A lifting structure of a two-wire door machine

Abstract

The present invention relates to the field of intelligent access control technology. The present invention discloses a lifting structure of a two-wire door machine, comprising an outer shell cover; a door machine body is arranged on the outer shell cover; a lifting mechanism capable of driving the door machine body to move up and down is installed on the outer shell cover, and symmetrically arranged slide rails are arranged inside the outer shell cover, and the slide rails are made of conductive material; an insulating sheet is arranged between the slide rails and the outer shell cover; and two groups of L-shaped conductive brushes are arranged on the door machine body. The present invention adopts a reliable lifting mechanism solution and designs a transmission line structure that meets the requirements of high-speed PLC signals. The structure can supply power to the door machine during lifting and perform signal communication without the need for additional external wiring. This structure can not only solve the problems of entanglement and easy dragging caused by the use of additional external wiring, but also meet the signal integrity requirements such as impedance of high-speed PLC differential signals, as well as electromagnetic compatibility requirements.

Description

Technical Field

[0001] The invention relates to the technical field of intelligent access control, in particular to a lifting structure of a two-wire door machine. Background Art

[0002] The building intercom system usually consists of a door phone, indoor extensions, and management machines, which communicate with each other. The door phone is usually installed at the entrance of a community or building. As a public device, it is used for visitors, residents, and property management centers to conduct intercom calls, access control, etc.

[0003] After checking the public (announcement) number; CN216852149U discloses a building visual intercom device, and this technology discloses "including a mounting shell for installing a lifting protection component, a lifting protection component for adjusting the height of the intercom, and the lifting protection component includes a sliding groove, a protection shell, a driving motor, a moving rope, an active wheel, a passive wheel and a limiting block and other technical solutions, which has the technical effects of realizing stable protection of the intercom through the lifting protection component, and moving the height of the intercom according to the height of the user in combination with the moving rope and the limiting block to avoid the inappropriate height of the intercom and the like".

[0004] After checking the publication (announcement) number; CN114463802A discloses a face recognition device, method, storage medium and electronic equipment. This technology discloses "including a lifting unit, a base unit; the upper end of the lifting unit is rigidly connected to the face recognition terminal, and the lower end is fixedly connected to the base unit. The lifting unit is lifted and adjusted according to the control signal of the face recognition terminal. The lifting adjustment device has the technical effects of simple structure, good stability, high height adjustment accuracy, and easy to carry and install, etc., under the premise of realizing the automatic lifting and adjustment function. ";

[0005] When the above design is in use, it can only provide a single lifting function solution, but does not provide power and signal transmission path for the terminal equipment in the lifting process. This leads to the need for additional external connecting wires and lifting mechanisms to lift the door machine to achieve people at different heights. However, the lifting door machine is in the process of moving up and down, and the external wires must be very long to meet the lifting and activity space requirements of the door machine. In addition, long external connecting wires have many problems, such as entanglement, easy to be damaged by dragging, and not beautiful. At the same time, long external connecting wires are also prone to electrical performance problems such as signal quality degradation and excessive electromagnetic radiation. Therefore, we propose a lifting structure for a two-wire door machine to solve the above problems. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides a lifting structure for a two-wire door phone, which solves the problem of using a lifting mechanism to lift the door phone and realize people of different heights. However, the lifting door phone is in the process of moving up and down, and the external connection line must be very long to meet the lifting and activity space requirements of the door phone. In addition, the long external connection line has many problems, such as entanglement, easy to be damaged by dragging, and unsightly. At the same time, the long external connection line is also prone to electrical performance problems such as signal quality degradation and excessive electromagnetic radiation.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: A lifting structure of a two-wire door machine, including a housing cover;

[0008] The outer shell is provided with a door machine body;

[0009] The outer shell is provided with a lifting mechanism which can drive the door machine body to move up and down;

[0010] The interior of the outer shell is provided with symmetrically arranged slide rails, and the slide rails are made of conductive material;

[0011] An insulating sheet is provided between the slide rail and the outer shell cover;

[0012] Two groups of L-shaped conductive brushes are provided on the door station body;

[0013] One end of the two groups of L-shaped conductive brushes is connected to the high-speed PLC module inside the door machine body, and the other ends of the two L-shaped conductive brushes are respectively in contact with and conductive with the two groups of slide rails. The high-speed PLC module of the door machine body achieves electrical conduction by sliding the two L-shaped conductive brushes on the two groups of slide rails.

[0014] Preferably, the lifting mechanism comprises a screw rod arranged inside the outer shell, a driving motor fixedly mounted on the outer shell to drive the screw rod to rotate, and a nut pair threadedly connected to the surface of the screw rod;

[0015] The nut pair is connected to the door machine body.

[0016] Preferably, the output end of the driving motor is fixedly connected to the screw rod, a plurality of sets of screws are arranged on the nut pair, threaded holes matching the screws are opened on the surface of the door machine body, and the screws are screwed into the threaded holes opened on the door machine body for connecting and locking the nut pair and the door machine body.

[0017] Preferably, a lifting groove is provided on one side of the outer shell cover, and a local position of the nut pair can slide in the lifting groove provided in the outer shell cover, and the outer portion of the nut pair fits with the inner wall of the outer shell cover.

[0018] Preferably, a through hole is opened on one side of the door machine body, and the two groups of L-shaped conductive brushes and the door machine body are slidably connected through the through hole. The two groups of L-shaped conductive brushes are located inside the door machine body and are fixed with an insulating sleeve. A spring is provided on the outside of the insulating sleeve, and the two ends of the spring are fixedly connected to the door machine body and the insulating sleeve respectively, and the spring is in a compressed state.

[0019] Preferably, there is a gap between the two groups of L-shaped conductive brushes and they are designed to be insulated.

[0020] Preferably, both sides of the insulating sheet are covered with adhesive layers, the adhesive layers are applied on both sides of the insulating sheet, the insulating sheet is fixed to the inner wall of the outer shell cover through the adhesive layer on one side, and the adhesive layer on the other side of the insulating sheet is fixedly connected to the slide rail.

[0021] Beneficial Effects

[0022] The present invention provides a lifting structure of a two-wire door machine. Compared with the prior art, it has the following advantages:

[0023] Beneficial effects:

[0024] The lifting structure of the two-wire door machine adopts a reliable lifting mechanism solution through this operation, and at the same time designs a transmission line structure that meets the requirements of high-speed PLC signals. It can power the door machine during lifting and perform signal communication without the need for additional external wiring. This structure can not only solve the problems of entanglement and easy dragging caused by the use of additional external wiring, but also meet the signal integrity requirements such as the impedance of the high-speed PLC differential signal, as well as the electromagnetic compatibility requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a structural schematic diagram of the nut pair and the screw rod and other connecting parts of the present invention;

[0027] Figure 3 It is a schematic diagram of the structure of the outer shell cover and the L-shaped conductive brush and other connecting parts of the present invention;

[0028] Figure 4 It is a schematic diagram of the structure of connecting parts such as a slide rail and an insulating sheet of the present invention;

[0029] Figure 5 It is a schematic diagram of the structure of the connecting parts such as the spring and the L-shaped conductive brush of the present invention;

[0030] Figure 6 This is an illustration of the calculation of this structure by the SI9000 impedance software of the present invention.

[0031] In the figure: 101, outer shell cover; 102, door machine body; 103, L-shaped conductive brush; 104, nut pair; 105, lead screw; 106, screw; 107, slide rail; 108, insulating sheet; 109, lifting slot; 110, spring. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] like Figure 1-5 As shown:

[0034] A lifting structure of a two-wire door machine includes a housing cover 101, the housing cover 101 is made of metal material and is grounded;

[0035] The outer shell 101 is provided with a door machine body 102;

[0036] The outer shell 101 is provided with a lifting mechanism that can drive the door machine body 102 to move up and down;

[0037] The lifting mechanism includes a screw rod 105 disposed inside the outer shell 101, a driving motor fixedly mounted on the outer shell 101 to drive the screw rod 105 to rotate, and a nut pair 104 threadedly connected to the surface of the screw rod 105;

[0038] The nut pair 104 is connected to the door machine body 102, the output end of the driving motor is fixedly connected to the screw rod 105, and a plurality of sets of screws 106 are arranged on the nut pair 104. The surface of the door machine body 102 is provided with threaded holes adapted to the screws 106. The screws 106 are screwed into the threaded holes provided in the door machine body 102, and are used for connecting and locking the nut pair 104 and the door machine body 102. A lifting groove 109 is provided on one side of the outer shell cover 101, and a part of the nut pair 104 can slide in the lifting groove 109 provided in the outer shell cover 101, and the outer part of the nut pair 104 is in contact with the inner wall of the outer shell cover 101;

[0039] The outer shell 101 is provided with symmetrically arranged slide rails 107, which are made of conductive material and can be connected to an external power supply system or control system by circuit. The two sets of slide rails 107 have the same size, length and material, and are symmetrically distributed as good conductors, and the conductive material can be copper.

[0040] An insulating sheet 108 is provided between the slide rail 107 and the outer shell cover 101;

[0041] Two sets of L-shaped conductive brushes 103 are provided on the door machine body 102;

[0042] One end of the two groups of L-shaped conductive brushes 103 is connected to the high-speed PLC module inside the door machine body 102, and the other ends of the two L-shaped conductive brushes 103 are respectively in contact with and conductive with the two groups of slide rails 107. The high-speed PLC module of the door machine body 102 achieves electrical conduction by sliding the two L-shaped conductive brushes 103 on the two groups of slide rails 107.

[0043] In this embodiment: the lifting structure of the two-wire door machine, when in use, when the door machine body 102 is lifted and lowered according to people of different heights, the drive motor (not shown in the figure) is started to drive the screw rod 105 to rotate. Since the screw rod 105 and the nut pair 104 are threadedly connected, the screw rod 105 has threads, and the nut pair 104 also has corresponding threads inside, forming an intersection similar to an inclined surface. When the screw rod 105 rotates, the nut pair 104 is driven to move up and down. Since the nut pair 104 is connected to the door machine body 102 through the screw 106, when the nut pair 104 moves, the door machine body 102 is driven to move synchronously up and down;

[0044] During this process, two groups of L-shaped conductive brushes 103 extend from the upper part of the rear shell of the door machine body 102, which are used to transmit two signals of the differential PLC signal. One end of the two L-shaped conductive brushes 103 is connected to the high-speed PLC module inside the door machine body 102, and the other ends of the two L-shaped conductive brushes 103 are respectively in contact with and conductive with the two groups of slide rails 107 inside the outer shell 101, so that the lifting mechanism drives the door machine body 102 to move, and further drives the L-shaped conductive brushes 103 to move synchronously, that is, the high-speed PLC module of the door machine body 102 slides on the two groups of slide rails 107 through the two L-shaped conductive brushes 103 to achieve electrical conduction, so that the high-speed PLC communication with other devices can still be carried out uninterruptedly through the two groups of slide rails 107 when the door machine body 102 is lifted or lowered;

[0045] Through this operation, a reliable lifting mechanism solution is adopted, and a transmission line structure that meets the requirements of high-speed PLC signals is designed. It can power the door machine during lifting and perform signal communication without the need for additional external wiring. This structure can not only solve the problems of entanglement and easy dragging caused by the use of additional external wiring, but also meet the signal integrity requirements such as impedance of high-speed PLC differential signals, as well as electromagnetic compatibility requirements;

[0046] An insulating sheet 108 is provided on one side of the slide rail 107, and the insulating sheet 108 can play an electrical insulation role to prevent the L-shaped conductive brush 103 and the outer shell cover 101 from short-circuiting;

[0047] The outer shell cover 101 is grounded and can play the role of electromagnetic shielding. The high-speed PLC differential signal transmitted on the slide rail 107 has electromagnetic radiation. The grounded outer shell cover 101 can shield the electromagnetic radiation to avoid possible electromagnetic radiation exceeding the standard. At the same time, the outer shell cover 101 also serves as the impedance control reference ground plane of the slide rail 107. The carefully designed slide rail 107, insulating sheet 108, and outer shell cover 101 together constitute a transmission line structure that can transmit high-speed PLC differential signals to ensure the signal integrity and electromagnetic compatibility of the two-wire high-speed differential signal.

[0048] It should be noted that:

[0049] As attached Figure 6 As shown, in order to meet the transmission line impedance requirements of high-speed PLC differential signals, the transmission line structure needs to be carefully calculated and designed. The main components that affect the transmission line impedance include the cross-sectional size spacing of the two slide rails 107 and the thickness of the insulating sheet 108, the outer shell 101, as shown in the attached Figure 6 As shown, the mainstream professional impedance design Polar Si9000 is used to calculate the transmission line structure impedance. The cross section of the slide rail 107 in this embodiment is rectangular. The two slide rails 107 and the outer shell 101 are bonded with an insulating sheet 108 with a thickness of 1.6 mm. The corresponding impedance model of Polar Si9000 is used for calculation, and the corresponding size parameters are designed as follows:

[0050] Attached Figure 6 W1 and W2 in the impedance model refer to the upper surface width and the lower surface width of the slide rail 107 respectively. The slide rail 107 of this embodiment is rectangular, and the upper and lower surface widths are both 4 mm. S1 refers to the air gap between the two slide rails 107, which is designed to be 6 mm. T1 is the thickness of the slide rail 107, which is 1 mm. H1 is the thickness of the insulating sheet 108 between the slide rail 107 and the outer shell cover 101, which is 1.6 mm. Er1 is the dielectric constant of the insulating sheet 108 material, which is related to the insulating layer material. This embodiment uses an insulating material with a dielectric constant of 2. The transmission line differential impedance value of this structure calculated by SI9000 impedance design software is 101.391 ohms, which meets the impedance requirement of the high-speed differential target impedance of 100 ohms +-10% required by this embodiment.

[0051] Going further;

[0052] In an optional embodiment, a through hole is opened on one side of the door machine body 102, and two groups of L-shaped conductive brushes 103 and the door machine body 102 are slidably connected through the through hole. The two groups of L-shaped conductive brushes 103 are located inside the door machine body 102 and are fixed with an insulating sleeve. A spring 110 is provided on the outside of the insulating sleeve. Both ends of the spring 110 are fixedly connected to the door machine body 102 and the insulating sleeve respectively. The spring 110 is in a compressed state. There is a gap between the two groups of L-shaped conductive brushes 103 and they are insulated.

[0053] In this embodiment: one end of the door machine body 102 is connected to the internal PLC module of the door machine body 102, and a spring 110 is provided on the internal structure of the door machine body 102, and the spring 110 is in a compressed state, which will pull the two groups of L-shaped conductive brushes 103 to fit tightly with the side of the slide rail 107, thereby preventing the L-shaped conductive brushes 103 from being separated from the slide rail 107 and improving the stability of the connection.

[0054] Going further;

[0055] In an optional embodiment, both sides of the insulating sheet 108 are covered with adhesive layers, and the adhesive layers are applied to both sides of the insulating sheet 108. The insulating sheet 108 is fixed to the inner wall of the outer shell cover 101 through the adhesive layer on one side, and the adhesive layer on the other side of the insulating sheet 108 is fixedly connected to the slide rail 107.

[0056] In the present embodiment: both sides of the insulating sheet 108 are covered with an adhesive layer, and the insulating sheet 108 is fixed to the inner wall of the outer shell cover 101 through the adhesive layer on one side, and at the same time, the adhesive layer on the other side of the insulating sheet 108 is fixedly connected to the slide rail 107. The adhesive layer facilitates the quick installation of the insulating sheet 108 and the slide rail 107, thereby improving the use effect of the device.

[0057] The working principle and use process of the present invention: When the lifting structure of the two-wire door machine is used, when the door machine body 102 is lifted and lowered according to people of different heights, the drive motor (not shown in the figure) is started to drive the screw rod 105 to rotate. Since the screw rod 105 and the nut pair 104 are threadedly connected, the screw rod 105 has threads, and the nut pair 104 also has corresponding threads inside, forming an intersection similar to an inclined surface. When the screw rod 105 rotates, it drives the nut pair 104 to move up and down. Since the nut pair 104 is connected to the door machine body 102 through the screw 106, when the nut pair 104 moves, it drives the door machine body 102 to move up and down synchronously; in this process, the door machine body 1 Two groups of L-shaped conductive brushes 103 extend from the upper part of the rear shell of 02, with a gap between the two L-shaped conductive brushes 103 and insulation, one end of the two L-shaped conductive brushes 103 is connected to the high-speed PLC module inside the door machine body 102, and the other ends of the two L-shaped conductive brushes 103 are respectively in contact with and conductive with the two groups of slide rails 107 inside the outer shell cover 101, so that the lifting mechanism drives the door machine body 102 to move while also driving the L-shaped conductive brushes 103 to move synchronously, that is, the high-speed PLC module of the door machine body 102 slides on the two groups of slide rails 107 through the two L-shaped conductive brushes 103 to achieve electrical conduction, so that high-speed PLC communication with other equipment can still be uninterrupted through the two groups of slide rails 107 during the lifting of the door machine body 102.

[0058] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

1. A lifting structure of a two-wire door machine, characterized in that: comprising an outer shell cover (101); The outer shell (101) is provided with a door machine body (102); The outer shell (101) is provided with a lifting mechanism capable of driving the door machine body (102) to move up and down; The outer shell (101) is provided with symmetrically arranged slide rails (107) inside, and the slide rails (107) are made of conductive material; An insulating sheet (108) is provided between the slide rail (107) and the outer shell cover (101); Two groups of L-shaped conductive brushes (103) are arranged on the door station body (102); One end of the two groups of L-shaped conductive brushes (103) is connected to the high-speed PLC module inside the door machine body (102), and the other ends of the two L-shaped conductive brushes (103) are respectively in contact with and conductive with the two groups of slide rails (107), and the high-speed PLC module of the door machine body (102) achieves electrical conduction by sliding the two L-shaped conductive brushes (103) on the two groups of slide rails (107).

2. The lifting structure of the two-wire door phone according to claim 1, characterized in that: The lifting mechanism comprises a screw rod (105) arranged inside the outer shell (101), a driving motor fixedly mounted on the outer shell (101) to drive the screw rod (105) to rotate, and a nut pair (104) threadedly connected to the surface of the screw rod (105); The nut pair (104) is connected to the door machine body (102).

3. The lifting structure of the two-wire door machine according to claim 2 is characterized in that: The output end of the driving motor is fixedly connected to the screw rod (105); a plurality of sets of screws (106) are arranged on the nut pair (104); threaded holes matching the screws (106) are provided on the surface of the door machine body (102); the screws (106) are screwed into the threaded holes provided on the door machine body (102) to connect and lock the nut pair (104) and the door machine body (102).

4. The lifting structure of the two-wire door phone according to claim 2 is characterized in that: A lifting groove (109) is provided on one side of the outer shell cover (101), and a part of the nut pair (104) can slide in the lifting groove (109) provided on the outer shell cover (101), and the outside of the nut pair (104) is in contact with the inner wall of the outer shell cover (101).

5. The lifting structure of the two-wire door phone according to claim 1, characterized in that: A through hole is provided on one side of the door machine body (102), and the two groups of L-shaped conductive brushes (103) and the door machine body (102) are slidably connected through the through hole. The two groups of L-shaped conductive brushes (103) are located inside the door machine body (102) and are fixed with an insulating sleeve. A spring (110) is provided outside the insulating sleeve. The two ends of the spring (110) are respectively fixedly connected to the door machine body (102) and the insulating sleeve. The spring (110) is in a compressed state.

6. The lifting structure of the two-wire door phone according to claim 5, characterized in that: There is a gap between the two groups of L-shaped conductive brushes (103) and they are designed to be insulated.

7. The lifting structure of the two-wire door phone according to claim 1, characterized in that: Both sides of the insulating sheet (108) are covered with adhesive layers, and the adhesive layers are applied to both sides of the insulating sheet (108). The insulating sheet (108) is fixed to the inner wall of the outer shell cover (101) through the adhesive layer on one side, and the adhesive layer on the other side of the insulating sheet (108) is fixedly connected to the slide rail (107).

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