each hook includes a connecting arm 221 and a locking plate 222. The connecting arm 221 is vertically connected to the back of the first annular body 21, and the locking plate 222 is connected to the end of the connecting arm 221 and extends vertically outward from the first annular body 21. The width of the locking plate 222 (i.e., the circumferential dimension along the first annular body 21) is smaller than the width of the clearance opening 113 (i.e., the circumferential dimension along the plate-shaped body 11), and the thickness of the locking plate 222 is smaller than the distance between the bottom surface of the circumferential limiting strip 114 (i.e., the surface facing away from the pressing surface 111) and the mounting surface of the plate-shaped body 11. The latch engages with the locking part by having the locking plate 222 pass through the clearance opening 113 and rotate to the inside of the circumferential limiting strip 114 (i.e., the side away from the clearance opening 113). That is, when the latching block is assembled to the base 10, first press the latching block to insert the locking plate 222 into the clearance opening 113, then rotate the latching block to insert the locking plate 222 between the circumferential limiting strip 114 and the door panel, completing the assembly. Figure 8 As shown.

[0036] In one embodiment of the present invention, the width of the circumferential limiting strip 114 (i.e., the circumferential dimension along the plate-shaped body 11) is greater than the width of the card plate 222. Thus, by positioning the card plate 222 at different positions on the circumferential limiting strip 114, the fastening block can be stably fixed at different circumferential positions relative to the base 10. Compared to traditional card-swiping devices that have only a small or no adjustment angle, this structure allows installers to adjust the position of the fastening block by rotating it when fixing the base 10 with mounting screws, even if the base is not level. This ensures that the card-swiping icon on the decorative piece is not skewed, maintaining an aesthetically pleasing appearance.

[0037] In one embodiment of the present invention, each connecting arm 221 on the first annular body 21 has a notch 212 formed on both sides, and the connection between the connecting arm 221 and the first annular body 21 is recessed into the outer periphery of the first annular body 21. The outer edge of the locking plate 222 is flush with the outer periphery of the first annular body 21. Due to the presence of the notch 212, the hook has a certain elasticity, making it easier to install the fastening block onto the base 10. At the same time, the fact that the outer edge of the locking plate 222 is flush with the outer periphery of the first annular body 21 ensures that the fastening block can rotate more smoothly relative to the base 10.

[0038] In one embodiment of the present invention, the outer peripheries of the plate-shaped body 11, the second annular body 31, and the sheet-shaped body 51 are all circular, and the plate-shaped body 11, the second annular body 31, and the sheet-shaped body 51 have the same outer diameter. This structure makes the card reader of the hotel door lock more aesthetically pleasing, while maintaining the overall appearance even when the latching block rotates relative to the base 10.

[0039] like Figure 4 As shown, in one embodiment of the present invention, a plurality of light-emitting elements 42 of the sensing module 40 are evenly distributed on a circumference centered on the center of the printed circuit board 41, while the wiring terminal 43 is located inside the circumference where the plurality of light-emitting elements 42 are located. The above structure can prevent the light emitted by the light-emitting elements 42 from being blocked by the wiring terminal 43, ensuring that the frosted layer of the second annular body 31 can emit light evenly.

[0040] Specifically, the back of the printed circuit board 41 has eight light-emitting elements 42, and the light-emitting range of each light-emitting element 42 corresponds to one-eighth of the outer perimeter of the second annular body 31. The above structure can prevent the light generated by the light-emitting elements 42 from overlapping on the frosted layer of the second annular body 31, thus avoiding uneven light emission.

[0041] like Figure 8As shown, in one embodiment of the present invention, the base 10 can be fixed to the door panel in the following manner: At least two countersunk holes 115 are located on both sides of the through hole 112 on the pressing surface 111 of the plate-shaped body 11. Positioning beads 12 are fixed on both sides of each countersunk hole 115, meaning at least four positioning beads 12 are fixed on the plate-shaped body 11. The plate-shaped body 11 is fixed to the door panel with its mounting surface 116 attached to the door panel surface and the through hole 112 facing the lock hole on the door panel, secured to the door panel by screws passing through the countersunk holes 115. Because the plate-shaped body 11 is fixed by locking, and the base 10 is secured to the door panel by the push of the fastening block by at least four positioning beads 12, the base 10 is firmly fixed to the door panel, while ensuring a stable connection between the fastening block and the base 10.

[0042] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A card reader for a hotel door lock, characterized in that, include: A base for fixing to the lock hole of a door panel includes a plate-shaped body and a plurality of positioning beads respectively fixed to the plate-shaped body; the plate-shaped body includes a mounting surface, a pressing surface and a through hole, and the edge of the through hole forms a snap-fit ​​portion; each positioning bead includes an elastic element and a telescopic head pushed by the elastic element, and when the elastic element is in a free state, the top end of the telescopic head protrudes from the pressing surface, and when the elastic element is in a maximum compressed state, the top end of the telescopic head is recessed into the pressing surface or flush with the pressing surface; The limiting piece includes a first annular body and a hook, wherein the hook is connected to the first annular body and protrudes from the back of the first annular body; The sensing module includes a printed circuit board, an induction coil, a terminal block, and multiple light emitters. The induction coil is located on the front side of the printed circuit board, and the terminal block and light emitters are located on the back side of the printed circuit board. The light-emitting surfaces of the multiple light emitters face the outer periphery of the printed circuit board. The light-emitting ring includes a second annular body made of light-transmitting material. The thickness of the second annular body is not less than the sum of the thickness of the printed circuit board and the size of the light-emitting body protruding from the back of the printed circuit board. The second annular body has a central through hole adapted to the sensing module and a frosted layer surrounding the outer periphery. Decorative sheet, including a sheet-like body made of non-transparent material; The limiting piece, the light-emitting ring, the sensing module, and the decorative piece are fixed together to form a fastening block. In the fastening block, the first annular body, the second annular body, and the sheet-like body are stacked in sequence. The sensing module is located in the central through hole of the second annular body, and the front of the printed circuit board faces the decorative piece. The light-emitting range of the multiple light-emitting bodies covers the entire outer periphery of the second annular body. The fastening block is assembled to the base by means that the back of the first annular body is in contact with the pressing surface of the sheet-like body, and the hook and the snap-fit ​​part are engaged.

2. The card reader for the hotel door lock according to claim 1, characterized in that, The plate-shaped body of the base has a groove formed on its front side, and the pressing surface is formed by the bottom wall of the groove; the size of the first annular body is smaller than the size of the groove, and when the fastening block is assembled to the base, the first annular body is embedded in the groove.

3. The card reader for the hotel door lock according to claim 1, characterized in that, The shape and size of the through hole are adapted to the shape and size of the lock hole, and the edge of the through hole has two locking portions spaced 180° apart; the limiting piece includes two hooks respectively connected to the first annular body and distributed at 180°.

4. The card reader for the hotel door lock according to claim 3, characterized in that, Each of the aforementioned snap-fit ​​portions includes a clearance opening and a circumferential limiting strip, and the clearance opening is adjacent to the circumferential limiting strip; Each of the hooks includes a connecting arm and a locking plate. The connecting arm is vertically connected to the back of the first annular body, and the locking plate is connected to the end of the connecting arm and extends vertically outward from the first annular body. The width of the locking plate is less than the width of the clearance opening, and the thickness of the locking plate is less than the distance between the bottom surface of the circumferential limiting strip and the mounting surface of the plate-shaped body. The hook engages with the locking part by the locking plate passing through the clearance opening and rotating to the inside of the circumferential limiting strip.

5. The card reader for the hotel door lock according to claim 4, characterized in that, The width of the circumferential limiting strip is greater than the width of the card plate.

6. The card reader for the hotel door lock according to claim 4, characterized in that, Each connecting arm on the first annular body has notches on both sides, the connection between the connecting arm and the first annular body is recessed into the outer periphery of the first annular body, and the outer edge of the card plate is flush with the outer periphery of the first annular body.

7. The card reader for the hotel door lock according to claim 1, characterized in that, The outer periphery of the plate-shaped main body, the second annular main body, and the sheet-shaped main body are all circular, and the plate-shaped main body, the second annular main body, and the sheet-shaped main body have the same outer diameter.

8. The card reader for the hotel door lock according to claim 7, characterized in that, Multiple light-emitting elements are evenly distributed on a circumference centered on the center of the printed circuit board, and the wiring terminal is located inside the circumference where the multiple light-emitting elements are located.

9. The card reader for the hotel door lock according to claim 8, characterized in that, The back of the printed circuit board has eight light emitters, and the light emission range of each light emitter corresponds to one-eighth of the outer perimeter of the second annular body.

10. The card reader for the hotel door lock according to claim 1, characterized in that, The plate-shaped main body has at least two countersunk holes located on both sides of the through hole on its pressing surface. Each countersunk hole has a positioning bead fixed on both sides. The plate-shaped main body is fixed to the door panel by screws passing through the countersunk holes, with the mounting surface attached to the door panel surface and the through hole facing the lock hole on the door panel.

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