Electromagnetic shielding door
By integrating electromagnetic shielding performance monitor and multi-layer thermal insulation structure in electromagnetic shielding doors, the problem of insufficient thermal insulation performance of traditional electromagnetic shielding doors in high temperature and high humidity environments is solved, real-time monitoring and efficient thermal insulation are achieved, and the improvement of Shielding performance and sealing effect.
Patent Information
- Application Number
- CN202420542058.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-20
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-03-20
AI Technical Summary
Traditional electromagnetic shielding doors lack thermal insulation performance in high temperature and high humidity environments, resulting in excessive temperature difference between the inside and outside of the shielding doors, resulting in condensation water, damage to the metal structure, and reduce the shielding performance, which may lead to leakage of sensitive information.
An electromagnetic shielding door was designed, integrating an electromagnetic shielding performance monitor and a multi-layer thermal insulation structure, including T-shaped sealing strips, adhesive strips, insulating plates and multi-layer thermal insulation plates, to improve sealing performance and thermal insulation effect.
By monitoring the shielding performance in real time, timely rectification or replacement of the shielding doors can avoid information leakage; at the same time, the multi-layer thermal insulation structure effectively alleviates the condensation problem, reduces corrosion of the metal structure, and improves shielding performance and air sound insulation.
Smart Images
Figure CN222478553U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of electromagnetic shielding, and in particular relates to an electromagnetic shielding door. Background Art
[0002] As the infrastructure for processing key information, the electromagnetic shielding room is usually made of metal materials such as steel plates and copper mesh to form a continuous conductive metal enclosed space. The six sides of the interior decoration layer of the room are filled with thermal insulation rock. By setting up precision air conditioning, the room achieves a constant temperature and humidity environment to ensure the normal operation of the equipment. As the key shielding component of the electromagnetic shielding room, the shielding performance and thermal insulation performance of the electromagnetic shielding door itself are crucial to maintaining the basic environment of the shielding room.
[0003] Usually, the electromagnetic shielding room is located inside a building or in a dry climate. Traditional electromagnetic shielding doors can effectively block the leakage of electromagnetic information and the impact of condensation water caused by the temperature difference between the inside and outside of the room on the electromagnetic shielding door. However, in the high temperature and high humidity environment of the coastal area, traditional electromagnetic shielding doors do not have excellent thermal insulation performance, resulting in a large temperature difference between the inside and outside of the shielding door, and a large amount of condensation water is generated inside the shielding door leaf, which is not only easy to corrode the finger springs of the shielding door frame and its own metal structural parts, but also leads to a decrease in the shielding performance of the shielding door, causing the leakage of sensitive information in the room. Therefore, it is necessary to start with monitoring the shielding effectiveness and improving the sealing performance. Utility Model Content
[0004] In view of the above technical problems, the utility model provides an electromagnetic shielding door, which is provided with an electromagnetic shielding effectiveness monitor, and can monitor the shielding effectiveness; and also improves the overall sealing performance.
[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:
[0006] An electromagnetic shielding door comprises a shielding door frame, a shielding door leaf and an electromagnetic shielding effectiveness monitor, wherein the shielding door leaf is connected to the shielding door frame; the electromagnetic shielding effectiveness monitor comprises a transmitting device and a receiving device, wherein the transmitting device is embedded in the inner side of the shielding door leaf, and the receiving device is embedded in the outer side of the shielding door leaf, and a card frame connected to the transmitting device and the receiving device is fixed in the shielding door leaf, and the transmitting device and the receiving device are fixedly connected to the corresponding card frame by a first bolt respectively; the outer ends of the transmitting device and the receiving device are provided with sealing strips for sealing with the shielding door leaf.
[0007] The sealing strip is a T-shaped sealing strip.
[0008] One end of the screen door leaf is hinged to the screen door frame, and a locking device is arranged between the screen door leaf and the screen door frame.
[0009] A shielding connection device is provided on the shielding door frame, and the shielding connection device includes a first layer frame and a second layer frame, and the cross-sectional shape of the first layer frame and the second layer frame are both L-shaped; the horizontal parts of the first layer frame and the second layer frame are fixed to the shielding door frame from the outside to the inside by second bolts, and there are gaps between the vertical part of the first layer frame and the vertical part of the second layer frame, and between the vertical part of the second layer frame and the shielding door frame, and there are shielding springs in each gap.
[0010] A first adhesive strip is arranged between the first layer frame and the shielding door frame, between the first layer frame and the second layer frame, and between the second layer frame and the shielding door frame.
[0011] A decorative cover for shielding the end of the second bolt is fixed on the horizontal portion of the first layer frame.
[0012] The shielding door frame comprises an outer door frame and an outer reinforcement frame, the outer door frame and the outer reinforcement frame are fixedly connected, a first heat insulation board is arranged between the outer door frame and the outer reinforcement frame, and a door frame decorative board is fixed to the outer layer of the first heat insulation board.
[0013] The shielding door leaf comprises an inner plate and an outer cover plate, and the inner plate and the outer cover plate are connected by an adapter plate; an inner blade frame is fixed on the inner side of the inner plate, a second heat insulation plate is arranged on the inner side of the inner plate, and an inner decorative plate is fixed on the outer layer of the second heat insulation plate; a third heat insulation plate is arranged on the outer side of the outer cover plate, and an outer decorative plate is fixed on the outer layer of the third heat insulation plate.
[0014] It also includes a transverse rectangular tube, which is fixedly connected to the inner plate; a second rubber strip is provided between the inner insert knife frame and the inner plate and between the outer decorative plate and the inner plate.
[0015] An insulating plate is fixed between the inner layer plate and the adapter plate.
[0016] Compared with the prior art, the utility model has the following beneficial effects:
[0017] A magnetic shielding effectiveness monitor is provided, with its transmitting device embedded in the inner side of the shielding door leaf and its receiving device embedded in the outer side of the shielding door leaf. It can monitor the shielding effectiveness of the electromagnetic shielding door in real time online so that the shielding door can be promptly rectified or replaced when its shielding effectiveness decreases, so as to avoid electromagnetic leakage of sensitive information in the computer room.
[0018] Rubber strips are set at the joints of the first layer frame and the door outer frame, the joints of the second layer frame, the first layer frame and the door outer frame, and the intersections of the inner knife frame and the inner plate knife edge. The outer nuts of the bolt sets are wrapped with decorative tooling to prevent heat and water vapor in the external air from entering the shielding room through the knife edge or bolt gaps, thereby greatly alleviating the corrosion rate of the copper-plated composite knife, beryllium copper reed and shielding gasket, ensuring the shielding performance of the shielding door, and reducing the leakage of air sound information inside the room through the gaps.
[0019] An insulating plate is arranged between the inner plate of the door leaf and the adapter plate to effectively prevent external heat from being transferred through direct contact between the hinge plate and the inner plate of the door leaf, thereby avoiding the generation of condensed water inside the door leaf.
[0020] The utility model fills a heat insulation board on the inner side of the door outer frame and the inner side of the door leaf inner plate, fills a heat insulation board between the door leaf outer cover plate, the adapter plate and the outer decorative plate, and arranges a flexible sealing ring at the opening of the adapter plate and the outer decorative plate, which can effectively isolate the cold loss inside the shielding room, and the external heat and water vapor are transmitted into the interior of the shielding door leaf through the gap of the outer cover plate or the hinged plate, avoid the internal cold and hot collision to produce condensation water, improve the PUE of the shielding room, and increase the air sound insulation of the shielding door at the same time. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a cross-sectional view of the utility model;
[0022] Figure 2 yes Figure 1 A partial enlarged view of the middle A;
[0023] Figure 3 yes Figure 1 A partial enlarged view of point B in the middle;
[0024] Figure 4 It is a schematic diagram of the installation of the receiving device of the utility model;
[0025] Figure 5 It is a structural schematic diagram of the receiving device of the utility model;
[0026] Among them: 1 is the shielding door frame, 2 is the shielding door leaf, 3 is the hinge device, 301 is the hinge seat, 302 is the hinge plate, 4 is the locking device, 5 is the door outer frame, 6 is the shielding connection device, 601 is the first layer frame, 602 is the second layer frame, 603 is the shielding spring, 7 is the outer reinforcement frame, 8-1 is the first insulation board, 8-2 is the second insulation board, 8-3 is the third insulation board, 9-1 is the door frame decorative board, 9-2 is the inner decorative board, 9-3 is the outer decorative board, 10 is the screen Shielding gasket, 11-1 is the first bolt, 11-2 is the second bolt, 11-3 is the third bolt, 12 is the decorative cover, 13-1 is the first rubber strip, 13-2 is the second rubber strip, 14 is the inner plate, 15 is the adapter plate, 16 is the outer cover plate, 17 is the inner blade frame, 18 is the insulating plate, 19 is the circuit board, 20 is the transverse rectangular tube, 21 is the M5 hexagon socket screw, 22 is the flexible sealing ring, 23 is the transmitting device, 24 is the receiving device, 25 is the card frame, and 26 is the sealing strip. DETAILED DESCRIPTION
[0027] The technical solutions in the embodiments of the utility model are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0028] like Figure 1-5 As shown, an electromagnetic shielding door comprises a shielding door frame 1, a shielding door leaf 2 and an electromagnetic shielding effectiveness monitor, wherein the shielding door leaf 2 is connected to the shielding door frame 1. The electromagnetic shielding effectiveness monitor comprises a transmitter 23 and a receiver 24, wherein the transmitter 23 is embedded in the inner side of the shielding door leaf 2, and the receiver 24 is embedded in the outer side of the shielding door leaf 2.
[0029] For the convenience of installation, a card frame 25 connected to the transmitting device 23 and the receiving device 24 is fixed in the shielding door leaf 2, and the transmitting device 23 and the receiving device 24 are fixedly connected to the corresponding card frame 25 by the first bolt 11-1 respectively. The transmitting device 23 and the receiving device 24 are installed in the same way, and the appearance of the two can be set to be consistent. Take the installation of the receiving device 24 as an example: the receiving device 24 is installed into the card frame 25 from the inside to the outside, and the receiving device 24 is fixed to the card frame 25 by the first bolt 11-1. Corresponding bolt holes are provided on the transmitting device 23, the receiving device 24 and the card frame 25.
[0030] The working principle is as follows: the transmitting device generates electromagnetic waves of a specific frequency at a set time, and the receiving device 24 calculates the shielding effectiveness index of the electromagnetic shielding door according to the detected electromagnetic field strength. If the shielding effectiveness index is lower than the set threshold, the shielding door needs to be rectified or replaced in time to avoid leakage of sensitive information. The above-mentioned electromagnetic shielding effectiveness monitor can adopt the structural setting in the prior art, such as the ZN1690D electromagnetic shielding effectiveness automatic monitor sold by Beijing Daze Technology Co., Ltd.
[0031] There are gaps between the transmitting device 23 and the inner side of the shielding door leaf 2 and between the receiving device 24 and the outer side of the shielding door leaf 2, so sealing strips 26 are provided at the outer ends of the transmitting device 23 and the receiving device 24 to seal with the shielding door leaf 2.
[0032] Furthermore, the sealing strip 26 is preferably a T-shaped sealing strip.
[0033] Specifically, one end of the shielding door leaf 2 is connected to the shielding door frame 1 in a hinged manner, and a locking device 4 is provided between the shielding door leaf 2 and the shielding door frame 1. The locking device 4 can be a common shielding door locking device in the prior art.
[0034] As for the hinged connection, it includes a hinge seat 301 and a hinge plate 302. The hinge seat 301 is fixed on the shielding door frame 1. One end of the hinge plate 302 is fixedly arranged in the shielding door leaf 2. The other end of the hinge plate 302 extends through the shielding door leaf 2 and is hinged to the hinge seat 301. The shielding door leaf 2 is provided with a corresponding opening, and a flexible sealing ring 22 is provided at the opening. The flexible sealing ring 22 can be made of EPDM or chloroprene rubber, and can be suitable for sealing in a high-temperature water vapor environment.
[0035] Furthermore, a shielding connection device 6 is provided on the shielding door frame 1, and the shielding connection device 6 includes a first layer frame 601 and a second layer frame 602, and the cross-sectional shapes of the first layer frame 601 and the second layer frame 602 are both L-shaped; the horizontal parts of the first layer frame 601 and the second layer frame 602 are fixed to the shielding door frame 1 from the outside to the inside in sequence by the second bolts 11-2.
[0036] There are gaps between the vertical part of the first frame 601 and the vertical part of the second frame 602, and between the vertical part of the second frame 602 and the shielding door frame 1, and shielding springs 603 are fixed in each gap. The shielding springs 603 are preferably beryllium copper springs, which have excellent compression resistance, resilience and corrosion resistance.
[0037] Furthermore, a first rubber strip 13-1 is provided between the first layer frame 601 and the shielding door frame 1 (joint), between the first layer frame 601 and the second layer frame 602 (joint), and between the second layer frame 602 and the shielding door frame 1 (joint). The first rubber strip 13-1 can be a special rubber strip made of EPDM or chloroprene rubber, which has high mechanical strength, strong weather resistance, and good moisture and water resistance. At the same time, the shape and size of the rubber strip can be closely matched with the reserved space setting of the joint.
[0038] Furthermore, a decorative cover 12 for shielding the end of the second bolt 11 - 2 is fixed on the horizontal portion of the first layer frame 601 ; the decorative cover 12 can be fixedly connected to the horizontal portion of the first layer frame 601 by bonding.
[0039] Furthermore, the shielding door frame 1 includes an outer door frame 5 and an outer reinforcement frame 7, which are fixedly connected, and a first heat insulation board 8-1 is arranged (filled) between the outer door frame 5 and the outer reinforcement frame 7, and a door frame decorative board 9-1 is fixed to the outer layer of the first heat insulation board 8-1.
[0040] Specifically: The first heat insulation board 8-1 is preferably made of hard polyurethane foam, which has a low thermal coefficient, excellent moisture-proof and waterproof and sound-absorbing properties, and is fire-retardant, high-temperature resistant, and has strong anti-deformation ability. In addition, a door frame decorative board 9-1 is set on the outer layer of the heat insulation board, which is preferably made of anti-fold board, which is not only highly waterproof, weather-resistant, flat and non-deformable, but also can keep the interior dry in a hot and humid environment.
[0041] The horizontal parts of the first frame 601 and the second frame 602 are fixed to the shielding door frame 1 (door outer frame 5) from outside to inside by the second bolts 11-2 in sequence; and a shielding gasket 10 stack is provided. During installation, the first frame 601, the second frame 602, and the door outer frame 5 are stacked from outside to inside by the shielding gasket 10 made of metal wire mesh, and then fixed by the second bolts 11-2. The second bolts 11-2 can be M10 bolt sets.
[0042] Furthermore, the shielding door leaf 2 includes an inner plate 14 and an outer cover plate 16, and the inner plate 14 and the outer cover plate 16 are connected by an adapter plate 15; an inner insert knife frame 17 is fixed to the inner side of the inner plate 14. During installation, the inner insert knife frame 17, the inner plate 14 and the adapter plate 15 are superimposed and fastened with an M10 bolt set (third bolt 11-3). At the same time, a shielding gasket 10 made of a metal mesh can also be arranged between the inner insert knife frame 17 and the inner plate 14.
[0043] A second heat insulation board 8-2 is arranged on the inner side of the inner plate 14, and an inner decorative board 9-2 is fixed to the outer layer of the second heat insulation board 8-2; a third heat insulation board 8-3 is arranged on the outer side of the outer cover plate 16, and an outer decorative board 9-3 is fixed to the outer layer of the third heat insulation board 8-3. The second heat insulation board 8-2 and the third heat insulation board 8-3 are made of the same material as the first heat insulation board 8-1.
[0044] Specifically: the outer cover plate 16 and the adapter plate 15 can be fixed by M5 hexagon socket screws 21; similarly, the outer decorative plate 9-3 can also be fixed to the adapter plate 15 and the outer cover plate 16 respectively by M5 hexagon socket screws 21. The transmitting device 23 is embedded between the inner decorative plate 9-2 and the second insulation plate 8-2, and the receiving device 24 is embedded between the outer cover plate 16 and the third insulation plate 8-3, and the transmitting end and the receiving end are installed oppositely. Usually, a circuit board 19 is provided on the shielding door leaf 2, such as being provided on the outer side of the inner plate 14, and the circuit board 19 can be painted with three-proof paint.
[0045] Furthermore, it also includes a transverse rectangular tube 20, which is fixedly connected to the inner plate 14; that is, the inner plate 14 is strengthened by arranging the transverse rectangular tube 20 in the middle to ensure the flatness and mechanical strength of the inner plate 14.
[0046] Furthermore, a second rubber strip 13-2 is provided between the inner insert knife frame 17 and the inner plate 14 and between the outer decorative plate 9-3 and the inner plate 14. That is, a special rubber strip (second rubber strip 13-2) made of EPDM or chloroprene rubber is provided at the intersection of the inner insert knife frame 17 and the inner plate 14 as the knife edge; a special rubber strip 13 (second rubber strip 13-2) made of EPDM or chloroprene rubber is provided at the intersection of the knife edge of the outer decorative plate 9-3 and the inner plate 14.
[0047] Furthermore, an insulating plate 18 is fixed between the inner plate 14 and the adapter plate 15. When installing, the inner blade frame 17, the inner plate 14, the insulating plate 18 and the adapter plate 15 are stacked and fastened with an M10 bolt set. The insulating plate 18 is preferably a thermosetting epoxy resin plate with stable mechanical properties and excellent thermal insulation properties.
[0048] The first rubber strip 13-1 and the second rubber strip 13-2 are both special rubber strips made of the same material, and are named the first rubber strip 13-1 and the second rubber strip 13-2 to distinguish the installation positions. Similarly, the first heat insulation board 8-1, the second heat insulation board 8-2 and the third heat insulation board 8-3 are also made of the same material, and are named the first heat insulation board 8-1, the second heat insulation board 8-2 and the third heat insulation board 8-3 to distinguish the installation positions.
[0049] The door frame decorative panel 9-1, inner decorative panel 9-2 and outer decorative panel 9-3 are made of environmentally friendly waterproof wooden boards that are highly waterproof, weather-resistant, flat, non-deformable and easy to process, preferably compact boards that can keep the interior dry even in a hot and humid environment.
[0050] The inner plate 14 and the inner insert blade frame 17 are made of copper-plated composite material, wherein the copper coating thickness is not less than 0.25 mm. The shielding gasket 10 can be made of conductive metal material or wire mesh in various shapes, the density of the wire mesh is not less than 100 meshes, and the number of folds is not less than 8 layers.
[0051] The utility model can effectively isolate the loss of cold inside the shielded room, improve the PUE of the shielded room, and increase the air sound insulation of the shielded door by filling insulation boards inside the door outer frame 5 and the inner side of the door leaf inner plate 14, and filling insulation boards between the door leaf outer cover plate 16, the adapter plate 15 and the outer decorative plate 9-3.
[0052] Special rubber strips are arranged at the joints of the first layer frame 601 and the door outer frame 5, the joints of the second layer frame 602 and the first layer frame 601 and the door outer frame 5, and the intersections of the inner insert knife frame 17 and the inner layer plate 14. The outer nuts of the bolt sets are pasted and wrapped with decorative tooling (decorative cover 12). At the same time, flexible sealing rings 22 are arranged at the openings of the adapter plate 15 and the outer decorative plate 9-3 to prevent heat and water vapor in the external air from entering the shielding room and the door leaf through the outer cover plate 16, the hinged plate, the knife edge or the bolt gap, thereby greatly alleviating the corrosion rate of the insert knife, the shielding spring 603 and the shielding gasket 10, and reducing the leakage of indoor air sound information through the gaps.
[0053] An insulating plate 18 is provided between the inner plate 14 of the door leaf and the adapter plate 15 to effectively prevent external heat from being directly transferred through the hinge plate and the inner plate 14 of the door leaf, and to avoid condensation caused by the collision of hot and cold inside the door leaf. The circuit board 19 inside the door leaf is painted with three-proof paint to effectively isolate humid air and avoid corrosion and short circuit of the internal circuit board 19. The outer cover plate 16 of the door leaf is equipped with special monitoring equipment, which can monitor the shielding effectiveness of the electromagnetic shielding door in real time online to avoid electromagnetic leakage of sensitive information in the machine room.
[0054] Only the preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention, and various changes should be included in the protection scope of the present invention.
Claims
1. An electromagnetic shielding door, characterized in that: The invention comprises a shielding door frame (1), a shielding door leaf (2) and an electromagnetic shielding effectiveness monitor, wherein the shielding door leaf (2) is connected to the shielding door frame (1); the electromagnetic shielding effectiveness monitor comprises a transmitting device (23) and a receiving device (24), wherein the transmitting device (23) is embedded in the inner side of the shielding door leaf (2), and the receiving device (24) is embedded in the outer side of the shielding door leaf (2); a card frame (25) connected to the transmitting device (23) and the receiving device (24) is fixed in the shielding door leaf (2); the transmitting device (23) and the receiving device (24) are respectively fixedly connected to the corresponding card frame (25) by means of a first bolt (11-1); and the outer ends of the transmitting device (23) and the receiving device (24) are both provided with sealing strips (26) for sealing with the shielding door leaf (2).
2. The electromagnetic shielding door according to claim 1, characterized in that: The sealing strip (26) is a T-shaped sealing strip (26).
3. The electromagnetic shielding door according to claim 1, characterized in that: One end of the shielding door leaf (2) is hinged to the shielding door frame (1), and a locking device (4) is provided between the shielding door leaf (2) and the shielding door frame (1).
4. The electromagnetic shielding door according to claim 1, characterized in that: The shielding door frame (1) is provided with a shielding connection device (6), the shielding connection device (6) comprising a first frame (601) and a second frame (602), the cross-sections of the first frame (601) and the second frame (602) both being L-shaped; the horizontal portions of the first frame (601) and the second frame (602) are fixed to the shielding door frame (1) from the outside to the inside in sequence by second bolts (11-2), there are gaps between the vertical portion of the first frame (601) and the vertical portion of the second frame (602), and between the vertical portion of the second frame (602) and the shielding door frame (1), and shielding spring sheets (603) are provided in each gap.
5. The electromagnetic shielding door according to claim 4, characterized in that: A first rubber strip (13-1) is provided between the first layer frame (601) and the shielding door frame (1), between the first layer frame (601) and the second layer frame (602), and between the second layer frame (602) and the shielding door frame (1).
6. The electromagnetic shielding door according to claim 4, characterized in that: A decorative cover (12) for covering the end of the second bolt (11-2) is fixed on the horizontal portion of the first layer frame (601).
7. An electromagnetic shielding door according to any one of claims 1 to 6, characterized in that: The shielding door frame (1) comprises an outer door frame (5) and an outer reinforcement frame (7); the outer door frame (5) and the outer reinforcement frame (7) are fixedly connected; a first heat insulation board (8-1) is arranged between the outer door frame (5) and the outer reinforcement frame (7); and a door frame decorative board (9-1) is fixed to the outer layer of the first heat insulation board (8-1).
8. The electromagnetic shielding door according to claim 1, characterized in that: The shielding door leaf (2) comprises an inner plate (14) and an outer cover plate (16), the inner plate (14) and the outer cover plate (16) being connected via an adapter plate (15); an inner blade frame (17) is fixed on the inner side of the inner plate (14); a second heat insulation board (8-2) is arranged on the inner side of the inner plate (14); an inner decorative board (9-2) is fixed on the outer layer of the second heat insulation board (8-2); a third heat insulation board (8-3) is arranged on the outer side of the outer cover plate (16); an outer decorative board (9-3) is fixed on the outer layer of the third heat insulation board (8-3).
9. The electromagnetic shielding door according to claim 8, characterized in that: It also comprises a transverse rectangular tube (20), the transverse rectangular tube (20) being fixedly connected to the inner plate (14); a second rubber strip (13-2) is provided between the inner insert knife frame (17) and the inner plate (14) and between the outer decorative plate (9-3) and the inner plate (14).
10. An electromagnetic shielding door according to claim 8 or 9, characterized in that: An insulating plate (18) is fixed between the inner layer plate (14) and the adapter plate (15).